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KVM: x86: Optimize mmio spte zapping when creating/moving memslot
[mirror_ubuntu-bionic-kernel.git] / arch / x86 / kvm / vmx.c
CommitLineData
6aa8b732
AK		 1/*
2 * Kernel-based Virtual Machine driver for Linux
3 *
4 * This module enables machines with Intel VT-x extensions to run virtual
5 * machines without emulation or binary translation.
6 *
7 * Copyright (C) 2006 Qumranet, Inc.
9611c187 8 * Copyright 2010 Red Hat, Inc. and/or its affiliates.
6aa8b732
AK		 9 *
10 * Authors:
11 * Avi Kivity <avi@qumranet.com>
12 * Yaniv Kamay <yaniv@qumranet.com>
13 *
14 * This work is licensed under the terms of the GNU GPL, version 2. See
15 * the COPYING file in the top-level directory.
16 *
17 */
18
85f455f7 19#include "irq.h"
1d737c8a 20#include "mmu.h"
00b27a3e 21#include "cpuid.h"
e495606d 22
edf88417 23#include <linux/kvm_host.h>
6aa8b732 24#include <linux/module.h>
9d8f549d 25#include <linux/kernel.h>
6aa8b732
AK		 26#include <linux/mm.h>
27#include <linux/highmem.h>
e8edc6e0 28#include <linux/sched.h>
c7addb90 29#include <linux/moduleparam.h>
e9bda3b3 30#include <linux/mod_devicetable.h>
229456fc 31#include <linux/ftrace_event.h>
5a0e3ad6 32#include <linux/slab.h>
cafd6659 33#include <linux/tboot.h>
5fdbf976 34#include "kvm_cache_regs.h"
35920a35 35#include "x86.h"
e495606d 36
6aa8b732 37#include <asm/io.h>
3b3be0d1 38#include <asm/desc.h>
13673a90 39#include <asm/vmx.h>
6210e37b 40#include <asm/virtext.h>
a0861c02 41#include <asm/mce.h>
2acf923e
DC		 42#include <asm/i387.h>
43#include <asm/xcr.h>
d7cd9796 44#include <asm/perf_event.h>
8f536b76 45#include <asm/kexec.h>
6aa8b732 46
229456fc
MT		 47#include "trace.h"
48
4ecac3fd 49#define __ex(x) __kvm_handle_fault_on_reboot(x)
5e520e62
AK		 50#define __ex_clear(x, reg) \
51 ____kvm_handle_fault_on_reboot(x, "xor " reg " , " reg)
4ecac3fd 52
6aa8b732
AK		 53MODULE_AUTHOR("Qumranet");
54MODULE_LICENSE("GPL");
55
e9bda3b3
JT		 56static const struct x86_cpu_id vmx_cpu_id[] = {
57 X86_FEATURE_MATCH(X86_FEATURE_VMX),
58 {}
59};
60MODULE_DEVICE_TABLE(x86cpu, vmx_cpu_id);
61
476bc001 62static bool __read_mostly enable_vpid = 1;
736caefe 63module_param_named(vpid, enable_vpid, bool, 0444);
2384d2b3 64
476bc001 65static bool __read_mostly flexpriority_enabled = 1;
736caefe 66module_param_named(flexpriority, flexpriority_enabled, bool, S_IRUGO);
4c9fc8ef 67
476bc001 68static bool __read_mostly enable_ept = 1;
736caefe 69module_param_named(ept, enable_ept, bool, S_IRUGO);
d56f546d 70
476bc001 71static bool __read_mostly enable_unrestricted_guest = 1;
3a624e29
NK		 72module_param_named(unrestricted_guest,
73 enable_unrestricted_guest, bool, S_IRUGO);
74
83c3a331
XH		 75static bool __read_mostly enable_ept_ad_bits = 1;
76module_param_named(eptad, enable_ept_ad_bits, bool, S_IRUGO);
77
a27685c3 78static bool __read_mostly emulate_invalid_guest_state = true;
c1f8bc04 79module_param(emulate_invalid_guest_state, bool, S_IRUGO);
04fa4d32 80
476bc001 81static bool __read_mostly vmm_exclusive = 1;
b923e62e
DX		 82module_param(vmm_exclusive, bool, S_IRUGO);
83
476bc001 84static bool __read_mostly fasteoi = 1;
58fbbf26
KT		 85module_param(fasteoi, bool, S_IRUGO);
86
257090f7 87static bool __read_mostly enable_apicv_reg_vid;
83d4c286 88
801d3424
NHE		 89/*
90 * If nested=1, nested virtualization is supported, i.e., guests may use
91 * VMX and be a hypervisor for its own guests. If nested=0, guests may not
92 * use VMX instructions.
93 */
476bc001 94static bool __read_mostly nested = 0;
801d3424
NHE		 95module_param(nested, bool, S_IRUGO);
96
5037878e
GN		 97#define KVM_GUEST_CR0_MASK (X86_CR0_NW | X86_CR0_CD)
98#define KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST (X86_CR0_WP | X86_CR0_NE)
cdc0e244
AK		 99#define KVM_VM_CR0_ALWAYS_ON \
100 (KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST | X86_CR0_PG | X86_CR0_PE)
4c38609a
AK		 101#define KVM_CR4_GUEST_OWNED_BITS \
102 (X86_CR4_PVI | X86_CR4_DE | X86_CR4_PCE | X86_CR4_OSFXSR \
103 | X86_CR4_OSXMMEXCPT)
104
cdc0e244
AK		 105#define KVM_PMODE_VM_CR4_ALWAYS_ON (X86_CR4_PAE | X86_CR4_VMXE)
106#define KVM_RMODE_VM_CR4_ALWAYS_ON (X86_CR4_VME | X86_CR4_PAE | X86_CR4_VMXE)
107
78ac8b47
AK		 108#define RMODE_GUEST_OWNED_EFLAGS_BITS (~(X86_EFLAGS_IOPL | X86_EFLAGS_VM))
109
4b8d54f9
ZE		 110/*
111 * These 2 parameters are used to config the controls for Pause-Loop Exiting:
112 * ple_gap: upper bound on the amount of time between two successive
113 * executions of PAUSE in a loop. Also indicate if ple enabled.
00c25bce 114 * According to test, this time is usually smaller than 128 cycles.
4b8d54f9
ZE		 115 * ple_window: upper bound on the amount of time a guest is allowed to execute
116 * in a PAUSE loop. Tests indicate that most spinlocks are held for
117 * less than 2^12 cycles
118 * Time is measured based on a counter that runs at the same rate as the TSC,
119 * refer SDM volume 3b section 21.6.13 & 22.1.3.
120 */
00c25bce 121#define KVM_VMX_DEFAULT_PLE_GAP 128
4b8d54f9
ZE		 122#define KVM_VMX_DEFAULT_PLE_WINDOW 4096
123static int ple_gap = KVM_VMX_DEFAULT_PLE_GAP;
124module_param(ple_gap, int, S_IRUGO);
125
126static int ple_window = KVM_VMX_DEFAULT_PLE_WINDOW;
127module_param(ple_window, int, S_IRUGO);
128
83287ea4
AK		 129extern const ulong vmx_return;
130
8bf00a52 131#define NR_AUTOLOAD_MSRS 8
ff2f6fe9 132#define VMCS02_POOL_SIZE 1
61d2ef2c 133
a2fa3e9f
GH		 134struct vmcs {
135 u32 revision_id;
136 u32 abort;
137 char data[0];
138};
139
d462b819
NHE		 140/*
141 * Track a VMCS that may be loaded on a certain CPU. If it is (cpu!=-1), also
142 * remember whether it was VMLAUNCHed, and maintain a linked list of all VMCSs
143 * loaded on this CPU (so we can clear them if the CPU goes down).
144 */
145struct loaded_vmcs {
146 struct vmcs *vmcs;
147 int cpu;
148 int launched;
149 struct list_head loaded_vmcss_on_cpu_link;
150};
151
26bb0981
AK		 152struct shared_msr_entry {
153 unsigned index;
154 u64 data;
d5696725 155 u64 mask;
26bb0981
AK		 156};
157
a9d30f33
NHE		 158/*
159 * struct vmcs12 describes the state that our guest hypervisor (L1) keeps for a
160 * single nested guest (L2), hence the name vmcs12. Any VMX implementation has
161 * a VMCS structure, and vmcs12 is our emulated VMX's VMCS. This structure is
162 * stored in guest memory specified by VMPTRLD, but is opaque to the guest,
163 * which must access it using VMREAD/VMWRITE/VMCLEAR instructions.
164 * More than one of these structures may exist, if L1 runs multiple L2 guests.
165 * nested_vmx_run() will use the data here to build a vmcs02: a VMCS for the
166 * underlying hardware which will be used to run L2.
167 * This structure is packed to ensure that its layout is identical across
168 * machines (necessary for live migration).
169 * If there are changes in this struct, VMCS12_REVISION must be changed.
170 */
22bd0358 171typedef u64 natural_width;
a9d30f33
NHE		 172struct __packed vmcs12 {
173 /* According to the Intel spec, a VMCS region must start with the
174 * following two fields. Then follow implementation-specific data.
175 */
176 u32 revision_id;
177 u32 abort;
22bd0358 178
27d6c865
NHE		 179 u32 launch_state; /* set to 0 by VMCLEAR, to 1 by VMLAUNCH */
180 u32 padding[7]; /* room for future expansion */
181
22bd0358
NHE		 182 u64 io_bitmap_a;
183 u64 io_bitmap_b;
184 u64 msr_bitmap;
185 u64 vm_exit_msr_store_addr;
186 u64 vm_exit_msr_load_addr;
187 u64 vm_entry_msr_load_addr;
188 u64 tsc_offset;
189 u64 virtual_apic_page_addr;
190 u64 apic_access_addr;
191 u64 ept_pointer;
192 u64 guest_physical_address;
193 u64 vmcs_link_pointer;
194 u64 guest_ia32_debugctl;
195 u64 guest_ia32_pat;
196 u64 guest_ia32_efer;
197 u64 guest_ia32_perf_global_ctrl;
198 u64 guest_pdptr0;
199 u64 guest_pdptr1;
200 u64 guest_pdptr2;
201 u64 guest_pdptr3;
202 u64 host_ia32_pat;
203 u64 host_ia32_efer;
204 u64 host_ia32_perf_global_ctrl;
205 u64 padding64[8]; /* room for future expansion */
206 /*
207 * To allow migration of L1 (complete with its L2 guests) between
208 * machines of different natural widths (32 or 64 bit), we cannot have
209 * unsigned long fields with no explict size. We use u64 (aliased
210 * natural_width) instead. Luckily, x86 is little-endian.
211 */
212 natural_width cr0_guest_host_mask;
213 natural_width cr4_guest_host_mask;
214 natural_width cr0_read_shadow;
215 natural_width cr4_read_shadow;
216 natural_width cr3_target_value0;
217 natural_width cr3_target_value1;
218 natural_width cr3_target_value2;
219 natural_width cr3_target_value3;
220 natural_width exit_qualification;
221 natural_width guest_linear_address;
222 natural_width guest_cr0;
223 natural_width guest_cr3;
224 natural_width guest_cr4;
225 natural_width guest_es_base;
226 natural_width guest_cs_base;
227 natural_width guest_ss_base;
228 natural_width guest_ds_base;
229 natural_width guest_fs_base;
230 natural_width guest_gs_base;
231 natural_width guest_ldtr_base;
232 natural_width guest_tr_base;
233 natural_width guest_gdtr_base;
234 natural_width guest_idtr_base;
235 natural_width guest_dr7;
236 natural_width guest_rsp;
237 natural_width guest_rip;
238 natural_width guest_rflags;
239 natural_width guest_pending_dbg_exceptions;
240 natural_width guest_sysenter_esp;
241 natural_width guest_sysenter_eip;
242 natural_width host_cr0;
243 natural_width host_cr3;
244 natural_width host_cr4;
245 natural_width host_fs_base;
246 natural_width host_gs_base;
247 natural_width host_tr_base;
248 natural_width host_gdtr_base;
249 natural_width host_idtr_base;
250 natural_width host_ia32_sysenter_esp;
251 natural_width host_ia32_sysenter_eip;
252 natural_width host_rsp;
253 natural_width host_rip;
254 natural_width paddingl[8]; /* room for future expansion */
255 u32 pin_based_vm_exec_control;
256 u32 cpu_based_vm_exec_control;
257 u32 exception_bitmap;
258 u32 page_fault_error_code_mask;
259 u32 page_fault_error_code_match;
260 u32 cr3_target_count;
261 u32 vm_exit_controls;
262 u32 vm_exit_msr_store_count;
263 u32 vm_exit_msr_load_count;
264 u32 vm_entry_controls;
265 u32 vm_entry_msr_load_count;
266 u32 vm_entry_intr_info_field;
267 u32 vm_entry_exception_error_code;
268 u32 vm_entry_instruction_len;
269 u32 tpr_threshold;
270 u32 secondary_vm_exec_control;
271 u32 vm_instruction_error;
272 u32 vm_exit_reason;
273 u32 vm_exit_intr_info;
274 u32 vm_exit_intr_error_code;
275 u32 idt_vectoring_info_field;
276 u32 idt_vectoring_error_code;
277 u32 vm_exit_instruction_len;
278 u32 vmx_instruction_info;
279 u32 guest_es_limit;
280 u32 guest_cs_limit;
281 u32 guest_ss_limit;
282 u32 guest_ds_limit;
283 u32 guest_fs_limit;
284 u32 guest_gs_limit;
285 u32 guest_ldtr_limit;
286 u32 guest_tr_limit;
287 u32 guest_gdtr_limit;
288 u32 guest_idtr_limit;
289 u32 guest_es_ar_bytes;
290 u32 guest_cs_ar_bytes;
291 u32 guest_ss_ar_bytes;
292 u32 guest_ds_ar_bytes;
293 u32 guest_fs_ar_bytes;
294 u32 guest_gs_ar_bytes;
295 u32 guest_ldtr_ar_bytes;
296 u32 guest_tr_ar_bytes;
297 u32 guest_interruptibility_info;
298 u32 guest_activity_state;
299 u32 guest_sysenter_cs;
300 u32 host_ia32_sysenter_cs;
0238ea91
JK		 301 u32 vmx_preemption_timer_value;
302 u32 padding32[7]; /* room for future expansion */
22bd0358
NHE		 303 u16 virtual_processor_id;
304 u16 guest_es_selector;
305 u16 guest_cs_selector;
306 u16 guest_ss_selector;
307 u16 guest_ds_selector;
308 u16 guest_fs_selector;
309 u16 guest_gs_selector;
310 u16 guest_ldtr_selector;
311 u16 guest_tr_selector;
312 u16 host_es_selector;
313 u16 host_cs_selector;
314 u16 host_ss_selector;
315 u16 host_ds_selector;
316 u16 host_fs_selector;
317 u16 host_gs_selector;
318 u16 host_tr_selector;
a9d30f33
NHE		 319};
320
321/*
322 * VMCS12_REVISION is an arbitrary id that should be changed if the content or
323 * layout of struct vmcs12 is changed. MSR_IA32_VMX_BASIC returns this id, and
324 * VMPTRLD verifies that the VMCS region that L1 is loading contains this id.
325 */
326#define VMCS12_REVISION 0x11e57ed0
327
328/*
329 * VMCS12_SIZE is the number of bytes L1 should allocate for the VMXON region
330 * and any VMCS region. Although only sizeof(struct vmcs12) are used by the
331 * current implementation, 4K are reserved to avoid future complications.
332 */
333#define VMCS12_SIZE 0x1000
334
ff2f6fe9
NHE		 335/* Used to remember the last vmcs02 used for some recently used vmcs12s */
336struct vmcs02_list {
337 struct list_head list;
338 gpa_t vmptr;
339 struct loaded_vmcs vmcs02;
340};
341
ec378aee
NHE		 342/*
343 * The nested_vmx structure is part of vcpu_vmx, and holds information we need
344 * for correct emulation of VMX (i.e., nested VMX) on this vcpu.
345 */
346struct nested_vmx {
347 /* Has the level1 guest done vmxon? */
348 bool vmxon;
a9d30f33
NHE		 349
350 /* The guest-physical address of the current VMCS L1 keeps for L2 */
351 gpa_t current_vmptr;
352 /* The host-usable pointer to the above */
353 struct page *current_vmcs12_page;
354 struct vmcs12 *current_vmcs12;
ff2f6fe9
NHE		 355
356 /* vmcs02_list cache of VMCSs recently used to run L2 guests */
357 struct list_head vmcs02_pool;
358 int vmcs02_num;
fe3ef05c 359 u64 vmcs01_tsc_offset;
644d711a
NHE		 360 /* L2 must run next, and mustn't decide to exit to L1. */
361 bool nested_run_pending;
fe3ef05c
NHE		 362 /*
363 * Guest pages referred to in vmcs02 with host-physical pointers, so
364 * we must keep them pinned while L2 runs.
365 */
366 struct page *apic_access_page;
ec378aee
NHE		 367};
368
a2fa3e9f 369struct vcpu_vmx {
fb3f0f51 370 struct kvm_vcpu vcpu;
313dbd49 371 unsigned long host_rsp;
29bd8a78 372 u8 fail;
69c73028 373 u8 cpl;
9d58b931 374 bool nmi_known_unmasked;
51aa01d1 375 u32 exit_intr_info;
1155f76a 376 u32 idt_vectoring_info;
6de12732 377 ulong rflags;
26bb0981 378 struct shared_msr_entry *guest_msrs;
a2fa3e9f
GH		 379 int nmsrs;
380 int save_nmsrs;
a2fa3e9f 381#ifdef CONFIG_X86_64
44ea2b17
AK		 382 u64 msr_host_kernel_gs_base;
383 u64 msr_guest_kernel_gs_base;
a2fa3e9f 384#endif
d462b819
NHE		 385 /*
386 * loaded_vmcs points to the VMCS currently used in this vcpu. For a
387 * non-nested (L1) guest, it always points to vmcs01. For a nested
388 * guest (L2), it points to a different VMCS.
389 */
390 struct loaded_vmcs vmcs01;
391 struct loaded_vmcs *loaded_vmcs;
392 bool __launched; /* temporary, used in vmx_vcpu_run */
61d2ef2c
AK		 393 struct msr_autoload {
394 unsigned nr;
395 struct vmx_msr_entry guest[NR_AUTOLOAD_MSRS];
396 struct vmx_msr_entry host[NR_AUTOLOAD_MSRS];
397 } msr_autoload;
a2fa3e9f
GH		 398 struct {
399 int loaded;
400 u16 fs_sel, gs_sel, ldt_sel;
b2da15ac
AK		 401#ifdef CONFIG_X86_64
402 u16 ds_sel, es_sel;
403#endif
152d3f2f
LV		 404 int gs_ldt_reload_needed;
405 int fs_reload_needed;
d77c26fc 406 } host_state;
9c8cba37 407 struct {
7ffd92c5 408 int vm86_active;
78ac8b47 409 ulong save_rflags;
f5f7b2fe
AK		 410 struct kvm_segment segs[8];
411 } rmode;
412 struct {
413 u32 bitmask; /* 4 bits per segment (1 bit per field) */
7ffd92c5
AK		 414 struct kvm_save_segment {
415 u16 selector;
416 unsigned long base;
417 u32 limit;
418 u32 ar;
f5f7b2fe 419 } seg[8];
2fb92db1 420 } segment_cache;
2384d2b3 421 int vpid;
04fa4d32 422 bool emulation_required;
3b86cd99
JK		 423
424 /* Support for vnmi-less CPUs */
425 int soft_vnmi_blocked;
426 ktime_t entry_time;
427 s64 vnmi_blocked_time;
a0861c02 428 u32 exit_reason;
4e47c7a6
SY		 429
430 bool rdtscp_enabled;
ec378aee
NHE		 431
432 /* Support for a guest hypervisor (nested VMX) */
433 struct nested_vmx nested;
a2fa3e9f
GH		 434};
435
2fb92db1
AK		 436enum segment_cache_field {
437 SEG_FIELD_SEL = 0,
438 SEG_FIELD_BASE = 1,
439 SEG_FIELD_LIMIT = 2,
440 SEG_FIELD_AR = 3,
441
442 SEG_FIELD_NR = 4
443};
444
a2fa3e9f
GH		 445static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu)
446{
fb3f0f51 447 return container_of(vcpu, struct vcpu_vmx, vcpu);
a2fa3e9f
GH		 448}
449
22bd0358
NHE		 450#define VMCS12_OFFSET(x) offsetof(struct vmcs12, x)
451#define FIELD(number, name) [number] = VMCS12_OFFSET(name)
452#define FIELD64(number, name) [number] = VMCS12_OFFSET(name), \
453 [number##_HIGH] = VMCS12_OFFSET(name)+4
454
772e0318 455static const unsigned short vmcs_field_to_offset_table[] = {
22bd0358
NHE		 456 FIELD(VIRTUAL_PROCESSOR_ID, virtual_processor_id),
457 FIELD(GUEST_ES_SELECTOR, guest_es_selector),
458 FIELD(GUEST_CS_SELECTOR, guest_cs_selector),
459 FIELD(GUEST_SS_SELECTOR, guest_ss_selector),
460 FIELD(GUEST_DS_SELECTOR, guest_ds_selector),
461 FIELD(GUEST_FS_SELECTOR, guest_fs_selector),
462 FIELD(GUEST_GS_SELECTOR, guest_gs_selector),
463 FIELD(GUEST_LDTR_SELECTOR, guest_ldtr_selector),
464 FIELD(GUEST_TR_SELECTOR, guest_tr_selector),
465 FIELD(HOST_ES_SELECTOR, host_es_selector),
466 FIELD(HOST_CS_SELECTOR, host_cs_selector),
467 FIELD(HOST_SS_SELECTOR, host_ss_selector),
468 FIELD(HOST_DS_SELECTOR, host_ds_selector),
469 FIELD(HOST_FS_SELECTOR, host_fs_selector),
470 FIELD(HOST_GS_SELECTOR, host_gs_selector),
471 FIELD(HOST_TR_SELECTOR, host_tr_selector),
472 FIELD64(IO_BITMAP_A, io_bitmap_a),
473 FIELD64(IO_BITMAP_B, io_bitmap_b),
474 FIELD64(MSR_BITMAP, msr_bitmap),
475 FIELD64(VM_EXIT_MSR_STORE_ADDR, vm_exit_msr_store_addr),
476 FIELD64(VM_EXIT_MSR_LOAD_ADDR, vm_exit_msr_load_addr),
477 FIELD64(VM_ENTRY_MSR_LOAD_ADDR, vm_entry_msr_load_addr),
478 FIELD64(TSC_OFFSET, tsc_offset),
479 FIELD64(VIRTUAL_APIC_PAGE_ADDR, virtual_apic_page_addr),
480 FIELD64(APIC_ACCESS_ADDR, apic_access_addr),
481 FIELD64(EPT_POINTER, ept_pointer),
482 FIELD64(GUEST_PHYSICAL_ADDRESS, guest_physical_address),
483 FIELD64(VMCS_LINK_POINTER, vmcs_link_pointer),
484 FIELD64(GUEST_IA32_DEBUGCTL, guest_ia32_debugctl),
485 FIELD64(GUEST_IA32_PAT, guest_ia32_pat),
486 FIELD64(GUEST_IA32_EFER, guest_ia32_efer),
487 FIELD64(GUEST_IA32_PERF_GLOBAL_CTRL, guest_ia32_perf_global_ctrl),
488 FIELD64(GUEST_PDPTR0, guest_pdptr0),
489 FIELD64(GUEST_PDPTR1, guest_pdptr1),
490 FIELD64(GUEST_PDPTR2, guest_pdptr2),
491 FIELD64(GUEST_PDPTR3, guest_pdptr3),
492 FIELD64(HOST_IA32_PAT, host_ia32_pat),
493 FIELD64(HOST_IA32_EFER, host_ia32_efer),
494 FIELD64(HOST_IA32_PERF_GLOBAL_CTRL, host_ia32_perf_global_ctrl),
495 FIELD(PIN_BASED_VM_EXEC_CONTROL, pin_based_vm_exec_control),
496 FIELD(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control),
497 FIELD(EXCEPTION_BITMAP, exception_bitmap),
498 FIELD(PAGE_FAULT_ERROR_CODE_MASK, page_fault_error_code_mask),
499 FIELD(PAGE_FAULT_ERROR_CODE_MATCH, page_fault_error_code_match),
500 FIELD(CR3_TARGET_COUNT, cr3_target_count),
501 FIELD(VM_EXIT_CONTROLS, vm_exit_controls),
502 FIELD(VM_EXIT_MSR_STORE_COUNT, vm_exit_msr_store_count),
503 FIELD(VM_EXIT_MSR_LOAD_COUNT, vm_exit_msr_load_count),
504 FIELD(VM_ENTRY_CONTROLS, vm_entry_controls),
505 FIELD(VM_ENTRY_MSR_LOAD_COUNT, vm_entry_msr_load_count),
506 FIELD(VM_ENTRY_INTR_INFO_FIELD, vm_entry_intr_info_field),
507 FIELD(VM_ENTRY_EXCEPTION_ERROR_CODE, vm_entry_exception_error_code),
508 FIELD(VM_ENTRY_INSTRUCTION_LEN, vm_entry_instruction_len),
509 FIELD(TPR_THRESHOLD, tpr_threshold),
510 FIELD(SECONDARY_VM_EXEC_CONTROL, secondary_vm_exec_control),
511 FIELD(VM_INSTRUCTION_ERROR, vm_instruction_error),
512 FIELD(VM_EXIT_REASON, vm_exit_reason),
513 FIELD(VM_EXIT_INTR_INFO, vm_exit_intr_info),
514 FIELD(VM_EXIT_INTR_ERROR_CODE, vm_exit_intr_error_code),
515 FIELD(IDT_VECTORING_INFO_FIELD, idt_vectoring_info_field),
516 FIELD(IDT_VECTORING_ERROR_CODE, idt_vectoring_error_code),
517 FIELD(VM_EXIT_INSTRUCTION_LEN, vm_exit_instruction_len),
518 FIELD(VMX_INSTRUCTION_INFO, vmx_instruction_info),
519 FIELD(GUEST_ES_LIMIT, guest_es_limit),
520 FIELD(GUEST_CS_LIMIT, guest_cs_limit),
521 FIELD(GUEST_SS_LIMIT, guest_ss_limit),
522 FIELD(GUEST_DS_LIMIT, guest_ds_limit),
523 FIELD(GUEST_FS_LIMIT, guest_fs_limit),
524 FIELD(GUEST_GS_LIMIT, guest_gs_limit),
525 FIELD(GUEST_LDTR_LIMIT, guest_ldtr_limit),
526 FIELD(GUEST_TR_LIMIT, guest_tr_limit),
527 FIELD(GUEST_GDTR_LIMIT, guest_gdtr_limit),
528 FIELD(GUEST_IDTR_LIMIT, guest_idtr_limit),
529 FIELD(GUEST_ES_AR_BYTES, guest_es_ar_bytes),
530 FIELD(GUEST_CS_AR_BYTES, guest_cs_ar_bytes),
531 FIELD(GUEST_SS_AR_BYTES, guest_ss_ar_bytes),
532 FIELD(GUEST_DS_AR_BYTES, guest_ds_ar_bytes),
533 FIELD(GUEST_FS_AR_BYTES, guest_fs_ar_bytes),
534 FIELD(GUEST_GS_AR_BYTES, guest_gs_ar_bytes),
535 FIELD(GUEST_LDTR_AR_BYTES, guest_ldtr_ar_bytes),
536 FIELD(GUEST_TR_AR_BYTES, guest_tr_ar_bytes),
537 FIELD(GUEST_INTERRUPTIBILITY_INFO, guest_interruptibility_info),
538 FIELD(GUEST_ACTIVITY_STATE, guest_activity_state),
539 FIELD(GUEST_SYSENTER_CS, guest_sysenter_cs),
540 FIELD(HOST_IA32_SYSENTER_CS, host_ia32_sysenter_cs),
0238ea91 541 FIELD(VMX_PREEMPTION_TIMER_VALUE, vmx_preemption_timer_value),
22bd0358
NHE		 542 FIELD(CR0_GUEST_HOST_MASK, cr0_guest_host_mask),
543 FIELD(CR4_GUEST_HOST_MASK, cr4_guest_host_mask),
544 FIELD(CR0_READ_SHADOW, cr0_read_shadow),
545 FIELD(CR4_READ_SHADOW, cr4_read_shadow),
546 FIELD(CR3_TARGET_VALUE0, cr3_target_value0),
547 FIELD(CR3_TARGET_VALUE1, cr3_target_value1),
548 FIELD(CR3_TARGET_VALUE2, cr3_target_value2),
549 FIELD(CR3_TARGET_VALUE3, cr3_target_value3),
550 FIELD(EXIT_QUALIFICATION, exit_qualification),
551 FIELD(GUEST_LINEAR_ADDRESS, guest_linear_address),
552 FIELD(GUEST_CR0, guest_cr0),
553 FIELD(GUEST_CR3, guest_cr3),
554 FIELD(GUEST_CR4, guest_cr4),
555 FIELD(GUEST_ES_BASE, guest_es_base),
556 FIELD(GUEST_CS_BASE, guest_cs_base),
557 FIELD(GUEST_SS_BASE, guest_ss_base),
558 FIELD(GUEST_DS_BASE, guest_ds_base),
559 FIELD(GUEST_FS_BASE, guest_fs_base),
560 FIELD(GUEST_GS_BASE, guest_gs_base),
561 FIELD(GUEST_LDTR_BASE, guest_ldtr_base),
562 FIELD(GUEST_TR_BASE, guest_tr_base),
563 FIELD(GUEST_GDTR_BASE, guest_gdtr_base),
564 FIELD(GUEST_IDTR_BASE, guest_idtr_base),
565 FIELD(GUEST_DR7, guest_dr7),
566 FIELD(GUEST_RSP, guest_rsp),
567 FIELD(GUEST_RIP, guest_rip),
568 FIELD(GUEST_RFLAGS, guest_rflags),
569 FIELD(GUEST_PENDING_DBG_EXCEPTIONS, guest_pending_dbg_exceptions),
570 FIELD(GUEST_SYSENTER_ESP, guest_sysenter_esp),
571 FIELD(GUEST_SYSENTER_EIP, guest_sysenter_eip),
572 FIELD(HOST_CR0, host_cr0),
573 FIELD(HOST_CR3, host_cr3),
574 FIELD(HOST_CR4, host_cr4),
575 FIELD(HOST_FS_BASE, host_fs_base),
576 FIELD(HOST_GS_BASE, host_gs_base),
577 FIELD(HOST_TR_BASE, host_tr_base),
578 FIELD(HOST_GDTR_BASE, host_gdtr_base),
579 FIELD(HOST_IDTR_BASE, host_idtr_base),
580 FIELD(HOST_IA32_SYSENTER_ESP, host_ia32_sysenter_esp),
581 FIELD(HOST_IA32_SYSENTER_EIP, host_ia32_sysenter_eip),
582 FIELD(HOST_RSP, host_rsp),
583 FIELD(HOST_RIP, host_rip),
584};
585static const int max_vmcs_field = ARRAY_SIZE(vmcs_field_to_offset_table);
586
587static inline short vmcs_field_to_offset(unsigned long field)
588{
589 if (field >= max_vmcs_field || vmcs_field_to_offset_table[field] == 0)
590 return -1;
591 return vmcs_field_to_offset_table[field];
592}
593
a9d30f33
NHE		 594static inline struct vmcs12 *get_vmcs12(struct kvm_vcpu *vcpu)
595{
596 return to_vmx(vcpu)->nested.current_vmcs12;
597}
598
599static struct page *nested_get_page(struct kvm_vcpu *vcpu, gpa_t addr)
600{
601 struct page *page = gfn_to_page(vcpu->kvm, addr >> PAGE_SHIFT);
32cad84f 602 if (is_error_page(page))
a9d30f33 603 return NULL;
32cad84f 604
a9d30f33
NHE		 605 return page;
606}
607
608static void nested_release_page(struct page *page)
609{
610 kvm_release_page_dirty(page);
611}
612
613static void nested_release_page_clean(struct page *page)
614{
615 kvm_release_page_clean(page);
616}
617
4e1096d2 618static u64 construct_eptp(unsigned long root_hpa);
4610c9cc
DX		 619static void kvm_cpu_vmxon(u64 addr);
620static void kvm_cpu_vmxoff(void);
aff48baa 621static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3);
776e58ea 622static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr);
b246dd5d
OW		 623static void vmx_set_segment(struct kvm_vcpu *vcpu,
624 struct kvm_segment *var, int seg);
625static void vmx_get_segment(struct kvm_vcpu *vcpu,
626 struct kvm_segment *var, int seg);
d99e4152
GN		 627static bool guest_state_valid(struct kvm_vcpu *vcpu);
628static u32 vmx_segment_access_rights(struct kvm_segment *var);
75880a01 629
6aa8b732
AK		 630static DEFINE_PER_CPU(struct vmcs *, vmxarea);
631static DEFINE_PER_CPU(struct vmcs *, current_vmcs);
d462b819
NHE		 632/*
633 * We maintain a per-CPU linked-list of VMCS loaded on that CPU. This is needed
634 * when a CPU is brought down, and we need to VMCLEAR all VMCSs loaded on it.
635 */
636static DEFINE_PER_CPU(struct list_head, loaded_vmcss_on_cpu);
3444d7da 637static DEFINE_PER_CPU(struct desc_ptr, host_gdt);
6aa8b732 638
3e7c73e9
AK		 639static unsigned long *vmx_io_bitmap_a;
640static unsigned long *vmx_io_bitmap_b;
5897297b
AK		 641static unsigned long *vmx_msr_bitmap_legacy;
642static unsigned long *vmx_msr_bitmap_longmode;
8d14695f
YZ		 643static unsigned long *vmx_msr_bitmap_legacy_x2apic;
644static unsigned long *vmx_msr_bitmap_longmode_x2apic;
fdef3ad1 645
110312c8 646static bool cpu_has_load_ia32_efer;
8bf00a52 647static bool cpu_has_load_perf_global_ctrl;
110312c8 648
2384d2b3
SY		 649static DECLARE_BITMAP(vmx_vpid_bitmap, VMX_NR_VPIDS);
650static DEFINE_SPINLOCK(vmx_vpid_lock);
651
1c3d14fe 652static struct vmcs_config {
6aa8b732
AK		 653 int size;
654 int order;
655 u32 revision_id;
1c3d14fe
YS		 656 u32 pin_based_exec_ctrl;
657 u32 cpu_based_exec_ctrl;
f78e0e2e 658 u32 cpu_based_2nd_exec_ctrl;
1c3d14fe
YS		 659 u32 vmexit_ctrl;
660 u32 vmentry_ctrl;
661} vmcs_config;
6aa8b732 662
efff9e53 663static struct vmx_capability {
d56f546d
SY		 664 u32 ept;
665 u32 vpid;
666} vmx_capability;
667
6aa8b732
AK		 668#define VMX_SEGMENT_FIELD(seg) \
669 [VCPU_SREG_##seg] = { \
670 .selector = GUEST_##seg##_SELECTOR, \
671 .base = GUEST_##seg##_BASE, \
672 .limit = GUEST_##seg##_LIMIT, \
673 .ar_bytes = GUEST_##seg##_AR_BYTES, \
674 }
675
772e0318 676static const struct kvm_vmx_segment_field {
6aa8b732
AK		 677 unsigned selector;
678 unsigned base;
679 unsigned limit;
680 unsigned ar_bytes;
681} kvm_vmx_segment_fields[] = {
682 VMX_SEGMENT_FIELD(CS),
683 VMX_SEGMENT_FIELD(DS),
684 VMX_SEGMENT_FIELD(ES),
685 VMX_SEGMENT_FIELD(FS),
686 VMX_SEGMENT_FIELD(GS),
687 VMX_SEGMENT_FIELD(SS),
688 VMX_SEGMENT_FIELD(TR),
689 VMX_SEGMENT_FIELD(LDTR),
690};
691
26bb0981
AK		 692static u64 host_efer;
693
6de4f3ad
AK		 694static void ept_save_pdptrs(struct kvm_vcpu *vcpu);
695
4d56c8a7 696/*
8c06585d 697 * Keep MSR_STAR at the end, as setup_msrs() will try to optimize it
4d56c8a7
AK		 698 * away by decrementing the array size.
699 */
6aa8b732 700static const u32 vmx_msr_index[] = {
05b3e0c2 701#ifdef CONFIG_X86_64
44ea2b17 702 MSR_SYSCALL_MASK, MSR_LSTAR, MSR_CSTAR,
6aa8b732 703#endif
8c06585d 704 MSR_EFER, MSR_TSC_AUX, MSR_STAR,
6aa8b732 705};
9d8f549d 706#define NR_VMX_MSR ARRAY_SIZE(vmx_msr_index)
6aa8b732 707
31299944 708static inline bool is_page_fault(u32 intr_info)
6aa8b732
AK		 709{
710 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
711 INTR_INFO_VALID_MASK)) ==
8ab2d2e2 712 (INTR_TYPE_HARD_EXCEPTION | PF_VECTOR | INTR_INFO_VALID_MASK);
6aa8b732
AK		 713}
714
31299944 715static inline bool is_no_device(u32 intr_info)
2ab455cc
AL		 716{
717 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
718 INTR_INFO_VALID_MASK)) ==
8ab2d2e2 719 (INTR_TYPE_HARD_EXCEPTION | NM_VECTOR | INTR_INFO_VALID_MASK);
2ab455cc
AL		 720}
721
31299944 722static inline bool is_invalid_opcode(u32 intr_info)
7aa81cc0
AL		 723{
724 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
725 INTR_INFO_VALID_MASK)) ==
8ab2d2e2 726 (INTR_TYPE_HARD_EXCEPTION | UD_VECTOR | INTR_INFO_VALID_MASK);
7aa81cc0
AL		 727}
728
31299944 729static inline bool is_external_interrupt(u32 intr_info)
6aa8b732
AK		 730{
731 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK))
732 == (INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK);
733}
734
31299944 735static inline bool is_machine_check(u32 intr_info)
a0861c02
AK		 736{
737 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
738 INTR_INFO_VALID_MASK)) ==
739 (INTR_TYPE_HARD_EXCEPTION | MC_VECTOR | INTR_INFO_VALID_MASK);
740}
741
31299944 742static inline bool cpu_has_vmx_msr_bitmap(void)
25c5f225 743{
04547156 744 return vmcs_config.cpu_based_exec_ctrl & CPU_BASED_USE_MSR_BITMAPS;
25c5f225
SY		 745}
746
31299944 747static inline bool cpu_has_vmx_tpr_shadow(void)
6e5d865c 748{
04547156 749 return vmcs_config.cpu_based_exec_ctrl & CPU_BASED_TPR_SHADOW;
6e5d865c
YS		 750}
751
31299944 752static inline bool vm_need_tpr_shadow(struct kvm *kvm)
6e5d865c 753{
04547156 754 return (cpu_has_vmx_tpr_shadow()) && (irqchip_in_kernel(kvm));
6e5d865c
YS		 755}
756
31299944 757static inline bool cpu_has_secondary_exec_ctrls(void)
f78e0e2e 758{
04547156
SY		 759 return vmcs_config.cpu_based_exec_ctrl &
760 CPU_BASED_ACTIVATE_SECONDARY_CONTROLS;
f78e0e2e
SY		 761}
762
774ead3a 763static inline bool cpu_has_vmx_virtualize_apic_accesses(void)
f78e0e2e 764{
04547156
SY		 765 return vmcs_config.cpu_based_2nd_exec_ctrl &
766 SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES;
767}
768
8d14695f
YZ		 769static inline bool cpu_has_vmx_virtualize_x2apic_mode(void)
770{
771 return vmcs_config.cpu_based_2nd_exec_ctrl &
772 SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE;
773}
774
83d4c286
YZ		 775static inline bool cpu_has_vmx_apic_register_virt(void)
776{
777 return vmcs_config.cpu_based_2nd_exec_ctrl &
778 SECONDARY_EXEC_APIC_REGISTER_VIRT;
779}
780
c7c9c56c
YZ		 781static inline bool cpu_has_vmx_virtual_intr_delivery(void)
782{
783 return vmcs_config.cpu_based_2nd_exec_ctrl &
784 SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY;
785}
786
04547156
SY		 787static inline bool cpu_has_vmx_flexpriority(void)
788{
789 return cpu_has_vmx_tpr_shadow() &&
790 cpu_has_vmx_virtualize_apic_accesses();
f78e0e2e
SY		 791}
792
e799794e
MT		 793static inline bool cpu_has_vmx_ept_execute_only(void)
794{
31299944 795 return vmx_capability.ept & VMX_EPT_EXECUTE_ONLY_BIT;
e799794e
MT		 796}
797
798static inline bool cpu_has_vmx_eptp_uncacheable(void)
799{
31299944 800 return vmx_capability.ept & VMX_EPTP_UC_BIT;
e799794e
MT		 801}
802
803static inline bool cpu_has_vmx_eptp_writeback(void)
804{
31299944 805 return vmx_capability.ept & VMX_EPTP_WB_BIT;
e799794e
MT		 806}
807
808static inline bool cpu_has_vmx_ept_2m_page(void)
809{
31299944 810 return vmx_capability.ept & VMX_EPT_2MB_PAGE_BIT;
e799794e
MT		 811}
812
878403b7
SY		 813static inline bool cpu_has_vmx_ept_1g_page(void)
814{
31299944 815 return vmx_capability.ept & VMX_EPT_1GB_PAGE_BIT;
878403b7
SY		 816}
817
4bc9b982
SY		 818static inline bool cpu_has_vmx_ept_4levels(void)
819{
820 return vmx_capability.ept & VMX_EPT_PAGE_WALK_4_BIT;
821}
822
83c3a331
XH		 823static inline bool cpu_has_vmx_ept_ad_bits(void)
824{
825 return vmx_capability.ept & VMX_EPT_AD_BIT;
826}
827
31299944 828static inline bool cpu_has_vmx_invept_context(void)
d56f546d 829{
31299944 830 return vmx_capability.ept & VMX_EPT_EXTENT_CONTEXT_BIT;
d56f546d
SY		 831}
832
31299944 833static inline bool cpu_has_vmx_invept_global(void)
d56f546d 834{
31299944 835 return vmx_capability.ept & VMX_EPT_EXTENT_GLOBAL_BIT;
d56f546d
SY		 836}
837
518c8aee
GJ		 838static inline bool cpu_has_vmx_invvpid_single(void)
839{
840 return vmx_capability.vpid & VMX_VPID_EXTENT_SINGLE_CONTEXT_BIT;
841}
842
b9d762fa
GJ		 843static inline bool cpu_has_vmx_invvpid_global(void)
844{
845 return vmx_capability.vpid & VMX_VPID_EXTENT_GLOBAL_CONTEXT_BIT;
846}
847
31299944 848static inline bool cpu_has_vmx_ept(void)
d56f546d 849{
04547156
SY		 850 return vmcs_config.cpu_based_2nd_exec_ctrl &
851 SECONDARY_EXEC_ENABLE_EPT;
d56f546d
SY		 852}
853
31299944 854static inline bool cpu_has_vmx_unrestricted_guest(void)
3a624e29
NK		 855{
856 return vmcs_config.cpu_based_2nd_exec_ctrl &
857 SECONDARY_EXEC_UNRESTRICTED_GUEST;
858}
859
31299944 860static inline bool cpu_has_vmx_ple(void)
4b8d54f9
ZE		 861{
862 return vmcs_config.cpu_based_2nd_exec_ctrl &
863 SECONDARY_EXEC_PAUSE_LOOP_EXITING;
864}
865
31299944 866static inline bool vm_need_virtualize_apic_accesses(struct kvm *kvm)
f78e0e2e 867{
6d3e435e 868 return flexpriority_enabled && irqchip_in_kernel(kvm);
f78e0e2e
SY		 869}
870
31299944 871static inline bool cpu_has_vmx_vpid(void)
2384d2b3 872{
04547156
SY		 873 return vmcs_config.cpu_based_2nd_exec_ctrl &
874 SECONDARY_EXEC_ENABLE_VPID;
2384d2b3
SY		 875}
876
31299944 877static inline bool cpu_has_vmx_rdtscp(void)
4e47c7a6
SY		 878{
879 return vmcs_config.cpu_based_2nd_exec_ctrl &
880 SECONDARY_EXEC_RDTSCP;
881}
882
ad756a16
MJ		 883static inline bool cpu_has_vmx_invpcid(void)
884{
885 return vmcs_config.cpu_based_2nd_exec_ctrl &
886 SECONDARY_EXEC_ENABLE_INVPCID;
887}
888
31299944 889static inline bool cpu_has_virtual_nmis(void)
f08864b4
SY		 890{
891 return vmcs_config.pin_based_exec_ctrl & PIN_BASED_VIRTUAL_NMIS;
892}
893
f5f48ee1
SY		 894static inline bool cpu_has_vmx_wbinvd_exit(void)
895{
896 return vmcs_config.cpu_based_2nd_exec_ctrl &
897 SECONDARY_EXEC_WBINVD_EXITING;
898}
899
04547156
SY		 900static inline bool report_flexpriority(void)
901{
902 return flexpriority_enabled;
903}
904
fe3ef05c
NHE		 905static inline bool nested_cpu_has(struct vmcs12 *vmcs12, u32 bit)
906{
907 return vmcs12->cpu_based_vm_exec_control & bit;
908}
909
910static inline bool nested_cpu_has2(struct vmcs12 *vmcs12, u32 bit)
911{
912 return (vmcs12->cpu_based_vm_exec_control &
913 CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) &&
914 (vmcs12->secondary_vm_exec_control & bit);
915}
916
644d711a
NHE		 917static inline bool nested_cpu_has_virtual_nmis(struct vmcs12 *vmcs12,
918 struct kvm_vcpu *vcpu)
919{
920 return vmcs12->pin_based_vm_exec_control & PIN_BASED_VIRTUAL_NMIS;
921}
922
923static inline bool is_exception(u32 intr_info)
924{
925 return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK))
926 == (INTR_TYPE_HARD_EXCEPTION | INTR_INFO_VALID_MASK);
927}
928
929static void nested_vmx_vmexit(struct kvm_vcpu *vcpu);
7c177938
NHE		 930static void nested_vmx_entry_failure(struct kvm_vcpu *vcpu,
931 struct vmcs12 *vmcs12,
932 u32 reason, unsigned long qualification);
933
8b9cf98c 934static int __find_msr_index(struct vcpu_vmx *vmx, u32 msr)
7725f0ba
AK		 935{
936 int i;
937
a2fa3e9f 938 for (i = 0; i < vmx->nmsrs; ++i)
26bb0981 939 if (vmx_msr_index[vmx->guest_msrs[i].index] == msr)
a75beee6
ED		 940 return i;
941 return -1;
942}
943
2384d2b3
SY		 944static inline void __invvpid(int ext, u16 vpid, gva_t gva)
945{
946 struct {
947 u64 vpid : 16;
948 u64 rsvd : 48;
949 u64 gva;
950 } operand = { vpid, 0, gva };
951
4ecac3fd 952 asm volatile (__ex(ASM_VMX_INVVPID)
2384d2b3
SY		 953 /* CF==1 or ZF==1 --> rc = -1 */
954 "; ja 1f ; ud2 ; 1:"
955 : : "a"(&operand), "c"(ext) : "cc", "memory");
956}
957
1439442c
SY		 958static inline void __invept(int ext, u64 eptp, gpa_t gpa)
959{
960 struct {
961 u64 eptp, gpa;
962 } operand = {eptp, gpa};
963
4ecac3fd 964 asm volatile (__ex(ASM_VMX_INVEPT)
1439442c
SY		 965 /* CF==1 or ZF==1 --> rc = -1 */
966 "; ja 1f ; ud2 ; 1:\n"
967 : : "a" (&operand), "c" (ext) : "cc", "memory");
968}
969
26bb0981 970static struct shared_msr_entry *find_msr_entry(struct vcpu_vmx *vmx, u32 msr)
a75beee6
ED		 971{
972 int i;
973
8b9cf98c 974 i = __find_msr_index(vmx, msr);
a75beee6 975 if (i >= 0)
a2fa3e9f 976 return &vmx->guest_msrs[i];
8b6d44c7 977 return NULL;
7725f0ba
AK		 978}
979
6aa8b732
AK		 980static void vmcs_clear(struct vmcs *vmcs)
981{
982 u64 phys_addr = __pa(vmcs);
983 u8 error;
984
4ecac3fd 985 asm volatile (__ex(ASM_VMX_VMCLEAR_RAX) "; setna %0"
16d8f72f 986 : "=qm"(error) : "a"(&phys_addr), "m"(phys_addr)
6aa8b732
AK		 987 : "cc", "memory");
988 if (error)
989 printk(KERN_ERR "kvm: vmclear fail: %p/%llx\n",
990 vmcs, phys_addr);
991}
992
d462b819
NHE		 993static inline void loaded_vmcs_init(struct loaded_vmcs *loaded_vmcs)
994{
995 vmcs_clear(loaded_vmcs->vmcs);
996 loaded_vmcs->cpu = -1;
997 loaded_vmcs->launched = 0;
998}
999
7725b894
DX		 1000static void vmcs_load(struct vmcs *vmcs)
1001{
1002 u64 phys_addr = __pa(vmcs);
1003 u8 error;
1004
1005 asm volatile (__ex(ASM_VMX_VMPTRLD_RAX) "; setna %0"
16d8f72f 1006 : "=qm"(error) : "a"(&phys_addr), "m"(phys_addr)
7725b894
DX		 1007 : "cc", "memory");
1008 if (error)
2844d849 1009 printk(KERN_ERR "kvm: vmptrld %p/%llx failed\n",
7725b894
DX		 1010 vmcs, phys_addr);
1011}
1012
8f536b76
ZY		 1013#ifdef CONFIG_KEXEC
1014/*
1015 * This bitmap is used to indicate whether the vmclear
1016 * operation is enabled on all cpus. All disabled by
1017 * default.
1018 */
1019static cpumask_t crash_vmclear_enabled_bitmap = CPU_MASK_NONE;
1020
1021static inline void crash_enable_local_vmclear(int cpu)
1022{
1023 cpumask_set_cpu(cpu, &crash_vmclear_enabled_bitmap);
1024}
1025
1026static inline void crash_disable_local_vmclear(int cpu)
1027{
1028 cpumask_clear_cpu(cpu, &crash_vmclear_enabled_bitmap);
1029}
1030
1031static inline int crash_local_vmclear_enabled(int cpu)
1032{
1033 return cpumask_test_cpu(cpu, &crash_vmclear_enabled_bitmap);
1034}
1035
1036static void crash_vmclear_local_loaded_vmcss(void)
1037{
1038 int cpu = raw_smp_processor_id();
1039 struct loaded_vmcs *v;
1040
1041 if (!crash_local_vmclear_enabled(cpu))
1042 return;
1043
1044 list_for_each_entry(v, &per_cpu(loaded_vmcss_on_cpu, cpu),
1045 loaded_vmcss_on_cpu_link)
1046 vmcs_clear(v->vmcs);
1047}
1048#else
1049static inline void crash_enable_local_vmclear(int cpu) { }
1050static inline void crash_disable_local_vmclear(int cpu) { }
1051#endif /* CONFIG_KEXEC */
1052
d462b819 1053static void __loaded_vmcs_clear(void *arg)
6aa8b732 1054{
d462b819 1055 struct loaded_vmcs *loaded_vmcs = arg;
d3b2c338 1056 int cpu = raw_smp_processor_id();
6aa8b732 1057
d462b819
NHE		 1058 if (loaded_vmcs->cpu != cpu)
1059 return; /* vcpu migration can race with cpu offline */
1060 if (per_cpu(current_vmcs, cpu) == loaded_vmcs->vmcs)
6aa8b732 1061 per_cpu(current_vmcs, cpu) = NULL;
8f536b76 1062 crash_disable_local_vmclear(cpu);
d462b819 1063 list_del(&loaded_vmcs->loaded_vmcss_on_cpu_link);
5a560f8b
XG		 1064
1065 /*
1066 * we should ensure updating loaded_vmcs->loaded_vmcss_on_cpu_link
1067 * is before setting loaded_vmcs->vcpu to -1 which is done in
1068 * loaded_vmcs_init. Otherwise, other cpu can see vcpu = -1 fist
1069 * then adds the vmcs into percpu list before it is deleted.
1070 */
1071 smp_wmb();
1072
d462b819 1073 loaded_vmcs_init(loaded_vmcs);
8f536b76 1074 crash_enable_local_vmclear(cpu);
6aa8b732
AK		 1075}
1076
d462b819 1077static void loaded_vmcs_clear(struct loaded_vmcs *loaded_vmcs)
8d0be2b3 1078{
e6c7d321
XG		 1079 int cpu = loaded_vmcs->cpu;
1080
1081 if (cpu != -1)
1082 smp_call_function_single(cpu,
1083 __loaded_vmcs_clear, loaded_vmcs, 1);
8d0be2b3
AK		 1084}
1085
1760dd49 1086static inline void vpid_sync_vcpu_single(struct vcpu_vmx *vmx)
2384d2b3
SY		 1087{
1088 if (vmx->vpid == 0)
1089 return;
1090
518c8aee
GJ		 1091 if (cpu_has_vmx_invvpid_single())
1092 __invvpid(VMX_VPID_EXTENT_SINGLE_CONTEXT, vmx->vpid, 0);
2384d2b3
SY		 1093}
1094
b9d762fa
GJ		 1095static inline void vpid_sync_vcpu_global(void)
1096{
1097 if (cpu_has_vmx_invvpid_global())
1098 __invvpid(VMX_VPID_EXTENT_ALL_CONTEXT, 0, 0);
1099}
1100
1101static inline void vpid_sync_context(struct vcpu_vmx *vmx)
1102{
1103 if (cpu_has_vmx_invvpid_single())
1760dd49 1104 vpid_sync_vcpu_single(vmx);
b9d762fa
GJ		 1105 else
1106 vpid_sync_vcpu_global();
1107}
1108
1439442c
SY		 1109static inline void ept_sync_global(void)
1110{
1111 if (cpu_has_vmx_invept_global())
1112 __invept(VMX_EPT_EXTENT_GLOBAL, 0, 0);
1113}
1114
1115static inline void ept_sync_context(u64 eptp)
1116{
089d034e 1117 if (enable_ept) {
1439442c
SY		 1118 if (cpu_has_vmx_invept_context())
1119 __invept(VMX_EPT_EXTENT_CONTEXT, eptp, 0);
1120 else
1121 ept_sync_global();
1122 }
1123}
1124
96304217 1125static __always_inline unsigned long vmcs_readl(unsigned long field)
6aa8b732 1126{
5e520e62 1127 unsigned long value;
6aa8b732 1128
5e520e62
AK		 1129 asm volatile (__ex_clear(ASM_VMX_VMREAD_RDX_RAX, "%0")
1130 : "=a"(value) : "d"(field) : "cc");
6aa8b732
AK		 1131 return value;
1132}
1133
96304217 1134static __always_inline u16 vmcs_read16(unsigned long field)
6aa8b732
AK		 1135{
1136 return vmcs_readl(field);
1137}
1138
96304217 1139static __always_inline u32 vmcs_read32(unsigned long field)
6aa8b732
AK		 1140{
1141 return vmcs_readl(field);
1142}
1143
96304217 1144static __always_inline u64 vmcs_read64(unsigned long field)
6aa8b732 1145{
05b3e0c2 1146#ifdef CONFIG_X86_64
6aa8b732
AK		 1147 return vmcs_readl(field);
1148#else
1149 return vmcs_readl(field) | ((u64)vmcs_readl(field+1) << 32);
1150#endif
1151}
1152
e52de1b8
AK		 1153static noinline void vmwrite_error(unsigned long field, unsigned long value)
1154{
1155 printk(KERN_ERR "vmwrite error: reg %lx value %lx (err %d)\n",
1156 field, value, vmcs_read32(VM_INSTRUCTION_ERROR));
1157 dump_stack();
1158}
1159
6aa8b732
AK		 1160static void vmcs_writel(unsigned long field, unsigned long value)
1161{
1162 u8 error;
1163
4ecac3fd 1164 asm volatile (__ex(ASM_VMX_VMWRITE_RAX_RDX) "; setna %0"
d77c26fc 1165 : "=q"(error) : "a"(value), "d"(field) : "cc");
e52de1b8
AK		 1166 if (unlikely(error))
1167 vmwrite_error(field, value);
6aa8b732
AK		 1168}
1169
1170static void vmcs_write16(unsigned long field, u16 value)
1171{
1172 vmcs_writel(field, value);
1173}
1174
1175static void vmcs_write32(unsigned long field, u32 value)
1176{
1177 vmcs_writel(field, value);
1178}
1179
1180static void vmcs_write64(unsigned long field, u64 value)
1181{
6aa8b732 1182 vmcs_writel(field, value);
7682f2d0 1183#ifndef CONFIG_X86_64
6aa8b732
AK		 1184 asm volatile ("");
1185 vmcs_writel(field+1, value >> 32);
1186#endif
1187}
1188
2ab455cc
AL		 1189static void vmcs_clear_bits(unsigned long field, u32 mask)
1190{
1191 vmcs_writel(field, vmcs_readl(field) & ~mask);
1192}
1193
1194static void vmcs_set_bits(unsigned long field, u32 mask)
1195{
1196 vmcs_writel(field, vmcs_readl(field) | mask);
1197}
1198
2fb92db1
AK		 1199static void vmx_segment_cache_clear(struct vcpu_vmx *vmx)
1200{
1201 vmx->segment_cache.bitmask = 0;
1202}
1203
1204static bool vmx_segment_cache_test_set(struct vcpu_vmx *vmx, unsigned seg,
1205 unsigned field)
1206{
1207 bool ret;
1208 u32 mask = 1 << (seg * SEG_FIELD_NR + field);
1209
1210 if (!(vmx->vcpu.arch.regs_avail & (1 << VCPU_EXREG_SEGMENTS))) {
1211 vmx->vcpu.arch.regs_avail |= (1 << VCPU_EXREG_SEGMENTS);
1212 vmx->segment_cache.bitmask = 0;
1213 }
1214 ret = vmx->segment_cache.bitmask & mask;
1215 vmx->segment_cache.bitmask |= mask;
1216 return ret;
1217}
1218
1219static u16 vmx_read_guest_seg_selector(struct vcpu_vmx *vmx, unsigned seg)
1220{
1221 u16 *p = &vmx->segment_cache.seg[seg].selector;
1222
1223 if (!vmx_segment_cache_test_set(vmx, seg, SEG_FIELD_SEL))
1224 *p = vmcs_read16(kvm_vmx_segment_fields[seg].selector);
1225 return *p;
1226}
1227
1228static ulong vmx_read_guest_seg_base(struct vcpu_vmx *vmx, unsigned seg)
1229{
1230 ulong *p = &vmx->segment_cache.seg[seg].base;
1231
1232 if (!vmx_segment_cache_test_set(vmx, seg, SEG_FIELD_BASE))
1233 *p = vmcs_readl(kvm_vmx_segment_fields[seg].base);
1234 return *p;
1235}
1236
1237static u32 vmx_read_guest_seg_limit(struct vcpu_vmx *vmx, unsigned seg)
1238{
1239 u32 *p = &vmx->segment_cache.seg[seg].limit;
1240
1241 if (!vmx_segment_cache_test_set(vmx, seg, SEG_FIELD_LIMIT))
1242 *p = vmcs_read32(kvm_vmx_segment_fields[seg].limit);
1243 return *p;
1244}
1245
1246static u32 vmx_read_guest_seg_ar(struct vcpu_vmx *vmx, unsigned seg)
1247{
1248 u32 *p = &vmx->segment_cache.seg[seg].ar;
1249
1250 if (!vmx_segment_cache_test_set(vmx, seg, SEG_FIELD_AR))
1251 *p = vmcs_read32(kvm_vmx_segment_fields[seg].ar_bytes);
1252 return *p;
1253}
1254
abd3f2d6
AK		 1255static void update_exception_bitmap(struct kvm_vcpu *vcpu)
1256{
1257 u32 eb;
1258
fd7373cc
JK		 1259 eb = (1u << PF_VECTOR) | (1u << UD_VECTOR) | (1u << MC_VECTOR) |
1260 (1u << NM_VECTOR) | (1u << DB_VECTOR);
1261 if ((vcpu->guest_debug &
1262 (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP)) ==
1263 (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP))
1264 eb |= 1u << BP_VECTOR;
7ffd92c5 1265 if (to_vmx(vcpu)->rmode.vm86_active)
abd3f2d6 1266 eb = ~0;
089d034e 1267 if (enable_ept)
1439442c 1268 eb &= ~(1u << PF_VECTOR); /* bypass_guest_pf = 0 */
02daab21
AK		 1269 if (vcpu->fpu_active)
1270 eb &= ~(1u << NM_VECTOR);
36cf24e0
NHE		 1271
1272 /* When we are running a nested L2 guest and L1 specified for it a
1273 * certain exception bitmap, we must trap the same exceptions and pass
1274 * them to L1. When running L2, we will only handle the exceptions
1275 * specified above if L1 did not want them.
1276 */
1277 if (is_guest_mode(vcpu))
1278 eb |= get_vmcs12(vcpu)->exception_bitmap;
1279
abd3f2d6
AK		 1280 vmcs_write32(EXCEPTION_BITMAP, eb);
1281}
1282
8bf00a52
GN		 1283static void clear_atomic_switch_msr_special(unsigned long entry,
1284 unsigned long exit)
1285{
1286 vmcs_clear_bits(VM_ENTRY_CONTROLS, entry);
1287 vmcs_clear_bits(VM_EXIT_CONTROLS, exit);
1288}
1289
61d2ef2c
AK		 1290static void clear_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr)
1291{
1292 unsigned i;
1293 struct msr_autoload *m = &vmx->msr_autoload;
1294
8bf00a52
GN		 1295 switch (msr) {
1296 case MSR_EFER:
1297 if (cpu_has_load_ia32_efer) {
1298 clear_atomic_switch_msr_special(VM_ENTRY_LOAD_IA32_EFER,
1299 VM_EXIT_LOAD_IA32_EFER);
1300 return;
1301 }
1302 break;
1303 case MSR_CORE_PERF_GLOBAL_CTRL:
1304 if (cpu_has_load_perf_global_ctrl) {
1305 clear_atomic_switch_msr_special(
1306 VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL,
1307 VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL);
1308 return;
1309 }
1310 break;
110312c8
AK		 1311 }
1312
61d2ef2c
AK		 1313 for (i = 0; i < m->nr; ++i)
1314 if (m->guest[i].index == msr)
1315 break;
1316
1317 if (i == m->nr)
1318 return;
1319 --m->nr;
1320 m->guest[i] = m->guest[m->nr];
1321 m->host[i] = m->host[m->nr];
1322 vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, m->nr);
1323 vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, m->nr);
1324}
1325
8bf00a52
GN		 1326static void add_atomic_switch_msr_special(unsigned long entry,
1327 unsigned long exit, unsigned long guest_val_vmcs,
1328 unsigned long host_val_vmcs, u64 guest_val, u64 host_val)
1329{
1330 vmcs_write64(guest_val_vmcs, guest_val);
1331 vmcs_write64(host_val_vmcs, host_val);
1332 vmcs_set_bits(VM_ENTRY_CONTROLS, entry);
1333 vmcs_set_bits(VM_EXIT_CONTROLS, exit);
1334}
1335
61d2ef2c
AK		 1336static void add_atomic_switch_msr(struct vcpu_vmx *vmx, unsigned msr,
1337 u64 guest_val, u64 host_val)
1338{
1339 unsigned i;
1340 struct msr_autoload *m = &vmx->msr_autoload;
1341
8bf00a52
GN		 1342 switch (msr) {
1343 case MSR_EFER:
1344 if (cpu_has_load_ia32_efer) {
1345 add_atomic_switch_msr_special(VM_ENTRY_LOAD_IA32_EFER,
1346 VM_EXIT_LOAD_IA32_EFER,
1347 GUEST_IA32_EFER,
1348 HOST_IA32_EFER,
1349 guest_val, host_val);
1350 return;
1351 }
1352 break;
1353 case MSR_CORE_PERF_GLOBAL_CTRL:
1354 if (cpu_has_load_perf_global_ctrl) {
1355 add_atomic_switch_msr_special(
1356 VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL,
1357 VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL,
1358 GUEST_IA32_PERF_GLOBAL_CTRL,
1359 HOST_IA32_PERF_GLOBAL_CTRL,
1360 guest_val, host_val);
1361 return;
1362 }
1363 break;
110312c8
AK		 1364 }
1365
61d2ef2c
AK		 1366 for (i = 0; i < m->nr; ++i)
1367 if (m->guest[i].index == msr)
1368 break;
1369
e7fc6f93
GN		 1370 if (i == NR_AUTOLOAD_MSRS) {
1371 printk_once(KERN_WARNING"Not enough mst switch entries. "
1372 "Can't add msr %x\n", msr);
1373 return;
1374 } else if (i == m->nr) {
61d2ef2c
AK		 1375 ++m->nr;
1376 vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, m->nr);
1377 vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, m->nr);
1378 }
1379
1380 m->guest[i].index = msr;
1381 m->guest[i].value = guest_val;
1382 m->host[i].index = msr;
1383 m->host[i].value = host_val;
1384}
1385
33ed6329
AK		 1386static void reload_tss(void)
1387{
33ed6329
AK		 1388 /*
1389 * VT restores TR but not its size. Useless.
1390 */
d359192f 1391 struct desc_ptr *gdt = &__get_cpu_var(host_gdt);
a5f61300 1392 struct desc_struct *descs;
33ed6329 1393
d359192f 1394 descs = (void *)gdt->address;
33ed6329
AK		 1395 descs[GDT_ENTRY_TSS].type = 9; /* available TSS */
1396 load_TR_desc();
33ed6329
AK		 1397}
1398
92c0d900 1399static bool update_transition_efer(struct vcpu_vmx *vmx, int efer_offset)
2cc51560 1400{
3a34a881 1401 u64 guest_efer;
51c6cf66
AK		 1402 u64 ignore_bits;
1403
f6801dff 1404 guest_efer = vmx->vcpu.arch.efer;
3a34a881 1405
51c6cf66 1406 /*
0fa06071 1407 * NX is emulated; LMA and LME handled by hardware; SCE meaningless
51c6cf66
AK		 1408 * outside long mode
1409 */
1410 ignore_bits = EFER_NX | EFER_SCE;
1411#ifdef CONFIG_X86_64
1412 ignore_bits |= EFER_LMA | EFER_LME;
1413 /* SCE is meaningful only in long mode on Intel */
1414 if (guest_efer & EFER_LMA)
1415 ignore_bits &= ~(u64)EFER_SCE;
1416#endif
51c6cf66
AK		 1417 guest_efer &= ~ignore_bits;
1418 guest_efer |= host_efer & ignore_bits;
26bb0981 1419 vmx->guest_msrs[efer_offset].data = guest_efer;
d5696725 1420 vmx->guest_msrs[efer_offset].mask = ~ignore_bits;
84ad33ef
AK		 1421
1422 clear_atomic_switch_msr(vmx, MSR_EFER);
1423 /* On ept, can't emulate nx, and must switch nx atomically */
1424 if (enable_ept && ((vmx->vcpu.arch.efer ^ host_efer) & EFER_NX)) {
1425 guest_efer = vmx->vcpu.arch.efer;
1426 if (!(guest_efer & EFER_LMA))
1427 guest_efer &= ~EFER_LME;
1428 add_atomic_switch_msr(vmx, MSR_EFER, guest_efer, host_efer);
1429 return false;
1430 }
1431
26bb0981 1432 return true;
51c6cf66
AK		 1433}
1434
2d49ec72
GN		 1435static unsigned long segment_base(u16 selector)
1436{
d359192f 1437 struct desc_ptr *gdt = &__get_cpu_var(host_gdt);
2d49ec72
GN		 1438 struct desc_struct *d;
1439 unsigned long table_base;
1440 unsigned long v;
1441
1442 if (!(selector & ~3))
1443 return 0;
1444
d359192f 1445 table_base = gdt->address;
2d49ec72
GN		 1446
1447 if (selector & 4) { /* from ldt */
1448 u16 ldt_selector = kvm_read_ldt();
1449
1450 if (!(ldt_selector & ~3))
1451 return 0;
1452
1453 table_base = segment_base(ldt_selector);
1454 }
1455 d = (struct desc_struct *)(table_base + (selector & ~7));
1456 v = get_desc_base(d);
1457#ifdef CONFIG_X86_64
1458 if (d->s == 0 && (d->type == 2 || d->type == 9 || d->type == 11))
1459 v |= ((unsigned long)((struct ldttss_desc64 *)d)->base3) << 32;
1460#endif
1461 return v;
1462}
1463
1464static inline unsigned long kvm_read_tr_base(void)
1465{
1466 u16 tr;
1467 asm("str %0" : "=g"(tr));
1468 return segment_base(tr);
1469}
1470
04d2cc77 1471static void vmx_save_host_state(struct kvm_vcpu *vcpu)
33ed6329 1472{
04d2cc77 1473 struct vcpu_vmx *vmx = to_vmx(vcpu);
26bb0981 1474 int i;
04d2cc77 1475
a2fa3e9f 1476 if (vmx->host_state.loaded)
33ed6329
AK		 1477 return;
1478
a2fa3e9f 1479 vmx->host_state.loaded = 1;
33ed6329
AK		 1480 /*
1481 * Set host fs and gs selectors. Unfortunately, 22.2.3 does not
1482 * allow segment selectors with cpl > 0 or ti == 1.
1483 */
d6e88aec 1484 vmx->host_state.ldt_sel = kvm_read_ldt();
152d3f2f 1485 vmx->host_state.gs_ldt_reload_needed = vmx->host_state.ldt_sel;
9581d442 1486 savesegment(fs, vmx->host_state.fs_sel);
152d3f2f 1487 if (!(vmx->host_state.fs_sel & 7)) {
a2fa3e9f 1488 vmcs_write16(HOST_FS_SELECTOR, vmx->host_state.fs_sel);
152d3f2f
LV		 1489 vmx->host_state.fs_reload_needed = 0;
1490 } else {
33ed6329 1491 vmcs_write16(HOST_FS_SELECTOR, 0);
152d3f2f 1492 vmx->host_state.fs_reload_needed = 1;
33ed6329 1493 }
9581d442 1494 savesegment(gs, vmx->host_state.gs_sel);
a2fa3e9f
GH		 1495 if (!(vmx->host_state.gs_sel & 7))
1496 vmcs_write16(HOST_GS_SELECTOR, vmx->host_state.gs_sel);
33ed6329
AK		 1497 else {
1498 vmcs_write16(HOST_GS_SELECTOR, 0);
152d3f2f 1499 vmx->host_state.gs_ldt_reload_needed = 1;
33ed6329
AK		 1500 }
1501
b2da15ac
AK		 1502#ifdef CONFIG_X86_64
1503 savesegment(ds, vmx->host_state.ds_sel);
1504 savesegment(es, vmx->host_state.es_sel);
1505#endif
1506
33ed6329
AK		 1507#ifdef CONFIG_X86_64
1508 vmcs_writel(HOST_FS_BASE, read_msr(MSR_FS_BASE));
1509 vmcs_writel(HOST_GS_BASE, read_msr(MSR_GS_BASE));
1510#else
a2fa3e9f
GH		 1511 vmcs_writel(HOST_FS_BASE, segment_base(vmx->host_state.fs_sel));
1512 vmcs_writel(HOST_GS_BASE, segment_base(vmx->host_state.gs_sel));
33ed6329 1513#endif
707c0874
AK		 1514
1515#ifdef CONFIG_X86_64
c8770e7b
AK		 1516 rdmsrl(MSR_KERNEL_GS_BASE, vmx->msr_host_kernel_gs_base);
1517 if (is_long_mode(&vmx->vcpu))
44ea2b17 1518 wrmsrl(MSR_KERNEL_GS_BASE, vmx->msr_guest_kernel_gs_base);
707c0874 1519#endif
26bb0981
AK		 1520 for (i = 0; i < vmx->save_nmsrs; ++i)
1521 kvm_set_shared_msr(vmx->guest_msrs[i].index,
d5696725
AK		 1522 vmx->guest_msrs[i].data,
1523 vmx->guest_msrs[i].mask);
33ed6329
AK		 1524}
1525
a9b21b62 1526static void __vmx_load_host_state(struct vcpu_vmx *vmx)
33ed6329 1527{
a2fa3e9f 1528 if (!vmx->host_state.loaded)
33ed6329
AK		 1529 return;
1530
e1beb1d3 1531 ++vmx->vcpu.stat.host_state_reload;
a2fa3e9f 1532 vmx->host_state.loaded = 0;
c8770e7b
AK		 1533#ifdef CONFIG_X86_64
1534 if (is_long_mode(&vmx->vcpu))
1535 rdmsrl(MSR_KERNEL_GS_BASE, vmx->msr_guest_kernel_gs_base);
1536#endif
152d3f2f 1537 if (vmx->host_state.gs_ldt_reload_needed) {
d6e88aec 1538 kvm_load_ldt(vmx->host_state.ldt_sel);
33ed6329 1539#ifdef CONFIG_X86_64
9581d442 1540 load_gs_index(vmx->host_state.gs_sel);
9581d442
AK		 1541#else
1542 loadsegment(gs, vmx->host_state.gs_sel);
33ed6329 1543#endif
33ed6329 1544 }
0a77fe4c
AK		 1545 if (vmx->host_state.fs_reload_needed)
1546 loadsegment(fs, vmx->host_state.fs_sel);
b2da15ac
AK		 1547#ifdef CONFIG_X86_64
1548 if (unlikely(vmx->host_state.ds_sel | vmx->host_state.es_sel)) {
1549 loadsegment(ds, vmx->host_state.ds_sel);
1550 loadsegment(es, vmx->host_state.es_sel);
1551 }
b2da15ac 1552#endif
152d3f2f 1553 reload_tss();
44ea2b17 1554#ifdef CONFIG_X86_64
c8770e7b 1555 wrmsrl(MSR_KERNEL_GS_BASE, vmx->msr_host_kernel_gs_base);
44ea2b17 1556#endif
b1a74bf8
SS		 1557 /*
1558 * If the FPU is not active (through the host task or
1559 * the guest vcpu), then restore the cr0.TS bit.
1560 */
1561 if (!user_has_fpu() && !vmx->vcpu.guest_fpu_loaded)
1562 stts();
3444d7da 1563 load_gdt(&__get_cpu_var(host_gdt));
33ed6329
AK		 1564}
1565
a9b21b62
AK		 1566static void vmx_load_host_state(struct vcpu_vmx *vmx)
1567{
1568 preempt_disable();
1569 __vmx_load_host_state(vmx);
1570 preempt_enable();
1571}
1572
6aa8b732
AK		 1573/*
1574 * Switches to specified vcpu, until a matching vcpu_put(), but assumes
1575 * vcpu mutex is already taken.
1576 */
15ad7146 1577static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
6aa8b732 1578{
a2fa3e9f 1579 struct vcpu_vmx *vmx = to_vmx(vcpu);
4610c9cc 1580 u64 phys_addr = __pa(per_cpu(vmxarea, cpu));
6aa8b732 1581
4610c9cc
DX		 1582 if (!vmm_exclusive)
1583 kvm_cpu_vmxon(phys_addr);
d462b819
NHE		 1584 else if (vmx->loaded_vmcs->cpu != cpu)
1585 loaded_vmcs_clear(vmx->loaded_vmcs);
6aa8b732 1586
d462b819
NHE		 1587 if (per_cpu(current_vmcs, cpu) != vmx->loaded_vmcs->vmcs) {
1588 per_cpu(current_vmcs, cpu) = vmx->loaded_vmcs->vmcs;
1589 vmcs_load(vmx->loaded_vmcs->vmcs);
6aa8b732
AK		 1590 }
1591
d462b819 1592 if (vmx->loaded_vmcs->cpu != cpu) {
d359192f 1593 struct desc_ptr *gdt = &__get_cpu_var(host_gdt);
6aa8b732
AK		 1594 unsigned long sysenter_esp;
1595
a8eeb04a 1596 kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
92fe13be 1597 local_irq_disable();
8f536b76 1598 crash_disable_local_vmclear(cpu);
5a560f8b
XG		 1599
1600 /*
1601 * Read loaded_vmcs->cpu should be before fetching
1602 * loaded_vmcs->loaded_vmcss_on_cpu_link.
1603 * See the comments in __loaded_vmcs_clear().
1604 */
1605 smp_rmb();
1606
d462b819
NHE		 1607 list_add(&vmx->loaded_vmcs->loaded_vmcss_on_cpu_link,
1608 &per_cpu(loaded_vmcss_on_cpu, cpu));
8f536b76 1609 crash_enable_local_vmclear(cpu);
92fe13be
DX		 1610 local_irq_enable();
1611
6aa8b732
AK		 1612 /*
1613 * Linux uses per-cpu TSS and GDT, so set these when switching
1614 * processors.
1615 */
d6e88aec 1616 vmcs_writel(HOST_TR_BASE, kvm_read_tr_base()); /* 22.2.4 */
d359192f 1617 vmcs_writel(HOST_GDTR_BASE, gdt->address); /* 22.2.4 */
6aa8b732
AK		 1618
1619 rdmsrl(MSR_IA32_SYSENTER_ESP, sysenter_esp);
1620 vmcs_writel(HOST_IA32_SYSENTER_ESP, sysenter_esp); /* 22.2.3 */
d462b819 1621 vmx->loaded_vmcs->cpu = cpu;
6aa8b732 1622 }
6aa8b732
AK		 1623}
1624
1625static void vmx_vcpu_put(struct kvm_vcpu *vcpu)
1626{
a9b21b62 1627 __vmx_load_host_state(to_vmx(vcpu));
4610c9cc 1628 if (!vmm_exclusive) {
d462b819
NHE		 1629 __loaded_vmcs_clear(to_vmx(vcpu)->loaded_vmcs);
1630 vcpu->cpu = -1;
4610c9cc
DX		 1631 kvm_cpu_vmxoff();
1632 }
6aa8b732
AK		 1633}
1634
5fd86fcf
AK		 1635static void vmx_fpu_activate(struct kvm_vcpu *vcpu)
1636{
81231c69
AK		 1637 ulong cr0;
1638
5fd86fcf
AK		 1639 if (vcpu->fpu_active)
1640 return;
1641 vcpu->fpu_active = 1;
81231c69
AK		 1642 cr0 = vmcs_readl(GUEST_CR0);
1643 cr0 &= ~(X86_CR0_TS | X86_CR0_MP);
1644 cr0 |= kvm_read_cr0_bits(vcpu, X86_CR0_TS | X86_CR0_MP);
1645 vmcs_writel(GUEST_CR0, cr0);
5fd86fcf 1646 update_exception_bitmap(vcpu);
edcafe3c 1647 vcpu->arch.cr0_guest_owned_bits = X86_CR0_TS;
36cf24e0
NHE		 1648 if (is_guest_mode(vcpu))
1649 vcpu->arch.cr0_guest_owned_bits &=
1650 ~get_vmcs12(vcpu)->cr0_guest_host_mask;
edcafe3c 1651 vmcs_writel(CR0_GUEST_HOST_MASK, ~vcpu->arch.cr0_guest_owned_bits);
5fd86fcf
AK		 1652}
1653
edcafe3c
AK		 1654static void vmx_decache_cr0_guest_bits(struct kvm_vcpu *vcpu);
1655
fe3ef05c
NHE		 1656/*
1657 * Return the cr0 value that a nested guest would read. This is a combination
1658 * of the real cr0 used to run the guest (guest_cr0), and the bits shadowed by
1659 * its hypervisor (cr0_read_shadow).
1660 */
1661static inline unsigned long nested_read_cr0(struct vmcs12 *fields)
1662{
1663 return (fields->guest_cr0 & ~fields->cr0_guest_host_mask) |
1664 (fields->cr0_read_shadow & fields->cr0_guest_host_mask);
1665}
1666static inline unsigned long nested_read_cr4(struct vmcs12 *fields)
1667{
1668 return (fields->guest_cr4 & ~fields->cr4_guest_host_mask) |
1669 (fields->cr4_read_shadow & fields->cr4_guest_host_mask);
1670}
1671
5fd86fcf
AK		 1672static void vmx_fpu_deactivate(struct kvm_vcpu *vcpu)
1673{
36cf24e0
NHE		 1674 /* Note that there is no vcpu->fpu_active = 0 here. The caller must
1675 * set this *before* calling this function.
1676 */
edcafe3c 1677 vmx_decache_cr0_guest_bits(vcpu);
81231c69 1678 vmcs_set_bits(GUEST_CR0, X86_CR0_TS | X86_CR0_MP);
5fd86fcf 1679 update_exception_bitmap(vcpu);
edcafe3c
AK		 1680 vcpu->arch.cr0_guest_owned_bits = 0;
1681 vmcs_writel(CR0_GUEST_HOST_MASK, ~vcpu->arch.cr0_guest_owned_bits);
36cf24e0
NHE		 1682 if (is_guest_mode(vcpu)) {
1683 /*
1684 * L1's specified read shadow might not contain the TS bit,
1685 * so now that we turned on shadowing of this bit, we need to
1686 * set this bit of the shadow. Like in nested_vmx_run we need
1687 * nested_read_cr0(vmcs12), but vmcs12->guest_cr0 is not yet
1688 * up-to-date here because we just decached cr0.TS (and we'll
1689 * only update vmcs12->guest_cr0 on nested exit).
1690 */
1691 struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
1692 vmcs12->guest_cr0 = (vmcs12->guest_cr0 & ~X86_CR0_TS) |
1693 (vcpu->arch.cr0 & X86_CR0_TS);
1694 vmcs_writel(CR0_READ_SHADOW, nested_read_cr0(vmcs12));
1695 } else
1696 vmcs_writel(CR0_READ_SHADOW, vcpu->arch.cr0);
5fd86fcf
AK		 1697}
1698
6aa8b732
AK		 1699static unsigned long vmx_get_rflags(struct kvm_vcpu *vcpu)
1700{
78ac8b47 1701 unsigned long rflags, save_rflags;
345dcaa8 1702
6de12732
AK		 1703 if (!test_bit(VCPU_EXREG_RFLAGS, (ulong *)&vcpu->arch.regs_avail)) {
1704 __set_bit(VCPU_EXREG_RFLAGS, (ulong *)&vcpu->arch.regs_avail);
1705 rflags = vmcs_readl(GUEST_RFLAGS);
1706 if (to_vmx(vcpu)->rmode.vm86_active) {
1707 rflags &= RMODE_GUEST_OWNED_EFLAGS_BITS;
1708 save_rflags = to_vmx(vcpu)->rmode.save_rflags;
1709 rflags |= save_rflags & ~RMODE_GUEST_OWNED_EFLAGS_BITS;
1710 }
1711 to_vmx(vcpu)->rflags = rflags;
78ac8b47 1712 }
6de12732 1713 return to_vmx(vcpu)->rflags;
6aa8b732
AK		 1714}
1715
1716static void vmx_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
1717{
6de12732
AK		 1718 __set_bit(VCPU_EXREG_RFLAGS, (ulong *)&vcpu->arch.regs_avail);
1719 to_vmx(vcpu)->rflags = rflags;
78ac8b47
AK		 1720 if (to_vmx(vcpu)->rmode.vm86_active) {
1721 to_vmx(vcpu)->rmode.save_rflags = rflags;
053de044 1722 rflags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM;
78ac8b47 1723 }
6aa8b732
AK		 1724 vmcs_writel(GUEST_RFLAGS, rflags);
1725}
1726
2809f5d2
GC		 1727static u32 vmx_get_interrupt_shadow(struct kvm_vcpu *vcpu, int mask)
1728{
1729 u32 interruptibility = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO);
1730 int ret = 0;
1731
1732 if (interruptibility & GUEST_INTR_STATE_STI)
48005f64 1733 ret |= KVM_X86_SHADOW_INT_STI;
2809f5d2 1734 if (interruptibility & GUEST_INTR_STATE_MOV_SS)
48005f64 1735 ret |= KVM_X86_SHADOW_INT_MOV_SS;
2809f5d2
GC		 1736
1737 return ret & mask;
1738}
1739
1740static void vmx_set_interrupt_shadow(struct kvm_vcpu *vcpu, int mask)
1741{
1742 u32 interruptibility_old = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO);
1743 u32 interruptibility = interruptibility_old;
1744
1745 interruptibility &= ~(GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS);
1746
48005f64 1747 if (mask & KVM_X86_SHADOW_INT_MOV_SS)
2809f5d2 1748 interruptibility |= GUEST_INTR_STATE_MOV_SS;
48005f64 1749 else if (mask & KVM_X86_SHADOW_INT_STI)
2809f5d2
GC		 1750 interruptibility |= GUEST_INTR_STATE_STI;
1751
1752 if ((interruptibility != interruptibility_old))
1753 vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, interruptibility);
1754}
1755
6aa8b732
AK		 1756static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
1757{
1758 unsigned long rip;
6aa8b732 1759
5fdbf976 1760 rip = kvm_rip_read(vcpu);
6aa8b732 1761 rip += vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
5fdbf976 1762 kvm_rip_write(vcpu, rip);
6aa8b732 1763
2809f5d2
GC		 1764 /* skipping an emulated instruction also counts */
1765 vmx_set_interrupt_shadow(vcpu, 0);
6aa8b732
AK		 1766}
1767
0b6ac343
NHE		 1768/*
1769 * KVM wants to inject page-faults which it got to the guest. This function
1770 * checks whether in a nested guest, we need to inject them to L1 or L2.
1771 * This function assumes it is called with the exit reason in vmcs02 being
1772 * a #PF exception (this is the only case in which KVM injects a #PF when L2
1773 * is running).
1774 */
1775static int nested_pf_handled(struct kvm_vcpu *vcpu)
1776{
1777 struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
1778
1779 /* TODO: also check PFEC_MATCH/MASK, not just EB.PF. */
95871901 1780 if (!(vmcs12->exception_bitmap & (1u << PF_VECTOR)))
0b6ac343
NHE		 1781 return 0;
1782
1783 nested_vmx_vmexit(vcpu);
1784 return 1;
1785}
1786
298101da 1787static void vmx_queue_exception(struct kvm_vcpu *vcpu, unsigned nr,
ce7ddec4
JR		 1788 bool has_error_code, u32 error_code,
1789 bool reinject)
298101da 1790{
77ab6db0 1791 struct vcpu_vmx *vmx = to_vmx(vcpu);
8ab2d2e2 1792 u32 intr_info = nr | INTR_INFO_VALID_MASK;
77ab6db0 1793
0b6ac343
NHE		 1794 if (nr == PF_VECTOR && is_guest_mode(vcpu) &&
1795 nested_pf_handled(vcpu))
1796 return;
1797
8ab2d2e2 1798 if (has_error_code) {
77ab6db0 1799 vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, error_code);
8ab2d2e2
JK		 1800 intr_info |= INTR_INFO_DELIVER_CODE_MASK;
1801 }
77ab6db0 1802
7ffd92c5 1803 if (vmx->rmode.vm86_active) {
71f9833b
SH		 1804 int inc_eip = 0;
1805 if (kvm_exception_is_soft(nr))
1806 inc_eip = vcpu->arch.event_exit_inst_len;
1807 if (kvm_inject_realmode_interrupt(vcpu, nr, inc_eip) != EMULATE_DONE)
a92601bb 1808 kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu);
77ab6db0
JK		 1809 return;
1810 }
1811
66fd3f7f
GN		 1812 if (kvm_exception_is_soft(nr)) {
1813 vmcs_write32(VM_ENTRY_INSTRUCTION_LEN,
1814 vmx->vcpu.arch.event_exit_inst_len);
8ab2d2e2
JK		 1815 intr_info |= INTR_TYPE_SOFT_EXCEPTION;
1816 } else
1817 intr_info |= INTR_TYPE_HARD_EXCEPTION;
1818
1819 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr_info);
298101da
AK		 1820}
1821
4e47c7a6
SY		 1822static bool vmx_rdtscp_supported(void)
1823{
1824 return cpu_has_vmx_rdtscp();
1825}
1826
ad756a16
MJ		 1827static bool vmx_invpcid_supported(void)
1828{
1829 return cpu_has_vmx_invpcid() && enable_ept;
1830}
1831
a75beee6
ED		 1832/*
1833 * Swap MSR entry in host/guest MSR entry array.
1834 */
8b9cf98c 1835static void move_msr_up(struct vcpu_vmx *vmx, int from, int to)
a75beee6 1836{
26bb0981 1837 struct shared_msr_entry tmp;
a2fa3e9f
GH		 1838
1839 tmp = vmx->guest_msrs[to];
1840 vmx->guest_msrs[to] = vmx->guest_msrs[from];
1841 vmx->guest_msrs[from] = tmp;
a75beee6
ED		 1842}
1843
8d14695f
YZ		 1844static void vmx_set_msr_bitmap(struct kvm_vcpu *vcpu)
1845{
1846 unsigned long *msr_bitmap;
1847
1848 if (irqchip_in_kernel(vcpu->kvm) && apic_x2apic_mode(vcpu->arch.apic)) {
1849 if (is_long_mode(vcpu))
1850 msr_bitmap = vmx_msr_bitmap_longmode_x2apic;
1851 else
1852 msr_bitmap = vmx_msr_bitmap_legacy_x2apic;
1853 } else {
1854 if (is_long_mode(vcpu))
1855 msr_bitmap = vmx_msr_bitmap_longmode;
1856 else
1857 msr_bitmap = vmx_msr_bitmap_legacy;
1858 }
1859
1860 vmcs_write64(MSR_BITMAP, __pa(msr_bitmap));
1861}
1862
e38aea3e
AK		 1863/*
1864 * Set up the vmcs to automatically save and restore system
1865 * msrs. Don't touch the 64-bit msrs if the guest is in legacy
1866 * mode, as fiddling with msrs is very expensive.
1867 */
8b9cf98c 1868static void setup_msrs(struct vcpu_vmx *vmx)
e38aea3e 1869{
26bb0981 1870 int save_nmsrs, index;
e38aea3e 1871
a75beee6
ED		 1872 save_nmsrs = 0;
1873#ifdef CONFIG_X86_64
8b9cf98c 1874 if (is_long_mode(&vmx->vcpu)) {
8b9cf98c 1875 index = __find_msr_index(vmx, MSR_SYSCALL_MASK);
a75beee6 1876 if (index >= 0)
8b9cf98c
RR		 1877 move_msr_up(vmx, index, save_nmsrs++);
1878 index = __find_msr_index(vmx, MSR_LSTAR);
a75beee6 1879 if (index >= 0)
8b9cf98c
RR		 1880 move_msr_up(vmx, index, save_nmsrs++);
1881 index = __find_msr_index(vmx, MSR_CSTAR);
a75beee6 1882 if (index >= 0)
8b9cf98c 1883 move_msr_up(vmx, index, save_nmsrs++);
4e47c7a6
SY		 1884 index = __find_msr_index(vmx, MSR_TSC_AUX);
1885 if (index >= 0 && vmx->rdtscp_enabled)
1886 move_msr_up(vmx, index, save_nmsrs++);
a75beee6 1887 /*
8c06585d 1888 * MSR_STAR is only needed on long mode guests, and only
a75beee6
ED		 1889 * if efer.sce is enabled.
1890 */
8c06585d 1891 index = __find_msr_index(vmx, MSR_STAR);
f6801dff 1892 if ((index >= 0) && (vmx->vcpu.arch.efer & EFER_SCE))
8b9cf98c 1893 move_msr_up(vmx, index, save_nmsrs++);
a75beee6
ED		 1894 }
1895#endif
92c0d900
AK		 1896 index = __find_msr_index(vmx, MSR_EFER);
1897 if (index >= 0 && update_transition_efer(vmx, index))
26bb0981 1898 move_msr_up(vmx, index, save_nmsrs++);
e38aea3e 1899
26bb0981 1900 vmx->save_nmsrs = save_nmsrs;
5897297b 1901
8d14695f
YZ		 1902 if (cpu_has_vmx_msr_bitmap())
1903 vmx_set_msr_bitmap(&vmx->vcpu);
e38aea3e
AK		 1904}
1905
6aa8b732
AK		 1906/*
1907 * reads and returns guest's timestamp counter "register"
1908 * guest_tsc = host_tsc + tsc_offset -- 21.3
1909 */
1910static u64 guest_read_tsc(void)
1911{
1912 u64 host_tsc, tsc_offset;
1913
1914 rdtscll(host_tsc);
1915 tsc_offset = vmcs_read64(TSC_OFFSET);
1916 return host_tsc + tsc_offset;
1917}
1918
d5c1785d
NHE		 1919/*
1920 * Like guest_read_tsc, but always returns L1's notion of the timestamp
1921 * counter, even if a nested guest (L2) is currently running.
1922 */
886b470c 1923u64 vmx_read_l1_tsc(struct kvm_vcpu *vcpu, u64 host_tsc)
d5c1785d 1924{
886b470c 1925 u64 tsc_offset;
d5c1785d 1926
d5c1785d
NHE		 1927 tsc_offset = is_guest_mode(vcpu) ?
1928 to_vmx(vcpu)->nested.vmcs01_tsc_offset :
1929 vmcs_read64(TSC_OFFSET);
1930 return host_tsc + tsc_offset;
1931}
1932
4051b188 1933/*
cc578287
ZA		 1934 * Engage any workarounds for mis-matched TSC rates. Currently limited to
1935 * software catchup for faster rates on slower CPUs.
4051b188 1936 */
cc578287 1937static void vmx_set_tsc_khz(struct kvm_vcpu *vcpu, u32 user_tsc_khz, bool scale)
4051b188 1938{
cc578287
ZA		 1939 if (!scale)
1940 return;
1941
1942 if (user_tsc_khz > tsc_khz) {
1943 vcpu->arch.tsc_catchup = 1;
1944 vcpu->arch.tsc_always_catchup = 1;
1945 } else
1946 WARN(1, "user requested TSC rate below hardware speed\n");
4051b188
JR		 1947}
1948
ba904635
WA		 1949static u64 vmx_read_tsc_offset(struct kvm_vcpu *vcpu)
1950{
1951 return vmcs_read64(TSC_OFFSET);
1952}
1953
6aa8b732 1954/*
99e3e30a 1955 * writes 'offset' into guest's timestamp counter offset register
6aa8b732 1956 */
99e3e30a 1957static void vmx_write_tsc_offset(struct kvm_vcpu *vcpu, u64 offset)
6aa8b732 1958{
27fc51b2 1959 if (is_guest_mode(vcpu)) {
7991825b 1960 /*
27fc51b2
NHE		 1961 * We're here if L1 chose not to trap WRMSR to TSC. According
1962 * to the spec, this should set L1's TSC; The offset that L1
1963 * set for L2 remains unchanged, and still needs to be added
1964 * to the newly set TSC to get L2's TSC.
7991825b 1965 */
27fc51b2
NHE		 1966 struct vmcs12 *vmcs12;
1967 to_vmx(vcpu)->nested.vmcs01_tsc_offset = offset;
1968 /* recalculate vmcs02.TSC_OFFSET: */
1969 vmcs12 = get_vmcs12(vcpu);
1970 vmcs_write64(TSC_OFFSET, offset +
1971 (nested_cpu_has(vmcs12, CPU_BASED_USE_TSC_OFFSETING) ?
1972 vmcs12->tsc_offset : 0));
1973 } else {
1974 vmcs_write64(TSC_OFFSET, offset);
1975 }
6aa8b732
AK		 1976}
1977
f1e2b260 1978static void vmx_adjust_tsc_offset(struct kvm_vcpu *vcpu, s64 adjustment, bool host)
e48672fa
ZA		 1979{
1980 u64 offset = vmcs_read64(TSC_OFFSET);
1981 vmcs_write64(TSC_OFFSET, offset + adjustment);
7991825b
NHE		 1982 if (is_guest_mode(vcpu)) {
1983 /* Even when running L2, the adjustment needs to apply to L1 */
1984 to_vmx(vcpu)->nested.vmcs01_tsc_offset += adjustment;
1985 }
e48672fa
ZA		 1986}
1987
857e4099
JR		 1988static u64 vmx_compute_tsc_offset(struct kvm_vcpu *vcpu, u64 target_tsc)
1989{
1990 return target_tsc - native_read_tsc();
1991}
1992
801d3424
NHE		 1993static bool guest_cpuid_has_vmx(struct kvm_vcpu *vcpu)
1994{
1995 struct kvm_cpuid_entry2 *best = kvm_find_cpuid_entry(vcpu, 1, 0);
1996 return best && (best->ecx & (1 << (X86_FEATURE_VMX & 31)));
1997}
1998
1999/*
2000 * nested_vmx_allowed() checks whether a guest should be allowed to use VMX
2001 * instructions and MSRs (i.e., nested VMX). Nested VMX is disabled for
2002 * all guests if the "nested" module option is off, and can also be disabled
2003 * for a single guest by disabling its VMX cpuid bit.
2004 */
2005static inline bool nested_vmx_allowed(struct kvm_vcpu *vcpu)
2006{
2007 return nested && guest_cpuid_has_vmx(vcpu);
2008}
2009
b87a51ae
NHE		 2010/*
2011 * nested_vmx_setup_ctls_msrs() sets up variables containing the values to be
2012 * returned for the various VMX controls MSRs when nested VMX is enabled.
2013 * The same values should also be used to verify that vmcs12 control fields are
2014 * valid during nested entry from L1 to L2.
2015 * Each of these control msrs has a low and high 32-bit half: A low bit is on
2016 * if the corresponding bit in the (32-bit) control field *must* be on, and a
2017 * bit in the high half is on if the corresponding bit in the control field
2018 * may be on. See also vmx_control_verify().
2019 * TODO: allow these variables to be modified (downgraded) by module options
2020 * or other means.
2021 */
2022static u32 nested_vmx_procbased_ctls_low, nested_vmx_procbased_ctls_high;
2023static u32 nested_vmx_secondary_ctls_low, nested_vmx_secondary_ctls_high;
2024static u32 nested_vmx_pinbased_ctls_low, nested_vmx_pinbased_ctls_high;
2025static u32 nested_vmx_exit_ctls_low, nested_vmx_exit_ctls_high;
2026static u32 nested_vmx_entry_ctls_low, nested_vmx_entry_ctls_high;
c18911a2 2027static u32 nested_vmx_misc_low, nested_vmx_misc_high;
b87a51ae
NHE		 2028static __init void nested_vmx_setup_ctls_msrs(void)
2029{
2030 /*
2031 * Note that as a general rule, the high half of the MSRs (bits in
2032 * the control fields which may be 1) should be initialized by the
2033 * intersection of the underlying hardware's MSR (i.e., features which
2034 * can be supported) and the list of features we want to expose -
2035 * because they are known to be properly supported in our code.
2036 * Also, usually, the low half of the MSRs (bits which must be 1) can
2037 * be set to 0, meaning that L1 may turn off any of these bits. The
2038 * reason is that if one of these bits is necessary, it will appear
2039 * in vmcs01 and prepare_vmcs02, when it bitwise-or's the control
2040 * fields of vmcs01 and vmcs02, will turn these bits off - and
2041 * nested_vmx_exit_handled() will not pass related exits to L1.
2042 * These rules have exceptions below.
2043 */
2044
2045 /* pin-based controls */
eabeaacc
JK		 2046 rdmsr(MSR_IA32_VMX_PINBASED_CTLS,
2047 nested_vmx_pinbased_ctls_low, nested_vmx_pinbased_ctls_high);
b87a51ae
NHE		 2048 /*
2049 * According to the Intel spec, if bit 55 of VMX_BASIC is off (as it is
2050 * in our case), bits 1, 2 and 4 (i.e., 0x16) must be 1 in this MSR.
2051 */
eabeaacc
JK		 2052 nested_vmx_pinbased_ctls_low |= PIN_BASED_ALWAYSON_WITHOUT_TRUE_MSR;
2053 nested_vmx_pinbased_ctls_high &= PIN_BASED_EXT_INTR_MASK |
0238ea91
JK		 2054 PIN_BASED_NMI_EXITING | PIN_BASED_VIRTUAL_NMIS |
2055 PIN_BASED_VMX_PREEMPTION_TIMER;
eabeaacc 2056 nested_vmx_pinbased_ctls_high |= PIN_BASED_ALWAYSON_WITHOUT_TRUE_MSR;
b87a51ae 2057
33fb20c3
JK		 2058 /*
2059 * Exit controls
2060 * If bit 55 of VMX_BASIC is off, bits 0-8 and 10, 11, 13, 14, 16 and
2061 * 17 must be 1.
2062 */
2063 nested_vmx_exit_ctls_low = VM_EXIT_ALWAYSON_WITHOUT_TRUE_MSR;
b6f1250e 2064 /* Note that guest use of VM_EXIT_ACK_INTR_ON_EXIT is not supported. */
b87a51ae
NHE		 2065#ifdef CONFIG_X86_64
2066 nested_vmx_exit_ctls_high = VM_EXIT_HOST_ADDR_SPACE_SIZE;
2067#else
2068 nested_vmx_exit_ctls_high = 0;
2069#endif
33fb20c3 2070 nested_vmx_exit_ctls_high |= VM_EXIT_ALWAYSON_WITHOUT_TRUE_MSR;
b87a51ae
NHE		 2071
2072 /* entry controls */
2073 rdmsr(MSR_IA32_VMX_ENTRY_CTLS,
2074 nested_vmx_entry_ctls_low, nested_vmx_entry_ctls_high);
33fb20c3
JK		 2075 /* If bit 55 of VMX_BASIC is off, bits 0-8 and 12 must be 1. */
2076 nested_vmx_entry_ctls_low = VM_ENTRY_ALWAYSON_WITHOUT_TRUE_MSR;
b87a51ae
NHE		 2077 nested_vmx_entry_ctls_high &=
2078 VM_ENTRY_LOAD_IA32_PAT | VM_ENTRY_IA32E_MODE;
33fb20c3 2079 nested_vmx_entry_ctls_high |= VM_ENTRY_ALWAYSON_WITHOUT_TRUE_MSR;
b87a51ae
NHE		 2080
2081 /* cpu-based controls */
2082 rdmsr(MSR_IA32_VMX_PROCBASED_CTLS,
2083 nested_vmx_procbased_ctls_low, nested_vmx_procbased_ctls_high);
2084 nested_vmx_procbased_ctls_low = 0;
2085 nested_vmx_procbased_ctls_high &=
2086 CPU_BASED_VIRTUAL_INTR_PENDING | CPU_BASED_USE_TSC_OFFSETING |
2087 CPU_BASED_HLT_EXITING | CPU_BASED_INVLPG_EXITING |
2088 CPU_BASED_MWAIT_EXITING | CPU_BASED_CR3_LOAD_EXITING |
2089 CPU_BASED_CR3_STORE_EXITING |
2090#ifdef CONFIG_X86_64
2091 CPU_BASED_CR8_LOAD_EXITING | CPU_BASED_CR8_STORE_EXITING |
2092#endif
2093 CPU_BASED_MOV_DR_EXITING | CPU_BASED_UNCOND_IO_EXITING |
2094 CPU_BASED_USE_IO_BITMAPS | CPU_BASED_MONITOR_EXITING |
dbcb4e79 2095 CPU_BASED_RDPMC_EXITING | CPU_BASED_RDTSC_EXITING |
d6851fbe 2096 CPU_BASED_PAUSE_EXITING |
b87a51ae
NHE		 2097 CPU_BASED_ACTIVATE_SECONDARY_CONTROLS;
2098 /*
2099 * We can allow some features even when not supported by the
2100 * hardware. For example, L1 can specify an MSR bitmap - and we
2101 * can use it to avoid exits to L1 - even when L0 runs L2
2102 * without MSR bitmaps.
2103 */
2104 nested_vmx_procbased_ctls_high |= CPU_BASED_USE_MSR_BITMAPS;
2105
2106 /* secondary cpu-based controls */
2107 rdmsr(MSR_IA32_VMX_PROCBASED_CTLS2,
2108 nested_vmx_secondary_ctls_low, nested_vmx_secondary_ctls_high);
2109 nested_vmx_secondary_ctls_low = 0;
2110 nested_vmx_secondary_ctls_high &=
d6851fbe
JK		 2111 SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES |
2112 SECONDARY_EXEC_WBINVD_EXITING;
c18911a2
JK		 2113
2114 /* miscellaneous data */
2115 rdmsr(MSR_IA32_VMX_MISC, nested_vmx_misc_low, nested_vmx_misc_high);
0238ea91
JK		 2116 nested_vmx_misc_low &= VMX_MISC_PREEMPTION_TIMER_RATE_MASK |
2117 VMX_MISC_SAVE_EFER_LMA;
c18911a2 2118 nested_vmx_misc_high = 0;
b87a51ae
NHE		 2119}
2120
2121static inline bool vmx_control_verify(u32 control, u32 low, u32 high)
2122{
2123 /*
2124 * Bits 0 in high must be 0, and bits 1 in low must be 1.
2125 */
2126 return ((control & high) | low) == control;
2127}
2128
2129static inline u64 vmx_control_msr(u32 low, u32 high)
2130{
2131 return low | ((u64)high << 32);
2132}
2133
2134/*
2135 * If we allow our guest to use VMX instructions (i.e., nested VMX), we should
2136 * also let it use VMX-specific MSRs.
2137 * vmx_get_vmx_msr() and vmx_set_vmx_msr() return 1 when we handled a
2138 * VMX-specific MSR, or 0 when we haven't (and the caller should handle it
2139 * like all other MSRs).
2140 */
2141static int vmx_get_vmx_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
2142{
2143 if (!nested_vmx_allowed(vcpu) && msr_index >= MSR_IA32_VMX_BASIC &&
2144 msr_index <= MSR_IA32_VMX_TRUE_ENTRY_CTLS) {
2145 /*
2146 * According to the spec, processors which do not support VMX
2147 * should throw a #GP(0) when VMX capability MSRs are read.
2148 */
2149 kvm_queue_exception_e(vcpu, GP_VECTOR, 0);
2150 return 1;
2151 }
2152
2153 switch (msr_index) {
2154 case MSR_IA32_FEATURE_CONTROL:
2155 *pdata = 0;
2156 break;
2157 case MSR_IA32_VMX_BASIC:
2158 /*
2159 * This MSR reports some information about VMX support. We
2160 * should return information about the VMX we emulate for the
2161 * guest, and the VMCS structure we give it - not about the
2162 * VMX support of the underlying hardware.
2163 */
2164 *pdata = VMCS12_REVISION |
2165 ((u64)VMCS12_SIZE << VMX_BASIC_VMCS_SIZE_SHIFT) |
2166 (VMX_BASIC_MEM_TYPE_WB << VMX_BASIC_MEM_TYPE_SHIFT);
2167 break;
2168 case MSR_IA32_VMX_TRUE_PINBASED_CTLS:
2169 case MSR_IA32_VMX_PINBASED_CTLS:
2170 *pdata = vmx_control_msr(nested_vmx_pinbased_ctls_low,
2171 nested_vmx_pinbased_ctls_high);
2172 break;
2173 case MSR_IA32_VMX_TRUE_PROCBASED_CTLS:
2174 case MSR_IA32_VMX_PROCBASED_CTLS:
2175 *pdata = vmx_control_msr(nested_vmx_procbased_ctls_low,
2176 nested_vmx_procbased_ctls_high);
2177 break;
2178 case MSR_IA32_VMX_TRUE_EXIT_CTLS:
2179 case MSR_IA32_VMX_EXIT_CTLS:
2180 *pdata = vmx_control_msr(nested_vmx_exit_ctls_low,
2181 nested_vmx_exit_ctls_high);
2182 break;
2183 case MSR_IA32_VMX_TRUE_ENTRY_CTLS:
2184 case MSR_IA32_VMX_ENTRY_CTLS:
2185 *pdata = vmx_control_msr(nested_vmx_entry_ctls_low,
2186 nested_vmx_entry_ctls_high);
2187 break;
2188 case MSR_IA32_VMX_MISC:
c18911a2
JK		 2189 *pdata = vmx_control_msr(nested_vmx_misc_low,
2190 nested_vmx_misc_high);
b87a51ae
NHE		 2191 break;
2192 /*
2193 * These MSRs specify bits which the guest must keep fixed (on or off)
2194 * while L1 is in VMXON mode (in L1's root mode, or running an L2).
2195 * We picked the standard core2 setting.
2196 */
2197#define VMXON_CR0_ALWAYSON (X86_CR0_PE | X86_CR0_PG | X86_CR0_NE)
2198#define VMXON_CR4_ALWAYSON X86_CR4_VMXE
2199 case MSR_IA32_VMX_CR0_FIXED0:
2200 *pdata = VMXON_CR0_ALWAYSON;
2201 break;
2202 case MSR_IA32_VMX_CR0_FIXED1:
2203 *pdata = -1ULL;
2204 break;
2205 case MSR_IA32_VMX_CR4_FIXED0:
2206 *pdata = VMXON_CR4_ALWAYSON;
2207 break;
2208 case MSR_IA32_VMX_CR4_FIXED1:
2209 *pdata = -1ULL;
2210 break;
2211 case MSR_IA32_VMX_VMCS_ENUM:
2212 *pdata = 0x1f;
2213 break;
2214 case MSR_IA32_VMX_PROCBASED_CTLS2:
2215 *pdata = vmx_control_msr(nested_vmx_secondary_ctls_low,
2216 nested_vmx_secondary_ctls_high);
2217 break;
2218 case MSR_IA32_VMX_EPT_VPID_CAP:
2219 /* Currently, no nested ept or nested vpid */
2220 *pdata = 0;
2221 break;
2222 default:
2223 return 0;
2224 }
2225
2226 return 1;
2227}
2228
2229static int vmx_set_vmx_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
2230{
2231 if (!nested_vmx_allowed(vcpu))
2232 return 0;
2233
2234 if (msr_index == MSR_IA32_FEATURE_CONTROL)
2235 /* TODO: the right thing. */
2236 return 1;
2237 /*
2238 * No need to treat VMX capability MSRs specially: If we don't handle
2239 * them, handle_wrmsr will #GP(0), which is correct (they are readonly)
2240 */
2241 return 0;
2242}
2243
6aa8b732
AK		 2244/*
2245 * Reads an msr value (of 'msr_index') into 'pdata'.
2246 * Returns 0 on success, non-0 otherwise.
2247 * Assumes vcpu_load() was already called.
2248 */
2249static int vmx_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
2250{
2251 u64 data;
26bb0981 2252 struct shared_msr_entry *msr;
6aa8b732
AK		 2253
2254 if (!pdata) {
2255 printk(KERN_ERR "BUG: get_msr called with NULL pdata\n");
2256 return -EINVAL;
2257 }
2258
2259 switch (msr_index) {
05b3e0c2 2260#ifdef CONFIG_X86_64
6aa8b732
AK		 2261 case MSR_FS_BASE:
2262 data = vmcs_readl(GUEST_FS_BASE);
2263 break;
2264 case MSR_GS_BASE:
2265 data = vmcs_readl(GUEST_GS_BASE);
2266 break;
44ea2b17
AK		 2267 case MSR_KERNEL_GS_BASE:
2268 vmx_load_host_state(to_vmx(vcpu));
2269 data = to_vmx(vcpu)->msr_guest_kernel_gs_base;
2270 break;
26bb0981 2271#endif
6aa8b732 2272 case MSR_EFER:
3bab1f5d 2273 return kvm_get_msr_common(vcpu, msr_index, pdata);
af24a4e4 2274 case MSR_IA32_TSC:
6aa8b732
AK		 2275 data = guest_read_tsc();
2276 break;
2277 case MSR_IA32_SYSENTER_CS:
2278 data = vmcs_read32(GUEST_SYSENTER_CS);
2279 break;
2280 case MSR_IA32_SYSENTER_EIP:
f5b42c33 2281 data = vmcs_readl(GUEST_SYSENTER_EIP);
6aa8b732
AK		 2282 break;
2283 case MSR_IA32_SYSENTER_ESP:
f5b42c33 2284 data = vmcs_readl(GUEST_SYSENTER_ESP);
6aa8b732 2285 break;
4e47c7a6
SY		 2286 case MSR_TSC_AUX:
2287 if (!to_vmx(vcpu)->rdtscp_enabled)
2288 return 1;
2289 /* Otherwise falls through */
6aa8b732 2290 default:
b87a51ae
NHE		 2291 if (vmx_get_vmx_msr(vcpu, msr_index, pdata))
2292 return 0;
8b9cf98c 2293 msr = find_msr_entry(to_vmx(vcpu), msr_index);
3bab1f5d
AK		 2294 if (msr) {
2295 data = msr->data;
2296 break;
6aa8b732 2297 }
3bab1f5d 2298 return kvm_get_msr_common(vcpu, msr_index, pdata);
6aa8b732
AK		 2299 }
2300
2301 *pdata = data;
2302 return 0;
2303}
2304
2305/*
2306 * Writes msr value into into the appropriate "register".
2307 * Returns 0 on success, non-0 otherwise.
2308 * Assumes vcpu_load() was already called.
2309 */
8fe8ab46 2310static int vmx_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
6aa8b732 2311{
a2fa3e9f 2312 struct vcpu_vmx *vmx = to_vmx(vcpu);
26bb0981 2313 struct shared_msr_entry *msr;
2cc51560 2314 int ret = 0;
8fe8ab46
WA		 2315 u32 msr_index = msr_info->index;
2316 u64 data = msr_info->data;
2cc51560 2317
6aa8b732 2318 switch (msr_index) {
3bab1f5d 2319 case MSR_EFER:
8fe8ab46 2320 ret = kvm_set_msr_common(vcpu, msr_info);
2cc51560 2321 break;
16175a79 2322#ifdef CONFIG_X86_64
6aa8b732 2323 case MSR_FS_BASE:
2fb92db1 2324 vmx_segment_cache_clear(vmx);
6aa8b732
AK		 2325 vmcs_writel(GUEST_FS_BASE, data);
2326 break;
2327 case MSR_GS_BASE:
2fb92db1 2328 vmx_segment_cache_clear(vmx);
6aa8b732
AK		 2329 vmcs_writel(GUEST_GS_BASE, data);
2330 break;
44ea2b17
AK		 2331 case MSR_KERNEL_GS_BASE:
2332 vmx_load_host_state(vmx);
2333 vmx->msr_guest_kernel_gs_base = data;
2334 break;
6aa8b732
AK		 2335#endif
2336 case MSR_IA32_SYSENTER_CS:
2337 vmcs_write32(GUEST_SYSENTER_CS, data);
2338 break;
2339 case MSR_IA32_SYSENTER_EIP:
f5b42c33 2340 vmcs_writel(GUEST_SYSENTER_EIP, data);
6aa8b732
AK		 2341 break;
2342 case MSR_IA32_SYSENTER_ESP:
f5b42c33 2343 vmcs_writel(GUEST_SYSENTER_ESP, data);
6aa8b732 2344 break;
af24a4e4 2345 case MSR_IA32_TSC:
8fe8ab46 2346 kvm_write_tsc(vcpu, msr_info);
6aa8b732 2347 break;
468d472f
SY		 2348 case MSR_IA32_CR_PAT:
2349 if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) {
2350 vmcs_write64(GUEST_IA32_PAT, data);
2351 vcpu->arch.pat = data;
2352 break;
2353 }
8fe8ab46 2354 ret = kvm_set_msr_common(vcpu, msr_info);
4e47c7a6 2355 break;
ba904635
WA		 2356 case MSR_IA32_TSC_ADJUST:
2357 ret = kvm_set_msr_common(vcpu, msr_info);
4e47c7a6
SY		 2358 break;
2359 case MSR_TSC_AUX:
2360 if (!vmx->rdtscp_enabled)
2361 return 1;
2362 /* Check reserved bit, higher 32 bits should be zero */
2363 if ((data >> 32) != 0)
2364 return 1;
2365 /* Otherwise falls through */
6aa8b732 2366 default:
b87a51ae
NHE		 2367 if (vmx_set_vmx_msr(vcpu, msr_index, data))
2368 break;
8b9cf98c 2369 msr = find_msr_entry(vmx, msr_index);
3bab1f5d
AK		 2370 if (msr) {
2371 msr->data = data;
2225fd56
AK		 2372 if (msr - vmx->guest_msrs < vmx->save_nmsrs) {
2373 preempt_disable();
9ee73970
AK		 2374 kvm_set_shared_msr(msr->index, msr->data,
2375 msr->mask);
2225fd56
AK		 2376 preempt_enable();
2377 }
3bab1f5d 2378 break;
6aa8b732 2379 }
8fe8ab46 2380 ret = kvm_set_msr_common(vcpu, msr_info);
6aa8b732
AK		 2381 }
2382
2cc51560 2383 return ret;
6aa8b732
AK		 2384}
2385
5fdbf976 2386static void vmx_cache_reg(struct kvm_vcpu *vcpu, enum kvm_reg reg)
6aa8b732 2387{
5fdbf976
MT		 2388 __set_bit(reg, (unsigned long *)&vcpu->arch.regs_avail);
2389 switch (reg) {
2390 case VCPU_REGS_RSP:
2391 vcpu->arch.regs[VCPU_REGS_RSP] = vmcs_readl(GUEST_RSP);
2392 break;
2393 case VCPU_REGS_RIP:
2394 vcpu->arch.regs[VCPU_REGS_RIP] = vmcs_readl(GUEST_RIP);
2395 break;
6de4f3ad
AK		 2396 case VCPU_EXREG_PDPTR:
2397 if (enable_ept)
2398 ept_save_pdptrs(vcpu);
2399 break;
5fdbf976
MT		 2400 default:
2401 break;
2402 }
6aa8b732
AK		 2403}
2404
6aa8b732
AK		 2405static __init int cpu_has_kvm_support(void)
2406{
6210e37b 2407 return cpu_has_vmx();
6aa8b732
AK		 2408}
2409
2410static __init int vmx_disabled_by_bios(void)
2411{
2412 u64 msr;
2413
2414 rdmsrl(MSR_IA32_FEATURE_CONTROL, msr);
cafd6659 2415 if (msr & FEATURE_CONTROL_LOCKED) {
23f3e991 2416 /* launched w/ TXT and VMX disabled */
cafd6659
SW		 2417 if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX)
2418 && tboot_enabled())
2419 return 1;
23f3e991 2420 /* launched w/o TXT and VMX only enabled w/ TXT */
cafd6659 2421 if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX)
23f3e991 2422 && (msr & FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX)
f9335afe
SW		 2423 && !tboot_enabled()) {
2424 printk(KERN_WARNING "kvm: disable TXT in the BIOS or "
23f3e991 2425 "activate TXT before enabling KVM\n");
cafd6659 2426 return 1;
f9335afe 2427 }
23f3e991
JC		 2428 /* launched w/o TXT and VMX disabled */
2429 if (!(msr & FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX)
2430 && !tboot_enabled())
2431 return 1;
cafd6659
SW		 2432 }
2433
2434 return 0;
6aa8b732
AK		 2435}
2436
7725b894
DX		 2437static void kvm_cpu_vmxon(u64 addr)
2438{
2439 asm volatile (ASM_VMX_VMXON_RAX
2440 : : "a"(&addr), "m"(addr)
2441 : "memory", "cc");
2442}
2443
10474ae8 2444static int hardware_enable(void *garbage)
6aa8b732
AK		 2445{
2446 int cpu = raw_smp_processor_id();
2447 u64 phys_addr = __pa(per_cpu(vmxarea, cpu));
cafd6659 2448 u64 old, test_bits;
6aa8b732 2449
10474ae8
AG		 2450 if (read_cr4() & X86_CR4_VMXE)
2451 return -EBUSY;
2452
d462b819 2453 INIT_LIST_HEAD(&per_cpu(loaded_vmcss_on_cpu, cpu));
8f536b76
ZY		 2454
2455 /*
2456 * Now we can enable the vmclear operation in kdump
2457 * since the loaded_vmcss_on_cpu list on this cpu
2458 * has been initialized.
2459 *
2460 * Though the cpu is not in VMX operation now, there
2461 * is no problem to enable the vmclear operation
2462 * for the loaded_vmcss_on_cpu list is empty!
2463 */
2464 crash_enable_local_vmclear(cpu);
2465
6aa8b732 2466 rdmsrl(MSR_IA32_FEATURE_CONTROL, old);
cafd6659
SW		 2467
2468 test_bits = FEATURE_CONTROL_LOCKED;
2469 test_bits |= FEATURE_CONTROL_VMXON_ENABLED_OUTSIDE_SMX;
2470 if (tboot_enabled())
2471 test_bits |= FEATURE_CONTROL_VMXON_ENABLED_INSIDE_SMX;
2472
2473 if ((old & test_bits) != test_bits) {
6aa8b732 2474 /* enable and lock */
cafd6659
SW		 2475 wrmsrl(MSR_IA32_FEATURE_CONTROL, old | test_bits);
2476 }
66aee91a 2477 write_cr4(read_cr4() | X86_CR4_VMXE); /* FIXME: not cpu hotplug safe */
10474ae8 2478
4610c9cc
DX		 2479 if (vmm_exclusive) {
2480 kvm_cpu_vmxon(phys_addr);
2481 ept_sync_global();
2482 }
10474ae8 2483
3444d7da
AK		 2484 store_gdt(&__get_cpu_var(host_gdt));
2485
10474ae8 2486 return 0;
6aa8b732
AK		 2487}
2488
d462b819 2489static void vmclear_local_loaded_vmcss(void)
543e4243
AK		 2490{
2491 int cpu = raw_smp_processor_id();
d462b819 2492 struct loaded_vmcs *v, *n;
543e4243 2493
d462b819
NHE		 2494 list_for_each_entry_safe(v, n, &per_cpu(loaded_vmcss_on_cpu, cpu),
2495 loaded_vmcss_on_cpu_link)
2496 __loaded_vmcs_clear(v);
543e4243
AK		 2497}
2498
710ff4a8
EH		 2499
2500/* Just like cpu_vmxoff(), but with the __kvm_handle_fault_on_reboot()
2501 * tricks.
2502 */
2503static void kvm_cpu_vmxoff(void)
6aa8b732 2504{
4ecac3fd 2505 asm volatile (__ex(ASM_VMX_VMXOFF) : : : "cc");
6aa8b732
AK		 2506}
2507
710ff4a8
EH		 2508static void hardware_disable(void *garbage)
2509{
4610c9cc 2510 if (vmm_exclusive) {
d462b819 2511 vmclear_local_loaded_vmcss();
4610c9cc
DX		 2512 kvm_cpu_vmxoff();
2513 }
7725b894 2514 write_cr4(read_cr4() & ~X86_CR4_VMXE);
710ff4a8
EH		 2515}
2516
1c3d14fe 2517static __init int adjust_vmx_controls(u32 ctl_min, u32 ctl_opt,
d77c26fc 2518 u32 msr, u32 *result)
1c3d14fe
YS		 2519{
2520 u32 vmx_msr_low, vmx_msr_high;
2521 u32 ctl = ctl_min | ctl_opt;
2522
2523 rdmsr(msr, vmx_msr_low, vmx_msr_high);
2524
2525 ctl &= vmx_msr_high; /* bit == 0 in high word ==> must be zero */
2526 ctl |= vmx_msr_low; /* bit == 1 in low word ==> must be one */
2527
2528 /* Ensure minimum (required) set of control bits are supported. */
2529 if (ctl_min & ~ctl)
002c7f7c 2530 return -EIO;
1c3d14fe
YS		 2531
2532 *result = ctl;
2533 return 0;
2534}
2535
110312c8
AK		 2536static __init bool allow_1_setting(u32 msr, u32 ctl)
2537{
2538 u32 vmx_msr_low, vmx_msr_high;
2539
2540 rdmsr(msr, vmx_msr_low, vmx_msr_high);
2541 return vmx_msr_high & ctl;
2542}
2543
002c7f7c 2544static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf)
6aa8b732
AK		 2545{
2546 u32 vmx_msr_low, vmx_msr_high;
d56f546d 2547 u32 min, opt, min2, opt2;
1c3d14fe
YS		 2548 u32 _pin_based_exec_control = 0;
2549 u32 _cpu_based_exec_control = 0;
f78e0e2e 2550 u32 _cpu_based_2nd_exec_control = 0;
1c3d14fe
YS		 2551 u32 _vmexit_control = 0;
2552 u32 _vmentry_control = 0;
2553
2554 min = PIN_BASED_EXT_INTR_MASK | PIN_BASED_NMI_EXITING;
f08864b4 2555 opt = PIN_BASED_VIRTUAL_NMIS;
1c3d14fe
YS		 2556 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PINBASED_CTLS,
2557 &_pin_based_exec_control) < 0)
002c7f7c 2558 return -EIO;
1c3d14fe 2559
10166744 2560 min = CPU_BASED_HLT_EXITING |
1c3d14fe
YS		 2561#ifdef CONFIG_X86_64
2562 CPU_BASED_CR8_LOAD_EXITING |
2563 CPU_BASED_CR8_STORE_EXITING |
2564#endif
d56f546d
SY		 2565 CPU_BASED_CR3_LOAD_EXITING |
2566 CPU_BASED_CR3_STORE_EXITING |
1c3d14fe
YS		 2567 CPU_BASED_USE_IO_BITMAPS |
2568 CPU_BASED_MOV_DR_EXITING |
a7052897 2569 CPU_BASED_USE_TSC_OFFSETING |
59708670
SY		 2570 CPU_BASED_MWAIT_EXITING |
2571 CPU_BASED_MONITOR_EXITING |
fee84b07
AK		 2572 CPU_BASED_INVLPG_EXITING |
2573 CPU_BASED_RDPMC_EXITING;
443381a8 2574
f78e0e2e 2575 opt = CPU_BASED_TPR_SHADOW |
25c5f225 2576 CPU_BASED_USE_MSR_BITMAPS |
f78e0e2e 2577 CPU_BASED_ACTIVATE_SECONDARY_CONTROLS;
1c3d14fe
YS		 2578 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS,
2579 &_cpu_based_exec_control) < 0)
002c7f7c 2580 return -EIO;
6e5d865c
YS		 2581#ifdef CONFIG_X86_64
2582 if ((_cpu_based_exec_control & CPU_BASED_TPR_SHADOW))
2583 _cpu_based_exec_control &= ~CPU_BASED_CR8_LOAD_EXITING &
2584 ~CPU_BASED_CR8_STORE_EXITING;
2585#endif
f78e0e2e 2586 if (_cpu_based_exec_control & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) {
d56f546d
SY		 2587 min2 = 0;
2588 opt2 = SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES |
8d14695f 2589 SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE |
2384d2b3 2590 SECONDARY_EXEC_WBINVD_EXITING |
d56f546d 2591 SECONDARY_EXEC_ENABLE_VPID |
3a624e29 2592 SECONDARY_EXEC_ENABLE_EPT |
4b8d54f9 2593 SECONDARY_EXEC_UNRESTRICTED_GUEST |
4e47c7a6 2594 SECONDARY_EXEC_PAUSE_LOOP_EXITING |
ad756a16 2595 SECONDARY_EXEC_RDTSCP |
83d4c286 2596 SECONDARY_EXEC_ENABLE_INVPCID |
c7c9c56c
YZ		 2597 SECONDARY_EXEC_APIC_REGISTER_VIRT |
2598 SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY;
d56f546d
SY		 2599 if (adjust_vmx_controls(min2, opt2,
2600 MSR_IA32_VMX_PROCBASED_CTLS2,
f78e0e2e
SY		 2601 &_cpu_based_2nd_exec_control) < 0)
2602 return -EIO;
2603 }
2604#ifndef CONFIG_X86_64
2605 if (!(_cpu_based_2nd_exec_control &
2606 SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES))
2607 _cpu_based_exec_control &= ~CPU_BASED_TPR_SHADOW;
2608#endif
83d4c286
YZ		 2609
2610 if (!(_cpu_based_exec_control & CPU_BASED_TPR_SHADOW))
2611 _cpu_based_2nd_exec_control &= ~(
8d14695f 2612 SECONDARY_EXEC_APIC_REGISTER_VIRT |
c7c9c56c
YZ		 2613 SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE |
2614 SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY);
83d4c286 2615
d56f546d 2616 if (_cpu_based_2nd_exec_control & SECONDARY_EXEC_ENABLE_EPT) {
a7052897
MT		 2617 /* CR3 accesses and invlpg don't need to cause VM Exits when EPT
2618 enabled */
5fff7d27
GN		 2619 _cpu_based_exec_control &= ~(CPU_BASED_CR3_LOAD_EXITING |
2620 CPU_BASED_CR3_STORE_EXITING |
2621 CPU_BASED_INVLPG_EXITING);
d56f546d
SY		 2622 rdmsr(MSR_IA32_VMX_EPT_VPID_CAP,
2623 vmx_capability.ept, vmx_capability.vpid);
2624 }
1c3d14fe
YS		 2625
2626 min = 0;
2627#ifdef CONFIG_X86_64
2628 min |= VM_EXIT_HOST_ADDR_SPACE_SIZE;
2629#endif
468d472f 2630 opt = VM_EXIT_SAVE_IA32_PAT | VM_EXIT_LOAD_IA32_PAT;
1c3d14fe
YS		 2631 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_EXIT_CTLS,
2632 &_vmexit_control) < 0)
002c7f7c 2633 return -EIO;
1c3d14fe 2634
468d472f
SY		 2635 min = 0;
2636 opt = VM_ENTRY_LOAD_IA32_PAT;
1c3d14fe
YS		 2637 if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_ENTRY_CTLS,
2638 &_vmentry_control) < 0)
002c7f7c 2639 return -EIO;
6aa8b732 2640
c68876fd 2641 rdmsr(MSR_IA32_VMX_BASIC, vmx_msr_low, vmx_msr_high);
1c3d14fe
YS		 2642
2643 /* IA-32 SDM Vol 3B: VMCS size is never greater than 4kB. */
2644 if ((vmx_msr_high & 0x1fff) > PAGE_SIZE)
002c7f7c 2645 return -EIO;
1c3d14fe
YS		 2646
2647#ifdef CONFIG_X86_64
2648 /* IA-32 SDM Vol 3B: 64-bit CPUs always have VMX_BASIC_MSR[48]==0. */
2649 if (vmx_msr_high & (1u<<16))
002c7f7c 2650 return -EIO;
1c3d14fe
YS		 2651#endif
2652
2653 /* Require Write-Back (WB) memory type for VMCS accesses. */
2654 if (((vmx_msr_high >> 18) & 15) != 6)
002c7f7c 2655 return -EIO;
1c3d14fe 2656
002c7f7c
YS		 2657 vmcs_conf->size = vmx_msr_high & 0x1fff;
2658 vmcs_conf->order = get_order(vmcs_config.size);
2659 vmcs_conf->revision_id = vmx_msr_low;
1c3d14fe 2660
002c7f7c
YS		 2661 vmcs_conf->pin_based_exec_ctrl = _pin_based_exec_control;
2662 vmcs_conf->cpu_based_exec_ctrl = _cpu_based_exec_control;
f78e0e2e 2663 vmcs_conf->cpu_based_2nd_exec_ctrl = _cpu_based_2nd_exec_control;
002c7f7c
YS		 2664 vmcs_conf->vmexit_ctrl = _vmexit_control;
2665 vmcs_conf->vmentry_ctrl = _vmentry_control;
1c3d14fe 2666
110312c8
AK		 2667 cpu_has_load_ia32_efer =
2668 allow_1_setting(MSR_IA32_VMX_ENTRY_CTLS,
2669 VM_ENTRY_LOAD_IA32_EFER)
2670 && allow_1_setting(MSR_IA32_VMX_EXIT_CTLS,
2671 VM_EXIT_LOAD_IA32_EFER);
2672
8bf00a52
GN		 2673 cpu_has_load_perf_global_ctrl =
2674 allow_1_setting(MSR_IA32_VMX_ENTRY_CTLS,
2675 VM_ENTRY_LOAD_IA32_PERF_GLOBAL_CTRL)
2676 && allow_1_setting(MSR_IA32_VMX_EXIT_CTLS,
2677 VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL);
2678
2679 /*
2680 * Some cpus support VM_ENTRY_(LOAD|SAVE)_IA32_PERF_GLOBAL_CTRL
2681 * but due to arrata below it can't be used. Workaround is to use
2682 * msr load mechanism to switch IA32_PERF_GLOBAL_CTRL.
2683 *
2684 * VM Exit May Incorrectly Clear IA32_PERF_GLOBAL_CTRL [34:32]
2685 *
2686 * AAK155 (model 26)
2687 * AAP115 (model 30)
2688 * AAT100 (model 37)
2689 * BC86,AAY89,BD102 (model 44)
2690 * BA97 (model 46)
2691 *
2692 */
2693 if (cpu_has_load_perf_global_ctrl && boot_cpu_data.x86 == 0x6) {
2694 switch (boot_cpu_data.x86_model) {
2695 case 26:
2696 case 30:
2697 case 37:
2698 case 44:
2699 case 46:
2700 cpu_has_load_perf_global_ctrl = false;
2701 printk_once(KERN_WARNING"kvm: VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL "
2702 "does not work properly. Using workaround\n");
2703 break;
2704 default:
2705 break;
2706 }
2707 }
2708
1c3d14fe 2709 return 0;
c68876fd 2710}
6aa8b732
AK		 2711
2712static struct vmcs *alloc_vmcs_cpu(int cpu)
2713{
2714 int node = cpu_to_node(cpu);
2715 struct page *pages;
2716 struct vmcs *vmcs;
2717
6484eb3e 2718 pages = alloc_pages_exact_node(node, GFP_KERNEL, vmcs_config.order);
6aa8b732
AK		 2719 if (!pages)
2720 return NULL;
2721 vmcs = page_address(pages);
1c3d14fe
YS		 2722 memset(vmcs, 0, vmcs_config.size);
2723 vmcs->revision_id = vmcs_config.revision_id; /* vmcs revision id */
6aa8b732
AK		 2724 return vmcs;
2725}
2726
2727static struct vmcs *alloc_vmcs(void)
2728{
d3b2c338 2729 return alloc_vmcs_cpu(raw_smp_processor_id());
6aa8b732
AK		 2730}
2731
2732static void free_vmcs(struct vmcs *vmcs)
2733{
1c3d14fe 2734 free_pages((unsigned long)vmcs, vmcs_config.order);
6aa8b732
AK		 2735}
2736
d462b819
NHE		 2737/*
2738 * Free a VMCS, but before that VMCLEAR it on the CPU where it was last loaded
2739 */
2740static void free_loaded_vmcs(struct loaded_vmcs *loaded_vmcs)
2741{
2742 if (!loaded_vmcs->vmcs)
2743 return;
2744 loaded_vmcs_clear(loaded_vmcs);
2745 free_vmcs(loaded_vmcs->vmcs);
2746 loaded_vmcs->vmcs = NULL;
2747}
2748
39959588 2749static void free_kvm_area(void)
6aa8b732
AK		 2750{
2751 int cpu;
2752
3230bb47 2753 for_each_possible_cpu(cpu) {
6aa8b732 2754 free_vmcs(per_cpu(vmxarea, cpu));
3230bb47
ZA		 2755 per_cpu(vmxarea, cpu) = NULL;
2756 }
6aa8b732
AK		 2757}
2758
6aa8b732
AK		 2759static __init int alloc_kvm_area(void)
2760{
2761 int cpu;
2762
3230bb47 2763 for_each_possible_cpu(cpu) {
6aa8b732
AK		 2764 struct vmcs *vmcs;
2765
2766 vmcs = alloc_vmcs_cpu(cpu);
2767 if (!vmcs) {
2768 free_kvm_area();
2769 return -ENOMEM;
2770 }
2771
2772 per_cpu(vmxarea, cpu) = vmcs;
2773 }
2774 return 0;
2775}
2776
2777static __init int hardware_setup(void)
2778{
002c7f7c
YS		 2779 if (setup_vmcs_config(&vmcs_config) < 0)
2780 return -EIO;
50a37eb4
JR		 2781
2782 if (boot_cpu_has(X86_FEATURE_NX))
2783 kvm_enable_efer_bits(EFER_NX);
2784
93ba03c2
SY		 2785 if (!cpu_has_vmx_vpid())
2786 enable_vpid = 0;
2787
4bc9b982
SY		 2788 if (!cpu_has_vmx_ept() ||
2789 !cpu_has_vmx_ept_4levels()) {
93ba03c2 2790 enable_ept = 0;
3a624e29 2791 enable_unrestricted_guest = 0;
83c3a331 2792 enable_ept_ad_bits = 0;
3a624e29
NK		 2793 }
2794
83c3a331
XH		 2795 if (!cpu_has_vmx_ept_ad_bits())
2796 enable_ept_ad_bits = 0;
2797
3a624e29
NK		 2798 if (!cpu_has_vmx_unrestricted_guest())
2799 enable_unrestricted_guest = 0;
93ba03c2
SY		 2800
2801 if (!cpu_has_vmx_flexpriority())
2802 flexpriority_enabled = 0;
2803
95ba8273
GN		 2804 if (!cpu_has_vmx_tpr_shadow())
2805 kvm_x86_ops->update_cr8_intercept = NULL;
2806
54dee993
MT		 2807 if (enable_ept && !cpu_has_vmx_ept_2m_page())
2808 kvm_disable_largepages();
2809
4b8d54f9
ZE		 2810 if (!cpu_has_vmx_ple())
2811 ple_gap = 0;
2812
c7c9c56c
YZ		 2813 if (!cpu_has_vmx_apic_register_virt() ||
2814 !cpu_has_vmx_virtual_intr_delivery())
2815 enable_apicv_reg_vid = 0;
2816
2817 if (enable_apicv_reg_vid)
2818 kvm_x86_ops->update_cr8_intercept = NULL;
2819 else
2820 kvm_x86_ops->hwapic_irr_update = NULL;
83d4c286 2821
b87a51ae
NHE		 2822 if (nested)
2823 nested_vmx_setup_ctls_msrs();
2824
6aa8b732
AK		 2825 return alloc_kvm_area();
2826}
2827
2828static __exit void hardware_unsetup(void)
2829{
2830 free_kvm_area();
2831}
2832
14168786
GN		 2833static bool emulation_required(struct kvm_vcpu *vcpu)
2834{
2835 return emulate_invalid_guest_state && !guest_state_valid(vcpu);
2836}
2837
91b0aa2c 2838static void fix_pmode_seg(struct kvm_vcpu *vcpu, int seg,
d99e4152 2839 struct kvm_segment *save)
6aa8b732 2840{
d99e4152
GN		 2841 if (!emulate_invalid_guest_state) {
2842 /*
2843 * CS and SS RPL should be equal during guest entry according
2844 * to VMX spec, but in reality it is not always so. Since vcpu
2845 * is in the middle of the transition from real mode to
2846 * protected mode it is safe to assume that RPL 0 is a good
2847 * default value.
2848 */
2849 if (seg == VCPU_SREG_CS || seg == VCPU_SREG_SS)
2850 save->selector &= ~SELECTOR_RPL_MASK;
2851 save->dpl = save->selector & SELECTOR_RPL_MASK;
2852 save->s = 1;
6aa8b732 2853 }
d99e4152 2854 vmx_set_segment(vcpu, save, seg);
6aa8b732
AK		 2855}
2856
2857static void enter_pmode(struct kvm_vcpu *vcpu)
2858{
2859 unsigned long flags;
a89a8fb9 2860 struct vcpu_vmx *vmx = to_vmx(vcpu);
6aa8b732 2861
d99e4152
GN		 2862 /*
2863 * Update real mode segment cache. It may be not up-to-date if sement
2864 * register was written while vcpu was in a guest mode.
2865 */
2866 vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_ES], VCPU_SREG_ES);
2867 vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_DS], VCPU_SREG_DS);
2868 vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_FS], VCPU_SREG_FS);
2869 vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_GS], VCPU_SREG_GS);
2870 vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_SS], VCPU_SREG_SS);
2871 vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_CS], VCPU_SREG_CS);
2872
7ffd92c5 2873 vmx->rmode.vm86_active = 0;
6aa8b732 2874
2fb92db1
AK		 2875 vmx_segment_cache_clear(vmx);
2876
f5f7b2fe 2877 vmx_set_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_TR], VCPU_SREG_TR);
6aa8b732
AK		 2878
2879 flags = vmcs_readl(GUEST_RFLAGS);
78ac8b47
AK		 2880 flags &= RMODE_GUEST_OWNED_EFLAGS_BITS;
2881 flags |= vmx->rmode.save_rflags & ~RMODE_GUEST_OWNED_EFLAGS_BITS;
6aa8b732
AK		 2882 vmcs_writel(GUEST_RFLAGS, flags);
2883
66aee91a
RR		 2884 vmcs_writel(GUEST_CR4, (vmcs_readl(GUEST_CR4) & ~X86_CR4_VME) |
2885 (vmcs_readl(CR4_READ_SHADOW) & X86_CR4_VME));
6aa8b732
AK		 2886
2887 update_exception_bitmap(vcpu);
2888
91b0aa2c
GN		 2889 fix_pmode_seg(vcpu, VCPU_SREG_CS, &vmx->rmode.segs[VCPU_SREG_CS]);
2890 fix_pmode_seg(vcpu, VCPU_SREG_SS, &vmx->rmode.segs[VCPU_SREG_SS]);
2891 fix_pmode_seg(vcpu, VCPU_SREG_ES, &vmx->rmode.segs[VCPU_SREG_ES]);
2892 fix_pmode_seg(vcpu, VCPU_SREG_DS, &vmx->rmode.segs[VCPU_SREG_DS]);
2893 fix_pmode_seg(vcpu, VCPU_SREG_FS, &vmx->rmode.segs[VCPU_SREG_FS]);
2894 fix_pmode_seg(vcpu, VCPU_SREG_GS, &vmx->rmode.segs[VCPU_SREG_GS]);
1f3141e8
GN		 2895
2896 /* CPL is always 0 when CPU enters protected mode */
2897 __set_bit(VCPU_EXREG_CPL, (ulong *)&vcpu->arch.regs_avail);
2898 vmx->cpl = 0;
6aa8b732
AK		 2899}
2900
d77c26fc 2901static gva_t rmode_tss_base(struct kvm *kvm)
6aa8b732 2902{
bfc6d222 2903 if (!kvm->arch.tss_addr) {
bc6678a3 2904 struct kvm_memslots *slots;
28a37544 2905 struct kvm_memory_slot *slot;
bc6678a3
MT		 2906 gfn_t base_gfn;
2907
90d83dc3 2908 slots = kvm_memslots(kvm);
28a37544
XG		 2909 slot = id_to_memslot(slots, 0);
2910 base_gfn = slot->base_gfn + slot->npages - 3;
2911
cbc94022
IE		 2912 return base_gfn << PAGE_SHIFT;
2913 }
bfc6d222 2914 return kvm->arch.tss_addr;
6aa8b732
AK		 2915}
2916
f5f7b2fe 2917static void fix_rmode_seg(int seg, struct kvm_segment *save)
6aa8b732 2918{
772e0318 2919 const struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
d99e4152
GN		 2920 struct kvm_segment var = *save;
2921
2922 var.dpl = 0x3;
2923 if (seg == VCPU_SREG_CS)
2924 var.type = 0x3;
2925
2926 if (!emulate_invalid_guest_state) {
2927 var.selector = var.base >> 4;
2928 var.base = var.base & 0xffff0;
2929 var.limit = 0xffff;
2930 var.g = 0;
2931 var.db = 0;
2932 var.present = 1;
2933 var.s = 1;
2934 var.l = 0;
2935 var.unusable = 0;
2936 var.type = 0x3;
2937 var.avl = 0;
2938 if (save->base & 0xf)
2939 printk_once(KERN_WARNING "kvm: segment base is not "
2940 "paragraph aligned when entering "
2941 "protected mode (seg=%d)", seg);
2942 }
6aa8b732 2943
d99e4152
GN		 2944 vmcs_write16(sf->selector, var.selector);
2945 vmcs_write32(sf->base, var.base);
2946 vmcs_write32(sf->limit, var.limit);
2947 vmcs_write32(sf->ar_bytes, vmx_segment_access_rights(&var));
6aa8b732
AK		 2948}
2949
2950static void enter_rmode(struct kvm_vcpu *vcpu)
2951{
2952 unsigned long flags;
a89a8fb9 2953 struct vcpu_vmx *vmx = to_vmx(vcpu);
6aa8b732 2954
f5f7b2fe
AK		 2955 vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_TR], VCPU_SREG_TR);
2956 vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_ES], VCPU_SREG_ES);
2957 vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_DS], VCPU_SREG_DS);
2958 vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_FS], VCPU_SREG_FS);
2959 vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_GS], VCPU_SREG_GS);
c6ad1153
GN		 2960 vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_SS], VCPU_SREG_SS);
2961 vmx_get_segment(vcpu, &vmx->rmode.segs[VCPU_SREG_CS], VCPU_SREG_CS);
f5f7b2fe 2962
7ffd92c5 2963 vmx->rmode.vm86_active = 1;
6aa8b732 2964
776e58ea
GN		 2965 /*
2966 * Very old userspace does not call KVM_SET_TSS_ADDR before entering
2967 * vcpu. Call it here with phys address pointing 16M below 4G.
2968 */
2969 if (!vcpu->kvm->arch.tss_addr) {
2970 printk_once(KERN_WARNING "kvm: KVM_SET_TSS_ADDR need to be "
2971 "called before entering vcpu\n");
2972 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
2973 vmx_set_tss_addr(vcpu->kvm, 0xfeffd000);
2974 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
2975 }
2976
2fb92db1
AK		 2977 vmx_segment_cache_clear(vmx);
2978
6aa8b732 2979 vmcs_writel(GUEST_TR_BASE, rmode_tss_base(vcpu->kvm));
6aa8b732 2980 vmcs_write32(GUEST_TR_LIMIT, RMODE_TSS_SIZE - 1);
6aa8b732
AK		 2981 vmcs_write32(GUEST_TR_AR_BYTES, 0x008b);
2982
2983 flags = vmcs_readl(GUEST_RFLAGS);
78ac8b47 2984 vmx->rmode.save_rflags = flags;
6aa8b732 2985
053de044 2986 flags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM;
6aa8b732
AK		 2987
2988 vmcs_writel(GUEST_RFLAGS, flags);
66aee91a 2989 vmcs_writel(GUEST_CR4, vmcs_readl(GUEST_CR4) | X86_CR4_VME);
6aa8b732
AK		 2990 update_exception_bitmap(vcpu);
2991
d99e4152
GN		 2992 fix_rmode_seg(VCPU_SREG_SS, &vmx->rmode.segs[VCPU_SREG_SS]);
2993 fix_rmode_seg(VCPU_SREG_CS, &vmx->rmode.segs[VCPU_SREG_CS]);
2994 fix_rmode_seg(VCPU_SREG_ES, &vmx->rmode.segs[VCPU_SREG_ES]);
2995 fix_rmode_seg(VCPU_SREG_DS, &vmx->rmode.segs[VCPU_SREG_DS]);
2996 fix_rmode_seg(VCPU_SREG_GS, &vmx->rmode.segs[VCPU_SREG_GS]);
2997 fix_rmode_seg(VCPU_SREG_FS, &vmx->rmode.segs[VCPU_SREG_FS]);
b246dd5d 2998
8668a3c4 2999 kvm_mmu_reset_context(vcpu);
6aa8b732
AK		 3000}
3001
401d10de
AS		 3002static void vmx_set_efer(struct kvm_vcpu *vcpu, u64 efer)
3003{
3004 struct vcpu_vmx *vmx = to_vmx(vcpu);
26bb0981
AK		 3005 struct shared_msr_entry *msr = find_msr_entry(vmx, MSR_EFER);
3006
3007 if (!msr)
3008 return;
401d10de 3009
44ea2b17
AK		 3010 /*
3011 * Force kernel_gs_base reloading before EFER changes, as control
3012 * of this msr depends on is_long_mode().
3013 */
3014 vmx_load_host_state(to_vmx(vcpu));
f6801dff 3015 vcpu->arch.efer = efer;
401d10de
AS		 3016 if (efer & EFER_LMA) {
3017 vmcs_write32(VM_ENTRY_CONTROLS,
3018 vmcs_read32(VM_ENTRY_CONTROLS) |
3019 VM_ENTRY_IA32E_MODE);
3020 msr->data = efer;
3021 } else {
3022 vmcs_write32(VM_ENTRY_CONTROLS,
3023 vmcs_read32(VM_ENTRY_CONTROLS) &
3024 ~VM_ENTRY_IA32E_MODE);
3025
3026 msr->data = efer & ~EFER_LME;
3027 }
3028 setup_msrs(vmx);
3029}
3030
05b3e0c2 3031#ifdef CONFIG_X86_64
6aa8b732
AK		 3032
3033static void enter_lmode(struct kvm_vcpu *vcpu)
3034{
3035 u32 guest_tr_ar;
3036
2fb92db1
AK		 3037 vmx_segment_cache_clear(to_vmx(vcpu));
3038
6aa8b732
AK		 3039 guest_tr_ar = vmcs_read32(GUEST_TR_AR_BYTES);
3040 if ((guest_tr_ar & AR_TYPE_MASK) != AR_TYPE_BUSY_64_TSS) {
bd80158a
JK		 3041 pr_debug_ratelimited("%s: tss fixup for long mode. \n",
3042 __func__);
6aa8b732
AK		 3043 vmcs_write32(GUEST_TR_AR_BYTES,
3044 (guest_tr_ar & ~AR_TYPE_MASK)
3045 | AR_TYPE_BUSY_64_TSS);
3046 }
da38f438 3047 vmx_set_efer(vcpu, vcpu->arch.efer | EFER_LMA);
6aa8b732
AK		 3048}
3049
3050static void exit_lmode(struct kvm_vcpu *vcpu)
3051{
6aa8b732
AK		 3052 vmcs_write32(VM_ENTRY_CONTROLS,
3053 vmcs_read32(VM_ENTRY_CONTROLS)
1e4e6e00 3054 & ~VM_ENTRY_IA32E_MODE);
da38f438 3055 vmx_set_efer(vcpu, vcpu->arch.efer & ~EFER_LMA);
6aa8b732
AK		 3056}
3057
3058#endif
3059
2384d2b3
SY		 3060static void vmx_flush_tlb(struct kvm_vcpu *vcpu)
3061{
b9d762fa 3062 vpid_sync_context(to_vmx(vcpu));
dd180b3e
XG		 3063 if (enable_ept) {
3064 if (!VALID_PAGE(vcpu->arch.mmu.root_hpa))
3065 return;
4e1096d2 3066 ept_sync_context(construct_eptp(vcpu->arch.mmu.root_hpa));
dd180b3e 3067 }
2384d2b3
SY		 3068}
3069
e8467fda
AK		 3070static void vmx_decache_cr0_guest_bits(struct kvm_vcpu *vcpu)
3071{
3072 ulong cr0_guest_owned_bits = vcpu->arch.cr0_guest_owned_bits;
3073
3074 vcpu->arch.cr0 &= ~cr0_guest_owned_bits;
3075 vcpu->arch.cr0 |= vmcs_readl(GUEST_CR0) & cr0_guest_owned_bits;
3076}
3077
aff48baa
AK		 3078static void vmx_decache_cr3(struct kvm_vcpu *vcpu)
3079{
3080 if (enable_ept && is_paging(vcpu))
3081 vcpu->arch.cr3 = vmcs_readl(GUEST_CR3);
3082 __set_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail);
3083}
3084
25c4c276 3085static void vmx_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
399badf3 3086{
fc78f519
AK		 3087 ulong cr4_guest_owned_bits = vcpu->arch.cr4_guest_owned_bits;
3088
3089 vcpu->arch.cr4 &= ~cr4_guest_owned_bits;
3090 vcpu->arch.cr4 |= vmcs_readl(GUEST_CR4) & cr4_guest_owned_bits;
399badf3
AK		 3091}
3092
1439442c
SY		 3093static void ept_load_pdptrs(struct kvm_vcpu *vcpu)
3094{
6de4f3ad
AK		 3095 if (!test_bit(VCPU_EXREG_PDPTR,
3096 (unsigned long *)&vcpu->arch.regs_dirty))
3097 return;
3098
1439442c 3099 if (is_paging(vcpu) && is_pae(vcpu) && !is_long_mode(vcpu)) {
ff03a073
JR		 3100 vmcs_write64(GUEST_PDPTR0, vcpu->arch.mmu.pdptrs[0]);
3101 vmcs_write64(GUEST_PDPTR1, vcpu->arch.mmu.pdptrs[1]);
3102 vmcs_write64(GUEST_PDPTR2, vcpu->arch.mmu.pdptrs[2]);
3103 vmcs_write64(GUEST_PDPTR3, vcpu->arch.mmu.pdptrs[3]);
1439442c
SY		 3104 }
3105}
3106
8f5d549f
AK		 3107static void ept_save_pdptrs(struct kvm_vcpu *vcpu)
3108{
3109 if (is_paging(vcpu) && is_pae(vcpu) && !is_long_mode(vcpu)) {
ff03a073
JR		 3110 vcpu->arch.mmu.pdptrs[0] = vmcs_read64(GUEST_PDPTR0);
3111 vcpu->arch.mmu.pdptrs[1] = vmcs_read64(GUEST_PDPTR1);
3112 vcpu->arch.mmu.pdptrs[2] = vmcs_read64(GUEST_PDPTR2);
3113 vcpu->arch.mmu.pdptrs[3] = vmcs_read64(GUEST_PDPTR3);
8f5d549f 3114 }
6de4f3ad
AK		 3115
3116 __set_bit(VCPU_EXREG_PDPTR,
3117 (unsigned long *)&vcpu->arch.regs_avail);
3118 __set_bit(VCPU_EXREG_PDPTR,
3119 (unsigned long *)&vcpu->arch.regs_dirty);
8f5d549f
AK		 3120}
3121
5e1746d6 3122static int vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4);
1439442c
SY		 3123
3124static void ept_update_paging_mode_cr0(unsigned long *hw_cr0,
3125 unsigned long cr0,
3126 struct kvm_vcpu *vcpu)
3127{
5233dd51
MT		 3128 if (!test_bit(VCPU_EXREG_CR3, (ulong *)&vcpu->arch.regs_avail))
3129 vmx_decache_cr3(vcpu);
1439442c
SY		 3130 if (!(cr0 & X86_CR0_PG)) {
3131 /* From paging/starting to nonpaging */
3132 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL,
65267ea1 3133 vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) |
1439442c
SY		 3134 (CPU_BASED_CR3_LOAD_EXITING |
3135 CPU_BASED_CR3_STORE_EXITING));
3136 vcpu->arch.cr0 = cr0;
fc78f519 3137 vmx_set_cr4(vcpu, kvm_read_cr4(vcpu));
1439442c
SY		 3138 } else if (!is_paging(vcpu)) {
3139 /* From nonpaging to paging */
3140 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL,
65267ea1 3141 vmcs_read32(CPU_BASED_VM_EXEC_CONTROL) &
1439442c
SY		 3142 ~(CPU_BASED_CR3_LOAD_EXITING |
3143 CPU_BASED_CR3_STORE_EXITING));
3144 vcpu->arch.cr0 = cr0;
fc78f519 3145 vmx_set_cr4(vcpu, kvm_read_cr4(vcpu));
1439442c 3146 }
95eb84a7
SY		 3147
3148 if (!(cr0 & X86_CR0_WP))
3149 *hw_cr0 &= ~X86_CR0_WP;
1439442c
SY		 3150}
3151
6aa8b732
AK		 3152static void vmx_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
3153{
7ffd92c5 3154 struct vcpu_vmx *vmx = to_vmx(vcpu);
3a624e29
NK		 3155 unsigned long hw_cr0;
3156
5037878e 3157 hw_cr0 = (cr0 & ~KVM_GUEST_CR0_MASK);
3a624e29 3158 if (enable_unrestricted_guest)
5037878e 3159 hw_cr0 |= KVM_VM_CR0_ALWAYS_ON_UNRESTRICTED_GUEST;
218e763f 3160 else {
5037878e 3161 hw_cr0 |= KVM_VM_CR0_ALWAYS_ON;
1439442c 3162
218e763f
GN		 3163 if (vmx->rmode.vm86_active && (cr0 & X86_CR0_PE))
3164 enter_pmode(vcpu);
6aa8b732 3165
218e763f
GN		 3166 if (!vmx->rmode.vm86_active && !(cr0 & X86_CR0_PE))
3167 enter_rmode(vcpu);
3168 }
6aa8b732 3169
05b3e0c2 3170#ifdef CONFIG_X86_64
f6801dff 3171 if (vcpu->arch.efer & EFER_LME) {
707d92fa 3172 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG))
6aa8b732 3173 enter_lmode(vcpu);
707d92fa 3174 if (is_paging(vcpu) && !(cr0 & X86_CR0_PG))
6aa8b732
AK		 3175 exit_lmode(vcpu);
3176 }
3177#endif
3178
089d034e 3179 if (enable_ept)
1439442c
SY		 3180 ept_update_paging_mode_cr0(&hw_cr0, cr0, vcpu);
3181
02daab21 3182 if (!vcpu->fpu_active)
81231c69 3183 hw_cr0 |= X86_CR0_TS | X86_CR0_MP;
02daab21 3184
6aa8b732 3185 vmcs_writel(CR0_READ_SHADOW, cr0);
1439442c 3186 vmcs_writel(GUEST_CR0, hw_cr0);
ad312c7c 3187 vcpu->arch.cr0 = cr0;
14168786
GN		 3188
3189 /* depends on vcpu->arch.cr0 to be set to a new value */
3190 vmx->emulation_required = emulation_required(vcpu);
6aa8b732
AK		 3191}
3192
1439442c
SY		 3193static u64 construct_eptp(unsigned long root_hpa)
3194{
3195 u64 eptp;
3196
3197 /* TODO write the value reading from MSR */
3198 eptp = VMX_EPT_DEFAULT_MT |
3199 VMX_EPT_DEFAULT_GAW << VMX_EPT_GAW_EPTP_SHIFT;
b38f9934
XH		 3200 if (enable_ept_ad_bits)
3201 eptp |= VMX_EPT_AD_ENABLE_BIT;
1439442c
SY		 3202 eptp |= (root_hpa & PAGE_MASK);
3203
3204 return eptp;
3205}
3206
6aa8b732
AK		 3207static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
3208{
1439442c
SY		 3209 unsigned long guest_cr3;
3210 u64 eptp;
3211
3212 guest_cr3 = cr3;
089d034e 3213 if (enable_ept) {
1439442c
SY		 3214 eptp = construct_eptp(cr3);
3215 vmcs_write64(EPT_POINTER, eptp);
9f8fe504 3216 guest_cr3 = is_paging(vcpu) ? kvm_read_cr3(vcpu) :
b927a3ce 3217 vcpu->kvm->arch.ept_identity_map_addr;
7c93be44 3218 ept_load_pdptrs(vcpu);
1439442c
SY		 3219 }
3220
2384d2b3 3221 vmx_flush_tlb(vcpu);
1439442c 3222 vmcs_writel(GUEST_CR3, guest_cr3);
6aa8b732
AK		 3223}
3224
5e1746d6 3225static int vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
6aa8b732 3226{
7ffd92c5 3227 unsigned long hw_cr4 = cr4 | (to_vmx(vcpu)->rmode.vm86_active ?
1439442c
SY		 3228 KVM_RMODE_VM_CR4_ALWAYS_ON : KVM_PMODE_VM_CR4_ALWAYS_ON);
3229
5e1746d6
NHE		 3230 if (cr4 & X86_CR4_VMXE) {
3231 /*
3232 * To use VMXON (and later other VMX instructions), a guest
3233 * must first be able to turn on cr4.VMXE (see handle_vmon()).
3234 * So basically the check on whether to allow nested VMX
3235 * is here.
3236 */
3237 if (!nested_vmx_allowed(vcpu))
3238 return 1;
1a0d74e6
JK		 3239 }
3240 if (to_vmx(vcpu)->nested.vmxon &&
3241 ((cr4 & VMXON_CR4_ALWAYSON) != VMXON_CR4_ALWAYSON))
5e1746d6
NHE		 3242 return 1;
3243
ad312c7c 3244 vcpu->arch.cr4 = cr4;
bc23008b
AK		 3245 if (enable_ept) {
3246 if (!is_paging(vcpu)) {
3247 hw_cr4 &= ~X86_CR4_PAE;
3248 hw_cr4 |= X86_CR4_PSE;
c08800a5
DX		 3249 /*
3250 * SMEP is disabled if CPU is in non-paging mode in
3251 * hardware. However KVM always uses paging mode to
3252 * emulate guest non-paging mode with TDP.
3253 * To emulate this behavior, SMEP needs to be manually
3254 * disabled when guest switches to non-paging mode.
3255 */
3256 hw_cr4 &= ~X86_CR4_SMEP;
bc23008b
AK		 3257 } else if (!(cr4 & X86_CR4_PAE)) {
3258 hw_cr4 &= ~X86_CR4_PAE;
3259 }
3260 }
1439442c
SY		 3261
3262 vmcs_writel(CR4_READ_SHADOW, cr4);
3263 vmcs_writel(GUEST_CR4, hw_cr4);
5e1746d6 3264 return 0;
6aa8b732
AK		 3265}
3266
6aa8b732
AK		 3267static void vmx_get_segment(struct kvm_vcpu *vcpu,
3268 struct kvm_segment *var, int seg)
3269{
a9179499 3270 struct vcpu_vmx *vmx = to_vmx(vcpu);
6aa8b732
AK		 3271 u32 ar;
3272
c6ad1153 3273 if (vmx->rmode.vm86_active && seg != VCPU_SREG_LDTR) {
f5f7b2fe 3274 *var = vmx->rmode.segs[seg];
a9179499 3275 if (seg == VCPU_SREG_TR
2fb92db1 3276 || var->selector == vmx_read_guest_seg_selector(vmx, seg))
f5f7b2fe 3277 return;
1390a28b
AK		 3278 var->base = vmx_read_guest_seg_base(vmx, seg);
3279 var->selector = vmx_read_guest_seg_selector(vmx, seg);
3280 return;
a9179499 3281 }
2fb92db1
AK		 3282 var->base = vmx_read_guest_seg_base(vmx, seg);
3283 var->limit = vmx_read_guest_seg_limit(vmx, seg);
3284 var->selector = vmx_read_guest_seg_selector(vmx, seg);
3285 ar = vmx_read_guest_seg_ar(vmx, seg);
6aa8b732
AK		 3286 var->type = ar & 15;
3287 var->s = (ar >> 4) & 1;
3288 var->dpl = (ar >> 5) & 3;
3289 var->present = (ar >> 7) & 1;
3290 var->avl = (ar >> 12) & 1;
3291 var->l = (ar >> 13) & 1;
3292 var->db = (ar >> 14) & 1;
3293 var->g = (ar >> 15) & 1;
3294 var->unusable = (ar >> 16) & 1;
3295}
3296
a9179499
AK		 3297static u64 vmx_get_segment_base(struct kvm_vcpu *vcpu, int seg)
3298{
a9179499
AK		 3299 struct kvm_segment s;
3300
3301 if (to_vmx(vcpu)->rmode.vm86_active) {
3302 vmx_get_segment(vcpu, &s, seg);
3303 return s.base;
3304 }
2fb92db1 3305 return vmx_read_guest_seg_base(to_vmx(vcpu), seg);
a9179499
AK		 3306}
3307
b09408d0 3308static int vmx_get_cpl(struct kvm_vcpu *vcpu)
2e4d2653 3309{
b09408d0
MT		 3310 struct vcpu_vmx *vmx = to_vmx(vcpu);
3311
3eeb3288 3312 if (!is_protmode(vcpu))
2e4d2653
IE		 3313 return 0;
3314
f4c63e5d
AK		 3315 if (!is_long_mode(vcpu)
3316 && (kvm_get_rflags(vcpu) & X86_EFLAGS_VM)) /* if virtual 8086 */
2e4d2653
IE		 3317 return 3;
3318
69c73028
AK		 3319 if (!test_bit(VCPU_EXREG_CPL, (ulong *)&vcpu->arch.regs_avail)) {
3320 __set_bit(VCPU_EXREG_CPL, (ulong *)&vcpu->arch.regs_avail);
b09408d0 3321 vmx->cpl = vmx_read_guest_seg_selector(vmx, VCPU_SREG_CS) & 3;
69c73028 3322 }
d881e6f6
AK		 3323
3324 return vmx->cpl;
69c73028
AK		 3325}
3326
3327
653e3108 3328static u32 vmx_segment_access_rights(struct kvm_segment *var)
6aa8b732 3329{
6aa8b732
AK		 3330 u32 ar;
3331
f0495f9b 3332 if (var->unusable || !var->present)
6aa8b732
AK		 3333 ar = 1 << 16;
3334 else {
3335 ar = var->type & 15;
3336 ar |= (var->s & 1) << 4;
3337 ar |= (var->dpl & 3) << 5;
3338 ar |= (var->present & 1) << 7;
3339 ar |= (var->avl & 1) << 12;
3340 ar |= (var->l & 1) << 13;
3341 ar |= (var->db & 1) << 14;
3342 ar |= (var->g & 1) << 15;
3343 }
653e3108
AK		 3344
3345 return ar;
3346}
3347
3348static void vmx_set_segment(struct kvm_vcpu *vcpu,
3349 struct kvm_segment *var, int seg)
3350{
7ffd92c5 3351 struct vcpu_vmx *vmx = to_vmx(vcpu);
772e0318 3352 const struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
653e3108 3353
2fb92db1 3354 vmx_segment_cache_clear(vmx);
2f143240
GN		 3355 if (seg == VCPU_SREG_CS)
3356 __clear_bit(VCPU_EXREG_CPL, (ulong *)&vcpu->arch.regs_avail);
2fb92db1 3357
1ecd50a9
GN		 3358 if (vmx->rmode.vm86_active && seg != VCPU_SREG_LDTR) {
3359 vmx->rmode.segs[seg] = *var;
3360 if (seg == VCPU_SREG_TR)
3361 vmcs_write16(sf->selector, var->selector);
3362 else if (var->s)
3363 fix_rmode_seg(seg, &vmx->rmode.segs[seg]);
d99e4152 3364 goto out;
653e3108 3365 }
1ecd50a9 3366
653e3108
AK		 3367 vmcs_writel(sf->base, var->base);
3368 vmcs_write32(sf->limit, var->limit);
3369 vmcs_write16(sf->selector, var->selector);
3a624e29
NK		 3370
3371 /*
3372 * Fix the "Accessed" bit in AR field of segment registers for older
3373 * qemu binaries.
3374 * IA32 arch specifies that at the time of processor reset the
3375 * "Accessed" bit in the AR field of segment registers is 1. And qemu
0fa06071 3376 * is setting it to 0 in the userland code. This causes invalid guest
3a624e29
NK		 3377 * state vmexit when "unrestricted guest" mode is turned on.
3378 * Fix for this setup issue in cpu_reset is being pushed in the qemu
3379 * tree. Newer qemu binaries with that qemu fix would not need this
3380 * kvm hack.
3381 */
3382 if (enable_unrestricted_guest && (seg != VCPU_SREG_LDTR))
f924d66d 3383 var->type |= 0x1; /* Accessed */
3a624e29 3384
f924d66d 3385 vmcs_write32(sf->ar_bytes, vmx_segment_access_rights(var));
d99e4152
GN		 3386
3387out:
14168786 3388 vmx->emulation_required |= emulation_required(vcpu);
6aa8b732
AK		 3389}
3390
6aa8b732
AK		 3391static void vmx_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
3392{
2fb92db1 3393 u32 ar = vmx_read_guest_seg_ar(to_vmx(vcpu), VCPU_SREG_CS);
6aa8b732
AK		 3394
3395 *db = (ar >> 14) & 1;
3396 *l = (ar >> 13) & 1;
3397}
3398
89a27f4d 3399static void vmx_get_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
6aa8b732 3400{
89a27f4d
GN		 3401 dt->size = vmcs_read32(GUEST_IDTR_LIMIT);
3402 dt->address = vmcs_readl(GUEST_IDTR_BASE);
6aa8b732
AK		 3403}
3404
89a27f4d 3405static void vmx_set_idt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
6aa8b732 3406{
89a27f4d
GN		 3407 vmcs_write32(GUEST_IDTR_LIMIT, dt->size);
3408 vmcs_writel(GUEST_IDTR_BASE, dt->address);
6aa8b732
AK		 3409}
3410
89a27f4d 3411static void vmx_get_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
6aa8b732 3412{
89a27f4d
GN		 3413 dt->size = vmcs_read32(GUEST_GDTR_LIMIT);
3414 dt->address = vmcs_readl(GUEST_GDTR_BASE);
6aa8b732
AK		 3415}
3416
89a27f4d 3417static void vmx_set_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
6aa8b732 3418{
89a27f4d
GN		 3419 vmcs_write32(GUEST_GDTR_LIMIT, dt->size);
3420 vmcs_writel(GUEST_GDTR_BASE, dt->address);
6aa8b732
AK		 3421}
3422
648dfaa7
MG		 3423static bool rmode_segment_valid(struct kvm_vcpu *vcpu, int seg)
3424{
3425 struct kvm_segment var;
3426 u32 ar;
3427
3428 vmx_get_segment(vcpu, &var, seg);
07f42f5f 3429 var.dpl = 0x3;
0647f4aa
GN		 3430 if (seg == VCPU_SREG_CS)
3431 var.type = 0x3;
648dfaa7
MG		 3432 ar = vmx_segment_access_rights(&var);
3433
3434 if (var.base != (var.selector << 4))
3435 return false;
89efbed0 3436 if (var.limit != 0xffff)
648dfaa7 3437 return false;
07f42f5f 3438 if (ar != 0xf3)
648dfaa7
MG		 3439 return false;
3440
3441 return true;
3442}
3443
3444static bool code_segment_valid(struct kvm_vcpu *vcpu)
3445{
3446 struct kvm_segment cs;
3447 unsigned int cs_rpl;
3448
3449 vmx_get_segment(vcpu, &cs, VCPU_SREG_CS);
3450 cs_rpl = cs.selector & SELECTOR_RPL_MASK;
3451
1872a3f4
AK		 3452 if (cs.unusable)
3453 return false;
648dfaa7
MG		 3454 if (~cs.type & (AR_TYPE_CODE_MASK|AR_TYPE_ACCESSES_MASK))
3455 return false;
3456 if (!cs.s)
3457 return false;
1872a3f4 3458 if (cs.type & AR_TYPE_WRITEABLE_MASK) {
648dfaa7
MG		 3459 if (cs.dpl > cs_rpl)
3460 return false;
1872a3f4 3461 } else {
648dfaa7
MG		 3462 if (cs.dpl != cs_rpl)
3463 return false;
3464 }
3465 if (!cs.present)
3466 return false;
3467
3468 /* TODO: Add Reserved field check, this'll require a new member in the kvm_segment_field structure */
3469 return true;
3470}
3471
3472static bool stack_segment_valid(struct kvm_vcpu *vcpu)
3473{
3474 struct kvm_segment ss;
3475 unsigned int ss_rpl;
3476
3477 vmx_get_segment(vcpu, &ss, VCPU_SREG_SS);
3478 ss_rpl = ss.selector & SELECTOR_RPL_MASK;
3479
1872a3f4
AK		 3480 if (ss.unusable)
3481 return true;
3482 if (ss.type != 3 && ss.type != 7)
648dfaa7
MG		 3483 return false;
3484 if (!ss.s)
3485 return false;
3486 if (ss.dpl != ss_rpl) /* DPL != RPL */
3487 return false;
3488 if (!ss.present)
3489 return false;
3490
3491 return true;
3492}
3493
3494static bool data_segment_valid(struct kvm_vcpu *vcpu, int seg)
3495{
3496 struct kvm_segment var;
3497 unsigned int rpl;
3498
3499 vmx_get_segment(vcpu, &var, seg);
3500 rpl = var.selector & SELECTOR_RPL_MASK;
3501
1872a3f4
AK		 3502 if (var.unusable)
3503 return true;
648dfaa7
MG		 3504 if (!var.s)
3505 return false;
3506 if (!var.present)
3507 return false;
3508 if (~var.type & (AR_TYPE_CODE_MASK|AR_TYPE_WRITEABLE_MASK)) {
3509 if (var.dpl < rpl) /* DPL < RPL */
3510 return false;
3511 }
3512
3513 /* TODO: Add other members to kvm_segment_field to allow checking for other access
3514 * rights flags
3515 */
3516 return true;
3517}
3518
3519static bool tr_valid(struct kvm_vcpu *vcpu)
3520{
3521 struct kvm_segment tr;
3522
3523 vmx_get_segment(vcpu, &tr, VCPU_SREG_TR);
3524
1872a3f4
AK		 3525 if (tr.unusable)
3526 return false;
648dfaa7
MG		 3527 if (tr.selector & SELECTOR_TI_MASK) /* TI = 1 */
3528 return false;
1872a3f4 3529 if (tr.type != 3 && tr.type != 11) /* TODO: Check if guest is in IA32e mode */
648dfaa7
MG		 3530 return false;
3531 if (!tr.present)
3532 return false;
3533
3534 return true;
3535}
3536
3537static bool ldtr_valid(struct kvm_vcpu *vcpu)
3538{
3539 struct kvm_segment ldtr;
3540
3541 vmx_get_segment(vcpu, &ldtr, VCPU_SREG_LDTR);
3542
1872a3f4
AK		 3543 if (ldtr.unusable)
3544 return true;
648dfaa7
MG		 3545 if (ldtr.selector & SELECTOR_TI_MASK) /* TI = 1 */
3546 return false;
3547 if (ldtr.type != 2)
3548 return false;
3549 if (!ldtr.present)
3550 return false;
3551
3552 return true;
3553}
3554
3555static bool cs_ss_rpl_check(struct kvm_vcpu *vcpu)
3556{
3557 struct kvm_segment cs, ss;
3558
3559 vmx_get_segment(vcpu, &cs, VCPU_SREG_CS);
3560 vmx_get_segment(vcpu, &ss, VCPU_SREG_SS);
3561
3562 return ((cs.selector & SELECTOR_RPL_MASK) ==
3563 (ss.selector & SELECTOR_RPL_MASK));
3564}
3565
3566/*
3567 * Check if guest state is valid. Returns true if valid, false if
3568 * not.
3569 * We assume that registers are always usable
3570 */
3571static bool guest_state_valid(struct kvm_vcpu *vcpu)
3572{
c5e97c80
GN		 3573 if (enable_unrestricted_guest)
3574 return true;
3575
648dfaa7 3576 /* real mode guest state checks */
3eeb3288 3577 if (!is_protmode(vcpu)) {
648dfaa7
MG		 3578 if (!rmode_segment_valid(vcpu, VCPU_SREG_CS))
3579 return false;
3580 if (!rmode_segment_valid(vcpu, VCPU_SREG_SS))
3581 return false;
3582 if (!rmode_segment_valid(vcpu, VCPU_SREG_DS))
3583 return false;
3584 if (!rmode_segment_valid(vcpu, VCPU_SREG_ES))
3585 return false;
3586 if (!rmode_segment_valid(vcpu, VCPU_SREG_FS))
3587 return false;
3588 if (!rmode_segment_valid(vcpu, VCPU_SREG_GS))
3589 return false;
3590 } else {
3591 /* protected mode guest state checks */
3592 if (!cs_ss_rpl_check(vcpu))
3593 return false;
3594 if (!code_segment_valid(vcpu))
3595 return false;
3596 if (!stack_segment_valid(vcpu))
3597 return false;
3598 if (!data_segment_valid(vcpu, VCPU_SREG_DS))
3599 return false;
3600 if (!data_segment_valid(vcpu, VCPU_SREG_ES))
3601 return false;
3602 if (!data_segment_valid(vcpu, VCPU_SREG_FS))
3603 return false;
3604 if (!data_segment_valid(vcpu, VCPU_SREG_GS))
3605 return false;
3606 if (!tr_valid(vcpu))
3607 return false;
3608 if (!ldtr_valid(vcpu))
3609 return false;
3610 }
3611 /* TODO:
3612 * - Add checks on RIP
3613 * - Add checks on RFLAGS
3614 */
3615
3616 return true;
3617}
3618
d77c26fc 3619static int init_rmode_tss(struct kvm *kvm)
6aa8b732 3620{
40dcaa9f 3621 gfn_t fn;
195aefde 3622 u16 data = 0;
40dcaa9f 3623 int r, idx, ret = 0;
6aa8b732 3624
40dcaa9f
XG		 3625 idx = srcu_read_lock(&kvm->srcu);
3626 fn = rmode_tss_base(kvm) >> PAGE_SHIFT;
195aefde
IE		 3627 r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE);
3628 if (r < 0)
10589a46 3629 goto out;
195aefde 3630 data = TSS_BASE_SIZE + TSS_REDIRECTION_SIZE;
464d17c8
SY		 3631 r = kvm_write_guest_page(kvm, fn++, &data,
3632 TSS_IOPB_BASE_OFFSET, sizeof(u16));
195aefde 3633 if (r < 0)
10589a46 3634 goto out;
195aefde
IE		 3635 r = kvm_clear_guest_page(kvm, fn++, 0, PAGE_SIZE);
3636 if (r < 0)
10589a46 3637 goto out;
195aefde
IE		 3638 r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE);
3639 if (r < 0)
10589a46 3640 goto out;
195aefde 3641 data = ~0;
10589a46
MT		 3642 r = kvm_write_guest_page(kvm, fn, &data,
3643 RMODE_TSS_SIZE - 2 * PAGE_SIZE - 1,
3644 sizeof(u8));
195aefde 3645 if (r < 0)
10589a46
MT		 3646 goto out;
3647
3648 ret = 1;
3649out:
40dcaa9f 3650 srcu_read_unlock(&kvm->srcu, idx);
10589a46 3651 return ret;
6aa8b732
AK		 3652}
3653
b7ebfb05
SY		 3654static int init_rmode_identity_map(struct kvm *kvm)
3655{
40dcaa9f 3656 int i, idx, r, ret;
b7ebfb05
SY		 3657 pfn_t identity_map_pfn;
3658 u32 tmp;
3659
089d034e 3660 if (!enable_ept)
b7ebfb05
SY		 3661 return 1;
3662 if (unlikely(!kvm->arch.ept_identity_pagetable)) {
3663 printk(KERN_ERR "EPT: identity-mapping pagetable "
3664 "haven't been allocated!\n");
3665 return 0;
3666 }
3667 if (likely(kvm->arch.ept_identity_pagetable_done))
3668 return 1;
3669 ret = 0;
b927a3ce 3670 identity_map_pfn = kvm->arch.ept_identity_map_addr >> PAGE_SHIFT;
40dcaa9f 3671 idx = srcu_read_lock(&kvm->srcu);
b7ebfb05
SY		 3672 r = kvm_clear_guest_page(kvm, identity_map_pfn, 0, PAGE_SIZE);
3673 if (r < 0)
3674 goto out;
3675 /* Set up identity-mapping pagetable for EPT in real mode */
3676 for (i = 0; i < PT32_ENT_PER_PAGE; i++) {
3677 tmp = (i << 22) + (_PAGE_PRESENT | _PAGE_RW | _PAGE_USER |
3678 _PAGE_ACCESSED | _PAGE_DIRTY | _PAGE_PSE);
3679 r = kvm_write_guest_page(kvm, identity_map_pfn,
3680 &tmp, i * sizeof(tmp), sizeof(tmp));
3681 if (r < 0)
3682 goto out;
3683 }
3684 kvm->arch.ept_identity_pagetable_done = true;
3685 ret = 1;
3686out:
40dcaa9f 3687 srcu_read_unlock(&kvm->srcu, idx);
b7ebfb05
SY		 3688 return ret;
3689}
3690
6aa8b732
AK		 3691static void seg_setup(int seg)
3692{
772e0318 3693 const struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
3a624e29 3694 unsigned int ar;
6aa8b732
AK		 3695
3696 vmcs_write16(sf->selector, 0);
3697 vmcs_writel(sf->base, 0);
3698 vmcs_write32(sf->limit, 0xffff);
d54d07b2
GN		 3699 ar = 0x93;
3700 if (seg == VCPU_SREG_CS)
3701 ar |= 0x08; /* code segment */
3a624e29
NK		 3702
3703 vmcs_write32(sf->ar_bytes, ar);
6aa8b732
AK		 3704}
3705
f78e0e2e
SY		 3706static int alloc_apic_access_page(struct kvm *kvm)
3707{
4484141a 3708 struct page *page;
f78e0e2e
SY		 3709 struct kvm_userspace_memory_region kvm_userspace_mem;
3710 int r = 0;
3711
79fac95e 3712 mutex_lock(&kvm->slots_lock);
bfc6d222 3713 if (kvm->arch.apic_access_page)
f78e0e2e
SY		 3714 goto out;
3715 kvm_userspace_mem.slot = APIC_ACCESS_PAGE_PRIVATE_MEMSLOT;
3716 kvm_userspace_mem.flags = 0;
3717 kvm_userspace_mem.guest_phys_addr = 0xfee00000ULL;
3718 kvm_userspace_mem.memory_size = PAGE_SIZE;
47ae31e2 3719 r = __kvm_set_memory_region(kvm, &kvm_userspace_mem);
f78e0e2e
SY		 3720 if (r)
3721 goto out;
72dc67a6 3722
4484141a
XG		 3723 page = gfn_to_page(kvm, 0xfee00);
3724 if (is_error_page(page)) {
3725 r = -EFAULT;
3726 goto out;
3727 }
3728
3729 kvm->arch.apic_access_page = page;
f78e0e2e 3730out:
79fac95e 3731 mutex_unlock(&kvm->slots_lock);
f78e0e2e
SY		 3732 return r;
3733}
3734
b7ebfb05
SY		 3735static int alloc_identity_pagetable(struct kvm *kvm)
3736{
4484141a 3737 struct page *page;
b7ebfb05
SY		 3738 struct kvm_userspace_memory_region kvm_userspace_mem;
3739 int r = 0;
3740
79fac95e 3741 mutex_lock(&kvm->slots_lock);
b7ebfb05
SY		 3742 if (kvm->arch.ept_identity_pagetable)
3743 goto out;
3744 kvm_userspace_mem.slot = IDENTITY_PAGETABLE_PRIVATE_MEMSLOT;
3745 kvm_userspace_mem.flags = 0;
b927a3ce
SY		 3746 kvm_userspace_mem.guest_phys_addr =
3747 kvm->arch.ept_identity_map_addr;
b7ebfb05 3748 kvm_userspace_mem.memory_size = PAGE_SIZE;
47ae31e2 3749 r = __kvm_set_memory_region(kvm, &kvm_userspace_mem);
b7ebfb05
SY		 3750 if (r)
3751 goto out;
3752
4484141a
XG		 3753 page = gfn_to_page(kvm, kvm->arch.ept_identity_map_addr >> PAGE_SHIFT);
3754 if (is_error_page(page)) {
3755 r = -EFAULT;
3756 goto out;
3757 }
3758
3759 kvm->arch.ept_identity_pagetable = page;
b7ebfb05 3760out:
79fac95e 3761 mutex_unlock(&kvm->slots_lock);
b7ebfb05
SY		 3762 return r;
3763}
3764
2384d2b3
SY		 3765static void allocate_vpid(struct vcpu_vmx *vmx)
3766{
3767 int vpid;
3768
3769 vmx->vpid = 0;
919818ab 3770 if (!enable_vpid)
2384d2b3
SY		 3771 return;
3772 spin_lock(&vmx_vpid_lock);
3773 vpid = find_first_zero_bit(vmx_vpid_bitmap, VMX_NR_VPIDS);
3774 if (vpid < VMX_NR_VPIDS) {
3775 vmx->vpid = vpid;
3776 __set_bit(vpid, vmx_vpid_bitmap);
3777 }
3778 spin_unlock(&vmx_vpid_lock);
3779}
3780
cdbecfc3
LJ		 3781static void free_vpid(struct vcpu_vmx *vmx)
3782{
3783 if (!enable_vpid)
3784 return;
3785 spin_lock(&vmx_vpid_lock);
3786 if (vmx->vpid != 0)
3787 __clear_bit(vmx->vpid, vmx_vpid_bitmap);
3788 spin_unlock(&vmx_vpid_lock);
3789}
3790
8d14695f
YZ		 3791#define MSR_TYPE_R 1
3792#define MSR_TYPE_W 2
3793static void __vmx_disable_intercept_for_msr(unsigned long *msr_bitmap,
3794 u32 msr, int type)
25c5f225 3795{
3e7c73e9 3796 int f = sizeof(unsigned long);
25c5f225
SY		 3797
3798 if (!cpu_has_vmx_msr_bitmap())
3799 return;
3800
3801 /*
3802 * See Intel PRM Vol. 3, 20.6.9 (MSR-Bitmap Address). Early manuals
3803 * have the write-low and read-high bitmap offsets the wrong way round.
3804 * We can control MSRs 0x00000000-0x00001fff and 0xc0000000-0xc0001fff.
3805 */
25c5f225 3806 if (msr <= 0x1fff) {
8d14695f
YZ		 3807 if (type & MSR_TYPE_R)
3808 /* read-low */
3809 __clear_bit(msr, msr_bitmap + 0x000 / f);
3810
3811 if (type & MSR_TYPE_W)
3812 /* write-low */
3813 __clear_bit(msr, msr_bitmap + 0x800 / f);
3814
25c5f225
SY		 3815 } else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff)) {
3816 msr &= 0x1fff;
8d14695f
YZ		 3817 if (type & MSR_TYPE_R)
3818 /* read-high */
3819 __clear_bit(msr, msr_bitmap + 0x400 / f);
3820
3821 if (type & MSR_TYPE_W)
3822 /* write-high */
3823 __clear_bit(msr, msr_bitmap + 0xc00 / f);
3824
3825 }
3826}
3827
3828static void __vmx_enable_intercept_for_msr(unsigned long *msr_bitmap,
3829 u32 msr, int type)
3830{
3831 int f = sizeof(unsigned long);
3832
3833 if (!cpu_has_vmx_msr_bitmap())
3834 return;
3835
3836 /*
3837 * See Intel PRM Vol. 3, 20.6.9 (MSR-Bitmap Address). Early manuals
3838 * have the write-low and read-high bitmap offsets the wrong way round.
3839 * We can control MSRs 0x00000000-0x00001fff and 0xc0000000-0xc0001fff.
3840 */
3841 if (msr <= 0x1fff) {
3842 if (type & MSR_TYPE_R)
3843 /* read-low */
3844 __set_bit(msr, msr_bitmap + 0x000 / f);
3845
3846 if (type & MSR_TYPE_W)
3847 /* write-low */
3848 __set_bit(msr, msr_bitmap + 0x800 / f);
3849
3850 } else if ((msr >= 0xc0000000) && (msr <= 0xc0001fff)) {
3851 msr &= 0x1fff;
3852 if (type & MSR_TYPE_R)
3853 /* read-high */
3854 __set_bit(msr, msr_bitmap + 0x400 / f);
3855
3856 if (type & MSR_TYPE_W)
3857 /* write-high */
3858 __set_bit(msr, msr_bitmap + 0xc00 / f);
3859
25c5f225 3860 }
25c5f225
SY		 3861}
3862
5897297b
AK		 3863static void vmx_disable_intercept_for_msr(u32 msr, bool longmode_only)
3864{
3865 if (!longmode_only)
8d14695f
YZ		 3866 __vmx_disable_intercept_for_msr(vmx_msr_bitmap_legacy,
3867 msr, MSR_TYPE_R | MSR_TYPE_W);
3868 __vmx_disable_intercept_for_msr(vmx_msr_bitmap_longmode,
3869 msr, MSR_TYPE_R | MSR_TYPE_W);
3870}
3871
3872static void vmx_enable_intercept_msr_read_x2apic(u32 msr)
3873{
3874 __vmx_enable_intercept_for_msr(vmx_msr_bitmap_legacy_x2apic,
3875 msr, MSR_TYPE_R);
3876 __vmx_enable_intercept_for_msr(vmx_msr_bitmap_longmode_x2apic,
3877 msr, MSR_TYPE_R);
3878}
3879
3880static void vmx_disable_intercept_msr_read_x2apic(u32 msr)
3881{
3882 __vmx_disable_intercept_for_msr(vmx_msr_bitmap_legacy_x2apic,
3883 msr, MSR_TYPE_R);
3884 __vmx_disable_intercept_for_msr(vmx_msr_bitmap_longmode_x2apic,
3885 msr, MSR_TYPE_R);
3886}
3887
3888static void vmx_disable_intercept_msr_write_x2apic(u32 msr)
3889{
3890 __vmx_disable_intercept_for_msr(vmx_msr_bitmap_legacy_x2apic,
3891 msr, MSR_TYPE_W);
3892 __vmx_disable_intercept_for_msr(vmx_msr_bitmap_longmode_x2apic,
3893 msr, MSR_TYPE_W);
5897297b
AK		 3894}
3895
a3a8ff8e
NHE		 3896/*
3897 * Set up the vmcs's constant host-state fields, i.e., host-state fields that
3898 * will not change in the lifetime of the guest.
3899 * Note that host-state that does change is set elsewhere. E.g., host-state
3900 * that is set differently for each CPU is set in vmx_vcpu_load(), not here.
3901 */
3902static void vmx_set_constant_host_state(void)
3903{
3904 u32 low32, high32;
3905 unsigned long tmpl;
3906 struct desc_ptr dt;
3907
b1a74bf8 3908 vmcs_writel(HOST_CR0, read_cr0() & ~X86_CR0_TS); /* 22.2.3 */
a3a8ff8e
NHE		 3909 vmcs_writel(HOST_CR4, read_cr4()); /* 22.2.3, 22.2.5 */
3910 vmcs_writel(HOST_CR3, read_cr3()); /* 22.2.3 FIXME: shadow tables */
3911
3912 vmcs_write16(HOST_CS_SELECTOR, __KERNEL_CS); /* 22.2.4 */
b2da15ac
AK		 3913#ifdef CONFIG_X86_64
3914 /*
3915 * Load null selectors, so we can avoid reloading them in
3916 * __vmx_load_host_state(), in case userspace uses the null selectors
3917 * too (the expected case).
3918 */
3919 vmcs_write16(HOST_DS_SELECTOR, 0);
3920 vmcs_write16(HOST_ES_SELECTOR, 0);
3921#else
a3a8ff8e
NHE		 3922 vmcs_write16(HOST_DS_SELECTOR, __KERNEL_DS); /* 22.2.4 */
3923 vmcs_write16(HOST_ES_SELECTOR, __KERNEL_DS); /* 22.2.4 */
b2da15ac 3924#endif
a3a8ff8e
NHE		 3925 vmcs_write16(HOST_SS_SELECTOR, __KERNEL_DS); /* 22.2.4 */
3926 vmcs_write16(HOST_TR_SELECTOR, GDT_ENTRY_TSS*8); /* 22.2.4 */
3927
3928 native_store_idt(&dt);
3929 vmcs_writel(HOST_IDTR_BASE, dt.address); /* 22.2.4 */
3930
83287ea4 3931 vmcs_writel(HOST_RIP, vmx_return); /* 22.2.5 */
a3a8ff8e
NHE		 3932
3933 rdmsr(MSR_IA32_SYSENTER_CS, low32, high32);
3934 vmcs_write32(HOST_IA32_SYSENTER_CS, low32);
3935 rdmsrl(MSR_IA32_SYSENTER_EIP, tmpl);
3936 vmcs_writel(HOST_IA32_SYSENTER_EIP, tmpl); /* 22.2.3 */
3937
3938 if (vmcs_config.vmexit_ctrl & VM_EXIT_LOAD_IA32_PAT) {
3939 rdmsr(MSR_IA32_CR_PAT, low32, high32);
3940 vmcs_write64(HOST_IA32_PAT, low32 | ((u64) high32 << 32));
3941 }
3942}
3943
bf8179a0
NHE		 3944static void set_cr4_guest_host_mask(struct vcpu_vmx *vmx)
3945{
3946 vmx->vcpu.arch.cr4_guest_owned_bits = KVM_CR4_GUEST_OWNED_BITS;
3947 if (enable_ept)
3948 vmx->vcpu.arch.cr4_guest_owned_bits |= X86_CR4_PGE;
fe3ef05c
NHE		 3949 if (is_guest_mode(&vmx->vcpu))
3950 vmx->vcpu.arch.cr4_guest_owned_bits &=
3951 ~get_vmcs12(&vmx->vcpu)->cr4_guest_host_mask;
bf8179a0
NHE		 3952 vmcs_writel(CR4_GUEST_HOST_MASK, ~vmx->vcpu.arch.cr4_guest_owned_bits);
3953}
3954
3955static u32 vmx_exec_control(struct vcpu_vmx *vmx)
3956{
3957 u32 exec_control = vmcs_config.cpu_based_exec_ctrl;
3958 if (!vm_need_tpr_shadow(vmx->vcpu.kvm)) {
3959 exec_control &= ~CPU_BASED_TPR_SHADOW;
3960#ifdef CONFIG_X86_64
3961 exec_control |= CPU_BASED_CR8_STORE_EXITING |
3962 CPU_BASED_CR8_LOAD_EXITING;
3963#endif
3964 }
3965 if (!enable_ept)
3966 exec_control |= CPU_BASED_CR3_STORE_EXITING |
3967 CPU_BASED_CR3_LOAD_EXITING |
3968 CPU_BASED_INVLPG_EXITING;
3969 return exec_control;
3970}
3971
c7c9c56c
YZ		 3972static int vmx_vm_has_apicv(struct kvm *kvm)
3973{
3974 return enable_apicv_reg_vid && irqchip_in_kernel(kvm);
3975}
3976
bf8179a0
NHE		 3977static u32 vmx_secondary_exec_control(struct vcpu_vmx *vmx)
3978{
3979 u32 exec_control = vmcs_config.cpu_based_2nd_exec_ctrl;
3980 if (!vm_need_virtualize_apic_accesses(vmx->vcpu.kvm))
3981 exec_control &= ~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES;
3982 if (vmx->vpid == 0)
3983 exec_control &= ~SECONDARY_EXEC_ENABLE_VPID;
3984 if (!enable_ept) {
3985 exec_control &= ~SECONDARY_EXEC_ENABLE_EPT;
3986 enable_unrestricted_guest = 0;
ad756a16
MJ		 3987 /* Enable INVPCID for non-ept guests may cause performance regression. */
3988 exec_control &= ~SECONDARY_EXEC_ENABLE_INVPCID;
bf8179a0
NHE		 3989 }
3990 if (!enable_unrestricted_guest)
3991 exec_control &= ~SECONDARY_EXEC_UNRESTRICTED_GUEST;
3992 if (!ple_gap)
3993 exec_control &= ~SECONDARY_EXEC_PAUSE_LOOP_EXITING;
c7c9c56c
YZ		 3994 if (!vmx_vm_has_apicv(vmx->vcpu.kvm))
3995 exec_control &= ~(SECONDARY_EXEC_APIC_REGISTER_VIRT |
3996 SECONDARY_EXEC_VIRTUAL_INTR_DELIVERY);
8d14695f 3997 exec_control &= ~SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE;
bf8179a0
NHE		 3998 return exec_control;
3999}
4000
ce88decf
XG		 4001static void ept_set_mmio_spte_mask(void)
4002{
4003 /*
4004 * EPT Misconfigurations can be generated if the value of bits 2:0
4005 * of an EPT paging-structure entry is 110b (write/execute).
4006 * Also, magic bits (0xffull << 49) is set to quickly identify mmio
4007 * spte.
4008 */
4009 kvm_mmu_set_mmio_spte_mask(0xffull << 49 | 0x6ull);
4010}
4011
6aa8b732
AK		 4012/*
4013 * Sets up the vmcs for emulated real mode.
4014 */
8b9cf98c 4015static int vmx_vcpu_setup(struct vcpu_vmx *vmx)
6aa8b732 4016{
2e4ce7f5 4017#ifdef CONFIG_X86_64
6aa8b732 4018 unsigned long a;
2e4ce7f5 4019#endif
6aa8b732 4020 int i;
6aa8b732 4021
6aa8b732 4022 /* I/O */
3e7c73e9
AK		 4023 vmcs_write64(IO_BITMAP_A, __pa(vmx_io_bitmap_a));
4024 vmcs_write64(IO_BITMAP_B, __pa(vmx_io_bitmap_b));
6aa8b732 4025
25c5f225 4026 if (cpu_has_vmx_msr_bitmap())
5897297b 4027 vmcs_write64(MSR_BITMAP, __pa(vmx_msr_bitmap_legacy));
25c5f225 4028
6aa8b732
AK		 4029 vmcs_write64(VMCS_LINK_POINTER, -1ull); /* 22.3.1.5 */
4030
6aa8b732 4031 /* Control */
1c3d14fe
YS		 4032 vmcs_write32(PIN_BASED_VM_EXEC_CONTROL,
4033 vmcs_config.pin_based_exec_ctrl);
6e5d865c 4034
bf8179a0 4035 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, vmx_exec_control(vmx));
6aa8b732 4036
83ff3b9d 4037 if (cpu_has_secondary_exec_ctrls()) {
bf8179a0
NHE		 4038 vmcs_write32(SECONDARY_VM_EXEC_CONTROL,
4039 vmx_secondary_exec_control(vmx));
83ff3b9d 4040 }
f78e0e2e 4041
c7c9c56c
YZ		 4042 if (enable_apicv_reg_vid) {
4043 vmcs_write64(EOI_EXIT_BITMAP0, 0);
4044 vmcs_write64(EOI_EXIT_BITMAP1, 0);
4045 vmcs_write64(EOI_EXIT_BITMAP2, 0);
4046 vmcs_write64(EOI_EXIT_BITMAP3, 0);
4047
4048 vmcs_write16(GUEST_INTR_STATUS, 0);
4049 }
4050
4b8d54f9
ZE		 4051 if (ple_gap) {
4052 vmcs_write32(PLE_GAP, ple_gap);
4053 vmcs_write32(PLE_WINDOW, ple_window);
4054 }
4055
c3707958
XG		 4056 vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK, 0);
4057 vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH, 0);
6aa8b732
AK		 4058 vmcs_write32(CR3_TARGET_COUNT, 0); /* 22.2.1 */
4059
9581d442
AK		 4060 vmcs_write16(HOST_FS_SELECTOR, 0); /* 22.2.4 */
4061 vmcs_write16(HOST_GS_SELECTOR, 0); /* 22.2.4 */
a3a8ff8e 4062 vmx_set_constant_host_state();
05b3e0c2 4063#ifdef CONFIG_X86_64
6aa8b732
AK		 4064 rdmsrl(MSR_FS_BASE, a);
4065 vmcs_writel(HOST_FS_BASE, a); /* 22.2.4 */
4066 rdmsrl(MSR_GS_BASE, a);
4067 vmcs_writel(HOST_GS_BASE, a); /* 22.2.4 */
4068#else
4069 vmcs_writel(HOST_FS_BASE, 0); /* 22.2.4 */
4070 vmcs_writel(HOST_GS_BASE, 0); /* 22.2.4 */
4071#endif
4072
2cc51560
ED		 4073 vmcs_write32(VM_EXIT_MSR_STORE_COUNT, 0);
4074 vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, 0);
61d2ef2c 4075 vmcs_write64(VM_EXIT_MSR_LOAD_ADDR, __pa(vmx->msr_autoload.host));
2cc51560 4076 vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, 0);
61d2ef2c 4077 vmcs_write64(VM_ENTRY_MSR_LOAD_ADDR, __pa(vmx->msr_autoload.guest));
6aa8b732 4078
468d472f 4079 if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT) {
a3a8ff8e
NHE		 4080 u32 msr_low, msr_high;
4081 u64 host_pat;
468d472f
SY		 4082 rdmsr(MSR_IA32_CR_PAT, msr_low, msr_high);
4083 host_pat = msr_low | ((u64) msr_high << 32);
4084 /* Write the default value follow host pat */
4085 vmcs_write64(GUEST_IA32_PAT, host_pat);
4086 /* Keep arch.pat sync with GUEST_IA32_PAT */
4087 vmx->vcpu.arch.pat = host_pat;
4088 }
4089
6aa8b732
AK		 4090 for (i = 0; i < NR_VMX_MSR; ++i) {
4091 u32 index = vmx_msr_index[i];
4092 u32 data_low, data_high;
a2fa3e9f 4093 int j = vmx->nmsrs;
6aa8b732
AK		 4094
4095 if (rdmsr_safe(index, &data_low, &data_high) < 0)
4096 continue;
432bd6cb
AK		 4097 if (wrmsr_safe(index, data_low, data_high) < 0)
4098 continue;
26bb0981
AK		 4099 vmx->guest_msrs[j].index = i;
4100 vmx->guest_msrs[j].data = 0;
d5696725 4101 vmx->guest_msrs[j].mask = -1ull;
a2fa3e9f 4102 ++vmx->nmsrs;
6aa8b732 4103 }
6aa8b732 4104
1c3d14fe 4105 vmcs_write32(VM_EXIT_CONTROLS, vmcs_config.vmexit_ctrl);
6aa8b732
AK		 4106
4107 /* 22.2.1, 20.8.1 */
1c3d14fe
YS		 4108 vmcs_write32(VM_ENTRY_CONTROLS, vmcs_config.vmentry_ctrl);
4109
e00c8cf2 4110 vmcs_writel(CR0_GUEST_HOST_MASK, ~0UL);
bf8179a0 4111 set_cr4_guest_host_mask(vmx);
e00c8cf2
AK		 4112
4113 return 0;
4114}
4115
57f252f2 4116static void vmx_vcpu_reset(struct kvm_vcpu *vcpu)
e00c8cf2
AK		 4117{
4118 struct vcpu_vmx *vmx = to_vmx(vcpu);
4119 u64 msr;
e00c8cf2 4120
7ffd92c5 4121 vmx->rmode.vm86_active = 0;
e00c8cf2 4122
3b86cd99
JK		 4123 vmx->soft_vnmi_blocked = 0;
4124
ad312c7c 4125 vmx->vcpu.arch.regs[VCPU_REGS_RDX] = get_rdx_init_val();
2d3ad1f4 4126 kvm_set_cr8(&vmx->vcpu, 0);
e00c8cf2 4127 msr = 0xfee00000 | MSR_IA32_APICBASE_ENABLE;
c5af89b6 4128 if (kvm_vcpu_is_bsp(&vmx->vcpu))
e00c8cf2
AK		 4129 msr |= MSR_IA32_APICBASE_BSP;
4130 kvm_set_apic_base(&vmx->vcpu, msr);
4131
2fb92db1
AK		 4132 vmx_segment_cache_clear(vmx);
4133
5706be0d 4134 seg_setup(VCPU_SREG_CS);
66450a21 4135 vmcs_write16(GUEST_CS_SELECTOR, 0xf000);
e00c8cf2
AK		 4136
4137 seg_setup(VCPU_SREG_DS);
4138 seg_setup(VCPU_SREG_ES);
4139 seg_setup(VCPU_SREG_FS);
4140 seg_setup(VCPU_SREG_GS);
4141 seg_setup(VCPU_SREG_SS);
4142
4143 vmcs_write16(GUEST_TR_SELECTOR, 0);
4144 vmcs_writel(GUEST_TR_BASE, 0);
4145 vmcs_write32(GUEST_TR_LIMIT, 0xffff);
4146 vmcs_write32(GUEST_TR_AR_BYTES, 0x008b);
4147
4148 vmcs_write16(GUEST_LDTR_SELECTOR, 0);
4149 vmcs_writel(GUEST_LDTR_BASE, 0);
4150 vmcs_write32(GUEST_LDTR_LIMIT, 0xffff);
4151 vmcs_write32(GUEST_LDTR_AR_BYTES, 0x00082);
4152
4153 vmcs_write32(GUEST_SYSENTER_CS, 0);
4154 vmcs_writel(GUEST_SYSENTER_ESP, 0);
4155 vmcs_writel(GUEST_SYSENTER_EIP, 0);
4156
4157 vmcs_writel(GUEST_RFLAGS, 0x02);
66450a21 4158 kvm_rip_write(vcpu, 0xfff0);
e00c8cf2 4159
e00c8cf2
AK		 4160 vmcs_writel(GUEST_GDTR_BASE, 0);
4161 vmcs_write32(GUEST_GDTR_LIMIT, 0xffff);
4162
4163 vmcs_writel(GUEST_IDTR_BASE, 0);
4164 vmcs_write32(GUEST_IDTR_LIMIT, 0xffff);
4165
443381a8 4166 vmcs_write32(GUEST_ACTIVITY_STATE, GUEST_ACTIVITY_ACTIVE);
e00c8cf2
AK		 4167 vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, 0);
4168 vmcs_write32(GUEST_PENDING_DBG_EXCEPTIONS, 0);
4169
e00c8cf2
AK		 4170 /* Special registers */
4171 vmcs_write64(GUEST_IA32_DEBUGCTL, 0);
4172
4173 setup_msrs(vmx);
4174
6aa8b732
AK		 4175 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0); /* 22.2.1 */
4176
f78e0e2e
SY		 4177 if (cpu_has_vmx_tpr_shadow()) {
4178 vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, 0);
4179 if (vm_need_tpr_shadow(vmx->vcpu.kvm))
4180 vmcs_write64(VIRTUAL_APIC_PAGE_ADDR,
afc20184 4181 __pa(vmx->vcpu.arch.apic->regs));
f78e0e2e
SY		 4182 vmcs_write32(TPR_THRESHOLD, 0);
4183 }
4184
4185 if (vm_need_virtualize_apic_accesses(vmx->vcpu.kvm))
4186 vmcs_write64(APIC_ACCESS_ADDR,
bfc6d222 4187 page_to_phys(vmx->vcpu.kvm->arch.apic_access_page));
6aa8b732 4188
2384d2b3
SY		 4189 if (vmx->vpid != 0)
4190 vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->vpid);
4191
fa40052c 4192 vmx->vcpu.arch.cr0 = X86_CR0_NW | X86_CR0_CD | X86_CR0_ET;
7a4f5ad0 4193 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
4d4ec087 4194 vmx_set_cr0(&vmx->vcpu, kvm_read_cr0(vcpu)); /* enter rmode */
7a4f5ad0 4195 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
8b9cf98c 4196 vmx_set_cr4(&vmx->vcpu, 0);
8b9cf98c 4197 vmx_set_efer(&vmx->vcpu, 0);
8b9cf98c
RR		 4198 vmx_fpu_activate(&vmx->vcpu);
4199 update_exception_bitmap(&vmx->vcpu);
6aa8b732 4200
b9d762fa 4201 vpid_sync_context(vmx);
6aa8b732
AK		 4202}
4203
b6f1250e
NHE		 4204/*
4205 * In nested virtualization, check if L1 asked to exit on external interrupts.
4206 * For most existing hypervisors, this will always return true.
4207 */
4208static bool nested_exit_on_intr(struct kvm_vcpu *vcpu)
4209{
4210 return get_vmcs12(vcpu)->pin_based_vm_exec_control &
4211 PIN_BASED_EXT_INTR_MASK;
4212}
4213
3b86cd99
JK		 4214static void enable_irq_window(struct kvm_vcpu *vcpu)
4215{
4216 u32 cpu_based_vm_exec_control;
d6185f20
NHE		 4217 if (is_guest_mode(vcpu) && nested_exit_on_intr(vcpu)) {
4218 /*
4219 * We get here if vmx_interrupt_allowed() said we can't
4220 * inject to L1 now because L2 must run. Ask L2 to exit
4221 * right after entry, so we can inject to L1 more promptly.
b6f1250e 4222 */
d6185f20 4223 kvm_make_request(KVM_REQ_IMMEDIATE_EXIT, vcpu);
b6f1250e 4224 return;
d6185f20 4225 }
3b86cd99
JK		 4226
4227 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
4228 cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING;
4229 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
4230}
4231
4232static void enable_nmi_window(struct kvm_vcpu *vcpu)
4233{
4234 u32 cpu_based_vm_exec_control;
4235
4236 if (!cpu_has_virtual_nmis()) {
4237 enable_irq_window(vcpu);
4238 return;
4239 }
4240
30bd0c4c
AK		 4241 if (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & GUEST_INTR_STATE_STI) {
4242 enable_irq_window(vcpu);
4243 return;
4244 }
3b86cd99
JK		 4245 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
4246 cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_NMI_PENDING;
4247 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
4248}
4249
66fd3f7f 4250static void vmx_inject_irq(struct kvm_vcpu *vcpu)
85f455f7 4251{
9c8cba37 4252 struct vcpu_vmx *vmx = to_vmx(vcpu);
66fd3f7f
GN		 4253 uint32_t intr;
4254 int irq = vcpu->arch.interrupt.nr;
9c8cba37 4255
229456fc 4256 trace_kvm_inj_virq(irq);
2714d1d3 4257
fa89a817 4258 ++vcpu->stat.irq_injections;
7ffd92c5 4259 if (vmx->rmode.vm86_active) {
71f9833b
SH		 4260 int inc_eip = 0;
4261 if (vcpu->arch.interrupt.soft)
4262 inc_eip = vcpu->arch.event_exit_inst_len;
4263 if (kvm_inject_realmode_interrupt(vcpu, irq, inc_eip) != EMULATE_DONE)
a92601bb 4264 kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu);
85f455f7
ED		 4265 return;
4266 }
66fd3f7f
GN		 4267 intr = irq | INTR_INFO_VALID_MASK;
4268 if (vcpu->arch.interrupt.soft) {
4269 intr |= INTR_TYPE_SOFT_INTR;
4270 vmcs_write32(VM_ENTRY_INSTRUCTION_LEN,
4271 vmx->vcpu.arch.event_exit_inst_len);
4272 } else
4273 intr |= INTR_TYPE_EXT_INTR;
4274 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, intr);
85f455f7
ED		 4275}
4276
f08864b4
SY		 4277static void vmx_inject_nmi(struct kvm_vcpu *vcpu)
4278{
66a5a347
JK		 4279 struct vcpu_vmx *vmx = to_vmx(vcpu);
4280
0b6ac343
NHE		 4281 if (is_guest_mode(vcpu))
4282 return;
4283
3b86cd99
JK		 4284 if (!cpu_has_virtual_nmis()) {
4285 /*
4286 * Tracking the NMI-blocked state in software is built upon
4287 * finding the next open IRQ window. This, in turn, depends on
4288 * well-behaving guests: They have to keep IRQs disabled at
4289 * least as long as the NMI handler runs. Otherwise we may
4290 * cause NMI nesting, maybe breaking the guest. But as this is
4291 * highly unlikely, we can live with the residual risk.
4292 */
4293 vmx->soft_vnmi_blocked = 1;
4294 vmx->vnmi_blocked_time = 0;
4295 }
4296
487b391d 4297 ++vcpu->stat.nmi_injections;
9d58b931 4298 vmx->nmi_known_unmasked = false;
7ffd92c5 4299 if (vmx->rmode.vm86_active) {
71f9833b 4300 if (kvm_inject_realmode_interrupt(vcpu, NMI_VECTOR, 0) != EMULATE_DONE)
a92601bb 4301 kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu);
66a5a347
JK		 4302 return;
4303 }
f08864b4
SY		 4304 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
4305 INTR_TYPE_NMI_INTR | INTR_INFO_VALID_MASK | NMI_VECTOR);
f08864b4
SY		 4306}
4307
c4282df9 4308static int vmx_nmi_allowed(struct kvm_vcpu *vcpu)
33f089ca 4309{
3b86cd99 4310 if (!cpu_has_virtual_nmis() && to_vmx(vcpu)->soft_vnmi_blocked)
c4282df9 4311 return 0;
33f089ca 4312
c4282df9 4313 return !(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) &
30bd0c4c
AK		 4314 (GUEST_INTR_STATE_MOV_SS | GUEST_INTR_STATE_STI
4315 | GUEST_INTR_STATE_NMI));
33f089ca
JK		 4316}
4317
3cfc3092
JK		 4318static bool vmx_get_nmi_mask(struct kvm_vcpu *vcpu)
4319{
4320 if (!cpu_has_virtual_nmis())
4321 return to_vmx(vcpu)->soft_vnmi_blocked;
9d58b931
AK		 4322 if (to_vmx(vcpu)->nmi_known_unmasked)
4323 return false;
c332c83a 4324 return vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & GUEST_INTR_STATE_NMI;
3cfc3092
JK		 4325}
4326
4327static void vmx_set_nmi_mask(struct kvm_vcpu *vcpu, bool masked)
4328{
4329 struct vcpu_vmx *vmx = to_vmx(vcpu);
4330
4331 if (!cpu_has_virtual_nmis()) {
4332 if (vmx->soft_vnmi_blocked != masked) {
4333 vmx->soft_vnmi_blocked = masked;
4334 vmx->vnmi_blocked_time = 0;
4335 }
4336 } else {
9d58b931 4337 vmx->nmi_known_unmasked = !masked;
3cfc3092
JK		 4338 if (masked)
4339 vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO,
4340 GUEST_INTR_STATE_NMI);
4341 else
4342 vmcs_clear_bits(GUEST_INTERRUPTIBILITY_INFO,
4343 GUEST_INTR_STATE_NMI);
4344 }
4345}
4346
78646121
GN		 4347static int vmx_interrupt_allowed(struct kvm_vcpu *vcpu)
4348{
b6f1250e 4349 if (is_guest_mode(vcpu) && nested_exit_on_intr(vcpu)) {
51cfe38e
NHE		 4350 struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
4351 if (to_vmx(vcpu)->nested.nested_run_pending ||
4352 (vmcs12->idt_vectoring_info_field &
4353 VECTORING_INFO_VALID_MASK))
b6f1250e
NHE		 4354 return 0;
4355 nested_vmx_vmexit(vcpu);
b6f1250e
NHE		 4356 vmcs12->vm_exit_reason = EXIT_REASON_EXTERNAL_INTERRUPT;
4357 vmcs12->vm_exit_intr_info = 0;
4358 /* fall through to normal code, but now in L1, not L2 */
4359 }
4360
c4282df9
GN		 4361 return (vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) &&
4362 !(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) &
4363 (GUEST_INTR_STATE_STI | GUEST_INTR_STATE_MOV_SS));
78646121
GN		 4364}
4365
cbc94022
IE		 4366static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr)
4367{
4368 int ret;
4369 struct kvm_userspace_memory_region tss_mem = {
6fe63979 4370 .slot = TSS_PRIVATE_MEMSLOT,
cbc94022
IE		 4371 .guest_phys_addr = addr,
4372 .memory_size = PAGE_SIZE * 3,
4373 .flags = 0,
4374 };
4375
47ae31e2 4376 ret = kvm_set_memory_region(kvm, &tss_mem);
cbc94022
IE		 4377 if (ret)
4378 return ret;
bfc6d222 4379 kvm->arch.tss_addr = addr;
93ea5388
GN		 4380 if (!init_rmode_tss(kvm))
4381 return -ENOMEM;
4382
cbc94022
IE		 4383 return 0;
4384}
4385
0ca1b4f4 4386static bool rmode_exception(struct kvm_vcpu *vcpu, int vec)
6aa8b732 4387{
77ab6db0 4388 switch (vec) {
77ab6db0 4389 case BP_VECTOR:
c573cd22
JK		 4390 /*
4391 * Update instruction length as we may reinject the exception
4392 * from user space while in guest debugging mode.
4393 */
4394 to_vmx(vcpu)->vcpu.arch.event_exit_inst_len =
4395 vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
d0bfb940 4396 if (vcpu->guest_debug & KVM_GUESTDBG_USE_SW_BP)
0ca1b4f4
GN		 4397 return false;
4398 /* fall through */
4399 case DB_VECTOR:
4400 if (vcpu->guest_debug &
4401 (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))
4402 return false;
d0bfb940
JK		 4403 /* fall through */
4404 case DE_VECTOR:
77ab6db0
JK		 4405 case OF_VECTOR:
4406 case BR_VECTOR:
4407 case UD_VECTOR:
4408 case DF_VECTOR:
4409 case SS_VECTOR:
4410 case GP_VECTOR:
4411 case MF_VECTOR:
0ca1b4f4
GN		 4412 return true;
4413 break;
77ab6db0 4414 }
0ca1b4f4
GN		 4415 return false;
4416}
4417
4418static int handle_rmode_exception(struct kvm_vcpu *vcpu,
4419 int vec, u32 err_code)
4420{
4421 /*
4422 * Instruction with address size override prefix opcode 0x67
4423 * Cause the #SS fault with 0 error code in VM86 mode.
4424 */
4425 if (((vec == GP_VECTOR) || (vec == SS_VECTOR)) && err_code == 0) {
4426 if (emulate_instruction(vcpu, 0) == EMULATE_DONE) {
4427 if (vcpu->arch.halt_request) {
4428 vcpu->arch.halt_request = 0;
4429 return kvm_emulate_halt(vcpu);
4430 }
4431 return 1;
4432 }
4433 return 0;
4434 }
4435
4436 /*
4437 * Forward all other exceptions that are valid in real mode.
4438 * FIXME: Breaks guest debugging in real mode, needs to be fixed with
4439 * the required debugging infrastructure rework.
4440 */
4441 kvm_queue_exception(vcpu, vec);
4442 return 1;
6aa8b732
AK		 4443}
4444
a0861c02
AK		 4445/*
4446 * Trigger machine check on the host. We assume all the MSRs are already set up
4447 * by the CPU and that we still run on the same CPU as the MCE occurred on.
4448 * We pass a fake environment to the machine check handler because we want
4449 * the guest to be always treated like user space, no matter what context
4450 * it used internally.
4451 */
4452static void kvm_machine_check(void)
4453{
4454#if defined(CONFIG_X86_MCE) && defined(CONFIG_X86_64)
4455 struct pt_regs regs = {
4456 .cs = 3, /* Fake ring 3 no matter what the guest ran on */
4457 .flags = X86_EFLAGS_IF,
4458 };
4459
4460 do_machine_check(&regs, 0);
4461#endif
4462}
4463
851ba692 4464static int handle_machine_check(struct kvm_vcpu *vcpu)
a0861c02
AK		 4465{
4466 /* already handled by vcpu_run */
4467 return 1;
4468}
4469
851ba692 4470static int handle_exception(struct kvm_vcpu *vcpu)
6aa8b732 4471{
1155f76a 4472 struct vcpu_vmx *vmx = to_vmx(vcpu);
851ba692 4473 struct kvm_run *kvm_run = vcpu->run;
d0bfb940 4474 u32 intr_info, ex_no, error_code;
42dbaa5a 4475 unsigned long cr2, rip, dr6;
6aa8b732
AK		 4476 u32 vect_info;
4477 enum emulation_result er;
4478
1155f76a 4479 vect_info = vmx->idt_vectoring_info;
88786475 4480 intr_info = vmx->exit_intr_info;
6aa8b732 4481
a0861c02 4482 if (is_machine_check(intr_info))
851ba692 4483 return handle_machine_check(vcpu);
a0861c02 4484
e4a41889 4485 if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR)
1b6269db 4486 return 1; /* already handled by vmx_vcpu_run() */
2ab455cc
AL		 4487
4488 if (is_no_device(intr_info)) {
5fd86fcf 4489 vmx_fpu_activate(vcpu);
2ab455cc
AL		 4490 return 1;
4491 }
4492
7aa81cc0 4493 if (is_invalid_opcode(intr_info)) {
51d8b661 4494 er = emulate_instruction(vcpu, EMULTYPE_TRAP_UD);
7aa81cc0 4495 if (er != EMULATE_DONE)
7ee5d940 4496 kvm_queue_exception(vcpu, UD_VECTOR);
7aa81cc0
AL		 4497 return 1;
4498 }
4499
6aa8b732 4500 error_code = 0;
2e11384c 4501 if (intr_info & INTR_INFO_DELIVER_CODE_MASK)
6aa8b732 4502 error_code = vmcs_read32(VM_EXIT_INTR_ERROR_CODE);
bf4ca23e
XG		 4503
4504 /*
4505 * The #PF with PFEC.RSVD = 1 indicates the guest is accessing
4506 * MMIO, it is better to report an internal error.
4507 * See the comments in vmx_handle_exit.
4508 */
4509 if ((vect_info & VECTORING_INFO_VALID_MASK) &&
4510 !(is_page_fault(intr_info) && !(error_code & PFERR_RSVD_MASK))) {
4511 vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
4512 vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_SIMUL_EX;
4513 vcpu->run->internal.ndata = 2;
4514 vcpu->run->internal.data[0] = vect_info;
4515 vcpu->run->internal.data[1] = intr_info;
4516 return 0;
4517 }
4518
6aa8b732 4519 if (is_page_fault(intr_info)) {
1439442c 4520 /* EPT won't cause page fault directly */
cf3ace79 4521 BUG_ON(enable_ept);
6aa8b732 4522 cr2 = vmcs_readl(EXIT_QUALIFICATION);
229456fc
MT		 4523 trace_kvm_page_fault(cr2, error_code);
4524
3298b75c 4525 if (kvm_event_needs_reinjection(vcpu))
577bdc49 4526 kvm_mmu_unprotect_page_virt(vcpu, cr2);
dc25e89e 4527 return kvm_mmu_page_fault(vcpu, cr2, error_code, NULL, 0);
6aa8b732
AK		 4528 }
4529
d0bfb940 4530 ex_no = intr_info & INTR_INFO_VECTOR_MASK;
0ca1b4f4
GN		 4531
4532 if (vmx->rmode.vm86_active && rmode_exception(vcpu, ex_no))
4533 return handle_rmode_exception(vcpu, ex_no, error_code);
4534
42dbaa5a
JK		 4535 switch (ex_no) {
4536 case DB_VECTOR:
4537 dr6 = vmcs_readl(EXIT_QUALIFICATION);
4538 if (!(vcpu->guest_debug &
4539 (KVM_GUESTDBG_SINGLESTEP | KVM_GUESTDBG_USE_HW_BP))) {
4540 vcpu->arch.dr6 = dr6 | DR6_FIXED_1;
4541 kvm_queue_exception(vcpu, DB_VECTOR);
4542 return 1;
4543 }
4544 kvm_run->debug.arch.dr6 = dr6 | DR6_FIXED_1;
4545 kvm_run->debug.arch.dr7 = vmcs_readl(GUEST_DR7);
4546 /* fall through */
4547 case BP_VECTOR:
c573cd22
JK		 4548 /*
4549 * Update instruction length as we may reinject #BP from
4550 * user space while in guest debugging mode. Reading it for
4551 * #DB as well causes no harm, it is not used in that case.
4552 */
4553 vmx->vcpu.arch.event_exit_inst_len =
4554 vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
6aa8b732 4555 kvm_run->exit_reason = KVM_EXIT_DEBUG;
0a434bb2 4556 rip = kvm_rip_read(vcpu);
d0bfb940
JK		 4557 kvm_run->debug.arch.pc = vmcs_readl(GUEST_CS_BASE) + rip;
4558 kvm_run->debug.arch.exception = ex_no;
42dbaa5a
JK		 4559 break;
4560 default:
d0bfb940
JK		 4561 kvm_run->exit_reason = KVM_EXIT_EXCEPTION;
4562 kvm_run->ex.exception = ex_no;
4563 kvm_run->ex.error_code = error_code;
42dbaa5a 4564 break;
6aa8b732 4565 }
6aa8b732
AK		 4566 return 0;
4567}
4568
851ba692 4569static int handle_external_interrupt(struct kvm_vcpu *vcpu)
6aa8b732 4570{
1165f5fe 4571 ++vcpu->stat.irq_exits;
6aa8b732
AK		 4572 return 1;
4573}
4574
851ba692 4575static int handle_triple_fault(struct kvm_vcpu *vcpu)
988ad74f 4576{
851ba692 4577 vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN;
988ad74f
AK		 4578 return 0;
4579}
6aa8b732 4580
851ba692 4581static int handle_io(struct kvm_vcpu *vcpu)
6aa8b732 4582{
bfdaab09 4583 unsigned long exit_qualification;
34c33d16 4584 int size, in, string;
039576c0 4585 unsigned port;
6aa8b732 4586
bfdaab09 4587 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
039576c0 4588 string = (exit_qualification & 16) != 0;
cf8f70bf 4589 in = (exit_qualification & 8) != 0;
e70669ab 4590
cf8f70bf 4591 ++vcpu->stat.io_exits;
e70669ab 4592
cf8f70bf 4593 if (string || in)
51d8b661 4594 return emulate_instruction(vcpu, 0) == EMULATE_DONE;
e70669ab 4595
cf8f70bf
GN		 4596 port = exit_qualification >> 16;
4597 size = (exit_qualification & 7) + 1;
e93f36bc 4598 skip_emulated_instruction(vcpu);
cf8f70bf
GN		 4599
4600 return kvm_fast_pio_out(vcpu, size, port);
6aa8b732
AK		 4601}
4602
102d8325
IM		 4603static void
4604vmx_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall)
4605{
4606 /*
4607 * Patch in the VMCALL instruction:
4608 */
4609 hypercall[0] = 0x0f;
4610 hypercall[1] = 0x01;
4611 hypercall[2] = 0xc1;
102d8325
IM		 4612}
4613
0fa06071 4614/* called to set cr0 as appropriate for a mov-to-cr0 exit. */
eeadf9e7
NHE		 4615static int handle_set_cr0(struct kvm_vcpu *vcpu, unsigned long val)
4616{
eeadf9e7 4617 if (is_guest_mode(vcpu)) {
1a0d74e6
JK		 4618 struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
4619 unsigned long orig_val = val;
4620
eeadf9e7
NHE		 4621 /*
4622 * We get here when L2 changed cr0 in a way that did not change
4623 * any of L1's shadowed bits (see nested_vmx_exit_handled_cr),
1a0d74e6
JK		 4624 * but did change L0 shadowed bits. So we first calculate the
4625 * effective cr0 value that L1 would like to write into the
4626 * hardware. It consists of the L2-owned bits from the new
4627 * value combined with the L1-owned bits from L1's guest_cr0.
eeadf9e7 4628 */
1a0d74e6
JK		 4629 val = (val & ~vmcs12->cr0_guest_host_mask) |
4630 (vmcs12->guest_cr0 & vmcs12->cr0_guest_host_mask);
4631
4632 /* TODO: will have to take unrestricted guest mode into
4633 * account */
4634 if ((val & VMXON_CR0_ALWAYSON) != VMXON_CR0_ALWAYSON)
eeadf9e7 4635 return 1;
1a0d74e6
JK		 4636
4637 if (kvm_set_cr0(vcpu, val))
4638 return 1;
4639 vmcs_writel(CR0_READ_SHADOW, orig_val);
eeadf9e7 4640 return 0;
1a0d74e6
JK		 4641 } else {
4642 if (to_vmx(vcpu)->nested.vmxon &&
4643 ((val & VMXON_CR0_ALWAYSON) != VMXON_CR0_ALWAYSON))
4644 return 1;
eeadf9e7 4645 return kvm_set_cr0(vcpu, val);
1a0d74e6 4646 }
eeadf9e7
NHE		 4647}
4648
4649static int handle_set_cr4(struct kvm_vcpu *vcpu, unsigned long val)
4650{
4651 if (is_guest_mode(vcpu)) {
1a0d74e6
JK		 4652 struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
4653 unsigned long orig_val = val;
4654
4655 /* analogously to handle_set_cr0 */
4656 val = (val & ~vmcs12->cr4_guest_host_mask) |
4657 (vmcs12->guest_cr4 & vmcs12->cr4_guest_host_mask);
4658 if (kvm_set_cr4(vcpu, val))
eeadf9e7 4659 return 1;
1a0d74e6 4660 vmcs_writel(CR4_READ_SHADOW, orig_val);
eeadf9e7
NHE		 4661 return 0;
4662 } else
4663 return kvm_set_cr4(vcpu, val);
4664}
4665
4666/* called to set cr0 as approriate for clts instruction exit. */
4667static void handle_clts(struct kvm_vcpu *vcpu)
4668{
4669 if (is_guest_mode(vcpu)) {
4670 /*
4671 * We get here when L2 did CLTS, and L1 didn't shadow CR0.TS
4672 * but we did (!fpu_active). We need to keep GUEST_CR0.TS on,
4673 * just pretend it's off (also in arch.cr0 for fpu_activate).
4674 */
4675 vmcs_writel(CR0_READ_SHADOW,
4676 vmcs_readl(CR0_READ_SHADOW) & ~X86_CR0_TS);
4677 vcpu->arch.cr0 &= ~X86_CR0_TS;
4678 } else
4679 vmx_set_cr0(vcpu, kvm_read_cr0_bits(vcpu, ~X86_CR0_TS));
4680}
4681
851ba692 4682static int handle_cr(struct kvm_vcpu *vcpu)
6aa8b732 4683{
229456fc 4684 unsigned long exit_qualification, val;
6aa8b732
AK		 4685 int cr;
4686 int reg;
49a9b07e 4687 int err;
6aa8b732 4688
bfdaab09 4689 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
6aa8b732
AK		 4690 cr = exit_qualification & 15;
4691 reg = (exit_qualification >> 8) & 15;
4692 switch ((exit_qualification >> 4) & 3) {
4693 case 0: /* mov to cr */
229456fc
MT		 4694 val = kvm_register_read(vcpu, reg);
4695 trace_kvm_cr_write(cr, val);
6aa8b732
AK		 4696 switch (cr) {
4697 case 0:
eeadf9e7 4698 err = handle_set_cr0(vcpu, val);
db8fcefa 4699 kvm_complete_insn_gp(vcpu, err);
6aa8b732
AK		 4700 return 1;
4701 case 3:
2390218b 4702 err = kvm_set_cr3(vcpu, val);
db8fcefa 4703 kvm_complete_insn_gp(vcpu, err);
6aa8b732
AK		 4704 return 1;
4705 case 4:
eeadf9e7 4706 err = handle_set_cr4(vcpu, val);
db8fcefa 4707 kvm_complete_insn_gp(vcpu, err);
6aa8b732 4708 return 1;
0a5fff19
GN		 4709 case 8: {
4710 u8 cr8_prev = kvm_get_cr8(vcpu);
4711 u8 cr8 = kvm_register_read(vcpu, reg);
eea1cff9 4712 err = kvm_set_cr8(vcpu, cr8);
db8fcefa 4713 kvm_complete_insn_gp(vcpu, err);
0a5fff19
GN		 4714 if (irqchip_in_kernel(vcpu->kvm))
4715 return 1;
4716 if (cr8_prev <= cr8)
4717 return 1;
851ba692 4718 vcpu->run->exit_reason = KVM_EXIT_SET_TPR;
0a5fff19
GN		 4719 return 0;
4720 }
4b8073e4 4721 }
6aa8b732 4722 break;
25c4c276 4723 case 2: /* clts */
eeadf9e7 4724 handle_clts(vcpu);
4d4ec087 4725 trace_kvm_cr_write(0, kvm_read_cr0(vcpu));
25c4c276 4726 skip_emulated_instruction(vcpu);
6b52d186 4727 vmx_fpu_activate(vcpu);
25c4c276 4728 return 1;
6aa8b732
AK		 4729 case 1: /*mov from cr*/
4730 switch (cr) {
4731 case 3:
9f8fe504
AK		 4732 val = kvm_read_cr3(vcpu);
4733 kvm_register_write(vcpu, reg, val);
4734 trace_kvm_cr_read(cr, val);
6aa8b732
AK		 4735 skip_emulated_instruction(vcpu);
4736 return 1;
4737 case 8:
229456fc
MT		 4738 val = kvm_get_cr8(vcpu);
4739 kvm_register_write(vcpu, reg, val);
4740 trace_kvm_cr_read(cr, val);
6aa8b732
AK		 4741 skip_emulated_instruction(vcpu);
4742 return 1;
4743 }
4744 break;
4745 case 3: /* lmsw */
a1f83a74 4746 val = (exit_qualification >> LMSW_SOURCE_DATA_SHIFT) & 0x0f;
4d4ec087 4747 trace_kvm_cr_write(0, (kvm_read_cr0(vcpu) & ~0xful) | val);
a1f83a74 4748 kvm_lmsw(vcpu, val);
6aa8b732
AK		 4749
4750 skip_emulated_instruction(vcpu);
4751 return 1;
4752 default:
4753 break;
4754 }
851ba692 4755 vcpu->run->exit_reason = 0;
a737f256 4756 vcpu_unimpl(vcpu, "unhandled control register: op %d cr %d\n",
6aa8b732
AK		 4757 (int)(exit_qualification >> 4) & 3, cr);
4758 return 0;
4759}
4760
851ba692 4761static int handle_dr(struct kvm_vcpu *vcpu)
6aa8b732 4762{
bfdaab09 4763 unsigned long exit_qualification;
6aa8b732
AK		 4764 int dr, reg;
4765
f2483415 4766 /* Do not handle if the CPL > 0, will trigger GP on re-entry */
0a79b009
AK		 4767 if (!kvm_require_cpl(vcpu, 0))
4768 return 1;
42dbaa5a
JK		 4769 dr = vmcs_readl(GUEST_DR7);
4770 if (dr & DR7_GD) {
4771 /*
4772 * As the vm-exit takes precedence over the debug trap, we
4773 * need to emulate the latter, either for the host or the
4774 * guest debugging itself.
4775 */
4776 if (vcpu->guest_debug & KVM_GUESTDBG_USE_HW_BP) {
851ba692
AK		 4777 vcpu->run->debug.arch.dr6 = vcpu->arch.dr6;
4778 vcpu->run->debug.arch.dr7 = dr;
4779 vcpu->run->debug.arch.pc =
42dbaa5a
JK		 4780 vmcs_readl(GUEST_CS_BASE) +
4781 vmcs_readl(GUEST_RIP);
851ba692
AK		 4782 vcpu->run->debug.arch.exception = DB_VECTOR;
4783 vcpu->run->exit_reason = KVM_EXIT_DEBUG;
42dbaa5a
JK		 4784 return 0;
4785 } else {
4786 vcpu->arch.dr7 &= ~DR7_GD;
4787 vcpu->arch.dr6 |= DR6_BD;
4788 vmcs_writel(GUEST_DR7, vcpu->arch.dr7);
4789 kvm_queue_exception(vcpu, DB_VECTOR);
4790 return 1;
4791 }
4792 }
4793
bfdaab09 4794 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
42dbaa5a
JK		 4795 dr = exit_qualification & DEBUG_REG_ACCESS_NUM;
4796 reg = DEBUG_REG_ACCESS_REG(exit_qualification);
4797 if (exit_qualification & TYPE_MOV_FROM_DR) {
020df079
GN		 4798 unsigned long val;
4799 if (!kvm_get_dr(vcpu, dr, &val))
4800 kvm_register_write(vcpu, reg, val);
4801 } else
4802 kvm_set_dr(vcpu, dr, vcpu->arch.regs[reg]);
6aa8b732
AK		 4803 skip_emulated_instruction(vcpu);
4804 return 1;
4805}
4806
020df079
GN		 4807static void vmx_set_dr7(struct kvm_vcpu *vcpu, unsigned long val)
4808{
4809 vmcs_writel(GUEST_DR7, val);
4810}
4811
851ba692 4812static int handle_cpuid(struct kvm_vcpu *vcpu)
6aa8b732 4813{
06465c5a
AK		 4814 kvm_emulate_cpuid(vcpu);
4815 return 1;
6aa8b732
AK		 4816}
4817
851ba692 4818static int handle_rdmsr(struct kvm_vcpu *vcpu)
6aa8b732 4819{
ad312c7c 4820 u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX];
6aa8b732
AK		 4821 u64 data;
4822
4823 if (vmx_get_msr(vcpu, ecx, &data)) {
59200273 4824 trace_kvm_msr_read_ex(ecx);
c1a5d4f9 4825 kvm_inject_gp(vcpu, 0);
6aa8b732
AK		 4826 return 1;
4827 }
4828
229456fc 4829 trace_kvm_msr_read(ecx, data);
2714d1d3 4830
6aa8b732 4831 /* FIXME: handling of bits 32:63 of rax, rdx */
ad312c7c
ZX		 4832 vcpu->arch.regs[VCPU_REGS_RAX] = data & -1u;
4833 vcpu->arch.regs[VCPU_REGS_RDX] = (data >> 32) & -1u;
6aa8b732
AK		 4834 skip_emulated_instruction(vcpu);
4835 return 1;
4836}
4837
851ba692 4838static int handle_wrmsr(struct kvm_vcpu *vcpu)
6aa8b732 4839{
8fe8ab46 4840 struct msr_data msr;
ad312c7c
ZX		 4841 u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX];
4842 u64 data = (vcpu->arch.regs[VCPU_REGS_RAX] & -1u)
4843 | ((u64)(vcpu->arch.regs[VCPU_REGS_RDX] & -1u) << 32);
6aa8b732 4844
8fe8ab46
WA		 4845 msr.data = data;
4846 msr.index = ecx;
4847 msr.host_initiated = false;
4848 if (vmx_set_msr(vcpu, &msr) != 0) {
59200273 4849 trace_kvm_msr_write_ex(ecx, data);
c1a5d4f9 4850 kvm_inject_gp(vcpu, 0);
6aa8b732
AK		 4851 return 1;
4852 }
4853
59200273 4854 trace_kvm_msr_write(ecx, data);
6aa8b732
AK		 4855 skip_emulated_instruction(vcpu);
4856 return 1;
4857}
4858
851ba692 4859static int handle_tpr_below_threshold(struct kvm_vcpu *vcpu)
6e5d865c 4860{
3842d135 4861 kvm_make_request(KVM_REQ_EVENT, vcpu);
6e5d865c
YS		 4862 return 1;
4863}
4864
851ba692 4865static int handle_interrupt_window(struct kvm_vcpu *vcpu)
6aa8b732 4866{
85f455f7
ED		 4867 u32 cpu_based_vm_exec_control;
4868
4869 /* clear pending irq */
4870 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
4871 cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING;
4872 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
2714d1d3 4873
3842d135
AK		 4874 kvm_make_request(KVM_REQ_EVENT, vcpu);
4875
a26bf12a 4876 ++vcpu->stat.irq_window_exits;
2714d1d3 4877
c1150d8c
DL		 4878 /*
4879 * If the user space waits to inject interrupts, exit as soon as
4880 * possible
4881 */
8061823a 4882 if (!irqchip_in_kernel(vcpu->kvm) &&
851ba692 4883 vcpu->run->request_interrupt_window &&
8061823a 4884 !kvm_cpu_has_interrupt(vcpu)) {
851ba692 4885 vcpu->run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN;
c1150d8c
DL		 4886 return 0;
4887 }
6aa8b732
AK		 4888 return 1;
4889}
4890
851ba692 4891static int handle_halt(struct kvm_vcpu *vcpu)
6aa8b732
AK		 4892{
4893 skip_emulated_instruction(vcpu);
d3bef15f 4894 return kvm_emulate_halt(vcpu);
6aa8b732
AK		 4895}
4896
851ba692 4897static int handle_vmcall(struct kvm_vcpu *vcpu)
c21415e8 4898{
510043da 4899 skip_emulated_instruction(vcpu);
7aa81cc0
AL		 4900 kvm_emulate_hypercall(vcpu);
4901 return 1;
c21415e8
IM		 4902}
4903
ec25d5e6
GN		 4904static int handle_invd(struct kvm_vcpu *vcpu)
4905{
51d8b661 4906 return emulate_instruction(vcpu, 0) == EMULATE_DONE;
ec25d5e6
GN		 4907}
4908
851ba692 4909static int handle_invlpg(struct kvm_vcpu *vcpu)
a7052897 4910{
f9c617f6 4911 unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
a7052897
MT		 4912
4913 kvm_mmu_invlpg(vcpu, exit_qualification);
4914 skip_emulated_instruction(vcpu);
4915 return 1;
4916}
4917
fee84b07
AK		 4918static int handle_rdpmc(struct kvm_vcpu *vcpu)
4919{
4920 int err;
4921
4922 err = kvm_rdpmc(vcpu);
4923 kvm_complete_insn_gp(vcpu, err);
4924
4925 return 1;
4926}
4927
851ba692 4928static int handle_wbinvd(struct kvm_vcpu *vcpu)
e5edaa01
ED		 4929{
4930 skip_emulated_instruction(vcpu);
f5f48ee1 4931 kvm_emulate_wbinvd(vcpu);
e5edaa01
ED		 4932 return 1;
4933}
4934
2acf923e
DC		 4935static int handle_xsetbv(struct kvm_vcpu *vcpu)
4936{
4937 u64 new_bv = kvm_read_edx_eax(vcpu);
4938 u32 index = kvm_register_read(vcpu, VCPU_REGS_RCX);
4939
4940 if (kvm_set_xcr(vcpu, index, new_bv) == 0)
4941 skip_emulated_instruction(vcpu);
4942 return 1;
4943}
4944
851ba692 4945static int handle_apic_access(struct kvm_vcpu *vcpu)
f78e0e2e 4946{
58fbbf26
KT		 4947 if (likely(fasteoi)) {
4948 unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
4949 int access_type, offset;
4950
4951 access_type = exit_qualification & APIC_ACCESS_TYPE;
4952 offset = exit_qualification & APIC_ACCESS_OFFSET;
4953 /*
4954 * Sane guest uses MOV to write EOI, with written value
4955 * not cared. So make a short-circuit here by avoiding
4956 * heavy instruction emulation.
4957 */
4958 if ((access_type == TYPE_LINEAR_APIC_INST_WRITE) &&
4959 (offset == APIC_EOI)) {
4960 kvm_lapic_set_eoi(vcpu);
4961 skip_emulated_instruction(vcpu);
4962 return 1;
4963 }
4964 }
51d8b661 4965 return emulate_instruction(vcpu, 0) == EMULATE_DONE;
f78e0e2e
SY		 4966}
4967
c7c9c56c
YZ		 4968static int handle_apic_eoi_induced(struct kvm_vcpu *vcpu)
4969{
4970 unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
4971 int vector = exit_qualification & 0xff;
4972
4973 /* EOI-induced VM exit is trap-like and thus no need to adjust IP */
4974 kvm_apic_set_eoi_accelerated(vcpu, vector);
4975 return 1;
4976}
4977
83d4c286
YZ		 4978static int handle_apic_write(struct kvm_vcpu *vcpu)
4979{
4980 unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
4981 u32 offset = exit_qualification & 0xfff;
4982
4983 /* APIC-write VM exit is trap-like and thus no need to adjust IP */
4984 kvm_apic_write_nodecode(vcpu, offset);
4985 return 1;
4986}
4987
851ba692 4988static int handle_task_switch(struct kvm_vcpu *vcpu)
37817f29 4989{
60637aac 4990 struct vcpu_vmx *vmx = to_vmx(vcpu);
37817f29 4991 unsigned long exit_qualification;
e269fb21
JK		 4992 bool has_error_code = false;
4993 u32 error_code = 0;
37817f29 4994 u16 tss_selector;
7f3d35fd 4995 int reason, type, idt_v, idt_index;
64a7ec06
GN		 4996
4997 idt_v = (vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK);
7f3d35fd 4998 idt_index = (vmx->idt_vectoring_info & VECTORING_INFO_VECTOR_MASK);
64a7ec06 4999 type = (vmx->idt_vectoring_info & VECTORING_INFO_TYPE_MASK);
37817f29
IE		 5000
5001 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
5002
5003 reason = (u32)exit_qualification >> 30;
64a7ec06
GN		 5004 if (reason == TASK_SWITCH_GATE && idt_v) {
5005 switch (type) {
5006 case INTR_TYPE_NMI_INTR:
5007 vcpu->arch.nmi_injected = false;
654f06fc 5008 vmx_set_nmi_mask(vcpu, true);
64a7ec06
GN		 5009 break;
5010 case INTR_TYPE_EXT_INTR:
66fd3f7f 5011 case INTR_TYPE_SOFT_INTR:
64a7ec06
GN		 5012 kvm_clear_interrupt_queue(vcpu);
5013 break;
5014 case INTR_TYPE_HARD_EXCEPTION:
e269fb21
JK		 5015 if (vmx->idt_vectoring_info &
5016 VECTORING_INFO_DELIVER_CODE_MASK) {
5017 has_error_code = true;
5018 error_code =
5019 vmcs_read32(IDT_VECTORING_ERROR_CODE);
5020 }
5021 /* fall through */
64a7ec06
GN		 5022 case INTR_TYPE_SOFT_EXCEPTION:
5023 kvm_clear_exception_queue(vcpu);
5024 break;
5025 default:
5026 break;
5027 }
60637aac 5028 }
37817f29
IE		 5029 tss_selector = exit_qualification;
5030
64a7ec06
GN		 5031 if (!idt_v || (type != INTR_TYPE_HARD_EXCEPTION &&
5032 type != INTR_TYPE_EXT_INTR &&
5033 type != INTR_TYPE_NMI_INTR))
5034 skip_emulated_instruction(vcpu);
5035
7f3d35fd
KW		 5036 if (kvm_task_switch(vcpu, tss_selector,
5037 type == INTR_TYPE_SOFT_INTR ? idt_index : -1, reason,
5038 has_error_code, error_code) == EMULATE_FAIL) {
acb54517
GN		 5039 vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
5040 vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
5041 vcpu->run->internal.ndata = 0;
42dbaa5a 5042 return 0;
acb54517 5043 }
42dbaa5a
JK		 5044
5045 /* clear all local breakpoint enable flags */
5046 vmcs_writel(GUEST_DR7, vmcs_readl(GUEST_DR7) & ~55);
5047
5048 /*
5049 * TODO: What about debug traps on tss switch?
5050 * Are we supposed to inject them and update dr6?
5051 */
5052
5053 return 1;
37817f29
IE		 5054}
5055
851ba692 5056static int handle_ept_violation(struct kvm_vcpu *vcpu)
1439442c 5057{
f9c617f6 5058 unsigned long exit_qualification;
1439442c 5059 gpa_t gpa;
4f5982a5 5060 u32 error_code;
1439442c 5061 int gla_validity;
1439442c 5062
f9c617f6 5063 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
1439442c 5064
1439442c
SY		 5065 gla_validity = (exit_qualification >> 7) & 0x3;
5066 if (gla_validity != 0x3 && gla_validity != 0x1 && gla_validity != 0) {
5067 printk(KERN_ERR "EPT: Handling EPT violation failed!\n");
5068 printk(KERN_ERR "EPT: GPA: 0x%lx, GVA: 0x%lx\n",
5069 (long unsigned int)vmcs_read64(GUEST_PHYSICAL_ADDRESS),
f9c617f6 5070 vmcs_readl(GUEST_LINEAR_ADDRESS));
1439442c
SY		 5071 printk(KERN_ERR "EPT: Exit qualification is 0x%lx\n",
5072 (long unsigned int)exit_qualification);
851ba692
AK		 5073 vcpu->run->exit_reason = KVM_EXIT_UNKNOWN;
5074 vcpu->run->hw.hardware_exit_reason = EXIT_REASON_EPT_VIOLATION;
596ae895 5075 return 0;
1439442c
SY		 5076 }
5077
5078 gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS);
229456fc 5079 trace_kvm_page_fault(gpa, exit_qualification);
4f5982a5
XG		 5080
5081 /* It is a write fault? */
5082 error_code = exit_qualification & (1U << 1);
5083 /* ept page table is present? */
5084 error_code |= (exit_qualification >> 3) & 0x1;
5085
5086 return kvm_mmu_page_fault(vcpu, gpa, error_code, NULL, 0);
1439442c
SY		 5087}
5088
68f89400
MT		 5089static u64 ept_rsvd_mask(u64 spte, int level)
5090{
5091 int i;
5092 u64 mask = 0;
5093
5094 for (i = 51; i > boot_cpu_data.x86_phys_bits; i--)
5095 mask |= (1ULL << i);
5096
5097 if (level > 2)
5098 /* bits 7:3 reserved */
5099 mask |= 0xf8;
5100 else if (level == 2) {
5101 if (spte & (1ULL << 7))
5102 /* 2MB ref, bits 20:12 reserved */
5103 mask |= 0x1ff000;
5104 else
5105 /* bits 6:3 reserved */
5106 mask |= 0x78;
5107 }
5108
5109 return mask;
5110}
5111
5112static void ept_misconfig_inspect_spte(struct kvm_vcpu *vcpu, u64 spte,
5113 int level)
5114{
5115 printk(KERN_ERR "%s: spte 0x%llx level %d\n", __func__, spte, level);
5116
5117 /* 010b (write-only) */
5118 WARN_ON((spte & 0x7) == 0x2);
5119
5120 /* 110b (write/execute) */
5121 WARN_ON((spte & 0x7) == 0x6);
5122
5123 /* 100b (execute-only) and value not supported by logical processor */
5124 if (!cpu_has_vmx_ept_execute_only())
5125 WARN_ON((spte & 0x7) == 0x4);
5126
5127 /* not 000b */
5128 if ((spte & 0x7)) {
5129 u64 rsvd_bits = spte & ept_rsvd_mask(spte, level);
5130
5131 if (rsvd_bits != 0) {
5132 printk(KERN_ERR "%s: rsvd_bits = 0x%llx\n",
5133 __func__, rsvd_bits);
5134 WARN_ON(1);
5135 }
5136
5137 if (level == 1 || (level == 2 && (spte & (1ULL << 7)))) {
5138 u64 ept_mem_type = (spte & 0x38) >> 3;
5139
5140 if (ept_mem_type == 2 || ept_mem_type == 3 ||
5141 ept_mem_type == 7) {
5142 printk(KERN_ERR "%s: ept_mem_type=0x%llx\n",
5143 __func__, ept_mem_type);
5144 WARN_ON(1);
5145 }
5146 }
5147 }
5148}
5149
851ba692 5150static int handle_ept_misconfig(struct kvm_vcpu *vcpu)
68f89400
MT		 5151{
5152 u64 sptes[4];
ce88decf 5153 int nr_sptes, i, ret;
68f89400
MT		 5154 gpa_t gpa;
5155
5156 gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS);
5157
ce88decf
XG		 5158 ret = handle_mmio_page_fault_common(vcpu, gpa, true);
5159 if (likely(ret == 1))
5160 return x86_emulate_instruction(vcpu, gpa, 0, NULL, 0) ==
5161 EMULATE_DONE;
5162 if (unlikely(!ret))
5163 return 1;
5164
5165 /* It is the real ept misconfig */
68f89400
MT		 5166 printk(KERN_ERR "EPT: Misconfiguration.\n");
5167 printk(KERN_ERR "EPT: GPA: 0x%llx\n", gpa);
5168
5169 nr_sptes = kvm_mmu_get_spte_hierarchy(vcpu, gpa, sptes);
5170
5171 for (i = PT64_ROOT_LEVEL; i > PT64_ROOT_LEVEL - nr_sptes; --i)
5172 ept_misconfig_inspect_spte(vcpu, sptes[i-1], i);
5173
851ba692
AK		 5174 vcpu->run->exit_reason = KVM_EXIT_UNKNOWN;
5175 vcpu->run->hw.hardware_exit_reason = EXIT_REASON_EPT_MISCONFIG;
68f89400
MT		 5176
5177 return 0;
5178}
5179
851ba692 5180static int handle_nmi_window(struct kvm_vcpu *vcpu)
f08864b4
SY		 5181{
5182 u32 cpu_based_vm_exec_control;
5183
5184 /* clear pending NMI */
5185 cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
5186 cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_NMI_PENDING;
5187 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
5188 ++vcpu->stat.nmi_window_exits;
3842d135 5189 kvm_make_request(KVM_REQ_EVENT, vcpu);
f08864b4
SY		 5190
5191 return 1;
5192}
5193
80ced186 5194static int handle_invalid_guest_state(struct kvm_vcpu *vcpu)
ea953ef0 5195{
8b3079a5
AK		 5196 struct vcpu_vmx *vmx = to_vmx(vcpu);
5197 enum emulation_result err = EMULATE_DONE;
80ced186 5198 int ret = 1;
49e9d557
AK		 5199 u32 cpu_exec_ctrl;
5200 bool intr_window_requested;
b8405c18 5201 unsigned count = 130;
49e9d557
AK		 5202
5203 cpu_exec_ctrl = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
5204 intr_window_requested = cpu_exec_ctrl & CPU_BASED_VIRTUAL_INTR_PENDING;
ea953ef0 5205
b8405c18 5206 while (!guest_state_valid(vcpu) && count-- != 0) {
bdea48e3 5207 if (intr_window_requested && vmx_interrupt_allowed(vcpu))
49e9d557
AK		 5208 return handle_interrupt_window(&vmx->vcpu);
5209
de87dcdd
AK		 5210 if (test_bit(KVM_REQ_EVENT, &vcpu->requests))
5211 return 1;
5212
51d8b661 5213 err = emulate_instruction(vcpu, 0);
ea953ef0 5214
80ced186
MG		 5215 if (err == EMULATE_DO_MMIO) {
5216 ret = 0;
5217 goto out;
5218 }
1d5a4d9b 5219
de5f70e0
AK		 5220 if (err != EMULATE_DONE) {
5221 vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
5222 vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_EMULATION;
5223 vcpu->run->internal.ndata = 0;
6d77dbfc 5224 return 0;
de5f70e0 5225 }
ea953ef0
MG		 5226
5227 if (signal_pending(current))
80ced186 5228 goto out;
ea953ef0
MG		 5229 if (need_resched())
5230 schedule();
5231 }
5232
14168786 5233 vmx->emulation_required = emulation_required(vcpu);
80ced186
MG		 5234out:
5235 return ret;
ea953ef0
MG		 5236}
5237
4b8d54f9
ZE		 5238/*
5239 * Indicate a busy-waiting vcpu in spinlock. We do not enable the PAUSE
5240 * exiting, so only get here on cpu with PAUSE-Loop-Exiting.
5241 */
9fb41ba8 5242static int handle_pause(struct kvm_vcpu *vcpu)
4b8d54f9
ZE		 5243{
5244 skip_emulated_instruction(vcpu);
5245 kvm_vcpu_on_spin(vcpu);
5246
5247 return 1;
5248}
5249
59708670
SY		 5250static int handle_invalid_op(struct kvm_vcpu *vcpu)
5251{
5252 kvm_queue_exception(vcpu, UD_VECTOR);
5253 return 1;
5254}
5255
ff2f6fe9
NHE		 5256/*
5257 * To run an L2 guest, we need a vmcs02 based on the L1-specified vmcs12.
5258 * We could reuse a single VMCS for all the L2 guests, but we also want the
5259 * option to allocate a separate vmcs02 for each separate loaded vmcs12 - this
5260 * allows keeping them loaded on the processor, and in the future will allow
5261 * optimizations where prepare_vmcs02 doesn't need to set all the fields on
5262 * every entry if they never change.
5263 * So we keep, in vmx->nested.vmcs02_pool, a cache of size VMCS02_POOL_SIZE
5264 * (>=0) with a vmcs02 for each recently loaded vmcs12s, most recent first.
5265 *
5266 * The following functions allocate and free a vmcs02 in this pool.
5267 */
5268
5269/* Get a VMCS from the pool to use as vmcs02 for the current vmcs12. */
5270static struct loaded_vmcs *nested_get_current_vmcs02(struct vcpu_vmx *vmx)
5271{
5272 struct vmcs02_list *item;
5273 list_for_each_entry(item, &vmx->nested.vmcs02_pool, list)
5274 if (item->vmptr == vmx->nested.current_vmptr) {
5275 list_move(&item->list, &vmx->nested.vmcs02_pool);
5276 return &item->vmcs02;
5277 }
5278
5279 if (vmx->nested.vmcs02_num >= max(VMCS02_POOL_SIZE, 1)) {
5280 /* Recycle the least recently used VMCS. */
5281 item = list_entry(vmx->nested.vmcs02_pool.prev,
5282 struct vmcs02_list, list);
5283 item->vmptr = vmx->nested.current_vmptr;
5284 list_move(&item->list, &vmx->nested.vmcs02_pool);
5285 return &item->vmcs02;
5286 }
5287
5288 /* Create a new VMCS */
0fa24ce3 5289 item = kmalloc(sizeof(struct vmcs02_list), GFP_KERNEL);
ff2f6fe9
NHE		 5290 if (!item)
5291 return NULL;
5292 item->vmcs02.vmcs = alloc_vmcs();
5293 if (!item->vmcs02.vmcs) {
5294 kfree(item);
5295 return NULL;
5296 }
5297 loaded_vmcs_init(&item->vmcs02);
5298 item->vmptr = vmx->nested.current_vmptr;
5299 list_add(&(item->list), &(vmx->nested.vmcs02_pool));
5300 vmx->nested.vmcs02_num++;
5301 return &item->vmcs02;
5302}
5303
5304/* Free and remove from pool a vmcs02 saved for a vmcs12 (if there is one) */
5305static void nested_free_vmcs02(struct vcpu_vmx *vmx, gpa_t vmptr)
5306{
5307 struct vmcs02_list *item;
5308 list_for_each_entry(item, &vmx->nested.vmcs02_pool, list)
5309 if (item->vmptr == vmptr) {
5310 free_loaded_vmcs(&item->vmcs02);
5311 list_del(&item->list);
5312 kfree(item);
5313 vmx->nested.vmcs02_num--;
5314 return;
5315 }
5316}
5317
5318/*
5319 * Free all VMCSs saved for this vcpu, except the one pointed by
5320 * vmx->loaded_vmcs. These include the VMCSs in vmcs02_pool (except the one
5321 * currently used, if running L2), and vmcs01 when running L2.
5322 */
5323static void nested_free_all_saved_vmcss(struct vcpu_vmx *vmx)
5324{
5325 struct vmcs02_list *item, *n;
5326 list_for_each_entry_safe(item, n, &vmx->nested.vmcs02_pool, list) {
5327 if (vmx->loaded_vmcs != &item->vmcs02)
5328 free_loaded_vmcs(&item->vmcs02);
5329 list_del(&item->list);
5330 kfree(item);
5331 }
5332 vmx->nested.vmcs02_num = 0;
5333
5334 if (vmx->loaded_vmcs != &vmx->vmcs01)
5335 free_loaded_vmcs(&vmx->vmcs01);
5336}
5337
ec378aee
NHE		 5338/*
5339 * Emulate the VMXON instruction.
5340 * Currently, we just remember that VMX is active, and do not save or even
5341 * inspect the argument to VMXON (the so-called "VMXON pointer") because we
5342 * do not currently need to store anything in that guest-allocated memory
5343 * region. Consequently, VMCLEAR and VMPTRLD also do not verify that the their
5344 * argument is different from the VMXON pointer (which the spec says they do).
5345 */
5346static int handle_vmon(struct kvm_vcpu *vcpu)
5347{
5348 struct kvm_segment cs;
5349 struct vcpu_vmx *vmx = to_vmx(vcpu);
5350
5351 /* The Intel VMX Instruction Reference lists a bunch of bits that
5352 * are prerequisite to running VMXON, most notably cr4.VMXE must be
5353 * set to 1 (see vmx_set_cr4() for when we allow the guest to set this).
5354 * Otherwise, we should fail with #UD. We test these now:
5355 */
5356 if (!kvm_read_cr4_bits(vcpu, X86_CR4_VMXE) ||
5357 !kvm_read_cr0_bits(vcpu, X86_CR0_PE) ||
5358 (vmx_get_rflags(vcpu) & X86_EFLAGS_VM)) {
5359 kvm_queue_exception(vcpu, UD_VECTOR);
5360 return 1;
5361 }
5362
5363 vmx_get_segment(vcpu, &cs, VCPU_SREG_CS);
5364 if (is_long_mode(vcpu) && !cs.l) {
5365 kvm_queue_exception(vcpu, UD_VECTOR);
5366 return 1;
5367 }
5368
5369 if (vmx_get_cpl(vcpu)) {
5370 kvm_inject_gp(vcpu, 0);
5371 return 1;
5372 }
5373
ff2f6fe9
NHE		 5374 INIT_LIST_HEAD(&(vmx->nested.vmcs02_pool));
5375 vmx->nested.vmcs02_num = 0;
5376
ec378aee
NHE		 5377 vmx->nested.vmxon = true;
5378
5379 skip_emulated_instruction(vcpu);
5380 return 1;
5381}
5382
5383/*
5384 * Intel's VMX Instruction Reference specifies a common set of prerequisites
5385 * for running VMX instructions (except VMXON, whose prerequisites are
5386 * slightly different). It also specifies what exception to inject otherwise.
5387 */
5388static int nested_vmx_check_permission(struct kvm_vcpu *vcpu)
5389{
5390 struct kvm_segment cs;
5391 struct vcpu_vmx *vmx = to_vmx(vcpu);
5392
5393 if (!vmx->nested.vmxon) {
5394 kvm_queue_exception(vcpu, UD_VECTOR);
5395 return 0;
5396 }
5397
5398 vmx_get_segment(vcpu, &cs, VCPU_SREG_CS);
5399 if ((vmx_get_rflags(vcpu) & X86_EFLAGS_VM) ||
5400 (is_long_mode(vcpu) && !cs.l)) {
5401 kvm_queue_exception(vcpu, UD_VECTOR);
5402 return 0;
5403 }
5404
5405 if (vmx_get_cpl(vcpu)) {
5406 kvm_inject_gp(vcpu, 0);
5407 return 0;
5408 }
5409
5410 return 1;
5411}
5412
5413/*
5414 * Free whatever needs to be freed from vmx->nested when L1 goes down, or
5415 * just stops using VMX.
5416 */
5417static void free_nested(struct vcpu_vmx *vmx)
5418{
5419 if (!vmx->nested.vmxon)
5420 return;
5421 vmx->nested.vmxon = false;
a9d30f33
NHE		 5422 if (vmx->nested.current_vmptr != -1ull) {
5423 kunmap(vmx->nested.current_vmcs12_page);
5424 nested_release_page(vmx->nested.current_vmcs12_page);
5425 vmx->nested.current_vmptr = -1ull;
5426 vmx->nested.current_vmcs12 = NULL;
5427 }
fe3ef05c
NHE		 5428 /* Unpin physical memory we referred to in current vmcs02 */
5429 if (vmx->nested.apic_access_page) {
5430 nested_release_page(vmx->nested.apic_access_page);
5431 vmx->nested.apic_access_page = 0;
5432 }
ff2f6fe9
NHE		 5433
5434 nested_free_all_saved_vmcss(vmx);
ec378aee
NHE		 5435}
5436
5437/* Emulate the VMXOFF instruction */
5438static int handle_vmoff(struct kvm_vcpu *vcpu)
5439{
5440 if (!nested_vmx_check_permission(vcpu))
5441 return 1;
5442 free_nested(to_vmx(vcpu));
5443 skip_emulated_instruction(vcpu);
5444 return 1;
5445}
5446
064aea77
NHE		 5447/*
5448 * Decode the memory-address operand of a vmx instruction, as recorded on an
5449 * exit caused by such an instruction (run by a guest hypervisor).
5450 * On success, returns 0. When the operand is invalid, returns 1 and throws
5451 * #UD or #GP.
5452 */
5453static int get_vmx_mem_address(struct kvm_vcpu *vcpu,
5454 unsigned long exit_qualification,
5455 u32 vmx_instruction_info, gva_t *ret)
5456{
5457 /*
5458 * According to Vol. 3B, "Information for VM Exits Due to Instruction
5459 * Execution", on an exit, vmx_instruction_info holds most of the
5460 * addressing components of the operand. Only the displacement part
5461 * is put in exit_qualification (see 3B, "Basic VM-Exit Information").
5462 * For how an actual address is calculated from all these components,
5463 * refer to Vol. 1, "Operand Addressing".
5464 */
5465 int scaling = vmx_instruction_info & 3;
5466 int addr_size = (vmx_instruction_info >> 7) & 7;
5467 bool is_reg = vmx_instruction_info & (1u << 10);
5468 int seg_reg = (vmx_instruction_info >> 15) & 7;
5469 int index_reg = (vmx_instruction_info >> 18) & 0xf;
5470 bool index_is_valid = !(vmx_instruction_info & (1u << 22));
5471 int base_reg = (vmx_instruction_info >> 23) & 0xf;
5472 bool base_is_valid = !(vmx_instruction_info & (1u << 27));
5473
5474 if (is_reg) {
5475 kvm_queue_exception(vcpu, UD_VECTOR);
5476 return 1;
5477 }
5478
5479 /* Addr = segment_base + offset */
5480 /* offset = base + [index * scale] + displacement */
5481 *ret = vmx_get_segment_base(vcpu, seg_reg);
5482 if (base_is_valid)
5483 *ret += kvm_register_read(vcpu, base_reg);
5484 if (index_is_valid)
5485 *ret += kvm_register_read(vcpu, index_reg)<<scaling;
5486 *ret += exit_qualification; /* holds the displacement */
5487
5488 if (addr_size == 1) /* 32 bit */
5489 *ret &= 0xffffffff;
5490
5491 /*
5492 * TODO: throw #GP (and return 1) in various cases that the VM*
5493 * instructions require it - e.g., offset beyond segment limit,
5494 * unusable or unreadable/unwritable segment, non-canonical 64-bit
5495 * address, and so on. Currently these are not checked.
5496 */
5497 return 0;
5498}
5499
0140caea
NHE		 5500/*
5501 * The following 3 functions, nested_vmx_succeed()/failValid()/failInvalid(),
5502 * set the success or error code of an emulated VMX instruction, as specified
5503 * by Vol 2B, VMX Instruction Reference, "Conventions".
5504 */
5505static void nested_vmx_succeed(struct kvm_vcpu *vcpu)
5506{
5507 vmx_set_rflags(vcpu, vmx_get_rflags(vcpu)
5508 & ~(X86_EFLAGS_CF | X86_EFLAGS_PF | X86_EFLAGS_AF |
5509 X86_EFLAGS_ZF | X86_EFLAGS_SF | X86_EFLAGS_OF));
5510}
5511
5512static void nested_vmx_failInvalid(struct kvm_vcpu *vcpu)
5513{
5514 vmx_set_rflags(vcpu, (vmx_get_rflags(vcpu)
5515 & ~(X86_EFLAGS_PF | X86_EFLAGS_AF | X86_EFLAGS_ZF |
5516 X86_EFLAGS_SF | X86_EFLAGS_OF))
5517 | X86_EFLAGS_CF);
5518}
5519
5520static void nested_vmx_failValid(struct kvm_vcpu *vcpu,
5521 u32 vm_instruction_error)
5522{
5523 if (to_vmx(vcpu)->nested.current_vmptr == -1ull) {
5524 /*
5525 * failValid writes the error number to the current VMCS, which
5526 * can't be done there isn't a current VMCS.
5527 */
5528 nested_vmx_failInvalid(vcpu);
5529 return;
5530 }
5531 vmx_set_rflags(vcpu, (vmx_get_rflags(vcpu)
5532 & ~(X86_EFLAGS_CF | X86_EFLAGS_PF | X86_EFLAGS_AF |
5533 X86_EFLAGS_SF | X86_EFLAGS_OF))
5534 | X86_EFLAGS_ZF);
5535 get_vmcs12(vcpu)->vm_instruction_error = vm_instruction_error;
5536}
5537
27d6c865
NHE		 5538/* Emulate the VMCLEAR instruction */
5539static int handle_vmclear(struct kvm_vcpu *vcpu)
5540{
5541 struct vcpu_vmx *vmx = to_vmx(vcpu);
5542 gva_t gva;
5543 gpa_t vmptr;
5544 struct vmcs12 *vmcs12;
5545 struct page *page;
5546 struct x86_exception e;
5547
5548 if (!nested_vmx_check_permission(vcpu))
5549 return 1;
5550
5551 if (get_vmx_mem_address(vcpu, vmcs_readl(EXIT_QUALIFICATION),
5552 vmcs_read32(VMX_INSTRUCTION_INFO), &gva))
5553 return 1;
5554
5555 if (kvm_read_guest_virt(&vcpu->arch.emulate_ctxt, gva, &vmptr,
5556 sizeof(vmptr), &e)) {
5557 kvm_inject_page_fault(vcpu, &e);
5558 return 1;
5559 }
5560
5561 if (!IS_ALIGNED(vmptr, PAGE_SIZE)) {
5562 nested_vmx_failValid(vcpu, VMXERR_VMCLEAR_INVALID_ADDRESS);
5563 skip_emulated_instruction(vcpu);
5564 return 1;
5565 }
5566
5567 if (vmptr == vmx->nested.current_vmptr) {
5568 kunmap(vmx->nested.current_vmcs12_page);
5569 nested_release_page(vmx->nested.current_vmcs12_page);
5570 vmx->nested.current_vmptr = -1ull;
5571 vmx->nested.current_vmcs12 = NULL;
5572 }
5573
5574 page = nested_get_page(vcpu, vmptr);
5575 if (page == NULL) {
5576 /*
5577 * For accurate processor emulation, VMCLEAR beyond available
5578 * physical memory should do nothing at all. However, it is
5579 * possible that a nested vmx bug, not a guest hypervisor bug,
5580 * resulted in this case, so let's shut down before doing any
5581 * more damage:
5582 */
5583 kvm_make_request(KVM_REQ_TRIPLE_FAULT, vcpu);
5584 return 1;
5585 }
5586 vmcs12 = kmap(page);
5587 vmcs12->launch_state = 0;
5588 kunmap(page);
5589 nested_release_page(page);
5590
5591 nested_free_vmcs02(vmx, vmptr);
5592
5593 skip_emulated_instruction(vcpu);
5594 nested_vmx_succeed(vcpu);
5595 return 1;
5596}
5597
cd232ad0
NHE		 5598static int nested_vmx_run(struct kvm_vcpu *vcpu, bool launch);
5599
5600/* Emulate the VMLAUNCH instruction */
5601static int handle_vmlaunch(struct kvm_vcpu *vcpu)
5602{
5603 return nested_vmx_run(vcpu, true);
5604}
5605
5606/* Emulate the VMRESUME instruction */
5607static int handle_vmresume(struct kvm_vcpu *vcpu)
5608{
5609
5610 return nested_vmx_run(vcpu, false);
5611}
5612
49f705c5
NHE		 5613enum vmcs_field_type {
5614 VMCS_FIELD_TYPE_U16 = 0,
5615 VMCS_FIELD_TYPE_U64 = 1,
5616 VMCS_FIELD_TYPE_U32 = 2,
5617 VMCS_FIELD_TYPE_NATURAL_WIDTH = 3
5618};
5619
5620static inline int vmcs_field_type(unsigned long field)
5621{
5622 if (0x1 & field) /* the *_HIGH fields are all 32 bit */
5623 return VMCS_FIELD_TYPE_U32;
5624 return (field >> 13) & 0x3 ;
5625}
5626
5627static inline int vmcs_field_readonly(unsigned long field)
5628{
5629 return (((field >> 10) & 0x3) == 1);
5630}
5631
5632/*
5633 * Read a vmcs12 field. Since these can have varying lengths and we return
5634 * one type, we chose the biggest type (u64) and zero-extend the return value
5635 * to that size. Note that the caller, handle_vmread, might need to use only
5636 * some of the bits we return here (e.g., on 32-bit guests, only 32 bits of
5637 * 64-bit fields are to be returned).
5638 */
5639static inline bool vmcs12_read_any(struct kvm_vcpu *vcpu,
5640 unsigned long field, u64 *ret)
5641{
5642 short offset = vmcs_field_to_offset(field);
5643 char *p;
5644
5645 if (offset < 0)
5646 return 0;
5647
5648 p = ((char *)(get_vmcs12(vcpu))) + offset;
5649
5650 switch (vmcs_field_type(field)) {
5651 case VMCS_FIELD_TYPE_NATURAL_WIDTH:
5652 *ret = *((natural_width *)p);
5653 return 1;
5654 case VMCS_FIELD_TYPE_U16:
5655 *ret = *((u16 *)p);
5656 return 1;
5657 case VMCS_FIELD_TYPE_U32:
5658 *ret = *((u32 *)p);
5659 return 1;
5660 case VMCS_FIELD_TYPE_U64:
5661 *ret = *((u64 *)p);
5662 return 1;
5663 default:
5664 return 0; /* can never happen. */
5665 }
5666}
5667
5668/*
5669 * VMX instructions which assume a current vmcs12 (i.e., that VMPTRLD was
5670 * used before) all generate the same failure when it is missing.
5671 */
5672static int nested_vmx_check_vmcs12(struct kvm_vcpu *vcpu)
5673{
5674 struct vcpu_vmx *vmx = to_vmx(vcpu);
5675 if (vmx->nested.current_vmptr == -1ull) {
5676 nested_vmx_failInvalid(vcpu);
5677 skip_emulated_instruction(vcpu);
5678 return 0;
5679 }
5680 return 1;
5681}
5682
5683static int handle_vmread(struct kvm_vcpu *vcpu)
5684{
5685 unsigned long field;
5686 u64 field_value;
5687 unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
5688 u32 vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO);
5689 gva_t gva = 0;
5690
5691 if (!nested_vmx_check_permission(vcpu) ||
5692 !nested_vmx_check_vmcs12(vcpu))
5693 return 1;
5694
5695 /* Decode instruction info and find the field to read */
5696 field = kvm_register_read(vcpu, (((vmx_instruction_info) >> 28) & 0xf));
5697 /* Read the field, zero-extended to a u64 field_value */
5698 if (!vmcs12_read_any(vcpu, field, &field_value)) {
5699 nested_vmx_failValid(vcpu, VMXERR_UNSUPPORTED_VMCS_COMPONENT);
5700 skip_emulated_instruction(vcpu);
5701 return 1;
5702 }
5703 /*
5704 * Now copy part of this value to register or memory, as requested.
5705 * Note that the number of bits actually copied is 32 or 64 depending
5706 * on the guest's mode (32 or 64 bit), not on the given field's length.
5707 */
5708 if (vmx_instruction_info & (1u << 10)) {
5709 kvm_register_write(vcpu, (((vmx_instruction_info) >> 3) & 0xf),
5710 field_value);
5711 } else {
5712 if (get_vmx_mem_address(vcpu, exit_qualification,
5713 vmx_instruction_info, &gva))
5714 return 1;
5715 /* _system ok, as nested_vmx_check_permission verified cpl=0 */
5716 kvm_write_guest_virt_system(&vcpu->arch.emulate_ctxt, gva,
5717 &field_value, (is_long_mode(vcpu) ? 8 : 4), NULL);
5718 }
5719
5720 nested_vmx_succeed(vcpu);
5721 skip_emulated_instruction(vcpu);
5722 return 1;
5723}
5724
5725
5726static int handle_vmwrite(struct kvm_vcpu *vcpu)
5727{
5728 unsigned long field;
5729 gva_t gva;
5730 unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
5731 u32 vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO);
5732 char *p;
5733 short offset;
5734 /* The value to write might be 32 or 64 bits, depending on L1's long
5735 * mode, and eventually we need to write that into a field of several
5736 * possible lengths. The code below first zero-extends the value to 64
5737 * bit (field_value), and then copies only the approriate number of
5738 * bits into the vmcs12 field.
5739 */
5740 u64 field_value = 0;
5741 struct x86_exception e;
5742
5743 if (!nested_vmx_check_permission(vcpu) ||
5744 !nested_vmx_check_vmcs12(vcpu))
5745 return 1;
5746
5747 if (vmx_instruction_info & (1u << 10))
5748 field_value = kvm_register_read(vcpu,
5749 (((vmx_instruction_info) >> 3) & 0xf));
5750 else {
5751 if (get_vmx_mem_address(vcpu, exit_qualification,
5752 vmx_instruction_info, &gva))
5753 return 1;
5754 if (kvm_read_guest_virt(&vcpu->arch.emulate_ctxt, gva,
5755 &field_value, (is_long_mode(vcpu) ? 8 : 4), &e)) {
5756 kvm_inject_page_fault(vcpu, &e);
5757 return 1;
5758 }
5759 }
5760
5761
5762 field = kvm_register_read(vcpu, (((vmx_instruction_info) >> 28) & 0xf));
5763 if (vmcs_field_readonly(field)) {
5764 nested_vmx_failValid(vcpu,
5765 VMXERR_VMWRITE_READ_ONLY_VMCS_COMPONENT);
5766 skip_emulated_instruction(vcpu);
5767 return 1;
5768 }
5769
5770 offset = vmcs_field_to_offset(field);
5771 if (offset < 0) {
5772 nested_vmx_failValid(vcpu, VMXERR_UNSUPPORTED_VMCS_COMPONENT);
5773 skip_emulated_instruction(vcpu);
5774 return 1;
5775 }
5776 p = ((char *) get_vmcs12(vcpu)) + offset;
5777
5778 switch (vmcs_field_type(field)) {
5779 case VMCS_FIELD_TYPE_U16:
5780 *(u16 *)p = field_value;
5781 break;
5782 case VMCS_FIELD_TYPE_U32:
5783 *(u32 *)p = field_value;
5784 break;
5785 case VMCS_FIELD_TYPE_U64:
5786 *(u64 *)p = field_value;
5787 break;
5788 case VMCS_FIELD_TYPE_NATURAL_WIDTH:
5789 *(natural_width *)p = field_value;
5790 break;
5791 default:
5792 nested_vmx_failValid(vcpu, VMXERR_UNSUPPORTED_VMCS_COMPONENT);
5793 skip_emulated_instruction(vcpu);
5794 return 1;
5795 }
5796
5797 nested_vmx_succeed(vcpu);
5798 skip_emulated_instruction(vcpu);
5799 return 1;
5800}
5801
63846663
NHE		 5802/* Emulate the VMPTRLD instruction */
5803static int handle_vmptrld(struct kvm_vcpu *vcpu)
5804{
5805 struct vcpu_vmx *vmx = to_vmx(vcpu);
5806 gva_t gva;
5807 gpa_t vmptr;
5808 struct x86_exception e;
5809
5810 if (!nested_vmx_check_permission(vcpu))
5811 return 1;
5812
5813 if (get_vmx_mem_address(vcpu, vmcs_readl(EXIT_QUALIFICATION),
5814 vmcs_read32(VMX_INSTRUCTION_INFO), &gva))
5815 return 1;
5816
5817 if (kvm_read_guest_virt(&vcpu->arch.emulate_ctxt, gva, &vmptr,
5818 sizeof(vmptr), &e)) {
5819 kvm_inject_page_fault(vcpu, &e);
5820 return 1;
5821 }
5822
5823 if (!IS_ALIGNED(vmptr, PAGE_SIZE)) {
5824 nested_vmx_failValid(vcpu, VMXERR_VMPTRLD_INVALID_ADDRESS);
5825 skip_emulated_instruction(vcpu);
5826 return 1;
5827 }
5828
5829 if (vmx->nested.current_vmptr != vmptr) {
5830 struct vmcs12 *new_vmcs12;
5831 struct page *page;
5832 page = nested_get_page(vcpu, vmptr);
5833 if (page == NULL) {
5834 nested_vmx_failInvalid(vcpu);
5835 skip_emulated_instruction(vcpu);
5836 return 1;
5837 }
5838 new_vmcs12 = kmap(page);
5839 if (new_vmcs12->revision_id != VMCS12_REVISION) {
5840 kunmap(page);
5841 nested_release_page_clean(page);
5842 nested_vmx_failValid(vcpu,
5843 VMXERR_VMPTRLD_INCORRECT_VMCS_REVISION_ID);
5844 skip_emulated_instruction(vcpu);
5845 return 1;
5846 }
5847 if (vmx->nested.current_vmptr != -1ull) {
5848 kunmap(vmx->nested.current_vmcs12_page);
5849 nested_release_page(vmx->nested.current_vmcs12_page);
5850 }
5851
5852 vmx->nested.current_vmptr = vmptr;
5853 vmx->nested.current_vmcs12 = new_vmcs12;
5854 vmx->nested.current_vmcs12_page = page;
5855 }
5856
5857 nested_vmx_succeed(vcpu);
5858 skip_emulated_instruction(vcpu);
5859 return 1;
5860}
5861
6a4d7550
NHE		 5862/* Emulate the VMPTRST instruction */
5863static int handle_vmptrst(struct kvm_vcpu *vcpu)
5864{
5865 unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
5866 u32 vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO);
5867 gva_t vmcs_gva;
5868 struct x86_exception e;
5869
5870 if (!nested_vmx_check_permission(vcpu))
5871 return 1;
5872
5873 if (get_vmx_mem_address(vcpu, exit_qualification,
5874 vmx_instruction_info, &vmcs_gva))
5875 return 1;
5876 /* ok to use *_system, as nested_vmx_check_permission verified cpl=0 */
5877 if (kvm_write_guest_virt_system(&vcpu->arch.emulate_ctxt, vmcs_gva,
5878 (void *)&to_vmx(vcpu)->nested.current_vmptr,
5879 sizeof(u64), &e)) {
5880 kvm_inject_page_fault(vcpu, &e);
5881 return 1;
5882 }
5883 nested_vmx_succeed(vcpu);
5884 skip_emulated_instruction(vcpu);
5885 return 1;
5886}
5887
6aa8b732
AK		 5888/*
5889 * The exit handlers return 1 if the exit was handled fully and guest execution
5890 * may resume. Otherwise they set the kvm_run parameter to indicate what needs
5891 * to be done to userspace and return 0.
5892 */
772e0318 5893static int (*const kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu) = {
6aa8b732
AK		 5894 [EXIT_REASON_EXCEPTION_NMI] = handle_exception,
5895 [EXIT_REASON_EXTERNAL_INTERRUPT] = handle_external_interrupt,
988ad74f 5896 [EXIT_REASON_TRIPLE_FAULT] = handle_triple_fault,
f08864b4 5897 [EXIT_REASON_NMI_WINDOW] = handle_nmi_window,
6aa8b732 5898 [EXIT_REASON_IO_INSTRUCTION] = handle_io,
6aa8b732
AK		 5899 [EXIT_REASON_CR_ACCESS] = handle_cr,
5900 [EXIT_REASON_DR_ACCESS] = handle_dr,
5901 [EXIT_REASON_CPUID] = handle_cpuid,
5902 [EXIT_REASON_MSR_READ] = handle_rdmsr,
5903 [EXIT_REASON_MSR_WRITE] = handle_wrmsr,
5904 [EXIT_REASON_PENDING_INTERRUPT] = handle_interrupt_window,
5905 [EXIT_REASON_HLT] = handle_halt,
ec25d5e6 5906 [EXIT_REASON_INVD] = handle_invd,
a7052897 5907 [EXIT_REASON_INVLPG] = handle_invlpg,
fee84b07 5908 [EXIT_REASON_RDPMC] = handle_rdpmc,
c21415e8 5909 [EXIT_REASON_VMCALL] = handle_vmcall,
27d6c865 5910 [EXIT_REASON_VMCLEAR] = handle_vmclear,
cd232ad0 5911 [EXIT_REASON_VMLAUNCH] = handle_vmlaunch,
63846663 5912 [EXIT_REASON_VMPTRLD] = handle_vmptrld,
6a4d7550 5913 [EXIT_REASON_VMPTRST] = handle_vmptrst,
49f705c5 5914 [EXIT_REASON_VMREAD] = handle_vmread,
cd232ad0 5915 [EXIT_REASON_VMRESUME] = handle_vmresume,
49f705c5 5916 [EXIT_REASON_VMWRITE] = handle_vmwrite,
ec378aee
NHE		 5917 [EXIT_REASON_VMOFF] = handle_vmoff,
5918 [EXIT_REASON_VMON] = handle_vmon,
f78e0e2e
SY		 5919 [EXIT_REASON_TPR_BELOW_THRESHOLD] = handle_tpr_below_threshold,
5920 [EXIT_REASON_APIC_ACCESS] = handle_apic_access,
83d4c286 5921 [EXIT_REASON_APIC_WRITE] = handle_apic_write,
c7c9c56c 5922 [EXIT_REASON_EOI_INDUCED] = handle_apic_eoi_induced,
e5edaa01 5923 [EXIT_REASON_WBINVD] = handle_wbinvd,
2acf923e 5924 [EXIT_REASON_XSETBV] = handle_xsetbv,
37817f29 5925 [EXIT_REASON_TASK_SWITCH] = handle_task_switch,
a0861c02 5926 [EXIT_REASON_MCE_DURING_VMENTRY] = handle_machine_check,
68f89400
MT		 5927 [EXIT_REASON_EPT_VIOLATION] = handle_ept_violation,
5928 [EXIT_REASON_EPT_MISCONFIG] = handle_ept_misconfig,
4b8d54f9 5929 [EXIT_REASON_PAUSE_INSTRUCTION] = handle_pause,
59708670
SY		 5930 [EXIT_REASON_MWAIT_INSTRUCTION] = handle_invalid_op,
5931 [EXIT_REASON_MONITOR_INSTRUCTION] = handle_invalid_op,
6aa8b732
AK		 5932};
5933
5934static const int kvm_vmx_max_exit_handlers =
50a3485c 5935 ARRAY_SIZE(kvm_vmx_exit_handlers);
6aa8b732 5936
908a7bdd
JK		 5937static bool nested_vmx_exit_handled_io(struct kvm_vcpu *vcpu,
5938 struct vmcs12 *vmcs12)
5939{
5940 unsigned long exit_qualification;
5941 gpa_t bitmap, last_bitmap;
5942 unsigned int port;
5943 int size;
5944 u8 b;
5945
5946 if (nested_cpu_has(vmcs12, CPU_BASED_UNCOND_IO_EXITING))
5947 return 1;
5948
5949 if (!nested_cpu_has(vmcs12, CPU_BASED_USE_IO_BITMAPS))
5950 return 0;
5951
5952 exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
5953
5954 port = exit_qualification >> 16;
5955 size = (exit_qualification & 7) + 1;
5956
5957 last_bitmap = (gpa_t)-1;
5958 b = -1;
5959
5960 while (size > 0) {
5961 if (port < 0x8000)
5962 bitmap = vmcs12->io_bitmap_a;
5963 else if (port < 0x10000)
5964 bitmap = vmcs12->io_bitmap_b;
5965 else
5966 return 1;
5967 bitmap += (port & 0x7fff) / 8;
5968
5969 if (last_bitmap != bitmap)
5970 if (kvm_read_guest(vcpu->kvm, bitmap, &b, 1))
5971 return 1;
5972 if (b & (1 << (port & 7)))
5973 return 1;
5974
5975 port++;
5976 size--;
5977 last_bitmap = bitmap;
5978 }
5979
5980 return 0;
5981}
5982
644d711a
NHE		 5983/*
5984 * Return 1 if we should exit from L2 to L1 to handle an MSR access access,
5985 * rather than handle it ourselves in L0. I.e., check whether L1 expressed
5986 * disinterest in the current event (read or write a specific MSR) by using an
5987 * MSR bitmap. This may be the case even when L0 doesn't use MSR bitmaps.
5988 */
5989static bool nested_vmx_exit_handled_msr(struct kvm_vcpu *vcpu,
5990 struct vmcs12 *vmcs12, u32 exit_reason)
5991{
5992 u32 msr_index = vcpu->arch.regs[VCPU_REGS_RCX];
5993 gpa_t bitmap;
5994
cbd29cb6 5995 if (!nested_cpu_has(vmcs12, CPU_BASED_USE_MSR_BITMAPS))
644d711a
NHE		 5996 return 1;
5997
5998 /*
5999 * The MSR_BITMAP page is divided into four 1024-byte bitmaps,
6000 * for the four combinations of read/write and low/high MSR numbers.
6001 * First we need to figure out which of the four to use:
6002 */
6003 bitmap = vmcs12->msr_bitmap;
6004 if (exit_reason == EXIT_REASON_MSR_WRITE)
6005 bitmap += 2048;
6006 if (msr_index >= 0xc0000000) {
6007 msr_index -= 0xc0000000;
6008 bitmap += 1024;
6009 }
6010
6011 /* Then read the msr_index'th bit from this bitmap: */
6012 if (msr_index < 1024*8) {
6013 unsigned char b;
bd31a7f5
JK		 6014 if (kvm_read_guest(vcpu->kvm, bitmap + msr_index/8, &b, 1))
6015 return 1;
644d711a
NHE		 6016 return 1 & (b >> (msr_index & 7));
6017 } else
6018 return 1; /* let L1 handle the wrong parameter */
6019}
6020
6021/*
6022 * Return 1 if we should exit from L2 to L1 to handle a CR access exit,
6023 * rather than handle it ourselves in L0. I.e., check if L1 wanted to
6024 * intercept (via guest_host_mask etc.) the current event.
6025 */
6026static bool nested_vmx_exit_handled_cr(struct kvm_vcpu *vcpu,
6027 struct vmcs12 *vmcs12)
6028{
6029 unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
6030 int cr = exit_qualification & 15;
6031 int reg = (exit_qualification >> 8) & 15;
6032 unsigned long val = kvm_register_read(vcpu, reg);
6033
6034 switch ((exit_qualification >> 4) & 3) {
6035 case 0: /* mov to cr */
6036 switch (cr) {
6037 case 0:
6038 if (vmcs12->cr0_guest_host_mask &
6039 (val ^ vmcs12->cr0_read_shadow))
6040 return 1;
6041 break;
6042 case 3:
6043 if ((vmcs12->cr3_target_count >= 1 &&
6044 vmcs12->cr3_target_value0 == val) ||
6045 (vmcs12->cr3_target_count >= 2 &&
6046 vmcs12->cr3_target_value1 == val) ||
6047 (vmcs12->cr3_target_count >= 3 &&
6048 vmcs12->cr3_target_value2 == val) ||
6049 (vmcs12->cr3_target_count >= 4 &&
6050 vmcs12->cr3_target_value3 == val))
6051 return 0;
6052 if (nested_cpu_has(vmcs12, CPU_BASED_CR3_LOAD_EXITING))
6053 return 1;
6054 break;
6055 case 4:
6056 if (vmcs12->cr4_guest_host_mask &
6057 (vmcs12->cr4_read_shadow ^ val))
6058 return 1;
6059 break;
6060 case 8:
6061 if (nested_cpu_has(vmcs12, CPU_BASED_CR8_LOAD_EXITING))
6062 return 1;
6063 break;
6064 }
6065 break;
6066 case 2: /* clts */
6067 if ((vmcs12->cr0_guest_host_mask & X86_CR0_TS) &&
6068 (vmcs12->cr0_read_shadow & X86_CR0_TS))
6069 return 1;
6070 break;
6071 case 1: /* mov from cr */
6072 switch (cr) {
6073 case 3:
6074 if (vmcs12->cpu_based_vm_exec_control &
6075 CPU_BASED_CR3_STORE_EXITING)
6076 return 1;
6077 break;
6078 case 8:
6079 if (vmcs12->cpu_based_vm_exec_control &
6080 CPU_BASED_CR8_STORE_EXITING)
6081 return 1;
6082 break;
6083 }
6084 break;
6085 case 3: /* lmsw */
6086 /*
6087 * lmsw can change bits 1..3 of cr0, and only set bit 0 of
6088 * cr0. Other attempted changes are ignored, with no exit.
6089 */
6090 if (vmcs12->cr0_guest_host_mask & 0xe &
6091 (val ^ vmcs12->cr0_read_shadow))
6092 return 1;
6093 if ((vmcs12->cr0_guest_host_mask & 0x1) &&
6094 !(vmcs12->cr0_read_shadow & 0x1) &&
6095 (val & 0x1))
6096 return 1;
6097 break;
6098 }
6099 return 0;
6100}
6101
6102/*
6103 * Return 1 if we should exit from L2 to L1 to handle an exit, or 0 if we
6104 * should handle it ourselves in L0 (and then continue L2). Only call this
6105 * when in is_guest_mode (L2).
6106 */
6107static bool nested_vmx_exit_handled(struct kvm_vcpu *vcpu)
6108{
644d711a
NHE		 6109 u32 intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
6110 struct vcpu_vmx *vmx = to_vmx(vcpu);
6111 struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
957c897e 6112 u32 exit_reason = vmx->exit_reason;
644d711a
NHE		 6113
6114 if (vmx->nested.nested_run_pending)
6115 return 0;
6116
6117 if (unlikely(vmx->fail)) {
bd80158a
JK		 6118 pr_info_ratelimited("%s failed vm entry %x\n", __func__,
6119 vmcs_read32(VM_INSTRUCTION_ERROR));
644d711a
NHE		 6120 return 1;
6121 }
6122
6123 switch (exit_reason) {
6124 case EXIT_REASON_EXCEPTION_NMI:
6125 if (!is_exception(intr_info))
6126 return 0;
6127 else if (is_page_fault(intr_info))
6128 return enable_ept;
6129 return vmcs12->exception_bitmap &
6130 (1u << (intr_info & INTR_INFO_VECTOR_MASK));
6131 case EXIT_REASON_EXTERNAL_INTERRUPT:
6132 return 0;
6133 case EXIT_REASON_TRIPLE_FAULT:
6134 return 1;
6135 case EXIT_REASON_PENDING_INTERRUPT:
6136 case EXIT_REASON_NMI_WINDOW:
6137 /*
6138 * prepare_vmcs02() set the CPU_BASED_VIRTUAL_INTR_PENDING bit
6139 * (aka Interrupt Window Exiting) only when L1 turned it on,
6140 * so if we got a PENDING_INTERRUPT exit, this must be for L1.
6141 * Same for NMI Window Exiting.
6142 */
6143 return 1;
6144 case EXIT_REASON_TASK_SWITCH:
6145 return 1;
6146 case EXIT_REASON_CPUID:
6147 return 1;
6148 case EXIT_REASON_HLT:
6149 return nested_cpu_has(vmcs12, CPU_BASED_HLT_EXITING);
6150 case EXIT_REASON_INVD:
6151 return 1;
6152 case EXIT_REASON_INVLPG:
6153 return nested_cpu_has(vmcs12, CPU_BASED_INVLPG_EXITING);
6154 case EXIT_REASON_RDPMC:
6155 return nested_cpu_has(vmcs12, CPU_BASED_RDPMC_EXITING);
6156 case EXIT_REASON_RDTSC:
6157 return nested_cpu_has(vmcs12, CPU_BASED_RDTSC_EXITING);
6158 case EXIT_REASON_VMCALL: case EXIT_REASON_VMCLEAR:
6159 case EXIT_REASON_VMLAUNCH: case EXIT_REASON_VMPTRLD:
6160 case EXIT_REASON_VMPTRST: case EXIT_REASON_VMREAD:
6161 case EXIT_REASON_VMRESUME: case EXIT_REASON_VMWRITE:
6162 case EXIT_REASON_VMOFF: case EXIT_REASON_VMON:
6163 /*
6164 * VMX instructions trap unconditionally. This allows L1 to
6165 * emulate them for its L2 guest, i.e., allows 3-level nesting!
6166 */
6167 return 1;
6168 case EXIT_REASON_CR_ACCESS:
6169 return nested_vmx_exit_handled_cr(vcpu, vmcs12);
6170 case EXIT_REASON_DR_ACCESS:
6171 return nested_cpu_has(vmcs12, CPU_BASED_MOV_DR_EXITING);
6172 case EXIT_REASON_IO_INSTRUCTION:
908a7bdd 6173 return nested_vmx_exit_handled_io(vcpu, vmcs12);
644d711a
NHE		 6174 case EXIT_REASON_MSR_READ:
6175 case EXIT_REASON_MSR_WRITE:
6176 return nested_vmx_exit_handled_msr(vcpu, vmcs12, exit_reason);
6177 case EXIT_REASON_INVALID_STATE:
6178 return 1;
6179 case EXIT_REASON_MWAIT_INSTRUCTION:
6180 return nested_cpu_has(vmcs12, CPU_BASED_MWAIT_EXITING);
6181 case EXIT_REASON_MONITOR_INSTRUCTION:
6182 return nested_cpu_has(vmcs12, CPU_BASED_MONITOR_EXITING);
6183 case EXIT_REASON_PAUSE_INSTRUCTION:
6184 return nested_cpu_has(vmcs12, CPU_BASED_PAUSE_EXITING) ||
6185 nested_cpu_has2(vmcs12,
6186 SECONDARY_EXEC_PAUSE_LOOP_EXITING);
6187 case EXIT_REASON_MCE_DURING_VMENTRY:
6188 return 0;
6189 case EXIT_REASON_TPR_BELOW_THRESHOLD:
6190 return 1;
6191 case EXIT_REASON_APIC_ACCESS:
6192 return nested_cpu_has2(vmcs12,
6193 SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES);
6194 case EXIT_REASON_EPT_VIOLATION:
6195 case EXIT_REASON_EPT_MISCONFIG:
6196 return 0;
0238ea91
JK		 6197 case EXIT_REASON_PREEMPTION_TIMER:
6198 return vmcs12->pin_based_vm_exec_control &
6199 PIN_BASED_VMX_PREEMPTION_TIMER;
644d711a
NHE		 6200 case EXIT_REASON_WBINVD:
6201 return nested_cpu_has2(vmcs12, SECONDARY_EXEC_WBINVD_EXITING);
6202 case EXIT_REASON_XSETBV:
6203 return 1;
6204 default:
6205 return 1;
6206 }
6207}
6208
586f9607
AK		 6209static void vmx_get_exit_info(struct kvm_vcpu *vcpu, u64 *info1, u64 *info2)
6210{
6211 *info1 = vmcs_readl(EXIT_QUALIFICATION);
6212 *info2 = vmcs_read32(VM_EXIT_INTR_INFO);
6213}
6214
6aa8b732
AK		 6215/*
6216 * The guest has exited. See if we can fix it or if we need userspace
6217 * assistance.
6218 */
851ba692 6219static int vmx_handle_exit(struct kvm_vcpu *vcpu)
6aa8b732 6220{
29bd8a78 6221 struct vcpu_vmx *vmx = to_vmx(vcpu);
a0861c02 6222 u32 exit_reason = vmx->exit_reason;
1155f76a 6223 u32 vectoring_info = vmx->idt_vectoring_info;
29bd8a78 6224
80ced186 6225 /* If guest state is invalid, start emulating */
14168786 6226 if (vmx->emulation_required)
80ced186 6227 return handle_invalid_guest_state(vcpu);
1d5a4d9b 6228
b6f1250e
NHE		 6229 /*
6230 * the KVM_REQ_EVENT optimization bit is only on for one entry, and if
6231 * we did not inject a still-pending event to L1 now because of
6232 * nested_run_pending, we need to re-enable this bit.
6233 */
6234 if (vmx->nested.nested_run_pending)
6235 kvm_make_request(KVM_REQ_EVENT, vcpu);
6236
509c75ea
NHE		 6237 if (!is_guest_mode(vcpu) && (exit_reason == EXIT_REASON_VMLAUNCH ||
6238 exit_reason == EXIT_REASON_VMRESUME))
644d711a
NHE		 6239 vmx->nested.nested_run_pending = 1;
6240 else
6241 vmx->nested.nested_run_pending = 0;
6242
6243 if (is_guest_mode(vcpu) && nested_vmx_exit_handled(vcpu)) {
6244 nested_vmx_vmexit(vcpu);
6245 return 1;
6246 }
6247
5120702e
MG		 6248 if (exit_reason & VMX_EXIT_REASONS_FAILED_VMENTRY) {
6249 vcpu->run->exit_reason = KVM_EXIT_FAIL_ENTRY;
6250 vcpu->run->fail_entry.hardware_entry_failure_reason
6251 = exit_reason;
6252 return 0;
6253 }
6254
29bd8a78 6255 if (unlikely(vmx->fail)) {
851ba692
AK		 6256 vcpu->run->exit_reason = KVM_EXIT_FAIL_ENTRY;
6257 vcpu->run->fail_entry.hardware_entry_failure_reason
29bd8a78
AK		 6258 = vmcs_read32(VM_INSTRUCTION_ERROR);
6259 return 0;
6260 }
6aa8b732 6261
b9bf6882
XG		 6262 /*
6263 * Note:
6264 * Do not try to fix EXIT_REASON_EPT_MISCONFIG if it caused by
6265 * delivery event since it indicates guest is accessing MMIO.
6266 * The vm-exit can be triggered again after return to guest that
6267 * will cause infinite loop.
6268 */
d77c26fc 6269 if ((vectoring_info & VECTORING_INFO_VALID_MASK) &&
1439442c 6270 (exit_reason != EXIT_REASON_EXCEPTION_NMI &&
60637aac 6271 exit_reason != EXIT_REASON_EPT_VIOLATION &&
b9bf6882
XG		 6272 exit_reason != EXIT_REASON_TASK_SWITCH)) {
6273 vcpu->run->exit_reason = KVM_EXIT_INTERNAL_ERROR;
6274 vcpu->run->internal.suberror = KVM_INTERNAL_ERROR_DELIVERY_EV;
6275 vcpu->run->internal.ndata = 2;
6276 vcpu->run->internal.data[0] = vectoring_info;
6277 vcpu->run->internal.data[1] = exit_reason;
6278 return 0;
6279 }
3b86cd99 6280
644d711a
NHE		 6281 if (unlikely(!cpu_has_virtual_nmis() && vmx->soft_vnmi_blocked &&
6282 !(is_guest_mode(vcpu) && nested_cpu_has_virtual_nmis(
6283 get_vmcs12(vcpu), vcpu)))) {
c4282df9 6284 if (vmx_interrupt_allowed(vcpu)) {
3b86cd99 6285 vmx->soft_vnmi_blocked = 0;
3b86cd99 6286 } else if (vmx->vnmi_blocked_time > 1000000000LL &&
4531220b 6287 vcpu->arch.nmi_pending) {
3b86cd99
JK		 6288 /*
6289 * This CPU don't support us in finding the end of an
6290 * NMI-blocked window if the guest runs with IRQs
6291 * disabled. So we pull the trigger after 1 s of
6292 * futile waiting, but inform the user about this.
6293 */
6294 printk(KERN_WARNING "%s: Breaking out of NMI-blocked "
6295 "state on VCPU %d after 1 s timeout\n",
6296 __func__, vcpu->vcpu_id);
6297 vmx->soft_vnmi_blocked = 0;
3b86cd99 6298 }
3b86cd99
JK		 6299 }
6300
6aa8b732
AK		 6301 if (exit_reason < kvm_vmx_max_exit_handlers
6302 && kvm_vmx_exit_handlers[exit_reason])
851ba692 6303 return kvm_vmx_exit_handlers[exit_reason](vcpu);
6aa8b732 6304 else {
851ba692
AK		 6305 vcpu->run->exit_reason = KVM_EXIT_UNKNOWN;
6306 vcpu->run->hw.hardware_exit_reason = exit_reason;
6aa8b732
AK		 6307 }
6308 return 0;
6309}
6310
95ba8273 6311static void update_cr8_intercept(struct kvm_vcpu *vcpu, int tpr, int irr)
6e5d865c 6312{
95ba8273 6313 if (irr == -1 || tpr < irr) {
6e5d865c
YS		 6314 vmcs_write32(TPR_THRESHOLD, 0);
6315 return;
6316 }
6317
95ba8273 6318 vmcs_write32(TPR_THRESHOLD, irr);
6e5d865c
YS		 6319}
6320
8d14695f
YZ		 6321static void vmx_set_virtual_x2apic_mode(struct kvm_vcpu *vcpu, bool set)
6322{
6323 u32 sec_exec_control;
6324
6325 /*
6326 * There is not point to enable virtualize x2apic without enable
6327 * apicv
6328 */
c7c9c56c
YZ		 6329 if (!cpu_has_vmx_virtualize_x2apic_mode() ||
6330 !vmx_vm_has_apicv(vcpu->kvm))
8d14695f
YZ		 6331 return;
6332
6333 if (!vm_need_tpr_shadow(vcpu->kvm))
6334 return;
6335
6336 sec_exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL);
6337
6338 if (set) {
6339 sec_exec_control &= ~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES;
6340 sec_exec_control |= SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE;
6341 } else {
6342 sec_exec_control &= ~SECONDARY_EXEC_VIRTUALIZE_X2APIC_MODE;
6343 sec_exec_control |= SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES;
6344 }
6345 vmcs_write32(SECONDARY_VM_EXEC_CONTROL, sec_exec_control);
6346
6347 vmx_set_msr_bitmap(vcpu);
6348}
6349
c7c9c56c
YZ		 6350static void vmx_hwapic_isr_update(struct kvm *kvm, int isr)
6351{
6352 u16 status;
6353 u8 old;
6354
6355 if (!vmx_vm_has_apicv(kvm))
6356 return;
6357
6358 if (isr == -1)
6359 isr = 0;
6360
6361 status = vmcs_read16(GUEST_INTR_STATUS);
6362 old = status >> 8;
6363 if (isr != old) {
6364 status &= 0xff;
6365 status |= isr << 8;
6366 vmcs_write16(GUEST_INTR_STATUS, status);
6367 }
6368}
6369
6370static void vmx_set_rvi(int vector)
6371{
6372 u16 status;
6373 u8 old;
6374
6375 status = vmcs_read16(GUEST_INTR_STATUS);
6376 old = (u8)status & 0xff;
6377 if ((u8)vector != old) {
6378 status &= ~0xff;
6379 status |= (u8)vector;
6380 vmcs_write16(GUEST_INTR_STATUS, status);
6381 }
6382}
6383
6384static void vmx_hwapic_irr_update(struct kvm_vcpu *vcpu, int max_irr)
6385{
6386 if (max_irr == -1)
6387 return;
6388
6389 vmx_set_rvi(max_irr);
6390}
6391
6392static void vmx_load_eoi_exitmap(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap)
6393{
6394 vmcs_write64(EOI_EXIT_BITMAP0, eoi_exit_bitmap[0]);
6395 vmcs_write64(EOI_EXIT_BITMAP1, eoi_exit_bitmap[1]);
6396 vmcs_write64(EOI_EXIT_BITMAP2, eoi_exit_bitmap[2]);
6397 vmcs_write64(EOI_EXIT_BITMAP3, eoi_exit_bitmap[3]);
6398}
6399
51aa01d1 6400static void vmx_complete_atomic_exit(struct vcpu_vmx *vmx)
cf393f75 6401{
00eba012
AK		 6402 u32 exit_intr_info;
6403
6404 if (!(vmx->exit_reason == EXIT_REASON_MCE_DURING_VMENTRY
6405 || vmx->exit_reason == EXIT_REASON_EXCEPTION_NMI))
6406 return;
6407
c5ca8e57 6408 vmx->exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
00eba012 6409 exit_intr_info = vmx->exit_intr_info;
a0861c02
AK		 6410
6411 /* Handle machine checks before interrupts are enabled */
00eba012 6412 if (is_machine_check(exit_intr_info))
a0861c02
AK		 6413 kvm_machine_check();
6414
20f65983 6415 /* We need to handle NMIs before interrupts are enabled */
00eba012 6416 if ((exit_intr_info & INTR_INFO_INTR_TYPE_MASK) == INTR_TYPE_NMI_INTR &&
ff9d07a0
ZY		 6417 (exit_intr_info & INTR_INFO_VALID_MASK)) {
6418 kvm_before_handle_nmi(&vmx->vcpu);
20f65983 6419 asm("int $2");
ff9d07a0
ZY		 6420 kvm_after_handle_nmi(&vmx->vcpu);
6421 }
51aa01d1 6422}
20f65983 6423
51aa01d1
AK		 6424static void vmx_recover_nmi_blocking(struct vcpu_vmx *vmx)
6425{
c5ca8e57 6426 u32 exit_intr_info;
51aa01d1
AK		 6427 bool unblock_nmi;
6428 u8 vector;
6429 bool idtv_info_valid;
6430
6431 idtv_info_valid = vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK;
20f65983 6432
cf393f75 6433 if (cpu_has_virtual_nmis()) {
9d58b931
AK		 6434 if (vmx->nmi_known_unmasked)
6435 return;
c5ca8e57
AK		 6436 /*
6437 * Can't use vmx->exit_intr_info since we're not sure what
6438 * the exit reason is.
6439 */
6440 exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
cf393f75
AK		 6441 unblock_nmi = (exit_intr_info & INTR_INFO_UNBLOCK_NMI) != 0;
6442 vector = exit_intr_info & INTR_INFO_VECTOR_MASK;
6443 /*
7b4a25cb 6444 * SDM 3: 27.7.1.2 (September 2008)
cf393f75
AK		 6445 * Re-set bit "block by NMI" before VM entry if vmexit caused by
6446 * a guest IRET fault.
7b4a25cb
GN		 6447 * SDM 3: 23.2.2 (September 2008)
6448 * Bit 12 is undefined in any of the following cases:
6449 * If the VM exit sets the valid bit in the IDT-vectoring
6450 * information field.
6451 * If the VM exit is due to a double fault.
cf393f75 6452 */
7b4a25cb
GN		 6453 if ((exit_intr_info & INTR_INFO_VALID_MASK) && unblock_nmi &&
6454 vector != DF_VECTOR && !idtv_info_valid)
cf393f75
AK		 6455 vmcs_set_bits(GUEST_INTERRUPTIBILITY_INFO,
6456 GUEST_INTR_STATE_NMI);
9d58b931
AK		 6457 else
6458 vmx->nmi_known_unmasked =
6459 !(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO)
6460 & GUEST_INTR_STATE_NMI);
3b86cd99
JK		 6461 } else if (unlikely(vmx->soft_vnmi_blocked))
6462 vmx->vnmi_blocked_time +=
6463 ktime_to_ns(ktime_sub(ktime_get(), vmx->entry_time));
51aa01d1
AK		 6464}
6465
3ab66e8a 6466static void __vmx_complete_interrupts(struct kvm_vcpu *vcpu,
83422e17
AK		 6467 u32 idt_vectoring_info,
6468 int instr_len_field,
6469 int error_code_field)
51aa01d1 6470{
51aa01d1
AK		 6471 u8 vector;
6472 int type;
6473 bool idtv_info_valid;
6474
6475 idtv_info_valid = idt_vectoring_info & VECTORING_INFO_VALID_MASK;
668f612f 6476
3ab66e8a
JK		 6477 vcpu->arch.nmi_injected = false;
6478 kvm_clear_exception_queue(vcpu);
6479 kvm_clear_interrupt_queue(vcpu);
37b96e98
GN		 6480
6481 if (!idtv_info_valid)
6482 return;
6483
3ab66e8a 6484 kvm_make_request(KVM_REQ_EVENT, vcpu);
3842d135 6485
668f612f
AK		 6486 vector = idt_vectoring_info & VECTORING_INFO_VECTOR_MASK;
6487 type = idt_vectoring_info & VECTORING_INFO_TYPE_MASK;
37b96e98 6488
64a7ec06 6489 switch (type) {
37b96e98 6490 case INTR_TYPE_NMI_INTR:
3ab66e8a 6491 vcpu->arch.nmi_injected = true;
668f612f 6492 /*
7b4a25cb 6493 * SDM 3: 27.7.1.2 (September 2008)
37b96e98
GN		 6494 * Clear bit "block by NMI" before VM entry if a NMI
6495 * delivery faulted.
668f612f 6496 */
3ab66e8a 6497 vmx_set_nmi_mask(vcpu, false);
37b96e98 6498 break;
37b96e98 6499 case INTR_TYPE_SOFT_EXCEPTION:
3ab66e8a 6500 vcpu->arch.event_exit_inst_len = vmcs_read32(instr_len_field);
66fd3f7f
GN		 6501 /* fall through */
6502 case INTR_TYPE_HARD_EXCEPTION:
35920a35 6503 if (idt_vectoring_info & VECTORING_INFO_DELIVER_CODE_MASK) {
83422e17 6504 u32 err = vmcs_read32(error_code_field);
3ab66e8a 6505 kvm_queue_exception_e(vcpu, vector, err);
35920a35 6506 } else
3ab66e8a 6507 kvm_queue_exception(vcpu, vector);
37b96e98 6508 break;
66fd3f7f 6509 case INTR_TYPE_SOFT_INTR:
3ab66e8a 6510 vcpu->arch.event_exit_inst_len = vmcs_read32(instr_len_field);
66fd3f7f 6511 /* fall through */
37b96e98 6512 case INTR_TYPE_EXT_INTR:
3ab66e8a 6513 kvm_queue_interrupt(vcpu, vector, type == INTR_TYPE_SOFT_INTR);
37b96e98
GN		 6514 break;
6515 default:
6516 break;
f7d9238f 6517 }
cf393f75
AK		 6518}
6519
83422e17
AK		 6520static void vmx_complete_interrupts(struct vcpu_vmx *vmx)
6521{
66c78ae4
NHE		 6522 if (is_guest_mode(&vmx->vcpu))
6523 return;
3ab66e8a 6524 __vmx_complete_interrupts(&vmx->vcpu, vmx->idt_vectoring_info,
83422e17
AK		 6525 VM_EXIT_INSTRUCTION_LEN,
6526 IDT_VECTORING_ERROR_CODE);
6527}
6528
b463a6f7
AK		 6529static void vmx_cancel_injection(struct kvm_vcpu *vcpu)
6530{
66c78ae4
NHE		 6531 if (is_guest_mode(vcpu))
6532 return;
3ab66e8a 6533 __vmx_complete_interrupts(vcpu,
b463a6f7
AK		 6534 vmcs_read32(VM_ENTRY_INTR_INFO_FIELD),
6535 VM_ENTRY_INSTRUCTION_LEN,
6536 VM_ENTRY_EXCEPTION_ERROR_CODE);
6537
6538 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0);
6539}
6540
d7cd9796
GN		 6541static void atomic_switch_perf_msrs(struct vcpu_vmx *vmx)
6542{
6543 int i, nr_msrs;
6544 struct perf_guest_switch_msr *msrs;
6545
6546 msrs = perf_guest_get_msrs(&nr_msrs);
6547
6548 if (!msrs)
6549 return;
6550
6551 for (i = 0; i < nr_msrs; i++)
6552 if (msrs[i].host == msrs[i].guest)
6553 clear_atomic_switch_msr(vmx, msrs[i].msr);
6554 else
6555 add_atomic_switch_msr(vmx, msrs[i].msr, msrs[i].guest,
6556 msrs[i].host);
6557}
6558
a3b5ba49 6559static void __noclone vmx_vcpu_run(struct kvm_vcpu *vcpu)
6aa8b732 6560{
a2fa3e9f 6561 struct vcpu_vmx *vmx = to_vmx(vcpu);
2a7921b7 6562 unsigned long debugctlmsr;
104f226b 6563
66c78ae4
NHE		 6564 if (is_guest_mode(vcpu) && !vmx->nested.nested_run_pending) {
6565 struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
6566 if (vmcs12->idt_vectoring_info_field &
6567 VECTORING_INFO_VALID_MASK) {
6568 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
6569 vmcs12->idt_vectoring_info_field);
6570 vmcs_write32(VM_ENTRY_INSTRUCTION_LEN,
6571 vmcs12->vm_exit_instruction_len);
6572 if (vmcs12->idt_vectoring_info_field &
6573 VECTORING_INFO_DELIVER_CODE_MASK)
6574 vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE,
6575 vmcs12->idt_vectoring_error_code);
6576 }
6577 }
6578
104f226b
AK		 6579 /* Record the guest's net vcpu time for enforced NMI injections. */
6580 if (unlikely(!cpu_has_virtual_nmis() && vmx->soft_vnmi_blocked))
6581 vmx->entry_time = ktime_get();
6582
6583 /* Don't enter VMX if guest state is invalid, let the exit handler
6584 start emulation until we arrive back to a valid state */
14168786 6585 if (vmx->emulation_required)
104f226b
AK		 6586 return;
6587
6588 if (test_bit(VCPU_REGS_RSP, (unsigned long *)&vcpu->arch.regs_dirty))
6589 vmcs_writel(GUEST_RSP, vcpu->arch.regs[VCPU_REGS_RSP]);
6590 if (test_bit(VCPU_REGS_RIP, (unsigned long *)&vcpu->arch.regs_dirty))
6591 vmcs_writel(GUEST_RIP, vcpu->arch.regs[VCPU_REGS_RIP]);
6592
6593 /* When single-stepping over STI and MOV SS, we must clear the
6594 * corresponding interruptibility bits in the guest state. Otherwise
6595 * vmentry fails as it then expects bit 14 (BS) in pending debug
6596 * exceptions being set, but that's not correct for the guest debugging
6597 * case. */
6598 if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP)
6599 vmx_set_interrupt_shadow(vcpu, 0);
6600
d7cd9796 6601 atomic_switch_perf_msrs(vmx);
2a7921b7 6602 debugctlmsr = get_debugctlmsr();
d7cd9796 6603
d462b819 6604 vmx->__launched = vmx->loaded_vmcs->launched;
104f226b 6605 asm(
6aa8b732 6606 /* Store host registers */
b188c81f
AK		 6607 "push %%" _ASM_DX "; push %%" _ASM_BP ";"
6608 "push %%" _ASM_CX " \n\t" /* placeholder for guest rcx */
6609 "push %%" _ASM_CX " \n\t"
6610 "cmp %%" _ASM_SP ", %c[host_rsp](%0) \n\t"
313dbd49 6611 "je 1f \n\t"
b188c81f 6612 "mov %%" _ASM_SP ", %c[host_rsp](%0) \n\t"
4ecac3fd 6613 __ex(ASM_VMX_VMWRITE_RSP_RDX) "\n\t"
313dbd49 6614 "1: \n\t"
d3edefc0 6615 /* Reload cr2 if changed */
b188c81f
AK		 6616 "mov %c[cr2](%0), %%" _ASM_AX " \n\t"
6617 "mov %%cr2, %%" _ASM_DX " \n\t"
6618 "cmp %%" _ASM_AX ", %%" _ASM_DX " \n\t"
d3edefc0 6619 "je 2f \n\t"
b188c81f 6620 "mov %%" _ASM_AX", %%cr2 \n\t"
d3edefc0 6621 "2: \n\t"
6aa8b732 6622 /* Check if vmlaunch of vmresume is needed */
e08aa78a 6623 "cmpl $0, %c[launched](%0) \n\t"
6aa8b732 6624 /* Load guest registers. Don't clobber flags. */
b188c81f
AK		 6625 "mov %c[rax](%0), %%" _ASM_AX " \n\t"
6626 "mov %c[rbx](%0), %%" _ASM_BX " \n\t"
6627 "mov %c[rdx](%0), %%" _ASM_DX " \n\t"
6628 "mov %c[rsi](%0), %%" _ASM_SI " \n\t"
6629 "mov %c[rdi](%0), %%" _ASM_DI " \n\t"
6630 "mov %c[rbp](%0), %%" _ASM_BP " \n\t"
05b3e0c2 6631#ifdef CONFIG_X86_64
e08aa78a
AK		 6632 "mov %c[r8](%0), %%r8 \n\t"
6633 "mov %c[r9](%0), %%r9 \n\t"
6634 "mov %c[r10](%0), %%r10 \n\t"
6635 "mov %c[r11](%0), %%r11 \n\t"
6636 "mov %c[r12](%0), %%r12 \n\t"
6637 "mov %c[r13](%0), %%r13 \n\t"
6638 "mov %c[r14](%0), %%r14 \n\t"
6639 "mov %c[r15](%0), %%r15 \n\t"
6aa8b732 6640#endif
b188c81f 6641 "mov %c[rcx](%0), %%" _ASM_CX " \n\t" /* kills %0 (ecx) */
c801949d 6642
6aa8b732 6643 /* Enter guest mode */
83287ea4 6644 "jne 1f \n\t"
4ecac3fd 6645 __ex(ASM_VMX_VMLAUNCH) "\n\t"
83287ea4
AK		 6646 "jmp 2f \n\t"
6647 "1: " __ex(ASM_VMX_VMRESUME) "\n\t"
6648 "2: "
6aa8b732 6649 /* Save guest registers, load host registers, keep flags */
b188c81f 6650 "mov %0, %c[wordsize](%%" _ASM_SP ") \n\t"
40712fae 6651 "pop %0 \n\t"
b188c81f
AK		 6652 "mov %%" _ASM_AX ", %c[rax](%0) \n\t"
6653 "mov %%" _ASM_BX ", %c[rbx](%0) \n\t"
6654 __ASM_SIZE(pop) " %c[rcx](%0) \n\t"
6655 "mov %%" _ASM_DX ", %c[rdx](%0) \n\t"
6656 "mov %%" _ASM_SI ", %c[rsi](%0) \n\t"
6657 "mov %%" _ASM_DI ", %c[rdi](%0) \n\t"
6658 "mov %%" _ASM_BP ", %c[rbp](%0) \n\t"
05b3e0c2 6659#ifdef CONFIG_X86_64
e08aa78a
AK		 6660 "mov %%r8, %c[r8](%0) \n\t"
6661 "mov %%r9, %c[r9](%0) \n\t"
6662 "mov %%r10, %c[r10](%0) \n\t"
6663 "mov %%r11, %c[r11](%0) \n\t"
6664 "mov %%r12, %c[r12](%0) \n\t"
6665 "mov %%r13, %c[r13](%0) \n\t"
6666 "mov %%r14, %c[r14](%0) \n\t"
6667 "mov %%r15, %c[r15](%0) \n\t"
6aa8b732 6668#endif
b188c81f
AK		 6669 "mov %%cr2, %%" _ASM_AX " \n\t"
6670 "mov %%" _ASM_AX ", %c[cr2](%0) \n\t"
c801949d 6671
b188c81f 6672 "pop %%" _ASM_BP "; pop %%" _ASM_DX " \n\t"
e08aa78a 6673 "setbe %c[fail](%0) \n\t"
83287ea4
AK		 6674 ".pushsection .rodata \n\t"
6675 ".global vmx_return \n\t"
6676 "vmx_return: " _ASM_PTR " 2b \n\t"
6677 ".popsection"
e08aa78a 6678 : : "c"(vmx), "d"((unsigned long)HOST_RSP),
d462b819 6679 [launched]"i"(offsetof(struct vcpu_vmx, __launched)),
e08aa78a 6680 [fail]"i"(offsetof(struct vcpu_vmx, fail)),
313dbd49 6681 [host_rsp]"i"(offsetof(struct vcpu_vmx, host_rsp)),
ad312c7c
ZX		 6682 [rax]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RAX])),
6683 [rbx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBX])),
6684 [rcx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RCX])),
6685 [rdx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDX])),
6686 [rsi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RSI])),
6687 [rdi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDI])),
6688 [rbp]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBP])),
05b3e0c2 6689#ifdef CONFIG_X86_64
ad312c7c
ZX		 6690 [r8]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R8])),
6691 [r9]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R9])),
6692 [r10]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R10])),
6693 [r11]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R11])),
6694 [r12]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R12])),
6695 [r13]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R13])),
6696 [r14]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R14])),
6697 [r15]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R15])),
6aa8b732 6698#endif
40712fae
AK		 6699 [cr2]"i"(offsetof(struct vcpu_vmx, vcpu.arch.cr2)),
6700 [wordsize]"i"(sizeof(ulong))
c2036300
LV		 6701 : "cc", "memory"
6702#ifdef CONFIG_X86_64
b188c81f 6703 , "rax", "rbx", "rdi", "rsi"
c2036300 6704 , "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"
b188c81f
AK		 6705#else
6706 , "eax", "ebx", "edi", "esi"
c2036300
LV		 6707#endif
6708 );
6aa8b732 6709
2a7921b7
GN		 6710 /* MSR_IA32_DEBUGCTLMSR is zeroed on vmexit. Restore it if needed */
6711 if (debugctlmsr)
6712 update_debugctlmsr(debugctlmsr);
6713
aa67f609
AK		 6714#ifndef CONFIG_X86_64
6715 /*
6716 * The sysexit path does not restore ds/es, so we must set them to
6717 * a reasonable value ourselves.
6718 *
6719 * We can't defer this to vmx_load_host_state() since that function
6720 * may be executed in interrupt context, which saves and restore segments
6721 * around it, nullifying its effect.
6722 */
6723 loadsegment(ds, __USER_DS);
6724 loadsegment(es, __USER_DS);
6725#endif
6726
6de4f3ad 6727 vcpu->arch.regs_avail = ~((1 << VCPU_REGS_RIP) | (1 << VCPU_REGS_RSP)
6de12732 6728 | (1 << VCPU_EXREG_RFLAGS)
69c73028 6729 | (1 << VCPU_EXREG_CPL)
aff48baa 6730 | (1 << VCPU_EXREG_PDPTR)
2fb92db1 6731 | (1 << VCPU_EXREG_SEGMENTS)
aff48baa 6732 | (1 << VCPU_EXREG_CR3));
5fdbf976
MT		 6733 vcpu->arch.regs_dirty = 0;
6734
1155f76a
AK		 6735 vmx->idt_vectoring_info = vmcs_read32(IDT_VECTORING_INFO_FIELD);
6736
66c78ae4
NHE		 6737 if (is_guest_mode(vcpu)) {
6738 struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
6739 vmcs12->idt_vectoring_info_field = vmx->idt_vectoring_info;
6740 if (vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK) {
6741 vmcs12->idt_vectoring_error_code =
6742 vmcs_read32(IDT_VECTORING_ERROR_CODE);
6743 vmcs12->vm_exit_instruction_len =
6744 vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
6745 }
6746 }
6747
d462b819 6748 vmx->loaded_vmcs->launched = 1;
1b6269db 6749
51aa01d1 6750 vmx->exit_reason = vmcs_read32(VM_EXIT_REASON);
1e2b1dd7 6751 trace_kvm_exit(vmx->exit_reason, vcpu, KVM_ISA_VMX);
51aa01d1
AK		 6752
6753 vmx_complete_atomic_exit(vmx);
6754 vmx_recover_nmi_blocking(vmx);
cf393f75 6755 vmx_complete_interrupts(vmx);
6aa8b732
AK		 6756}
6757
6aa8b732
AK		 6758static void vmx_free_vcpu(struct kvm_vcpu *vcpu)
6759{
fb3f0f51
RR		 6760 struct vcpu_vmx *vmx = to_vmx(vcpu);
6761
cdbecfc3 6762 free_vpid(vmx);
ec378aee 6763 free_nested(vmx);
d462b819 6764 free_loaded_vmcs(vmx->loaded_vmcs);
fb3f0f51
RR		 6765 kfree(vmx->guest_msrs);
6766 kvm_vcpu_uninit(vcpu);
a4770347 6767 kmem_cache_free(kvm_vcpu_cache, vmx);
6aa8b732
AK		 6768}
6769
fb3f0f51 6770static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id)
6aa8b732 6771{
fb3f0f51 6772 int err;
c16f862d 6773 struct vcpu_vmx *vmx = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
15ad7146 6774 int cpu;
6aa8b732 6775
a2fa3e9f 6776 if (!vmx)
fb3f0f51
RR		 6777 return ERR_PTR(-ENOMEM);
6778
2384d2b3
SY		 6779 allocate_vpid(vmx);
6780
fb3f0f51
RR		 6781 err = kvm_vcpu_init(&vmx->vcpu, kvm, id);
6782 if (err)
6783 goto free_vcpu;
965b58a5 6784
a2fa3e9f 6785 vmx->guest_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL);
be6d05cf 6786 err = -ENOMEM;
fb3f0f51 6787 if (!vmx->guest_msrs) {
fb3f0f51
RR		 6788 goto uninit_vcpu;
6789 }
965b58a5 6790
d462b819
NHE		 6791 vmx->loaded_vmcs = &vmx->vmcs01;
6792 vmx->loaded_vmcs->vmcs = alloc_vmcs();
6793 if (!vmx->loaded_vmcs->vmcs)
fb3f0f51 6794 goto free_msrs;
d462b819
NHE		 6795 if (!vmm_exclusive)
6796 kvm_cpu_vmxon(__pa(per_cpu(vmxarea, raw_smp_processor_id())));
6797 loaded_vmcs_init(vmx->loaded_vmcs);
6798 if (!vmm_exclusive)
6799 kvm_cpu_vmxoff();
a2fa3e9f 6800
15ad7146
AK		 6801 cpu = get_cpu();
6802 vmx_vcpu_load(&vmx->vcpu, cpu);
e48672fa 6803 vmx->vcpu.cpu = cpu;
8b9cf98c 6804 err = vmx_vcpu_setup(vmx);
fb3f0f51 6805 vmx_vcpu_put(&vmx->vcpu);
15ad7146 6806 put_cpu();
fb3f0f51
RR		 6807 if (err)
6808 goto free_vmcs;
5e4a0b3c 6809 if (vm_need_virtualize_apic_accesses(kvm))
be6d05cf
JK		 6810 err = alloc_apic_access_page(kvm);
6811 if (err)
5e4a0b3c 6812 goto free_vmcs;
fb3f0f51 6813
b927a3ce
SY		 6814 if (enable_ept) {
6815 if (!kvm->arch.ept_identity_map_addr)
6816 kvm->arch.ept_identity_map_addr =
6817 VMX_EPT_IDENTITY_PAGETABLE_ADDR;
93ea5388 6818 err = -ENOMEM;
b7ebfb05
SY		 6819 if (alloc_identity_pagetable(kvm) != 0)
6820 goto free_vmcs;
93ea5388
GN		 6821 if (!init_rmode_identity_map(kvm))
6822 goto free_vmcs;
b927a3ce 6823 }
b7ebfb05 6824
a9d30f33
NHE		 6825 vmx->nested.current_vmptr = -1ull;
6826 vmx->nested.current_vmcs12 = NULL;
6827
fb3f0f51
RR		 6828 return &vmx->vcpu;
6829
6830free_vmcs:
5f3fbc34 6831 free_loaded_vmcs(vmx->loaded_vmcs);
fb3f0f51 6832free_msrs:
fb3f0f51
RR		 6833 kfree(vmx->guest_msrs);
6834uninit_vcpu:
6835 kvm_vcpu_uninit(&vmx->vcpu);
6836free_vcpu:
cdbecfc3 6837 free_vpid(vmx);
a4770347 6838 kmem_cache_free(kvm_vcpu_cache, vmx);
fb3f0f51 6839 return ERR_PTR(err);
6aa8b732
AK		 6840}
6841
002c7f7c
YS		 6842static void __init vmx_check_processor_compat(void *rtn)
6843{
6844 struct vmcs_config vmcs_conf;
6845
6846 *(int *)rtn = 0;
6847 if (setup_vmcs_config(&vmcs_conf) < 0)
6848 *(int *)rtn = -EIO;
6849 if (memcmp(&vmcs_config, &vmcs_conf, sizeof(struct vmcs_config)) != 0) {
6850 printk(KERN_ERR "kvm: CPU %d feature inconsistency!\n",
6851 smp_processor_id());
6852 *(int *)rtn = -EIO;
6853 }
6854}
6855
67253af5
SY		 6856static int get_ept_level(void)
6857{
6858 return VMX_EPT_DEFAULT_GAW + 1;
6859}
6860
4b12f0de 6861static u64 vmx_get_mt_mask(struct kvm_vcpu *vcpu, gfn_t gfn, bool is_mmio)
64d4d521 6862{
4b12f0de
SY		 6863 u64 ret;
6864
522c68c4
SY		 6865 /* For VT-d and EPT combination
6866 * 1. MMIO: always map as UC
6867 * 2. EPT with VT-d:
6868 * a. VT-d without snooping control feature: can't guarantee the
6869 * result, try to trust guest.
6870 * b. VT-d with snooping control feature: snooping control feature of
6871 * VT-d engine can guarantee the cache correctness. Just set it
6872 * to WB to keep consistent with host. So the same as item 3.
a19a6d11 6873 * 3. EPT without VT-d: always map as WB and set IPAT=1 to keep
522c68c4
SY		 6874 * consistent with host MTRR
6875 */
4b12f0de
SY		 6876 if (is_mmio)
6877 ret = MTRR_TYPE_UNCACHABLE << VMX_EPT_MT_EPTE_SHIFT;
522c68c4
SY		 6878 else if (vcpu->kvm->arch.iommu_domain &&
6879 !(vcpu->kvm->arch.iommu_flags & KVM_IOMMU_CACHE_COHERENCY))
6880 ret = kvm_get_guest_memory_type(vcpu, gfn) <<
6881 VMX_EPT_MT_EPTE_SHIFT;
4b12f0de 6882 else
522c68c4 6883 ret = (MTRR_TYPE_WRBACK << VMX_EPT_MT_EPTE_SHIFT)
a19a6d11 6884 | VMX_EPT_IPAT_BIT;
4b12f0de
SY		 6885
6886 return ret;
64d4d521
SY		 6887}
6888
17cc3935 6889static int vmx_get_lpage_level(void)
344f414f 6890{
878403b7
SY		 6891 if (enable_ept && !cpu_has_vmx_ept_1g_page())
6892 return PT_DIRECTORY_LEVEL;
6893 else
6894 /* For shadow and EPT supported 1GB page */
6895 return PT_PDPE_LEVEL;
344f414f
JR		 6896}
6897
0e851880
SY		 6898static void vmx_cpuid_update(struct kvm_vcpu *vcpu)
6899{
4e47c7a6
SY		 6900 struct kvm_cpuid_entry2 *best;
6901 struct vcpu_vmx *vmx = to_vmx(vcpu);
6902 u32 exec_control;
6903
6904 vmx->rdtscp_enabled = false;
6905 if (vmx_rdtscp_supported()) {
6906 exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL);
6907 if (exec_control & SECONDARY_EXEC_RDTSCP) {
6908 best = kvm_find_cpuid_entry(vcpu, 0x80000001, 0);
6909 if (best && (best->edx & bit(X86_FEATURE_RDTSCP)))
6910 vmx->rdtscp_enabled = true;
6911 else {
6912 exec_control &= ~SECONDARY_EXEC_RDTSCP;
6913 vmcs_write32(SECONDARY_VM_EXEC_CONTROL,
6914 exec_control);
6915 }
6916 }
6917 }
ad756a16 6918
ad756a16
MJ		 6919 /* Exposing INVPCID only when PCID is exposed */
6920 best = kvm_find_cpuid_entry(vcpu, 0x7, 0);
6921 if (vmx_invpcid_supported() &&
4f977045 6922 best && (best->ebx & bit(X86_FEATURE_INVPCID)) &&
ad756a16 6923 guest_cpuid_has_pcid(vcpu)) {
29282fde 6924 exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL);
ad756a16
MJ		 6925 exec_control |= SECONDARY_EXEC_ENABLE_INVPCID;
6926 vmcs_write32(SECONDARY_VM_EXEC_CONTROL,
6927 exec_control);
6928 } else {
29282fde
TI		 6929 if (cpu_has_secondary_exec_ctrls()) {
6930 exec_control = vmcs_read32(SECONDARY_VM_EXEC_CONTROL);
6931 exec_control &= ~SECONDARY_EXEC_ENABLE_INVPCID;
6932 vmcs_write32(SECONDARY_VM_EXEC_CONTROL,
6933 exec_control);
6934 }
ad756a16 6935 if (best)
4f977045 6936 best->ebx &= ~bit(X86_FEATURE_INVPCID);
ad756a16 6937 }
0e851880
SY		 6938}
6939
d4330ef2
JR		 6940static void vmx_set_supported_cpuid(u32 func, struct kvm_cpuid_entry2 *entry)
6941{
7b8050f5
NHE		 6942 if (func == 1 && nested)
6943 entry->ecx |= bit(X86_FEATURE_VMX);
d4330ef2
JR		 6944}
6945
fe3ef05c
NHE		 6946/*
6947 * prepare_vmcs02 is called when the L1 guest hypervisor runs its nested
6948 * L2 guest. L1 has a vmcs for L2 (vmcs12), and this function "merges" it
6949 * with L0's requirements for its guest (a.k.a. vmsc01), so we can run the L2
6950 * guest in a way that will both be appropriate to L1's requests, and our
6951 * needs. In addition to modifying the active vmcs (which is vmcs02), this
6952 * function also has additional necessary side-effects, like setting various
6953 * vcpu->arch fields.
6954 */
6955static void prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12)
6956{
6957 struct vcpu_vmx *vmx = to_vmx(vcpu);
6958 u32 exec_control;
6959
6960 vmcs_write16(GUEST_ES_SELECTOR, vmcs12->guest_es_selector);
6961 vmcs_write16(GUEST_CS_SELECTOR, vmcs12->guest_cs_selector);
6962 vmcs_write16(GUEST_SS_SELECTOR, vmcs12->guest_ss_selector);
6963 vmcs_write16(GUEST_DS_SELECTOR, vmcs12->guest_ds_selector);
6964 vmcs_write16(GUEST_FS_SELECTOR, vmcs12->guest_fs_selector);
6965 vmcs_write16(GUEST_GS_SELECTOR, vmcs12->guest_gs_selector);
6966 vmcs_write16(GUEST_LDTR_SELECTOR, vmcs12->guest_ldtr_selector);
6967 vmcs_write16(GUEST_TR_SELECTOR, vmcs12->guest_tr_selector);
6968 vmcs_write32(GUEST_ES_LIMIT, vmcs12->guest_es_limit);
6969 vmcs_write32(GUEST_CS_LIMIT, vmcs12->guest_cs_limit);
6970 vmcs_write32(GUEST_SS_LIMIT, vmcs12->guest_ss_limit);
6971 vmcs_write32(GUEST_DS_LIMIT, vmcs12->guest_ds_limit);
6972 vmcs_write32(GUEST_FS_LIMIT, vmcs12->guest_fs_limit);
6973 vmcs_write32(GUEST_GS_LIMIT, vmcs12->guest_gs_limit);
6974 vmcs_write32(GUEST_LDTR_LIMIT, vmcs12->guest_ldtr_limit);
6975 vmcs_write32(GUEST_TR_LIMIT, vmcs12->guest_tr_limit);
6976 vmcs_write32(GUEST_GDTR_LIMIT, vmcs12->guest_gdtr_limit);
6977 vmcs_write32(GUEST_IDTR_LIMIT, vmcs12->guest_idtr_limit);
6978 vmcs_write32(GUEST_ES_AR_BYTES, vmcs12->guest_es_ar_bytes);
6979 vmcs_write32(GUEST_CS_AR_BYTES, vmcs12->guest_cs_ar_bytes);
6980 vmcs_write32(GUEST_SS_AR_BYTES, vmcs12->guest_ss_ar_bytes);
6981 vmcs_write32(GUEST_DS_AR_BYTES, vmcs12->guest_ds_ar_bytes);
6982 vmcs_write32(GUEST_FS_AR_BYTES, vmcs12->guest_fs_ar_bytes);
6983 vmcs_write32(GUEST_GS_AR_BYTES, vmcs12->guest_gs_ar_bytes);
6984 vmcs_write32(GUEST_LDTR_AR_BYTES, vmcs12->guest_ldtr_ar_bytes);
6985 vmcs_write32(GUEST_TR_AR_BYTES, vmcs12->guest_tr_ar_bytes);
6986 vmcs_writel(GUEST_ES_BASE, vmcs12->guest_es_base);
6987 vmcs_writel(GUEST_CS_BASE, vmcs12->guest_cs_base);
6988 vmcs_writel(GUEST_SS_BASE, vmcs12->guest_ss_base);
6989 vmcs_writel(GUEST_DS_BASE, vmcs12->guest_ds_base);
6990 vmcs_writel(GUEST_FS_BASE, vmcs12->guest_fs_base);
6991 vmcs_writel(GUEST_GS_BASE, vmcs12->guest_gs_base);
6992 vmcs_writel(GUEST_LDTR_BASE, vmcs12->guest_ldtr_base);
6993 vmcs_writel(GUEST_TR_BASE, vmcs12->guest_tr_base);
6994 vmcs_writel(GUEST_GDTR_BASE, vmcs12->guest_gdtr_base);
6995 vmcs_writel(GUEST_IDTR_BASE, vmcs12->guest_idtr_base);
6996
6997 vmcs_write64(GUEST_IA32_DEBUGCTL, vmcs12->guest_ia32_debugctl);
6998 vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
6999 vmcs12->vm_entry_intr_info_field);
7000 vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE,
7001 vmcs12->vm_entry_exception_error_code);
7002 vmcs_write32(VM_ENTRY_INSTRUCTION_LEN,
7003 vmcs12->vm_entry_instruction_len);
7004 vmcs_write32(GUEST_INTERRUPTIBILITY_INFO,
7005 vmcs12->guest_interruptibility_info);
7006 vmcs_write32(GUEST_ACTIVITY_STATE, vmcs12->guest_activity_state);
7007 vmcs_write32(GUEST_SYSENTER_CS, vmcs12->guest_sysenter_cs);
503cd0c5 7008 kvm_set_dr(vcpu, 7, vmcs12->guest_dr7);
fe3ef05c
NHE		 7009 vmcs_writel(GUEST_RFLAGS, vmcs12->guest_rflags);
7010 vmcs_writel(GUEST_PENDING_DBG_EXCEPTIONS,
7011 vmcs12->guest_pending_dbg_exceptions);
7012 vmcs_writel(GUEST_SYSENTER_ESP, vmcs12->guest_sysenter_esp);
7013 vmcs_writel(GUEST_SYSENTER_EIP, vmcs12->guest_sysenter_eip);
7014
7015 vmcs_write64(VMCS_LINK_POINTER, -1ull);
7016
7017 vmcs_write32(PIN_BASED_VM_EXEC_CONTROL,
7018 (vmcs_config.pin_based_exec_ctrl |
7019 vmcs12->pin_based_vm_exec_control));
7020
0238ea91
JK		 7021 if (vmcs12->pin_based_vm_exec_control & PIN_BASED_VMX_PREEMPTION_TIMER)
7022 vmcs_write32(VMX_PREEMPTION_TIMER_VALUE,
7023 vmcs12->vmx_preemption_timer_value);
7024
fe3ef05c
NHE		 7025 /*
7026 * Whether page-faults are trapped is determined by a combination of
7027 * 3 settings: PFEC_MASK, PFEC_MATCH and EXCEPTION_BITMAP.PF.
7028 * If enable_ept, L0 doesn't care about page faults and we should
7029 * set all of these to L1's desires. However, if !enable_ept, L0 does
7030 * care about (at least some) page faults, and because it is not easy
7031 * (if at all possible?) to merge L0 and L1's desires, we simply ask
7032 * to exit on each and every L2 page fault. This is done by setting
7033 * MASK=MATCH=0 and (see below) EB.PF=1.
7034 * Note that below we don't need special code to set EB.PF beyond the
7035 * "or"ing of the EB of vmcs01 and vmcs12, because when enable_ept,
7036 * vmcs01's EB.PF is 0 so the "or" will take vmcs12's value, and when
7037 * !enable_ept, EB.PF is 1, so the "or" will always be 1.
7038 *
7039 * A problem with this approach (when !enable_ept) is that L1 may be
7040 * injected with more page faults than it asked for. This could have
7041 * caused problems, but in practice existing hypervisors don't care.
7042 * To fix this, we will need to emulate the PFEC checking (on the L1
7043 * page tables), using walk_addr(), when injecting PFs to L1.
7044 */
7045 vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK,
7046 enable_ept ? vmcs12->page_fault_error_code_mask : 0);
7047 vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH,
7048 enable_ept ? vmcs12->page_fault_error_code_match : 0);
7049
7050 if (cpu_has_secondary_exec_ctrls()) {
7051 u32 exec_control = vmx_secondary_exec_control(vmx);
7052 if (!vmx->rdtscp_enabled)
7053 exec_control &= ~SECONDARY_EXEC_RDTSCP;
7054 /* Take the following fields only from vmcs12 */
7055 exec_control &= ~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES;
7056 if (nested_cpu_has(vmcs12,
7057 CPU_BASED_ACTIVATE_SECONDARY_CONTROLS))
7058 exec_control |= vmcs12->secondary_vm_exec_control;
7059
7060 if (exec_control & SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES) {
7061 /*
7062 * Translate L1 physical address to host physical
7063 * address for vmcs02. Keep the page pinned, so this
7064 * physical address remains valid. We keep a reference
7065 * to it so we can release it later.
7066 */
7067 if (vmx->nested.apic_access_page) /* shouldn't happen */
7068 nested_release_page(vmx->nested.apic_access_page);
7069 vmx->nested.apic_access_page =
7070 nested_get_page(vcpu, vmcs12->apic_access_addr);
7071 /*
7072 * If translation failed, no matter: This feature asks
7073 * to exit when accessing the given address, and if it
7074 * can never be accessed, this feature won't do
7075 * anything anyway.
7076 */
7077 if (!vmx->nested.apic_access_page)
7078 exec_control &=
7079 ~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES;
7080 else
7081 vmcs_write64(APIC_ACCESS_ADDR,
7082 page_to_phys(vmx->nested.apic_access_page));
7083 }
7084
7085 vmcs_write32(SECONDARY_VM_EXEC_CONTROL, exec_control);
7086 }
7087
7088
7089 /*
7090 * Set host-state according to L0's settings (vmcs12 is irrelevant here)
7091 * Some constant fields are set here by vmx_set_constant_host_state().
7092 * Other fields are different per CPU, and will be set later when
7093 * vmx_vcpu_load() is called, and when vmx_save_host_state() is called.
7094 */
7095 vmx_set_constant_host_state();
7096
7097 /*
7098 * HOST_RSP is normally set correctly in vmx_vcpu_run() just before
7099 * entry, but only if the current (host) sp changed from the value
7100 * we wrote last (vmx->host_rsp). This cache is no longer relevant
7101 * if we switch vmcs, and rather than hold a separate cache per vmcs,
7102 * here we just force the write to happen on entry.
7103 */
7104 vmx->host_rsp = 0;
7105
7106 exec_control = vmx_exec_control(vmx); /* L0's desires */
7107 exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING;
7108 exec_control &= ~CPU_BASED_VIRTUAL_NMI_PENDING;
7109 exec_control &= ~CPU_BASED_TPR_SHADOW;
7110 exec_control |= vmcs12->cpu_based_vm_exec_control;
7111 /*
7112 * Merging of IO and MSR bitmaps not currently supported.
7113 * Rather, exit every time.
7114 */
7115 exec_control &= ~CPU_BASED_USE_MSR_BITMAPS;
7116 exec_control &= ~CPU_BASED_USE_IO_BITMAPS;
7117 exec_control |= CPU_BASED_UNCOND_IO_EXITING;
7118
7119 vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, exec_control);
7120
7121 /* EXCEPTION_BITMAP and CR0_GUEST_HOST_MASK should basically be the
7122 * bitwise-or of what L1 wants to trap for L2, and what we want to
7123 * trap. Note that CR0.TS also needs updating - we do this later.
7124 */
7125 update_exception_bitmap(vcpu);
7126 vcpu->arch.cr0_guest_owned_bits &= ~vmcs12->cr0_guest_host_mask;
7127 vmcs_writel(CR0_GUEST_HOST_MASK, ~vcpu->arch.cr0_guest_owned_bits);
7128
7129 /* Note: IA32_MODE, LOAD_IA32_EFER are modified by vmx_set_efer below */
7130 vmcs_write32(VM_EXIT_CONTROLS,
7131 vmcs12->vm_exit_controls | vmcs_config.vmexit_ctrl);
7132 vmcs_write32(VM_ENTRY_CONTROLS, vmcs12->vm_entry_controls |
7133 (vmcs_config.vmentry_ctrl & ~VM_ENTRY_IA32E_MODE));
7134
7135 if (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_IA32_PAT)
7136 vmcs_write64(GUEST_IA32_PAT, vmcs12->guest_ia32_pat);
7137 else if (vmcs_config.vmentry_ctrl & VM_ENTRY_LOAD_IA32_PAT)
7138 vmcs_write64(GUEST_IA32_PAT, vmx->vcpu.arch.pat);
7139
7140
7141 set_cr4_guest_host_mask(vmx);
7142
27fc51b2
NHE		 7143 if (vmcs12->cpu_based_vm_exec_control & CPU_BASED_USE_TSC_OFFSETING)
7144 vmcs_write64(TSC_OFFSET,
7145 vmx->nested.vmcs01_tsc_offset + vmcs12->tsc_offset);
7146 else
7147 vmcs_write64(TSC_OFFSET, vmx->nested.vmcs01_tsc_offset);
fe3ef05c
NHE		 7148
7149 if (enable_vpid) {
7150 /*
7151 * Trivially support vpid by letting L2s share their parent
7152 * L1's vpid. TODO: move to a more elaborate solution, giving
7153 * each L2 its own vpid and exposing the vpid feature to L1.
7154 */
7155 vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->vpid);
7156 vmx_flush_tlb(vcpu);
7157 }
7158
7159 if (vmcs12->vm_entry_controls & VM_ENTRY_LOAD_IA32_EFER)
7160 vcpu->arch.efer = vmcs12->guest_ia32_efer;
7161 if (vmcs12->vm_entry_controls & VM_ENTRY_IA32E_MODE)
7162 vcpu->arch.efer |= (EFER_LMA | EFER_LME);
7163 else
7164 vcpu->arch.efer &= ~(EFER_LMA | EFER_LME);
7165 /* Note: modifies VM_ENTRY/EXIT_CONTROLS and GUEST/HOST_IA32_EFER */
7166 vmx_set_efer(vcpu, vcpu->arch.efer);
7167
7168 /*
7169 * This sets GUEST_CR0 to vmcs12->guest_cr0, with possibly a modified
7170 * TS bit (for lazy fpu) and bits which we consider mandatory enabled.
7171 * The CR0_READ_SHADOW is what L2 should have expected to read given
7172 * the specifications by L1; It's not enough to take
7173 * vmcs12->cr0_read_shadow because on our cr0_guest_host_mask we we
7174 * have more bits than L1 expected.
7175 */
7176 vmx_set_cr0(vcpu, vmcs12->guest_cr0);
7177 vmcs_writel(CR0_READ_SHADOW, nested_read_cr0(vmcs12));
7178
7179 vmx_set_cr4(vcpu, vmcs12->guest_cr4);
7180 vmcs_writel(CR4_READ_SHADOW, nested_read_cr4(vmcs12));
7181
7182 /* shadow page tables on either EPT or shadow page tables */
7183 kvm_set_cr3(vcpu, vmcs12->guest_cr3);
7184 kvm_mmu_reset_context(vcpu);
7185
7186 kvm_register_write(vcpu, VCPU_REGS_RSP, vmcs12->guest_rsp);
7187 kvm_register_write(vcpu, VCPU_REGS_RIP, vmcs12->guest_rip);
7188}
7189
cd232ad0
NHE		 7190/*
7191 * nested_vmx_run() handles a nested entry, i.e., a VMLAUNCH or VMRESUME on L1
7192 * for running an L2 nested guest.
7193 */
7194static int nested_vmx_run(struct kvm_vcpu *vcpu, bool launch)
7195{
7196 struct vmcs12 *vmcs12;
7197 struct vcpu_vmx *vmx = to_vmx(vcpu);
7198 int cpu;
7199 struct loaded_vmcs *vmcs02;
7200
7201 if (!nested_vmx_check_permission(vcpu) ||
7202 !nested_vmx_check_vmcs12(vcpu))
7203 return 1;
7204
7205 skip_emulated_instruction(vcpu);
7206 vmcs12 = get_vmcs12(vcpu);
7207
7c177938
NHE		 7208 /*
7209 * The nested entry process starts with enforcing various prerequisites
7210 * on vmcs12 as required by the Intel SDM, and act appropriately when
7211 * they fail: As the SDM explains, some conditions should cause the
7212 * instruction to fail, while others will cause the instruction to seem
7213 * to succeed, but return an EXIT_REASON_INVALID_STATE.
7214 * To speed up the normal (success) code path, we should avoid checking
7215 * for misconfigurations which will anyway be caught by the processor
7216 * when using the merged vmcs02.
7217 */
7218 if (vmcs12->launch_state == launch) {
7219 nested_vmx_failValid(vcpu,
7220 launch ? VMXERR_VMLAUNCH_NONCLEAR_VMCS
7221 : VMXERR_VMRESUME_NONLAUNCHED_VMCS);
7222 return 1;
7223 }
7224
7225 if ((vmcs12->cpu_based_vm_exec_control & CPU_BASED_USE_MSR_BITMAPS) &&
7226 !IS_ALIGNED(vmcs12->msr_bitmap, PAGE_SIZE)) {
7227 /*TODO: Also verify bits beyond physical address width are 0*/
7228 nested_vmx_failValid(vcpu, VMXERR_ENTRY_INVALID_CONTROL_FIELD);
7229 return 1;
7230 }
7231
7232 if (nested_cpu_has2(vmcs12, SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES) &&
7233 !IS_ALIGNED(vmcs12->apic_access_addr, PAGE_SIZE)) {
7234 /*TODO: Also verify bits beyond physical address width are 0*/
7235 nested_vmx_failValid(vcpu, VMXERR_ENTRY_INVALID_CONTROL_FIELD);
7236 return 1;
7237 }
7238
7239 if (vmcs12->vm_entry_msr_load_count > 0 ||
7240 vmcs12->vm_exit_msr_load_count > 0 ||
7241 vmcs12->vm_exit_msr_store_count > 0) {
bd80158a
JK		 7242 pr_warn_ratelimited("%s: VMCS MSR_{LOAD,STORE} unsupported\n",
7243 __func__);
7c177938
NHE		 7244 nested_vmx_failValid(vcpu, VMXERR_ENTRY_INVALID_CONTROL_FIELD);
7245 return 1;
7246 }
7247
7248 if (!vmx_control_verify(vmcs12->cpu_based_vm_exec_control,
7249 nested_vmx_procbased_ctls_low, nested_vmx_procbased_ctls_high) ||
7250 !vmx_control_verify(vmcs12->secondary_vm_exec_control,
7251 nested_vmx_secondary_ctls_low, nested_vmx_secondary_ctls_high) ||
7252 !vmx_control_verify(vmcs12->pin_based_vm_exec_control,
7253 nested_vmx_pinbased_ctls_low, nested_vmx_pinbased_ctls_high) ||
7254 !vmx_control_verify(vmcs12->vm_exit_controls,
7255 nested_vmx_exit_ctls_low, nested_vmx_exit_ctls_high) ||
7256 !vmx_control_verify(vmcs12->vm_entry_controls,
7257 nested_vmx_entry_ctls_low, nested_vmx_entry_ctls_high))
7258 {
7259 nested_vmx_failValid(vcpu, VMXERR_ENTRY_INVALID_CONTROL_FIELD);
7260 return 1;
7261 }
7262
7263 if (((vmcs12->host_cr0 & VMXON_CR0_ALWAYSON) != VMXON_CR0_ALWAYSON) ||
7264 ((vmcs12->host_cr4 & VMXON_CR4_ALWAYSON) != VMXON_CR4_ALWAYSON)) {
7265 nested_vmx_failValid(vcpu,
7266 VMXERR_ENTRY_INVALID_HOST_STATE_FIELD);
7267 return 1;
7268 }
7269
7270 if (((vmcs12->guest_cr0 & VMXON_CR0_ALWAYSON) != VMXON_CR0_ALWAYSON) ||
7271 ((vmcs12->guest_cr4 & VMXON_CR4_ALWAYSON) != VMXON_CR4_ALWAYSON)) {
7272 nested_vmx_entry_failure(vcpu, vmcs12,
7273 EXIT_REASON_INVALID_STATE, ENTRY_FAIL_DEFAULT);
7274 return 1;
7275 }
7276 if (vmcs12->vmcs_link_pointer != -1ull) {
7277 nested_vmx_entry_failure(vcpu, vmcs12,
7278 EXIT_REASON_INVALID_STATE, ENTRY_FAIL_VMCS_LINK_PTR);
7279 return 1;
7280 }
7281
7282 /*
7283 * We're finally done with prerequisite checking, and can start with
7284 * the nested entry.
7285 */
7286
cd232ad0
NHE		 7287 vmcs02 = nested_get_current_vmcs02(vmx);
7288 if (!vmcs02)
7289 return -ENOMEM;
7290
7291 enter_guest_mode(vcpu);
7292
7293 vmx->nested.vmcs01_tsc_offset = vmcs_read64(TSC_OFFSET);
7294
7295 cpu = get_cpu();
7296 vmx->loaded_vmcs = vmcs02;
7297 vmx_vcpu_put(vcpu);
7298 vmx_vcpu_load(vcpu, cpu);
7299 vcpu->cpu = cpu;
7300 put_cpu();
7301
36c3cc42
JK		 7302 vmx_segment_cache_clear(vmx);
7303
cd232ad0
NHE		 7304 vmcs12->launch_state = 1;
7305
7306 prepare_vmcs02(vcpu, vmcs12);
7307
7308 /*
7309 * Note no nested_vmx_succeed or nested_vmx_fail here. At this point
7310 * we are no longer running L1, and VMLAUNCH/VMRESUME has not yet
7311 * returned as far as L1 is concerned. It will only return (and set
7312 * the success flag) when L2 exits (see nested_vmx_vmexit()).
7313 */
7314 return 1;
7315}
7316
4704d0be
NHE		 7317/*
7318 * On a nested exit from L2 to L1, vmcs12.guest_cr0 might not be up-to-date
7319 * because L2 may have changed some cr0 bits directly (CRO_GUEST_HOST_MASK).
7320 * This function returns the new value we should put in vmcs12.guest_cr0.
7321 * It's not enough to just return the vmcs02 GUEST_CR0. Rather,
7322 * 1. Bits that neither L0 nor L1 trapped, were set directly by L2 and are now
7323 * available in vmcs02 GUEST_CR0. (Note: It's enough to check that L0
7324 * didn't trap the bit, because if L1 did, so would L0).
7325 * 2. Bits that L1 asked to trap (and therefore L0 also did) could not have
7326 * been modified by L2, and L1 knows it. So just leave the old value of
7327 * the bit from vmcs12.guest_cr0. Note that the bit from vmcs02 GUEST_CR0
7328 * isn't relevant, because if L0 traps this bit it can set it to anything.
7329 * 3. Bits that L1 didn't trap, but L0 did. L1 believes the guest could have
7330 * changed these bits, and therefore they need to be updated, but L0
7331 * didn't necessarily allow them to be changed in GUEST_CR0 - and rather
7332 * put them in vmcs02 CR0_READ_SHADOW. So take these bits from there.
7333 */
7334static inline unsigned long
7335vmcs12_guest_cr0(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12)
7336{
7337 return
7338 /*1*/ (vmcs_readl(GUEST_CR0) & vcpu->arch.cr0_guest_owned_bits) |
7339 /*2*/ (vmcs12->guest_cr0 & vmcs12->cr0_guest_host_mask) |
7340 /*3*/ (vmcs_readl(CR0_READ_SHADOW) & ~(vmcs12->cr0_guest_host_mask |
7341 vcpu->arch.cr0_guest_owned_bits));
7342}
7343
7344static inline unsigned long
7345vmcs12_guest_cr4(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12)
7346{
7347 return
7348 /*1*/ (vmcs_readl(GUEST_CR4) & vcpu->arch.cr4_guest_owned_bits) |
7349 /*2*/ (vmcs12->guest_cr4 & vmcs12->cr4_guest_host_mask) |
7350 /*3*/ (vmcs_readl(CR4_READ_SHADOW) & ~(vmcs12->cr4_guest_host_mask |
7351 vcpu->arch.cr4_guest_owned_bits));
7352}
7353
7354/*
7355 * prepare_vmcs12 is part of what we need to do when the nested L2 guest exits
7356 * and we want to prepare to run its L1 parent. L1 keeps a vmcs for L2 (vmcs12),
7357 * and this function updates it to reflect the changes to the guest state while
7358 * L2 was running (and perhaps made some exits which were handled directly by L0
7359 * without going back to L1), and to reflect the exit reason.
7360 * Note that we do not have to copy here all VMCS fields, just those that
7361 * could have changed by the L2 guest or the exit - i.e., the guest-state and
7362 * exit-information fields only. Other fields are modified by L1 with VMWRITE,
7363 * which already writes to vmcs12 directly.
7364 */
733568f9 7365static void prepare_vmcs12(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12)
4704d0be
NHE		 7366{
7367 /* update guest state fields: */
7368 vmcs12->guest_cr0 = vmcs12_guest_cr0(vcpu, vmcs12);
7369 vmcs12->guest_cr4 = vmcs12_guest_cr4(vcpu, vmcs12);
7370
7371 kvm_get_dr(vcpu, 7, (unsigned long *)&vmcs12->guest_dr7);
7372 vmcs12->guest_rsp = kvm_register_read(vcpu, VCPU_REGS_RSP);
7373 vmcs12->guest_rip = kvm_register_read(vcpu, VCPU_REGS_RIP);
7374 vmcs12->guest_rflags = vmcs_readl(GUEST_RFLAGS);
7375
7376 vmcs12->guest_es_selector = vmcs_read16(GUEST_ES_SELECTOR);
7377 vmcs12->guest_cs_selector = vmcs_read16(GUEST_CS_SELECTOR);
7378 vmcs12->guest_ss_selector = vmcs_read16(GUEST_SS_SELECTOR);
7379 vmcs12->guest_ds_selector = vmcs_read16(GUEST_DS_SELECTOR);
7380 vmcs12->guest_fs_selector = vmcs_read16(GUEST_FS_SELECTOR);
7381 vmcs12->guest_gs_selector = vmcs_read16(GUEST_GS_SELECTOR);
7382 vmcs12->guest_ldtr_selector = vmcs_read16(GUEST_LDTR_SELECTOR);
7383 vmcs12->guest_tr_selector = vmcs_read16(GUEST_TR_SELECTOR);
7384 vmcs12->guest_es_limit = vmcs_read32(GUEST_ES_LIMIT);
7385 vmcs12->guest_cs_limit = vmcs_read32(GUEST_CS_LIMIT);
7386 vmcs12->guest_ss_limit = vmcs_read32(GUEST_SS_LIMIT);
7387 vmcs12->guest_ds_limit = vmcs_read32(GUEST_DS_LIMIT);
7388 vmcs12->guest_fs_limit = vmcs_read32(GUEST_FS_LIMIT);
7389 vmcs12->guest_gs_limit = vmcs_read32(GUEST_GS_LIMIT);
7390 vmcs12->guest_ldtr_limit = vmcs_read32(GUEST_LDTR_LIMIT);
7391 vmcs12->guest_tr_limit = vmcs_read32(GUEST_TR_LIMIT);
7392 vmcs12->guest_gdtr_limit = vmcs_read32(GUEST_GDTR_LIMIT);
7393 vmcs12->guest_idtr_limit = vmcs_read32(GUEST_IDTR_LIMIT);
7394 vmcs12->guest_es_ar_bytes = vmcs_read32(GUEST_ES_AR_BYTES);
7395 vmcs12->guest_cs_ar_bytes = vmcs_read32(GUEST_CS_AR_BYTES);
7396 vmcs12->guest_ss_ar_bytes = vmcs_read32(GUEST_SS_AR_BYTES);
7397 vmcs12->guest_ds_ar_bytes = vmcs_read32(GUEST_DS_AR_BYTES);
7398 vmcs12->guest_fs_ar_bytes = vmcs_read32(GUEST_FS_AR_BYTES);
7399 vmcs12->guest_gs_ar_bytes = vmcs_read32(GUEST_GS_AR_BYTES);
7400 vmcs12->guest_ldtr_ar_bytes = vmcs_read32(GUEST_LDTR_AR_BYTES);
7401 vmcs12->guest_tr_ar_bytes = vmcs_read32(GUEST_TR_AR_BYTES);
7402 vmcs12->guest_es_base = vmcs_readl(GUEST_ES_BASE);
7403 vmcs12->guest_cs_base = vmcs_readl(GUEST_CS_BASE);
7404 vmcs12->guest_ss_base = vmcs_readl(GUEST_SS_BASE);
7405 vmcs12->guest_ds_base = vmcs_readl(GUEST_DS_BASE);
7406 vmcs12->guest_fs_base = vmcs_readl(GUEST_FS_BASE);
7407 vmcs12->guest_gs_base = vmcs_readl(GUEST_GS_BASE);
7408 vmcs12->guest_ldtr_base = vmcs_readl(GUEST_LDTR_BASE);
7409 vmcs12->guest_tr_base = vmcs_readl(GUEST_TR_BASE);
7410 vmcs12->guest_gdtr_base = vmcs_readl(GUEST_GDTR_BASE);
7411 vmcs12->guest_idtr_base = vmcs_readl(GUEST_IDTR_BASE);
7412
7413 vmcs12->guest_activity_state = vmcs_read32(GUEST_ACTIVITY_STATE);
7414 vmcs12->guest_interruptibility_info =
7415 vmcs_read32(GUEST_INTERRUPTIBILITY_INFO);
7416 vmcs12->guest_pending_dbg_exceptions =
7417 vmcs_readl(GUEST_PENDING_DBG_EXCEPTIONS);
7418
c18911a2
JK		 7419 vmcs12->vm_entry_controls =
7420 (vmcs12->vm_entry_controls & ~VM_ENTRY_IA32E_MODE) |
7421 (vmcs_read32(VM_ENTRY_CONTROLS) & VM_ENTRY_IA32E_MODE);
7422
4704d0be
NHE		 7423 /* TODO: These cannot have changed unless we have MSR bitmaps and
7424 * the relevant bit asks not to trap the change */
7425 vmcs12->guest_ia32_debugctl = vmcs_read64(GUEST_IA32_DEBUGCTL);
7426 if (vmcs12->vm_entry_controls & VM_EXIT_SAVE_IA32_PAT)
7427 vmcs12->guest_ia32_pat = vmcs_read64(GUEST_IA32_PAT);
7428 vmcs12->guest_sysenter_cs = vmcs_read32(GUEST_SYSENTER_CS);
7429 vmcs12->guest_sysenter_esp = vmcs_readl(GUEST_SYSENTER_ESP);
7430 vmcs12->guest_sysenter_eip = vmcs_readl(GUEST_SYSENTER_EIP);
7431
7432 /* update exit information fields: */
7433
957c897e 7434 vmcs12->vm_exit_reason = to_vmx(vcpu)->exit_reason;
4704d0be
NHE		 7435 vmcs12->exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
7436
7437 vmcs12->vm_exit_intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
7438 vmcs12->vm_exit_intr_error_code = vmcs_read32(VM_EXIT_INTR_ERROR_CODE);
44ceb9d6 7439 vmcs12->idt_vectoring_info_field = to_vmx(vcpu)->idt_vectoring_info;
4704d0be
NHE		 7440 vmcs12->idt_vectoring_error_code =
7441 vmcs_read32(IDT_VECTORING_ERROR_CODE);
7442 vmcs12->vm_exit_instruction_len = vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
7443 vmcs12->vmx_instruction_info = vmcs_read32(VMX_INSTRUCTION_INFO);
7444
7445 /* clear vm-entry fields which are to be cleared on exit */
7446 if (!(vmcs12->vm_exit_reason & VMX_EXIT_REASONS_FAILED_VMENTRY))
7447 vmcs12->vm_entry_intr_info_field &= ~INTR_INFO_VALID_MASK;
7448}
7449
7450/*
7451 * A part of what we need to when the nested L2 guest exits and we want to
7452 * run its L1 parent, is to reset L1's guest state to the host state specified
7453 * in vmcs12.
7454 * This function is to be called not only on normal nested exit, but also on
7455 * a nested entry failure, as explained in Intel's spec, 3B.23.7 ("VM-Entry
7456 * Failures During or After Loading Guest State").
7457 * This function should be called when the active VMCS is L1's (vmcs01).
7458 */
733568f9
JK		 7459static void load_vmcs12_host_state(struct kvm_vcpu *vcpu,
7460 struct vmcs12 *vmcs12)
4704d0be
NHE		 7461{
7462 if (vmcs12->vm_exit_controls & VM_EXIT_LOAD_IA32_EFER)
7463 vcpu->arch.efer = vmcs12->host_ia32_efer;
7464 if (vmcs12->vm_exit_controls & VM_EXIT_HOST_ADDR_SPACE_SIZE)
7465 vcpu->arch.efer |= (EFER_LMA | EFER_LME);
7466 else
7467 vcpu->arch.efer &= ~(EFER_LMA | EFER_LME);
7468 vmx_set_efer(vcpu, vcpu->arch.efer);
7469
7470 kvm_register_write(vcpu, VCPU_REGS_RSP, vmcs12->host_rsp);
7471 kvm_register_write(vcpu, VCPU_REGS_RIP, vmcs12->host_rip);
c4627c72 7472 vmx_set_rflags(vcpu, X86_EFLAGS_BIT1);
4704d0be
NHE		 7473 /*
7474 * Note that calling vmx_set_cr0 is important, even if cr0 hasn't
7475 * actually changed, because it depends on the current state of
7476 * fpu_active (which may have changed).
7477 * Note that vmx_set_cr0 refers to efer set above.
7478 */
7479 kvm_set_cr0(vcpu, vmcs12->host_cr0);
7480 /*
7481 * If we did fpu_activate()/fpu_deactivate() during L2's run, we need
7482 * to apply the same changes to L1's vmcs. We just set cr0 correctly,
7483 * but we also need to update cr0_guest_host_mask and exception_bitmap.
7484 */
7485 update_exception_bitmap(vcpu);
7486 vcpu->arch.cr0_guest_owned_bits = (vcpu->fpu_active ? X86_CR0_TS : 0);
7487 vmcs_writel(CR0_GUEST_HOST_MASK, ~vcpu->arch.cr0_guest_owned_bits);
7488
7489 /*
7490 * Note that CR4_GUEST_HOST_MASK is already set in the original vmcs01
7491 * (KVM doesn't change it)- no reason to call set_cr4_guest_host_mask();
7492 */
7493 vcpu->arch.cr4_guest_owned_bits = ~vmcs_readl(CR4_GUEST_HOST_MASK);
7494 kvm_set_cr4(vcpu, vmcs12->host_cr4);
7495
7496 /* shadow page tables on either EPT or shadow page tables */
7497 kvm_set_cr3(vcpu, vmcs12->host_cr3);
7498 kvm_mmu_reset_context(vcpu);
7499
7500 if (enable_vpid) {
7501 /*
7502 * Trivially support vpid by letting L2s share their parent
7503 * L1's vpid. TODO: move to a more elaborate solution, giving
7504 * each L2 its own vpid and exposing the vpid feature to L1.
7505 */
7506 vmx_flush_tlb(vcpu);
7507 }
7508
7509
7510 vmcs_write32(GUEST_SYSENTER_CS, vmcs12->host_ia32_sysenter_cs);
7511 vmcs_writel(GUEST_SYSENTER_ESP, vmcs12->host_ia32_sysenter_esp);
7512 vmcs_writel(GUEST_SYSENTER_EIP, vmcs12->host_ia32_sysenter_eip);
7513 vmcs_writel(GUEST_IDTR_BASE, vmcs12->host_idtr_base);
7514 vmcs_writel(GUEST_GDTR_BASE, vmcs12->host_gdtr_base);
7515 vmcs_writel(GUEST_TR_BASE, vmcs12->host_tr_base);
7516 vmcs_writel(GUEST_GS_BASE, vmcs12->host_gs_base);
7517 vmcs_writel(GUEST_FS_BASE, vmcs12->host_fs_base);
7518 vmcs_write16(GUEST_ES_SELECTOR, vmcs12->host_es_selector);
7519 vmcs_write16(GUEST_CS_SELECTOR, vmcs12->host_cs_selector);
7520 vmcs_write16(GUEST_SS_SELECTOR, vmcs12->host_ss_selector);
7521 vmcs_write16(GUEST_DS_SELECTOR, vmcs12->host_ds_selector);
7522 vmcs_write16(GUEST_FS_SELECTOR, vmcs12->host_fs_selector);
7523 vmcs_write16(GUEST_GS_SELECTOR, vmcs12->host_gs_selector);
7524 vmcs_write16(GUEST_TR_SELECTOR, vmcs12->host_tr_selector);
7525
7526 if (vmcs12->vm_exit_controls & VM_EXIT_LOAD_IA32_PAT)
7527 vmcs_write64(GUEST_IA32_PAT, vmcs12->host_ia32_pat);
7528 if (vmcs12->vm_exit_controls & VM_EXIT_LOAD_IA32_PERF_GLOBAL_CTRL)
7529 vmcs_write64(GUEST_IA32_PERF_GLOBAL_CTRL,
7530 vmcs12->host_ia32_perf_global_ctrl);
503cd0c5
JK		 7531
7532 kvm_set_dr(vcpu, 7, 0x400);
7533 vmcs_write64(GUEST_IA32_DEBUGCTL, 0);
4704d0be
NHE		 7534}
7535
7536/*
7537 * Emulate an exit from nested guest (L2) to L1, i.e., prepare to run L1
7538 * and modify vmcs12 to make it see what it would expect to see there if
7539 * L2 was its real guest. Must only be called when in L2 (is_guest_mode())
7540 */
7541static void nested_vmx_vmexit(struct kvm_vcpu *vcpu)
7542{
7543 struct vcpu_vmx *vmx = to_vmx(vcpu);
7544 int cpu;
7545 struct vmcs12 *vmcs12 = get_vmcs12(vcpu);
7546
7547 leave_guest_mode(vcpu);
7548 prepare_vmcs12(vcpu, vmcs12);
7549
7550 cpu = get_cpu();
7551 vmx->loaded_vmcs = &vmx->vmcs01;
7552 vmx_vcpu_put(vcpu);
7553 vmx_vcpu_load(vcpu, cpu);
7554 vcpu->cpu = cpu;
7555 put_cpu();
7556
36c3cc42
JK		 7557 vmx_segment_cache_clear(vmx);
7558
4704d0be
NHE		 7559 /* if no vmcs02 cache requested, remove the one we used */
7560 if (VMCS02_POOL_SIZE == 0)
7561 nested_free_vmcs02(vmx, vmx->nested.current_vmptr);
7562
7563 load_vmcs12_host_state(vcpu, vmcs12);
7564
27fc51b2 7565 /* Update TSC_OFFSET if TSC was changed while L2 ran */
4704d0be
NHE		 7566 vmcs_write64(TSC_OFFSET, vmx->nested.vmcs01_tsc_offset);
7567
7568 /* This is needed for same reason as it was needed in prepare_vmcs02 */
7569 vmx->host_rsp = 0;
7570
7571 /* Unpin physical memory we referred to in vmcs02 */
7572 if (vmx->nested.apic_access_page) {
7573 nested_release_page(vmx->nested.apic_access_page);
7574 vmx->nested.apic_access_page = 0;
7575 }
7576
7577 /*
7578 * Exiting from L2 to L1, we're now back to L1 which thinks it just
7579 * finished a VMLAUNCH or VMRESUME instruction, so we need to set the
7580 * success or failure flag accordingly.
7581 */
7582 if (unlikely(vmx->fail)) {
7583 vmx->fail = 0;
7584 nested_vmx_failValid(vcpu, vmcs_read32(VM_INSTRUCTION_ERROR));
7585 } else
7586 nested_vmx_succeed(vcpu);
7587}
7588
7c177938
NHE		 7589/*
7590 * L1's failure to enter L2 is a subset of a normal exit, as explained in
7591 * 23.7 "VM-entry failures during or after loading guest state" (this also
7592 * lists the acceptable exit-reason and exit-qualification parameters).
7593 * It should only be called before L2 actually succeeded to run, and when
7594 * vmcs01 is current (it doesn't leave_guest_mode() or switch vmcss).
7595 */
7596static void nested_vmx_entry_failure(struct kvm_vcpu *vcpu,
7597 struct vmcs12 *vmcs12,
7598 u32 reason, unsigned long qualification)
7599{
7600 load_vmcs12_host_state(vcpu, vmcs12);
7601 vmcs12->vm_exit_reason = reason | VMX_EXIT_REASONS_FAILED_VMENTRY;
7602 vmcs12->exit_qualification = qualification;
7603 nested_vmx_succeed(vcpu);
7604}
7605
8a76d7f2
JR		 7606static int vmx_check_intercept(struct kvm_vcpu *vcpu,
7607 struct x86_instruction_info *info,
7608 enum x86_intercept_stage stage)
7609{
7610 return X86EMUL_CONTINUE;
7611}
7612
cbdd1bea 7613static struct kvm_x86_ops vmx_x86_ops = {
6aa8b732
AK		 7614 .cpu_has_kvm_support = cpu_has_kvm_support,
7615 .disabled_by_bios = vmx_disabled_by_bios,
7616 .hardware_setup = hardware_setup,
7617 .hardware_unsetup = hardware_unsetup,
002c7f7c 7618 .check_processor_compatibility = vmx_check_processor_compat,
6aa8b732
AK		 7619 .hardware_enable = hardware_enable,
7620 .hardware_disable = hardware_disable,
04547156 7621 .cpu_has_accelerated_tpr = report_flexpriority,
6aa8b732
AK		 7622
7623 .vcpu_create = vmx_create_vcpu,
7624 .vcpu_free = vmx_free_vcpu,
04d2cc77 7625 .vcpu_reset = vmx_vcpu_reset,
6aa8b732 7626
04d2cc77 7627 .prepare_guest_switch = vmx_save_host_state,
6aa8b732
AK		 7628 .vcpu_load = vmx_vcpu_load,
7629 .vcpu_put = vmx_vcpu_put,
7630
c8639010 7631 .update_db_bp_intercept = update_exception_bitmap,
6aa8b732
AK		 7632 .get_msr = vmx_get_msr,
7633 .set_msr = vmx_set_msr,
7634 .get_segment_base = vmx_get_segment_base,
7635 .get_segment = vmx_get_segment,
7636 .set_segment = vmx_set_segment,
2e4d2653 7637 .get_cpl = vmx_get_cpl,
6aa8b732 7638 .get_cs_db_l_bits = vmx_get_cs_db_l_bits,
e8467fda 7639 .decache_cr0_guest_bits = vmx_decache_cr0_guest_bits,
aff48baa 7640 .decache_cr3 = vmx_decache_cr3,
25c4c276 7641 .decache_cr4_guest_bits = vmx_decache_cr4_guest_bits,
6aa8b732 7642 .set_cr0 = vmx_set_cr0,
6aa8b732
AK		 7643 .set_cr3 = vmx_set_cr3,
7644 .set_cr4 = vmx_set_cr4,
6aa8b732 7645 .set_efer = vmx_set_efer,
6aa8b732
AK		 7646 .get_idt = vmx_get_idt,
7647 .set_idt = vmx_set_idt,
7648 .get_gdt = vmx_get_gdt,
7649 .set_gdt = vmx_set_gdt,
020df079 7650 .set_dr7 = vmx_set_dr7,
5fdbf976 7651 .cache_reg = vmx_cache_reg,
6aa8b732
AK		 7652 .get_rflags = vmx_get_rflags,
7653 .set_rflags = vmx_set_rflags,
ebcbab4c 7654 .fpu_activate = vmx_fpu_activate,
02daab21 7655 .fpu_deactivate = vmx_fpu_deactivate,
6aa8b732
AK		 7656
7657 .tlb_flush = vmx_flush_tlb,
6aa8b732 7658
6aa8b732 7659 .run = vmx_vcpu_run,
6062d012 7660 .handle_exit = vmx_handle_exit,
6aa8b732 7661 .skip_emulated_instruction = skip_emulated_instruction,
2809f5d2
GC		 7662 .set_interrupt_shadow = vmx_set_interrupt_shadow,
7663 .get_interrupt_shadow = vmx_get_interrupt_shadow,
102d8325 7664 .patch_hypercall = vmx_patch_hypercall,
2a8067f1 7665 .set_irq = vmx_inject_irq,
95ba8273 7666 .set_nmi = vmx_inject_nmi,
298101da 7667 .queue_exception = vmx_queue_exception,
b463a6f7 7668 .cancel_injection = vmx_cancel_injection,
78646121 7669 .interrupt_allowed = vmx_interrupt_allowed,
95ba8273 7670 .nmi_allowed = vmx_nmi_allowed,
3cfc3092
JK		 7671 .get_nmi_mask = vmx_get_nmi_mask,
7672 .set_nmi_mask = vmx_set_nmi_mask,
95ba8273
GN		 7673 .enable_nmi_window = enable_nmi_window,
7674 .enable_irq_window = enable_irq_window,
7675 .update_cr8_intercept = update_cr8_intercept,
8d14695f 7676 .set_virtual_x2apic_mode = vmx_set_virtual_x2apic_mode,
c7c9c56c
YZ		 7677 .vm_has_apicv = vmx_vm_has_apicv,
7678 .load_eoi_exitmap = vmx_load_eoi_exitmap,
7679 .hwapic_irr_update = vmx_hwapic_irr_update,
7680 .hwapic_isr_update = vmx_hwapic_isr_update,
95ba8273 7681
cbc94022 7682 .set_tss_addr = vmx_set_tss_addr,
67253af5 7683 .get_tdp_level = get_ept_level,
4b12f0de 7684 .get_mt_mask = vmx_get_mt_mask,
229456fc 7685
586f9607 7686 .get_exit_info = vmx_get_exit_info,
586f9607 7687
17cc3935 7688 .get_lpage_level = vmx_get_lpage_level,
0e851880
SY		 7689
7690 .cpuid_update = vmx_cpuid_update,
4e47c7a6
SY		 7691
7692 .rdtscp_supported = vmx_rdtscp_supported,
ad756a16 7693 .invpcid_supported = vmx_invpcid_supported,
d4330ef2
JR		 7694
7695 .set_supported_cpuid = vmx_set_supported_cpuid,
f5f48ee1
SY		 7696
7697 .has_wbinvd_exit = cpu_has_vmx_wbinvd_exit,
99e3e30a 7698
4051b188 7699 .set_tsc_khz = vmx_set_tsc_khz,
ba904635 7700 .read_tsc_offset = vmx_read_tsc_offset,
99e3e30a 7701 .write_tsc_offset = vmx_write_tsc_offset,
e48672fa 7702 .adjust_tsc_offset = vmx_adjust_tsc_offset,
857e4099 7703 .compute_tsc_offset = vmx_compute_tsc_offset,
d5c1785d 7704 .read_l1_tsc = vmx_read_l1_tsc,
1c97f0a0
JR		 7705
7706 .set_tdp_cr3 = vmx_set_cr3,
8a76d7f2
JR		 7707
7708 .check_intercept = vmx_check_intercept,
6aa8b732
AK		 7709};
7710
7711static int __init vmx_init(void)
7712{
8d14695f 7713 int r, i, msr;
26bb0981
AK		 7714
7715 rdmsrl_safe(MSR_EFER, &host_efer);
7716
7717 for (i = 0; i < NR_VMX_MSR; ++i)
7718 kvm_define_shared_msr(i, vmx_msr_index[i]);
fdef3ad1 7719
3e7c73e9 7720 vmx_io_bitmap_a = (unsigned long *)__get_free_page(GFP_KERNEL);
fdef3ad1
HQ		 7721 if (!vmx_io_bitmap_a)
7722 return -ENOMEM;
7723
2106a548
GC		 7724 r = -ENOMEM;
7725
3e7c73e9 7726 vmx_io_bitmap_b = (unsigned long *)__get_free_page(GFP_KERNEL);
2106a548 7727 if (!vmx_io_bitmap_b)
fdef3ad1 7728 goto out;
fdef3ad1 7729
5897297b 7730 vmx_msr_bitmap_legacy = (unsigned long *)__get_free_page(GFP_KERNEL);
2106a548 7731 if (!vmx_msr_bitmap_legacy)
25c5f225 7732 goto out1;
2106a548 7733
8d14695f
YZ		 7734 vmx_msr_bitmap_legacy_x2apic =
7735 (unsigned long *)__get_free_page(GFP_KERNEL);
7736 if (!vmx_msr_bitmap_legacy_x2apic)
7737 goto out2;
25c5f225 7738
5897297b 7739 vmx_msr_bitmap_longmode = (unsigned long *)__get_free_page(GFP_KERNEL);
2106a548 7740 if (!vmx_msr_bitmap_longmode)
8d14695f 7741 goto out3;
2106a548 7742
8d14695f
YZ		 7743 vmx_msr_bitmap_longmode_x2apic =
7744 (unsigned long *)__get_free_page(GFP_KERNEL);
7745 if (!vmx_msr_bitmap_longmode_x2apic)
7746 goto out4;
5897297b 7747
fdef3ad1
HQ		 7748 /*
7749 * Allow direct access to the PC debug port (it is often used for I/O
7750 * delays, but the vmexits simply slow things down).
7751 */
3e7c73e9
AK		 7752 memset(vmx_io_bitmap_a, 0xff, PAGE_SIZE);
7753 clear_bit(0x80, vmx_io_bitmap_a);
fdef3ad1 7754
3e7c73e9 7755 memset(vmx_io_bitmap_b, 0xff, PAGE_SIZE);
fdef3ad1 7756
5897297b
AK		 7757 memset(vmx_msr_bitmap_legacy, 0xff, PAGE_SIZE);
7758 memset(vmx_msr_bitmap_longmode, 0xff, PAGE_SIZE);
25c5f225 7759
2384d2b3
SY		 7760 set_bit(0, vmx_vpid_bitmap); /* 0 is reserved for host */
7761
0ee75bea
AK		 7762 r = kvm_init(&vmx_x86_ops, sizeof(struct vcpu_vmx),
7763 __alignof__(struct vcpu_vmx), THIS_MODULE);
fdef3ad1 7764 if (r)
5897297b 7765 goto out3;
25c5f225 7766
8f536b76
ZY		 7767#ifdef CONFIG_KEXEC
7768 rcu_assign_pointer(crash_vmclear_loaded_vmcss,
7769 crash_vmclear_local_loaded_vmcss);
7770#endif
7771
5897297b
AK		 7772 vmx_disable_intercept_for_msr(MSR_FS_BASE, false);
7773 vmx_disable_intercept_for_msr(MSR_GS_BASE, false);
7774 vmx_disable_intercept_for_msr(MSR_KERNEL_GS_BASE, true);
7775 vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_CS, false);
7776 vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_ESP, false);
7777 vmx_disable_intercept_for_msr(MSR_IA32_SYSENTER_EIP, false);
8d14695f
YZ		 7778 memcpy(vmx_msr_bitmap_legacy_x2apic,
7779 vmx_msr_bitmap_legacy, PAGE_SIZE);
7780 memcpy(vmx_msr_bitmap_longmode_x2apic,
7781 vmx_msr_bitmap_longmode, PAGE_SIZE);
7782
c7c9c56c 7783 if (enable_apicv_reg_vid) {
8d14695f
YZ		 7784 for (msr = 0x800; msr <= 0x8ff; msr++)
7785 vmx_disable_intercept_msr_read_x2apic(msr);
7786
7787 /* According SDM, in x2apic mode, the whole id reg is used.
7788 * But in KVM, it only use the highest eight bits. Need to
7789 * intercept it */
7790 vmx_enable_intercept_msr_read_x2apic(0x802);
7791 /* TMCCT */
7792 vmx_enable_intercept_msr_read_x2apic(0x839);
7793 /* TPR */
7794 vmx_disable_intercept_msr_write_x2apic(0x808);
c7c9c56c
YZ		 7795 /* EOI */
7796 vmx_disable_intercept_msr_write_x2apic(0x80b);
7797 /* SELF-IPI */
7798 vmx_disable_intercept_msr_write_x2apic(0x83f);
8d14695f 7799 }
fdef3ad1 7800
089d034e 7801 if (enable_ept) {
3f6d8c8a
XH		 7802 kvm_mmu_set_mask_ptes(0ull,
7803 (enable_ept_ad_bits) ? VMX_EPT_ACCESS_BIT : 0ull,
7804 (enable_ept_ad_bits) ? VMX_EPT_DIRTY_BIT : 0ull,
7805 0ull, VMX_EPT_EXECUTABLE_MASK);
ce88decf 7806 ept_set_mmio_spte_mask();
5fdbcb9d
SY		 7807 kvm_enable_tdp();
7808 } else
7809 kvm_disable_tdp();
1439442c 7810
fdef3ad1
HQ		 7811 return 0;
7812
8d14695f 7813out4:
5897297b 7814 free_page((unsigned long)vmx_msr_bitmap_longmode);
8d14695f
YZ		 7815out3:
7816 free_page((unsigned long)vmx_msr_bitmap_legacy_x2apic);
25c5f225 7817out2:
5897297b 7818 free_page((unsigned long)vmx_msr_bitmap_legacy);
fdef3ad1 7819out1:
3e7c73e9 7820 free_page((unsigned long)vmx_io_bitmap_b);
fdef3ad1 7821out:
3e7c73e9 7822 free_page((unsigned long)vmx_io_bitmap_a);
fdef3ad1 7823 return r;
6aa8b732
AK		 7824}
7825
7826static void __exit vmx_exit(void)
7827{
8d14695f
YZ		 7828 free_page((unsigned long)vmx_msr_bitmap_legacy_x2apic);
7829 free_page((unsigned long)vmx_msr_bitmap_longmode_x2apic);
5897297b
AK		 7830 free_page((unsigned long)vmx_msr_bitmap_legacy);
7831 free_page((unsigned long)vmx_msr_bitmap_longmode);
3e7c73e9
AK		 7832 free_page((unsigned long)vmx_io_bitmap_b);
7833 free_page((unsigned long)vmx_io_bitmap_a);
fdef3ad1 7834
8f536b76
ZY		 7835#ifdef CONFIG_KEXEC
7836 rcu_assign_pointer(crash_vmclear_loaded_vmcss, NULL);
7837 synchronize_rcu();
7838#endif
7839
cb498ea2 7840 kvm_exit();
6aa8b732
AK		 7841}
7842
7843module_init(vmx_init)
7844module_exit(vmx_exit)
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