]>
Commit | Line | Data |
---|---|---|
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> |
62c476c7 | 37 | #include <linux/intel-iommu.h> |
043405e1 CO |
38 | |
39 | #include <asm/uaccess.h> | |
d825ed0a | 40 | #include <asm/msr.h> |
a5f61300 | 41 | #include <asm/desc.h> |
043405e1 | 42 | |
313a3dc7 | 43 | #define MAX_IO_MSRS 256 |
a03490ed CO |
44 | #define CR0_RESERVED_BITS \ |
45 | (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \ | |
46 | | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \ | |
47 | | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG)) | |
48 | #define CR4_RESERVED_BITS \ | |
49 | (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\ | |
50 | | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \ | |
51 | | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \ | |
52 | | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE)) | |
53 | ||
54 | #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR) | |
50a37eb4 JR |
55 | /* EFER defaults: |
56 | * - enable syscall per default because its emulated by KVM | |
57 | * - enable LME and LMA per default on 64 bit KVM | |
58 | */ | |
59 | #ifdef CONFIG_X86_64 | |
60 | static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffafeULL; | |
61 | #else | |
62 | static u64 __read_mostly efer_reserved_bits = 0xfffffffffffffffeULL; | |
63 | #endif | |
313a3dc7 | 64 | |
ba1389b7 AK |
65 | #define VM_STAT(x) offsetof(struct kvm, stat.x), KVM_STAT_VM |
66 | #define VCPU_STAT(x) offsetof(struct kvm_vcpu, stat.x), KVM_STAT_VCPU | |
417bc304 | 67 | |
674eea0f AK |
68 | static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, |
69 | struct kvm_cpuid_entry2 __user *entries); | |
70 | ||
97896d04 | 71 | struct kvm_x86_ops *kvm_x86_ops; |
5fdbf976 | 72 | EXPORT_SYMBOL_GPL(kvm_x86_ops); |
97896d04 | 73 | |
417bc304 | 74 | struct kvm_stats_debugfs_item debugfs_entries[] = { |
ba1389b7 AK |
75 | { "pf_fixed", VCPU_STAT(pf_fixed) }, |
76 | { "pf_guest", VCPU_STAT(pf_guest) }, | |
77 | { "tlb_flush", VCPU_STAT(tlb_flush) }, | |
78 | { "invlpg", VCPU_STAT(invlpg) }, | |
79 | { "exits", VCPU_STAT(exits) }, | |
80 | { "io_exits", VCPU_STAT(io_exits) }, | |
81 | { "mmio_exits", VCPU_STAT(mmio_exits) }, | |
82 | { "signal_exits", VCPU_STAT(signal_exits) }, | |
83 | { "irq_window", VCPU_STAT(irq_window_exits) }, | |
f08864b4 | 84 | { "nmi_window", VCPU_STAT(nmi_window_exits) }, |
ba1389b7 AK |
85 | { "halt_exits", VCPU_STAT(halt_exits) }, |
86 | { "halt_wakeup", VCPU_STAT(halt_wakeup) }, | |
f11c3a8d | 87 | { "hypercalls", VCPU_STAT(hypercalls) }, |
ba1389b7 AK |
88 | { "request_irq", VCPU_STAT(request_irq_exits) }, |
89 | { "irq_exits", VCPU_STAT(irq_exits) }, | |
90 | { "host_state_reload", VCPU_STAT(host_state_reload) }, | |
91 | { "efer_reload", VCPU_STAT(efer_reload) }, | |
92 | { "fpu_reload", VCPU_STAT(fpu_reload) }, | |
93 | { "insn_emulation", VCPU_STAT(insn_emulation) }, | |
94 | { "insn_emulation_fail", VCPU_STAT(insn_emulation_fail) }, | |
fa89a817 | 95 | { "irq_injections", VCPU_STAT(irq_injections) }, |
4cee5764 AK |
96 | { "mmu_shadow_zapped", VM_STAT(mmu_shadow_zapped) }, |
97 | { "mmu_pte_write", VM_STAT(mmu_pte_write) }, | |
98 | { "mmu_pte_updated", VM_STAT(mmu_pte_updated) }, | |
99 | { "mmu_pde_zapped", VM_STAT(mmu_pde_zapped) }, | |
100 | { "mmu_flooded", VM_STAT(mmu_flooded) }, | |
101 | { "mmu_recycled", VM_STAT(mmu_recycled) }, | |
dfc5aa00 | 102 | { "mmu_cache_miss", VM_STAT(mmu_cache_miss) }, |
4731d4c7 | 103 | { "mmu_unsync", VM_STAT(mmu_unsync) }, |
0f74a24c | 104 | { "remote_tlb_flush", VM_STAT(remote_tlb_flush) }, |
05da4558 | 105 | { "largepages", VM_STAT(lpages) }, |
417bc304 HB |
106 | { NULL } |
107 | }; | |
108 | ||
5fb76f9b CO |
109 | unsigned long segment_base(u16 selector) |
110 | { | |
111 | struct descriptor_table gdt; | |
a5f61300 | 112 | struct desc_struct *d; |
5fb76f9b CO |
113 | unsigned long table_base; |
114 | unsigned long v; | |
115 | ||
116 | if (selector == 0) | |
117 | return 0; | |
118 | ||
119 | asm("sgdt %0" : "=m"(gdt)); | |
120 | table_base = gdt.base; | |
121 | ||
122 | if (selector & 4) { /* from ldt */ | |
123 | u16 ldt_selector; | |
124 | ||
125 | asm("sldt %0" : "=g"(ldt_selector)); | |
126 | table_base = segment_base(ldt_selector); | |
127 | } | |
a5f61300 AK |
128 | d = (struct desc_struct *)(table_base + (selector & ~7)); |
129 | v = d->base0 | ((unsigned long)d->base1 << 16) | | |
130 | ((unsigned long)d->base2 << 24); | |
5fb76f9b | 131 | #ifdef CONFIG_X86_64 |
a5f61300 AK |
132 | if (d->s == 0 && (d->type == 2 || d->type == 9 || d->type == 11)) |
133 | v |= ((unsigned long)((struct ldttss_desc64 *)d)->base3) << 32; | |
5fb76f9b CO |
134 | #endif |
135 | return v; | |
136 | } | |
137 | EXPORT_SYMBOL_GPL(segment_base); | |
138 | ||
6866b83e CO |
139 | u64 kvm_get_apic_base(struct kvm_vcpu *vcpu) |
140 | { | |
141 | if (irqchip_in_kernel(vcpu->kvm)) | |
ad312c7c | 142 | return vcpu->arch.apic_base; |
6866b83e | 143 | else |
ad312c7c | 144 | return vcpu->arch.apic_base; |
6866b83e CO |
145 | } |
146 | EXPORT_SYMBOL_GPL(kvm_get_apic_base); | |
147 | ||
148 | void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data) | |
149 | { | |
150 | /* TODO: reserve bits check */ | |
151 | if (irqchip_in_kernel(vcpu->kvm)) | |
152 | kvm_lapic_set_base(vcpu, data); | |
153 | else | |
ad312c7c | 154 | vcpu->arch.apic_base = data; |
6866b83e CO |
155 | } |
156 | EXPORT_SYMBOL_GPL(kvm_set_apic_base); | |
157 | ||
298101da AK |
158 | void kvm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr) |
159 | { | |
ad312c7c ZX |
160 | WARN_ON(vcpu->arch.exception.pending); |
161 | vcpu->arch.exception.pending = true; | |
162 | vcpu->arch.exception.has_error_code = false; | |
163 | vcpu->arch.exception.nr = nr; | |
298101da AK |
164 | } |
165 | EXPORT_SYMBOL_GPL(kvm_queue_exception); | |
166 | ||
c3c91fee AK |
167 | void kvm_inject_page_fault(struct kvm_vcpu *vcpu, unsigned long addr, |
168 | u32 error_code) | |
169 | { | |
170 | ++vcpu->stat.pf_guest; | |
71c4dfaf JR |
171 | if (vcpu->arch.exception.pending) { |
172 | if (vcpu->arch.exception.nr == PF_VECTOR) { | |
173 | printk(KERN_DEBUG "kvm: inject_page_fault:" | |
174 | " double fault 0x%lx\n", addr); | |
175 | vcpu->arch.exception.nr = DF_VECTOR; | |
176 | vcpu->arch.exception.error_code = 0; | |
177 | } else if (vcpu->arch.exception.nr == DF_VECTOR) { | |
178 | /* triple fault -> shutdown */ | |
179 | set_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests); | |
180 | } | |
c3c91fee AK |
181 | return; |
182 | } | |
ad312c7c | 183 | vcpu->arch.cr2 = addr; |
c3c91fee AK |
184 | kvm_queue_exception_e(vcpu, PF_VECTOR, error_code); |
185 | } | |
186 | ||
3419ffc8 SY |
187 | void kvm_inject_nmi(struct kvm_vcpu *vcpu) |
188 | { | |
189 | vcpu->arch.nmi_pending = 1; | |
190 | } | |
191 | EXPORT_SYMBOL_GPL(kvm_inject_nmi); | |
192 | ||
298101da AK |
193 | void kvm_queue_exception_e(struct kvm_vcpu *vcpu, unsigned nr, u32 error_code) |
194 | { | |
ad312c7c ZX |
195 | WARN_ON(vcpu->arch.exception.pending); |
196 | vcpu->arch.exception.pending = true; | |
197 | vcpu->arch.exception.has_error_code = true; | |
198 | vcpu->arch.exception.nr = nr; | |
199 | vcpu->arch.exception.error_code = error_code; | |
298101da AK |
200 | } |
201 | EXPORT_SYMBOL_GPL(kvm_queue_exception_e); | |
202 | ||
203 | static void __queue_exception(struct kvm_vcpu *vcpu) | |
204 | { | |
ad312c7c ZX |
205 | kvm_x86_ops->queue_exception(vcpu, vcpu->arch.exception.nr, |
206 | vcpu->arch.exception.has_error_code, | |
207 | vcpu->arch.exception.error_code); | |
298101da AK |
208 | } |
209 | ||
a03490ed CO |
210 | /* |
211 | * Load the pae pdptrs. Return true is they are all valid. | |
212 | */ | |
213 | int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3) | |
214 | { | |
215 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; | |
216 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; | |
217 | int i; | |
218 | int ret; | |
ad312c7c | 219 | u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)]; |
a03490ed | 220 | |
a03490ed CO |
221 | ret = kvm_read_guest_page(vcpu->kvm, pdpt_gfn, pdpte, |
222 | offset * sizeof(u64), sizeof(pdpte)); | |
223 | if (ret < 0) { | |
224 | ret = 0; | |
225 | goto out; | |
226 | } | |
227 | for (i = 0; i < ARRAY_SIZE(pdpte); ++i) { | |
228 | if ((pdpte[i] & 1) && (pdpte[i] & 0xfffffff0000001e6ull)) { | |
229 | ret = 0; | |
230 | goto out; | |
231 | } | |
232 | } | |
233 | ret = 1; | |
234 | ||
ad312c7c | 235 | memcpy(vcpu->arch.pdptrs, pdpte, sizeof(vcpu->arch.pdptrs)); |
a03490ed | 236 | out: |
a03490ed CO |
237 | |
238 | return ret; | |
239 | } | |
cc4b6871 | 240 | EXPORT_SYMBOL_GPL(load_pdptrs); |
a03490ed | 241 | |
d835dfec AK |
242 | static bool pdptrs_changed(struct kvm_vcpu *vcpu) |
243 | { | |
ad312c7c | 244 | u64 pdpte[ARRAY_SIZE(vcpu->arch.pdptrs)]; |
d835dfec AK |
245 | bool changed = true; |
246 | int r; | |
247 | ||
248 | if (is_long_mode(vcpu) || !is_pae(vcpu)) | |
249 | return false; | |
250 | ||
ad312c7c | 251 | r = kvm_read_guest(vcpu->kvm, vcpu->arch.cr3 & ~31u, pdpte, sizeof(pdpte)); |
d835dfec AK |
252 | if (r < 0) |
253 | goto out; | |
ad312c7c | 254 | changed = memcmp(pdpte, vcpu->arch.pdptrs, sizeof(pdpte)) != 0; |
d835dfec | 255 | out: |
d835dfec AK |
256 | |
257 | return changed; | |
258 | } | |
259 | ||
2d3ad1f4 | 260 | void kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) |
a03490ed CO |
261 | { |
262 | if (cr0 & CR0_RESERVED_BITS) { | |
263 | printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n", | |
ad312c7c | 264 | cr0, vcpu->arch.cr0); |
c1a5d4f9 | 265 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
266 | return; |
267 | } | |
268 | ||
269 | if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) { | |
270 | printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n"); | |
c1a5d4f9 | 271 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
272 | return; |
273 | } | |
274 | ||
275 | if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) { | |
276 | printk(KERN_DEBUG "set_cr0: #GP, set PG flag " | |
277 | "and a clear PE flag\n"); | |
c1a5d4f9 | 278 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
279 | return; |
280 | } | |
281 | ||
282 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { | |
283 | #ifdef CONFIG_X86_64 | |
ad312c7c | 284 | if ((vcpu->arch.shadow_efer & EFER_LME)) { |
a03490ed CO |
285 | int cs_db, cs_l; |
286 | ||
287 | if (!is_pae(vcpu)) { | |
288 | printk(KERN_DEBUG "set_cr0: #GP, start paging " | |
289 | "in long mode while PAE is disabled\n"); | |
c1a5d4f9 | 290 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
291 | return; |
292 | } | |
293 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
294 | if (cs_l) { | |
295 | printk(KERN_DEBUG "set_cr0: #GP, start paging " | |
296 | "in long mode while CS.L == 1\n"); | |
c1a5d4f9 | 297 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
298 | return; |
299 | ||
300 | } | |
301 | } else | |
302 | #endif | |
ad312c7c | 303 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->arch.cr3)) { |
a03490ed CO |
304 | printk(KERN_DEBUG "set_cr0: #GP, pdptrs " |
305 | "reserved bits\n"); | |
c1a5d4f9 | 306 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
307 | return; |
308 | } | |
309 | ||
310 | } | |
311 | ||
312 | kvm_x86_ops->set_cr0(vcpu, cr0); | |
ad312c7c | 313 | vcpu->arch.cr0 = cr0; |
a03490ed | 314 | |
a03490ed | 315 | kvm_mmu_reset_context(vcpu); |
a03490ed CO |
316 | return; |
317 | } | |
2d3ad1f4 | 318 | EXPORT_SYMBOL_GPL(kvm_set_cr0); |
a03490ed | 319 | |
2d3ad1f4 | 320 | void kvm_lmsw(struct kvm_vcpu *vcpu, unsigned long msw) |
a03490ed | 321 | { |
2d3ad1f4 | 322 | kvm_set_cr0(vcpu, (vcpu->arch.cr0 & ~0x0ful) | (msw & 0x0f)); |
2714d1d3 FEL |
323 | KVMTRACE_1D(LMSW, vcpu, |
324 | (u32)((vcpu->arch.cr0 & ~0x0ful) | (msw & 0x0f)), | |
325 | handler); | |
a03490ed | 326 | } |
2d3ad1f4 | 327 | EXPORT_SYMBOL_GPL(kvm_lmsw); |
a03490ed | 328 | |
2d3ad1f4 | 329 | void kvm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) |
a03490ed CO |
330 | { |
331 | if (cr4 & CR4_RESERVED_BITS) { | |
332 | printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n"); | |
c1a5d4f9 | 333 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
334 | return; |
335 | } | |
336 | ||
337 | if (is_long_mode(vcpu)) { | |
338 | if (!(cr4 & X86_CR4_PAE)) { | |
339 | printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while " | |
340 | "in long mode\n"); | |
c1a5d4f9 | 341 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
342 | return; |
343 | } | |
344 | } else if (is_paging(vcpu) && !is_pae(vcpu) && (cr4 & X86_CR4_PAE) | |
ad312c7c | 345 | && !load_pdptrs(vcpu, vcpu->arch.cr3)) { |
a03490ed | 346 | printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n"); |
c1a5d4f9 | 347 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
348 | return; |
349 | } | |
350 | ||
351 | if (cr4 & X86_CR4_VMXE) { | |
352 | printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n"); | |
c1a5d4f9 | 353 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
354 | return; |
355 | } | |
356 | kvm_x86_ops->set_cr4(vcpu, cr4); | |
ad312c7c | 357 | vcpu->arch.cr4 = cr4; |
a03490ed | 358 | kvm_mmu_reset_context(vcpu); |
a03490ed | 359 | } |
2d3ad1f4 | 360 | EXPORT_SYMBOL_GPL(kvm_set_cr4); |
a03490ed | 361 | |
2d3ad1f4 | 362 | void kvm_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) |
a03490ed | 363 | { |
ad312c7c | 364 | if (cr3 == vcpu->arch.cr3 && !pdptrs_changed(vcpu)) { |
0ba73cda | 365 | kvm_mmu_sync_roots(vcpu); |
d835dfec AK |
366 | kvm_mmu_flush_tlb(vcpu); |
367 | return; | |
368 | } | |
369 | ||
a03490ed CO |
370 | if (is_long_mode(vcpu)) { |
371 | if (cr3 & CR3_L_MODE_RESERVED_BITS) { | |
372 | printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n"); | |
c1a5d4f9 | 373 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
374 | return; |
375 | } | |
376 | } else { | |
377 | if (is_pae(vcpu)) { | |
378 | if (cr3 & CR3_PAE_RESERVED_BITS) { | |
379 | printk(KERN_DEBUG | |
380 | "set_cr3: #GP, reserved bits\n"); | |
c1a5d4f9 | 381 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
382 | return; |
383 | } | |
384 | if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) { | |
385 | printk(KERN_DEBUG "set_cr3: #GP, pdptrs " | |
386 | "reserved bits\n"); | |
c1a5d4f9 | 387 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
388 | return; |
389 | } | |
390 | } | |
391 | /* | |
392 | * We don't check reserved bits in nonpae mode, because | |
393 | * this isn't enforced, and VMware depends on this. | |
394 | */ | |
395 | } | |
396 | ||
a03490ed CO |
397 | /* |
398 | * Does the new cr3 value map to physical memory? (Note, we | |
399 | * catch an invalid cr3 even in real-mode, because it would | |
400 | * cause trouble later on when we turn on paging anyway.) | |
401 | * | |
402 | * A real CPU would silently accept an invalid cr3 and would | |
403 | * attempt to use it - with largely undefined (and often hard | |
404 | * to debug) behavior on the guest side. | |
405 | */ | |
406 | if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT))) | |
c1a5d4f9 | 407 | kvm_inject_gp(vcpu, 0); |
a03490ed | 408 | else { |
ad312c7c ZX |
409 | vcpu->arch.cr3 = cr3; |
410 | vcpu->arch.mmu.new_cr3(vcpu); | |
a03490ed | 411 | } |
a03490ed | 412 | } |
2d3ad1f4 | 413 | EXPORT_SYMBOL_GPL(kvm_set_cr3); |
a03490ed | 414 | |
2d3ad1f4 | 415 | void kvm_set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) |
a03490ed CO |
416 | { |
417 | if (cr8 & CR8_RESERVED_BITS) { | |
418 | printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8); | |
c1a5d4f9 | 419 | kvm_inject_gp(vcpu, 0); |
a03490ed CO |
420 | return; |
421 | } | |
422 | if (irqchip_in_kernel(vcpu->kvm)) | |
423 | kvm_lapic_set_tpr(vcpu, cr8); | |
424 | else | |
ad312c7c | 425 | vcpu->arch.cr8 = cr8; |
a03490ed | 426 | } |
2d3ad1f4 | 427 | EXPORT_SYMBOL_GPL(kvm_set_cr8); |
a03490ed | 428 | |
2d3ad1f4 | 429 | unsigned long kvm_get_cr8(struct kvm_vcpu *vcpu) |
a03490ed CO |
430 | { |
431 | if (irqchip_in_kernel(vcpu->kvm)) | |
432 | return kvm_lapic_get_cr8(vcpu); | |
433 | else | |
ad312c7c | 434 | return vcpu->arch.cr8; |
a03490ed | 435 | } |
2d3ad1f4 | 436 | EXPORT_SYMBOL_GPL(kvm_get_cr8); |
a03490ed | 437 | |
043405e1 CO |
438 | /* |
439 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS | |
440 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. | |
441 | * | |
442 | * This list is modified at module load time to reflect the | |
443 | * capabilities of the host cpu. | |
444 | */ | |
445 | static u32 msrs_to_save[] = { | |
446 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, | |
447 | MSR_K6_STAR, | |
448 | #ifdef CONFIG_X86_64 | |
449 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, | |
450 | #endif | |
18068523 | 451 | MSR_IA32_TIME_STAMP_COUNTER, MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK, |
847f0ad8 | 452 | MSR_IA32_PERF_STATUS, |
043405e1 CO |
453 | }; |
454 | ||
455 | static unsigned num_msrs_to_save; | |
456 | ||
457 | static u32 emulated_msrs[] = { | |
458 | MSR_IA32_MISC_ENABLE, | |
459 | }; | |
460 | ||
15c4a640 CO |
461 | static void set_efer(struct kvm_vcpu *vcpu, u64 efer) |
462 | { | |
f2b4b7dd | 463 | if (efer & efer_reserved_bits) { |
15c4a640 CO |
464 | printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n", |
465 | efer); | |
c1a5d4f9 | 466 | kvm_inject_gp(vcpu, 0); |
15c4a640 CO |
467 | return; |
468 | } | |
469 | ||
470 | if (is_paging(vcpu) | |
ad312c7c | 471 | && (vcpu->arch.shadow_efer & EFER_LME) != (efer & EFER_LME)) { |
15c4a640 | 472 | printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n"); |
c1a5d4f9 | 473 | kvm_inject_gp(vcpu, 0); |
15c4a640 CO |
474 | return; |
475 | } | |
476 | ||
477 | kvm_x86_ops->set_efer(vcpu, efer); | |
478 | ||
479 | efer &= ~EFER_LMA; | |
ad312c7c | 480 | efer |= vcpu->arch.shadow_efer & EFER_LMA; |
15c4a640 | 481 | |
ad312c7c | 482 | vcpu->arch.shadow_efer = efer; |
15c4a640 CO |
483 | } |
484 | ||
f2b4b7dd JR |
485 | void kvm_enable_efer_bits(u64 mask) |
486 | { | |
487 | efer_reserved_bits &= ~mask; | |
488 | } | |
489 | EXPORT_SYMBOL_GPL(kvm_enable_efer_bits); | |
490 | ||
491 | ||
15c4a640 CO |
492 | /* |
493 | * Writes msr value into into the appropriate "register". | |
494 | * Returns 0 on success, non-0 otherwise. | |
495 | * Assumes vcpu_load() was already called. | |
496 | */ | |
497 | int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) | |
498 | { | |
499 | return kvm_x86_ops->set_msr(vcpu, msr_index, data); | |
500 | } | |
501 | ||
313a3dc7 CO |
502 | /* |
503 | * Adapt set_msr() to msr_io()'s calling convention | |
504 | */ | |
505 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) | |
506 | { | |
507 | return kvm_set_msr(vcpu, index, *data); | |
508 | } | |
509 | ||
18068523 GOC |
510 | static void kvm_write_wall_clock(struct kvm *kvm, gpa_t wall_clock) |
511 | { | |
512 | static int version; | |
50d0a0f9 GH |
513 | struct pvclock_wall_clock wc; |
514 | struct timespec now, sys, boot; | |
18068523 GOC |
515 | |
516 | if (!wall_clock) | |
517 | return; | |
518 | ||
519 | version++; | |
520 | ||
18068523 GOC |
521 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); |
522 | ||
50d0a0f9 GH |
523 | /* |
524 | * The guest calculates current wall clock time by adding | |
525 | * system time (updated by kvm_write_guest_time below) to the | |
526 | * wall clock specified here. guest system time equals host | |
527 | * system time for us, thus we must fill in host boot time here. | |
528 | */ | |
529 | now = current_kernel_time(); | |
530 | ktime_get_ts(&sys); | |
531 | boot = ns_to_timespec(timespec_to_ns(&now) - timespec_to_ns(&sys)); | |
532 | ||
533 | wc.sec = boot.tv_sec; | |
534 | wc.nsec = boot.tv_nsec; | |
535 | wc.version = version; | |
18068523 GOC |
536 | |
537 | kvm_write_guest(kvm, wall_clock, &wc, sizeof(wc)); | |
538 | ||
539 | version++; | |
540 | kvm_write_guest(kvm, wall_clock, &version, sizeof(version)); | |
18068523 GOC |
541 | } |
542 | ||
50d0a0f9 GH |
543 | static uint32_t div_frac(uint32_t dividend, uint32_t divisor) |
544 | { | |
545 | uint32_t quotient, remainder; | |
546 | ||
547 | /* Don't try to replace with do_div(), this one calculates | |
548 | * "(dividend << 32) / divisor" */ | |
549 | __asm__ ( "divl %4" | |
550 | : "=a" (quotient), "=d" (remainder) | |
551 | : "0" (0), "1" (dividend), "r" (divisor) ); | |
552 | return quotient; | |
553 | } | |
554 | ||
555 | static void kvm_set_time_scale(uint32_t tsc_khz, struct pvclock_vcpu_time_info *hv_clock) | |
556 | { | |
557 | uint64_t nsecs = 1000000000LL; | |
558 | int32_t shift = 0; | |
559 | uint64_t tps64; | |
560 | uint32_t tps32; | |
561 | ||
562 | tps64 = tsc_khz * 1000LL; | |
563 | while (tps64 > nsecs*2) { | |
564 | tps64 >>= 1; | |
565 | shift--; | |
566 | } | |
567 | ||
568 | tps32 = (uint32_t)tps64; | |
569 | while (tps32 <= (uint32_t)nsecs) { | |
570 | tps32 <<= 1; | |
571 | shift++; | |
572 | } | |
573 | ||
574 | hv_clock->tsc_shift = shift; | |
575 | hv_clock->tsc_to_system_mul = div_frac(nsecs, tps32); | |
576 | ||
577 | pr_debug("%s: tsc_khz %u, tsc_shift %d, tsc_mul %u\n", | |
80a914dc | 578 | __func__, tsc_khz, hv_clock->tsc_shift, |
50d0a0f9 GH |
579 | hv_clock->tsc_to_system_mul); |
580 | } | |
581 | ||
18068523 GOC |
582 | static void kvm_write_guest_time(struct kvm_vcpu *v) |
583 | { | |
584 | struct timespec ts; | |
585 | unsigned long flags; | |
586 | struct kvm_vcpu_arch *vcpu = &v->arch; | |
587 | void *shared_kaddr; | |
588 | ||
589 | if ((!vcpu->time_page)) | |
590 | return; | |
591 | ||
50d0a0f9 GH |
592 | if (unlikely(vcpu->hv_clock_tsc_khz != tsc_khz)) { |
593 | kvm_set_time_scale(tsc_khz, &vcpu->hv_clock); | |
594 | vcpu->hv_clock_tsc_khz = tsc_khz; | |
595 | } | |
596 | ||
18068523 GOC |
597 | /* Keep irq disabled to prevent changes to the clock */ |
598 | local_irq_save(flags); | |
599 | kvm_get_msr(v, MSR_IA32_TIME_STAMP_COUNTER, | |
600 | &vcpu->hv_clock.tsc_timestamp); | |
601 | ktime_get_ts(&ts); | |
602 | local_irq_restore(flags); | |
603 | ||
604 | /* With all the info we got, fill in the values */ | |
605 | ||
606 | vcpu->hv_clock.system_time = ts.tv_nsec + | |
607 | (NSEC_PER_SEC * (u64)ts.tv_sec); | |
608 | /* | |
609 | * The interface expects us to write an even number signaling that the | |
610 | * update is finished. Since the guest won't see the intermediate | |
50d0a0f9 | 611 | * state, we just increase by 2 at the end. |
18068523 | 612 | */ |
50d0a0f9 | 613 | vcpu->hv_clock.version += 2; |
18068523 GOC |
614 | |
615 | shared_kaddr = kmap_atomic(vcpu->time_page, KM_USER0); | |
616 | ||
617 | memcpy(shared_kaddr + vcpu->time_offset, &vcpu->hv_clock, | |
50d0a0f9 | 618 | sizeof(vcpu->hv_clock)); |
18068523 GOC |
619 | |
620 | kunmap_atomic(shared_kaddr, KM_USER0); | |
621 | ||
622 | mark_page_dirty(v->kvm, vcpu->time >> PAGE_SHIFT); | |
623 | } | |
624 | ||
9ba075a6 AK |
625 | static bool msr_mtrr_valid(unsigned msr) |
626 | { | |
627 | switch (msr) { | |
628 | case 0x200 ... 0x200 + 2 * KVM_NR_VAR_MTRR - 1: | |
629 | case MSR_MTRRfix64K_00000: | |
630 | case MSR_MTRRfix16K_80000: | |
631 | case MSR_MTRRfix16K_A0000: | |
632 | case MSR_MTRRfix4K_C0000: | |
633 | case MSR_MTRRfix4K_C8000: | |
634 | case MSR_MTRRfix4K_D0000: | |
635 | case MSR_MTRRfix4K_D8000: | |
636 | case MSR_MTRRfix4K_E0000: | |
637 | case MSR_MTRRfix4K_E8000: | |
638 | case MSR_MTRRfix4K_F0000: | |
639 | case MSR_MTRRfix4K_F8000: | |
640 | case MSR_MTRRdefType: | |
641 | case MSR_IA32_CR_PAT: | |
642 | return true; | |
643 | case 0x2f8: | |
644 | return true; | |
645 | } | |
646 | return false; | |
647 | } | |
648 | ||
649 | static int set_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
650 | { | |
651 | if (!msr_mtrr_valid(msr)) | |
652 | return 1; | |
653 | ||
654 | vcpu->arch.mtrr[msr - 0x200] = data; | |
655 | return 0; | |
656 | } | |
15c4a640 CO |
657 | |
658 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) | |
659 | { | |
660 | switch (msr) { | |
15c4a640 CO |
661 | case MSR_EFER: |
662 | set_efer(vcpu, data); | |
663 | break; | |
15c4a640 CO |
664 | case MSR_IA32_MC0_STATUS: |
665 | pr_unimpl(vcpu, "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n", | |
b8688d51 | 666 | __func__, data); |
15c4a640 CO |
667 | break; |
668 | case MSR_IA32_MCG_STATUS: | |
669 | pr_unimpl(vcpu, "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n", | |
b8688d51 | 670 | __func__, data); |
15c4a640 | 671 | break; |
c7ac679c JR |
672 | case MSR_IA32_MCG_CTL: |
673 | pr_unimpl(vcpu, "%s: MSR_IA32_MCG_CTL 0x%llx, nop\n", | |
b8688d51 | 674 | __func__, data); |
c7ac679c | 675 | break; |
b5e2fec0 AG |
676 | case MSR_IA32_DEBUGCTLMSR: |
677 | if (!data) { | |
678 | /* We support the non-activated case already */ | |
679 | break; | |
680 | } else if (data & ~(DEBUGCTLMSR_LBR | DEBUGCTLMSR_BTF)) { | |
681 | /* Values other than LBR and BTF are vendor-specific, | |
682 | thus reserved and should throw a #GP */ | |
683 | return 1; | |
684 | } | |
685 | pr_unimpl(vcpu, "%s: MSR_IA32_DEBUGCTLMSR 0x%llx, nop\n", | |
686 | __func__, data); | |
687 | break; | |
15c4a640 CO |
688 | case MSR_IA32_UCODE_REV: |
689 | case MSR_IA32_UCODE_WRITE: | |
15c4a640 | 690 | break; |
9ba075a6 AK |
691 | case 0x200 ... 0x2ff: |
692 | return set_msr_mtrr(vcpu, msr, data); | |
15c4a640 CO |
693 | case MSR_IA32_APICBASE: |
694 | kvm_set_apic_base(vcpu, data); | |
695 | break; | |
696 | case MSR_IA32_MISC_ENABLE: | |
ad312c7c | 697 | vcpu->arch.ia32_misc_enable_msr = data; |
15c4a640 | 698 | break; |
18068523 GOC |
699 | case MSR_KVM_WALL_CLOCK: |
700 | vcpu->kvm->arch.wall_clock = data; | |
701 | kvm_write_wall_clock(vcpu->kvm, data); | |
702 | break; | |
703 | case MSR_KVM_SYSTEM_TIME: { | |
704 | if (vcpu->arch.time_page) { | |
705 | kvm_release_page_dirty(vcpu->arch.time_page); | |
706 | vcpu->arch.time_page = NULL; | |
707 | } | |
708 | ||
709 | vcpu->arch.time = data; | |
710 | ||
711 | /* we verify if the enable bit is set... */ | |
712 | if (!(data & 1)) | |
713 | break; | |
714 | ||
715 | /* ...but clean it before doing the actual write */ | |
716 | vcpu->arch.time_offset = data & ~(PAGE_MASK | 1); | |
717 | ||
18068523 GOC |
718 | vcpu->arch.time_page = |
719 | gfn_to_page(vcpu->kvm, data >> PAGE_SHIFT); | |
18068523 GOC |
720 | |
721 | if (is_error_page(vcpu->arch.time_page)) { | |
722 | kvm_release_page_clean(vcpu->arch.time_page); | |
723 | vcpu->arch.time_page = NULL; | |
724 | } | |
725 | ||
726 | kvm_write_guest_time(vcpu); | |
727 | break; | |
728 | } | |
15c4a640 | 729 | default: |
565f1fbd | 730 | pr_unimpl(vcpu, "unhandled wrmsr: 0x%x data %llx\n", msr, data); |
15c4a640 CO |
731 | return 1; |
732 | } | |
733 | return 0; | |
734 | } | |
735 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); | |
736 | ||
737 | ||
738 | /* | |
739 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
740 | * Returns 0 on success, non-0 otherwise. | |
741 | * Assumes vcpu_load() was already called. | |
742 | */ | |
743 | int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) | |
744 | { | |
745 | return kvm_x86_ops->get_msr(vcpu, msr_index, pdata); | |
746 | } | |
747 | ||
9ba075a6 AK |
748 | static int get_msr_mtrr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
749 | { | |
750 | if (!msr_mtrr_valid(msr)) | |
751 | return 1; | |
752 | ||
753 | *pdata = vcpu->arch.mtrr[msr - 0x200]; | |
754 | return 0; | |
755 | } | |
756 | ||
15c4a640 CO |
757 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
758 | { | |
759 | u64 data; | |
760 | ||
761 | switch (msr) { | |
762 | case 0xc0010010: /* SYSCFG */ | |
763 | case 0xc0010015: /* HWCR */ | |
764 | case MSR_IA32_PLATFORM_ID: | |
765 | case MSR_IA32_P5_MC_ADDR: | |
766 | case MSR_IA32_P5_MC_TYPE: | |
767 | case MSR_IA32_MC0_CTL: | |
768 | case MSR_IA32_MCG_STATUS: | |
769 | case MSR_IA32_MCG_CAP: | |
c7ac679c | 770 | case MSR_IA32_MCG_CTL: |
15c4a640 CO |
771 | case MSR_IA32_MC0_MISC: |
772 | case MSR_IA32_MC0_MISC+4: | |
773 | case MSR_IA32_MC0_MISC+8: | |
774 | case MSR_IA32_MC0_MISC+12: | |
775 | case MSR_IA32_MC0_MISC+16: | |
a89c1ad2 | 776 | case MSR_IA32_MC0_MISC+20: |
15c4a640 | 777 | case MSR_IA32_UCODE_REV: |
15c4a640 | 778 | case MSR_IA32_EBL_CR_POWERON: |
b5e2fec0 AG |
779 | case MSR_IA32_DEBUGCTLMSR: |
780 | case MSR_IA32_LASTBRANCHFROMIP: | |
781 | case MSR_IA32_LASTBRANCHTOIP: | |
782 | case MSR_IA32_LASTINTFROMIP: | |
783 | case MSR_IA32_LASTINTTOIP: | |
15c4a640 CO |
784 | data = 0; |
785 | break; | |
9ba075a6 AK |
786 | case MSR_MTRRcap: |
787 | data = 0x500 | KVM_NR_VAR_MTRR; | |
788 | break; | |
789 | case 0x200 ... 0x2ff: | |
790 | return get_msr_mtrr(vcpu, msr, pdata); | |
15c4a640 CO |
791 | case 0xcd: /* fsb frequency */ |
792 | data = 3; | |
793 | break; | |
794 | case MSR_IA32_APICBASE: | |
795 | data = kvm_get_apic_base(vcpu); | |
796 | break; | |
797 | case MSR_IA32_MISC_ENABLE: | |
ad312c7c | 798 | data = vcpu->arch.ia32_misc_enable_msr; |
15c4a640 | 799 | break; |
847f0ad8 AG |
800 | case MSR_IA32_PERF_STATUS: |
801 | /* TSC increment by tick */ | |
802 | data = 1000ULL; | |
803 | /* CPU multiplier */ | |
804 | data |= (((uint64_t)4ULL) << 40); | |
805 | break; | |
15c4a640 | 806 | case MSR_EFER: |
ad312c7c | 807 | data = vcpu->arch.shadow_efer; |
15c4a640 | 808 | break; |
18068523 GOC |
809 | case MSR_KVM_WALL_CLOCK: |
810 | data = vcpu->kvm->arch.wall_clock; | |
811 | break; | |
812 | case MSR_KVM_SYSTEM_TIME: | |
813 | data = vcpu->arch.time; | |
814 | break; | |
15c4a640 CO |
815 | default: |
816 | pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr); | |
817 | return 1; | |
818 | } | |
819 | *pdata = data; | |
820 | return 0; | |
821 | } | |
822 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); | |
823 | ||
313a3dc7 CO |
824 | /* |
825 | * Read or write a bunch of msrs. All parameters are kernel addresses. | |
826 | * | |
827 | * @return number of msrs set successfully. | |
828 | */ | |
829 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, | |
830 | struct kvm_msr_entry *entries, | |
831 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
832 | unsigned index, u64 *data)) | |
833 | { | |
834 | int i; | |
835 | ||
836 | vcpu_load(vcpu); | |
837 | ||
3200f405 | 838 | down_read(&vcpu->kvm->slots_lock); |
313a3dc7 CO |
839 | for (i = 0; i < msrs->nmsrs; ++i) |
840 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) | |
841 | break; | |
3200f405 | 842 | up_read(&vcpu->kvm->slots_lock); |
313a3dc7 CO |
843 | |
844 | vcpu_put(vcpu); | |
845 | ||
846 | return i; | |
847 | } | |
848 | ||
849 | /* | |
850 | * Read or write a bunch of msrs. Parameters are user addresses. | |
851 | * | |
852 | * @return number of msrs set successfully. | |
853 | */ | |
854 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, | |
855 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
856 | unsigned index, u64 *data), | |
857 | int writeback) | |
858 | { | |
859 | struct kvm_msrs msrs; | |
860 | struct kvm_msr_entry *entries; | |
861 | int r, n; | |
862 | unsigned size; | |
863 | ||
864 | r = -EFAULT; | |
865 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) | |
866 | goto out; | |
867 | ||
868 | r = -E2BIG; | |
869 | if (msrs.nmsrs >= MAX_IO_MSRS) | |
870 | goto out; | |
871 | ||
872 | r = -ENOMEM; | |
873 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; | |
874 | entries = vmalloc(size); | |
875 | if (!entries) | |
876 | goto out; | |
877 | ||
878 | r = -EFAULT; | |
879 | if (copy_from_user(entries, user_msrs->entries, size)) | |
880 | goto out_free; | |
881 | ||
882 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); | |
883 | if (r < 0) | |
884 | goto out_free; | |
885 | ||
886 | r = -EFAULT; | |
887 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) | |
888 | goto out_free; | |
889 | ||
890 | r = n; | |
891 | ||
892 | out_free: | |
893 | vfree(entries); | |
894 | out: | |
895 | return r; | |
896 | } | |
897 | ||
018d00d2 ZX |
898 | int kvm_dev_ioctl_check_extension(long ext) |
899 | { | |
900 | int r; | |
901 | ||
902 | switch (ext) { | |
903 | case KVM_CAP_IRQCHIP: | |
904 | case KVM_CAP_HLT: | |
905 | case KVM_CAP_MMU_SHADOW_CACHE_CONTROL: | |
906 | case KVM_CAP_USER_MEMORY: | |
907 | case KVM_CAP_SET_TSS_ADDR: | |
07716717 | 908 | case KVM_CAP_EXT_CPUID: |
18068523 | 909 | case KVM_CAP_CLOCKSOURCE: |
7837699f | 910 | case KVM_CAP_PIT: |
a28e4f5a | 911 | case KVM_CAP_NOP_IO_DELAY: |
62d9f0db | 912 | case KVM_CAP_MP_STATE: |
ed848624 | 913 | case KVM_CAP_SYNC_MMU: |
018d00d2 ZX |
914 | r = 1; |
915 | break; | |
542472b5 LV |
916 | case KVM_CAP_COALESCED_MMIO: |
917 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; | |
918 | break; | |
774ead3a AK |
919 | case KVM_CAP_VAPIC: |
920 | r = !kvm_x86_ops->cpu_has_accelerated_tpr(); | |
921 | break; | |
f725230a AK |
922 | case KVM_CAP_NR_VCPUS: |
923 | r = KVM_MAX_VCPUS; | |
924 | break; | |
a988b910 AK |
925 | case KVM_CAP_NR_MEMSLOTS: |
926 | r = KVM_MEMORY_SLOTS; | |
927 | break; | |
2f333bcb MT |
928 | case KVM_CAP_PV_MMU: |
929 | r = !tdp_enabled; | |
930 | break; | |
62c476c7 BAY |
931 | case KVM_CAP_IOMMU: |
932 | r = intel_iommu_found(); | |
933 | break; | |
018d00d2 ZX |
934 | default: |
935 | r = 0; | |
936 | break; | |
937 | } | |
938 | return r; | |
939 | ||
940 | } | |
941 | ||
043405e1 CO |
942 | long kvm_arch_dev_ioctl(struct file *filp, |
943 | unsigned int ioctl, unsigned long arg) | |
944 | { | |
945 | void __user *argp = (void __user *)arg; | |
946 | long r; | |
947 | ||
948 | switch (ioctl) { | |
949 | case KVM_GET_MSR_INDEX_LIST: { | |
950 | struct kvm_msr_list __user *user_msr_list = argp; | |
951 | struct kvm_msr_list msr_list; | |
952 | unsigned n; | |
953 | ||
954 | r = -EFAULT; | |
955 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) | |
956 | goto out; | |
957 | n = msr_list.nmsrs; | |
958 | msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs); | |
959 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) | |
960 | goto out; | |
961 | r = -E2BIG; | |
962 | if (n < num_msrs_to_save) | |
963 | goto out; | |
964 | r = -EFAULT; | |
965 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, | |
966 | num_msrs_to_save * sizeof(u32))) | |
967 | goto out; | |
968 | if (copy_to_user(user_msr_list->indices | |
969 | + num_msrs_to_save * sizeof(u32), | |
970 | &emulated_msrs, | |
971 | ARRAY_SIZE(emulated_msrs) * sizeof(u32))) | |
972 | goto out; | |
973 | r = 0; | |
974 | break; | |
975 | } | |
674eea0f AK |
976 | case KVM_GET_SUPPORTED_CPUID: { |
977 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
978 | struct kvm_cpuid2 cpuid; | |
979 | ||
980 | r = -EFAULT; | |
981 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
982 | goto out; | |
983 | r = kvm_dev_ioctl_get_supported_cpuid(&cpuid, | |
984 | cpuid_arg->entries); | |
985 | if (r) | |
986 | goto out; | |
987 | ||
988 | r = -EFAULT; | |
989 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
990 | goto out; | |
991 | r = 0; | |
992 | break; | |
993 | } | |
043405e1 CO |
994 | default: |
995 | r = -EINVAL; | |
996 | } | |
997 | out: | |
998 | return r; | |
999 | } | |
1000 | ||
313a3dc7 CO |
1001 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
1002 | { | |
1003 | kvm_x86_ops->vcpu_load(vcpu, cpu); | |
18068523 | 1004 | kvm_write_guest_time(vcpu); |
313a3dc7 CO |
1005 | } |
1006 | ||
1007 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) | |
1008 | { | |
1009 | kvm_x86_ops->vcpu_put(vcpu); | |
9327fd11 | 1010 | kvm_put_guest_fpu(vcpu); |
313a3dc7 CO |
1011 | } |
1012 | ||
07716717 | 1013 | static int is_efer_nx(void) |
313a3dc7 CO |
1014 | { |
1015 | u64 efer; | |
313a3dc7 CO |
1016 | |
1017 | rdmsrl(MSR_EFER, efer); | |
07716717 DK |
1018 | return efer & EFER_NX; |
1019 | } | |
1020 | ||
1021 | static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu) | |
1022 | { | |
1023 | int i; | |
1024 | struct kvm_cpuid_entry2 *e, *entry; | |
1025 | ||
313a3dc7 | 1026 | entry = NULL; |
ad312c7c ZX |
1027 | for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { |
1028 | e = &vcpu->arch.cpuid_entries[i]; | |
313a3dc7 CO |
1029 | if (e->function == 0x80000001) { |
1030 | entry = e; | |
1031 | break; | |
1032 | } | |
1033 | } | |
07716717 | 1034 | if (entry && (entry->edx & (1 << 20)) && !is_efer_nx()) { |
313a3dc7 CO |
1035 | entry->edx &= ~(1 << 20); |
1036 | printk(KERN_INFO "kvm: guest NX capability removed\n"); | |
1037 | } | |
1038 | } | |
1039 | ||
07716717 | 1040 | /* when an old userspace process fills a new kernel module */ |
313a3dc7 CO |
1041 | static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu, |
1042 | struct kvm_cpuid *cpuid, | |
1043 | struct kvm_cpuid_entry __user *entries) | |
07716717 DK |
1044 | { |
1045 | int r, i; | |
1046 | struct kvm_cpuid_entry *cpuid_entries; | |
1047 | ||
1048 | r = -E2BIG; | |
1049 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
1050 | goto out; | |
1051 | r = -ENOMEM; | |
1052 | cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry) * cpuid->nent); | |
1053 | if (!cpuid_entries) | |
1054 | goto out; | |
1055 | r = -EFAULT; | |
1056 | if (copy_from_user(cpuid_entries, entries, | |
1057 | cpuid->nent * sizeof(struct kvm_cpuid_entry))) | |
1058 | goto out_free; | |
1059 | for (i = 0; i < cpuid->nent; i++) { | |
ad312c7c ZX |
1060 | vcpu->arch.cpuid_entries[i].function = cpuid_entries[i].function; |
1061 | vcpu->arch.cpuid_entries[i].eax = cpuid_entries[i].eax; | |
1062 | vcpu->arch.cpuid_entries[i].ebx = cpuid_entries[i].ebx; | |
1063 | vcpu->arch.cpuid_entries[i].ecx = cpuid_entries[i].ecx; | |
1064 | vcpu->arch.cpuid_entries[i].edx = cpuid_entries[i].edx; | |
1065 | vcpu->arch.cpuid_entries[i].index = 0; | |
1066 | vcpu->arch.cpuid_entries[i].flags = 0; | |
1067 | vcpu->arch.cpuid_entries[i].padding[0] = 0; | |
1068 | vcpu->arch.cpuid_entries[i].padding[1] = 0; | |
1069 | vcpu->arch.cpuid_entries[i].padding[2] = 0; | |
1070 | } | |
1071 | vcpu->arch.cpuid_nent = cpuid->nent; | |
07716717 DK |
1072 | cpuid_fix_nx_cap(vcpu); |
1073 | r = 0; | |
1074 | ||
1075 | out_free: | |
1076 | vfree(cpuid_entries); | |
1077 | out: | |
1078 | return r; | |
1079 | } | |
1080 | ||
1081 | static int kvm_vcpu_ioctl_set_cpuid2(struct kvm_vcpu *vcpu, | |
1082 | struct kvm_cpuid2 *cpuid, | |
1083 | struct kvm_cpuid_entry2 __user *entries) | |
313a3dc7 CO |
1084 | { |
1085 | int r; | |
1086 | ||
1087 | r = -E2BIG; | |
1088 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
1089 | goto out; | |
1090 | r = -EFAULT; | |
ad312c7c | 1091 | if (copy_from_user(&vcpu->arch.cpuid_entries, entries, |
07716717 | 1092 | cpuid->nent * sizeof(struct kvm_cpuid_entry2))) |
313a3dc7 | 1093 | goto out; |
ad312c7c | 1094 | vcpu->arch.cpuid_nent = cpuid->nent; |
313a3dc7 CO |
1095 | return 0; |
1096 | ||
1097 | out: | |
1098 | return r; | |
1099 | } | |
1100 | ||
07716717 DK |
1101 | static int kvm_vcpu_ioctl_get_cpuid2(struct kvm_vcpu *vcpu, |
1102 | struct kvm_cpuid2 *cpuid, | |
1103 | struct kvm_cpuid_entry2 __user *entries) | |
1104 | { | |
1105 | int r; | |
1106 | ||
1107 | r = -E2BIG; | |
ad312c7c | 1108 | if (cpuid->nent < vcpu->arch.cpuid_nent) |
07716717 DK |
1109 | goto out; |
1110 | r = -EFAULT; | |
ad312c7c ZX |
1111 | if (copy_to_user(entries, &vcpu->arch.cpuid_entries, |
1112 | vcpu->arch.cpuid_nent * sizeof(struct kvm_cpuid_entry2))) | |
07716717 DK |
1113 | goto out; |
1114 | return 0; | |
1115 | ||
1116 | out: | |
ad312c7c | 1117 | cpuid->nent = vcpu->arch.cpuid_nent; |
07716717 DK |
1118 | return r; |
1119 | } | |
1120 | ||
1121 | static inline u32 bit(int bitno) | |
1122 | { | |
1123 | return 1 << (bitno & 31); | |
1124 | } | |
1125 | ||
1126 | static void do_cpuid_1_ent(struct kvm_cpuid_entry2 *entry, u32 function, | |
1127 | u32 index) | |
1128 | { | |
1129 | entry->function = function; | |
1130 | entry->index = index; | |
1131 | cpuid_count(entry->function, entry->index, | |
1132 | &entry->eax, &entry->ebx, &entry->ecx, &entry->edx); | |
1133 | entry->flags = 0; | |
1134 | } | |
1135 | ||
1136 | static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, | |
1137 | u32 index, int *nent, int maxnent) | |
1138 | { | |
1139 | const u32 kvm_supported_word0_x86_features = bit(X86_FEATURE_FPU) | | |
1140 | bit(X86_FEATURE_VME) | bit(X86_FEATURE_DE) | | |
1141 | bit(X86_FEATURE_PSE) | bit(X86_FEATURE_TSC) | | |
1142 | bit(X86_FEATURE_MSR) | bit(X86_FEATURE_PAE) | | |
1143 | bit(X86_FEATURE_CX8) | bit(X86_FEATURE_APIC) | | |
1144 | bit(X86_FEATURE_SEP) | bit(X86_FEATURE_PGE) | | |
1145 | bit(X86_FEATURE_CMOV) | bit(X86_FEATURE_PSE36) | | |
1146 | bit(X86_FEATURE_CLFLSH) | bit(X86_FEATURE_MMX) | | |
1147 | bit(X86_FEATURE_FXSR) | bit(X86_FEATURE_XMM) | | |
1148 | bit(X86_FEATURE_XMM2) | bit(X86_FEATURE_SELFSNOOP); | |
1149 | const u32 kvm_supported_word1_x86_features = bit(X86_FEATURE_FPU) | | |
1150 | bit(X86_FEATURE_VME) | bit(X86_FEATURE_DE) | | |
1151 | bit(X86_FEATURE_PSE) | bit(X86_FEATURE_TSC) | | |
1152 | bit(X86_FEATURE_MSR) | bit(X86_FEATURE_PAE) | | |
1153 | bit(X86_FEATURE_CX8) | bit(X86_FEATURE_APIC) | | |
1154 | bit(X86_FEATURE_PGE) | | |
1155 | bit(X86_FEATURE_CMOV) | bit(X86_FEATURE_PSE36) | | |
1156 | bit(X86_FEATURE_MMX) | bit(X86_FEATURE_FXSR) | | |
1157 | bit(X86_FEATURE_SYSCALL) | | |
1158 | (bit(X86_FEATURE_NX) && is_efer_nx()) | | |
1159 | #ifdef CONFIG_X86_64 | |
1160 | bit(X86_FEATURE_LM) | | |
1161 | #endif | |
1162 | bit(X86_FEATURE_MMXEXT) | | |
1163 | bit(X86_FEATURE_3DNOWEXT) | | |
1164 | bit(X86_FEATURE_3DNOW); | |
1165 | const u32 kvm_supported_word3_x86_features = | |
1166 | bit(X86_FEATURE_XMM3) | bit(X86_FEATURE_CX16); | |
1167 | const u32 kvm_supported_word6_x86_features = | |
1168 | bit(X86_FEATURE_LAHF_LM) | bit(X86_FEATURE_CMP_LEGACY); | |
1169 | ||
1170 | /* all func 2 cpuid_count() should be called on the same cpu */ | |
1171 | get_cpu(); | |
1172 | do_cpuid_1_ent(entry, function, index); | |
1173 | ++*nent; | |
1174 | ||
1175 | switch (function) { | |
1176 | case 0: | |
1177 | entry->eax = min(entry->eax, (u32)0xb); | |
1178 | break; | |
1179 | case 1: | |
1180 | entry->edx &= kvm_supported_word0_x86_features; | |
1181 | entry->ecx &= kvm_supported_word3_x86_features; | |
1182 | break; | |
1183 | /* function 2 entries are STATEFUL. That is, repeated cpuid commands | |
1184 | * may return different values. This forces us to get_cpu() before | |
1185 | * issuing the first command, and also to emulate this annoying behavior | |
1186 | * in kvm_emulate_cpuid() using KVM_CPUID_FLAG_STATE_READ_NEXT */ | |
1187 | case 2: { | |
1188 | int t, times = entry->eax & 0xff; | |
1189 | ||
1190 | entry->flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; | |
1191 | for (t = 1; t < times && *nent < maxnent; ++t) { | |
1192 | do_cpuid_1_ent(&entry[t], function, 0); | |
1193 | entry[t].flags |= KVM_CPUID_FLAG_STATEFUL_FUNC; | |
1194 | ++*nent; | |
1195 | } | |
1196 | break; | |
1197 | } | |
1198 | /* function 4 and 0xb have additional index. */ | |
1199 | case 4: { | |
14af3f3c | 1200 | int i, cache_type; |
07716717 DK |
1201 | |
1202 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
1203 | /* read more entries until cache_type is zero */ | |
14af3f3c HH |
1204 | for (i = 1; *nent < maxnent; ++i) { |
1205 | cache_type = entry[i - 1].eax & 0x1f; | |
07716717 DK |
1206 | if (!cache_type) |
1207 | break; | |
14af3f3c HH |
1208 | do_cpuid_1_ent(&entry[i], function, i); |
1209 | entry[i].flags |= | |
07716717 DK |
1210 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
1211 | ++*nent; | |
1212 | } | |
1213 | break; | |
1214 | } | |
1215 | case 0xb: { | |
14af3f3c | 1216 | int i, level_type; |
07716717 DK |
1217 | |
1218 | entry->flags |= KVM_CPUID_FLAG_SIGNIFCANT_INDEX; | |
1219 | /* read more entries until level_type is zero */ | |
14af3f3c HH |
1220 | for (i = 1; *nent < maxnent; ++i) { |
1221 | level_type = entry[i - 1].ecx & 0xff; | |
07716717 DK |
1222 | if (!level_type) |
1223 | break; | |
14af3f3c HH |
1224 | do_cpuid_1_ent(&entry[i], function, i); |
1225 | entry[i].flags |= | |
07716717 DK |
1226 | KVM_CPUID_FLAG_SIGNIFCANT_INDEX; |
1227 | ++*nent; | |
1228 | } | |
1229 | break; | |
1230 | } | |
1231 | case 0x80000000: | |
1232 | entry->eax = min(entry->eax, 0x8000001a); | |
1233 | break; | |
1234 | case 0x80000001: | |
1235 | entry->edx &= kvm_supported_word1_x86_features; | |
1236 | entry->ecx &= kvm_supported_word6_x86_features; | |
1237 | break; | |
1238 | } | |
1239 | put_cpu(); | |
1240 | } | |
1241 | ||
674eea0f | 1242 | static int kvm_dev_ioctl_get_supported_cpuid(struct kvm_cpuid2 *cpuid, |
07716717 DK |
1243 | struct kvm_cpuid_entry2 __user *entries) |
1244 | { | |
1245 | struct kvm_cpuid_entry2 *cpuid_entries; | |
1246 | int limit, nent = 0, r = -E2BIG; | |
1247 | u32 func; | |
1248 | ||
1249 | if (cpuid->nent < 1) | |
1250 | goto out; | |
1251 | r = -ENOMEM; | |
1252 | cpuid_entries = vmalloc(sizeof(struct kvm_cpuid_entry2) * cpuid->nent); | |
1253 | if (!cpuid_entries) | |
1254 | goto out; | |
1255 | ||
1256 | do_cpuid_ent(&cpuid_entries[0], 0, 0, &nent, cpuid->nent); | |
1257 | limit = cpuid_entries[0].eax; | |
1258 | for (func = 1; func <= limit && nent < cpuid->nent; ++func) | |
1259 | do_cpuid_ent(&cpuid_entries[nent], func, 0, | |
1260 | &nent, cpuid->nent); | |
1261 | r = -E2BIG; | |
1262 | if (nent >= cpuid->nent) | |
1263 | goto out_free; | |
1264 | ||
1265 | do_cpuid_ent(&cpuid_entries[nent], 0x80000000, 0, &nent, cpuid->nent); | |
1266 | limit = cpuid_entries[nent - 1].eax; | |
1267 | for (func = 0x80000001; func <= limit && nent < cpuid->nent; ++func) | |
1268 | do_cpuid_ent(&cpuid_entries[nent], func, 0, | |
1269 | &nent, cpuid->nent); | |
1270 | r = -EFAULT; | |
1271 | if (copy_to_user(entries, cpuid_entries, | |
1272 | nent * sizeof(struct kvm_cpuid_entry2))) | |
1273 | goto out_free; | |
1274 | cpuid->nent = nent; | |
1275 | r = 0; | |
1276 | ||
1277 | out_free: | |
1278 | vfree(cpuid_entries); | |
1279 | out: | |
1280 | return r; | |
1281 | } | |
1282 | ||
313a3dc7 CO |
1283 | static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu, |
1284 | struct kvm_lapic_state *s) | |
1285 | { | |
1286 | vcpu_load(vcpu); | |
ad312c7c | 1287 | memcpy(s->regs, vcpu->arch.apic->regs, sizeof *s); |
313a3dc7 CO |
1288 | vcpu_put(vcpu); |
1289 | ||
1290 | return 0; | |
1291 | } | |
1292 | ||
1293 | static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu, | |
1294 | struct kvm_lapic_state *s) | |
1295 | { | |
1296 | vcpu_load(vcpu); | |
ad312c7c | 1297 | memcpy(vcpu->arch.apic->regs, s->regs, sizeof *s); |
313a3dc7 CO |
1298 | kvm_apic_post_state_restore(vcpu); |
1299 | vcpu_put(vcpu); | |
1300 | ||
1301 | return 0; | |
1302 | } | |
1303 | ||
f77bc6a4 ZX |
1304 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
1305 | struct kvm_interrupt *irq) | |
1306 | { | |
1307 | if (irq->irq < 0 || irq->irq >= 256) | |
1308 | return -EINVAL; | |
1309 | if (irqchip_in_kernel(vcpu->kvm)) | |
1310 | return -ENXIO; | |
1311 | vcpu_load(vcpu); | |
1312 | ||
ad312c7c ZX |
1313 | set_bit(irq->irq, vcpu->arch.irq_pending); |
1314 | set_bit(irq->irq / BITS_PER_LONG, &vcpu->arch.irq_summary); | |
f77bc6a4 ZX |
1315 | |
1316 | vcpu_put(vcpu); | |
1317 | ||
1318 | return 0; | |
1319 | } | |
1320 | ||
b209749f AK |
1321 | static int vcpu_ioctl_tpr_access_reporting(struct kvm_vcpu *vcpu, |
1322 | struct kvm_tpr_access_ctl *tac) | |
1323 | { | |
1324 | if (tac->flags) | |
1325 | return -EINVAL; | |
1326 | vcpu->arch.tpr_access_reporting = !!tac->enabled; | |
1327 | return 0; | |
1328 | } | |
1329 | ||
313a3dc7 CO |
1330 | long kvm_arch_vcpu_ioctl(struct file *filp, |
1331 | unsigned int ioctl, unsigned long arg) | |
1332 | { | |
1333 | struct kvm_vcpu *vcpu = filp->private_data; | |
1334 | void __user *argp = (void __user *)arg; | |
1335 | int r; | |
b772ff36 | 1336 | struct kvm_lapic_state *lapic = NULL; |
313a3dc7 CO |
1337 | |
1338 | switch (ioctl) { | |
1339 | case KVM_GET_LAPIC: { | |
b772ff36 | 1340 | lapic = kzalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
313a3dc7 | 1341 | |
b772ff36 DH |
1342 | r = -ENOMEM; |
1343 | if (!lapic) | |
1344 | goto out; | |
1345 | r = kvm_vcpu_ioctl_get_lapic(vcpu, lapic); | |
313a3dc7 CO |
1346 | if (r) |
1347 | goto out; | |
1348 | r = -EFAULT; | |
b772ff36 | 1349 | if (copy_to_user(argp, lapic, sizeof(struct kvm_lapic_state))) |
313a3dc7 CO |
1350 | goto out; |
1351 | r = 0; | |
1352 | break; | |
1353 | } | |
1354 | case KVM_SET_LAPIC: { | |
b772ff36 DH |
1355 | lapic = kmalloc(sizeof(struct kvm_lapic_state), GFP_KERNEL); |
1356 | r = -ENOMEM; | |
1357 | if (!lapic) | |
1358 | goto out; | |
313a3dc7 | 1359 | r = -EFAULT; |
b772ff36 | 1360 | if (copy_from_user(lapic, argp, sizeof(struct kvm_lapic_state))) |
313a3dc7 | 1361 | goto out; |
b772ff36 | 1362 | r = kvm_vcpu_ioctl_set_lapic(vcpu, lapic); |
313a3dc7 CO |
1363 | if (r) |
1364 | goto out; | |
1365 | r = 0; | |
1366 | break; | |
1367 | } | |
f77bc6a4 ZX |
1368 | case KVM_INTERRUPT: { |
1369 | struct kvm_interrupt irq; | |
1370 | ||
1371 | r = -EFAULT; | |
1372 | if (copy_from_user(&irq, argp, sizeof irq)) | |
1373 | goto out; | |
1374 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); | |
1375 | if (r) | |
1376 | goto out; | |
1377 | r = 0; | |
1378 | break; | |
1379 | } | |
313a3dc7 CO |
1380 | case KVM_SET_CPUID: { |
1381 | struct kvm_cpuid __user *cpuid_arg = argp; | |
1382 | struct kvm_cpuid cpuid; | |
1383 | ||
1384 | r = -EFAULT; | |
1385 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
1386 | goto out; | |
1387 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); | |
1388 | if (r) | |
1389 | goto out; | |
1390 | break; | |
1391 | } | |
07716717 DK |
1392 | case KVM_SET_CPUID2: { |
1393 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
1394 | struct kvm_cpuid2 cpuid; | |
1395 | ||
1396 | r = -EFAULT; | |
1397 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
1398 | goto out; | |
1399 | r = kvm_vcpu_ioctl_set_cpuid2(vcpu, &cpuid, | |
1400 | cpuid_arg->entries); | |
1401 | if (r) | |
1402 | goto out; | |
1403 | break; | |
1404 | } | |
1405 | case KVM_GET_CPUID2: { | |
1406 | struct kvm_cpuid2 __user *cpuid_arg = argp; | |
1407 | struct kvm_cpuid2 cpuid; | |
1408 | ||
1409 | r = -EFAULT; | |
1410 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
1411 | goto out; | |
1412 | r = kvm_vcpu_ioctl_get_cpuid2(vcpu, &cpuid, | |
1413 | cpuid_arg->entries); | |
1414 | if (r) | |
1415 | goto out; | |
1416 | r = -EFAULT; | |
1417 | if (copy_to_user(cpuid_arg, &cpuid, sizeof cpuid)) | |
1418 | goto out; | |
1419 | r = 0; | |
1420 | break; | |
1421 | } | |
313a3dc7 CO |
1422 | case KVM_GET_MSRS: |
1423 | r = msr_io(vcpu, argp, kvm_get_msr, 1); | |
1424 | break; | |
1425 | case KVM_SET_MSRS: | |
1426 | r = msr_io(vcpu, argp, do_set_msr, 0); | |
1427 | break; | |
b209749f AK |
1428 | case KVM_TPR_ACCESS_REPORTING: { |
1429 | struct kvm_tpr_access_ctl tac; | |
1430 | ||
1431 | r = -EFAULT; | |
1432 | if (copy_from_user(&tac, argp, sizeof tac)) | |
1433 | goto out; | |
1434 | r = vcpu_ioctl_tpr_access_reporting(vcpu, &tac); | |
1435 | if (r) | |
1436 | goto out; | |
1437 | r = -EFAULT; | |
1438 | if (copy_to_user(argp, &tac, sizeof tac)) | |
1439 | goto out; | |
1440 | r = 0; | |
1441 | break; | |
1442 | }; | |
b93463aa AK |
1443 | case KVM_SET_VAPIC_ADDR: { |
1444 | struct kvm_vapic_addr va; | |
1445 | ||
1446 | r = -EINVAL; | |
1447 | if (!irqchip_in_kernel(vcpu->kvm)) | |
1448 | goto out; | |
1449 | r = -EFAULT; | |
1450 | if (copy_from_user(&va, argp, sizeof va)) | |
1451 | goto out; | |
1452 | r = 0; | |
1453 | kvm_lapic_set_vapic_addr(vcpu, va.vapic_addr); | |
1454 | break; | |
1455 | } | |
313a3dc7 CO |
1456 | default: |
1457 | r = -EINVAL; | |
1458 | } | |
1459 | out: | |
b772ff36 DH |
1460 | if (lapic) |
1461 | kfree(lapic); | |
313a3dc7 CO |
1462 | return r; |
1463 | } | |
1464 | ||
1fe779f8 CO |
1465 | static int kvm_vm_ioctl_set_tss_addr(struct kvm *kvm, unsigned long addr) |
1466 | { | |
1467 | int ret; | |
1468 | ||
1469 | if (addr > (unsigned int)(-3 * PAGE_SIZE)) | |
1470 | return -1; | |
1471 | ret = kvm_x86_ops->set_tss_addr(kvm, addr); | |
1472 | return ret; | |
1473 | } | |
1474 | ||
1475 | static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm, | |
1476 | u32 kvm_nr_mmu_pages) | |
1477 | { | |
1478 | if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES) | |
1479 | return -EINVAL; | |
1480 | ||
72dc67a6 | 1481 | down_write(&kvm->slots_lock); |
1fe779f8 CO |
1482 | |
1483 | kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages); | |
f05e70ac | 1484 | kvm->arch.n_requested_mmu_pages = kvm_nr_mmu_pages; |
1fe779f8 | 1485 | |
72dc67a6 | 1486 | up_write(&kvm->slots_lock); |
1fe779f8 CO |
1487 | return 0; |
1488 | } | |
1489 | ||
1490 | static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm) | |
1491 | { | |
f05e70ac | 1492 | return kvm->arch.n_alloc_mmu_pages; |
1fe779f8 CO |
1493 | } |
1494 | ||
e9f85cde ZX |
1495 | gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) |
1496 | { | |
1497 | int i; | |
1498 | struct kvm_mem_alias *alias; | |
1499 | ||
d69fb81f ZX |
1500 | for (i = 0; i < kvm->arch.naliases; ++i) { |
1501 | alias = &kvm->arch.aliases[i]; | |
e9f85cde ZX |
1502 | if (gfn >= alias->base_gfn |
1503 | && gfn < alias->base_gfn + alias->npages) | |
1504 | return alias->target_gfn + gfn - alias->base_gfn; | |
1505 | } | |
1506 | return gfn; | |
1507 | } | |
1508 | ||
1fe779f8 CO |
1509 | /* |
1510 | * Set a new alias region. Aliases map a portion of physical memory into | |
1511 | * another portion. This is useful for memory windows, for example the PC | |
1512 | * VGA region. | |
1513 | */ | |
1514 | static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm, | |
1515 | struct kvm_memory_alias *alias) | |
1516 | { | |
1517 | int r, n; | |
1518 | struct kvm_mem_alias *p; | |
1519 | ||
1520 | r = -EINVAL; | |
1521 | /* General sanity checks */ | |
1522 | if (alias->memory_size & (PAGE_SIZE - 1)) | |
1523 | goto out; | |
1524 | if (alias->guest_phys_addr & (PAGE_SIZE - 1)) | |
1525 | goto out; | |
1526 | if (alias->slot >= KVM_ALIAS_SLOTS) | |
1527 | goto out; | |
1528 | if (alias->guest_phys_addr + alias->memory_size | |
1529 | < alias->guest_phys_addr) | |
1530 | goto out; | |
1531 | if (alias->target_phys_addr + alias->memory_size | |
1532 | < alias->target_phys_addr) | |
1533 | goto out; | |
1534 | ||
72dc67a6 | 1535 | down_write(&kvm->slots_lock); |
a1708ce8 | 1536 | spin_lock(&kvm->mmu_lock); |
1fe779f8 | 1537 | |
d69fb81f | 1538 | p = &kvm->arch.aliases[alias->slot]; |
1fe779f8 CO |
1539 | p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT; |
1540 | p->npages = alias->memory_size >> PAGE_SHIFT; | |
1541 | p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT; | |
1542 | ||
1543 | for (n = KVM_ALIAS_SLOTS; n > 0; --n) | |
d69fb81f | 1544 | if (kvm->arch.aliases[n - 1].npages) |
1fe779f8 | 1545 | break; |
d69fb81f | 1546 | kvm->arch.naliases = n; |
1fe779f8 | 1547 | |
a1708ce8 | 1548 | spin_unlock(&kvm->mmu_lock); |
1fe779f8 CO |
1549 | kvm_mmu_zap_all(kvm); |
1550 | ||
72dc67a6 | 1551 | up_write(&kvm->slots_lock); |
1fe779f8 CO |
1552 | |
1553 | return 0; | |
1554 | ||
1555 | out: | |
1556 | return r; | |
1557 | } | |
1558 | ||
1559 | static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
1560 | { | |
1561 | int r; | |
1562 | ||
1563 | r = 0; | |
1564 | switch (chip->chip_id) { | |
1565 | case KVM_IRQCHIP_PIC_MASTER: | |
1566 | memcpy(&chip->chip.pic, | |
1567 | &pic_irqchip(kvm)->pics[0], | |
1568 | sizeof(struct kvm_pic_state)); | |
1569 | break; | |
1570 | case KVM_IRQCHIP_PIC_SLAVE: | |
1571 | memcpy(&chip->chip.pic, | |
1572 | &pic_irqchip(kvm)->pics[1], | |
1573 | sizeof(struct kvm_pic_state)); | |
1574 | break; | |
1575 | case KVM_IRQCHIP_IOAPIC: | |
1576 | memcpy(&chip->chip.ioapic, | |
1577 | ioapic_irqchip(kvm), | |
1578 | sizeof(struct kvm_ioapic_state)); | |
1579 | break; | |
1580 | default: | |
1581 | r = -EINVAL; | |
1582 | break; | |
1583 | } | |
1584 | return r; | |
1585 | } | |
1586 | ||
1587 | static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
1588 | { | |
1589 | int r; | |
1590 | ||
1591 | r = 0; | |
1592 | switch (chip->chip_id) { | |
1593 | case KVM_IRQCHIP_PIC_MASTER: | |
1594 | memcpy(&pic_irqchip(kvm)->pics[0], | |
1595 | &chip->chip.pic, | |
1596 | sizeof(struct kvm_pic_state)); | |
1597 | break; | |
1598 | case KVM_IRQCHIP_PIC_SLAVE: | |
1599 | memcpy(&pic_irqchip(kvm)->pics[1], | |
1600 | &chip->chip.pic, | |
1601 | sizeof(struct kvm_pic_state)); | |
1602 | break; | |
1603 | case KVM_IRQCHIP_IOAPIC: | |
1604 | memcpy(ioapic_irqchip(kvm), | |
1605 | &chip->chip.ioapic, | |
1606 | sizeof(struct kvm_ioapic_state)); | |
1607 | break; | |
1608 | default: | |
1609 | r = -EINVAL; | |
1610 | break; | |
1611 | } | |
1612 | kvm_pic_update_irq(pic_irqchip(kvm)); | |
1613 | return r; | |
1614 | } | |
1615 | ||
e0f63cb9 SY |
1616 | static int kvm_vm_ioctl_get_pit(struct kvm *kvm, struct kvm_pit_state *ps) |
1617 | { | |
1618 | int r = 0; | |
1619 | ||
1620 | memcpy(ps, &kvm->arch.vpit->pit_state, sizeof(struct kvm_pit_state)); | |
1621 | return r; | |
1622 | } | |
1623 | ||
1624 | static int kvm_vm_ioctl_set_pit(struct kvm *kvm, struct kvm_pit_state *ps) | |
1625 | { | |
1626 | int r = 0; | |
1627 | ||
1628 | memcpy(&kvm->arch.vpit->pit_state, ps, sizeof(struct kvm_pit_state)); | |
1629 | kvm_pit_load_count(kvm, 0, ps->channels[0].count); | |
1630 | return r; | |
1631 | } | |
1632 | ||
5bb064dc ZX |
1633 | /* |
1634 | * Get (and clear) the dirty memory log for a memory slot. | |
1635 | */ | |
1636 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, | |
1637 | struct kvm_dirty_log *log) | |
1638 | { | |
1639 | int r; | |
1640 | int n; | |
1641 | struct kvm_memory_slot *memslot; | |
1642 | int is_dirty = 0; | |
1643 | ||
72dc67a6 | 1644 | down_write(&kvm->slots_lock); |
5bb064dc ZX |
1645 | |
1646 | r = kvm_get_dirty_log(kvm, log, &is_dirty); | |
1647 | if (r) | |
1648 | goto out; | |
1649 | ||
1650 | /* If nothing is dirty, don't bother messing with page tables. */ | |
1651 | if (is_dirty) { | |
1652 | kvm_mmu_slot_remove_write_access(kvm, log->slot); | |
1653 | kvm_flush_remote_tlbs(kvm); | |
1654 | memslot = &kvm->memslots[log->slot]; | |
1655 | n = ALIGN(memslot->npages, BITS_PER_LONG) / 8; | |
1656 | memset(memslot->dirty_bitmap, 0, n); | |
1657 | } | |
1658 | r = 0; | |
1659 | out: | |
72dc67a6 | 1660 | up_write(&kvm->slots_lock); |
5bb064dc ZX |
1661 | return r; |
1662 | } | |
1663 | ||
1fe779f8 CO |
1664 | long kvm_arch_vm_ioctl(struct file *filp, |
1665 | unsigned int ioctl, unsigned long arg) | |
1666 | { | |
1667 | struct kvm *kvm = filp->private_data; | |
1668 | void __user *argp = (void __user *)arg; | |
1669 | int r = -EINVAL; | |
f0d66275 DH |
1670 | /* |
1671 | * This union makes it completely explicit to gcc-3.x | |
1672 | * that these two variables' stack usage should be | |
1673 | * combined, not added together. | |
1674 | */ | |
1675 | union { | |
1676 | struct kvm_pit_state ps; | |
1677 | struct kvm_memory_alias alias; | |
1678 | } u; | |
1fe779f8 CO |
1679 | |
1680 | switch (ioctl) { | |
1681 | case KVM_SET_TSS_ADDR: | |
1682 | r = kvm_vm_ioctl_set_tss_addr(kvm, arg); | |
1683 | if (r < 0) | |
1684 | goto out; | |
1685 | break; | |
1686 | case KVM_SET_MEMORY_REGION: { | |
1687 | struct kvm_memory_region kvm_mem; | |
1688 | struct kvm_userspace_memory_region kvm_userspace_mem; | |
1689 | ||
1690 | r = -EFAULT; | |
1691 | if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem)) | |
1692 | goto out; | |
1693 | kvm_userspace_mem.slot = kvm_mem.slot; | |
1694 | kvm_userspace_mem.flags = kvm_mem.flags; | |
1695 | kvm_userspace_mem.guest_phys_addr = kvm_mem.guest_phys_addr; | |
1696 | kvm_userspace_mem.memory_size = kvm_mem.memory_size; | |
1697 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 0); | |
1698 | if (r) | |
1699 | goto out; | |
1700 | break; | |
1701 | } | |
1702 | case KVM_SET_NR_MMU_PAGES: | |
1703 | r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg); | |
1704 | if (r) | |
1705 | goto out; | |
1706 | break; | |
1707 | case KVM_GET_NR_MMU_PAGES: | |
1708 | r = kvm_vm_ioctl_get_nr_mmu_pages(kvm); | |
1709 | break; | |
f0d66275 | 1710 | case KVM_SET_MEMORY_ALIAS: |
1fe779f8 | 1711 | r = -EFAULT; |
f0d66275 | 1712 | if (copy_from_user(&u.alias, argp, sizeof(struct kvm_memory_alias))) |
1fe779f8 | 1713 | goto out; |
f0d66275 | 1714 | r = kvm_vm_ioctl_set_memory_alias(kvm, &u.alias); |
1fe779f8 CO |
1715 | if (r) |
1716 | goto out; | |
1717 | break; | |
1fe779f8 CO |
1718 | case KVM_CREATE_IRQCHIP: |
1719 | r = -ENOMEM; | |
d7deeeb0 ZX |
1720 | kvm->arch.vpic = kvm_create_pic(kvm); |
1721 | if (kvm->arch.vpic) { | |
1fe779f8 CO |
1722 | r = kvm_ioapic_init(kvm); |
1723 | if (r) { | |
d7deeeb0 ZX |
1724 | kfree(kvm->arch.vpic); |
1725 | kvm->arch.vpic = NULL; | |
1fe779f8 CO |
1726 | goto out; |
1727 | } | |
1728 | } else | |
1729 | goto out; | |
1730 | break; | |
7837699f SY |
1731 | case KVM_CREATE_PIT: |
1732 | r = -ENOMEM; | |
1733 | kvm->arch.vpit = kvm_create_pit(kvm); | |
1734 | if (kvm->arch.vpit) | |
1735 | r = 0; | |
1736 | break; | |
1fe779f8 CO |
1737 | case KVM_IRQ_LINE: { |
1738 | struct kvm_irq_level irq_event; | |
1739 | ||
1740 | r = -EFAULT; | |
1741 | if (copy_from_user(&irq_event, argp, sizeof irq_event)) | |
1742 | goto out; | |
1743 | if (irqchip_in_kernel(kvm)) { | |
1744 | mutex_lock(&kvm->lock); | |
5550af4d SY |
1745 | kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID, |
1746 | irq_event.irq, irq_event.level); | |
1fe779f8 CO |
1747 | mutex_unlock(&kvm->lock); |
1748 | r = 0; | |
1749 | } | |
1750 | break; | |
1751 | } | |
1752 | case KVM_GET_IRQCHIP: { | |
1753 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
f0d66275 | 1754 | struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); |
1fe779f8 | 1755 | |
f0d66275 DH |
1756 | r = -ENOMEM; |
1757 | if (!chip) | |
1fe779f8 | 1758 | goto out; |
f0d66275 DH |
1759 | r = -EFAULT; |
1760 | if (copy_from_user(chip, argp, sizeof *chip)) | |
1761 | goto get_irqchip_out; | |
1fe779f8 CO |
1762 | r = -ENXIO; |
1763 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
1764 | goto get_irqchip_out; |
1765 | r = kvm_vm_ioctl_get_irqchip(kvm, chip); | |
1fe779f8 | 1766 | if (r) |
f0d66275 | 1767 | goto get_irqchip_out; |
1fe779f8 | 1768 | r = -EFAULT; |
f0d66275 DH |
1769 | if (copy_to_user(argp, chip, sizeof *chip)) |
1770 | goto get_irqchip_out; | |
1fe779f8 | 1771 | r = 0; |
f0d66275 DH |
1772 | get_irqchip_out: |
1773 | kfree(chip); | |
1774 | if (r) | |
1775 | goto out; | |
1fe779f8 CO |
1776 | break; |
1777 | } | |
1778 | case KVM_SET_IRQCHIP: { | |
1779 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
f0d66275 | 1780 | struct kvm_irqchip *chip = kmalloc(sizeof(*chip), GFP_KERNEL); |
1fe779f8 | 1781 | |
f0d66275 DH |
1782 | r = -ENOMEM; |
1783 | if (!chip) | |
1fe779f8 | 1784 | goto out; |
f0d66275 DH |
1785 | r = -EFAULT; |
1786 | if (copy_from_user(chip, argp, sizeof *chip)) | |
1787 | goto set_irqchip_out; | |
1fe779f8 CO |
1788 | r = -ENXIO; |
1789 | if (!irqchip_in_kernel(kvm)) | |
f0d66275 DH |
1790 | goto set_irqchip_out; |
1791 | r = kvm_vm_ioctl_set_irqchip(kvm, chip); | |
1fe779f8 | 1792 | if (r) |
f0d66275 | 1793 | goto set_irqchip_out; |
1fe779f8 | 1794 | r = 0; |
f0d66275 DH |
1795 | set_irqchip_out: |
1796 | kfree(chip); | |
1797 | if (r) | |
1798 | goto out; | |
1fe779f8 CO |
1799 | break; |
1800 | } | |
e0f63cb9 | 1801 | case KVM_GET_PIT: { |
e0f63cb9 | 1802 | r = -EFAULT; |
f0d66275 | 1803 | if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
1804 | goto out; |
1805 | r = -ENXIO; | |
1806 | if (!kvm->arch.vpit) | |
1807 | goto out; | |
f0d66275 | 1808 | r = kvm_vm_ioctl_get_pit(kvm, &u.ps); |
e0f63cb9 SY |
1809 | if (r) |
1810 | goto out; | |
1811 | r = -EFAULT; | |
f0d66275 | 1812 | if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state))) |
e0f63cb9 SY |
1813 | goto out; |
1814 | r = 0; | |
1815 | break; | |
1816 | } | |
1817 | case KVM_SET_PIT: { | |
e0f63cb9 | 1818 | r = -EFAULT; |
f0d66275 | 1819 | if (copy_from_user(&u.ps, argp, sizeof u.ps)) |
e0f63cb9 SY |
1820 | goto out; |
1821 | r = -ENXIO; | |
1822 | if (!kvm->arch.vpit) | |
1823 | goto out; | |
f0d66275 | 1824 | r = kvm_vm_ioctl_set_pit(kvm, &u.ps); |
e0f63cb9 SY |
1825 | if (r) |
1826 | goto out; | |
1827 | r = 0; | |
1828 | break; | |
1829 | } | |
1fe779f8 CO |
1830 | default: |
1831 | ; | |
1832 | } | |
1833 | out: | |
1834 | return r; | |
1835 | } | |
1836 | ||
a16b043c | 1837 | static void kvm_init_msr_list(void) |
043405e1 CO |
1838 | { |
1839 | u32 dummy[2]; | |
1840 | unsigned i, j; | |
1841 | ||
1842 | for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) { | |
1843 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) | |
1844 | continue; | |
1845 | if (j < i) | |
1846 | msrs_to_save[j] = msrs_to_save[i]; | |
1847 | j++; | |
1848 | } | |
1849 | num_msrs_to_save = j; | |
1850 | } | |
1851 | ||
bbd9b64e CO |
1852 | /* |
1853 | * Only apic need an MMIO device hook, so shortcut now.. | |
1854 | */ | |
1855 | static struct kvm_io_device *vcpu_find_pervcpu_dev(struct kvm_vcpu *vcpu, | |
92760499 LV |
1856 | gpa_t addr, int len, |
1857 | int is_write) | |
bbd9b64e CO |
1858 | { |
1859 | struct kvm_io_device *dev; | |
1860 | ||
ad312c7c ZX |
1861 | if (vcpu->arch.apic) { |
1862 | dev = &vcpu->arch.apic->dev; | |
92760499 | 1863 | if (dev->in_range(dev, addr, len, is_write)) |
bbd9b64e CO |
1864 | return dev; |
1865 | } | |
1866 | return NULL; | |
1867 | } | |
1868 | ||
1869 | ||
1870 | static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu, | |
92760499 LV |
1871 | gpa_t addr, int len, |
1872 | int is_write) | |
bbd9b64e CO |
1873 | { |
1874 | struct kvm_io_device *dev; | |
1875 | ||
92760499 | 1876 | dev = vcpu_find_pervcpu_dev(vcpu, addr, len, is_write); |
bbd9b64e | 1877 | if (dev == NULL) |
92760499 LV |
1878 | dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr, len, |
1879 | is_write); | |
bbd9b64e CO |
1880 | return dev; |
1881 | } | |
1882 | ||
1883 | int emulator_read_std(unsigned long addr, | |
1884 | void *val, | |
1885 | unsigned int bytes, | |
1886 | struct kvm_vcpu *vcpu) | |
1887 | { | |
1888 | void *data = val; | |
10589a46 | 1889 | int r = X86EMUL_CONTINUE; |
bbd9b64e CO |
1890 | |
1891 | while (bytes) { | |
ad312c7c | 1892 | gpa_t gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
bbd9b64e CO |
1893 | unsigned offset = addr & (PAGE_SIZE-1); |
1894 | unsigned tocopy = min(bytes, (unsigned)PAGE_SIZE - offset); | |
1895 | int ret; | |
1896 | ||
10589a46 MT |
1897 | if (gpa == UNMAPPED_GVA) { |
1898 | r = X86EMUL_PROPAGATE_FAULT; | |
1899 | goto out; | |
1900 | } | |
bbd9b64e | 1901 | ret = kvm_read_guest(vcpu->kvm, gpa, data, tocopy); |
10589a46 MT |
1902 | if (ret < 0) { |
1903 | r = X86EMUL_UNHANDLEABLE; | |
1904 | goto out; | |
1905 | } | |
bbd9b64e CO |
1906 | |
1907 | bytes -= tocopy; | |
1908 | data += tocopy; | |
1909 | addr += tocopy; | |
1910 | } | |
10589a46 | 1911 | out: |
10589a46 | 1912 | return r; |
bbd9b64e CO |
1913 | } |
1914 | EXPORT_SYMBOL_GPL(emulator_read_std); | |
1915 | ||
bbd9b64e CO |
1916 | static int emulator_read_emulated(unsigned long addr, |
1917 | void *val, | |
1918 | unsigned int bytes, | |
1919 | struct kvm_vcpu *vcpu) | |
1920 | { | |
1921 | struct kvm_io_device *mmio_dev; | |
1922 | gpa_t gpa; | |
1923 | ||
1924 | if (vcpu->mmio_read_completed) { | |
1925 | memcpy(val, vcpu->mmio_data, bytes); | |
1926 | vcpu->mmio_read_completed = 0; | |
1927 | return X86EMUL_CONTINUE; | |
1928 | } | |
1929 | ||
ad312c7c | 1930 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
bbd9b64e CO |
1931 | |
1932 | /* For APIC access vmexit */ | |
1933 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
1934 | goto mmio; | |
1935 | ||
1936 | if (emulator_read_std(addr, val, bytes, vcpu) | |
1937 | == X86EMUL_CONTINUE) | |
1938 | return X86EMUL_CONTINUE; | |
1939 | if (gpa == UNMAPPED_GVA) | |
1940 | return X86EMUL_PROPAGATE_FAULT; | |
1941 | ||
1942 | mmio: | |
1943 | /* | |
1944 | * Is this MMIO handled locally? | |
1945 | */ | |
10589a46 | 1946 | mutex_lock(&vcpu->kvm->lock); |
92760499 | 1947 | mmio_dev = vcpu_find_mmio_dev(vcpu, gpa, bytes, 0); |
bbd9b64e CO |
1948 | if (mmio_dev) { |
1949 | kvm_iodevice_read(mmio_dev, gpa, bytes, val); | |
10589a46 | 1950 | mutex_unlock(&vcpu->kvm->lock); |
bbd9b64e CO |
1951 | return X86EMUL_CONTINUE; |
1952 | } | |
10589a46 | 1953 | mutex_unlock(&vcpu->kvm->lock); |
bbd9b64e CO |
1954 | |
1955 | vcpu->mmio_needed = 1; | |
1956 | vcpu->mmio_phys_addr = gpa; | |
1957 | vcpu->mmio_size = bytes; | |
1958 | vcpu->mmio_is_write = 0; | |
1959 | ||
1960 | return X86EMUL_UNHANDLEABLE; | |
1961 | } | |
1962 | ||
3200f405 | 1963 | int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
9f811285 | 1964 | const void *val, int bytes) |
bbd9b64e CO |
1965 | { |
1966 | int ret; | |
1967 | ||
1968 | ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes); | |
9f811285 | 1969 | if (ret < 0) |
bbd9b64e CO |
1970 | return 0; |
1971 | kvm_mmu_pte_write(vcpu, gpa, val, bytes); | |
1972 | return 1; | |
1973 | } | |
1974 | ||
1975 | static int emulator_write_emulated_onepage(unsigned long addr, | |
1976 | const void *val, | |
1977 | unsigned int bytes, | |
1978 | struct kvm_vcpu *vcpu) | |
1979 | { | |
1980 | struct kvm_io_device *mmio_dev; | |
10589a46 MT |
1981 | gpa_t gpa; |
1982 | ||
10589a46 | 1983 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
bbd9b64e CO |
1984 | |
1985 | if (gpa == UNMAPPED_GVA) { | |
c3c91fee | 1986 | kvm_inject_page_fault(vcpu, addr, 2); |
bbd9b64e CO |
1987 | return X86EMUL_PROPAGATE_FAULT; |
1988 | } | |
1989 | ||
1990 | /* For APIC access vmexit */ | |
1991 | if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
1992 | goto mmio; | |
1993 | ||
1994 | if (emulator_write_phys(vcpu, gpa, val, bytes)) | |
1995 | return X86EMUL_CONTINUE; | |
1996 | ||
1997 | mmio: | |
1998 | /* | |
1999 | * Is this MMIO handled locally? | |
2000 | */ | |
10589a46 | 2001 | mutex_lock(&vcpu->kvm->lock); |
92760499 | 2002 | mmio_dev = vcpu_find_mmio_dev(vcpu, gpa, bytes, 1); |
bbd9b64e CO |
2003 | if (mmio_dev) { |
2004 | kvm_iodevice_write(mmio_dev, gpa, bytes, val); | |
10589a46 | 2005 | mutex_unlock(&vcpu->kvm->lock); |
bbd9b64e CO |
2006 | return X86EMUL_CONTINUE; |
2007 | } | |
10589a46 | 2008 | mutex_unlock(&vcpu->kvm->lock); |
bbd9b64e CO |
2009 | |
2010 | vcpu->mmio_needed = 1; | |
2011 | vcpu->mmio_phys_addr = gpa; | |
2012 | vcpu->mmio_size = bytes; | |
2013 | vcpu->mmio_is_write = 1; | |
2014 | memcpy(vcpu->mmio_data, val, bytes); | |
2015 | ||
2016 | return X86EMUL_CONTINUE; | |
2017 | } | |
2018 | ||
2019 | int emulator_write_emulated(unsigned long addr, | |
2020 | const void *val, | |
2021 | unsigned int bytes, | |
2022 | struct kvm_vcpu *vcpu) | |
2023 | { | |
2024 | /* Crossing a page boundary? */ | |
2025 | if (((addr + bytes - 1) ^ addr) & PAGE_MASK) { | |
2026 | int rc, now; | |
2027 | ||
2028 | now = -addr & ~PAGE_MASK; | |
2029 | rc = emulator_write_emulated_onepage(addr, val, now, vcpu); | |
2030 | if (rc != X86EMUL_CONTINUE) | |
2031 | return rc; | |
2032 | addr += now; | |
2033 | val += now; | |
2034 | bytes -= now; | |
2035 | } | |
2036 | return emulator_write_emulated_onepage(addr, val, bytes, vcpu); | |
2037 | } | |
2038 | EXPORT_SYMBOL_GPL(emulator_write_emulated); | |
2039 | ||
2040 | static int emulator_cmpxchg_emulated(unsigned long addr, | |
2041 | const void *old, | |
2042 | const void *new, | |
2043 | unsigned int bytes, | |
2044 | struct kvm_vcpu *vcpu) | |
2045 | { | |
2046 | static int reported; | |
2047 | ||
2048 | if (!reported) { | |
2049 | reported = 1; | |
2050 | printk(KERN_WARNING "kvm: emulating exchange as write\n"); | |
2051 | } | |
2bacc55c MT |
2052 | #ifndef CONFIG_X86_64 |
2053 | /* guests cmpxchg8b have to be emulated atomically */ | |
2054 | if (bytes == 8) { | |
10589a46 | 2055 | gpa_t gpa; |
2bacc55c | 2056 | struct page *page; |
c0b49b0d | 2057 | char *kaddr; |
2bacc55c MT |
2058 | u64 val; |
2059 | ||
10589a46 MT |
2060 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, addr); |
2061 | ||
2bacc55c MT |
2062 | if (gpa == UNMAPPED_GVA || |
2063 | (gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE) | |
2064 | goto emul_write; | |
2065 | ||
2066 | if (((gpa + bytes - 1) & PAGE_MASK) != (gpa & PAGE_MASK)) | |
2067 | goto emul_write; | |
2068 | ||
2069 | val = *(u64 *)new; | |
72dc67a6 | 2070 | |
2bacc55c | 2071 | page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT); |
72dc67a6 | 2072 | |
c0b49b0d AM |
2073 | kaddr = kmap_atomic(page, KM_USER0); |
2074 | set_64bit((u64 *)(kaddr + offset_in_page(gpa)), val); | |
2075 | kunmap_atomic(kaddr, KM_USER0); | |
2bacc55c MT |
2076 | kvm_release_page_dirty(page); |
2077 | } | |
3200f405 | 2078 | emul_write: |
2bacc55c MT |
2079 | #endif |
2080 | ||
bbd9b64e CO |
2081 | return emulator_write_emulated(addr, new, bytes, vcpu); |
2082 | } | |
2083 | ||
2084 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) | |
2085 | { | |
2086 | return kvm_x86_ops->get_segment_base(vcpu, seg); | |
2087 | } | |
2088 | ||
2089 | int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address) | |
2090 | { | |
a7052897 | 2091 | kvm_mmu_invlpg(vcpu, address); |
bbd9b64e CO |
2092 | return X86EMUL_CONTINUE; |
2093 | } | |
2094 | ||
2095 | int emulate_clts(struct kvm_vcpu *vcpu) | |
2096 | { | |
54e445ca | 2097 | KVMTRACE_0D(CLTS, vcpu, handler); |
ad312c7c | 2098 | kvm_x86_ops->set_cr0(vcpu, vcpu->arch.cr0 & ~X86_CR0_TS); |
bbd9b64e CO |
2099 | return X86EMUL_CONTINUE; |
2100 | } | |
2101 | ||
2102 | int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest) | |
2103 | { | |
2104 | struct kvm_vcpu *vcpu = ctxt->vcpu; | |
2105 | ||
2106 | switch (dr) { | |
2107 | case 0 ... 3: | |
2108 | *dest = kvm_x86_ops->get_dr(vcpu, dr); | |
2109 | return X86EMUL_CONTINUE; | |
2110 | default: | |
b8688d51 | 2111 | pr_unimpl(vcpu, "%s: unexpected dr %u\n", __func__, dr); |
bbd9b64e CO |
2112 | return X86EMUL_UNHANDLEABLE; |
2113 | } | |
2114 | } | |
2115 | ||
2116 | int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value) | |
2117 | { | |
2118 | unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U; | |
2119 | int exception; | |
2120 | ||
2121 | kvm_x86_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception); | |
2122 | if (exception) { | |
2123 | /* FIXME: better handling */ | |
2124 | return X86EMUL_UNHANDLEABLE; | |
2125 | } | |
2126 | return X86EMUL_CONTINUE; | |
2127 | } | |
2128 | ||
2129 | void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context) | |
2130 | { | |
bbd9b64e | 2131 | u8 opcodes[4]; |
5fdbf976 | 2132 | unsigned long rip = kvm_rip_read(vcpu); |
bbd9b64e CO |
2133 | unsigned long rip_linear; |
2134 | ||
f76c710d | 2135 | if (!printk_ratelimit()) |
bbd9b64e CO |
2136 | return; |
2137 | ||
25be4608 GC |
2138 | rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS); |
2139 | ||
bbd9b64e CO |
2140 | emulator_read_std(rip_linear, (void *)opcodes, 4, vcpu); |
2141 | ||
2142 | printk(KERN_ERR "emulation failed (%s) rip %lx %02x %02x %02x %02x\n", | |
2143 | context, rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]); | |
bbd9b64e CO |
2144 | } |
2145 | EXPORT_SYMBOL_GPL(kvm_report_emulation_failure); | |
2146 | ||
14af3f3c | 2147 | static struct x86_emulate_ops emulate_ops = { |
bbd9b64e | 2148 | .read_std = emulator_read_std, |
bbd9b64e CO |
2149 | .read_emulated = emulator_read_emulated, |
2150 | .write_emulated = emulator_write_emulated, | |
2151 | .cmpxchg_emulated = emulator_cmpxchg_emulated, | |
2152 | }; | |
2153 | ||
5fdbf976 MT |
2154 | static void cache_all_regs(struct kvm_vcpu *vcpu) |
2155 | { | |
2156 | kvm_register_read(vcpu, VCPU_REGS_RAX); | |
2157 | kvm_register_read(vcpu, VCPU_REGS_RSP); | |
2158 | kvm_register_read(vcpu, VCPU_REGS_RIP); | |
2159 | vcpu->arch.regs_dirty = ~0; | |
2160 | } | |
2161 | ||
bbd9b64e CO |
2162 | int emulate_instruction(struct kvm_vcpu *vcpu, |
2163 | struct kvm_run *run, | |
2164 | unsigned long cr2, | |
2165 | u16 error_code, | |
571008da | 2166 | int emulation_type) |
bbd9b64e CO |
2167 | { |
2168 | int r; | |
571008da | 2169 | struct decode_cache *c; |
bbd9b64e | 2170 | |
26eef70c | 2171 | kvm_clear_exception_queue(vcpu); |
ad312c7c | 2172 | vcpu->arch.mmio_fault_cr2 = cr2; |
5fdbf976 MT |
2173 | /* |
2174 | * TODO: fix x86_emulate.c to use guest_read/write_register | |
2175 | * instead of direct ->regs accesses, can save hundred cycles | |
2176 | * on Intel for instructions that don't read/change RSP, for | |
2177 | * for example. | |
2178 | */ | |
2179 | cache_all_regs(vcpu); | |
bbd9b64e CO |
2180 | |
2181 | vcpu->mmio_is_write = 0; | |
ad312c7c | 2182 | vcpu->arch.pio.string = 0; |
bbd9b64e | 2183 | |
571008da | 2184 | if (!(emulation_type & EMULTYPE_NO_DECODE)) { |
bbd9b64e CO |
2185 | int cs_db, cs_l; |
2186 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
2187 | ||
ad312c7c ZX |
2188 | vcpu->arch.emulate_ctxt.vcpu = vcpu; |
2189 | vcpu->arch.emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu); | |
2190 | vcpu->arch.emulate_ctxt.mode = | |
2191 | (vcpu->arch.emulate_ctxt.eflags & X86_EFLAGS_VM) | |
bbd9b64e CO |
2192 | ? X86EMUL_MODE_REAL : cs_l |
2193 | ? X86EMUL_MODE_PROT64 : cs_db | |
2194 | ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16; | |
2195 | ||
ad312c7c | 2196 | r = x86_decode_insn(&vcpu->arch.emulate_ctxt, &emulate_ops); |
571008da SY |
2197 | |
2198 | /* Reject the instructions other than VMCALL/VMMCALL when | |
2199 | * try to emulate invalid opcode */ | |
2200 | c = &vcpu->arch.emulate_ctxt.decode; | |
2201 | if ((emulation_type & EMULTYPE_TRAP_UD) && | |
2202 | (!(c->twobyte && c->b == 0x01 && | |
2203 | (c->modrm_reg == 0 || c->modrm_reg == 3) && | |
2204 | c->modrm_mod == 3 && c->modrm_rm == 1))) | |
2205 | return EMULATE_FAIL; | |
2206 | ||
f2b5756b | 2207 | ++vcpu->stat.insn_emulation; |
bbd9b64e | 2208 | if (r) { |
f2b5756b | 2209 | ++vcpu->stat.insn_emulation_fail; |
bbd9b64e CO |
2210 | if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) |
2211 | return EMULATE_DONE; | |
2212 | return EMULATE_FAIL; | |
2213 | } | |
2214 | } | |
2215 | ||
ad312c7c | 2216 | r = x86_emulate_insn(&vcpu->arch.emulate_ctxt, &emulate_ops); |
bbd9b64e | 2217 | |
ad312c7c | 2218 | if (vcpu->arch.pio.string) |
bbd9b64e CO |
2219 | return EMULATE_DO_MMIO; |
2220 | ||
2221 | if ((r || vcpu->mmio_is_write) && run) { | |
2222 | run->exit_reason = KVM_EXIT_MMIO; | |
2223 | run->mmio.phys_addr = vcpu->mmio_phys_addr; | |
2224 | memcpy(run->mmio.data, vcpu->mmio_data, 8); | |
2225 | run->mmio.len = vcpu->mmio_size; | |
2226 | run->mmio.is_write = vcpu->mmio_is_write; | |
2227 | } | |
2228 | ||
2229 | if (r) { | |
2230 | if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) | |
2231 | return EMULATE_DONE; | |
2232 | if (!vcpu->mmio_needed) { | |
2233 | kvm_report_emulation_failure(vcpu, "mmio"); | |
2234 | return EMULATE_FAIL; | |
2235 | } | |
2236 | return EMULATE_DO_MMIO; | |
2237 | } | |
2238 | ||
ad312c7c | 2239 | kvm_x86_ops->set_rflags(vcpu, vcpu->arch.emulate_ctxt.eflags); |
bbd9b64e CO |
2240 | |
2241 | if (vcpu->mmio_is_write) { | |
2242 | vcpu->mmio_needed = 0; | |
2243 | return EMULATE_DO_MMIO; | |
2244 | } | |
2245 | ||
2246 | return EMULATE_DONE; | |
2247 | } | |
2248 | EXPORT_SYMBOL_GPL(emulate_instruction); | |
2249 | ||
de7d789a CO |
2250 | static void free_pio_guest_pages(struct kvm_vcpu *vcpu) |
2251 | { | |
2252 | int i; | |
2253 | ||
ad312c7c ZX |
2254 | for (i = 0; i < ARRAY_SIZE(vcpu->arch.pio.guest_pages); ++i) |
2255 | if (vcpu->arch.pio.guest_pages[i]) { | |
2256 | kvm_release_page_dirty(vcpu->arch.pio.guest_pages[i]); | |
2257 | vcpu->arch.pio.guest_pages[i] = NULL; | |
de7d789a CO |
2258 | } |
2259 | } | |
2260 | ||
2261 | static int pio_copy_data(struct kvm_vcpu *vcpu) | |
2262 | { | |
ad312c7c | 2263 | void *p = vcpu->arch.pio_data; |
de7d789a CO |
2264 | void *q; |
2265 | unsigned bytes; | |
ad312c7c | 2266 | int nr_pages = vcpu->arch.pio.guest_pages[1] ? 2 : 1; |
de7d789a | 2267 | |
ad312c7c | 2268 | q = vmap(vcpu->arch.pio.guest_pages, nr_pages, VM_READ|VM_WRITE, |
de7d789a CO |
2269 | PAGE_KERNEL); |
2270 | if (!q) { | |
2271 | free_pio_guest_pages(vcpu); | |
2272 | return -ENOMEM; | |
2273 | } | |
ad312c7c ZX |
2274 | q += vcpu->arch.pio.guest_page_offset; |
2275 | bytes = vcpu->arch.pio.size * vcpu->arch.pio.cur_count; | |
2276 | if (vcpu->arch.pio.in) | |
de7d789a CO |
2277 | memcpy(q, p, bytes); |
2278 | else | |
2279 | memcpy(p, q, bytes); | |
ad312c7c | 2280 | q -= vcpu->arch.pio.guest_page_offset; |
de7d789a CO |
2281 | vunmap(q); |
2282 | free_pio_guest_pages(vcpu); | |
2283 | return 0; | |
2284 | } | |
2285 | ||
2286 | int complete_pio(struct kvm_vcpu *vcpu) | |
2287 | { | |
ad312c7c | 2288 | struct kvm_pio_request *io = &vcpu->arch.pio; |
de7d789a CO |
2289 | long delta; |
2290 | int r; | |
5fdbf976 | 2291 | unsigned long val; |
de7d789a CO |
2292 | |
2293 | if (!io->string) { | |
5fdbf976 MT |
2294 | if (io->in) { |
2295 | val = kvm_register_read(vcpu, VCPU_REGS_RAX); | |
2296 | memcpy(&val, vcpu->arch.pio_data, io->size); | |
2297 | kvm_register_write(vcpu, VCPU_REGS_RAX, val); | |
2298 | } | |
de7d789a CO |
2299 | } else { |
2300 | if (io->in) { | |
2301 | r = pio_copy_data(vcpu); | |
5fdbf976 | 2302 | if (r) |
de7d789a | 2303 | return r; |
de7d789a CO |
2304 | } |
2305 | ||
2306 | delta = 1; | |
2307 | if (io->rep) { | |
2308 | delta *= io->cur_count; | |
2309 | /* | |
2310 | * The size of the register should really depend on | |
2311 | * current address size. | |
2312 | */ | |
5fdbf976 MT |
2313 | val = kvm_register_read(vcpu, VCPU_REGS_RCX); |
2314 | val -= delta; | |
2315 | kvm_register_write(vcpu, VCPU_REGS_RCX, val); | |
de7d789a CO |
2316 | } |
2317 | if (io->down) | |
2318 | delta = -delta; | |
2319 | delta *= io->size; | |
5fdbf976 MT |
2320 | if (io->in) { |
2321 | val = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
2322 | val += delta; | |
2323 | kvm_register_write(vcpu, VCPU_REGS_RDI, val); | |
2324 | } else { | |
2325 | val = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
2326 | val += delta; | |
2327 | kvm_register_write(vcpu, VCPU_REGS_RSI, val); | |
2328 | } | |
de7d789a CO |
2329 | } |
2330 | ||
de7d789a CO |
2331 | io->count -= io->cur_count; |
2332 | io->cur_count = 0; | |
2333 | ||
2334 | return 0; | |
2335 | } | |
2336 | ||
2337 | static void kernel_pio(struct kvm_io_device *pio_dev, | |
2338 | struct kvm_vcpu *vcpu, | |
2339 | void *pd) | |
2340 | { | |
2341 | /* TODO: String I/O for in kernel device */ | |
2342 | ||
2343 | mutex_lock(&vcpu->kvm->lock); | |
ad312c7c ZX |
2344 | if (vcpu->arch.pio.in) |
2345 | kvm_iodevice_read(pio_dev, vcpu->arch.pio.port, | |
2346 | vcpu->arch.pio.size, | |
de7d789a CO |
2347 | pd); |
2348 | else | |
ad312c7c ZX |
2349 | kvm_iodevice_write(pio_dev, vcpu->arch.pio.port, |
2350 | vcpu->arch.pio.size, | |
de7d789a CO |
2351 | pd); |
2352 | mutex_unlock(&vcpu->kvm->lock); | |
2353 | } | |
2354 | ||
2355 | static void pio_string_write(struct kvm_io_device *pio_dev, | |
2356 | struct kvm_vcpu *vcpu) | |
2357 | { | |
ad312c7c ZX |
2358 | struct kvm_pio_request *io = &vcpu->arch.pio; |
2359 | void *pd = vcpu->arch.pio_data; | |
de7d789a CO |
2360 | int i; |
2361 | ||
2362 | mutex_lock(&vcpu->kvm->lock); | |
2363 | for (i = 0; i < io->cur_count; i++) { | |
2364 | kvm_iodevice_write(pio_dev, io->port, | |
2365 | io->size, | |
2366 | pd); | |
2367 | pd += io->size; | |
2368 | } | |
2369 | mutex_unlock(&vcpu->kvm->lock); | |
2370 | } | |
2371 | ||
2372 | static struct kvm_io_device *vcpu_find_pio_dev(struct kvm_vcpu *vcpu, | |
92760499 LV |
2373 | gpa_t addr, int len, |
2374 | int is_write) | |
de7d789a | 2375 | { |
92760499 | 2376 | return kvm_io_bus_find_dev(&vcpu->kvm->pio_bus, addr, len, is_write); |
de7d789a CO |
2377 | } |
2378 | ||
2379 | int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, | |
2380 | int size, unsigned port) | |
2381 | { | |
2382 | struct kvm_io_device *pio_dev; | |
5fdbf976 | 2383 | unsigned long val; |
de7d789a CO |
2384 | |
2385 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
2386 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; | |
ad312c7c | 2387 | vcpu->run->io.size = vcpu->arch.pio.size = size; |
de7d789a | 2388 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; |
ad312c7c ZX |
2389 | vcpu->run->io.count = vcpu->arch.pio.count = vcpu->arch.pio.cur_count = 1; |
2390 | vcpu->run->io.port = vcpu->arch.pio.port = port; | |
2391 | vcpu->arch.pio.in = in; | |
2392 | vcpu->arch.pio.string = 0; | |
2393 | vcpu->arch.pio.down = 0; | |
2394 | vcpu->arch.pio.guest_page_offset = 0; | |
2395 | vcpu->arch.pio.rep = 0; | |
de7d789a | 2396 | |
2714d1d3 FEL |
2397 | if (vcpu->run->io.direction == KVM_EXIT_IO_IN) |
2398 | KVMTRACE_2D(IO_READ, vcpu, vcpu->run->io.port, (u32)size, | |
2399 | handler); | |
2400 | else | |
2401 | KVMTRACE_2D(IO_WRITE, vcpu, vcpu->run->io.port, (u32)size, | |
2402 | handler); | |
2403 | ||
5fdbf976 MT |
2404 | val = kvm_register_read(vcpu, VCPU_REGS_RAX); |
2405 | memcpy(vcpu->arch.pio_data, &val, 4); | |
de7d789a CO |
2406 | |
2407 | kvm_x86_ops->skip_emulated_instruction(vcpu); | |
2408 | ||
92760499 | 2409 | pio_dev = vcpu_find_pio_dev(vcpu, port, size, !in); |
de7d789a | 2410 | if (pio_dev) { |
ad312c7c | 2411 | kernel_pio(pio_dev, vcpu, vcpu->arch.pio_data); |
de7d789a CO |
2412 | complete_pio(vcpu); |
2413 | return 1; | |
2414 | } | |
2415 | return 0; | |
2416 | } | |
2417 | EXPORT_SYMBOL_GPL(kvm_emulate_pio); | |
2418 | ||
2419 | int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, | |
2420 | int size, unsigned long count, int down, | |
2421 | gva_t address, int rep, unsigned port) | |
2422 | { | |
2423 | unsigned now, in_page; | |
2424 | int i, ret = 0; | |
2425 | int nr_pages = 1; | |
2426 | struct page *page; | |
2427 | struct kvm_io_device *pio_dev; | |
2428 | ||
2429 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
2430 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; | |
ad312c7c | 2431 | vcpu->run->io.size = vcpu->arch.pio.size = size; |
de7d789a | 2432 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; |
ad312c7c ZX |
2433 | vcpu->run->io.count = vcpu->arch.pio.count = vcpu->arch.pio.cur_count = count; |
2434 | vcpu->run->io.port = vcpu->arch.pio.port = port; | |
2435 | vcpu->arch.pio.in = in; | |
2436 | vcpu->arch.pio.string = 1; | |
2437 | vcpu->arch.pio.down = down; | |
2438 | vcpu->arch.pio.guest_page_offset = offset_in_page(address); | |
2439 | vcpu->arch.pio.rep = rep; | |
de7d789a | 2440 | |
2714d1d3 FEL |
2441 | if (vcpu->run->io.direction == KVM_EXIT_IO_IN) |
2442 | KVMTRACE_2D(IO_READ, vcpu, vcpu->run->io.port, (u32)size, | |
2443 | handler); | |
2444 | else | |
2445 | KVMTRACE_2D(IO_WRITE, vcpu, vcpu->run->io.port, (u32)size, | |
2446 | handler); | |
2447 | ||
de7d789a CO |
2448 | if (!count) { |
2449 | kvm_x86_ops->skip_emulated_instruction(vcpu); | |
2450 | return 1; | |
2451 | } | |
2452 | ||
2453 | if (!down) | |
2454 | in_page = PAGE_SIZE - offset_in_page(address); | |
2455 | else | |
2456 | in_page = offset_in_page(address) + size; | |
2457 | now = min(count, (unsigned long)in_page / size); | |
2458 | if (!now) { | |
2459 | /* | |
2460 | * String I/O straddles page boundary. Pin two guest pages | |
2461 | * so that we satisfy atomicity constraints. Do just one | |
2462 | * transaction to avoid complexity. | |
2463 | */ | |
2464 | nr_pages = 2; | |
2465 | now = 1; | |
2466 | } | |
2467 | if (down) { | |
2468 | /* | |
2469 | * String I/O in reverse. Yuck. Kill the guest, fix later. | |
2470 | */ | |
2471 | pr_unimpl(vcpu, "guest string pio down\n"); | |
c1a5d4f9 | 2472 | kvm_inject_gp(vcpu, 0); |
de7d789a CO |
2473 | return 1; |
2474 | } | |
2475 | vcpu->run->io.count = now; | |
ad312c7c | 2476 | vcpu->arch.pio.cur_count = now; |
de7d789a | 2477 | |
ad312c7c | 2478 | if (vcpu->arch.pio.cur_count == vcpu->arch.pio.count) |
de7d789a CO |
2479 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
2480 | ||
2481 | for (i = 0; i < nr_pages; ++i) { | |
de7d789a | 2482 | page = gva_to_page(vcpu, address + i * PAGE_SIZE); |
ad312c7c | 2483 | vcpu->arch.pio.guest_pages[i] = page; |
de7d789a | 2484 | if (!page) { |
c1a5d4f9 | 2485 | kvm_inject_gp(vcpu, 0); |
de7d789a CO |
2486 | free_pio_guest_pages(vcpu); |
2487 | return 1; | |
2488 | } | |
2489 | } | |
2490 | ||
92760499 LV |
2491 | pio_dev = vcpu_find_pio_dev(vcpu, port, |
2492 | vcpu->arch.pio.cur_count, | |
2493 | !vcpu->arch.pio.in); | |
ad312c7c | 2494 | if (!vcpu->arch.pio.in) { |
de7d789a CO |
2495 | /* string PIO write */ |
2496 | ret = pio_copy_data(vcpu); | |
2497 | if (ret >= 0 && pio_dev) { | |
2498 | pio_string_write(pio_dev, vcpu); | |
2499 | complete_pio(vcpu); | |
ad312c7c | 2500 | if (vcpu->arch.pio.count == 0) |
de7d789a CO |
2501 | ret = 1; |
2502 | } | |
2503 | } else if (pio_dev) | |
2504 | pr_unimpl(vcpu, "no string pio read support yet, " | |
2505 | "port %x size %d count %ld\n", | |
2506 | port, size, count); | |
2507 | ||
2508 | return ret; | |
2509 | } | |
2510 | EXPORT_SYMBOL_GPL(kvm_emulate_pio_string); | |
2511 | ||
f8c16bba | 2512 | int kvm_arch_init(void *opaque) |
043405e1 | 2513 | { |
56c6d28a | 2514 | int r; |
f8c16bba ZX |
2515 | struct kvm_x86_ops *ops = (struct kvm_x86_ops *)opaque; |
2516 | ||
f8c16bba ZX |
2517 | if (kvm_x86_ops) { |
2518 | printk(KERN_ERR "kvm: already loaded the other module\n"); | |
56c6d28a ZX |
2519 | r = -EEXIST; |
2520 | goto out; | |
f8c16bba ZX |
2521 | } |
2522 | ||
2523 | if (!ops->cpu_has_kvm_support()) { | |
2524 | printk(KERN_ERR "kvm: no hardware support\n"); | |
56c6d28a ZX |
2525 | r = -EOPNOTSUPP; |
2526 | goto out; | |
f8c16bba ZX |
2527 | } |
2528 | if (ops->disabled_by_bios()) { | |
2529 | printk(KERN_ERR "kvm: disabled by bios\n"); | |
56c6d28a ZX |
2530 | r = -EOPNOTSUPP; |
2531 | goto out; | |
f8c16bba ZX |
2532 | } |
2533 | ||
97db56ce AK |
2534 | r = kvm_mmu_module_init(); |
2535 | if (r) | |
2536 | goto out; | |
2537 | ||
2538 | kvm_init_msr_list(); | |
2539 | ||
f8c16bba | 2540 | kvm_x86_ops = ops; |
56c6d28a | 2541 | kvm_mmu_set_nonpresent_ptes(0ull, 0ull); |
7b52345e SY |
2542 | kvm_mmu_set_base_ptes(PT_PRESENT_MASK); |
2543 | kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK, | |
2544 | PT_DIRTY_MASK, PT64_NX_MASK, 0); | |
f8c16bba | 2545 | return 0; |
56c6d28a ZX |
2546 | |
2547 | out: | |
56c6d28a | 2548 | return r; |
043405e1 | 2549 | } |
8776e519 | 2550 | |
f8c16bba ZX |
2551 | void kvm_arch_exit(void) |
2552 | { | |
2553 | kvm_x86_ops = NULL; | |
56c6d28a ZX |
2554 | kvm_mmu_module_exit(); |
2555 | } | |
f8c16bba | 2556 | |
8776e519 HB |
2557 | int kvm_emulate_halt(struct kvm_vcpu *vcpu) |
2558 | { | |
2559 | ++vcpu->stat.halt_exits; | |
2714d1d3 | 2560 | KVMTRACE_0D(HLT, vcpu, handler); |
8776e519 | 2561 | if (irqchip_in_kernel(vcpu->kvm)) { |
a4535290 | 2562 | vcpu->arch.mp_state = KVM_MP_STATE_HALTED; |
8776e519 HB |
2563 | return 1; |
2564 | } else { | |
2565 | vcpu->run->exit_reason = KVM_EXIT_HLT; | |
2566 | return 0; | |
2567 | } | |
2568 | } | |
2569 | EXPORT_SYMBOL_GPL(kvm_emulate_halt); | |
2570 | ||
2f333bcb MT |
2571 | static inline gpa_t hc_gpa(struct kvm_vcpu *vcpu, unsigned long a0, |
2572 | unsigned long a1) | |
2573 | { | |
2574 | if (is_long_mode(vcpu)) | |
2575 | return a0; | |
2576 | else | |
2577 | return a0 | ((gpa_t)a1 << 32); | |
2578 | } | |
2579 | ||
8776e519 HB |
2580 | int kvm_emulate_hypercall(struct kvm_vcpu *vcpu) |
2581 | { | |
2582 | unsigned long nr, a0, a1, a2, a3, ret; | |
2f333bcb | 2583 | int r = 1; |
8776e519 | 2584 | |
5fdbf976 MT |
2585 | nr = kvm_register_read(vcpu, VCPU_REGS_RAX); |
2586 | a0 = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
2587 | a1 = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
2588 | a2 = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
2589 | a3 = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
8776e519 | 2590 | |
2714d1d3 FEL |
2591 | KVMTRACE_1D(VMMCALL, vcpu, (u32)nr, handler); |
2592 | ||
8776e519 HB |
2593 | if (!is_long_mode(vcpu)) { |
2594 | nr &= 0xFFFFFFFF; | |
2595 | a0 &= 0xFFFFFFFF; | |
2596 | a1 &= 0xFFFFFFFF; | |
2597 | a2 &= 0xFFFFFFFF; | |
2598 | a3 &= 0xFFFFFFFF; | |
2599 | } | |
2600 | ||
2601 | switch (nr) { | |
b93463aa AK |
2602 | case KVM_HC_VAPIC_POLL_IRQ: |
2603 | ret = 0; | |
2604 | break; | |
2f333bcb MT |
2605 | case KVM_HC_MMU_OP: |
2606 | r = kvm_pv_mmu_op(vcpu, a0, hc_gpa(vcpu, a1, a2), &ret); | |
2607 | break; | |
8776e519 HB |
2608 | default: |
2609 | ret = -KVM_ENOSYS; | |
2610 | break; | |
2611 | } | |
5fdbf976 | 2612 | kvm_register_write(vcpu, VCPU_REGS_RAX, ret); |
f11c3a8d | 2613 | ++vcpu->stat.hypercalls; |
2f333bcb | 2614 | return r; |
8776e519 HB |
2615 | } |
2616 | EXPORT_SYMBOL_GPL(kvm_emulate_hypercall); | |
2617 | ||
2618 | int kvm_fix_hypercall(struct kvm_vcpu *vcpu) | |
2619 | { | |
2620 | char instruction[3]; | |
2621 | int ret = 0; | |
5fdbf976 | 2622 | unsigned long rip = kvm_rip_read(vcpu); |
8776e519 | 2623 | |
8776e519 HB |
2624 | |
2625 | /* | |
2626 | * Blow out the MMU to ensure that no other VCPU has an active mapping | |
2627 | * to ensure that the updated hypercall appears atomically across all | |
2628 | * VCPUs. | |
2629 | */ | |
2630 | kvm_mmu_zap_all(vcpu->kvm); | |
2631 | ||
8776e519 | 2632 | kvm_x86_ops->patch_hypercall(vcpu, instruction); |
5fdbf976 | 2633 | if (emulator_write_emulated(rip, instruction, 3, vcpu) |
8776e519 HB |
2634 | != X86EMUL_CONTINUE) |
2635 | ret = -EFAULT; | |
2636 | ||
8776e519 HB |
2637 | return ret; |
2638 | } | |
2639 | ||
2640 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) | |
2641 | { | |
2642 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; | |
2643 | } | |
2644 | ||
2645 | void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
2646 | { | |
2647 | struct descriptor_table dt = { limit, base }; | |
2648 | ||
2649 | kvm_x86_ops->set_gdt(vcpu, &dt); | |
2650 | } | |
2651 | ||
2652 | void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
2653 | { | |
2654 | struct descriptor_table dt = { limit, base }; | |
2655 | ||
2656 | kvm_x86_ops->set_idt(vcpu, &dt); | |
2657 | } | |
2658 | ||
2659 | void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw, | |
2660 | unsigned long *rflags) | |
2661 | { | |
2d3ad1f4 | 2662 | kvm_lmsw(vcpu, msw); |
8776e519 HB |
2663 | *rflags = kvm_x86_ops->get_rflags(vcpu); |
2664 | } | |
2665 | ||
2666 | unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr) | |
2667 | { | |
54e445ca JR |
2668 | unsigned long value; |
2669 | ||
8776e519 HB |
2670 | kvm_x86_ops->decache_cr4_guest_bits(vcpu); |
2671 | switch (cr) { | |
2672 | case 0: | |
54e445ca JR |
2673 | value = vcpu->arch.cr0; |
2674 | break; | |
8776e519 | 2675 | case 2: |
54e445ca JR |
2676 | value = vcpu->arch.cr2; |
2677 | break; | |
8776e519 | 2678 | case 3: |
54e445ca JR |
2679 | value = vcpu->arch.cr3; |
2680 | break; | |
8776e519 | 2681 | case 4: |
54e445ca JR |
2682 | value = vcpu->arch.cr4; |
2683 | break; | |
152ff9be | 2684 | case 8: |
54e445ca JR |
2685 | value = kvm_get_cr8(vcpu); |
2686 | break; | |
8776e519 | 2687 | default: |
b8688d51 | 2688 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr); |
8776e519 HB |
2689 | return 0; |
2690 | } | |
54e445ca JR |
2691 | KVMTRACE_3D(CR_READ, vcpu, (u32)cr, (u32)value, |
2692 | (u32)((u64)value >> 32), handler); | |
2693 | ||
2694 | return value; | |
8776e519 HB |
2695 | } |
2696 | ||
2697 | void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val, | |
2698 | unsigned long *rflags) | |
2699 | { | |
54e445ca JR |
2700 | KVMTRACE_3D(CR_WRITE, vcpu, (u32)cr, (u32)val, |
2701 | (u32)((u64)val >> 32), handler); | |
2702 | ||
8776e519 HB |
2703 | switch (cr) { |
2704 | case 0: | |
2d3ad1f4 | 2705 | kvm_set_cr0(vcpu, mk_cr_64(vcpu->arch.cr0, val)); |
8776e519 HB |
2706 | *rflags = kvm_x86_ops->get_rflags(vcpu); |
2707 | break; | |
2708 | case 2: | |
ad312c7c | 2709 | vcpu->arch.cr2 = val; |
8776e519 HB |
2710 | break; |
2711 | case 3: | |
2d3ad1f4 | 2712 | kvm_set_cr3(vcpu, val); |
8776e519 HB |
2713 | break; |
2714 | case 4: | |
2d3ad1f4 | 2715 | kvm_set_cr4(vcpu, mk_cr_64(vcpu->arch.cr4, val)); |
8776e519 | 2716 | break; |
152ff9be | 2717 | case 8: |
2d3ad1f4 | 2718 | kvm_set_cr8(vcpu, val & 0xfUL); |
152ff9be | 2719 | break; |
8776e519 | 2720 | default: |
b8688d51 | 2721 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr); |
8776e519 HB |
2722 | } |
2723 | } | |
2724 | ||
07716717 DK |
2725 | static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu *vcpu, int i) |
2726 | { | |
ad312c7c ZX |
2727 | struct kvm_cpuid_entry2 *e = &vcpu->arch.cpuid_entries[i]; |
2728 | int j, nent = vcpu->arch.cpuid_nent; | |
07716717 DK |
2729 | |
2730 | e->flags &= ~KVM_CPUID_FLAG_STATE_READ_NEXT; | |
2731 | /* when no next entry is found, the current entry[i] is reselected */ | |
2732 | for (j = i + 1; j == i; j = (j + 1) % nent) { | |
ad312c7c | 2733 | struct kvm_cpuid_entry2 *ej = &vcpu->arch.cpuid_entries[j]; |
07716717 DK |
2734 | if (ej->function == e->function) { |
2735 | ej->flags |= KVM_CPUID_FLAG_STATE_READ_NEXT; | |
2736 | return j; | |
2737 | } | |
2738 | } | |
2739 | return 0; /* silence gcc, even though control never reaches here */ | |
2740 | } | |
2741 | ||
2742 | /* find an entry with matching function, matching index (if needed), and that | |
2743 | * should be read next (if it's stateful) */ | |
2744 | static int is_matching_cpuid_entry(struct kvm_cpuid_entry2 *e, | |
2745 | u32 function, u32 index) | |
2746 | { | |
2747 | if (e->function != function) | |
2748 | return 0; | |
2749 | if ((e->flags & KVM_CPUID_FLAG_SIGNIFCANT_INDEX) && e->index != index) | |
2750 | return 0; | |
2751 | if ((e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) && | |
2752 | !(e->flags & KVM_CPUID_FLAG_STATE_READ_NEXT)) | |
2753 | return 0; | |
2754 | return 1; | |
2755 | } | |
2756 | ||
8776e519 HB |
2757 | void kvm_emulate_cpuid(struct kvm_vcpu *vcpu) |
2758 | { | |
2759 | int i; | |
07716717 DK |
2760 | u32 function, index; |
2761 | struct kvm_cpuid_entry2 *e, *best; | |
8776e519 | 2762 | |
5fdbf976 MT |
2763 | function = kvm_register_read(vcpu, VCPU_REGS_RAX); |
2764 | index = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
2765 | kvm_register_write(vcpu, VCPU_REGS_RAX, 0); | |
2766 | kvm_register_write(vcpu, VCPU_REGS_RBX, 0); | |
2767 | kvm_register_write(vcpu, VCPU_REGS_RCX, 0); | |
2768 | kvm_register_write(vcpu, VCPU_REGS_RDX, 0); | |
8776e519 | 2769 | best = NULL; |
ad312c7c ZX |
2770 | for (i = 0; i < vcpu->arch.cpuid_nent; ++i) { |
2771 | e = &vcpu->arch.cpuid_entries[i]; | |
07716717 DK |
2772 | if (is_matching_cpuid_entry(e, function, index)) { |
2773 | if (e->flags & KVM_CPUID_FLAG_STATEFUL_FUNC) | |
2774 | move_to_next_stateful_cpuid_entry(vcpu, i); | |
8776e519 HB |
2775 | best = e; |
2776 | break; | |
2777 | } | |
2778 | /* | |
2779 | * Both basic or both extended? | |
2780 | */ | |
2781 | if (((e->function ^ function) & 0x80000000) == 0) | |
2782 | if (!best || e->function > best->function) | |
2783 | best = e; | |
2784 | } | |
2785 | if (best) { | |
5fdbf976 MT |
2786 | kvm_register_write(vcpu, VCPU_REGS_RAX, best->eax); |
2787 | kvm_register_write(vcpu, VCPU_REGS_RBX, best->ebx); | |
2788 | kvm_register_write(vcpu, VCPU_REGS_RCX, best->ecx); | |
2789 | kvm_register_write(vcpu, VCPU_REGS_RDX, best->edx); | |
8776e519 | 2790 | } |
8776e519 | 2791 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
2714d1d3 | 2792 | KVMTRACE_5D(CPUID, vcpu, function, |
5fdbf976 MT |
2793 | (u32)kvm_register_read(vcpu, VCPU_REGS_RAX), |
2794 | (u32)kvm_register_read(vcpu, VCPU_REGS_RBX), | |
2795 | (u32)kvm_register_read(vcpu, VCPU_REGS_RCX), | |
2796 | (u32)kvm_register_read(vcpu, VCPU_REGS_RDX), handler); | |
8776e519 HB |
2797 | } |
2798 | EXPORT_SYMBOL_GPL(kvm_emulate_cpuid); | |
d0752060 | 2799 | |
b6c7a5dc HB |
2800 | /* |
2801 | * Check if userspace requested an interrupt window, and that the | |
2802 | * interrupt window is open. | |
2803 | * | |
2804 | * No need to exit to userspace if we already have an interrupt queued. | |
2805 | */ | |
2806 | static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu, | |
2807 | struct kvm_run *kvm_run) | |
2808 | { | |
ad312c7c | 2809 | return (!vcpu->arch.irq_summary && |
b6c7a5dc | 2810 | kvm_run->request_interrupt_window && |
ad312c7c | 2811 | vcpu->arch.interrupt_window_open && |
b6c7a5dc HB |
2812 | (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF)); |
2813 | } | |
2814 | ||
2815 | static void post_kvm_run_save(struct kvm_vcpu *vcpu, | |
2816 | struct kvm_run *kvm_run) | |
2817 | { | |
2818 | kvm_run->if_flag = (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF) != 0; | |
2d3ad1f4 | 2819 | kvm_run->cr8 = kvm_get_cr8(vcpu); |
b6c7a5dc HB |
2820 | kvm_run->apic_base = kvm_get_apic_base(vcpu); |
2821 | if (irqchip_in_kernel(vcpu->kvm)) | |
2822 | kvm_run->ready_for_interrupt_injection = 1; | |
2823 | else | |
2824 | kvm_run->ready_for_interrupt_injection = | |
ad312c7c ZX |
2825 | (vcpu->arch.interrupt_window_open && |
2826 | vcpu->arch.irq_summary == 0); | |
b6c7a5dc HB |
2827 | } |
2828 | ||
b93463aa AK |
2829 | static void vapic_enter(struct kvm_vcpu *vcpu) |
2830 | { | |
2831 | struct kvm_lapic *apic = vcpu->arch.apic; | |
2832 | struct page *page; | |
2833 | ||
2834 | if (!apic || !apic->vapic_addr) | |
2835 | return; | |
2836 | ||
2837 | page = gfn_to_page(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); | |
72dc67a6 IE |
2838 | |
2839 | vcpu->arch.apic->vapic_page = page; | |
b93463aa AK |
2840 | } |
2841 | ||
2842 | static void vapic_exit(struct kvm_vcpu *vcpu) | |
2843 | { | |
2844 | struct kvm_lapic *apic = vcpu->arch.apic; | |
2845 | ||
2846 | if (!apic || !apic->vapic_addr) | |
2847 | return; | |
2848 | ||
f8b78fa3 | 2849 | down_read(&vcpu->kvm->slots_lock); |
b93463aa AK |
2850 | kvm_release_page_dirty(apic->vapic_page); |
2851 | mark_page_dirty(vcpu->kvm, apic->vapic_addr >> PAGE_SHIFT); | |
f8b78fa3 | 2852 | up_read(&vcpu->kvm->slots_lock); |
b93463aa AK |
2853 | } |
2854 | ||
d7690175 | 2855 | static int vcpu_enter_guest(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
b6c7a5dc HB |
2856 | { |
2857 | int r; | |
2858 | ||
2e53d63a MT |
2859 | if (vcpu->requests) |
2860 | if (test_and_clear_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests)) | |
2861 | kvm_mmu_unload(vcpu); | |
2862 | ||
b6c7a5dc HB |
2863 | r = kvm_mmu_reload(vcpu); |
2864 | if (unlikely(r)) | |
2865 | goto out; | |
2866 | ||
2f52d58c AK |
2867 | if (vcpu->requests) { |
2868 | if (test_and_clear_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests)) | |
2f599714 | 2869 | __kvm_migrate_timers(vcpu); |
4731d4c7 MT |
2870 | if (test_and_clear_bit(KVM_REQ_MMU_SYNC, &vcpu->requests)) |
2871 | kvm_mmu_sync_roots(vcpu); | |
d4acf7e7 MT |
2872 | if (test_and_clear_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests)) |
2873 | kvm_x86_ops->tlb_flush(vcpu); | |
b93463aa AK |
2874 | if (test_and_clear_bit(KVM_REQ_REPORT_TPR_ACCESS, |
2875 | &vcpu->requests)) { | |
2876 | kvm_run->exit_reason = KVM_EXIT_TPR_ACCESS; | |
2877 | r = 0; | |
2878 | goto out; | |
2879 | } | |
71c4dfaf JR |
2880 | if (test_and_clear_bit(KVM_REQ_TRIPLE_FAULT, &vcpu->requests)) { |
2881 | kvm_run->exit_reason = KVM_EXIT_SHUTDOWN; | |
2882 | r = 0; | |
2883 | goto out; | |
2884 | } | |
2f52d58c | 2885 | } |
b93463aa | 2886 | |
06e05645 | 2887 | clear_bit(KVM_REQ_PENDING_TIMER, &vcpu->requests); |
b6c7a5dc HB |
2888 | kvm_inject_pending_timer_irqs(vcpu); |
2889 | ||
2890 | preempt_disable(); | |
2891 | ||
2892 | kvm_x86_ops->prepare_guest_switch(vcpu); | |
2893 | kvm_load_guest_fpu(vcpu); | |
2894 | ||
2895 | local_irq_disable(); | |
2896 | ||
d7690175 | 2897 | if (vcpu->requests || need_resched() || signal_pending(current)) { |
6c142801 AK |
2898 | local_irq_enable(); |
2899 | preempt_enable(); | |
2900 | r = 1; | |
2901 | goto out; | |
2902 | } | |
2903 | ||
29415c37 MT |
2904 | if (vcpu->guest_debug.enabled) |
2905 | kvm_x86_ops->guest_debug_pre(vcpu); | |
b6c7a5dc | 2906 | |
e9571ed5 MT |
2907 | vcpu->guest_mode = 1; |
2908 | /* | |
2909 | * Make sure that guest_mode assignment won't happen after | |
2910 | * testing the pending IRQ vector bitmap. | |
2911 | */ | |
2912 | smp_wmb(); | |
2913 | ||
ad312c7c | 2914 | if (vcpu->arch.exception.pending) |
298101da AK |
2915 | __queue_exception(vcpu); |
2916 | else if (irqchip_in_kernel(vcpu->kvm)) | |
b6c7a5dc | 2917 | kvm_x86_ops->inject_pending_irq(vcpu); |
eb9774f0 | 2918 | else |
b6c7a5dc HB |
2919 | kvm_x86_ops->inject_pending_vectors(vcpu, kvm_run); |
2920 | ||
b93463aa AK |
2921 | kvm_lapic_sync_to_vapic(vcpu); |
2922 | ||
3200f405 MT |
2923 | up_read(&vcpu->kvm->slots_lock); |
2924 | ||
b6c7a5dc HB |
2925 | kvm_guest_enter(); |
2926 | ||
b6c7a5dc | 2927 | |
2714d1d3 | 2928 | KVMTRACE_0D(VMENTRY, vcpu, entryexit); |
b6c7a5dc HB |
2929 | kvm_x86_ops->run(vcpu, kvm_run); |
2930 | ||
2931 | vcpu->guest_mode = 0; | |
2932 | local_irq_enable(); | |
2933 | ||
2934 | ++vcpu->stat.exits; | |
2935 | ||
2936 | /* | |
2937 | * We must have an instruction between local_irq_enable() and | |
2938 | * kvm_guest_exit(), so the timer interrupt isn't delayed by | |
2939 | * the interrupt shadow. The stat.exits increment will do nicely. | |
2940 | * But we need to prevent reordering, hence this barrier(): | |
2941 | */ | |
2942 | barrier(); | |
2943 | ||
2944 | kvm_guest_exit(); | |
2945 | ||
2946 | preempt_enable(); | |
2947 | ||
3200f405 MT |
2948 | down_read(&vcpu->kvm->slots_lock); |
2949 | ||
b6c7a5dc HB |
2950 | /* |
2951 | * Profile KVM exit RIPs: | |
2952 | */ | |
2953 | if (unlikely(prof_on == KVM_PROFILING)) { | |
5fdbf976 MT |
2954 | unsigned long rip = kvm_rip_read(vcpu); |
2955 | profile_hit(KVM_PROFILING, (void *)rip); | |
b6c7a5dc HB |
2956 | } |
2957 | ||
ad312c7c ZX |
2958 | if (vcpu->arch.exception.pending && kvm_x86_ops->exception_injected(vcpu)) |
2959 | vcpu->arch.exception.pending = false; | |
298101da | 2960 | |
b93463aa AK |
2961 | kvm_lapic_sync_from_vapic(vcpu); |
2962 | ||
b6c7a5dc | 2963 | r = kvm_x86_ops->handle_exit(kvm_run, vcpu); |
d7690175 MT |
2964 | out: |
2965 | return r; | |
2966 | } | |
b6c7a5dc | 2967 | |
d7690175 MT |
2968 | static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
2969 | { | |
2970 | int r; | |
2971 | ||
2972 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED)) { | |
1b10bf31 JK |
2973 | pr_debug("vcpu %d received sipi with vector # %x\n", |
2974 | vcpu->vcpu_id, vcpu->arch.sipi_vector); | |
d7690175 MT |
2975 | kvm_lapic_reset(vcpu); |
2976 | r = kvm_x86_ops->vcpu_reset(vcpu); | |
2977 | if (r) | |
2978 | return r; | |
2979 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; | |
b6c7a5dc HB |
2980 | } |
2981 | ||
d7690175 MT |
2982 | down_read(&vcpu->kvm->slots_lock); |
2983 | vapic_enter(vcpu); | |
2984 | ||
2985 | r = 1; | |
2986 | while (r > 0) { | |
af2152f5 | 2987 | if (vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE) |
d7690175 MT |
2988 | r = vcpu_enter_guest(vcpu, kvm_run); |
2989 | else { | |
2990 | up_read(&vcpu->kvm->slots_lock); | |
2991 | kvm_vcpu_block(vcpu); | |
2992 | down_read(&vcpu->kvm->slots_lock); | |
2993 | if (test_and_clear_bit(KVM_REQ_UNHALT, &vcpu->requests)) | |
2994 | if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED) | |
2995 | vcpu->arch.mp_state = | |
2996 | KVM_MP_STATE_RUNNABLE; | |
2997 | if (vcpu->arch.mp_state != KVM_MP_STATE_RUNNABLE) | |
2998 | r = -EINTR; | |
2999 | } | |
3000 | ||
3001 | if (r > 0) { | |
3002 | if (dm_request_for_irq_injection(vcpu, kvm_run)) { | |
3003 | r = -EINTR; | |
3004 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
3005 | ++vcpu->stat.request_irq_exits; | |
3006 | } | |
3007 | if (signal_pending(current)) { | |
3008 | r = -EINTR; | |
3009 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
3010 | ++vcpu->stat.signal_exits; | |
3011 | } | |
3012 | if (need_resched()) { | |
3013 | up_read(&vcpu->kvm->slots_lock); | |
3014 | kvm_resched(vcpu); | |
3015 | down_read(&vcpu->kvm->slots_lock); | |
3016 | } | |
3017 | } | |
b6c7a5dc HB |
3018 | } |
3019 | ||
d7690175 | 3020 | up_read(&vcpu->kvm->slots_lock); |
b6c7a5dc HB |
3021 | post_kvm_run_save(vcpu, kvm_run); |
3022 | ||
b93463aa AK |
3023 | vapic_exit(vcpu); |
3024 | ||
b6c7a5dc HB |
3025 | return r; |
3026 | } | |
3027 | ||
3028 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
3029 | { | |
3030 | int r; | |
3031 | sigset_t sigsaved; | |
3032 | ||
3033 | vcpu_load(vcpu); | |
3034 | ||
ac9f6dc0 AK |
3035 | if (vcpu->sigset_active) |
3036 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
3037 | ||
a4535290 | 3038 | if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) { |
b6c7a5dc | 3039 | kvm_vcpu_block(vcpu); |
d7690175 | 3040 | clear_bit(KVM_REQ_UNHALT, &vcpu->requests); |
ac9f6dc0 AK |
3041 | r = -EAGAIN; |
3042 | goto out; | |
b6c7a5dc HB |
3043 | } |
3044 | ||
b6c7a5dc HB |
3045 | /* re-sync apic's tpr */ |
3046 | if (!irqchip_in_kernel(vcpu->kvm)) | |
2d3ad1f4 | 3047 | kvm_set_cr8(vcpu, kvm_run->cr8); |
b6c7a5dc | 3048 | |
ad312c7c | 3049 | if (vcpu->arch.pio.cur_count) { |
b6c7a5dc HB |
3050 | r = complete_pio(vcpu); |
3051 | if (r) | |
3052 | goto out; | |
3053 | } | |
3054 | #if CONFIG_HAS_IOMEM | |
3055 | if (vcpu->mmio_needed) { | |
3056 | memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8); | |
3057 | vcpu->mmio_read_completed = 1; | |
3058 | vcpu->mmio_needed = 0; | |
3200f405 MT |
3059 | |
3060 | down_read(&vcpu->kvm->slots_lock); | |
b6c7a5dc | 3061 | r = emulate_instruction(vcpu, kvm_run, |
571008da SY |
3062 | vcpu->arch.mmio_fault_cr2, 0, |
3063 | EMULTYPE_NO_DECODE); | |
3200f405 | 3064 | up_read(&vcpu->kvm->slots_lock); |
b6c7a5dc HB |
3065 | if (r == EMULATE_DO_MMIO) { |
3066 | /* | |
3067 | * Read-modify-write. Back to userspace. | |
3068 | */ | |
3069 | r = 0; | |
3070 | goto out; | |
3071 | } | |
3072 | } | |
3073 | #endif | |
5fdbf976 MT |
3074 | if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) |
3075 | kvm_register_write(vcpu, VCPU_REGS_RAX, | |
3076 | kvm_run->hypercall.ret); | |
b6c7a5dc HB |
3077 | |
3078 | r = __vcpu_run(vcpu, kvm_run); | |
3079 | ||
3080 | out: | |
3081 | if (vcpu->sigset_active) | |
3082 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
3083 | ||
3084 | vcpu_put(vcpu); | |
3085 | return r; | |
3086 | } | |
3087 | ||
3088 | int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
3089 | { | |
3090 | vcpu_load(vcpu); | |
3091 | ||
5fdbf976 MT |
3092 | regs->rax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
3093 | regs->rbx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
3094 | regs->rcx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
3095 | regs->rdx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
3096 | regs->rsi = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
3097 | regs->rdi = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
3098 | regs->rsp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
3099 | regs->rbp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
b6c7a5dc | 3100 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
3101 | regs->r8 = kvm_register_read(vcpu, VCPU_REGS_R8); |
3102 | regs->r9 = kvm_register_read(vcpu, VCPU_REGS_R9); | |
3103 | regs->r10 = kvm_register_read(vcpu, VCPU_REGS_R10); | |
3104 | regs->r11 = kvm_register_read(vcpu, VCPU_REGS_R11); | |
3105 | regs->r12 = kvm_register_read(vcpu, VCPU_REGS_R12); | |
3106 | regs->r13 = kvm_register_read(vcpu, VCPU_REGS_R13); | |
3107 | regs->r14 = kvm_register_read(vcpu, VCPU_REGS_R14); | |
3108 | regs->r15 = kvm_register_read(vcpu, VCPU_REGS_R15); | |
b6c7a5dc HB |
3109 | #endif |
3110 | ||
5fdbf976 | 3111 | regs->rip = kvm_rip_read(vcpu); |
b6c7a5dc HB |
3112 | regs->rflags = kvm_x86_ops->get_rflags(vcpu); |
3113 | ||
3114 | /* | |
3115 | * Don't leak debug flags in case they were set for guest debugging | |
3116 | */ | |
3117 | if (vcpu->guest_debug.enabled && vcpu->guest_debug.singlestep) | |
3118 | regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF); | |
3119 | ||
3120 | vcpu_put(vcpu); | |
3121 | ||
3122 | return 0; | |
3123 | } | |
3124 | ||
3125 | int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs) | |
3126 | { | |
3127 | vcpu_load(vcpu); | |
3128 | ||
5fdbf976 MT |
3129 | kvm_register_write(vcpu, VCPU_REGS_RAX, regs->rax); |
3130 | kvm_register_write(vcpu, VCPU_REGS_RBX, regs->rbx); | |
3131 | kvm_register_write(vcpu, VCPU_REGS_RCX, regs->rcx); | |
3132 | kvm_register_write(vcpu, VCPU_REGS_RDX, regs->rdx); | |
3133 | kvm_register_write(vcpu, VCPU_REGS_RSI, regs->rsi); | |
3134 | kvm_register_write(vcpu, VCPU_REGS_RDI, regs->rdi); | |
3135 | kvm_register_write(vcpu, VCPU_REGS_RSP, regs->rsp); | |
3136 | kvm_register_write(vcpu, VCPU_REGS_RBP, regs->rbp); | |
b6c7a5dc | 3137 | #ifdef CONFIG_X86_64 |
5fdbf976 MT |
3138 | kvm_register_write(vcpu, VCPU_REGS_R8, regs->r8); |
3139 | kvm_register_write(vcpu, VCPU_REGS_R9, regs->r9); | |
3140 | kvm_register_write(vcpu, VCPU_REGS_R10, regs->r10); | |
3141 | kvm_register_write(vcpu, VCPU_REGS_R11, regs->r11); | |
3142 | kvm_register_write(vcpu, VCPU_REGS_R12, regs->r12); | |
3143 | kvm_register_write(vcpu, VCPU_REGS_R13, regs->r13); | |
3144 | kvm_register_write(vcpu, VCPU_REGS_R14, regs->r14); | |
3145 | kvm_register_write(vcpu, VCPU_REGS_R15, regs->r15); | |
3146 | ||
b6c7a5dc HB |
3147 | #endif |
3148 | ||
5fdbf976 | 3149 | kvm_rip_write(vcpu, regs->rip); |
b6c7a5dc HB |
3150 | kvm_x86_ops->set_rflags(vcpu, regs->rflags); |
3151 | ||
b6c7a5dc | 3152 | |
b4f14abd JK |
3153 | vcpu->arch.exception.pending = false; |
3154 | ||
b6c7a5dc HB |
3155 | vcpu_put(vcpu); |
3156 | ||
3157 | return 0; | |
3158 | } | |
3159 | ||
3e6e0aab GT |
3160 | void kvm_get_segment(struct kvm_vcpu *vcpu, |
3161 | struct kvm_segment *var, int seg) | |
b6c7a5dc | 3162 | { |
14af3f3c | 3163 | kvm_x86_ops->get_segment(vcpu, var, seg); |
b6c7a5dc HB |
3164 | } |
3165 | ||
3166 | void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) | |
3167 | { | |
3168 | struct kvm_segment cs; | |
3169 | ||
3e6e0aab | 3170 | kvm_get_segment(vcpu, &cs, VCPU_SREG_CS); |
b6c7a5dc HB |
3171 | *db = cs.db; |
3172 | *l = cs.l; | |
3173 | } | |
3174 | EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits); | |
3175 | ||
3176 | int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, | |
3177 | struct kvm_sregs *sregs) | |
3178 | { | |
3179 | struct descriptor_table dt; | |
3180 | int pending_vec; | |
3181 | ||
3182 | vcpu_load(vcpu); | |
3183 | ||
3e6e0aab GT |
3184 | kvm_get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
3185 | kvm_get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
3186 | kvm_get_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
3187 | kvm_get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
3188 | kvm_get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
3189 | kvm_get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 3190 | |
3e6e0aab GT |
3191 | kvm_get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
3192 | kvm_get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc HB |
3193 | |
3194 | kvm_x86_ops->get_idt(vcpu, &dt); | |
3195 | sregs->idt.limit = dt.limit; | |
3196 | sregs->idt.base = dt.base; | |
3197 | kvm_x86_ops->get_gdt(vcpu, &dt); | |
3198 | sregs->gdt.limit = dt.limit; | |
3199 | sregs->gdt.base = dt.base; | |
3200 | ||
3201 | kvm_x86_ops->decache_cr4_guest_bits(vcpu); | |
ad312c7c ZX |
3202 | sregs->cr0 = vcpu->arch.cr0; |
3203 | sregs->cr2 = vcpu->arch.cr2; | |
3204 | sregs->cr3 = vcpu->arch.cr3; | |
3205 | sregs->cr4 = vcpu->arch.cr4; | |
2d3ad1f4 | 3206 | sregs->cr8 = kvm_get_cr8(vcpu); |
ad312c7c | 3207 | sregs->efer = vcpu->arch.shadow_efer; |
b6c7a5dc HB |
3208 | sregs->apic_base = kvm_get_apic_base(vcpu); |
3209 | ||
3210 | if (irqchip_in_kernel(vcpu->kvm)) { | |
3211 | memset(sregs->interrupt_bitmap, 0, | |
3212 | sizeof sregs->interrupt_bitmap); | |
3213 | pending_vec = kvm_x86_ops->get_irq(vcpu); | |
3214 | if (pending_vec >= 0) | |
3215 | set_bit(pending_vec, | |
3216 | (unsigned long *)sregs->interrupt_bitmap); | |
3217 | } else | |
ad312c7c | 3218 | memcpy(sregs->interrupt_bitmap, vcpu->arch.irq_pending, |
b6c7a5dc HB |
3219 | sizeof sregs->interrupt_bitmap); |
3220 | ||
3221 | vcpu_put(vcpu); | |
3222 | ||
3223 | return 0; | |
3224 | } | |
3225 | ||
62d9f0db MT |
3226 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
3227 | struct kvm_mp_state *mp_state) | |
3228 | { | |
3229 | vcpu_load(vcpu); | |
3230 | mp_state->mp_state = vcpu->arch.mp_state; | |
3231 | vcpu_put(vcpu); | |
3232 | return 0; | |
3233 | } | |
3234 | ||
3235 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, | |
3236 | struct kvm_mp_state *mp_state) | |
3237 | { | |
3238 | vcpu_load(vcpu); | |
3239 | vcpu->arch.mp_state = mp_state->mp_state; | |
3240 | vcpu_put(vcpu); | |
3241 | return 0; | |
3242 | } | |
3243 | ||
3e6e0aab | 3244 | static void kvm_set_segment(struct kvm_vcpu *vcpu, |
b6c7a5dc HB |
3245 | struct kvm_segment *var, int seg) |
3246 | { | |
14af3f3c | 3247 | kvm_x86_ops->set_segment(vcpu, var, seg); |
b6c7a5dc HB |
3248 | } |
3249 | ||
37817f29 IE |
3250 | static void seg_desct_to_kvm_desct(struct desc_struct *seg_desc, u16 selector, |
3251 | struct kvm_segment *kvm_desct) | |
3252 | { | |
3253 | kvm_desct->base = seg_desc->base0; | |
3254 | kvm_desct->base |= seg_desc->base1 << 16; | |
3255 | kvm_desct->base |= seg_desc->base2 << 24; | |
3256 | kvm_desct->limit = seg_desc->limit0; | |
3257 | kvm_desct->limit |= seg_desc->limit << 16; | |
c93cd3a5 MT |
3258 | if (seg_desc->g) { |
3259 | kvm_desct->limit <<= 12; | |
3260 | kvm_desct->limit |= 0xfff; | |
3261 | } | |
37817f29 IE |
3262 | kvm_desct->selector = selector; |
3263 | kvm_desct->type = seg_desc->type; | |
3264 | kvm_desct->present = seg_desc->p; | |
3265 | kvm_desct->dpl = seg_desc->dpl; | |
3266 | kvm_desct->db = seg_desc->d; | |
3267 | kvm_desct->s = seg_desc->s; | |
3268 | kvm_desct->l = seg_desc->l; | |
3269 | kvm_desct->g = seg_desc->g; | |
3270 | kvm_desct->avl = seg_desc->avl; | |
3271 | if (!selector) | |
3272 | kvm_desct->unusable = 1; | |
3273 | else | |
3274 | kvm_desct->unusable = 0; | |
3275 | kvm_desct->padding = 0; | |
3276 | } | |
3277 | ||
3278 | static void get_segment_descritptor_dtable(struct kvm_vcpu *vcpu, | |
3279 | u16 selector, | |
3280 | struct descriptor_table *dtable) | |
3281 | { | |
3282 | if (selector & 1 << 2) { | |
3283 | struct kvm_segment kvm_seg; | |
3284 | ||
3e6e0aab | 3285 | kvm_get_segment(vcpu, &kvm_seg, VCPU_SREG_LDTR); |
37817f29 IE |
3286 | |
3287 | if (kvm_seg.unusable) | |
3288 | dtable->limit = 0; | |
3289 | else | |
3290 | dtable->limit = kvm_seg.limit; | |
3291 | dtable->base = kvm_seg.base; | |
3292 | } | |
3293 | else | |
3294 | kvm_x86_ops->get_gdt(vcpu, dtable); | |
3295 | } | |
3296 | ||
3297 | /* allowed just for 8 bytes segments */ | |
3298 | static int load_guest_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, | |
3299 | struct desc_struct *seg_desc) | |
3300 | { | |
98899aa0 | 3301 | gpa_t gpa; |
37817f29 IE |
3302 | struct descriptor_table dtable; |
3303 | u16 index = selector >> 3; | |
3304 | ||
3305 | get_segment_descritptor_dtable(vcpu, selector, &dtable); | |
3306 | ||
3307 | if (dtable.limit < index * 8 + 7) { | |
3308 | kvm_queue_exception_e(vcpu, GP_VECTOR, selector & 0xfffc); | |
3309 | return 1; | |
3310 | } | |
98899aa0 MT |
3311 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, dtable.base); |
3312 | gpa += index * 8; | |
3313 | return kvm_read_guest(vcpu->kvm, gpa, seg_desc, 8); | |
37817f29 IE |
3314 | } |
3315 | ||
3316 | /* allowed just for 8 bytes segments */ | |
3317 | static int save_guest_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, | |
3318 | struct desc_struct *seg_desc) | |
3319 | { | |
98899aa0 | 3320 | gpa_t gpa; |
37817f29 IE |
3321 | struct descriptor_table dtable; |
3322 | u16 index = selector >> 3; | |
3323 | ||
3324 | get_segment_descritptor_dtable(vcpu, selector, &dtable); | |
3325 | ||
3326 | if (dtable.limit < index * 8 + 7) | |
3327 | return 1; | |
98899aa0 MT |
3328 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, dtable.base); |
3329 | gpa += index * 8; | |
3330 | return kvm_write_guest(vcpu->kvm, gpa, seg_desc, 8); | |
37817f29 IE |
3331 | } |
3332 | ||
3333 | static u32 get_tss_base_addr(struct kvm_vcpu *vcpu, | |
3334 | struct desc_struct *seg_desc) | |
3335 | { | |
3336 | u32 base_addr; | |
3337 | ||
3338 | base_addr = seg_desc->base0; | |
3339 | base_addr |= (seg_desc->base1 << 16); | |
3340 | base_addr |= (seg_desc->base2 << 24); | |
3341 | ||
98899aa0 | 3342 | return vcpu->arch.mmu.gva_to_gpa(vcpu, base_addr); |
37817f29 IE |
3343 | } |
3344 | ||
37817f29 IE |
3345 | static u16 get_segment_selector(struct kvm_vcpu *vcpu, int seg) |
3346 | { | |
3347 | struct kvm_segment kvm_seg; | |
3348 | ||
3e6e0aab | 3349 | kvm_get_segment(vcpu, &kvm_seg, seg); |
37817f29 IE |
3350 | return kvm_seg.selector; |
3351 | } | |
3352 | ||
3353 | static int load_segment_descriptor_to_kvm_desct(struct kvm_vcpu *vcpu, | |
3354 | u16 selector, | |
3355 | struct kvm_segment *kvm_seg) | |
3356 | { | |
3357 | struct desc_struct seg_desc; | |
3358 | ||
3359 | if (load_guest_segment_descriptor(vcpu, selector, &seg_desc)) | |
3360 | return 1; | |
3361 | seg_desct_to_kvm_desct(&seg_desc, selector, kvm_seg); | |
3362 | return 0; | |
3363 | } | |
3364 | ||
2259e3a7 | 3365 | static int kvm_load_realmode_segment(struct kvm_vcpu *vcpu, u16 selector, int seg) |
f4bbd9aa AK |
3366 | { |
3367 | struct kvm_segment segvar = { | |
3368 | .base = selector << 4, | |
3369 | .limit = 0xffff, | |
3370 | .selector = selector, | |
3371 | .type = 3, | |
3372 | .present = 1, | |
3373 | .dpl = 3, | |
3374 | .db = 0, | |
3375 | .s = 1, | |
3376 | .l = 0, | |
3377 | .g = 0, | |
3378 | .avl = 0, | |
3379 | .unusable = 0, | |
3380 | }; | |
3381 | kvm_x86_ops->set_segment(vcpu, &segvar, seg); | |
3382 | return 0; | |
3383 | } | |
3384 | ||
3e6e0aab GT |
3385 | int kvm_load_segment_descriptor(struct kvm_vcpu *vcpu, u16 selector, |
3386 | int type_bits, int seg) | |
37817f29 IE |
3387 | { |
3388 | struct kvm_segment kvm_seg; | |
3389 | ||
f4bbd9aa AK |
3390 | if (!(vcpu->arch.cr0 & X86_CR0_PE)) |
3391 | return kvm_load_realmode_segment(vcpu, selector, seg); | |
37817f29 IE |
3392 | if (load_segment_descriptor_to_kvm_desct(vcpu, selector, &kvm_seg)) |
3393 | return 1; | |
3394 | kvm_seg.type |= type_bits; | |
3395 | ||
3396 | if (seg != VCPU_SREG_SS && seg != VCPU_SREG_CS && | |
3397 | seg != VCPU_SREG_LDTR) | |
3398 | if (!kvm_seg.s) | |
3399 | kvm_seg.unusable = 1; | |
3400 | ||
3e6e0aab | 3401 | kvm_set_segment(vcpu, &kvm_seg, seg); |
37817f29 IE |
3402 | return 0; |
3403 | } | |
3404 | ||
3405 | static void save_state_to_tss32(struct kvm_vcpu *vcpu, | |
3406 | struct tss_segment_32 *tss) | |
3407 | { | |
3408 | tss->cr3 = vcpu->arch.cr3; | |
5fdbf976 | 3409 | tss->eip = kvm_rip_read(vcpu); |
37817f29 | 3410 | tss->eflags = kvm_x86_ops->get_rflags(vcpu); |
5fdbf976 MT |
3411 | tss->eax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
3412 | tss->ecx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
3413 | tss->edx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
3414 | tss->ebx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
3415 | tss->esp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
3416 | tss->ebp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
3417 | tss->esi = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
3418 | tss->edi = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
37817f29 IE |
3419 | tss->es = get_segment_selector(vcpu, VCPU_SREG_ES); |
3420 | tss->cs = get_segment_selector(vcpu, VCPU_SREG_CS); | |
3421 | tss->ss = get_segment_selector(vcpu, VCPU_SREG_SS); | |
3422 | tss->ds = get_segment_selector(vcpu, VCPU_SREG_DS); | |
3423 | tss->fs = get_segment_selector(vcpu, VCPU_SREG_FS); | |
3424 | tss->gs = get_segment_selector(vcpu, VCPU_SREG_GS); | |
3425 | tss->ldt_selector = get_segment_selector(vcpu, VCPU_SREG_LDTR); | |
3426 | tss->prev_task_link = get_segment_selector(vcpu, VCPU_SREG_TR); | |
3427 | } | |
3428 | ||
3429 | static int load_state_from_tss32(struct kvm_vcpu *vcpu, | |
3430 | struct tss_segment_32 *tss) | |
3431 | { | |
3432 | kvm_set_cr3(vcpu, tss->cr3); | |
3433 | ||
5fdbf976 | 3434 | kvm_rip_write(vcpu, tss->eip); |
37817f29 IE |
3435 | kvm_x86_ops->set_rflags(vcpu, tss->eflags | 2); |
3436 | ||
5fdbf976 MT |
3437 | kvm_register_write(vcpu, VCPU_REGS_RAX, tss->eax); |
3438 | kvm_register_write(vcpu, VCPU_REGS_RCX, tss->ecx); | |
3439 | kvm_register_write(vcpu, VCPU_REGS_RDX, tss->edx); | |
3440 | kvm_register_write(vcpu, VCPU_REGS_RBX, tss->ebx); | |
3441 | kvm_register_write(vcpu, VCPU_REGS_RSP, tss->esp); | |
3442 | kvm_register_write(vcpu, VCPU_REGS_RBP, tss->ebp); | |
3443 | kvm_register_write(vcpu, VCPU_REGS_RSI, tss->esi); | |
3444 | kvm_register_write(vcpu, VCPU_REGS_RDI, tss->edi); | |
37817f29 | 3445 | |
3e6e0aab | 3446 | if (kvm_load_segment_descriptor(vcpu, tss->ldt_selector, 0, VCPU_SREG_LDTR)) |
37817f29 IE |
3447 | return 1; |
3448 | ||
3e6e0aab | 3449 | if (kvm_load_segment_descriptor(vcpu, tss->es, 1, VCPU_SREG_ES)) |
37817f29 IE |
3450 | return 1; |
3451 | ||
3e6e0aab | 3452 | if (kvm_load_segment_descriptor(vcpu, tss->cs, 9, VCPU_SREG_CS)) |
37817f29 IE |
3453 | return 1; |
3454 | ||
3e6e0aab | 3455 | if (kvm_load_segment_descriptor(vcpu, tss->ss, 1, VCPU_SREG_SS)) |
37817f29 IE |
3456 | return 1; |
3457 | ||
3e6e0aab | 3458 | if (kvm_load_segment_descriptor(vcpu, tss->ds, 1, VCPU_SREG_DS)) |
37817f29 IE |
3459 | return 1; |
3460 | ||
3e6e0aab | 3461 | if (kvm_load_segment_descriptor(vcpu, tss->fs, 1, VCPU_SREG_FS)) |
37817f29 IE |
3462 | return 1; |
3463 | ||
3e6e0aab | 3464 | if (kvm_load_segment_descriptor(vcpu, tss->gs, 1, VCPU_SREG_GS)) |
37817f29 IE |
3465 | return 1; |
3466 | return 0; | |
3467 | } | |
3468 | ||
3469 | static void save_state_to_tss16(struct kvm_vcpu *vcpu, | |
3470 | struct tss_segment_16 *tss) | |
3471 | { | |
5fdbf976 | 3472 | tss->ip = kvm_rip_read(vcpu); |
37817f29 | 3473 | tss->flag = kvm_x86_ops->get_rflags(vcpu); |
5fdbf976 MT |
3474 | tss->ax = kvm_register_read(vcpu, VCPU_REGS_RAX); |
3475 | tss->cx = kvm_register_read(vcpu, VCPU_REGS_RCX); | |
3476 | tss->dx = kvm_register_read(vcpu, VCPU_REGS_RDX); | |
3477 | tss->bx = kvm_register_read(vcpu, VCPU_REGS_RBX); | |
3478 | tss->sp = kvm_register_read(vcpu, VCPU_REGS_RSP); | |
3479 | tss->bp = kvm_register_read(vcpu, VCPU_REGS_RBP); | |
3480 | tss->si = kvm_register_read(vcpu, VCPU_REGS_RSI); | |
3481 | tss->di = kvm_register_read(vcpu, VCPU_REGS_RDI); | |
37817f29 IE |
3482 | |
3483 | tss->es = get_segment_selector(vcpu, VCPU_SREG_ES); | |
3484 | tss->cs = get_segment_selector(vcpu, VCPU_SREG_CS); | |
3485 | tss->ss = get_segment_selector(vcpu, VCPU_SREG_SS); | |
3486 | tss->ds = get_segment_selector(vcpu, VCPU_SREG_DS); | |
3487 | tss->ldt = get_segment_selector(vcpu, VCPU_SREG_LDTR); | |
3488 | tss->prev_task_link = get_segment_selector(vcpu, VCPU_SREG_TR); | |
3489 | } | |
3490 | ||
3491 | static int load_state_from_tss16(struct kvm_vcpu *vcpu, | |
3492 | struct tss_segment_16 *tss) | |
3493 | { | |
5fdbf976 | 3494 | kvm_rip_write(vcpu, tss->ip); |
37817f29 | 3495 | kvm_x86_ops->set_rflags(vcpu, tss->flag | 2); |
5fdbf976 MT |
3496 | kvm_register_write(vcpu, VCPU_REGS_RAX, tss->ax); |
3497 | kvm_register_write(vcpu, VCPU_REGS_RCX, tss->cx); | |
3498 | kvm_register_write(vcpu, VCPU_REGS_RDX, tss->dx); | |
3499 | kvm_register_write(vcpu, VCPU_REGS_RBX, tss->bx); | |
3500 | kvm_register_write(vcpu, VCPU_REGS_RSP, tss->sp); | |
3501 | kvm_register_write(vcpu, VCPU_REGS_RBP, tss->bp); | |
3502 | kvm_register_write(vcpu, VCPU_REGS_RSI, tss->si); | |
3503 | kvm_register_write(vcpu, VCPU_REGS_RDI, tss->di); | |
37817f29 | 3504 | |
3e6e0aab | 3505 | if (kvm_load_segment_descriptor(vcpu, tss->ldt, 0, VCPU_SREG_LDTR)) |
37817f29 IE |
3506 | return 1; |
3507 | ||
3e6e0aab | 3508 | if (kvm_load_segment_descriptor(vcpu, tss->es, 1, VCPU_SREG_ES)) |
37817f29 IE |
3509 | return 1; |
3510 | ||
3e6e0aab | 3511 | if (kvm_load_segment_descriptor(vcpu, tss->cs, 9, VCPU_SREG_CS)) |
37817f29 IE |
3512 | return 1; |
3513 | ||
3e6e0aab | 3514 | if (kvm_load_segment_descriptor(vcpu, tss->ss, 1, VCPU_SREG_SS)) |
37817f29 IE |
3515 | return 1; |
3516 | ||
3e6e0aab | 3517 | if (kvm_load_segment_descriptor(vcpu, tss->ds, 1, VCPU_SREG_DS)) |
37817f29 IE |
3518 | return 1; |
3519 | return 0; | |
3520 | } | |
3521 | ||
8b2cf73c | 3522 | static int kvm_task_switch_16(struct kvm_vcpu *vcpu, u16 tss_selector, |
34198bf8 | 3523 | u32 old_tss_base, |
37817f29 IE |
3524 | struct desc_struct *nseg_desc) |
3525 | { | |
3526 | struct tss_segment_16 tss_segment_16; | |
3527 | int ret = 0; | |
3528 | ||
34198bf8 MT |
3529 | if (kvm_read_guest(vcpu->kvm, old_tss_base, &tss_segment_16, |
3530 | sizeof tss_segment_16)) | |
37817f29 IE |
3531 | goto out; |
3532 | ||
3533 | save_state_to_tss16(vcpu, &tss_segment_16); | |
37817f29 | 3534 | |
34198bf8 MT |
3535 | if (kvm_write_guest(vcpu->kvm, old_tss_base, &tss_segment_16, |
3536 | sizeof tss_segment_16)) | |
37817f29 | 3537 | goto out; |
34198bf8 MT |
3538 | |
3539 | if (kvm_read_guest(vcpu->kvm, get_tss_base_addr(vcpu, nseg_desc), | |
3540 | &tss_segment_16, sizeof tss_segment_16)) | |
3541 | goto out; | |
3542 | ||
37817f29 IE |
3543 | if (load_state_from_tss16(vcpu, &tss_segment_16)) |
3544 | goto out; | |
3545 | ||
3546 | ret = 1; | |
3547 | out: | |
3548 | return ret; | |
3549 | } | |
3550 | ||
8b2cf73c | 3551 | static int kvm_task_switch_32(struct kvm_vcpu *vcpu, u16 tss_selector, |
34198bf8 | 3552 | u32 old_tss_base, |
37817f29 IE |
3553 | struct desc_struct *nseg_desc) |
3554 | { | |
3555 | struct tss_segment_32 tss_segment_32; | |
3556 | int ret = 0; | |
3557 | ||
34198bf8 MT |
3558 | if (kvm_read_guest(vcpu->kvm, old_tss_base, &tss_segment_32, |
3559 | sizeof tss_segment_32)) | |
37817f29 IE |
3560 | goto out; |
3561 | ||
3562 | save_state_to_tss32(vcpu, &tss_segment_32); | |
37817f29 | 3563 | |
34198bf8 MT |
3564 | if (kvm_write_guest(vcpu->kvm, old_tss_base, &tss_segment_32, |
3565 | sizeof tss_segment_32)) | |
3566 | goto out; | |
3567 | ||
3568 | if (kvm_read_guest(vcpu->kvm, get_tss_base_addr(vcpu, nseg_desc), | |
3569 | &tss_segment_32, sizeof tss_segment_32)) | |
37817f29 | 3570 | goto out; |
34198bf8 | 3571 | |
37817f29 IE |
3572 | if (load_state_from_tss32(vcpu, &tss_segment_32)) |
3573 | goto out; | |
3574 | ||
3575 | ret = 1; | |
3576 | out: | |
3577 | return ret; | |
3578 | } | |
3579 | ||
3580 | int kvm_task_switch(struct kvm_vcpu *vcpu, u16 tss_selector, int reason) | |
3581 | { | |
3582 | struct kvm_segment tr_seg; | |
3583 | struct desc_struct cseg_desc; | |
3584 | struct desc_struct nseg_desc; | |
3585 | int ret = 0; | |
34198bf8 MT |
3586 | u32 old_tss_base = get_segment_base(vcpu, VCPU_SREG_TR); |
3587 | u16 old_tss_sel = get_segment_selector(vcpu, VCPU_SREG_TR); | |
37817f29 | 3588 | |
34198bf8 | 3589 | old_tss_base = vcpu->arch.mmu.gva_to_gpa(vcpu, old_tss_base); |
37817f29 | 3590 | |
34198bf8 MT |
3591 | /* FIXME: Handle errors. Failure to read either TSS or their |
3592 | * descriptors should generate a pagefault. | |
3593 | */ | |
37817f29 IE |
3594 | if (load_guest_segment_descriptor(vcpu, tss_selector, &nseg_desc)) |
3595 | goto out; | |
3596 | ||
34198bf8 | 3597 | if (load_guest_segment_descriptor(vcpu, old_tss_sel, &cseg_desc)) |
37817f29 IE |
3598 | goto out; |
3599 | ||
37817f29 IE |
3600 | if (reason != TASK_SWITCH_IRET) { |
3601 | int cpl; | |
3602 | ||
3603 | cpl = kvm_x86_ops->get_cpl(vcpu); | |
3604 | if ((tss_selector & 3) > nseg_desc.dpl || cpl > nseg_desc.dpl) { | |
3605 | kvm_queue_exception_e(vcpu, GP_VECTOR, 0); | |
3606 | return 1; | |
3607 | } | |
3608 | } | |
3609 | ||
3610 | if (!nseg_desc.p || (nseg_desc.limit0 | nseg_desc.limit << 16) < 0x67) { | |
3611 | kvm_queue_exception_e(vcpu, TS_VECTOR, tss_selector & 0xfffc); | |
3612 | return 1; | |
3613 | } | |
3614 | ||
3615 | if (reason == TASK_SWITCH_IRET || reason == TASK_SWITCH_JMP) { | |
3fe913e7 | 3616 | cseg_desc.type &= ~(1 << 1); //clear the B flag |
34198bf8 | 3617 | save_guest_segment_descriptor(vcpu, old_tss_sel, &cseg_desc); |
37817f29 IE |
3618 | } |
3619 | ||
3620 | if (reason == TASK_SWITCH_IRET) { | |
3621 | u32 eflags = kvm_x86_ops->get_rflags(vcpu); | |
3622 | kvm_x86_ops->set_rflags(vcpu, eflags & ~X86_EFLAGS_NT); | |
3623 | } | |
3624 | ||
3625 | kvm_x86_ops->skip_emulated_instruction(vcpu); | |
37817f29 IE |
3626 | |
3627 | if (nseg_desc.type & 8) | |
34198bf8 | 3628 | ret = kvm_task_switch_32(vcpu, tss_selector, old_tss_base, |
37817f29 IE |
3629 | &nseg_desc); |
3630 | else | |
34198bf8 | 3631 | ret = kvm_task_switch_16(vcpu, tss_selector, old_tss_base, |
37817f29 IE |
3632 | &nseg_desc); |
3633 | ||
3634 | if (reason == TASK_SWITCH_CALL || reason == TASK_SWITCH_GATE) { | |
3635 | u32 eflags = kvm_x86_ops->get_rflags(vcpu); | |
3636 | kvm_x86_ops->set_rflags(vcpu, eflags | X86_EFLAGS_NT); | |
3637 | } | |
3638 | ||
3639 | if (reason != TASK_SWITCH_IRET) { | |
3fe913e7 | 3640 | nseg_desc.type |= (1 << 1); |
37817f29 IE |
3641 | save_guest_segment_descriptor(vcpu, tss_selector, |
3642 | &nseg_desc); | |
3643 | } | |
3644 | ||
3645 | kvm_x86_ops->set_cr0(vcpu, vcpu->arch.cr0 | X86_CR0_TS); | |
3646 | seg_desct_to_kvm_desct(&nseg_desc, tss_selector, &tr_seg); | |
3647 | tr_seg.type = 11; | |
3e6e0aab | 3648 | kvm_set_segment(vcpu, &tr_seg, VCPU_SREG_TR); |
37817f29 | 3649 | out: |
37817f29 IE |
3650 | return ret; |
3651 | } | |
3652 | EXPORT_SYMBOL_GPL(kvm_task_switch); | |
3653 | ||
b6c7a5dc HB |
3654 | int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
3655 | struct kvm_sregs *sregs) | |
3656 | { | |
3657 | int mmu_reset_needed = 0; | |
3658 | int i, pending_vec, max_bits; | |
3659 | struct descriptor_table dt; | |
3660 | ||
3661 | vcpu_load(vcpu); | |
3662 | ||
3663 | dt.limit = sregs->idt.limit; | |
3664 | dt.base = sregs->idt.base; | |
3665 | kvm_x86_ops->set_idt(vcpu, &dt); | |
3666 | dt.limit = sregs->gdt.limit; | |
3667 | dt.base = sregs->gdt.base; | |
3668 | kvm_x86_ops->set_gdt(vcpu, &dt); | |
3669 | ||
ad312c7c ZX |
3670 | vcpu->arch.cr2 = sregs->cr2; |
3671 | mmu_reset_needed |= vcpu->arch.cr3 != sregs->cr3; | |
3672 | vcpu->arch.cr3 = sregs->cr3; | |
b6c7a5dc | 3673 | |
2d3ad1f4 | 3674 | kvm_set_cr8(vcpu, sregs->cr8); |
b6c7a5dc | 3675 | |
ad312c7c | 3676 | mmu_reset_needed |= vcpu->arch.shadow_efer != sregs->efer; |
b6c7a5dc | 3677 | kvm_x86_ops->set_efer(vcpu, sregs->efer); |
b6c7a5dc HB |
3678 | kvm_set_apic_base(vcpu, sregs->apic_base); |
3679 | ||
3680 | kvm_x86_ops->decache_cr4_guest_bits(vcpu); | |
3681 | ||
ad312c7c | 3682 | mmu_reset_needed |= vcpu->arch.cr0 != sregs->cr0; |
b6c7a5dc | 3683 | kvm_x86_ops->set_cr0(vcpu, sregs->cr0); |
d7306163 | 3684 | vcpu->arch.cr0 = sregs->cr0; |
b6c7a5dc | 3685 | |
ad312c7c | 3686 | mmu_reset_needed |= vcpu->arch.cr4 != sregs->cr4; |
b6c7a5dc HB |
3687 | kvm_x86_ops->set_cr4(vcpu, sregs->cr4); |
3688 | if (!is_long_mode(vcpu) && is_pae(vcpu)) | |
ad312c7c | 3689 | load_pdptrs(vcpu, vcpu->arch.cr3); |
b6c7a5dc HB |
3690 | |
3691 | if (mmu_reset_needed) | |
3692 | kvm_mmu_reset_context(vcpu); | |
3693 | ||
3694 | if (!irqchip_in_kernel(vcpu->kvm)) { | |
ad312c7c ZX |
3695 | memcpy(vcpu->arch.irq_pending, sregs->interrupt_bitmap, |
3696 | sizeof vcpu->arch.irq_pending); | |
3697 | vcpu->arch.irq_summary = 0; | |
3698 | for (i = 0; i < ARRAY_SIZE(vcpu->arch.irq_pending); ++i) | |
3699 | if (vcpu->arch.irq_pending[i]) | |
3700 | __set_bit(i, &vcpu->arch.irq_summary); | |
b6c7a5dc HB |
3701 | } else { |
3702 | max_bits = (sizeof sregs->interrupt_bitmap) << 3; | |
3703 | pending_vec = find_first_bit( | |
3704 | (const unsigned long *)sregs->interrupt_bitmap, | |
3705 | max_bits); | |
3706 | /* Only pending external irq is handled here */ | |
3707 | if (pending_vec < max_bits) { | |
3708 | kvm_x86_ops->set_irq(vcpu, pending_vec); | |
3709 | pr_debug("Set back pending irq %d\n", | |
3710 | pending_vec); | |
3711 | } | |
e4825800 | 3712 | kvm_pic_clear_isr_ack(vcpu->kvm); |
b6c7a5dc HB |
3713 | } |
3714 | ||
3e6e0aab GT |
3715 | kvm_set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
3716 | kvm_set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
3717 | kvm_set_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
3718 | kvm_set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
3719 | kvm_set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
3720 | kvm_set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
b6c7a5dc | 3721 | |
3e6e0aab GT |
3722 | kvm_set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); |
3723 | kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
b6c7a5dc | 3724 | |
9c3e4aab MT |
3725 | /* Older userspace won't unhalt the vcpu on reset. */ |
3726 | if (vcpu->vcpu_id == 0 && kvm_rip_read(vcpu) == 0xfff0 && | |
3727 | sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 && | |
3728 | !(vcpu->arch.cr0 & X86_CR0_PE)) | |
3729 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; | |
3730 | ||
b6c7a5dc HB |
3731 | vcpu_put(vcpu); |
3732 | ||
3733 | return 0; | |
3734 | } | |
3735 | ||
3736 | int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu, | |
3737 | struct kvm_debug_guest *dbg) | |
3738 | { | |
3739 | int r; | |
3740 | ||
3741 | vcpu_load(vcpu); | |
3742 | ||
3743 | r = kvm_x86_ops->set_guest_debug(vcpu, dbg); | |
3744 | ||
3745 | vcpu_put(vcpu); | |
3746 | ||
3747 | return r; | |
3748 | } | |
3749 | ||
d0752060 HB |
3750 | /* |
3751 | * fxsave fpu state. Taken from x86_64/processor.h. To be killed when | |
3752 | * we have asm/x86/processor.h | |
3753 | */ | |
3754 | struct fxsave { | |
3755 | u16 cwd; | |
3756 | u16 swd; | |
3757 | u16 twd; | |
3758 | u16 fop; | |
3759 | u64 rip; | |
3760 | u64 rdp; | |
3761 | u32 mxcsr; | |
3762 | u32 mxcsr_mask; | |
3763 | u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */ | |
3764 | #ifdef CONFIG_X86_64 | |
3765 | u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */ | |
3766 | #else | |
3767 | u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */ | |
3768 | #endif | |
3769 | }; | |
3770 | ||
8b006791 ZX |
3771 | /* |
3772 | * Translate a guest virtual address to a guest physical address. | |
3773 | */ | |
3774 | int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, | |
3775 | struct kvm_translation *tr) | |
3776 | { | |
3777 | unsigned long vaddr = tr->linear_address; | |
3778 | gpa_t gpa; | |
3779 | ||
3780 | vcpu_load(vcpu); | |
72dc67a6 | 3781 | down_read(&vcpu->kvm->slots_lock); |
ad312c7c | 3782 | gpa = vcpu->arch.mmu.gva_to_gpa(vcpu, vaddr); |
72dc67a6 | 3783 | up_read(&vcpu->kvm->slots_lock); |
8b006791 ZX |
3784 | tr->physical_address = gpa; |
3785 | tr->valid = gpa != UNMAPPED_GVA; | |
3786 | tr->writeable = 1; | |
3787 | tr->usermode = 0; | |
8b006791 ZX |
3788 | vcpu_put(vcpu); |
3789 | ||
3790 | return 0; | |
3791 | } | |
3792 | ||
d0752060 HB |
3793 | int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) |
3794 | { | |
ad312c7c | 3795 | struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image; |
d0752060 HB |
3796 | |
3797 | vcpu_load(vcpu); | |
3798 | ||
3799 | memcpy(fpu->fpr, fxsave->st_space, 128); | |
3800 | fpu->fcw = fxsave->cwd; | |
3801 | fpu->fsw = fxsave->swd; | |
3802 | fpu->ftwx = fxsave->twd; | |
3803 | fpu->last_opcode = fxsave->fop; | |
3804 | fpu->last_ip = fxsave->rip; | |
3805 | fpu->last_dp = fxsave->rdp; | |
3806 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space); | |
3807 | ||
3808 | vcpu_put(vcpu); | |
3809 | ||
3810 | return 0; | |
3811 | } | |
3812 | ||
3813 | int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
3814 | { | |
ad312c7c | 3815 | struct fxsave *fxsave = (struct fxsave *)&vcpu->arch.guest_fx_image; |
d0752060 HB |
3816 | |
3817 | vcpu_load(vcpu); | |
3818 | ||
3819 | memcpy(fxsave->st_space, fpu->fpr, 128); | |
3820 | fxsave->cwd = fpu->fcw; | |
3821 | fxsave->swd = fpu->fsw; | |
3822 | fxsave->twd = fpu->ftwx; | |
3823 | fxsave->fop = fpu->last_opcode; | |
3824 | fxsave->rip = fpu->last_ip; | |
3825 | fxsave->rdp = fpu->last_dp; | |
3826 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space); | |
3827 | ||
3828 | vcpu_put(vcpu); | |
3829 | ||
3830 | return 0; | |
3831 | } | |
3832 | ||
3833 | void fx_init(struct kvm_vcpu *vcpu) | |
3834 | { | |
3835 | unsigned after_mxcsr_mask; | |
3836 | ||
bc1a34f1 AA |
3837 | /* |
3838 | * Touch the fpu the first time in non atomic context as if | |
3839 | * this is the first fpu instruction the exception handler | |
3840 | * will fire before the instruction returns and it'll have to | |
3841 | * allocate ram with GFP_KERNEL. | |
3842 | */ | |
3843 | if (!used_math()) | |
d6e88aec | 3844 | kvm_fx_save(&vcpu->arch.host_fx_image); |
bc1a34f1 | 3845 | |
d0752060 HB |
3846 | /* Initialize guest FPU by resetting ours and saving into guest's */ |
3847 | preempt_disable(); | |
d6e88aec AK |
3848 | kvm_fx_save(&vcpu->arch.host_fx_image); |
3849 | kvm_fx_finit(); | |
3850 | kvm_fx_save(&vcpu->arch.guest_fx_image); | |
3851 | kvm_fx_restore(&vcpu->arch.host_fx_image); | |
d0752060 HB |
3852 | preempt_enable(); |
3853 | ||
ad312c7c | 3854 | vcpu->arch.cr0 |= X86_CR0_ET; |
d0752060 | 3855 | after_mxcsr_mask = offsetof(struct i387_fxsave_struct, st_space); |
ad312c7c ZX |
3856 | vcpu->arch.guest_fx_image.mxcsr = 0x1f80; |
3857 | memset((void *)&vcpu->arch.guest_fx_image + after_mxcsr_mask, | |
d0752060 HB |
3858 | 0, sizeof(struct i387_fxsave_struct) - after_mxcsr_mask); |
3859 | } | |
3860 | EXPORT_SYMBOL_GPL(fx_init); | |
3861 | ||
3862 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) | |
3863 | { | |
3864 | if (!vcpu->fpu_active || vcpu->guest_fpu_loaded) | |
3865 | return; | |
3866 | ||
3867 | vcpu->guest_fpu_loaded = 1; | |
d6e88aec AK |
3868 | kvm_fx_save(&vcpu->arch.host_fx_image); |
3869 | kvm_fx_restore(&vcpu->arch.guest_fx_image); | |
d0752060 HB |
3870 | } |
3871 | EXPORT_SYMBOL_GPL(kvm_load_guest_fpu); | |
3872 | ||
3873 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) | |
3874 | { | |
3875 | if (!vcpu->guest_fpu_loaded) | |
3876 | return; | |
3877 | ||
3878 | vcpu->guest_fpu_loaded = 0; | |
d6e88aec AK |
3879 | kvm_fx_save(&vcpu->arch.guest_fx_image); |
3880 | kvm_fx_restore(&vcpu->arch.host_fx_image); | |
f096ed85 | 3881 | ++vcpu->stat.fpu_reload; |
d0752060 HB |
3882 | } |
3883 | EXPORT_SYMBOL_GPL(kvm_put_guest_fpu); | |
e9b11c17 ZX |
3884 | |
3885 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) | |
3886 | { | |
3887 | kvm_x86_ops->vcpu_free(vcpu); | |
3888 | } | |
3889 | ||
3890 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, | |
3891 | unsigned int id) | |
3892 | { | |
26e5215f AK |
3893 | return kvm_x86_ops->vcpu_create(kvm, id); |
3894 | } | |
e9b11c17 | 3895 | |
26e5215f AK |
3896 | int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) |
3897 | { | |
3898 | int r; | |
e9b11c17 ZX |
3899 | |
3900 | /* We do fxsave: this must be aligned. */ | |
ad312c7c | 3901 | BUG_ON((unsigned long)&vcpu->arch.host_fx_image & 0xF); |
e9b11c17 ZX |
3902 | |
3903 | vcpu_load(vcpu); | |
3904 | r = kvm_arch_vcpu_reset(vcpu); | |
3905 | if (r == 0) | |
3906 | r = kvm_mmu_setup(vcpu); | |
3907 | vcpu_put(vcpu); | |
3908 | if (r < 0) | |
3909 | goto free_vcpu; | |
3910 | ||
26e5215f | 3911 | return 0; |
e9b11c17 ZX |
3912 | free_vcpu: |
3913 | kvm_x86_ops->vcpu_free(vcpu); | |
26e5215f | 3914 | return r; |
e9b11c17 ZX |
3915 | } |
3916 | ||
d40ccc62 | 3917 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
e9b11c17 ZX |
3918 | { |
3919 | vcpu_load(vcpu); | |
3920 | kvm_mmu_unload(vcpu); | |
3921 | vcpu_put(vcpu); | |
3922 | ||
3923 | kvm_x86_ops->vcpu_free(vcpu); | |
3924 | } | |
3925 | ||
3926 | int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu) | |
3927 | { | |
448fa4a9 JK |
3928 | vcpu->arch.nmi_pending = false; |
3929 | vcpu->arch.nmi_injected = false; | |
3930 | ||
e9b11c17 ZX |
3931 | return kvm_x86_ops->vcpu_reset(vcpu); |
3932 | } | |
3933 | ||
3934 | void kvm_arch_hardware_enable(void *garbage) | |
3935 | { | |
3936 | kvm_x86_ops->hardware_enable(garbage); | |
3937 | } | |
3938 | ||
3939 | void kvm_arch_hardware_disable(void *garbage) | |
3940 | { | |
3941 | kvm_x86_ops->hardware_disable(garbage); | |
3942 | } | |
3943 | ||
3944 | int kvm_arch_hardware_setup(void) | |
3945 | { | |
3946 | return kvm_x86_ops->hardware_setup(); | |
3947 | } | |
3948 | ||
3949 | void kvm_arch_hardware_unsetup(void) | |
3950 | { | |
3951 | kvm_x86_ops->hardware_unsetup(); | |
3952 | } | |
3953 | ||
3954 | void kvm_arch_check_processor_compat(void *rtn) | |
3955 | { | |
3956 | kvm_x86_ops->check_processor_compatibility(rtn); | |
3957 | } | |
3958 | ||
3959 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) | |
3960 | { | |
3961 | struct page *page; | |
3962 | struct kvm *kvm; | |
3963 | int r; | |
3964 | ||
3965 | BUG_ON(vcpu->kvm == NULL); | |
3966 | kvm = vcpu->kvm; | |
3967 | ||
ad312c7c | 3968 | vcpu->arch.mmu.root_hpa = INVALID_PAGE; |
e9b11c17 | 3969 | if (!irqchip_in_kernel(kvm) || vcpu->vcpu_id == 0) |
a4535290 | 3970 | vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; |
e9b11c17 | 3971 | else |
a4535290 | 3972 | vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED; |
e9b11c17 ZX |
3973 | |
3974 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
3975 | if (!page) { | |
3976 | r = -ENOMEM; | |
3977 | goto fail; | |
3978 | } | |
ad312c7c | 3979 | vcpu->arch.pio_data = page_address(page); |
e9b11c17 ZX |
3980 | |
3981 | r = kvm_mmu_create(vcpu); | |
3982 | if (r < 0) | |
3983 | goto fail_free_pio_data; | |
3984 | ||
3985 | if (irqchip_in_kernel(kvm)) { | |
3986 | r = kvm_create_lapic(vcpu); | |
3987 | if (r < 0) | |
3988 | goto fail_mmu_destroy; | |
3989 | } | |
3990 | ||
3991 | return 0; | |
3992 | ||
3993 | fail_mmu_destroy: | |
3994 | kvm_mmu_destroy(vcpu); | |
3995 | fail_free_pio_data: | |
ad312c7c | 3996 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 ZX |
3997 | fail: |
3998 | return r; | |
3999 | } | |
4000 | ||
4001 | void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) | |
4002 | { | |
4003 | kvm_free_lapic(vcpu); | |
3200f405 | 4004 | down_read(&vcpu->kvm->slots_lock); |
e9b11c17 | 4005 | kvm_mmu_destroy(vcpu); |
3200f405 | 4006 | up_read(&vcpu->kvm->slots_lock); |
ad312c7c | 4007 | free_page((unsigned long)vcpu->arch.pio_data); |
e9b11c17 | 4008 | } |
d19a9cd2 ZX |
4009 | |
4010 | struct kvm *kvm_arch_create_vm(void) | |
4011 | { | |
4012 | struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); | |
4013 | ||
4014 | if (!kvm) | |
4015 | return ERR_PTR(-ENOMEM); | |
4016 | ||
f05e70ac | 4017 | INIT_LIST_HEAD(&kvm->arch.active_mmu_pages); |
4d5c5d0f | 4018 | INIT_LIST_HEAD(&kvm->arch.assigned_dev_head); |
d19a9cd2 | 4019 | |
5550af4d SY |
4020 | /* Reserve bit 0 of irq_sources_bitmap for userspace irq source */ |
4021 | set_bit(KVM_USERSPACE_IRQ_SOURCE_ID, &kvm->arch.irq_sources_bitmap); | |
4022 | ||
d19a9cd2 ZX |
4023 | return kvm; |
4024 | } | |
4025 | ||
4026 | static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu) | |
4027 | { | |
4028 | vcpu_load(vcpu); | |
4029 | kvm_mmu_unload(vcpu); | |
4030 | vcpu_put(vcpu); | |
4031 | } | |
4032 | ||
4033 | static void kvm_free_vcpus(struct kvm *kvm) | |
4034 | { | |
4035 | unsigned int i; | |
4036 | ||
4037 | /* | |
4038 | * Unpin any mmu pages first. | |
4039 | */ | |
4040 | for (i = 0; i < KVM_MAX_VCPUS; ++i) | |
4041 | if (kvm->vcpus[i]) | |
4042 | kvm_unload_vcpu_mmu(kvm->vcpus[i]); | |
4043 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
4044 | if (kvm->vcpus[i]) { | |
4045 | kvm_arch_vcpu_free(kvm->vcpus[i]); | |
4046 | kvm->vcpus[i] = NULL; | |
4047 | } | |
4048 | } | |
4049 | ||
4050 | } | |
4051 | ||
4052 | void kvm_arch_destroy_vm(struct kvm *kvm) | |
4053 | { | |
62c476c7 | 4054 | kvm_iommu_unmap_guest(kvm); |
bfadaded | 4055 | kvm_free_all_assigned_devices(kvm); |
7837699f | 4056 | kvm_free_pit(kvm); |
d7deeeb0 ZX |
4057 | kfree(kvm->arch.vpic); |
4058 | kfree(kvm->arch.vioapic); | |
d19a9cd2 ZX |
4059 | kvm_free_vcpus(kvm); |
4060 | kvm_free_physmem(kvm); | |
3d45830c AK |
4061 | if (kvm->arch.apic_access_page) |
4062 | put_page(kvm->arch.apic_access_page); | |
b7ebfb05 SY |
4063 | if (kvm->arch.ept_identity_pagetable) |
4064 | put_page(kvm->arch.ept_identity_pagetable); | |
d19a9cd2 ZX |
4065 | kfree(kvm); |
4066 | } | |
0de10343 ZX |
4067 | |
4068 | int kvm_arch_set_memory_region(struct kvm *kvm, | |
4069 | struct kvm_userspace_memory_region *mem, | |
4070 | struct kvm_memory_slot old, | |
4071 | int user_alloc) | |
4072 | { | |
4073 | int npages = mem->memory_size >> PAGE_SHIFT; | |
4074 | struct kvm_memory_slot *memslot = &kvm->memslots[mem->slot]; | |
4075 | ||
4076 | /*To keep backward compatibility with older userspace, | |
4077 | *x86 needs to hanlde !user_alloc case. | |
4078 | */ | |
4079 | if (!user_alloc) { | |
4080 | if (npages && !old.rmap) { | |
604b38ac AA |
4081 | unsigned long userspace_addr; |
4082 | ||
72dc67a6 | 4083 | down_write(¤t->mm->mmap_sem); |
604b38ac AA |
4084 | userspace_addr = do_mmap(NULL, 0, |
4085 | npages * PAGE_SIZE, | |
4086 | PROT_READ | PROT_WRITE, | |
acee3c04 | 4087 | MAP_PRIVATE | MAP_ANONYMOUS, |
604b38ac | 4088 | 0); |
72dc67a6 | 4089 | up_write(¤t->mm->mmap_sem); |
0de10343 | 4090 | |
604b38ac AA |
4091 | if (IS_ERR((void *)userspace_addr)) |
4092 | return PTR_ERR((void *)userspace_addr); | |
4093 | ||
4094 | /* set userspace_addr atomically for kvm_hva_to_rmapp */ | |
4095 | spin_lock(&kvm->mmu_lock); | |
4096 | memslot->userspace_addr = userspace_addr; | |
4097 | spin_unlock(&kvm->mmu_lock); | |
0de10343 ZX |
4098 | } else { |
4099 | if (!old.user_alloc && old.rmap) { | |
4100 | int ret; | |
4101 | ||
72dc67a6 | 4102 | down_write(¤t->mm->mmap_sem); |
0de10343 ZX |
4103 | ret = do_munmap(current->mm, old.userspace_addr, |
4104 | old.npages * PAGE_SIZE); | |
72dc67a6 | 4105 | up_write(¤t->mm->mmap_sem); |
0de10343 ZX |
4106 | if (ret < 0) |
4107 | printk(KERN_WARNING | |
4108 | "kvm_vm_ioctl_set_memory_region: " | |
4109 | "failed to munmap memory\n"); | |
4110 | } | |
4111 | } | |
4112 | } | |
4113 | ||
f05e70ac | 4114 | if (!kvm->arch.n_requested_mmu_pages) { |
0de10343 ZX |
4115 | unsigned int nr_mmu_pages = kvm_mmu_calculate_mmu_pages(kvm); |
4116 | kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages); | |
4117 | } | |
4118 | ||
4119 | kvm_mmu_slot_remove_write_access(kvm, mem->slot); | |
4120 | kvm_flush_remote_tlbs(kvm); | |
4121 | ||
4122 | return 0; | |
4123 | } | |
1d737c8a | 4124 | |
34d4cb8f MT |
4125 | void kvm_arch_flush_shadow(struct kvm *kvm) |
4126 | { | |
4127 | kvm_mmu_zap_all(kvm); | |
4128 | } | |
4129 | ||
1d737c8a ZX |
4130 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu) |
4131 | { | |
a4535290 AK |
4132 | return vcpu->arch.mp_state == KVM_MP_STATE_RUNNABLE |
4133 | || vcpu->arch.mp_state == KVM_MP_STATE_SIPI_RECEIVED; | |
1d737c8a | 4134 | } |
5736199a ZX |
4135 | |
4136 | static void vcpu_kick_intr(void *info) | |
4137 | { | |
4138 | #ifdef DEBUG | |
4139 | struct kvm_vcpu *vcpu = (struct kvm_vcpu *)info; | |
4140 | printk(KERN_DEBUG "vcpu_kick_intr %p \n", vcpu); | |
4141 | #endif | |
4142 | } | |
4143 | ||
4144 | void kvm_vcpu_kick(struct kvm_vcpu *vcpu) | |
4145 | { | |
4146 | int ipi_pcpu = vcpu->cpu; | |
e9571ed5 | 4147 | int cpu = get_cpu(); |
5736199a ZX |
4148 | |
4149 | if (waitqueue_active(&vcpu->wq)) { | |
4150 | wake_up_interruptible(&vcpu->wq); | |
4151 | ++vcpu->stat.halt_wakeup; | |
4152 | } | |
e9571ed5 MT |
4153 | /* |
4154 | * We may be called synchronously with irqs disabled in guest mode, | |
4155 | * So need not to call smp_call_function_single() in that case. | |
4156 | */ | |
4157 | if (vcpu->guest_mode && vcpu->cpu != cpu) | |
8691e5a8 | 4158 | smp_call_function_single(ipi_pcpu, vcpu_kick_intr, vcpu, 0); |
e9571ed5 | 4159 | put_cpu(); |
5736199a | 4160 | } |