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Commit | Line | Data |
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043405e1 CO |
1 | /* |
2 | * Kernel-based Virtual Machine driver for Linux | |
3 | * | |
4 | * derived from drivers/kvm/kvm_main.c | |
5 | * | |
6 | * Copyright (C) 2006 Qumranet, Inc. | |
4d5c5d0f BAY |
7 | * Copyright (C) 2008 Qumranet, Inc. |
8 | * Copyright IBM Corporation, 2008 | |
043405e1 CO |
9 | * |
10 | * Authors: | |
11 | * Avi Kivity <avi@qumranet.com> | |
12 | * Yaniv Kamay <yaniv@qumranet.com> | |
4d5c5d0f BAY |
13 | * Amit Shah <amit.shah@qumranet.com> |
14 | * Ben-Ami Yassour <benami@il.ibm.com> | |
043405e1 CO |
15 | * |
16 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
17 | * the COPYING file in the top-level directory. | |
18 | * | |
19 | */ | |
20 | ||
edf88417 | 21 | #include <linux/kvm_host.h> |
313a3dc7 | 22 | #include "irq.h" |
1d737c8a | 23 | #include "mmu.h" |
7837699f | 24 | #include "i8254.h" |
37817f29 | 25 | #include "tss.h" |
5fdbf976 | 26 | #include "kvm_cache_regs.h" |
26eef70c | 27 | #include "x86.h" |
313a3dc7 | 28 | |
18068523 | 29 | #include <linux/clocksource.h> |
4d5c5d0f | 30 | #include <linux/interrupt.h> |
313a3dc7 CO |
31 | #include <linux/kvm.h> |
32 | #include <linux/fs.h> | |
33 | #include <linux/vmalloc.h> | |
5fb76f9b | 34 | #include <linux/module.h> |
0de10343 | 35 | #include <linux/mman.h> |
2bacc55c | 36 | #include <linux/highmem.h> |
19de40a8 | 37 | #include <linux/iommu.h> |
62c476c7 | 38 | #include <linux/intel-iommu.h> |
c8076604 | 39 | #include <linux/cpufreq.h> |
aec51dc4 AK |
40 | #include <trace/events/kvm.h> |
41 | #undef TRACE_INCLUDE_FILE | |
229456fc MT |
42 | #define CREATE_TRACE_POINTS |
43 | #include "trace.h" | |
043405e1 CO |
44 | |
45 | #include <asm/uaccess.h> | |
d825ed0a | 46 | #include <asm/msr.h> |
a5f61300 | 47 | #include <asm/desc.h> |
0bed3b56 | 48 | #include <asm/mtrr.h> |
890ca9ae | 49 | #include <asm/mce.h> |
043405e1 | 50 | |
313a3dc7 | 51 | #define MAX_IO_MSRS 256 |
a03490ed CO |
52 | #define CR0_RESERVED_BITS \ |
53 | (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \ | |
54 | | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \ | |
55 | | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG)) | |
56 | #define CR4_RESERVED_BITS \ | |
57 | (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\ | |
58 | | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \ | |
59 | | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \ | |
60 | | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE)) | |
61 | ||
62 | #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR) | |
890ca9ae HY |
63 | |
64 | #define KVM_MAX_MCE_BANKS 32 | |
65 | #define KVM_MCE_CAP_SUPPORTED MCG_CTL_P | |
66 | ||
50a37eb4 JR |
67 | /* EFER defaults: |
68 | * - enable syscall per default because its emulated by KVM | |
69 | * - enable LME and LMA per default on 64 bit KVM | |
70 | */ | |
71 | #ifdef CONFIG_X86_64 | |
72 | static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffafeULL; | |
73 | #else | |
74 | static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffffeULL; | |
75 | #endif | |
313a3dc7 | 76 | |
ba1389b7 AK |
77 | #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM |
78 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU | |
417bc304 | 79 | |
674eea0f AK |
80 | static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, |
81 | struct kvm_cpuid_entry2 __user *entries); | |
82 | ||
97896d04 | 83 | struct kvm_x86_ops *kvm_x86_ops; |
5fdbf976 | 84 | EXPORT_SYMBOL_GPL(kvm_x86_ops); |
97896d04 | 85 | |
ed85c068 AP |
86 | int ignore_msrs = 0; |
87 | module_param_named(ignore_msrs, ignore_msrs, bool, S_IRUGO | S_IWUSR); | |
88 | ||
417bc304 | 89 | struct kvm_stats_debugfs_item debugfs_entries[] = { |
ba1389b7 AK |
90 | { "pf_fixed", VCPU_STAT(pf_fixed) }, |
91 | { "pf_guest", VCPU_STAT(pf_guest) }, | |
92 | { "tlb_flush", VCPU_STAT(tlb_flush) }, | |
93 | { "invlpg", VCPU_STAT(invlpg) }, | |
94 | { "exits", VCPU_STAT(exits) }, | |
95 | { "io_exits", VCPU_STAT(io_exits) }, | |
96 | { "mmio_exits", VCPU_STAT(mmio_exits) }, | |
97 | { "signal_exits", VCPU_STAT(signal_exits) }, | |
98 | { "irq_window", VCPU_STAT(irq_window_exits) }, | |
f08864b4 | 99 | { "nmi_window", VCPU_STAT(nmi_window_exits) }, |
ba1389b7 AK |
100 | { "halt_exits", VCPU_STAT(halt_exits) }, |
101 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, | |
f11c3a8d | 102 | { "hypercalls", VCPU_STAT(hypercalls) }, |
ba1389b7 AK |
103 | { "request_irq", VCPU_STAT(request_irq_exits) }, |
104 | { "irq_exits", VCPU_STAT(irq_exits) }, | |
105 | { "host_state_reload", VCPU_STAT(host_state_reload) }, | |
106 | { "efer_reload", VCPU_STAT(efer_reload) }, | |
107 | { "fpu_reload", VCPU_STAT(fpu_reload) }, | |
108 | { "insn_emulation", VCPU_STAT(insn_emulation) }, | |
109 | { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) }, | |
fa89a817 | 110 | { "irq_injections", VCPU_STAT(irq_injections) }, |
c4abb7c9 | 111 | { "nmi_injections", VCPU_STAT(nmi_injections) }, |
4cee5764 AK |
112 | { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) }, |
113 | { "mmu_pte_write", VM_STAT(mmu_pte_write) }, | |
114 | { "mmu_pte_updated", VM_STAT(mmu_pte_updated) }, | |
115 | { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) }, | |
116 | { "mmu_flooded", VM_STAT(mmu_flooded) }, | |
117 | { "mmu_recycled", VM_STAT(mmu_recycled) }, | |
dfc5aa00 | 118 | { "mmu_cache_miss", VM_STAT(mmu_cache_miss) }, |
4731d4c7 | 119 | { "mmu_unsync", VM_STAT(mmu_unsync) }, |
0f74a24c | 120 | { "remote_tlb_flush", VM_STAT(remote_tlb_flush) }, |
05da4558 | 121 | { "largepages", VM_STAT(lpages) }, |
417bc304 HB |
122 | { NULL } |
123 | }; | |
124 | ||
5fb76f9b CO |
125 | unsigned long segment_base(u16 selector) |
126 | { | |
127 | struct descriptor_table gdt; | |
a5f61300 | 128 | struct desc_struct *d; |
5fb76f9b CO |
129 | unsigned long table_base; |
130 | unsigned long v; | |
131 | ||
132 | if (selector == 0) | |
133 | return 0; | |
134 | ||
135 | asm("sgdt %0" : "=m"(gdt)); | |
136 | table_base = gdt.base; | |
137 | ||
138 | if (selector & 4) { /* from ldt */ | |
139 | u16 ldt_selector; | |
140 | ||
141 | asm("sldt %0" : "=g"(ldt_selector)); | |
142 | table_base = segment_base(ldt_selector); | |
143 | } | |
a5f61300 AK |
144 | d = (struct desc_struct *)(table_base + (selector & ~7)); |
145 | v = d->base0 | ((unsigned long)d->base1 << 16) | | |
146 | ((unsigned long)d->base2 << 24); | |
5fb76f9b | 147 | #ifdef CONFIG_X86_64 |
a5f61300 AK |
148 | if (d->s == 0 && (d->type == 2 || d->type == 9 || d->type == 11)) |
149 | v |= ((unsigned long)((struct ldttss_desc64 *)d)->base3) << 32; | |
5fb76f9b CO |
150 | #endif |
151 | return v; | |
152 | } | |
153 | EXPORT_SYMBOL_GPL(segment_base); | |
154 | ||
6866b83e CO |
155 | u64 kvm_get_apic_base(struct kvm_vcpu *vcpu) |
156 | { | |
157 | if (irqchip_in_kernel(vcpu->kvm)) | |
ad312c7c | 158 | return vcpu->arch.apic_base; |
6866b83e | 159 | else |
ad312c7c | 160 | return vcpu->arch.apic_base; |
6866b83e CO |
161 | } |
162 | EXPORT_SYMBOL_GPL(kvm_get_apic_base); | |
163 | ||
164 | void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data) | |
165 | { | |
166 | /* TODO: reserve bits check */ | |
167 | if (irqchip_in_kernel(vcpu->kvm)) | |
168 | kvm_lapic_set_base(vcpu, data); | |
169 | else | |
ad312c7c | 170 | vcpu->arch.apic_base = data; |
6866b83e CO |
171 | } |
172 | EXPORT_SYMBOL_GPL(kvm_set_apic_base); | |
173 | ||
298101da AK |
174 | void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
175 | { | |
ad312c7c ZX |
176 | WARN_ON(vcpu->arch.exception.pending); |
177 | vcpu->arch.exception.pending = true; | |
178 | vcpu->arch.exception.has_error_code = false; | |
179 | vcpu->arch.exception.nr = nr; | |
298101da AK |
180 | } |
181 | EXPORT_SYMBOL_GPL(kvm_queue_exception); | |
182 | ||
c3c91fee AK |
183 | void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long addr, |
184 | u32 error_code) | |
185 | { | |
186 | ++vcpu->stat.pf_guest; | |
d8017474 | 187 | |
71c4dfaf | 188 | if (vcpu->arch.exception.pending) { |
6edf14d8 GN |
189 | switch(vcpu->arch.exception.nr) { |
190 | case DF_VECTOR: | |
71c4dfaf JR |
191 | /* triple fault -> shutdown */ |
192 | set_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests); | |
6edf14d8 GN |
193 | return; |
194 | case PF_VECTOR: | |
195 | vcpu->arch.exception.nr = DF_VECTOR; | |
196 | vcpu->arch.exception.error_code = 0; | |
197 | return; | |
198 | default: | |
199 | /* replace previous exception with a new one in a hope | |
200 | that instruction re-execution will regenerate lost | |
201 | exception */ | |
202 | vcpu->arch.exception.pending = false; | |
203 | break; | |
71c4dfaf | 204 | } |
c3c91fee | 205 | } |
ad312c7c | 206 | vcpu->arch.cr2 = addr; |
c3c91fee AK |
207 | kvm_queue_exception_e(vcpu, PF_VECTOR, error_code); |
208 | } | |
209 | ||
3419ffc8 SY |
210 | void kvm_inject_nmi(struct kvm_vcpu *vcpu) |
211 | { | |
212 | vcpu->arch.nmi_pending = 1; | |
213 | } | |
214 | EXPORT_SYMBOL_GPL(kvm_inject_nmi); | |
215 | ||
298101da AK |
216 | void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
217 | { | |
ad312c7c ZX |
218 | WARN_ON(vcpu->arch.exception.pending); |
219 | vcpu->arch.exception.pending = true; | |
220 | vcpu->arch.exception.has_error_code = true; | |
221 | vcpu->arch.exception.nr = nr; | |
222 | vcpu->arch.exception.error_code = error_code; | |
298101da AK |
223 | } |
224 | EXPORT_SYMBOL_GPL(kvm_queue_exception_e); | |
225 | ||
a03490ed CO |
226 | /* |
227 | * Load the pae pdptrs. Return true is they are all valid. | |
228 | */ | |
229 | int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3) | |
230 | { | |
231 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; | |
232 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; | |
233 | int i; | |
234 | int ret; | |
ad312c7c | 235 | u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)]; |
a03490ed | 236 | |
a03490ed CO |
237 | ret = kvm_read_guest_page(vcpu->kvm, pdpt_gfn, pdpte, |
238 | offset * sizeof(u64), sizeof(pdpte)); | |
239 | if (ret < 0) { | |
240 | ret = 0; | |
241 | goto out; | |
242 | } | |
243 | for (i = 0; i < ARRAY_SIZE(pdpte); ++i) { | |
43a3795a | 244 | if (is_present_gpte(pdpte[i]) && |
20c466b5 | 245 | (pdpte[i] & vcpu->arch.mmu.rsvd_bits_mask[0][2])) { |
a03490ed CO |
246 | ret = 0; |
247 | goto out; | |
248 | } | |
249 | } | |
250 | ret = 1; | |
251 | ||
ad312c7c | 252 | memcpy(vcpu->arch.pdptrs, pdpte, sizeof(vcpu->arch.pdptrs)); |
6de4f3ad AK |
253 | __set_bit(VCPU_EXREG_PDPTR, |
254 | (unsigned long *)&vcpu->arch.regs_avail); | |
255 | __set_bit(VCPU_EXREG_PDPTR, | |
256 | (unsigned long *)&vcpu->arch.regs_dirty); | |
a03490ed | 257 | out: |
a03490ed CO |
258 | |
259 | return ret; | |
260 | } | |
cc4b6871 | 261 | EXPORT_SYMBOL_GPL(load_pdptrs); |
a03490ed | 262 | |
d835dfec AK |
263 | static bool pdptrs_changed(struct kvm_vcpu *vcpu) |
264 | { | |
ad312c7c | 265 | u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)]; |
d835dfec AK |
266 | bool changed = true; |
267 | int r; | |
268 | ||
269 | if (is_long_mode(vcpu) || !is_pae(vcpu)) | |
270 | return false; | |
271 | ||
6de4f3ad AK |
272 | if (!test_bit(VCPU_EXREG_PDPTR, |
273 | (unsigned long *)&vcpu->arch.regs_avail)) | |
274 | return true; | |
275 | ||
ad312c7c | 276 | r = kvm_read_guest(vcpu->kvm, vcpu->arch.cr3 & ~31u, pdpte, sizeof(pdpte)); |
d835dfec AK |
277 | if (r < 0) |
278 | goto out; | |
ad312c7c | 279 | changed = memcmp(pdpte, vcpu->arch.pdptrs, sizeof(pdpte)) != 0; |
d835dfec | 280 | out: |
d835dfec AK |
281 | |
282 | return changed; | |
283 | } | |
284 | ||
2d3ad1f4 | 285 | void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
a03490ed CO |
286 | { |
287 | if (cr0 & CR0_RESERVED_BITS) { | |
288 | printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n", | |
ad312c7c | 289 | cr0, vcpu->arch.cr0); |
c1a5d4f9 | 290 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
291 | return; |
292 | } | |
293 | ||
294 | if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) { | |
295 | printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n"); | |
c1a5d4f9 | 296 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
297 | return; |
298 | } | |
299 | ||
300 | if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) { | |
301 | printk(KERN_DEBUG "set_cr0: #GP, set PG flag " | |
302 | "and a clear PE flag\n"); | |
c1a5d4f9 | 303 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
304 | return; |
305 | } | |
306 | ||
307 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { | |
308 | #ifdef CONFIG_X86_64 | |
ad312c7c | 309 | if ((vcpu->arch.shadow_efer & EFER_LME)) { |
a03490ed CO |
310 | int cs_db, cs_l; |
311 | ||
312 | if (!is_pae(vcpu)) { | |
313 | printk(KERN_DEBUG "set_cr0: #GP, start paging " | |
314 | "in long mode while PAE is disabled\n"); | |
c1a5d4f9 | 315 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
316 | return; |
317 | } | |
318 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
319 | if (cs_l) { | |
320 | printk(KERN_DEBUG "set_cr0: #GP, start paging " | |
321 | "in long mode while CS.L == 1\n"); | |
c1a5d4f9 | 322 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
323 | return; |
324 | ||
325 | } | |
326 | } else | |
327 | #endif | |
ad312c7c | 328 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.cr3)) { |
a03490ed CO |
329 | printk(KERN_DEBUG "set_cr0: #GP, pdptrs " |
330 | "reserved bits\n"); | |
c1a5d4f9 | 331 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
332 | return; |
333 | } | |
334 | ||
335 | } | |
336 | ||
337 | kvm_x86_ops->set_cr0(vcpu, cr0); | |
ad312c7c | 338 | vcpu->arch.cr0 = cr0; |
a03490ed | 339 | |
a03490ed | 340 | kvm_mmu_reset_context(vcpu); |
a03490ed CO |
341 | return; |
342 | } | |
2d3ad1f4 | 343 | EXPORT_SYMBOL_GPL(kvm_set_cr0); |
a03490ed | 344 | |
2d3ad1f4 | 345 | void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw) |
a03490ed | 346 | { |
2d3ad1f4 | 347 | kvm_set_cr0(vcpu, (vcpu->arch.cr0 & ~0x0ful) | (msw & 0x0f)); |
a03490ed | 348 | } |
2d3ad1f4 | 349 | EXPORT_SYMBOL_GPL(kvm_lmsw); |
a03490ed | 350 | |
2d3ad1f4 | 351 | void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
a03490ed | 352 | { |
a2edf57f AK |
353 | unsigned long old_cr4 = vcpu->arch.cr4; |
354 | unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE | X86_CR4_PAE; | |
355 | ||
a03490ed CO |
356 | if (cr4 & CR4_RESERVED_BITS) { |
357 | printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n"); | |
c1a5d4f9 | 358 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
359 | return; |
360 | } | |
361 | ||
362 | if (is_long_mode(vcpu)) { | |
363 | if (!(cr4 & X86_CR4_PAE)) { | |
364 | printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while " | |
365 | "in long mode\n"); | |
c1a5d4f9 | 366 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
367 | return; |
368 | } | |
a2edf57f AK |
369 | } else if (is_paging(vcpu) && (cr4 & X86_CR4_PAE) |
370 | && ((cr4 ^ old_cr4) & pdptr_bits) | |
ad312c7c | 371 | && !load_pdptrs(vcpu, vcpu->arch.cr3)) { |
a03490ed | 372 | printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n"); |
c1a5d4f9 | 373 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
374 | return; |
375 | } | |
376 | ||
377 | if (cr4 & X86_CR4_VMXE) { | |
378 | printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n"); | |
c1a5d4f9 | 379 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
380 | return; |
381 | } | |
382 | kvm_x86_ops->set_cr4(vcpu, cr4); | |
ad312c7c | 383 | vcpu->arch.cr4 = cr4; |
5a41accd | 384 | vcpu->arch.mmu.base_role.cr4_pge = (cr4 & X86_CR4_PGE) && !tdp_enabled; |
a03490ed | 385 | kvm_mmu_reset_context(vcpu); |
a03490ed | 386 | } |
2d3ad1f4 | 387 | EXPORT_SYMBOL_GPL(kvm_set_cr4); |
a03490ed | 388 | |
2d3ad1f4 | 389 | void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
a03490ed | 390 | { |
ad312c7c | 391 | if (cr3 == vcpu->arch.cr3 && !pdptrs_changed(vcpu)) { |
0ba73cda | 392 | kvm_mmu_sync_roots(vcpu); |
d835dfec AK |
393 | kvm_mmu_flush_tlb(vcpu); |
394 | return; | |
395 | } | |
396 | ||
a03490ed CO |
397 | if (is_long_mode(vcpu)) { |
398 | if (cr3 & CR3_L_MODE_RESERVED_BITS) { | |
399 | printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n"); | |
c1a5d4f9 | 400 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
401 | return; |
402 | } | |
403 | } else { | |
404 | if (is_pae(vcpu)) { | |
405 | if (cr3 & CR3_PAE_RESERVED_BITS) { | |
406 | printk(KERN_DEBUG | |
407 | "set_cr3: #GP, reserved bits\n"); | |
c1a5d4f9 | 408 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
409 | return; |
410 | } | |
411 | if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) { | |
412 | printk(KERN_DEBUG "set_cr3: #GP, pdptrs " | |
413 | "reserved bits\n"); | |
c1a5d4f9 | 414 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
415 | return; |
416 | } | |
417 | } | |
418 | /* | |
419 | * We don't check reserved bits in nonpae mode, because | |
420 | * this isn't enforced, and VMware depends on this. | |
421 | */ | |
422 | } | |
423 | ||
a03490ed CO |
424 | /* |
425 | * Does the new cr3 value map to physical memory? (Note, we | |
426 | * catch an invalid cr3 even in real-mode, because it would | |
427 | * cause trouble later on when we turn on paging anyway.) | |
428 | * | |
429 | * A real CPU would silently accept an invalid cr3 and would | |
430 | * attempt to use it - with largely undefined (and often hard | |
431 | * to debug) behavior on the guest side. | |
432 | */ | |
433 | if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT))) | |
c1a5d4f9 | 434 | kvm_inject_gp(vcpu, 0); |
a03490ed | 435 | else { |
ad312c7c ZX |
436 | vcpu->arch.cr3 = cr3; |
437 | vcpu->arch.mmu.new_cr3(vcpu); | |
a03490ed | 438 | } |
a03490ed | 439 | } |
2d3ad1f4 | 440 | EXPORT_SYMBOL_GPL(kvm_set_cr3); |
a03490ed | 441 | |
2d3ad1f4 | 442 | void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) |
a03490ed CO |
443 | { |
444 | if (cr8 & CR8_RESERVED_BITS) { | |
445 | printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8); | |
c1a5d4f9 | 446 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
447 | return; |
448 | } | |
449 | if (irqchip_in_kernel(vcpu->kvm)) | |
450 | kvm_lapic_set_tpr(vcpu, cr8); | |
451 | else | |
ad312c7c | 452 | vcpu->arch.cr8 = cr8; |
a03490ed | 453 | } |
2d3ad1f4 | 454 | EXPORT_SYMBOL_GPL(kvm_set_cr8); |
a03490ed | 455 | |
2d3ad1f4 | 456 | unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu) |
a03490ed CO |
457 | { |
458 | if (irqchip_in_kernel(vcpu->kvm)) | |
459 | return kvm_lapic_get_cr8(vcpu); | |
460 | else | |
ad312c7c | 461 | return vcpu->arch.cr8; |
a03490ed | 462 | } |
2d3ad1f4 | 463 | EXPORT_SYMBOL_GPL(kvm_get_cr8); |
a03490ed | 464 | |
d8017474 AG |
465 | static inline u32 bit(int bitno) |
466 | { | |
467 | return 1 << (bitno & 31); | |
468 | } | |
469 | ||
043405e1 CO |
470 | /* |
471 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS | |
472 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. | |
473 | * | |
474 | * This list is modified at module load time to reflect the | |
475 | * capabilities of the host cpu. | |
476 | */ | |
477 | static u32 msrs_to_save[] = { | |
478 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, | |
479 | MSR_K6_STAR, | |
480 | #ifdef CONFIG_X86_64 | |
481 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, | |
482 | #endif | |
af24a4e4 | 483 | MSR_IA32_TSC, MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK, |
b286d5d8 | 484 | MSR_IA32_PERF_STATUS, MSR_IA32_CR_PAT, MSR_VM_HSAVE_PA |
043405e1 CO |
485 | }; |
486 | ||
487 | static unsigned num_msrs_to_save; | |
488 | ||
489 | static u32 emulated_msrs[] = { | |
490 | MSR_IA32_MISC_ENABLE, | |
491 | }; | |
492 | ||
15c4a640 CO |
493 | static void set_efer(struct kvm_vcpu *vcpu, u64 efer) |
494 | { | |
f2b4b7dd | 495 | if (efer & efer_reserved_bits) { |
15c4a640 CO |
496 | printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n", |
497 | efer); | |
c1a5d4f9 | 498 | kvm_inject_gp(vcpu, 0); |
15c4a640 CO |
499 | return; |
500 | } | |
501 | ||
502 | if (is_paging(vcpu) | |
ad312c7c | 503 | && (vcpu->arch.shadow_efer & EFER_LME) != (efer & EFER_LME)) { |
15c4a640 | 504 | printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n"); |
c1a5d4f9 | 505 | kvm_inject_gp(vcpu, 0); |
15c4a640 CO |
506 | return; |
507 | } | |
508 | ||
1b2fd70c AG |
509 | if (efer & EFER_FFXSR) { |
510 | struct kvm_cpuid_entry2 *feat; | |
511 | ||
512 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
513 | if (!feat || !(feat->edx & bit(X86_FEATURE_FXSR_OPT))) { | |
514 | printk(KERN_DEBUG "set_efer: #GP, enable FFXSR w/o CPUID capability\n"); | |
515 | kvm_inject_gp(vcpu, 0); | |
516 | return; | |
517 | } | |
518 | } | |
519 | ||
d8017474 AG |
520 | if (efer & EFER_SVME) { |
521 | struct kvm_cpuid_entry2 *feat; | |
522 | ||
523 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
524 | if (!feat || !(feat->ecx & bit(X86_FEATURE_SVM))) { | |
525 | printk(KERN_DEBUG "set_efer: #GP, enable SVM w/o SVM\n"); | |
526 | kvm_inject_gp(vcpu, 0); | |
527 | return; | |
528 | } | |
529 | } | |
530 | ||
15c4a640 CO |
531 | kvm_x86_ops->set_efer(vcpu, efer); |
532 | ||
533 | efer &= ~EFER_LMA; | |
ad312c7c | 534 | efer |= vcpu->arch.shadow_efer & EFER_LMA; |
15c4a640 | 535 | |
ad312c7c | 536 | vcpu->arch.shadow_efer = efer; |
9645bb56 AK |
537 | |
538 | vcpu->arch.mmu.base_role.nxe = (efer & EFER_NX) && !tdp_enabled; | |
539 | kvm_mmu_reset_context(vcpu); | |
15c4a640 CO |
540 | } |
541 | ||
f2b4b7dd JR |
542 | void kvm_enable_efer_bits(u64 mask) |
543 | { | |
544 | efer_reserved_bits &= ~mask; | |
545 | } | |
546 | EXPORT_SYMBOL_GPL(kvm_enable_efer_bits); | |
547 | ||
548 | ||
15c4a640 CO |
549 | /* |
550 | * Writes msr value into into the appropriate "register". | |
551 | * Returns 0 on success, non-0 otherwise. | |
552 | * Assumes vcpu_load() was already called. | |
553 | */ | |
554 | int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) | |
555 | { | |
556 | return kvm_x86_ops->set_msr(vcpu, msr_index, data); | |
557 | } | |
558 | ||
313a3dc7 CO |
559 | /* |
560 | * Adapt set_msr() to msr_io()'s calling convention | |
561 | */ | |
562 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) | |
563 | { | |
564 | return kvm_set_msr(vcpu, index, *data); | |
565 | } | |
566 | ||
18068523 GOC |
567 | static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock) |
568 | { | |
569 | static int version; | |
50d0a0f9 GH |
570 | struct pvclock_wall_clock wc; |
571 | struct timespec now, sys, boot; | |
18068523 GOC |
572 | |
573 | if (!wall_clock) | |
574 | return; | |
575 | ||
576 | version++; | |
577 | ||
18068523 GOC |
578 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); |
579 | ||
50d0a0f9 GH |
580 | /* |
581 | * The guest calculates current wall clock time by adding | |
582 | * system time (updated by kvm_write_guest_time below) to the | |
583 | * wall clock specified here. guest system time equals host | |
584 | * system time for us, thus we must fill in host boot time here. | |
585 | */ | |
586 | now = current_kernel_time(); | |
587 | ktime_get_ts(&sys); | |
588 | boot = ns_to_timespec(timespec_to_ns(&now) - timespec_to_ns(&sys)); | |
589 | ||
590 | wc.sec = boot.tv_sec; | |
591 | wc.nsec = boot.tv_nsec; | |
592 | wc.version = version; | |
18068523 GOC |
593 | |
594 | kvm_write_guest(kvm, wall_clock, &wc, sizeof(wc)); | |
595 | ||
596 | version++; | |
597 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); | |
18068523 GOC |
598 | } |
599 | ||
50d0a0f9 GH |
600 | static uint32_t div_frac(uint32_t dividend, uint32_t divisor) |
601 | { | |
602 | uint32_t quotient, remainder; | |
603 | ||
604 | /* Don't try to replace with do_div(), this one calculates | |
605 | * "(dividend << 32) / divisor" */ | |
606 | __asm__ ( "divl %4" | |
607 | : "=a" (quotient), "=d" (remainder) | |
608 | : "0" (0), "1" (dividend), "r" (divisor) ); | |
609 | return quotient; | |
610 | } | |
611 | ||
612 | static void kvm_set_time_scale(uint32_t tsc_khz, struct pvclock_vcpu_time_info *hv_clock) | |
613 | { | |
614 | uint64_t nsecs = 1000000000LL; | |
615 | int32_t shift = 0; | |
616 | uint64_t tps64; | |
617 | uint32_t tps32; | |
618 | ||
619 | tps64 = tsc_khz * 1000LL; | |
620 | while (tps64 > nsecs*2) { | |
621 | tps64 >>= 1; | |
622 | shift--; | |
623 | } | |
624 | ||
625 | tps32 = (uint32_t)tps64; | |
626 | while (tps32 <= (uint32_t)nsecs) { | |
627 | tps32 <<= 1; | |
628 | shift++; | |
629 | } | |
630 | ||
631 | hv_clock->tsc_shift = shift; | |
632 | hv_clock->tsc_to_system_mul = div_frac(nsecs, tps32); | |
633 | ||
634 | pr_debug("%s: tsc_khz %u, tsc_shift %d, tsc_mul %u\n", | |
80a914dc | 635 | __func__, tsc_khz, hv_clock->tsc_shift, |
50d0a0f9 GH |
636 | hv_clock->tsc_to_system_mul); |
637 | } | |
638 | ||
c8076604 GH |
639 | static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz); |
640 | ||
18068523 GOC |
641 | static void kvm_write_guest_time(struct kvm_vcpu *v) |
642 | { | |
643 | struct timespec ts; | |
644 | unsigned long flags; | |
645 | struct kvm_vcpu_arch *vcpu = &v->arch; | |
646 | void *shared_kaddr; | |
463656c0 | 647 | unsigned long this_tsc_khz; |
18068523 GOC |
648 | |
649 | if ((!vcpu->time_page)) | |
650 | return; | |
651 | ||
463656c0 AK |
652 | this_tsc_khz = get_cpu_var(cpu_tsc_khz); |
653 | if (unlikely(vcpu->hv_clock_tsc_khz != this_tsc_khz)) { | |
654 | kvm_set_time_scale(this_tsc_khz, &vcpu->hv_clock); | |
655 | vcpu->hv_clock_tsc_khz = this_tsc_khz; | |
50d0a0f9 | 656 | } |
463656c0 | 657 | put_cpu_var(cpu_tsc_khz); |
50d0a0f9 | 658 | |
18068523 GOC |
659 | /* Keep irq disabled to prevent changes to the clock */ |
660 | local_irq_save(flags); | |
af24a4e4 | 661 | kvm_get_msr(v, MSR_IA32_TSC, &vcpu->hv_clock.tsc_timestamp); |
18068523 GOC |
662 | ktime_get_ts(&ts); |
663 | local_irq_restore(flags); | |
664 | ||
665 | /* With all the info we got, fill in the values */ | |
666 | ||
667 | vcpu->hv_clock.system_time = ts.tv_nsec + | |
668 | (NSEC_PER_SEC * (u64)ts.tv_sec); | |
669 | /* | |
670 | * The interface expects us to write an even number signaling that the | |
671 | * update is finished. Since the guest won't see the intermediate | |
50d0a0f9 | 672 | * state, we just increase by 2 at the end. |
18068523 | 673 | */ |
50d0a0f9 | 674 | vcpu->hv_clock.version += 2; |
18068523 GOC |
675 | |
676 | shared_kaddr = kmap_atomic(vcpu->time_page, KM_USER0); | |
677 | ||
678 | memcpy(shared_kaddr + vcpu->time_offset, &vcpu->hv_clock, | |
50d0a0f9 | 679 | sizeof(vcpu->hv_clock)); |
18068523 GOC |
680 | |
681 | kunmap_atomic(shared_kaddr, KM_USER0); | |
682 | ||
683 | mark_page_dirty(v->kvm, vcpu->time >> PAGE_SHIFT); | |
684 | } | |
685 | ||
c8076604 GH |
686 | static int kvm_request_guest_time_update(struct kvm_vcpu *v) |
687 | { | |
688 | struct kvm_vcpu_arch *vcpu = &v->arch; | |
689 | ||
690 | if (!vcpu->time_page) | |
691 | return 0; | |
692 | set_bit(KVM_REQ_KVMCLOCK_UPDATE, &v->requests); | |
693 | return 1; | |
694 | } | |
695 | ||
9ba075a6 AK |
696 | static bool msr_mtrr_valid(unsigned msr) |
697 | { | |
698 | switch (msr) { | |
699 | case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR - 1: | |
700 | case MSR_MTRRfix64K_00000: | |
701 | case MSR_MTRRfix16K_80000: | |
702 | case MSR_MTRRfix16K_A0000: | |
703 | case MSR_MTRRfix4K_C0000: | |
704 | case MSR_MTRRfix4K_C8000: | |
705 | case MSR_MTRRfix4K_D0000: | |
706 | case MSR_MTRRfix4K_D8000: | |
707 | case MSR_MTRRfix4K_E0000: | |
708 | case MSR_MTRRfix4K_E8000: | |
709 | case MSR_MTRRfix4K_F0000: | |
710 | case MSR_MTRRfix4K_F8000: | |
711 | case MSR_MTRRdefType: | |
712 | case MSR_IA32_CR_PAT: | |
713 | return true; | |
714 | case 0x2f8: | |
715 | return true; | |
716 | } | |
717 | return false; | |
718 | } | |
719 | ||
d6289b93 MT |
720 | static bool valid_pat_type(unsigned t) |
721 | { | |
722 | return t < 8 && (1 << t) & 0xf3; /* 0, 1, 4, 5, 6, 7 */ | |
723 | } | |
724 | ||
725 | static bool valid_mtrr_type(unsigned t) | |
726 | { | |
727 | return t < 8 && (1 << t) & 0x73; /* 0, 1, 4, 5, 6 */ | |
728 | } | |
729 | ||
730 | static bool mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
731 | { | |
732 | int i; | |
733 | ||
734 | if (!msr_mtrr_valid(msr)) | |
735 | return false; | |
736 | ||
737 | if (msr == MSR_IA32_CR_PAT) { | |
738 | for (i = 0; i < 8; i++) | |
739 | if (!valid_pat_type((data >> (i * 8)) & 0xff)) | |
740 | return false; | |
741 | return true; | |
742 | } else if (msr == MSR_MTRRdefType) { | |
743 | if (data & ~0xcff) | |
744 | return false; | |
745 | return valid_mtrr_type(data & 0xff); | |
746 | } else if (msr >= MSR_MTRRfix64K_00000 && msr <= MSR_MTRRfix4K_F8000) { | |
747 | for (i = 0; i < 8 ; i++) | |
748 | if (!valid_mtrr_type((data >> (i * 8)) & 0xff)) | |
749 | return false; | |
750 | return true; | |
751 | } | |
752 | ||
753 | /* variable MTRRs */ | |
754 | return valid_mtrr_type(data & 0xff); | |
755 | } | |
756 | ||
9ba075a6 AK |
757 | static int set_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
758 | { | |
0bed3b56 SY |
759 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
760 | ||
d6289b93 | 761 | if (!mtrr_valid(vcpu, msr, data)) |
9ba075a6 AK |
762 | return 1; |
763 | ||
0bed3b56 SY |
764 | if (msr == MSR_MTRRdefType) { |
765 | vcpu->arch.mtrr_state.def_type = data; | |
766 | vcpu->arch.mtrr_state.enabled = (data & 0xc00) >> 10; | |
767 | } else if (msr == MSR_MTRRfix64K_00000) | |
768 | p[0] = data; | |
769 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) | |
770 | p[1 + msr - MSR_MTRRfix16K_80000] = data; | |
771 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) | |
772 | p[3 + msr - MSR_MTRRfix4K_C0000] = data; | |
773 | else if (msr == MSR_IA32_CR_PAT) | |
774 | vcpu->arch.pat = data; | |
775 | else { /* Variable MTRRs */ | |
776 | int idx, is_mtrr_mask; | |
777 | u64 *pt; | |
778 | ||
779 | idx = (msr - 0x200) / 2; | |
780 | is_mtrr_mask = msr - 0x200 - 2 * idx; | |
781 | if (!is_mtrr_mask) | |
782 | pt = | |
783 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; | |
784 | else | |
785 | pt = | |
786 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; | |
787 | *pt = data; | |
788 | } | |
789 | ||
790 | kvm_mmu_reset_context(vcpu); | |
9ba075a6 AK |
791 | return 0; |
792 | } | |
15c4a640 | 793 | |
890ca9ae | 794 | static int set_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
15c4a640 | 795 | { |
890ca9ae HY |
796 | u64 mcg_cap = vcpu->arch.mcg_cap; |
797 | unsigned bank_num = mcg_cap & 0xff; | |
798 | ||
15c4a640 | 799 | switch (msr) { |
15c4a640 | 800 | case MSR_IA32_MCG_STATUS: |
890ca9ae | 801 | vcpu->arch.mcg_status = data; |
15c4a640 | 802 | break; |
c7ac679c | 803 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
804 | if (!(mcg_cap & MCG_CTL_P)) |
805 | return 1; | |
806 | if (data != 0 && data != ~(u64)0) | |
807 | return -1; | |
808 | vcpu->arch.mcg_ctl = data; | |
809 | break; | |
810 | default: | |
811 | if (msr >= MSR_IA32_MC0_CTL && | |
812 | msr < MSR_IA32_MC0_CTL + 4 * bank_num) { | |
813 | u32 offset = msr - MSR_IA32_MC0_CTL; | |
814 | /* only 0 or all 1s can be written to IA32_MCi_CTL */ | |
815 | if ((offset & 0x3) == 0 && | |
816 | data != 0 && data != ~(u64)0) | |
817 | return -1; | |
818 | vcpu->arch.mce_banks[offset] = data; | |
819 | break; | |
820 | } | |
821 | return 1; | |
822 | } | |
823 | return 0; | |
824 | } | |
825 | ||
826 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
827 | { | |
828 | switch (msr) { | |
829 | case MSR_EFER: | |
830 | set_efer(vcpu, data); | |
c7ac679c | 831 | break; |
8f1589d9 AP |
832 | case MSR_K7_HWCR: |
833 | data &= ~(u64)0x40; /* ignore flush filter disable */ | |
834 | if (data != 0) { | |
835 | pr_unimpl(vcpu, "unimplemented HWCR wrmsr: 0x%llx\n", | |
836 | data); | |
837 | return 1; | |
838 | } | |
839 | break; | |
f7c6d140 AP |
840 | case MSR_FAM10H_MMIO_CONF_BASE: |
841 | if (data != 0) { | |
842 | pr_unimpl(vcpu, "unimplemented MMIO_CONF_BASE wrmsr: " | |
843 | "0x%llx\n", data); | |
844 | return 1; | |
845 | } | |
846 | break; | |
c323c0e5 AP |
847 | case MSR_AMD64_NB_CFG: |
848 | break; | |
b5e2fec0 AG |
849 | case MSR_IA32_DEBUGCTLMSR: |
850 | if (!data) { | |
851 | /* We support the non-activated case already */ | |
852 | break; | |
853 | } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) { | |
854 | /* Values other than LBR and BTF are vendor-specific, | |
855 | thus reserved and should throw a #GP */ | |
856 | return 1; | |
857 | } | |
858 | pr_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n", | |
859 | __func__, data); | |
860 | break; | |
15c4a640 CO |
861 | case MSR_IA32_UCODE_REV: |
862 | case MSR_IA32_UCODE_WRITE: | |
61a6bd67 | 863 | case MSR_VM_HSAVE_PA: |
6098ca93 | 864 | case MSR_AMD64_PATCH_LOADER: |
15c4a640 | 865 | break; |
9ba075a6 AK |
866 | case 0x200 ... 0x2ff: |
867 | return set_msr_mtrr(vcpu, msr, data); | |
15c4a640 CO |
868 | case MSR_IA32_APICBASE: |
869 | kvm_set_apic_base(vcpu, data); | |
870 | break; | |
0105d1a5 GN |
871 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
872 | return kvm_x2apic_msr_write(vcpu, msr, data); | |
15c4a640 | 873 | case MSR_IA32_MISC_ENABLE: |
ad312c7c | 874 | vcpu->arch.ia32_misc_enable_msr = data; |
15c4a640 | 875 | break; |
18068523 GOC |
876 | case MSR_KVM_WALL_CLOCK: |
877 | vcpu->kvm->arch.wall_clock = data; | |
878 | kvm_write_wall_clock(vcpu->kvm, data); | |
879 | break; | |
880 | case MSR_KVM_SYSTEM_TIME: { | |
881 | if (vcpu->arch.time_page) { | |
882 | kvm_release_page_dirty(vcpu->arch.time_page); | |
883 | vcpu->arch.time_page = NULL; | |
884 | } | |
885 | ||
886 | vcpu->arch.time = data; | |
887 | ||
888 | /* we verify if the enable bit is set... */ | |
889 | if (!(data & 1)) | |
890 | break; | |
891 | ||
892 | /* ...but clean it before doing the actual write */ | |
893 | vcpu->arch.time_offset = data & ~(PAGE_MASK | 1); | |
894 | ||
18068523 GOC |
895 | vcpu->arch.time_page = |
896 | gfn_to_page(vcpu->kvm, data >> PAGE_SHIFT); | |
18068523 GOC |
897 | |
898 | if (is_error_page(vcpu->arch.time_page)) { | |
899 | kvm_release_page_clean(vcpu->arch.time_page); | |
900 | vcpu->arch.time_page = NULL; | |
901 | } | |
902 | ||
c8076604 | 903 | kvm_request_guest_time_update(vcpu); |
18068523 GOC |
904 | break; |
905 | } | |
890ca9ae HY |
906 | case MSR_IA32_MCG_CTL: |
907 | case MSR_IA32_MCG_STATUS: | |
908 | case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1: | |
909 | return set_msr_mce(vcpu, msr, data); | |
71db6023 AP |
910 | |
911 | /* Performance counters are not protected by a CPUID bit, | |
912 | * so we should check all of them in the generic path for the sake of | |
913 | * cross vendor migration. | |
914 | * Writing a zero into the event select MSRs disables them, | |
915 | * which we perfectly emulate ;-). Any other value should be at least | |
916 | * reported, some guests depend on them. | |
917 | */ | |
918 | case MSR_P6_EVNTSEL0: | |
919 | case MSR_P6_EVNTSEL1: | |
920 | case MSR_K7_EVNTSEL0: | |
921 | case MSR_K7_EVNTSEL1: | |
922 | case MSR_K7_EVNTSEL2: | |
923 | case MSR_K7_EVNTSEL3: | |
924 | if (data != 0) | |
925 | pr_unimpl(vcpu, "unimplemented perfctr wrmsr: " | |
926 | "0x%x data 0x%llx\n", msr, data); | |
927 | break; | |
928 | /* at least RHEL 4 unconditionally writes to the perfctr registers, | |
929 | * so we ignore writes to make it happy. | |
930 | */ | |
931 | case MSR_P6_PERFCTR0: | |
932 | case MSR_P6_PERFCTR1: | |
933 | case MSR_K7_PERFCTR0: | |
934 | case MSR_K7_PERFCTR1: | |
935 | case MSR_K7_PERFCTR2: | |
936 | case MSR_K7_PERFCTR3: | |
937 | pr_unimpl(vcpu, "unimplemented perfctr wrmsr: " | |
938 | "0x%x data 0x%llx\n", msr, data); | |
939 | break; | |
15c4a640 | 940 | default: |
ed85c068 AP |
941 | if (!ignore_msrs) { |
942 | pr_unimpl(vcpu, "unhandled wrmsr: 0x%x data %llx\n", | |
943 | msr, data); | |
944 | return 1; | |
945 | } else { | |
946 | pr_unimpl(vcpu, "ignored wrmsr: 0x%x data %llx\n", | |
947 | msr, data); | |
948 | break; | |
949 | } | |
15c4a640 CO |
950 | } |
951 | return 0; | |
952 | } | |
953 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); | |
954 | ||
955 | ||
956 | /* | |
957 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
958 | * Returns 0 on success, non-0 otherwise. | |
959 | * Assumes vcpu_load() was already called. | |
960 | */ | |
961 | int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) | |
962 | { | |
963 | return kvm_x86_ops->get_msr(vcpu, msr_index, pdata); | |
964 | } | |
965 | ||
9ba075a6 AK |
966 | static int get_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
967 | { | |
0bed3b56 SY |
968 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
969 | ||
9ba075a6 AK |
970 | if (!msr_mtrr_valid(msr)) |
971 | return 1; | |
972 | ||
0bed3b56 SY |
973 | if (msr == MSR_MTRRdefType) |
974 | *pdata = vcpu->arch.mtrr_state.def_type + | |
975 | (vcpu->arch.mtrr_state.enabled << 10); | |
976 | else if (msr == MSR_MTRRfix64K_00000) | |
977 | *pdata = p[0]; | |
978 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) | |
979 | *pdata = p[1 + msr - MSR_MTRRfix16K_80000]; | |
980 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) | |
981 | *pdata = p[3 + msr - MSR_MTRRfix4K_C0000]; | |
982 | else if (msr == MSR_IA32_CR_PAT) | |
983 | *pdata = vcpu->arch.pat; | |
984 | else { /* Variable MTRRs */ | |
985 | int idx, is_mtrr_mask; | |
986 | u64 *pt; | |
987 | ||
988 | idx = (msr - 0x200) / 2; | |
989 | is_mtrr_mask = msr - 0x200 - 2 * idx; | |
990 | if (!is_mtrr_mask) | |
991 | pt = | |
992 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; | |
993 | else | |
994 | pt = | |
995 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; | |
996 | *pdata = *pt; | |
997 | } | |
998 | ||
9ba075a6 AK |
999 | return 0; |
1000 | } | |
1001 | ||
890ca9ae | 1002 | static int get_msr_mce(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
15c4a640 CO |
1003 | { |
1004 | u64 data; | |
890ca9ae HY |
1005 | u64 mcg_cap = vcpu->arch.mcg_cap; |
1006 | unsigned bank_num = mcg_cap & 0xff; | |
15c4a640 CO |
1007 | |
1008 | switch (msr) { | |
15c4a640 CO |
1009 | case MSR_IA32_P5_MC_ADDR: |
1010 | case MSR_IA32_P5_MC_TYPE: | |
890ca9ae HY |
1011 | data = 0; |
1012 | break; | |
15c4a640 | 1013 | case MSR_IA32_MCG_CAP: |
890ca9ae HY |
1014 | data = vcpu->arch.mcg_cap; |
1015 | break; | |
c7ac679c | 1016 | case MSR_IA32_MCG_CTL: |
890ca9ae HY |
1017 | if (!(mcg_cap & MCG_CTL_P)) |
1018 | return 1; | |
1019 | data = vcpu->arch.mcg_ctl; | |
1020 | break; | |
1021 | case MSR_IA32_MCG_STATUS: | |
1022 | data = vcpu->arch.mcg_status; | |
1023 | break; | |
1024 | default: | |
1025 | if (msr >= MSR_IA32_MC0_CTL && | |
1026 | msr < MSR_IA32_MC0_CTL + 4 * bank_num) { | |
1027 | u32 offset = msr - MSR_IA32_MC0_CTL; | |
1028 | data = vcpu->arch.mce_banks[offset]; | |
1029 | break; | |
1030 | } | |
1031 | return 1; | |
1032 | } | |
1033 | *pdata = data; | |
1034 | return 0; | |
1035 | } | |
1036 | ||
1037 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) | |
1038 | { | |
1039 | u64 data; | |
1040 | ||
1041 | switch (msr) { | |
890ca9ae | 1042 | case MSR_IA32_PLATFORM_ID: |
15c4a640 | 1043 | case MSR_IA32_UCODE_REV: |
15c4a640 | 1044 | case MSR_IA32_EBL_CR_POWERON: |
b5e2fec0 AG |
1045 | case MSR_IA32_DEBUGCTLMSR: |
1046 | case MSR_IA32_LASTBRANCHFROMIP: | |
1047 | case MSR_IA32_LASTBRANCHTOIP: | |
1048 | case MSR_IA32_LASTINTFROMIP: | |
1049 | case MSR_IA32_LASTINTTOIP: | |
60af2ecd JSR |
1050 | case MSR_K8_SYSCFG: |
1051 | case MSR_K7_HWCR: | |
61a6bd67 | 1052 | case MSR_VM_HSAVE_PA: |
7fe29e0f AS |
1053 | case MSR_P6_EVNTSEL0: |
1054 | case MSR_P6_EVNTSEL1: | |
9e699624 | 1055 | case MSR_K7_EVNTSEL0: |
1fdbd48c | 1056 | case MSR_K8_INT_PENDING_MSG: |
c323c0e5 | 1057 | case MSR_AMD64_NB_CFG: |
f7c6d140 | 1058 | case MSR_FAM10H_MMIO_CONF_BASE: |
15c4a640 CO |
1059 | data = 0; |
1060 | break; | |
9ba075a6 AK |
1061 | case MSR_MTRRcap: |
1062 | data = 0x500 | KVM_NR_VAR_MTRR; | |
1063 | break; | |
1064 | case 0x200 ... 0x2ff: | |
1065 | return get_msr_mtrr(vcpu, msr, pdata); | |
15c4a640 CO |
1066 | case 0xcd: /* fsb frequency */ |
1067 | data = 3; | |
1068 | break; | |
1069 | case MSR_IA32_APICBASE: | |
1070 | data = kvm_get_apic_base(vcpu); | |
1071 | break; | |
0105d1a5 GN |
1072 | case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff: |
1073 | return kvm_x2apic_msr_read(vcpu, msr, pdata); | |
1074 | break; | |
15c4a640 | 1075 | case MSR_IA32_MISC_ENABLE: |
ad312c7c | 1076 | data = vcpu->arch.ia32_misc_enable_msr; |
15c4a640 | 1077 | break; |
847f0ad8 AG |
1078 | case MSR_IA32_PERF_STATUS: |
1079 | /* TSC increment by tick */ | |
1080 | data = 1000ULL; | |
1081 | /* CPU multiplier */ | |
1082 | data |= (((uint64_t)4ULL) << 40); | |
1083 | break; | |
15c4a640 | 1084 | case MSR_EFER: |
ad312c7c | 1085 | data = vcpu->arch.shadow_efer; |
15c4a640 | 1086 | break; |
18068523 GOC |
1087 | case MSR_KVM_WALL_CLOCK: |
1088 | data = vcpu->kvm->arch.wall_clock; | |
1089 | break; | |
1090 | case MSR_KVM_SYSTEM_TIME: | |
1091 | data = vcpu->arch.time; | |
1092 | break; | |
890ca9ae HY |
1093 | case MSR_IA32_P5_MC_ADDR: |
1094 | case MSR_IA32_P5_MC_TYPE: | |
1095 | case MSR_IA32_MCG_CAP: | |
1096 | case MSR_IA32_MCG_CTL: | |
1097 | case MSR_IA32_MCG_STATUS: | |
1098 | case MSR_IA32_MC0_CTL ... MSR_IA32_MC0_CTL + 4 * KVM_MAX_MCE_BANKS - 1: | |
1099 | return get_msr_mce(vcpu, msr, pdata); | |
15c4a640 | 1100 | default: |
ed85c068 AP |
1101 | if (!ignore_msrs) { |
1102 | pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr); | |
1103 | return 1; | |
1104 | } else { | |
1105 | pr_unimpl(vcpu, "ignored rdmsr: 0x%x\n", msr); | |
1106 | data = 0; | |
1107 | } | |
1108 | break; | |
15c4a640 CO |
1109 | } |
1110 | *pdata = data; | |
1111 | return 0; | |
1112 | } | |
1113 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); | |
1114 | ||
313a3dc7 CO |
1115 | /* |
1116 | * Read or write a bunch of msrs. All parameters are kernel addresses. | |
1117 | * | |
1118 | * @return number of msrs set successfully. | |
1119 | */ | |
1120 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, | |
1121 | struct kvm_msr_entry *entries, | |
1122 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
1123 | unsigned index, u64 *data)) | |
1124 | { | |
1125 | int i; | |
1126 | ||
1127 | vcpu_load(vcpu); | |
1128 | ||
3200f405 | 1129 | down_read(&vcpu->kvm->slots_lock); |
313a3dc7 CO |
1130 | for (i = 0; i < msrs->nmsrs; ++i) |
1131 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) | |
1132 | break; | |
3200f405 | 1133 | up_read(&vcpu->kvm->slots_lock); |
313a3dc7 CO |
1134 | |
1135 | vcpu_put(vcpu); | |
1136 | ||
1137 | return i; | |
1138 | } | |
1139 | ||
1140 | /* | |
1141 | * Read or write a bunch of msrs. Parameters are user addresses. | |
1142 | * | |
1143 | * @return number of msrs set successfully. | |
1144 | */ | |
1145 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, | |
1146 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
1147 | unsigned index, u64 *data), | |
1148 | int writeback) | |
1149 | { | |
1150 | struct kvm_msrs msrs; | |
1151 | struct kvm_msr_entry *entries; | |
1152 | int r, n; | |
1153 | unsigned size; | |
1154 | ||
1155 | r = -EFAULT; | |
1156 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) | |
1157 | goto out; | |
1158 | ||
1159 | r = -E2BIG; | |
1160 | if (msrs.nmsrs >= MAX_IO_MSRS) | |
1161 | goto out; | |
1162 | ||
1163 | r = -ENOMEM; | |
1164 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; | |
1165 | entries = vmalloc(size); | |
1166 | if (!entries) | |
1167 | goto out; | |
1168 | ||
1169 | r = -EFAULT; | |
1170 | if (copy_from_user(entries, user_msrs->entries, size)) | |
1171 | goto out_free; | |
1172 | ||
1173 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); | |
1174 | if (r < 0) | |
1175 | goto out_free; | |
1176 | ||
1177 | r = -EFAULT; | |
1178 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) | |
1179 | goto out_free; | |
1180 | ||
1181 | r = n; | |
1182 | ||
1183 | out_free: | |
1184 | vfree(entries); | |
1185 | out: | |
1186 | return r; | |
1187 | } | |
1188 | ||
018d00d2 ZX |
1189 | int kvm_dev_ioctl_check_extension(long ext) |
1190 | { | |
1191 | int r; | |
1192 | ||
1193 | switch (ext) { | |
1194 | case KVM_CAP_IRQCHIP: | |
1195 | case KVM_CAP_HLT: | |
1196 | case KVM_CAP_MMU_SHADOW_CACHE_CONTROL: | |
018d00d2 | 1197 | case KVM_CAP_SET_TSS_ADDR: |
07716717 | 1198 | case KVM_CAP_EXT_CPUID: |
c8076604 | 1199 | case KVM_CAP_CLOCKSOURCE: |
7837699f | 1200 | case KVM_CAP_PIT: |
a28e4f5a | 1201 | case KVM_CAP_NOP_IO_DELAY: |
62d9f0db | 1202 | case KVM_CAP_MP_STATE: |
ed848624 | 1203 | case KVM_CAP_SYNC_MMU: |
52d939a0 | 1204 | case KVM_CAP_REINJECT_CONTROL: |
4925663a | 1205 | case KVM_CAP_IRQ_INJECT_STATUS: |
e56d532f | 1206 | case KVM_CAP_ASSIGN_DEV_IRQ: |
721eecbf | 1207 | case KVM_CAP_IRQFD: |
d34e6b17 | 1208 | case KVM_CAP_IOEVENTFD: |
c5ff41ce | 1209 | case KVM_CAP_PIT2: |
e9f42757 | 1210 | case KVM_CAP_PIT_STATE2: |
018d00d2 ZX |
1211 | r = 1; |
1212 | break; | |
542472b5 LV |
1213 | case KVM_CAP_COALESCED_MMIO: |
1214 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; | |
1215 | break; | |
774ead3a AK |
1216 | case KVM_CAP_VAPIC: |
1217 | r = !kvm_x86_ops->cpu_has_accelerated_tpr(); | |
1218 | break; | |
f725230a AK |
1219 | case KVM_CAP_NR_VCPUS: |
1220 | r = KVM_MAX_VCPUS; | |
1221 | break; | |
a988b910 AK |
1222 | case KVM_CAP_NR_MEMSLOTS: |
1223 | r = KVM_MEMORY_SLOTS; | |
1224 | break; | |
2f333bcb MT |
1225 | case KVM_CAP_PV_MMU: |
1226 | r = !tdp_enabled; | |
1227 | break; | |
62c476c7 | 1228 | case KVM_CAP_IOMMU: |
19de40a8 | 1229 | r = iommu_found(); |
62c476c7 | 1230 | break; |
890ca9ae HY |
1231 | case KVM_CAP_MCE: |
1232 | r = KVM_MAX_MCE_BANKS; | |
1233 | break; | |
018d00d2 ZX |
1234 | default: |
1235 | r = 0; | |
1236 | break; | |
1237 | } | |
1238 | return r; | |
1239 | ||
1240 | } | |
1241 | ||
043405e1 CO |
1242 | long kvm_arch_dev_ioctl(struct file *filp, |
1243 | unsigned int ioctl, unsigned long arg) | |
1244 | { | |
1245 | void __user *argp = (void __user *)arg; | |
1246 | long r; | |
1247 | ||
1248 | switch (ioctl) { | |
1249 | case KVM_GET_MSR_INDEX_LIST: { | |
1250 | struct kvm_msr_list __user *user_msr_list = argp; | |
1251 | struct kvm_msr_list msr_list; | |
1252 | unsigned n; | |
1253 | ||
1254 | r = -EFAULT; | |
1255 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) | |
1256 | goto out; | |
1257 | n = msr_list.nmsrs; | |
1258 | msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs); | |
1259 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) | |
1260 | goto out; | |
1261 | r = -E2BIG; | |
e125e7b6 | 1262 | if (n < msr_list.nmsrs) |
043405e1 CO |
1263 | goto out; |
1264 | r = -EFAULT; | |
1265 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, | |
1266 | num_msrs_to_save * sizeof(u32))) | |
1267 | goto out; | |
e125e7b6 | 1268 | if (copy_to_user(user_msr_list->indices + num_msrs_to_save, |
043405e1 CO |
1269 | &emulated_msrs, |
1270 | ARRAY_SIZE(emulated_msrs) * sizeof(u32))) | |
1271 | goto out; | |
1272 | r = 0; | |
1273 | break; | |
1274 | } | |
674eea0f AK |
1275 | case KVM_GET_SUPPORTED_CPUID: { |
1276 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
1277 | struct kvm_cpuid2 cpuid; | |
1278 | ||
1279 | r = -EFAULT; | |
1280 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
1281 | goto out; | |
1282 | r = kvm_dev_ioctl_get_supported_cpuid(&cpuid, | |
19355475 | 1283 | cpuid_arg->entries); |
674eea0f AK |
1284 | if (r) |
1285 | goto out; | |
1286 | ||
1287 | r = -EFAULT; | |
1288 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
1289 | goto out; | |
1290 | r = 0; | |
1291 | break; | |
1292 | } | |
890ca9ae HY |
1293 | case KVM_X86_GET_MCE_CAP_SUPPORTED: { |
1294 | u64 mce_cap; | |
1295 | ||
1296 | mce_cap = KVM_MCE_CAP_SUPPORTED; | |
1297 | r = -EFAULT; | |
1298 | if (copy_to_user(argp, &mce_cap, sizeof mce_cap)) | |
1299 | goto out; | |
1300 | r = 0; | |
1301 | break; | |
1302 | } | |
043405e1 CO |
1303 | default: |
1304 | r = -EINVAL; | |
1305 | } | |
1306 | out: | |
1307 | return r; | |
1308 | } | |
1309 | ||
313a3dc7 CO |
1310 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
1311 | { | |
1312 | kvm_x86_ops->vcpu_load(vcpu, cpu); | |
c8076604 | 1313 | kvm_request_guest_time_update(vcpu); |
313a3dc7 CO |
1314 | } |
1315 | ||
1316 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
1317 | { | |
1318 | kvm_x86_ops->vcpu_put(vcpu); | |
9327fd11 | 1319 | kvm_put_guest_fpu(vcpu); |
313a3dc7 CO |
1320 | } |
1321 | ||
07716717 | 1322 | static int is_efer_nx(void) |
313a3dc7 | 1323 | { |
e286e86e | 1324 | unsigned long long efer = 0; |
313a3dc7 | 1325 | |
e286e86e | 1326 | rdmsrl_safe(MSR_EFER, &efer); |
07716717 DK |
1327 | return efer & EFER_NX; |
1328 | } | |
1329 | ||
1330 | static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu) | |
1331 | { | |
1332 | int i; | |
1333 | struct kvm_cpuid_entry2 *e, *entry; | |
1334 | ||
313a3dc7 | 1335 | entry = NULL; |
ad312c7c ZX |
1336 | for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { |
1337 | e = &vcpu->arch.cpuid_entries[i]; | |
313a3dc7 CO |
1338 | if (e->function == 0x80000001) { |
1339 | entry = e; | |
1340 | break; | |
1341 | } | |
1342 | } | |
07716717 | 1343 | if (entry && (entry->edx & (1 << 20)) && !is_efer_nx()) { |
313a3dc7 CO |
1344 | entry->edx &= ~(1 << 20); |
1345 | printk(KERN_INFO "kvm: guest NX capability removed\n"); | |
1346 | } | |
1347 | } | |
1348 | ||
07716717 | 1349 | /* when an old userspace process fills a new kernel module */ |
313a3dc7 CO |
1350 | static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu, |
1351 | struct kvm_cpuid *cpuid, | |
1352 | struct kvm_cpuid_entry __user *entries) | |
07716717 DK |
1353 | { |
1354 | int r, i; | |
1355 | struct kvm_cpuid_entry *cpuid_entries; | |
1356 | ||
1357 | r = -E2BIG; | |
1358 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
1359 | goto out; | |
1360 | r = -ENOMEM; | |
1361 | cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry) * cpuid->nent); | |
1362 | if (!cpuid_entries) | |
1363 | goto out; | |
1364 | r = -EFAULT; | |
1365 | if (copy_from_user(cpuid_entries, entries, | |
1366 | cpuid->nent * sizeof(struct kvm_cpuid_entry))) | |
1367 | goto out_free; | |
1368 | for (i = 0; i < cpuid->nent; i++) { | |
ad312c7c ZX |
1369 | vcpu->arch.cpuid_entries[i].function = cpuid_entries[i].function; |
1370 | vcpu->arch.cpuid_entries[i].eax = cpuid_entries[i].eax; | |
1371 | vcpu->arch.cpuid_entries[i].ebx = cpuid_entries[i].ebx; | |
1372 | vcpu->arch.cpuid_entries[i].ecx = cpuid_entries[i].ecx; | |
1373 | vcpu->arch.cpuid_entries[i].edx = cpuid_entries[i].edx; | |
1374 | vcpu->arch.cpuid_entries[i].index = 0; | |
1375 | vcpu->arch.cpuid_entries[i].flags = 0; | |
1376 | vcpu->arch.cpuid_entries[i].padding[0] = 0; | |
1377 | vcpu->arch.cpuid_entries[i].padding[1] = 0; | |
1378 | vcpu->arch.cpuid_entries[i].padding[2] = 0; | |
1379 | } | |
1380 | vcpu->arch.cpuid_nent = cpuid->nent; | |
07716717 DK |
1381 | cpuid_fix_nx_cap(vcpu); |
1382 | r = 0; | |
fc61b800 | 1383 | kvm_apic_set_version(vcpu); |
07716717 DK |
1384 | |
1385 | out_free: | |
1386 | vfree(cpuid_entries); | |
1387 | out: | |
1388 | return r; | |
1389 | } | |
1390 | ||
1391 | static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu, | |
19355475 AS |
1392 | struct kvm_cpuid2 *cpuid, |
1393 | struct kvm_cpuid_entry2 __user *entries) | |
313a3dc7 CO |
1394 | { |
1395 | int r; | |
1396 | ||
1397 | r = -E2BIG; | |
1398 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
1399 | goto out; | |
1400 | r = -EFAULT; | |
ad312c7c | 1401 | if (copy_from_user(&vcpu->arch.cpuid_entries, entries, |
07716717 | 1402 | cpuid->nent * sizeof(struct kvm_cpuid_entry2))) |
313a3dc7 | 1403 | goto out; |
ad312c7c | 1404 | vcpu->arch.cpuid_nent = cpuid->nent; |
fc61b800 | 1405 | kvm_apic_set_version(vcpu); |
313a3dc7 CO |
1406 | return 0; |
1407 | ||
1408 | out: | |
1409 | return r; | |
1410 | } | |
1411 | ||
07716717 | 1412 | static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu, |
19355475 AS |
1413 | struct kvm_cpuid2 *cpuid, |
1414 | struct kvm_cpuid_entry2 __user *entries) | |
07716717 DK |
1415 | { |
1416 | int r; | |
1417 | ||
1418 | r = -E2BIG; | |
ad312c7c | 1419 | if (cpuid->nent < vcpu->arch.cpuid_nent) |
07716717 DK |
1420 | goto out; |
1421 | r = -EFAULT; | |
ad312c7c | 1422 | if (copy_to_user(entries, &vcpu->arch.cpuid_entries, |
19355475 | 1423 | vcpu->arch.cpuid_nent * sizeof(struct kvm_cpuid_entry2))) |
07716717 DK |
1424 | goto out; |
1425 | return 0; | |
1426 | ||
1427 | out: | |
ad312c7c | 1428 | cpuid->nent = vcpu->arch.cpuid_nent; |
07716717 DK |
1429 | return r; |
1430 | } | |
1431 | ||
07716717 | 1432 | static void do_cpuid_1_ent(struct kvm_cpuid_entry2 *entry, u32 function, |
19355475 | 1433 | u32 index) |
07716717 DK |
1434 | { |
1435 | entry->function = function; | |
1436 | entry->index = index; | |
1437 | cpuid_count(entry->function, entry->index, | |
19355475 | 1438 | &entry->eax, &entry->ebx, &entry->ecx, &entry->edx); |
07716717 DK |
1439 | entry->flags = 0; |
1440 | } | |
1441 | ||
7faa4ee1 AK |
1442 | #define F(x) bit(X86_FEATURE_##x) |
1443 | ||
07716717 DK |
1444 | static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, |
1445 | u32 index, int *nent, int maxnent) | |
1446 | { | |
7faa4ee1 | 1447 | unsigned f_nx = is_efer_nx() ? F(NX) : 0; |
07716717 | 1448 | #ifdef CONFIG_X86_64 |
7faa4ee1 AK |
1449 | unsigned f_lm = F(LM); |
1450 | #else | |
1451 | unsigned f_lm = 0; | |
07716717 | 1452 | #endif |
7faa4ee1 AK |
1453 | |
1454 | /* cpuid 1.edx */ | |
1455 | const u32 kvm_supported_word0_x86_features = | |
1456 | F(FPU) | F(VME) | F(DE) | F(PSE) | | |
1457 | F(TSC) | F(MSR) | F(PAE) | F(MCE) | | |
1458 | F(CX8) | F(APIC) | 0 /* Reserved */ | F(SEP) | | |
1459 | F(MTRR) | F(PGE) | F(MCA) | F(CMOV) | | |
1460 | F(PAT) | F(PSE36) | 0 /* PSN */ | F(CLFLSH) | | |
1461 | 0 /* Reserved, DS, ACPI */ | F(MMX) | | |
1462 | F(FXSR) | F(XMM) | F(XMM2) | F(SELFSNOOP) | | |
1463 | 0 /* HTT, TM, Reserved, PBE */; | |
1464 | /* cpuid 0x80000001.edx */ | |
1465 | const u32 kvm_supported_word1_x86_features = | |
1466 | F(FPU) | F(VME) | F(DE) | F(PSE) | | |
1467 | F(TSC) | F(MSR) | F(PAE) | F(MCE) | | |
1468 | F(CX8) | F(APIC) | 0 /* Reserved */ | F(SYSCALL) | | |
1469 | F(MTRR) | F(PGE) | F(MCA) | F(CMOV) | | |
1470 | F(PAT) | F(PSE36) | 0 /* Reserved */ | | |
1471 | f_nx | 0 /* Reserved */ | F(MMXEXT) | F(MMX) | | |
1472 | F(FXSR) | F(FXSR_OPT) | 0 /* GBPAGES */ | 0 /* RDTSCP */ | | |
1473 | 0 /* Reserved */ | f_lm | F(3DNOWEXT) | F(3DNOW); | |
1474 | /* cpuid 1.ecx */ | |
1475 | const u32 kvm_supported_word4_x86_features = | |
d149c731 AK |
1476 | F(XMM3) | 0 /* Reserved, DTES64, MONITOR */ | |
1477 | 0 /* DS-CPL, VMX, SMX, EST */ | | |
1478 | 0 /* TM2 */ | F(SSSE3) | 0 /* CNXT-ID */ | 0 /* Reserved */ | | |
1479 | 0 /* Reserved */ | F(CX16) | 0 /* xTPR Update, PDCM */ | | |
1480 | 0 /* Reserved, DCA */ | F(XMM4_1) | | |
0105d1a5 | 1481 | F(XMM4_2) | F(X2APIC) | F(MOVBE) | F(POPCNT) | |
d149c731 | 1482 | 0 /* Reserved, XSAVE, OSXSAVE */; |
7faa4ee1 | 1483 | /* cpuid 0x80000001.ecx */ |
07716717 | 1484 | const u32 kvm_supported_word6_x86_features = |
7faa4ee1 AK |
1485 | F(LAHF_LM) | F(CMP_LEGACY) | F(SVM) | 0 /* ExtApicSpace */ | |
1486 | F(CR8_LEGACY) | F(ABM) | F(SSE4A) | F(MISALIGNSSE) | | |
1487 | F(3DNOWPREFETCH) | 0 /* OSVW */ | 0 /* IBS */ | F(SSE5) | | |
1488 | 0 /* SKINIT */ | 0 /* WDT */; | |
07716717 | 1489 | |
19355475 | 1490 | /* all calls to cpuid_count() should be made on the same cpu */ |
07716717 DK |
1491 | get_cpu(); |
1492 | do_cpuid_1_ent(entry, function, index); | |
1493 | ++*nent; | |
1494 | ||
1495 | switch (function) { | |
1496 | case 0: | |
1497 | entry->eax = min(entry->eax, (u32)0xb); | |
1498 | break; | |
1499 | case 1: | |
1500 | entry->edx &= kvm_supported_word0_x86_features; | |
7faa4ee1 | 1501 | entry->ecx &= kvm_supported_word4_x86_features; |
0d1de2d9 GN |
1502 | /* we support x2apic emulation even if host does not support |
1503 | * it since we emulate x2apic in software */ | |
1504 | entry->ecx |= F(X2APIC); | |
07716717 DK |
1505 | break; |
1506 | /* function 2 entries are STATEFUL. That is, repeated cpuid commands | |
1507 | * may return different values. This forces us to get_cpu() before | |
1508 | * issuing the first command, and also to emulate this annoying behavior | |
1509 | * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */ | |
1510 | case 2: { | |
1511 | int t, times = entry->eax & 0xff; | |
1512 | ||
1513 | entry->flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; | |
0fdf8e59 | 1514 | entry->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT; |
07716717 DK |
1515 | for (t = 1; t < times && *nent < maxnent; ++t) { |
1516 | do_cpuid_1_ent(&entry[t], function, 0); | |
1517 | entry[t].flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; | |
1518 | ++*nent; | |
1519 | } | |
1520 | break; | |
1521 | } | |
1522 | /* function 4 and 0xb have additional index. */ | |
1523 | case 4: { | |
14af3f3c | 1524 | int i, cache_type; |
07716717 DK |
1525 | |
1526 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
1527 | /* read more entries until cache_type is zero */ | |
14af3f3c HH |
1528 | for (i = 1; *nent < maxnent; ++i) { |
1529 | cache_type = entry[i - 1].eax & 0x1f; | |
07716717 DK |
1530 | if (!cache_type) |
1531 | break; | |
14af3f3c HH |
1532 | do_cpuid_1_ent(&entry[i], function, i); |
1533 | entry[i].flags |= | |
07716717 DK |
1534 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
1535 | ++*nent; | |
1536 | } | |
1537 | break; | |
1538 | } | |
1539 | case 0xb: { | |
14af3f3c | 1540 | int i, level_type; |
07716717 DK |
1541 | |
1542 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
1543 | /* read more entries until level_type is zero */ | |
14af3f3c | 1544 | for (i = 1; *nent < maxnent; ++i) { |
0853d2c1 | 1545 | level_type = entry[i - 1].ecx & 0xff00; |
07716717 DK |
1546 | if (!level_type) |
1547 | break; | |
14af3f3c HH |
1548 | do_cpuid_1_ent(&entry[i], function, i); |
1549 | entry[i].flags |= | |
07716717 DK |
1550 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
1551 | ++*nent; | |
1552 | } | |
1553 | break; | |
1554 | } | |
1555 | case 0x80000000: | |
1556 | entry->eax = min(entry->eax, 0x8000001a); | |
1557 | break; | |
1558 | case 0x80000001: | |
1559 | entry->edx &= kvm_supported_word1_x86_features; | |
1560 | entry->ecx &= kvm_supported_word6_x86_features; | |
1561 | break; | |
1562 | } | |
1563 | put_cpu(); | |
1564 | } | |
1565 | ||
7faa4ee1 AK |
1566 | #undef F |
1567 | ||
674eea0f | 1568 | static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, |
19355475 | 1569 | struct kvm_cpuid_entry2 __user *entries) |
07716717 DK |
1570 | { |
1571 | struct kvm_cpuid_entry2 *cpuid_entries; | |
1572 | int limit, nent = 0, r = -E2BIG; | |
1573 | u32 func; | |
1574 | ||
1575 | if (cpuid->nent < 1) | |
1576 | goto out; | |
1577 | r = -ENOMEM; | |
1578 | cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry2) * cpuid->nent); | |
1579 | if (!cpuid_entries) | |
1580 | goto out; | |
1581 | ||
1582 | do_cpuid_ent(&cpuid_entries[0], 0, 0, &nent, cpuid->nent); | |
1583 | limit = cpuid_entries[0].eax; | |
1584 | for (func = 1; func <= limit && nent < cpuid->nent; ++func) | |
1585 | do_cpuid_ent(&cpuid_entries[nent], func, 0, | |
19355475 | 1586 | &nent, cpuid->nent); |
07716717 DK |
1587 | r = -E2BIG; |
1588 | if (nent >= cpuid->nent) | |
1589 | goto out_free; | |
1590 | ||
1591 | do_cpuid_ent(&cpuid_entries[nent], 0x80000000, 0, &nent, cpuid->nent); | |
1592 | limit = cpuid_entries[nent - 1].eax; | |
1593 | for (func = 0x80000001; func <= limit && nent < cpuid->nent; ++func) | |
1594 | do_cpuid_ent(&cpuid_entries[nent], func, 0, | |
19355475 | 1595 | &nent, cpuid->nent); |
cb007648 MM |
1596 | r = -E2BIG; |
1597 | if (nent >= cpuid->nent) | |
1598 | goto out_free; | |
1599 | ||
07716717 DK |
1600 | r = -EFAULT; |
1601 | if (copy_to_user(entries, cpuid_entries, | |
19355475 | 1602 | nent * sizeof(struct kvm_cpuid_entry2))) |
07716717 DK |
1603 | goto out_free; |
1604 | cpuid->nent = nent; | |
1605 | r = 0; | |
1606 | ||
1607 | out_free: | |
1608 | vfree(cpuid_entries); | |
1609 | out: | |
1610 | return r; | |
1611 | } | |
1612 | ||
313a3dc7 CO |
1613 | static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu, |
1614 | struct kvm_lapic_state *s) | |
1615 | { | |
1616 | vcpu_load(vcpu); | |
ad312c7c | 1617 | memcpy(s->regs, vcpu->arch.apic->regs, sizeof *s); |
313a3dc7 CO |
1618 | vcpu_put(vcpu); |
1619 | ||
1620 | return 0; | |
1621 | } | |
1622 | ||
1623 | static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu, | |
1624 | struct kvm_lapic_state *s) | |
1625 | { | |
1626 | vcpu_load(vcpu); | |
ad312c7c | 1627 | memcpy(vcpu->arch.apic->regs, s->regs, sizeof *s); |
313a3dc7 CO |
1628 | kvm_apic_post_state_restore(vcpu); |
1629 | vcpu_put(vcpu); | |
1630 | ||
1631 | return 0; | |
1632 | } | |
1633 | ||
f77bc6a4 ZX |
1634 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
1635 | struct kvm_interrupt *irq) | |
1636 | { | |
1637 | if (irq->irq < 0 || irq->irq >= 256) | |
1638 | return -EINVAL; | |
1639 | if (irqchip_in_kernel(vcpu->kvm)) | |
1640 | return -ENXIO; | |
1641 | vcpu_load(vcpu); | |
1642 | ||
66fd3f7f | 1643 | kvm_queue_interrupt(vcpu, irq->irq, false); |
f77bc6a4 ZX |
1644 | |
1645 | vcpu_put(vcpu); | |
1646 | ||
1647 | return 0; | |
1648 | } | |
1649 | ||
c4abb7c9 JK |
1650 | static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu *vcpu) |
1651 | { | |
1652 | vcpu_load(vcpu); | |
1653 | kvm_inject_nmi(vcpu); | |
1654 | vcpu_put(vcpu); | |
1655 | ||
1656 | return 0; | |
1657 | } | |
1658 | ||
b209749f AK |
1659 | static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu, |
1660 | struct kvm_tpr_access_ctl *tac) | |
1661 | { | |
1662 | if (tac->flags) | |
1663 | return -EINVAL; | |
1664 | vcpu->arch.tpr_access_reporting = !!tac->enabled; | |
1665 | return 0; | |
1666 | } | |
1667 | ||
890ca9ae HY |
1668 | static int kvm_vcpu_ioctl_x86_setup_mce(struct kvm_vcpu *vcpu, |
1669 | u64 mcg_cap) | |
1670 | { | |
1671 | int r; | |
1672 | unsigned bank_num = mcg_cap & 0xff, bank; | |
1673 | ||
1674 | r = -EINVAL; | |
1675 | if (!bank_num) | |
1676 | goto out; | |
1677 | if (mcg_cap & ~(KVM_MCE_CAP_SUPPORTED | 0xff | 0xff0000)) | |
1678 | goto out; | |
1679 | r = 0; | |
1680 | vcpu->arch.mcg_cap = mcg_cap; | |
1681 | /* Init IA32_MCG_CTL to all 1s */ | |
1682 | if (mcg_cap & MCG_CTL_P) | |
1683 | vcpu->arch.mcg_ctl = ~(u64)0; | |
1684 | /* Init IA32_MCi_CTL to all 1s */ | |
1685 | for (bank = 0; bank < bank_num; bank++) | |
1686 | vcpu->arch.mce_banks[bank*4] = ~(u64)0; | |
1687 | out: | |
1688 | return r; | |
1689 | } | |
1690 | ||
1691 | static int kvm_vcpu_ioctl_x86_set_mce(struct kvm_vcpu *vcpu, | |
1692 | struct kvm_x86_mce *mce) | |
1693 | { | |
1694 | u64 mcg_cap = vcpu->arch.mcg_cap; | |
1695 | unsigned bank_num = mcg_cap & 0xff; | |
1696 | u64 *banks = vcpu->arch.mce_banks; | |
1697 | ||
1698 | if (mce->bank >= bank_num || !(mce->status & MCI_STATUS_VAL)) | |
1699 | return -EINVAL; | |
1700 | /* | |
1701 | * if IA32_MCG_CTL is not all 1s, the uncorrected error | |
1702 | * reporting is disabled | |
1703 | */ | |
1704 | if ((mce->status & MCI_STATUS_UC) && (mcg_cap & MCG_CTL_P) && | |
1705 | vcpu->arch.mcg_ctl != ~(u64)0) | |
1706 | return 0; | |
1707 | banks += 4 * mce->bank; | |
1708 | /* | |
1709 | * if IA32_MCi_CTL is not all 1s, the uncorrected error | |
1710 | * reporting is disabled for the bank | |
1711 | */ | |
1712 | if ((mce->status & MCI_STATUS_UC) && banks[0] != ~(u64)0) | |
1713 | return 0; | |
1714 | if (mce->status & MCI_STATUS_UC) { | |
1715 | if ((vcpu->arch.mcg_status & MCG_STATUS_MCIP) || | |
1716 | !(vcpu->arch.cr4 & X86_CR4_MCE)) { | |
1717 | printk(KERN_DEBUG "kvm: set_mce: " | |
1718 | "injects mce exception while " | |
1719 | "previous one is in progress!\n"); | |
1720 | set_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests); | |
1721 | return 0; | |
1722 | } | |
1723 | if (banks[1] & MCI_STATUS_VAL) | |
1724 | mce->status |= MCI_STATUS_OVER; | |
1725 | banks[2] = mce->addr; | |
1726 | banks[3] = mce->misc; | |
1727 | vcpu->arch.mcg_status = mce->mcg_status; | |
1728 | banks[1] = mce->status; | |
1729 | kvm_queue_exception(vcpu, MC_VECTOR); | |
1730 | } else if (!(banks[1] & MCI_STATUS_VAL) | |
1731 | || !(banks[1] & MCI_STATUS_UC)) { | |
1732 | if (banks[1] & MCI_STATUS_VAL) | |
1733 | mce->status |= MCI_STATUS_OVER; | |
1734 | banks[2] = mce->addr; | |
1735 | banks[3] = mce->misc; | |
1736 | banks[1] = mce->status; | |
1737 | } else | |
1738 | banks[1] |= MCI_STATUS_OVER; | |
1739 | return 0; | |
1740 | } | |
1741 | ||
313a3dc7 CO |
1742 | long kvm_arch_vcpu_ioctl(struct file *filp, |
1743 | unsigned int ioctl, unsigned long arg) | |
1744 | { | |
1745 | struct kvm_vcpu *vcpu = filp->private_data; | |
1746 | void __user *argp = (void __user *)arg; | |
1747 | int r; | |
b772ff36 | 1748 | struct kvm_lapic_state *lapic = NULL; |
313a3dc7 CO |
1749 | |
1750 | switch (ioctl) { | |
1751 | case KVM_GET_LAPIC: { | |
b772ff36 | 1752 | lapic = kzalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
313a3dc7 | 1753 | |
b772ff36 DH |
1754 | r = -ENOMEM; |
1755 | if (!lapic) | |
1756 | goto out; | |
1757 | r = kvm_vcpu_ioctl_get_lapic(vcpu, lapic); | |
313a3dc7 CO |
1758 | if (r) |
1759 | goto out; | |
1760 | r = -EFAULT; | |
b772ff36 | 1761 | if (copy_to_user(argp, lapic, sizeof(struct kvm_lapic_state))) |
313a3dc7 CO |
1762 | goto out; |
1763 | r = 0; | |
1764 | break; | |
1765 | } | |
1766 | case KVM_SET_LAPIC: { | |
b772ff36 DH |
1767 | lapic = kmalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
1768 | r = -ENOMEM; | |
1769 | if (!lapic) | |
1770 | goto out; | |
313a3dc7 | 1771 | r = -EFAULT; |
b772ff36 | 1772 | if (copy_from_user(lapic, argp, sizeof(struct kvm_lapic_state))) |
313a3dc7 | 1773 | goto out; |
b772ff36 | 1774 | r = kvm_vcpu_ioctl_set_lapic(vcpu, lapic); |
313a3dc7 CO |
1775 | if (r) |
1776 | goto out; | |
1777 | r = 0; | |
1778 | break; | |
1779 | } | |
f77bc6a4 ZX |
1780 | case KVM_INTERRUPT: { |
1781 | struct kvm_interrupt irq; | |
1782 | ||
1783 | r = -EFAULT; | |
1784 | if (copy_from_user(&irq, argp, sizeof irq)) | |
1785 | goto out; | |
1786 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); | |
1787 | if (r) | |
1788 | goto out; | |
1789 | r = 0; | |
1790 | break; | |
1791 | } | |
c4abb7c9 JK |
1792 | case KVM_NMI: { |
1793 | r = kvm_vcpu_ioctl_nmi(vcpu); | |
1794 | if (r) | |
1795 | goto out; | |
1796 | r = 0; | |
1797 | break; | |
1798 | } | |
313a3dc7 CO |
1799 | case KVM_SET_CPUID: { |
1800 | struct kvm_cpuid __user *cpuid_arg = argp; | |
1801 | struct kvm_cpuid cpuid; | |
1802 | ||
1803 | r = -EFAULT; | |
1804 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
1805 | goto out; | |
1806 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); | |
1807 | if (r) | |
1808 | goto out; | |
1809 | break; | |
1810 | } | |
07716717 DK |
1811 | case KVM_SET_CPUID2: { |
1812 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
1813 | struct kvm_cpuid2 cpuid; | |
1814 | ||
1815 | r = -EFAULT; | |
1816 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
1817 | goto out; | |
1818 | r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid, | |
19355475 | 1819 | cpuid_arg->entries); |
07716717 DK |
1820 | if (r) |
1821 | goto out; | |
1822 | break; | |
1823 | } | |
1824 | case KVM_GET_CPUID2: { | |
1825 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
1826 | struct kvm_cpuid2 cpuid; | |
1827 | ||
1828 | r = -EFAULT; | |
1829 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
1830 | goto out; | |
1831 | r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid, | |
19355475 | 1832 | cpuid_arg->entries); |
07716717 DK |
1833 | if (r) |
1834 | goto out; | |
1835 | r = -EFAULT; | |
1836 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
1837 | goto out; | |
1838 | r = 0; | |
1839 | break; | |
1840 | } | |
313a3dc7 CO |
1841 | case KVM_GET_MSRS: |
1842 | r = msr_io(vcpu, argp, kvm_get_msr, 1); | |
1843 | break; | |
1844 | case KVM_SET_MSRS: | |
1845 | r = msr_io(vcpu, argp, do_set_msr, 0); | |
1846 | break; | |
b209749f AK |
1847 | case KVM_TPR_ACCESS_REPORTING: { |
1848 | struct kvm_tpr_access_ctl tac; | |
1849 | ||
1850 | r = -EFAULT; | |
1851 | if (copy_from_user(&tac, argp, sizeof tac)) | |
1852 | goto out; | |
1853 | r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac); | |
1854 | if (r) | |
1855 | goto out; | |
1856 | r = -EFAULT; | |
1857 | if (copy_to_user(argp, &tac, sizeof tac)) | |
1858 | goto out; | |
1859 | r = 0; | |
1860 | break; | |
1861 | }; | |
b93463aa AK |
1862 | case KVM_SET_VAPIC_ADDR: { |
1863 | struct kvm_vapic_addr va; | |
1864 | ||
1865 | r = -EINVAL; | |
1866 | if (!irqchip_in_kernel(vcpu->kvm)) | |
1867 | goto out; | |
1868 | r = -EFAULT; | |
1869 | if (copy_from_user(&va, argp, sizeof va)) | |
1870 | goto out; | |
1871 | r = 0; | |
1872 | kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr); | |
1873 | break; | |
1874 | } | |
890ca9ae HY |
1875 | case KVM_X86_SETUP_MCE: { |
1876 | u64 mcg_cap; | |
1877 | ||
1878 | r = -EFAULT; | |
1879 | if (copy_from_user(&mcg_cap, argp, sizeof mcg_cap)) | |
1880 | goto out; | |
1881 | r = kvm_vcpu_ioctl_x86_setup_mce(vcpu, mcg_cap); | |
1882 | break; | |
1883 | } | |
1884 | case KVM_X86_SET_MCE: { | |
1885 | struct kvm_x86_mce mce; | |
1886 | ||
1887 | r = -EFAULT; | |
1888 | if (copy_from_user(&mce, argp, sizeof mce)) | |
1889 | goto out; | |
1890 | r = kvm_vcpu_ioctl_x86_set_mce(vcpu, &mce); | |
1891 | break; | |
1892 | } | |
313a3dc7 CO |
1893 | default: |
1894 | r = -EINVAL; | |
1895 | } | |
1896 | out: | |
7a6ce84c | 1897 | kfree(lapic); |
313a3dc7 CO |
1898 | return r; |
1899 | } | |
1900 | ||
1fe779f8 CO |
1901 | static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr) |
1902 | { | |
1903 | int ret; | |
1904 | ||
1905 | if (addr > (unsigned int)(-3 * PAGE_SIZE)) | |
1906 | return -1; | |
1907 | ret = kvm_x86_ops->set_tss_addr(kvm, addr); | |
1908 | return ret; | |
1909 | } | |
1910 | ||
1911 | static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm, | |
1912 | u32 kvm_nr_mmu_pages) | |
1913 | { | |
1914 | if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES) | |
1915 | return -EINVAL; | |
1916 | ||
72dc67a6 | 1917 | down_write(&kvm->slots_lock); |
7c8a83b7 | 1918 | spin_lock(&kvm->mmu_lock); |
1fe779f8 CO |
1919 | |
1920 | kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages); | |
f05e70ac | 1921 | kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages; |
1fe779f8 | 1922 | |
7c8a83b7 | 1923 | spin_unlock(&kvm->mmu_lock); |
72dc67a6 | 1924 | up_write(&kvm->slots_lock); |
1fe779f8 CO |
1925 | return 0; |
1926 | } | |
1927 | ||
1928 | static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm) | |
1929 | { | |
f05e70ac | 1930 | return kvm->arch.n_alloc_mmu_pages; |
1fe779f8 CO |
1931 | } |
1932 | ||
e9f85cde ZX |
1933 | gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) |
1934 | { | |
1935 | int i; | |
1936 | struct kvm_mem_alias *alias; | |
1937 | ||
d69fb81f ZX |
1938 | for (i = 0; i < kvm->arch.naliases; ++i) { |
1939 | alias = &kvm->arch.aliases[i]; | |
e9f85cde ZX |
1940 | if (gfn >= alias->base_gfn |
1941 | && gfn < alias->base_gfn + alias->npages) | |
1942 | return alias->target_gfn + gfn - alias->base_gfn; | |
1943 | } | |
1944 | return gfn; | |
1945 | } | |
1946 | ||
1fe779f8 CO |
1947 | /* |
1948 | * Set a new alias region. Aliases map a portion of physical memory into | |
1949 | * another portion. This is useful for memory windows, for example the PC | |
1950 | * VGA region. | |
1951 | */ | |
1952 | static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm, | |
1953 | struct kvm_memory_alias *alias) | |
1954 | { | |
1955 | int r, n; | |
1956 | struct kvm_mem_alias *p; | |
1957 | ||
1958 | r = -EINVAL; | |
1959 | /* General sanity checks */ | |
1960 | if (alias->memory_size & (PAGE_SIZE - 1)) | |
1961 | goto out; | |
1962 | if (alias->guest_phys_addr & (PAGE_SIZE - 1)) | |
1963 | goto out; | |
1964 | if (alias->slot >= KVM_ALIAS_SLOTS) | |
1965 | goto out; | |
1966 | if (alias->guest_phys_addr + alias->memory_size | |
1967 | < alias->guest_phys_addr) | |
1968 | goto out; | |
1969 | if (alias->target_phys_addr + alias->memory_size | |
1970 | < alias->target_phys_addr) | |
1971 | goto out; | |
1972 | ||
72dc67a6 | 1973 | down_write(&kvm->slots_lock); |
a1708ce8 | 1974 | spin_lock(&kvm->mmu_lock); |
1fe779f8 | 1975 | |
d69fb81f | 1976 | p = &kvm->arch.aliases[alias->slot]; |
1fe779f8 CO |
1977 | p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT; |
1978 | p->npages = alias->memory_size >> PAGE_SHIFT; | |
1979 | p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT; | |
1980 | ||
1981 | for (n = KVM_ALIAS_SLOTS; n > 0; --n) | |
d69fb81f | 1982 | if (kvm->arch.aliases[n - 1].npages) |
1fe779f8 | 1983 | break; |
d69fb81f | 1984 | kvm->arch.naliases = n; |
1fe779f8 | 1985 | |
a1708ce8 | 1986 | spin_unlock(&kvm->mmu_lock); |
1fe779f8 CO |
1987 | kvm_mmu_zap_all(kvm); |
1988 | ||
72dc67a6 | 1989 | up_write(&kvm->slots_lock); |
1fe779f8 CO |
1990 | |
1991 | return 0; | |
1992 | ||
1993 | out: | |
1994 | return r; | |
1995 | } | |
1996 | ||
1997 | static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
1998 | { | |
1999 | int r; | |
2000 | ||
2001 | r = 0; | |
2002 | switch (chip->chip_id) { | |
2003 | case KVM_IRQCHIP_PIC_MASTER: | |
2004 | memcpy(&chip->chip.pic, | |
2005 | &pic_irqchip(kvm)->pics[0], | |
2006 | sizeof(struct kvm_pic_state)); | |
2007 | break; | |
2008 | case KVM_IRQCHIP_PIC_SLAVE: | |
2009 | memcpy(&chip->chip.pic, | |
2010 | &pic_irqchip(kvm)->pics[1], | |
2011 | sizeof(struct kvm_pic_state)); | |
2012 | break; | |
2013 | case KVM_IRQCHIP_IOAPIC: | |
2014 | memcpy(&chip->chip.ioapic, | |
2015 | ioapic_irqchip(kvm), | |
2016 | sizeof(struct kvm_ioapic_state)); | |
2017 | break; | |
2018 | default: | |
2019 | r = -EINVAL; | |
2020 | break; | |
2021 | } | |
2022 | return r; | |
2023 | } | |
2024 | ||
2025 | static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
2026 | { | |
2027 | int r; | |
2028 | ||
2029 | r = 0; | |
2030 | switch (chip->chip_id) { | |
2031 | case KVM_IRQCHIP_PIC_MASTER: | |
894a9c55 | 2032 | spin_lock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
2033 | memcpy(&pic_irqchip(kvm)->pics[0], |
2034 | &chip->chip.pic, | |
2035 | sizeof(struct kvm_pic_state)); | |
894a9c55 | 2036 | spin_unlock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
2037 | break; |
2038 | case KVM_IRQCHIP_PIC_SLAVE: | |
894a9c55 | 2039 | spin_lock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
2040 | memcpy(&pic_irqchip(kvm)->pics[1], |
2041 | &chip->chip.pic, | |
2042 | sizeof(struct kvm_pic_state)); | |
894a9c55 | 2043 | spin_unlock(&pic_irqchip(kvm)->lock); |
1fe779f8 CO |
2044 | break; |
2045 | case KVM_IRQCHIP_IOAPIC: | |
894a9c55 | 2046 | mutex_lock(&kvm->irq_lock); |
1fe779f8 CO |
2047 | memcpy(ioapic_irqchip(kvm), |
2048 | &chip->chip.ioapic, | |
2049 | sizeof(struct kvm_ioapic_state)); | |
894a9c55 | 2050 | mutex_unlock(&kvm->irq_lock); |
1fe779f8 CO |
2051 | break; |
2052 | default: | |
2053 | r = -EINVAL; | |
2054 | break; | |
2055 | } | |
2056 | kvm_pic_update_irq(pic_irqchip(kvm)); | |
2057 | return r; | |
2058 | } | |
2059 | ||
e0f63cb9 SY |
2060 | static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps) |
2061 | { | |
2062 | int r = 0; | |
2063 | ||
894a9c55 | 2064 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 | 2065 | memcpy(ps, &kvm->arch.vpit->pit_state, sizeof(struct kvm_pit_state)); |
894a9c55 | 2066 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 SY |
2067 | return r; |
2068 | } | |
2069 | ||
2070 | static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps) | |
2071 | { | |
2072 | int r = 0; | |
2073 | ||
894a9c55 | 2074 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 | 2075 | memcpy(&kvm->arch.vpit->pit_state, ps, sizeof(struct kvm_pit_state)); |
e9f42757 BK |
2076 | kvm_pit_load_count(kvm, 0, ps->channels[0].count, 0); |
2077 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); | |
2078 | return r; | |
2079 | } | |
2080 | ||
2081 | static int kvm_vm_ioctl_get_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
2082 | { | |
2083 | int r = 0; | |
2084 | ||
2085 | mutex_lock(&kvm->arch.vpit->pit_state.lock); | |
2086 | memcpy(ps->channels, &kvm->arch.vpit->pit_state.channels, | |
2087 | sizeof(ps->channels)); | |
2088 | ps->flags = kvm->arch.vpit->pit_state.flags; | |
2089 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); | |
2090 | return r; | |
2091 | } | |
2092 | ||
2093 | static int kvm_vm_ioctl_set_pit2(struct kvm *kvm, struct kvm_pit_state2 *ps) | |
2094 | { | |
2095 | int r = 0, start = 0; | |
2096 | u32 prev_legacy, cur_legacy; | |
2097 | mutex_lock(&kvm->arch.vpit->pit_state.lock); | |
2098 | prev_legacy = kvm->arch.vpit->pit_state.flags & KVM_PIT_FLAGS_HPET_LEGACY; | |
2099 | cur_legacy = ps->flags & KVM_PIT_FLAGS_HPET_LEGACY; | |
2100 | if (!prev_legacy && cur_legacy) | |
2101 | start = 1; | |
2102 | memcpy(&kvm->arch.vpit->pit_state.channels, &ps->channels, | |
2103 | sizeof(kvm->arch.vpit->pit_state.channels)); | |
2104 | kvm->arch.vpit->pit_state.flags = ps->flags; | |
2105 | kvm_pit_load_count(kvm, 0, kvm->arch.vpit->pit_state.channels[0].count, start); | |
894a9c55 | 2106 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
e0f63cb9 SY |
2107 | return r; |
2108 | } | |
2109 | ||
52d939a0 MT |
2110 | static int kvm_vm_ioctl_reinject(struct kvm *kvm, |
2111 | struct kvm_reinject_control *control) | |
2112 | { | |
2113 | if (!kvm->arch.vpit) | |
2114 | return -ENXIO; | |
894a9c55 | 2115 | mutex_lock(&kvm->arch.vpit->pit_state.lock); |
52d939a0 | 2116 | kvm->arch.vpit->pit_state.pit_timer.reinject = control->pit_reinject; |
894a9c55 | 2117 | mutex_unlock(&kvm->arch.vpit->pit_state.lock); |
52d939a0 MT |
2118 | return 0; |
2119 | } | |
2120 | ||
5bb064dc ZX |
2121 | /* |
2122 | * Get (and clear) the dirty memory log for a memory slot. | |
2123 | */ | |
2124 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
2125 | struct kvm_dirty_log *log) | |
2126 | { | |
2127 | int r; | |
2128 | int n; | |
2129 | struct kvm_memory_slot *memslot; | |
2130 | int is_dirty = 0; | |
2131 | ||
72dc67a6 | 2132 | down_write(&kvm->slots_lock); |
5bb064dc ZX |
2133 | |
2134 | r = kvm_get_dirty_log(kvm, log, &is_dirty); | |
2135 | if (r) | |
2136 | goto out; | |
2137 | ||
2138 | /* If nothing is dirty, don't bother messing with page tables. */ | |
2139 | if (is_dirty) { | |
7c8a83b7 | 2140 | spin_lock(&kvm->mmu_lock); |
5bb064dc | 2141 | kvm_mmu_slot_remove_write_access(kvm, log->slot); |
7c8a83b7 | 2142 | spin_unlock(&kvm->mmu_lock); |
5bb064dc ZX |
2143 | kvm_flush_remote_tlbs(kvm); |
2144 | memslot = &kvm->memslots[log->slot]; | |
2145 | n = ALIGN(memslot->npages, BITS_PER_LONG) / 8; | |
2146 | memset(memslot->dirty_bitmap, 0, n); | |
2147 | } | |
2148 | r = 0; | |
2149 | out: | |
72dc67a6 | 2150 | up_write(&kvm->slots_lock); |
5bb064dc ZX |
2151 | return r; |
2152 | } | |
2153 | ||
1fe779f8 CO |
2154 | long kvm_arch_vm_ioctl(struct file *filp, |
2155 | unsigned int ioctl, unsigned long arg) | |
2156 | { | |
2157 | struct kvm *kvm = filp->private_data; | |
2158 | void __user *argp = (void __user *)arg; | |
2159 | int r = -EINVAL; | |
f0d66275 DH |
2160 | /* |
2161 | * This union makes it completely explicit to gcc-3.x | |
2162 | * that these two variables' stack usage should be | |
2163 | * combined, not added together. | |
2164 | */ | |
2165 | union { | |
2166 | struct kvm_pit_state ps; | |
e9f42757 | 2167 | struct kvm_pit_state2 ps2; |
f0d66275 | 2168 | struct kvm_memory_alias alias; |
c5ff41ce | 2169 | struct kvm_pit_config pit_config; |
f0d66275 | 2170 | } u; |
1fe779f8 CO |
2171 | |
2172 | switch (ioctl) { | |
2173 | case KVM_SET_TSS_ADDR: | |
2174 | r = kvm_vm_ioctl_set_tss_addr(kvm, arg); | |
2175 | if (r < 0) | |
2176 | goto out; | |
2177 | break; | |
2178 | case KVM_SET_MEMORY_REGION: { | |
2179 | struct kvm_memory_region kvm_mem; | |
2180 | struct kvm_userspace_memory_region kvm_userspace_mem; | |
2181 | ||
2182 | r = -EFAULT; | |
2183 | if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem)) | |
2184 | goto out; | |
2185 | kvm_userspace_mem.slot = kvm_mem.slot; | |
2186 | kvm_userspace_mem.flags = kvm_mem.flags; | |
2187 | kvm_userspace_mem.guest_phys_addr = kvm_mem.guest_phys_addr; | |
2188 | kvm_userspace_mem.memory_size = kvm_mem.memory_size; | |
2189 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 0); | |
2190 | if (r) | |
2191 | goto out; | |
2192 | break; | |
2193 | } | |
2194 | case KVM_SET_NR_MMU_PAGES: | |
2195 | r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg); | |
2196 | if (r) | |
2197 | goto out; | |
2198 | break; | |
2199 | case KVM_GET_NR_MMU_PAGES: | |
2200 | r = kvm_vm_ioctl_get_nr_mmu_pages(kvm); | |
2201 | break; | |
f0d66275 | 2202 | case KVM_SET_MEMORY_ALIAS: |
1fe779f8 | 2203 | r = -EFAULT; |
f0d66275 | 2204 | if (copy_from_user(&u.alias, argp, sizeof(struct kvm_memory_alias))) |
1fe779f8 | 2205 | goto out; |
f0d66275 | 2206 | r = kvm_vm_ioctl_set_memory_alias(kvm, &u.alias); |
1fe779f8 CO |
2207 | if (r) |
2208 | goto out; | |
2209 | break; | |
1fe779f8 CO |
2210 | case KVM_CREATE_IRQCHIP: |
2211 | r = -ENOMEM; | |
d7deeeb0 ZX |
2212 | kvm->arch.vpic = kvm_create_pic(kvm); |
2213 | if (kvm->arch.vpic) { | |
1fe779f8 CO |
2214 | r = kvm_ioapic_init(kvm); |
2215 | if (r) { | |
d7deeeb0 ZX |
2216 | kfree(kvm->arch.vpic); |
2217 | kvm->arch.vpic = NULL; | |
1fe779f8 CO |
2218 | goto out; |
2219 | } | |
2220 | } else | |
2221 | goto out; | |
399ec807 AK |
2222 | r = kvm_setup_default_irq_routing(kvm); |
2223 | if (r) { | |
2224 | kfree(kvm->arch.vpic); | |
2225 | kfree(kvm->arch.vioapic); | |
2226 | goto out; | |
2227 | } | |
1fe779f8 | 2228 | break; |
7837699f | 2229 | case KVM_CREATE_PIT: |
c5ff41ce JK |
2230 | u.pit_config.flags = KVM_PIT_SPEAKER_DUMMY; |
2231 | goto create_pit; | |
2232 | case KVM_CREATE_PIT2: | |
2233 | r = -EFAULT; | |
2234 | if (copy_from_user(&u.pit_config, argp, | |
2235 | sizeof(struct kvm_pit_config))) | |
2236 | goto out; | |
2237 | create_pit: | |
108b5669 | 2238 | down_write(&kvm->slots_lock); |
269e05e4 AK |
2239 | r = -EEXIST; |
2240 | if (kvm->arch.vpit) | |
2241 | goto create_pit_unlock; | |
7837699f | 2242 | r = -ENOMEM; |
c5ff41ce | 2243 | kvm->arch.vpit = kvm_create_pit(kvm, u.pit_config.flags); |
7837699f SY |
2244 | if (kvm->arch.vpit) |
2245 | r = 0; | |
269e05e4 | 2246 | create_pit_unlock: |
108b5669 | 2247 | up_write(&kvm->slots_lock); |
7837699f | 2248 | break; |
4925663a | 2249 | case KVM_IRQ_LINE_STATUS: |
1fe779f8 CO |
2250 | case KVM_IRQ_LINE: { |
2251 | struct kvm_irq_level irq_event; | |
2252 | ||
2253 | r = -EFAULT; | |
2254 | if (copy_from_user(&irq_event, argp, sizeof irq_event)) | |
2255 | goto out; | |
2256 | if (irqchip_in_kernel(kvm)) { | |
4925663a | 2257 | __s32 status; |
fa40a821 | 2258 | mutex_lock(&kvm->irq_lock); |
4925663a GN |
2259 | status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, |
2260 | irq_event.irq, irq_event.level); | |
fa40a821 | 2261 | mutex_unlock(&kvm->irq_lock); |
4925663a GN |
2262 | if (ioctl == KVM_IRQ_LINE_STATUS) { |
2263 | irq_event.status = status; | |
2264 | if (copy_to_user(argp, &irq_event, | |
2265 | sizeof irq_event)) | |
2266 | goto out; | |
2267 | } | |
1fe779f8 CO |
2268 | r = 0; |
2269 | } | |
2270 | break; | |
2271 | } | |
2272 | case KVM_GET_IRQCHIP: { | |
2273 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
f0d66275 | 2274 | struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); |
1fe779f8 | 2275 | |
f0d66275 DH |
2276 | r = -ENOMEM; |
2277 | if (!chip) | |
1fe779f8 | 2278 | goto out; |
f0d66275 DH |
2279 | r = -EFAULT; |
2280 | if (copy_from_user(chip, argp, sizeof *chip)) | |
2281 | goto get_irqchip_out; | |
1fe779f8 CO |
2282 | r = -ENXIO; |
2283 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
2284 | goto get_irqchip_out; |
2285 | r = kvm_vm_ioctl_get_irqchip(kvm, chip); | |
1fe779f8 | 2286 | if (r) |
f0d66275 | 2287 | goto get_irqchip_out; |
1fe779f8 | 2288 | r = -EFAULT; |
f0d66275 DH |
2289 | if (copy_to_user(argp, chip, sizeof *chip)) |
2290 | goto get_irqchip_out; | |
1fe779f8 | 2291 | r = 0; |
f0d66275 DH |
2292 | get_irqchip_out: |
2293 | kfree(chip); | |
2294 | if (r) | |
2295 | goto out; | |
1fe779f8 CO |
2296 | break; |
2297 | } | |
2298 | case KVM_SET_IRQCHIP: { | |
2299 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
f0d66275 | 2300 | struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); |
1fe779f8 | 2301 | |
f0d66275 DH |
2302 | r = -ENOMEM; |
2303 | if (!chip) | |
1fe779f8 | 2304 | goto out; |
f0d66275 DH |
2305 | r = -EFAULT; |
2306 | if (copy_from_user(chip, argp, sizeof *chip)) | |
2307 | goto set_irqchip_out; | |
1fe779f8 CO |
2308 | r = -ENXIO; |
2309 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
2310 | goto set_irqchip_out; |
2311 | r = kvm_vm_ioctl_set_irqchip(kvm, chip); | |
1fe779f8 | 2312 | if (r) |
f0d66275 | 2313 | goto set_irqchip_out; |
1fe779f8 | 2314 | r = 0; |
f0d66275 DH |
2315 | set_irqchip_out: |
2316 | kfree(chip); | |
2317 | if (r) | |
2318 | goto out; | |
1fe779f8 CO |
2319 | break; |
2320 | } | |
e0f63cb9 | 2321 | case KVM_GET_PIT: { |
e0f63cb9 | 2322 | r = -EFAULT; |
f0d66275 | 2323 | if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
2324 | goto out; |
2325 | r = -ENXIO; | |
2326 | if (!kvm->arch.vpit) | |
2327 | goto out; | |
f0d66275 | 2328 | r = kvm_vm_ioctl_get_pit(kvm, &u.ps); |
e0f63cb9 SY |
2329 | if (r) |
2330 | goto out; | |
2331 | r = -EFAULT; | |
f0d66275 | 2332 | if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
2333 | goto out; |
2334 | r = 0; | |
2335 | break; | |
2336 | } | |
2337 | case KVM_SET_PIT: { | |
e0f63cb9 | 2338 | r = -EFAULT; |
f0d66275 | 2339 | if (copy_from_user(&u.ps, argp, sizeof u.ps)) |
e0f63cb9 SY |
2340 | goto out; |
2341 | r = -ENXIO; | |
2342 | if (!kvm->arch.vpit) | |
2343 | goto out; | |
f0d66275 | 2344 | r = kvm_vm_ioctl_set_pit(kvm, &u.ps); |
e0f63cb9 SY |
2345 | if (r) |
2346 | goto out; | |
2347 | r = 0; | |
2348 | break; | |
2349 | } | |
e9f42757 BK |
2350 | case KVM_GET_PIT2: { |
2351 | r = -ENXIO; | |
2352 | if (!kvm->arch.vpit) | |
2353 | goto out; | |
2354 | r = kvm_vm_ioctl_get_pit2(kvm, &u.ps2); | |
2355 | if (r) | |
2356 | goto out; | |
2357 | r = -EFAULT; | |
2358 | if (copy_to_user(argp, &u.ps2, sizeof(u.ps2))) | |
2359 | goto out; | |
2360 | r = 0; | |
2361 | break; | |
2362 | } | |
2363 | case KVM_SET_PIT2: { | |
2364 | r = -EFAULT; | |
2365 | if (copy_from_user(&u.ps2, argp, sizeof(u.ps2))) | |
2366 | goto out; | |
2367 | r = -ENXIO; | |
2368 | if (!kvm->arch.vpit) | |
2369 | goto out; | |
2370 | r = kvm_vm_ioctl_set_pit2(kvm, &u.ps2); | |
2371 | if (r) | |
2372 | goto out; | |
2373 | r = 0; | |
2374 | break; | |
2375 | } | |
52d939a0 MT |
2376 | case KVM_REINJECT_CONTROL: { |
2377 | struct kvm_reinject_control control; | |
2378 | r = -EFAULT; | |
2379 | if (copy_from_user(&control, argp, sizeof(control))) | |
2380 | goto out; | |
2381 | r = kvm_vm_ioctl_reinject(kvm, &control); | |
2382 | if (r) | |
2383 | goto out; | |
2384 | r = 0; | |
2385 | break; | |
2386 | } | |
1fe779f8 CO |
2387 | default: |
2388 | ; | |
2389 | } | |
2390 | out: | |
2391 | return r; | |
2392 | } | |
2393 | ||
a16b043c | 2394 | static void kvm_init_msr_list(void) |
043405e1 CO |
2395 | { |
2396 | u32 dummy[2]; | |
2397 | unsigned i, j; | |
2398 | ||
2399 | for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) { | |
2400 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) | |
2401 | continue; | |
2402 | if (j < i) | |
2403 | msrs_to_save[j] = msrs_to_save[i]; | |
2404 | j++; | |
2405 | } | |
2406 | num_msrs_to_save = j; | |
2407 | } | |
2408 | ||
bda9020e MT |
2409 | static int vcpu_mmio_write(struct kvm_vcpu *vcpu, gpa_t addr, int len, |
2410 | const void *v) | |
bbd9b64e | 2411 | { |
bda9020e MT |
2412 | if (vcpu->arch.apic && |
2413 | !kvm_iodevice_write(&vcpu->arch.apic->dev, addr, len, v)) | |
2414 | return 0; | |
bbd9b64e | 2415 | |
bda9020e | 2416 | return kvm_io_bus_write(&vcpu->kvm->mmio_bus, addr, len, v); |
bbd9b64e CO |
2417 | } |
2418 | ||
bda9020e | 2419 | static int vcpu_mmio_read(struct kvm_vcpu *vcpu, gpa_t addr, int len, void *v) |
bbd9b64e | 2420 | { |
bda9020e MT |
2421 | if (vcpu->arch.apic && |
2422 | !kvm_iodevice_read(&vcpu->arch.apic->dev, addr, len, v)) | |
2423 | return 0; | |
bbd9b64e | 2424 | |
bda9020e | 2425 | return kvm_io_bus_read(&vcpu->kvm->mmio_bus, addr, len, v); |
bbd9b64e CO |
2426 | } |
2427 | ||
cded19f3 HE |
2428 | static int kvm_read_guest_virt(gva_t addr, void *val, unsigned int bytes, |
2429 | struct kvm_vcpu *vcpu) | |
bbd9b64e CO |
2430 | { |
2431 | void *data = val; | |
10589a46 | 2432 | int r = X86EMUL_CONTINUE; |
bbd9b64e CO |
2433 | |
2434 | while (bytes) { | |
ad312c7c | 2435 | gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
bbd9b64e | 2436 | unsigned offset = addr & (PAGE_SIZE-1); |
77c2002e | 2437 | unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset); |
bbd9b64e CO |
2438 | int ret; |
2439 | ||
10589a46 MT |
2440 | if (gpa == UNMAPPED_GVA) { |
2441 | r = X86EMUL_PROPAGATE_FAULT; | |
2442 | goto out; | |
2443 | } | |
77c2002e | 2444 | ret = kvm_read_guest(vcpu->kvm, gpa, data, toread); |
10589a46 MT |
2445 | if (ret < 0) { |
2446 | r = X86EMUL_UNHANDLEABLE; | |
2447 | goto out; | |
2448 | } | |
bbd9b64e | 2449 | |
77c2002e IE |
2450 | bytes -= toread; |
2451 | data += toread; | |
2452 | addr += toread; | |
bbd9b64e | 2453 | } |
10589a46 | 2454 | out: |
10589a46 | 2455 | return r; |
bbd9b64e | 2456 | } |
77c2002e | 2457 | |
cded19f3 HE |
2458 | static int kvm_write_guest_virt(gva_t addr, void *val, unsigned int bytes, |
2459 | struct kvm_vcpu *vcpu) | |
77c2002e IE |
2460 | { |
2461 | void *data = val; | |
2462 | int r = X86EMUL_CONTINUE; | |
2463 | ||
2464 | while (bytes) { | |
2465 | gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); | |
2466 | unsigned offset = addr & (PAGE_SIZE-1); | |
2467 | unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset); | |
2468 | int ret; | |
2469 | ||
2470 | if (gpa == UNMAPPED_GVA) { | |
2471 | r = X86EMUL_PROPAGATE_FAULT; | |
2472 | goto out; | |
2473 | } | |
2474 | ret = kvm_write_guest(vcpu->kvm, gpa, data, towrite); | |
2475 | if (ret < 0) { | |
2476 | r = X86EMUL_UNHANDLEABLE; | |
2477 | goto out; | |
2478 | } | |
2479 | ||
2480 | bytes -= towrite; | |
2481 | data += towrite; | |
2482 | addr += towrite; | |
2483 | } | |
2484 | out: | |
2485 | return r; | |
2486 | } | |
2487 | ||
bbd9b64e | 2488 | |
bbd9b64e CO |
2489 | static int emulator_read_emulated(unsigned long addr, |
2490 | void *val, | |
2491 | unsigned int bytes, | |
2492 | struct kvm_vcpu *vcpu) | |
2493 | { | |
bbd9b64e CO |
2494 | gpa_t gpa; |
2495 | ||
2496 | if (vcpu->mmio_read_completed) { | |
2497 | memcpy(val, vcpu->mmio_data, bytes); | |
aec51dc4 AK |
2498 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, |
2499 | vcpu->mmio_phys_addr, *(u64 *)val); | |
bbd9b64e CO |
2500 | vcpu->mmio_read_completed = 0; |
2501 | return X86EMUL_CONTINUE; | |
2502 | } | |
2503 | ||
ad312c7c | 2504 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
bbd9b64e CO |
2505 | |
2506 | /* For APIC access vmexit */ | |
2507 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
2508 | goto mmio; | |
2509 | ||
77c2002e IE |
2510 | if (kvm_read_guest_virt(addr, val, bytes, vcpu) |
2511 | == X86EMUL_CONTINUE) | |
bbd9b64e CO |
2512 | return X86EMUL_CONTINUE; |
2513 | if (gpa == UNMAPPED_GVA) | |
2514 | return X86EMUL_PROPAGATE_FAULT; | |
2515 | ||
2516 | mmio: | |
2517 | /* | |
2518 | * Is this MMIO handled locally? | |
2519 | */ | |
aec51dc4 AK |
2520 | if (!vcpu_mmio_read(vcpu, gpa, bytes, val)) { |
2521 | trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, gpa, *(u64 *)val); | |
bbd9b64e | 2522 | return X86EMUL_CONTINUE; |
aec51dc4 AK |
2523 | } |
2524 | ||
2525 | trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED, bytes, gpa, 0); | |
bbd9b64e CO |
2526 | |
2527 | vcpu->mmio_needed = 1; | |
2528 | vcpu->mmio_phys_addr = gpa; | |
2529 | vcpu->mmio_size = bytes; | |
2530 | vcpu->mmio_is_write = 0; | |
2531 | ||
2532 | return X86EMUL_UNHANDLEABLE; | |
2533 | } | |
2534 | ||
3200f405 | 2535 | int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
9f811285 | 2536 | const void *val, int bytes) |
bbd9b64e CO |
2537 | { |
2538 | int ret; | |
2539 | ||
2540 | ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes); | |
9f811285 | 2541 | if (ret < 0) |
bbd9b64e | 2542 | return 0; |
ad218f85 | 2543 | kvm_mmu_pte_write(vcpu, gpa, val, bytes, 1); |
bbd9b64e CO |
2544 | return 1; |
2545 | } | |
2546 | ||
2547 | static int emulator_write_emulated_onepage(unsigned long addr, | |
2548 | const void *val, | |
2549 | unsigned int bytes, | |
2550 | struct kvm_vcpu *vcpu) | |
2551 | { | |
10589a46 MT |
2552 | gpa_t gpa; |
2553 | ||
10589a46 | 2554 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
bbd9b64e CO |
2555 | |
2556 | if (gpa == UNMAPPED_GVA) { | |
c3c91fee | 2557 | kvm_inject_page_fault(vcpu, addr, 2); |
bbd9b64e CO |
2558 | return X86EMUL_PROPAGATE_FAULT; |
2559 | } | |
2560 | ||
2561 | /* For APIC access vmexit */ | |
2562 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
2563 | goto mmio; | |
2564 | ||
2565 | if (emulator_write_phys(vcpu, gpa, val, bytes)) | |
2566 | return X86EMUL_CONTINUE; | |
2567 | ||
2568 | mmio: | |
aec51dc4 | 2569 | trace_kvm_mmio(KVM_TRACE_MMIO_WRITE, bytes, gpa, *(u64 *)val); |
bbd9b64e CO |
2570 | /* |
2571 | * Is this MMIO handled locally? | |
2572 | */ | |
bda9020e | 2573 | if (!vcpu_mmio_write(vcpu, gpa, bytes, val)) |
bbd9b64e | 2574 | return X86EMUL_CONTINUE; |
bbd9b64e CO |
2575 | |
2576 | vcpu->mmio_needed = 1; | |
2577 | vcpu->mmio_phys_addr = gpa; | |
2578 | vcpu->mmio_size = bytes; | |
2579 | vcpu->mmio_is_write = 1; | |
2580 | memcpy(vcpu->mmio_data, val, bytes); | |
2581 | ||
2582 | return X86EMUL_CONTINUE; | |
2583 | } | |
2584 | ||
2585 | int emulator_write_emulated(unsigned long addr, | |
2586 | const void *val, | |
2587 | unsigned int bytes, | |
2588 | struct kvm_vcpu *vcpu) | |
2589 | { | |
2590 | /* Crossing a page boundary? */ | |
2591 | if (((addr + bytes - 1) ^ addr) & PAGE_MASK) { | |
2592 | int rc, now; | |
2593 | ||
2594 | now = -addr & ~PAGE_MASK; | |
2595 | rc = emulator_write_emulated_onepage(addr, val, now, vcpu); | |
2596 | if (rc != X86EMUL_CONTINUE) | |
2597 | return rc; | |
2598 | addr += now; | |
2599 | val += now; | |
2600 | bytes -= now; | |
2601 | } | |
2602 | return emulator_write_emulated_onepage(addr, val, bytes, vcpu); | |
2603 | } | |
2604 | EXPORT_SYMBOL_GPL(emulator_write_emulated); | |
2605 | ||
2606 | static int emulator_cmpxchg_emulated(unsigned long addr, | |
2607 | const void *old, | |
2608 | const void *new, | |
2609 | unsigned int bytes, | |
2610 | struct kvm_vcpu *vcpu) | |
2611 | { | |
2612 | static int reported; | |
2613 | ||
2614 | if (!reported) { | |
2615 | reported = 1; | |
2616 | printk(KERN_WARNING "kvm: emulating exchange as write\n"); | |
2617 | } | |
2bacc55c MT |
2618 | #ifndef CONFIG_X86_64 |
2619 | /* guests cmpxchg8b have to be emulated atomically */ | |
2620 | if (bytes == 8) { | |
10589a46 | 2621 | gpa_t gpa; |
2bacc55c | 2622 | struct page *page; |
c0b49b0d | 2623 | char *kaddr; |
2bacc55c MT |
2624 | u64 val; |
2625 | ||
10589a46 MT |
2626 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
2627 | ||
2bacc55c MT |
2628 | if (gpa == UNMAPPED_GVA || |
2629 | (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
2630 | goto emul_write; | |
2631 | ||
2632 | if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK)) | |
2633 | goto emul_write; | |
2634 | ||
2635 | val = *(u64 *)new; | |
72dc67a6 | 2636 | |
2bacc55c | 2637 | page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT); |
72dc67a6 | 2638 | |
c0b49b0d AM |
2639 | kaddr = kmap_atomic(page, KM_USER0); |
2640 | set_64bit((u64 *)(kaddr + offset_in_page(gpa)), val); | |
2641 | kunmap_atomic(kaddr, KM_USER0); | |
2bacc55c MT |
2642 | kvm_release_page_dirty(page); |
2643 | } | |
3200f405 | 2644 | emul_write: |
2bacc55c MT |
2645 | #endif |
2646 | ||
bbd9b64e CO |
2647 | return emulator_write_emulated(addr, new, bytes, vcpu); |
2648 | } | |
2649 | ||
2650 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) | |
2651 | { | |
2652 | return kvm_x86_ops->get_segment_base(vcpu, seg); | |
2653 | } | |
2654 | ||
2655 | int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address) | |
2656 | { | |
a7052897 | 2657 | kvm_mmu_invlpg(vcpu, address); |
bbd9b64e CO |
2658 | return X86EMUL_CONTINUE; |
2659 | } | |
2660 | ||
2661 | int emulate_clts(struct kvm_vcpu *vcpu) | |
2662 | { | |
ad312c7c | 2663 | kvm_x86_ops->set_cr0(vcpu, vcpu->arch.cr0 & ~X86_CR0_TS); |
bbd9b64e CO |
2664 | return X86EMUL_CONTINUE; |
2665 | } | |
2666 | ||
2667 | int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest) | |
2668 | { | |
2669 | struct kvm_vcpu *vcpu = ctxt->vcpu; | |
2670 | ||
2671 | switch (dr) { | |
2672 | case 0 ... 3: | |
2673 | *dest = kvm_x86_ops->get_dr(vcpu, dr); | |
2674 | return X86EMUL_CONTINUE; | |
2675 | default: | |
b8688d51 | 2676 | pr_unimpl(vcpu, "%s: unexpected dr %u\n", __func__, dr); |
bbd9b64e CO |
2677 | return X86EMUL_UNHANDLEABLE; |
2678 | } | |
2679 | } | |
2680 | ||
2681 | int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value) | |
2682 | { | |
2683 | unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U; | |
2684 | int exception; | |
2685 | ||
2686 | kvm_x86_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception); | |
2687 | if (exception) { | |
2688 | /* FIXME: better handling */ | |
2689 | return X86EMUL_UNHANDLEABLE; | |
2690 | } | |
2691 | return X86EMUL_CONTINUE; | |
2692 | } | |
2693 | ||
2694 | void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context) | |
2695 | { | |
bbd9b64e | 2696 | u8 opcodes[4]; |
5fdbf976 | 2697 | unsigned long rip = kvm_rip_read(vcpu); |
bbd9b64e CO |
2698 | unsigned long rip_linear; |
2699 | ||
f76c710d | 2700 | if (!printk_ratelimit()) |
bbd9b64e CO |
2701 | return; |
2702 | ||
25be4608 GC |
2703 | rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS); |
2704 | ||
77c2002e | 2705 | kvm_read_guest_virt(rip_linear, (void *)opcodes, 4, vcpu); |
bbd9b64e CO |
2706 | |
2707 | printk(KERN_ERR "emulation failed (%s) rip %lx %02x %02x %02x %02x\n", | |
2708 | context, rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]); | |
bbd9b64e CO |
2709 | } |
2710 | EXPORT_SYMBOL_GPL(kvm_report_emulation_failure); | |
2711 | ||
14af3f3c | 2712 | static struct x86_emulate_ops emulate_ops = { |
77c2002e | 2713 | .read_std = kvm_read_guest_virt, |
bbd9b64e CO |
2714 | .read_emulated = emulator_read_emulated, |
2715 | .write_emulated = emulator_write_emulated, | |
2716 | .cmpxchg_emulated = emulator_cmpxchg_emulated, | |
2717 | }; | |
2718 | ||
5fdbf976 MT |
2719 | static void cache_all_regs(struct kvm_vcpu *vcpu) |
2720 | { | |
2721 | kvm_register_read(vcpu, VCPU_REGS_RAX); | |
2722 | kvm_register_read(vcpu, VCPU_REGS_RSP); | |
2723 | kvm_register_read(vcpu, VCPU_REGS_RIP); | |
2724 | vcpu->arch.regs_dirty = ~0; | |
2725 | } | |
2726 | ||
bbd9b64e CO |
2727 | int emulate_instruction(struct kvm_vcpu *vcpu, |
2728 | struct kvm_run *run, | |
2729 | unsigned long cr2, | |
2730 | u16 error_code, | |
571008da | 2731 | int emulation_type) |
bbd9b64e | 2732 | { |
310b5d30 | 2733 | int r, shadow_mask; |
571008da | 2734 | struct decode_cache *c; |
bbd9b64e | 2735 | |
26eef70c | 2736 | kvm_clear_exception_queue(vcpu); |
ad312c7c | 2737 | vcpu->arch.mmio_fault_cr2 = cr2; |
5fdbf976 MT |
2738 | /* |
2739 | * TODO: fix x86_emulate.c to use guest_read/write_register | |
2740 | * instead of direct ->regs accesses, can save hundred cycles | |
2741 | * on Intel for instructions that don't read/change RSP, for | |
2742 | * for example. | |
2743 | */ | |
2744 | cache_all_regs(vcpu); | |
bbd9b64e CO |
2745 | |
2746 | vcpu->mmio_is_write = 0; | |
ad312c7c | 2747 | vcpu->arch.pio.string = 0; |
bbd9b64e | 2748 | |
571008da | 2749 | if (!(emulation_type & EMULTYPE_NO_DECODE)) { |
bbd9b64e CO |
2750 | int cs_db, cs_l; |
2751 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
2752 | ||
ad312c7c ZX |
2753 | vcpu->arch.emulate_ctxt.vcpu = vcpu; |
2754 | vcpu->arch.emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu); | |
2755 | vcpu->arch.emulate_ctxt.mode = | |
2756 | (vcpu->arch.emulate_ctxt.eflags & X86_EFLAGS_VM) | |
bbd9b64e CO |
2757 | ? X86EMUL_MODE_REAL : cs_l |
2758 | ? X86EMUL_MODE_PROT64 : cs_db | |
2759 | ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16; | |
2760 | ||
ad312c7c | 2761 | r = x86_decode_insn(&vcpu->arch.emulate_ctxt, &emulate_ops); |
571008da | 2762 | |
0cb5762e AP |
2763 | /* Only allow emulation of specific instructions on #UD |
2764 | * (namely VMMCALL, sysenter, sysexit, syscall)*/ | |
571008da | 2765 | c = &vcpu->arch.emulate_ctxt.decode; |
0cb5762e AP |
2766 | if (emulation_type & EMULTYPE_TRAP_UD) { |
2767 | if (!c->twobyte) | |
2768 | return EMULATE_FAIL; | |
2769 | switch (c->b) { | |
2770 | case 0x01: /* VMMCALL */ | |
2771 | if (c->modrm_mod != 3 || c->modrm_rm != 1) | |
2772 | return EMULATE_FAIL; | |
2773 | break; | |
2774 | case 0x34: /* sysenter */ | |
2775 | case 0x35: /* sysexit */ | |
2776 | if (c->modrm_mod != 0 || c->modrm_rm != 0) | |
2777 | return EMULATE_FAIL; | |
2778 | break; | |
2779 | case 0x05: /* syscall */ | |
2780 | if (c->modrm_mod != 0 || c->modrm_rm != 0) | |
2781 | return EMULATE_FAIL; | |
2782 | break; | |
2783 | default: | |
2784 | return EMULATE_FAIL; | |
2785 | } | |
2786 | ||
2787 | if (!(c->modrm_reg == 0 || c->modrm_reg == 3)) | |
2788 | return EMULATE_FAIL; | |
2789 | } | |
571008da | 2790 | |
f2b5756b | 2791 | ++vcpu->stat.insn_emulation; |
bbd9b64e | 2792 | if (r) { |
f2b5756b | 2793 | ++vcpu->stat.insn_emulation_fail; |
bbd9b64e CO |
2794 | if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) |
2795 | return EMULATE_DONE; | |
2796 | return EMULATE_FAIL; | |
2797 | } | |
2798 | } | |
2799 | ||
ba8afb6b GN |
2800 | if (emulation_type & EMULTYPE_SKIP) { |
2801 | kvm_rip_write(vcpu, vcpu->arch.emulate_ctxt.decode.eip); | |
2802 | return EMULATE_DONE; | |
2803 | } | |
2804 | ||
ad312c7c | 2805 | r = x86_emulate_insn(&vcpu->arch.emulate_ctxt, &emulate_ops); |
310b5d30 GC |
2806 | shadow_mask = vcpu->arch.emulate_ctxt.interruptibility; |
2807 | ||
2808 | if (r == 0) | |
2809 | kvm_x86_ops->set_interrupt_shadow(vcpu, shadow_mask); | |
bbd9b64e | 2810 | |
ad312c7c | 2811 | if (vcpu->arch.pio.string) |
bbd9b64e CO |
2812 | return EMULATE_DO_MMIO; |
2813 | ||
2814 | if ((r || vcpu->mmio_is_write) && run) { | |
2815 | run->exit_reason = KVM_EXIT_MMIO; | |
2816 | run->mmio.phys_addr = vcpu->mmio_phys_addr; | |
2817 | memcpy(run->mmio.data, vcpu->mmio_data, 8); | |
2818 | run->mmio.len = vcpu->mmio_size; | |
2819 | run->mmio.is_write = vcpu->mmio_is_write; | |
2820 | } | |
2821 | ||
2822 | if (r) { | |
2823 | if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) | |
2824 | return EMULATE_DONE; | |
2825 | if (!vcpu->mmio_needed) { | |
2826 | kvm_report_emulation_failure(vcpu, "mmio"); | |
2827 | return EMULATE_FAIL; | |
2828 | } | |
2829 | return EMULATE_DO_MMIO; | |
2830 | } | |
2831 | ||
ad312c7c | 2832 | kvm_x86_ops->set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags); |
bbd9b64e CO |
2833 | |
2834 | if (vcpu->mmio_is_write) { | |
2835 | vcpu->mmio_needed = 0; | |
2836 | return EMULATE_DO_MMIO; | |
2837 | } | |
2838 | ||
2839 | return EMULATE_DONE; | |
2840 | } | |
2841 | EXPORT_SYMBOL_GPL(emulate_instruction); | |
2842 | ||
de7d789a CO |
2843 | static int pio_copy_data(struct kvm_vcpu *vcpu) |
2844 | { | |
ad312c7c | 2845 | void *p = vcpu->arch.pio_data; |
0f346074 | 2846 | gva_t q = vcpu->arch.pio.guest_gva; |
de7d789a | 2847 | unsigned bytes; |
0f346074 | 2848 | int ret; |
de7d789a | 2849 | |
ad312c7c ZX |
2850 | bytes = vcpu->arch.pio.size * vcpu->arch.pio.cur_count; |
2851 | if (vcpu->arch.pio.in) | |
0f346074 | 2852 | ret = kvm_write_guest_virt(q, p, bytes, vcpu); |
de7d789a | 2853 | else |
0f346074 IE |
2854 | ret = kvm_read_guest_virt(q, p, bytes, vcpu); |
2855 | return ret; | |
de7d789a CO |
2856 | } |
2857 | ||
2858 | int complete_pio(struct kvm_vcpu *vcpu) | |
2859 | { | |
ad312c7c | 2860 | struct kvm_pio_request *io = &vcpu->arch.pio; |
de7d789a CO |
2861 | long delta; |
2862 | int r; | |
5fdbf976 | 2863 | unsigned long val; |
de7d789a CO |
2864 | |
2865 | if (!io->string) { | |
5fdbf976 MT |
2866 | if (io->in) { |
2867 | val = kvm_register_read(vcpu, VCPU_REGS_RAX); | |
2868 | memcpy(&val, vcpu->arch.pio_data, io->size); | |
2869 | kvm_register_write(vcpu, VCPU_REGS_RAX, val); | |
2870 | } | |
de7d789a CO |
2871 | } else { |
2872 | if (io->in) { | |
2873 | r = pio_copy_data(vcpu); | |
5fdbf976 | 2874 | if (r) |
de7d789a | 2875 | return r; |
de7d789a CO |
2876 | } |
2877 | ||
2878 | delta = 1; | |
2879 | if (io->rep) { | |
2880 | delta *= io->cur_count; | |
2881 | /* | |
2882 | * The size of the register should really depend on | |
2883 | * current address size. | |
2884 | */ | |
5fdbf976 MT |
2885 | val = kvm_register_read(vcpu, VCPU_REGS_RCX); |
2886 | val -= delta; | |
2887 | kvm_register_write(vcpu, VCPU_REGS_RCX, val); | |
de7d789a CO |
2888 | } |
2889 | if (io->down) | |
2890 | delta = -delta; | |
2891 | delta *= io->size; | |
5fdbf976 MT |
2892 | if (io->in) { |
2893 | val = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
2894 | val += delta; | |
2895 | kvm_register_write(vcpu, VCPU_REGS_RDI, val); | |
2896 | } else { | |
2897 | val = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
2898 | val += delta; | |
2899 | kvm_register_write(vcpu, VCPU_REGS_RSI, val); | |
2900 | } | |
de7d789a CO |
2901 | } |
2902 | ||
de7d789a CO |
2903 | io->count -= io->cur_count; |
2904 | io->cur_count = 0; | |
2905 | ||
2906 | return 0; | |
2907 | } | |
2908 | ||
bda9020e | 2909 | static int kernel_pio(struct kvm_vcpu *vcpu, void *pd) |
de7d789a CO |
2910 | { |
2911 | /* TODO: String I/O for in kernel device */ | |
bda9020e | 2912 | int r; |
de7d789a | 2913 | |
ad312c7c | 2914 | if (vcpu->arch.pio.in) |
bda9020e MT |
2915 | r = kvm_io_bus_read(&vcpu->kvm->pio_bus, vcpu->arch.pio.port, |
2916 | vcpu->arch.pio.size, pd); | |
de7d789a | 2917 | else |
bda9020e MT |
2918 | r = kvm_io_bus_write(&vcpu->kvm->pio_bus, vcpu->arch.pio.port, |
2919 | vcpu->arch.pio.size, pd); | |
2920 | return r; | |
de7d789a CO |
2921 | } |
2922 | ||
bda9020e | 2923 | static int pio_string_write(struct kvm_vcpu *vcpu) |
de7d789a | 2924 | { |
ad312c7c ZX |
2925 | struct kvm_pio_request *io = &vcpu->arch.pio; |
2926 | void *pd = vcpu->arch.pio_data; | |
bda9020e | 2927 | int i, r = 0; |
de7d789a | 2928 | |
de7d789a | 2929 | for (i = 0; i < io->cur_count; i++) { |
bda9020e MT |
2930 | if (kvm_io_bus_write(&vcpu->kvm->pio_bus, |
2931 | io->port, io->size, pd)) { | |
2932 | r = -EOPNOTSUPP; | |
2933 | break; | |
2934 | } | |
de7d789a CO |
2935 | pd += io->size; |
2936 | } | |
bda9020e | 2937 | return r; |
de7d789a CO |
2938 | } |
2939 | ||
2940 | int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, | |
2941 | int size, unsigned port) | |
2942 | { | |
5fdbf976 | 2943 | unsigned long val; |
de7d789a CO |
2944 | |
2945 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
2946 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; | |
ad312c7c | 2947 | vcpu->run->io.size = vcpu->arch.pio.size = size; |
de7d789a | 2948 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; |
ad312c7c ZX |
2949 | vcpu->run->io.count = vcpu->arch.pio.count = vcpu->arch.pio.cur_count = 1; |
2950 | vcpu->run->io.port = vcpu->arch.pio.port = port; | |
2951 | vcpu->arch.pio.in = in; | |
2952 | vcpu->arch.pio.string = 0; | |
2953 | vcpu->arch.pio.down = 0; | |
ad312c7c | 2954 | vcpu->arch.pio.rep = 0; |
de7d789a | 2955 | |
229456fc MT |
2956 | trace_kvm_pio(vcpu->run->io.direction == KVM_EXIT_IO_OUT, port, |
2957 | size, 1); | |
2714d1d3 | 2958 | |
5fdbf976 MT |
2959 | val = kvm_register_read(vcpu, VCPU_REGS_RAX); |
2960 | memcpy(vcpu->arch.pio_data, &val, 4); | |
de7d789a | 2961 | |
bda9020e | 2962 | if (!kernel_pio(vcpu, vcpu->arch.pio_data)) { |
de7d789a CO |
2963 | complete_pio(vcpu); |
2964 | return 1; | |
2965 | } | |
2966 | return 0; | |
2967 | } | |
2968 | EXPORT_SYMBOL_GPL(kvm_emulate_pio); | |
2969 | ||
2970 | int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, | |
2971 | int size, unsigned long count, int down, | |
2972 | gva_t address, int rep, unsigned port) | |
2973 | { | |
2974 | unsigned now, in_page; | |
0f346074 | 2975 | int ret = 0; |
de7d789a CO |
2976 | |
2977 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
2978 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; | |
ad312c7c | 2979 | vcpu->run->io.size = vcpu->arch.pio.size = size; |
de7d789a | 2980 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; |
ad312c7c ZX |
2981 | vcpu->run->io.count = vcpu->arch.pio.count = vcpu->arch.pio.cur_count = count; |
2982 | vcpu->run->io.port = vcpu->arch.pio.port = port; | |
2983 | vcpu->arch.pio.in = in; | |
2984 | vcpu->arch.pio.string = 1; | |
2985 | vcpu->arch.pio.down = down; | |
ad312c7c | 2986 | vcpu->arch.pio.rep = rep; |
de7d789a | 2987 | |
229456fc MT |
2988 | trace_kvm_pio(vcpu->run->io.direction == KVM_EXIT_IO_OUT, port, |
2989 | size, count); | |
2714d1d3 | 2990 | |
de7d789a CO |
2991 | if (!count) { |
2992 | kvm_x86_ops->skip_emulated_instruction(vcpu); | |
2993 | return 1; | |
2994 | } | |
2995 | ||
2996 | if (!down) | |
2997 | in_page = PAGE_SIZE - offset_in_page(address); | |
2998 | else | |
2999 | in_page = offset_in_page(address) + size; | |
3000 | now = min(count, (unsigned long)in_page / size); | |
0f346074 | 3001 | if (!now) |
de7d789a | 3002 | now = 1; |
de7d789a CO |
3003 | if (down) { |
3004 | /* | |
3005 | * String I/O in reverse. Yuck. Kill the guest, fix later. | |
3006 | */ | |
3007 | pr_unimpl(vcpu, "guest string pio down\n"); | |
c1a5d4f9 | 3008 | kvm_inject_gp(vcpu, 0); |
de7d789a CO |
3009 | return 1; |
3010 | } | |
3011 | vcpu->run->io.count = now; | |
ad312c7c | 3012 | vcpu->arch.pio.cur_count = now; |
de7d789a | 3013 | |
ad312c7c | 3014 | if (vcpu->arch.pio.cur_count == vcpu->arch.pio.count) |
de7d789a CO |
3015 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
3016 | ||
0f346074 | 3017 | vcpu->arch.pio.guest_gva = address; |
de7d789a | 3018 | |
ad312c7c | 3019 | if (!vcpu->arch.pio.in) { |
de7d789a CO |
3020 | /* string PIO write */ |
3021 | ret = pio_copy_data(vcpu); | |
0f346074 IE |
3022 | if (ret == X86EMUL_PROPAGATE_FAULT) { |
3023 | kvm_inject_gp(vcpu, 0); | |
3024 | return 1; | |
3025 | } | |
bda9020e | 3026 | if (ret == 0 && !pio_string_write(vcpu)) { |
de7d789a | 3027 | complete_pio(vcpu); |
ad312c7c | 3028 | if (vcpu->arch.pio.count == 0) |
de7d789a CO |
3029 | ret = 1; |
3030 | } | |
bda9020e MT |
3031 | } |
3032 | /* no string PIO read support yet */ | |
de7d789a CO |
3033 | |
3034 | return ret; | |
3035 | } | |
3036 | EXPORT_SYMBOL_GPL(kvm_emulate_pio_string); | |
3037 | ||
c8076604 GH |
3038 | static void bounce_off(void *info) |
3039 | { | |
3040 | /* nothing */ | |
3041 | } | |
3042 | ||
3043 | static unsigned int ref_freq; | |
3044 | static unsigned long tsc_khz_ref; | |
3045 | ||
3046 | static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val, | |
3047 | void *data) | |
3048 | { | |
3049 | struct cpufreq_freqs *freq = data; | |
3050 | struct kvm *kvm; | |
3051 | struct kvm_vcpu *vcpu; | |
3052 | int i, send_ipi = 0; | |
3053 | ||
3054 | if (!ref_freq) | |
3055 | ref_freq = freq->old; | |
3056 | ||
3057 | if (val == CPUFREQ_PRECHANGE && freq->old > freq->new) | |
3058 | return 0; | |
3059 | if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new) | |
3060 | return 0; | |
3061 | per_cpu(cpu_tsc_khz, freq->cpu) = cpufreq_scale(tsc_khz_ref, ref_freq, freq->new); | |
3062 | ||
3063 | spin_lock(&kvm_lock); | |
3064 | list_for_each_entry(kvm, &vm_list, vm_list) { | |
988a2cae | 3065 | kvm_for_each_vcpu(i, vcpu, kvm) { |
c8076604 GH |
3066 | if (vcpu->cpu != freq->cpu) |
3067 | continue; | |
3068 | if (!kvm_request_guest_time_update(vcpu)) | |
3069 | continue; | |
3070 | if (vcpu->cpu != smp_processor_id()) | |
3071 | send_ipi++; | |
3072 | } | |
3073 | } | |
3074 | spin_unlock(&kvm_lock); | |
3075 | ||
3076 | if (freq->old < freq->new && send_ipi) { | |
3077 | /* | |
3078 | * We upscale the frequency. Must make the guest | |
3079 | * doesn't see old kvmclock values while running with | |
3080 | * the new frequency, otherwise we risk the guest sees | |
3081 | * time go backwards. | |
3082 | * | |
3083 | * In case we update the frequency for another cpu | |
3084 | * (which might be in guest context) send an interrupt | |
3085 | * to kick the cpu out of guest context. Next time | |
3086 | * guest context is entered kvmclock will be updated, | |
3087 | * so the guest will not see stale values. | |
3088 | */ | |
3089 | smp_call_function_single(freq->cpu, bounce_off, NULL, 1); | |
3090 | } | |
3091 | return 0; | |
3092 | } | |
3093 | ||
3094 | static struct notifier_block kvmclock_cpufreq_notifier_block = { | |
3095 | .notifier_call = kvmclock_cpufreq_notifier | |
3096 | }; | |
3097 | ||
f8c16bba | 3098 | int kvm_arch_init(void *opaque) |
043405e1 | 3099 | { |
c8076604 | 3100 | int r, cpu; |
f8c16bba ZX |
3101 | struct kvm_x86_ops *ops = (struct kvm_x86_ops *)opaque; |
3102 | ||
f8c16bba ZX |
3103 | if (kvm_x86_ops) { |
3104 | printk(KERN_ERR "kvm: already loaded the other module\n"); | |
56c6d28a ZX |
3105 | r = -EEXIST; |
3106 | goto out; | |
f8c16bba ZX |
3107 | } |
3108 | ||
3109 | if (!ops->cpu_has_kvm_support()) { | |
3110 | printk(KERN_ERR "kvm: no hardware support\n"); | |
56c6d28a ZX |
3111 | r = -EOPNOTSUPP; |
3112 | goto out; | |
f8c16bba ZX |
3113 | } |
3114 | if (ops->disabled_by_bios()) { | |
3115 | printk(KERN_ERR "kvm: disabled by bios\n"); | |
56c6d28a ZX |
3116 | r = -EOPNOTSUPP; |
3117 | goto out; | |
f8c16bba ZX |
3118 | } |
3119 | ||
97db56ce AK |
3120 | r = kvm_mmu_module_init(); |
3121 | if (r) | |
3122 | goto out; | |
3123 | ||
3124 | kvm_init_msr_list(); | |
3125 | ||
f8c16bba | 3126 | kvm_x86_ops = ops; |
56c6d28a | 3127 | kvm_mmu_set_nonpresent_ptes(0ull, 0ull); |
7b52345e SY |
3128 | kvm_mmu_set_base_ptes(PT_PRESENT_MASK); |
3129 | kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK, | |
4b12f0de | 3130 | PT_DIRTY_MASK, PT64_NX_MASK, 0); |
c8076604 GH |
3131 | |
3132 | for_each_possible_cpu(cpu) | |
3133 | per_cpu(cpu_tsc_khz, cpu) = tsc_khz; | |
3134 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) { | |
3135 | tsc_khz_ref = tsc_khz; | |
3136 | cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block, | |
3137 | CPUFREQ_TRANSITION_NOTIFIER); | |
3138 | } | |
3139 | ||
f8c16bba | 3140 | return 0; |
56c6d28a ZX |
3141 | |
3142 | out: | |
56c6d28a | 3143 | return r; |
043405e1 | 3144 | } |
8776e519 | 3145 | |
f8c16bba ZX |
3146 | void kvm_arch_exit(void) |
3147 | { | |
888d256e JK |
3148 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) |
3149 | cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block, | |
3150 | CPUFREQ_TRANSITION_NOTIFIER); | |
f8c16bba | 3151 | kvm_x86_ops = NULL; |
56c6d28a ZX |
3152 | kvm_mmu_module_exit(); |
3153 | } | |
f8c16bba | 3154 | |
8776e519 HB |
3155 | int kvm_emulate_halt(struct kvm_vcpu *vcpu) |
3156 | { | |
3157 | ++vcpu->stat.halt_exits; | |
3158 | if (irqchip_in_kernel(vcpu->kvm)) { | |
a4535290 | 3159 | vcpu->arch.mp_state = KVM_MP_STATE_HALTED; |
8776e519 HB |
3160 | return 1; |
3161 | } else { | |
3162 | vcpu->run->exit_reason = KVM_EXIT_HLT; | |
3163 | return 0; | |
3164 | } | |
3165 | } | |
3166 | EXPORT_SYMBOL_GPL(kvm_emulate_halt); | |
3167 | ||
2f333bcb MT |
3168 | static inline gpa_t hc_gpa(struct kvm_vcpu *vcpu, unsigned long a0, |
3169 | unsigned long a1) | |
3170 | { | |
3171 | if (is_long_mode(vcpu)) | |
3172 | return a0; | |
3173 | else | |
3174 | return a0 | ((gpa_t)a1 << 32); | |
3175 | } | |
3176 | ||
8776e519 HB |
3177 | int kvm_emulate_hypercall(struct kvm_vcpu *vcpu) |
3178 | { | |
3179 | unsigned long nr, a0, a1, a2, a3, ret; | |
2f333bcb | 3180 | int r = 1; |
8776e519 | 3181 | |
5fdbf976 MT |
3182 | nr = kvm_register_read(vcpu, VCPU_REGS_RAX); |
3183 | a0 = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
3184 | a1 = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
3185 | a2 = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
3186 | a3 = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
8776e519 | 3187 | |
229456fc | 3188 | trace_kvm_hypercall(nr, a0, a1, a2, a3); |
2714d1d3 | 3189 | |
8776e519 HB |
3190 | if (!is_long_mode(vcpu)) { |
3191 | nr &= 0xFFFFFFFF; | |
3192 | a0 &= 0xFFFFFFFF; | |
3193 | a1 &= 0xFFFFFFFF; | |
3194 | a2 &= 0xFFFFFFFF; | |
3195 | a3 &= 0xFFFFFFFF; | |
3196 | } | |
3197 | ||
3198 | switch (nr) { | |
b93463aa AK |
3199 | case KVM_HC_VAPIC_POLL_IRQ: |
3200 | ret = 0; | |
3201 | break; | |
2f333bcb MT |
3202 | case KVM_HC_MMU_OP: |
3203 | r = kvm_pv_mmu_op(vcpu, a0, hc_gpa(vcpu, a1, a2), &ret); | |
3204 | break; | |
8776e519 HB |
3205 | default: |
3206 | ret = -KVM_ENOSYS; | |
3207 | break; | |
3208 | } | |
5fdbf976 | 3209 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); |
f11c3a8d | 3210 | ++vcpu->stat.hypercalls; |
2f333bcb | 3211 | return r; |
8776e519 HB |
3212 | } |
3213 | EXPORT_SYMBOL_GPL(kvm_emulate_hypercall); | |
3214 | ||
3215 | int kvm_fix_hypercall(struct kvm_vcpu *vcpu) | |
3216 | { | |
3217 | char instruction[3]; | |
3218 | int ret = 0; | |
5fdbf976 | 3219 | unsigned long rip = kvm_rip_read(vcpu); |
8776e519 | 3220 | |
8776e519 HB |
3221 | |
3222 | /* | |
3223 | * Blow out the MMU to ensure that no other VCPU has an active mapping | |
3224 | * to ensure that the updated hypercall appears atomically across all | |
3225 | * VCPUs. | |
3226 | */ | |
3227 | kvm_mmu_zap_all(vcpu->kvm); | |
3228 | ||
8776e519 | 3229 | kvm_x86_ops->patch_hypercall(vcpu, instruction); |
5fdbf976 | 3230 | if (emulator_write_emulated(rip, instruction, 3, vcpu) |
8776e519 HB |
3231 | != X86EMUL_CONTINUE) |
3232 | ret = -EFAULT; | |
3233 | ||
8776e519 HB |
3234 | return ret; |
3235 | } | |
3236 | ||
3237 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) | |
3238 | { | |
3239 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; | |
3240 | } | |
3241 | ||
3242 | void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
3243 | { | |
3244 | struct descriptor_table dt = { limit, base }; | |
3245 | ||
3246 | kvm_x86_ops->set_gdt(vcpu, &dt); | |
3247 | } | |
3248 | ||
3249 | void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
3250 | { | |
3251 | struct descriptor_table dt = { limit, base }; | |
3252 | ||
3253 | kvm_x86_ops->set_idt(vcpu, &dt); | |
3254 | } | |
3255 | ||
3256 | void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw, | |
3257 | unsigned long *rflags) | |
3258 | { | |
2d3ad1f4 | 3259 | kvm_lmsw(vcpu, msw); |
8776e519 HB |
3260 | *rflags = kvm_x86_ops->get_rflags(vcpu); |
3261 | } | |
3262 | ||
3263 | unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr) | |
3264 | { | |
54e445ca JR |
3265 | unsigned long value; |
3266 | ||
8776e519 HB |
3267 | kvm_x86_ops->decache_cr4_guest_bits(vcpu); |
3268 | switch (cr) { | |
3269 | case 0: | |
54e445ca JR |
3270 | value = vcpu->arch.cr0; |
3271 | break; | |
8776e519 | 3272 | case 2: |
54e445ca JR |
3273 | value = vcpu->arch.cr2; |
3274 | break; | |
8776e519 | 3275 | case 3: |
54e445ca JR |
3276 | value = vcpu->arch.cr3; |
3277 | break; | |
8776e519 | 3278 | case 4: |
54e445ca JR |
3279 | value = vcpu->arch.cr4; |
3280 | break; | |
152ff9be | 3281 | case 8: |
54e445ca JR |
3282 | value = kvm_get_cr8(vcpu); |
3283 | break; | |
8776e519 | 3284 | default: |
b8688d51 | 3285 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr); |
8776e519 HB |
3286 | return 0; |
3287 | } | |
54e445ca JR |
3288 | |
3289 | return value; | |
8776e519 HB |
3290 | } |
3291 | ||
3292 | void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val, | |
3293 | unsigned long *rflags) | |
3294 | { | |
3295 | switch (cr) { | |
3296 | case 0: | |
2d3ad1f4 | 3297 | kvm_set_cr0(vcpu, mk_cr_64(vcpu->arch.cr0, val)); |
8776e519 HB |
3298 | *rflags = kvm_x86_ops->get_rflags(vcpu); |
3299 | break; | |
3300 | case 2: | |
ad312c7c | 3301 | vcpu->arch.cr2 = val; |
8776e519 HB |
3302 | break; |
3303 | case 3: | |
2d3ad1f4 | 3304 | kvm_set_cr3(vcpu, val); |
8776e519 HB |
3305 | break; |
3306 | case 4: | |
2d3ad1f4 | 3307 | kvm_set_cr4(vcpu, mk_cr_64(vcpu->arch.cr4, val)); |
8776e519 | 3308 | break; |
152ff9be | 3309 | case 8: |
2d3ad1f4 | 3310 | kvm_set_cr8(vcpu, val & 0xfUL); |
152ff9be | 3311 | break; |
8776e519 | 3312 | default: |
b8688d51 | 3313 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr); |
8776e519 HB |
3314 | } |
3315 | } | |
3316 | ||
07716717 DK |
3317 | static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu *vcpu, int i) |
3318 | { | |
ad312c7c ZX |
3319 | struct kvm_cpuid_entry2 *e = &vcpu->arch.cpuid_entries[i]; |
3320 | int j, nent = vcpu->arch.cpuid_nent; | |
07716717 DK |
3321 | |
3322 | e->flags &= ~KVM_CPUID_FLAG_STATE_READ_NEXT; | |
3323 | /* when no next entry is found, the current entry[i] is reselected */ | |
0fdf8e59 | 3324 | for (j = i + 1; ; j = (j + 1) % nent) { |
ad312c7c | 3325 | struct kvm_cpuid_entry2 *ej = &vcpu->arch.cpuid_entries[j]; |
07716717 DK |
3326 | if (ej->function == e->function) { |
3327 | ej->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT; | |
3328 | return j; | |
3329 | } | |
3330 | } | |
3331 | return 0; /* silence gcc, even though control never reaches here */ | |
3332 | } | |
3333 | ||
3334 | /* find an entry with matching function, matching index (if needed), and that | |
3335 | * should be read next (if it's stateful) */ | |
3336 | static int is_matching_cpuid_entry(struct kvm_cpuid_entry2 *e, | |
3337 | u32 function, u32 index) | |
3338 | { | |
3339 | if (e->function != function) | |
3340 | return 0; | |
3341 | if ((e->flags & KVM_CPUID_FLAG_SIGNIFCANT_INDEX) && e->index != index) | |
3342 | return 0; | |
3343 | if ((e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) && | |
19355475 | 3344 | !(e->flags & KVM_CPUID_FLAG_STATE_READ_NEXT)) |
07716717 DK |
3345 | return 0; |
3346 | return 1; | |
3347 | } | |
3348 | ||
d8017474 AG |
3349 | struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu, |
3350 | u32 function, u32 index) | |
8776e519 HB |
3351 | { |
3352 | int i; | |
d8017474 | 3353 | struct kvm_cpuid_entry2 *best = NULL; |
8776e519 | 3354 | |
ad312c7c | 3355 | for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { |
d8017474 AG |
3356 | struct kvm_cpuid_entry2 *e; |
3357 | ||
ad312c7c | 3358 | e = &vcpu->arch.cpuid_entries[i]; |
07716717 DK |
3359 | if (is_matching_cpuid_entry(e, function, index)) { |
3360 | if (e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) | |
3361 | move_to_next_stateful_cpuid_entry(vcpu, i); | |
8776e519 HB |
3362 | best = e; |
3363 | break; | |
3364 | } | |
3365 | /* | |
3366 | * Both basic or both extended? | |
3367 | */ | |
3368 | if (((e->function ^ function) & 0x80000000) == 0) | |
3369 | if (!best || e->function > best->function) | |
3370 | best = e; | |
3371 | } | |
d8017474 AG |
3372 | return best; |
3373 | } | |
3374 | ||
82725b20 DE |
3375 | int cpuid_maxphyaddr(struct kvm_vcpu *vcpu) |
3376 | { | |
3377 | struct kvm_cpuid_entry2 *best; | |
3378 | ||
3379 | best = kvm_find_cpuid_entry(vcpu, 0x80000008, 0); | |
3380 | if (best) | |
3381 | return best->eax & 0xff; | |
3382 | return 36; | |
3383 | } | |
3384 | ||
d8017474 AG |
3385 | void kvm_emulate_cpuid(struct kvm_vcpu *vcpu) |
3386 | { | |
3387 | u32 function, index; | |
3388 | struct kvm_cpuid_entry2 *best; | |
3389 | ||
3390 | function = kvm_register_read(vcpu, VCPU_REGS_RAX); | |
3391 | index = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
3392 | kvm_register_write(vcpu, VCPU_REGS_RAX, 0); | |
3393 | kvm_register_write(vcpu, VCPU_REGS_RBX, 0); | |
3394 | kvm_register_write(vcpu, VCPU_REGS_RCX, 0); | |
3395 | kvm_register_write(vcpu, VCPU_REGS_RDX, 0); | |
3396 | best = kvm_find_cpuid_entry(vcpu, function, index); | |
8776e519 | 3397 | if (best) { |
5fdbf976 MT |
3398 | kvm_register_write(vcpu, VCPU_REGS_RAX, best->eax); |
3399 | kvm_register_write(vcpu, VCPU_REGS_RBX, best->ebx); | |
3400 | kvm_register_write(vcpu, VCPU_REGS_RCX, best->ecx); | |
3401 | kvm_register_write(vcpu, VCPU_REGS_RDX, best->edx); | |
8776e519 | 3402 | } |
8776e519 | 3403 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
229456fc MT |
3404 | trace_kvm_cpuid(function, |
3405 | kvm_register_read(vcpu, VCPU_REGS_RAX), | |
3406 | kvm_register_read(vcpu, VCPU_REGS_RBX), | |
3407 | kvm_register_read(vcpu, VCPU_REGS_RCX), | |
3408 | kvm_register_read(vcpu, VCPU_REGS_RDX)); | |
8776e519 HB |
3409 | } |
3410 | EXPORT_SYMBOL_GPL(kvm_emulate_cpuid); | |
d0752060 | 3411 | |
b6c7a5dc HB |
3412 | /* |
3413 | * Check if userspace requested an interrupt window, and that the | |
3414 | * interrupt window is open. | |
3415 | * | |
3416 | * No need to exit to userspace if we already have an interrupt queued. | |
3417 | */ | |
3418 | static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu, | |
3419 | struct kvm_run *kvm_run) | |
3420 | { | |
8061823a | 3421 | return (!irqchip_in_kernel(vcpu->kvm) && !kvm_cpu_has_interrupt(vcpu) && |
b6c7a5dc | 3422 | kvm_run->request_interrupt_window && |
5df56646 | 3423 | kvm_arch_interrupt_allowed(vcpu)); |
b6c7a5dc HB |
3424 | } |
3425 | ||
3426 | static void post_kvm_run_save(struct kvm_vcpu *vcpu, | |
3427 | struct kvm_run *kvm_run) | |
3428 | { | |
3429 | kvm_run->if_flag = (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF) != 0; | |
2d3ad1f4 | 3430 | kvm_run->cr8 = kvm_get_cr8(vcpu); |
b6c7a5dc | 3431 | kvm_run->apic_base = kvm_get_apic_base(vcpu); |
4531220b | 3432 | if (irqchip_in_kernel(vcpu->kvm)) |
b6c7a5dc | 3433 | kvm_run->ready_for_interrupt_injection = 1; |
4531220b | 3434 | else |
b6c7a5dc | 3435 | kvm_run->ready_for_interrupt_injection = |
fa9726b0 GN |
3436 | kvm_arch_interrupt_allowed(vcpu) && |
3437 | !kvm_cpu_has_interrupt(vcpu) && | |
3438 | !kvm_event_needs_reinjection(vcpu); | |
b6c7a5dc HB |
3439 | } |
3440 | ||
b93463aa AK |
3441 | static void vapic_enter(struct kvm_vcpu *vcpu) |
3442 | { | |
3443 | struct kvm_lapic *apic = vcpu->arch.apic; | |
3444 | struct page *page; | |
3445 | ||
3446 | if (!apic || !apic->vapic_addr) | |
3447 | return; | |
3448 | ||
3449 | page = gfn_to_page(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); | |
72dc67a6 IE |
3450 | |
3451 | vcpu->arch.apic->vapic_page = page; | |
b93463aa AK |
3452 | } |
3453 | ||
3454 | static void vapic_exit(struct kvm_vcpu *vcpu) | |
3455 | { | |
3456 | struct kvm_lapic *apic = vcpu->arch.apic; | |
3457 | ||
3458 | if (!apic || !apic->vapic_addr) | |
3459 | return; | |
3460 | ||
f8b78fa3 | 3461 | down_read(&vcpu->kvm->slots_lock); |
b93463aa AK |
3462 | kvm_release_page_dirty(apic->vapic_page); |
3463 | mark_page_dirty(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); | |
f8b78fa3 | 3464 | up_read(&vcpu->kvm->slots_lock); |
b93463aa AK |
3465 | } |
3466 | ||
95ba8273 GN |
3467 | static void update_cr8_intercept(struct kvm_vcpu *vcpu) |
3468 | { | |
3469 | int max_irr, tpr; | |
3470 | ||
3471 | if (!kvm_x86_ops->update_cr8_intercept) | |
3472 | return; | |
3473 | ||
8db3baa2 GN |
3474 | if (!vcpu->arch.apic->vapic_addr) |
3475 | max_irr = kvm_lapic_find_highest_irr(vcpu); | |
3476 | else | |
3477 | max_irr = -1; | |
95ba8273 GN |
3478 | |
3479 | if (max_irr != -1) | |
3480 | max_irr >>= 4; | |
3481 | ||
3482 | tpr = kvm_lapic_get_cr8(vcpu); | |
3483 | ||
3484 | kvm_x86_ops->update_cr8_intercept(vcpu, tpr, max_irr); | |
3485 | } | |
3486 | ||
b59bb7bd | 3487 | static void inject_pending_event(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
95ba8273 GN |
3488 | { |
3489 | /* try to reinject previous events if any */ | |
b59bb7bd GN |
3490 | if (vcpu->arch.exception.pending) { |
3491 | kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr, | |
3492 | vcpu->arch.exception.has_error_code, | |
3493 | vcpu->arch.exception.error_code); | |
3494 | return; | |
3495 | } | |
3496 | ||
95ba8273 GN |
3497 | if (vcpu->arch.nmi_injected) { |
3498 | kvm_x86_ops->set_nmi(vcpu); | |
3499 | return; | |
3500 | } | |
3501 | ||
3502 | if (vcpu->arch.interrupt.pending) { | |
66fd3f7f | 3503 | kvm_x86_ops->set_irq(vcpu); |
95ba8273 GN |
3504 | return; |
3505 | } | |
3506 | ||
3507 | /* try to inject new event if pending */ | |
3508 | if (vcpu->arch.nmi_pending) { | |
3509 | if (kvm_x86_ops->nmi_allowed(vcpu)) { | |
3510 | vcpu->arch.nmi_pending = false; | |
3511 | vcpu->arch.nmi_injected = true; | |
3512 | kvm_x86_ops->set_nmi(vcpu); | |
3513 | } | |
3514 | } else if (kvm_cpu_has_interrupt(vcpu)) { | |
3515 | if (kvm_x86_ops->interrupt_allowed(vcpu)) { | |
66fd3f7f GN |
3516 | kvm_queue_interrupt(vcpu, kvm_cpu_get_interrupt(vcpu), |
3517 | false); | |
3518 | kvm_x86_ops->set_irq(vcpu); | |
95ba8273 GN |
3519 | } |
3520 | } | |
3521 | } | |
3522 | ||
d7690175 | 3523 | static int vcpu_enter_guest(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
b6c7a5dc HB |
3524 | { |
3525 | int r; | |
6a8b1d13 GN |
3526 | bool req_int_win = !irqchip_in_kernel(vcpu->kvm) && |
3527 | kvm_run->request_interrupt_window; | |
b6c7a5dc | 3528 | |
2e53d63a MT |
3529 | if (vcpu->requests) |
3530 | if (test_and_clear_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests)) | |
3531 | kvm_mmu_unload(vcpu); | |
3532 | ||
b6c7a5dc HB |
3533 | r = kvm_mmu_reload(vcpu); |
3534 | if (unlikely(r)) | |
3535 | goto out; | |
3536 | ||
2f52d58c AK |
3537 | if (vcpu->requests) { |
3538 | if (test_and_clear_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests)) | |
2f599714 | 3539 | __kvm_migrate_timers(vcpu); |
c8076604 GH |
3540 | if (test_and_clear_bit(KVM_REQ_KVMCLOCK_UPDATE, &vcpu->requests)) |
3541 | kvm_write_guest_time(vcpu); | |
4731d4c7 MT |
3542 | if (test_and_clear_bit(KVM_REQ_MMU_SYNC, &vcpu->requests)) |
3543 | kvm_mmu_sync_roots(vcpu); | |
d4acf7e7 MT |
3544 | if (test_and_clear_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests)) |
3545 | kvm_x86_ops->tlb_flush(vcpu); | |
b93463aa AK |
3546 | if (test_and_clear_bit(KVM_REQ_REPORT_TPR_ACCESS, |
3547 | &vcpu->requests)) { | |
3548 | kvm_run->exit_reason = KVM_EXIT_TPR_ACCESS; | |
3549 | r = 0; | |
3550 | goto out; | |
3551 | } | |
71c4dfaf JR |
3552 | if (test_and_clear_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests)) { |
3553 | kvm_run->exit_reason = KVM_EXIT_SHUTDOWN; | |
3554 | r = 0; | |
3555 | goto out; | |
3556 | } | |
2f52d58c | 3557 | } |
b93463aa | 3558 | |
b6c7a5dc HB |
3559 | preempt_disable(); |
3560 | ||
3561 | kvm_x86_ops->prepare_guest_switch(vcpu); | |
3562 | kvm_load_guest_fpu(vcpu); | |
3563 | ||
3564 | local_irq_disable(); | |
3565 | ||
32f88400 MT |
3566 | clear_bit(KVM_REQ_KICK, &vcpu->requests); |
3567 | smp_mb__after_clear_bit(); | |
3568 | ||
d7690175 | 3569 | if (vcpu->requests || need_resched() || signal_pending(current)) { |
c7f0f24b | 3570 | set_bit(KVM_REQ_KICK, &vcpu->requests); |
6c142801 AK |
3571 | local_irq_enable(); |
3572 | preempt_enable(); | |
3573 | r = 1; | |
3574 | goto out; | |
3575 | } | |
3576 | ||
b59bb7bd | 3577 | inject_pending_event(vcpu, kvm_run); |
b6c7a5dc | 3578 | |
6a8b1d13 GN |
3579 | /* enable NMI/IRQ window open exits if needed */ |
3580 | if (vcpu->arch.nmi_pending) | |
3581 | kvm_x86_ops->enable_nmi_window(vcpu); | |
3582 | else if (kvm_cpu_has_interrupt(vcpu) || req_int_win) | |
3583 | kvm_x86_ops->enable_irq_window(vcpu); | |
3584 | ||
95ba8273 | 3585 | if (kvm_lapic_enabled(vcpu)) { |
8db3baa2 GN |
3586 | update_cr8_intercept(vcpu); |
3587 | kvm_lapic_sync_to_vapic(vcpu); | |
95ba8273 | 3588 | } |
b93463aa | 3589 | |
3200f405 MT |
3590 | up_read(&vcpu->kvm->slots_lock); |
3591 | ||
b6c7a5dc HB |
3592 | kvm_guest_enter(); |
3593 | ||
42dbaa5a JK |
3594 | get_debugreg(vcpu->arch.host_dr6, 6); |
3595 | get_debugreg(vcpu->arch.host_dr7, 7); | |
3596 | if (unlikely(vcpu->arch.switch_db_regs)) { | |
3597 | get_debugreg(vcpu->arch.host_db[0], 0); | |
3598 | get_debugreg(vcpu->arch.host_db[1], 1); | |
3599 | get_debugreg(vcpu->arch.host_db[2], 2); | |
3600 | get_debugreg(vcpu->arch.host_db[3], 3); | |
3601 | ||
3602 | set_debugreg(0, 7); | |
3603 | set_debugreg(vcpu->arch.eff_db[0], 0); | |
3604 | set_debugreg(vcpu->arch.eff_db[1], 1); | |
3605 | set_debugreg(vcpu->arch.eff_db[2], 2); | |
3606 | set_debugreg(vcpu->arch.eff_db[3], 3); | |
3607 | } | |
b6c7a5dc | 3608 | |
229456fc | 3609 | trace_kvm_entry(vcpu->vcpu_id); |
b6c7a5dc HB |
3610 | kvm_x86_ops->run(vcpu, kvm_run); |
3611 | ||
42dbaa5a JK |
3612 | if (unlikely(vcpu->arch.switch_db_regs)) { |
3613 | set_debugreg(0, 7); | |
3614 | set_debugreg(vcpu->arch.host_db[0], 0); | |
3615 | set_debugreg(vcpu->arch.host_db[1], 1); | |
3616 | set_debugreg(vcpu->arch.host_db[2], 2); | |
3617 | set_debugreg(vcpu->arch.host_db[3], 3); | |
3618 | } | |
3619 | set_debugreg(vcpu->arch.host_dr6, 6); | |
3620 | set_debugreg(vcpu->arch.host_dr7, 7); | |
3621 | ||
32f88400 | 3622 | set_bit(KVM_REQ_KICK, &vcpu->requests); |
b6c7a5dc HB |
3623 | local_irq_enable(); |
3624 | ||
3625 | ++vcpu->stat.exits; | |
3626 | ||
3627 | /* | |
3628 | * We must have an instruction between local_irq_enable() and | |
3629 | * kvm_guest_exit(), so the timer interrupt isn't delayed by | |
3630 | * the interrupt shadow. The stat.exits increment will do nicely. | |
3631 | * But we need to prevent reordering, hence this barrier(): | |
3632 | */ | |
3633 | barrier(); | |
3634 | ||
3635 | kvm_guest_exit(); | |
3636 | ||
3637 | preempt_enable(); | |
3638 | ||
3200f405 MT |
3639 | down_read(&vcpu->kvm->slots_lock); |
3640 | ||
b6c7a5dc HB |
3641 | /* |
3642 | * Profile KVM exit RIPs: | |
3643 | */ | |
3644 | if (unlikely(prof_on == KVM_PROFILING)) { | |
5fdbf976 MT |
3645 | unsigned long rip = kvm_rip_read(vcpu); |
3646 | profile_hit(KVM_PROFILING, (void *)rip); | |
b6c7a5dc HB |
3647 | } |
3648 | ||
298101da | 3649 | |
b93463aa AK |
3650 | kvm_lapic_sync_from_vapic(vcpu); |
3651 | ||
b6c7a5dc | 3652 | r = kvm_x86_ops->handle_exit(kvm_run, vcpu); |
d7690175 MT |
3653 | out: |
3654 | return r; | |
3655 | } | |
b6c7a5dc | 3656 | |
09cec754 | 3657 | |
d7690175 MT |
3658 | static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
3659 | { | |
3660 | int r; | |
3661 | ||
3662 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED)) { | |
1b10bf31 JK |
3663 | pr_debug("vcpu %d received sipi with vector # %x\n", |
3664 | vcpu->vcpu_id, vcpu->arch.sipi_vector); | |
d7690175 | 3665 | kvm_lapic_reset(vcpu); |
5f179287 | 3666 | r = kvm_arch_vcpu_reset(vcpu); |
d7690175 MT |
3667 | if (r) |
3668 | return r; | |
3669 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; | |
b6c7a5dc HB |
3670 | } |
3671 | ||
d7690175 MT |
3672 | down_read(&vcpu->kvm->slots_lock); |
3673 | vapic_enter(vcpu); | |
3674 | ||
3675 | r = 1; | |
3676 | while (r > 0) { | |
af2152f5 | 3677 | if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE) |
d7690175 MT |
3678 | r = vcpu_enter_guest(vcpu, kvm_run); |
3679 | else { | |
3680 | up_read(&vcpu->kvm->slots_lock); | |
3681 | kvm_vcpu_block(vcpu); | |
3682 | down_read(&vcpu->kvm->slots_lock); | |
3683 | if (test_and_clear_bit(KVM_REQ_UNHALT, &vcpu->requests)) | |
09cec754 GN |
3684 | { |
3685 | switch(vcpu->arch.mp_state) { | |
3686 | case KVM_MP_STATE_HALTED: | |
d7690175 | 3687 | vcpu->arch.mp_state = |
09cec754 GN |
3688 | KVM_MP_STATE_RUNNABLE; |
3689 | case KVM_MP_STATE_RUNNABLE: | |
3690 | break; | |
3691 | case KVM_MP_STATE_SIPI_RECEIVED: | |
3692 | default: | |
3693 | r = -EINTR; | |
3694 | break; | |
3695 | } | |
3696 | } | |
d7690175 MT |
3697 | } |
3698 | ||
09cec754 GN |
3699 | if (r <= 0) |
3700 | break; | |
3701 | ||
3702 | clear_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests); | |
3703 | if (kvm_cpu_has_pending_timer(vcpu)) | |
3704 | kvm_inject_pending_timer_irqs(vcpu); | |
3705 | ||
3706 | if (dm_request_for_irq_injection(vcpu, kvm_run)) { | |
3707 | r = -EINTR; | |
3708 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
3709 | ++vcpu->stat.request_irq_exits; | |
3710 | } | |
3711 | if (signal_pending(current)) { | |
3712 | r = -EINTR; | |
3713 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
3714 | ++vcpu->stat.signal_exits; | |
3715 | } | |
3716 | if (need_resched()) { | |
3717 | up_read(&vcpu->kvm->slots_lock); | |
3718 | kvm_resched(vcpu); | |
3719 | down_read(&vcpu->kvm->slots_lock); | |
d7690175 | 3720 | } |
b6c7a5dc HB |
3721 | } |
3722 | ||
d7690175 | 3723 | up_read(&vcpu->kvm->slots_lock); |
b6c7a5dc HB |
3724 | post_kvm_run_save(vcpu, kvm_run); |
3725 | ||
b93463aa AK |
3726 | vapic_exit(vcpu); |
3727 | ||
b6c7a5dc HB |
3728 | return r; |
3729 | } | |
3730 | ||
3731 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
3732 | { | |
3733 | int r; | |
3734 | sigset_t sigsaved; | |
3735 | ||
3736 | vcpu_load(vcpu); | |
3737 | ||
ac9f6dc0 AK |
3738 | if (vcpu->sigset_active) |
3739 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
3740 | ||
a4535290 | 3741 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) { |
b6c7a5dc | 3742 | kvm_vcpu_block(vcpu); |
d7690175 | 3743 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); |
ac9f6dc0 AK |
3744 | r = -EAGAIN; |
3745 | goto out; | |
b6c7a5dc HB |
3746 | } |
3747 | ||
b6c7a5dc HB |
3748 | /* re-sync apic's tpr */ |
3749 | if (!irqchip_in_kernel(vcpu->kvm)) | |
2d3ad1f4 | 3750 | kvm_set_cr8(vcpu, kvm_run->cr8); |
b6c7a5dc | 3751 | |
ad312c7c | 3752 | if (vcpu->arch.pio.cur_count) { |
b6c7a5dc HB |
3753 | r = complete_pio(vcpu); |
3754 | if (r) | |
3755 | goto out; | |
3756 | } | |
3757 | #if CONFIG_HAS_IOMEM | |
3758 | if (vcpu->mmio_needed) { | |
3759 | memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8); | |
3760 | vcpu->mmio_read_completed = 1; | |
3761 | vcpu->mmio_needed = 0; | |
3200f405 MT |
3762 | |
3763 | down_read(&vcpu->kvm->slots_lock); | |
b6c7a5dc | 3764 | r = emulate_instruction(vcpu, kvm_run, |
571008da SY |
3765 | vcpu->arch.mmio_fault_cr2, 0, |
3766 | EMULTYPE_NO_DECODE); | |
3200f405 | 3767 | up_read(&vcpu->kvm->slots_lock); |
b6c7a5dc HB |
3768 | if (r == EMULATE_DO_MMIO) { |
3769 | /* | |
3770 | * Read-modify-write. Back to userspace. | |
3771 | */ | |
3772 | r = 0; | |
3773 | goto out; | |
3774 | } | |
3775 | } | |
3776 | #endif | |
5fdbf976 MT |
3777 | if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) |
3778 | kvm_register_write(vcpu, VCPU_REGS_RAX, | |
3779 | kvm_run->hypercall.ret); | |
b6c7a5dc HB |
3780 | |
3781 | r = __vcpu_run(vcpu, kvm_run); | |
3782 | ||
3783 | out: | |
3784 | if (vcpu->sigset_active) | |
3785 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
3786 | ||
3787 | vcpu_put(vcpu); | |
3788 | return r; | |
3789 | } | |
3790 | ||
3791 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
3792 | { | |
3793 | vcpu_load(vcpu); | |
3794 | ||
5fdbf976 MT |
3795 | regs->rax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
3796 | regs->rbx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
3797 | regs->rcx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
3798 | regs->rdx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
3799 | regs->rsi = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
3800 | regs->rdi = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
3801 | regs->rsp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
3802 | regs->rbp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
b6c7a5dc | 3803 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
3804 | regs->r8 = kvm_register_read(vcpu, VCPU_REGS_R8); |
3805 | regs->r9 = kvm_register_read(vcpu, VCPU_REGS_R9); | |
3806 | regs->r10 = kvm_register_read(vcpu, VCPU_REGS_R10); | |
3807 | regs->r11 = kvm_register_read(vcpu, VCPU_REGS_R11); | |
3808 | regs->r12 = kvm_register_read(vcpu, VCPU_REGS_R12); | |
3809 | regs->r13 = kvm_register_read(vcpu, VCPU_REGS_R13); | |
3810 | regs->r14 = kvm_register_read(vcpu, VCPU_REGS_R14); | |
3811 | regs->r15 = kvm_register_read(vcpu, VCPU_REGS_R15); | |
b6c7a5dc HB |
3812 | #endif |
3813 | ||
5fdbf976 | 3814 | regs->rip = kvm_rip_read(vcpu); |
b6c7a5dc HB |
3815 | regs->rflags = kvm_x86_ops->get_rflags(vcpu); |
3816 | ||
3817 | /* | |
3818 | * Don't leak debug flags in case they were set for guest debugging | |
3819 | */ | |
d0bfb940 | 3820 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) |
b6c7a5dc HB |
3821 | regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF); |
3822 | ||
3823 | vcpu_put(vcpu); | |
3824 | ||
3825 | return 0; | |
3826 | } | |
3827 | ||
3828 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
3829 | { | |
3830 | vcpu_load(vcpu); | |
3831 | ||
5fdbf976 MT |
3832 | kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax); |
3833 | kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx); | |
3834 | kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx); | |
3835 | kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx); | |
3836 | kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi); | |
3837 | kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi); | |
3838 | kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp); | |
3839 | kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp); | |
b6c7a5dc | 3840 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
3841 | kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8); |
3842 | kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9); | |
3843 | kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10); | |
3844 | kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11); | |
3845 | kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12); | |
3846 | kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13); | |
3847 | kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14); | |
3848 | kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15); | |
3849 | ||
b6c7a5dc HB |
3850 | #endif |
3851 | ||
5fdbf976 | 3852 | kvm_rip_write(vcpu, regs->rip); |
b6c7a5dc HB |
3853 | kvm_x86_ops->set_rflags(vcpu, regs->rflags); |
3854 | ||
b6c7a5dc | 3855 | |
b4f14abd JK |
3856 | vcpu->arch.exception.pending = false; |
3857 | ||
b6c7a5dc HB |
3858 | vcpu_put(vcpu); |
3859 | ||
3860 | return 0; | |
3861 | } | |
3862 | ||
3e6e0aab GT |
3863 | void kvm_get_segment(struct kvm_vcpu *vcpu, |
3864 | struct kvm_segment *var, int seg) | |
b6c7a5dc | 3865 | { |
14af3f3c | 3866 | kvm_x86_ops->get_segment(vcpu, var, seg); |
b6c7a5dc HB |
3867 | } |
3868 | ||
3869 | void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) | |
3870 | { | |
3871 | struct kvm_segment cs; | |
3872 | ||
3e6e0aab | 3873 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); |
b6c7a5dc HB |
3874 | *db = cs.db; |
3875 | *l = cs.l; | |
3876 | } | |
3877 | EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits); | |
3878 | ||
3879 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
3880 | struct kvm_sregs *sregs) | |
3881 | { | |
3882 | struct descriptor_table dt; | |
b6c7a5dc HB |
3883 | |
3884 | vcpu_load(vcpu); | |
3885 | ||
3e6e0aab GT |
3886 | kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
3887 | kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
3888 | kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
3889 | kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
3890 | kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
3891 | kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 3892 | |
3e6e0aab GT |
3893 | kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
3894 | kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc HB |
3895 | |
3896 | kvm_x86_ops->get_idt(vcpu, &dt); | |
3897 | sregs->idt.limit = dt.limit; | |
3898 | sregs->idt.base = dt.base; | |
3899 | kvm_x86_ops->get_gdt(vcpu, &dt); | |
3900 | sregs->gdt.limit = dt.limit; | |
3901 | sregs->gdt.base = dt.base; | |
3902 | ||
3903 | kvm_x86_ops->decache_cr4_guest_bits(vcpu); | |
ad312c7c ZX |
3904 | sregs->cr0 = vcpu->arch.cr0; |
3905 | sregs->cr2 = vcpu->arch.cr2; | |
3906 | sregs->cr3 = vcpu->arch.cr3; | |
3907 | sregs->cr4 = vcpu->arch.cr4; | |
2d3ad1f4 | 3908 | sregs->cr8 = kvm_get_cr8(vcpu); |
ad312c7c | 3909 | sregs->efer = vcpu->arch.shadow_efer; |
b6c7a5dc HB |
3910 | sregs->apic_base = kvm_get_apic_base(vcpu); |
3911 | ||
923c61bb | 3912 | memset(sregs->interrupt_bitmap, 0, sizeof sregs->interrupt_bitmap); |
b6c7a5dc | 3913 | |
36752c9b | 3914 | if (vcpu->arch.interrupt.pending && !vcpu->arch.interrupt.soft) |
14d0bc1f GN |
3915 | set_bit(vcpu->arch.interrupt.nr, |
3916 | (unsigned long *)sregs->interrupt_bitmap); | |
16d7a191 | 3917 | |
b6c7a5dc HB |
3918 | vcpu_put(vcpu); |
3919 | ||
3920 | return 0; | |
3921 | } | |
3922 | ||
62d9f0db MT |
3923 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
3924 | struct kvm_mp_state *mp_state) | |
3925 | { | |
3926 | vcpu_load(vcpu); | |
3927 | mp_state->mp_state = vcpu->arch.mp_state; | |
3928 | vcpu_put(vcpu); | |
3929 | return 0; | |
3930 | } | |
3931 | ||
3932 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
3933 | struct kvm_mp_state *mp_state) | |
3934 | { | |
3935 | vcpu_load(vcpu); | |
3936 | vcpu->arch.mp_state = mp_state->mp_state; | |
3937 | vcpu_put(vcpu); | |
3938 | return 0; | |
3939 | } | |
3940 | ||
3e6e0aab | 3941 | static void kvm_set_segment(struct kvm_vcpu *vcpu, |
b6c7a5dc HB |
3942 | struct kvm_segment *var, int seg) |
3943 | { | |
14af3f3c | 3944 | kvm_x86_ops->set_segment(vcpu, var, seg); |
b6c7a5dc HB |
3945 | } |
3946 | ||
37817f29 IE |
3947 | static void seg_desct_to_kvm_desct(struct desc_struct *seg_desc, u16 selector, |
3948 | struct kvm_segment *kvm_desct) | |
3949 | { | |
3950 | kvm_desct->base = seg_desc->base0; | |
3951 | kvm_desct->base |= seg_desc->base1 << 16; | |
3952 | kvm_desct->base |= seg_desc->base2 << 24; | |
3953 | kvm_desct->limit = seg_desc->limit0; | |
3954 | kvm_desct->limit |= seg_desc->limit << 16; | |
c93cd3a5 MT |
3955 | if (seg_desc->g) { |
3956 | kvm_desct->limit <<= 12; | |
3957 | kvm_desct->limit |= 0xfff; | |
3958 | } | |
37817f29 IE |
3959 | kvm_desct->selector = selector; |
3960 | kvm_desct->type = seg_desc->type; | |
3961 | kvm_desct->present = seg_desc->p; | |
3962 | kvm_desct->dpl = seg_desc->dpl; | |
3963 | kvm_desct->db = seg_desc->d; | |
3964 | kvm_desct->s = seg_desc->s; | |
3965 | kvm_desct->l = seg_desc->l; | |
3966 | kvm_desct->g = seg_desc->g; | |
3967 | kvm_desct->avl = seg_desc->avl; | |
3968 | if (!selector) | |
3969 | kvm_desct->unusable = 1; | |
3970 | else | |
3971 | kvm_desct->unusable = 0; | |
3972 | kvm_desct->padding = 0; | |
3973 | } | |
3974 | ||
b8222ad2 AS |
3975 | static void get_segment_descriptor_dtable(struct kvm_vcpu *vcpu, |
3976 | u16 selector, | |
3977 | struct descriptor_table *dtable) | |
37817f29 IE |
3978 | { |
3979 | if (selector & 1 << 2) { | |
3980 | struct kvm_segment kvm_seg; | |
3981 | ||
3e6e0aab | 3982 | kvm_get_segment(vcpu, &kvm_seg, VCPU_SREG_LDTR); |
37817f29 IE |
3983 | |
3984 | if (kvm_seg.unusable) | |
3985 | dtable->limit = 0; | |
3986 | else | |
3987 | dtable->limit = kvm_seg.limit; | |
3988 | dtable->base = kvm_seg.base; | |
3989 | } | |
3990 | else | |
3991 | kvm_x86_ops->get_gdt(vcpu, dtable); | |
3992 | } | |
3993 | ||
3994 | /* allowed just for 8 bytes segments */ | |
3995 | static int load_guest_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, | |
3996 | struct desc_struct *seg_desc) | |
3997 | { | |
98899aa0 | 3998 | gpa_t gpa; |
37817f29 IE |
3999 | struct descriptor_table dtable; |
4000 | u16 index = selector >> 3; | |
4001 | ||
b8222ad2 | 4002 | get_segment_descriptor_dtable(vcpu, selector, &dtable); |
37817f29 IE |
4003 | |
4004 | if (dtable.limit < index * 8 + 7) { | |
4005 | kvm_queue_exception_e(vcpu, GP_VECTOR, selector & 0xfffc); | |
4006 | return 1; | |
4007 | } | |
98899aa0 MT |
4008 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, dtable.base); |
4009 | gpa += index * 8; | |
4010 | return kvm_read_guest(vcpu->kvm, gpa, seg_desc, 8); | |
37817f29 IE |
4011 | } |
4012 | ||
4013 | /* allowed just for 8 bytes segments */ | |
4014 | static int save_guest_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, | |
4015 | struct desc_struct *seg_desc) | |
4016 | { | |
98899aa0 | 4017 | gpa_t gpa; |
37817f29 IE |
4018 | struct descriptor_table dtable; |
4019 | u16 index = selector >> 3; | |
4020 | ||
b8222ad2 | 4021 | get_segment_descriptor_dtable(vcpu, selector, &dtable); |
37817f29 IE |
4022 | |
4023 | if (dtable.limit < index * 8 + 7) | |
4024 | return 1; | |
98899aa0 MT |
4025 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, dtable.base); |
4026 | gpa += index * 8; | |
4027 | return kvm_write_guest(vcpu->kvm, gpa, seg_desc, 8); | |
37817f29 IE |
4028 | } |
4029 | ||
4030 | static u32 get_tss_base_addr(struct kvm_vcpu *vcpu, | |
4031 | struct desc_struct *seg_desc) | |
4032 | { | |
4033 | u32 base_addr; | |
4034 | ||
4035 | base_addr = seg_desc->base0; | |
4036 | base_addr |= (seg_desc->base1 << 16); | |
4037 | base_addr |= (seg_desc->base2 << 24); | |
4038 | ||
98899aa0 | 4039 | return vcpu->arch.mmu.gva_to_gpa(vcpu, base_addr); |
37817f29 IE |
4040 | } |
4041 | ||
37817f29 IE |
4042 | static u16 get_segment_selector(struct kvm_vcpu *vcpu, int seg) |
4043 | { | |
4044 | struct kvm_segment kvm_seg; | |
4045 | ||
3e6e0aab | 4046 | kvm_get_segment(vcpu, &kvm_seg, seg); |
37817f29 IE |
4047 | return kvm_seg.selector; |
4048 | } | |
4049 | ||
4050 | static int load_segment_descriptor_to_kvm_desct(struct kvm_vcpu *vcpu, | |
4051 | u16 selector, | |
4052 | struct kvm_segment *kvm_seg) | |
4053 | { | |
4054 | struct desc_struct seg_desc; | |
4055 | ||
4056 | if (load_guest_segment_descriptor(vcpu, selector, &seg_desc)) | |
4057 | return 1; | |
4058 | seg_desct_to_kvm_desct(&seg_desc, selector, kvm_seg); | |
4059 | return 0; | |
4060 | } | |
4061 | ||
2259e3a7 | 4062 | static int kvm_load_realmode_segment(struct kvm_vcpu *vcpu, u16 selector, int seg) |
f4bbd9aa AK |
4063 | { |
4064 | struct kvm_segment segvar = { | |
4065 | .base = selector << 4, | |
4066 | .limit = 0xffff, | |
4067 | .selector = selector, | |
4068 | .type = 3, | |
4069 | .present = 1, | |
4070 | .dpl = 3, | |
4071 | .db = 0, | |
4072 | .s = 1, | |
4073 | .l = 0, | |
4074 | .g = 0, | |
4075 | .avl = 0, | |
4076 | .unusable = 0, | |
4077 | }; | |
4078 | kvm_x86_ops->set_segment(vcpu, &segvar, seg); | |
4079 | return 0; | |
4080 | } | |
4081 | ||
3e6e0aab GT |
4082 | int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, |
4083 | int type_bits, int seg) | |
37817f29 IE |
4084 | { |
4085 | struct kvm_segment kvm_seg; | |
4086 | ||
f4bbd9aa AK |
4087 | if (!(vcpu->arch.cr0 & X86_CR0_PE)) |
4088 | return kvm_load_realmode_segment(vcpu, selector, seg); | |
37817f29 IE |
4089 | if (load_segment_descriptor_to_kvm_desct(vcpu, selector, &kvm_seg)) |
4090 | return 1; | |
4091 | kvm_seg.type |= type_bits; | |
4092 | ||
4093 | if (seg != VCPU_SREG_SS && seg != VCPU_SREG_CS && | |
4094 | seg != VCPU_SREG_LDTR) | |
4095 | if (!kvm_seg.s) | |
4096 | kvm_seg.unusable = 1; | |
4097 | ||
3e6e0aab | 4098 | kvm_set_segment(vcpu, &kvm_seg, seg); |
37817f29 IE |
4099 | return 0; |
4100 | } | |
4101 | ||
4102 | static void save_state_to_tss32(struct kvm_vcpu *vcpu, | |
4103 | struct tss_segment_32 *tss) | |
4104 | { | |
4105 | tss->cr3 = vcpu->arch.cr3; | |
5fdbf976 | 4106 | tss->eip = kvm_rip_read(vcpu); |
37817f29 | 4107 | tss->eflags = kvm_x86_ops->get_rflags(vcpu); |
5fdbf976 MT |
4108 | tss->eax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
4109 | tss->ecx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
4110 | tss->edx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
4111 | tss->ebx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
4112 | tss->esp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
4113 | tss->ebp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
4114 | tss->esi = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
4115 | tss->edi = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
37817f29 IE |
4116 | tss->es = get_segment_selector(vcpu, VCPU_SREG_ES); |
4117 | tss->cs = get_segment_selector(vcpu, VCPU_SREG_CS); | |
4118 | tss->ss = get_segment_selector(vcpu, VCPU_SREG_SS); | |
4119 | tss->ds = get_segment_selector(vcpu, VCPU_SREG_DS); | |
4120 | tss->fs = get_segment_selector(vcpu, VCPU_SREG_FS); | |
4121 | tss->gs = get_segment_selector(vcpu, VCPU_SREG_GS); | |
4122 | tss->ldt_selector = get_segment_selector(vcpu, VCPU_SREG_LDTR); | |
37817f29 IE |
4123 | } |
4124 | ||
4125 | static int load_state_from_tss32(struct kvm_vcpu *vcpu, | |
4126 | struct tss_segment_32 *tss) | |
4127 | { | |
4128 | kvm_set_cr3(vcpu, tss->cr3); | |
4129 | ||
5fdbf976 | 4130 | kvm_rip_write(vcpu, tss->eip); |
37817f29 IE |
4131 | kvm_x86_ops->set_rflags(vcpu, tss->eflags | 2); |
4132 | ||
5fdbf976 MT |
4133 | kvm_register_write(vcpu, VCPU_REGS_RAX, tss->eax); |
4134 | kvm_register_write(vcpu, VCPU_REGS_RCX, tss->ecx); | |
4135 | kvm_register_write(vcpu, VCPU_REGS_RDX, tss->edx); | |
4136 | kvm_register_write(vcpu, VCPU_REGS_RBX, tss->ebx); | |
4137 | kvm_register_write(vcpu, VCPU_REGS_RSP, tss->esp); | |
4138 | kvm_register_write(vcpu, VCPU_REGS_RBP, tss->ebp); | |
4139 | kvm_register_write(vcpu, VCPU_REGS_RSI, tss->esi); | |
4140 | kvm_register_write(vcpu, VCPU_REGS_RDI, tss->edi); | |
37817f29 | 4141 | |
3e6e0aab | 4142 | if (kvm_load_segment_descriptor(vcpu, tss->ldt_selector, 0, VCPU_SREG_LDTR)) |
37817f29 IE |
4143 | return 1; |
4144 | ||
3e6e0aab | 4145 | if (kvm_load_segment_descriptor(vcpu, tss->es, 1, VCPU_SREG_ES)) |
37817f29 IE |
4146 | return 1; |
4147 | ||
3e6e0aab | 4148 | if (kvm_load_segment_descriptor(vcpu, tss->cs, 9, VCPU_SREG_CS)) |
37817f29 IE |
4149 | return 1; |
4150 | ||
3e6e0aab | 4151 | if (kvm_load_segment_descriptor(vcpu, tss->ss, 1, VCPU_SREG_SS)) |
37817f29 IE |
4152 | return 1; |
4153 | ||
3e6e0aab | 4154 | if (kvm_load_segment_descriptor(vcpu, tss->ds, 1, VCPU_SREG_DS)) |
37817f29 IE |
4155 | return 1; |
4156 | ||
3e6e0aab | 4157 | if (kvm_load_segment_descriptor(vcpu, tss->fs, 1, VCPU_SREG_FS)) |
37817f29 IE |
4158 | return 1; |
4159 | ||
3e6e0aab | 4160 | if (kvm_load_segment_descriptor(vcpu, tss->gs, 1, VCPU_SREG_GS)) |
37817f29 IE |
4161 | return 1; |
4162 | return 0; | |
4163 | } | |
4164 | ||
4165 | static void save_state_to_tss16(struct kvm_vcpu *vcpu, | |
4166 | struct tss_segment_16 *tss) | |
4167 | { | |
5fdbf976 | 4168 | tss->ip = kvm_rip_read(vcpu); |
37817f29 | 4169 | tss->flag = kvm_x86_ops->get_rflags(vcpu); |
5fdbf976 MT |
4170 | tss->ax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
4171 | tss->cx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
4172 | tss->dx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
4173 | tss->bx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
4174 | tss->sp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
4175 | tss->bp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
4176 | tss->si = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
4177 | tss->di = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
37817f29 IE |
4178 | |
4179 | tss->es = get_segment_selector(vcpu, VCPU_SREG_ES); | |
4180 | tss->cs = get_segment_selector(vcpu, VCPU_SREG_CS); | |
4181 | tss->ss = get_segment_selector(vcpu, VCPU_SREG_SS); | |
4182 | tss->ds = get_segment_selector(vcpu, VCPU_SREG_DS); | |
4183 | tss->ldt = get_segment_selector(vcpu, VCPU_SREG_LDTR); | |
4184 | tss->prev_task_link = get_segment_selector(vcpu, VCPU_SREG_TR); | |
4185 | } | |
4186 | ||
4187 | static int load_state_from_tss16(struct kvm_vcpu *vcpu, | |
4188 | struct tss_segment_16 *tss) | |
4189 | { | |
5fdbf976 | 4190 | kvm_rip_write(vcpu, tss->ip); |
37817f29 | 4191 | kvm_x86_ops->set_rflags(vcpu, tss->flag | 2); |
5fdbf976 MT |
4192 | kvm_register_write(vcpu, VCPU_REGS_RAX, tss->ax); |
4193 | kvm_register_write(vcpu, VCPU_REGS_RCX, tss->cx); | |
4194 | kvm_register_write(vcpu, VCPU_REGS_RDX, tss->dx); | |
4195 | kvm_register_write(vcpu, VCPU_REGS_RBX, tss->bx); | |
4196 | kvm_register_write(vcpu, VCPU_REGS_RSP, tss->sp); | |
4197 | kvm_register_write(vcpu, VCPU_REGS_RBP, tss->bp); | |
4198 | kvm_register_write(vcpu, VCPU_REGS_RSI, tss->si); | |
4199 | kvm_register_write(vcpu, VCPU_REGS_RDI, tss->di); | |
37817f29 | 4200 | |
3e6e0aab | 4201 | if (kvm_load_segment_descriptor(vcpu, tss->ldt, 0, VCPU_SREG_LDTR)) |
37817f29 IE |
4202 | return 1; |
4203 | ||
3e6e0aab | 4204 | if (kvm_load_segment_descriptor(vcpu, tss->es, 1, VCPU_SREG_ES)) |
37817f29 IE |
4205 | return 1; |
4206 | ||
3e6e0aab | 4207 | if (kvm_load_segment_descriptor(vcpu, tss->cs, 9, VCPU_SREG_CS)) |
37817f29 IE |
4208 | return 1; |
4209 | ||
3e6e0aab | 4210 | if (kvm_load_segment_descriptor(vcpu, tss->ss, 1, VCPU_SREG_SS)) |
37817f29 IE |
4211 | return 1; |
4212 | ||
3e6e0aab | 4213 | if (kvm_load_segment_descriptor(vcpu, tss->ds, 1, VCPU_SREG_DS)) |
37817f29 IE |
4214 | return 1; |
4215 | return 0; | |
4216 | } | |
4217 | ||
8b2cf73c | 4218 | static int kvm_task_switch_16(struct kvm_vcpu *vcpu, u16 tss_selector, |
b237ac37 GN |
4219 | u16 old_tss_sel, u32 old_tss_base, |
4220 | struct desc_struct *nseg_desc) | |
37817f29 IE |
4221 | { |
4222 | struct tss_segment_16 tss_segment_16; | |
4223 | int ret = 0; | |
4224 | ||
34198bf8 MT |
4225 | if (kvm_read_guest(vcpu->kvm, old_tss_base, &tss_segment_16, |
4226 | sizeof tss_segment_16)) | |
37817f29 IE |
4227 | goto out; |
4228 | ||
4229 | save_state_to_tss16(vcpu, &tss_segment_16); | |
37817f29 | 4230 | |
34198bf8 MT |
4231 | if (kvm_write_guest(vcpu->kvm, old_tss_base, &tss_segment_16, |
4232 | sizeof tss_segment_16)) | |
37817f29 | 4233 | goto out; |
34198bf8 MT |
4234 | |
4235 | if (kvm_read_guest(vcpu->kvm, get_tss_base_addr(vcpu, nseg_desc), | |
4236 | &tss_segment_16, sizeof tss_segment_16)) | |
4237 | goto out; | |
4238 | ||
b237ac37 GN |
4239 | if (old_tss_sel != 0xffff) { |
4240 | tss_segment_16.prev_task_link = old_tss_sel; | |
4241 | ||
4242 | if (kvm_write_guest(vcpu->kvm, | |
4243 | get_tss_base_addr(vcpu, nseg_desc), | |
4244 | &tss_segment_16.prev_task_link, | |
4245 | sizeof tss_segment_16.prev_task_link)) | |
4246 | goto out; | |
4247 | } | |
4248 | ||
37817f29 IE |
4249 | if (load_state_from_tss16(vcpu, &tss_segment_16)) |
4250 | goto out; | |
4251 | ||
4252 | ret = 1; | |
4253 | out: | |
4254 | return ret; | |
4255 | } | |
4256 | ||
8b2cf73c | 4257 | static int kvm_task_switch_32(struct kvm_vcpu *vcpu, u16 tss_selector, |
b237ac37 | 4258 | u16 old_tss_sel, u32 old_tss_base, |
37817f29 IE |
4259 | struct desc_struct *nseg_desc) |
4260 | { | |
4261 | struct tss_segment_32 tss_segment_32; | |
4262 | int ret = 0; | |
4263 | ||
34198bf8 MT |
4264 | if (kvm_read_guest(vcpu->kvm, old_tss_base, &tss_segment_32, |
4265 | sizeof tss_segment_32)) | |
37817f29 IE |
4266 | goto out; |
4267 | ||
4268 | save_state_to_tss32(vcpu, &tss_segment_32); | |
37817f29 | 4269 | |
34198bf8 MT |
4270 | if (kvm_write_guest(vcpu->kvm, old_tss_base, &tss_segment_32, |
4271 | sizeof tss_segment_32)) | |
4272 | goto out; | |
4273 | ||
4274 | if (kvm_read_guest(vcpu->kvm, get_tss_base_addr(vcpu, nseg_desc), | |
4275 | &tss_segment_32, sizeof tss_segment_32)) | |
37817f29 | 4276 | goto out; |
34198bf8 | 4277 | |
b237ac37 GN |
4278 | if (old_tss_sel != 0xffff) { |
4279 | tss_segment_32.prev_task_link = old_tss_sel; | |
4280 | ||
4281 | if (kvm_write_guest(vcpu->kvm, | |
4282 | get_tss_base_addr(vcpu, nseg_desc), | |
4283 | &tss_segment_32.prev_task_link, | |
4284 | sizeof tss_segment_32.prev_task_link)) | |
4285 | goto out; | |
4286 | } | |
4287 | ||
37817f29 IE |
4288 | if (load_state_from_tss32(vcpu, &tss_segment_32)) |
4289 | goto out; | |
4290 | ||
4291 | ret = 1; | |
4292 | out: | |
4293 | return ret; | |
4294 | } | |
4295 | ||
4296 | int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason) | |
4297 | { | |
4298 | struct kvm_segment tr_seg; | |
4299 | struct desc_struct cseg_desc; | |
4300 | struct desc_struct nseg_desc; | |
4301 | int ret = 0; | |
34198bf8 MT |
4302 | u32 old_tss_base = get_segment_base(vcpu, VCPU_SREG_TR); |
4303 | u16 old_tss_sel = get_segment_selector(vcpu, VCPU_SREG_TR); | |
37817f29 | 4304 | |
34198bf8 | 4305 | old_tss_base = vcpu->arch.mmu.gva_to_gpa(vcpu, old_tss_base); |
37817f29 | 4306 | |
34198bf8 MT |
4307 | /* FIXME: Handle errors. Failure to read either TSS or their |
4308 | * descriptors should generate a pagefault. | |
4309 | */ | |
37817f29 IE |
4310 | if (load_guest_segment_descriptor(vcpu, tss_selector, &nseg_desc)) |
4311 | goto out; | |
4312 | ||
34198bf8 | 4313 | if (load_guest_segment_descriptor(vcpu, old_tss_sel, &cseg_desc)) |
37817f29 IE |
4314 | goto out; |
4315 | ||
37817f29 IE |
4316 | if (reason != TASK_SWITCH_IRET) { |
4317 | int cpl; | |
4318 | ||
4319 | cpl = kvm_x86_ops->get_cpl(vcpu); | |
4320 | if ((tss_selector & 3) > nseg_desc.dpl || cpl > nseg_desc.dpl) { | |
4321 | kvm_queue_exception_e(vcpu, GP_VECTOR, 0); | |
4322 | return 1; | |
4323 | } | |
4324 | } | |
4325 | ||
4326 | if (!nseg_desc.p || (nseg_desc.limit0 | nseg_desc.limit << 16) < 0x67) { | |
4327 | kvm_queue_exception_e(vcpu, TS_VECTOR, tss_selector & 0xfffc); | |
4328 | return 1; | |
4329 | } | |
4330 | ||
4331 | if (reason == TASK_SWITCH_IRET || reason == TASK_SWITCH_JMP) { | |
3fe913e7 | 4332 | cseg_desc.type &= ~(1 << 1); //clear the B flag |
34198bf8 | 4333 | save_guest_segment_descriptor(vcpu, old_tss_sel, &cseg_desc); |
37817f29 IE |
4334 | } |
4335 | ||
4336 | if (reason == TASK_SWITCH_IRET) { | |
4337 | u32 eflags = kvm_x86_ops->get_rflags(vcpu); | |
4338 | kvm_x86_ops->set_rflags(vcpu, eflags & ~X86_EFLAGS_NT); | |
4339 | } | |
4340 | ||
64a7ec06 GN |
4341 | /* set back link to prev task only if NT bit is set in eflags |
4342 | note that old_tss_sel is not used afetr this point */ | |
4343 | if (reason != TASK_SWITCH_CALL && reason != TASK_SWITCH_GATE) | |
4344 | old_tss_sel = 0xffff; | |
37817f29 | 4345 | |
b237ac37 GN |
4346 | /* set back link to prev task only if NT bit is set in eflags |
4347 | note that old_tss_sel is not used afetr this point */ | |
4348 | if (reason != TASK_SWITCH_CALL && reason != TASK_SWITCH_GATE) | |
4349 | old_tss_sel = 0xffff; | |
4350 | ||
37817f29 | 4351 | if (nseg_desc.type & 8) |
b237ac37 GN |
4352 | ret = kvm_task_switch_32(vcpu, tss_selector, old_tss_sel, |
4353 | old_tss_base, &nseg_desc); | |
37817f29 | 4354 | else |
b237ac37 GN |
4355 | ret = kvm_task_switch_16(vcpu, tss_selector, old_tss_sel, |
4356 | old_tss_base, &nseg_desc); | |
37817f29 IE |
4357 | |
4358 | if (reason == TASK_SWITCH_CALL || reason == TASK_SWITCH_GATE) { | |
4359 | u32 eflags = kvm_x86_ops->get_rflags(vcpu); | |
4360 | kvm_x86_ops->set_rflags(vcpu, eflags | X86_EFLAGS_NT); | |
4361 | } | |
4362 | ||
4363 | if (reason != TASK_SWITCH_IRET) { | |
3fe913e7 | 4364 | nseg_desc.type |= (1 << 1); |
37817f29 IE |
4365 | save_guest_segment_descriptor(vcpu, tss_selector, |
4366 | &nseg_desc); | |
4367 | } | |
4368 | ||
4369 | kvm_x86_ops->set_cr0(vcpu, vcpu->arch.cr0 | X86_CR0_TS); | |
4370 | seg_desct_to_kvm_desct(&nseg_desc, tss_selector, &tr_seg); | |
4371 | tr_seg.type = 11; | |
3e6e0aab | 4372 | kvm_set_segment(vcpu, &tr_seg, VCPU_SREG_TR); |
37817f29 | 4373 | out: |
37817f29 IE |
4374 | return ret; |
4375 | } | |
4376 | EXPORT_SYMBOL_GPL(kvm_task_switch); | |
4377 | ||
b6c7a5dc HB |
4378 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
4379 | struct kvm_sregs *sregs) | |
4380 | { | |
4381 | int mmu_reset_needed = 0; | |
923c61bb | 4382 | int pending_vec, max_bits; |
b6c7a5dc HB |
4383 | struct descriptor_table dt; |
4384 | ||
4385 | vcpu_load(vcpu); | |
4386 | ||
4387 | dt.limit = sregs->idt.limit; | |
4388 | dt.base = sregs->idt.base; | |
4389 | kvm_x86_ops->set_idt(vcpu, &dt); | |
4390 | dt.limit = sregs->gdt.limit; | |
4391 | dt.base = sregs->gdt.base; | |
4392 | kvm_x86_ops->set_gdt(vcpu, &dt); | |
4393 | ||
ad312c7c ZX |
4394 | vcpu->arch.cr2 = sregs->cr2; |
4395 | mmu_reset_needed |= vcpu->arch.cr3 != sregs->cr3; | |
dc7e795e | 4396 | vcpu->arch.cr3 = sregs->cr3; |
b6c7a5dc | 4397 | |
2d3ad1f4 | 4398 | kvm_set_cr8(vcpu, sregs->cr8); |
b6c7a5dc | 4399 | |
ad312c7c | 4400 | mmu_reset_needed |= vcpu->arch.shadow_efer != sregs->efer; |
b6c7a5dc | 4401 | kvm_x86_ops->set_efer(vcpu, sregs->efer); |
b6c7a5dc HB |
4402 | kvm_set_apic_base(vcpu, sregs->apic_base); |
4403 | ||
4404 | kvm_x86_ops->decache_cr4_guest_bits(vcpu); | |
4405 | ||
ad312c7c | 4406 | mmu_reset_needed |= vcpu->arch.cr0 != sregs->cr0; |
b6c7a5dc | 4407 | kvm_x86_ops->set_cr0(vcpu, sregs->cr0); |
d7306163 | 4408 | vcpu->arch.cr0 = sregs->cr0; |
b6c7a5dc | 4409 | |
ad312c7c | 4410 | mmu_reset_needed |= vcpu->arch.cr4 != sregs->cr4; |
b6c7a5dc HB |
4411 | kvm_x86_ops->set_cr4(vcpu, sregs->cr4); |
4412 | if (!is_long_mode(vcpu) && is_pae(vcpu)) | |
ad312c7c | 4413 | load_pdptrs(vcpu, vcpu->arch.cr3); |
b6c7a5dc HB |
4414 | |
4415 | if (mmu_reset_needed) | |
4416 | kvm_mmu_reset_context(vcpu); | |
4417 | ||
923c61bb GN |
4418 | max_bits = (sizeof sregs->interrupt_bitmap) << 3; |
4419 | pending_vec = find_first_bit( | |
4420 | (const unsigned long *)sregs->interrupt_bitmap, max_bits); | |
4421 | if (pending_vec < max_bits) { | |
66fd3f7f | 4422 | kvm_queue_interrupt(vcpu, pending_vec, false); |
923c61bb GN |
4423 | pr_debug("Set back pending irq %d\n", pending_vec); |
4424 | if (irqchip_in_kernel(vcpu->kvm)) | |
4425 | kvm_pic_clear_isr_ack(vcpu->kvm); | |
b6c7a5dc HB |
4426 | } |
4427 | ||
3e6e0aab GT |
4428 | kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
4429 | kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
4430 | kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
4431 | kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
4432 | kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
4433 | kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 4434 | |
3e6e0aab GT |
4435 | kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
4436 | kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc | 4437 | |
9c3e4aab | 4438 | /* Older userspace won't unhalt the vcpu on reset. */ |
c5af89b6 | 4439 | if (kvm_vcpu_is_bsp(vcpu) && kvm_rip_read(vcpu) == 0xfff0 && |
9c3e4aab MT |
4440 | sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 && |
4441 | !(vcpu->arch.cr0 & X86_CR0_PE)) | |
4442 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; | |
4443 | ||
b6c7a5dc HB |
4444 | vcpu_put(vcpu); |
4445 | ||
4446 | return 0; | |
4447 | } | |
4448 | ||
d0bfb940 JK |
4449 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
4450 | struct kvm_guest_debug *dbg) | |
b6c7a5dc | 4451 | { |
ae675ef0 | 4452 | int i, r; |
b6c7a5dc HB |
4453 | |
4454 | vcpu_load(vcpu); | |
4455 | ||
ae675ef0 JK |
4456 | if ((dbg->control & (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP)) == |
4457 | (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP)) { | |
4458 | for (i = 0; i < KVM_NR_DB_REGS; ++i) | |
4459 | vcpu->arch.eff_db[i] = dbg->arch.debugreg[i]; | |
4460 | vcpu->arch.switch_db_regs = | |
4461 | (dbg->arch.debugreg[7] & DR7_BP_EN_MASK); | |
4462 | } else { | |
4463 | for (i = 0; i < KVM_NR_DB_REGS; i++) | |
4464 | vcpu->arch.eff_db[i] = vcpu->arch.db[i]; | |
4465 | vcpu->arch.switch_db_regs = (vcpu->arch.dr7 & DR7_BP_EN_MASK); | |
4466 | } | |
4467 | ||
b6c7a5dc HB |
4468 | r = kvm_x86_ops->set_guest_debug(vcpu, dbg); |
4469 | ||
d0bfb940 JK |
4470 | if (dbg->control & KVM_GUESTDBG_INJECT_DB) |
4471 | kvm_queue_exception(vcpu, DB_VECTOR); | |
4472 | else if (dbg->control & KVM_GUESTDBG_INJECT_BP) | |
4473 | kvm_queue_exception(vcpu, BP_VECTOR); | |
4474 | ||
b6c7a5dc HB |
4475 | vcpu_put(vcpu); |
4476 | ||
4477 | return r; | |
4478 | } | |
4479 | ||
d0752060 HB |
4480 | /* |
4481 | * fxsave fpu state. Taken from x86_64/processor.h. To be killed when | |
4482 | * we have asm/x86/processor.h | |
4483 | */ | |
4484 | struct fxsave { | |
4485 | u16 cwd; | |
4486 | u16 swd; | |
4487 | u16 twd; | |
4488 | u16 fop; | |
4489 | u64 rip; | |
4490 | u64 rdp; | |
4491 | u32 mxcsr; | |
4492 | u32 mxcsr_mask; | |
4493 | u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */ | |
4494 | #ifdef CONFIG_X86_64 | |
4495 | u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */ | |
4496 | #else | |
4497 | u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */ | |
4498 | #endif | |
4499 | }; | |
4500 | ||
8b006791 ZX |
4501 | /* |
4502 | * Translate a guest virtual address to a guest physical address. | |
4503 | */ | |
4504 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
4505 | struct kvm_translation *tr) | |
4506 | { | |
4507 | unsigned long vaddr = tr->linear_address; | |
4508 | gpa_t gpa; | |
4509 | ||
4510 | vcpu_load(vcpu); | |
72dc67a6 | 4511 | down_read(&vcpu->kvm->slots_lock); |
ad312c7c | 4512 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, vaddr); |
72dc67a6 | 4513 | up_read(&vcpu->kvm->slots_lock); |
8b006791 ZX |
4514 | tr->physical_address = gpa; |
4515 | tr->valid = gpa != UNMAPPED_GVA; | |
4516 | tr->writeable = 1; | |
4517 | tr->usermode = 0; | |
8b006791 ZX |
4518 | vcpu_put(vcpu); |
4519 | ||
4520 | return 0; | |
4521 | } | |
4522 | ||
d0752060 HB |
4523 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
4524 | { | |
ad312c7c | 4525 | struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image; |
d0752060 HB |
4526 | |
4527 | vcpu_load(vcpu); | |
4528 | ||
4529 | memcpy(fpu->fpr, fxsave->st_space, 128); | |
4530 | fpu->fcw = fxsave->cwd; | |
4531 | fpu->fsw = fxsave->swd; | |
4532 | fpu->ftwx = fxsave->twd; | |
4533 | fpu->last_opcode = fxsave->fop; | |
4534 | fpu->last_ip = fxsave->rip; | |
4535 | fpu->last_dp = fxsave->rdp; | |
4536 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space); | |
4537 | ||
4538 | vcpu_put(vcpu); | |
4539 | ||
4540 | return 0; | |
4541 | } | |
4542 | ||
4543 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
4544 | { | |
ad312c7c | 4545 | struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image; |
d0752060 HB |
4546 | |
4547 | vcpu_load(vcpu); | |
4548 | ||
4549 | memcpy(fxsave->st_space, fpu->fpr, 128); | |
4550 | fxsave->cwd = fpu->fcw; | |
4551 | fxsave->swd = fpu->fsw; | |
4552 | fxsave->twd = fpu->ftwx; | |
4553 | fxsave->fop = fpu->last_opcode; | |
4554 | fxsave->rip = fpu->last_ip; | |
4555 | fxsave->rdp = fpu->last_dp; | |
4556 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space); | |
4557 | ||
4558 | vcpu_put(vcpu); | |
4559 | ||
4560 | return 0; | |
4561 | } | |
4562 | ||
4563 | void fx_init(struct kvm_vcpu *vcpu) | |
4564 | { | |
4565 | unsigned after_mxcsr_mask; | |
4566 | ||
bc1a34f1 AA |
4567 | /* |
4568 | * Touch the fpu the first time in non atomic context as if | |
4569 | * this is the first fpu instruction the exception handler | |
4570 | * will fire before the instruction returns and it'll have to | |
4571 | * allocate ram with GFP_KERNEL. | |
4572 | */ | |
4573 | if (!used_math()) | |
d6e88aec | 4574 | kvm_fx_save(&vcpu->arch.host_fx_image); |
bc1a34f1 | 4575 | |
d0752060 HB |
4576 | /* Initialize guest FPU by resetting ours and saving into guest's */ |
4577 | preempt_disable(); | |
d6e88aec AK |
4578 | kvm_fx_save(&vcpu->arch.host_fx_image); |
4579 | kvm_fx_finit(); | |
4580 | kvm_fx_save(&vcpu->arch.guest_fx_image); | |
4581 | kvm_fx_restore(&vcpu->arch.host_fx_image); | |
d0752060 HB |
4582 | preempt_enable(); |
4583 | ||
ad312c7c | 4584 | vcpu->arch.cr0 |= X86_CR0_ET; |
d0752060 | 4585 | after_mxcsr_mask = offsetof(struct i387_fxsave_struct, st_space); |
ad312c7c ZX |
4586 | vcpu->arch.guest_fx_image.mxcsr = 0x1f80; |
4587 | memset((void *)&vcpu->arch.guest_fx_image + after_mxcsr_mask, | |
d0752060 HB |
4588 | 0, sizeof(struct i387_fxsave_struct) - after_mxcsr_mask); |
4589 | } | |
4590 | EXPORT_SYMBOL_GPL(fx_init); | |
4591 | ||
4592 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) | |
4593 | { | |
4594 | if (!vcpu->fpu_active || vcpu->guest_fpu_loaded) | |
4595 | return; | |
4596 | ||
4597 | vcpu->guest_fpu_loaded = 1; | |
d6e88aec AK |
4598 | kvm_fx_save(&vcpu->arch.host_fx_image); |
4599 | kvm_fx_restore(&vcpu->arch.guest_fx_image); | |
d0752060 HB |
4600 | } |
4601 | EXPORT_SYMBOL_GPL(kvm_load_guest_fpu); | |
4602 | ||
4603 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) | |
4604 | { | |
4605 | if (!vcpu->guest_fpu_loaded) | |
4606 | return; | |
4607 | ||
4608 | vcpu->guest_fpu_loaded = 0; | |
d6e88aec AK |
4609 | kvm_fx_save(&vcpu->arch.guest_fx_image); |
4610 | kvm_fx_restore(&vcpu->arch.host_fx_image); | |
f096ed85 | 4611 | ++vcpu->stat.fpu_reload; |
d0752060 HB |
4612 | } |
4613 | EXPORT_SYMBOL_GPL(kvm_put_guest_fpu); | |
e9b11c17 ZX |
4614 | |
4615 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
4616 | { | |
7f1ea208 JR |
4617 | if (vcpu->arch.time_page) { |
4618 | kvm_release_page_dirty(vcpu->arch.time_page); | |
4619 | vcpu->arch.time_page = NULL; | |
4620 | } | |
4621 | ||
e9b11c17 ZX |
4622 | kvm_x86_ops->vcpu_free(vcpu); |
4623 | } | |
4624 | ||
4625 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
4626 | unsigned int id) | |
4627 | { | |
26e5215f AK |
4628 | return kvm_x86_ops->vcpu_create(kvm, id); |
4629 | } | |
e9b11c17 | 4630 | |
26e5215f AK |
4631 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
4632 | { | |
4633 | int r; | |
e9b11c17 ZX |
4634 | |
4635 | /* We do fxsave: this must be aligned. */ | |
ad312c7c | 4636 | BUG_ON((unsigned long)&vcpu->arch.host_fx_image & 0xF); |
e9b11c17 | 4637 | |
0bed3b56 | 4638 | vcpu->arch.mtrr_state.have_fixed = 1; |
e9b11c17 ZX |
4639 | vcpu_load(vcpu); |
4640 | r = kvm_arch_vcpu_reset(vcpu); | |
4641 | if (r == 0) | |
4642 | r = kvm_mmu_setup(vcpu); | |
4643 | vcpu_put(vcpu); | |
4644 | if (r < 0) | |
4645 | goto free_vcpu; | |
4646 | ||
26e5215f | 4647 | return 0; |
e9b11c17 ZX |
4648 | free_vcpu: |
4649 | kvm_x86_ops->vcpu_free(vcpu); | |
26e5215f | 4650 | return r; |
e9b11c17 ZX |
4651 | } |
4652 | ||
d40ccc62 | 4653 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
e9b11c17 ZX |
4654 | { |
4655 | vcpu_load(vcpu); | |
4656 | kvm_mmu_unload(vcpu); | |
4657 | vcpu_put(vcpu); | |
4658 | ||
4659 | kvm_x86_ops->vcpu_free(vcpu); | |
4660 | } | |
4661 | ||
4662 | int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu) | |
4663 | { | |
448fa4a9 JK |
4664 | vcpu->arch.nmi_pending = false; |
4665 | vcpu->arch.nmi_injected = false; | |
4666 | ||
42dbaa5a JK |
4667 | vcpu->arch.switch_db_regs = 0; |
4668 | memset(vcpu->arch.db, 0, sizeof(vcpu->arch.db)); | |
4669 | vcpu->arch.dr6 = DR6_FIXED_1; | |
4670 | vcpu->arch.dr7 = DR7_FIXED_1; | |
4671 | ||
e9b11c17 ZX |
4672 | return kvm_x86_ops->vcpu_reset(vcpu); |
4673 | } | |
4674 | ||
4675 | void kvm_arch_hardware_enable(void *garbage) | |
4676 | { | |
4677 | kvm_x86_ops->hardware_enable(garbage); | |
4678 | } | |
4679 | ||
4680 | void kvm_arch_hardware_disable(void *garbage) | |
4681 | { | |
4682 | kvm_x86_ops->hardware_disable(garbage); | |
4683 | } | |
4684 | ||
4685 | int kvm_arch_hardware_setup(void) | |
4686 | { | |
4687 | return kvm_x86_ops->hardware_setup(); | |
4688 | } | |
4689 | ||
4690 | void kvm_arch_hardware_unsetup(void) | |
4691 | { | |
4692 | kvm_x86_ops->hardware_unsetup(); | |
4693 | } | |
4694 | ||
4695 | void kvm_arch_check_processor_compat(void *rtn) | |
4696 | { | |
4697 | kvm_x86_ops->check_processor_compatibility(rtn); | |
4698 | } | |
4699 | ||
4700 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
4701 | { | |
4702 | struct page *page; | |
4703 | struct kvm *kvm; | |
4704 | int r; | |
4705 | ||
4706 | BUG_ON(vcpu->kvm == NULL); | |
4707 | kvm = vcpu->kvm; | |
4708 | ||
ad312c7c | 4709 | vcpu->arch.mmu.root_hpa = INVALID_PAGE; |
c5af89b6 | 4710 | if (!irqchip_in_kernel(kvm) || kvm_vcpu_is_bsp(vcpu)) |
a4535290 | 4711 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
e9b11c17 | 4712 | else |
a4535290 | 4713 | vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED; |
e9b11c17 ZX |
4714 | |
4715 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
4716 | if (!page) { | |
4717 | r = -ENOMEM; | |
4718 | goto fail; | |
4719 | } | |
ad312c7c | 4720 | vcpu->arch.pio_data = page_address(page); |
e9b11c17 ZX |
4721 | |
4722 | r = kvm_mmu_create(vcpu); | |
4723 | if (r < 0) | |
4724 | goto fail_free_pio_data; | |
4725 | ||
4726 | if (irqchip_in_kernel(kvm)) { | |
4727 | r = kvm_create_lapic(vcpu); | |
4728 | if (r < 0) | |
4729 | goto fail_mmu_destroy; | |
4730 | } | |
4731 | ||
890ca9ae HY |
4732 | vcpu->arch.mce_banks = kzalloc(KVM_MAX_MCE_BANKS * sizeof(u64) * 4, |
4733 | GFP_KERNEL); | |
4734 | if (!vcpu->arch.mce_banks) { | |
4735 | r = -ENOMEM; | |
4736 | goto fail_mmu_destroy; | |
4737 | } | |
4738 | vcpu->arch.mcg_cap = KVM_MAX_MCE_BANKS; | |
4739 | ||
e9b11c17 ZX |
4740 | return 0; |
4741 | ||
4742 | fail_mmu_destroy: | |
4743 | kvm_mmu_destroy(vcpu); | |
4744 | fail_free_pio_data: | |
ad312c7c | 4745 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 ZX |
4746 | fail: |
4747 | return r; | |
4748 | } | |
4749 | ||
4750 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
4751 | { | |
4752 | kvm_free_lapic(vcpu); | |
3200f405 | 4753 | down_read(&vcpu->kvm->slots_lock); |
e9b11c17 | 4754 | kvm_mmu_destroy(vcpu); |
3200f405 | 4755 | up_read(&vcpu->kvm->slots_lock); |
ad312c7c | 4756 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 | 4757 | } |
d19a9cd2 ZX |
4758 | |
4759 | struct kvm *kvm_arch_create_vm(void) | |
4760 | { | |
4761 | struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); | |
4762 | ||
4763 | if (!kvm) | |
4764 | return ERR_PTR(-ENOMEM); | |
4765 | ||
f05e70ac | 4766 | INIT_LIST_HEAD(&kvm->arch.active_mmu_pages); |
4d5c5d0f | 4767 | INIT_LIST_HEAD(&kvm->arch.assigned_dev_head); |
d19a9cd2 | 4768 | |
5550af4d SY |
4769 | /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */ |
4770 | set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap); | |
4771 | ||
53f658b3 MT |
4772 | rdtscll(kvm->arch.vm_init_tsc); |
4773 | ||
d19a9cd2 ZX |
4774 | return kvm; |
4775 | } | |
4776 | ||
4777 | static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu) | |
4778 | { | |
4779 | vcpu_load(vcpu); | |
4780 | kvm_mmu_unload(vcpu); | |
4781 | vcpu_put(vcpu); | |
4782 | } | |
4783 | ||
4784 | static void kvm_free_vcpus(struct kvm *kvm) | |
4785 | { | |
4786 | unsigned int i; | |
988a2cae | 4787 | struct kvm_vcpu *vcpu; |
d19a9cd2 ZX |
4788 | |
4789 | /* | |
4790 | * Unpin any mmu pages first. | |
4791 | */ | |
988a2cae GN |
4792 | kvm_for_each_vcpu(i, vcpu, kvm) |
4793 | kvm_unload_vcpu_mmu(vcpu); | |
4794 | kvm_for_each_vcpu(i, vcpu, kvm) | |
4795 | kvm_arch_vcpu_free(vcpu); | |
4796 | ||
4797 | mutex_lock(&kvm->lock); | |
4798 | for (i = 0; i < atomic_read(&kvm->online_vcpus); i++) | |
4799 | kvm->vcpus[i] = NULL; | |
d19a9cd2 | 4800 | |
988a2cae GN |
4801 | atomic_set(&kvm->online_vcpus, 0); |
4802 | mutex_unlock(&kvm->lock); | |
d19a9cd2 ZX |
4803 | } |
4804 | ||
ad8ba2cd SY |
4805 | void kvm_arch_sync_events(struct kvm *kvm) |
4806 | { | |
ba4cef31 | 4807 | kvm_free_all_assigned_devices(kvm); |
ad8ba2cd SY |
4808 | } |
4809 | ||
d19a9cd2 ZX |
4810 | void kvm_arch_destroy_vm(struct kvm *kvm) |
4811 | { | |
6eb55818 | 4812 | kvm_iommu_unmap_guest(kvm); |
7837699f | 4813 | kvm_free_pit(kvm); |
d7deeeb0 ZX |
4814 | kfree(kvm->arch.vpic); |
4815 | kfree(kvm->arch.vioapic); | |
d19a9cd2 ZX |
4816 | kvm_free_vcpus(kvm); |
4817 | kvm_free_physmem(kvm); | |
3d45830c AK |
4818 | if (kvm->arch.apic_access_page) |
4819 | put_page(kvm->arch.apic_access_page); | |
b7ebfb05 SY |
4820 | if (kvm->arch.ept_identity_pagetable) |
4821 | put_page(kvm->arch.ept_identity_pagetable); | |
d19a9cd2 ZX |
4822 | kfree(kvm); |
4823 | } | |
0de10343 ZX |
4824 | |
4825 | int kvm_arch_set_memory_region(struct kvm *kvm, | |
4826 | struct kvm_userspace_memory_region *mem, | |
4827 | struct kvm_memory_slot old, | |
4828 | int user_alloc) | |
4829 | { | |
4830 | int npages = mem->memory_size >> PAGE_SHIFT; | |
4831 | struct kvm_memory_slot *memslot = &kvm->memslots[mem->slot]; | |
4832 | ||
4833 | /*To keep backward compatibility with older userspace, | |
4834 | *x86 needs to hanlde !user_alloc case. | |
4835 | */ | |
4836 | if (!user_alloc) { | |
4837 | if (npages && !old.rmap) { | |
604b38ac AA |
4838 | unsigned long userspace_addr; |
4839 | ||
72dc67a6 | 4840 | down_write(¤t->mm->mmap_sem); |
604b38ac AA |
4841 | userspace_addr = do_mmap(NULL, 0, |
4842 | npages * PAGE_SIZE, | |
4843 | PROT_READ | PROT_WRITE, | |
acee3c04 | 4844 | MAP_PRIVATE | MAP_ANONYMOUS, |
604b38ac | 4845 | 0); |
72dc67a6 | 4846 | up_write(¤t->mm->mmap_sem); |
0de10343 | 4847 | |
604b38ac AA |
4848 | if (IS_ERR((void *)userspace_addr)) |
4849 | return PTR_ERR((void *)userspace_addr); | |
4850 | ||
4851 | /* set userspace_addr atomically for kvm_hva_to_rmapp */ | |
4852 | spin_lock(&kvm->mmu_lock); | |
4853 | memslot->userspace_addr = userspace_addr; | |
4854 | spin_unlock(&kvm->mmu_lock); | |
0de10343 ZX |
4855 | } else { |
4856 | if (!old.user_alloc && old.rmap) { | |
4857 | int ret; | |
4858 | ||
72dc67a6 | 4859 | down_write(¤t->mm->mmap_sem); |
0de10343 ZX |
4860 | ret = do_munmap(current->mm, old.userspace_addr, |
4861 | old.npages * PAGE_SIZE); | |
72dc67a6 | 4862 | up_write(¤t->mm->mmap_sem); |
0de10343 ZX |
4863 | if (ret < 0) |
4864 | printk(KERN_WARNING | |
4865 | "kvm_vm_ioctl_set_memory_region: " | |
4866 | "failed to munmap memory\n"); | |
4867 | } | |
4868 | } | |
4869 | } | |
4870 | ||
7c8a83b7 | 4871 | spin_lock(&kvm->mmu_lock); |
f05e70ac | 4872 | if (!kvm->arch.n_requested_mmu_pages) { |
0de10343 ZX |
4873 | unsigned int nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm); |
4874 | kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages); | |
4875 | } | |
4876 | ||
4877 | kvm_mmu_slot_remove_write_access(kvm, mem->slot); | |
7c8a83b7 | 4878 | spin_unlock(&kvm->mmu_lock); |
0de10343 ZX |
4879 | kvm_flush_remote_tlbs(kvm); |
4880 | ||
4881 | return 0; | |
4882 | } | |
1d737c8a | 4883 | |
34d4cb8f MT |
4884 | void kvm_arch_flush_shadow(struct kvm *kvm) |
4885 | { | |
4886 | kvm_mmu_zap_all(kvm); | |
8986ecc0 | 4887 | kvm_reload_remote_mmus(kvm); |
34d4cb8f MT |
4888 | } |
4889 | ||
1d737c8a ZX |
4890 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
4891 | { | |
a4535290 | 4892 | return vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE |
0496fbb9 JK |
4893 | || vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED |
4894 | || vcpu->arch.nmi_pending; | |
1d737c8a | 4895 | } |
5736199a | 4896 | |
5736199a ZX |
4897 | void kvm_vcpu_kick(struct kvm_vcpu *vcpu) |
4898 | { | |
32f88400 MT |
4899 | int me; |
4900 | int cpu = vcpu->cpu; | |
5736199a ZX |
4901 | |
4902 | if (waitqueue_active(&vcpu->wq)) { | |
4903 | wake_up_interruptible(&vcpu->wq); | |
4904 | ++vcpu->stat.halt_wakeup; | |
4905 | } | |
32f88400 MT |
4906 | |
4907 | me = get_cpu(); | |
4908 | if (cpu != me && (unsigned)cpu < nr_cpu_ids && cpu_online(cpu)) | |
4909 | if (!test_and_set_bit(KVM_REQ_KICK, &vcpu->requests)) | |
4910 | smp_send_reschedule(cpu); | |
e9571ed5 | 4911 | put_cpu(); |
5736199a | 4912 | } |
78646121 GN |
4913 | |
4914 | int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu) | |
4915 | { | |
4916 | return kvm_x86_ops->interrupt_allowed(vcpu); | |
4917 | } | |
229456fc MT |
4918 | |
4919 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit); | |
4920 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq); | |
4921 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault); | |
4922 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr); | |
4923 | EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr); |