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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> |
043405e1 CO |
40 | |
41 | #include <asm/uaccess.h> | |
d825ed0a | 42 | #include <asm/msr.h> |
a5f61300 | 43 | #include <asm/desc.h> |
0bed3b56 | 44 | #include <asm/mtrr.h> |
043405e1 | 45 | |
313a3dc7 | 46 | #define MAX_IO_MSRS 256 |
a03490ed CO |
47 | #define CR0_RESERVED_BITS \ |
48 | (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \ | |
49 | | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \ | |
50 | | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG)) | |
51 | #define CR4_RESERVED_BITS \ | |
52 | (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\ | |
53 | | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \ | |
54 | | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \ | |
55 | | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE)) | |
56 | ||
57 | #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR) | |
50a37eb4 JR |
58 | /* EFER defaults: |
59 | * - enable syscall per default because its emulated by KVM | |
60 | * - enable LME and LMA per default on 64 bit KVM | |
61 | */ | |
62 | #ifdef CONFIG_X86_64 | |
63 | static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffafeULL; | |
64 | #else | |
65 | static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffffeULL; | |
66 | #endif | |
313a3dc7 | 67 | |
ba1389b7 AK |
68 | #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM |
69 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU | |
417bc304 | 70 | |
674eea0f AK |
71 | static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, |
72 | struct kvm_cpuid_entry2 __user *entries); | |
d8017474 AG |
73 | struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu, |
74 | u32 function, u32 index); | |
674eea0f | 75 | |
97896d04 | 76 | struct kvm_x86_ops *kvm_x86_ops; |
5fdbf976 | 77 | EXPORT_SYMBOL_GPL(kvm_x86_ops); |
97896d04 | 78 | |
417bc304 | 79 | struct kvm_stats_debugfs_item debugfs_entries[] = { |
ba1389b7 AK |
80 | { "pf_fixed", VCPU_STAT(pf_fixed) }, |
81 | { "pf_guest", VCPU_STAT(pf_guest) }, | |
82 | { "tlb_flush", VCPU_STAT(tlb_flush) }, | |
83 | { "invlpg", VCPU_STAT(invlpg) }, | |
84 | { "exits", VCPU_STAT(exits) }, | |
85 | { "io_exits", VCPU_STAT(io_exits) }, | |
86 | { "mmio_exits", VCPU_STAT(mmio_exits) }, | |
87 | { "signal_exits", VCPU_STAT(signal_exits) }, | |
88 | { "irq_window", VCPU_STAT(irq_window_exits) }, | |
f08864b4 | 89 | { "nmi_window", VCPU_STAT(nmi_window_exits) }, |
ba1389b7 AK |
90 | { "halt_exits", VCPU_STAT(halt_exits) }, |
91 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, | |
f11c3a8d | 92 | { "hypercalls", VCPU_STAT(hypercalls) }, |
ba1389b7 | 93 | { "request_irq", VCPU_STAT(request_irq_exits) }, |
c4abb7c9 | 94 | { "request_nmi", VCPU_STAT(request_nmi_exits) }, |
ba1389b7 AK |
95 | { "irq_exits", VCPU_STAT(irq_exits) }, |
96 | { "host_state_reload", VCPU_STAT(host_state_reload) }, | |
97 | { "efer_reload", VCPU_STAT(efer_reload) }, | |
98 | { "fpu_reload", VCPU_STAT(fpu_reload) }, | |
99 | { "insn_emulation", VCPU_STAT(insn_emulation) }, | |
100 | { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) }, | |
fa89a817 | 101 | { "irq_injections", VCPU_STAT(irq_injections) }, |
c4abb7c9 | 102 | { "nmi_injections", VCPU_STAT(nmi_injections) }, |
4cee5764 AK |
103 | { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) }, |
104 | { "mmu_pte_write", VM_STAT(mmu_pte_write) }, | |
105 | { "mmu_pte_updated", VM_STAT(mmu_pte_updated) }, | |
106 | { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) }, | |
107 | { "mmu_flooded", VM_STAT(mmu_flooded) }, | |
108 | { "mmu_recycled", VM_STAT(mmu_recycled) }, | |
dfc5aa00 | 109 | { "mmu_cache_miss", VM_STAT(mmu_cache_miss) }, |
4731d4c7 | 110 | { "mmu_unsync", VM_STAT(mmu_unsync) }, |
6cffe8ca | 111 | { "mmu_unsync_global", VM_STAT(mmu_unsync_global) }, |
0f74a24c | 112 | { "remote_tlb_flush", VM_STAT(remote_tlb_flush) }, |
05da4558 | 113 | { "largepages", VM_STAT(lpages) }, |
417bc304 HB |
114 | { NULL } |
115 | }; | |
116 | ||
5fb76f9b CO |
117 | unsigned long segment_base(u16 selector) |
118 | { | |
119 | struct descriptor_table gdt; | |
a5f61300 | 120 | struct desc_struct *d; |
5fb76f9b CO |
121 | unsigned long table_base; |
122 | unsigned long v; | |
123 | ||
124 | if (selector == 0) | |
125 | return 0; | |
126 | ||
127 | asm("sgdt %0" : "=m"(gdt)); | |
128 | table_base = gdt.base; | |
129 | ||
130 | if (selector & 4) { /* from ldt */ | |
131 | u16 ldt_selector; | |
132 | ||
133 | asm("sldt %0" : "=g"(ldt_selector)); | |
134 | table_base = segment_base(ldt_selector); | |
135 | } | |
a5f61300 AK |
136 | d = (struct desc_struct *)(table_base + (selector & ~7)); |
137 | v = d->base0 | ((unsigned long)d->base1 << 16) | | |
138 | ((unsigned long)d->base2 << 24); | |
5fb76f9b | 139 | #ifdef CONFIG_X86_64 |
a5f61300 AK |
140 | if (d->s == 0 && (d->type == 2 || d->type == 9 || d->type == 11)) |
141 | v |= ((unsigned long)((struct ldttss_desc64 *)d)->base3) << 32; | |
5fb76f9b CO |
142 | #endif |
143 | return v; | |
144 | } | |
145 | EXPORT_SYMBOL_GPL(segment_base); | |
146 | ||
6866b83e CO |
147 | u64 kvm_get_apic_base(struct kvm_vcpu *vcpu) |
148 | { | |
149 | if (irqchip_in_kernel(vcpu->kvm)) | |
ad312c7c | 150 | return vcpu->arch.apic_base; |
6866b83e | 151 | else |
ad312c7c | 152 | return vcpu->arch.apic_base; |
6866b83e CO |
153 | } |
154 | EXPORT_SYMBOL_GPL(kvm_get_apic_base); | |
155 | ||
156 | void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data) | |
157 | { | |
158 | /* TODO: reserve bits check */ | |
159 | if (irqchip_in_kernel(vcpu->kvm)) | |
160 | kvm_lapic_set_base(vcpu, data); | |
161 | else | |
ad312c7c | 162 | vcpu->arch.apic_base = data; |
6866b83e CO |
163 | } |
164 | EXPORT_SYMBOL_GPL(kvm_set_apic_base); | |
165 | ||
298101da AK |
166 | void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
167 | { | |
ad312c7c ZX |
168 | WARN_ON(vcpu->arch.exception.pending); |
169 | vcpu->arch.exception.pending = true; | |
170 | vcpu->arch.exception.has_error_code = false; | |
171 | vcpu->arch.exception.nr = nr; | |
298101da AK |
172 | } |
173 | EXPORT_SYMBOL_GPL(kvm_queue_exception); | |
174 | ||
c3c91fee AK |
175 | void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long addr, |
176 | u32 error_code) | |
177 | { | |
178 | ++vcpu->stat.pf_guest; | |
d8017474 | 179 | |
71c4dfaf JR |
180 | if (vcpu->arch.exception.pending) { |
181 | if (vcpu->arch.exception.nr == PF_VECTOR) { | |
182 | printk(KERN_DEBUG "kvm: inject_page_fault:" | |
183 | " double fault 0x%lx\n", addr); | |
184 | vcpu->arch.exception.nr = DF_VECTOR; | |
185 | vcpu->arch.exception.error_code = 0; | |
186 | } else if (vcpu->arch.exception.nr == DF_VECTOR) { | |
187 | /* triple fault -> shutdown */ | |
188 | set_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests); | |
189 | } | |
c3c91fee AK |
190 | return; |
191 | } | |
ad312c7c | 192 | vcpu->arch.cr2 = addr; |
c3c91fee AK |
193 | kvm_queue_exception_e(vcpu, PF_VECTOR, error_code); |
194 | } | |
195 | ||
3419ffc8 SY |
196 | void kvm_inject_nmi(struct kvm_vcpu *vcpu) |
197 | { | |
198 | vcpu->arch.nmi_pending = 1; | |
199 | } | |
200 | EXPORT_SYMBOL_GPL(kvm_inject_nmi); | |
201 | ||
298101da AK |
202 | void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
203 | { | |
ad312c7c ZX |
204 | WARN_ON(vcpu->arch.exception.pending); |
205 | vcpu->arch.exception.pending = true; | |
206 | vcpu->arch.exception.has_error_code = true; | |
207 | vcpu->arch.exception.nr = nr; | |
208 | vcpu->arch.exception.error_code = error_code; | |
298101da AK |
209 | } |
210 | EXPORT_SYMBOL_GPL(kvm_queue_exception_e); | |
211 | ||
212 | static void __queue_exception(struct kvm_vcpu *vcpu) | |
213 | { | |
ad312c7c ZX |
214 | kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr, |
215 | vcpu->arch.exception.has_error_code, | |
216 | vcpu->arch.exception.error_code); | |
298101da AK |
217 | } |
218 | ||
a03490ed CO |
219 | /* |
220 | * Load the pae pdptrs. Return true is they are all valid. | |
221 | */ | |
222 | int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3) | |
223 | { | |
224 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; | |
225 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; | |
226 | int i; | |
227 | int ret; | |
ad312c7c | 228 | u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)]; |
a03490ed | 229 | |
a03490ed CO |
230 | ret = kvm_read_guest_page(vcpu->kvm, pdpt_gfn, pdpte, |
231 | offset * sizeof(u64), sizeof(pdpte)); | |
232 | if (ret < 0) { | |
233 | ret = 0; | |
234 | goto out; | |
235 | } | |
236 | for (i = 0; i < ARRAY_SIZE(pdpte); ++i) { | |
237 | if ((pdpte[i] & 1) && (pdpte[i] & 0xfffffff0000001e6ull)) { | |
238 | ret = 0; | |
239 | goto out; | |
240 | } | |
241 | } | |
242 | ret = 1; | |
243 | ||
ad312c7c | 244 | memcpy(vcpu->arch.pdptrs, pdpte, sizeof(vcpu->arch.pdptrs)); |
a03490ed | 245 | out: |
a03490ed CO |
246 | |
247 | return ret; | |
248 | } | |
cc4b6871 | 249 | EXPORT_SYMBOL_GPL(load_pdptrs); |
a03490ed | 250 | |
d835dfec AK |
251 | static bool pdptrs_changed(struct kvm_vcpu *vcpu) |
252 | { | |
ad312c7c | 253 | u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)]; |
d835dfec AK |
254 | bool changed = true; |
255 | int r; | |
256 | ||
257 | if (is_long_mode(vcpu) || !is_pae(vcpu)) | |
258 | return false; | |
259 | ||
ad312c7c | 260 | r = kvm_read_guest(vcpu->kvm, vcpu->arch.cr3 & ~31u, pdpte, sizeof(pdpte)); |
d835dfec AK |
261 | if (r < 0) |
262 | goto out; | |
ad312c7c | 263 | changed = memcmp(pdpte, vcpu->arch.pdptrs, sizeof(pdpte)) != 0; |
d835dfec | 264 | out: |
d835dfec AK |
265 | |
266 | return changed; | |
267 | } | |
268 | ||
2d3ad1f4 | 269 | void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
a03490ed CO |
270 | { |
271 | if (cr0 & CR0_RESERVED_BITS) { | |
272 | printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n", | |
ad312c7c | 273 | cr0, vcpu->arch.cr0); |
c1a5d4f9 | 274 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
275 | return; |
276 | } | |
277 | ||
278 | if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) { | |
279 | printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n"); | |
c1a5d4f9 | 280 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
281 | return; |
282 | } | |
283 | ||
284 | if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) { | |
285 | printk(KERN_DEBUG "set_cr0: #GP, set PG flag " | |
286 | "and a clear PE flag\n"); | |
c1a5d4f9 | 287 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
288 | return; |
289 | } | |
290 | ||
291 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { | |
292 | #ifdef CONFIG_X86_64 | |
ad312c7c | 293 | if ((vcpu->arch.shadow_efer & EFER_LME)) { |
a03490ed CO |
294 | int cs_db, cs_l; |
295 | ||
296 | if (!is_pae(vcpu)) { | |
297 | printk(KERN_DEBUG "set_cr0: #GP, start paging " | |
298 | "in long mode while PAE is disabled\n"); | |
c1a5d4f9 | 299 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
300 | return; |
301 | } | |
302 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
303 | if (cs_l) { | |
304 | printk(KERN_DEBUG "set_cr0: #GP, start paging " | |
305 | "in long mode while CS.L == 1\n"); | |
c1a5d4f9 | 306 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
307 | return; |
308 | ||
309 | } | |
310 | } else | |
311 | #endif | |
ad312c7c | 312 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.cr3)) { |
a03490ed CO |
313 | printk(KERN_DEBUG "set_cr0: #GP, pdptrs " |
314 | "reserved bits\n"); | |
c1a5d4f9 | 315 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
316 | return; |
317 | } | |
318 | ||
319 | } | |
320 | ||
321 | kvm_x86_ops->set_cr0(vcpu, cr0); | |
ad312c7c | 322 | vcpu->arch.cr0 = cr0; |
a03490ed | 323 | |
6cffe8ca | 324 | kvm_mmu_sync_global(vcpu); |
a03490ed | 325 | kvm_mmu_reset_context(vcpu); |
a03490ed CO |
326 | return; |
327 | } | |
2d3ad1f4 | 328 | EXPORT_SYMBOL_GPL(kvm_set_cr0); |
a03490ed | 329 | |
2d3ad1f4 | 330 | void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw) |
a03490ed | 331 | { |
2d3ad1f4 | 332 | kvm_set_cr0(vcpu, (vcpu->arch.cr0 & ~0x0ful) | (msw & 0x0f)); |
2714d1d3 FEL |
333 | KVMTRACE_1D(LMSW, vcpu, |
334 | (u32)((vcpu->arch.cr0 & ~0x0ful) | (msw & 0x0f)), | |
335 | handler); | |
a03490ed | 336 | } |
2d3ad1f4 | 337 | EXPORT_SYMBOL_GPL(kvm_lmsw); |
a03490ed | 338 | |
2d3ad1f4 | 339 | void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
a03490ed | 340 | { |
a2edf57f AK |
341 | unsigned long old_cr4 = vcpu->arch.cr4; |
342 | unsigned long pdptr_bits = X86_CR4_PGE | X86_CR4_PSE | X86_CR4_PAE; | |
343 | ||
a03490ed CO |
344 | if (cr4 & CR4_RESERVED_BITS) { |
345 | printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n"); | |
c1a5d4f9 | 346 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
347 | return; |
348 | } | |
349 | ||
350 | if (is_long_mode(vcpu)) { | |
351 | if (!(cr4 & X86_CR4_PAE)) { | |
352 | printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while " | |
353 | "in long mode\n"); | |
c1a5d4f9 | 354 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
355 | return; |
356 | } | |
a2edf57f AK |
357 | } else if (is_paging(vcpu) && (cr4 & X86_CR4_PAE) |
358 | && ((cr4 ^ old_cr4) & pdptr_bits) | |
ad312c7c | 359 | && !load_pdptrs(vcpu, vcpu->arch.cr3)) { |
a03490ed | 360 | printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n"); |
c1a5d4f9 | 361 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
362 | return; |
363 | } | |
364 | ||
365 | if (cr4 & X86_CR4_VMXE) { | |
366 | printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n"); | |
c1a5d4f9 | 367 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
368 | return; |
369 | } | |
370 | kvm_x86_ops->set_cr4(vcpu, cr4); | |
ad312c7c | 371 | vcpu->arch.cr4 = cr4; |
5a41accd | 372 | vcpu->arch.mmu.base_role.cr4_pge = (cr4 & X86_CR4_PGE) && !tdp_enabled; |
6cffe8ca | 373 | kvm_mmu_sync_global(vcpu); |
a03490ed | 374 | kvm_mmu_reset_context(vcpu); |
a03490ed | 375 | } |
2d3ad1f4 | 376 | EXPORT_SYMBOL_GPL(kvm_set_cr4); |
a03490ed | 377 | |
2d3ad1f4 | 378 | void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
a03490ed | 379 | { |
ad312c7c | 380 | if (cr3 == vcpu->arch.cr3 && !pdptrs_changed(vcpu)) { |
0ba73cda | 381 | kvm_mmu_sync_roots(vcpu); |
d835dfec AK |
382 | kvm_mmu_flush_tlb(vcpu); |
383 | return; | |
384 | } | |
385 | ||
a03490ed CO |
386 | if (is_long_mode(vcpu)) { |
387 | if (cr3 & CR3_L_MODE_RESERVED_BITS) { | |
388 | printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n"); | |
c1a5d4f9 | 389 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
390 | return; |
391 | } | |
392 | } else { | |
393 | if (is_pae(vcpu)) { | |
394 | if (cr3 & CR3_PAE_RESERVED_BITS) { | |
395 | printk(KERN_DEBUG | |
396 | "set_cr3: #GP, reserved bits\n"); | |
c1a5d4f9 | 397 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
398 | return; |
399 | } | |
400 | if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) { | |
401 | printk(KERN_DEBUG "set_cr3: #GP, pdptrs " | |
402 | "reserved bits\n"); | |
c1a5d4f9 | 403 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
404 | return; |
405 | } | |
406 | } | |
407 | /* | |
408 | * We don't check reserved bits in nonpae mode, because | |
409 | * this isn't enforced, and VMware depends on this. | |
410 | */ | |
411 | } | |
412 | ||
a03490ed CO |
413 | /* |
414 | * Does the new cr3 value map to physical memory? (Note, we | |
415 | * catch an invalid cr3 even in real-mode, because it would | |
416 | * cause trouble later on when we turn on paging anyway.) | |
417 | * | |
418 | * A real CPU would silently accept an invalid cr3 and would | |
419 | * attempt to use it - with largely undefined (and often hard | |
420 | * to debug) behavior on the guest side. | |
421 | */ | |
422 | if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT))) | |
c1a5d4f9 | 423 | kvm_inject_gp(vcpu, 0); |
a03490ed | 424 | else { |
ad312c7c ZX |
425 | vcpu->arch.cr3 = cr3; |
426 | vcpu->arch.mmu.new_cr3(vcpu); | |
a03490ed | 427 | } |
a03490ed | 428 | } |
2d3ad1f4 | 429 | EXPORT_SYMBOL_GPL(kvm_set_cr3); |
a03490ed | 430 | |
2d3ad1f4 | 431 | void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) |
a03490ed CO |
432 | { |
433 | if (cr8 & CR8_RESERVED_BITS) { | |
434 | printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8); | |
c1a5d4f9 | 435 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
436 | return; |
437 | } | |
438 | if (irqchip_in_kernel(vcpu->kvm)) | |
439 | kvm_lapic_set_tpr(vcpu, cr8); | |
440 | else | |
ad312c7c | 441 | vcpu->arch.cr8 = cr8; |
a03490ed | 442 | } |
2d3ad1f4 | 443 | EXPORT_SYMBOL_GPL(kvm_set_cr8); |
a03490ed | 444 | |
2d3ad1f4 | 445 | unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu) |
a03490ed CO |
446 | { |
447 | if (irqchip_in_kernel(vcpu->kvm)) | |
448 | return kvm_lapic_get_cr8(vcpu); | |
449 | else | |
ad312c7c | 450 | return vcpu->arch.cr8; |
a03490ed | 451 | } |
2d3ad1f4 | 452 | EXPORT_SYMBOL_GPL(kvm_get_cr8); |
a03490ed | 453 | |
d8017474 AG |
454 | static inline u32 bit(int bitno) |
455 | { | |
456 | return 1 << (bitno & 31); | |
457 | } | |
458 | ||
043405e1 CO |
459 | /* |
460 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS | |
461 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. | |
462 | * | |
463 | * This list is modified at module load time to reflect the | |
464 | * capabilities of the host cpu. | |
465 | */ | |
466 | static u32 msrs_to_save[] = { | |
467 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, | |
468 | MSR_K6_STAR, | |
469 | #ifdef CONFIG_X86_64 | |
470 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, | |
471 | #endif | |
18068523 | 472 | MSR_IA32_TIME_STAMP_COUNTER, MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK, |
b286d5d8 | 473 | MSR_IA32_PERF_STATUS, MSR_IA32_CR_PAT, MSR_VM_HSAVE_PA |
043405e1 CO |
474 | }; |
475 | ||
476 | static unsigned num_msrs_to_save; | |
477 | ||
478 | static u32 emulated_msrs[] = { | |
479 | MSR_IA32_MISC_ENABLE, | |
480 | }; | |
481 | ||
15c4a640 CO |
482 | static void set_efer(struct kvm_vcpu *vcpu, u64 efer) |
483 | { | |
f2b4b7dd | 484 | if (efer & efer_reserved_bits) { |
15c4a640 CO |
485 | printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n", |
486 | efer); | |
c1a5d4f9 | 487 | kvm_inject_gp(vcpu, 0); |
15c4a640 CO |
488 | return; |
489 | } | |
490 | ||
491 | if (is_paging(vcpu) | |
ad312c7c | 492 | && (vcpu->arch.shadow_efer & EFER_LME) != (efer & EFER_LME)) { |
15c4a640 | 493 | printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n"); |
c1a5d4f9 | 494 | kvm_inject_gp(vcpu, 0); |
15c4a640 CO |
495 | return; |
496 | } | |
497 | ||
1b2fd70c AG |
498 | if (efer & EFER_FFXSR) { |
499 | struct kvm_cpuid_entry2 *feat; | |
500 | ||
501 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
502 | if (!feat || !(feat->edx & bit(X86_FEATURE_FXSR_OPT))) { | |
503 | printk(KERN_DEBUG "set_efer: #GP, enable FFXSR w/o CPUID capability\n"); | |
504 | kvm_inject_gp(vcpu, 0); | |
505 | return; | |
506 | } | |
507 | } | |
508 | ||
d8017474 AG |
509 | if (efer & EFER_SVME) { |
510 | struct kvm_cpuid_entry2 *feat; | |
511 | ||
512 | feat = kvm_find_cpuid_entry(vcpu, 0x80000001, 0); | |
513 | if (!feat || !(feat->ecx & bit(X86_FEATURE_SVM))) { | |
514 | printk(KERN_DEBUG "set_efer: #GP, enable SVM w/o SVM\n"); | |
515 | kvm_inject_gp(vcpu, 0); | |
516 | return; | |
517 | } | |
518 | } | |
519 | ||
15c4a640 CO |
520 | kvm_x86_ops->set_efer(vcpu, efer); |
521 | ||
522 | efer &= ~EFER_LMA; | |
ad312c7c | 523 | efer |= vcpu->arch.shadow_efer & EFER_LMA; |
15c4a640 | 524 | |
ad312c7c | 525 | vcpu->arch.shadow_efer = efer; |
9645bb56 AK |
526 | |
527 | vcpu->arch.mmu.base_role.nxe = (efer & EFER_NX) && !tdp_enabled; | |
528 | kvm_mmu_reset_context(vcpu); | |
15c4a640 CO |
529 | } |
530 | ||
f2b4b7dd JR |
531 | void kvm_enable_efer_bits(u64 mask) |
532 | { | |
533 | efer_reserved_bits &= ~mask; | |
534 | } | |
535 | EXPORT_SYMBOL_GPL(kvm_enable_efer_bits); | |
536 | ||
537 | ||
15c4a640 CO |
538 | /* |
539 | * Writes msr value into into the appropriate "register". | |
540 | * Returns 0 on success, non-0 otherwise. | |
541 | * Assumes vcpu_load() was already called. | |
542 | */ | |
543 | int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) | |
544 | { | |
545 | return kvm_x86_ops->set_msr(vcpu, msr_index, data); | |
546 | } | |
547 | ||
313a3dc7 CO |
548 | /* |
549 | * Adapt set_msr() to msr_io()'s calling convention | |
550 | */ | |
551 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) | |
552 | { | |
553 | return kvm_set_msr(vcpu, index, *data); | |
554 | } | |
555 | ||
18068523 GOC |
556 | static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock) |
557 | { | |
558 | static int version; | |
50d0a0f9 GH |
559 | struct pvclock_wall_clock wc; |
560 | struct timespec now, sys, boot; | |
18068523 GOC |
561 | |
562 | if (!wall_clock) | |
563 | return; | |
564 | ||
565 | version++; | |
566 | ||
18068523 GOC |
567 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); |
568 | ||
50d0a0f9 GH |
569 | /* |
570 | * The guest calculates current wall clock time by adding | |
571 | * system time (updated by kvm_write_guest_time below) to the | |
572 | * wall clock specified here. guest system time equals host | |
573 | * system time for us, thus we must fill in host boot time here. | |
574 | */ | |
575 | now = current_kernel_time(); | |
576 | ktime_get_ts(&sys); | |
577 | boot = ns_to_timespec(timespec_to_ns(&now) - timespec_to_ns(&sys)); | |
578 | ||
579 | wc.sec = boot.tv_sec; | |
580 | wc.nsec = boot.tv_nsec; | |
581 | wc.version = version; | |
18068523 GOC |
582 | |
583 | kvm_write_guest(kvm, wall_clock, &wc, sizeof(wc)); | |
584 | ||
585 | version++; | |
586 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); | |
18068523 GOC |
587 | } |
588 | ||
50d0a0f9 GH |
589 | static uint32_t div_frac(uint32_t dividend, uint32_t divisor) |
590 | { | |
591 | uint32_t quotient, remainder; | |
592 | ||
593 | /* Don't try to replace with do_div(), this one calculates | |
594 | * "(dividend << 32) / divisor" */ | |
595 | __asm__ ( "divl %4" | |
596 | : "=a" (quotient), "=d" (remainder) | |
597 | : "0" (0), "1" (dividend), "r" (divisor) ); | |
598 | return quotient; | |
599 | } | |
600 | ||
601 | static void kvm_set_time_scale(uint32_t tsc_khz, struct pvclock_vcpu_time_info *hv_clock) | |
602 | { | |
603 | uint64_t nsecs = 1000000000LL; | |
604 | int32_t shift = 0; | |
605 | uint64_t tps64; | |
606 | uint32_t tps32; | |
607 | ||
608 | tps64 = tsc_khz * 1000LL; | |
609 | while (tps64 > nsecs*2) { | |
610 | tps64 >>= 1; | |
611 | shift--; | |
612 | } | |
613 | ||
614 | tps32 = (uint32_t)tps64; | |
615 | while (tps32 <= (uint32_t)nsecs) { | |
616 | tps32 <<= 1; | |
617 | shift++; | |
618 | } | |
619 | ||
620 | hv_clock->tsc_shift = shift; | |
621 | hv_clock->tsc_to_system_mul = div_frac(nsecs, tps32); | |
622 | ||
623 | pr_debug("%s: tsc_khz %u, tsc_shift %d, tsc_mul %u\n", | |
80a914dc | 624 | __func__, tsc_khz, hv_clock->tsc_shift, |
50d0a0f9 GH |
625 | hv_clock->tsc_to_system_mul); |
626 | } | |
627 | ||
c8076604 GH |
628 | static DEFINE_PER_CPU(unsigned long, cpu_tsc_khz); |
629 | ||
18068523 GOC |
630 | static void kvm_write_guest_time(struct kvm_vcpu *v) |
631 | { | |
632 | struct timespec ts; | |
633 | unsigned long flags; | |
634 | struct kvm_vcpu_arch *vcpu = &v->arch; | |
635 | void *shared_kaddr; | |
636 | ||
637 | if ((!vcpu->time_page)) | |
638 | return; | |
639 | ||
2dea4c84 | 640 | preempt_disable(); |
c8076604 GH |
641 | if (unlikely(vcpu->hv_clock_tsc_khz != __get_cpu_var(cpu_tsc_khz))) { |
642 | kvm_set_time_scale(__get_cpu_var(cpu_tsc_khz), &vcpu->hv_clock); | |
643 | vcpu->hv_clock_tsc_khz = __get_cpu_var(cpu_tsc_khz); | |
50d0a0f9 | 644 | } |
2dea4c84 | 645 | preempt_enable(); |
50d0a0f9 | 646 | |
18068523 GOC |
647 | /* Keep irq disabled to prevent changes to the clock */ |
648 | local_irq_save(flags); | |
649 | kvm_get_msr(v, MSR_IA32_TIME_STAMP_COUNTER, | |
650 | &vcpu->hv_clock.tsc_timestamp); | |
651 | ktime_get_ts(&ts); | |
652 | local_irq_restore(flags); | |
653 | ||
654 | /* With all the info we got, fill in the values */ | |
655 | ||
656 | vcpu->hv_clock.system_time = ts.tv_nsec + | |
657 | (NSEC_PER_SEC * (u64)ts.tv_sec); | |
658 | /* | |
659 | * The interface expects us to write an even number signaling that the | |
660 | * update is finished. Since the guest won't see the intermediate | |
50d0a0f9 | 661 | * state, we just increase by 2 at the end. |
18068523 | 662 | */ |
50d0a0f9 | 663 | vcpu->hv_clock.version += 2; |
18068523 GOC |
664 | |
665 | shared_kaddr = kmap_atomic(vcpu->time_page, KM_USER0); | |
666 | ||
667 | memcpy(shared_kaddr + vcpu->time_offset, &vcpu->hv_clock, | |
50d0a0f9 | 668 | sizeof(vcpu->hv_clock)); |
18068523 GOC |
669 | |
670 | kunmap_atomic(shared_kaddr, KM_USER0); | |
671 | ||
672 | mark_page_dirty(v->kvm, vcpu->time >> PAGE_SHIFT); | |
673 | } | |
674 | ||
c8076604 GH |
675 | static int kvm_request_guest_time_update(struct kvm_vcpu *v) |
676 | { | |
677 | struct kvm_vcpu_arch *vcpu = &v->arch; | |
678 | ||
679 | if (!vcpu->time_page) | |
680 | return 0; | |
681 | set_bit(KVM_REQ_KVMCLOCK_UPDATE, &v->requests); | |
682 | return 1; | |
683 | } | |
684 | ||
9ba075a6 AK |
685 | static bool msr_mtrr_valid(unsigned msr) |
686 | { | |
687 | switch (msr) { | |
688 | case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR - 1: | |
689 | case MSR_MTRRfix64K_00000: | |
690 | case MSR_MTRRfix16K_80000: | |
691 | case MSR_MTRRfix16K_A0000: | |
692 | case MSR_MTRRfix4K_C0000: | |
693 | case MSR_MTRRfix4K_C8000: | |
694 | case MSR_MTRRfix4K_D0000: | |
695 | case MSR_MTRRfix4K_D8000: | |
696 | case MSR_MTRRfix4K_E0000: | |
697 | case MSR_MTRRfix4K_E8000: | |
698 | case MSR_MTRRfix4K_F0000: | |
699 | case MSR_MTRRfix4K_F8000: | |
700 | case MSR_MTRRdefType: | |
701 | case MSR_IA32_CR_PAT: | |
702 | return true; | |
703 | case 0x2f8: | |
704 | return true; | |
705 | } | |
706 | return false; | |
707 | } | |
708 | ||
709 | static int set_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
710 | { | |
0bed3b56 SY |
711 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
712 | ||
9ba075a6 AK |
713 | if (!msr_mtrr_valid(msr)) |
714 | return 1; | |
715 | ||
0bed3b56 SY |
716 | if (msr == MSR_MTRRdefType) { |
717 | vcpu->arch.mtrr_state.def_type = data; | |
718 | vcpu->arch.mtrr_state.enabled = (data & 0xc00) >> 10; | |
719 | } else if (msr == MSR_MTRRfix64K_00000) | |
720 | p[0] = data; | |
721 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) | |
722 | p[1 + msr - MSR_MTRRfix16K_80000] = data; | |
723 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) | |
724 | p[3 + msr - MSR_MTRRfix4K_C0000] = data; | |
725 | else if (msr == MSR_IA32_CR_PAT) | |
726 | vcpu->arch.pat = data; | |
727 | else { /* Variable MTRRs */ | |
728 | int idx, is_mtrr_mask; | |
729 | u64 *pt; | |
730 | ||
731 | idx = (msr - 0x200) / 2; | |
732 | is_mtrr_mask = msr - 0x200 - 2 * idx; | |
733 | if (!is_mtrr_mask) | |
734 | pt = | |
735 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; | |
736 | else | |
737 | pt = | |
738 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; | |
739 | *pt = data; | |
740 | } | |
741 | ||
742 | kvm_mmu_reset_context(vcpu); | |
9ba075a6 AK |
743 | return 0; |
744 | } | |
15c4a640 CO |
745 | |
746 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
747 | { | |
748 | switch (msr) { | |
15c4a640 CO |
749 | case MSR_EFER: |
750 | set_efer(vcpu, data); | |
751 | break; | |
15c4a640 CO |
752 | case MSR_IA32_MC0_STATUS: |
753 | pr_unimpl(vcpu, "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n", | |
b8688d51 | 754 | __func__, data); |
15c4a640 CO |
755 | break; |
756 | case MSR_IA32_MCG_STATUS: | |
757 | pr_unimpl(vcpu, "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n", | |
b8688d51 | 758 | __func__, data); |
15c4a640 | 759 | break; |
c7ac679c JR |
760 | case MSR_IA32_MCG_CTL: |
761 | pr_unimpl(vcpu, "%s: MSR_IA32_MCG_CTL 0x%llx, nop\n", | |
b8688d51 | 762 | __func__, data); |
c7ac679c | 763 | break; |
b5e2fec0 AG |
764 | case MSR_IA32_DEBUGCTLMSR: |
765 | if (!data) { | |
766 | /* We support the non-activated case already */ | |
767 | break; | |
768 | } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) { | |
769 | /* Values other than LBR and BTF are vendor-specific, | |
770 | thus reserved and should throw a #GP */ | |
771 | return 1; | |
772 | } | |
773 | pr_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n", | |
774 | __func__, data); | |
775 | break; | |
15c4a640 CO |
776 | case MSR_IA32_UCODE_REV: |
777 | case MSR_IA32_UCODE_WRITE: | |
61a6bd67 | 778 | case MSR_VM_HSAVE_PA: |
15c4a640 | 779 | break; |
9ba075a6 AK |
780 | case 0x200 ... 0x2ff: |
781 | return set_msr_mtrr(vcpu, msr, data); | |
15c4a640 CO |
782 | case MSR_IA32_APICBASE: |
783 | kvm_set_apic_base(vcpu, data); | |
784 | break; | |
785 | case MSR_IA32_MISC_ENABLE: | |
ad312c7c | 786 | vcpu->arch.ia32_misc_enable_msr = data; |
15c4a640 | 787 | break; |
18068523 GOC |
788 | case MSR_KVM_WALL_CLOCK: |
789 | vcpu->kvm->arch.wall_clock = data; | |
790 | kvm_write_wall_clock(vcpu->kvm, data); | |
791 | break; | |
792 | case MSR_KVM_SYSTEM_TIME: { | |
793 | if (vcpu->arch.time_page) { | |
794 | kvm_release_page_dirty(vcpu->arch.time_page); | |
795 | vcpu->arch.time_page = NULL; | |
796 | } | |
797 | ||
798 | vcpu->arch.time = data; | |
799 | ||
800 | /* we verify if the enable bit is set... */ | |
801 | if (!(data & 1)) | |
802 | break; | |
803 | ||
804 | /* ...but clean it before doing the actual write */ | |
805 | vcpu->arch.time_offset = data & ~(PAGE_MASK | 1); | |
806 | ||
18068523 GOC |
807 | vcpu->arch.time_page = |
808 | gfn_to_page(vcpu->kvm, data >> PAGE_SHIFT); | |
18068523 GOC |
809 | |
810 | if (is_error_page(vcpu->arch.time_page)) { | |
811 | kvm_release_page_clean(vcpu->arch.time_page); | |
812 | vcpu->arch.time_page = NULL; | |
813 | } | |
814 | ||
c8076604 | 815 | kvm_request_guest_time_update(vcpu); |
18068523 GOC |
816 | break; |
817 | } | |
15c4a640 | 818 | default: |
565f1fbd | 819 | pr_unimpl(vcpu, "unhandled wrmsr: 0x%x data %llx\n", msr, data); |
15c4a640 CO |
820 | return 1; |
821 | } | |
822 | return 0; | |
823 | } | |
824 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); | |
825 | ||
826 | ||
827 | /* | |
828 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
829 | * Returns 0 on success, non-0 otherwise. | |
830 | * Assumes vcpu_load() was already called. | |
831 | */ | |
832 | int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) | |
833 | { | |
834 | return kvm_x86_ops->get_msr(vcpu, msr_index, pdata); | |
835 | } | |
836 | ||
9ba075a6 AK |
837 | static int get_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
838 | { | |
0bed3b56 SY |
839 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
840 | ||
9ba075a6 AK |
841 | if (!msr_mtrr_valid(msr)) |
842 | return 1; | |
843 | ||
0bed3b56 SY |
844 | if (msr == MSR_MTRRdefType) |
845 | *pdata = vcpu->arch.mtrr_state.def_type + | |
846 | (vcpu->arch.mtrr_state.enabled << 10); | |
847 | else if (msr == MSR_MTRRfix64K_00000) | |
848 | *pdata = p[0]; | |
849 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) | |
850 | *pdata = p[1 + msr - MSR_MTRRfix16K_80000]; | |
851 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) | |
852 | *pdata = p[3 + msr - MSR_MTRRfix4K_C0000]; | |
853 | else if (msr == MSR_IA32_CR_PAT) | |
854 | *pdata = vcpu->arch.pat; | |
855 | else { /* Variable MTRRs */ | |
856 | int idx, is_mtrr_mask; | |
857 | u64 *pt; | |
858 | ||
859 | idx = (msr - 0x200) / 2; | |
860 | is_mtrr_mask = msr - 0x200 - 2 * idx; | |
861 | if (!is_mtrr_mask) | |
862 | pt = | |
863 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; | |
864 | else | |
865 | pt = | |
866 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; | |
867 | *pdata = *pt; | |
868 | } | |
869 | ||
9ba075a6 AK |
870 | return 0; |
871 | } | |
872 | ||
15c4a640 CO |
873 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
874 | { | |
875 | u64 data; | |
876 | ||
877 | switch (msr) { | |
878 | case 0xc0010010: /* SYSCFG */ | |
879 | case 0xc0010015: /* HWCR */ | |
880 | case MSR_IA32_PLATFORM_ID: | |
881 | case MSR_IA32_P5_MC_ADDR: | |
882 | case MSR_IA32_P5_MC_TYPE: | |
883 | case MSR_IA32_MC0_CTL: | |
884 | case MSR_IA32_MCG_STATUS: | |
885 | case MSR_IA32_MCG_CAP: | |
c7ac679c | 886 | case MSR_IA32_MCG_CTL: |
15c4a640 CO |
887 | case MSR_IA32_MC0_MISC: |
888 | case MSR_IA32_MC0_MISC+4: | |
889 | case MSR_IA32_MC0_MISC+8: | |
890 | case MSR_IA32_MC0_MISC+12: | |
891 | case MSR_IA32_MC0_MISC+16: | |
a89c1ad2 | 892 | case MSR_IA32_MC0_MISC+20: |
15c4a640 | 893 | case MSR_IA32_UCODE_REV: |
15c4a640 | 894 | case MSR_IA32_EBL_CR_POWERON: |
b5e2fec0 AG |
895 | case MSR_IA32_DEBUGCTLMSR: |
896 | case MSR_IA32_LASTBRANCHFROMIP: | |
897 | case MSR_IA32_LASTBRANCHTOIP: | |
898 | case MSR_IA32_LASTINTFROMIP: | |
899 | case MSR_IA32_LASTINTTOIP: | |
61a6bd67 | 900 | case MSR_VM_HSAVE_PA: |
7fe29e0f AS |
901 | case MSR_P6_EVNTSEL0: |
902 | case MSR_P6_EVNTSEL1: | |
15c4a640 CO |
903 | data = 0; |
904 | break; | |
9ba075a6 AK |
905 | case MSR_MTRRcap: |
906 | data = 0x500 | KVM_NR_VAR_MTRR; | |
907 | break; | |
908 | case 0x200 ... 0x2ff: | |
909 | return get_msr_mtrr(vcpu, msr, pdata); | |
15c4a640 CO |
910 | case 0xcd: /* fsb frequency */ |
911 | data = 3; | |
912 | break; | |
913 | case MSR_IA32_APICBASE: | |
914 | data = kvm_get_apic_base(vcpu); | |
915 | break; | |
916 | case MSR_IA32_MISC_ENABLE: | |
ad312c7c | 917 | data = vcpu->arch.ia32_misc_enable_msr; |
15c4a640 | 918 | break; |
847f0ad8 AG |
919 | case MSR_IA32_PERF_STATUS: |
920 | /* TSC increment by tick */ | |
921 | data = 1000ULL; | |
922 | /* CPU multiplier */ | |
923 | data |= (((uint64_t)4ULL) << 40); | |
924 | break; | |
15c4a640 | 925 | case MSR_EFER: |
ad312c7c | 926 | data = vcpu->arch.shadow_efer; |
15c4a640 | 927 | break; |
18068523 GOC |
928 | case MSR_KVM_WALL_CLOCK: |
929 | data = vcpu->kvm->arch.wall_clock; | |
930 | break; | |
931 | case MSR_KVM_SYSTEM_TIME: | |
932 | data = vcpu->arch.time; | |
933 | break; | |
15c4a640 CO |
934 | default: |
935 | pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr); | |
936 | return 1; | |
937 | } | |
938 | *pdata = data; | |
939 | return 0; | |
940 | } | |
941 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); | |
942 | ||
313a3dc7 CO |
943 | /* |
944 | * Read or write a bunch of msrs. All parameters are kernel addresses. | |
945 | * | |
946 | * @return number of msrs set successfully. | |
947 | */ | |
948 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, | |
949 | struct kvm_msr_entry *entries, | |
950 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
951 | unsigned index, u64 *data)) | |
952 | { | |
953 | int i; | |
954 | ||
955 | vcpu_load(vcpu); | |
956 | ||
3200f405 | 957 | down_read(&vcpu->kvm->slots_lock); |
313a3dc7 CO |
958 | for (i = 0; i < msrs->nmsrs; ++i) |
959 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) | |
960 | break; | |
3200f405 | 961 | up_read(&vcpu->kvm->slots_lock); |
313a3dc7 CO |
962 | |
963 | vcpu_put(vcpu); | |
964 | ||
965 | return i; | |
966 | } | |
967 | ||
968 | /* | |
969 | * Read or write a bunch of msrs. Parameters are user addresses. | |
970 | * | |
971 | * @return number of msrs set successfully. | |
972 | */ | |
973 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, | |
974 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
975 | unsigned index, u64 *data), | |
976 | int writeback) | |
977 | { | |
978 | struct kvm_msrs msrs; | |
979 | struct kvm_msr_entry *entries; | |
980 | int r, n; | |
981 | unsigned size; | |
982 | ||
983 | r = -EFAULT; | |
984 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) | |
985 | goto out; | |
986 | ||
987 | r = -E2BIG; | |
988 | if (msrs.nmsrs >= MAX_IO_MSRS) | |
989 | goto out; | |
990 | ||
991 | r = -ENOMEM; | |
992 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; | |
993 | entries = vmalloc(size); | |
994 | if (!entries) | |
995 | goto out; | |
996 | ||
997 | r = -EFAULT; | |
998 | if (copy_from_user(entries, user_msrs->entries, size)) | |
999 | goto out_free; | |
1000 | ||
1001 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); | |
1002 | if (r < 0) | |
1003 | goto out_free; | |
1004 | ||
1005 | r = -EFAULT; | |
1006 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) | |
1007 | goto out_free; | |
1008 | ||
1009 | r = n; | |
1010 | ||
1011 | out_free: | |
1012 | vfree(entries); | |
1013 | out: | |
1014 | return r; | |
1015 | } | |
1016 | ||
018d00d2 ZX |
1017 | int kvm_dev_ioctl_check_extension(long ext) |
1018 | { | |
1019 | int r; | |
1020 | ||
1021 | switch (ext) { | |
1022 | case KVM_CAP_IRQCHIP: | |
1023 | case KVM_CAP_HLT: | |
1024 | case KVM_CAP_MMU_SHADOW_CACHE_CONTROL: | |
018d00d2 | 1025 | case KVM_CAP_SET_TSS_ADDR: |
07716717 | 1026 | case KVM_CAP_EXT_CPUID: |
c8076604 | 1027 | case KVM_CAP_CLOCKSOURCE: |
7837699f | 1028 | case KVM_CAP_PIT: |
a28e4f5a | 1029 | case KVM_CAP_NOP_IO_DELAY: |
62d9f0db | 1030 | case KVM_CAP_MP_STATE: |
ed848624 | 1031 | case KVM_CAP_SYNC_MMU: |
52d939a0 | 1032 | case KVM_CAP_REINJECT_CONTROL: |
4925663a | 1033 | case KVM_CAP_IRQ_INJECT_STATUS: |
e56d532f | 1034 | case KVM_CAP_ASSIGN_DEV_IRQ: |
018d00d2 ZX |
1035 | r = 1; |
1036 | break; | |
542472b5 LV |
1037 | case KVM_CAP_COALESCED_MMIO: |
1038 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; | |
1039 | break; | |
774ead3a AK |
1040 | case KVM_CAP_VAPIC: |
1041 | r = !kvm_x86_ops->cpu_has_accelerated_tpr(); | |
1042 | break; | |
f725230a AK |
1043 | case KVM_CAP_NR_VCPUS: |
1044 | r = KVM_MAX_VCPUS; | |
1045 | break; | |
a988b910 AK |
1046 | case KVM_CAP_NR_MEMSLOTS: |
1047 | r = KVM_MEMORY_SLOTS; | |
1048 | break; | |
2f333bcb MT |
1049 | case KVM_CAP_PV_MMU: |
1050 | r = !tdp_enabled; | |
1051 | break; | |
62c476c7 | 1052 | case KVM_CAP_IOMMU: |
19de40a8 | 1053 | r = iommu_found(); |
62c476c7 | 1054 | break; |
018d00d2 ZX |
1055 | default: |
1056 | r = 0; | |
1057 | break; | |
1058 | } | |
1059 | return r; | |
1060 | ||
1061 | } | |
1062 | ||
043405e1 CO |
1063 | long kvm_arch_dev_ioctl(struct file *filp, |
1064 | unsigned int ioctl, unsigned long arg) | |
1065 | { | |
1066 | void __user *argp = (void __user *)arg; | |
1067 | long r; | |
1068 | ||
1069 | switch (ioctl) { | |
1070 | case KVM_GET_MSR_INDEX_LIST: { | |
1071 | struct kvm_msr_list __user *user_msr_list = argp; | |
1072 | struct kvm_msr_list msr_list; | |
1073 | unsigned n; | |
1074 | ||
1075 | r = -EFAULT; | |
1076 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) | |
1077 | goto out; | |
1078 | n = msr_list.nmsrs; | |
1079 | msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs); | |
1080 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) | |
1081 | goto out; | |
1082 | r = -E2BIG; | |
1083 | if (n < num_msrs_to_save) | |
1084 | goto out; | |
1085 | r = -EFAULT; | |
1086 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, | |
1087 | num_msrs_to_save * sizeof(u32))) | |
1088 | goto out; | |
1089 | if (copy_to_user(user_msr_list->indices | |
1090 | + num_msrs_to_save * sizeof(u32), | |
1091 | &emulated_msrs, | |
1092 | ARRAY_SIZE(emulated_msrs) * sizeof(u32))) | |
1093 | goto out; | |
1094 | r = 0; | |
1095 | break; | |
1096 | } | |
674eea0f AK |
1097 | case KVM_GET_SUPPORTED_CPUID: { |
1098 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
1099 | struct kvm_cpuid2 cpuid; | |
1100 | ||
1101 | r = -EFAULT; | |
1102 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
1103 | goto out; | |
1104 | r = kvm_dev_ioctl_get_supported_cpuid(&cpuid, | |
19355475 | 1105 | cpuid_arg->entries); |
674eea0f AK |
1106 | if (r) |
1107 | goto out; | |
1108 | ||
1109 | r = -EFAULT; | |
1110 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
1111 | goto out; | |
1112 | r = 0; | |
1113 | break; | |
1114 | } | |
043405e1 CO |
1115 | default: |
1116 | r = -EINVAL; | |
1117 | } | |
1118 | out: | |
1119 | return r; | |
1120 | } | |
1121 | ||
313a3dc7 CO |
1122 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
1123 | { | |
1124 | kvm_x86_ops->vcpu_load(vcpu, cpu); | |
c8076604 | 1125 | kvm_request_guest_time_update(vcpu); |
313a3dc7 CO |
1126 | } |
1127 | ||
1128 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
1129 | { | |
1130 | kvm_x86_ops->vcpu_put(vcpu); | |
9327fd11 | 1131 | kvm_put_guest_fpu(vcpu); |
313a3dc7 CO |
1132 | } |
1133 | ||
07716717 | 1134 | static int is_efer_nx(void) |
313a3dc7 | 1135 | { |
e286e86e | 1136 | unsigned long long efer = 0; |
313a3dc7 | 1137 | |
e286e86e | 1138 | rdmsrl_safe(MSR_EFER, &efer); |
07716717 DK |
1139 | return efer & EFER_NX; |
1140 | } | |
1141 | ||
1142 | static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu) | |
1143 | { | |
1144 | int i; | |
1145 | struct kvm_cpuid_entry2 *e, *entry; | |
1146 | ||
313a3dc7 | 1147 | entry = NULL; |
ad312c7c ZX |
1148 | for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { |
1149 | e = &vcpu->arch.cpuid_entries[i]; | |
313a3dc7 CO |
1150 | if (e->function == 0x80000001) { |
1151 | entry = e; | |
1152 | break; | |
1153 | } | |
1154 | } | |
07716717 | 1155 | if (entry && (entry->edx & (1 << 20)) && !is_efer_nx()) { |
313a3dc7 CO |
1156 | entry->edx &= ~(1 << 20); |
1157 | printk(KERN_INFO "kvm: guest NX capability removed\n"); | |
1158 | } | |
1159 | } | |
1160 | ||
07716717 | 1161 | /* when an old userspace process fills a new kernel module */ |
313a3dc7 CO |
1162 | static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu, |
1163 | struct kvm_cpuid *cpuid, | |
1164 | struct kvm_cpuid_entry __user *entries) | |
07716717 DK |
1165 | { |
1166 | int r, i; | |
1167 | struct kvm_cpuid_entry *cpuid_entries; | |
1168 | ||
1169 | r = -E2BIG; | |
1170 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
1171 | goto out; | |
1172 | r = -ENOMEM; | |
1173 | cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry) * cpuid->nent); | |
1174 | if (!cpuid_entries) | |
1175 | goto out; | |
1176 | r = -EFAULT; | |
1177 | if (copy_from_user(cpuid_entries, entries, | |
1178 | cpuid->nent * sizeof(struct kvm_cpuid_entry))) | |
1179 | goto out_free; | |
1180 | for (i = 0; i < cpuid->nent; i++) { | |
ad312c7c ZX |
1181 | vcpu->arch.cpuid_entries[i].function = cpuid_entries[i].function; |
1182 | vcpu->arch.cpuid_entries[i].eax = cpuid_entries[i].eax; | |
1183 | vcpu->arch.cpuid_entries[i].ebx = cpuid_entries[i].ebx; | |
1184 | vcpu->arch.cpuid_entries[i].ecx = cpuid_entries[i].ecx; | |
1185 | vcpu->arch.cpuid_entries[i].edx = cpuid_entries[i].edx; | |
1186 | vcpu->arch.cpuid_entries[i].index = 0; | |
1187 | vcpu->arch.cpuid_entries[i].flags = 0; | |
1188 | vcpu->arch.cpuid_entries[i].padding[0] = 0; | |
1189 | vcpu->arch.cpuid_entries[i].padding[1] = 0; | |
1190 | vcpu->arch.cpuid_entries[i].padding[2] = 0; | |
1191 | } | |
1192 | vcpu->arch.cpuid_nent = cpuid->nent; | |
07716717 DK |
1193 | cpuid_fix_nx_cap(vcpu); |
1194 | r = 0; | |
1195 | ||
1196 | out_free: | |
1197 | vfree(cpuid_entries); | |
1198 | out: | |
1199 | return r; | |
1200 | } | |
1201 | ||
1202 | static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu, | |
19355475 AS |
1203 | struct kvm_cpuid2 *cpuid, |
1204 | struct kvm_cpuid_entry2 __user *entries) | |
313a3dc7 CO |
1205 | { |
1206 | int r; | |
1207 | ||
1208 | r = -E2BIG; | |
1209 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
1210 | goto out; | |
1211 | r = -EFAULT; | |
ad312c7c | 1212 | if (copy_from_user(&vcpu->arch.cpuid_entries, entries, |
07716717 | 1213 | cpuid->nent * sizeof(struct kvm_cpuid_entry2))) |
313a3dc7 | 1214 | goto out; |
ad312c7c | 1215 | vcpu->arch.cpuid_nent = cpuid->nent; |
313a3dc7 CO |
1216 | return 0; |
1217 | ||
1218 | out: | |
1219 | return r; | |
1220 | } | |
1221 | ||
07716717 | 1222 | static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu, |
19355475 AS |
1223 | struct kvm_cpuid2 *cpuid, |
1224 | struct kvm_cpuid_entry2 __user *entries) | |
07716717 DK |
1225 | { |
1226 | int r; | |
1227 | ||
1228 | r = -E2BIG; | |
ad312c7c | 1229 | if (cpuid->nent < vcpu->arch.cpuid_nent) |
07716717 DK |
1230 | goto out; |
1231 | r = -EFAULT; | |
ad312c7c | 1232 | if (copy_to_user(entries, &vcpu->arch.cpuid_entries, |
19355475 | 1233 | vcpu->arch.cpuid_nent * sizeof(struct kvm_cpuid_entry2))) |
07716717 DK |
1234 | goto out; |
1235 | return 0; | |
1236 | ||
1237 | out: | |
ad312c7c | 1238 | cpuid->nent = vcpu->arch.cpuid_nent; |
07716717 DK |
1239 | return r; |
1240 | } | |
1241 | ||
07716717 | 1242 | static void do_cpuid_1_ent(struct kvm_cpuid_entry2 *entry, u32 function, |
19355475 | 1243 | u32 index) |
07716717 DK |
1244 | { |
1245 | entry->function = function; | |
1246 | entry->index = index; | |
1247 | cpuid_count(entry->function, entry->index, | |
19355475 | 1248 | &entry->eax, &entry->ebx, &entry->ecx, &entry->edx); |
07716717 DK |
1249 | entry->flags = 0; |
1250 | } | |
1251 | ||
1252 | static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, | |
1253 | u32 index, int *nent, int maxnent) | |
1254 | { | |
1255 | const u32 kvm_supported_word0_x86_features = bit(X86_FEATURE_FPU) | | |
1256 | bit(X86_FEATURE_VME) | bit(X86_FEATURE_DE) | | |
1257 | bit(X86_FEATURE_PSE) | bit(X86_FEATURE_TSC) | | |
1258 | bit(X86_FEATURE_MSR) | bit(X86_FEATURE_PAE) | | |
1259 | bit(X86_FEATURE_CX8) | bit(X86_FEATURE_APIC) | | |
1260 | bit(X86_FEATURE_SEP) | bit(X86_FEATURE_PGE) | | |
1261 | bit(X86_FEATURE_CMOV) | bit(X86_FEATURE_PSE36) | | |
1262 | bit(X86_FEATURE_CLFLSH) | bit(X86_FEATURE_MMX) | | |
1263 | bit(X86_FEATURE_FXSR) | bit(X86_FEATURE_XMM) | | |
1264 | bit(X86_FEATURE_XMM2) | bit(X86_FEATURE_SELFSNOOP); | |
1265 | const u32 kvm_supported_word1_x86_features = bit(X86_FEATURE_FPU) | | |
1266 | bit(X86_FEATURE_VME) | bit(X86_FEATURE_DE) | | |
1267 | bit(X86_FEATURE_PSE) | bit(X86_FEATURE_TSC) | | |
1268 | bit(X86_FEATURE_MSR) | bit(X86_FEATURE_PAE) | | |
1269 | bit(X86_FEATURE_CX8) | bit(X86_FEATURE_APIC) | | |
1270 | bit(X86_FEATURE_PGE) | | |
1271 | bit(X86_FEATURE_CMOV) | bit(X86_FEATURE_PSE36) | | |
1272 | bit(X86_FEATURE_MMX) | bit(X86_FEATURE_FXSR) | | |
1273 | bit(X86_FEATURE_SYSCALL) | | |
334b8ad7 | 1274 | (is_efer_nx() ? bit(X86_FEATURE_NX) : 0) | |
07716717 DK |
1275 | #ifdef CONFIG_X86_64 |
1276 | bit(X86_FEATURE_LM) | | |
1277 | #endif | |
1b2fd70c | 1278 | bit(X86_FEATURE_FXSR_OPT) | |
07716717 DK |
1279 | bit(X86_FEATURE_MMXEXT) | |
1280 | bit(X86_FEATURE_3DNOWEXT) | | |
1281 | bit(X86_FEATURE_3DNOW); | |
1282 | const u32 kvm_supported_word3_x86_features = | |
1283 | bit(X86_FEATURE_XMM3) | bit(X86_FEATURE_CX16); | |
1284 | const u32 kvm_supported_word6_x86_features = | |
d8017474 AG |
1285 | bit(X86_FEATURE_LAHF_LM) | bit(X86_FEATURE_CMP_LEGACY) | |
1286 | bit(X86_FEATURE_SVM); | |
07716717 | 1287 | |
19355475 | 1288 | /* all calls to cpuid_count() should be made on the same cpu */ |
07716717 DK |
1289 | get_cpu(); |
1290 | do_cpuid_1_ent(entry, function, index); | |
1291 | ++*nent; | |
1292 | ||
1293 | switch (function) { | |
1294 | case 0: | |
1295 | entry->eax = min(entry->eax, (u32)0xb); | |
1296 | break; | |
1297 | case 1: | |
1298 | entry->edx &= kvm_supported_word0_x86_features; | |
1299 | entry->ecx &= kvm_supported_word3_x86_features; | |
1300 | break; | |
1301 | /* function 2 entries are STATEFUL. That is, repeated cpuid commands | |
1302 | * may return different values. This forces us to get_cpu() before | |
1303 | * issuing the first command, and also to emulate this annoying behavior | |
1304 | * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */ | |
1305 | case 2: { | |
1306 | int t, times = entry->eax & 0xff; | |
1307 | ||
1308 | entry->flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; | |
0fdf8e59 | 1309 | entry->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT; |
07716717 DK |
1310 | for (t = 1; t < times && *nent < maxnent; ++t) { |
1311 | do_cpuid_1_ent(&entry[t], function, 0); | |
1312 | entry[t].flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; | |
1313 | ++*nent; | |
1314 | } | |
1315 | break; | |
1316 | } | |
1317 | /* function 4 and 0xb have additional index. */ | |
1318 | case 4: { | |
14af3f3c | 1319 | int i, cache_type; |
07716717 DK |
1320 | |
1321 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
1322 | /* read more entries until cache_type is zero */ | |
14af3f3c HH |
1323 | for (i = 1; *nent < maxnent; ++i) { |
1324 | cache_type = entry[i - 1].eax & 0x1f; | |
07716717 DK |
1325 | if (!cache_type) |
1326 | break; | |
14af3f3c HH |
1327 | do_cpuid_1_ent(&entry[i], function, i); |
1328 | entry[i].flags |= | |
07716717 DK |
1329 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
1330 | ++*nent; | |
1331 | } | |
1332 | break; | |
1333 | } | |
1334 | case 0xb: { | |
14af3f3c | 1335 | int i, level_type; |
07716717 DK |
1336 | |
1337 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
1338 | /* read more entries until level_type is zero */ | |
14af3f3c | 1339 | for (i = 1; *nent < maxnent; ++i) { |
0853d2c1 | 1340 | level_type = entry[i - 1].ecx & 0xff00; |
07716717 DK |
1341 | if (!level_type) |
1342 | break; | |
14af3f3c HH |
1343 | do_cpuid_1_ent(&entry[i], function, i); |
1344 | entry[i].flags |= | |
07716717 DK |
1345 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
1346 | ++*nent; | |
1347 | } | |
1348 | break; | |
1349 | } | |
1350 | case 0x80000000: | |
1351 | entry->eax = min(entry->eax, 0x8000001a); | |
1352 | break; | |
1353 | case 0x80000001: | |
1354 | entry->edx &= kvm_supported_word1_x86_features; | |
1355 | entry->ecx &= kvm_supported_word6_x86_features; | |
1356 | break; | |
1357 | } | |
1358 | put_cpu(); | |
1359 | } | |
1360 | ||
674eea0f | 1361 | static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, |
19355475 | 1362 | struct kvm_cpuid_entry2 __user *entries) |
07716717 DK |
1363 | { |
1364 | struct kvm_cpuid_entry2 *cpuid_entries; | |
1365 | int limit, nent = 0, r = -E2BIG; | |
1366 | u32 func; | |
1367 | ||
1368 | if (cpuid->nent < 1) | |
1369 | goto out; | |
1370 | r = -ENOMEM; | |
1371 | cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry2) * cpuid->nent); | |
1372 | if (!cpuid_entries) | |
1373 | goto out; | |
1374 | ||
1375 | do_cpuid_ent(&cpuid_entries[0], 0, 0, &nent, cpuid->nent); | |
1376 | limit = cpuid_entries[0].eax; | |
1377 | for (func = 1; func <= limit && nent < cpuid->nent; ++func) | |
1378 | do_cpuid_ent(&cpuid_entries[nent], func, 0, | |
19355475 | 1379 | &nent, cpuid->nent); |
07716717 DK |
1380 | r = -E2BIG; |
1381 | if (nent >= cpuid->nent) | |
1382 | goto out_free; | |
1383 | ||
1384 | do_cpuid_ent(&cpuid_entries[nent], 0x80000000, 0, &nent, cpuid->nent); | |
1385 | limit = cpuid_entries[nent - 1].eax; | |
1386 | for (func = 0x80000001; func <= limit && nent < cpuid->nent; ++func) | |
1387 | do_cpuid_ent(&cpuid_entries[nent], func, 0, | |
19355475 | 1388 | &nent, cpuid->nent); |
07716717 DK |
1389 | r = -EFAULT; |
1390 | if (copy_to_user(entries, cpuid_entries, | |
19355475 | 1391 | nent * sizeof(struct kvm_cpuid_entry2))) |
07716717 DK |
1392 | goto out_free; |
1393 | cpuid->nent = nent; | |
1394 | r = 0; | |
1395 | ||
1396 | out_free: | |
1397 | vfree(cpuid_entries); | |
1398 | out: | |
1399 | return r; | |
1400 | } | |
1401 | ||
313a3dc7 CO |
1402 | static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu, |
1403 | struct kvm_lapic_state *s) | |
1404 | { | |
1405 | vcpu_load(vcpu); | |
ad312c7c | 1406 | memcpy(s->regs, vcpu->arch.apic->regs, sizeof *s); |
313a3dc7 CO |
1407 | vcpu_put(vcpu); |
1408 | ||
1409 | return 0; | |
1410 | } | |
1411 | ||
1412 | static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu, | |
1413 | struct kvm_lapic_state *s) | |
1414 | { | |
1415 | vcpu_load(vcpu); | |
ad312c7c | 1416 | memcpy(vcpu->arch.apic->regs, s->regs, sizeof *s); |
313a3dc7 CO |
1417 | kvm_apic_post_state_restore(vcpu); |
1418 | vcpu_put(vcpu); | |
1419 | ||
1420 | return 0; | |
1421 | } | |
1422 | ||
f77bc6a4 ZX |
1423 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
1424 | struct kvm_interrupt *irq) | |
1425 | { | |
1426 | if (irq->irq < 0 || irq->irq >= 256) | |
1427 | return -EINVAL; | |
1428 | if (irqchip_in_kernel(vcpu->kvm)) | |
1429 | return -ENXIO; | |
1430 | vcpu_load(vcpu); | |
1431 | ||
ad312c7c ZX |
1432 | set_bit(irq->irq, vcpu->arch.irq_pending); |
1433 | set_bit(irq->irq / BITS_PER_LONG, &vcpu->arch.irq_summary); | |
f77bc6a4 ZX |
1434 | |
1435 | vcpu_put(vcpu); | |
1436 | ||
1437 | return 0; | |
1438 | } | |
1439 | ||
c4abb7c9 JK |
1440 | static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu *vcpu) |
1441 | { | |
1442 | vcpu_load(vcpu); | |
1443 | kvm_inject_nmi(vcpu); | |
1444 | vcpu_put(vcpu); | |
1445 | ||
1446 | return 0; | |
1447 | } | |
1448 | ||
b209749f AK |
1449 | static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu, |
1450 | struct kvm_tpr_access_ctl *tac) | |
1451 | { | |
1452 | if (tac->flags) | |
1453 | return -EINVAL; | |
1454 | vcpu->arch.tpr_access_reporting = !!tac->enabled; | |
1455 | return 0; | |
1456 | } | |
1457 | ||
313a3dc7 CO |
1458 | long kvm_arch_vcpu_ioctl(struct file *filp, |
1459 | unsigned int ioctl, unsigned long arg) | |
1460 | { | |
1461 | struct kvm_vcpu *vcpu = filp->private_data; | |
1462 | void __user *argp = (void __user *)arg; | |
1463 | int r; | |
b772ff36 | 1464 | struct kvm_lapic_state *lapic = NULL; |
313a3dc7 CO |
1465 | |
1466 | switch (ioctl) { | |
1467 | case KVM_GET_LAPIC: { | |
b772ff36 | 1468 | lapic = kzalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
313a3dc7 | 1469 | |
b772ff36 DH |
1470 | r = -ENOMEM; |
1471 | if (!lapic) | |
1472 | goto out; | |
1473 | r = kvm_vcpu_ioctl_get_lapic(vcpu, lapic); | |
313a3dc7 CO |
1474 | if (r) |
1475 | goto out; | |
1476 | r = -EFAULT; | |
b772ff36 | 1477 | if (copy_to_user(argp, lapic, sizeof(struct kvm_lapic_state))) |
313a3dc7 CO |
1478 | goto out; |
1479 | r = 0; | |
1480 | break; | |
1481 | } | |
1482 | case KVM_SET_LAPIC: { | |
b772ff36 DH |
1483 | lapic = kmalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
1484 | r = -ENOMEM; | |
1485 | if (!lapic) | |
1486 | goto out; | |
313a3dc7 | 1487 | r = -EFAULT; |
b772ff36 | 1488 | if (copy_from_user(lapic, argp, sizeof(struct kvm_lapic_state))) |
313a3dc7 | 1489 | goto out; |
b772ff36 | 1490 | r = kvm_vcpu_ioctl_set_lapic(vcpu, lapic); |
313a3dc7 CO |
1491 | if (r) |
1492 | goto out; | |
1493 | r = 0; | |
1494 | break; | |
1495 | } | |
f77bc6a4 ZX |
1496 | case KVM_INTERRUPT: { |
1497 | struct kvm_interrupt irq; | |
1498 | ||
1499 | r = -EFAULT; | |
1500 | if (copy_from_user(&irq, argp, sizeof irq)) | |
1501 | goto out; | |
1502 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); | |
1503 | if (r) | |
1504 | goto out; | |
1505 | r = 0; | |
1506 | break; | |
1507 | } | |
c4abb7c9 JK |
1508 | case KVM_NMI: { |
1509 | r = kvm_vcpu_ioctl_nmi(vcpu); | |
1510 | if (r) | |
1511 | goto out; | |
1512 | r = 0; | |
1513 | break; | |
1514 | } | |
313a3dc7 CO |
1515 | case KVM_SET_CPUID: { |
1516 | struct kvm_cpuid __user *cpuid_arg = argp; | |
1517 | struct kvm_cpuid cpuid; | |
1518 | ||
1519 | r = -EFAULT; | |
1520 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
1521 | goto out; | |
1522 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); | |
1523 | if (r) | |
1524 | goto out; | |
1525 | break; | |
1526 | } | |
07716717 DK |
1527 | case KVM_SET_CPUID2: { |
1528 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
1529 | struct kvm_cpuid2 cpuid; | |
1530 | ||
1531 | r = -EFAULT; | |
1532 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
1533 | goto out; | |
1534 | r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid, | |
19355475 | 1535 | cpuid_arg->entries); |
07716717 DK |
1536 | if (r) |
1537 | goto out; | |
1538 | break; | |
1539 | } | |
1540 | case KVM_GET_CPUID2: { | |
1541 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
1542 | struct kvm_cpuid2 cpuid; | |
1543 | ||
1544 | r = -EFAULT; | |
1545 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
1546 | goto out; | |
1547 | r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid, | |
19355475 | 1548 | cpuid_arg->entries); |
07716717 DK |
1549 | if (r) |
1550 | goto out; | |
1551 | r = -EFAULT; | |
1552 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
1553 | goto out; | |
1554 | r = 0; | |
1555 | break; | |
1556 | } | |
313a3dc7 CO |
1557 | case KVM_GET_MSRS: |
1558 | r = msr_io(vcpu, argp, kvm_get_msr, 1); | |
1559 | break; | |
1560 | case KVM_SET_MSRS: | |
1561 | r = msr_io(vcpu, argp, do_set_msr, 0); | |
1562 | break; | |
b209749f AK |
1563 | case KVM_TPR_ACCESS_REPORTING: { |
1564 | struct kvm_tpr_access_ctl tac; | |
1565 | ||
1566 | r = -EFAULT; | |
1567 | if (copy_from_user(&tac, argp, sizeof tac)) | |
1568 | goto out; | |
1569 | r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac); | |
1570 | if (r) | |
1571 | goto out; | |
1572 | r = -EFAULT; | |
1573 | if (copy_to_user(argp, &tac, sizeof tac)) | |
1574 | goto out; | |
1575 | r = 0; | |
1576 | break; | |
1577 | }; | |
b93463aa AK |
1578 | case KVM_SET_VAPIC_ADDR: { |
1579 | struct kvm_vapic_addr va; | |
1580 | ||
1581 | r = -EINVAL; | |
1582 | if (!irqchip_in_kernel(vcpu->kvm)) | |
1583 | goto out; | |
1584 | r = -EFAULT; | |
1585 | if (copy_from_user(&va, argp, sizeof va)) | |
1586 | goto out; | |
1587 | r = 0; | |
1588 | kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr); | |
1589 | break; | |
1590 | } | |
313a3dc7 CO |
1591 | default: |
1592 | r = -EINVAL; | |
1593 | } | |
1594 | out: | |
b772ff36 DH |
1595 | if (lapic) |
1596 | kfree(lapic); | |
313a3dc7 CO |
1597 | return r; |
1598 | } | |
1599 | ||
1fe779f8 CO |
1600 | static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr) |
1601 | { | |
1602 | int ret; | |
1603 | ||
1604 | if (addr > (unsigned int)(-3 * PAGE_SIZE)) | |
1605 | return -1; | |
1606 | ret = kvm_x86_ops->set_tss_addr(kvm, addr); | |
1607 | return ret; | |
1608 | } | |
1609 | ||
1610 | static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm, | |
1611 | u32 kvm_nr_mmu_pages) | |
1612 | { | |
1613 | if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES) | |
1614 | return -EINVAL; | |
1615 | ||
72dc67a6 | 1616 | down_write(&kvm->slots_lock); |
1fe779f8 CO |
1617 | |
1618 | kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages); | |
f05e70ac | 1619 | kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages; |
1fe779f8 | 1620 | |
72dc67a6 | 1621 | up_write(&kvm->slots_lock); |
1fe779f8 CO |
1622 | return 0; |
1623 | } | |
1624 | ||
1625 | static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm) | |
1626 | { | |
f05e70ac | 1627 | return kvm->arch.n_alloc_mmu_pages; |
1fe779f8 CO |
1628 | } |
1629 | ||
e9f85cde ZX |
1630 | gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) |
1631 | { | |
1632 | int i; | |
1633 | struct kvm_mem_alias *alias; | |
1634 | ||
d69fb81f ZX |
1635 | for (i = 0; i < kvm->arch.naliases; ++i) { |
1636 | alias = &kvm->arch.aliases[i]; | |
e9f85cde ZX |
1637 | if (gfn >= alias->base_gfn |
1638 | && gfn < alias->base_gfn + alias->npages) | |
1639 | return alias->target_gfn + gfn - alias->base_gfn; | |
1640 | } | |
1641 | return gfn; | |
1642 | } | |
1643 | ||
1fe779f8 CO |
1644 | /* |
1645 | * Set a new alias region. Aliases map a portion of physical memory into | |
1646 | * another portion. This is useful for memory windows, for example the PC | |
1647 | * VGA region. | |
1648 | */ | |
1649 | static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm, | |
1650 | struct kvm_memory_alias *alias) | |
1651 | { | |
1652 | int r, n; | |
1653 | struct kvm_mem_alias *p; | |
1654 | ||
1655 | r = -EINVAL; | |
1656 | /* General sanity checks */ | |
1657 | if (alias->memory_size & (PAGE_SIZE - 1)) | |
1658 | goto out; | |
1659 | if (alias->guest_phys_addr & (PAGE_SIZE - 1)) | |
1660 | goto out; | |
1661 | if (alias->slot >= KVM_ALIAS_SLOTS) | |
1662 | goto out; | |
1663 | if (alias->guest_phys_addr + alias->memory_size | |
1664 | < alias->guest_phys_addr) | |
1665 | goto out; | |
1666 | if (alias->target_phys_addr + alias->memory_size | |
1667 | < alias->target_phys_addr) | |
1668 | goto out; | |
1669 | ||
72dc67a6 | 1670 | down_write(&kvm->slots_lock); |
a1708ce8 | 1671 | spin_lock(&kvm->mmu_lock); |
1fe779f8 | 1672 | |
d69fb81f | 1673 | p = &kvm->arch.aliases[alias->slot]; |
1fe779f8 CO |
1674 | p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT; |
1675 | p->npages = alias->memory_size >> PAGE_SHIFT; | |
1676 | p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT; | |
1677 | ||
1678 | for (n = KVM_ALIAS_SLOTS; n > 0; --n) | |
d69fb81f | 1679 | if (kvm->arch.aliases[n - 1].npages) |
1fe779f8 | 1680 | break; |
d69fb81f | 1681 | kvm->arch.naliases = n; |
1fe779f8 | 1682 | |
a1708ce8 | 1683 | spin_unlock(&kvm->mmu_lock); |
1fe779f8 CO |
1684 | kvm_mmu_zap_all(kvm); |
1685 | ||
72dc67a6 | 1686 | up_write(&kvm->slots_lock); |
1fe779f8 CO |
1687 | |
1688 | return 0; | |
1689 | ||
1690 | out: | |
1691 | return r; | |
1692 | } | |
1693 | ||
1694 | static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
1695 | { | |
1696 | int r; | |
1697 | ||
1698 | r = 0; | |
1699 | switch (chip->chip_id) { | |
1700 | case KVM_IRQCHIP_PIC_MASTER: | |
1701 | memcpy(&chip->chip.pic, | |
1702 | &pic_irqchip(kvm)->pics[0], | |
1703 | sizeof(struct kvm_pic_state)); | |
1704 | break; | |
1705 | case KVM_IRQCHIP_PIC_SLAVE: | |
1706 | memcpy(&chip->chip.pic, | |
1707 | &pic_irqchip(kvm)->pics[1], | |
1708 | sizeof(struct kvm_pic_state)); | |
1709 | break; | |
1710 | case KVM_IRQCHIP_IOAPIC: | |
1711 | memcpy(&chip->chip.ioapic, | |
1712 | ioapic_irqchip(kvm), | |
1713 | sizeof(struct kvm_ioapic_state)); | |
1714 | break; | |
1715 | default: | |
1716 | r = -EINVAL; | |
1717 | break; | |
1718 | } | |
1719 | return r; | |
1720 | } | |
1721 | ||
1722 | static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
1723 | { | |
1724 | int r; | |
1725 | ||
1726 | r = 0; | |
1727 | switch (chip->chip_id) { | |
1728 | case KVM_IRQCHIP_PIC_MASTER: | |
1729 | memcpy(&pic_irqchip(kvm)->pics[0], | |
1730 | &chip->chip.pic, | |
1731 | sizeof(struct kvm_pic_state)); | |
1732 | break; | |
1733 | case KVM_IRQCHIP_PIC_SLAVE: | |
1734 | memcpy(&pic_irqchip(kvm)->pics[1], | |
1735 | &chip->chip.pic, | |
1736 | sizeof(struct kvm_pic_state)); | |
1737 | break; | |
1738 | case KVM_IRQCHIP_IOAPIC: | |
1739 | memcpy(ioapic_irqchip(kvm), | |
1740 | &chip->chip.ioapic, | |
1741 | sizeof(struct kvm_ioapic_state)); | |
1742 | break; | |
1743 | default: | |
1744 | r = -EINVAL; | |
1745 | break; | |
1746 | } | |
1747 | kvm_pic_update_irq(pic_irqchip(kvm)); | |
1748 | return r; | |
1749 | } | |
1750 | ||
e0f63cb9 SY |
1751 | static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps) |
1752 | { | |
1753 | int r = 0; | |
1754 | ||
1755 | memcpy(ps, &kvm->arch.vpit->pit_state, sizeof(struct kvm_pit_state)); | |
1756 | return r; | |
1757 | } | |
1758 | ||
1759 | static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps) | |
1760 | { | |
1761 | int r = 0; | |
1762 | ||
1763 | memcpy(&kvm->arch.vpit->pit_state, ps, sizeof(struct kvm_pit_state)); | |
1764 | kvm_pit_load_count(kvm, 0, ps->channels[0].count); | |
1765 | return r; | |
1766 | } | |
1767 | ||
52d939a0 MT |
1768 | static int kvm_vm_ioctl_reinject(struct kvm *kvm, |
1769 | struct kvm_reinject_control *control) | |
1770 | { | |
1771 | if (!kvm->arch.vpit) | |
1772 | return -ENXIO; | |
1773 | kvm->arch.vpit->pit_state.pit_timer.reinject = control->pit_reinject; | |
1774 | return 0; | |
1775 | } | |
1776 | ||
5bb064dc ZX |
1777 | /* |
1778 | * Get (and clear) the dirty memory log for a memory slot. | |
1779 | */ | |
1780 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
1781 | struct kvm_dirty_log *log) | |
1782 | { | |
1783 | int r; | |
1784 | int n; | |
1785 | struct kvm_memory_slot *memslot; | |
1786 | int is_dirty = 0; | |
1787 | ||
72dc67a6 | 1788 | down_write(&kvm->slots_lock); |
5bb064dc ZX |
1789 | |
1790 | r = kvm_get_dirty_log(kvm, log, &is_dirty); | |
1791 | if (r) | |
1792 | goto out; | |
1793 | ||
1794 | /* If nothing is dirty, don't bother messing with page tables. */ | |
1795 | if (is_dirty) { | |
1796 | kvm_mmu_slot_remove_write_access(kvm, log->slot); | |
1797 | kvm_flush_remote_tlbs(kvm); | |
1798 | memslot = &kvm->memslots[log->slot]; | |
1799 | n = ALIGN(memslot->npages, BITS_PER_LONG) / 8; | |
1800 | memset(memslot->dirty_bitmap, 0, n); | |
1801 | } | |
1802 | r = 0; | |
1803 | out: | |
72dc67a6 | 1804 | up_write(&kvm->slots_lock); |
5bb064dc ZX |
1805 | return r; |
1806 | } | |
1807 | ||
1fe779f8 CO |
1808 | long kvm_arch_vm_ioctl(struct file *filp, |
1809 | unsigned int ioctl, unsigned long arg) | |
1810 | { | |
1811 | struct kvm *kvm = filp->private_data; | |
1812 | void __user *argp = (void __user *)arg; | |
1813 | int r = -EINVAL; | |
f0d66275 DH |
1814 | /* |
1815 | * This union makes it completely explicit to gcc-3.x | |
1816 | * that these two variables' stack usage should be | |
1817 | * combined, not added together. | |
1818 | */ | |
1819 | union { | |
1820 | struct kvm_pit_state ps; | |
1821 | struct kvm_memory_alias alias; | |
1822 | } u; | |
1fe779f8 CO |
1823 | |
1824 | switch (ioctl) { | |
1825 | case KVM_SET_TSS_ADDR: | |
1826 | r = kvm_vm_ioctl_set_tss_addr(kvm, arg); | |
1827 | if (r < 0) | |
1828 | goto out; | |
1829 | break; | |
1830 | case KVM_SET_MEMORY_REGION: { | |
1831 | struct kvm_memory_region kvm_mem; | |
1832 | struct kvm_userspace_memory_region kvm_userspace_mem; | |
1833 | ||
1834 | r = -EFAULT; | |
1835 | if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem)) | |
1836 | goto out; | |
1837 | kvm_userspace_mem.slot = kvm_mem.slot; | |
1838 | kvm_userspace_mem.flags = kvm_mem.flags; | |
1839 | kvm_userspace_mem.guest_phys_addr = kvm_mem.guest_phys_addr; | |
1840 | kvm_userspace_mem.memory_size = kvm_mem.memory_size; | |
1841 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 0); | |
1842 | if (r) | |
1843 | goto out; | |
1844 | break; | |
1845 | } | |
1846 | case KVM_SET_NR_MMU_PAGES: | |
1847 | r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg); | |
1848 | if (r) | |
1849 | goto out; | |
1850 | break; | |
1851 | case KVM_GET_NR_MMU_PAGES: | |
1852 | r = kvm_vm_ioctl_get_nr_mmu_pages(kvm); | |
1853 | break; | |
f0d66275 | 1854 | case KVM_SET_MEMORY_ALIAS: |
1fe779f8 | 1855 | r = -EFAULT; |
f0d66275 | 1856 | if (copy_from_user(&u.alias, argp, sizeof(struct kvm_memory_alias))) |
1fe779f8 | 1857 | goto out; |
f0d66275 | 1858 | r = kvm_vm_ioctl_set_memory_alias(kvm, &u.alias); |
1fe779f8 CO |
1859 | if (r) |
1860 | goto out; | |
1861 | break; | |
1fe779f8 CO |
1862 | case KVM_CREATE_IRQCHIP: |
1863 | r = -ENOMEM; | |
d7deeeb0 ZX |
1864 | kvm->arch.vpic = kvm_create_pic(kvm); |
1865 | if (kvm->arch.vpic) { | |
1fe779f8 CO |
1866 | r = kvm_ioapic_init(kvm); |
1867 | if (r) { | |
d7deeeb0 ZX |
1868 | kfree(kvm->arch.vpic); |
1869 | kvm->arch.vpic = NULL; | |
1fe779f8 CO |
1870 | goto out; |
1871 | } | |
1872 | } else | |
1873 | goto out; | |
399ec807 AK |
1874 | r = kvm_setup_default_irq_routing(kvm); |
1875 | if (r) { | |
1876 | kfree(kvm->arch.vpic); | |
1877 | kfree(kvm->arch.vioapic); | |
1878 | goto out; | |
1879 | } | |
1fe779f8 | 1880 | break; |
7837699f | 1881 | case KVM_CREATE_PIT: |
269e05e4 AK |
1882 | mutex_lock(&kvm->lock); |
1883 | r = -EEXIST; | |
1884 | if (kvm->arch.vpit) | |
1885 | goto create_pit_unlock; | |
7837699f SY |
1886 | r = -ENOMEM; |
1887 | kvm->arch.vpit = kvm_create_pit(kvm); | |
1888 | if (kvm->arch.vpit) | |
1889 | r = 0; | |
269e05e4 AK |
1890 | create_pit_unlock: |
1891 | mutex_unlock(&kvm->lock); | |
7837699f | 1892 | break; |
4925663a | 1893 | case KVM_IRQ_LINE_STATUS: |
1fe779f8 CO |
1894 | case KVM_IRQ_LINE: { |
1895 | struct kvm_irq_level irq_event; | |
1896 | ||
1897 | r = -EFAULT; | |
1898 | if (copy_from_user(&irq_event, argp, sizeof irq_event)) | |
1899 | goto out; | |
1900 | if (irqchip_in_kernel(kvm)) { | |
4925663a | 1901 | __s32 status; |
1fe779f8 | 1902 | mutex_lock(&kvm->lock); |
4925663a GN |
1903 | status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, |
1904 | irq_event.irq, irq_event.level); | |
1fe779f8 | 1905 | mutex_unlock(&kvm->lock); |
4925663a GN |
1906 | if (ioctl == KVM_IRQ_LINE_STATUS) { |
1907 | irq_event.status = status; | |
1908 | if (copy_to_user(argp, &irq_event, | |
1909 | sizeof irq_event)) | |
1910 | goto out; | |
1911 | } | |
1fe779f8 CO |
1912 | r = 0; |
1913 | } | |
1914 | break; | |
1915 | } | |
1916 | case KVM_GET_IRQCHIP: { | |
1917 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
f0d66275 | 1918 | struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); |
1fe779f8 | 1919 | |
f0d66275 DH |
1920 | r = -ENOMEM; |
1921 | if (!chip) | |
1fe779f8 | 1922 | goto out; |
f0d66275 DH |
1923 | r = -EFAULT; |
1924 | if (copy_from_user(chip, argp, sizeof *chip)) | |
1925 | goto get_irqchip_out; | |
1fe779f8 CO |
1926 | r = -ENXIO; |
1927 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
1928 | goto get_irqchip_out; |
1929 | r = kvm_vm_ioctl_get_irqchip(kvm, chip); | |
1fe779f8 | 1930 | if (r) |
f0d66275 | 1931 | goto get_irqchip_out; |
1fe779f8 | 1932 | r = -EFAULT; |
f0d66275 DH |
1933 | if (copy_to_user(argp, chip, sizeof *chip)) |
1934 | goto get_irqchip_out; | |
1fe779f8 | 1935 | r = 0; |
f0d66275 DH |
1936 | get_irqchip_out: |
1937 | kfree(chip); | |
1938 | if (r) | |
1939 | goto out; | |
1fe779f8 CO |
1940 | break; |
1941 | } | |
1942 | case KVM_SET_IRQCHIP: { | |
1943 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
f0d66275 | 1944 | struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); |
1fe779f8 | 1945 | |
f0d66275 DH |
1946 | r = -ENOMEM; |
1947 | if (!chip) | |
1fe779f8 | 1948 | goto out; |
f0d66275 DH |
1949 | r = -EFAULT; |
1950 | if (copy_from_user(chip, argp, sizeof *chip)) | |
1951 | goto set_irqchip_out; | |
1fe779f8 CO |
1952 | r = -ENXIO; |
1953 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
1954 | goto set_irqchip_out; |
1955 | r = kvm_vm_ioctl_set_irqchip(kvm, chip); | |
1fe779f8 | 1956 | if (r) |
f0d66275 | 1957 | goto set_irqchip_out; |
1fe779f8 | 1958 | r = 0; |
f0d66275 DH |
1959 | set_irqchip_out: |
1960 | kfree(chip); | |
1961 | if (r) | |
1962 | goto out; | |
1fe779f8 CO |
1963 | break; |
1964 | } | |
e0f63cb9 | 1965 | case KVM_GET_PIT: { |
e0f63cb9 | 1966 | r = -EFAULT; |
f0d66275 | 1967 | if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
1968 | goto out; |
1969 | r = -ENXIO; | |
1970 | if (!kvm->arch.vpit) | |
1971 | goto out; | |
f0d66275 | 1972 | r = kvm_vm_ioctl_get_pit(kvm, &u.ps); |
e0f63cb9 SY |
1973 | if (r) |
1974 | goto out; | |
1975 | r = -EFAULT; | |
f0d66275 | 1976 | if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
1977 | goto out; |
1978 | r = 0; | |
1979 | break; | |
1980 | } | |
1981 | case KVM_SET_PIT: { | |
e0f63cb9 | 1982 | r = -EFAULT; |
f0d66275 | 1983 | if (copy_from_user(&u.ps, argp, sizeof u.ps)) |
e0f63cb9 SY |
1984 | goto out; |
1985 | r = -ENXIO; | |
1986 | if (!kvm->arch.vpit) | |
1987 | goto out; | |
f0d66275 | 1988 | r = kvm_vm_ioctl_set_pit(kvm, &u.ps); |
e0f63cb9 SY |
1989 | if (r) |
1990 | goto out; | |
1991 | r = 0; | |
1992 | break; | |
1993 | } | |
52d939a0 MT |
1994 | case KVM_REINJECT_CONTROL: { |
1995 | struct kvm_reinject_control control; | |
1996 | r = -EFAULT; | |
1997 | if (copy_from_user(&control, argp, sizeof(control))) | |
1998 | goto out; | |
1999 | r = kvm_vm_ioctl_reinject(kvm, &control); | |
2000 | if (r) | |
2001 | goto out; | |
2002 | r = 0; | |
2003 | break; | |
2004 | } | |
1fe779f8 CO |
2005 | default: |
2006 | ; | |
2007 | } | |
2008 | out: | |
2009 | return r; | |
2010 | } | |
2011 | ||
a16b043c | 2012 | static void kvm_init_msr_list(void) |
043405e1 CO |
2013 | { |
2014 | u32 dummy[2]; | |
2015 | unsigned i, j; | |
2016 | ||
2017 | for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) { | |
2018 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) | |
2019 | continue; | |
2020 | if (j < i) | |
2021 | msrs_to_save[j] = msrs_to_save[i]; | |
2022 | j++; | |
2023 | } | |
2024 | num_msrs_to_save = j; | |
2025 | } | |
2026 | ||
bbd9b64e CO |
2027 | /* |
2028 | * Only apic need an MMIO device hook, so shortcut now.. | |
2029 | */ | |
2030 | static struct kvm_io_device *vcpu_find_pervcpu_dev(struct kvm_vcpu *vcpu, | |
92760499 LV |
2031 | gpa_t addr, int len, |
2032 | int is_write) | |
bbd9b64e CO |
2033 | { |
2034 | struct kvm_io_device *dev; | |
2035 | ||
ad312c7c ZX |
2036 | if (vcpu->arch.apic) { |
2037 | dev = &vcpu->arch.apic->dev; | |
92760499 | 2038 | if (dev->in_range(dev, addr, len, is_write)) |
bbd9b64e CO |
2039 | return dev; |
2040 | } | |
2041 | return NULL; | |
2042 | } | |
2043 | ||
2044 | ||
2045 | static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu, | |
92760499 LV |
2046 | gpa_t addr, int len, |
2047 | int is_write) | |
bbd9b64e CO |
2048 | { |
2049 | struct kvm_io_device *dev; | |
2050 | ||
92760499 | 2051 | dev = vcpu_find_pervcpu_dev(vcpu, addr, len, is_write); |
bbd9b64e | 2052 | if (dev == NULL) |
92760499 LV |
2053 | dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr, len, |
2054 | is_write); | |
bbd9b64e CO |
2055 | return dev; |
2056 | } | |
2057 | ||
cded19f3 HE |
2058 | static int kvm_read_guest_virt(gva_t addr, void *val, unsigned int bytes, |
2059 | struct kvm_vcpu *vcpu) | |
bbd9b64e CO |
2060 | { |
2061 | void *data = val; | |
10589a46 | 2062 | int r = X86EMUL_CONTINUE; |
bbd9b64e CO |
2063 | |
2064 | while (bytes) { | |
ad312c7c | 2065 | gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
bbd9b64e | 2066 | unsigned offset = addr & (PAGE_SIZE-1); |
77c2002e | 2067 | unsigned toread = min(bytes, (unsigned)PAGE_SIZE - offset); |
bbd9b64e CO |
2068 | int ret; |
2069 | ||
10589a46 MT |
2070 | if (gpa == UNMAPPED_GVA) { |
2071 | r = X86EMUL_PROPAGATE_FAULT; | |
2072 | goto out; | |
2073 | } | |
77c2002e | 2074 | ret = kvm_read_guest(vcpu->kvm, gpa, data, toread); |
10589a46 MT |
2075 | if (ret < 0) { |
2076 | r = X86EMUL_UNHANDLEABLE; | |
2077 | goto out; | |
2078 | } | |
bbd9b64e | 2079 | |
77c2002e IE |
2080 | bytes -= toread; |
2081 | data += toread; | |
2082 | addr += toread; | |
bbd9b64e | 2083 | } |
10589a46 | 2084 | out: |
10589a46 | 2085 | return r; |
bbd9b64e | 2086 | } |
77c2002e | 2087 | |
cded19f3 HE |
2088 | static int kvm_write_guest_virt(gva_t addr, void *val, unsigned int bytes, |
2089 | struct kvm_vcpu *vcpu) | |
77c2002e IE |
2090 | { |
2091 | void *data = val; | |
2092 | int r = X86EMUL_CONTINUE; | |
2093 | ||
2094 | while (bytes) { | |
2095 | gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); | |
2096 | unsigned offset = addr & (PAGE_SIZE-1); | |
2097 | unsigned towrite = min(bytes, (unsigned)PAGE_SIZE - offset); | |
2098 | int ret; | |
2099 | ||
2100 | if (gpa == UNMAPPED_GVA) { | |
2101 | r = X86EMUL_PROPAGATE_FAULT; | |
2102 | goto out; | |
2103 | } | |
2104 | ret = kvm_write_guest(vcpu->kvm, gpa, data, towrite); | |
2105 | if (ret < 0) { | |
2106 | r = X86EMUL_UNHANDLEABLE; | |
2107 | goto out; | |
2108 | } | |
2109 | ||
2110 | bytes -= towrite; | |
2111 | data += towrite; | |
2112 | addr += towrite; | |
2113 | } | |
2114 | out: | |
2115 | return r; | |
2116 | } | |
2117 | ||
bbd9b64e | 2118 | |
bbd9b64e CO |
2119 | static int emulator_read_emulated(unsigned long addr, |
2120 | void *val, | |
2121 | unsigned int bytes, | |
2122 | struct kvm_vcpu *vcpu) | |
2123 | { | |
2124 | struct kvm_io_device *mmio_dev; | |
2125 | gpa_t gpa; | |
2126 | ||
2127 | if (vcpu->mmio_read_completed) { | |
2128 | memcpy(val, vcpu->mmio_data, bytes); | |
2129 | vcpu->mmio_read_completed = 0; | |
2130 | return X86EMUL_CONTINUE; | |
2131 | } | |
2132 | ||
ad312c7c | 2133 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
bbd9b64e CO |
2134 | |
2135 | /* For APIC access vmexit */ | |
2136 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
2137 | goto mmio; | |
2138 | ||
77c2002e IE |
2139 | if (kvm_read_guest_virt(addr, val, bytes, vcpu) |
2140 | == X86EMUL_CONTINUE) | |
bbd9b64e CO |
2141 | return X86EMUL_CONTINUE; |
2142 | if (gpa == UNMAPPED_GVA) | |
2143 | return X86EMUL_PROPAGATE_FAULT; | |
2144 | ||
2145 | mmio: | |
2146 | /* | |
2147 | * Is this MMIO handled locally? | |
2148 | */ | |
10589a46 | 2149 | mutex_lock(&vcpu->kvm->lock); |
92760499 | 2150 | mmio_dev = vcpu_find_mmio_dev(vcpu, gpa, bytes, 0); |
bbd9b64e CO |
2151 | if (mmio_dev) { |
2152 | kvm_iodevice_read(mmio_dev, gpa, bytes, val); | |
10589a46 | 2153 | mutex_unlock(&vcpu->kvm->lock); |
bbd9b64e CO |
2154 | return X86EMUL_CONTINUE; |
2155 | } | |
10589a46 | 2156 | mutex_unlock(&vcpu->kvm->lock); |
bbd9b64e CO |
2157 | |
2158 | vcpu->mmio_needed = 1; | |
2159 | vcpu->mmio_phys_addr = gpa; | |
2160 | vcpu->mmio_size = bytes; | |
2161 | vcpu->mmio_is_write = 0; | |
2162 | ||
2163 | return X86EMUL_UNHANDLEABLE; | |
2164 | } | |
2165 | ||
3200f405 | 2166 | int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
9f811285 | 2167 | const void *val, int bytes) |
bbd9b64e CO |
2168 | { |
2169 | int ret; | |
2170 | ||
2171 | ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes); | |
9f811285 | 2172 | if (ret < 0) |
bbd9b64e | 2173 | return 0; |
ad218f85 | 2174 | kvm_mmu_pte_write(vcpu, gpa, val, bytes, 1); |
bbd9b64e CO |
2175 | return 1; |
2176 | } | |
2177 | ||
2178 | static int emulator_write_emulated_onepage(unsigned long addr, | |
2179 | const void *val, | |
2180 | unsigned int bytes, | |
2181 | struct kvm_vcpu *vcpu) | |
2182 | { | |
2183 | struct kvm_io_device *mmio_dev; | |
10589a46 MT |
2184 | gpa_t gpa; |
2185 | ||
10589a46 | 2186 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
bbd9b64e CO |
2187 | |
2188 | if (gpa == UNMAPPED_GVA) { | |
c3c91fee | 2189 | kvm_inject_page_fault(vcpu, addr, 2); |
bbd9b64e CO |
2190 | return X86EMUL_PROPAGATE_FAULT; |
2191 | } | |
2192 | ||
2193 | /* For APIC access vmexit */ | |
2194 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
2195 | goto mmio; | |
2196 | ||
2197 | if (emulator_write_phys(vcpu, gpa, val, bytes)) | |
2198 | return X86EMUL_CONTINUE; | |
2199 | ||
2200 | mmio: | |
2201 | /* | |
2202 | * Is this MMIO handled locally? | |
2203 | */ | |
10589a46 | 2204 | mutex_lock(&vcpu->kvm->lock); |
92760499 | 2205 | mmio_dev = vcpu_find_mmio_dev(vcpu, gpa, bytes, 1); |
bbd9b64e CO |
2206 | if (mmio_dev) { |
2207 | kvm_iodevice_write(mmio_dev, gpa, bytes, val); | |
10589a46 | 2208 | mutex_unlock(&vcpu->kvm->lock); |
bbd9b64e CO |
2209 | return X86EMUL_CONTINUE; |
2210 | } | |
10589a46 | 2211 | mutex_unlock(&vcpu->kvm->lock); |
bbd9b64e CO |
2212 | |
2213 | vcpu->mmio_needed = 1; | |
2214 | vcpu->mmio_phys_addr = gpa; | |
2215 | vcpu->mmio_size = bytes; | |
2216 | vcpu->mmio_is_write = 1; | |
2217 | memcpy(vcpu->mmio_data, val, bytes); | |
2218 | ||
2219 | return X86EMUL_CONTINUE; | |
2220 | } | |
2221 | ||
2222 | int emulator_write_emulated(unsigned long addr, | |
2223 | const void *val, | |
2224 | unsigned int bytes, | |
2225 | struct kvm_vcpu *vcpu) | |
2226 | { | |
2227 | /* Crossing a page boundary? */ | |
2228 | if (((addr + bytes - 1) ^ addr) & PAGE_MASK) { | |
2229 | int rc, now; | |
2230 | ||
2231 | now = -addr & ~PAGE_MASK; | |
2232 | rc = emulator_write_emulated_onepage(addr, val, now, vcpu); | |
2233 | if (rc != X86EMUL_CONTINUE) | |
2234 | return rc; | |
2235 | addr += now; | |
2236 | val += now; | |
2237 | bytes -= now; | |
2238 | } | |
2239 | return emulator_write_emulated_onepage(addr, val, bytes, vcpu); | |
2240 | } | |
2241 | EXPORT_SYMBOL_GPL(emulator_write_emulated); | |
2242 | ||
2243 | static int emulator_cmpxchg_emulated(unsigned long addr, | |
2244 | const void *old, | |
2245 | const void *new, | |
2246 | unsigned int bytes, | |
2247 | struct kvm_vcpu *vcpu) | |
2248 | { | |
2249 | static int reported; | |
2250 | ||
2251 | if (!reported) { | |
2252 | reported = 1; | |
2253 | printk(KERN_WARNING "kvm: emulating exchange as write\n"); | |
2254 | } | |
2bacc55c MT |
2255 | #ifndef CONFIG_X86_64 |
2256 | /* guests cmpxchg8b have to be emulated atomically */ | |
2257 | if (bytes == 8) { | |
10589a46 | 2258 | gpa_t gpa; |
2bacc55c | 2259 | struct page *page; |
c0b49b0d | 2260 | char *kaddr; |
2bacc55c MT |
2261 | u64 val; |
2262 | ||
10589a46 MT |
2263 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
2264 | ||
2bacc55c MT |
2265 | if (gpa == UNMAPPED_GVA || |
2266 | (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
2267 | goto emul_write; | |
2268 | ||
2269 | if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK)) | |
2270 | goto emul_write; | |
2271 | ||
2272 | val = *(u64 *)new; | |
72dc67a6 | 2273 | |
2bacc55c | 2274 | page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT); |
72dc67a6 | 2275 | |
c0b49b0d AM |
2276 | kaddr = kmap_atomic(page, KM_USER0); |
2277 | set_64bit((u64 *)(kaddr + offset_in_page(gpa)), val); | |
2278 | kunmap_atomic(kaddr, KM_USER0); | |
2bacc55c MT |
2279 | kvm_release_page_dirty(page); |
2280 | } | |
3200f405 | 2281 | emul_write: |
2bacc55c MT |
2282 | #endif |
2283 | ||
bbd9b64e CO |
2284 | return emulator_write_emulated(addr, new, bytes, vcpu); |
2285 | } | |
2286 | ||
2287 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) | |
2288 | { | |
2289 | return kvm_x86_ops->get_segment_base(vcpu, seg); | |
2290 | } | |
2291 | ||
2292 | int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address) | |
2293 | { | |
a7052897 | 2294 | kvm_mmu_invlpg(vcpu, address); |
bbd9b64e CO |
2295 | return X86EMUL_CONTINUE; |
2296 | } | |
2297 | ||
2298 | int emulate_clts(struct kvm_vcpu *vcpu) | |
2299 | { | |
54e445ca | 2300 | KVMTRACE_0D(CLTS, vcpu, handler); |
ad312c7c | 2301 | kvm_x86_ops->set_cr0(vcpu, vcpu->arch.cr0 & ~X86_CR0_TS); |
bbd9b64e CO |
2302 | return X86EMUL_CONTINUE; |
2303 | } | |
2304 | ||
2305 | int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest) | |
2306 | { | |
2307 | struct kvm_vcpu *vcpu = ctxt->vcpu; | |
2308 | ||
2309 | switch (dr) { | |
2310 | case 0 ... 3: | |
2311 | *dest = kvm_x86_ops->get_dr(vcpu, dr); | |
2312 | return X86EMUL_CONTINUE; | |
2313 | default: | |
b8688d51 | 2314 | pr_unimpl(vcpu, "%s: unexpected dr %u\n", __func__, dr); |
bbd9b64e CO |
2315 | return X86EMUL_UNHANDLEABLE; |
2316 | } | |
2317 | } | |
2318 | ||
2319 | int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value) | |
2320 | { | |
2321 | unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U; | |
2322 | int exception; | |
2323 | ||
2324 | kvm_x86_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception); | |
2325 | if (exception) { | |
2326 | /* FIXME: better handling */ | |
2327 | return X86EMUL_UNHANDLEABLE; | |
2328 | } | |
2329 | return X86EMUL_CONTINUE; | |
2330 | } | |
2331 | ||
2332 | void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context) | |
2333 | { | |
bbd9b64e | 2334 | u8 opcodes[4]; |
5fdbf976 | 2335 | unsigned long rip = kvm_rip_read(vcpu); |
bbd9b64e CO |
2336 | unsigned long rip_linear; |
2337 | ||
f76c710d | 2338 | if (!printk_ratelimit()) |
bbd9b64e CO |
2339 | return; |
2340 | ||
25be4608 GC |
2341 | rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS); |
2342 | ||
77c2002e | 2343 | kvm_read_guest_virt(rip_linear, (void *)opcodes, 4, vcpu); |
bbd9b64e CO |
2344 | |
2345 | printk(KERN_ERR "emulation failed (%s) rip %lx %02x %02x %02x %02x\n", | |
2346 | context, rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]); | |
bbd9b64e CO |
2347 | } |
2348 | EXPORT_SYMBOL_GPL(kvm_report_emulation_failure); | |
2349 | ||
14af3f3c | 2350 | static struct x86_emulate_ops emulate_ops = { |
77c2002e | 2351 | .read_std = kvm_read_guest_virt, |
bbd9b64e CO |
2352 | .read_emulated = emulator_read_emulated, |
2353 | .write_emulated = emulator_write_emulated, | |
2354 | .cmpxchg_emulated = emulator_cmpxchg_emulated, | |
2355 | }; | |
2356 | ||
5fdbf976 MT |
2357 | static void cache_all_regs(struct kvm_vcpu *vcpu) |
2358 | { | |
2359 | kvm_register_read(vcpu, VCPU_REGS_RAX); | |
2360 | kvm_register_read(vcpu, VCPU_REGS_RSP); | |
2361 | kvm_register_read(vcpu, VCPU_REGS_RIP); | |
2362 | vcpu->arch.regs_dirty = ~0; | |
2363 | } | |
2364 | ||
bbd9b64e CO |
2365 | int emulate_instruction(struct kvm_vcpu *vcpu, |
2366 | struct kvm_run *run, | |
2367 | unsigned long cr2, | |
2368 | u16 error_code, | |
571008da | 2369 | int emulation_type) |
bbd9b64e CO |
2370 | { |
2371 | int r; | |
571008da | 2372 | struct decode_cache *c; |
bbd9b64e | 2373 | |
26eef70c | 2374 | kvm_clear_exception_queue(vcpu); |
ad312c7c | 2375 | vcpu->arch.mmio_fault_cr2 = cr2; |
5fdbf976 MT |
2376 | /* |
2377 | * TODO: fix x86_emulate.c to use guest_read/write_register | |
2378 | * instead of direct ->regs accesses, can save hundred cycles | |
2379 | * on Intel for instructions that don't read/change RSP, for | |
2380 | * for example. | |
2381 | */ | |
2382 | cache_all_regs(vcpu); | |
bbd9b64e CO |
2383 | |
2384 | vcpu->mmio_is_write = 0; | |
ad312c7c | 2385 | vcpu->arch.pio.string = 0; |
bbd9b64e | 2386 | |
571008da | 2387 | if (!(emulation_type & EMULTYPE_NO_DECODE)) { |
bbd9b64e CO |
2388 | int cs_db, cs_l; |
2389 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
2390 | ||
ad312c7c ZX |
2391 | vcpu->arch.emulate_ctxt.vcpu = vcpu; |
2392 | vcpu->arch.emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu); | |
2393 | vcpu->arch.emulate_ctxt.mode = | |
2394 | (vcpu->arch.emulate_ctxt.eflags & X86_EFLAGS_VM) | |
bbd9b64e CO |
2395 | ? X86EMUL_MODE_REAL : cs_l |
2396 | ? X86EMUL_MODE_PROT64 : cs_db | |
2397 | ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16; | |
2398 | ||
ad312c7c | 2399 | r = x86_decode_insn(&vcpu->arch.emulate_ctxt, &emulate_ops); |
571008da SY |
2400 | |
2401 | /* Reject the instructions other than VMCALL/VMMCALL when | |
2402 | * try to emulate invalid opcode */ | |
2403 | c = &vcpu->arch.emulate_ctxt.decode; | |
2404 | if ((emulation_type & EMULTYPE_TRAP_UD) && | |
2405 | (!(c->twobyte && c->b == 0x01 && | |
2406 | (c->modrm_reg == 0 || c->modrm_reg == 3) && | |
2407 | c->modrm_mod == 3 && c->modrm_rm == 1))) | |
2408 | return EMULATE_FAIL; | |
2409 | ||
f2b5756b | 2410 | ++vcpu->stat.insn_emulation; |
bbd9b64e | 2411 | if (r) { |
f2b5756b | 2412 | ++vcpu->stat.insn_emulation_fail; |
bbd9b64e CO |
2413 | if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) |
2414 | return EMULATE_DONE; | |
2415 | return EMULATE_FAIL; | |
2416 | } | |
2417 | } | |
2418 | ||
ad312c7c | 2419 | r = x86_emulate_insn(&vcpu->arch.emulate_ctxt, &emulate_ops); |
bbd9b64e | 2420 | |
ad312c7c | 2421 | if (vcpu->arch.pio.string) |
bbd9b64e CO |
2422 | return EMULATE_DO_MMIO; |
2423 | ||
2424 | if ((r || vcpu->mmio_is_write) && run) { | |
2425 | run->exit_reason = KVM_EXIT_MMIO; | |
2426 | run->mmio.phys_addr = vcpu->mmio_phys_addr; | |
2427 | memcpy(run->mmio.data, vcpu->mmio_data, 8); | |
2428 | run->mmio.len = vcpu->mmio_size; | |
2429 | run->mmio.is_write = vcpu->mmio_is_write; | |
2430 | } | |
2431 | ||
2432 | if (r) { | |
2433 | if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) | |
2434 | return EMULATE_DONE; | |
2435 | if (!vcpu->mmio_needed) { | |
2436 | kvm_report_emulation_failure(vcpu, "mmio"); | |
2437 | return EMULATE_FAIL; | |
2438 | } | |
2439 | return EMULATE_DO_MMIO; | |
2440 | } | |
2441 | ||
ad312c7c | 2442 | kvm_x86_ops->set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags); |
bbd9b64e CO |
2443 | |
2444 | if (vcpu->mmio_is_write) { | |
2445 | vcpu->mmio_needed = 0; | |
2446 | return EMULATE_DO_MMIO; | |
2447 | } | |
2448 | ||
2449 | return EMULATE_DONE; | |
2450 | } | |
2451 | EXPORT_SYMBOL_GPL(emulate_instruction); | |
2452 | ||
de7d789a CO |
2453 | static int pio_copy_data(struct kvm_vcpu *vcpu) |
2454 | { | |
ad312c7c | 2455 | void *p = vcpu->arch.pio_data; |
0f346074 | 2456 | gva_t q = vcpu->arch.pio.guest_gva; |
de7d789a | 2457 | unsigned bytes; |
0f346074 | 2458 | int ret; |
de7d789a | 2459 | |
ad312c7c ZX |
2460 | bytes = vcpu->arch.pio.size * vcpu->arch.pio.cur_count; |
2461 | if (vcpu->arch.pio.in) | |
0f346074 | 2462 | ret = kvm_write_guest_virt(q, p, bytes, vcpu); |
de7d789a | 2463 | else |
0f346074 IE |
2464 | ret = kvm_read_guest_virt(q, p, bytes, vcpu); |
2465 | return ret; | |
de7d789a CO |
2466 | } |
2467 | ||
2468 | int complete_pio(struct kvm_vcpu *vcpu) | |
2469 | { | |
ad312c7c | 2470 | struct kvm_pio_request *io = &vcpu->arch.pio; |
de7d789a CO |
2471 | long delta; |
2472 | int r; | |
5fdbf976 | 2473 | unsigned long val; |
de7d789a CO |
2474 | |
2475 | if (!io->string) { | |
5fdbf976 MT |
2476 | if (io->in) { |
2477 | val = kvm_register_read(vcpu, VCPU_REGS_RAX); | |
2478 | memcpy(&val, vcpu->arch.pio_data, io->size); | |
2479 | kvm_register_write(vcpu, VCPU_REGS_RAX, val); | |
2480 | } | |
de7d789a CO |
2481 | } else { |
2482 | if (io->in) { | |
2483 | r = pio_copy_data(vcpu); | |
5fdbf976 | 2484 | if (r) |
de7d789a | 2485 | return r; |
de7d789a CO |
2486 | } |
2487 | ||
2488 | delta = 1; | |
2489 | if (io->rep) { | |
2490 | delta *= io->cur_count; | |
2491 | /* | |
2492 | * The size of the register should really depend on | |
2493 | * current address size. | |
2494 | */ | |
5fdbf976 MT |
2495 | val = kvm_register_read(vcpu, VCPU_REGS_RCX); |
2496 | val -= delta; | |
2497 | kvm_register_write(vcpu, VCPU_REGS_RCX, val); | |
de7d789a CO |
2498 | } |
2499 | if (io->down) | |
2500 | delta = -delta; | |
2501 | delta *= io->size; | |
5fdbf976 MT |
2502 | if (io->in) { |
2503 | val = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
2504 | val += delta; | |
2505 | kvm_register_write(vcpu, VCPU_REGS_RDI, val); | |
2506 | } else { | |
2507 | val = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
2508 | val += delta; | |
2509 | kvm_register_write(vcpu, VCPU_REGS_RSI, val); | |
2510 | } | |
de7d789a CO |
2511 | } |
2512 | ||
de7d789a CO |
2513 | io->count -= io->cur_count; |
2514 | io->cur_count = 0; | |
2515 | ||
2516 | return 0; | |
2517 | } | |
2518 | ||
2519 | static void kernel_pio(struct kvm_io_device *pio_dev, | |
2520 | struct kvm_vcpu *vcpu, | |
2521 | void *pd) | |
2522 | { | |
2523 | /* TODO: String I/O for in kernel device */ | |
2524 | ||
2525 | mutex_lock(&vcpu->kvm->lock); | |
ad312c7c ZX |
2526 | if (vcpu->arch.pio.in) |
2527 | kvm_iodevice_read(pio_dev, vcpu->arch.pio.port, | |
2528 | vcpu->arch.pio.size, | |
de7d789a CO |
2529 | pd); |
2530 | else | |
ad312c7c ZX |
2531 | kvm_iodevice_write(pio_dev, vcpu->arch.pio.port, |
2532 | vcpu->arch.pio.size, | |
de7d789a CO |
2533 | pd); |
2534 | mutex_unlock(&vcpu->kvm->lock); | |
2535 | } | |
2536 | ||
2537 | static void pio_string_write(struct kvm_io_device *pio_dev, | |
2538 | struct kvm_vcpu *vcpu) | |
2539 | { | |
ad312c7c ZX |
2540 | struct kvm_pio_request *io = &vcpu->arch.pio; |
2541 | void *pd = vcpu->arch.pio_data; | |
de7d789a CO |
2542 | int i; |
2543 | ||
2544 | mutex_lock(&vcpu->kvm->lock); | |
2545 | for (i = 0; i < io->cur_count; i++) { | |
2546 | kvm_iodevice_write(pio_dev, io->port, | |
2547 | io->size, | |
2548 | pd); | |
2549 | pd += io->size; | |
2550 | } | |
2551 | mutex_unlock(&vcpu->kvm->lock); | |
2552 | } | |
2553 | ||
2554 | static struct kvm_io_device *vcpu_find_pio_dev(struct kvm_vcpu *vcpu, | |
92760499 LV |
2555 | gpa_t addr, int len, |
2556 | int is_write) | |
de7d789a | 2557 | { |
92760499 | 2558 | return kvm_io_bus_find_dev(&vcpu->kvm->pio_bus, addr, len, is_write); |
de7d789a CO |
2559 | } |
2560 | ||
2561 | int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, | |
2562 | int size, unsigned port) | |
2563 | { | |
2564 | struct kvm_io_device *pio_dev; | |
5fdbf976 | 2565 | unsigned long val; |
de7d789a CO |
2566 | |
2567 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
2568 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; | |
ad312c7c | 2569 | vcpu->run->io.size = vcpu->arch.pio.size = size; |
de7d789a | 2570 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; |
ad312c7c ZX |
2571 | vcpu->run->io.count = vcpu->arch.pio.count = vcpu->arch.pio.cur_count = 1; |
2572 | vcpu->run->io.port = vcpu->arch.pio.port = port; | |
2573 | vcpu->arch.pio.in = in; | |
2574 | vcpu->arch.pio.string = 0; | |
2575 | vcpu->arch.pio.down = 0; | |
ad312c7c | 2576 | vcpu->arch.pio.rep = 0; |
de7d789a | 2577 | |
2714d1d3 FEL |
2578 | if (vcpu->run->io.direction == KVM_EXIT_IO_IN) |
2579 | KVMTRACE_2D(IO_READ, vcpu, vcpu->run->io.port, (u32)size, | |
2580 | handler); | |
2581 | else | |
2582 | KVMTRACE_2D(IO_WRITE, vcpu, vcpu->run->io.port, (u32)size, | |
2583 | handler); | |
2584 | ||
5fdbf976 MT |
2585 | val = kvm_register_read(vcpu, VCPU_REGS_RAX); |
2586 | memcpy(vcpu->arch.pio_data, &val, 4); | |
de7d789a | 2587 | |
92760499 | 2588 | pio_dev = vcpu_find_pio_dev(vcpu, port, size, !in); |
de7d789a | 2589 | if (pio_dev) { |
ad312c7c | 2590 | kernel_pio(pio_dev, vcpu, vcpu->arch.pio_data); |
de7d789a CO |
2591 | complete_pio(vcpu); |
2592 | return 1; | |
2593 | } | |
2594 | return 0; | |
2595 | } | |
2596 | EXPORT_SYMBOL_GPL(kvm_emulate_pio); | |
2597 | ||
2598 | int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, | |
2599 | int size, unsigned long count, int down, | |
2600 | gva_t address, int rep, unsigned port) | |
2601 | { | |
2602 | unsigned now, in_page; | |
0f346074 | 2603 | int ret = 0; |
de7d789a CO |
2604 | struct kvm_io_device *pio_dev; |
2605 | ||
2606 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
2607 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; | |
ad312c7c | 2608 | vcpu->run->io.size = vcpu->arch.pio.size = size; |
de7d789a | 2609 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; |
ad312c7c ZX |
2610 | vcpu->run->io.count = vcpu->arch.pio.count = vcpu->arch.pio.cur_count = count; |
2611 | vcpu->run->io.port = vcpu->arch.pio.port = port; | |
2612 | vcpu->arch.pio.in = in; | |
2613 | vcpu->arch.pio.string = 1; | |
2614 | vcpu->arch.pio.down = down; | |
ad312c7c | 2615 | vcpu->arch.pio.rep = rep; |
de7d789a | 2616 | |
2714d1d3 FEL |
2617 | if (vcpu->run->io.direction == KVM_EXIT_IO_IN) |
2618 | KVMTRACE_2D(IO_READ, vcpu, vcpu->run->io.port, (u32)size, | |
2619 | handler); | |
2620 | else | |
2621 | KVMTRACE_2D(IO_WRITE, vcpu, vcpu->run->io.port, (u32)size, | |
2622 | handler); | |
2623 | ||
de7d789a CO |
2624 | if (!count) { |
2625 | kvm_x86_ops->skip_emulated_instruction(vcpu); | |
2626 | return 1; | |
2627 | } | |
2628 | ||
2629 | if (!down) | |
2630 | in_page = PAGE_SIZE - offset_in_page(address); | |
2631 | else | |
2632 | in_page = offset_in_page(address) + size; | |
2633 | now = min(count, (unsigned long)in_page / size); | |
0f346074 | 2634 | if (!now) |
de7d789a | 2635 | now = 1; |
de7d789a CO |
2636 | if (down) { |
2637 | /* | |
2638 | * String I/O in reverse. Yuck. Kill the guest, fix later. | |
2639 | */ | |
2640 | pr_unimpl(vcpu, "guest string pio down\n"); | |
c1a5d4f9 | 2641 | kvm_inject_gp(vcpu, 0); |
de7d789a CO |
2642 | return 1; |
2643 | } | |
2644 | vcpu->run->io.count = now; | |
ad312c7c | 2645 | vcpu->arch.pio.cur_count = now; |
de7d789a | 2646 | |
ad312c7c | 2647 | if (vcpu->arch.pio.cur_count == vcpu->arch.pio.count) |
de7d789a CO |
2648 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
2649 | ||
0f346074 | 2650 | vcpu->arch.pio.guest_gva = address; |
de7d789a | 2651 | |
92760499 LV |
2652 | pio_dev = vcpu_find_pio_dev(vcpu, port, |
2653 | vcpu->arch.pio.cur_count, | |
2654 | !vcpu->arch.pio.in); | |
ad312c7c | 2655 | if (!vcpu->arch.pio.in) { |
de7d789a CO |
2656 | /* string PIO write */ |
2657 | ret = pio_copy_data(vcpu); | |
0f346074 IE |
2658 | if (ret == X86EMUL_PROPAGATE_FAULT) { |
2659 | kvm_inject_gp(vcpu, 0); | |
2660 | return 1; | |
2661 | } | |
2662 | if (ret == 0 && pio_dev) { | |
de7d789a CO |
2663 | pio_string_write(pio_dev, vcpu); |
2664 | complete_pio(vcpu); | |
ad312c7c | 2665 | if (vcpu->arch.pio.count == 0) |
de7d789a CO |
2666 | ret = 1; |
2667 | } | |
2668 | } else if (pio_dev) | |
2669 | pr_unimpl(vcpu, "no string pio read support yet, " | |
2670 | "port %x size %d count %ld\n", | |
2671 | port, size, count); | |
2672 | ||
2673 | return ret; | |
2674 | } | |
2675 | EXPORT_SYMBOL_GPL(kvm_emulate_pio_string); | |
2676 | ||
c8076604 GH |
2677 | static void bounce_off(void *info) |
2678 | { | |
2679 | /* nothing */ | |
2680 | } | |
2681 | ||
2682 | static unsigned int ref_freq; | |
2683 | static unsigned long tsc_khz_ref; | |
2684 | ||
2685 | static int kvmclock_cpufreq_notifier(struct notifier_block *nb, unsigned long val, | |
2686 | void *data) | |
2687 | { | |
2688 | struct cpufreq_freqs *freq = data; | |
2689 | struct kvm *kvm; | |
2690 | struct kvm_vcpu *vcpu; | |
2691 | int i, send_ipi = 0; | |
2692 | ||
2693 | if (!ref_freq) | |
2694 | ref_freq = freq->old; | |
2695 | ||
2696 | if (val == CPUFREQ_PRECHANGE && freq->old > freq->new) | |
2697 | return 0; | |
2698 | if (val == CPUFREQ_POSTCHANGE && freq->old < freq->new) | |
2699 | return 0; | |
2700 | per_cpu(cpu_tsc_khz, freq->cpu) = cpufreq_scale(tsc_khz_ref, ref_freq, freq->new); | |
2701 | ||
2702 | spin_lock(&kvm_lock); | |
2703 | list_for_each_entry(kvm, &vm_list, vm_list) { | |
2704 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
2705 | vcpu = kvm->vcpus[i]; | |
2706 | if (!vcpu) | |
2707 | continue; | |
2708 | if (vcpu->cpu != freq->cpu) | |
2709 | continue; | |
2710 | if (!kvm_request_guest_time_update(vcpu)) | |
2711 | continue; | |
2712 | if (vcpu->cpu != smp_processor_id()) | |
2713 | send_ipi++; | |
2714 | } | |
2715 | } | |
2716 | spin_unlock(&kvm_lock); | |
2717 | ||
2718 | if (freq->old < freq->new && send_ipi) { | |
2719 | /* | |
2720 | * We upscale the frequency. Must make the guest | |
2721 | * doesn't see old kvmclock values while running with | |
2722 | * the new frequency, otherwise we risk the guest sees | |
2723 | * time go backwards. | |
2724 | * | |
2725 | * In case we update the frequency for another cpu | |
2726 | * (which might be in guest context) send an interrupt | |
2727 | * to kick the cpu out of guest context. Next time | |
2728 | * guest context is entered kvmclock will be updated, | |
2729 | * so the guest will not see stale values. | |
2730 | */ | |
2731 | smp_call_function_single(freq->cpu, bounce_off, NULL, 1); | |
2732 | } | |
2733 | return 0; | |
2734 | } | |
2735 | ||
2736 | static struct notifier_block kvmclock_cpufreq_notifier_block = { | |
2737 | .notifier_call = kvmclock_cpufreq_notifier | |
2738 | }; | |
2739 | ||
f8c16bba | 2740 | int kvm_arch_init(void *opaque) |
043405e1 | 2741 | { |
c8076604 | 2742 | int r, cpu; |
f8c16bba ZX |
2743 | struct kvm_x86_ops *ops = (struct kvm_x86_ops *)opaque; |
2744 | ||
f8c16bba ZX |
2745 | if (kvm_x86_ops) { |
2746 | printk(KERN_ERR "kvm: already loaded the other module\n"); | |
56c6d28a ZX |
2747 | r = -EEXIST; |
2748 | goto out; | |
f8c16bba ZX |
2749 | } |
2750 | ||
2751 | if (!ops->cpu_has_kvm_support()) { | |
2752 | printk(KERN_ERR "kvm: no hardware support\n"); | |
56c6d28a ZX |
2753 | r = -EOPNOTSUPP; |
2754 | goto out; | |
f8c16bba ZX |
2755 | } |
2756 | if (ops->disabled_by_bios()) { | |
2757 | printk(KERN_ERR "kvm: disabled by bios\n"); | |
56c6d28a ZX |
2758 | r = -EOPNOTSUPP; |
2759 | goto out; | |
f8c16bba ZX |
2760 | } |
2761 | ||
97db56ce AK |
2762 | r = kvm_mmu_module_init(); |
2763 | if (r) | |
2764 | goto out; | |
2765 | ||
2766 | kvm_init_msr_list(); | |
2767 | ||
f8c16bba | 2768 | kvm_x86_ops = ops; |
56c6d28a | 2769 | kvm_mmu_set_nonpresent_ptes(0ull, 0ull); |
7b52345e SY |
2770 | kvm_mmu_set_base_ptes(PT_PRESENT_MASK); |
2771 | kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK, | |
64d4d521 | 2772 | PT_DIRTY_MASK, PT64_NX_MASK, 0, 0); |
c8076604 GH |
2773 | |
2774 | for_each_possible_cpu(cpu) | |
2775 | per_cpu(cpu_tsc_khz, cpu) = tsc_khz; | |
2776 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) { | |
2777 | tsc_khz_ref = tsc_khz; | |
2778 | cpufreq_register_notifier(&kvmclock_cpufreq_notifier_block, | |
2779 | CPUFREQ_TRANSITION_NOTIFIER); | |
2780 | } | |
2781 | ||
f8c16bba | 2782 | return 0; |
56c6d28a ZX |
2783 | |
2784 | out: | |
56c6d28a | 2785 | return r; |
043405e1 | 2786 | } |
8776e519 | 2787 | |
f8c16bba ZX |
2788 | void kvm_arch_exit(void) |
2789 | { | |
888d256e JK |
2790 | if (!boot_cpu_has(X86_FEATURE_CONSTANT_TSC)) |
2791 | cpufreq_unregister_notifier(&kvmclock_cpufreq_notifier_block, | |
2792 | CPUFREQ_TRANSITION_NOTIFIER); | |
f8c16bba | 2793 | kvm_x86_ops = NULL; |
56c6d28a ZX |
2794 | kvm_mmu_module_exit(); |
2795 | } | |
f8c16bba | 2796 | |
8776e519 HB |
2797 | int kvm_emulate_halt(struct kvm_vcpu *vcpu) |
2798 | { | |
2799 | ++vcpu->stat.halt_exits; | |
2714d1d3 | 2800 | KVMTRACE_0D(HLT, vcpu, handler); |
8776e519 | 2801 | if (irqchip_in_kernel(vcpu->kvm)) { |
a4535290 | 2802 | vcpu->arch.mp_state = KVM_MP_STATE_HALTED; |
8776e519 HB |
2803 | return 1; |
2804 | } else { | |
2805 | vcpu->run->exit_reason = KVM_EXIT_HLT; | |
2806 | return 0; | |
2807 | } | |
2808 | } | |
2809 | EXPORT_SYMBOL_GPL(kvm_emulate_halt); | |
2810 | ||
2f333bcb MT |
2811 | static inline gpa_t hc_gpa(struct kvm_vcpu *vcpu, unsigned long a0, |
2812 | unsigned long a1) | |
2813 | { | |
2814 | if (is_long_mode(vcpu)) | |
2815 | return a0; | |
2816 | else | |
2817 | return a0 | ((gpa_t)a1 << 32); | |
2818 | } | |
2819 | ||
8776e519 HB |
2820 | int kvm_emulate_hypercall(struct kvm_vcpu *vcpu) |
2821 | { | |
2822 | unsigned long nr, a0, a1, a2, a3, ret; | |
2f333bcb | 2823 | int r = 1; |
8776e519 | 2824 | |
5fdbf976 MT |
2825 | nr = kvm_register_read(vcpu, VCPU_REGS_RAX); |
2826 | a0 = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
2827 | a1 = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
2828 | a2 = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
2829 | a3 = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
8776e519 | 2830 | |
2714d1d3 FEL |
2831 | KVMTRACE_1D(VMMCALL, vcpu, (u32)nr, handler); |
2832 | ||
8776e519 HB |
2833 | if (!is_long_mode(vcpu)) { |
2834 | nr &= 0xFFFFFFFF; | |
2835 | a0 &= 0xFFFFFFFF; | |
2836 | a1 &= 0xFFFFFFFF; | |
2837 | a2 &= 0xFFFFFFFF; | |
2838 | a3 &= 0xFFFFFFFF; | |
2839 | } | |
2840 | ||
2841 | switch (nr) { | |
b93463aa AK |
2842 | case KVM_HC_VAPIC_POLL_IRQ: |
2843 | ret = 0; | |
2844 | break; | |
2f333bcb MT |
2845 | case KVM_HC_MMU_OP: |
2846 | r = kvm_pv_mmu_op(vcpu, a0, hc_gpa(vcpu, a1, a2), &ret); | |
2847 | break; | |
8776e519 HB |
2848 | default: |
2849 | ret = -KVM_ENOSYS; | |
2850 | break; | |
2851 | } | |
5fdbf976 | 2852 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); |
f11c3a8d | 2853 | ++vcpu->stat.hypercalls; |
2f333bcb | 2854 | return r; |
8776e519 HB |
2855 | } |
2856 | EXPORT_SYMBOL_GPL(kvm_emulate_hypercall); | |
2857 | ||
2858 | int kvm_fix_hypercall(struct kvm_vcpu *vcpu) | |
2859 | { | |
2860 | char instruction[3]; | |
2861 | int ret = 0; | |
5fdbf976 | 2862 | unsigned long rip = kvm_rip_read(vcpu); |
8776e519 | 2863 | |
8776e519 HB |
2864 | |
2865 | /* | |
2866 | * Blow out the MMU to ensure that no other VCPU has an active mapping | |
2867 | * to ensure that the updated hypercall appears atomically across all | |
2868 | * VCPUs. | |
2869 | */ | |
2870 | kvm_mmu_zap_all(vcpu->kvm); | |
2871 | ||
8776e519 | 2872 | kvm_x86_ops->patch_hypercall(vcpu, instruction); |
5fdbf976 | 2873 | if (emulator_write_emulated(rip, instruction, 3, vcpu) |
8776e519 HB |
2874 | != X86EMUL_CONTINUE) |
2875 | ret = -EFAULT; | |
2876 | ||
8776e519 HB |
2877 | return ret; |
2878 | } | |
2879 | ||
2880 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) | |
2881 | { | |
2882 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; | |
2883 | } | |
2884 | ||
2885 | void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
2886 | { | |
2887 | struct descriptor_table dt = { limit, base }; | |
2888 | ||
2889 | kvm_x86_ops->set_gdt(vcpu, &dt); | |
2890 | } | |
2891 | ||
2892 | void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
2893 | { | |
2894 | struct descriptor_table dt = { limit, base }; | |
2895 | ||
2896 | kvm_x86_ops->set_idt(vcpu, &dt); | |
2897 | } | |
2898 | ||
2899 | void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw, | |
2900 | unsigned long *rflags) | |
2901 | { | |
2d3ad1f4 | 2902 | kvm_lmsw(vcpu, msw); |
8776e519 HB |
2903 | *rflags = kvm_x86_ops->get_rflags(vcpu); |
2904 | } | |
2905 | ||
2906 | unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr) | |
2907 | { | |
54e445ca JR |
2908 | unsigned long value; |
2909 | ||
8776e519 HB |
2910 | kvm_x86_ops->decache_cr4_guest_bits(vcpu); |
2911 | switch (cr) { | |
2912 | case 0: | |
54e445ca JR |
2913 | value = vcpu->arch.cr0; |
2914 | break; | |
8776e519 | 2915 | case 2: |
54e445ca JR |
2916 | value = vcpu->arch.cr2; |
2917 | break; | |
8776e519 | 2918 | case 3: |
54e445ca JR |
2919 | value = vcpu->arch.cr3; |
2920 | break; | |
8776e519 | 2921 | case 4: |
54e445ca JR |
2922 | value = vcpu->arch.cr4; |
2923 | break; | |
152ff9be | 2924 | case 8: |
54e445ca JR |
2925 | value = kvm_get_cr8(vcpu); |
2926 | break; | |
8776e519 | 2927 | default: |
b8688d51 | 2928 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr); |
8776e519 HB |
2929 | return 0; |
2930 | } | |
54e445ca JR |
2931 | KVMTRACE_3D(CR_READ, vcpu, (u32)cr, (u32)value, |
2932 | (u32)((u64)value >> 32), handler); | |
2933 | ||
2934 | return value; | |
8776e519 HB |
2935 | } |
2936 | ||
2937 | void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val, | |
2938 | unsigned long *rflags) | |
2939 | { | |
54e445ca JR |
2940 | KVMTRACE_3D(CR_WRITE, vcpu, (u32)cr, (u32)val, |
2941 | (u32)((u64)val >> 32), handler); | |
2942 | ||
8776e519 HB |
2943 | switch (cr) { |
2944 | case 0: | |
2d3ad1f4 | 2945 | kvm_set_cr0(vcpu, mk_cr_64(vcpu->arch.cr0, val)); |
8776e519 HB |
2946 | *rflags = kvm_x86_ops->get_rflags(vcpu); |
2947 | break; | |
2948 | case 2: | |
ad312c7c | 2949 | vcpu->arch.cr2 = val; |
8776e519 HB |
2950 | break; |
2951 | case 3: | |
2d3ad1f4 | 2952 | kvm_set_cr3(vcpu, val); |
8776e519 HB |
2953 | break; |
2954 | case 4: | |
2d3ad1f4 | 2955 | kvm_set_cr4(vcpu, mk_cr_64(vcpu->arch.cr4, val)); |
8776e519 | 2956 | break; |
152ff9be | 2957 | case 8: |
2d3ad1f4 | 2958 | kvm_set_cr8(vcpu, val & 0xfUL); |
152ff9be | 2959 | break; |
8776e519 | 2960 | default: |
b8688d51 | 2961 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr); |
8776e519 HB |
2962 | } |
2963 | } | |
2964 | ||
07716717 DK |
2965 | static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu *vcpu, int i) |
2966 | { | |
ad312c7c ZX |
2967 | struct kvm_cpuid_entry2 *e = &vcpu->arch.cpuid_entries[i]; |
2968 | int j, nent = vcpu->arch.cpuid_nent; | |
07716717 DK |
2969 | |
2970 | e->flags &= ~KVM_CPUID_FLAG_STATE_READ_NEXT; | |
2971 | /* when no next entry is found, the current entry[i] is reselected */ | |
0fdf8e59 | 2972 | for (j = i + 1; ; j = (j + 1) % nent) { |
ad312c7c | 2973 | struct kvm_cpuid_entry2 *ej = &vcpu->arch.cpuid_entries[j]; |
07716717 DK |
2974 | if (ej->function == e->function) { |
2975 | ej->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT; | |
2976 | return j; | |
2977 | } | |
2978 | } | |
2979 | return 0; /* silence gcc, even though control never reaches here */ | |
2980 | } | |
2981 | ||
2982 | /* find an entry with matching function, matching index (if needed), and that | |
2983 | * should be read next (if it's stateful) */ | |
2984 | static int is_matching_cpuid_entry(struct kvm_cpuid_entry2 *e, | |
2985 | u32 function, u32 index) | |
2986 | { | |
2987 | if (e->function != function) | |
2988 | return 0; | |
2989 | if ((e->flags & KVM_CPUID_FLAG_SIGNIFCANT_INDEX) && e->index != index) | |
2990 | return 0; | |
2991 | if ((e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) && | |
19355475 | 2992 | !(e->flags & KVM_CPUID_FLAG_STATE_READ_NEXT)) |
07716717 DK |
2993 | return 0; |
2994 | return 1; | |
2995 | } | |
2996 | ||
d8017474 AG |
2997 | struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu, |
2998 | u32 function, u32 index) | |
8776e519 HB |
2999 | { |
3000 | int i; | |
d8017474 | 3001 | struct kvm_cpuid_entry2 *best = NULL; |
8776e519 | 3002 | |
ad312c7c | 3003 | for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { |
d8017474 AG |
3004 | struct kvm_cpuid_entry2 *e; |
3005 | ||
ad312c7c | 3006 | e = &vcpu->arch.cpuid_entries[i]; |
07716717 DK |
3007 | if (is_matching_cpuid_entry(e, function, index)) { |
3008 | if (e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) | |
3009 | move_to_next_stateful_cpuid_entry(vcpu, i); | |
8776e519 HB |
3010 | best = e; |
3011 | break; | |
3012 | } | |
3013 | /* | |
3014 | * Both basic or both extended? | |
3015 | */ | |
3016 | if (((e->function ^ function) & 0x80000000) == 0) | |
3017 | if (!best || e->function > best->function) | |
3018 | best = e; | |
3019 | } | |
d8017474 AG |
3020 | return best; |
3021 | } | |
3022 | ||
82725b20 DE |
3023 | int cpuid_maxphyaddr(struct kvm_vcpu *vcpu) |
3024 | { | |
3025 | struct kvm_cpuid_entry2 *best; | |
3026 | ||
3027 | best = kvm_find_cpuid_entry(vcpu, 0x80000008, 0); | |
3028 | if (best) | |
3029 | return best->eax & 0xff; | |
3030 | return 36; | |
3031 | } | |
3032 | ||
d8017474 AG |
3033 | void kvm_emulate_cpuid(struct kvm_vcpu *vcpu) |
3034 | { | |
3035 | u32 function, index; | |
3036 | struct kvm_cpuid_entry2 *best; | |
3037 | ||
3038 | function = kvm_register_read(vcpu, VCPU_REGS_RAX); | |
3039 | index = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
3040 | kvm_register_write(vcpu, VCPU_REGS_RAX, 0); | |
3041 | kvm_register_write(vcpu, VCPU_REGS_RBX, 0); | |
3042 | kvm_register_write(vcpu, VCPU_REGS_RCX, 0); | |
3043 | kvm_register_write(vcpu, VCPU_REGS_RDX, 0); | |
3044 | best = kvm_find_cpuid_entry(vcpu, function, index); | |
8776e519 | 3045 | if (best) { |
5fdbf976 MT |
3046 | kvm_register_write(vcpu, VCPU_REGS_RAX, best->eax); |
3047 | kvm_register_write(vcpu, VCPU_REGS_RBX, best->ebx); | |
3048 | kvm_register_write(vcpu, VCPU_REGS_RCX, best->ecx); | |
3049 | kvm_register_write(vcpu, VCPU_REGS_RDX, best->edx); | |
8776e519 | 3050 | } |
8776e519 | 3051 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
2714d1d3 | 3052 | KVMTRACE_5D(CPUID, vcpu, function, |
5fdbf976 MT |
3053 | (u32)kvm_register_read(vcpu, VCPU_REGS_RAX), |
3054 | (u32)kvm_register_read(vcpu, VCPU_REGS_RBX), | |
3055 | (u32)kvm_register_read(vcpu, VCPU_REGS_RCX), | |
3056 | (u32)kvm_register_read(vcpu, VCPU_REGS_RDX), handler); | |
8776e519 HB |
3057 | } |
3058 | EXPORT_SYMBOL_GPL(kvm_emulate_cpuid); | |
d0752060 | 3059 | |
b6c7a5dc HB |
3060 | /* |
3061 | * Check if userspace requested an interrupt window, and that the | |
3062 | * interrupt window is open. | |
3063 | * | |
3064 | * No need to exit to userspace if we already have an interrupt queued. | |
3065 | */ | |
3066 | static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu, | |
3067 | struct kvm_run *kvm_run) | |
3068 | { | |
ad312c7c | 3069 | return (!vcpu->arch.irq_summary && |
b6c7a5dc | 3070 | kvm_run->request_interrupt_window && |
ad312c7c | 3071 | vcpu->arch.interrupt_window_open && |
b6c7a5dc HB |
3072 | (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF)); |
3073 | } | |
3074 | ||
3075 | static void post_kvm_run_save(struct kvm_vcpu *vcpu, | |
3076 | struct kvm_run *kvm_run) | |
3077 | { | |
3078 | kvm_run->if_flag = (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF) != 0; | |
2d3ad1f4 | 3079 | kvm_run->cr8 = kvm_get_cr8(vcpu); |
b6c7a5dc | 3080 | kvm_run->apic_base = kvm_get_apic_base(vcpu); |
4531220b | 3081 | if (irqchip_in_kernel(vcpu->kvm)) |
b6c7a5dc | 3082 | kvm_run->ready_for_interrupt_injection = 1; |
4531220b | 3083 | else |
b6c7a5dc | 3084 | kvm_run->ready_for_interrupt_injection = |
ad312c7c ZX |
3085 | (vcpu->arch.interrupt_window_open && |
3086 | vcpu->arch.irq_summary == 0); | |
b6c7a5dc HB |
3087 | } |
3088 | ||
b93463aa AK |
3089 | static void vapic_enter(struct kvm_vcpu *vcpu) |
3090 | { | |
3091 | struct kvm_lapic *apic = vcpu->arch.apic; | |
3092 | struct page *page; | |
3093 | ||
3094 | if (!apic || !apic->vapic_addr) | |
3095 | return; | |
3096 | ||
3097 | page = gfn_to_page(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); | |
72dc67a6 IE |
3098 | |
3099 | vcpu->arch.apic->vapic_page = page; | |
b93463aa AK |
3100 | } |
3101 | ||
3102 | static void vapic_exit(struct kvm_vcpu *vcpu) | |
3103 | { | |
3104 | struct kvm_lapic *apic = vcpu->arch.apic; | |
3105 | ||
3106 | if (!apic || !apic->vapic_addr) | |
3107 | return; | |
3108 | ||
f8b78fa3 | 3109 | down_read(&vcpu->kvm->slots_lock); |
b93463aa AK |
3110 | kvm_release_page_dirty(apic->vapic_page); |
3111 | mark_page_dirty(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); | |
f8b78fa3 | 3112 | up_read(&vcpu->kvm->slots_lock); |
b93463aa AK |
3113 | } |
3114 | ||
d7690175 | 3115 | static int vcpu_enter_guest(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
b6c7a5dc HB |
3116 | { |
3117 | int r; | |
3118 | ||
2e53d63a MT |
3119 | if (vcpu->requests) |
3120 | if (test_and_clear_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests)) | |
3121 | kvm_mmu_unload(vcpu); | |
3122 | ||
b6c7a5dc HB |
3123 | r = kvm_mmu_reload(vcpu); |
3124 | if (unlikely(r)) | |
3125 | goto out; | |
3126 | ||
2f52d58c AK |
3127 | if (vcpu->requests) { |
3128 | if (test_and_clear_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests)) | |
2f599714 | 3129 | __kvm_migrate_timers(vcpu); |
c8076604 GH |
3130 | if (test_and_clear_bit(KVM_REQ_KVMCLOCK_UPDATE, &vcpu->requests)) |
3131 | kvm_write_guest_time(vcpu); | |
4731d4c7 MT |
3132 | if (test_and_clear_bit(KVM_REQ_MMU_SYNC, &vcpu->requests)) |
3133 | kvm_mmu_sync_roots(vcpu); | |
d4acf7e7 MT |
3134 | if (test_and_clear_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests)) |
3135 | kvm_x86_ops->tlb_flush(vcpu); | |
b93463aa AK |
3136 | if (test_and_clear_bit(KVM_REQ_REPORT_TPR_ACCESS, |
3137 | &vcpu->requests)) { | |
3138 | kvm_run->exit_reason = KVM_EXIT_TPR_ACCESS; | |
3139 | r = 0; | |
3140 | goto out; | |
3141 | } | |
71c4dfaf JR |
3142 | if (test_and_clear_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests)) { |
3143 | kvm_run->exit_reason = KVM_EXIT_SHUTDOWN; | |
3144 | r = 0; | |
3145 | goto out; | |
3146 | } | |
2f52d58c | 3147 | } |
b93463aa | 3148 | |
b6c7a5dc HB |
3149 | preempt_disable(); |
3150 | ||
3151 | kvm_x86_ops->prepare_guest_switch(vcpu); | |
3152 | kvm_load_guest_fpu(vcpu); | |
3153 | ||
3154 | local_irq_disable(); | |
3155 | ||
d7690175 | 3156 | if (vcpu->requests || need_resched() || signal_pending(current)) { |
6c142801 AK |
3157 | local_irq_enable(); |
3158 | preempt_enable(); | |
3159 | r = 1; | |
3160 | goto out; | |
3161 | } | |
3162 | ||
e9571ed5 MT |
3163 | vcpu->guest_mode = 1; |
3164 | /* | |
3165 | * Make sure that guest_mode assignment won't happen after | |
3166 | * testing the pending IRQ vector bitmap. | |
3167 | */ | |
3168 | smp_wmb(); | |
3169 | ||
ad312c7c | 3170 | if (vcpu->arch.exception.pending) |
298101da AK |
3171 | __queue_exception(vcpu); |
3172 | else if (irqchip_in_kernel(vcpu->kvm)) | |
b6c7a5dc | 3173 | kvm_x86_ops->inject_pending_irq(vcpu); |
eb9774f0 | 3174 | else |
b6c7a5dc HB |
3175 | kvm_x86_ops->inject_pending_vectors(vcpu, kvm_run); |
3176 | ||
b93463aa AK |
3177 | kvm_lapic_sync_to_vapic(vcpu); |
3178 | ||
3200f405 MT |
3179 | up_read(&vcpu->kvm->slots_lock); |
3180 | ||
b6c7a5dc HB |
3181 | kvm_guest_enter(); |
3182 | ||
42dbaa5a JK |
3183 | get_debugreg(vcpu->arch.host_dr6, 6); |
3184 | get_debugreg(vcpu->arch.host_dr7, 7); | |
3185 | if (unlikely(vcpu->arch.switch_db_regs)) { | |
3186 | get_debugreg(vcpu->arch.host_db[0], 0); | |
3187 | get_debugreg(vcpu->arch.host_db[1], 1); | |
3188 | get_debugreg(vcpu->arch.host_db[2], 2); | |
3189 | get_debugreg(vcpu->arch.host_db[3], 3); | |
3190 | ||
3191 | set_debugreg(0, 7); | |
3192 | set_debugreg(vcpu->arch.eff_db[0], 0); | |
3193 | set_debugreg(vcpu->arch.eff_db[1], 1); | |
3194 | set_debugreg(vcpu->arch.eff_db[2], 2); | |
3195 | set_debugreg(vcpu->arch.eff_db[3], 3); | |
3196 | } | |
b6c7a5dc | 3197 | |
2714d1d3 | 3198 | KVMTRACE_0D(VMENTRY, vcpu, entryexit); |
b6c7a5dc HB |
3199 | kvm_x86_ops->run(vcpu, kvm_run); |
3200 | ||
42dbaa5a JK |
3201 | if (unlikely(vcpu->arch.switch_db_regs)) { |
3202 | set_debugreg(0, 7); | |
3203 | set_debugreg(vcpu->arch.host_db[0], 0); | |
3204 | set_debugreg(vcpu->arch.host_db[1], 1); | |
3205 | set_debugreg(vcpu->arch.host_db[2], 2); | |
3206 | set_debugreg(vcpu->arch.host_db[3], 3); | |
3207 | } | |
3208 | set_debugreg(vcpu->arch.host_dr6, 6); | |
3209 | set_debugreg(vcpu->arch.host_dr7, 7); | |
3210 | ||
b6c7a5dc HB |
3211 | vcpu->guest_mode = 0; |
3212 | local_irq_enable(); | |
3213 | ||
3214 | ++vcpu->stat.exits; | |
3215 | ||
3216 | /* | |
3217 | * We must have an instruction between local_irq_enable() and | |
3218 | * kvm_guest_exit(), so the timer interrupt isn't delayed by | |
3219 | * the interrupt shadow. The stat.exits increment will do nicely. | |
3220 | * But we need to prevent reordering, hence this barrier(): | |
3221 | */ | |
3222 | barrier(); | |
3223 | ||
3224 | kvm_guest_exit(); | |
3225 | ||
3226 | preempt_enable(); | |
3227 | ||
3200f405 MT |
3228 | down_read(&vcpu->kvm->slots_lock); |
3229 | ||
b6c7a5dc HB |
3230 | /* |
3231 | * Profile KVM exit RIPs: | |
3232 | */ | |
3233 | if (unlikely(prof_on == KVM_PROFILING)) { | |
5fdbf976 MT |
3234 | unsigned long rip = kvm_rip_read(vcpu); |
3235 | profile_hit(KVM_PROFILING, (void *)rip); | |
b6c7a5dc HB |
3236 | } |
3237 | ||
ad312c7c ZX |
3238 | if (vcpu->arch.exception.pending && kvm_x86_ops->exception_injected(vcpu)) |
3239 | vcpu->arch.exception.pending = false; | |
298101da | 3240 | |
b93463aa AK |
3241 | kvm_lapic_sync_from_vapic(vcpu); |
3242 | ||
b6c7a5dc | 3243 | r = kvm_x86_ops->handle_exit(kvm_run, vcpu); |
d7690175 MT |
3244 | out: |
3245 | return r; | |
3246 | } | |
b6c7a5dc | 3247 | |
09cec754 | 3248 | |
d7690175 MT |
3249 | static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
3250 | { | |
3251 | int r; | |
3252 | ||
3253 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED)) { | |
1b10bf31 JK |
3254 | pr_debug("vcpu %d received sipi with vector # %x\n", |
3255 | vcpu->vcpu_id, vcpu->arch.sipi_vector); | |
d7690175 | 3256 | kvm_lapic_reset(vcpu); |
5f179287 | 3257 | r = kvm_arch_vcpu_reset(vcpu); |
d7690175 MT |
3258 | if (r) |
3259 | return r; | |
3260 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; | |
b6c7a5dc HB |
3261 | } |
3262 | ||
d7690175 MT |
3263 | down_read(&vcpu->kvm->slots_lock); |
3264 | vapic_enter(vcpu); | |
3265 | ||
3266 | r = 1; | |
3267 | while (r > 0) { | |
af2152f5 | 3268 | if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE) |
d7690175 MT |
3269 | r = vcpu_enter_guest(vcpu, kvm_run); |
3270 | else { | |
3271 | up_read(&vcpu->kvm->slots_lock); | |
3272 | kvm_vcpu_block(vcpu); | |
3273 | down_read(&vcpu->kvm->slots_lock); | |
3274 | if (test_and_clear_bit(KVM_REQ_UNHALT, &vcpu->requests)) | |
09cec754 GN |
3275 | { |
3276 | switch(vcpu->arch.mp_state) { | |
3277 | case KVM_MP_STATE_HALTED: | |
d7690175 | 3278 | vcpu->arch.mp_state = |
09cec754 GN |
3279 | KVM_MP_STATE_RUNNABLE; |
3280 | case KVM_MP_STATE_RUNNABLE: | |
3281 | break; | |
3282 | case KVM_MP_STATE_SIPI_RECEIVED: | |
3283 | default: | |
3284 | r = -EINTR; | |
3285 | break; | |
3286 | } | |
3287 | } | |
d7690175 MT |
3288 | } |
3289 | ||
09cec754 GN |
3290 | if (r <= 0) |
3291 | break; | |
3292 | ||
3293 | clear_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests); | |
3294 | if (kvm_cpu_has_pending_timer(vcpu)) | |
3295 | kvm_inject_pending_timer_irqs(vcpu); | |
3296 | ||
3297 | if (dm_request_for_irq_injection(vcpu, kvm_run)) { | |
3298 | r = -EINTR; | |
3299 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
3300 | ++vcpu->stat.request_irq_exits; | |
3301 | } | |
3302 | if (signal_pending(current)) { | |
3303 | r = -EINTR; | |
3304 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
3305 | ++vcpu->stat.signal_exits; | |
3306 | } | |
3307 | if (need_resched()) { | |
3308 | up_read(&vcpu->kvm->slots_lock); | |
3309 | kvm_resched(vcpu); | |
3310 | down_read(&vcpu->kvm->slots_lock); | |
d7690175 | 3311 | } |
b6c7a5dc HB |
3312 | } |
3313 | ||
d7690175 | 3314 | up_read(&vcpu->kvm->slots_lock); |
b6c7a5dc HB |
3315 | post_kvm_run_save(vcpu, kvm_run); |
3316 | ||
b93463aa AK |
3317 | vapic_exit(vcpu); |
3318 | ||
b6c7a5dc HB |
3319 | return r; |
3320 | } | |
3321 | ||
3322 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
3323 | { | |
3324 | int r; | |
3325 | sigset_t sigsaved; | |
3326 | ||
3327 | vcpu_load(vcpu); | |
3328 | ||
ac9f6dc0 AK |
3329 | if (vcpu->sigset_active) |
3330 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
3331 | ||
a4535290 | 3332 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) { |
b6c7a5dc | 3333 | kvm_vcpu_block(vcpu); |
d7690175 | 3334 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); |
ac9f6dc0 AK |
3335 | r = -EAGAIN; |
3336 | goto out; | |
b6c7a5dc HB |
3337 | } |
3338 | ||
b6c7a5dc HB |
3339 | /* re-sync apic's tpr */ |
3340 | if (!irqchip_in_kernel(vcpu->kvm)) | |
2d3ad1f4 | 3341 | kvm_set_cr8(vcpu, kvm_run->cr8); |
b6c7a5dc | 3342 | |
ad312c7c | 3343 | if (vcpu->arch.pio.cur_count) { |
b6c7a5dc HB |
3344 | r = complete_pio(vcpu); |
3345 | if (r) | |
3346 | goto out; | |
3347 | } | |
3348 | #if CONFIG_HAS_IOMEM | |
3349 | if (vcpu->mmio_needed) { | |
3350 | memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8); | |
3351 | vcpu->mmio_read_completed = 1; | |
3352 | vcpu->mmio_needed = 0; | |
3200f405 MT |
3353 | |
3354 | down_read(&vcpu->kvm->slots_lock); | |
b6c7a5dc | 3355 | r = emulate_instruction(vcpu, kvm_run, |
571008da SY |
3356 | vcpu->arch.mmio_fault_cr2, 0, |
3357 | EMULTYPE_NO_DECODE); | |
3200f405 | 3358 | up_read(&vcpu->kvm->slots_lock); |
b6c7a5dc HB |
3359 | if (r == EMULATE_DO_MMIO) { |
3360 | /* | |
3361 | * Read-modify-write. Back to userspace. | |
3362 | */ | |
3363 | r = 0; | |
3364 | goto out; | |
3365 | } | |
3366 | } | |
3367 | #endif | |
5fdbf976 MT |
3368 | if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) |
3369 | kvm_register_write(vcpu, VCPU_REGS_RAX, | |
3370 | kvm_run->hypercall.ret); | |
b6c7a5dc HB |
3371 | |
3372 | r = __vcpu_run(vcpu, kvm_run); | |
3373 | ||
3374 | out: | |
3375 | if (vcpu->sigset_active) | |
3376 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
3377 | ||
3378 | vcpu_put(vcpu); | |
3379 | return r; | |
3380 | } | |
3381 | ||
3382 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
3383 | { | |
3384 | vcpu_load(vcpu); | |
3385 | ||
5fdbf976 MT |
3386 | regs->rax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
3387 | regs->rbx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
3388 | regs->rcx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
3389 | regs->rdx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
3390 | regs->rsi = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
3391 | regs->rdi = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
3392 | regs->rsp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
3393 | regs->rbp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
b6c7a5dc | 3394 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
3395 | regs->r8 = kvm_register_read(vcpu, VCPU_REGS_R8); |
3396 | regs->r9 = kvm_register_read(vcpu, VCPU_REGS_R9); | |
3397 | regs->r10 = kvm_register_read(vcpu, VCPU_REGS_R10); | |
3398 | regs->r11 = kvm_register_read(vcpu, VCPU_REGS_R11); | |
3399 | regs->r12 = kvm_register_read(vcpu, VCPU_REGS_R12); | |
3400 | regs->r13 = kvm_register_read(vcpu, VCPU_REGS_R13); | |
3401 | regs->r14 = kvm_register_read(vcpu, VCPU_REGS_R14); | |
3402 | regs->r15 = kvm_register_read(vcpu, VCPU_REGS_R15); | |
b6c7a5dc HB |
3403 | #endif |
3404 | ||
5fdbf976 | 3405 | regs->rip = kvm_rip_read(vcpu); |
b6c7a5dc HB |
3406 | regs->rflags = kvm_x86_ops->get_rflags(vcpu); |
3407 | ||
3408 | /* | |
3409 | * Don't leak debug flags in case they were set for guest debugging | |
3410 | */ | |
d0bfb940 | 3411 | if (vcpu->guest_debug & KVM_GUESTDBG_SINGLESTEP) |
b6c7a5dc HB |
3412 | regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF); |
3413 | ||
3414 | vcpu_put(vcpu); | |
3415 | ||
3416 | return 0; | |
3417 | } | |
3418 | ||
3419 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
3420 | { | |
3421 | vcpu_load(vcpu); | |
3422 | ||
5fdbf976 MT |
3423 | kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax); |
3424 | kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx); | |
3425 | kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx); | |
3426 | kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx); | |
3427 | kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi); | |
3428 | kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi); | |
3429 | kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp); | |
3430 | kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp); | |
b6c7a5dc | 3431 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
3432 | kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8); |
3433 | kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9); | |
3434 | kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10); | |
3435 | kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11); | |
3436 | kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12); | |
3437 | kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13); | |
3438 | kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14); | |
3439 | kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15); | |
3440 | ||
b6c7a5dc HB |
3441 | #endif |
3442 | ||
5fdbf976 | 3443 | kvm_rip_write(vcpu, regs->rip); |
b6c7a5dc HB |
3444 | kvm_x86_ops->set_rflags(vcpu, regs->rflags); |
3445 | ||
b6c7a5dc | 3446 | |
b4f14abd JK |
3447 | vcpu->arch.exception.pending = false; |
3448 | ||
b6c7a5dc HB |
3449 | vcpu_put(vcpu); |
3450 | ||
3451 | return 0; | |
3452 | } | |
3453 | ||
3e6e0aab GT |
3454 | void kvm_get_segment(struct kvm_vcpu *vcpu, |
3455 | struct kvm_segment *var, int seg) | |
b6c7a5dc | 3456 | { |
14af3f3c | 3457 | kvm_x86_ops->get_segment(vcpu, var, seg); |
b6c7a5dc HB |
3458 | } |
3459 | ||
3460 | void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) | |
3461 | { | |
3462 | struct kvm_segment cs; | |
3463 | ||
3e6e0aab | 3464 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); |
b6c7a5dc HB |
3465 | *db = cs.db; |
3466 | *l = cs.l; | |
3467 | } | |
3468 | EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits); | |
3469 | ||
3470 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
3471 | struct kvm_sregs *sregs) | |
3472 | { | |
3473 | struct descriptor_table dt; | |
3474 | int pending_vec; | |
3475 | ||
3476 | vcpu_load(vcpu); | |
3477 | ||
3e6e0aab GT |
3478 | kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
3479 | kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
3480 | kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
3481 | kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
3482 | kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
3483 | kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 3484 | |
3e6e0aab GT |
3485 | kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
3486 | kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc HB |
3487 | |
3488 | kvm_x86_ops->get_idt(vcpu, &dt); | |
3489 | sregs->idt.limit = dt.limit; | |
3490 | sregs->idt.base = dt.base; | |
3491 | kvm_x86_ops->get_gdt(vcpu, &dt); | |
3492 | sregs->gdt.limit = dt.limit; | |
3493 | sregs->gdt.base = dt.base; | |
3494 | ||
3495 | kvm_x86_ops->decache_cr4_guest_bits(vcpu); | |
ad312c7c ZX |
3496 | sregs->cr0 = vcpu->arch.cr0; |
3497 | sregs->cr2 = vcpu->arch.cr2; | |
3498 | sregs->cr3 = vcpu->arch.cr3; | |
3499 | sregs->cr4 = vcpu->arch.cr4; | |
2d3ad1f4 | 3500 | sregs->cr8 = kvm_get_cr8(vcpu); |
ad312c7c | 3501 | sregs->efer = vcpu->arch.shadow_efer; |
b6c7a5dc HB |
3502 | sregs->apic_base = kvm_get_apic_base(vcpu); |
3503 | ||
3504 | if (irqchip_in_kernel(vcpu->kvm)) { | |
3505 | memset(sregs->interrupt_bitmap, 0, | |
3506 | sizeof sregs->interrupt_bitmap); | |
3507 | pending_vec = kvm_x86_ops->get_irq(vcpu); | |
3508 | if (pending_vec >= 0) | |
3509 | set_bit(pending_vec, | |
3510 | (unsigned long *)sregs->interrupt_bitmap); | |
3511 | } else | |
ad312c7c | 3512 | memcpy(sregs->interrupt_bitmap, vcpu->arch.irq_pending, |
b6c7a5dc HB |
3513 | sizeof sregs->interrupt_bitmap); |
3514 | ||
3515 | vcpu_put(vcpu); | |
3516 | ||
3517 | return 0; | |
3518 | } | |
3519 | ||
62d9f0db MT |
3520 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
3521 | struct kvm_mp_state *mp_state) | |
3522 | { | |
3523 | vcpu_load(vcpu); | |
3524 | mp_state->mp_state = vcpu->arch.mp_state; | |
3525 | vcpu_put(vcpu); | |
3526 | return 0; | |
3527 | } | |
3528 | ||
3529 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
3530 | struct kvm_mp_state *mp_state) | |
3531 | { | |
3532 | vcpu_load(vcpu); | |
3533 | vcpu->arch.mp_state = mp_state->mp_state; | |
3534 | vcpu_put(vcpu); | |
3535 | return 0; | |
3536 | } | |
3537 | ||
3e6e0aab | 3538 | static void kvm_set_segment(struct kvm_vcpu *vcpu, |
b6c7a5dc HB |
3539 | struct kvm_segment *var, int seg) |
3540 | { | |
14af3f3c | 3541 | kvm_x86_ops->set_segment(vcpu, var, seg); |
b6c7a5dc HB |
3542 | } |
3543 | ||
37817f29 IE |
3544 | static void seg_desct_to_kvm_desct(struct desc_struct *seg_desc, u16 selector, |
3545 | struct kvm_segment *kvm_desct) | |
3546 | { | |
3547 | kvm_desct->base = seg_desc->base0; | |
3548 | kvm_desct->base |= seg_desc->base1 << 16; | |
3549 | kvm_desct->base |= seg_desc->base2 << 24; | |
3550 | kvm_desct->limit = seg_desc->limit0; | |
3551 | kvm_desct->limit |= seg_desc->limit << 16; | |
c93cd3a5 MT |
3552 | if (seg_desc->g) { |
3553 | kvm_desct->limit <<= 12; | |
3554 | kvm_desct->limit |= 0xfff; | |
3555 | } | |
37817f29 IE |
3556 | kvm_desct->selector = selector; |
3557 | kvm_desct->type = seg_desc->type; | |
3558 | kvm_desct->present = seg_desc->p; | |
3559 | kvm_desct->dpl = seg_desc->dpl; | |
3560 | kvm_desct->db = seg_desc->d; | |
3561 | kvm_desct->s = seg_desc->s; | |
3562 | kvm_desct->l = seg_desc->l; | |
3563 | kvm_desct->g = seg_desc->g; | |
3564 | kvm_desct->avl = seg_desc->avl; | |
3565 | if (!selector) | |
3566 | kvm_desct->unusable = 1; | |
3567 | else | |
3568 | kvm_desct->unusable = 0; | |
3569 | kvm_desct->padding = 0; | |
3570 | } | |
3571 | ||
b8222ad2 AS |
3572 | static void get_segment_descriptor_dtable(struct kvm_vcpu *vcpu, |
3573 | u16 selector, | |
3574 | struct descriptor_table *dtable) | |
37817f29 IE |
3575 | { |
3576 | if (selector & 1 << 2) { | |
3577 | struct kvm_segment kvm_seg; | |
3578 | ||
3e6e0aab | 3579 | kvm_get_segment(vcpu, &kvm_seg, VCPU_SREG_LDTR); |
37817f29 IE |
3580 | |
3581 | if (kvm_seg.unusable) | |
3582 | dtable->limit = 0; | |
3583 | else | |
3584 | dtable->limit = kvm_seg.limit; | |
3585 | dtable->base = kvm_seg.base; | |
3586 | } | |
3587 | else | |
3588 | kvm_x86_ops->get_gdt(vcpu, dtable); | |
3589 | } | |
3590 | ||
3591 | /* allowed just for 8 bytes segments */ | |
3592 | static int load_guest_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, | |
3593 | struct desc_struct *seg_desc) | |
3594 | { | |
98899aa0 | 3595 | gpa_t gpa; |
37817f29 IE |
3596 | struct descriptor_table dtable; |
3597 | u16 index = selector >> 3; | |
3598 | ||
b8222ad2 | 3599 | get_segment_descriptor_dtable(vcpu, selector, &dtable); |
37817f29 IE |
3600 | |
3601 | if (dtable.limit < index * 8 + 7) { | |
3602 | kvm_queue_exception_e(vcpu, GP_VECTOR, selector & 0xfffc); | |
3603 | return 1; | |
3604 | } | |
98899aa0 MT |
3605 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, dtable.base); |
3606 | gpa += index * 8; | |
3607 | return kvm_read_guest(vcpu->kvm, gpa, seg_desc, 8); | |
37817f29 IE |
3608 | } |
3609 | ||
3610 | /* allowed just for 8 bytes segments */ | |
3611 | static int save_guest_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, | |
3612 | struct desc_struct *seg_desc) | |
3613 | { | |
98899aa0 | 3614 | gpa_t gpa; |
37817f29 IE |
3615 | struct descriptor_table dtable; |
3616 | u16 index = selector >> 3; | |
3617 | ||
b8222ad2 | 3618 | get_segment_descriptor_dtable(vcpu, selector, &dtable); |
37817f29 IE |
3619 | |
3620 | if (dtable.limit < index * 8 + 7) | |
3621 | return 1; | |
98899aa0 MT |
3622 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, dtable.base); |
3623 | gpa += index * 8; | |
3624 | return kvm_write_guest(vcpu->kvm, gpa, seg_desc, 8); | |
37817f29 IE |
3625 | } |
3626 | ||
3627 | static u32 get_tss_base_addr(struct kvm_vcpu *vcpu, | |
3628 | struct desc_struct *seg_desc) | |
3629 | { | |
3630 | u32 base_addr; | |
3631 | ||
3632 | base_addr = seg_desc->base0; | |
3633 | base_addr |= (seg_desc->base1 << 16); | |
3634 | base_addr |= (seg_desc->base2 << 24); | |
3635 | ||
98899aa0 | 3636 | return vcpu->arch.mmu.gva_to_gpa(vcpu, base_addr); |
37817f29 IE |
3637 | } |
3638 | ||
37817f29 IE |
3639 | static u16 get_segment_selector(struct kvm_vcpu *vcpu, int seg) |
3640 | { | |
3641 | struct kvm_segment kvm_seg; | |
3642 | ||
3e6e0aab | 3643 | kvm_get_segment(vcpu, &kvm_seg, seg); |
37817f29 IE |
3644 | return kvm_seg.selector; |
3645 | } | |
3646 | ||
3647 | static int load_segment_descriptor_to_kvm_desct(struct kvm_vcpu *vcpu, | |
3648 | u16 selector, | |
3649 | struct kvm_segment *kvm_seg) | |
3650 | { | |
3651 | struct desc_struct seg_desc; | |
3652 | ||
3653 | if (load_guest_segment_descriptor(vcpu, selector, &seg_desc)) | |
3654 | return 1; | |
3655 | seg_desct_to_kvm_desct(&seg_desc, selector, kvm_seg); | |
3656 | return 0; | |
3657 | } | |
3658 | ||
2259e3a7 | 3659 | static int kvm_load_realmode_segment(struct kvm_vcpu *vcpu, u16 selector, int seg) |
f4bbd9aa AK |
3660 | { |
3661 | struct kvm_segment segvar = { | |
3662 | .base = selector << 4, | |
3663 | .limit = 0xffff, | |
3664 | .selector = selector, | |
3665 | .type = 3, | |
3666 | .present = 1, | |
3667 | .dpl = 3, | |
3668 | .db = 0, | |
3669 | .s = 1, | |
3670 | .l = 0, | |
3671 | .g = 0, | |
3672 | .avl = 0, | |
3673 | .unusable = 0, | |
3674 | }; | |
3675 | kvm_x86_ops->set_segment(vcpu, &segvar, seg); | |
3676 | return 0; | |
3677 | } | |
3678 | ||
3e6e0aab GT |
3679 | int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, |
3680 | int type_bits, int seg) | |
37817f29 IE |
3681 | { |
3682 | struct kvm_segment kvm_seg; | |
3683 | ||
f4bbd9aa AK |
3684 | if (!(vcpu->arch.cr0 & X86_CR0_PE)) |
3685 | return kvm_load_realmode_segment(vcpu, selector, seg); | |
37817f29 IE |
3686 | if (load_segment_descriptor_to_kvm_desct(vcpu, selector, &kvm_seg)) |
3687 | return 1; | |
3688 | kvm_seg.type |= type_bits; | |
3689 | ||
3690 | if (seg != VCPU_SREG_SS && seg != VCPU_SREG_CS && | |
3691 | seg != VCPU_SREG_LDTR) | |
3692 | if (!kvm_seg.s) | |
3693 | kvm_seg.unusable = 1; | |
3694 | ||
3e6e0aab | 3695 | kvm_set_segment(vcpu, &kvm_seg, seg); |
37817f29 IE |
3696 | return 0; |
3697 | } | |
3698 | ||
3699 | static void save_state_to_tss32(struct kvm_vcpu *vcpu, | |
3700 | struct tss_segment_32 *tss) | |
3701 | { | |
3702 | tss->cr3 = vcpu->arch.cr3; | |
5fdbf976 | 3703 | tss->eip = kvm_rip_read(vcpu); |
37817f29 | 3704 | tss->eflags = kvm_x86_ops->get_rflags(vcpu); |
5fdbf976 MT |
3705 | tss->eax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
3706 | tss->ecx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
3707 | tss->edx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
3708 | tss->ebx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
3709 | tss->esp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
3710 | tss->ebp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
3711 | tss->esi = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
3712 | tss->edi = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
37817f29 IE |
3713 | tss->es = get_segment_selector(vcpu, VCPU_SREG_ES); |
3714 | tss->cs = get_segment_selector(vcpu, VCPU_SREG_CS); | |
3715 | tss->ss = get_segment_selector(vcpu, VCPU_SREG_SS); | |
3716 | tss->ds = get_segment_selector(vcpu, VCPU_SREG_DS); | |
3717 | tss->fs = get_segment_selector(vcpu, VCPU_SREG_FS); | |
3718 | tss->gs = get_segment_selector(vcpu, VCPU_SREG_GS); | |
3719 | tss->ldt_selector = get_segment_selector(vcpu, VCPU_SREG_LDTR); | |
3720 | tss->prev_task_link = get_segment_selector(vcpu, VCPU_SREG_TR); | |
3721 | } | |
3722 | ||
3723 | static int load_state_from_tss32(struct kvm_vcpu *vcpu, | |
3724 | struct tss_segment_32 *tss) | |
3725 | { | |
3726 | kvm_set_cr3(vcpu, tss->cr3); | |
3727 | ||
5fdbf976 | 3728 | kvm_rip_write(vcpu, tss->eip); |
37817f29 IE |
3729 | kvm_x86_ops->set_rflags(vcpu, tss->eflags | 2); |
3730 | ||
5fdbf976 MT |
3731 | kvm_register_write(vcpu, VCPU_REGS_RAX, tss->eax); |
3732 | kvm_register_write(vcpu, VCPU_REGS_RCX, tss->ecx); | |
3733 | kvm_register_write(vcpu, VCPU_REGS_RDX, tss->edx); | |
3734 | kvm_register_write(vcpu, VCPU_REGS_RBX, tss->ebx); | |
3735 | kvm_register_write(vcpu, VCPU_REGS_RSP, tss->esp); | |
3736 | kvm_register_write(vcpu, VCPU_REGS_RBP, tss->ebp); | |
3737 | kvm_register_write(vcpu, VCPU_REGS_RSI, tss->esi); | |
3738 | kvm_register_write(vcpu, VCPU_REGS_RDI, tss->edi); | |
37817f29 | 3739 | |
3e6e0aab | 3740 | if (kvm_load_segment_descriptor(vcpu, tss->ldt_selector, 0, VCPU_SREG_LDTR)) |
37817f29 IE |
3741 | return 1; |
3742 | ||
3e6e0aab | 3743 | if (kvm_load_segment_descriptor(vcpu, tss->es, 1, VCPU_SREG_ES)) |
37817f29 IE |
3744 | return 1; |
3745 | ||
3e6e0aab | 3746 | if (kvm_load_segment_descriptor(vcpu, tss->cs, 9, VCPU_SREG_CS)) |
37817f29 IE |
3747 | return 1; |
3748 | ||
3e6e0aab | 3749 | if (kvm_load_segment_descriptor(vcpu, tss->ss, 1, VCPU_SREG_SS)) |
37817f29 IE |
3750 | return 1; |
3751 | ||
3e6e0aab | 3752 | if (kvm_load_segment_descriptor(vcpu, tss->ds, 1, VCPU_SREG_DS)) |
37817f29 IE |
3753 | return 1; |
3754 | ||
3e6e0aab | 3755 | if (kvm_load_segment_descriptor(vcpu, tss->fs, 1, VCPU_SREG_FS)) |
37817f29 IE |
3756 | return 1; |
3757 | ||
3e6e0aab | 3758 | if (kvm_load_segment_descriptor(vcpu, tss->gs, 1, VCPU_SREG_GS)) |
37817f29 IE |
3759 | return 1; |
3760 | return 0; | |
3761 | } | |
3762 | ||
3763 | static void save_state_to_tss16(struct kvm_vcpu *vcpu, | |
3764 | struct tss_segment_16 *tss) | |
3765 | { | |
5fdbf976 | 3766 | tss->ip = kvm_rip_read(vcpu); |
37817f29 | 3767 | tss->flag = kvm_x86_ops->get_rflags(vcpu); |
5fdbf976 MT |
3768 | tss->ax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
3769 | tss->cx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
3770 | tss->dx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
3771 | tss->bx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
3772 | tss->sp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
3773 | tss->bp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
3774 | tss->si = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
3775 | tss->di = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
37817f29 IE |
3776 | |
3777 | tss->es = get_segment_selector(vcpu, VCPU_SREG_ES); | |
3778 | tss->cs = get_segment_selector(vcpu, VCPU_SREG_CS); | |
3779 | tss->ss = get_segment_selector(vcpu, VCPU_SREG_SS); | |
3780 | tss->ds = get_segment_selector(vcpu, VCPU_SREG_DS); | |
3781 | tss->ldt = get_segment_selector(vcpu, VCPU_SREG_LDTR); | |
3782 | tss->prev_task_link = get_segment_selector(vcpu, VCPU_SREG_TR); | |
3783 | } | |
3784 | ||
3785 | static int load_state_from_tss16(struct kvm_vcpu *vcpu, | |
3786 | struct tss_segment_16 *tss) | |
3787 | { | |
5fdbf976 | 3788 | kvm_rip_write(vcpu, tss->ip); |
37817f29 | 3789 | kvm_x86_ops->set_rflags(vcpu, tss->flag | 2); |
5fdbf976 MT |
3790 | kvm_register_write(vcpu, VCPU_REGS_RAX, tss->ax); |
3791 | kvm_register_write(vcpu, VCPU_REGS_RCX, tss->cx); | |
3792 | kvm_register_write(vcpu, VCPU_REGS_RDX, tss->dx); | |
3793 | kvm_register_write(vcpu, VCPU_REGS_RBX, tss->bx); | |
3794 | kvm_register_write(vcpu, VCPU_REGS_RSP, tss->sp); | |
3795 | kvm_register_write(vcpu, VCPU_REGS_RBP, tss->bp); | |
3796 | kvm_register_write(vcpu, VCPU_REGS_RSI, tss->si); | |
3797 | kvm_register_write(vcpu, VCPU_REGS_RDI, tss->di); | |
37817f29 | 3798 | |
3e6e0aab | 3799 | if (kvm_load_segment_descriptor(vcpu, tss->ldt, 0, VCPU_SREG_LDTR)) |
37817f29 IE |
3800 | return 1; |
3801 | ||
3e6e0aab | 3802 | if (kvm_load_segment_descriptor(vcpu, tss->es, 1, VCPU_SREG_ES)) |
37817f29 IE |
3803 | return 1; |
3804 | ||
3e6e0aab | 3805 | if (kvm_load_segment_descriptor(vcpu, tss->cs, 9, VCPU_SREG_CS)) |
37817f29 IE |
3806 | return 1; |
3807 | ||
3e6e0aab | 3808 | if (kvm_load_segment_descriptor(vcpu, tss->ss, 1, VCPU_SREG_SS)) |
37817f29 IE |
3809 | return 1; |
3810 | ||
3e6e0aab | 3811 | if (kvm_load_segment_descriptor(vcpu, tss->ds, 1, VCPU_SREG_DS)) |
37817f29 IE |
3812 | return 1; |
3813 | return 0; | |
3814 | } | |
3815 | ||
8b2cf73c | 3816 | static int kvm_task_switch_16(struct kvm_vcpu *vcpu, u16 tss_selector, |
34198bf8 | 3817 | u32 old_tss_base, |
37817f29 IE |
3818 | struct desc_struct *nseg_desc) |
3819 | { | |
3820 | struct tss_segment_16 tss_segment_16; | |
3821 | int ret = 0; | |
3822 | ||
34198bf8 MT |
3823 | if (kvm_read_guest(vcpu->kvm, old_tss_base, &tss_segment_16, |
3824 | sizeof tss_segment_16)) | |
37817f29 IE |
3825 | goto out; |
3826 | ||
3827 | save_state_to_tss16(vcpu, &tss_segment_16); | |
37817f29 | 3828 | |
34198bf8 MT |
3829 | if (kvm_write_guest(vcpu->kvm, old_tss_base, &tss_segment_16, |
3830 | sizeof tss_segment_16)) | |
37817f29 | 3831 | goto out; |
34198bf8 MT |
3832 | |
3833 | if (kvm_read_guest(vcpu->kvm, get_tss_base_addr(vcpu, nseg_desc), | |
3834 | &tss_segment_16, sizeof tss_segment_16)) | |
3835 | goto out; | |
3836 | ||
37817f29 IE |
3837 | if (load_state_from_tss16(vcpu, &tss_segment_16)) |
3838 | goto out; | |
3839 | ||
3840 | ret = 1; | |
3841 | out: | |
3842 | return ret; | |
3843 | } | |
3844 | ||
8b2cf73c | 3845 | static int kvm_task_switch_32(struct kvm_vcpu *vcpu, u16 tss_selector, |
34198bf8 | 3846 | u32 old_tss_base, |
37817f29 IE |
3847 | struct desc_struct *nseg_desc) |
3848 | { | |
3849 | struct tss_segment_32 tss_segment_32; | |
3850 | int ret = 0; | |
3851 | ||
34198bf8 MT |
3852 | if (kvm_read_guest(vcpu->kvm, old_tss_base, &tss_segment_32, |
3853 | sizeof tss_segment_32)) | |
37817f29 IE |
3854 | goto out; |
3855 | ||
3856 | save_state_to_tss32(vcpu, &tss_segment_32); | |
37817f29 | 3857 | |
34198bf8 MT |
3858 | if (kvm_write_guest(vcpu->kvm, old_tss_base, &tss_segment_32, |
3859 | sizeof tss_segment_32)) | |
3860 | goto out; | |
3861 | ||
3862 | if (kvm_read_guest(vcpu->kvm, get_tss_base_addr(vcpu, nseg_desc), | |
3863 | &tss_segment_32, sizeof tss_segment_32)) | |
37817f29 | 3864 | goto out; |
34198bf8 | 3865 | |
37817f29 IE |
3866 | if (load_state_from_tss32(vcpu, &tss_segment_32)) |
3867 | goto out; | |
3868 | ||
3869 | ret = 1; | |
3870 | out: | |
3871 | return ret; | |
3872 | } | |
3873 | ||
3874 | int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason) | |
3875 | { | |
3876 | struct kvm_segment tr_seg; | |
3877 | struct desc_struct cseg_desc; | |
3878 | struct desc_struct nseg_desc; | |
3879 | int ret = 0; | |
34198bf8 MT |
3880 | u32 old_tss_base = get_segment_base(vcpu, VCPU_SREG_TR); |
3881 | u16 old_tss_sel = get_segment_selector(vcpu, VCPU_SREG_TR); | |
37817f29 | 3882 | |
34198bf8 | 3883 | old_tss_base = vcpu->arch.mmu.gva_to_gpa(vcpu, old_tss_base); |
37817f29 | 3884 | |
34198bf8 MT |
3885 | /* FIXME: Handle errors. Failure to read either TSS or their |
3886 | * descriptors should generate a pagefault. | |
3887 | */ | |
37817f29 IE |
3888 | if (load_guest_segment_descriptor(vcpu, tss_selector, &nseg_desc)) |
3889 | goto out; | |
3890 | ||
34198bf8 | 3891 | if (load_guest_segment_descriptor(vcpu, old_tss_sel, &cseg_desc)) |
37817f29 IE |
3892 | goto out; |
3893 | ||
37817f29 IE |
3894 | if (reason != TASK_SWITCH_IRET) { |
3895 | int cpl; | |
3896 | ||
3897 | cpl = kvm_x86_ops->get_cpl(vcpu); | |
3898 | if ((tss_selector & 3) > nseg_desc.dpl || cpl > nseg_desc.dpl) { | |
3899 | kvm_queue_exception_e(vcpu, GP_VECTOR, 0); | |
3900 | return 1; | |
3901 | } | |
3902 | } | |
3903 | ||
3904 | if (!nseg_desc.p || (nseg_desc.limit0 | nseg_desc.limit << 16) < 0x67) { | |
3905 | kvm_queue_exception_e(vcpu, TS_VECTOR, tss_selector & 0xfffc); | |
3906 | return 1; | |
3907 | } | |
3908 | ||
3909 | if (reason == TASK_SWITCH_IRET || reason == TASK_SWITCH_JMP) { | |
3fe913e7 | 3910 | cseg_desc.type &= ~(1 << 1); //clear the B flag |
34198bf8 | 3911 | save_guest_segment_descriptor(vcpu, old_tss_sel, &cseg_desc); |
37817f29 IE |
3912 | } |
3913 | ||
3914 | if (reason == TASK_SWITCH_IRET) { | |
3915 | u32 eflags = kvm_x86_ops->get_rflags(vcpu); | |
3916 | kvm_x86_ops->set_rflags(vcpu, eflags & ~X86_EFLAGS_NT); | |
3917 | } | |
3918 | ||
3919 | kvm_x86_ops->skip_emulated_instruction(vcpu); | |
37817f29 IE |
3920 | |
3921 | if (nseg_desc.type & 8) | |
34198bf8 | 3922 | ret = kvm_task_switch_32(vcpu, tss_selector, old_tss_base, |
37817f29 IE |
3923 | &nseg_desc); |
3924 | else | |
34198bf8 | 3925 | ret = kvm_task_switch_16(vcpu, tss_selector, old_tss_base, |
37817f29 IE |
3926 | &nseg_desc); |
3927 | ||
3928 | if (reason == TASK_SWITCH_CALL || reason == TASK_SWITCH_GATE) { | |
3929 | u32 eflags = kvm_x86_ops->get_rflags(vcpu); | |
3930 | kvm_x86_ops->set_rflags(vcpu, eflags | X86_EFLAGS_NT); | |
3931 | } | |
3932 | ||
3933 | if (reason != TASK_SWITCH_IRET) { | |
3fe913e7 | 3934 | nseg_desc.type |= (1 << 1); |
37817f29 IE |
3935 | save_guest_segment_descriptor(vcpu, tss_selector, |
3936 | &nseg_desc); | |
3937 | } | |
3938 | ||
3939 | kvm_x86_ops->set_cr0(vcpu, vcpu->arch.cr0 | X86_CR0_TS); | |
3940 | seg_desct_to_kvm_desct(&nseg_desc, tss_selector, &tr_seg); | |
3941 | tr_seg.type = 11; | |
3e6e0aab | 3942 | kvm_set_segment(vcpu, &tr_seg, VCPU_SREG_TR); |
37817f29 | 3943 | out: |
37817f29 IE |
3944 | return ret; |
3945 | } | |
3946 | EXPORT_SYMBOL_GPL(kvm_task_switch); | |
3947 | ||
b6c7a5dc HB |
3948 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
3949 | struct kvm_sregs *sregs) | |
3950 | { | |
3951 | int mmu_reset_needed = 0; | |
3952 | int i, pending_vec, max_bits; | |
3953 | struct descriptor_table dt; | |
3954 | ||
3955 | vcpu_load(vcpu); | |
3956 | ||
3957 | dt.limit = sregs->idt.limit; | |
3958 | dt.base = sregs->idt.base; | |
3959 | kvm_x86_ops->set_idt(vcpu, &dt); | |
3960 | dt.limit = sregs->gdt.limit; | |
3961 | dt.base = sregs->gdt.base; | |
3962 | kvm_x86_ops->set_gdt(vcpu, &dt); | |
3963 | ||
ad312c7c ZX |
3964 | vcpu->arch.cr2 = sregs->cr2; |
3965 | mmu_reset_needed |= vcpu->arch.cr3 != sregs->cr3; | |
3966 | vcpu->arch.cr3 = sregs->cr3; | |
b6c7a5dc | 3967 | |
2d3ad1f4 | 3968 | kvm_set_cr8(vcpu, sregs->cr8); |
b6c7a5dc | 3969 | |
ad312c7c | 3970 | mmu_reset_needed |= vcpu->arch.shadow_efer != sregs->efer; |
b6c7a5dc | 3971 | kvm_x86_ops->set_efer(vcpu, sregs->efer); |
b6c7a5dc HB |
3972 | kvm_set_apic_base(vcpu, sregs->apic_base); |
3973 | ||
3974 | kvm_x86_ops->decache_cr4_guest_bits(vcpu); | |
3975 | ||
ad312c7c | 3976 | mmu_reset_needed |= vcpu->arch.cr0 != sregs->cr0; |
b6c7a5dc | 3977 | kvm_x86_ops->set_cr0(vcpu, sregs->cr0); |
d7306163 | 3978 | vcpu->arch.cr0 = sregs->cr0; |
b6c7a5dc | 3979 | |
ad312c7c | 3980 | mmu_reset_needed |= vcpu->arch.cr4 != sregs->cr4; |
b6c7a5dc HB |
3981 | kvm_x86_ops->set_cr4(vcpu, sregs->cr4); |
3982 | if (!is_long_mode(vcpu) && is_pae(vcpu)) | |
ad312c7c | 3983 | load_pdptrs(vcpu, vcpu->arch.cr3); |
b6c7a5dc HB |
3984 | |
3985 | if (mmu_reset_needed) | |
3986 | kvm_mmu_reset_context(vcpu); | |
3987 | ||
3988 | if (!irqchip_in_kernel(vcpu->kvm)) { | |
ad312c7c ZX |
3989 | memcpy(vcpu->arch.irq_pending, sregs->interrupt_bitmap, |
3990 | sizeof vcpu->arch.irq_pending); | |
3991 | vcpu->arch.irq_summary = 0; | |
3992 | for (i = 0; i < ARRAY_SIZE(vcpu->arch.irq_pending); ++i) | |
3993 | if (vcpu->arch.irq_pending[i]) | |
3994 | __set_bit(i, &vcpu->arch.irq_summary); | |
b6c7a5dc HB |
3995 | } else { |
3996 | max_bits = (sizeof sregs->interrupt_bitmap) << 3; | |
3997 | pending_vec = find_first_bit( | |
3998 | (const unsigned long *)sregs->interrupt_bitmap, | |
3999 | max_bits); | |
4000 | /* Only pending external irq is handled here */ | |
4001 | if (pending_vec < max_bits) { | |
4002 | kvm_x86_ops->set_irq(vcpu, pending_vec); | |
4003 | pr_debug("Set back pending irq %d\n", | |
4004 | pending_vec); | |
4005 | } | |
e4825800 | 4006 | kvm_pic_clear_isr_ack(vcpu->kvm); |
b6c7a5dc HB |
4007 | } |
4008 | ||
3e6e0aab GT |
4009 | kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
4010 | kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
4011 | kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
4012 | kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
4013 | kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
4014 | kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 4015 | |
3e6e0aab GT |
4016 | kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
4017 | kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc | 4018 | |
9c3e4aab MT |
4019 | /* Older userspace won't unhalt the vcpu on reset. */ |
4020 | if (vcpu->vcpu_id == 0 && kvm_rip_read(vcpu) == 0xfff0 && | |
4021 | sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 && | |
4022 | !(vcpu->arch.cr0 & X86_CR0_PE)) | |
4023 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; | |
4024 | ||
b6c7a5dc HB |
4025 | vcpu_put(vcpu); |
4026 | ||
4027 | return 0; | |
4028 | } | |
4029 | ||
d0bfb940 JK |
4030 | int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu, |
4031 | struct kvm_guest_debug *dbg) | |
b6c7a5dc | 4032 | { |
ae675ef0 | 4033 | int i, r; |
b6c7a5dc HB |
4034 | |
4035 | vcpu_load(vcpu); | |
4036 | ||
ae675ef0 JK |
4037 | if ((dbg->control & (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP)) == |
4038 | (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_HW_BP)) { | |
4039 | for (i = 0; i < KVM_NR_DB_REGS; ++i) | |
4040 | vcpu->arch.eff_db[i] = dbg->arch.debugreg[i]; | |
4041 | vcpu->arch.switch_db_regs = | |
4042 | (dbg->arch.debugreg[7] & DR7_BP_EN_MASK); | |
4043 | } else { | |
4044 | for (i = 0; i < KVM_NR_DB_REGS; i++) | |
4045 | vcpu->arch.eff_db[i] = vcpu->arch.db[i]; | |
4046 | vcpu->arch.switch_db_regs = (vcpu->arch.dr7 & DR7_BP_EN_MASK); | |
4047 | } | |
4048 | ||
b6c7a5dc HB |
4049 | r = kvm_x86_ops->set_guest_debug(vcpu, dbg); |
4050 | ||
d0bfb940 JK |
4051 | if (dbg->control & KVM_GUESTDBG_INJECT_DB) |
4052 | kvm_queue_exception(vcpu, DB_VECTOR); | |
4053 | else if (dbg->control & KVM_GUESTDBG_INJECT_BP) | |
4054 | kvm_queue_exception(vcpu, BP_VECTOR); | |
4055 | ||
b6c7a5dc HB |
4056 | vcpu_put(vcpu); |
4057 | ||
4058 | return r; | |
4059 | } | |
4060 | ||
d0752060 HB |
4061 | /* |
4062 | * fxsave fpu state. Taken from x86_64/processor.h. To be killed when | |
4063 | * we have asm/x86/processor.h | |
4064 | */ | |
4065 | struct fxsave { | |
4066 | u16 cwd; | |
4067 | u16 swd; | |
4068 | u16 twd; | |
4069 | u16 fop; | |
4070 | u64 rip; | |
4071 | u64 rdp; | |
4072 | u32 mxcsr; | |
4073 | u32 mxcsr_mask; | |
4074 | u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */ | |
4075 | #ifdef CONFIG_X86_64 | |
4076 | u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */ | |
4077 | #else | |
4078 | u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */ | |
4079 | #endif | |
4080 | }; | |
4081 | ||
8b006791 ZX |
4082 | /* |
4083 | * Translate a guest virtual address to a guest physical address. | |
4084 | */ | |
4085 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
4086 | struct kvm_translation *tr) | |
4087 | { | |
4088 | unsigned long vaddr = tr->linear_address; | |
4089 | gpa_t gpa; | |
4090 | ||
4091 | vcpu_load(vcpu); | |
72dc67a6 | 4092 | down_read(&vcpu->kvm->slots_lock); |
ad312c7c | 4093 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, vaddr); |
72dc67a6 | 4094 | up_read(&vcpu->kvm->slots_lock); |
8b006791 ZX |
4095 | tr->physical_address = gpa; |
4096 | tr->valid = gpa != UNMAPPED_GVA; | |
4097 | tr->writeable = 1; | |
4098 | tr->usermode = 0; | |
8b006791 ZX |
4099 | vcpu_put(vcpu); |
4100 | ||
4101 | return 0; | |
4102 | } | |
4103 | ||
d0752060 HB |
4104 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
4105 | { | |
ad312c7c | 4106 | struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image; |
d0752060 HB |
4107 | |
4108 | vcpu_load(vcpu); | |
4109 | ||
4110 | memcpy(fpu->fpr, fxsave->st_space, 128); | |
4111 | fpu->fcw = fxsave->cwd; | |
4112 | fpu->fsw = fxsave->swd; | |
4113 | fpu->ftwx = fxsave->twd; | |
4114 | fpu->last_opcode = fxsave->fop; | |
4115 | fpu->last_ip = fxsave->rip; | |
4116 | fpu->last_dp = fxsave->rdp; | |
4117 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space); | |
4118 | ||
4119 | vcpu_put(vcpu); | |
4120 | ||
4121 | return 0; | |
4122 | } | |
4123 | ||
4124 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
4125 | { | |
ad312c7c | 4126 | struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image; |
d0752060 HB |
4127 | |
4128 | vcpu_load(vcpu); | |
4129 | ||
4130 | memcpy(fxsave->st_space, fpu->fpr, 128); | |
4131 | fxsave->cwd = fpu->fcw; | |
4132 | fxsave->swd = fpu->fsw; | |
4133 | fxsave->twd = fpu->ftwx; | |
4134 | fxsave->fop = fpu->last_opcode; | |
4135 | fxsave->rip = fpu->last_ip; | |
4136 | fxsave->rdp = fpu->last_dp; | |
4137 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space); | |
4138 | ||
4139 | vcpu_put(vcpu); | |
4140 | ||
4141 | return 0; | |
4142 | } | |
4143 | ||
4144 | void fx_init(struct kvm_vcpu *vcpu) | |
4145 | { | |
4146 | unsigned after_mxcsr_mask; | |
4147 | ||
bc1a34f1 AA |
4148 | /* |
4149 | * Touch the fpu the first time in non atomic context as if | |
4150 | * this is the first fpu instruction the exception handler | |
4151 | * will fire before the instruction returns and it'll have to | |
4152 | * allocate ram with GFP_KERNEL. | |
4153 | */ | |
4154 | if (!used_math()) | |
d6e88aec | 4155 | kvm_fx_save(&vcpu->arch.host_fx_image); |
bc1a34f1 | 4156 | |
d0752060 HB |
4157 | /* Initialize guest FPU by resetting ours and saving into guest's */ |
4158 | preempt_disable(); | |
d6e88aec AK |
4159 | kvm_fx_save(&vcpu->arch.host_fx_image); |
4160 | kvm_fx_finit(); | |
4161 | kvm_fx_save(&vcpu->arch.guest_fx_image); | |
4162 | kvm_fx_restore(&vcpu->arch.host_fx_image); | |
d0752060 HB |
4163 | preempt_enable(); |
4164 | ||
ad312c7c | 4165 | vcpu->arch.cr0 |= X86_CR0_ET; |
d0752060 | 4166 | after_mxcsr_mask = offsetof(struct i387_fxsave_struct, st_space); |
ad312c7c ZX |
4167 | vcpu->arch.guest_fx_image.mxcsr = 0x1f80; |
4168 | memset((void *)&vcpu->arch.guest_fx_image + after_mxcsr_mask, | |
d0752060 HB |
4169 | 0, sizeof(struct i387_fxsave_struct) - after_mxcsr_mask); |
4170 | } | |
4171 | EXPORT_SYMBOL_GPL(fx_init); | |
4172 | ||
4173 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) | |
4174 | { | |
4175 | if (!vcpu->fpu_active || vcpu->guest_fpu_loaded) | |
4176 | return; | |
4177 | ||
4178 | vcpu->guest_fpu_loaded = 1; | |
d6e88aec AK |
4179 | kvm_fx_save(&vcpu->arch.host_fx_image); |
4180 | kvm_fx_restore(&vcpu->arch.guest_fx_image); | |
d0752060 HB |
4181 | } |
4182 | EXPORT_SYMBOL_GPL(kvm_load_guest_fpu); | |
4183 | ||
4184 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) | |
4185 | { | |
4186 | if (!vcpu->guest_fpu_loaded) | |
4187 | return; | |
4188 | ||
4189 | vcpu->guest_fpu_loaded = 0; | |
d6e88aec AK |
4190 | kvm_fx_save(&vcpu->arch.guest_fx_image); |
4191 | kvm_fx_restore(&vcpu->arch.host_fx_image); | |
f096ed85 | 4192 | ++vcpu->stat.fpu_reload; |
d0752060 HB |
4193 | } |
4194 | EXPORT_SYMBOL_GPL(kvm_put_guest_fpu); | |
e9b11c17 ZX |
4195 | |
4196 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
4197 | { | |
7f1ea208 JR |
4198 | if (vcpu->arch.time_page) { |
4199 | kvm_release_page_dirty(vcpu->arch.time_page); | |
4200 | vcpu->arch.time_page = NULL; | |
4201 | } | |
4202 | ||
e9b11c17 ZX |
4203 | kvm_x86_ops->vcpu_free(vcpu); |
4204 | } | |
4205 | ||
4206 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
4207 | unsigned int id) | |
4208 | { | |
26e5215f AK |
4209 | return kvm_x86_ops->vcpu_create(kvm, id); |
4210 | } | |
e9b11c17 | 4211 | |
26e5215f AK |
4212 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
4213 | { | |
4214 | int r; | |
e9b11c17 ZX |
4215 | |
4216 | /* We do fxsave: this must be aligned. */ | |
ad312c7c | 4217 | BUG_ON((unsigned long)&vcpu->arch.host_fx_image & 0xF); |
e9b11c17 | 4218 | |
0bed3b56 | 4219 | vcpu->arch.mtrr_state.have_fixed = 1; |
e9b11c17 ZX |
4220 | vcpu_load(vcpu); |
4221 | r = kvm_arch_vcpu_reset(vcpu); | |
4222 | if (r == 0) | |
4223 | r = kvm_mmu_setup(vcpu); | |
4224 | vcpu_put(vcpu); | |
4225 | if (r < 0) | |
4226 | goto free_vcpu; | |
4227 | ||
26e5215f | 4228 | return 0; |
e9b11c17 ZX |
4229 | free_vcpu: |
4230 | kvm_x86_ops->vcpu_free(vcpu); | |
26e5215f | 4231 | return r; |
e9b11c17 ZX |
4232 | } |
4233 | ||
d40ccc62 | 4234 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
e9b11c17 ZX |
4235 | { |
4236 | vcpu_load(vcpu); | |
4237 | kvm_mmu_unload(vcpu); | |
4238 | vcpu_put(vcpu); | |
4239 | ||
4240 | kvm_x86_ops->vcpu_free(vcpu); | |
4241 | } | |
4242 | ||
4243 | int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu) | |
4244 | { | |
448fa4a9 JK |
4245 | vcpu->arch.nmi_pending = false; |
4246 | vcpu->arch.nmi_injected = false; | |
4247 | ||
42dbaa5a JK |
4248 | vcpu->arch.switch_db_regs = 0; |
4249 | memset(vcpu->arch.db, 0, sizeof(vcpu->arch.db)); | |
4250 | vcpu->arch.dr6 = DR6_FIXED_1; | |
4251 | vcpu->arch.dr7 = DR7_FIXED_1; | |
4252 | ||
e9b11c17 ZX |
4253 | return kvm_x86_ops->vcpu_reset(vcpu); |
4254 | } | |
4255 | ||
4256 | void kvm_arch_hardware_enable(void *garbage) | |
4257 | { | |
4258 | kvm_x86_ops->hardware_enable(garbage); | |
4259 | } | |
4260 | ||
4261 | void kvm_arch_hardware_disable(void *garbage) | |
4262 | { | |
4263 | kvm_x86_ops->hardware_disable(garbage); | |
4264 | } | |
4265 | ||
4266 | int kvm_arch_hardware_setup(void) | |
4267 | { | |
4268 | return kvm_x86_ops->hardware_setup(); | |
4269 | } | |
4270 | ||
4271 | void kvm_arch_hardware_unsetup(void) | |
4272 | { | |
4273 | kvm_x86_ops->hardware_unsetup(); | |
4274 | } | |
4275 | ||
4276 | void kvm_arch_check_processor_compat(void *rtn) | |
4277 | { | |
4278 | kvm_x86_ops->check_processor_compatibility(rtn); | |
4279 | } | |
4280 | ||
4281 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
4282 | { | |
4283 | struct page *page; | |
4284 | struct kvm *kvm; | |
4285 | int r; | |
4286 | ||
4287 | BUG_ON(vcpu->kvm == NULL); | |
4288 | kvm = vcpu->kvm; | |
4289 | ||
ad312c7c | 4290 | vcpu->arch.mmu.root_hpa = INVALID_PAGE; |
e9b11c17 | 4291 | if (!irqchip_in_kernel(kvm) || vcpu->vcpu_id == 0) |
a4535290 | 4292 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
e9b11c17 | 4293 | else |
a4535290 | 4294 | vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED; |
e9b11c17 ZX |
4295 | |
4296 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
4297 | if (!page) { | |
4298 | r = -ENOMEM; | |
4299 | goto fail; | |
4300 | } | |
ad312c7c | 4301 | vcpu->arch.pio_data = page_address(page); |
e9b11c17 ZX |
4302 | |
4303 | r = kvm_mmu_create(vcpu); | |
4304 | if (r < 0) | |
4305 | goto fail_free_pio_data; | |
4306 | ||
4307 | if (irqchip_in_kernel(kvm)) { | |
4308 | r = kvm_create_lapic(vcpu); | |
4309 | if (r < 0) | |
4310 | goto fail_mmu_destroy; | |
4311 | } | |
4312 | ||
4313 | return 0; | |
4314 | ||
4315 | fail_mmu_destroy: | |
4316 | kvm_mmu_destroy(vcpu); | |
4317 | fail_free_pio_data: | |
ad312c7c | 4318 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 ZX |
4319 | fail: |
4320 | return r; | |
4321 | } | |
4322 | ||
4323 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
4324 | { | |
4325 | kvm_free_lapic(vcpu); | |
3200f405 | 4326 | down_read(&vcpu->kvm->slots_lock); |
e9b11c17 | 4327 | kvm_mmu_destroy(vcpu); |
3200f405 | 4328 | up_read(&vcpu->kvm->slots_lock); |
ad312c7c | 4329 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 | 4330 | } |
d19a9cd2 ZX |
4331 | |
4332 | struct kvm *kvm_arch_create_vm(void) | |
4333 | { | |
4334 | struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); | |
4335 | ||
4336 | if (!kvm) | |
4337 | return ERR_PTR(-ENOMEM); | |
4338 | ||
f05e70ac | 4339 | INIT_LIST_HEAD(&kvm->arch.active_mmu_pages); |
6cffe8ca | 4340 | INIT_LIST_HEAD(&kvm->arch.oos_global_pages); |
4d5c5d0f | 4341 | INIT_LIST_HEAD(&kvm->arch.assigned_dev_head); |
d19a9cd2 | 4342 | |
5550af4d SY |
4343 | /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */ |
4344 | set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap); | |
4345 | ||
53f658b3 MT |
4346 | rdtscll(kvm->arch.vm_init_tsc); |
4347 | ||
d19a9cd2 ZX |
4348 | return kvm; |
4349 | } | |
4350 | ||
4351 | static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu) | |
4352 | { | |
4353 | vcpu_load(vcpu); | |
4354 | kvm_mmu_unload(vcpu); | |
4355 | vcpu_put(vcpu); | |
4356 | } | |
4357 | ||
4358 | static void kvm_free_vcpus(struct kvm *kvm) | |
4359 | { | |
4360 | unsigned int i; | |
4361 | ||
4362 | /* | |
4363 | * Unpin any mmu pages first. | |
4364 | */ | |
4365 | for (i = 0; i < KVM_MAX_VCPUS; ++i) | |
4366 | if (kvm->vcpus[i]) | |
4367 | kvm_unload_vcpu_mmu(kvm->vcpus[i]); | |
4368 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
4369 | if (kvm->vcpus[i]) { | |
4370 | kvm_arch_vcpu_free(kvm->vcpus[i]); | |
4371 | kvm->vcpus[i] = NULL; | |
4372 | } | |
4373 | } | |
4374 | ||
4375 | } | |
4376 | ||
ad8ba2cd SY |
4377 | void kvm_arch_sync_events(struct kvm *kvm) |
4378 | { | |
ba4cef31 | 4379 | kvm_free_all_assigned_devices(kvm); |
ad8ba2cd SY |
4380 | } |
4381 | ||
d19a9cd2 ZX |
4382 | void kvm_arch_destroy_vm(struct kvm *kvm) |
4383 | { | |
6eb55818 | 4384 | kvm_iommu_unmap_guest(kvm); |
7837699f | 4385 | kvm_free_pit(kvm); |
d7deeeb0 ZX |
4386 | kfree(kvm->arch.vpic); |
4387 | kfree(kvm->arch.vioapic); | |
d19a9cd2 ZX |
4388 | kvm_free_vcpus(kvm); |
4389 | kvm_free_physmem(kvm); | |
3d45830c AK |
4390 | if (kvm->arch.apic_access_page) |
4391 | put_page(kvm->arch.apic_access_page); | |
b7ebfb05 SY |
4392 | if (kvm->arch.ept_identity_pagetable) |
4393 | put_page(kvm->arch.ept_identity_pagetable); | |
d19a9cd2 ZX |
4394 | kfree(kvm); |
4395 | } | |
0de10343 ZX |
4396 | |
4397 | int kvm_arch_set_memory_region(struct kvm *kvm, | |
4398 | struct kvm_userspace_memory_region *mem, | |
4399 | struct kvm_memory_slot old, | |
4400 | int user_alloc) | |
4401 | { | |
4402 | int npages = mem->memory_size >> PAGE_SHIFT; | |
4403 | struct kvm_memory_slot *memslot = &kvm->memslots[mem->slot]; | |
4404 | ||
4405 | /*To keep backward compatibility with older userspace, | |
4406 | *x86 needs to hanlde !user_alloc case. | |
4407 | */ | |
4408 | if (!user_alloc) { | |
4409 | if (npages && !old.rmap) { | |
604b38ac AA |
4410 | unsigned long userspace_addr; |
4411 | ||
72dc67a6 | 4412 | down_write(¤t->mm->mmap_sem); |
604b38ac AA |
4413 | userspace_addr = do_mmap(NULL, 0, |
4414 | npages * PAGE_SIZE, | |
4415 | PROT_READ | PROT_WRITE, | |
acee3c04 | 4416 | MAP_PRIVATE | MAP_ANONYMOUS, |
604b38ac | 4417 | 0); |
72dc67a6 | 4418 | up_write(¤t->mm->mmap_sem); |
0de10343 | 4419 | |
604b38ac AA |
4420 | if (IS_ERR((void *)userspace_addr)) |
4421 | return PTR_ERR((void *)userspace_addr); | |
4422 | ||
4423 | /* set userspace_addr atomically for kvm_hva_to_rmapp */ | |
4424 | spin_lock(&kvm->mmu_lock); | |
4425 | memslot->userspace_addr = userspace_addr; | |
4426 | spin_unlock(&kvm->mmu_lock); | |
0de10343 ZX |
4427 | } else { |
4428 | if (!old.user_alloc && old.rmap) { | |
4429 | int ret; | |
4430 | ||
72dc67a6 | 4431 | down_write(¤t->mm->mmap_sem); |
0de10343 ZX |
4432 | ret = do_munmap(current->mm, old.userspace_addr, |
4433 | old.npages * PAGE_SIZE); | |
72dc67a6 | 4434 | up_write(¤t->mm->mmap_sem); |
0de10343 ZX |
4435 | if (ret < 0) |
4436 | printk(KERN_WARNING | |
4437 | "kvm_vm_ioctl_set_memory_region: " | |
4438 | "failed to munmap memory\n"); | |
4439 | } | |
4440 | } | |
4441 | } | |
4442 | ||
f05e70ac | 4443 | if (!kvm->arch.n_requested_mmu_pages) { |
0de10343 ZX |
4444 | unsigned int nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm); |
4445 | kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages); | |
4446 | } | |
4447 | ||
4448 | kvm_mmu_slot_remove_write_access(kvm, mem->slot); | |
4449 | kvm_flush_remote_tlbs(kvm); | |
4450 | ||
4451 | return 0; | |
4452 | } | |
1d737c8a | 4453 | |
34d4cb8f MT |
4454 | void kvm_arch_flush_shadow(struct kvm *kvm) |
4455 | { | |
4456 | kvm_mmu_zap_all(kvm); | |
4457 | } | |
4458 | ||
1d737c8a ZX |
4459 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
4460 | { | |
a4535290 | 4461 | return vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE |
0496fbb9 JK |
4462 | || vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED |
4463 | || vcpu->arch.nmi_pending; | |
1d737c8a | 4464 | } |
5736199a ZX |
4465 | |
4466 | static void vcpu_kick_intr(void *info) | |
4467 | { | |
4468 | #ifdef DEBUG | |
4469 | struct kvm_vcpu *vcpu = (struct kvm_vcpu *)info; | |
4470 | printk(KERN_DEBUG "vcpu_kick_intr %p \n", vcpu); | |
4471 | #endif | |
4472 | } | |
4473 | ||
4474 | void kvm_vcpu_kick(struct kvm_vcpu *vcpu) | |
4475 | { | |
4476 | int ipi_pcpu = vcpu->cpu; | |
e9571ed5 | 4477 | int cpu = get_cpu(); |
5736199a ZX |
4478 | |
4479 | if (waitqueue_active(&vcpu->wq)) { | |
4480 | wake_up_interruptible(&vcpu->wq); | |
4481 | ++vcpu->stat.halt_wakeup; | |
4482 | } | |
e9571ed5 MT |
4483 | /* |
4484 | * We may be called synchronously with irqs disabled in guest mode, | |
4485 | * So need not to call smp_call_function_single() in that case. | |
4486 | */ | |
4487 | if (vcpu->guest_mode && vcpu->cpu != cpu) | |
8691e5a8 | 4488 | smp_call_function_single(ipi_pcpu, vcpu_kick_intr, vcpu, 0); |
e9571ed5 | 4489 | put_cpu(); |
5736199a | 4490 | } |
78646121 GN |
4491 | |
4492 | int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu) | |
4493 | { | |
4494 | return kvm_x86_ops->interrupt_allowed(vcpu); | |
4495 | } |