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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> |
043405e1 CO |
39 | |
40 | #include <asm/uaccess.h> | |
d825ed0a | 41 | #include <asm/msr.h> |
a5f61300 | 42 | #include <asm/desc.h> |
0bed3b56 | 43 | #include <asm/mtrr.h> |
043405e1 | 44 | |
313a3dc7 | 45 | #define MAX_IO_MSRS 256 |
a03490ed CO |
46 | #define CR0_RESERVED_BITS \ |
47 | (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \ | |
48 | | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \ | |
49 | | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG)) | |
50 | #define CR4_RESERVED_BITS \ | |
51 | (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\ | |
52 | | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \ | |
53 | | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \ | |
54 | | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE)) | |
55 | ||
56 | #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR) | |
50a37eb4 JR |
57 | /* EFER defaults: |
58 | * - enable syscall per default because its emulated by KVM | |
59 | * - enable LME and LMA per default on 64 bit KVM | |
60 | */ | |
61 | #ifdef CONFIG_X86_64 | |
62 | static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffafeULL; | |
63 | #else | |
64 | static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffffeULL; | |
65 | #endif | |
313a3dc7 | 66 | |
ba1389b7 AK |
67 | #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM |
68 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU | |
417bc304 | 69 | |
674eea0f AK |
70 | static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, |
71 | struct kvm_cpuid_entry2 __user *entries); | |
72 | ||
97896d04 | 73 | struct kvm_x86_ops *kvm_x86_ops; |
5fdbf976 | 74 | EXPORT_SYMBOL_GPL(kvm_x86_ops); |
97896d04 | 75 | |
417bc304 | 76 | struct kvm_stats_debugfs_item debugfs_entries[] = { |
ba1389b7 AK |
77 | { "pf_fixed", VCPU_STAT(pf_fixed) }, |
78 | { "pf_guest", VCPU_STAT(pf_guest) }, | |
79 | { "tlb_flush", VCPU_STAT(tlb_flush) }, | |
80 | { "invlpg", VCPU_STAT(invlpg) }, | |
81 | { "exits", VCPU_STAT(exits) }, | |
82 | { "io_exits", VCPU_STAT(io_exits) }, | |
83 | { "mmio_exits", VCPU_STAT(mmio_exits) }, | |
84 | { "signal_exits", VCPU_STAT(signal_exits) }, | |
85 | { "irq_window", VCPU_STAT(irq_window_exits) }, | |
f08864b4 | 86 | { "nmi_window", VCPU_STAT(nmi_window_exits) }, |
ba1389b7 AK |
87 | { "halt_exits", VCPU_STAT(halt_exits) }, |
88 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, | |
f11c3a8d | 89 | { "hypercalls", VCPU_STAT(hypercalls) }, |
ba1389b7 | 90 | { "request_irq", VCPU_STAT(request_irq_exits) }, |
c4abb7c9 | 91 | { "request_nmi", VCPU_STAT(request_nmi_exits) }, |
ba1389b7 AK |
92 | { "irq_exits", VCPU_STAT(irq_exits) }, |
93 | { "host_state_reload", VCPU_STAT(host_state_reload) }, | |
94 | { "efer_reload", VCPU_STAT(efer_reload) }, | |
95 | { "fpu_reload", VCPU_STAT(fpu_reload) }, | |
96 | { "insn_emulation", VCPU_STAT(insn_emulation) }, | |
97 | { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) }, | |
fa89a817 | 98 | { "irq_injections", VCPU_STAT(irq_injections) }, |
c4abb7c9 | 99 | { "nmi_injections", VCPU_STAT(nmi_injections) }, |
4cee5764 AK |
100 | { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) }, |
101 | { "mmu_pte_write", VM_STAT(mmu_pte_write) }, | |
102 | { "mmu_pte_updated", VM_STAT(mmu_pte_updated) }, | |
103 | { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) }, | |
104 | { "mmu_flooded", VM_STAT(mmu_flooded) }, | |
105 | { "mmu_recycled", VM_STAT(mmu_recycled) }, | |
dfc5aa00 | 106 | { "mmu_cache_miss", VM_STAT(mmu_cache_miss) }, |
4731d4c7 | 107 | { "mmu_unsync", VM_STAT(mmu_unsync) }, |
6cffe8ca | 108 | { "mmu_unsync_global", VM_STAT(mmu_unsync_global) }, |
0f74a24c | 109 | { "remote_tlb_flush", VM_STAT(remote_tlb_flush) }, |
05da4558 | 110 | { "largepages", VM_STAT(lpages) }, |
417bc304 HB |
111 | { NULL } |
112 | }; | |
113 | ||
5fb76f9b CO |
114 | unsigned long segment_base(u16 selector) |
115 | { | |
116 | struct descriptor_table gdt; | |
a5f61300 | 117 | struct desc_struct *d; |
5fb76f9b CO |
118 | unsigned long table_base; |
119 | unsigned long v; | |
120 | ||
121 | if (selector == 0) | |
122 | return 0; | |
123 | ||
124 | asm("sgdt %0" : "=m"(gdt)); | |
125 | table_base = gdt.base; | |
126 | ||
127 | if (selector & 4) { /* from ldt */ | |
128 | u16 ldt_selector; | |
129 | ||
130 | asm("sldt %0" : "=g"(ldt_selector)); | |
131 | table_base = segment_base(ldt_selector); | |
132 | } | |
a5f61300 AK |
133 | d = (struct desc_struct *)(table_base + (selector & ~7)); |
134 | v = d->base0 | ((unsigned long)d->base1 << 16) | | |
135 | ((unsigned long)d->base2 << 24); | |
5fb76f9b | 136 | #ifdef CONFIG_X86_64 |
a5f61300 AK |
137 | if (d->s == 0 && (d->type == 2 || d->type == 9 || d->type == 11)) |
138 | v |= ((unsigned long)((struct ldttss_desc64 *)d)->base3) << 32; | |
5fb76f9b CO |
139 | #endif |
140 | return v; | |
141 | } | |
142 | EXPORT_SYMBOL_GPL(segment_base); | |
143 | ||
6866b83e CO |
144 | u64 kvm_get_apic_base(struct kvm_vcpu *vcpu) |
145 | { | |
146 | if (irqchip_in_kernel(vcpu->kvm)) | |
ad312c7c | 147 | return vcpu->arch.apic_base; |
6866b83e | 148 | else |
ad312c7c | 149 | return vcpu->arch.apic_base; |
6866b83e CO |
150 | } |
151 | EXPORT_SYMBOL_GPL(kvm_get_apic_base); | |
152 | ||
153 | void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data) | |
154 | { | |
155 | /* TODO: reserve bits check */ | |
156 | if (irqchip_in_kernel(vcpu->kvm)) | |
157 | kvm_lapic_set_base(vcpu, data); | |
158 | else | |
ad312c7c | 159 | vcpu->arch.apic_base = data; |
6866b83e CO |
160 | } |
161 | EXPORT_SYMBOL_GPL(kvm_set_apic_base); | |
162 | ||
298101da AK |
163 | void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
164 | { | |
ad312c7c ZX |
165 | WARN_ON(vcpu->arch.exception.pending); |
166 | vcpu->arch.exception.pending = true; | |
167 | vcpu->arch.exception.has_error_code = false; | |
168 | vcpu->arch.exception.nr = nr; | |
298101da AK |
169 | } |
170 | EXPORT_SYMBOL_GPL(kvm_queue_exception); | |
171 | ||
c3c91fee AK |
172 | void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long addr, |
173 | u32 error_code) | |
174 | { | |
175 | ++vcpu->stat.pf_guest; | |
71c4dfaf JR |
176 | if (vcpu->arch.exception.pending) { |
177 | if (vcpu->arch.exception.nr == PF_VECTOR) { | |
178 | printk(KERN_DEBUG "kvm: inject_page_fault:" | |
179 | " double fault 0x%lx\n", addr); | |
180 | vcpu->arch.exception.nr = DF_VECTOR; | |
181 | vcpu->arch.exception.error_code = 0; | |
182 | } else if (vcpu->arch.exception.nr == DF_VECTOR) { | |
183 | /* triple fault -> shutdown */ | |
184 | set_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests); | |
185 | } | |
c3c91fee AK |
186 | return; |
187 | } | |
ad312c7c | 188 | vcpu->arch.cr2 = addr; |
c3c91fee AK |
189 | kvm_queue_exception_e(vcpu, PF_VECTOR, error_code); |
190 | } | |
191 | ||
3419ffc8 SY |
192 | void kvm_inject_nmi(struct kvm_vcpu *vcpu) |
193 | { | |
194 | vcpu->arch.nmi_pending = 1; | |
195 | } | |
196 | EXPORT_SYMBOL_GPL(kvm_inject_nmi); | |
197 | ||
298101da AK |
198 | void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
199 | { | |
ad312c7c ZX |
200 | WARN_ON(vcpu->arch.exception.pending); |
201 | vcpu->arch.exception.pending = true; | |
202 | vcpu->arch.exception.has_error_code = true; | |
203 | vcpu->arch.exception.nr = nr; | |
204 | vcpu->arch.exception.error_code = error_code; | |
298101da AK |
205 | } |
206 | EXPORT_SYMBOL_GPL(kvm_queue_exception_e); | |
207 | ||
208 | static void __queue_exception(struct kvm_vcpu *vcpu) | |
209 | { | |
ad312c7c ZX |
210 | kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr, |
211 | vcpu->arch.exception.has_error_code, | |
212 | vcpu->arch.exception.error_code); | |
298101da AK |
213 | } |
214 | ||
a03490ed CO |
215 | /* |
216 | * Load the pae pdptrs. Return true is they are all valid. | |
217 | */ | |
218 | int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3) | |
219 | { | |
220 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; | |
221 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; | |
222 | int i; | |
223 | int ret; | |
ad312c7c | 224 | u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)]; |
a03490ed | 225 | |
a03490ed CO |
226 | ret = kvm_read_guest_page(vcpu->kvm, pdpt_gfn, pdpte, |
227 | offset * sizeof(u64), sizeof(pdpte)); | |
228 | if (ret < 0) { | |
229 | ret = 0; | |
230 | goto out; | |
231 | } | |
232 | for (i = 0; i < ARRAY_SIZE(pdpte); ++i) { | |
233 | if ((pdpte[i] & 1) && (pdpte[i] & 0xfffffff0000001e6ull)) { | |
234 | ret = 0; | |
235 | goto out; | |
236 | } | |
237 | } | |
238 | ret = 1; | |
239 | ||
ad312c7c | 240 | memcpy(vcpu->arch.pdptrs, pdpte, sizeof(vcpu->arch.pdptrs)); |
a03490ed | 241 | out: |
a03490ed CO |
242 | |
243 | return ret; | |
244 | } | |
cc4b6871 | 245 | EXPORT_SYMBOL_GPL(load_pdptrs); |
a03490ed | 246 | |
d835dfec AK |
247 | static bool pdptrs_changed(struct kvm_vcpu *vcpu) |
248 | { | |
ad312c7c | 249 | u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)]; |
d835dfec AK |
250 | bool changed = true; |
251 | int r; | |
252 | ||
253 | if (is_long_mode(vcpu) || !is_pae(vcpu)) | |
254 | return false; | |
255 | ||
ad312c7c | 256 | r = kvm_read_guest(vcpu->kvm, vcpu->arch.cr3 & ~31u, pdpte, sizeof(pdpte)); |
d835dfec AK |
257 | if (r < 0) |
258 | goto out; | |
ad312c7c | 259 | changed = memcmp(pdpte, vcpu->arch.pdptrs, sizeof(pdpte)) != 0; |
d835dfec | 260 | out: |
d835dfec AK |
261 | |
262 | return changed; | |
263 | } | |
264 | ||
2d3ad1f4 | 265 | void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
a03490ed CO |
266 | { |
267 | if (cr0 & CR0_RESERVED_BITS) { | |
268 | printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n", | |
ad312c7c | 269 | cr0, vcpu->arch.cr0); |
c1a5d4f9 | 270 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
271 | return; |
272 | } | |
273 | ||
274 | if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) { | |
275 | printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n"); | |
c1a5d4f9 | 276 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
277 | return; |
278 | } | |
279 | ||
280 | if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) { | |
281 | printk(KERN_DEBUG "set_cr0: #GP, set PG flag " | |
282 | "and a clear PE flag\n"); | |
c1a5d4f9 | 283 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
284 | return; |
285 | } | |
286 | ||
287 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { | |
288 | #ifdef CONFIG_X86_64 | |
ad312c7c | 289 | if ((vcpu->arch.shadow_efer & EFER_LME)) { |
a03490ed CO |
290 | int cs_db, cs_l; |
291 | ||
292 | if (!is_pae(vcpu)) { | |
293 | printk(KERN_DEBUG "set_cr0: #GP, start paging " | |
294 | "in long mode while PAE is disabled\n"); | |
c1a5d4f9 | 295 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
296 | return; |
297 | } | |
298 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
299 | if (cs_l) { | |
300 | printk(KERN_DEBUG "set_cr0: #GP, start paging " | |
301 | "in long mode while CS.L == 1\n"); | |
c1a5d4f9 | 302 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
303 | return; |
304 | ||
305 | } | |
306 | } else | |
307 | #endif | |
ad312c7c | 308 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.cr3)) { |
a03490ed CO |
309 | printk(KERN_DEBUG "set_cr0: #GP, pdptrs " |
310 | "reserved bits\n"); | |
c1a5d4f9 | 311 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
312 | return; |
313 | } | |
314 | ||
315 | } | |
316 | ||
317 | kvm_x86_ops->set_cr0(vcpu, cr0); | |
ad312c7c | 318 | vcpu->arch.cr0 = cr0; |
a03490ed | 319 | |
6cffe8ca | 320 | kvm_mmu_sync_global(vcpu); |
a03490ed | 321 | kvm_mmu_reset_context(vcpu); |
a03490ed CO |
322 | return; |
323 | } | |
2d3ad1f4 | 324 | EXPORT_SYMBOL_GPL(kvm_set_cr0); |
a03490ed | 325 | |
2d3ad1f4 | 326 | void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw) |
a03490ed | 327 | { |
2d3ad1f4 | 328 | kvm_set_cr0(vcpu, (vcpu->arch.cr0 & ~0x0ful) | (msw & 0x0f)); |
2714d1d3 FEL |
329 | KVMTRACE_1D(LMSW, vcpu, |
330 | (u32)((vcpu->arch.cr0 & ~0x0ful) | (msw & 0x0f)), | |
331 | handler); | |
a03490ed | 332 | } |
2d3ad1f4 | 333 | EXPORT_SYMBOL_GPL(kvm_lmsw); |
a03490ed | 334 | |
2d3ad1f4 | 335 | void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
a03490ed CO |
336 | { |
337 | if (cr4 & CR4_RESERVED_BITS) { | |
338 | printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n"); | |
c1a5d4f9 | 339 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
340 | return; |
341 | } | |
342 | ||
343 | if (is_long_mode(vcpu)) { | |
344 | if (!(cr4 & X86_CR4_PAE)) { | |
345 | printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while " | |
346 | "in long mode\n"); | |
c1a5d4f9 | 347 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
348 | return; |
349 | } | |
350 | } else if (is_paging(vcpu) && !is_pae(vcpu) && (cr4 & X86_CR4_PAE) | |
ad312c7c | 351 | && !load_pdptrs(vcpu, vcpu->arch.cr3)) { |
a03490ed | 352 | printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n"); |
c1a5d4f9 | 353 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
354 | return; |
355 | } | |
356 | ||
357 | if (cr4 & X86_CR4_VMXE) { | |
358 | printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n"); | |
c1a5d4f9 | 359 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
360 | return; |
361 | } | |
362 | kvm_x86_ops->set_cr4(vcpu, cr4); | |
ad312c7c | 363 | vcpu->arch.cr4 = cr4; |
6cffe8ca | 364 | kvm_mmu_sync_global(vcpu); |
a03490ed | 365 | kvm_mmu_reset_context(vcpu); |
a03490ed | 366 | } |
2d3ad1f4 | 367 | EXPORT_SYMBOL_GPL(kvm_set_cr4); |
a03490ed | 368 | |
2d3ad1f4 | 369 | void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
a03490ed | 370 | { |
ad312c7c | 371 | if (cr3 == vcpu->arch.cr3 && !pdptrs_changed(vcpu)) { |
0ba73cda | 372 | kvm_mmu_sync_roots(vcpu); |
d835dfec AK |
373 | kvm_mmu_flush_tlb(vcpu); |
374 | return; | |
375 | } | |
376 | ||
a03490ed CO |
377 | if (is_long_mode(vcpu)) { |
378 | if (cr3 & CR3_L_MODE_RESERVED_BITS) { | |
379 | printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n"); | |
c1a5d4f9 | 380 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
381 | return; |
382 | } | |
383 | } else { | |
384 | if (is_pae(vcpu)) { | |
385 | if (cr3 & CR3_PAE_RESERVED_BITS) { | |
386 | printk(KERN_DEBUG | |
387 | "set_cr3: #GP, reserved bits\n"); | |
c1a5d4f9 | 388 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
389 | return; |
390 | } | |
391 | if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) { | |
392 | printk(KERN_DEBUG "set_cr3: #GP, pdptrs " | |
393 | "reserved bits\n"); | |
c1a5d4f9 | 394 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
395 | return; |
396 | } | |
397 | } | |
398 | /* | |
399 | * We don't check reserved bits in nonpae mode, because | |
400 | * this isn't enforced, and VMware depends on this. | |
401 | */ | |
402 | } | |
403 | ||
a03490ed CO |
404 | /* |
405 | * Does the new cr3 value map to physical memory? (Note, we | |
406 | * catch an invalid cr3 even in real-mode, because it would | |
407 | * cause trouble later on when we turn on paging anyway.) | |
408 | * | |
409 | * A real CPU would silently accept an invalid cr3 and would | |
410 | * attempt to use it - with largely undefined (and often hard | |
411 | * to debug) behavior on the guest side. | |
412 | */ | |
413 | if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT))) | |
c1a5d4f9 | 414 | kvm_inject_gp(vcpu, 0); |
a03490ed | 415 | else { |
ad312c7c ZX |
416 | vcpu->arch.cr3 = cr3; |
417 | vcpu->arch.mmu.new_cr3(vcpu); | |
a03490ed | 418 | } |
a03490ed | 419 | } |
2d3ad1f4 | 420 | EXPORT_SYMBOL_GPL(kvm_set_cr3); |
a03490ed | 421 | |
2d3ad1f4 | 422 | void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) |
a03490ed CO |
423 | { |
424 | if (cr8 & CR8_RESERVED_BITS) { | |
425 | printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8); | |
c1a5d4f9 | 426 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
427 | return; |
428 | } | |
429 | if (irqchip_in_kernel(vcpu->kvm)) | |
430 | kvm_lapic_set_tpr(vcpu, cr8); | |
431 | else | |
ad312c7c | 432 | vcpu->arch.cr8 = cr8; |
a03490ed | 433 | } |
2d3ad1f4 | 434 | EXPORT_SYMBOL_GPL(kvm_set_cr8); |
a03490ed | 435 | |
2d3ad1f4 | 436 | unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu) |
a03490ed CO |
437 | { |
438 | if (irqchip_in_kernel(vcpu->kvm)) | |
439 | return kvm_lapic_get_cr8(vcpu); | |
440 | else | |
ad312c7c | 441 | return vcpu->arch.cr8; |
a03490ed | 442 | } |
2d3ad1f4 | 443 | EXPORT_SYMBOL_GPL(kvm_get_cr8); |
a03490ed | 444 | |
043405e1 CO |
445 | /* |
446 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS | |
447 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. | |
448 | * | |
449 | * This list is modified at module load time to reflect the | |
450 | * capabilities of the host cpu. | |
451 | */ | |
452 | static u32 msrs_to_save[] = { | |
453 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, | |
454 | MSR_K6_STAR, | |
455 | #ifdef CONFIG_X86_64 | |
456 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, | |
457 | #endif | |
18068523 | 458 | MSR_IA32_TIME_STAMP_COUNTER, MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK, |
468d472f | 459 | MSR_IA32_PERF_STATUS, MSR_IA32_CR_PAT |
043405e1 CO |
460 | }; |
461 | ||
462 | static unsigned num_msrs_to_save; | |
463 | ||
464 | static u32 emulated_msrs[] = { | |
465 | MSR_IA32_MISC_ENABLE, | |
466 | }; | |
467 | ||
15c4a640 CO |
468 | static void set_efer(struct kvm_vcpu *vcpu, u64 efer) |
469 | { | |
f2b4b7dd | 470 | if (efer & efer_reserved_bits) { |
15c4a640 CO |
471 | printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n", |
472 | efer); | |
c1a5d4f9 | 473 | kvm_inject_gp(vcpu, 0); |
15c4a640 CO |
474 | return; |
475 | } | |
476 | ||
477 | if (is_paging(vcpu) | |
ad312c7c | 478 | && (vcpu->arch.shadow_efer & EFER_LME) != (efer & EFER_LME)) { |
15c4a640 | 479 | printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n"); |
c1a5d4f9 | 480 | kvm_inject_gp(vcpu, 0); |
15c4a640 CO |
481 | return; |
482 | } | |
483 | ||
484 | kvm_x86_ops->set_efer(vcpu, efer); | |
485 | ||
486 | efer &= ~EFER_LMA; | |
ad312c7c | 487 | efer |= vcpu->arch.shadow_efer & EFER_LMA; |
15c4a640 | 488 | |
ad312c7c | 489 | vcpu->arch.shadow_efer = efer; |
15c4a640 CO |
490 | } |
491 | ||
f2b4b7dd JR |
492 | void kvm_enable_efer_bits(u64 mask) |
493 | { | |
494 | efer_reserved_bits &= ~mask; | |
495 | } | |
496 | EXPORT_SYMBOL_GPL(kvm_enable_efer_bits); | |
497 | ||
498 | ||
15c4a640 CO |
499 | /* |
500 | * Writes msr value into into the appropriate "register". | |
501 | * Returns 0 on success, non-0 otherwise. | |
502 | * Assumes vcpu_load() was already called. | |
503 | */ | |
504 | int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) | |
505 | { | |
506 | return kvm_x86_ops->set_msr(vcpu, msr_index, data); | |
507 | } | |
508 | ||
313a3dc7 CO |
509 | /* |
510 | * Adapt set_msr() to msr_io()'s calling convention | |
511 | */ | |
512 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) | |
513 | { | |
514 | return kvm_set_msr(vcpu, index, *data); | |
515 | } | |
516 | ||
18068523 GOC |
517 | static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock) |
518 | { | |
519 | static int version; | |
50d0a0f9 GH |
520 | struct pvclock_wall_clock wc; |
521 | struct timespec now, sys, boot; | |
18068523 GOC |
522 | |
523 | if (!wall_clock) | |
524 | return; | |
525 | ||
526 | version++; | |
527 | ||
18068523 GOC |
528 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); |
529 | ||
50d0a0f9 GH |
530 | /* |
531 | * The guest calculates current wall clock time by adding | |
532 | * system time (updated by kvm_write_guest_time below) to the | |
533 | * wall clock specified here. guest system time equals host | |
534 | * system time for us, thus we must fill in host boot time here. | |
535 | */ | |
536 | now = current_kernel_time(); | |
537 | ktime_get_ts(&sys); | |
538 | boot = ns_to_timespec(timespec_to_ns(&now) - timespec_to_ns(&sys)); | |
539 | ||
540 | wc.sec = boot.tv_sec; | |
541 | wc.nsec = boot.tv_nsec; | |
542 | wc.version = version; | |
18068523 GOC |
543 | |
544 | kvm_write_guest(kvm, wall_clock, &wc, sizeof(wc)); | |
545 | ||
546 | version++; | |
547 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); | |
18068523 GOC |
548 | } |
549 | ||
50d0a0f9 GH |
550 | static uint32_t div_frac(uint32_t dividend, uint32_t divisor) |
551 | { | |
552 | uint32_t quotient, remainder; | |
553 | ||
554 | /* Don't try to replace with do_div(), this one calculates | |
555 | * "(dividend << 32) / divisor" */ | |
556 | __asm__ ( "divl %4" | |
557 | : "=a" (quotient), "=d" (remainder) | |
558 | : "0" (0), "1" (dividend), "r" (divisor) ); | |
559 | return quotient; | |
560 | } | |
561 | ||
562 | static void kvm_set_time_scale(uint32_t tsc_khz, struct pvclock_vcpu_time_info *hv_clock) | |
563 | { | |
564 | uint64_t nsecs = 1000000000LL; | |
565 | int32_t shift = 0; | |
566 | uint64_t tps64; | |
567 | uint32_t tps32; | |
568 | ||
569 | tps64 = tsc_khz * 1000LL; | |
570 | while (tps64 > nsecs*2) { | |
571 | tps64 >>= 1; | |
572 | shift--; | |
573 | } | |
574 | ||
575 | tps32 = (uint32_t)tps64; | |
576 | while (tps32 <= (uint32_t)nsecs) { | |
577 | tps32 <<= 1; | |
578 | shift++; | |
579 | } | |
580 | ||
581 | hv_clock->tsc_shift = shift; | |
582 | hv_clock->tsc_to_system_mul = div_frac(nsecs, tps32); | |
583 | ||
584 | pr_debug("%s: tsc_khz %u, tsc_shift %d, tsc_mul %u\n", | |
80a914dc | 585 | __func__, tsc_khz, hv_clock->tsc_shift, |
50d0a0f9 GH |
586 | hv_clock->tsc_to_system_mul); |
587 | } | |
588 | ||
18068523 GOC |
589 | static void kvm_write_guest_time(struct kvm_vcpu *v) |
590 | { | |
591 | struct timespec ts; | |
592 | unsigned long flags; | |
593 | struct kvm_vcpu_arch *vcpu = &v->arch; | |
594 | void *shared_kaddr; | |
595 | ||
596 | if ((!vcpu->time_page)) | |
597 | return; | |
598 | ||
50d0a0f9 GH |
599 | if (unlikely(vcpu->hv_clock_tsc_khz != tsc_khz)) { |
600 | kvm_set_time_scale(tsc_khz, &vcpu->hv_clock); | |
601 | vcpu->hv_clock_tsc_khz = tsc_khz; | |
602 | } | |
603 | ||
18068523 GOC |
604 | /* Keep irq disabled to prevent changes to the clock */ |
605 | local_irq_save(flags); | |
606 | kvm_get_msr(v, MSR_IA32_TIME_STAMP_COUNTER, | |
607 | &vcpu->hv_clock.tsc_timestamp); | |
608 | ktime_get_ts(&ts); | |
609 | local_irq_restore(flags); | |
610 | ||
611 | /* With all the info we got, fill in the values */ | |
612 | ||
613 | vcpu->hv_clock.system_time = ts.tv_nsec + | |
614 | (NSEC_PER_SEC * (u64)ts.tv_sec); | |
615 | /* | |
616 | * The interface expects us to write an even number signaling that the | |
617 | * update is finished. Since the guest won't see the intermediate | |
50d0a0f9 | 618 | * state, we just increase by 2 at the end. |
18068523 | 619 | */ |
50d0a0f9 | 620 | vcpu->hv_clock.version += 2; |
18068523 GOC |
621 | |
622 | shared_kaddr = kmap_atomic(vcpu->time_page, KM_USER0); | |
623 | ||
624 | memcpy(shared_kaddr + vcpu->time_offset, &vcpu->hv_clock, | |
50d0a0f9 | 625 | sizeof(vcpu->hv_clock)); |
18068523 GOC |
626 | |
627 | kunmap_atomic(shared_kaddr, KM_USER0); | |
628 | ||
629 | mark_page_dirty(v->kvm, vcpu->time >> PAGE_SHIFT); | |
630 | } | |
631 | ||
9ba075a6 AK |
632 | static bool msr_mtrr_valid(unsigned msr) |
633 | { | |
634 | switch (msr) { | |
635 | case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR - 1: | |
636 | case MSR_MTRRfix64K_00000: | |
637 | case MSR_MTRRfix16K_80000: | |
638 | case MSR_MTRRfix16K_A0000: | |
639 | case MSR_MTRRfix4K_C0000: | |
640 | case MSR_MTRRfix4K_C8000: | |
641 | case MSR_MTRRfix4K_D0000: | |
642 | case MSR_MTRRfix4K_D8000: | |
643 | case MSR_MTRRfix4K_E0000: | |
644 | case MSR_MTRRfix4K_E8000: | |
645 | case MSR_MTRRfix4K_F0000: | |
646 | case MSR_MTRRfix4K_F8000: | |
647 | case MSR_MTRRdefType: | |
648 | case MSR_IA32_CR_PAT: | |
649 | return true; | |
650 | case 0x2f8: | |
651 | return true; | |
652 | } | |
653 | return false; | |
654 | } | |
655 | ||
656 | static int set_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
657 | { | |
0bed3b56 SY |
658 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
659 | ||
9ba075a6 AK |
660 | if (!msr_mtrr_valid(msr)) |
661 | return 1; | |
662 | ||
0bed3b56 SY |
663 | if (msr == MSR_MTRRdefType) { |
664 | vcpu->arch.mtrr_state.def_type = data; | |
665 | vcpu->arch.mtrr_state.enabled = (data & 0xc00) >> 10; | |
666 | } else if (msr == MSR_MTRRfix64K_00000) | |
667 | p[0] = data; | |
668 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) | |
669 | p[1 + msr - MSR_MTRRfix16K_80000] = data; | |
670 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) | |
671 | p[3 + msr - MSR_MTRRfix4K_C0000] = data; | |
672 | else if (msr == MSR_IA32_CR_PAT) | |
673 | vcpu->arch.pat = data; | |
674 | else { /* Variable MTRRs */ | |
675 | int idx, is_mtrr_mask; | |
676 | u64 *pt; | |
677 | ||
678 | idx = (msr - 0x200) / 2; | |
679 | is_mtrr_mask = msr - 0x200 - 2 * idx; | |
680 | if (!is_mtrr_mask) | |
681 | pt = | |
682 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; | |
683 | else | |
684 | pt = | |
685 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; | |
686 | *pt = data; | |
687 | } | |
688 | ||
689 | kvm_mmu_reset_context(vcpu); | |
9ba075a6 AK |
690 | return 0; |
691 | } | |
15c4a640 CO |
692 | |
693 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
694 | { | |
695 | switch (msr) { | |
15c4a640 CO |
696 | case MSR_EFER: |
697 | set_efer(vcpu, data); | |
698 | break; | |
15c4a640 CO |
699 | case MSR_IA32_MC0_STATUS: |
700 | pr_unimpl(vcpu, "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n", | |
b8688d51 | 701 | __func__, data); |
15c4a640 CO |
702 | break; |
703 | case MSR_IA32_MCG_STATUS: | |
704 | pr_unimpl(vcpu, "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n", | |
b8688d51 | 705 | __func__, data); |
15c4a640 | 706 | break; |
c7ac679c JR |
707 | case MSR_IA32_MCG_CTL: |
708 | pr_unimpl(vcpu, "%s: MSR_IA32_MCG_CTL 0x%llx, nop\n", | |
b8688d51 | 709 | __func__, data); |
c7ac679c | 710 | break; |
b5e2fec0 AG |
711 | case MSR_IA32_DEBUGCTLMSR: |
712 | if (!data) { | |
713 | /* We support the non-activated case already */ | |
714 | break; | |
715 | } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) { | |
716 | /* Values other than LBR and BTF are vendor-specific, | |
717 | thus reserved and should throw a #GP */ | |
718 | return 1; | |
719 | } | |
720 | pr_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n", | |
721 | __func__, data); | |
722 | break; | |
15c4a640 CO |
723 | case MSR_IA32_UCODE_REV: |
724 | case MSR_IA32_UCODE_WRITE: | |
15c4a640 | 725 | break; |
9ba075a6 AK |
726 | case 0x200 ... 0x2ff: |
727 | return set_msr_mtrr(vcpu, msr, data); | |
15c4a640 CO |
728 | case MSR_IA32_APICBASE: |
729 | kvm_set_apic_base(vcpu, data); | |
730 | break; | |
731 | case MSR_IA32_MISC_ENABLE: | |
ad312c7c | 732 | vcpu->arch.ia32_misc_enable_msr = data; |
15c4a640 | 733 | break; |
18068523 GOC |
734 | case MSR_KVM_WALL_CLOCK: |
735 | vcpu->kvm->arch.wall_clock = data; | |
736 | kvm_write_wall_clock(vcpu->kvm, data); | |
737 | break; | |
738 | case MSR_KVM_SYSTEM_TIME: { | |
739 | if (vcpu->arch.time_page) { | |
740 | kvm_release_page_dirty(vcpu->arch.time_page); | |
741 | vcpu->arch.time_page = NULL; | |
742 | } | |
743 | ||
744 | vcpu->arch.time = data; | |
745 | ||
746 | /* we verify if the enable bit is set... */ | |
747 | if (!(data & 1)) | |
748 | break; | |
749 | ||
750 | /* ...but clean it before doing the actual write */ | |
751 | vcpu->arch.time_offset = data & ~(PAGE_MASK | 1); | |
752 | ||
18068523 GOC |
753 | vcpu->arch.time_page = |
754 | gfn_to_page(vcpu->kvm, data >> PAGE_SHIFT); | |
18068523 GOC |
755 | |
756 | if (is_error_page(vcpu->arch.time_page)) { | |
757 | kvm_release_page_clean(vcpu->arch.time_page); | |
758 | vcpu->arch.time_page = NULL; | |
759 | } | |
760 | ||
761 | kvm_write_guest_time(vcpu); | |
762 | break; | |
763 | } | |
15c4a640 | 764 | default: |
565f1fbd | 765 | pr_unimpl(vcpu, "unhandled wrmsr: 0x%x data %llx\n", msr, data); |
15c4a640 CO |
766 | return 1; |
767 | } | |
768 | return 0; | |
769 | } | |
770 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); | |
771 | ||
772 | ||
773 | /* | |
774 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
775 | * Returns 0 on success, non-0 otherwise. | |
776 | * Assumes vcpu_load() was already called. | |
777 | */ | |
778 | int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) | |
779 | { | |
780 | return kvm_x86_ops->get_msr(vcpu, msr_index, pdata); | |
781 | } | |
782 | ||
9ba075a6 AK |
783 | static int get_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
784 | { | |
0bed3b56 SY |
785 | u64 *p = (u64 *)&vcpu->arch.mtrr_state.fixed_ranges; |
786 | ||
9ba075a6 AK |
787 | if (!msr_mtrr_valid(msr)) |
788 | return 1; | |
789 | ||
0bed3b56 SY |
790 | if (msr == MSR_MTRRdefType) |
791 | *pdata = vcpu->arch.mtrr_state.def_type + | |
792 | (vcpu->arch.mtrr_state.enabled << 10); | |
793 | else if (msr == MSR_MTRRfix64K_00000) | |
794 | *pdata = p[0]; | |
795 | else if (msr == MSR_MTRRfix16K_80000 || msr == MSR_MTRRfix16K_A0000) | |
796 | *pdata = p[1 + msr - MSR_MTRRfix16K_80000]; | |
797 | else if (msr >= MSR_MTRRfix4K_C0000 && msr <= MSR_MTRRfix4K_F8000) | |
798 | *pdata = p[3 + msr - MSR_MTRRfix4K_C0000]; | |
799 | else if (msr == MSR_IA32_CR_PAT) | |
800 | *pdata = vcpu->arch.pat; | |
801 | else { /* Variable MTRRs */ | |
802 | int idx, is_mtrr_mask; | |
803 | u64 *pt; | |
804 | ||
805 | idx = (msr - 0x200) / 2; | |
806 | is_mtrr_mask = msr - 0x200 - 2 * idx; | |
807 | if (!is_mtrr_mask) | |
808 | pt = | |
809 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].base_lo; | |
810 | else | |
811 | pt = | |
812 | (u64 *)&vcpu->arch.mtrr_state.var_ranges[idx].mask_lo; | |
813 | *pdata = *pt; | |
814 | } | |
815 | ||
9ba075a6 AK |
816 | return 0; |
817 | } | |
818 | ||
15c4a640 CO |
819 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
820 | { | |
821 | u64 data; | |
822 | ||
823 | switch (msr) { | |
824 | case 0xc0010010: /* SYSCFG */ | |
825 | case 0xc0010015: /* HWCR */ | |
826 | case MSR_IA32_PLATFORM_ID: | |
827 | case MSR_IA32_P5_MC_ADDR: | |
828 | case MSR_IA32_P5_MC_TYPE: | |
829 | case MSR_IA32_MC0_CTL: | |
830 | case MSR_IA32_MCG_STATUS: | |
831 | case MSR_IA32_MCG_CAP: | |
c7ac679c | 832 | case MSR_IA32_MCG_CTL: |
15c4a640 CO |
833 | case MSR_IA32_MC0_MISC: |
834 | case MSR_IA32_MC0_MISC+4: | |
835 | case MSR_IA32_MC0_MISC+8: | |
836 | case MSR_IA32_MC0_MISC+12: | |
837 | case MSR_IA32_MC0_MISC+16: | |
a89c1ad2 | 838 | case MSR_IA32_MC0_MISC+20: |
15c4a640 | 839 | case MSR_IA32_UCODE_REV: |
15c4a640 | 840 | case MSR_IA32_EBL_CR_POWERON: |
b5e2fec0 AG |
841 | case MSR_IA32_DEBUGCTLMSR: |
842 | case MSR_IA32_LASTBRANCHFROMIP: | |
843 | case MSR_IA32_LASTBRANCHTOIP: | |
844 | case MSR_IA32_LASTINTFROMIP: | |
845 | case MSR_IA32_LASTINTTOIP: | |
15c4a640 CO |
846 | data = 0; |
847 | break; | |
9ba075a6 AK |
848 | case MSR_MTRRcap: |
849 | data = 0x500 | KVM_NR_VAR_MTRR; | |
850 | break; | |
851 | case 0x200 ... 0x2ff: | |
852 | return get_msr_mtrr(vcpu, msr, pdata); | |
15c4a640 CO |
853 | case 0xcd: /* fsb frequency */ |
854 | data = 3; | |
855 | break; | |
856 | case MSR_IA32_APICBASE: | |
857 | data = kvm_get_apic_base(vcpu); | |
858 | break; | |
859 | case MSR_IA32_MISC_ENABLE: | |
ad312c7c | 860 | data = vcpu->arch.ia32_misc_enable_msr; |
15c4a640 | 861 | break; |
847f0ad8 AG |
862 | case MSR_IA32_PERF_STATUS: |
863 | /* TSC increment by tick */ | |
864 | data = 1000ULL; | |
865 | /* CPU multiplier */ | |
866 | data |= (((uint64_t)4ULL) << 40); | |
867 | break; | |
15c4a640 | 868 | case MSR_EFER: |
ad312c7c | 869 | data = vcpu->arch.shadow_efer; |
15c4a640 | 870 | break; |
18068523 GOC |
871 | case MSR_KVM_WALL_CLOCK: |
872 | data = vcpu->kvm->arch.wall_clock; | |
873 | break; | |
874 | case MSR_KVM_SYSTEM_TIME: | |
875 | data = vcpu->arch.time; | |
876 | break; | |
15c4a640 CO |
877 | default: |
878 | pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr); | |
879 | return 1; | |
880 | } | |
881 | *pdata = data; | |
882 | return 0; | |
883 | } | |
884 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); | |
885 | ||
313a3dc7 CO |
886 | /* |
887 | * Read or write a bunch of msrs. All parameters are kernel addresses. | |
888 | * | |
889 | * @return number of msrs set successfully. | |
890 | */ | |
891 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, | |
892 | struct kvm_msr_entry *entries, | |
893 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
894 | unsigned index, u64 *data)) | |
895 | { | |
896 | int i; | |
897 | ||
898 | vcpu_load(vcpu); | |
899 | ||
3200f405 | 900 | down_read(&vcpu->kvm->slots_lock); |
313a3dc7 CO |
901 | for (i = 0; i < msrs->nmsrs; ++i) |
902 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) | |
903 | break; | |
3200f405 | 904 | up_read(&vcpu->kvm->slots_lock); |
313a3dc7 CO |
905 | |
906 | vcpu_put(vcpu); | |
907 | ||
908 | return i; | |
909 | } | |
910 | ||
911 | /* | |
912 | * Read or write a bunch of msrs. Parameters are user addresses. | |
913 | * | |
914 | * @return number of msrs set successfully. | |
915 | */ | |
916 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, | |
917 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
918 | unsigned index, u64 *data), | |
919 | int writeback) | |
920 | { | |
921 | struct kvm_msrs msrs; | |
922 | struct kvm_msr_entry *entries; | |
923 | int r, n; | |
924 | unsigned size; | |
925 | ||
926 | r = -EFAULT; | |
927 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) | |
928 | goto out; | |
929 | ||
930 | r = -E2BIG; | |
931 | if (msrs.nmsrs >= MAX_IO_MSRS) | |
932 | goto out; | |
933 | ||
934 | r = -ENOMEM; | |
935 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; | |
936 | entries = vmalloc(size); | |
937 | if (!entries) | |
938 | goto out; | |
939 | ||
940 | r = -EFAULT; | |
941 | if (copy_from_user(entries, user_msrs->entries, size)) | |
942 | goto out_free; | |
943 | ||
944 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); | |
945 | if (r < 0) | |
946 | goto out_free; | |
947 | ||
948 | r = -EFAULT; | |
949 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) | |
950 | goto out_free; | |
951 | ||
952 | r = n; | |
953 | ||
954 | out_free: | |
955 | vfree(entries); | |
956 | out: | |
957 | return r; | |
958 | } | |
959 | ||
018d00d2 ZX |
960 | int kvm_dev_ioctl_check_extension(long ext) |
961 | { | |
962 | int r; | |
963 | ||
964 | switch (ext) { | |
965 | case KVM_CAP_IRQCHIP: | |
966 | case KVM_CAP_HLT: | |
967 | case KVM_CAP_MMU_SHADOW_CACHE_CONTROL: | |
018d00d2 | 968 | case KVM_CAP_SET_TSS_ADDR: |
07716717 | 969 | case KVM_CAP_EXT_CPUID: |
7837699f | 970 | case KVM_CAP_PIT: |
a28e4f5a | 971 | case KVM_CAP_NOP_IO_DELAY: |
62d9f0db | 972 | case KVM_CAP_MP_STATE: |
ed848624 | 973 | case KVM_CAP_SYNC_MMU: |
018d00d2 ZX |
974 | r = 1; |
975 | break; | |
542472b5 LV |
976 | case KVM_CAP_COALESCED_MMIO: |
977 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; | |
978 | break; | |
774ead3a AK |
979 | case KVM_CAP_VAPIC: |
980 | r = !kvm_x86_ops->cpu_has_accelerated_tpr(); | |
981 | break; | |
f725230a AK |
982 | case KVM_CAP_NR_VCPUS: |
983 | r = KVM_MAX_VCPUS; | |
984 | break; | |
a988b910 AK |
985 | case KVM_CAP_NR_MEMSLOTS: |
986 | r = KVM_MEMORY_SLOTS; | |
987 | break; | |
2f333bcb MT |
988 | case KVM_CAP_PV_MMU: |
989 | r = !tdp_enabled; | |
990 | break; | |
62c476c7 | 991 | case KVM_CAP_IOMMU: |
19de40a8 | 992 | r = iommu_found(); |
62c476c7 | 993 | break; |
abe6655d MT |
994 | case KVM_CAP_CLOCKSOURCE: |
995 | r = boot_cpu_has(X86_FEATURE_CONSTANT_TSC); | |
996 | break; | |
018d00d2 ZX |
997 | default: |
998 | r = 0; | |
999 | break; | |
1000 | } | |
1001 | return r; | |
1002 | ||
1003 | } | |
1004 | ||
043405e1 CO |
1005 | long kvm_arch_dev_ioctl(struct file *filp, |
1006 | unsigned int ioctl, unsigned long arg) | |
1007 | { | |
1008 | void __user *argp = (void __user *)arg; | |
1009 | long r; | |
1010 | ||
1011 | switch (ioctl) { | |
1012 | case KVM_GET_MSR_INDEX_LIST: { | |
1013 | struct kvm_msr_list __user *user_msr_list = argp; | |
1014 | struct kvm_msr_list msr_list; | |
1015 | unsigned n; | |
1016 | ||
1017 | r = -EFAULT; | |
1018 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) | |
1019 | goto out; | |
1020 | n = msr_list.nmsrs; | |
1021 | msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs); | |
1022 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) | |
1023 | goto out; | |
1024 | r = -E2BIG; | |
1025 | if (n < num_msrs_to_save) | |
1026 | goto out; | |
1027 | r = -EFAULT; | |
1028 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, | |
1029 | num_msrs_to_save * sizeof(u32))) | |
1030 | goto out; | |
1031 | if (copy_to_user(user_msr_list->indices | |
1032 | + num_msrs_to_save * sizeof(u32), | |
1033 | &emulated_msrs, | |
1034 | ARRAY_SIZE(emulated_msrs) * sizeof(u32))) | |
1035 | goto out; | |
1036 | r = 0; | |
1037 | break; | |
1038 | } | |
674eea0f AK |
1039 | case KVM_GET_SUPPORTED_CPUID: { |
1040 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
1041 | struct kvm_cpuid2 cpuid; | |
1042 | ||
1043 | r = -EFAULT; | |
1044 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
1045 | goto out; | |
1046 | r = kvm_dev_ioctl_get_supported_cpuid(&cpuid, | |
1047 | cpuid_arg->entries); | |
1048 | if (r) | |
1049 | goto out; | |
1050 | ||
1051 | r = -EFAULT; | |
1052 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
1053 | goto out; | |
1054 | r = 0; | |
1055 | break; | |
1056 | } | |
043405e1 CO |
1057 | default: |
1058 | r = -EINVAL; | |
1059 | } | |
1060 | out: | |
1061 | return r; | |
1062 | } | |
1063 | ||
313a3dc7 CO |
1064 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
1065 | { | |
1066 | kvm_x86_ops->vcpu_load(vcpu, cpu); | |
18068523 | 1067 | kvm_write_guest_time(vcpu); |
313a3dc7 CO |
1068 | } |
1069 | ||
1070 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
1071 | { | |
1072 | kvm_x86_ops->vcpu_put(vcpu); | |
9327fd11 | 1073 | kvm_put_guest_fpu(vcpu); |
313a3dc7 CO |
1074 | } |
1075 | ||
07716717 | 1076 | static int is_efer_nx(void) |
313a3dc7 CO |
1077 | { |
1078 | u64 efer; | |
313a3dc7 CO |
1079 | |
1080 | rdmsrl(MSR_EFER, efer); | |
07716717 DK |
1081 | return efer & EFER_NX; |
1082 | } | |
1083 | ||
1084 | static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu) | |
1085 | { | |
1086 | int i; | |
1087 | struct kvm_cpuid_entry2 *e, *entry; | |
1088 | ||
313a3dc7 | 1089 | entry = NULL; |
ad312c7c ZX |
1090 | for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { |
1091 | e = &vcpu->arch.cpuid_entries[i]; | |
313a3dc7 CO |
1092 | if (e->function == 0x80000001) { |
1093 | entry = e; | |
1094 | break; | |
1095 | } | |
1096 | } | |
07716717 | 1097 | if (entry && (entry->edx & (1 << 20)) && !is_efer_nx()) { |
313a3dc7 CO |
1098 | entry->edx &= ~(1 << 20); |
1099 | printk(KERN_INFO "kvm: guest NX capability removed\n"); | |
1100 | } | |
1101 | } | |
1102 | ||
07716717 | 1103 | /* when an old userspace process fills a new kernel module */ |
313a3dc7 CO |
1104 | static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu, |
1105 | struct kvm_cpuid *cpuid, | |
1106 | struct kvm_cpuid_entry __user *entries) | |
07716717 DK |
1107 | { |
1108 | int r, i; | |
1109 | struct kvm_cpuid_entry *cpuid_entries; | |
1110 | ||
1111 | r = -E2BIG; | |
1112 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
1113 | goto out; | |
1114 | r = -ENOMEM; | |
1115 | cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry) * cpuid->nent); | |
1116 | if (!cpuid_entries) | |
1117 | goto out; | |
1118 | r = -EFAULT; | |
1119 | if (copy_from_user(cpuid_entries, entries, | |
1120 | cpuid->nent * sizeof(struct kvm_cpuid_entry))) | |
1121 | goto out_free; | |
1122 | for (i = 0; i < cpuid->nent; i++) { | |
ad312c7c ZX |
1123 | vcpu->arch.cpuid_entries[i].function = cpuid_entries[i].function; |
1124 | vcpu->arch.cpuid_entries[i].eax = cpuid_entries[i].eax; | |
1125 | vcpu->arch.cpuid_entries[i].ebx = cpuid_entries[i].ebx; | |
1126 | vcpu->arch.cpuid_entries[i].ecx = cpuid_entries[i].ecx; | |
1127 | vcpu->arch.cpuid_entries[i].edx = cpuid_entries[i].edx; | |
1128 | vcpu->arch.cpuid_entries[i].index = 0; | |
1129 | vcpu->arch.cpuid_entries[i].flags = 0; | |
1130 | vcpu->arch.cpuid_entries[i].padding[0] = 0; | |
1131 | vcpu->arch.cpuid_entries[i].padding[1] = 0; | |
1132 | vcpu->arch.cpuid_entries[i].padding[2] = 0; | |
1133 | } | |
1134 | vcpu->arch.cpuid_nent = cpuid->nent; | |
07716717 DK |
1135 | cpuid_fix_nx_cap(vcpu); |
1136 | r = 0; | |
1137 | ||
1138 | out_free: | |
1139 | vfree(cpuid_entries); | |
1140 | out: | |
1141 | return r; | |
1142 | } | |
1143 | ||
1144 | static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu, | |
1145 | struct kvm_cpuid2 *cpuid, | |
1146 | struct kvm_cpuid_entry2 __user *entries) | |
313a3dc7 CO |
1147 | { |
1148 | int r; | |
1149 | ||
1150 | r = -E2BIG; | |
1151 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
1152 | goto out; | |
1153 | r = -EFAULT; | |
ad312c7c | 1154 | if (copy_from_user(&vcpu->arch.cpuid_entries, entries, |
07716717 | 1155 | cpuid->nent * sizeof(struct kvm_cpuid_entry2))) |
313a3dc7 | 1156 | goto out; |
ad312c7c | 1157 | vcpu->arch.cpuid_nent = cpuid->nent; |
313a3dc7 CO |
1158 | return 0; |
1159 | ||
1160 | out: | |
1161 | return r; | |
1162 | } | |
1163 | ||
07716717 DK |
1164 | static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu, |
1165 | struct kvm_cpuid2 *cpuid, | |
1166 | struct kvm_cpuid_entry2 __user *entries) | |
1167 | { | |
1168 | int r; | |
1169 | ||
1170 | r = -E2BIG; | |
ad312c7c | 1171 | if (cpuid->nent < vcpu->arch.cpuid_nent) |
07716717 DK |
1172 | goto out; |
1173 | r = -EFAULT; | |
ad312c7c ZX |
1174 | if (copy_to_user(entries, &vcpu->arch.cpuid_entries, |
1175 | vcpu->arch.cpuid_nent * sizeof(struct kvm_cpuid_entry2))) | |
07716717 DK |
1176 | goto out; |
1177 | return 0; | |
1178 | ||
1179 | out: | |
ad312c7c | 1180 | cpuid->nent = vcpu->arch.cpuid_nent; |
07716717 DK |
1181 | return r; |
1182 | } | |
1183 | ||
1184 | static inline u32 bit(int bitno) | |
1185 | { | |
1186 | return 1 << (bitno & 31); | |
1187 | } | |
1188 | ||
1189 | static void do_cpuid_1_ent(struct kvm_cpuid_entry2 *entry, u32 function, | |
1190 | u32 index) | |
1191 | { | |
1192 | entry->function = function; | |
1193 | entry->index = index; | |
1194 | cpuid_count(entry->function, entry->index, | |
1195 | &entry->eax, &entry->ebx, &entry->ecx, &entry->edx); | |
1196 | entry->flags = 0; | |
1197 | } | |
1198 | ||
1199 | static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, | |
1200 | u32 index, int *nent, int maxnent) | |
1201 | { | |
1202 | const u32 kvm_supported_word0_x86_features = bit(X86_FEATURE_FPU) | | |
1203 | bit(X86_FEATURE_VME) | bit(X86_FEATURE_DE) | | |
1204 | bit(X86_FEATURE_PSE) | bit(X86_FEATURE_TSC) | | |
1205 | bit(X86_FEATURE_MSR) | bit(X86_FEATURE_PAE) | | |
1206 | bit(X86_FEATURE_CX8) | bit(X86_FEATURE_APIC) | | |
1207 | bit(X86_FEATURE_SEP) | bit(X86_FEATURE_PGE) | | |
1208 | bit(X86_FEATURE_CMOV) | bit(X86_FEATURE_PSE36) | | |
1209 | bit(X86_FEATURE_CLFLSH) | bit(X86_FEATURE_MMX) | | |
1210 | bit(X86_FEATURE_FXSR) | bit(X86_FEATURE_XMM) | | |
1211 | bit(X86_FEATURE_XMM2) | bit(X86_FEATURE_SELFSNOOP); | |
1212 | const u32 kvm_supported_word1_x86_features = bit(X86_FEATURE_FPU) | | |
1213 | bit(X86_FEATURE_VME) | bit(X86_FEATURE_DE) | | |
1214 | bit(X86_FEATURE_PSE) | bit(X86_FEATURE_TSC) | | |
1215 | bit(X86_FEATURE_MSR) | bit(X86_FEATURE_PAE) | | |
1216 | bit(X86_FEATURE_CX8) | bit(X86_FEATURE_APIC) | | |
1217 | bit(X86_FEATURE_PGE) | | |
1218 | bit(X86_FEATURE_CMOV) | bit(X86_FEATURE_PSE36) | | |
1219 | bit(X86_FEATURE_MMX) | bit(X86_FEATURE_FXSR) | | |
1220 | bit(X86_FEATURE_SYSCALL) | | |
1221 | (bit(X86_FEATURE_NX) && is_efer_nx()) | | |
1222 | #ifdef CONFIG_X86_64 | |
1223 | bit(X86_FEATURE_LM) | | |
1224 | #endif | |
1225 | bit(X86_FEATURE_MMXEXT) | | |
1226 | bit(X86_FEATURE_3DNOWEXT) | | |
1227 | bit(X86_FEATURE_3DNOW); | |
1228 | const u32 kvm_supported_word3_x86_features = | |
1229 | bit(X86_FEATURE_XMM3) | bit(X86_FEATURE_CX16); | |
1230 | const u32 kvm_supported_word6_x86_features = | |
1231 | bit(X86_FEATURE_LAHF_LM) | bit(X86_FEATURE_CMP_LEGACY); | |
1232 | ||
1233 | /* all func 2 cpuid_count() should be called on the same cpu */ | |
1234 | get_cpu(); | |
1235 | do_cpuid_1_ent(entry, function, index); | |
1236 | ++*nent; | |
1237 | ||
1238 | switch (function) { | |
1239 | case 0: | |
1240 | entry->eax = min(entry->eax, (u32)0xb); | |
1241 | break; | |
1242 | case 1: | |
1243 | entry->edx &= kvm_supported_word0_x86_features; | |
1244 | entry->ecx &= kvm_supported_word3_x86_features; | |
1245 | break; | |
1246 | /* function 2 entries are STATEFUL. That is, repeated cpuid commands | |
1247 | * may return different values. This forces us to get_cpu() before | |
1248 | * issuing the first command, and also to emulate this annoying behavior | |
1249 | * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */ | |
1250 | case 2: { | |
1251 | int t, times = entry->eax & 0xff; | |
1252 | ||
1253 | entry->flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; | |
0fdf8e59 | 1254 | entry->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT; |
07716717 DK |
1255 | for (t = 1; t < times && *nent < maxnent; ++t) { |
1256 | do_cpuid_1_ent(&entry[t], function, 0); | |
1257 | entry[t].flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; | |
1258 | ++*nent; | |
1259 | } | |
1260 | break; | |
1261 | } | |
1262 | /* function 4 and 0xb have additional index. */ | |
1263 | case 4: { | |
14af3f3c | 1264 | int i, cache_type; |
07716717 DK |
1265 | |
1266 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
1267 | /* read more entries until cache_type is zero */ | |
14af3f3c HH |
1268 | for (i = 1; *nent < maxnent; ++i) { |
1269 | cache_type = entry[i - 1].eax & 0x1f; | |
07716717 DK |
1270 | if (!cache_type) |
1271 | break; | |
14af3f3c HH |
1272 | do_cpuid_1_ent(&entry[i], function, i); |
1273 | entry[i].flags |= | |
07716717 DK |
1274 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
1275 | ++*nent; | |
1276 | } | |
1277 | break; | |
1278 | } | |
1279 | case 0xb: { | |
14af3f3c | 1280 | int i, level_type; |
07716717 DK |
1281 | |
1282 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
1283 | /* read more entries until level_type is zero */ | |
14af3f3c | 1284 | for (i = 1; *nent < maxnent; ++i) { |
0853d2c1 | 1285 | level_type = entry[i - 1].ecx & 0xff00; |
07716717 DK |
1286 | if (!level_type) |
1287 | break; | |
14af3f3c HH |
1288 | do_cpuid_1_ent(&entry[i], function, i); |
1289 | entry[i].flags |= | |
07716717 DK |
1290 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
1291 | ++*nent; | |
1292 | } | |
1293 | break; | |
1294 | } | |
1295 | case 0x80000000: | |
1296 | entry->eax = min(entry->eax, 0x8000001a); | |
1297 | break; | |
1298 | case 0x80000001: | |
1299 | entry->edx &= kvm_supported_word1_x86_features; | |
1300 | entry->ecx &= kvm_supported_word6_x86_features; | |
1301 | break; | |
1302 | } | |
1303 | put_cpu(); | |
1304 | } | |
1305 | ||
674eea0f | 1306 | static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, |
07716717 DK |
1307 | struct kvm_cpuid_entry2 __user *entries) |
1308 | { | |
1309 | struct kvm_cpuid_entry2 *cpuid_entries; | |
1310 | int limit, nent = 0, r = -E2BIG; | |
1311 | u32 func; | |
1312 | ||
1313 | if (cpuid->nent < 1) | |
1314 | goto out; | |
1315 | r = -ENOMEM; | |
1316 | cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry2) * cpuid->nent); | |
1317 | if (!cpuid_entries) | |
1318 | goto out; | |
1319 | ||
1320 | do_cpuid_ent(&cpuid_entries[0], 0, 0, &nent, cpuid->nent); | |
1321 | limit = cpuid_entries[0].eax; | |
1322 | for (func = 1; func <= limit && nent < cpuid->nent; ++func) | |
1323 | do_cpuid_ent(&cpuid_entries[nent], func, 0, | |
1324 | &nent, cpuid->nent); | |
1325 | r = -E2BIG; | |
1326 | if (nent >= cpuid->nent) | |
1327 | goto out_free; | |
1328 | ||
1329 | do_cpuid_ent(&cpuid_entries[nent], 0x80000000, 0, &nent, cpuid->nent); | |
1330 | limit = cpuid_entries[nent - 1].eax; | |
1331 | for (func = 0x80000001; func <= limit && nent < cpuid->nent; ++func) | |
1332 | do_cpuid_ent(&cpuid_entries[nent], func, 0, | |
1333 | &nent, cpuid->nent); | |
1334 | r = -EFAULT; | |
1335 | if (copy_to_user(entries, cpuid_entries, | |
1336 | nent * sizeof(struct kvm_cpuid_entry2))) | |
1337 | goto out_free; | |
1338 | cpuid->nent = nent; | |
1339 | r = 0; | |
1340 | ||
1341 | out_free: | |
1342 | vfree(cpuid_entries); | |
1343 | out: | |
1344 | return r; | |
1345 | } | |
1346 | ||
313a3dc7 CO |
1347 | static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu, |
1348 | struct kvm_lapic_state *s) | |
1349 | { | |
1350 | vcpu_load(vcpu); | |
ad312c7c | 1351 | memcpy(s->regs, vcpu->arch.apic->regs, sizeof *s); |
313a3dc7 CO |
1352 | vcpu_put(vcpu); |
1353 | ||
1354 | return 0; | |
1355 | } | |
1356 | ||
1357 | static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu, | |
1358 | struct kvm_lapic_state *s) | |
1359 | { | |
1360 | vcpu_load(vcpu); | |
ad312c7c | 1361 | memcpy(vcpu->arch.apic->regs, s->regs, sizeof *s); |
313a3dc7 CO |
1362 | kvm_apic_post_state_restore(vcpu); |
1363 | vcpu_put(vcpu); | |
1364 | ||
1365 | return 0; | |
1366 | } | |
1367 | ||
f77bc6a4 ZX |
1368 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
1369 | struct kvm_interrupt *irq) | |
1370 | { | |
1371 | if (irq->irq < 0 || irq->irq >= 256) | |
1372 | return -EINVAL; | |
1373 | if (irqchip_in_kernel(vcpu->kvm)) | |
1374 | return -ENXIO; | |
1375 | vcpu_load(vcpu); | |
1376 | ||
ad312c7c ZX |
1377 | set_bit(irq->irq, vcpu->arch.irq_pending); |
1378 | set_bit(irq->irq / BITS_PER_LONG, &vcpu->arch.irq_summary); | |
f77bc6a4 ZX |
1379 | |
1380 | vcpu_put(vcpu); | |
1381 | ||
1382 | return 0; | |
1383 | } | |
1384 | ||
c4abb7c9 JK |
1385 | static int kvm_vcpu_ioctl_nmi(struct kvm_vcpu *vcpu) |
1386 | { | |
1387 | vcpu_load(vcpu); | |
1388 | kvm_inject_nmi(vcpu); | |
1389 | vcpu_put(vcpu); | |
1390 | ||
1391 | return 0; | |
1392 | } | |
1393 | ||
b209749f AK |
1394 | static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu, |
1395 | struct kvm_tpr_access_ctl *tac) | |
1396 | { | |
1397 | if (tac->flags) | |
1398 | return -EINVAL; | |
1399 | vcpu->arch.tpr_access_reporting = !!tac->enabled; | |
1400 | return 0; | |
1401 | } | |
1402 | ||
313a3dc7 CO |
1403 | long kvm_arch_vcpu_ioctl(struct file *filp, |
1404 | unsigned int ioctl, unsigned long arg) | |
1405 | { | |
1406 | struct kvm_vcpu *vcpu = filp->private_data; | |
1407 | void __user *argp = (void __user *)arg; | |
1408 | int r; | |
b772ff36 | 1409 | struct kvm_lapic_state *lapic = NULL; |
313a3dc7 CO |
1410 | |
1411 | switch (ioctl) { | |
1412 | case KVM_GET_LAPIC: { | |
b772ff36 | 1413 | lapic = kzalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
313a3dc7 | 1414 | |
b772ff36 DH |
1415 | r = -ENOMEM; |
1416 | if (!lapic) | |
1417 | goto out; | |
1418 | r = kvm_vcpu_ioctl_get_lapic(vcpu, lapic); | |
313a3dc7 CO |
1419 | if (r) |
1420 | goto out; | |
1421 | r = -EFAULT; | |
b772ff36 | 1422 | if (copy_to_user(argp, lapic, sizeof(struct kvm_lapic_state))) |
313a3dc7 CO |
1423 | goto out; |
1424 | r = 0; | |
1425 | break; | |
1426 | } | |
1427 | case KVM_SET_LAPIC: { | |
b772ff36 DH |
1428 | lapic = kmalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
1429 | r = -ENOMEM; | |
1430 | if (!lapic) | |
1431 | goto out; | |
313a3dc7 | 1432 | r = -EFAULT; |
b772ff36 | 1433 | if (copy_from_user(lapic, argp, sizeof(struct kvm_lapic_state))) |
313a3dc7 | 1434 | goto out; |
b772ff36 | 1435 | r = kvm_vcpu_ioctl_set_lapic(vcpu, lapic); |
313a3dc7 CO |
1436 | if (r) |
1437 | goto out; | |
1438 | r = 0; | |
1439 | break; | |
1440 | } | |
f77bc6a4 ZX |
1441 | case KVM_INTERRUPT: { |
1442 | struct kvm_interrupt irq; | |
1443 | ||
1444 | r = -EFAULT; | |
1445 | if (copy_from_user(&irq, argp, sizeof irq)) | |
1446 | goto out; | |
1447 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); | |
1448 | if (r) | |
1449 | goto out; | |
1450 | r = 0; | |
1451 | break; | |
1452 | } | |
c4abb7c9 JK |
1453 | case KVM_NMI: { |
1454 | r = kvm_vcpu_ioctl_nmi(vcpu); | |
1455 | if (r) | |
1456 | goto out; | |
1457 | r = 0; | |
1458 | break; | |
1459 | } | |
313a3dc7 CO |
1460 | case KVM_SET_CPUID: { |
1461 | struct kvm_cpuid __user *cpuid_arg = argp; | |
1462 | struct kvm_cpuid cpuid; | |
1463 | ||
1464 | r = -EFAULT; | |
1465 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
1466 | goto out; | |
1467 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); | |
1468 | if (r) | |
1469 | goto out; | |
1470 | break; | |
1471 | } | |
07716717 DK |
1472 | case KVM_SET_CPUID2: { |
1473 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
1474 | struct kvm_cpuid2 cpuid; | |
1475 | ||
1476 | r = -EFAULT; | |
1477 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
1478 | goto out; | |
1479 | r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid, | |
1480 | cpuid_arg->entries); | |
1481 | if (r) | |
1482 | goto out; | |
1483 | break; | |
1484 | } | |
1485 | case KVM_GET_CPUID2: { | |
1486 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
1487 | struct kvm_cpuid2 cpuid; | |
1488 | ||
1489 | r = -EFAULT; | |
1490 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
1491 | goto out; | |
1492 | r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid, | |
1493 | cpuid_arg->entries); | |
1494 | if (r) | |
1495 | goto out; | |
1496 | r = -EFAULT; | |
1497 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
1498 | goto out; | |
1499 | r = 0; | |
1500 | break; | |
1501 | } | |
313a3dc7 CO |
1502 | case KVM_GET_MSRS: |
1503 | r = msr_io(vcpu, argp, kvm_get_msr, 1); | |
1504 | break; | |
1505 | case KVM_SET_MSRS: | |
1506 | r = msr_io(vcpu, argp, do_set_msr, 0); | |
1507 | break; | |
b209749f AK |
1508 | case KVM_TPR_ACCESS_REPORTING: { |
1509 | struct kvm_tpr_access_ctl tac; | |
1510 | ||
1511 | r = -EFAULT; | |
1512 | if (copy_from_user(&tac, argp, sizeof tac)) | |
1513 | goto out; | |
1514 | r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac); | |
1515 | if (r) | |
1516 | goto out; | |
1517 | r = -EFAULT; | |
1518 | if (copy_to_user(argp, &tac, sizeof tac)) | |
1519 | goto out; | |
1520 | r = 0; | |
1521 | break; | |
1522 | }; | |
b93463aa AK |
1523 | case KVM_SET_VAPIC_ADDR: { |
1524 | struct kvm_vapic_addr va; | |
1525 | ||
1526 | r = -EINVAL; | |
1527 | if (!irqchip_in_kernel(vcpu->kvm)) | |
1528 | goto out; | |
1529 | r = -EFAULT; | |
1530 | if (copy_from_user(&va, argp, sizeof va)) | |
1531 | goto out; | |
1532 | r = 0; | |
1533 | kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr); | |
1534 | break; | |
1535 | } | |
313a3dc7 CO |
1536 | default: |
1537 | r = -EINVAL; | |
1538 | } | |
1539 | out: | |
b772ff36 DH |
1540 | if (lapic) |
1541 | kfree(lapic); | |
313a3dc7 CO |
1542 | return r; |
1543 | } | |
1544 | ||
1fe779f8 CO |
1545 | static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr) |
1546 | { | |
1547 | int ret; | |
1548 | ||
1549 | if (addr > (unsigned int)(-3 * PAGE_SIZE)) | |
1550 | return -1; | |
1551 | ret = kvm_x86_ops->set_tss_addr(kvm, addr); | |
1552 | return ret; | |
1553 | } | |
1554 | ||
1555 | static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm, | |
1556 | u32 kvm_nr_mmu_pages) | |
1557 | { | |
1558 | if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES) | |
1559 | return -EINVAL; | |
1560 | ||
72dc67a6 | 1561 | down_write(&kvm->slots_lock); |
1fe779f8 CO |
1562 | |
1563 | kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages); | |
f05e70ac | 1564 | kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages; |
1fe779f8 | 1565 | |
72dc67a6 | 1566 | up_write(&kvm->slots_lock); |
1fe779f8 CO |
1567 | return 0; |
1568 | } | |
1569 | ||
1570 | static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm) | |
1571 | { | |
f05e70ac | 1572 | return kvm->arch.n_alloc_mmu_pages; |
1fe779f8 CO |
1573 | } |
1574 | ||
e9f85cde ZX |
1575 | gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) |
1576 | { | |
1577 | int i; | |
1578 | struct kvm_mem_alias *alias; | |
1579 | ||
d69fb81f ZX |
1580 | for (i = 0; i < kvm->arch.naliases; ++i) { |
1581 | alias = &kvm->arch.aliases[i]; | |
e9f85cde ZX |
1582 | if (gfn >= alias->base_gfn |
1583 | && gfn < alias->base_gfn + alias->npages) | |
1584 | return alias->target_gfn + gfn - alias->base_gfn; | |
1585 | } | |
1586 | return gfn; | |
1587 | } | |
1588 | ||
1fe779f8 CO |
1589 | /* |
1590 | * Set a new alias region. Aliases map a portion of physical memory into | |
1591 | * another portion. This is useful for memory windows, for example the PC | |
1592 | * VGA region. | |
1593 | */ | |
1594 | static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm, | |
1595 | struct kvm_memory_alias *alias) | |
1596 | { | |
1597 | int r, n; | |
1598 | struct kvm_mem_alias *p; | |
1599 | ||
1600 | r = -EINVAL; | |
1601 | /* General sanity checks */ | |
1602 | if (alias->memory_size & (PAGE_SIZE - 1)) | |
1603 | goto out; | |
1604 | if (alias->guest_phys_addr & (PAGE_SIZE - 1)) | |
1605 | goto out; | |
1606 | if (alias->slot >= KVM_ALIAS_SLOTS) | |
1607 | goto out; | |
1608 | if (alias->guest_phys_addr + alias->memory_size | |
1609 | < alias->guest_phys_addr) | |
1610 | goto out; | |
1611 | if (alias->target_phys_addr + alias->memory_size | |
1612 | < alias->target_phys_addr) | |
1613 | goto out; | |
1614 | ||
72dc67a6 | 1615 | down_write(&kvm->slots_lock); |
a1708ce8 | 1616 | spin_lock(&kvm->mmu_lock); |
1fe779f8 | 1617 | |
d69fb81f | 1618 | p = &kvm->arch.aliases[alias->slot]; |
1fe779f8 CO |
1619 | p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT; |
1620 | p->npages = alias->memory_size >> PAGE_SHIFT; | |
1621 | p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT; | |
1622 | ||
1623 | for (n = KVM_ALIAS_SLOTS; n > 0; --n) | |
d69fb81f | 1624 | if (kvm->arch.aliases[n - 1].npages) |
1fe779f8 | 1625 | break; |
d69fb81f | 1626 | kvm->arch.naliases = n; |
1fe779f8 | 1627 | |
a1708ce8 | 1628 | spin_unlock(&kvm->mmu_lock); |
1fe779f8 CO |
1629 | kvm_mmu_zap_all(kvm); |
1630 | ||
72dc67a6 | 1631 | up_write(&kvm->slots_lock); |
1fe779f8 CO |
1632 | |
1633 | return 0; | |
1634 | ||
1635 | out: | |
1636 | return r; | |
1637 | } | |
1638 | ||
1639 | static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
1640 | { | |
1641 | int r; | |
1642 | ||
1643 | r = 0; | |
1644 | switch (chip->chip_id) { | |
1645 | case KVM_IRQCHIP_PIC_MASTER: | |
1646 | memcpy(&chip->chip.pic, | |
1647 | &pic_irqchip(kvm)->pics[0], | |
1648 | sizeof(struct kvm_pic_state)); | |
1649 | break; | |
1650 | case KVM_IRQCHIP_PIC_SLAVE: | |
1651 | memcpy(&chip->chip.pic, | |
1652 | &pic_irqchip(kvm)->pics[1], | |
1653 | sizeof(struct kvm_pic_state)); | |
1654 | break; | |
1655 | case KVM_IRQCHIP_IOAPIC: | |
1656 | memcpy(&chip->chip.ioapic, | |
1657 | ioapic_irqchip(kvm), | |
1658 | sizeof(struct kvm_ioapic_state)); | |
1659 | break; | |
1660 | default: | |
1661 | r = -EINVAL; | |
1662 | break; | |
1663 | } | |
1664 | return r; | |
1665 | } | |
1666 | ||
1667 | static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
1668 | { | |
1669 | int r; | |
1670 | ||
1671 | r = 0; | |
1672 | switch (chip->chip_id) { | |
1673 | case KVM_IRQCHIP_PIC_MASTER: | |
1674 | memcpy(&pic_irqchip(kvm)->pics[0], | |
1675 | &chip->chip.pic, | |
1676 | sizeof(struct kvm_pic_state)); | |
1677 | break; | |
1678 | case KVM_IRQCHIP_PIC_SLAVE: | |
1679 | memcpy(&pic_irqchip(kvm)->pics[1], | |
1680 | &chip->chip.pic, | |
1681 | sizeof(struct kvm_pic_state)); | |
1682 | break; | |
1683 | case KVM_IRQCHIP_IOAPIC: | |
1684 | memcpy(ioapic_irqchip(kvm), | |
1685 | &chip->chip.ioapic, | |
1686 | sizeof(struct kvm_ioapic_state)); | |
1687 | break; | |
1688 | default: | |
1689 | r = -EINVAL; | |
1690 | break; | |
1691 | } | |
1692 | kvm_pic_update_irq(pic_irqchip(kvm)); | |
1693 | return r; | |
1694 | } | |
1695 | ||
e0f63cb9 SY |
1696 | static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps) |
1697 | { | |
1698 | int r = 0; | |
1699 | ||
1700 | memcpy(ps, &kvm->arch.vpit->pit_state, sizeof(struct kvm_pit_state)); | |
1701 | return r; | |
1702 | } | |
1703 | ||
1704 | static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps) | |
1705 | { | |
1706 | int r = 0; | |
1707 | ||
1708 | memcpy(&kvm->arch.vpit->pit_state, ps, sizeof(struct kvm_pit_state)); | |
1709 | kvm_pit_load_count(kvm, 0, ps->channels[0].count); | |
1710 | return r; | |
1711 | } | |
1712 | ||
5bb064dc ZX |
1713 | /* |
1714 | * Get (and clear) the dirty memory log for a memory slot. | |
1715 | */ | |
1716 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
1717 | struct kvm_dirty_log *log) | |
1718 | { | |
1719 | int r; | |
1720 | int n; | |
1721 | struct kvm_memory_slot *memslot; | |
1722 | int is_dirty = 0; | |
1723 | ||
72dc67a6 | 1724 | down_write(&kvm->slots_lock); |
5bb064dc ZX |
1725 | |
1726 | r = kvm_get_dirty_log(kvm, log, &is_dirty); | |
1727 | if (r) | |
1728 | goto out; | |
1729 | ||
1730 | /* If nothing is dirty, don't bother messing with page tables. */ | |
1731 | if (is_dirty) { | |
1732 | kvm_mmu_slot_remove_write_access(kvm, log->slot); | |
1733 | kvm_flush_remote_tlbs(kvm); | |
1734 | memslot = &kvm->memslots[log->slot]; | |
1735 | n = ALIGN(memslot->npages, BITS_PER_LONG) / 8; | |
1736 | memset(memslot->dirty_bitmap, 0, n); | |
1737 | } | |
1738 | r = 0; | |
1739 | out: | |
72dc67a6 | 1740 | up_write(&kvm->slots_lock); |
5bb064dc ZX |
1741 | return r; |
1742 | } | |
1743 | ||
1fe779f8 CO |
1744 | long kvm_arch_vm_ioctl(struct file *filp, |
1745 | unsigned int ioctl, unsigned long arg) | |
1746 | { | |
1747 | struct kvm *kvm = filp->private_data; | |
1748 | void __user *argp = (void __user *)arg; | |
1749 | int r = -EINVAL; | |
f0d66275 DH |
1750 | /* |
1751 | * This union makes it completely explicit to gcc-3.x | |
1752 | * that these two variables' stack usage should be | |
1753 | * combined, not added together. | |
1754 | */ | |
1755 | union { | |
1756 | struct kvm_pit_state ps; | |
1757 | struct kvm_memory_alias alias; | |
1758 | } u; | |
1fe779f8 CO |
1759 | |
1760 | switch (ioctl) { | |
1761 | case KVM_SET_TSS_ADDR: | |
1762 | r = kvm_vm_ioctl_set_tss_addr(kvm, arg); | |
1763 | if (r < 0) | |
1764 | goto out; | |
1765 | break; | |
1766 | case KVM_SET_MEMORY_REGION: { | |
1767 | struct kvm_memory_region kvm_mem; | |
1768 | struct kvm_userspace_memory_region kvm_userspace_mem; | |
1769 | ||
1770 | r = -EFAULT; | |
1771 | if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem)) | |
1772 | goto out; | |
1773 | kvm_userspace_mem.slot = kvm_mem.slot; | |
1774 | kvm_userspace_mem.flags = kvm_mem.flags; | |
1775 | kvm_userspace_mem.guest_phys_addr = kvm_mem.guest_phys_addr; | |
1776 | kvm_userspace_mem.memory_size = kvm_mem.memory_size; | |
1777 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 0); | |
1778 | if (r) | |
1779 | goto out; | |
1780 | break; | |
1781 | } | |
1782 | case KVM_SET_NR_MMU_PAGES: | |
1783 | r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg); | |
1784 | if (r) | |
1785 | goto out; | |
1786 | break; | |
1787 | case KVM_GET_NR_MMU_PAGES: | |
1788 | r = kvm_vm_ioctl_get_nr_mmu_pages(kvm); | |
1789 | break; | |
f0d66275 | 1790 | case KVM_SET_MEMORY_ALIAS: |
1fe779f8 | 1791 | r = -EFAULT; |
f0d66275 | 1792 | if (copy_from_user(&u.alias, argp, sizeof(struct kvm_memory_alias))) |
1fe779f8 | 1793 | goto out; |
f0d66275 | 1794 | r = kvm_vm_ioctl_set_memory_alias(kvm, &u.alias); |
1fe779f8 CO |
1795 | if (r) |
1796 | goto out; | |
1797 | break; | |
1fe779f8 CO |
1798 | case KVM_CREATE_IRQCHIP: |
1799 | r = -ENOMEM; | |
d7deeeb0 ZX |
1800 | kvm->arch.vpic = kvm_create_pic(kvm); |
1801 | if (kvm->arch.vpic) { | |
1fe779f8 CO |
1802 | r = kvm_ioapic_init(kvm); |
1803 | if (r) { | |
d7deeeb0 ZX |
1804 | kfree(kvm->arch.vpic); |
1805 | kvm->arch.vpic = NULL; | |
1fe779f8 CO |
1806 | goto out; |
1807 | } | |
1808 | } else | |
1809 | goto out; | |
1810 | break; | |
7837699f SY |
1811 | case KVM_CREATE_PIT: |
1812 | r = -ENOMEM; | |
1813 | kvm->arch.vpit = kvm_create_pit(kvm); | |
1814 | if (kvm->arch.vpit) | |
1815 | r = 0; | |
1816 | break; | |
1fe779f8 CO |
1817 | case KVM_IRQ_LINE: { |
1818 | struct kvm_irq_level irq_event; | |
1819 | ||
1820 | r = -EFAULT; | |
1821 | if (copy_from_user(&irq_event, argp, sizeof irq_event)) | |
1822 | goto out; | |
1823 | if (irqchip_in_kernel(kvm)) { | |
1824 | mutex_lock(&kvm->lock); | |
5550af4d SY |
1825 | kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, |
1826 | irq_event.irq, irq_event.level); | |
1fe779f8 CO |
1827 | mutex_unlock(&kvm->lock); |
1828 | r = 0; | |
1829 | } | |
1830 | break; | |
1831 | } | |
1832 | case KVM_GET_IRQCHIP: { | |
1833 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
f0d66275 | 1834 | struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); |
1fe779f8 | 1835 | |
f0d66275 DH |
1836 | r = -ENOMEM; |
1837 | if (!chip) | |
1fe779f8 | 1838 | goto out; |
f0d66275 DH |
1839 | r = -EFAULT; |
1840 | if (copy_from_user(chip, argp, sizeof *chip)) | |
1841 | goto get_irqchip_out; | |
1fe779f8 CO |
1842 | r = -ENXIO; |
1843 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
1844 | goto get_irqchip_out; |
1845 | r = kvm_vm_ioctl_get_irqchip(kvm, chip); | |
1fe779f8 | 1846 | if (r) |
f0d66275 | 1847 | goto get_irqchip_out; |
1fe779f8 | 1848 | r = -EFAULT; |
f0d66275 DH |
1849 | if (copy_to_user(argp, chip, sizeof *chip)) |
1850 | goto get_irqchip_out; | |
1fe779f8 | 1851 | r = 0; |
f0d66275 DH |
1852 | get_irqchip_out: |
1853 | kfree(chip); | |
1854 | if (r) | |
1855 | goto out; | |
1fe779f8 CO |
1856 | break; |
1857 | } | |
1858 | case KVM_SET_IRQCHIP: { | |
1859 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
f0d66275 | 1860 | struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); |
1fe779f8 | 1861 | |
f0d66275 DH |
1862 | r = -ENOMEM; |
1863 | if (!chip) | |
1fe779f8 | 1864 | goto out; |
f0d66275 DH |
1865 | r = -EFAULT; |
1866 | if (copy_from_user(chip, argp, sizeof *chip)) | |
1867 | goto set_irqchip_out; | |
1fe779f8 CO |
1868 | r = -ENXIO; |
1869 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
1870 | goto set_irqchip_out; |
1871 | r = kvm_vm_ioctl_set_irqchip(kvm, chip); | |
1fe779f8 | 1872 | if (r) |
f0d66275 | 1873 | goto set_irqchip_out; |
1fe779f8 | 1874 | r = 0; |
f0d66275 DH |
1875 | set_irqchip_out: |
1876 | kfree(chip); | |
1877 | if (r) | |
1878 | goto out; | |
1fe779f8 CO |
1879 | break; |
1880 | } | |
e0f63cb9 | 1881 | case KVM_GET_PIT: { |
e0f63cb9 | 1882 | r = -EFAULT; |
f0d66275 | 1883 | if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
1884 | goto out; |
1885 | r = -ENXIO; | |
1886 | if (!kvm->arch.vpit) | |
1887 | goto out; | |
f0d66275 | 1888 | r = kvm_vm_ioctl_get_pit(kvm, &u.ps); |
e0f63cb9 SY |
1889 | if (r) |
1890 | goto out; | |
1891 | r = -EFAULT; | |
f0d66275 | 1892 | if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
1893 | goto out; |
1894 | r = 0; | |
1895 | break; | |
1896 | } | |
1897 | case KVM_SET_PIT: { | |
e0f63cb9 | 1898 | r = -EFAULT; |
f0d66275 | 1899 | if (copy_from_user(&u.ps, argp, sizeof u.ps)) |
e0f63cb9 SY |
1900 | goto out; |
1901 | r = -ENXIO; | |
1902 | if (!kvm->arch.vpit) | |
1903 | goto out; | |
f0d66275 | 1904 | r = kvm_vm_ioctl_set_pit(kvm, &u.ps); |
e0f63cb9 SY |
1905 | if (r) |
1906 | goto out; | |
1907 | r = 0; | |
1908 | break; | |
1909 | } | |
1fe779f8 CO |
1910 | default: |
1911 | ; | |
1912 | } | |
1913 | out: | |
1914 | return r; | |
1915 | } | |
1916 | ||
a16b043c | 1917 | static void kvm_init_msr_list(void) |
043405e1 CO |
1918 | { |
1919 | u32 dummy[2]; | |
1920 | unsigned i, j; | |
1921 | ||
1922 | for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) { | |
1923 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) | |
1924 | continue; | |
1925 | if (j < i) | |
1926 | msrs_to_save[j] = msrs_to_save[i]; | |
1927 | j++; | |
1928 | } | |
1929 | num_msrs_to_save = j; | |
1930 | } | |
1931 | ||
bbd9b64e CO |
1932 | /* |
1933 | * Only apic need an MMIO device hook, so shortcut now.. | |
1934 | */ | |
1935 | static struct kvm_io_device *vcpu_find_pervcpu_dev(struct kvm_vcpu *vcpu, | |
92760499 LV |
1936 | gpa_t addr, int len, |
1937 | int is_write) | |
bbd9b64e CO |
1938 | { |
1939 | struct kvm_io_device *dev; | |
1940 | ||
ad312c7c ZX |
1941 | if (vcpu->arch.apic) { |
1942 | dev = &vcpu->arch.apic->dev; | |
92760499 | 1943 | if (dev->in_range(dev, addr, len, is_write)) |
bbd9b64e CO |
1944 | return dev; |
1945 | } | |
1946 | return NULL; | |
1947 | } | |
1948 | ||
1949 | ||
1950 | static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu, | |
92760499 LV |
1951 | gpa_t addr, int len, |
1952 | int is_write) | |
bbd9b64e CO |
1953 | { |
1954 | struct kvm_io_device *dev; | |
1955 | ||
92760499 | 1956 | dev = vcpu_find_pervcpu_dev(vcpu, addr, len, is_write); |
bbd9b64e | 1957 | if (dev == NULL) |
92760499 LV |
1958 | dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr, len, |
1959 | is_write); | |
bbd9b64e CO |
1960 | return dev; |
1961 | } | |
1962 | ||
1963 | int emulator_read_std(unsigned long addr, | |
1964 | void *val, | |
1965 | unsigned int bytes, | |
1966 | struct kvm_vcpu *vcpu) | |
1967 | { | |
1968 | void *data = val; | |
10589a46 | 1969 | int r = X86EMUL_CONTINUE; |
bbd9b64e CO |
1970 | |
1971 | while (bytes) { | |
ad312c7c | 1972 | gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
bbd9b64e CO |
1973 | unsigned offset = addr & (PAGE_SIZE-1); |
1974 | unsigned tocopy = min(bytes, (unsigned)PAGE_SIZE - offset); | |
1975 | int ret; | |
1976 | ||
10589a46 MT |
1977 | if (gpa == UNMAPPED_GVA) { |
1978 | r = X86EMUL_PROPAGATE_FAULT; | |
1979 | goto out; | |
1980 | } | |
bbd9b64e | 1981 | ret = kvm_read_guest(vcpu->kvm, gpa, data, tocopy); |
10589a46 MT |
1982 | if (ret < 0) { |
1983 | r = X86EMUL_UNHANDLEABLE; | |
1984 | goto out; | |
1985 | } | |
bbd9b64e CO |
1986 | |
1987 | bytes -= tocopy; | |
1988 | data += tocopy; | |
1989 | addr += tocopy; | |
1990 | } | |
10589a46 | 1991 | out: |
10589a46 | 1992 | return r; |
bbd9b64e CO |
1993 | } |
1994 | EXPORT_SYMBOL_GPL(emulator_read_std); | |
1995 | ||
bbd9b64e CO |
1996 | static int emulator_read_emulated(unsigned long addr, |
1997 | void *val, | |
1998 | unsigned int bytes, | |
1999 | struct kvm_vcpu *vcpu) | |
2000 | { | |
2001 | struct kvm_io_device *mmio_dev; | |
2002 | gpa_t gpa; | |
2003 | ||
2004 | if (vcpu->mmio_read_completed) { | |
2005 | memcpy(val, vcpu->mmio_data, bytes); | |
2006 | vcpu->mmio_read_completed = 0; | |
2007 | return X86EMUL_CONTINUE; | |
2008 | } | |
2009 | ||
ad312c7c | 2010 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
bbd9b64e CO |
2011 | |
2012 | /* For APIC access vmexit */ | |
2013 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
2014 | goto mmio; | |
2015 | ||
2016 | if (emulator_read_std(addr, val, bytes, vcpu) | |
2017 | == X86EMUL_CONTINUE) | |
2018 | return X86EMUL_CONTINUE; | |
2019 | if (gpa == UNMAPPED_GVA) | |
2020 | return X86EMUL_PROPAGATE_FAULT; | |
2021 | ||
2022 | mmio: | |
2023 | /* | |
2024 | * Is this MMIO handled locally? | |
2025 | */ | |
10589a46 | 2026 | mutex_lock(&vcpu->kvm->lock); |
92760499 | 2027 | mmio_dev = vcpu_find_mmio_dev(vcpu, gpa, bytes, 0); |
bbd9b64e CO |
2028 | if (mmio_dev) { |
2029 | kvm_iodevice_read(mmio_dev, gpa, bytes, val); | |
10589a46 | 2030 | mutex_unlock(&vcpu->kvm->lock); |
bbd9b64e CO |
2031 | return X86EMUL_CONTINUE; |
2032 | } | |
10589a46 | 2033 | mutex_unlock(&vcpu->kvm->lock); |
bbd9b64e CO |
2034 | |
2035 | vcpu->mmio_needed = 1; | |
2036 | vcpu->mmio_phys_addr = gpa; | |
2037 | vcpu->mmio_size = bytes; | |
2038 | vcpu->mmio_is_write = 0; | |
2039 | ||
2040 | return X86EMUL_UNHANDLEABLE; | |
2041 | } | |
2042 | ||
3200f405 | 2043 | int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
9f811285 | 2044 | const void *val, int bytes) |
bbd9b64e CO |
2045 | { |
2046 | int ret; | |
2047 | ||
2048 | ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes); | |
9f811285 | 2049 | if (ret < 0) |
bbd9b64e | 2050 | return 0; |
ad218f85 | 2051 | kvm_mmu_pte_write(vcpu, gpa, val, bytes, 1); |
bbd9b64e CO |
2052 | return 1; |
2053 | } | |
2054 | ||
2055 | static int emulator_write_emulated_onepage(unsigned long addr, | |
2056 | const void *val, | |
2057 | unsigned int bytes, | |
2058 | struct kvm_vcpu *vcpu) | |
2059 | { | |
2060 | struct kvm_io_device *mmio_dev; | |
10589a46 MT |
2061 | gpa_t gpa; |
2062 | ||
10589a46 | 2063 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
bbd9b64e CO |
2064 | |
2065 | if (gpa == UNMAPPED_GVA) { | |
c3c91fee | 2066 | kvm_inject_page_fault(vcpu, addr, 2); |
bbd9b64e CO |
2067 | return X86EMUL_PROPAGATE_FAULT; |
2068 | } | |
2069 | ||
2070 | /* For APIC access vmexit */ | |
2071 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
2072 | goto mmio; | |
2073 | ||
2074 | if (emulator_write_phys(vcpu, gpa, val, bytes)) | |
2075 | return X86EMUL_CONTINUE; | |
2076 | ||
2077 | mmio: | |
2078 | /* | |
2079 | * Is this MMIO handled locally? | |
2080 | */ | |
10589a46 | 2081 | mutex_lock(&vcpu->kvm->lock); |
92760499 | 2082 | mmio_dev = vcpu_find_mmio_dev(vcpu, gpa, bytes, 1); |
bbd9b64e CO |
2083 | if (mmio_dev) { |
2084 | kvm_iodevice_write(mmio_dev, gpa, bytes, val); | |
10589a46 | 2085 | mutex_unlock(&vcpu->kvm->lock); |
bbd9b64e CO |
2086 | return X86EMUL_CONTINUE; |
2087 | } | |
10589a46 | 2088 | mutex_unlock(&vcpu->kvm->lock); |
bbd9b64e CO |
2089 | |
2090 | vcpu->mmio_needed = 1; | |
2091 | vcpu->mmio_phys_addr = gpa; | |
2092 | vcpu->mmio_size = bytes; | |
2093 | vcpu->mmio_is_write = 1; | |
2094 | memcpy(vcpu->mmio_data, val, bytes); | |
2095 | ||
2096 | return X86EMUL_CONTINUE; | |
2097 | } | |
2098 | ||
2099 | int emulator_write_emulated(unsigned long addr, | |
2100 | const void *val, | |
2101 | unsigned int bytes, | |
2102 | struct kvm_vcpu *vcpu) | |
2103 | { | |
2104 | /* Crossing a page boundary? */ | |
2105 | if (((addr + bytes - 1) ^ addr) & PAGE_MASK) { | |
2106 | int rc, now; | |
2107 | ||
2108 | now = -addr & ~PAGE_MASK; | |
2109 | rc = emulator_write_emulated_onepage(addr, val, now, vcpu); | |
2110 | if (rc != X86EMUL_CONTINUE) | |
2111 | return rc; | |
2112 | addr += now; | |
2113 | val += now; | |
2114 | bytes -= now; | |
2115 | } | |
2116 | return emulator_write_emulated_onepage(addr, val, bytes, vcpu); | |
2117 | } | |
2118 | EXPORT_SYMBOL_GPL(emulator_write_emulated); | |
2119 | ||
2120 | static int emulator_cmpxchg_emulated(unsigned long addr, | |
2121 | const void *old, | |
2122 | const void *new, | |
2123 | unsigned int bytes, | |
2124 | struct kvm_vcpu *vcpu) | |
2125 | { | |
2126 | static int reported; | |
2127 | ||
2128 | if (!reported) { | |
2129 | reported = 1; | |
2130 | printk(KERN_WARNING "kvm: emulating exchange as write\n"); | |
2131 | } | |
2bacc55c MT |
2132 | #ifndef CONFIG_X86_64 |
2133 | /* guests cmpxchg8b have to be emulated atomically */ | |
2134 | if (bytes == 8) { | |
10589a46 | 2135 | gpa_t gpa; |
2bacc55c | 2136 | struct page *page; |
c0b49b0d | 2137 | char *kaddr; |
2bacc55c MT |
2138 | u64 val; |
2139 | ||
10589a46 MT |
2140 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
2141 | ||
2bacc55c MT |
2142 | if (gpa == UNMAPPED_GVA || |
2143 | (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
2144 | goto emul_write; | |
2145 | ||
2146 | if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK)) | |
2147 | goto emul_write; | |
2148 | ||
2149 | val = *(u64 *)new; | |
72dc67a6 | 2150 | |
2bacc55c | 2151 | page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT); |
72dc67a6 | 2152 | |
c0b49b0d AM |
2153 | kaddr = kmap_atomic(page, KM_USER0); |
2154 | set_64bit((u64 *)(kaddr + offset_in_page(gpa)), val); | |
2155 | kunmap_atomic(kaddr, KM_USER0); | |
2bacc55c MT |
2156 | kvm_release_page_dirty(page); |
2157 | } | |
3200f405 | 2158 | emul_write: |
2bacc55c MT |
2159 | #endif |
2160 | ||
bbd9b64e CO |
2161 | return emulator_write_emulated(addr, new, bytes, vcpu); |
2162 | } | |
2163 | ||
2164 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) | |
2165 | { | |
2166 | return kvm_x86_ops->get_segment_base(vcpu, seg); | |
2167 | } | |
2168 | ||
2169 | int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address) | |
2170 | { | |
a7052897 | 2171 | kvm_mmu_invlpg(vcpu, address); |
bbd9b64e CO |
2172 | return X86EMUL_CONTINUE; |
2173 | } | |
2174 | ||
2175 | int emulate_clts(struct kvm_vcpu *vcpu) | |
2176 | { | |
54e445ca | 2177 | KVMTRACE_0D(CLTS, vcpu, handler); |
ad312c7c | 2178 | kvm_x86_ops->set_cr0(vcpu, vcpu->arch.cr0 & ~X86_CR0_TS); |
bbd9b64e CO |
2179 | return X86EMUL_CONTINUE; |
2180 | } | |
2181 | ||
2182 | int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest) | |
2183 | { | |
2184 | struct kvm_vcpu *vcpu = ctxt->vcpu; | |
2185 | ||
2186 | switch (dr) { | |
2187 | case 0 ... 3: | |
2188 | *dest = kvm_x86_ops->get_dr(vcpu, dr); | |
2189 | return X86EMUL_CONTINUE; | |
2190 | default: | |
b8688d51 | 2191 | pr_unimpl(vcpu, "%s: unexpected dr %u\n", __func__, dr); |
bbd9b64e CO |
2192 | return X86EMUL_UNHANDLEABLE; |
2193 | } | |
2194 | } | |
2195 | ||
2196 | int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value) | |
2197 | { | |
2198 | unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U; | |
2199 | int exception; | |
2200 | ||
2201 | kvm_x86_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception); | |
2202 | if (exception) { | |
2203 | /* FIXME: better handling */ | |
2204 | return X86EMUL_UNHANDLEABLE; | |
2205 | } | |
2206 | return X86EMUL_CONTINUE; | |
2207 | } | |
2208 | ||
2209 | void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context) | |
2210 | { | |
bbd9b64e | 2211 | u8 opcodes[4]; |
5fdbf976 | 2212 | unsigned long rip = kvm_rip_read(vcpu); |
bbd9b64e CO |
2213 | unsigned long rip_linear; |
2214 | ||
f76c710d | 2215 | if (!printk_ratelimit()) |
bbd9b64e CO |
2216 | return; |
2217 | ||
25be4608 GC |
2218 | rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS); |
2219 | ||
bbd9b64e CO |
2220 | emulator_read_std(rip_linear, (void *)opcodes, 4, vcpu); |
2221 | ||
2222 | printk(KERN_ERR "emulation failed (%s) rip %lx %02x %02x %02x %02x\n", | |
2223 | context, rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]); | |
bbd9b64e CO |
2224 | } |
2225 | EXPORT_SYMBOL_GPL(kvm_report_emulation_failure); | |
2226 | ||
14af3f3c | 2227 | static struct x86_emulate_ops emulate_ops = { |
bbd9b64e | 2228 | .read_std = emulator_read_std, |
bbd9b64e CO |
2229 | .read_emulated = emulator_read_emulated, |
2230 | .write_emulated = emulator_write_emulated, | |
2231 | .cmpxchg_emulated = emulator_cmpxchg_emulated, | |
2232 | }; | |
2233 | ||
5fdbf976 MT |
2234 | static void cache_all_regs(struct kvm_vcpu *vcpu) |
2235 | { | |
2236 | kvm_register_read(vcpu, VCPU_REGS_RAX); | |
2237 | kvm_register_read(vcpu, VCPU_REGS_RSP); | |
2238 | kvm_register_read(vcpu, VCPU_REGS_RIP); | |
2239 | vcpu->arch.regs_dirty = ~0; | |
2240 | } | |
2241 | ||
bbd9b64e CO |
2242 | int emulate_instruction(struct kvm_vcpu *vcpu, |
2243 | struct kvm_run *run, | |
2244 | unsigned long cr2, | |
2245 | u16 error_code, | |
571008da | 2246 | int emulation_type) |
bbd9b64e CO |
2247 | { |
2248 | int r; | |
571008da | 2249 | struct decode_cache *c; |
bbd9b64e | 2250 | |
26eef70c | 2251 | kvm_clear_exception_queue(vcpu); |
ad312c7c | 2252 | vcpu->arch.mmio_fault_cr2 = cr2; |
5fdbf976 MT |
2253 | /* |
2254 | * TODO: fix x86_emulate.c to use guest_read/write_register | |
2255 | * instead of direct ->regs accesses, can save hundred cycles | |
2256 | * on Intel for instructions that don't read/change RSP, for | |
2257 | * for example. | |
2258 | */ | |
2259 | cache_all_regs(vcpu); | |
bbd9b64e CO |
2260 | |
2261 | vcpu->mmio_is_write = 0; | |
ad312c7c | 2262 | vcpu->arch.pio.string = 0; |
bbd9b64e | 2263 | |
571008da | 2264 | if (!(emulation_type & EMULTYPE_NO_DECODE)) { |
bbd9b64e CO |
2265 | int cs_db, cs_l; |
2266 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
2267 | ||
ad312c7c ZX |
2268 | vcpu->arch.emulate_ctxt.vcpu = vcpu; |
2269 | vcpu->arch.emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu); | |
2270 | vcpu->arch.emulate_ctxt.mode = | |
2271 | (vcpu->arch.emulate_ctxt.eflags & X86_EFLAGS_VM) | |
bbd9b64e CO |
2272 | ? X86EMUL_MODE_REAL : cs_l |
2273 | ? X86EMUL_MODE_PROT64 : cs_db | |
2274 | ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16; | |
2275 | ||
ad312c7c | 2276 | r = x86_decode_insn(&vcpu->arch.emulate_ctxt, &emulate_ops); |
571008da SY |
2277 | |
2278 | /* Reject the instructions other than VMCALL/VMMCALL when | |
2279 | * try to emulate invalid opcode */ | |
2280 | c = &vcpu->arch.emulate_ctxt.decode; | |
2281 | if ((emulation_type & EMULTYPE_TRAP_UD) && | |
2282 | (!(c->twobyte && c->b == 0x01 && | |
2283 | (c->modrm_reg == 0 || c->modrm_reg == 3) && | |
2284 | c->modrm_mod == 3 && c->modrm_rm == 1))) | |
2285 | return EMULATE_FAIL; | |
2286 | ||
f2b5756b | 2287 | ++vcpu->stat.insn_emulation; |
bbd9b64e | 2288 | if (r) { |
f2b5756b | 2289 | ++vcpu->stat.insn_emulation_fail; |
bbd9b64e CO |
2290 | if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) |
2291 | return EMULATE_DONE; | |
2292 | return EMULATE_FAIL; | |
2293 | } | |
2294 | } | |
2295 | ||
ad312c7c | 2296 | r = x86_emulate_insn(&vcpu->arch.emulate_ctxt, &emulate_ops); |
bbd9b64e | 2297 | |
ad312c7c | 2298 | if (vcpu->arch.pio.string) |
bbd9b64e CO |
2299 | return EMULATE_DO_MMIO; |
2300 | ||
2301 | if ((r || vcpu->mmio_is_write) && run) { | |
2302 | run->exit_reason = KVM_EXIT_MMIO; | |
2303 | run->mmio.phys_addr = vcpu->mmio_phys_addr; | |
2304 | memcpy(run->mmio.data, vcpu->mmio_data, 8); | |
2305 | run->mmio.len = vcpu->mmio_size; | |
2306 | run->mmio.is_write = vcpu->mmio_is_write; | |
2307 | } | |
2308 | ||
2309 | if (r) { | |
2310 | if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) | |
2311 | return EMULATE_DONE; | |
2312 | if (!vcpu->mmio_needed) { | |
2313 | kvm_report_emulation_failure(vcpu, "mmio"); | |
2314 | return EMULATE_FAIL; | |
2315 | } | |
2316 | return EMULATE_DO_MMIO; | |
2317 | } | |
2318 | ||
ad312c7c | 2319 | kvm_x86_ops->set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags); |
bbd9b64e CO |
2320 | |
2321 | if (vcpu->mmio_is_write) { | |
2322 | vcpu->mmio_needed = 0; | |
2323 | return EMULATE_DO_MMIO; | |
2324 | } | |
2325 | ||
2326 | return EMULATE_DONE; | |
2327 | } | |
2328 | EXPORT_SYMBOL_GPL(emulate_instruction); | |
2329 | ||
de7d789a CO |
2330 | static void free_pio_guest_pages(struct kvm_vcpu *vcpu) |
2331 | { | |
2332 | int i; | |
2333 | ||
ad312c7c ZX |
2334 | for (i = 0; i < ARRAY_SIZE(vcpu->arch.pio.guest_pages); ++i) |
2335 | if (vcpu->arch.pio.guest_pages[i]) { | |
2336 | kvm_release_page_dirty(vcpu->arch.pio.guest_pages[i]); | |
2337 | vcpu->arch.pio.guest_pages[i] = NULL; | |
de7d789a CO |
2338 | } |
2339 | } | |
2340 | ||
2341 | static int pio_copy_data(struct kvm_vcpu *vcpu) | |
2342 | { | |
ad312c7c | 2343 | void *p = vcpu->arch.pio_data; |
de7d789a CO |
2344 | void *q; |
2345 | unsigned bytes; | |
ad312c7c | 2346 | int nr_pages = vcpu->arch.pio.guest_pages[1] ? 2 : 1; |
de7d789a | 2347 | |
ad312c7c | 2348 | q = vmap(vcpu->arch.pio.guest_pages, nr_pages, VM_READ|VM_WRITE, |
de7d789a CO |
2349 | PAGE_KERNEL); |
2350 | if (!q) { | |
2351 | free_pio_guest_pages(vcpu); | |
2352 | return -ENOMEM; | |
2353 | } | |
ad312c7c ZX |
2354 | q += vcpu->arch.pio.guest_page_offset; |
2355 | bytes = vcpu->arch.pio.size * vcpu->arch.pio.cur_count; | |
2356 | if (vcpu->arch.pio.in) | |
de7d789a CO |
2357 | memcpy(q, p, bytes); |
2358 | else | |
2359 | memcpy(p, q, bytes); | |
ad312c7c | 2360 | q -= vcpu->arch.pio.guest_page_offset; |
de7d789a CO |
2361 | vunmap(q); |
2362 | free_pio_guest_pages(vcpu); | |
2363 | return 0; | |
2364 | } | |
2365 | ||
2366 | int complete_pio(struct kvm_vcpu *vcpu) | |
2367 | { | |
ad312c7c | 2368 | struct kvm_pio_request *io = &vcpu->arch.pio; |
de7d789a CO |
2369 | long delta; |
2370 | int r; | |
5fdbf976 | 2371 | unsigned long val; |
de7d789a CO |
2372 | |
2373 | if (!io->string) { | |
5fdbf976 MT |
2374 | if (io->in) { |
2375 | val = kvm_register_read(vcpu, VCPU_REGS_RAX); | |
2376 | memcpy(&val, vcpu->arch.pio_data, io->size); | |
2377 | kvm_register_write(vcpu, VCPU_REGS_RAX, val); | |
2378 | } | |
de7d789a CO |
2379 | } else { |
2380 | if (io->in) { | |
2381 | r = pio_copy_data(vcpu); | |
5fdbf976 | 2382 | if (r) |
de7d789a | 2383 | return r; |
de7d789a CO |
2384 | } |
2385 | ||
2386 | delta = 1; | |
2387 | if (io->rep) { | |
2388 | delta *= io->cur_count; | |
2389 | /* | |
2390 | * The size of the register should really depend on | |
2391 | * current address size. | |
2392 | */ | |
5fdbf976 MT |
2393 | val = kvm_register_read(vcpu, VCPU_REGS_RCX); |
2394 | val -= delta; | |
2395 | kvm_register_write(vcpu, VCPU_REGS_RCX, val); | |
de7d789a CO |
2396 | } |
2397 | if (io->down) | |
2398 | delta = -delta; | |
2399 | delta *= io->size; | |
5fdbf976 MT |
2400 | if (io->in) { |
2401 | val = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
2402 | val += delta; | |
2403 | kvm_register_write(vcpu, VCPU_REGS_RDI, val); | |
2404 | } else { | |
2405 | val = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
2406 | val += delta; | |
2407 | kvm_register_write(vcpu, VCPU_REGS_RSI, val); | |
2408 | } | |
de7d789a CO |
2409 | } |
2410 | ||
de7d789a CO |
2411 | io->count -= io->cur_count; |
2412 | io->cur_count = 0; | |
2413 | ||
2414 | return 0; | |
2415 | } | |
2416 | ||
2417 | static void kernel_pio(struct kvm_io_device *pio_dev, | |
2418 | struct kvm_vcpu *vcpu, | |
2419 | void *pd) | |
2420 | { | |
2421 | /* TODO: String I/O for in kernel device */ | |
2422 | ||
2423 | mutex_lock(&vcpu->kvm->lock); | |
ad312c7c ZX |
2424 | if (vcpu->arch.pio.in) |
2425 | kvm_iodevice_read(pio_dev, vcpu->arch.pio.port, | |
2426 | vcpu->arch.pio.size, | |
de7d789a CO |
2427 | pd); |
2428 | else | |
ad312c7c ZX |
2429 | kvm_iodevice_write(pio_dev, vcpu->arch.pio.port, |
2430 | vcpu->arch.pio.size, | |
de7d789a CO |
2431 | pd); |
2432 | mutex_unlock(&vcpu->kvm->lock); | |
2433 | } | |
2434 | ||
2435 | static void pio_string_write(struct kvm_io_device *pio_dev, | |
2436 | struct kvm_vcpu *vcpu) | |
2437 | { | |
ad312c7c ZX |
2438 | struct kvm_pio_request *io = &vcpu->arch.pio; |
2439 | void *pd = vcpu->arch.pio_data; | |
de7d789a CO |
2440 | int i; |
2441 | ||
2442 | mutex_lock(&vcpu->kvm->lock); | |
2443 | for (i = 0; i < io->cur_count; i++) { | |
2444 | kvm_iodevice_write(pio_dev, io->port, | |
2445 | io->size, | |
2446 | pd); | |
2447 | pd += io->size; | |
2448 | } | |
2449 | mutex_unlock(&vcpu->kvm->lock); | |
2450 | } | |
2451 | ||
2452 | static struct kvm_io_device *vcpu_find_pio_dev(struct kvm_vcpu *vcpu, | |
92760499 LV |
2453 | gpa_t addr, int len, |
2454 | int is_write) | |
de7d789a | 2455 | { |
92760499 | 2456 | return kvm_io_bus_find_dev(&vcpu->kvm->pio_bus, addr, len, is_write); |
de7d789a CO |
2457 | } |
2458 | ||
2459 | int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, | |
2460 | int size, unsigned port) | |
2461 | { | |
2462 | struct kvm_io_device *pio_dev; | |
5fdbf976 | 2463 | unsigned long val; |
de7d789a CO |
2464 | |
2465 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
2466 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; | |
ad312c7c | 2467 | vcpu->run->io.size = vcpu->arch.pio.size = size; |
de7d789a | 2468 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; |
ad312c7c ZX |
2469 | vcpu->run->io.count = vcpu->arch.pio.count = vcpu->arch.pio.cur_count = 1; |
2470 | vcpu->run->io.port = vcpu->arch.pio.port = port; | |
2471 | vcpu->arch.pio.in = in; | |
2472 | vcpu->arch.pio.string = 0; | |
2473 | vcpu->arch.pio.down = 0; | |
2474 | vcpu->arch.pio.guest_page_offset = 0; | |
2475 | vcpu->arch.pio.rep = 0; | |
de7d789a | 2476 | |
2714d1d3 FEL |
2477 | if (vcpu->run->io.direction == KVM_EXIT_IO_IN) |
2478 | KVMTRACE_2D(IO_READ, vcpu, vcpu->run->io.port, (u32)size, | |
2479 | handler); | |
2480 | else | |
2481 | KVMTRACE_2D(IO_WRITE, vcpu, vcpu->run->io.port, (u32)size, | |
2482 | handler); | |
2483 | ||
5fdbf976 MT |
2484 | val = kvm_register_read(vcpu, VCPU_REGS_RAX); |
2485 | memcpy(vcpu->arch.pio_data, &val, 4); | |
de7d789a | 2486 | |
92760499 | 2487 | pio_dev = vcpu_find_pio_dev(vcpu, port, size, !in); |
de7d789a | 2488 | if (pio_dev) { |
ad312c7c | 2489 | kernel_pio(pio_dev, vcpu, vcpu->arch.pio_data); |
de7d789a CO |
2490 | complete_pio(vcpu); |
2491 | return 1; | |
2492 | } | |
2493 | return 0; | |
2494 | } | |
2495 | EXPORT_SYMBOL_GPL(kvm_emulate_pio); | |
2496 | ||
2497 | int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, | |
2498 | int size, unsigned long count, int down, | |
2499 | gva_t address, int rep, unsigned port) | |
2500 | { | |
2501 | unsigned now, in_page; | |
2502 | int i, ret = 0; | |
2503 | int nr_pages = 1; | |
2504 | struct page *page; | |
2505 | struct kvm_io_device *pio_dev; | |
2506 | ||
2507 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
2508 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; | |
ad312c7c | 2509 | vcpu->run->io.size = vcpu->arch.pio.size = size; |
de7d789a | 2510 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; |
ad312c7c ZX |
2511 | vcpu->run->io.count = vcpu->arch.pio.count = vcpu->arch.pio.cur_count = count; |
2512 | vcpu->run->io.port = vcpu->arch.pio.port = port; | |
2513 | vcpu->arch.pio.in = in; | |
2514 | vcpu->arch.pio.string = 1; | |
2515 | vcpu->arch.pio.down = down; | |
2516 | vcpu->arch.pio.guest_page_offset = offset_in_page(address); | |
2517 | vcpu->arch.pio.rep = rep; | |
de7d789a | 2518 | |
2714d1d3 FEL |
2519 | if (vcpu->run->io.direction == KVM_EXIT_IO_IN) |
2520 | KVMTRACE_2D(IO_READ, vcpu, vcpu->run->io.port, (u32)size, | |
2521 | handler); | |
2522 | else | |
2523 | KVMTRACE_2D(IO_WRITE, vcpu, vcpu->run->io.port, (u32)size, | |
2524 | handler); | |
2525 | ||
de7d789a CO |
2526 | if (!count) { |
2527 | kvm_x86_ops->skip_emulated_instruction(vcpu); | |
2528 | return 1; | |
2529 | } | |
2530 | ||
2531 | if (!down) | |
2532 | in_page = PAGE_SIZE - offset_in_page(address); | |
2533 | else | |
2534 | in_page = offset_in_page(address) + size; | |
2535 | now = min(count, (unsigned long)in_page / size); | |
2536 | if (!now) { | |
2537 | /* | |
2538 | * String I/O straddles page boundary. Pin two guest pages | |
2539 | * so that we satisfy atomicity constraints. Do just one | |
2540 | * transaction to avoid complexity. | |
2541 | */ | |
2542 | nr_pages = 2; | |
2543 | now = 1; | |
2544 | } | |
2545 | if (down) { | |
2546 | /* | |
2547 | * String I/O in reverse. Yuck. Kill the guest, fix later. | |
2548 | */ | |
2549 | pr_unimpl(vcpu, "guest string pio down\n"); | |
c1a5d4f9 | 2550 | kvm_inject_gp(vcpu, 0); |
de7d789a CO |
2551 | return 1; |
2552 | } | |
2553 | vcpu->run->io.count = now; | |
ad312c7c | 2554 | vcpu->arch.pio.cur_count = now; |
de7d789a | 2555 | |
ad312c7c | 2556 | if (vcpu->arch.pio.cur_count == vcpu->arch.pio.count) |
de7d789a CO |
2557 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
2558 | ||
2559 | for (i = 0; i < nr_pages; ++i) { | |
de7d789a | 2560 | page = gva_to_page(vcpu, address + i * PAGE_SIZE); |
ad312c7c | 2561 | vcpu->arch.pio.guest_pages[i] = page; |
de7d789a | 2562 | if (!page) { |
c1a5d4f9 | 2563 | kvm_inject_gp(vcpu, 0); |
de7d789a CO |
2564 | free_pio_guest_pages(vcpu); |
2565 | return 1; | |
2566 | } | |
2567 | } | |
2568 | ||
92760499 LV |
2569 | pio_dev = vcpu_find_pio_dev(vcpu, port, |
2570 | vcpu->arch.pio.cur_count, | |
2571 | !vcpu->arch.pio.in); | |
ad312c7c | 2572 | if (!vcpu->arch.pio.in) { |
de7d789a CO |
2573 | /* string PIO write */ |
2574 | ret = pio_copy_data(vcpu); | |
2575 | if (ret >= 0 && pio_dev) { | |
2576 | pio_string_write(pio_dev, vcpu); | |
2577 | complete_pio(vcpu); | |
ad312c7c | 2578 | if (vcpu->arch.pio.count == 0) |
de7d789a CO |
2579 | ret = 1; |
2580 | } | |
2581 | } else if (pio_dev) | |
2582 | pr_unimpl(vcpu, "no string pio read support yet, " | |
2583 | "port %x size %d count %ld\n", | |
2584 | port, size, count); | |
2585 | ||
2586 | return ret; | |
2587 | } | |
2588 | EXPORT_SYMBOL_GPL(kvm_emulate_pio_string); | |
2589 | ||
f8c16bba | 2590 | int kvm_arch_init(void *opaque) |
043405e1 | 2591 | { |
56c6d28a | 2592 | int r; |
f8c16bba ZX |
2593 | struct kvm_x86_ops *ops = (struct kvm_x86_ops *)opaque; |
2594 | ||
f8c16bba ZX |
2595 | if (kvm_x86_ops) { |
2596 | printk(KERN_ERR "kvm: already loaded the other module\n"); | |
56c6d28a ZX |
2597 | r = -EEXIST; |
2598 | goto out; | |
f8c16bba ZX |
2599 | } |
2600 | ||
2601 | if (!ops->cpu_has_kvm_support()) { | |
2602 | printk(KERN_ERR "kvm: no hardware support\n"); | |
56c6d28a ZX |
2603 | r = -EOPNOTSUPP; |
2604 | goto out; | |
f8c16bba ZX |
2605 | } |
2606 | if (ops->disabled_by_bios()) { | |
2607 | printk(KERN_ERR "kvm: disabled by bios\n"); | |
56c6d28a ZX |
2608 | r = -EOPNOTSUPP; |
2609 | goto out; | |
f8c16bba ZX |
2610 | } |
2611 | ||
97db56ce AK |
2612 | r = kvm_mmu_module_init(); |
2613 | if (r) | |
2614 | goto out; | |
2615 | ||
2616 | kvm_init_msr_list(); | |
2617 | ||
f8c16bba | 2618 | kvm_x86_ops = ops; |
56c6d28a | 2619 | kvm_mmu_set_nonpresent_ptes(0ull, 0ull); |
7b52345e SY |
2620 | kvm_mmu_set_base_ptes(PT_PRESENT_MASK); |
2621 | kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK, | |
64d4d521 | 2622 | PT_DIRTY_MASK, PT64_NX_MASK, 0, 0); |
f8c16bba | 2623 | return 0; |
56c6d28a ZX |
2624 | |
2625 | out: | |
56c6d28a | 2626 | return r; |
043405e1 | 2627 | } |
8776e519 | 2628 | |
f8c16bba ZX |
2629 | void kvm_arch_exit(void) |
2630 | { | |
2631 | kvm_x86_ops = NULL; | |
56c6d28a ZX |
2632 | kvm_mmu_module_exit(); |
2633 | } | |
f8c16bba | 2634 | |
8776e519 HB |
2635 | int kvm_emulate_halt(struct kvm_vcpu *vcpu) |
2636 | { | |
2637 | ++vcpu->stat.halt_exits; | |
2714d1d3 | 2638 | KVMTRACE_0D(HLT, vcpu, handler); |
8776e519 | 2639 | if (irqchip_in_kernel(vcpu->kvm)) { |
a4535290 | 2640 | vcpu->arch.mp_state = KVM_MP_STATE_HALTED; |
8776e519 HB |
2641 | return 1; |
2642 | } else { | |
2643 | vcpu->run->exit_reason = KVM_EXIT_HLT; | |
2644 | return 0; | |
2645 | } | |
2646 | } | |
2647 | EXPORT_SYMBOL_GPL(kvm_emulate_halt); | |
2648 | ||
2f333bcb MT |
2649 | static inline gpa_t hc_gpa(struct kvm_vcpu *vcpu, unsigned long a0, |
2650 | unsigned long a1) | |
2651 | { | |
2652 | if (is_long_mode(vcpu)) | |
2653 | return a0; | |
2654 | else | |
2655 | return a0 | ((gpa_t)a1 << 32); | |
2656 | } | |
2657 | ||
8776e519 HB |
2658 | int kvm_emulate_hypercall(struct kvm_vcpu *vcpu) |
2659 | { | |
2660 | unsigned long nr, a0, a1, a2, a3, ret; | |
2f333bcb | 2661 | int r = 1; |
8776e519 | 2662 | |
5fdbf976 MT |
2663 | nr = kvm_register_read(vcpu, VCPU_REGS_RAX); |
2664 | a0 = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
2665 | a1 = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
2666 | a2 = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
2667 | a3 = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
8776e519 | 2668 | |
2714d1d3 FEL |
2669 | KVMTRACE_1D(VMMCALL, vcpu, (u32)nr, handler); |
2670 | ||
8776e519 HB |
2671 | if (!is_long_mode(vcpu)) { |
2672 | nr &= 0xFFFFFFFF; | |
2673 | a0 &= 0xFFFFFFFF; | |
2674 | a1 &= 0xFFFFFFFF; | |
2675 | a2 &= 0xFFFFFFFF; | |
2676 | a3 &= 0xFFFFFFFF; | |
2677 | } | |
2678 | ||
2679 | switch (nr) { | |
b93463aa AK |
2680 | case KVM_HC_VAPIC_POLL_IRQ: |
2681 | ret = 0; | |
2682 | break; | |
2f333bcb MT |
2683 | case KVM_HC_MMU_OP: |
2684 | r = kvm_pv_mmu_op(vcpu, a0, hc_gpa(vcpu, a1, a2), &ret); | |
2685 | break; | |
8776e519 HB |
2686 | default: |
2687 | ret = -KVM_ENOSYS; | |
2688 | break; | |
2689 | } | |
5fdbf976 | 2690 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); |
f11c3a8d | 2691 | ++vcpu->stat.hypercalls; |
2f333bcb | 2692 | return r; |
8776e519 HB |
2693 | } |
2694 | EXPORT_SYMBOL_GPL(kvm_emulate_hypercall); | |
2695 | ||
2696 | int kvm_fix_hypercall(struct kvm_vcpu *vcpu) | |
2697 | { | |
2698 | char instruction[3]; | |
2699 | int ret = 0; | |
5fdbf976 | 2700 | unsigned long rip = kvm_rip_read(vcpu); |
8776e519 | 2701 | |
8776e519 HB |
2702 | |
2703 | /* | |
2704 | * Blow out the MMU to ensure that no other VCPU has an active mapping | |
2705 | * to ensure that the updated hypercall appears atomically across all | |
2706 | * VCPUs. | |
2707 | */ | |
2708 | kvm_mmu_zap_all(vcpu->kvm); | |
2709 | ||
8776e519 | 2710 | kvm_x86_ops->patch_hypercall(vcpu, instruction); |
5fdbf976 | 2711 | if (emulator_write_emulated(rip, instruction, 3, vcpu) |
8776e519 HB |
2712 | != X86EMUL_CONTINUE) |
2713 | ret = -EFAULT; | |
2714 | ||
8776e519 HB |
2715 | return ret; |
2716 | } | |
2717 | ||
2718 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) | |
2719 | { | |
2720 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; | |
2721 | } | |
2722 | ||
2723 | void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
2724 | { | |
2725 | struct descriptor_table dt = { limit, base }; | |
2726 | ||
2727 | kvm_x86_ops->set_gdt(vcpu, &dt); | |
2728 | } | |
2729 | ||
2730 | void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
2731 | { | |
2732 | struct descriptor_table dt = { limit, base }; | |
2733 | ||
2734 | kvm_x86_ops->set_idt(vcpu, &dt); | |
2735 | } | |
2736 | ||
2737 | void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw, | |
2738 | unsigned long *rflags) | |
2739 | { | |
2d3ad1f4 | 2740 | kvm_lmsw(vcpu, msw); |
8776e519 HB |
2741 | *rflags = kvm_x86_ops->get_rflags(vcpu); |
2742 | } | |
2743 | ||
2744 | unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr) | |
2745 | { | |
54e445ca JR |
2746 | unsigned long value; |
2747 | ||
8776e519 HB |
2748 | kvm_x86_ops->decache_cr4_guest_bits(vcpu); |
2749 | switch (cr) { | |
2750 | case 0: | |
54e445ca JR |
2751 | value = vcpu->arch.cr0; |
2752 | break; | |
8776e519 | 2753 | case 2: |
54e445ca JR |
2754 | value = vcpu->arch.cr2; |
2755 | break; | |
8776e519 | 2756 | case 3: |
54e445ca JR |
2757 | value = vcpu->arch.cr3; |
2758 | break; | |
8776e519 | 2759 | case 4: |
54e445ca JR |
2760 | value = vcpu->arch.cr4; |
2761 | break; | |
152ff9be | 2762 | case 8: |
54e445ca JR |
2763 | value = kvm_get_cr8(vcpu); |
2764 | break; | |
8776e519 | 2765 | default: |
b8688d51 | 2766 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr); |
8776e519 HB |
2767 | return 0; |
2768 | } | |
54e445ca JR |
2769 | KVMTRACE_3D(CR_READ, vcpu, (u32)cr, (u32)value, |
2770 | (u32)((u64)value >> 32), handler); | |
2771 | ||
2772 | return value; | |
8776e519 HB |
2773 | } |
2774 | ||
2775 | void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val, | |
2776 | unsigned long *rflags) | |
2777 | { | |
54e445ca JR |
2778 | KVMTRACE_3D(CR_WRITE, vcpu, (u32)cr, (u32)val, |
2779 | (u32)((u64)val >> 32), handler); | |
2780 | ||
8776e519 HB |
2781 | switch (cr) { |
2782 | case 0: | |
2d3ad1f4 | 2783 | kvm_set_cr0(vcpu, mk_cr_64(vcpu->arch.cr0, val)); |
8776e519 HB |
2784 | *rflags = kvm_x86_ops->get_rflags(vcpu); |
2785 | break; | |
2786 | case 2: | |
ad312c7c | 2787 | vcpu->arch.cr2 = val; |
8776e519 HB |
2788 | break; |
2789 | case 3: | |
2d3ad1f4 | 2790 | kvm_set_cr3(vcpu, val); |
8776e519 HB |
2791 | break; |
2792 | case 4: | |
2d3ad1f4 | 2793 | kvm_set_cr4(vcpu, mk_cr_64(vcpu->arch.cr4, val)); |
8776e519 | 2794 | break; |
152ff9be | 2795 | case 8: |
2d3ad1f4 | 2796 | kvm_set_cr8(vcpu, val & 0xfUL); |
152ff9be | 2797 | break; |
8776e519 | 2798 | default: |
b8688d51 | 2799 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr); |
8776e519 HB |
2800 | } |
2801 | } | |
2802 | ||
07716717 DK |
2803 | static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu *vcpu, int i) |
2804 | { | |
ad312c7c ZX |
2805 | struct kvm_cpuid_entry2 *e = &vcpu->arch.cpuid_entries[i]; |
2806 | int j, nent = vcpu->arch.cpuid_nent; | |
07716717 DK |
2807 | |
2808 | e->flags &= ~KVM_CPUID_FLAG_STATE_READ_NEXT; | |
2809 | /* when no next entry is found, the current entry[i] is reselected */ | |
0fdf8e59 | 2810 | for (j = i + 1; ; j = (j + 1) % nent) { |
ad312c7c | 2811 | struct kvm_cpuid_entry2 *ej = &vcpu->arch.cpuid_entries[j]; |
07716717 DK |
2812 | if (ej->function == e->function) { |
2813 | ej->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT; | |
2814 | return j; | |
2815 | } | |
2816 | } | |
2817 | return 0; /* silence gcc, even though control never reaches here */ | |
2818 | } | |
2819 | ||
2820 | /* find an entry with matching function, matching index (if needed), and that | |
2821 | * should be read next (if it's stateful) */ | |
2822 | static int is_matching_cpuid_entry(struct kvm_cpuid_entry2 *e, | |
2823 | u32 function, u32 index) | |
2824 | { | |
2825 | if (e->function != function) | |
2826 | return 0; | |
2827 | if ((e->flags & KVM_CPUID_FLAG_SIGNIFCANT_INDEX) && e->index != index) | |
2828 | return 0; | |
2829 | if ((e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) && | |
2830 | !(e->flags & KVM_CPUID_FLAG_STATE_READ_NEXT)) | |
2831 | return 0; | |
2832 | return 1; | |
2833 | } | |
2834 | ||
8776e519 HB |
2835 | void kvm_emulate_cpuid(struct kvm_vcpu *vcpu) |
2836 | { | |
2837 | int i; | |
07716717 DK |
2838 | u32 function, index; |
2839 | struct kvm_cpuid_entry2 *e, *best; | |
8776e519 | 2840 | |
5fdbf976 MT |
2841 | function = kvm_register_read(vcpu, VCPU_REGS_RAX); |
2842 | index = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
2843 | kvm_register_write(vcpu, VCPU_REGS_RAX, 0); | |
2844 | kvm_register_write(vcpu, VCPU_REGS_RBX, 0); | |
2845 | kvm_register_write(vcpu, VCPU_REGS_RCX, 0); | |
2846 | kvm_register_write(vcpu, VCPU_REGS_RDX, 0); | |
8776e519 | 2847 | best = NULL; |
ad312c7c ZX |
2848 | for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { |
2849 | e = &vcpu->arch.cpuid_entries[i]; | |
07716717 DK |
2850 | if (is_matching_cpuid_entry(e, function, index)) { |
2851 | if (e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) | |
2852 | move_to_next_stateful_cpuid_entry(vcpu, i); | |
8776e519 HB |
2853 | best = e; |
2854 | break; | |
2855 | } | |
2856 | /* | |
2857 | * Both basic or both extended? | |
2858 | */ | |
2859 | if (((e->function ^ function) & 0x80000000) == 0) | |
2860 | if (!best || e->function > best->function) | |
2861 | best = e; | |
2862 | } | |
2863 | if (best) { | |
5fdbf976 MT |
2864 | kvm_register_write(vcpu, VCPU_REGS_RAX, best->eax); |
2865 | kvm_register_write(vcpu, VCPU_REGS_RBX, best->ebx); | |
2866 | kvm_register_write(vcpu, VCPU_REGS_RCX, best->ecx); | |
2867 | kvm_register_write(vcpu, VCPU_REGS_RDX, best->edx); | |
8776e519 | 2868 | } |
8776e519 | 2869 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
2714d1d3 | 2870 | KVMTRACE_5D(CPUID, vcpu, function, |
5fdbf976 MT |
2871 | (u32)kvm_register_read(vcpu, VCPU_REGS_RAX), |
2872 | (u32)kvm_register_read(vcpu, VCPU_REGS_RBX), | |
2873 | (u32)kvm_register_read(vcpu, VCPU_REGS_RCX), | |
2874 | (u32)kvm_register_read(vcpu, VCPU_REGS_RDX), handler); | |
8776e519 HB |
2875 | } |
2876 | EXPORT_SYMBOL_GPL(kvm_emulate_cpuid); | |
d0752060 | 2877 | |
b6c7a5dc HB |
2878 | /* |
2879 | * Check if userspace requested an interrupt window, and that the | |
2880 | * interrupt window is open. | |
2881 | * | |
2882 | * No need to exit to userspace if we already have an interrupt queued. | |
2883 | */ | |
2884 | static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu, | |
2885 | struct kvm_run *kvm_run) | |
2886 | { | |
ad312c7c | 2887 | return (!vcpu->arch.irq_summary && |
b6c7a5dc | 2888 | kvm_run->request_interrupt_window && |
ad312c7c | 2889 | vcpu->arch.interrupt_window_open && |
b6c7a5dc HB |
2890 | (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF)); |
2891 | } | |
2892 | ||
2893 | static void post_kvm_run_save(struct kvm_vcpu *vcpu, | |
2894 | struct kvm_run *kvm_run) | |
2895 | { | |
2896 | kvm_run->if_flag = (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF) != 0; | |
2d3ad1f4 | 2897 | kvm_run->cr8 = kvm_get_cr8(vcpu); |
b6c7a5dc | 2898 | kvm_run->apic_base = kvm_get_apic_base(vcpu); |
4531220b | 2899 | if (irqchip_in_kernel(vcpu->kvm)) |
b6c7a5dc | 2900 | kvm_run->ready_for_interrupt_injection = 1; |
4531220b | 2901 | else |
b6c7a5dc | 2902 | kvm_run->ready_for_interrupt_injection = |
ad312c7c ZX |
2903 | (vcpu->arch.interrupt_window_open && |
2904 | vcpu->arch.irq_summary == 0); | |
b6c7a5dc HB |
2905 | } |
2906 | ||
b93463aa AK |
2907 | static void vapic_enter(struct kvm_vcpu *vcpu) |
2908 | { | |
2909 | struct kvm_lapic *apic = vcpu->arch.apic; | |
2910 | struct page *page; | |
2911 | ||
2912 | if (!apic || !apic->vapic_addr) | |
2913 | return; | |
2914 | ||
2915 | page = gfn_to_page(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); | |
72dc67a6 IE |
2916 | |
2917 | vcpu->arch.apic->vapic_page = page; | |
b93463aa AK |
2918 | } |
2919 | ||
2920 | static void vapic_exit(struct kvm_vcpu *vcpu) | |
2921 | { | |
2922 | struct kvm_lapic *apic = vcpu->arch.apic; | |
2923 | ||
2924 | if (!apic || !apic->vapic_addr) | |
2925 | return; | |
2926 | ||
f8b78fa3 | 2927 | down_read(&vcpu->kvm->slots_lock); |
b93463aa AK |
2928 | kvm_release_page_dirty(apic->vapic_page); |
2929 | mark_page_dirty(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); | |
f8b78fa3 | 2930 | up_read(&vcpu->kvm->slots_lock); |
b93463aa AK |
2931 | } |
2932 | ||
d7690175 | 2933 | static int vcpu_enter_guest(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
b6c7a5dc HB |
2934 | { |
2935 | int r; | |
2936 | ||
2e53d63a MT |
2937 | if (vcpu->requests) |
2938 | if (test_and_clear_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests)) | |
2939 | kvm_mmu_unload(vcpu); | |
2940 | ||
b6c7a5dc HB |
2941 | r = kvm_mmu_reload(vcpu); |
2942 | if (unlikely(r)) | |
2943 | goto out; | |
2944 | ||
2f52d58c AK |
2945 | if (vcpu->requests) { |
2946 | if (test_and_clear_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests)) | |
2f599714 | 2947 | __kvm_migrate_timers(vcpu); |
4731d4c7 MT |
2948 | if (test_and_clear_bit(KVM_REQ_MMU_SYNC, &vcpu->requests)) |
2949 | kvm_mmu_sync_roots(vcpu); | |
d4acf7e7 MT |
2950 | if (test_and_clear_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests)) |
2951 | kvm_x86_ops->tlb_flush(vcpu); | |
b93463aa AK |
2952 | if (test_and_clear_bit(KVM_REQ_REPORT_TPR_ACCESS, |
2953 | &vcpu->requests)) { | |
2954 | kvm_run->exit_reason = KVM_EXIT_TPR_ACCESS; | |
2955 | r = 0; | |
2956 | goto out; | |
2957 | } | |
71c4dfaf JR |
2958 | if (test_and_clear_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests)) { |
2959 | kvm_run->exit_reason = KVM_EXIT_SHUTDOWN; | |
2960 | r = 0; | |
2961 | goto out; | |
2962 | } | |
2f52d58c | 2963 | } |
b93463aa | 2964 | |
06e05645 | 2965 | clear_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests); |
b6c7a5dc HB |
2966 | kvm_inject_pending_timer_irqs(vcpu); |
2967 | ||
2968 | preempt_disable(); | |
2969 | ||
2970 | kvm_x86_ops->prepare_guest_switch(vcpu); | |
2971 | kvm_load_guest_fpu(vcpu); | |
2972 | ||
2973 | local_irq_disable(); | |
2974 | ||
d7690175 | 2975 | if (vcpu->requests || need_resched() || signal_pending(current)) { |
6c142801 AK |
2976 | local_irq_enable(); |
2977 | preempt_enable(); | |
2978 | r = 1; | |
2979 | goto out; | |
2980 | } | |
2981 | ||
29415c37 MT |
2982 | if (vcpu->guest_debug.enabled) |
2983 | kvm_x86_ops->guest_debug_pre(vcpu); | |
b6c7a5dc | 2984 | |
e9571ed5 MT |
2985 | vcpu->guest_mode = 1; |
2986 | /* | |
2987 | * Make sure that guest_mode assignment won't happen after | |
2988 | * testing the pending IRQ vector bitmap. | |
2989 | */ | |
2990 | smp_wmb(); | |
2991 | ||
ad312c7c | 2992 | if (vcpu->arch.exception.pending) |
298101da AK |
2993 | __queue_exception(vcpu); |
2994 | else if (irqchip_in_kernel(vcpu->kvm)) | |
b6c7a5dc | 2995 | kvm_x86_ops->inject_pending_irq(vcpu); |
eb9774f0 | 2996 | else |
b6c7a5dc HB |
2997 | kvm_x86_ops->inject_pending_vectors(vcpu, kvm_run); |
2998 | ||
b93463aa AK |
2999 | kvm_lapic_sync_to_vapic(vcpu); |
3000 | ||
3200f405 MT |
3001 | up_read(&vcpu->kvm->slots_lock); |
3002 | ||
b6c7a5dc HB |
3003 | kvm_guest_enter(); |
3004 | ||
b6c7a5dc | 3005 | |
2714d1d3 | 3006 | KVMTRACE_0D(VMENTRY, vcpu, entryexit); |
b6c7a5dc HB |
3007 | kvm_x86_ops->run(vcpu, kvm_run); |
3008 | ||
3009 | vcpu->guest_mode = 0; | |
3010 | local_irq_enable(); | |
3011 | ||
3012 | ++vcpu->stat.exits; | |
3013 | ||
3014 | /* | |
3015 | * We must have an instruction between local_irq_enable() and | |
3016 | * kvm_guest_exit(), so the timer interrupt isn't delayed by | |
3017 | * the interrupt shadow. The stat.exits increment will do nicely. | |
3018 | * But we need to prevent reordering, hence this barrier(): | |
3019 | */ | |
3020 | barrier(); | |
3021 | ||
3022 | kvm_guest_exit(); | |
3023 | ||
3024 | preempt_enable(); | |
3025 | ||
3200f405 MT |
3026 | down_read(&vcpu->kvm->slots_lock); |
3027 | ||
b6c7a5dc HB |
3028 | /* |
3029 | * Profile KVM exit RIPs: | |
3030 | */ | |
3031 | if (unlikely(prof_on == KVM_PROFILING)) { | |
5fdbf976 MT |
3032 | unsigned long rip = kvm_rip_read(vcpu); |
3033 | profile_hit(KVM_PROFILING, (void *)rip); | |
b6c7a5dc HB |
3034 | } |
3035 | ||
ad312c7c ZX |
3036 | if (vcpu->arch.exception.pending && kvm_x86_ops->exception_injected(vcpu)) |
3037 | vcpu->arch.exception.pending = false; | |
298101da | 3038 | |
b93463aa AK |
3039 | kvm_lapic_sync_from_vapic(vcpu); |
3040 | ||
b6c7a5dc | 3041 | r = kvm_x86_ops->handle_exit(kvm_run, vcpu); |
d7690175 MT |
3042 | out: |
3043 | return r; | |
3044 | } | |
b6c7a5dc | 3045 | |
d7690175 MT |
3046 | static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
3047 | { | |
3048 | int r; | |
3049 | ||
3050 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED)) { | |
1b10bf31 JK |
3051 | pr_debug("vcpu %d received sipi with vector # %x\n", |
3052 | vcpu->vcpu_id, vcpu->arch.sipi_vector); | |
d7690175 | 3053 | kvm_lapic_reset(vcpu); |
5f179287 | 3054 | r = kvm_arch_vcpu_reset(vcpu); |
d7690175 MT |
3055 | if (r) |
3056 | return r; | |
3057 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; | |
b6c7a5dc HB |
3058 | } |
3059 | ||
d7690175 MT |
3060 | down_read(&vcpu->kvm->slots_lock); |
3061 | vapic_enter(vcpu); | |
3062 | ||
3063 | r = 1; | |
3064 | while (r > 0) { | |
af2152f5 | 3065 | if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE) |
d7690175 MT |
3066 | r = vcpu_enter_guest(vcpu, kvm_run); |
3067 | else { | |
3068 | up_read(&vcpu->kvm->slots_lock); | |
3069 | kvm_vcpu_block(vcpu); | |
3070 | down_read(&vcpu->kvm->slots_lock); | |
3071 | if (test_and_clear_bit(KVM_REQ_UNHALT, &vcpu->requests)) | |
3072 | if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED) | |
3073 | vcpu->arch.mp_state = | |
3074 | KVM_MP_STATE_RUNNABLE; | |
3075 | if (vcpu->arch.mp_state != KVM_MP_STATE_RUNNABLE) | |
3076 | r = -EINTR; | |
3077 | } | |
3078 | ||
3079 | if (r > 0) { | |
3080 | if (dm_request_for_irq_injection(vcpu, kvm_run)) { | |
3081 | r = -EINTR; | |
3082 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
3083 | ++vcpu->stat.request_irq_exits; | |
3084 | } | |
3085 | if (signal_pending(current)) { | |
3086 | r = -EINTR; | |
3087 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
3088 | ++vcpu->stat.signal_exits; | |
3089 | } | |
3090 | if (need_resched()) { | |
3091 | up_read(&vcpu->kvm->slots_lock); | |
3092 | kvm_resched(vcpu); | |
3093 | down_read(&vcpu->kvm->slots_lock); | |
3094 | } | |
3095 | } | |
b6c7a5dc HB |
3096 | } |
3097 | ||
d7690175 | 3098 | up_read(&vcpu->kvm->slots_lock); |
b6c7a5dc HB |
3099 | post_kvm_run_save(vcpu, kvm_run); |
3100 | ||
b93463aa AK |
3101 | vapic_exit(vcpu); |
3102 | ||
b6c7a5dc HB |
3103 | return r; |
3104 | } | |
3105 | ||
3106 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
3107 | { | |
3108 | int r; | |
3109 | sigset_t sigsaved; | |
3110 | ||
3111 | vcpu_load(vcpu); | |
3112 | ||
ac9f6dc0 AK |
3113 | if (vcpu->sigset_active) |
3114 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
3115 | ||
a4535290 | 3116 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) { |
b6c7a5dc | 3117 | kvm_vcpu_block(vcpu); |
d7690175 | 3118 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); |
ac9f6dc0 AK |
3119 | r = -EAGAIN; |
3120 | goto out; | |
b6c7a5dc HB |
3121 | } |
3122 | ||
b6c7a5dc HB |
3123 | /* re-sync apic's tpr */ |
3124 | if (!irqchip_in_kernel(vcpu->kvm)) | |
2d3ad1f4 | 3125 | kvm_set_cr8(vcpu, kvm_run->cr8); |
b6c7a5dc | 3126 | |
ad312c7c | 3127 | if (vcpu->arch.pio.cur_count) { |
b6c7a5dc HB |
3128 | r = complete_pio(vcpu); |
3129 | if (r) | |
3130 | goto out; | |
3131 | } | |
3132 | #if CONFIG_HAS_IOMEM | |
3133 | if (vcpu->mmio_needed) { | |
3134 | memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8); | |
3135 | vcpu->mmio_read_completed = 1; | |
3136 | vcpu->mmio_needed = 0; | |
3200f405 MT |
3137 | |
3138 | down_read(&vcpu->kvm->slots_lock); | |
b6c7a5dc | 3139 | r = emulate_instruction(vcpu, kvm_run, |
571008da SY |
3140 | vcpu->arch.mmio_fault_cr2, 0, |
3141 | EMULTYPE_NO_DECODE); | |
3200f405 | 3142 | up_read(&vcpu->kvm->slots_lock); |
b6c7a5dc HB |
3143 | if (r == EMULATE_DO_MMIO) { |
3144 | /* | |
3145 | * Read-modify-write. Back to userspace. | |
3146 | */ | |
3147 | r = 0; | |
3148 | goto out; | |
3149 | } | |
3150 | } | |
3151 | #endif | |
5fdbf976 MT |
3152 | if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) |
3153 | kvm_register_write(vcpu, VCPU_REGS_RAX, | |
3154 | kvm_run->hypercall.ret); | |
b6c7a5dc HB |
3155 | |
3156 | r = __vcpu_run(vcpu, kvm_run); | |
3157 | ||
3158 | out: | |
3159 | if (vcpu->sigset_active) | |
3160 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
3161 | ||
3162 | vcpu_put(vcpu); | |
3163 | return r; | |
3164 | } | |
3165 | ||
3166 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
3167 | { | |
3168 | vcpu_load(vcpu); | |
3169 | ||
5fdbf976 MT |
3170 | regs->rax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
3171 | regs->rbx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
3172 | regs->rcx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
3173 | regs->rdx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
3174 | regs->rsi = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
3175 | regs->rdi = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
3176 | regs->rsp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
3177 | regs->rbp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
b6c7a5dc | 3178 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
3179 | regs->r8 = kvm_register_read(vcpu, VCPU_REGS_R8); |
3180 | regs->r9 = kvm_register_read(vcpu, VCPU_REGS_R9); | |
3181 | regs->r10 = kvm_register_read(vcpu, VCPU_REGS_R10); | |
3182 | regs->r11 = kvm_register_read(vcpu, VCPU_REGS_R11); | |
3183 | regs->r12 = kvm_register_read(vcpu, VCPU_REGS_R12); | |
3184 | regs->r13 = kvm_register_read(vcpu, VCPU_REGS_R13); | |
3185 | regs->r14 = kvm_register_read(vcpu, VCPU_REGS_R14); | |
3186 | regs->r15 = kvm_register_read(vcpu, VCPU_REGS_R15); | |
b6c7a5dc HB |
3187 | #endif |
3188 | ||
5fdbf976 | 3189 | regs->rip = kvm_rip_read(vcpu); |
b6c7a5dc HB |
3190 | regs->rflags = kvm_x86_ops->get_rflags(vcpu); |
3191 | ||
3192 | /* | |
3193 | * Don't leak debug flags in case they were set for guest debugging | |
3194 | */ | |
3195 | if (vcpu->guest_debug.enabled && vcpu->guest_debug.singlestep) | |
3196 | regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF); | |
3197 | ||
3198 | vcpu_put(vcpu); | |
3199 | ||
3200 | return 0; | |
3201 | } | |
3202 | ||
3203 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
3204 | { | |
3205 | vcpu_load(vcpu); | |
3206 | ||
5fdbf976 MT |
3207 | kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax); |
3208 | kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx); | |
3209 | kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx); | |
3210 | kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx); | |
3211 | kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi); | |
3212 | kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi); | |
3213 | kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp); | |
3214 | kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp); | |
b6c7a5dc | 3215 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
3216 | kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8); |
3217 | kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9); | |
3218 | kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10); | |
3219 | kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11); | |
3220 | kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12); | |
3221 | kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13); | |
3222 | kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14); | |
3223 | kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15); | |
3224 | ||
b6c7a5dc HB |
3225 | #endif |
3226 | ||
5fdbf976 | 3227 | kvm_rip_write(vcpu, regs->rip); |
b6c7a5dc HB |
3228 | kvm_x86_ops->set_rflags(vcpu, regs->rflags); |
3229 | ||
b6c7a5dc | 3230 | |
b4f14abd JK |
3231 | vcpu->arch.exception.pending = false; |
3232 | ||
b6c7a5dc HB |
3233 | vcpu_put(vcpu); |
3234 | ||
3235 | return 0; | |
3236 | } | |
3237 | ||
3e6e0aab GT |
3238 | void kvm_get_segment(struct kvm_vcpu *vcpu, |
3239 | struct kvm_segment *var, int seg) | |
b6c7a5dc | 3240 | { |
14af3f3c | 3241 | kvm_x86_ops->get_segment(vcpu, var, seg); |
b6c7a5dc HB |
3242 | } |
3243 | ||
3244 | void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) | |
3245 | { | |
3246 | struct kvm_segment cs; | |
3247 | ||
3e6e0aab | 3248 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); |
b6c7a5dc HB |
3249 | *db = cs.db; |
3250 | *l = cs.l; | |
3251 | } | |
3252 | EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits); | |
3253 | ||
3254 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
3255 | struct kvm_sregs *sregs) | |
3256 | { | |
3257 | struct descriptor_table dt; | |
3258 | int pending_vec; | |
3259 | ||
3260 | vcpu_load(vcpu); | |
3261 | ||
3e6e0aab GT |
3262 | kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
3263 | kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
3264 | kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
3265 | kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
3266 | kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
3267 | kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 3268 | |
3e6e0aab GT |
3269 | kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
3270 | kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc HB |
3271 | |
3272 | kvm_x86_ops->get_idt(vcpu, &dt); | |
3273 | sregs->idt.limit = dt.limit; | |
3274 | sregs->idt.base = dt.base; | |
3275 | kvm_x86_ops->get_gdt(vcpu, &dt); | |
3276 | sregs->gdt.limit = dt.limit; | |
3277 | sregs->gdt.base = dt.base; | |
3278 | ||
3279 | kvm_x86_ops->decache_cr4_guest_bits(vcpu); | |
ad312c7c ZX |
3280 | sregs->cr0 = vcpu->arch.cr0; |
3281 | sregs->cr2 = vcpu->arch.cr2; | |
3282 | sregs->cr3 = vcpu->arch.cr3; | |
3283 | sregs->cr4 = vcpu->arch.cr4; | |
2d3ad1f4 | 3284 | sregs->cr8 = kvm_get_cr8(vcpu); |
ad312c7c | 3285 | sregs->efer = vcpu->arch.shadow_efer; |
b6c7a5dc HB |
3286 | sregs->apic_base = kvm_get_apic_base(vcpu); |
3287 | ||
3288 | if (irqchip_in_kernel(vcpu->kvm)) { | |
3289 | memset(sregs->interrupt_bitmap, 0, | |
3290 | sizeof sregs->interrupt_bitmap); | |
3291 | pending_vec = kvm_x86_ops->get_irq(vcpu); | |
3292 | if (pending_vec >= 0) | |
3293 | set_bit(pending_vec, | |
3294 | (unsigned long *)sregs->interrupt_bitmap); | |
3295 | } else | |
ad312c7c | 3296 | memcpy(sregs->interrupt_bitmap, vcpu->arch.irq_pending, |
b6c7a5dc HB |
3297 | sizeof sregs->interrupt_bitmap); |
3298 | ||
3299 | vcpu_put(vcpu); | |
3300 | ||
3301 | return 0; | |
3302 | } | |
3303 | ||
62d9f0db MT |
3304 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
3305 | struct kvm_mp_state *mp_state) | |
3306 | { | |
3307 | vcpu_load(vcpu); | |
3308 | mp_state->mp_state = vcpu->arch.mp_state; | |
3309 | vcpu_put(vcpu); | |
3310 | return 0; | |
3311 | } | |
3312 | ||
3313 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
3314 | struct kvm_mp_state *mp_state) | |
3315 | { | |
3316 | vcpu_load(vcpu); | |
3317 | vcpu->arch.mp_state = mp_state->mp_state; | |
3318 | vcpu_put(vcpu); | |
3319 | return 0; | |
3320 | } | |
3321 | ||
3e6e0aab | 3322 | static void kvm_set_segment(struct kvm_vcpu *vcpu, |
b6c7a5dc HB |
3323 | struct kvm_segment *var, int seg) |
3324 | { | |
14af3f3c | 3325 | kvm_x86_ops->set_segment(vcpu, var, seg); |
b6c7a5dc HB |
3326 | } |
3327 | ||
37817f29 IE |
3328 | static void seg_desct_to_kvm_desct(struct desc_struct *seg_desc, u16 selector, |
3329 | struct kvm_segment *kvm_desct) | |
3330 | { | |
3331 | kvm_desct->base = seg_desc->base0; | |
3332 | kvm_desct->base |= seg_desc->base1 << 16; | |
3333 | kvm_desct->base |= seg_desc->base2 << 24; | |
3334 | kvm_desct->limit = seg_desc->limit0; | |
3335 | kvm_desct->limit |= seg_desc->limit << 16; | |
c93cd3a5 MT |
3336 | if (seg_desc->g) { |
3337 | kvm_desct->limit <<= 12; | |
3338 | kvm_desct->limit |= 0xfff; | |
3339 | } | |
37817f29 IE |
3340 | kvm_desct->selector = selector; |
3341 | kvm_desct->type = seg_desc->type; | |
3342 | kvm_desct->present = seg_desc->p; | |
3343 | kvm_desct->dpl = seg_desc->dpl; | |
3344 | kvm_desct->db = seg_desc->d; | |
3345 | kvm_desct->s = seg_desc->s; | |
3346 | kvm_desct->l = seg_desc->l; | |
3347 | kvm_desct->g = seg_desc->g; | |
3348 | kvm_desct->avl = seg_desc->avl; | |
3349 | if (!selector) | |
3350 | kvm_desct->unusable = 1; | |
3351 | else | |
3352 | kvm_desct->unusable = 0; | |
3353 | kvm_desct->padding = 0; | |
3354 | } | |
3355 | ||
b8222ad2 AS |
3356 | static void get_segment_descriptor_dtable(struct kvm_vcpu *vcpu, |
3357 | u16 selector, | |
3358 | struct descriptor_table *dtable) | |
37817f29 IE |
3359 | { |
3360 | if (selector & 1 << 2) { | |
3361 | struct kvm_segment kvm_seg; | |
3362 | ||
3e6e0aab | 3363 | kvm_get_segment(vcpu, &kvm_seg, VCPU_SREG_LDTR); |
37817f29 IE |
3364 | |
3365 | if (kvm_seg.unusable) | |
3366 | dtable->limit = 0; | |
3367 | else | |
3368 | dtable->limit = kvm_seg.limit; | |
3369 | dtable->base = kvm_seg.base; | |
3370 | } | |
3371 | else | |
3372 | kvm_x86_ops->get_gdt(vcpu, dtable); | |
3373 | } | |
3374 | ||
3375 | /* allowed just for 8 bytes segments */ | |
3376 | static int load_guest_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, | |
3377 | struct desc_struct *seg_desc) | |
3378 | { | |
98899aa0 | 3379 | gpa_t gpa; |
37817f29 IE |
3380 | struct descriptor_table dtable; |
3381 | u16 index = selector >> 3; | |
3382 | ||
b8222ad2 | 3383 | get_segment_descriptor_dtable(vcpu, selector, &dtable); |
37817f29 IE |
3384 | |
3385 | if (dtable.limit < index * 8 + 7) { | |
3386 | kvm_queue_exception_e(vcpu, GP_VECTOR, selector & 0xfffc); | |
3387 | return 1; | |
3388 | } | |
98899aa0 MT |
3389 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, dtable.base); |
3390 | gpa += index * 8; | |
3391 | return kvm_read_guest(vcpu->kvm, gpa, seg_desc, 8); | |
37817f29 IE |
3392 | } |
3393 | ||
3394 | /* allowed just for 8 bytes segments */ | |
3395 | static int save_guest_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, | |
3396 | struct desc_struct *seg_desc) | |
3397 | { | |
98899aa0 | 3398 | gpa_t gpa; |
37817f29 IE |
3399 | struct descriptor_table dtable; |
3400 | u16 index = selector >> 3; | |
3401 | ||
b8222ad2 | 3402 | get_segment_descriptor_dtable(vcpu, selector, &dtable); |
37817f29 IE |
3403 | |
3404 | if (dtable.limit < index * 8 + 7) | |
3405 | return 1; | |
98899aa0 MT |
3406 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, dtable.base); |
3407 | gpa += index * 8; | |
3408 | return kvm_write_guest(vcpu->kvm, gpa, seg_desc, 8); | |
37817f29 IE |
3409 | } |
3410 | ||
3411 | static u32 get_tss_base_addr(struct kvm_vcpu *vcpu, | |
3412 | struct desc_struct *seg_desc) | |
3413 | { | |
3414 | u32 base_addr; | |
3415 | ||
3416 | base_addr = seg_desc->base0; | |
3417 | base_addr |= (seg_desc->base1 << 16); | |
3418 | base_addr |= (seg_desc->base2 << 24); | |
3419 | ||
98899aa0 | 3420 | return vcpu->arch.mmu.gva_to_gpa(vcpu, base_addr); |
37817f29 IE |
3421 | } |
3422 | ||
37817f29 IE |
3423 | static u16 get_segment_selector(struct kvm_vcpu *vcpu, int seg) |
3424 | { | |
3425 | struct kvm_segment kvm_seg; | |
3426 | ||
3e6e0aab | 3427 | kvm_get_segment(vcpu, &kvm_seg, seg); |
37817f29 IE |
3428 | return kvm_seg.selector; |
3429 | } | |
3430 | ||
3431 | static int load_segment_descriptor_to_kvm_desct(struct kvm_vcpu *vcpu, | |
3432 | u16 selector, | |
3433 | struct kvm_segment *kvm_seg) | |
3434 | { | |
3435 | struct desc_struct seg_desc; | |
3436 | ||
3437 | if (load_guest_segment_descriptor(vcpu, selector, &seg_desc)) | |
3438 | return 1; | |
3439 | seg_desct_to_kvm_desct(&seg_desc, selector, kvm_seg); | |
3440 | return 0; | |
3441 | } | |
3442 | ||
2259e3a7 | 3443 | static int kvm_load_realmode_segment(struct kvm_vcpu *vcpu, u16 selector, int seg) |
f4bbd9aa AK |
3444 | { |
3445 | struct kvm_segment segvar = { | |
3446 | .base = selector << 4, | |
3447 | .limit = 0xffff, | |
3448 | .selector = selector, | |
3449 | .type = 3, | |
3450 | .present = 1, | |
3451 | .dpl = 3, | |
3452 | .db = 0, | |
3453 | .s = 1, | |
3454 | .l = 0, | |
3455 | .g = 0, | |
3456 | .avl = 0, | |
3457 | .unusable = 0, | |
3458 | }; | |
3459 | kvm_x86_ops->set_segment(vcpu, &segvar, seg); | |
3460 | return 0; | |
3461 | } | |
3462 | ||
3e6e0aab GT |
3463 | int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, |
3464 | int type_bits, int seg) | |
37817f29 IE |
3465 | { |
3466 | struct kvm_segment kvm_seg; | |
3467 | ||
f4bbd9aa AK |
3468 | if (!(vcpu->arch.cr0 & X86_CR0_PE)) |
3469 | return kvm_load_realmode_segment(vcpu, selector, seg); | |
37817f29 IE |
3470 | if (load_segment_descriptor_to_kvm_desct(vcpu, selector, &kvm_seg)) |
3471 | return 1; | |
3472 | kvm_seg.type |= type_bits; | |
3473 | ||
3474 | if (seg != VCPU_SREG_SS && seg != VCPU_SREG_CS && | |
3475 | seg != VCPU_SREG_LDTR) | |
3476 | if (!kvm_seg.s) | |
3477 | kvm_seg.unusable = 1; | |
3478 | ||
3e6e0aab | 3479 | kvm_set_segment(vcpu, &kvm_seg, seg); |
37817f29 IE |
3480 | return 0; |
3481 | } | |
3482 | ||
3483 | static void save_state_to_tss32(struct kvm_vcpu *vcpu, | |
3484 | struct tss_segment_32 *tss) | |
3485 | { | |
3486 | tss->cr3 = vcpu->arch.cr3; | |
5fdbf976 | 3487 | tss->eip = kvm_rip_read(vcpu); |
37817f29 | 3488 | tss->eflags = kvm_x86_ops->get_rflags(vcpu); |
5fdbf976 MT |
3489 | tss->eax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
3490 | tss->ecx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
3491 | tss->edx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
3492 | tss->ebx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
3493 | tss->esp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
3494 | tss->ebp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
3495 | tss->esi = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
3496 | tss->edi = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
37817f29 IE |
3497 | tss->es = get_segment_selector(vcpu, VCPU_SREG_ES); |
3498 | tss->cs = get_segment_selector(vcpu, VCPU_SREG_CS); | |
3499 | tss->ss = get_segment_selector(vcpu, VCPU_SREG_SS); | |
3500 | tss->ds = get_segment_selector(vcpu, VCPU_SREG_DS); | |
3501 | tss->fs = get_segment_selector(vcpu, VCPU_SREG_FS); | |
3502 | tss->gs = get_segment_selector(vcpu, VCPU_SREG_GS); | |
3503 | tss->ldt_selector = get_segment_selector(vcpu, VCPU_SREG_LDTR); | |
3504 | tss->prev_task_link = get_segment_selector(vcpu, VCPU_SREG_TR); | |
3505 | } | |
3506 | ||
3507 | static int load_state_from_tss32(struct kvm_vcpu *vcpu, | |
3508 | struct tss_segment_32 *tss) | |
3509 | { | |
3510 | kvm_set_cr3(vcpu, tss->cr3); | |
3511 | ||
5fdbf976 | 3512 | kvm_rip_write(vcpu, tss->eip); |
37817f29 IE |
3513 | kvm_x86_ops->set_rflags(vcpu, tss->eflags | 2); |
3514 | ||
5fdbf976 MT |
3515 | kvm_register_write(vcpu, VCPU_REGS_RAX, tss->eax); |
3516 | kvm_register_write(vcpu, VCPU_REGS_RCX, tss->ecx); | |
3517 | kvm_register_write(vcpu, VCPU_REGS_RDX, tss->edx); | |
3518 | kvm_register_write(vcpu, VCPU_REGS_RBX, tss->ebx); | |
3519 | kvm_register_write(vcpu, VCPU_REGS_RSP, tss->esp); | |
3520 | kvm_register_write(vcpu, VCPU_REGS_RBP, tss->ebp); | |
3521 | kvm_register_write(vcpu, VCPU_REGS_RSI, tss->esi); | |
3522 | kvm_register_write(vcpu, VCPU_REGS_RDI, tss->edi); | |
37817f29 | 3523 | |
3e6e0aab | 3524 | if (kvm_load_segment_descriptor(vcpu, tss->ldt_selector, 0, VCPU_SREG_LDTR)) |
37817f29 IE |
3525 | return 1; |
3526 | ||
3e6e0aab | 3527 | if (kvm_load_segment_descriptor(vcpu, tss->es, 1, VCPU_SREG_ES)) |
37817f29 IE |
3528 | return 1; |
3529 | ||
3e6e0aab | 3530 | if (kvm_load_segment_descriptor(vcpu, tss->cs, 9, VCPU_SREG_CS)) |
37817f29 IE |
3531 | return 1; |
3532 | ||
3e6e0aab | 3533 | if (kvm_load_segment_descriptor(vcpu, tss->ss, 1, VCPU_SREG_SS)) |
37817f29 IE |
3534 | return 1; |
3535 | ||
3e6e0aab | 3536 | if (kvm_load_segment_descriptor(vcpu, tss->ds, 1, VCPU_SREG_DS)) |
37817f29 IE |
3537 | return 1; |
3538 | ||
3e6e0aab | 3539 | if (kvm_load_segment_descriptor(vcpu, tss->fs, 1, VCPU_SREG_FS)) |
37817f29 IE |
3540 | return 1; |
3541 | ||
3e6e0aab | 3542 | if (kvm_load_segment_descriptor(vcpu, tss->gs, 1, VCPU_SREG_GS)) |
37817f29 IE |
3543 | return 1; |
3544 | return 0; | |
3545 | } | |
3546 | ||
3547 | static void save_state_to_tss16(struct kvm_vcpu *vcpu, | |
3548 | struct tss_segment_16 *tss) | |
3549 | { | |
5fdbf976 | 3550 | tss->ip = kvm_rip_read(vcpu); |
37817f29 | 3551 | tss->flag = kvm_x86_ops->get_rflags(vcpu); |
5fdbf976 MT |
3552 | tss->ax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
3553 | tss->cx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
3554 | tss->dx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
3555 | tss->bx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
3556 | tss->sp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
3557 | tss->bp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
3558 | tss->si = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
3559 | tss->di = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
37817f29 IE |
3560 | |
3561 | tss->es = get_segment_selector(vcpu, VCPU_SREG_ES); | |
3562 | tss->cs = get_segment_selector(vcpu, VCPU_SREG_CS); | |
3563 | tss->ss = get_segment_selector(vcpu, VCPU_SREG_SS); | |
3564 | tss->ds = get_segment_selector(vcpu, VCPU_SREG_DS); | |
3565 | tss->ldt = get_segment_selector(vcpu, VCPU_SREG_LDTR); | |
3566 | tss->prev_task_link = get_segment_selector(vcpu, VCPU_SREG_TR); | |
3567 | } | |
3568 | ||
3569 | static int load_state_from_tss16(struct kvm_vcpu *vcpu, | |
3570 | struct tss_segment_16 *tss) | |
3571 | { | |
5fdbf976 | 3572 | kvm_rip_write(vcpu, tss->ip); |
37817f29 | 3573 | kvm_x86_ops->set_rflags(vcpu, tss->flag | 2); |
5fdbf976 MT |
3574 | kvm_register_write(vcpu, VCPU_REGS_RAX, tss->ax); |
3575 | kvm_register_write(vcpu, VCPU_REGS_RCX, tss->cx); | |
3576 | kvm_register_write(vcpu, VCPU_REGS_RDX, tss->dx); | |
3577 | kvm_register_write(vcpu, VCPU_REGS_RBX, tss->bx); | |
3578 | kvm_register_write(vcpu, VCPU_REGS_RSP, tss->sp); | |
3579 | kvm_register_write(vcpu, VCPU_REGS_RBP, tss->bp); | |
3580 | kvm_register_write(vcpu, VCPU_REGS_RSI, tss->si); | |
3581 | kvm_register_write(vcpu, VCPU_REGS_RDI, tss->di); | |
37817f29 | 3582 | |
3e6e0aab | 3583 | if (kvm_load_segment_descriptor(vcpu, tss->ldt, 0, VCPU_SREG_LDTR)) |
37817f29 IE |
3584 | return 1; |
3585 | ||
3e6e0aab | 3586 | if (kvm_load_segment_descriptor(vcpu, tss->es, 1, VCPU_SREG_ES)) |
37817f29 IE |
3587 | return 1; |
3588 | ||
3e6e0aab | 3589 | if (kvm_load_segment_descriptor(vcpu, tss->cs, 9, VCPU_SREG_CS)) |
37817f29 IE |
3590 | return 1; |
3591 | ||
3e6e0aab | 3592 | if (kvm_load_segment_descriptor(vcpu, tss->ss, 1, VCPU_SREG_SS)) |
37817f29 IE |
3593 | return 1; |
3594 | ||
3e6e0aab | 3595 | if (kvm_load_segment_descriptor(vcpu, tss->ds, 1, VCPU_SREG_DS)) |
37817f29 IE |
3596 | return 1; |
3597 | return 0; | |
3598 | } | |
3599 | ||
8b2cf73c | 3600 | static int kvm_task_switch_16(struct kvm_vcpu *vcpu, u16 tss_selector, |
34198bf8 | 3601 | u32 old_tss_base, |
37817f29 IE |
3602 | struct desc_struct *nseg_desc) |
3603 | { | |
3604 | struct tss_segment_16 tss_segment_16; | |
3605 | int ret = 0; | |
3606 | ||
34198bf8 MT |
3607 | if (kvm_read_guest(vcpu->kvm, old_tss_base, &tss_segment_16, |
3608 | sizeof tss_segment_16)) | |
37817f29 IE |
3609 | goto out; |
3610 | ||
3611 | save_state_to_tss16(vcpu, &tss_segment_16); | |
37817f29 | 3612 | |
34198bf8 MT |
3613 | if (kvm_write_guest(vcpu->kvm, old_tss_base, &tss_segment_16, |
3614 | sizeof tss_segment_16)) | |
37817f29 | 3615 | goto out; |
34198bf8 MT |
3616 | |
3617 | if (kvm_read_guest(vcpu->kvm, get_tss_base_addr(vcpu, nseg_desc), | |
3618 | &tss_segment_16, sizeof tss_segment_16)) | |
3619 | goto out; | |
3620 | ||
37817f29 IE |
3621 | if (load_state_from_tss16(vcpu, &tss_segment_16)) |
3622 | goto out; | |
3623 | ||
3624 | ret = 1; | |
3625 | out: | |
3626 | return ret; | |
3627 | } | |
3628 | ||
8b2cf73c | 3629 | static int kvm_task_switch_32(struct kvm_vcpu *vcpu, u16 tss_selector, |
34198bf8 | 3630 | u32 old_tss_base, |
37817f29 IE |
3631 | struct desc_struct *nseg_desc) |
3632 | { | |
3633 | struct tss_segment_32 tss_segment_32; | |
3634 | int ret = 0; | |
3635 | ||
34198bf8 MT |
3636 | if (kvm_read_guest(vcpu->kvm, old_tss_base, &tss_segment_32, |
3637 | sizeof tss_segment_32)) | |
37817f29 IE |
3638 | goto out; |
3639 | ||
3640 | save_state_to_tss32(vcpu, &tss_segment_32); | |
37817f29 | 3641 | |
34198bf8 MT |
3642 | if (kvm_write_guest(vcpu->kvm, old_tss_base, &tss_segment_32, |
3643 | sizeof tss_segment_32)) | |
3644 | goto out; | |
3645 | ||
3646 | if (kvm_read_guest(vcpu->kvm, get_tss_base_addr(vcpu, nseg_desc), | |
3647 | &tss_segment_32, sizeof tss_segment_32)) | |
37817f29 | 3648 | goto out; |
34198bf8 | 3649 | |
37817f29 IE |
3650 | if (load_state_from_tss32(vcpu, &tss_segment_32)) |
3651 | goto out; | |
3652 | ||
3653 | ret = 1; | |
3654 | out: | |
3655 | return ret; | |
3656 | } | |
3657 | ||
3658 | int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason) | |
3659 | { | |
3660 | struct kvm_segment tr_seg; | |
3661 | struct desc_struct cseg_desc; | |
3662 | struct desc_struct nseg_desc; | |
3663 | int ret = 0; | |
34198bf8 MT |
3664 | u32 old_tss_base = get_segment_base(vcpu, VCPU_SREG_TR); |
3665 | u16 old_tss_sel = get_segment_selector(vcpu, VCPU_SREG_TR); | |
37817f29 | 3666 | |
34198bf8 | 3667 | old_tss_base = vcpu->arch.mmu.gva_to_gpa(vcpu, old_tss_base); |
37817f29 | 3668 | |
34198bf8 MT |
3669 | /* FIXME: Handle errors. Failure to read either TSS or their |
3670 | * descriptors should generate a pagefault. | |
3671 | */ | |
37817f29 IE |
3672 | if (load_guest_segment_descriptor(vcpu, tss_selector, &nseg_desc)) |
3673 | goto out; | |
3674 | ||
34198bf8 | 3675 | if (load_guest_segment_descriptor(vcpu, old_tss_sel, &cseg_desc)) |
37817f29 IE |
3676 | goto out; |
3677 | ||
37817f29 IE |
3678 | if (reason != TASK_SWITCH_IRET) { |
3679 | int cpl; | |
3680 | ||
3681 | cpl = kvm_x86_ops->get_cpl(vcpu); | |
3682 | if ((tss_selector & 3) > nseg_desc.dpl || cpl > nseg_desc.dpl) { | |
3683 | kvm_queue_exception_e(vcpu, GP_VECTOR, 0); | |
3684 | return 1; | |
3685 | } | |
3686 | } | |
3687 | ||
3688 | if (!nseg_desc.p || (nseg_desc.limit0 | nseg_desc.limit << 16) < 0x67) { | |
3689 | kvm_queue_exception_e(vcpu, TS_VECTOR, tss_selector & 0xfffc); | |
3690 | return 1; | |
3691 | } | |
3692 | ||
3693 | if (reason == TASK_SWITCH_IRET || reason == TASK_SWITCH_JMP) { | |
3fe913e7 | 3694 | cseg_desc.type &= ~(1 << 1); //clear the B flag |
34198bf8 | 3695 | save_guest_segment_descriptor(vcpu, old_tss_sel, &cseg_desc); |
37817f29 IE |
3696 | } |
3697 | ||
3698 | if (reason == TASK_SWITCH_IRET) { | |
3699 | u32 eflags = kvm_x86_ops->get_rflags(vcpu); | |
3700 | kvm_x86_ops->set_rflags(vcpu, eflags & ~X86_EFLAGS_NT); | |
3701 | } | |
3702 | ||
3703 | kvm_x86_ops->skip_emulated_instruction(vcpu); | |
37817f29 IE |
3704 | |
3705 | if (nseg_desc.type & 8) | |
34198bf8 | 3706 | ret = kvm_task_switch_32(vcpu, tss_selector, old_tss_base, |
37817f29 IE |
3707 | &nseg_desc); |
3708 | else | |
34198bf8 | 3709 | ret = kvm_task_switch_16(vcpu, tss_selector, old_tss_base, |
37817f29 IE |
3710 | &nseg_desc); |
3711 | ||
3712 | if (reason == TASK_SWITCH_CALL || reason == TASK_SWITCH_GATE) { | |
3713 | u32 eflags = kvm_x86_ops->get_rflags(vcpu); | |
3714 | kvm_x86_ops->set_rflags(vcpu, eflags | X86_EFLAGS_NT); | |
3715 | } | |
3716 | ||
3717 | if (reason != TASK_SWITCH_IRET) { | |
3fe913e7 | 3718 | nseg_desc.type |= (1 << 1); |
37817f29 IE |
3719 | save_guest_segment_descriptor(vcpu, tss_selector, |
3720 | &nseg_desc); | |
3721 | } | |
3722 | ||
3723 | kvm_x86_ops->set_cr0(vcpu, vcpu->arch.cr0 | X86_CR0_TS); | |
3724 | seg_desct_to_kvm_desct(&nseg_desc, tss_selector, &tr_seg); | |
3725 | tr_seg.type = 11; | |
3e6e0aab | 3726 | kvm_set_segment(vcpu, &tr_seg, VCPU_SREG_TR); |
37817f29 | 3727 | out: |
37817f29 IE |
3728 | return ret; |
3729 | } | |
3730 | EXPORT_SYMBOL_GPL(kvm_task_switch); | |
3731 | ||
b6c7a5dc HB |
3732 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
3733 | struct kvm_sregs *sregs) | |
3734 | { | |
3735 | int mmu_reset_needed = 0; | |
3736 | int i, pending_vec, max_bits; | |
3737 | struct descriptor_table dt; | |
3738 | ||
3739 | vcpu_load(vcpu); | |
3740 | ||
3741 | dt.limit = sregs->idt.limit; | |
3742 | dt.base = sregs->idt.base; | |
3743 | kvm_x86_ops->set_idt(vcpu, &dt); | |
3744 | dt.limit = sregs->gdt.limit; | |
3745 | dt.base = sregs->gdt.base; | |
3746 | kvm_x86_ops->set_gdt(vcpu, &dt); | |
3747 | ||
ad312c7c ZX |
3748 | vcpu->arch.cr2 = sregs->cr2; |
3749 | mmu_reset_needed |= vcpu->arch.cr3 != sregs->cr3; | |
3750 | vcpu->arch.cr3 = sregs->cr3; | |
b6c7a5dc | 3751 | |
2d3ad1f4 | 3752 | kvm_set_cr8(vcpu, sregs->cr8); |
b6c7a5dc | 3753 | |
ad312c7c | 3754 | mmu_reset_needed |= vcpu->arch.shadow_efer != sregs->efer; |
b6c7a5dc | 3755 | kvm_x86_ops->set_efer(vcpu, sregs->efer); |
b6c7a5dc HB |
3756 | kvm_set_apic_base(vcpu, sregs->apic_base); |
3757 | ||
3758 | kvm_x86_ops->decache_cr4_guest_bits(vcpu); | |
3759 | ||
ad312c7c | 3760 | mmu_reset_needed |= vcpu->arch.cr0 != sregs->cr0; |
b6c7a5dc | 3761 | kvm_x86_ops->set_cr0(vcpu, sregs->cr0); |
d7306163 | 3762 | vcpu->arch.cr0 = sregs->cr0; |
b6c7a5dc | 3763 | |
ad312c7c | 3764 | mmu_reset_needed |= vcpu->arch.cr4 != sregs->cr4; |
b6c7a5dc HB |
3765 | kvm_x86_ops->set_cr4(vcpu, sregs->cr4); |
3766 | if (!is_long_mode(vcpu) && is_pae(vcpu)) | |
ad312c7c | 3767 | load_pdptrs(vcpu, vcpu->arch.cr3); |
b6c7a5dc HB |
3768 | |
3769 | if (mmu_reset_needed) | |
3770 | kvm_mmu_reset_context(vcpu); | |
3771 | ||
3772 | if (!irqchip_in_kernel(vcpu->kvm)) { | |
ad312c7c ZX |
3773 | memcpy(vcpu->arch.irq_pending, sregs->interrupt_bitmap, |
3774 | sizeof vcpu->arch.irq_pending); | |
3775 | vcpu->arch.irq_summary = 0; | |
3776 | for (i = 0; i < ARRAY_SIZE(vcpu->arch.irq_pending); ++i) | |
3777 | if (vcpu->arch.irq_pending[i]) | |
3778 | __set_bit(i, &vcpu->arch.irq_summary); | |
b6c7a5dc HB |
3779 | } else { |
3780 | max_bits = (sizeof sregs->interrupt_bitmap) << 3; | |
3781 | pending_vec = find_first_bit( | |
3782 | (const unsigned long *)sregs->interrupt_bitmap, | |
3783 | max_bits); | |
3784 | /* Only pending external irq is handled here */ | |
3785 | if (pending_vec < max_bits) { | |
3786 | kvm_x86_ops->set_irq(vcpu, pending_vec); | |
3787 | pr_debug("Set back pending irq %d\n", | |
3788 | pending_vec); | |
3789 | } | |
e4825800 | 3790 | kvm_pic_clear_isr_ack(vcpu->kvm); |
b6c7a5dc HB |
3791 | } |
3792 | ||
3e6e0aab GT |
3793 | kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
3794 | kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
3795 | kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
3796 | kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
3797 | kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
3798 | kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 3799 | |
3e6e0aab GT |
3800 | kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
3801 | kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc | 3802 | |
9c3e4aab MT |
3803 | /* Older userspace won't unhalt the vcpu on reset. */ |
3804 | if (vcpu->vcpu_id == 0 && kvm_rip_read(vcpu) == 0xfff0 && | |
3805 | sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 && | |
3806 | !(vcpu->arch.cr0 & X86_CR0_PE)) | |
3807 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; | |
3808 | ||
b6c7a5dc HB |
3809 | vcpu_put(vcpu); |
3810 | ||
3811 | return 0; | |
3812 | } | |
3813 | ||
3814 | int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu, | |
3815 | struct kvm_debug_guest *dbg) | |
3816 | { | |
3817 | int r; | |
3818 | ||
3819 | vcpu_load(vcpu); | |
3820 | ||
3821 | r = kvm_x86_ops->set_guest_debug(vcpu, dbg); | |
3822 | ||
3823 | vcpu_put(vcpu); | |
3824 | ||
3825 | return r; | |
3826 | } | |
3827 | ||
d0752060 HB |
3828 | /* |
3829 | * fxsave fpu state. Taken from x86_64/processor.h. To be killed when | |
3830 | * we have asm/x86/processor.h | |
3831 | */ | |
3832 | struct fxsave { | |
3833 | u16 cwd; | |
3834 | u16 swd; | |
3835 | u16 twd; | |
3836 | u16 fop; | |
3837 | u64 rip; | |
3838 | u64 rdp; | |
3839 | u32 mxcsr; | |
3840 | u32 mxcsr_mask; | |
3841 | u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */ | |
3842 | #ifdef CONFIG_X86_64 | |
3843 | u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */ | |
3844 | #else | |
3845 | u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */ | |
3846 | #endif | |
3847 | }; | |
3848 | ||
8b006791 ZX |
3849 | /* |
3850 | * Translate a guest virtual address to a guest physical address. | |
3851 | */ | |
3852 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
3853 | struct kvm_translation *tr) | |
3854 | { | |
3855 | unsigned long vaddr = tr->linear_address; | |
3856 | gpa_t gpa; | |
3857 | ||
3858 | vcpu_load(vcpu); | |
72dc67a6 | 3859 | down_read(&vcpu->kvm->slots_lock); |
ad312c7c | 3860 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, vaddr); |
72dc67a6 | 3861 | up_read(&vcpu->kvm->slots_lock); |
8b006791 ZX |
3862 | tr->physical_address = gpa; |
3863 | tr->valid = gpa != UNMAPPED_GVA; | |
3864 | tr->writeable = 1; | |
3865 | tr->usermode = 0; | |
8b006791 ZX |
3866 | vcpu_put(vcpu); |
3867 | ||
3868 | return 0; | |
3869 | } | |
3870 | ||
d0752060 HB |
3871 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
3872 | { | |
ad312c7c | 3873 | struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image; |
d0752060 HB |
3874 | |
3875 | vcpu_load(vcpu); | |
3876 | ||
3877 | memcpy(fpu->fpr, fxsave->st_space, 128); | |
3878 | fpu->fcw = fxsave->cwd; | |
3879 | fpu->fsw = fxsave->swd; | |
3880 | fpu->ftwx = fxsave->twd; | |
3881 | fpu->last_opcode = fxsave->fop; | |
3882 | fpu->last_ip = fxsave->rip; | |
3883 | fpu->last_dp = fxsave->rdp; | |
3884 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space); | |
3885 | ||
3886 | vcpu_put(vcpu); | |
3887 | ||
3888 | return 0; | |
3889 | } | |
3890 | ||
3891 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
3892 | { | |
ad312c7c | 3893 | struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image; |
d0752060 HB |
3894 | |
3895 | vcpu_load(vcpu); | |
3896 | ||
3897 | memcpy(fxsave->st_space, fpu->fpr, 128); | |
3898 | fxsave->cwd = fpu->fcw; | |
3899 | fxsave->swd = fpu->fsw; | |
3900 | fxsave->twd = fpu->ftwx; | |
3901 | fxsave->fop = fpu->last_opcode; | |
3902 | fxsave->rip = fpu->last_ip; | |
3903 | fxsave->rdp = fpu->last_dp; | |
3904 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space); | |
3905 | ||
3906 | vcpu_put(vcpu); | |
3907 | ||
3908 | return 0; | |
3909 | } | |
3910 | ||
3911 | void fx_init(struct kvm_vcpu *vcpu) | |
3912 | { | |
3913 | unsigned after_mxcsr_mask; | |
3914 | ||
bc1a34f1 AA |
3915 | /* |
3916 | * Touch the fpu the first time in non atomic context as if | |
3917 | * this is the first fpu instruction the exception handler | |
3918 | * will fire before the instruction returns and it'll have to | |
3919 | * allocate ram with GFP_KERNEL. | |
3920 | */ | |
3921 | if (!used_math()) | |
d6e88aec | 3922 | kvm_fx_save(&vcpu->arch.host_fx_image); |
bc1a34f1 | 3923 | |
d0752060 HB |
3924 | /* Initialize guest FPU by resetting ours and saving into guest's */ |
3925 | preempt_disable(); | |
d6e88aec AK |
3926 | kvm_fx_save(&vcpu->arch.host_fx_image); |
3927 | kvm_fx_finit(); | |
3928 | kvm_fx_save(&vcpu->arch.guest_fx_image); | |
3929 | kvm_fx_restore(&vcpu->arch.host_fx_image); | |
d0752060 HB |
3930 | preempt_enable(); |
3931 | ||
ad312c7c | 3932 | vcpu->arch.cr0 |= X86_CR0_ET; |
d0752060 | 3933 | after_mxcsr_mask = offsetof(struct i387_fxsave_struct, st_space); |
ad312c7c ZX |
3934 | vcpu->arch.guest_fx_image.mxcsr = 0x1f80; |
3935 | memset((void *)&vcpu->arch.guest_fx_image + after_mxcsr_mask, | |
d0752060 HB |
3936 | 0, sizeof(struct i387_fxsave_struct) - after_mxcsr_mask); |
3937 | } | |
3938 | EXPORT_SYMBOL_GPL(fx_init); | |
3939 | ||
3940 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) | |
3941 | { | |
3942 | if (!vcpu->fpu_active || vcpu->guest_fpu_loaded) | |
3943 | return; | |
3944 | ||
3945 | vcpu->guest_fpu_loaded = 1; | |
d6e88aec AK |
3946 | kvm_fx_save(&vcpu->arch.host_fx_image); |
3947 | kvm_fx_restore(&vcpu->arch.guest_fx_image); | |
d0752060 HB |
3948 | } |
3949 | EXPORT_SYMBOL_GPL(kvm_load_guest_fpu); | |
3950 | ||
3951 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) | |
3952 | { | |
3953 | if (!vcpu->guest_fpu_loaded) | |
3954 | return; | |
3955 | ||
3956 | vcpu->guest_fpu_loaded = 0; | |
d6e88aec AK |
3957 | kvm_fx_save(&vcpu->arch.guest_fx_image); |
3958 | kvm_fx_restore(&vcpu->arch.host_fx_image); | |
f096ed85 | 3959 | ++vcpu->stat.fpu_reload; |
d0752060 HB |
3960 | } |
3961 | EXPORT_SYMBOL_GPL(kvm_put_guest_fpu); | |
e9b11c17 ZX |
3962 | |
3963 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
3964 | { | |
3965 | kvm_x86_ops->vcpu_free(vcpu); | |
3966 | } | |
3967 | ||
3968 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
3969 | unsigned int id) | |
3970 | { | |
26e5215f AK |
3971 | return kvm_x86_ops->vcpu_create(kvm, id); |
3972 | } | |
e9b11c17 | 3973 | |
26e5215f AK |
3974 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
3975 | { | |
3976 | int r; | |
e9b11c17 ZX |
3977 | |
3978 | /* We do fxsave: this must be aligned. */ | |
ad312c7c | 3979 | BUG_ON((unsigned long)&vcpu->arch.host_fx_image & 0xF); |
e9b11c17 | 3980 | |
0bed3b56 | 3981 | vcpu->arch.mtrr_state.have_fixed = 1; |
e9b11c17 ZX |
3982 | vcpu_load(vcpu); |
3983 | r = kvm_arch_vcpu_reset(vcpu); | |
3984 | if (r == 0) | |
3985 | r = kvm_mmu_setup(vcpu); | |
3986 | vcpu_put(vcpu); | |
3987 | if (r < 0) | |
3988 | goto free_vcpu; | |
3989 | ||
26e5215f | 3990 | return 0; |
e9b11c17 ZX |
3991 | free_vcpu: |
3992 | kvm_x86_ops->vcpu_free(vcpu); | |
26e5215f | 3993 | return r; |
e9b11c17 ZX |
3994 | } |
3995 | ||
d40ccc62 | 3996 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
e9b11c17 ZX |
3997 | { |
3998 | vcpu_load(vcpu); | |
3999 | kvm_mmu_unload(vcpu); | |
4000 | vcpu_put(vcpu); | |
4001 | ||
4002 | kvm_x86_ops->vcpu_free(vcpu); | |
4003 | } | |
4004 | ||
4005 | int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu) | |
4006 | { | |
448fa4a9 JK |
4007 | vcpu->arch.nmi_pending = false; |
4008 | vcpu->arch.nmi_injected = false; | |
4009 | ||
e9b11c17 ZX |
4010 | return kvm_x86_ops->vcpu_reset(vcpu); |
4011 | } | |
4012 | ||
4013 | void kvm_arch_hardware_enable(void *garbage) | |
4014 | { | |
4015 | kvm_x86_ops->hardware_enable(garbage); | |
4016 | } | |
4017 | ||
4018 | void kvm_arch_hardware_disable(void *garbage) | |
4019 | { | |
4020 | kvm_x86_ops->hardware_disable(garbage); | |
4021 | } | |
4022 | ||
4023 | int kvm_arch_hardware_setup(void) | |
4024 | { | |
4025 | return kvm_x86_ops->hardware_setup(); | |
4026 | } | |
4027 | ||
4028 | void kvm_arch_hardware_unsetup(void) | |
4029 | { | |
4030 | kvm_x86_ops->hardware_unsetup(); | |
4031 | } | |
4032 | ||
4033 | void kvm_arch_check_processor_compat(void *rtn) | |
4034 | { | |
4035 | kvm_x86_ops->check_processor_compatibility(rtn); | |
4036 | } | |
4037 | ||
4038 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
4039 | { | |
4040 | struct page *page; | |
4041 | struct kvm *kvm; | |
4042 | int r; | |
4043 | ||
4044 | BUG_ON(vcpu->kvm == NULL); | |
4045 | kvm = vcpu->kvm; | |
4046 | ||
ad312c7c | 4047 | vcpu->arch.mmu.root_hpa = INVALID_PAGE; |
e9b11c17 | 4048 | if (!irqchip_in_kernel(kvm) || vcpu->vcpu_id == 0) |
a4535290 | 4049 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
e9b11c17 | 4050 | else |
a4535290 | 4051 | vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED; |
e9b11c17 ZX |
4052 | |
4053 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
4054 | if (!page) { | |
4055 | r = -ENOMEM; | |
4056 | goto fail; | |
4057 | } | |
ad312c7c | 4058 | vcpu->arch.pio_data = page_address(page); |
e9b11c17 ZX |
4059 | |
4060 | r = kvm_mmu_create(vcpu); | |
4061 | if (r < 0) | |
4062 | goto fail_free_pio_data; | |
4063 | ||
4064 | if (irqchip_in_kernel(kvm)) { | |
4065 | r = kvm_create_lapic(vcpu); | |
4066 | if (r < 0) | |
4067 | goto fail_mmu_destroy; | |
4068 | } | |
4069 | ||
4070 | return 0; | |
4071 | ||
4072 | fail_mmu_destroy: | |
4073 | kvm_mmu_destroy(vcpu); | |
4074 | fail_free_pio_data: | |
ad312c7c | 4075 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 ZX |
4076 | fail: |
4077 | return r; | |
4078 | } | |
4079 | ||
4080 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
4081 | { | |
4082 | kvm_free_lapic(vcpu); | |
3200f405 | 4083 | down_read(&vcpu->kvm->slots_lock); |
e9b11c17 | 4084 | kvm_mmu_destroy(vcpu); |
3200f405 | 4085 | up_read(&vcpu->kvm->slots_lock); |
ad312c7c | 4086 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 | 4087 | } |
d19a9cd2 ZX |
4088 | |
4089 | struct kvm *kvm_arch_create_vm(void) | |
4090 | { | |
4091 | struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); | |
4092 | ||
4093 | if (!kvm) | |
4094 | return ERR_PTR(-ENOMEM); | |
4095 | ||
f05e70ac | 4096 | INIT_LIST_HEAD(&kvm->arch.active_mmu_pages); |
6cffe8ca | 4097 | INIT_LIST_HEAD(&kvm->arch.oos_global_pages); |
4d5c5d0f | 4098 | INIT_LIST_HEAD(&kvm->arch.assigned_dev_head); |
d19a9cd2 | 4099 | |
5550af4d SY |
4100 | /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */ |
4101 | set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap); | |
4102 | ||
d19a9cd2 ZX |
4103 | return kvm; |
4104 | } | |
4105 | ||
4106 | static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu) | |
4107 | { | |
4108 | vcpu_load(vcpu); | |
4109 | kvm_mmu_unload(vcpu); | |
4110 | vcpu_put(vcpu); | |
4111 | } | |
4112 | ||
4113 | static void kvm_free_vcpus(struct kvm *kvm) | |
4114 | { | |
4115 | unsigned int i; | |
4116 | ||
4117 | /* | |
4118 | * Unpin any mmu pages first. | |
4119 | */ | |
4120 | for (i = 0; i < KVM_MAX_VCPUS; ++i) | |
4121 | if (kvm->vcpus[i]) | |
4122 | kvm_unload_vcpu_mmu(kvm->vcpus[i]); | |
4123 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
4124 | if (kvm->vcpus[i]) { | |
4125 | kvm_arch_vcpu_free(kvm->vcpus[i]); | |
4126 | kvm->vcpus[i] = NULL; | |
4127 | } | |
4128 | } | |
4129 | ||
4130 | } | |
4131 | ||
ad8ba2cd SY |
4132 | void kvm_arch_sync_events(struct kvm *kvm) |
4133 | { | |
ba4cef31 | 4134 | kvm_free_all_assigned_devices(kvm); |
ad8ba2cd SY |
4135 | } |
4136 | ||
d19a9cd2 ZX |
4137 | void kvm_arch_destroy_vm(struct kvm *kvm) |
4138 | { | |
6eb55818 | 4139 | kvm_iommu_unmap_guest(kvm); |
7837699f | 4140 | kvm_free_pit(kvm); |
d7deeeb0 ZX |
4141 | kfree(kvm->arch.vpic); |
4142 | kfree(kvm->arch.vioapic); | |
d19a9cd2 ZX |
4143 | kvm_free_vcpus(kvm); |
4144 | kvm_free_physmem(kvm); | |
3d45830c AK |
4145 | if (kvm->arch.apic_access_page) |
4146 | put_page(kvm->arch.apic_access_page); | |
b7ebfb05 SY |
4147 | if (kvm->arch.ept_identity_pagetable) |
4148 | put_page(kvm->arch.ept_identity_pagetable); | |
d19a9cd2 ZX |
4149 | kfree(kvm); |
4150 | } | |
0de10343 ZX |
4151 | |
4152 | int kvm_arch_set_memory_region(struct kvm *kvm, | |
4153 | struct kvm_userspace_memory_region *mem, | |
4154 | struct kvm_memory_slot old, | |
4155 | int user_alloc) | |
4156 | { | |
4157 | int npages = mem->memory_size >> PAGE_SHIFT; | |
4158 | struct kvm_memory_slot *memslot = &kvm->memslots[mem->slot]; | |
4159 | ||
4160 | /*To keep backward compatibility with older userspace, | |
4161 | *x86 needs to hanlde !user_alloc case. | |
4162 | */ | |
4163 | if (!user_alloc) { | |
4164 | if (npages && !old.rmap) { | |
604b38ac AA |
4165 | unsigned long userspace_addr; |
4166 | ||
72dc67a6 | 4167 | down_write(¤t->mm->mmap_sem); |
604b38ac AA |
4168 | userspace_addr = do_mmap(NULL, 0, |
4169 | npages * PAGE_SIZE, | |
4170 | PROT_READ | PROT_WRITE, | |
acee3c04 | 4171 | MAP_PRIVATE | MAP_ANONYMOUS, |
604b38ac | 4172 | 0); |
72dc67a6 | 4173 | up_write(¤t->mm->mmap_sem); |
0de10343 | 4174 | |
604b38ac AA |
4175 | if (IS_ERR((void *)userspace_addr)) |
4176 | return PTR_ERR((void *)userspace_addr); | |
4177 | ||
4178 | /* set userspace_addr atomically for kvm_hva_to_rmapp */ | |
4179 | spin_lock(&kvm->mmu_lock); | |
4180 | memslot->userspace_addr = userspace_addr; | |
4181 | spin_unlock(&kvm->mmu_lock); | |
0de10343 ZX |
4182 | } else { |
4183 | if (!old.user_alloc && old.rmap) { | |
4184 | int ret; | |
4185 | ||
72dc67a6 | 4186 | down_write(¤t->mm->mmap_sem); |
0de10343 ZX |
4187 | ret = do_munmap(current->mm, old.userspace_addr, |
4188 | old.npages * PAGE_SIZE); | |
72dc67a6 | 4189 | up_write(¤t->mm->mmap_sem); |
0de10343 ZX |
4190 | if (ret < 0) |
4191 | printk(KERN_WARNING | |
4192 | "kvm_vm_ioctl_set_memory_region: " | |
4193 | "failed to munmap memory\n"); | |
4194 | } | |
4195 | } | |
4196 | } | |
4197 | ||
f05e70ac | 4198 | if (!kvm->arch.n_requested_mmu_pages) { |
0de10343 ZX |
4199 | unsigned int nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm); |
4200 | kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages); | |
4201 | } | |
4202 | ||
4203 | kvm_mmu_slot_remove_write_access(kvm, mem->slot); | |
4204 | kvm_flush_remote_tlbs(kvm); | |
4205 | ||
4206 | return 0; | |
4207 | } | |
1d737c8a | 4208 | |
34d4cb8f MT |
4209 | void kvm_arch_flush_shadow(struct kvm *kvm) |
4210 | { | |
4211 | kvm_mmu_zap_all(kvm); | |
4212 | } | |
4213 | ||
1d737c8a ZX |
4214 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
4215 | { | |
a4535290 | 4216 | return vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE |
0496fbb9 JK |
4217 | || vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED |
4218 | || vcpu->arch.nmi_pending; | |
1d737c8a | 4219 | } |
5736199a ZX |
4220 | |
4221 | static void vcpu_kick_intr(void *info) | |
4222 | { | |
4223 | #ifdef DEBUG | |
4224 | struct kvm_vcpu *vcpu = (struct kvm_vcpu *)info; | |
4225 | printk(KERN_DEBUG "vcpu_kick_intr %p \n", vcpu); | |
4226 | #endif | |
4227 | } | |
4228 | ||
4229 | void kvm_vcpu_kick(struct kvm_vcpu *vcpu) | |
4230 | { | |
4231 | int ipi_pcpu = vcpu->cpu; | |
e9571ed5 | 4232 | int cpu = get_cpu(); |
5736199a ZX |
4233 | |
4234 | if (waitqueue_active(&vcpu->wq)) { | |
4235 | wake_up_interruptible(&vcpu->wq); | |
4236 | ++vcpu->stat.halt_wakeup; | |
4237 | } | |
e9571ed5 MT |
4238 | /* |
4239 | * We may be called synchronously with irqs disabled in guest mode, | |
4240 | * So need not to call smp_call_function_single() in that case. | |
4241 | */ | |
4242 | if (vcpu->guest_mode && vcpu->cpu != cpu) | |
8691e5a8 | 4243 | smp_call_function_single(ipi_pcpu, vcpu_kick_intr, vcpu, 0); |
e9571ed5 | 4244 | put_cpu(); |
5736199a | 4245 | } |