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Commit | Line | Data |
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6aa8b732 AK |
1 | /* |
2 | * Kernel-based Virtual Machine driver for Linux | |
3 | * | |
4 | * This module enables machines with Intel VT-x extensions to run virtual | |
5 | * machines without emulation or binary translation. | |
6 | * | |
7 | * Copyright (C) 2006 Qumranet, Inc. | |
8 | * | |
9 | * Authors: | |
10 | * Avi Kivity <avi@qumranet.com> | |
11 | * Yaniv Kamay <yaniv@qumranet.com> | |
12 | * | |
13 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
14 | * the COPYING file in the top-level directory. | |
15 | * | |
16 | */ | |
17 | ||
18 | #include "kvm.h" | |
e495606d AK |
19 | #include "x86_emulate.h" |
20 | #include "segment_descriptor.h" | |
85f455f7 | 21 | #include "irq.h" |
6aa8b732 AK |
22 | |
23 | #include <linux/kvm.h> | |
24 | #include <linux/module.h> | |
25 | #include <linux/errno.h> | |
6aa8b732 AK |
26 | #include <linux/percpu.h> |
27 | #include <linux/gfp.h> | |
6aa8b732 AK |
28 | #include <linux/mm.h> |
29 | #include <linux/miscdevice.h> | |
30 | #include <linux/vmalloc.h> | |
6aa8b732 | 31 | #include <linux/reboot.h> |
6aa8b732 AK |
32 | #include <linux/debugfs.h> |
33 | #include <linux/highmem.h> | |
34 | #include <linux/file.h> | |
59ae6c6b | 35 | #include <linux/sysdev.h> |
774c47f1 | 36 | #include <linux/cpu.h> |
e8edc6e0 | 37 | #include <linux/sched.h> |
d9e368d6 AK |
38 | #include <linux/cpumask.h> |
39 | #include <linux/smp.h> | |
d6d28168 | 40 | #include <linux/anon_inodes.h> |
04d2cc77 | 41 | #include <linux/profile.h> |
7aa81cc0 | 42 | #include <linux/kvm_para.h> |
6fc138d2 | 43 | #include <linux/pagemap.h> |
6aa8b732 | 44 | |
e495606d AK |
45 | #include <asm/processor.h> |
46 | #include <asm/msr.h> | |
47 | #include <asm/io.h> | |
48 | #include <asm/uaccess.h> | |
49 | #include <asm/desc.h> | |
6aa8b732 AK |
50 | |
51 | MODULE_AUTHOR("Qumranet"); | |
52 | MODULE_LICENSE("GPL"); | |
53 | ||
133de902 AK |
54 | static DEFINE_SPINLOCK(kvm_lock); |
55 | static LIST_HEAD(vm_list); | |
56 | ||
1b6c0168 AK |
57 | static cpumask_t cpus_hardware_enabled; |
58 | ||
cbdd1bea | 59 | struct kvm_x86_ops *kvm_x86_ops; |
c16f862d RR |
60 | struct kmem_cache *kvm_vcpu_cache; |
61 | EXPORT_SYMBOL_GPL(kvm_vcpu_cache); | |
1165f5fe | 62 | |
15ad7146 AK |
63 | static __read_mostly struct preempt_ops kvm_preempt_ops; |
64 | ||
1165f5fe | 65 | #define STAT_OFFSET(x) offsetof(struct kvm_vcpu, stat.x) |
6aa8b732 AK |
66 | |
67 | static struct kvm_stats_debugfs_item { | |
68 | const char *name; | |
1165f5fe | 69 | int offset; |
6aa8b732 AK |
70 | struct dentry *dentry; |
71 | } debugfs_entries[] = { | |
1165f5fe AK |
72 | { "pf_fixed", STAT_OFFSET(pf_fixed) }, |
73 | { "pf_guest", STAT_OFFSET(pf_guest) }, | |
74 | { "tlb_flush", STAT_OFFSET(tlb_flush) }, | |
75 | { "invlpg", STAT_OFFSET(invlpg) }, | |
76 | { "exits", STAT_OFFSET(exits) }, | |
77 | { "io_exits", STAT_OFFSET(io_exits) }, | |
78 | { "mmio_exits", STAT_OFFSET(mmio_exits) }, | |
79 | { "signal_exits", STAT_OFFSET(signal_exits) }, | |
80 | { "irq_window", STAT_OFFSET(irq_window_exits) }, | |
81 | { "halt_exits", STAT_OFFSET(halt_exits) }, | |
b6958ce4 | 82 | { "halt_wakeup", STAT_OFFSET(halt_wakeup) }, |
1165f5fe AK |
83 | { "request_irq", STAT_OFFSET(request_irq_exits) }, |
84 | { "irq_exits", STAT_OFFSET(irq_exits) }, | |
e6adf283 | 85 | { "light_exits", STAT_OFFSET(light_exits) }, |
2cc51560 | 86 | { "efer_reload", STAT_OFFSET(efer_reload) }, |
1165f5fe | 87 | { NULL } |
6aa8b732 AK |
88 | }; |
89 | ||
90 | static struct dentry *debugfs_dir; | |
91 | ||
92 | #define MAX_IO_MSRS 256 | |
93 | ||
707d92fa RR |
94 | #define CR0_RESERVED_BITS \ |
95 | (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \ | |
96 | | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \ | |
97 | | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG)) | |
66aee91a RR |
98 | #define CR4_RESERVED_BITS \ |
99 | (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\ | |
100 | | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \ | |
101 | | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \ | |
102 | | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE)) | |
103 | ||
7075bc81 | 104 | #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR) |
6aa8b732 AK |
105 | #define EFER_RESERVED_BITS 0xfffffffffffff2fe |
106 | ||
05b3e0c2 | 107 | #ifdef CONFIG_X86_64 |
d77c26fc | 108 | /* LDT or TSS descriptor in the GDT. 16 bytes. */ |
6aa8b732 AK |
109 | struct segment_descriptor_64 { |
110 | struct segment_descriptor s; | |
111 | u32 base_higher; | |
112 | u32 pad_zero; | |
113 | }; | |
114 | ||
115 | #endif | |
116 | ||
bccf2150 AK |
117 | static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl, |
118 | unsigned long arg); | |
119 | ||
6aa8b732 AK |
120 | unsigned long segment_base(u16 selector) |
121 | { | |
122 | struct descriptor_table gdt; | |
123 | struct segment_descriptor *d; | |
124 | unsigned long table_base; | |
6aa8b732 AK |
125 | unsigned long v; |
126 | ||
127 | if (selector == 0) | |
128 | return 0; | |
129 | ||
d77c26fc | 130 | asm("sgdt %0" : "=m"(gdt)); |
6aa8b732 AK |
131 | table_base = gdt.base; |
132 | ||
133 | if (selector & 4) { /* from ldt */ | |
134 | u16 ldt_selector; | |
135 | ||
d77c26fc | 136 | asm("sldt %0" : "=g"(ldt_selector)); |
6aa8b732 AK |
137 | table_base = segment_base(ldt_selector); |
138 | } | |
139 | d = (struct segment_descriptor *)(table_base + (selector & ~7)); | |
d77c26fc MD |
140 | v = d->base_low | ((unsigned long)d->base_mid << 16) | |
141 | ((unsigned long)d->base_high << 24); | |
05b3e0c2 | 142 | #ifdef CONFIG_X86_64 |
d77c26fc MD |
143 | if (d->system == 0 && (d->type == 2 || d->type == 9 || d->type == 11)) |
144 | v |= ((unsigned long) \ | |
145 | ((struct segment_descriptor_64 *)d)->base_higher) << 32; | |
6aa8b732 AK |
146 | #endif |
147 | return v; | |
148 | } | |
149 | EXPORT_SYMBOL_GPL(segment_base); | |
150 | ||
5aacf0ca JM |
151 | static inline int valid_vcpu(int n) |
152 | { | |
153 | return likely(n >= 0 && n < KVM_MAX_VCPUS); | |
154 | } | |
155 | ||
7702fd1f AK |
156 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) |
157 | { | |
158 | if (!vcpu->fpu_active || vcpu->guest_fpu_loaded) | |
159 | return; | |
160 | ||
161 | vcpu->guest_fpu_loaded = 1; | |
b114b080 RR |
162 | fx_save(&vcpu->host_fx_image); |
163 | fx_restore(&vcpu->guest_fx_image); | |
7702fd1f AK |
164 | } |
165 | EXPORT_SYMBOL_GPL(kvm_load_guest_fpu); | |
166 | ||
167 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) | |
168 | { | |
169 | if (!vcpu->guest_fpu_loaded) | |
170 | return; | |
171 | ||
172 | vcpu->guest_fpu_loaded = 0; | |
b114b080 RR |
173 | fx_save(&vcpu->guest_fx_image); |
174 | fx_restore(&vcpu->host_fx_image); | |
7702fd1f AK |
175 | } |
176 | EXPORT_SYMBOL_GPL(kvm_put_guest_fpu); | |
177 | ||
bccf2150 AK |
178 | /* |
179 | * Switches to specified vcpu, until a matching vcpu_put() | |
180 | */ | |
181 | static void vcpu_load(struct kvm_vcpu *vcpu) | |
6aa8b732 | 182 | { |
15ad7146 AK |
183 | int cpu; |
184 | ||
bccf2150 | 185 | mutex_lock(&vcpu->mutex); |
15ad7146 AK |
186 | cpu = get_cpu(); |
187 | preempt_notifier_register(&vcpu->preempt_notifier); | |
cbdd1bea | 188 | kvm_x86_ops->vcpu_load(vcpu, cpu); |
15ad7146 | 189 | put_cpu(); |
6aa8b732 AK |
190 | } |
191 | ||
6aa8b732 AK |
192 | static void vcpu_put(struct kvm_vcpu *vcpu) |
193 | { | |
15ad7146 | 194 | preempt_disable(); |
cbdd1bea | 195 | kvm_x86_ops->vcpu_put(vcpu); |
15ad7146 AK |
196 | preempt_notifier_unregister(&vcpu->preempt_notifier); |
197 | preempt_enable(); | |
6aa8b732 AK |
198 | mutex_unlock(&vcpu->mutex); |
199 | } | |
200 | ||
d9e368d6 AK |
201 | static void ack_flush(void *_completed) |
202 | { | |
d9e368d6 AK |
203 | } |
204 | ||
205 | void kvm_flush_remote_tlbs(struct kvm *kvm) | |
206 | { | |
49d3bd7e | 207 | int i, cpu; |
d9e368d6 AK |
208 | cpumask_t cpus; |
209 | struct kvm_vcpu *vcpu; | |
d9e368d6 | 210 | |
d9e368d6 | 211 | cpus_clear(cpus); |
fb3f0f51 RR |
212 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
213 | vcpu = kvm->vcpus[i]; | |
214 | if (!vcpu) | |
215 | continue; | |
d9e368d6 AK |
216 | if (test_and_set_bit(KVM_TLB_FLUSH, &vcpu->requests)) |
217 | continue; | |
218 | cpu = vcpu->cpu; | |
219 | if (cpu != -1 && cpu != raw_smp_processor_id()) | |
49d3bd7e | 220 | cpu_set(cpu, cpus); |
d9e368d6 | 221 | } |
49d3bd7e | 222 | smp_call_function_mask(cpus, ack_flush, NULL, 1); |
d9e368d6 AK |
223 | } |
224 | ||
fb3f0f51 RR |
225 | int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id) |
226 | { | |
227 | struct page *page; | |
228 | int r; | |
229 | ||
230 | mutex_init(&vcpu->mutex); | |
231 | vcpu->cpu = -1; | |
232 | vcpu->mmu.root_hpa = INVALID_PAGE; | |
233 | vcpu->kvm = kvm; | |
234 | vcpu->vcpu_id = id; | |
c5ec1534 HQ |
235 | if (!irqchip_in_kernel(kvm) || id == 0) |
236 | vcpu->mp_state = VCPU_MP_STATE_RUNNABLE; | |
237 | else | |
238 | vcpu->mp_state = VCPU_MP_STATE_UNINITIALIZED; | |
b6958ce4 | 239 | init_waitqueue_head(&vcpu->wq); |
fb3f0f51 RR |
240 | |
241 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
242 | if (!page) { | |
243 | r = -ENOMEM; | |
244 | goto fail; | |
245 | } | |
246 | vcpu->run = page_address(page); | |
247 | ||
248 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
249 | if (!page) { | |
250 | r = -ENOMEM; | |
251 | goto fail_free_run; | |
252 | } | |
253 | vcpu->pio_data = page_address(page); | |
254 | ||
fb3f0f51 RR |
255 | r = kvm_mmu_create(vcpu); |
256 | if (r < 0) | |
257 | goto fail_free_pio_data; | |
258 | ||
76fafa5e RR |
259 | if (irqchip_in_kernel(kvm)) { |
260 | r = kvm_create_lapic(vcpu); | |
261 | if (r < 0) | |
262 | goto fail_mmu_destroy; | |
263 | } | |
264 | ||
fb3f0f51 RR |
265 | return 0; |
266 | ||
76fafa5e RR |
267 | fail_mmu_destroy: |
268 | kvm_mmu_destroy(vcpu); | |
fb3f0f51 RR |
269 | fail_free_pio_data: |
270 | free_page((unsigned long)vcpu->pio_data); | |
271 | fail_free_run: | |
272 | free_page((unsigned long)vcpu->run); | |
273 | fail: | |
76fafa5e | 274 | return r; |
fb3f0f51 RR |
275 | } |
276 | EXPORT_SYMBOL_GPL(kvm_vcpu_init); | |
277 | ||
278 | void kvm_vcpu_uninit(struct kvm_vcpu *vcpu) | |
279 | { | |
d589444e | 280 | kvm_free_lapic(vcpu); |
fb3f0f51 RR |
281 | kvm_mmu_destroy(vcpu); |
282 | free_page((unsigned long)vcpu->pio_data); | |
283 | free_page((unsigned long)vcpu->run); | |
284 | } | |
285 | EXPORT_SYMBOL_GPL(kvm_vcpu_uninit); | |
286 | ||
f17abe9a | 287 | static struct kvm *kvm_create_vm(void) |
6aa8b732 AK |
288 | { |
289 | struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); | |
6aa8b732 AK |
290 | |
291 | if (!kvm) | |
f17abe9a | 292 | return ERR_PTR(-ENOMEM); |
6aa8b732 | 293 | |
74906345 | 294 | kvm_io_bus_init(&kvm->pio_bus); |
11ec2804 | 295 | mutex_init(&kvm->lock); |
6aa8b732 | 296 | INIT_LIST_HEAD(&kvm->active_mmu_pages); |
2eeb2e94 | 297 | kvm_io_bus_init(&kvm->mmio_bus); |
5e58cfe4 RR |
298 | spin_lock(&kvm_lock); |
299 | list_add(&kvm->vm_list, &vm_list); | |
300 | spin_unlock(&kvm_lock); | |
f17abe9a AK |
301 | return kvm; |
302 | } | |
303 | ||
6fc138d2 IE |
304 | static void kvm_free_userspace_physmem(struct kvm_memory_slot *free) |
305 | { | |
306 | int i; | |
307 | ||
308 | for (i = 0; i < free->npages; ++i) { | |
309 | if (free->phys_mem[i]) { | |
310 | if (!PageReserved(free->phys_mem[i])) | |
311 | SetPageDirty(free->phys_mem[i]); | |
312 | page_cache_release(free->phys_mem[i]); | |
313 | } | |
314 | } | |
315 | } | |
316 | ||
317 | static void kvm_free_kernel_physmem(struct kvm_memory_slot *free) | |
318 | { | |
319 | int i; | |
320 | ||
321 | for (i = 0; i < free->npages; ++i) | |
322 | if (free->phys_mem[i]) | |
323 | __free_page(free->phys_mem[i]); | |
324 | } | |
325 | ||
6aa8b732 AK |
326 | /* |
327 | * Free any memory in @free but not in @dont. | |
328 | */ | |
329 | static void kvm_free_physmem_slot(struct kvm_memory_slot *free, | |
330 | struct kvm_memory_slot *dont) | |
331 | { | |
6aa8b732 AK |
332 | if (!dont || free->phys_mem != dont->phys_mem) |
333 | if (free->phys_mem) { | |
6fc138d2 IE |
334 | if (free->user_alloc) |
335 | kvm_free_userspace_physmem(free); | |
336 | else | |
337 | kvm_free_kernel_physmem(free); | |
6aa8b732 AK |
338 | vfree(free->phys_mem); |
339 | } | |
290fc38d IE |
340 | if (!dont || free->rmap != dont->rmap) |
341 | vfree(free->rmap); | |
6aa8b732 AK |
342 | |
343 | if (!dont || free->dirty_bitmap != dont->dirty_bitmap) | |
344 | vfree(free->dirty_bitmap); | |
345 | ||
8b6d44c7 | 346 | free->phys_mem = NULL; |
6aa8b732 | 347 | free->npages = 0; |
8b6d44c7 | 348 | free->dirty_bitmap = NULL; |
6aa8b732 AK |
349 | } |
350 | ||
351 | static void kvm_free_physmem(struct kvm *kvm) | |
352 | { | |
353 | int i; | |
354 | ||
355 | for (i = 0; i < kvm->nmemslots; ++i) | |
8b6d44c7 | 356 | kvm_free_physmem_slot(&kvm->memslots[i], NULL); |
6aa8b732 AK |
357 | } |
358 | ||
039576c0 AK |
359 | static void free_pio_guest_pages(struct kvm_vcpu *vcpu) |
360 | { | |
361 | int i; | |
362 | ||
3077c451 | 363 | for (i = 0; i < ARRAY_SIZE(vcpu->pio.guest_pages); ++i) |
039576c0 AK |
364 | if (vcpu->pio.guest_pages[i]) { |
365 | __free_page(vcpu->pio.guest_pages[i]); | |
366 | vcpu->pio.guest_pages[i] = NULL; | |
367 | } | |
368 | } | |
369 | ||
7b53aa56 AK |
370 | static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu) |
371 | { | |
7b53aa56 AK |
372 | vcpu_load(vcpu); |
373 | kvm_mmu_unload(vcpu); | |
374 | vcpu_put(vcpu); | |
375 | } | |
376 | ||
6aa8b732 AK |
377 | static void kvm_free_vcpus(struct kvm *kvm) |
378 | { | |
379 | unsigned int i; | |
380 | ||
7b53aa56 AK |
381 | /* |
382 | * Unpin any mmu pages first. | |
383 | */ | |
384 | for (i = 0; i < KVM_MAX_VCPUS; ++i) | |
fb3f0f51 RR |
385 | if (kvm->vcpus[i]) |
386 | kvm_unload_vcpu_mmu(kvm->vcpus[i]); | |
387 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
388 | if (kvm->vcpus[i]) { | |
cbdd1bea | 389 | kvm_x86_ops->vcpu_free(kvm->vcpus[i]); |
fb3f0f51 RR |
390 | kvm->vcpus[i] = NULL; |
391 | } | |
392 | } | |
393 | ||
6aa8b732 AK |
394 | } |
395 | ||
f17abe9a AK |
396 | static void kvm_destroy_vm(struct kvm *kvm) |
397 | { | |
133de902 AK |
398 | spin_lock(&kvm_lock); |
399 | list_del(&kvm->vm_list); | |
400 | spin_unlock(&kvm_lock); | |
74906345 | 401 | kvm_io_bus_destroy(&kvm->pio_bus); |
2eeb2e94 | 402 | kvm_io_bus_destroy(&kvm->mmio_bus); |
85f455f7 | 403 | kfree(kvm->vpic); |
1fd4f2a5 | 404 | kfree(kvm->vioapic); |
6aa8b732 AK |
405 | kvm_free_vcpus(kvm); |
406 | kvm_free_physmem(kvm); | |
407 | kfree(kvm); | |
f17abe9a AK |
408 | } |
409 | ||
410 | static int kvm_vm_release(struct inode *inode, struct file *filp) | |
411 | { | |
412 | struct kvm *kvm = filp->private_data; | |
413 | ||
414 | kvm_destroy_vm(kvm); | |
6aa8b732 AK |
415 | return 0; |
416 | } | |
417 | ||
418 | static void inject_gp(struct kvm_vcpu *vcpu) | |
419 | { | |
cbdd1bea | 420 | kvm_x86_ops->inject_gp(vcpu, 0); |
6aa8b732 AK |
421 | } |
422 | ||
1342d353 AK |
423 | /* |
424 | * Load the pae pdptrs. Return true is they are all valid. | |
425 | */ | |
426 | static int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3) | |
6aa8b732 AK |
427 | { |
428 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; | |
1342d353 | 429 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; |
6aa8b732 | 430 | int i; |
1342d353 | 431 | int ret; |
c820c2aa | 432 | u64 pdpte[ARRAY_SIZE(vcpu->pdptrs)]; |
6aa8b732 | 433 | |
11ec2804 | 434 | mutex_lock(&vcpu->kvm->lock); |
195aefde IE |
435 | ret = kvm_read_guest_page(vcpu->kvm, pdpt_gfn, pdpte, |
436 | offset * sizeof(u64), sizeof(pdpte)); | |
437 | if (ret < 0) { | |
c820c2aa RR |
438 | ret = 0; |
439 | goto out; | |
440 | } | |
c820c2aa RR |
441 | for (i = 0; i < ARRAY_SIZE(pdpte); ++i) { |
442 | if ((pdpte[i] & 1) && (pdpte[i] & 0xfffffff0000001e6ull)) { | |
1342d353 AK |
443 | ret = 0; |
444 | goto out; | |
445 | } | |
6aa8b732 | 446 | } |
c820c2aa | 447 | ret = 1; |
6aa8b732 | 448 | |
c820c2aa | 449 | memcpy(vcpu->pdptrs, pdpte, sizeof(vcpu->pdptrs)); |
1342d353 | 450 | out: |
11ec2804 | 451 | mutex_unlock(&vcpu->kvm->lock); |
6aa8b732 | 452 | |
1342d353 | 453 | return ret; |
6aa8b732 AK |
454 | } |
455 | ||
456 | void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) | |
457 | { | |
707d92fa | 458 | if (cr0 & CR0_RESERVED_BITS) { |
6aa8b732 AK |
459 | printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n", |
460 | cr0, vcpu->cr0); | |
461 | inject_gp(vcpu); | |
462 | return; | |
463 | } | |
464 | ||
707d92fa | 465 | if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) { |
6aa8b732 AK |
466 | printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n"); |
467 | inject_gp(vcpu); | |
468 | return; | |
469 | } | |
470 | ||
707d92fa | 471 | if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) { |
6aa8b732 AK |
472 | printk(KERN_DEBUG "set_cr0: #GP, set PG flag " |
473 | "and a clear PE flag\n"); | |
474 | inject_gp(vcpu); | |
475 | return; | |
476 | } | |
477 | ||
707d92fa | 478 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { |
05b3e0c2 | 479 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
480 | if ((vcpu->shadow_efer & EFER_LME)) { |
481 | int cs_db, cs_l; | |
482 | ||
483 | if (!is_pae(vcpu)) { | |
484 | printk(KERN_DEBUG "set_cr0: #GP, start paging " | |
485 | "in long mode while PAE is disabled\n"); | |
486 | inject_gp(vcpu); | |
487 | return; | |
488 | } | |
cbdd1bea | 489 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); |
6aa8b732 AK |
490 | if (cs_l) { |
491 | printk(KERN_DEBUG "set_cr0: #GP, start paging " | |
492 | "in long mode while CS.L == 1\n"); | |
493 | inject_gp(vcpu); | |
494 | return; | |
495 | ||
496 | } | |
497 | } else | |
498 | #endif | |
1342d353 | 499 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->cr3)) { |
6aa8b732 AK |
500 | printk(KERN_DEBUG "set_cr0: #GP, pdptrs " |
501 | "reserved bits\n"); | |
502 | inject_gp(vcpu); | |
503 | return; | |
504 | } | |
505 | ||
506 | } | |
507 | ||
cbdd1bea | 508 | kvm_x86_ops->set_cr0(vcpu, cr0); |
6aa8b732 AK |
509 | vcpu->cr0 = cr0; |
510 | ||
11ec2804 | 511 | mutex_lock(&vcpu->kvm->lock); |
6aa8b732 | 512 | kvm_mmu_reset_context(vcpu); |
11ec2804 | 513 | mutex_unlock(&vcpu->kvm->lock); |
6aa8b732 AK |
514 | return; |
515 | } | |
516 | EXPORT_SYMBOL_GPL(set_cr0); | |
517 | ||
518 | void lmsw(struct kvm_vcpu *vcpu, unsigned long msw) | |
519 | { | |
520 | set_cr0(vcpu, (vcpu->cr0 & ~0x0ful) | (msw & 0x0f)); | |
521 | } | |
522 | EXPORT_SYMBOL_GPL(lmsw); | |
523 | ||
524 | void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) | |
525 | { | |
66aee91a | 526 | if (cr4 & CR4_RESERVED_BITS) { |
6aa8b732 AK |
527 | printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n"); |
528 | inject_gp(vcpu); | |
529 | return; | |
530 | } | |
531 | ||
a9058ecd | 532 | if (is_long_mode(vcpu)) { |
66aee91a | 533 | if (!(cr4 & X86_CR4_PAE)) { |
6aa8b732 AK |
534 | printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while " |
535 | "in long mode\n"); | |
536 | inject_gp(vcpu); | |
537 | return; | |
538 | } | |
66aee91a | 539 | } else if (is_paging(vcpu) && !is_pae(vcpu) && (cr4 & X86_CR4_PAE) |
1342d353 | 540 | && !load_pdptrs(vcpu, vcpu->cr3)) { |
6aa8b732 AK |
541 | printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n"); |
542 | inject_gp(vcpu); | |
310bc76c | 543 | return; |
6aa8b732 AK |
544 | } |
545 | ||
66aee91a | 546 | if (cr4 & X86_CR4_VMXE) { |
6aa8b732 AK |
547 | printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n"); |
548 | inject_gp(vcpu); | |
549 | return; | |
550 | } | |
cbdd1bea | 551 | kvm_x86_ops->set_cr4(vcpu, cr4); |
81f50e3b | 552 | vcpu->cr4 = cr4; |
11ec2804 | 553 | mutex_lock(&vcpu->kvm->lock); |
6aa8b732 | 554 | kvm_mmu_reset_context(vcpu); |
11ec2804 | 555 | mutex_unlock(&vcpu->kvm->lock); |
6aa8b732 AK |
556 | } |
557 | EXPORT_SYMBOL_GPL(set_cr4); | |
558 | ||
559 | void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) | |
560 | { | |
a9058ecd | 561 | if (is_long_mode(vcpu)) { |
f802a307 | 562 | if (cr3 & CR3_L_MODE_RESERVED_BITS) { |
6aa8b732 AK |
563 | printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n"); |
564 | inject_gp(vcpu); | |
565 | return; | |
566 | } | |
567 | } else { | |
f802a307 RR |
568 | if (is_pae(vcpu)) { |
569 | if (cr3 & CR3_PAE_RESERVED_BITS) { | |
570 | printk(KERN_DEBUG | |
571 | "set_cr3: #GP, reserved bits\n"); | |
572 | inject_gp(vcpu); | |
573 | return; | |
574 | } | |
575 | if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) { | |
576 | printk(KERN_DEBUG "set_cr3: #GP, pdptrs " | |
577 | "reserved bits\n"); | |
578 | inject_gp(vcpu); | |
579 | return; | |
580 | } | |
6aa8b732 | 581 | } |
21764863 RH |
582 | /* |
583 | * We don't check reserved bits in nonpae mode, because | |
584 | * this isn't enforced, and VMware depends on this. | |
585 | */ | |
6aa8b732 AK |
586 | } |
587 | ||
11ec2804 | 588 | mutex_lock(&vcpu->kvm->lock); |
d21225ee IM |
589 | /* |
590 | * Does the new cr3 value map to physical memory? (Note, we | |
591 | * catch an invalid cr3 even in real-mode, because it would | |
592 | * cause trouble later on when we turn on paging anyway.) | |
593 | * | |
594 | * A real CPU would silently accept an invalid cr3 and would | |
595 | * attempt to use it - with largely undefined (and often hard | |
596 | * to debug) behavior on the guest side. | |
597 | */ | |
598 | if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT))) | |
599 | inject_gp(vcpu); | |
fb764416 RR |
600 | else { |
601 | vcpu->cr3 = cr3; | |
d21225ee | 602 | vcpu->mmu.new_cr3(vcpu); |
fb764416 | 603 | } |
11ec2804 | 604 | mutex_unlock(&vcpu->kvm->lock); |
6aa8b732 AK |
605 | } |
606 | EXPORT_SYMBOL_GPL(set_cr3); | |
607 | ||
608 | void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) | |
609 | { | |
7075bc81 | 610 | if (cr8 & CR8_RESERVED_BITS) { |
6aa8b732 AK |
611 | printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8); |
612 | inject_gp(vcpu); | |
613 | return; | |
614 | } | |
97222cc8 ED |
615 | if (irqchip_in_kernel(vcpu->kvm)) |
616 | kvm_lapic_set_tpr(vcpu, cr8); | |
617 | else | |
618 | vcpu->cr8 = cr8; | |
6aa8b732 AK |
619 | } |
620 | EXPORT_SYMBOL_GPL(set_cr8); | |
621 | ||
7017fc3d ED |
622 | unsigned long get_cr8(struct kvm_vcpu *vcpu) |
623 | { | |
97222cc8 ED |
624 | if (irqchip_in_kernel(vcpu->kvm)) |
625 | return kvm_lapic_get_cr8(vcpu); | |
626 | else | |
627 | return vcpu->cr8; | |
7017fc3d ED |
628 | } |
629 | EXPORT_SYMBOL_GPL(get_cr8); | |
630 | ||
631 | u64 kvm_get_apic_base(struct kvm_vcpu *vcpu) | |
632 | { | |
97222cc8 ED |
633 | if (irqchip_in_kernel(vcpu->kvm)) |
634 | return vcpu->apic_base; | |
635 | else | |
636 | return vcpu->apic_base; | |
7017fc3d ED |
637 | } |
638 | EXPORT_SYMBOL_GPL(kvm_get_apic_base); | |
639 | ||
640 | void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data) | |
641 | { | |
97222cc8 ED |
642 | /* TODO: reserve bits check */ |
643 | if (irqchip_in_kernel(vcpu->kvm)) | |
644 | kvm_lapic_set_base(vcpu, data); | |
645 | else | |
646 | vcpu->apic_base = data; | |
7017fc3d ED |
647 | } |
648 | EXPORT_SYMBOL_GPL(kvm_set_apic_base); | |
649 | ||
6aa8b732 AK |
650 | void fx_init(struct kvm_vcpu *vcpu) |
651 | { | |
b114b080 | 652 | unsigned after_mxcsr_mask; |
6aa8b732 | 653 | |
9bd01506 RR |
654 | /* Initialize guest FPU by resetting ours and saving into guest's */ |
655 | preempt_disable(); | |
b114b080 | 656 | fx_save(&vcpu->host_fx_image); |
6aa8b732 | 657 | fpu_init(); |
b114b080 RR |
658 | fx_save(&vcpu->guest_fx_image); |
659 | fx_restore(&vcpu->host_fx_image); | |
9bd01506 | 660 | preempt_enable(); |
6aa8b732 | 661 | |
380102c8 | 662 | vcpu->cr0 |= X86_CR0_ET; |
b114b080 RR |
663 | after_mxcsr_mask = offsetof(struct i387_fxsave_struct, st_space); |
664 | vcpu->guest_fx_image.mxcsr = 0x1f80; | |
665 | memset((void *)&vcpu->guest_fx_image + after_mxcsr_mask, | |
666 | 0, sizeof(struct i387_fxsave_struct) - after_mxcsr_mask); | |
6aa8b732 AK |
667 | } |
668 | EXPORT_SYMBOL_GPL(fx_init); | |
669 | ||
6aa8b732 AK |
670 | /* |
671 | * Allocate some memory and give it an address in the guest physical address | |
672 | * space. | |
673 | * | |
674 | * Discontiguous memory is allowed, mostly for framebuffers. | |
675 | */ | |
2c6f5df9 | 676 | static int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, |
6fc138d2 IE |
677 | struct |
678 | kvm_userspace_memory_region *mem, | |
679 | int user_alloc) | |
6aa8b732 AK |
680 | { |
681 | int r; | |
682 | gfn_t base_gfn; | |
683 | unsigned long npages; | |
684 | unsigned long i; | |
685 | struct kvm_memory_slot *memslot; | |
686 | struct kvm_memory_slot old, new; | |
6aa8b732 AK |
687 | |
688 | r = -EINVAL; | |
689 | /* General sanity checks */ | |
690 | if (mem->memory_size & (PAGE_SIZE - 1)) | |
691 | goto out; | |
692 | if (mem->guest_phys_addr & (PAGE_SIZE - 1)) | |
693 | goto out; | |
694 | if (mem->slot >= KVM_MEMORY_SLOTS) | |
695 | goto out; | |
696 | if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr) | |
697 | goto out; | |
698 | ||
699 | memslot = &kvm->memslots[mem->slot]; | |
700 | base_gfn = mem->guest_phys_addr >> PAGE_SHIFT; | |
701 | npages = mem->memory_size >> PAGE_SHIFT; | |
702 | ||
703 | if (!npages) | |
704 | mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES; | |
705 | ||
11ec2804 | 706 | mutex_lock(&kvm->lock); |
6aa8b732 | 707 | |
6aa8b732 AK |
708 | new = old = *memslot; |
709 | ||
710 | new.base_gfn = base_gfn; | |
711 | new.npages = npages; | |
712 | new.flags = mem->flags; | |
713 | ||
714 | /* Disallow changing a memory slot's size. */ | |
715 | r = -EINVAL; | |
716 | if (npages && old.npages && npages != old.npages) | |
717 | goto out_unlock; | |
718 | ||
719 | /* Check for overlaps */ | |
720 | r = -EEXIST; | |
721 | for (i = 0; i < KVM_MEMORY_SLOTS; ++i) { | |
722 | struct kvm_memory_slot *s = &kvm->memslots[i]; | |
723 | ||
724 | if (s == memslot) | |
725 | continue; | |
726 | if (!((base_gfn + npages <= s->base_gfn) || | |
727 | (base_gfn >= s->base_gfn + s->npages))) | |
728 | goto out_unlock; | |
729 | } | |
6aa8b732 AK |
730 | |
731 | /* Deallocate if slot is being removed */ | |
732 | if (!npages) | |
8b6d44c7 | 733 | new.phys_mem = NULL; |
6aa8b732 AK |
734 | |
735 | /* Free page dirty bitmap if unneeded */ | |
736 | if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES)) | |
8b6d44c7 | 737 | new.dirty_bitmap = NULL; |
6aa8b732 AK |
738 | |
739 | r = -ENOMEM; | |
740 | ||
741 | /* Allocate if a slot is being created */ | |
742 | if (npages && !new.phys_mem) { | |
743 | new.phys_mem = vmalloc(npages * sizeof(struct page *)); | |
744 | ||
745 | if (!new.phys_mem) | |
0d8d2bd4 | 746 | goto out_unlock; |
6aa8b732 | 747 | |
d77c26fc | 748 | new.rmap = vmalloc(npages * sizeof(struct page *)); |
290fc38d IE |
749 | |
750 | if (!new.rmap) | |
751 | goto out_unlock; | |
752 | ||
6aa8b732 | 753 | memset(new.phys_mem, 0, npages * sizeof(struct page *)); |
290fc38d | 754 | memset(new.rmap, 0, npages * sizeof(*new.rmap)); |
6fc138d2 IE |
755 | if (user_alloc) { |
756 | unsigned long pages_num; | |
757 | ||
758 | new.user_alloc = 1; | |
759 | down_read(¤t->mm->mmap_sem); | |
760 | ||
761 | pages_num = get_user_pages(current, current->mm, | |
762 | mem->userspace_addr, | |
763 | npages, 1, 1, new.phys_mem, | |
764 | NULL); | |
765 | ||
766 | up_read(¤t->mm->mmap_sem); | |
767 | if (pages_num != npages) | |
0d8d2bd4 | 768 | goto out_unlock; |
6fc138d2 IE |
769 | } else { |
770 | for (i = 0; i < npages; ++i) { | |
771 | new.phys_mem[i] = alloc_page(GFP_HIGHUSER | |
772 | | __GFP_ZERO); | |
773 | if (!new.phys_mem[i]) | |
774 | goto out_unlock; | |
775 | } | |
6aa8b732 AK |
776 | } |
777 | } | |
778 | ||
779 | /* Allocate page dirty bitmap if needed */ | |
780 | if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) { | |
781 | unsigned dirty_bytes = ALIGN(npages, BITS_PER_LONG) / 8; | |
782 | ||
783 | new.dirty_bitmap = vmalloc(dirty_bytes); | |
784 | if (!new.dirty_bitmap) | |
0d8d2bd4 | 785 | goto out_unlock; |
6aa8b732 AK |
786 | memset(new.dirty_bitmap, 0, dirty_bytes); |
787 | } | |
788 | ||
6aa8b732 AK |
789 | if (mem->slot >= kvm->nmemslots) |
790 | kvm->nmemslots = mem->slot + 1; | |
791 | ||
82ce2c96 IE |
792 | if (!kvm->n_requested_mmu_pages) { |
793 | unsigned int n_pages; | |
794 | ||
795 | if (npages) { | |
796 | n_pages = npages * KVM_PERMILLE_MMU_PAGES / 1000; | |
797 | kvm_mmu_change_mmu_pages(kvm, kvm->n_alloc_mmu_pages + | |
798 | n_pages); | |
799 | } else { | |
800 | unsigned int nr_mmu_pages; | |
801 | ||
802 | n_pages = old.npages * KVM_PERMILLE_MMU_PAGES / 1000; | |
803 | nr_mmu_pages = kvm->n_alloc_mmu_pages - n_pages; | |
804 | nr_mmu_pages = max(nr_mmu_pages, | |
805 | (unsigned int) KVM_MIN_ALLOC_MMU_PAGES); | |
806 | kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages); | |
807 | } | |
808 | } | |
809 | ||
6aa8b732 | 810 | *memslot = new; |
6aa8b732 | 811 | |
90cb0529 AK |
812 | kvm_mmu_slot_remove_write_access(kvm, mem->slot); |
813 | kvm_flush_remote_tlbs(kvm); | |
6aa8b732 | 814 | |
11ec2804 | 815 | mutex_unlock(&kvm->lock); |
6aa8b732 AK |
816 | |
817 | kvm_free_physmem_slot(&old, &new); | |
818 | return 0; | |
819 | ||
820 | out_unlock: | |
11ec2804 | 821 | mutex_unlock(&kvm->lock); |
6aa8b732 AK |
822 | kvm_free_physmem_slot(&new, &old); |
823 | out: | |
824 | return r; | |
825 | } | |
826 | ||
82ce2c96 IE |
827 | static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm, |
828 | u32 kvm_nr_mmu_pages) | |
829 | { | |
830 | if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES) | |
831 | return -EINVAL; | |
832 | ||
833 | mutex_lock(&kvm->lock); | |
834 | ||
835 | kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages); | |
836 | kvm->n_requested_mmu_pages = kvm_nr_mmu_pages; | |
837 | ||
838 | mutex_unlock(&kvm->lock); | |
839 | return 0; | |
840 | } | |
841 | ||
842 | static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm) | |
843 | { | |
844 | return kvm->n_alloc_mmu_pages; | |
845 | } | |
846 | ||
6aa8b732 AK |
847 | /* |
848 | * Get (and clear) the dirty memory log for a memory slot. | |
849 | */ | |
2c6f5df9 AK |
850 | static int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, |
851 | struct kvm_dirty_log *log) | |
6aa8b732 AK |
852 | { |
853 | struct kvm_memory_slot *memslot; | |
854 | int r, i; | |
855 | int n; | |
856 | unsigned long any = 0; | |
857 | ||
11ec2804 | 858 | mutex_lock(&kvm->lock); |
6aa8b732 | 859 | |
6aa8b732 AK |
860 | r = -EINVAL; |
861 | if (log->slot >= KVM_MEMORY_SLOTS) | |
862 | goto out; | |
863 | ||
864 | memslot = &kvm->memslots[log->slot]; | |
865 | r = -ENOENT; | |
866 | if (!memslot->dirty_bitmap) | |
867 | goto out; | |
868 | ||
cd1a4a98 | 869 | n = ALIGN(memslot->npages, BITS_PER_LONG) / 8; |
6aa8b732 | 870 | |
cd1a4a98 | 871 | for (i = 0; !any && i < n/sizeof(long); ++i) |
6aa8b732 AK |
872 | any = memslot->dirty_bitmap[i]; |
873 | ||
874 | r = -EFAULT; | |
875 | if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n)) | |
876 | goto out; | |
877 | ||
39214915 RR |
878 | /* If nothing is dirty, don't bother messing with page tables. */ |
879 | if (any) { | |
39214915 RR |
880 | kvm_mmu_slot_remove_write_access(kvm, log->slot); |
881 | kvm_flush_remote_tlbs(kvm); | |
882 | memset(memslot->dirty_bitmap, 0, n); | |
39214915 | 883 | } |
6aa8b732 AK |
884 | |
885 | r = 0; | |
886 | ||
887 | out: | |
11ec2804 | 888 | mutex_unlock(&kvm->lock); |
6aa8b732 AK |
889 | return r; |
890 | } | |
891 | ||
e8207547 AK |
892 | /* |
893 | * Set a new alias region. Aliases map a portion of physical memory into | |
894 | * another portion. This is useful for memory windows, for example the PC | |
895 | * VGA region. | |
896 | */ | |
897 | static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm, | |
898 | struct kvm_memory_alias *alias) | |
899 | { | |
900 | int r, n; | |
901 | struct kvm_mem_alias *p; | |
902 | ||
903 | r = -EINVAL; | |
904 | /* General sanity checks */ | |
905 | if (alias->memory_size & (PAGE_SIZE - 1)) | |
906 | goto out; | |
907 | if (alias->guest_phys_addr & (PAGE_SIZE - 1)) | |
908 | goto out; | |
909 | if (alias->slot >= KVM_ALIAS_SLOTS) | |
910 | goto out; | |
911 | if (alias->guest_phys_addr + alias->memory_size | |
912 | < alias->guest_phys_addr) | |
913 | goto out; | |
914 | if (alias->target_phys_addr + alias->memory_size | |
915 | < alias->target_phys_addr) | |
916 | goto out; | |
917 | ||
11ec2804 | 918 | mutex_lock(&kvm->lock); |
e8207547 AK |
919 | |
920 | p = &kvm->aliases[alias->slot]; | |
921 | p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT; | |
922 | p->npages = alias->memory_size >> PAGE_SHIFT; | |
923 | p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT; | |
924 | ||
925 | for (n = KVM_ALIAS_SLOTS; n > 0; --n) | |
926 | if (kvm->aliases[n - 1].npages) | |
927 | break; | |
928 | kvm->naliases = n; | |
929 | ||
90cb0529 | 930 | kvm_mmu_zap_all(kvm); |
e8207547 | 931 | |
11ec2804 | 932 | mutex_unlock(&kvm->lock); |
e8207547 AK |
933 | |
934 | return 0; | |
935 | ||
936 | out: | |
937 | return r; | |
938 | } | |
939 | ||
6ceb9d79 HQ |
940 | static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) |
941 | { | |
942 | int r; | |
943 | ||
944 | r = 0; | |
945 | switch (chip->chip_id) { | |
946 | case KVM_IRQCHIP_PIC_MASTER: | |
d77c26fc | 947 | memcpy(&chip->chip.pic, |
6ceb9d79 HQ |
948 | &pic_irqchip(kvm)->pics[0], |
949 | sizeof(struct kvm_pic_state)); | |
950 | break; | |
951 | case KVM_IRQCHIP_PIC_SLAVE: | |
d77c26fc | 952 | memcpy(&chip->chip.pic, |
6ceb9d79 HQ |
953 | &pic_irqchip(kvm)->pics[1], |
954 | sizeof(struct kvm_pic_state)); | |
955 | break; | |
6bf9e962 | 956 | case KVM_IRQCHIP_IOAPIC: |
d77c26fc | 957 | memcpy(&chip->chip.ioapic, |
6bf9e962 HQ |
958 | ioapic_irqchip(kvm), |
959 | sizeof(struct kvm_ioapic_state)); | |
960 | break; | |
6ceb9d79 HQ |
961 | default: |
962 | r = -EINVAL; | |
963 | break; | |
964 | } | |
965 | return r; | |
966 | } | |
967 | ||
968 | static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
969 | { | |
970 | int r; | |
971 | ||
972 | r = 0; | |
973 | switch (chip->chip_id) { | |
974 | case KVM_IRQCHIP_PIC_MASTER: | |
d77c26fc | 975 | memcpy(&pic_irqchip(kvm)->pics[0], |
6ceb9d79 HQ |
976 | &chip->chip.pic, |
977 | sizeof(struct kvm_pic_state)); | |
978 | break; | |
979 | case KVM_IRQCHIP_PIC_SLAVE: | |
d77c26fc | 980 | memcpy(&pic_irqchip(kvm)->pics[1], |
6ceb9d79 HQ |
981 | &chip->chip.pic, |
982 | sizeof(struct kvm_pic_state)); | |
983 | break; | |
6bf9e962 | 984 | case KVM_IRQCHIP_IOAPIC: |
d77c26fc | 985 | memcpy(ioapic_irqchip(kvm), |
6bf9e962 HQ |
986 | &chip->chip.ioapic, |
987 | sizeof(struct kvm_ioapic_state)); | |
988 | break; | |
6ceb9d79 HQ |
989 | default: |
990 | r = -EINVAL; | |
991 | break; | |
992 | } | |
993 | kvm_pic_update_irq(pic_irqchip(kvm)); | |
994 | return r; | |
995 | } | |
996 | ||
290fc38d | 997 | gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) |
e8207547 AK |
998 | { |
999 | int i; | |
1000 | struct kvm_mem_alias *alias; | |
1001 | ||
1002 | for (i = 0; i < kvm->naliases; ++i) { | |
1003 | alias = &kvm->aliases[i]; | |
1004 | if (gfn >= alias->base_gfn | |
1005 | && gfn < alias->base_gfn + alias->npages) | |
1006 | return alias->target_gfn + gfn - alias->base_gfn; | |
1007 | } | |
1008 | return gfn; | |
1009 | } | |
1010 | ||
1011 | static struct kvm_memory_slot *__gfn_to_memslot(struct kvm *kvm, gfn_t gfn) | |
6aa8b732 AK |
1012 | { |
1013 | int i; | |
1014 | ||
1015 | for (i = 0; i < kvm->nmemslots; ++i) { | |
1016 | struct kvm_memory_slot *memslot = &kvm->memslots[i]; | |
1017 | ||
1018 | if (gfn >= memslot->base_gfn | |
1019 | && gfn < memslot->base_gfn + memslot->npages) | |
1020 | return memslot; | |
1021 | } | |
8b6d44c7 | 1022 | return NULL; |
6aa8b732 | 1023 | } |
e8207547 AK |
1024 | |
1025 | struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn) | |
1026 | { | |
1027 | gfn = unalias_gfn(kvm, gfn); | |
1028 | return __gfn_to_memslot(kvm, gfn); | |
1029 | } | |
6aa8b732 | 1030 | |
954bbbc2 AK |
1031 | struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn) |
1032 | { | |
1033 | struct kvm_memory_slot *slot; | |
1034 | ||
e8207547 AK |
1035 | gfn = unalias_gfn(kvm, gfn); |
1036 | slot = __gfn_to_memslot(kvm, gfn); | |
954bbbc2 AK |
1037 | if (!slot) |
1038 | return NULL; | |
1039 | return slot->phys_mem[gfn - slot->base_gfn]; | |
1040 | } | |
1041 | EXPORT_SYMBOL_GPL(gfn_to_page); | |
1042 | ||
195aefde IE |
1043 | static int next_segment(unsigned long len, int offset) |
1044 | { | |
1045 | if (len > PAGE_SIZE - offset) | |
1046 | return PAGE_SIZE - offset; | |
1047 | else | |
1048 | return len; | |
1049 | } | |
1050 | ||
1051 | int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, | |
1052 | int len) | |
1053 | { | |
1054 | void *page_virt; | |
1055 | struct page *page; | |
1056 | ||
1057 | page = gfn_to_page(kvm, gfn); | |
1058 | if (!page) | |
1059 | return -EFAULT; | |
1060 | page_virt = kmap_atomic(page, KM_USER0); | |
1061 | ||
1062 | memcpy(data, page_virt + offset, len); | |
1063 | ||
1064 | kunmap_atomic(page_virt, KM_USER0); | |
1065 | return 0; | |
1066 | } | |
1067 | EXPORT_SYMBOL_GPL(kvm_read_guest_page); | |
1068 | ||
1069 | int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len) | |
1070 | { | |
1071 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
1072 | int seg; | |
1073 | int offset = offset_in_page(gpa); | |
1074 | int ret; | |
1075 | ||
1076 | while ((seg = next_segment(len, offset)) != 0) { | |
1077 | ret = kvm_read_guest_page(kvm, gfn, data, offset, seg); | |
1078 | if (ret < 0) | |
1079 | return ret; | |
1080 | offset = 0; | |
1081 | len -= seg; | |
1082 | data += seg; | |
1083 | ++gfn; | |
1084 | } | |
1085 | return 0; | |
1086 | } | |
1087 | EXPORT_SYMBOL_GPL(kvm_read_guest); | |
1088 | ||
1089 | int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, | |
1090 | int offset, int len) | |
1091 | { | |
1092 | void *page_virt; | |
1093 | struct page *page; | |
1094 | ||
1095 | page = gfn_to_page(kvm, gfn); | |
1096 | if (!page) | |
1097 | return -EFAULT; | |
1098 | page_virt = kmap_atomic(page, KM_USER0); | |
1099 | ||
1100 | memcpy(page_virt + offset, data, len); | |
1101 | ||
1102 | kunmap_atomic(page_virt, KM_USER0); | |
1103 | mark_page_dirty(kvm, gfn); | |
1104 | return 0; | |
1105 | } | |
1106 | EXPORT_SYMBOL_GPL(kvm_write_guest_page); | |
1107 | ||
1108 | int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, | |
1109 | unsigned long len) | |
1110 | { | |
1111 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
1112 | int seg; | |
1113 | int offset = offset_in_page(gpa); | |
1114 | int ret; | |
1115 | ||
1116 | while ((seg = next_segment(len, offset)) != 0) { | |
1117 | ret = kvm_write_guest_page(kvm, gfn, data, offset, seg); | |
1118 | if (ret < 0) | |
1119 | return ret; | |
1120 | offset = 0; | |
1121 | len -= seg; | |
1122 | data += seg; | |
1123 | ++gfn; | |
1124 | } | |
1125 | return 0; | |
1126 | } | |
1127 | ||
1128 | int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len) | |
1129 | { | |
1130 | void *page_virt; | |
1131 | struct page *page; | |
1132 | ||
1133 | page = gfn_to_page(kvm, gfn); | |
1134 | if (!page) | |
1135 | return -EFAULT; | |
1136 | page_virt = kmap_atomic(page, KM_USER0); | |
1137 | ||
1138 | memset(page_virt + offset, 0, len); | |
1139 | ||
1140 | kunmap_atomic(page_virt, KM_USER0); | |
1141 | return 0; | |
1142 | } | |
1143 | EXPORT_SYMBOL_GPL(kvm_clear_guest_page); | |
1144 | ||
1145 | int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len) | |
1146 | { | |
1147 | gfn_t gfn = gpa >> PAGE_SHIFT; | |
1148 | int seg; | |
1149 | int offset = offset_in_page(gpa); | |
1150 | int ret; | |
1151 | ||
1152 | while ((seg = next_segment(len, offset)) != 0) { | |
1153 | ret = kvm_clear_guest_page(kvm, gfn, offset, seg); | |
1154 | if (ret < 0) | |
1155 | return ret; | |
1156 | offset = 0; | |
1157 | len -= seg; | |
1158 | ++gfn; | |
1159 | } | |
1160 | return 0; | |
1161 | } | |
1162 | EXPORT_SYMBOL_GPL(kvm_clear_guest); | |
1163 | ||
7e9d619d | 1164 | /* WARNING: Does not work on aliased pages. */ |
6aa8b732 AK |
1165 | void mark_page_dirty(struct kvm *kvm, gfn_t gfn) |
1166 | { | |
31389947 | 1167 | struct kvm_memory_slot *memslot; |
6aa8b732 | 1168 | |
7e9d619d RR |
1169 | memslot = __gfn_to_memslot(kvm, gfn); |
1170 | if (memslot && memslot->dirty_bitmap) { | |
1171 | unsigned long rel_gfn = gfn - memslot->base_gfn; | |
6aa8b732 | 1172 | |
7e9d619d RR |
1173 | /* avoid RMW */ |
1174 | if (!test_bit(rel_gfn, memslot->dirty_bitmap)) | |
1175 | set_bit(rel_gfn, memslot->dirty_bitmap); | |
6aa8b732 AK |
1176 | } |
1177 | } | |
1178 | ||
e7d5d76c | 1179 | int emulator_read_std(unsigned long addr, |
4c690a1e | 1180 | void *val, |
6aa8b732 | 1181 | unsigned int bytes, |
cebff02b | 1182 | struct kvm_vcpu *vcpu) |
6aa8b732 | 1183 | { |
6aa8b732 AK |
1184 | void *data = val; |
1185 | ||
1186 | while (bytes) { | |
1187 | gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr); | |
1188 | unsigned offset = addr & (PAGE_SIZE-1); | |
1189 | unsigned tocopy = min(bytes, (unsigned)PAGE_SIZE - offset); | |
195aefde | 1190 | int ret; |
6aa8b732 AK |
1191 | |
1192 | if (gpa == UNMAPPED_GVA) | |
1193 | return X86EMUL_PROPAGATE_FAULT; | |
195aefde IE |
1194 | ret = kvm_read_guest(vcpu->kvm, gpa, data, tocopy); |
1195 | if (ret < 0) | |
6aa8b732 | 1196 | return X86EMUL_UNHANDLEABLE; |
6aa8b732 AK |
1197 | |
1198 | bytes -= tocopy; | |
1199 | data += tocopy; | |
1200 | addr += tocopy; | |
1201 | } | |
1202 | ||
1203 | return X86EMUL_CONTINUE; | |
1204 | } | |
e7d5d76c | 1205 | EXPORT_SYMBOL_GPL(emulator_read_std); |
6aa8b732 AK |
1206 | |
1207 | static int emulator_write_std(unsigned long addr, | |
4c690a1e | 1208 | const void *val, |
6aa8b732 | 1209 | unsigned int bytes, |
cebff02b | 1210 | struct kvm_vcpu *vcpu) |
6aa8b732 | 1211 | { |
f0242478 | 1212 | pr_unimpl(vcpu, "emulator_write_std: addr %lx n %d\n", addr, bytes); |
6aa8b732 AK |
1213 | return X86EMUL_UNHANDLEABLE; |
1214 | } | |
1215 | ||
97222cc8 ED |
1216 | /* |
1217 | * Only apic need an MMIO device hook, so shortcut now.. | |
1218 | */ | |
1219 | static struct kvm_io_device *vcpu_find_pervcpu_dev(struct kvm_vcpu *vcpu, | |
1220 | gpa_t addr) | |
1221 | { | |
1222 | struct kvm_io_device *dev; | |
1223 | ||
1224 | if (vcpu->apic) { | |
1225 | dev = &vcpu->apic->dev; | |
1226 | if (dev->in_range(dev, addr)) | |
1227 | return dev; | |
1228 | } | |
1229 | return NULL; | |
1230 | } | |
1231 | ||
2eeb2e94 GH |
1232 | static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu, |
1233 | gpa_t addr) | |
1234 | { | |
97222cc8 ED |
1235 | struct kvm_io_device *dev; |
1236 | ||
1237 | dev = vcpu_find_pervcpu_dev(vcpu, addr); | |
1238 | if (dev == NULL) | |
1239 | dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr); | |
1240 | return dev; | |
2eeb2e94 GH |
1241 | } |
1242 | ||
74906345 ED |
1243 | static struct kvm_io_device *vcpu_find_pio_dev(struct kvm_vcpu *vcpu, |
1244 | gpa_t addr) | |
1245 | { | |
1246 | return kvm_io_bus_find_dev(&vcpu->kvm->pio_bus, addr); | |
1247 | } | |
1248 | ||
6aa8b732 | 1249 | static int emulator_read_emulated(unsigned long addr, |
4c690a1e | 1250 | void *val, |
6aa8b732 | 1251 | unsigned int bytes, |
cebff02b | 1252 | struct kvm_vcpu *vcpu) |
6aa8b732 | 1253 | { |
2eeb2e94 GH |
1254 | struct kvm_io_device *mmio_dev; |
1255 | gpa_t gpa; | |
6aa8b732 AK |
1256 | |
1257 | if (vcpu->mmio_read_completed) { | |
1258 | memcpy(val, vcpu->mmio_data, bytes); | |
1259 | vcpu->mmio_read_completed = 0; | |
1260 | return X86EMUL_CONTINUE; | |
cebff02b | 1261 | } else if (emulator_read_std(addr, val, bytes, vcpu) |
6aa8b732 AK |
1262 | == X86EMUL_CONTINUE) |
1263 | return X86EMUL_CONTINUE; | |
d27d4aca | 1264 | |
2eeb2e94 GH |
1265 | gpa = vcpu->mmu.gva_to_gpa(vcpu, addr); |
1266 | if (gpa == UNMAPPED_GVA) | |
1267 | return X86EMUL_PROPAGATE_FAULT; | |
6aa8b732 | 1268 | |
2eeb2e94 GH |
1269 | /* |
1270 | * Is this MMIO handled locally? | |
1271 | */ | |
1272 | mmio_dev = vcpu_find_mmio_dev(vcpu, gpa); | |
1273 | if (mmio_dev) { | |
1274 | kvm_iodevice_read(mmio_dev, gpa, bytes, val); | |
1275 | return X86EMUL_CONTINUE; | |
6aa8b732 | 1276 | } |
2eeb2e94 GH |
1277 | |
1278 | vcpu->mmio_needed = 1; | |
1279 | vcpu->mmio_phys_addr = gpa; | |
1280 | vcpu->mmio_size = bytes; | |
1281 | vcpu->mmio_is_write = 0; | |
1282 | ||
1283 | return X86EMUL_UNHANDLEABLE; | |
6aa8b732 AK |
1284 | } |
1285 | ||
da4a00f0 | 1286 | static int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
4c690a1e | 1287 | const void *val, int bytes) |
da4a00f0 | 1288 | { |
195aefde | 1289 | int ret; |
da4a00f0 | 1290 | |
195aefde IE |
1291 | ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes); |
1292 | if (ret < 0) | |
da4a00f0 | 1293 | return 0; |
fe551881 | 1294 | kvm_mmu_pte_write(vcpu, gpa, val, bytes); |
da4a00f0 AK |
1295 | return 1; |
1296 | } | |
1297 | ||
b0fcd903 AK |
1298 | static int emulator_write_emulated_onepage(unsigned long addr, |
1299 | const void *val, | |
1300 | unsigned int bytes, | |
cebff02b | 1301 | struct kvm_vcpu *vcpu) |
6aa8b732 | 1302 | { |
2eeb2e94 GH |
1303 | struct kvm_io_device *mmio_dev; |
1304 | gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr); | |
6aa8b732 | 1305 | |
c9047f53 | 1306 | if (gpa == UNMAPPED_GVA) { |
cbdd1bea | 1307 | kvm_x86_ops->inject_page_fault(vcpu, addr, 2); |
6aa8b732 | 1308 | return X86EMUL_PROPAGATE_FAULT; |
c9047f53 | 1309 | } |
6aa8b732 | 1310 | |
da4a00f0 AK |
1311 | if (emulator_write_phys(vcpu, gpa, val, bytes)) |
1312 | return X86EMUL_CONTINUE; | |
1313 | ||
2eeb2e94 GH |
1314 | /* |
1315 | * Is this MMIO handled locally? | |
1316 | */ | |
1317 | mmio_dev = vcpu_find_mmio_dev(vcpu, gpa); | |
1318 | if (mmio_dev) { | |
1319 | kvm_iodevice_write(mmio_dev, gpa, bytes, val); | |
1320 | return X86EMUL_CONTINUE; | |
1321 | } | |
1322 | ||
6aa8b732 AK |
1323 | vcpu->mmio_needed = 1; |
1324 | vcpu->mmio_phys_addr = gpa; | |
1325 | vcpu->mmio_size = bytes; | |
1326 | vcpu->mmio_is_write = 1; | |
4c690a1e | 1327 | memcpy(vcpu->mmio_data, val, bytes); |
6aa8b732 AK |
1328 | |
1329 | return X86EMUL_CONTINUE; | |
1330 | } | |
1331 | ||
e7d5d76c | 1332 | int emulator_write_emulated(unsigned long addr, |
b0fcd903 AK |
1333 | const void *val, |
1334 | unsigned int bytes, | |
cebff02b | 1335 | struct kvm_vcpu *vcpu) |
b0fcd903 AK |
1336 | { |
1337 | /* Crossing a page boundary? */ | |
1338 | if (((addr + bytes - 1) ^ addr) & PAGE_MASK) { | |
1339 | int rc, now; | |
1340 | ||
1341 | now = -addr & ~PAGE_MASK; | |
cebff02b | 1342 | rc = emulator_write_emulated_onepage(addr, val, now, vcpu); |
b0fcd903 AK |
1343 | if (rc != X86EMUL_CONTINUE) |
1344 | return rc; | |
1345 | addr += now; | |
1346 | val += now; | |
1347 | bytes -= now; | |
1348 | } | |
cebff02b | 1349 | return emulator_write_emulated_onepage(addr, val, bytes, vcpu); |
b0fcd903 | 1350 | } |
e7d5d76c | 1351 | EXPORT_SYMBOL_GPL(emulator_write_emulated); |
b0fcd903 | 1352 | |
6aa8b732 | 1353 | static int emulator_cmpxchg_emulated(unsigned long addr, |
4c690a1e AK |
1354 | const void *old, |
1355 | const void *new, | |
6aa8b732 | 1356 | unsigned int bytes, |
cebff02b | 1357 | struct kvm_vcpu *vcpu) |
6aa8b732 AK |
1358 | { |
1359 | static int reported; | |
1360 | ||
1361 | if (!reported) { | |
1362 | reported = 1; | |
1363 | printk(KERN_WARNING "kvm: emulating exchange as write\n"); | |
1364 | } | |
cebff02b | 1365 | return emulator_write_emulated(addr, new, bytes, vcpu); |
6aa8b732 AK |
1366 | } |
1367 | ||
1368 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) | |
1369 | { | |
cbdd1bea | 1370 | return kvm_x86_ops->get_segment_base(vcpu, seg); |
6aa8b732 AK |
1371 | } |
1372 | ||
1373 | int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address) | |
1374 | { | |
6aa8b732 AK |
1375 | return X86EMUL_CONTINUE; |
1376 | } | |
1377 | ||
1378 | int emulate_clts(struct kvm_vcpu *vcpu) | |
1379 | { | |
404fb881 | 1380 | kvm_x86_ops->set_cr0(vcpu, vcpu->cr0 & ~X86_CR0_TS); |
6aa8b732 AK |
1381 | return X86EMUL_CONTINUE; |
1382 | } | |
1383 | ||
d77c26fc | 1384 | int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest) |
6aa8b732 AK |
1385 | { |
1386 | struct kvm_vcpu *vcpu = ctxt->vcpu; | |
1387 | ||
1388 | switch (dr) { | |
1389 | case 0 ... 3: | |
cbdd1bea | 1390 | *dest = kvm_x86_ops->get_dr(vcpu, dr); |
6aa8b732 AK |
1391 | return X86EMUL_CONTINUE; |
1392 | default: | |
f0242478 | 1393 | pr_unimpl(vcpu, "%s: unexpected dr %u\n", __FUNCTION__, dr); |
6aa8b732 AK |
1394 | return X86EMUL_UNHANDLEABLE; |
1395 | } | |
1396 | } | |
1397 | ||
1398 | int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value) | |
1399 | { | |
1400 | unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U; | |
1401 | int exception; | |
1402 | ||
cbdd1bea | 1403 | kvm_x86_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception); |
6aa8b732 AK |
1404 | if (exception) { |
1405 | /* FIXME: better handling */ | |
1406 | return X86EMUL_UNHANDLEABLE; | |
1407 | } | |
1408 | return X86EMUL_CONTINUE; | |
1409 | } | |
1410 | ||
054b1369 | 1411 | void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context) |
6aa8b732 AK |
1412 | { |
1413 | static int reported; | |
1414 | u8 opcodes[4]; | |
054b1369 | 1415 | unsigned long rip = vcpu->rip; |
6aa8b732 AK |
1416 | unsigned long rip_linear; |
1417 | ||
054b1369 | 1418 | rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS); |
6aa8b732 AK |
1419 | |
1420 | if (reported) | |
1421 | return; | |
1422 | ||
054b1369 | 1423 | emulator_read_std(rip_linear, (void *)opcodes, 4, vcpu); |
6aa8b732 | 1424 | |
054b1369 AK |
1425 | printk(KERN_ERR "emulation failed (%s) rip %lx %02x %02x %02x %02x\n", |
1426 | context, rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]); | |
6aa8b732 AK |
1427 | reported = 1; |
1428 | } | |
054b1369 | 1429 | EXPORT_SYMBOL_GPL(kvm_report_emulation_failure); |
6aa8b732 AK |
1430 | |
1431 | struct x86_emulate_ops emulate_ops = { | |
1432 | .read_std = emulator_read_std, | |
1433 | .write_std = emulator_write_std, | |
1434 | .read_emulated = emulator_read_emulated, | |
1435 | .write_emulated = emulator_write_emulated, | |
1436 | .cmpxchg_emulated = emulator_cmpxchg_emulated, | |
1437 | }; | |
1438 | ||
1439 | int emulate_instruction(struct kvm_vcpu *vcpu, | |
1440 | struct kvm_run *run, | |
1441 | unsigned long cr2, | |
3427318f LV |
1442 | u16 error_code, |
1443 | int no_decode) | |
6aa8b732 | 1444 | { |
a22436b7 | 1445 | int r; |
6aa8b732 | 1446 | |
e7df56e4 | 1447 | vcpu->mmio_fault_cr2 = cr2; |
cbdd1bea | 1448 | kvm_x86_ops->cache_regs(vcpu); |
6aa8b732 | 1449 | |
6aa8b732 | 1450 | vcpu->mmio_is_write = 0; |
e70669ab | 1451 | vcpu->pio.string = 0; |
3427318f LV |
1452 | |
1453 | if (!no_decode) { | |
1454 | int cs_db, cs_l; | |
1455 | kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
1456 | ||
1457 | vcpu->emulate_ctxt.vcpu = vcpu; | |
1458 | vcpu->emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu); | |
1459 | vcpu->emulate_ctxt.cr2 = cr2; | |
1460 | vcpu->emulate_ctxt.mode = | |
1461 | (vcpu->emulate_ctxt.eflags & X86_EFLAGS_VM) | |
1462 | ? X86EMUL_MODE_REAL : cs_l | |
1463 | ? X86EMUL_MODE_PROT64 : cs_db | |
1464 | ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16; | |
1465 | ||
1466 | if (vcpu->emulate_ctxt.mode == X86EMUL_MODE_PROT64) { | |
1467 | vcpu->emulate_ctxt.cs_base = 0; | |
1468 | vcpu->emulate_ctxt.ds_base = 0; | |
1469 | vcpu->emulate_ctxt.es_base = 0; | |
1470 | vcpu->emulate_ctxt.ss_base = 0; | |
1471 | } else { | |
1472 | vcpu->emulate_ctxt.cs_base = | |
1473 | get_segment_base(vcpu, VCPU_SREG_CS); | |
1474 | vcpu->emulate_ctxt.ds_base = | |
1475 | get_segment_base(vcpu, VCPU_SREG_DS); | |
1476 | vcpu->emulate_ctxt.es_base = | |
1477 | get_segment_base(vcpu, VCPU_SREG_ES); | |
1478 | vcpu->emulate_ctxt.ss_base = | |
1479 | get_segment_base(vcpu, VCPU_SREG_SS); | |
1480 | } | |
1481 | ||
1482 | vcpu->emulate_ctxt.gs_base = | |
1483 | get_segment_base(vcpu, VCPU_SREG_GS); | |
1484 | vcpu->emulate_ctxt.fs_base = | |
1485 | get_segment_base(vcpu, VCPU_SREG_FS); | |
1486 | ||
1487 | r = x86_decode_insn(&vcpu->emulate_ctxt, &emulate_ops); | |
a22436b7 LV |
1488 | if (r) { |
1489 | if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) | |
1490 | return EMULATE_DONE; | |
1491 | return EMULATE_FAIL; | |
1492 | } | |
3427318f LV |
1493 | } |
1494 | ||
a22436b7 | 1495 | r = x86_emulate_insn(&vcpu->emulate_ctxt, &emulate_ops); |
1be3aa47 | 1496 | |
e70669ab LV |
1497 | if (vcpu->pio.string) |
1498 | return EMULATE_DO_MMIO; | |
6aa8b732 AK |
1499 | |
1500 | if ((r || vcpu->mmio_is_write) && run) { | |
8fc0d085 | 1501 | run->exit_reason = KVM_EXIT_MMIO; |
6aa8b732 AK |
1502 | run->mmio.phys_addr = vcpu->mmio_phys_addr; |
1503 | memcpy(run->mmio.data, vcpu->mmio_data, 8); | |
1504 | run->mmio.len = vcpu->mmio_size; | |
1505 | run->mmio.is_write = vcpu->mmio_is_write; | |
1506 | } | |
1507 | ||
1508 | if (r) { | |
a436036b AK |
1509 | if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) |
1510 | return EMULATE_DONE; | |
6aa8b732 | 1511 | if (!vcpu->mmio_needed) { |
054b1369 | 1512 | kvm_report_emulation_failure(vcpu, "mmio"); |
6aa8b732 AK |
1513 | return EMULATE_FAIL; |
1514 | } | |
1515 | return EMULATE_DO_MMIO; | |
1516 | } | |
1517 | ||
cbdd1bea | 1518 | kvm_x86_ops->decache_regs(vcpu); |
3427318f | 1519 | kvm_x86_ops->set_rflags(vcpu, vcpu->emulate_ctxt.eflags); |
6aa8b732 | 1520 | |
02c83209 AK |
1521 | if (vcpu->mmio_is_write) { |
1522 | vcpu->mmio_needed = 0; | |
6aa8b732 | 1523 | return EMULATE_DO_MMIO; |
02c83209 | 1524 | } |
6aa8b732 AK |
1525 | |
1526 | return EMULATE_DONE; | |
1527 | } | |
1528 | EXPORT_SYMBOL_GPL(emulate_instruction); | |
1529 | ||
b6958ce4 ED |
1530 | /* |
1531 | * The vCPU has executed a HLT instruction with in-kernel mode enabled. | |
1532 | */ | |
c5ec1534 | 1533 | static void kvm_vcpu_block(struct kvm_vcpu *vcpu) |
d3bef15f | 1534 | { |
b6958ce4 ED |
1535 | DECLARE_WAITQUEUE(wait, current); |
1536 | ||
1537 | add_wait_queue(&vcpu->wq, &wait); | |
1538 | ||
1539 | /* | |
1540 | * We will block until either an interrupt or a signal wakes us up | |
1541 | */ | |
c5ec1534 HQ |
1542 | while (!kvm_cpu_has_interrupt(vcpu) |
1543 | && !signal_pending(current) | |
1544 | && vcpu->mp_state != VCPU_MP_STATE_RUNNABLE | |
1545 | && vcpu->mp_state != VCPU_MP_STATE_SIPI_RECEIVED) { | |
b6958ce4 ED |
1546 | set_current_state(TASK_INTERRUPTIBLE); |
1547 | vcpu_put(vcpu); | |
1548 | schedule(); | |
1549 | vcpu_load(vcpu); | |
1550 | } | |
d3bef15f | 1551 | |
c5ec1534 | 1552 | __set_current_state(TASK_RUNNING); |
b6958ce4 | 1553 | remove_wait_queue(&vcpu->wq, &wait); |
b6958ce4 ED |
1554 | } |
1555 | ||
1556 | int kvm_emulate_halt(struct kvm_vcpu *vcpu) | |
1557 | { | |
d3bef15f | 1558 | ++vcpu->stat.halt_exits; |
b6958ce4 | 1559 | if (irqchip_in_kernel(vcpu->kvm)) { |
c5ec1534 HQ |
1560 | vcpu->mp_state = VCPU_MP_STATE_HALTED; |
1561 | kvm_vcpu_block(vcpu); | |
1562 | if (vcpu->mp_state != VCPU_MP_STATE_RUNNABLE) | |
1563 | return -EINTR; | |
b6958ce4 ED |
1564 | return 1; |
1565 | } else { | |
1566 | vcpu->run->exit_reason = KVM_EXIT_HLT; | |
1567 | return 0; | |
1568 | } | |
d3bef15f AK |
1569 | } |
1570 | EXPORT_SYMBOL_GPL(kvm_emulate_halt); | |
1571 | ||
7aa81cc0 | 1572 | int kvm_emulate_hypercall(struct kvm_vcpu *vcpu) |
270fd9b9 | 1573 | { |
7aa81cc0 | 1574 | unsigned long nr, a0, a1, a2, a3, ret; |
270fd9b9 | 1575 | |
cbdd1bea | 1576 | kvm_x86_ops->cache_regs(vcpu); |
7aa81cc0 AL |
1577 | |
1578 | nr = vcpu->regs[VCPU_REGS_RAX]; | |
1579 | a0 = vcpu->regs[VCPU_REGS_RBX]; | |
1580 | a1 = vcpu->regs[VCPU_REGS_RCX]; | |
1581 | a2 = vcpu->regs[VCPU_REGS_RDX]; | |
1582 | a3 = vcpu->regs[VCPU_REGS_RSI]; | |
1583 | ||
1584 | if (!is_long_mode(vcpu)) { | |
1585 | nr &= 0xFFFFFFFF; | |
1586 | a0 &= 0xFFFFFFFF; | |
1587 | a1 &= 0xFFFFFFFF; | |
1588 | a2 &= 0xFFFFFFFF; | |
1589 | a3 &= 0xFFFFFFFF; | |
270fd9b9 | 1590 | } |
7aa81cc0 | 1591 | |
270fd9b9 AK |
1592 | switch (nr) { |
1593 | default: | |
7aa81cc0 AL |
1594 | ret = -KVM_ENOSYS; |
1595 | break; | |
270fd9b9 AK |
1596 | } |
1597 | vcpu->regs[VCPU_REGS_RAX] = ret; | |
cbdd1bea | 1598 | kvm_x86_ops->decache_regs(vcpu); |
7aa81cc0 AL |
1599 | return 0; |
1600 | } | |
1601 | EXPORT_SYMBOL_GPL(kvm_emulate_hypercall); | |
1602 | ||
1603 | int kvm_fix_hypercall(struct kvm_vcpu *vcpu) | |
1604 | { | |
1605 | char instruction[3]; | |
1606 | int ret = 0; | |
1607 | ||
1608 | mutex_lock(&vcpu->kvm->lock); | |
1609 | ||
1610 | /* | |
1611 | * Blow out the MMU to ensure that no other VCPU has an active mapping | |
1612 | * to ensure that the updated hypercall appears atomically across all | |
1613 | * VCPUs. | |
1614 | */ | |
1615 | kvm_mmu_zap_all(vcpu->kvm); | |
1616 | ||
1617 | kvm_x86_ops->cache_regs(vcpu); | |
1618 | kvm_x86_ops->patch_hypercall(vcpu, instruction); | |
1619 | if (emulator_write_emulated(vcpu->rip, instruction, 3, vcpu) | |
1620 | != X86EMUL_CONTINUE) | |
1621 | ret = -EFAULT; | |
1622 | ||
1623 | mutex_unlock(&vcpu->kvm->lock); | |
1624 | ||
1625 | return ret; | |
270fd9b9 | 1626 | } |
270fd9b9 | 1627 | |
6aa8b732 AK |
1628 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) |
1629 | { | |
1630 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; | |
1631 | } | |
1632 | ||
1633 | void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
1634 | { | |
1635 | struct descriptor_table dt = { limit, base }; | |
1636 | ||
cbdd1bea | 1637 | kvm_x86_ops->set_gdt(vcpu, &dt); |
6aa8b732 AK |
1638 | } |
1639 | ||
1640 | void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
1641 | { | |
1642 | struct descriptor_table dt = { limit, base }; | |
1643 | ||
cbdd1bea | 1644 | kvm_x86_ops->set_idt(vcpu, &dt); |
6aa8b732 AK |
1645 | } |
1646 | ||
1647 | void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw, | |
1648 | unsigned long *rflags) | |
1649 | { | |
1650 | lmsw(vcpu, msw); | |
cbdd1bea | 1651 | *rflags = kvm_x86_ops->get_rflags(vcpu); |
6aa8b732 AK |
1652 | } |
1653 | ||
1654 | unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr) | |
1655 | { | |
cbdd1bea | 1656 | kvm_x86_ops->decache_cr4_guest_bits(vcpu); |
6aa8b732 AK |
1657 | switch (cr) { |
1658 | case 0: | |
1659 | return vcpu->cr0; | |
1660 | case 2: | |
1661 | return vcpu->cr2; | |
1662 | case 3: | |
1663 | return vcpu->cr3; | |
1664 | case 4: | |
1665 | return vcpu->cr4; | |
1666 | default: | |
1667 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr); | |
1668 | return 0; | |
1669 | } | |
1670 | } | |
1671 | ||
1672 | void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val, | |
1673 | unsigned long *rflags) | |
1674 | { | |
1675 | switch (cr) { | |
1676 | case 0: | |
1677 | set_cr0(vcpu, mk_cr_64(vcpu->cr0, val)); | |
cbdd1bea | 1678 | *rflags = kvm_x86_ops->get_rflags(vcpu); |
6aa8b732 AK |
1679 | break; |
1680 | case 2: | |
1681 | vcpu->cr2 = val; | |
1682 | break; | |
1683 | case 3: | |
1684 | set_cr3(vcpu, val); | |
1685 | break; | |
1686 | case 4: | |
1687 | set_cr4(vcpu, mk_cr_64(vcpu->cr4, val)); | |
1688 | break; | |
1689 | default: | |
1690 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr); | |
1691 | } | |
1692 | } | |
1693 | ||
3bab1f5d AK |
1694 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
1695 | { | |
1696 | u64 data; | |
1697 | ||
1698 | switch (msr) { | |
1699 | case 0xc0010010: /* SYSCFG */ | |
1700 | case 0xc0010015: /* HWCR */ | |
1701 | case MSR_IA32_PLATFORM_ID: | |
1702 | case MSR_IA32_P5_MC_ADDR: | |
1703 | case MSR_IA32_P5_MC_TYPE: | |
1704 | case MSR_IA32_MC0_CTL: | |
1705 | case MSR_IA32_MCG_STATUS: | |
1706 | case MSR_IA32_MCG_CAP: | |
1707 | case MSR_IA32_MC0_MISC: | |
1708 | case MSR_IA32_MC0_MISC+4: | |
1709 | case MSR_IA32_MC0_MISC+8: | |
1710 | case MSR_IA32_MC0_MISC+12: | |
1711 | case MSR_IA32_MC0_MISC+16: | |
1712 | case MSR_IA32_UCODE_REV: | |
a8d13ea2 | 1713 | case MSR_IA32_PERF_STATUS: |
2dc7094b | 1714 | case MSR_IA32_EBL_CR_POWERON: |
3bab1f5d AK |
1715 | /* MTRR registers */ |
1716 | case 0xfe: | |
1717 | case 0x200 ... 0x2ff: | |
1718 | data = 0; | |
1719 | break; | |
a8d13ea2 AK |
1720 | case 0xcd: /* fsb frequency */ |
1721 | data = 3; | |
1722 | break; | |
3bab1f5d | 1723 | case MSR_IA32_APICBASE: |
7017fc3d | 1724 | data = kvm_get_apic_base(vcpu); |
3bab1f5d | 1725 | break; |
6f00e68f AK |
1726 | case MSR_IA32_MISC_ENABLE: |
1727 | data = vcpu->ia32_misc_enable_msr; | |
1728 | break; | |
3bab1f5d AK |
1729 | #ifdef CONFIG_X86_64 |
1730 | case MSR_EFER: | |
1731 | data = vcpu->shadow_efer; | |
1732 | break; | |
1733 | #endif | |
1734 | default: | |
f0242478 | 1735 | pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr); |
3bab1f5d AK |
1736 | return 1; |
1737 | } | |
1738 | *pdata = data; | |
1739 | return 0; | |
1740 | } | |
1741 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); | |
1742 | ||
6aa8b732 AK |
1743 | /* |
1744 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
1745 | * Returns 0 on success, non-0 otherwise. | |
1746 | * Assumes vcpu_load() was already called. | |
1747 | */ | |
35f3f286 | 1748 | int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) |
6aa8b732 | 1749 | { |
cbdd1bea | 1750 | return kvm_x86_ops->get_msr(vcpu, msr_index, pdata); |
6aa8b732 AK |
1751 | } |
1752 | ||
05b3e0c2 | 1753 | #ifdef CONFIG_X86_64 |
6aa8b732 | 1754 | |
3bab1f5d | 1755 | static void set_efer(struct kvm_vcpu *vcpu, u64 efer) |
6aa8b732 | 1756 | { |
6aa8b732 AK |
1757 | if (efer & EFER_RESERVED_BITS) { |
1758 | printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n", | |
1759 | efer); | |
1760 | inject_gp(vcpu); | |
1761 | return; | |
1762 | } | |
1763 | ||
1764 | if (is_paging(vcpu) | |
1765 | && (vcpu->shadow_efer & EFER_LME) != (efer & EFER_LME)) { | |
1766 | printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n"); | |
1767 | inject_gp(vcpu); | |
1768 | return; | |
1769 | } | |
1770 | ||
cbdd1bea | 1771 | kvm_x86_ops->set_efer(vcpu, efer); |
7725f0ba | 1772 | |
6aa8b732 AK |
1773 | efer &= ~EFER_LMA; |
1774 | efer |= vcpu->shadow_efer & EFER_LMA; | |
1775 | ||
1776 | vcpu->shadow_efer = efer; | |
6aa8b732 | 1777 | } |
6aa8b732 AK |
1778 | |
1779 | #endif | |
1780 | ||
3bab1f5d AK |
1781 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
1782 | { | |
1783 | switch (msr) { | |
1784 | #ifdef CONFIG_X86_64 | |
1785 | case MSR_EFER: | |
1786 | set_efer(vcpu, data); | |
1787 | break; | |
1788 | #endif | |
1789 | case MSR_IA32_MC0_STATUS: | |
f0242478 | 1790 | pr_unimpl(vcpu, "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n", |
3bab1f5d AK |
1791 | __FUNCTION__, data); |
1792 | break; | |
0e5bf0d0 | 1793 | case MSR_IA32_MCG_STATUS: |
f0242478 | 1794 | pr_unimpl(vcpu, "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n", |
0e5bf0d0 SK |
1795 | __FUNCTION__, data); |
1796 | break; | |
3bab1f5d AK |
1797 | case MSR_IA32_UCODE_REV: |
1798 | case MSR_IA32_UCODE_WRITE: | |
1799 | case 0x200 ... 0x2ff: /* MTRRs */ | |
1800 | break; | |
1801 | case MSR_IA32_APICBASE: | |
7017fc3d | 1802 | kvm_set_apic_base(vcpu, data); |
3bab1f5d | 1803 | break; |
6f00e68f AK |
1804 | case MSR_IA32_MISC_ENABLE: |
1805 | vcpu->ia32_misc_enable_msr = data; | |
1806 | break; | |
3bab1f5d | 1807 | default: |
f0242478 | 1808 | pr_unimpl(vcpu, "unhandled wrmsr: 0x%x\n", msr); |
3bab1f5d AK |
1809 | return 1; |
1810 | } | |
1811 | return 0; | |
1812 | } | |
1813 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); | |
1814 | ||
6aa8b732 AK |
1815 | /* |
1816 | * Writes msr value into into the appropriate "register". | |
1817 | * Returns 0 on success, non-0 otherwise. | |
1818 | * Assumes vcpu_load() was already called. | |
1819 | */ | |
35f3f286 | 1820 | int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) |
6aa8b732 | 1821 | { |
cbdd1bea | 1822 | return kvm_x86_ops->set_msr(vcpu, msr_index, data); |
6aa8b732 AK |
1823 | } |
1824 | ||
1825 | void kvm_resched(struct kvm_vcpu *vcpu) | |
1826 | { | |
3fca0365 YD |
1827 | if (!need_resched()) |
1828 | return; | |
6aa8b732 | 1829 | cond_resched(); |
6aa8b732 AK |
1830 | } |
1831 | EXPORT_SYMBOL_GPL(kvm_resched); | |
1832 | ||
06465c5a AK |
1833 | void kvm_emulate_cpuid(struct kvm_vcpu *vcpu) |
1834 | { | |
1835 | int i; | |
1836 | u32 function; | |
1837 | struct kvm_cpuid_entry *e, *best; | |
1838 | ||
cbdd1bea | 1839 | kvm_x86_ops->cache_regs(vcpu); |
06465c5a AK |
1840 | function = vcpu->regs[VCPU_REGS_RAX]; |
1841 | vcpu->regs[VCPU_REGS_RAX] = 0; | |
1842 | vcpu->regs[VCPU_REGS_RBX] = 0; | |
1843 | vcpu->regs[VCPU_REGS_RCX] = 0; | |
1844 | vcpu->regs[VCPU_REGS_RDX] = 0; | |
1845 | best = NULL; | |
1846 | for (i = 0; i < vcpu->cpuid_nent; ++i) { | |
1847 | e = &vcpu->cpuid_entries[i]; | |
1848 | if (e->function == function) { | |
1849 | best = e; | |
1850 | break; | |
1851 | } | |
1852 | /* | |
1853 | * Both basic or both extended? | |
1854 | */ | |
1855 | if (((e->function ^ function) & 0x80000000) == 0) | |
1856 | if (!best || e->function > best->function) | |
1857 | best = e; | |
1858 | } | |
1859 | if (best) { | |
1860 | vcpu->regs[VCPU_REGS_RAX] = best->eax; | |
1861 | vcpu->regs[VCPU_REGS_RBX] = best->ebx; | |
1862 | vcpu->regs[VCPU_REGS_RCX] = best->ecx; | |
1863 | vcpu->regs[VCPU_REGS_RDX] = best->edx; | |
1864 | } | |
cbdd1bea CE |
1865 | kvm_x86_ops->decache_regs(vcpu); |
1866 | kvm_x86_ops->skip_emulated_instruction(vcpu); | |
06465c5a AK |
1867 | } |
1868 | EXPORT_SYMBOL_GPL(kvm_emulate_cpuid); | |
1869 | ||
039576c0 | 1870 | static int pio_copy_data(struct kvm_vcpu *vcpu) |
46fc1477 | 1871 | { |
039576c0 AK |
1872 | void *p = vcpu->pio_data; |
1873 | void *q; | |
1874 | unsigned bytes; | |
1875 | int nr_pages = vcpu->pio.guest_pages[1] ? 2 : 1; | |
1876 | ||
039576c0 AK |
1877 | q = vmap(vcpu->pio.guest_pages, nr_pages, VM_READ|VM_WRITE, |
1878 | PAGE_KERNEL); | |
1879 | if (!q) { | |
039576c0 AK |
1880 | free_pio_guest_pages(vcpu); |
1881 | return -ENOMEM; | |
1882 | } | |
1883 | q += vcpu->pio.guest_page_offset; | |
1884 | bytes = vcpu->pio.size * vcpu->pio.cur_count; | |
1885 | if (vcpu->pio.in) | |
1886 | memcpy(q, p, bytes); | |
1887 | else | |
1888 | memcpy(p, q, bytes); | |
1889 | q -= vcpu->pio.guest_page_offset; | |
1890 | vunmap(q); | |
039576c0 AK |
1891 | free_pio_guest_pages(vcpu); |
1892 | return 0; | |
1893 | } | |
1894 | ||
1895 | static int complete_pio(struct kvm_vcpu *vcpu) | |
1896 | { | |
1897 | struct kvm_pio_request *io = &vcpu->pio; | |
46fc1477 | 1898 | long delta; |
039576c0 | 1899 | int r; |
46fc1477 | 1900 | |
cbdd1bea | 1901 | kvm_x86_ops->cache_regs(vcpu); |
46fc1477 AK |
1902 | |
1903 | if (!io->string) { | |
039576c0 AK |
1904 | if (io->in) |
1905 | memcpy(&vcpu->regs[VCPU_REGS_RAX], vcpu->pio_data, | |
46fc1477 AK |
1906 | io->size); |
1907 | } else { | |
039576c0 AK |
1908 | if (io->in) { |
1909 | r = pio_copy_data(vcpu); | |
1910 | if (r) { | |
cbdd1bea | 1911 | kvm_x86_ops->cache_regs(vcpu); |
039576c0 AK |
1912 | return r; |
1913 | } | |
1914 | } | |
1915 | ||
46fc1477 AK |
1916 | delta = 1; |
1917 | if (io->rep) { | |
039576c0 | 1918 | delta *= io->cur_count; |
46fc1477 AK |
1919 | /* |
1920 | * The size of the register should really depend on | |
1921 | * current address size. | |
1922 | */ | |
1923 | vcpu->regs[VCPU_REGS_RCX] -= delta; | |
1924 | } | |
039576c0 | 1925 | if (io->down) |
46fc1477 AK |
1926 | delta = -delta; |
1927 | delta *= io->size; | |
039576c0 | 1928 | if (io->in) |
46fc1477 AK |
1929 | vcpu->regs[VCPU_REGS_RDI] += delta; |
1930 | else | |
1931 | vcpu->regs[VCPU_REGS_RSI] += delta; | |
1932 | } | |
1933 | ||
cbdd1bea | 1934 | kvm_x86_ops->decache_regs(vcpu); |
46fc1477 | 1935 | |
039576c0 AK |
1936 | io->count -= io->cur_count; |
1937 | io->cur_count = 0; | |
1938 | ||
039576c0 | 1939 | return 0; |
46fc1477 AK |
1940 | } |
1941 | ||
65619eb5 ED |
1942 | static void kernel_pio(struct kvm_io_device *pio_dev, |
1943 | struct kvm_vcpu *vcpu, | |
1944 | void *pd) | |
74906345 ED |
1945 | { |
1946 | /* TODO: String I/O for in kernel device */ | |
1947 | ||
9cf98828 | 1948 | mutex_lock(&vcpu->kvm->lock); |
74906345 ED |
1949 | if (vcpu->pio.in) |
1950 | kvm_iodevice_read(pio_dev, vcpu->pio.port, | |
1951 | vcpu->pio.size, | |
65619eb5 | 1952 | pd); |
74906345 ED |
1953 | else |
1954 | kvm_iodevice_write(pio_dev, vcpu->pio.port, | |
1955 | vcpu->pio.size, | |
65619eb5 | 1956 | pd); |
9cf98828 | 1957 | mutex_unlock(&vcpu->kvm->lock); |
65619eb5 ED |
1958 | } |
1959 | ||
1960 | static void pio_string_write(struct kvm_io_device *pio_dev, | |
1961 | struct kvm_vcpu *vcpu) | |
1962 | { | |
1963 | struct kvm_pio_request *io = &vcpu->pio; | |
1964 | void *pd = vcpu->pio_data; | |
1965 | int i; | |
1966 | ||
9cf98828 | 1967 | mutex_lock(&vcpu->kvm->lock); |
65619eb5 ED |
1968 | for (i = 0; i < io->cur_count; i++) { |
1969 | kvm_iodevice_write(pio_dev, io->port, | |
1970 | io->size, | |
1971 | pd); | |
1972 | pd += io->size; | |
1973 | } | |
9cf98828 | 1974 | mutex_unlock(&vcpu->kvm->lock); |
74906345 ED |
1975 | } |
1976 | ||
d77c26fc | 1977 | int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, |
3090dd73 LV |
1978 | int size, unsigned port) |
1979 | { | |
1980 | struct kvm_io_device *pio_dev; | |
1981 | ||
1982 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
1983 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; | |
1984 | vcpu->run->io.size = vcpu->pio.size = size; | |
1985 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; | |
1986 | vcpu->run->io.count = vcpu->pio.count = vcpu->pio.cur_count = 1; | |
1987 | vcpu->run->io.port = vcpu->pio.port = port; | |
1988 | vcpu->pio.in = in; | |
1989 | vcpu->pio.string = 0; | |
1990 | vcpu->pio.down = 0; | |
1991 | vcpu->pio.guest_page_offset = 0; | |
1992 | vcpu->pio.rep = 0; | |
1993 | ||
cbdd1bea | 1994 | kvm_x86_ops->cache_regs(vcpu); |
3090dd73 | 1995 | memcpy(vcpu->pio_data, &vcpu->regs[VCPU_REGS_RAX], 4); |
cbdd1bea | 1996 | kvm_x86_ops->decache_regs(vcpu); |
3090dd73 | 1997 | |
0967b7bf AK |
1998 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
1999 | ||
3090dd73 LV |
2000 | pio_dev = vcpu_find_pio_dev(vcpu, port); |
2001 | if (pio_dev) { | |
2002 | kernel_pio(pio_dev, vcpu, vcpu->pio_data); | |
2003 | complete_pio(vcpu); | |
2004 | return 1; | |
2005 | } | |
2006 | return 0; | |
2007 | } | |
2008 | EXPORT_SYMBOL_GPL(kvm_emulate_pio); | |
2009 | ||
2010 | int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, | |
2011 | int size, unsigned long count, int down, | |
039576c0 AK |
2012 | gva_t address, int rep, unsigned port) |
2013 | { | |
2014 | unsigned now, in_page; | |
65619eb5 | 2015 | int i, ret = 0; |
039576c0 AK |
2016 | int nr_pages = 1; |
2017 | struct page *page; | |
74906345 | 2018 | struct kvm_io_device *pio_dev; |
039576c0 AK |
2019 | |
2020 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
2021 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; | |
3090dd73 | 2022 | vcpu->run->io.size = vcpu->pio.size = size; |
039576c0 | 2023 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; |
3090dd73 LV |
2024 | vcpu->run->io.count = vcpu->pio.count = vcpu->pio.cur_count = count; |
2025 | vcpu->run->io.port = vcpu->pio.port = port; | |
039576c0 | 2026 | vcpu->pio.in = in; |
3090dd73 | 2027 | vcpu->pio.string = 1; |
039576c0 AK |
2028 | vcpu->pio.down = down; |
2029 | vcpu->pio.guest_page_offset = offset_in_page(address); | |
2030 | vcpu->pio.rep = rep; | |
2031 | ||
039576c0 | 2032 | if (!count) { |
cbdd1bea | 2033 | kvm_x86_ops->skip_emulated_instruction(vcpu); |
039576c0 AK |
2034 | return 1; |
2035 | } | |
2036 | ||
039576c0 AK |
2037 | if (!down) |
2038 | in_page = PAGE_SIZE - offset_in_page(address); | |
2039 | else | |
2040 | in_page = offset_in_page(address) + size; | |
2041 | now = min(count, (unsigned long)in_page / size); | |
2042 | if (!now) { | |
2043 | /* | |
2044 | * String I/O straddles page boundary. Pin two guest pages | |
2045 | * so that we satisfy atomicity constraints. Do just one | |
2046 | * transaction to avoid complexity. | |
2047 | */ | |
2048 | nr_pages = 2; | |
2049 | now = 1; | |
2050 | } | |
2051 | if (down) { | |
2052 | /* | |
2053 | * String I/O in reverse. Yuck. Kill the guest, fix later. | |
2054 | */ | |
f0242478 | 2055 | pr_unimpl(vcpu, "guest string pio down\n"); |
039576c0 AK |
2056 | inject_gp(vcpu); |
2057 | return 1; | |
2058 | } | |
2059 | vcpu->run->io.count = now; | |
2060 | vcpu->pio.cur_count = now; | |
2061 | ||
0967b7bf AK |
2062 | if (vcpu->pio.cur_count == vcpu->pio.count) |
2063 | kvm_x86_ops->skip_emulated_instruction(vcpu); | |
2064 | ||
039576c0 | 2065 | for (i = 0; i < nr_pages; ++i) { |
11ec2804 | 2066 | mutex_lock(&vcpu->kvm->lock); |
039576c0 AK |
2067 | page = gva_to_page(vcpu, address + i * PAGE_SIZE); |
2068 | if (page) | |
2069 | get_page(page); | |
2070 | vcpu->pio.guest_pages[i] = page; | |
11ec2804 | 2071 | mutex_unlock(&vcpu->kvm->lock); |
039576c0 AK |
2072 | if (!page) { |
2073 | inject_gp(vcpu); | |
2074 | free_pio_guest_pages(vcpu); | |
2075 | return 1; | |
2076 | } | |
2077 | } | |
2078 | ||
3090dd73 | 2079 | pio_dev = vcpu_find_pio_dev(vcpu, port); |
65619eb5 ED |
2080 | if (!vcpu->pio.in) { |
2081 | /* string PIO write */ | |
2082 | ret = pio_copy_data(vcpu); | |
2083 | if (ret >= 0 && pio_dev) { | |
2084 | pio_string_write(pio_dev, vcpu); | |
2085 | complete_pio(vcpu); | |
2086 | if (vcpu->pio.count == 0) | |
2087 | ret = 1; | |
2088 | } | |
2089 | } else if (pio_dev) | |
f0242478 | 2090 | pr_unimpl(vcpu, "no string pio read support yet, " |
65619eb5 ED |
2091 | "port %x size %d count %ld\n", |
2092 | port, size, count); | |
2093 | ||
2094 | return ret; | |
039576c0 | 2095 | } |
3090dd73 | 2096 | EXPORT_SYMBOL_GPL(kvm_emulate_pio_string); |
039576c0 | 2097 | |
04d2cc77 AK |
2098 | /* |
2099 | * Check if userspace requested an interrupt window, and that the | |
2100 | * interrupt window is open. | |
2101 | * | |
2102 | * No need to exit to userspace if we already have an interrupt queued. | |
2103 | */ | |
2104 | static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu, | |
2105 | struct kvm_run *kvm_run) | |
2106 | { | |
2107 | return (!vcpu->irq_summary && | |
2108 | kvm_run->request_interrupt_window && | |
2109 | vcpu->interrupt_window_open && | |
2110 | (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF)); | |
2111 | } | |
2112 | ||
2113 | static void post_kvm_run_save(struct kvm_vcpu *vcpu, | |
2114 | struct kvm_run *kvm_run) | |
2115 | { | |
2116 | kvm_run->if_flag = (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF) != 0; | |
2117 | kvm_run->cr8 = get_cr8(vcpu); | |
2118 | kvm_run->apic_base = kvm_get_apic_base(vcpu); | |
2119 | if (irqchip_in_kernel(vcpu->kvm)) | |
2120 | kvm_run->ready_for_interrupt_injection = 1; | |
2121 | else | |
2122 | kvm_run->ready_for_interrupt_injection = | |
2123 | (vcpu->interrupt_window_open && | |
2124 | vcpu->irq_summary == 0); | |
2125 | } | |
2126 | ||
2127 | static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) | |
2128 | { | |
2129 | int r; | |
2130 | ||
2131 | if (unlikely(vcpu->mp_state == VCPU_MP_STATE_SIPI_RECEIVED)) { | |
d77c26fc | 2132 | pr_debug("vcpu %d received sipi with vector # %x\n", |
04d2cc77 AK |
2133 | vcpu->vcpu_id, vcpu->sipi_vector); |
2134 | kvm_lapic_reset(vcpu); | |
2135 | kvm_x86_ops->vcpu_reset(vcpu); | |
2136 | vcpu->mp_state = VCPU_MP_STATE_RUNNABLE; | |
2137 | } | |
2138 | ||
2139 | preempted: | |
2140 | if (vcpu->guest_debug.enabled) | |
2141 | kvm_x86_ops->guest_debug_pre(vcpu); | |
2142 | ||
2143 | again: | |
2144 | r = kvm_mmu_reload(vcpu); | |
2145 | if (unlikely(r)) | |
2146 | goto out; | |
2147 | ||
2148 | preempt_disable(); | |
2149 | ||
2150 | kvm_x86_ops->prepare_guest_switch(vcpu); | |
2151 | kvm_load_guest_fpu(vcpu); | |
2152 | ||
2153 | local_irq_disable(); | |
2154 | ||
2155 | if (signal_pending(current)) { | |
2156 | local_irq_enable(); | |
2157 | preempt_enable(); | |
2158 | r = -EINTR; | |
2159 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
2160 | ++vcpu->stat.signal_exits; | |
2161 | goto out; | |
2162 | } | |
2163 | ||
2164 | if (irqchip_in_kernel(vcpu->kvm)) | |
2165 | kvm_x86_ops->inject_pending_irq(vcpu); | |
2166 | else if (!vcpu->mmio_read_completed) | |
2167 | kvm_x86_ops->inject_pending_vectors(vcpu, kvm_run); | |
2168 | ||
2169 | vcpu->guest_mode = 1; | |
d172fcd3 | 2170 | kvm_guest_enter(); |
04d2cc77 AK |
2171 | |
2172 | if (vcpu->requests) | |
2173 | if (test_and_clear_bit(KVM_TLB_FLUSH, &vcpu->requests)) | |
2174 | kvm_x86_ops->tlb_flush(vcpu); | |
2175 | ||
2176 | kvm_x86_ops->run(vcpu, kvm_run); | |
2177 | ||
2178 | vcpu->guest_mode = 0; | |
2179 | local_irq_enable(); | |
2180 | ||
2181 | ++vcpu->stat.exits; | |
2182 | ||
0552f73b LV |
2183 | /* |
2184 | * We must have an instruction between local_irq_enable() and | |
2185 | * kvm_guest_exit(), so the timer interrupt isn't delayed by | |
2186 | * the interrupt shadow. The stat.exits increment will do nicely. | |
2187 | * But we need to prevent reordering, hence this barrier(): | |
2188 | */ | |
2189 | barrier(); | |
2190 | ||
2191 | kvm_guest_exit(); | |
2192 | ||
04d2cc77 AK |
2193 | preempt_enable(); |
2194 | ||
2195 | /* | |
2196 | * Profile KVM exit RIPs: | |
2197 | */ | |
2198 | if (unlikely(prof_on == KVM_PROFILING)) { | |
2199 | kvm_x86_ops->cache_regs(vcpu); | |
2200 | profile_hit(KVM_PROFILING, (void *)vcpu->rip); | |
2201 | } | |
2202 | ||
2203 | r = kvm_x86_ops->handle_exit(kvm_run, vcpu); | |
2204 | ||
2205 | if (r > 0) { | |
2206 | if (dm_request_for_irq_injection(vcpu, kvm_run)) { | |
2207 | r = -EINTR; | |
2208 | kvm_run->exit_reason = KVM_EXIT_INTR; | |
2209 | ++vcpu->stat.request_irq_exits; | |
2210 | goto out; | |
2211 | } | |
2212 | if (!need_resched()) { | |
2213 | ++vcpu->stat.light_exits; | |
2214 | goto again; | |
2215 | } | |
2216 | } | |
2217 | ||
2218 | out: | |
2219 | if (r > 0) { | |
2220 | kvm_resched(vcpu); | |
2221 | goto preempted; | |
2222 | } | |
2223 | ||
2224 | post_kvm_run_save(vcpu, kvm_run); | |
2225 | ||
2226 | return r; | |
2227 | } | |
2228 | ||
2229 | ||
bccf2150 | 2230 | static int kvm_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
6aa8b732 | 2231 | { |
6aa8b732 | 2232 | int r; |
1961d276 | 2233 | sigset_t sigsaved; |
6aa8b732 | 2234 | |
bccf2150 | 2235 | vcpu_load(vcpu); |
6aa8b732 | 2236 | |
c5ec1534 HQ |
2237 | if (unlikely(vcpu->mp_state == VCPU_MP_STATE_UNINITIALIZED)) { |
2238 | kvm_vcpu_block(vcpu); | |
2239 | vcpu_put(vcpu); | |
2240 | return -EAGAIN; | |
2241 | } | |
2242 | ||
1961d276 AK |
2243 | if (vcpu->sigset_active) |
2244 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
2245 | ||
54810342 | 2246 | /* re-sync apic's tpr */ |
5cd4f6fd HQ |
2247 | if (!irqchip_in_kernel(vcpu->kvm)) |
2248 | set_cr8(vcpu, kvm_run->cr8); | |
54810342 | 2249 | |
02c83209 AK |
2250 | if (vcpu->pio.cur_count) { |
2251 | r = complete_pio(vcpu); | |
2252 | if (r) | |
2253 | goto out; | |
2254 | } | |
2255 | ||
2256 | if (vcpu->mmio_needed) { | |
2257 | memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8); | |
2258 | vcpu->mmio_read_completed = 1; | |
2259 | vcpu->mmio_needed = 0; | |
2260 | r = emulate_instruction(vcpu, kvm_run, | |
3427318f | 2261 | vcpu->mmio_fault_cr2, 0, 1); |
02c83209 AK |
2262 | if (r == EMULATE_DO_MMIO) { |
2263 | /* | |
2264 | * Read-modify-write. Back to userspace. | |
2265 | */ | |
02c83209 AK |
2266 | r = 0; |
2267 | goto out; | |
46fc1477 | 2268 | } |
6aa8b732 AK |
2269 | } |
2270 | ||
8eb7d334 | 2271 | if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) { |
cbdd1bea | 2272 | kvm_x86_ops->cache_regs(vcpu); |
b4e63f56 | 2273 | vcpu->regs[VCPU_REGS_RAX] = kvm_run->hypercall.ret; |
cbdd1bea | 2274 | kvm_x86_ops->decache_regs(vcpu); |
b4e63f56 AK |
2275 | } |
2276 | ||
04d2cc77 | 2277 | r = __vcpu_run(vcpu, kvm_run); |
6aa8b732 | 2278 | |
039576c0 | 2279 | out: |
1961d276 AK |
2280 | if (vcpu->sigset_active) |
2281 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
2282 | ||
6aa8b732 AK |
2283 | vcpu_put(vcpu); |
2284 | return r; | |
2285 | } | |
2286 | ||
bccf2150 AK |
2287 | static int kvm_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, |
2288 | struct kvm_regs *regs) | |
6aa8b732 | 2289 | { |
bccf2150 | 2290 | vcpu_load(vcpu); |
6aa8b732 | 2291 | |
cbdd1bea | 2292 | kvm_x86_ops->cache_regs(vcpu); |
6aa8b732 AK |
2293 | |
2294 | regs->rax = vcpu->regs[VCPU_REGS_RAX]; | |
2295 | regs->rbx = vcpu->regs[VCPU_REGS_RBX]; | |
2296 | regs->rcx = vcpu->regs[VCPU_REGS_RCX]; | |
2297 | regs->rdx = vcpu->regs[VCPU_REGS_RDX]; | |
2298 | regs->rsi = vcpu->regs[VCPU_REGS_RSI]; | |
2299 | regs->rdi = vcpu->regs[VCPU_REGS_RDI]; | |
2300 | regs->rsp = vcpu->regs[VCPU_REGS_RSP]; | |
2301 | regs->rbp = vcpu->regs[VCPU_REGS_RBP]; | |
05b3e0c2 | 2302 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
2303 | regs->r8 = vcpu->regs[VCPU_REGS_R8]; |
2304 | regs->r9 = vcpu->regs[VCPU_REGS_R9]; | |
2305 | regs->r10 = vcpu->regs[VCPU_REGS_R10]; | |
2306 | regs->r11 = vcpu->regs[VCPU_REGS_R11]; | |
2307 | regs->r12 = vcpu->regs[VCPU_REGS_R12]; | |
2308 | regs->r13 = vcpu->regs[VCPU_REGS_R13]; | |
2309 | regs->r14 = vcpu->regs[VCPU_REGS_R14]; | |
2310 | regs->r15 = vcpu->regs[VCPU_REGS_R15]; | |
2311 | #endif | |
2312 | ||
2313 | regs->rip = vcpu->rip; | |
cbdd1bea | 2314 | regs->rflags = kvm_x86_ops->get_rflags(vcpu); |
6aa8b732 AK |
2315 | |
2316 | /* | |
2317 | * Don't leak debug flags in case they were set for guest debugging | |
2318 | */ | |
2319 | if (vcpu->guest_debug.enabled && vcpu->guest_debug.singlestep) | |
2320 | regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF); | |
2321 | ||
2322 | vcpu_put(vcpu); | |
2323 | ||
2324 | return 0; | |
2325 | } | |
2326 | ||
bccf2150 AK |
2327 | static int kvm_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, |
2328 | struct kvm_regs *regs) | |
6aa8b732 | 2329 | { |
bccf2150 | 2330 | vcpu_load(vcpu); |
6aa8b732 AK |
2331 | |
2332 | vcpu->regs[VCPU_REGS_RAX] = regs->rax; | |
2333 | vcpu->regs[VCPU_REGS_RBX] = regs->rbx; | |
2334 | vcpu->regs[VCPU_REGS_RCX] = regs->rcx; | |
2335 | vcpu->regs[VCPU_REGS_RDX] = regs->rdx; | |
2336 | vcpu->regs[VCPU_REGS_RSI] = regs->rsi; | |
2337 | vcpu->regs[VCPU_REGS_RDI] = regs->rdi; | |
2338 | vcpu->regs[VCPU_REGS_RSP] = regs->rsp; | |
2339 | vcpu->regs[VCPU_REGS_RBP] = regs->rbp; | |
05b3e0c2 | 2340 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
2341 | vcpu->regs[VCPU_REGS_R8] = regs->r8; |
2342 | vcpu->regs[VCPU_REGS_R9] = regs->r9; | |
2343 | vcpu->regs[VCPU_REGS_R10] = regs->r10; | |
2344 | vcpu->regs[VCPU_REGS_R11] = regs->r11; | |
2345 | vcpu->regs[VCPU_REGS_R12] = regs->r12; | |
2346 | vcpu->regs[VCPU_REGS_R13] = regs->r13; | |
2347 | vcpu->regs[VCPU_REGS_R14] = regs->r14; | |
2348 | vcpu->regs[VCPU_REGS_R15] = regs->r15; | |
2349 | #endif | |
2350 | ||
2351 | vcpu->rip = regs->rip; | |
cbdd1bea | 2352 | kvm_x86_ops->set_rflags(vcpu, regs->rflags); |
6aa8b732 | 2353 | |
cbdd1bea | 2354 | kvm_x86_ops->decache_regs(vcpu); |
6aa8b732 AK |
2355 | |
2356 | vcpu_put(vcpu); | |
2357 | ||
2358 | return 0; | |
2359 | } | |
2360 | ||
2361 | static void get_segment(struct kvm_vcpu *vcpu, | |
2362 | struct kvm_segment *var, int seg) | |
2363 | { | |
cbdd1bea | 2364 | return kvm_x86_ops->get_segment(vcpu, var, seg); |
6aa8b732 AK |
2365 | } |
2366 | ||
bccf2150 AK |
2367 | static int kvm_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, |
2368 | struct kvm_sregs *sregs) | |
6aa8b732 | 2369 | { |
6aa8b732 | 2370 | struct descriptor_table dt; |
2a8067f1 | 2371 | int pending_vec; |
6aa8b732 | 2372 | |
bccf2150 | 2373 | vcpu_load(vcpu); |
6aa8b732 AK |
2374 | |
2375 | get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); | |
2376 | get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
2377 | get_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
2378 | get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
2379 | get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
2380 | get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
2381 | ||
2382 | get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); | |
2383 | get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
2384 | ||
cbdd1bea | 2385 | kvm_x86_ops->get_idt(vcpu, &dt); |
6aa8b732 AK |
2386 | sregs->idt.limit = dt.limit; |
2387 | sregs->idt.base = dt.base; | |
cbdd1bea | 2388 | kvm_x86_ops->get_gdt(vcpu, &dt); |
6aa8b732 AK |
2389 | sregs->gdt.limit = dt.limit; |
2390 | sregs->gdt.base = dt.base; | |
2391 | ||
cbdd1bea | 2392 | kvm_x86_ops->decache_cr4_guest_bits(vcpu); |
6aa8b732 AK |
2393 | sregs->cr0 = vcpu->cr0; |
2394 | sregs->cr2 = vcpu->cr2; | |
2395 | sregs->cr3 = vcpu->cr3; | |
2396 | sregs->cr4 = vcpu->cr4; | |
7017fc3d | 2397 | sregs->cr8 = get_cr8(vcpu); |
6aa8b732 | 2398 | sregs->efer = vcpu->shadow_efer; |
7017fc3d | 2399 | sregs->apic_base = kvm_get_apic_base(vcpu); |
6aa8b732 | 2400 | |
2a8067f1 | 2401 | if (irqchip_in_kernel(vcpu->kvm)) { |
c52fb35a HQ |
2402 | memset(sregs->interrupt_bitmap, 0, |
2403 | sizeof sregs->interrupt_bitmap); | |
cbdd1bea | 2404 | pending_vec = kvm_x86_ops->get_irq(vcpu); |
2a8067f1 | 2405 | if (pending_vec >= 0) |
d77c26fc MD |
2406 | set_bit(pending_vec, |
2407 | (unsigned long *)sregs->interrupt_bitmap); | |
2a8067f1 | 2408 | } else |
c52fb35a HQ |
2409 | memcpy(sregs->interrupt_bitmap, vcpu->irq_pending, |
2410 | sizeof sregs->interrupt_bitmap); | |
6aa8b732 AK |
2411 | |
2412 | vcpu_put(vcpu); | |
2413 | ||
2414 | return 0; | |
2415 | } | |
2416 | ||
2417 | static void set_segment(struct kvm_vcpu *vcpu, | |
2418 | struct kvm_segment *var, int seg) | |
2419 | { | |
cbdd1bea | 2420 | return kvm_x86_ops->set_segment(vcpu, var, seg); |
6aa8b732 AK |
2421 | } |
2422 | ||
bccf2150 AK |
2423 | static int kvm_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
2424 | struct kvm_sregs *sregs) | |
6aa8b732 | 2425 | { |
6aa8b732 | 2426 | int mmu_reset_needed = 0; |
2a8067f1 | 2427 | int i, pending_vec, max_bits; |
6aa8b732 AK |
2428 | struct descriptor_table dt; |
2429 | ||
bccf2150 | 2430 | vcpu_load(vcpu); |
6aa8b732 | 2431 | |
6aa8b732 AK |
2432 | dt.limit = sregs->idt.limit; |
2433 | dt.base = sregs->idt.base; | |
cbdd1bea | 2434 | kvm_x86_ops->set_idt(vcpu, &dt); |
6aa8b732 AK |
2435 | dt.limit = sregs->gdt.limit; |
2436 | dt.base = sregs->gdt.base; | |
cbdd1bea | 2437 | kvm_x86_ops->set_gdt(vcpu, &dt); |
6aa8b732 AK |
2438 | |
2439 | vcpu->cr2 = sregs->cr2; | |
2440 | mmu_reset_needed |= vcpu->cr3 != sregs->cr3; | |
2441 | vcpu->cr3 = sregs->cr3; | |
2442 | ||
7017fc3d | 2443 | set_cr8(vcpu, sregs->cr8); |
6aa8b732 AK |
2444 | |
2445 | mmu_reset_needed |= vcpu->shadow_efer != sregs->efer; | |
05b3e0c2 | 2446 | #ifdef CONFIG_X86_64 |
cbdd1bea | 2447 | kvm_x86_ops->set_efer(vcpu, sregs->efer); |
6aa8b732 | 2448 | #endif |
7017fc3d | 2449 | kvm_set_apic_base(vcpu, sregs->apic_base); |
6aa8b732 | 2450 | |
cbdd1bea | 2451 | kvm_x86_ops->decache_cr4_guest_bits(vcpu); |
399badf3 | 2452 | |
6aa8b732 | 2453 | mmu_reset_needed |= vcpu->cr0 != sregs->cr0; |
81f50e3b | 2454 | vcpu->cr0 = sregs->cr0; |
cbdd1bea | 2455 | kvm_x86_ops->set_cr0(vcpu, sregs->cr0); |
6aa8b732 AK |
2456 | |
2457 | mmu_reset_needed |= vcpu->cr4 != sregs->cr4; | |
cbdd1bea | 2458 | kvm_x86_ops->set_cr4(vcpu, sregs->cr4); |
1b0973bd AK |
2459 | if (!is_long_mode(vcpu) && is_pae(vcpu)) |
2460 | load_pdptrs(vcpu, vcpu->cr3); | |
6aa8b732 AK |
2461 | |
2462 | if (mmu_reset_needed) | |
2463 | kvm_mmu_reset_context(vcpu); | |
2464 | ||
c52fb35a HQ |
2465 | if (!irqchip_in_kernel(vcpu->kvm)) { |
2466 | memcpy(vcpu->irq_pending, sregs->interrupt_bitmap, | |
2467 | sizeof vcpu->irq_pending); | |
2468 | vcpu->irq_summary = 0; | |
2469 | for (i = 0; i < ARRAY_SIZE(vcpu->irq_pending); ++i) | |
2470 | if (vcpu->irq_pending[i]) | |
2471 | __set_bit(i, &vcpu->irq_summary); | |
2a8067f1 ED |
2472 | } else { |
2473 | max_bits = (sizeof sregs->interrupt_bitmap) << 3; | |
2474 | pending_vec = find_first_bit( | |
2475 | (const unsigned long *)sregs->interrupt_bitmap, | |
2476 | max_bits); | |
2477 | /* Only pending external irq is handled here */ | |
2478 | if (pending_vec < max_bits) { | |
cbdd1bea | 2479 | kvm_x86_ops->set_irq(vcpu, pending_vec); |
d77c26fc MD |
2480 | pr_debug("Set back pending irq %d\n", |
2481 | pending_vec); | |
2a8067f1 | 2482 | } |
c52fb35a | 2483 | } |
6aa8b732 | 2484 | |
024aa1c0 AK |
2485 | set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
2486 | set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
2487 | set_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
2488 | set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
2489 | set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
2490 | set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
2491 | ||
2492 | set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); | |
2493 | set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
2494 | ||
6aa8b732 AK |
2495 | vcpu_put(vcpu); |
2496 | ||
2497 | return 0; | |
2498 | } | |
2499 | ||
1747fb71 RR |
2500 | void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l) |
2501 | { | |
2502 | struct kvm_segment cs; | |
2503 | ||
2504 | get_segment(vcpu, &cs, VCPU_SREG_CS); | |
2505 | *db = cs.db; | |
2506 | *l = cs.l; | |
2507 | } | |
2508 | EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits); | |
2509 | ||
6aa8b732 AK |
2510 | /* |
2511 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS | |
2512 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. | |
bf591b24 MR |
2513 | * |
2514 | * This list is modified at module load time to reflect the | |
2515 | * capabilities of the host cpu. | |
6aa8b732 AK |
2516 | */ |
2517 | static u32 msrs_to_save[] = { | |
2518 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, | |
2519 | MSR_K6_STAR, | |
05b3e0c2 | 2520 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
2521 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, |
2522 | #endif | |
2523 | MSR_IA32_TIME_STAMP_COUNTER, | |
2524 | }; | |
2525 | ||
bf591b24 MR |
2526 | static unsigned num_msrs_to_save; |
2527 | ||
6f00e68f AK |
2528 | static u32 emulated_msrs[] = { |
2529 | MSR_IA32_MISC_ENABLE, | |
2530 | }; | |
2531 | ||
bf591b24 MR |
2532 | static __init void kvm_init_msr_list(void) |
2533 | { | |
2534 | u32 dummy[2]; | |
2535 | unsigned i, j; | |
2536 | ||
2537 | for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) { | |
2538 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) | |
2539 | continue; | |
2540 | if (j < i) | |
2541 | msrs_to_save[j] = msrs_to_save[i]; | |
2542 | j++; | |
2543 | } | |
2544 | num_msrs_to_save = j; | |
2545 | } | |
6aa8b732 AK |
2546 | |
2547 | /* | |
2548 | * Adapt set_msr() to msr_io()'s calling convention | |
2549 | */ | |
2550 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) | |
2551 | { | |
35f3f286 | 2552 | return kvm_set_msr(vcpu, index, *data); |
6aa8b732 AK |
2553 | } |
2554 | ||
2555 | /* | |
2556 | * Read or write a bunch of msrs. All parameters are kernel addresses. | |
2557 | * | |
2558 | * @return number of msrs set successfully. | |
2559 | */ | |
bccf2150 | 2560 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, |
6aa8b732 AK |
2561 | struct kvm_msr_entry *entries, |
2562 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
2563 | unsigned index, u64 *data)) | |
2564 | { | |
6aa8b732 AK |
2565 | int i; |
2566 | ||
bccf2150 | 2567 | vcpu_load(vcpu); |
6aa8b732 AK |
2568 | |
2569 | for (i = 0; i < msrs->nmsrs; ++i) | |
2570 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) | |
2571 | break; | |
2572 | ||
2573 | vcpu_put(vcpu); | |
2574 | ||
2575 | return i; | |
2576 | } | |
2577 | ||
2578 | /* | |
2579 | * Read or write a bunch of msrs. Parameters are user addresses. | |
2580 | * | |
2581 | * @return number of msrs set successfully. | |
2582 | */ | |
bccf2150 | 2583 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, |
6aa8b732 AK |
2584 | int (*do_msr)(struct kvm_vcpu *vcpu, |
2585 | unsigned index, u64 *data), | |
2586 | int writeback) | |
2587 | { | |
2588 | struct kvm_msrs msrs; | |
2589 | struct kvm_msr_entry *entries; | |
2590 | int r, n; | |
2591 | unsigned size; | |
2592 | ||
2593 | r = -EFAULT; | |
2594 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) | |
2595 | goto out; | |
2596 | ||
2597 | r = -E2BIG; | |
2598 | if (msrs.nmsrs >= MAX_IO_MSRS) | |
2599 | goto out; | |
2600 | ||
2601 | r = -ENOMEM; | |
2602 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; | |
2603 | entries = vmalloc(size); | |
2604 | if (!entries) | |
2605 | goto out; | |
2606 | ||
2607 | r = -EFAULT; | |
2608 | if (copy_from_user(entries, user_msrs->entries, size)) | |
2609 | goto out_free; | |
2610 | ||
bccf2150 | 2611 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); |
6aa8b732 AK |
2612 | if (r < 0) |
2613 | goto out_free; | |
2614 | ||
2615 | r = -EFAULT; | |
2616 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) | |
2617 | goto out_free; | |
2618 | ||
2619 | r = n; | |
2620 | ||
2621 | out_free: | |
2622 | vfree(entries); | |
2623 | out: | |
2624 | return r; | |
2625 | } | |
2626 | ||
2627 | /* | |
2628 | * Translate a guest virtual address to a guest physical address. | |
2629 | */ | |
bccf2150 AK |
2630 | static int kvm_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, |
2631 | struct kvm_translation *tr) | |
6aa8b732 AK |
2632 | { |
2633 | unsigned long vaddr = tr->linear_address; | |
6aa8b732 AK |
2634 | gpa_t gpa; |
2635 | ||
bccf2150 | 2636 | vcpu_load(vcpu); |
11ec2804 | 2637 | mutex_lock(&vcpu->kvm->lock); |
6aa8b732 AK |
2638 | gpa = vcpu->mmu.gva_to_gpa(vcpu, vaddr); |
2639 | tr->physical_address = gpa; | |
2640 | tr->valid = gpa != UNMAPPED_GVA; | |
2641 | tr->writeable = 1; | |
2642 | tr->usermode = 0; | |
11ec2804 | 2643 | mutex_unlock(&vcpu->kvm->lock); |
6aa8b732 AK |
2644 | vcpu_put(vcpu); |
2645 | ||
2646 | return 0; | |
2647 | } | |
2648 | ||
bccf2150 AK |
2649 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
2650 | struct kvm_interrupt *irq) | |
6aa8b732 | 2651 | { |
6aa8b732 AK |
2652 | if (irq->irq < 0 || irq->irq >= 256) |
2653 | return -EINVAL; | |
97222cc8 ED |
2654 | if (irqchip_in_kernel(vcpu->kvm)) |
2655 | return -ENXIO; | |
bccf2150 | 2656 | vcpu_load(vcpu); |
6aa8b732 AK |
2657 | |
2658 | set_bit(irq->irq, vcpu->irq_pending); | |
2659 | set_bit(irq->irq / BITS_PER_LONG, &vcpu->irq_summary); | |
2660 | ||
2661 | vcpu_put(vcpu); | |
2662 | ||
2663 | return 0; | |
2664 | } | |
2665 | ||
bccf2150 AK |
2666 | static int kvm_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu, |
2667 | struct kvm_debug_guest *dbg) | |
6aa8b732 | 2668 | { |
6aa8b732 AK |
2669 | int r; |
2670 | ||
bccf2150 | 2671 | vcpu_load(vcpu); |
6aa8b732 | 2672 | |
cbdd1bea | 2673 | r = kvm_x86_ops->set_guest_debug(vcpu, dbg); |
6aa8b732 AK |
2674 | |
2675 | vcpu_put(vcpu); | |
2676 | ||
2677 | return r; | |
2678 | } | |
2679 | ||
9a2bb7f4 AK |
2680 | static struct page *kvm_vcpu_nopage(struct vm_area_struct *vma, |
2681 | unsigned long address, | |
2682 | int *type) | |
2683 | { | |
2684 | struct kvm_vcpu *vcpu = vma->vm_file->private_data; | |
2685 | unsigned long pgoff; | |
2686 | struct page *page; | |
2687 | ||
9a2bb7f4 | 2688 | pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff; |
039576c0 AK |
2689 | if (pgoff == 0) |
2690 | page = virt_to_page(vcpu->run); | |
2691 | else if (pgoff == KVM_PIO_PAGE_OFFSET) | |
2692 | page = virt_to_page(vcpu->pio_data); | |
2693 | else | |
9a2bb7f4 | 2694 | return NOPAGE_SIGBUS; |
9a2bb7f4 | 2695 | get_page(page); |
cd0d9137 NAQ |
2696 | if (type != NULL) |
2697 | *type = VM_FAULT_MINOR; | |
2698 | ||
9a2bb7f4 AK |
2699 | return page; |
2700 | } | |
2701 | ||
2702 | static struct vm_operations_struct kvm_vcpu_vm_ops = { | |
2703 | .nopage = kvm_vcpu_nopage, | |
2704 | }; | |
2705 | ||
2706 | static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma) | |
2707 | { | |
2708 | vma->vm_ops = &kvm_vcpu_vm_ops; | |
2709 | return 0; | |
2710 | } | |
2711 | ||
bccf2150 AK |
2712 | static int kvm_vcpu_release(struct inode *inode, struct file *filp) |
2713 | { | |
2714 | struct kvm_vcpu *vcpu = filp->private_data; | |
2715 | ||
2716 | fput(vcpu->kvm->filp); | |
2717 | return 0; | |
2718 | } | |
2719 | ||
2720 | static struct file_operations kvm_vcpu_fops = { | |
2721 | .release = kvm_vcpu_release, | |
2722 | .unlocked_ioctl = kvm_vcpu_ioctl, | |
2723 | .compat_ioctl = kvm_vcpu_ioctl, | |
9a2bb7f4 | 2724 | .mmap = kvm_vcpu_mmap, |
bccf2150 AK |
2725 | }; |
2726 | ||
2727 | /* | |
2728 | * Allocates an inode for the vcpu. | |
2729 | */ | |
2730 | static int create_vcpu_fd(struct kvm_vcpu *vcpu) | |
2731 | { | |
2732 | int fd, r; | |
2733 | struct inode *inode; | |
2734 | struct file *file; | |
2735 | ||
d6d28168 AK |
2736 | r = anon_inode_getfd(&fd, &inode, &file, |
2737 | "kvm-vcpu", &kvm_vcpu_fops, vcpu); | |
2738 | if (r) | |
2739 | return r; | |
bccf2150 | 2740 | atomic_inc(&vcpu->kvm->filp->f_count); |
bccf2150 | 2741 | return fd; |
bccf2150 AK |
2742 | } |
2743 | ||
c5ea7660 AK |
2744 | /* |
2745 | * Creates some virtual cpus. Good luck creating more than one. | |
2746 | */ | |
2747 | static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n) | |
2748 | { | |
2749 | int r; | |
2750 | struct kvm_vcpu *vcpu; | |
2751 | ||
c5ea7660 | 2752 | if (!valid_vcpu(n)) |
fb3f0f51 | 2753 | return -EINVAL; |
c5ea7660 | 2754 | |
cbdd1bea | 2755 | vcpu = kvm_x86_ops->vcpu_create(kvm, n); |
fb3f0f51 RR |
2756 | if (IS_ERR(vcpu)) |
2757 | return PTR_ERR(vcpu); | |
c5ea7660 | 2758 | |
15ad7146 AK |
2759 | preempt_notifier_init(&vcpu->preempt_notifier, &kvm_preempt_ops); |
2760 | ||
b114b080 RR |
2761 | /* We do fxsave: this must be aligned. */ |
2762 | BUG_ON((unsigned long)&vcpu->host_fx_image & 0xF); | |
2763 | ||
fb3f0f51 | 2764 | vcpu_load(vcpu); |
c5ea7660 | 2765 | r = kvm_mmu_setup(vcpu); |
c5ea7660 | 2766 | vcpu_put(vcpu); |
c5ea7660 | 2767 | if (r < 0) |
fb3f0f51 RR |
2768 | goto free_vcpu; |
2769 | ||
11ec2804 | 2770 | mutex_lock(&kvm->lock); |
fb3f0f51 RR |
2771 | if (kvm->vcpus[n]) { |
2772 | r = -EEXIST; | |
11ec2804 | 2773 | mutex_unlock(&kvm->lock); |
fb3f0f51 RR |
2774 | goto mmu_unload; |
2775 | } | |
2776 | kvm->vcpus[n] = vcpu; | |
11ec2804 | 2777 | mutex_unlock(&kvm->lock); |
c5ea7660 | 2778 | |
fb3f0f51 | 2779 | /* Now it's all set up, let userspace reach it */ |
bccf2150 AK |
2780 | r = create_vcpu_fd(vcpu); |
2781 | if (r < 0) | |
fb3f0f51 RR |
2782 | goto unlink; |
2783 | return r; | |
39c3b86e | 2784 | |
fb3f0f51 | 2785 | unlink: |
11ec2804 | 2786 | mutex_lock(&kvm->lock); |
fb3f0f51 | 2787 | kvm->vcpus[n] = NULL; |
11ec2804 | 2788 | mutex_unlock(&kvm->lock); |
a2fa3e9f | 2789 | |
fb3f0f51 RR |
2790 | mmu_unload: |
2791 | vcpu_load(vcpu); | |
2792 | kvm_mmu_unload(vcpu); | |
2793 | vcpu_put(vcpu); | |
c5ea7660 | 2794 | |
fb3f0f51 | 2795 | free_vcpu: |
cbdd1bea | 2796 | kvm_x86_ops->vcpu_free(vcpu); |
c5ea7660 AK |
2797 | return r; |
2798 | } | |
2799 | ||
2cc51560 ED |
2800 | static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu) |
2801 | { | |
2802 | u64 efer; | |
2803 | int i; | |
2804 | struct kvm_cpuid_entry *e, *entry; | |
2805 | ||
2806 | rdmsrl(MSR_EFER, efer); | |
2807 | entry = NULL; | |
2808 | for (i = 0; i < vcpu->cpuid_nent; ++i) { | |
2809 | e = &vcpu->cpuid_entries[i]; | |
2810 | if (e->function == 0x80000001) { | |
2811 | entry = e; | |
2812 | break; | |
2813 | } | |
2814 | } | |
4c981b43 | 2815 | if (entry && (entry->edx & (1 << 20)) && !(efer & EFER_NX)) { |
2cc51560 | 2816 | entry->edx &= ~(1 << 20); |
4c981b43 | 2817 | printk(KERN_INFO "kvm: guest NX capability removed\n"); |
2cc51560 ED |
2818 | } |
2819 | } | |
2820 | ||
06465c5a AK |
2821 | static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu, |
2822 | struct kvm_cpuid *cpuid, | |
2823 | struct kvm_cpuid_entry __user *entries) | |
2824 | { | |
2825 | int r; | |
2826 | ||
2827 | r = -E2BIG; | |
2828 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
2829 | goto out; | |
2830 | r = -EFAULT; | |
2831 | if (copy_from_user(&vcpu->cpuid_entries, entries, | |
2832 | cpuid->nent * sizeof(struct kvm_cpuid_entry))) | |
2833 | goto out; | |
2834 | vcpu->cpuid_nent = cpuid->nent; | |
2cc51560 | 2835 | cpuid_fix_nx_cap(vcpu); |
06465c5a AK |
2836 | return 0; |
2837 | ||
2838 | out: | |
2839 | return r; | |
2840 | } | |
2841 | ||
1961d276 AK |
2842 | static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset) |
2843 | { | |
2844 | if (sigset) { | |
2845 | sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
2846 | vcpu->sigset_active = 1; | |
2847 | vcpu->sigset = *sigset; | |
2848 | } else | |
2849 | vcpu->sigset_active = 0; | |
2850 | return 0; | |
2851 | } | |
2852 | ||
b8836737 AK |
2853 | /* |
2854 | * fxsave fpu state. Taken from x86_64/processor.h. To be killed when | |
2855 | * we have asm/x86/processor.h | |
2856 | */ | |
2857 | struct fxsave { | |
2858 | u16 cwd; | |
2859 | u16 swd; | |
2860 | u16 twd; | |
2861 | u16 fop; | |
2862 | u64 rip; | |
2863 | u64 rdp; | |
2864 | u32 mxcsr; | |
2865 | u32 mxcsr_mask; | |
2866 | u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */ | |
2867 | #ifdef CONFIG_X86_64 | |
2868 | u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */ | |
2869 | #else | |
2870 | u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */ | |
2871 | #endif | |
2872 | }; | |
2873 | ||
2874 | static int kvm_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
2875 | { | |
b114b080 | 2876 | struct fxsave *fxsave = (struct fxsave *)&vcpu->guest_fx_image; |
b8836737 AK |
2877 | |
2878 | vcpu_load(vcpu); | |
2879 | ||
2880 | memcpy(fpu->fpr, fxsave->st_space, 128); | |
2881 | fpu->fcw = fxsave->cwd; | |
2882 | fpu->fsw = fxsave->swd; | |
2883 | fpu->ftwx = fxsave->twd; | |
2884 | fpu->last_opcode = fxsave->fop; | |
2885 | fpu->last_ip = fxsave->rip; | |
2886 | fpu->last_dp = fxsave->rdp; | |
2887 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space); | |
2888 | ||
2889 | vcpu_put(vcpu); | |
2890 | ||
2891 | return 0; | |
2892 | } | |
2893 | ||
2894 | static int kvm_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
2895 | { | |
b114b080 | 2896 | struct fxsave *fxsave = (struct fxsave *)&vcpu->guest_fx_image; |
b8836737 AK |
2897 | |
2898 | vcpu_load(vcpu); | |
2899 | ||
2900 | memcpy(fxsave->st_space, fpu->fpr, 128); | |
2901 | fxsave->cwd = fpu->fcw; | |
2902 | fxsave->swd = fpu->fsw; | |
2903 | fxsave->twd = fpu->ftwx; | |
2904 | fxsave->fop = fpu->last_opcode; | |
2905 | fxsave->rip = fpu->last_ip; | |
2906 | fxsave->rdp = fpu->last_dp; | |
2907 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space); | |
2908 | ||
2909 | vcpu_put(vcpu); | |
2910 | ||
2911 | return 0; | |
2912 | } | |
2913 | ||
96ad2cc6 ED |
2914 | static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu, |
2915 | struct kvm_lapic_state *s) | |
2916 | { | |
2917 | vcpu_load(vcpu); | |
2918 | memcpy(s->regs, vcpu->apic->regs, sizeof *s); | |
2919 | vcpu_put(vcpu); | |
2920 | ||
2921 | return 0; | |
2922 | } | |
2923 | ||
2924 | static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu, | |
2925 | struct kvm_lapic_state *s) | |
2926 | { | |
2927 | vcpu_load(vcpu); | |
2928 | memcpy(vcpu->apic->regs, s->regs, sizeof *s); | |
2929 | kvm_apic_post_state_restore(vcpu); | |
2930 | vcpu_put(vcpu); | |
2931 | ||
2932 | return 0; | |
2933 | } | |
2934 | ||
bccf2150 AK |
2935 | static long kvm_vcpu_ioctl(struct file *filp, |
2936 | unsigned int ioctl, unsigned long arg) | |
6aa8b732 | 2937 | { |
bccf2150 | 2938 | struct kvm_vcpu *vcpu = filp->private_data; |
2f366987 | 2939 | void __user *argp = (void __user *)arg; |
6aa8b732 AK |
2940 | int r = -EINVAL; |
2941 | ||
2942 | switch (ioctl) { | |
9a2bb7f4 | 2943 | case KVM_RUN: |
f0fe5108 AK |
2944 | r = -EINVAL; |
2945 | if (arg) | |
2946 | goto out; | |
9a2bb7f4 | 2947 | r = kvm_vcpu_ioctl_run(vcpu, vcpu->run); |
6aa8b732 | 2948 | break; |
6aa8b732 AK |
2949 | case KVM_GET_REGS: { |
2950 | struct kvm_regs kvm_regs; | |
2951 | ||
bccf2150 AK |
2952 | memset(&kvm_regs, 0, sizeof kvm_regs); |
2953 | r = kvm_vcpu_ioctl_get_regs(vcpu, &kvm_regs); | |
6aa8b732 AK |
2954 | if (r) |
2955 | goto out; | |
2956 | r = -EFAULT; | |
2f366987 | 2957 | if (copy_to_user(argp, &kvm_regs, sizeof kvm_regs)) |
6aa8b732 AK |
2958 | goto out; |
2959 | r = 0; | |
2960 | break; | |
2961 | } | |
2962 | case KVM_SET_REGS: { | |
2963 | struct kvm_regs kvm_regs; | |
2964 | ||
2965 | r = -EFAULT; | |
2f366987 | 2966 | if (copy_from_user(&kvm_regs, argp, sizeof kvm_regs)) |
6aa8b732 | 2967 | goto out; |
bccf2150 | 2968 | r = kvm_vcpu_ioctl_set_regs(vcpu, &kvm_regs); |
6aa8b732 AK |
2969 | if (r) |
2970 | goto out; | |
2971 | r = 0; | |
2972 | break; | |
2973 | } | |
2974 | case KVM_GET_SREGS: { | |
2975 | struct kvm_sregs kvm_sregs; | |
2976 | ||
bccf2150 AK |
2977 | memset(&kvm_sregs, 0, sizeof kvm_sregs); |
2978 | r = kvm_vcpu_ioctl_get_sregs(vcpu, &kvm_sregs); | |
6aa8b732 AK |
2979 | if (r) |
2980 | goto out; | |
2981 | r = -EFAULT; | |
2f366987 | 2982 | if (copy_to_user(argp, &kvm_sregs, sizeof kvm_sregs)) |
6aa8b732 AK |
2983 | goto out; |
2984 | r = 0; | |
2985 | break; | |
2986 | } | |
2987 | case KVM_SET_SREGS: { | |
2988 | struct kvm_sregs kvm_sregs; | |
2989 | ||
2990 | r = -EFAULT; | |
2f366987 | 2991 | if (copy_from_user(&kvm_sregs, argp, sizeof kvm_sregs)) |
6aa8b732 | 2992 | goto out; |
bccf2150 | 2993 | r = kvm_vcpu_ioctl_set_sregs(vcpu, &kvm_sregs); |
6aa8b732 AK |
2994 | if (r) |
2995 | goto out; | |
2996 | r = 0; | |
2997 | break; | |
2998 | } | |
2999 | case KVM_TRANSLATE: { | |
3000 | struct kvm_translation tr; | |
3001 | ||
3002 | r = -EFAULT; | |
2f366987 | 3003 | if (copy_from_user(&tr, argp, sizeof tr)) |
6aa8b732 | 3004 | goto out; |
bccf2150 | 3005 | r = kvm_vcpu_ioctl_translate(vcpu, &tr); |
6aa8b732 AK |
3006 | if (r) |
3007 | goto out; | |
3008 | r = -EFAULT; | |
2f366987 | 3009 | if (copy_to_user(argp, &tr, sizeof tr)) |
6aa8b732 AK |
3010 | goto out; |
3011 | r = 0; | |
3012 | break; | |
3013 | } | |
3014 | case KVM_INTERRUPT: { | |
3015 | struct kvm_interrupt irq; | |
3016 | ||
3017 | r = -EFAULT; | |
2f366987 | 3018 | if (copy_from_user(&irq, argp, sizeof irq)) |
6aa8b732 | 3019 | goto out; |
bccf2150 | 3020 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); |
6aa8b732 AK |
3021 | if (r) |
3022 | goto out; | |
3023 | r = 0; | |
3024 | break; | |
3025 | } | |
3026 | case KVM_DEBUG_GUEST: { | |
3027 | struct kvm_debug_guest dbg; | |
3028 | ||
3029 | r = -EFAULT; | |
2f366987 | 3030 | if (copy_from_user(&dbg, argp, sizeof dbg)) |
6aa8b732 | 3031 | goto out; |
bccf2150 | 3032 | r = kvm_vcpu_ioctl_debug_guest(vcpu, &dbg); |
6aa8b732 AK |
3033 | if (r) |
3034 | goto out; | |
3035 | r = 0; | |
3036 | break; | |
3037 | } | |
bccf2150 | 3038 | case KVM_GET_MSRS: |
35f3f286 | 3039 | r = msr_io(vcpu, argp, kvm_get_msr, 1); |
bccf2150 AK |
3040 | break; |
3041 | case KVM_SET_MSRS: | |
3042 | r = msr_io(vcpu, argp, do_set_msr, 0); | |
3043 | break; | |
06465c5a AK |
3044 | case KVM_SET_CPUID: { |
3045 | struct kvm_cpuid __user *cpuid_arg = argp; | |
3046 | struct kvm_cpuid cpuid; | |
3047 | ||
3048 | r = -EFAULT; | |
3049 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
3050 | goto out; | |
3051 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); | |
3052 | if (r) | |
3053 | goto out; | |
3054 | break; | |
3055 | } | |
1961d276 AK |
3056 | case KVM_SET_SIGNAL_MASK: { |
3057 | struct kvm_signal_mask __user *sigmask_arg = argp; | |
3058 | struct kvm_signal_mask kvm_sigmask; | |
3059 | sigset_t sigset, *p; | |
3060 | ||
3061 | p = NULL; | |
3062 | if (argp) { | |
3063 | r = -EFAULT; | |
3064 | if (copy_from_user(&kvm_sigmask, argp, | |
3065 | sizeof kvm_sigmask)) | |
3066 | goto out; | |
3067 | r = -EINVAL; | |
3068 | if (kvm_sigmask.len != sizeof sigset) | |
3069 | goto out; | |
3070 | r = -EFAULT; | |
3071 | if (copy_from_user(&sigset, sigmask_arg->sigset, | |
3072 | sizeof sigset)) | |
3073 | goto out; | |
3074 | p = &sigset; | |
3075 | } | |
3076 | r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset); | |
3077 | break; | |
3078 | } | |
b8836737 AK |
3079 | case KVM_GET_FPU: { |
3080 | struct kvm_fpu fpu; | |
3081 | ||
3082 | memset(&fpu, 0, sizeof fpu); | |
3083 | r = kvm_vcpu_ioctl_get_fpu(vcpu, &fpu); | |
3084 | if (r) | |
3085 | goto out; | |
3086 | r = -EFAULT; | |
3087 | if (copy_to_user(argp, &fpu, sizeof fpu)) | |
3088 | goto out; | |
3089 | r = 0; | |
3090 | break; | |
3091 | } | |
3092 | case KVM_SET_FPU: { | |
3093 | struct kvm_fpu fpu; | |
3094 | ||
3095 | r = -EFAULT; | |
3096 | if (copy_from_user(&fpu, argp, sizeof fpu)) | |
3097 | goto out; | |
3098 | r = kvm_vcpu_ioctl_set_fpu(vcpu, &fpu); | |
3099 | if (r) | |
3100 | goto out; | |
3101 | r = 0; | |
3102 | break; | |
3103 | } | |
96ad2cc6 ED |
3104 | case KVM_GET_LAPIC: { |
3105 | struct kvm_lapic_state lapic; | |
3106 | ||
3107 | memset(&lapic, 0, sizeof lapic); | |
3108 | r = kvm_vcpu_ioctl_get_lapic(vcpu, &lapic); | |
3109 | if (r) | |
3110 | goto out; | |
3111 | r = -EFAULT; | |
3112 | if (copy_to_user(argp, &lapic, sizeof lapic)) | |
3113 | goto out; | |
3114 | r = 0; | |
3115 | break; | |
3116 | } | |
3117 | case KVM_SET_LAPIC: { | |
3118 | struct kvm_lapic_state lapic; | |
3119 | ||
3120 | r = -EFAULT; | |
3121 | if (copy_from_user(&lapic, argp, sizeof lapic)) | |
3122 | goto out; | |
3123 | r = kvm_vcpu_ioctl_set_lapic(vcpu, &lapic);; | |
3124 | if (r) | |
3125 | goto out; | |
3126 | r = 0; | |
3127 | break; | |
3128 | } | |
bccf2150 AK |
3129 | default: |
3130 | ; | |
3131 | } | |
3132 | out: | |
3133 | return r; | |
3134 | } | |
3135 | ||
3136 | static long kvm_vm_ioctl(struct file *filp, | |
3137 | unsigned int ioctl, unsigned long arg) | |
3138 | { | |
3139 | struct kvm *kvm = filp->private_data; | |
3140 | void __user *argp = (void __user *)arg; | |
3141 | int r = -EINVAL; | |
3142 | ||
3143 | switch (ioctl) { | |
3144 | case KVM_CREATE_VCPU: | |
3145 | r = kvm_vm_ioctl_create_vcpu(kvm, arg); | |
3146 | if (r < 0) | |
3147 | goto out; | |
3148 | break; | |
6aa8b732 AK |
3149 | case KVM_SET_MEMORY_REGION: { |
3150 | struct kvm_memory_region kvm_mem; | |
6fc138d2 | 3151 | struct kvm_userspace_memory_region kvm_userspace_mem; |
6aa8b732 AK |
3152 | |
3153 | r = -EFAULT; | |
2f366987 | 3154 | if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem)) |
6aa8b732 | 3155 | goto out; |
6fc138d2 IE |
3156 | kvm_userspace_mem.slot = kvm_mem.slot; |
3157 | kvm_userspace_mem.flags = kvm_mem.flags; | |
3158 | kvm_userspace_mem.guest_phys_addr = kvm_mem.guest_phys_addr; | |
3159 | kvm_userspace_mem.memory_size = kvm_mem.memory_size; | |
3160 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 0); | |
3161 | if (r) | |
3162 | goto out; | |
3163 | break; | |
3164 | } | |
3165 | case KVM_SET_USER_MEMORY_REGION: { | |
3166 | struct kvm_userspace_memory_region kvm_userspace_mem; | |
3167 | ||
3168 | r = -EFAULT; | |
3169 | if (copy_from_user(&kvm_userspace_mem, argp, | |
3170 | sizeof kvm_userspace_mem)) | |
3171 | goto out; | |
3172 | ||
3173 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 1); | |
6aa8b732 AK |
3174 | if (r) |
3175 | goto out; | |
3176 | break; | |
3177 | } | |
82ce2c96 IE |
3178 | case KVM_SET_NR_MMU_PAGES: |
3179 | r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg); | |
3180 | if (r) | |
3181 | goto out; | |
3182 | break; | |
3183 | case KVM_GET_NR_MMU_PAGES: | |
3184 | r = kvm_vm_ioctl_get_nr_mmu_pages(kvm); | |
3185 | break; | |
6aa8b732 AK |
3186 | case KVM_GET_DIRTY_LOG: { |
3187 | struct kvm_dirty_log log; | |
3188 | ||
3189 | r = -EFAULT; | |
2f366987 | 3190 | if (copy_from_user(&log, argp, sizeof log)) |
6aa8b732 | 3191 | goto out; |
2c6f5df9 | 3192 | r = kvm_vm_ioctl_get_dirty_log(kvm, &log); |
6aa8b732 AK |
3193 | if (r) |
3194 | goto out; | |
3195 | break; | |
3196 | } | |
e8207547 AK |
3197 | case KVM_SET_MEMORY_ALIAS: { |
3198 | struct kvm_memory_alias alias; | |
3199 | ||
3200 | r = -EFAULT; | |
3201 | if (copy_from_user(&alias, argp, sizeof alias)) | |
3202 | goto out; | |
3203 | r = kvm_vm_ioctl_set_memory_alias(kvm, &alias); | |
3204 | if (r) | |
3205 | goto out; | |
3206 | break; | |
3207 | } | |
85f455f7 ED |
3208 | case KVM_CREATE_IRQCHIP: |
3209 | r = -ENOMEM; | |
3210 | kvm->vpic = kvm_create_pic(kvm); | |
1fd4f2a5 ED |
3211 | if (kvm->vpic) { |
3212 | r = kvm_ioapic_init(kvm); | |
3213 | if (r) { | |
3214 | kfree(kvm->vpic); | |
3215 | kvm->vpic = NULL; | |
3216 | goto out; | |
3217 | } | |
d77c26fc | 3218 | } else |
85f455f7 ED |
3219 | goto out; |
3220 | break; | |
3221 | case KVM_IRQ_LINE: { | |
3222 | struct kvm_irq_level irq_event; | |
3223 | ||
3224 | r = -EFAULT; | |
3225 | if (copy_from_user(&irq_event, argp, sizeof irq_event)) | |
3226 | goto out; | |
3227 | if (irqchip_in_kernel(kvm)) { | |
9cf98828 | 3228 | mutex_lock(&kvm->lock); |
85f455f7 ED |
3229 | if (irq_event.irq < 16) |
3230 | kvm_pic_set_irq(pic_irqchip(kvm), | |
3231 | irq_event.irq, | |
3232 | irq_event.level); | |
1fd4f2a5 ED |
3233 | kvm_ioapic_set_irq(kvm->vioapic, |
3234 | irq_event.irq, | |
3235 | irq_event.level); | |
9cf98828 | 3236 | mutex_unlock(&kvm->lock); |
85f455f7 ED |
3237 | r = 0; |
3238 | } | |
3239 | break; | |
3240 | } | |
6ceb9d79 HQ |
3241 | case KVM_GET_IRQCHIP: { |
3242 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
3243 | struct kvm_irqchip chip; | |
3244 | ||
3245 | r = -EFAULT; | |
3246 | if (copy_from_user(&chip, argp, sizeof chip)) | |
3247 | goto out; | |
3248 | r = -ENXIO; | |
3249 | if (!irqchip_in_kernel(kvm)) | |
3250 | goto out; | |
3251 | r = kvm_vm_ioctl_get_irqchip(kvm, &chip); | |
3252 | if (r) | |
3253 | goto out; | |
3254 | r = -EFAULT; | |
3255 | if (copy_to_user(argp, &chip, sizeof chip)) | |
3256 | goto out; | |
3257 | r = 0; | |
3258 | break; | |
3259 | } | |
3260 | case KVM_SET_IRQCHIP: { | |
3261 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
3262 | struct kvm_irqchip chip; | |
3263 | ||
3264 | r = -EFAULT; | |
3265 | if (copy_from_user(&chip, argp, sizeof chip)) | |
3266 | goto out; | |
3267 | r = -ENXIO; | |
3268 | if (!irqchip_in_kernel(kvm)) | |
3269 | goto out; | |
3270 | r = kvm_vm_ioctl_set_irqchip(kvm, &chip); | |
3271 | if (r) | |
3272 | goto out; | |
3273 | r = 0; | |
3274 | break; | |
3275 | } | |
f17abe9a AK |
3276 | default: |
3277 | ; | |
3278 | } | |
3279 | out: | |
3280 | return r; | |
3281 | } | |
3282 | ||
3283 | static struct page *kvm_vm_nopage(struct vm_area_struct *vma, | |
3284 | unsigned long address, | |
3285 | int *type) | |
3286 | { | |
3287 | struct kvm *kvm = vma->vm_file->private_data; | |
3288 | unsigned long pgoff; | |
f17abe9a AK |
3289 | struct page *page; |
3290 | ||
f17abe9a | 3291 | pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff; |
954bbbc2 | 3292 | page = gfn_to_page(kvm, pgoff); |
f17abe9a AK |
3293 | if (!page) |
3294 | return NOPAGE_SIGBUS; | |
3295 | get_page(page); | |
cd0d9137 NAQ |
3296 | if (type != NULL) |
3297 | *type = VM_FAULT_MINOR; | |
3298 | ||
f17abe9a AK |
3299 | return page; |
3300 | } | |
3301 | ||
3302 | static struct vm_operations_struct kvm_vm_vm_ops = { | |
3303 | .nopage = kvm_vm_nopage, | |
3304 | }; | |
3305 | ||
3306 | static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma) | |
3307 | { | |
3308 | vma->vm_ops = &kvm_vm_vm_ops; | |
3309 | return 0; | |
3310 | } | |
3311 | ||
3312 | static struct file_operations kvm_vm_fops = { | |
3313 | .release = kvm_vm_release, | |
3314 | .unlocked_ioctl = kvm_vm_ioctl, | |
3315 | .compat_ioctl = kvm_vm_ioctl, | |
3316 | .mmap = kvm_vm_mmap, | |
3317 | }; | |
3318 | ||
3319 | static int kvm_dev_ioctl_create_vm(void) | |
3320 | { | |
3321 | int fd, r; | |
3322 | struct inode *inode; | |
3323 | struct file *file; | |
3324 | struct kvm *kvm; | |
3325 | ||
f17abe9a | 3326 | kvm = kvm_create_vm(); |
d6d28168 AK |
3327 | if (IS_ERR(kvm)) |
3328 | return PTR_ERR(kvm); | |
3329 | r = anon_inode_getfd(&fd, &inode, &file, "kvm-vm", &kvm_vm_fops, kvm); | |
3330 | if (r) { | |
3331 | kvm_destroy_vm(kvm); | |
3332 | return r; | |
f17abe9a AK |
3333 | } |
3334 | ||
bccf2150 | 3335 | kvm->filp = file; |
f17abe9a | 3336 | |
f17abe9a | 3337 | return fd; |
f17abe9a AK |
3338 | } |
3339 | ||
3340 | static long kvm_dev_ioctl(struct file *filp, | |
3341 | unsigned int ioctl, unsigned long arg) | |
3342 | { | |
3343 | void __user *argp = (void __user *)arg; | |
07c45a36 | 3344 | long r = -EINVAL; |
f17abe9a AK |
3345 | |
3346 | switch (ioctl) { | |
3347 | case KVM_GET_API_VERSION: | |
f0fe5108 AK |
3348 | r = -EINVAL; |
3349 | if (arg) | |
3350 | goto out; | |
f17abe9a AK |
3351 | r = KVM_API_VERSION; |
3352 | break; | |
3353 | case KVM_CREATE_VM: | |
f0fe5108 AK |
3354 | r = -EINVAL; |
3355 | if (arg) | |
3356 | goto out; | |
f17abe9a AK |
3357 | r = kvm_dev_ioctl_create_vm(); |
3358 | break; | |
6aa8b732 | 3359 | case KVM_GET_MSR_INDEX_LIST: { |
2f366987 | 3360 | struct kvm_msr_list __user *user_msr_list = argp; |
6aa8b732 AK |
3361 | struct kvm_msr_list msr_list; |
3362 | unsigned n; | |
3363 | ||
3364 | r = -EFAULT; | |
3365 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) | |
3366 | goto out; | |
3367 | n = msr_list.nmsrs; | |
6f00e68f | 3368 | msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs); |
6aa8b732 AK |
3369 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) |
3370 | goto out; | |
3371 | r = -E2BIG; | |
bf591b24 | 3372 | if (n < num_msrs_to_save) |
6aa8b732 AK |
3373 | goto out; |
3374 | r = -EFAULT; | |
3375 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, | |
bf591b24 | 3376 | num_msrs_to_save * sizeof(u32))) |
6aa8b732 | 3377 | goto out; |
6f00e68f AK |
3378 | if (copy_to_user(user_msr_list->indices |
3379 | + num_msrs_to_save * sizeof(u32), | |
3380 | &emulated_msrs, | |
3381 | ARRAY_SIZE(emulated_msrs) * sizeof(u32))) | |
3382 | goto out; | |
6aa8b732 | 3383 | r = 0; |
cc1d8955 | 3384 | break; |
6aa8b732 | 3385 | } |
85f455f7 ED |
3386 | case KVM_CHECK_EXTENSION: { |
3387 | int ext = (long)argp; | |
3388 | ||
3389 | switch (ext) { | |
3390 | case KVM_CAP_IRQCHIP: | |
b6958ce4 | 3391 | case KVM_CAP_HLT: |
82ce2c96 | 3392 | case KVM_CAP_MMU_SHADOW_CACHE_CONTROL: |
6fc138d2 | 3393 | case KVM_CAP_USER_MEMORY: |
85f455f7 ED |
3394 | r = 1; |
3395 | break; | |
3396 | default: | |
3397 | r = 0; | |
3398 | break; | |
3399 | } | |
5d308f45 | 3400 | break; |
85f455f7 | 3401 | } |
07c45a36 AK |
3402 | case KVM_GET_VCPU_MMAP_SIZE: |
3403 | r = -EINVAL; | |
3404 | if (arg) | |
3405 | goto out; | |
039576c0 | 3406 | r = 2 * PAGE_SIZE; |
07c45a36 | 3407 | break; |
6aa8b732 AK |
3408 | default: |
3409 | ; | |
3410 | } | |
3411 | out: | |
3412 | return r; | |
3413 | } | |
3414 | ||
6aa8b732 | 3415 | static struct file_operations kvm_chardev_ops = { |
6aa8b732 AK |
3416 | .unlocked_ioctl = kvm_dev_ioctl, |
3417 | .compat_ioctl = kvm_dev_ioctl, | |
6aa8b732 AK |
3418 | }; |
3419 | ||
3420 | static struct miscdevice kvm_dev = { | |
bbe4432e | 3421 | KVM_MINOR, |
6aa8b732 AK |
3422 | "kvm", |
3423 | &kvm_chardev_ops, | |
3424 | }; | |
3425 | ||
774c47f1 AK |
3426 | /* |
3427 | * Make sure that a cpu that is being hot-unplugged does not have any vcpus | |
3428 | * cached on it. | |
3429 | */ | |
3430 | static void decache_vcpus_on_cpu(int cpu) | |
3431 | { | |
3432 | struct kvm *vm; | |
3433 | struct kvm_vcpu *vcpu; | |
3434 | int i; | |
3435 | ||
3436 | spin_lock(&kvm_lock); | |
11ec2804 | 3437 | list_for_each_entry(vm, &vm_list, vm_list) |
774c47f1 | 3438 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
fb3f0f51 RR |
3439 | vcpu = vm->vcpus[i]; |
3440 | if (!vcpu) | |
3441 | continue; | |
774c47f1 AK |
3442 | /* |
3443 | * If the vcpu is locked, then it is running on some | |
3444 | * other cpu and therefore it is not cached on the | |
3445 | * cpu in question. | |
3446 | * | |
3447 | * If it's not locked, check the last cpu it executed | |
3448 | * on. | |
3449 | */ | |
3450 | if (mutex_trylock(&vcpu->mutex)) { | |
3451 | if (vcpu->cpu == cpu) { | |
cbdd1bea | 3452 | kvm_x86_ops->vcpu_decache(vcpu); |
774c47f1 AK |
3453 | vcpu->cpu = -1; |
3454 | } | |
3455 | mutex_unlock(&vcpu->mutex); | |
3456 | } | |
3457 | } | |
3458 | spin_unlock(&kvm_lock); | |
3459 | } | |
3460 | ||
1b6c0168 AK |
3461 | static void hardware_enable(void *junk) |
3462 | { | |
3463 | int cpu = raw_smp_processor_id(); | |
3464 | ||
3465 | if (cpu_isset(cpu, cpus_hardware_enabled)) | |
3466 | return; | |
3467 | cpu_set(cpu, cpus_hardware_enabled); | |
cbdd1bea | 3468 | kvm_x86_ops->hardware_enable(NULL); |
1b6c0168 AK |
3469 | } |
3470 | ||
3471 | static void hardware_disable(void *junk) | |
3472 | { | |
3473 | int cpu = raw_smp_processor_id(); | |
3474 | ||
3475 | if (!cpu_isset(cpu, cpus_hardware_enabled)) | |
3476 | return; | |
3477 | cpu_clear(cpu, cpus_hardware_enabled); | |
3478 | decache_vcpus_on_cpu(cpu); | |
cbdd1bea | 3479 | kvm_x86_ops->hardware_disable(NULL); |
1b6c0168 AK |
3480 | } |
3481 | ||
774c47f1 AK |
3482 | static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val, |
3483 | void *v) | |
3484 | { | |
3485 | int cpu = (long)v; | |
3486 | ||
3487 | switch (val) { | |
cec9ad27 AK |
3488 | case CPU_DYING: |
3489 | case CPU_DYING_FROZEN: | |
6ec8a856 AK |
3490 | printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n", |
3491 | cpu); | |
3492 | hardware_disable(NULL); | |
3493 | break; | |
774c47f1 | 3494 | case CPU_UP_CANCELED: |
8bb78442 | 3495 | case CPU_UP_CANCELED_FROZEN: |
43934a38 JK |
3496 | printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n", |
3497 | cpu); | |
1b6c0168 | 3498 | smp_call_function_single(cpu, hardware_disable, NULL, 0, 1); |
774c47f1 | 3499 | break; |
43934a38 | 3500 | case CPU_ONLINE: |
8bb78442 | 3501 | case CPU_ONLINE_FROZEN: |
43934a38 JK |
3502 | printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n", |
3503 | cpu); | |
1b6c0168 | 3504 | smp_call_function_single(cpu, hardware_enable, NULL, 0, 1); |
774c47f1 AK |
3505 | break; |
3506 | } | |
3507 | return NOTIFY_OK; | |
3508 | } | |
3509 | ||
9a2b85c6 | 3510 | static int kvm_reboot(struct notifier_block *notifier, unsigned long val, |
d77c26fc | 3511 | void *v) |
9a2b85c6 RR |
3512 | { |
3513 | if (val == SYS_RESTART) { | |
3514 | /* | |
3515 | * Some (well, at least mine) BIOSes hang on reboot if | |
3516 | * in vmx root mode. | |
3517 | */ | |
3518 | printk(KERN_INFO "kvm: exiting hardware virtualization\n"); | |
3519 | on_each_cpu(hardware_disable, NULL, 0, 1); | |
3520 | } | |
3521 | return NOTIFY_OK; | |
3522 | } | |
3523 | ||
3524 | static struct notifier_block kvm_reboot_notifier = { | |
3525 | .notifier_call = kvm_reboot, | |
3526 | .priority = 0, | |
3527 | }; | |
3528 | ||
2eeb2e94 GH |
3529 | void kvm_io_bus_init(struct kvm_io_bus *bus) |
3530 | { | |
3531 | memset(bus, 0, sizeof(*bus)); | |
3532 | } | |
3533 | ||
3534 | void kvm_io_bus_destroy(struct kvm_io_bus *bus) | |
3535 | { | |
3536 | int i; | |
3537 | ||
3538 | for (i = 0; i < bus->dev_count; i++) { | |
3539 | struct kvm_io_device *pos = bus->devs[i]; | |
3540 | ||
3541 | kvm_iodevice_destructor(pos); | |
3542 | } | |
3543 | } | |
3544 | ||
3545 | struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr) | |
3546 | { | |
3547 | int i; | |
3548 | ||
3549 | for (i = 0; i < bus->dev_count; i++) { | |
3550 | struct kvm_io_device *pos = bus->devs[i]; | |
3551 | ||
3552 | if (pos->in_range(pos, addr)) | |
3553 | return pos; | |
3554 | } | |
3555 | ||
3556 | return NULL; | |
3557 | } | |
3558 | ||
3559 | void kvm_io_bus_register_dev(struct kvm_io_bus *bus, struct kvm_io_device *dev) | |
3560 | { | |
3561 | BUG_ON(bus->dev_count > (NR_IOBUS_DEVS-1)); | |
3562 | ||
3563 | bus->devs[bus->dev_count++] = dev; | |
3564 | } | |
3565 | ||
774c47f1 AK |
3566 | static struct notifier_block kvm_cpu_notifier = { |
3567 | .notifier_call = kvm_cpu_hotplug, | |
3568 | .priority = 20, /* must be > scheduler priority */ | |
3569 | }; | |
3570 | ||
1165f5fe AK |
3571 | static u64 stat_get(void *_offset) |
3572 | { | |
3573 | unsigned offset = (long)_offset; | |
3574 | u64 total = 0; | |
3575 | struct kvm *kvm; | |
3576 | struct kvm_vcpu *vcpu; | |
3577 | int i; | |
3578 | ||
3579 | spin_lock(&kvm_lock); | |
3580 | list_for_each_entry(kvm, &vm_list, vm_list) | |
3581 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
fb3f0f51 RR |
3582 | vcpu = kvm->vcpus[i]; |
3583 | if (vcpu) | |
3584 | total += *(u32 *)((void *)vcpu + offset); | |
1165f5fe AK |
3585 | } |
3586 | spin_unlock(&kvm_lock); | |
3587 | return total; | |
3588 | } | |
3589 | ||
3dea7ca7 | 3590 | DEFINE_SIMPLE_ATTRIBUTE(stat_fops, stat_get, NULL, "%llu\n"); |
1165f5fe | 3591 | |
6aa8b732 AK |
3592 | static __init void kvm_init_debug(void) |
3593 | { | |
3594 | struct kvm_stats_debugfs_item *p; | |
3595 | ||
8b6d44c7 | 3596 | debugfs_dir = debugfs_create_dir("kvm", NULL); |
6aa8b732 | 3597 | for (p = debugfs_entries; p->name; ++p) |
1165f5fe AK |
3598 | p->dentry = debugfs_create_file(p->name, 0444, debugfs_dir, |
3599 | (void *)(long)p->offset, | |
3600 | &stat_fops); | |
6aa8b732 AK |
3601 | } |
3602 | ||
3603 | static void kvm_exit_debug(void) | |
3604 | { | |
3605 | struct kvm_stats_debugfs_item *p; | |
3606 | ||
3607 | for (p = debugfs_entries; p->name; ++p) | |
3608 | debugfs_remove(p->dentry); | |
3609 | debugfs_remove(debugfs_dir); | |
3610 | } | |
3611 | ||
59ae6c6b AK |
3612 | static int kvm_suspend(struct sys_device *dev, pm_message_t state) |
3613 | { | |
4267c41a | 3614 | hardware_disable(NULL); |
59ae6c6b AK |
3615 | return 0; |
3616 | } | |
3617 | ||
3618 | static int kvm_resume(struct sys_device *dev) | |
3619 | { | |
4267c41a | 3620 | hardware_enable(NULL); |
59ae6c6b AK |
3621 | return 0; |
3622 | } | |
3623 | ||
3624 | static struct sysdev_class kvm_sysdev_class = { | |
af5ca3f4 | 3625 | .name = "kvm", |
59ae6c6b AK |
3626 | .suspend = kvm_suspend, |
3627 | .resume = kvm_resume, | |
3628 | }; | |
3629 | ||
3630 | static struct sys_device kvm_sysdev = { | |
3631 | .id = 0, | |
3632 | .cls = &kvm_sysdev_class, | |
3633 | }; | |
3634 | ||
6aa8b732 AK |
3635 | hpa_t bad_page_address; |
3636 | ||
15ad7146 AK |
3637 | static inline |
3638 | struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn) | |
3639 | { | |
3640 | return container_of(pn, struct kvm_vcpu, preempt_notifier); | |
3641 | } | |
3642 | ||
3643 | static void kvm_sched_in(struct preempt_notifier *pn, int cpu) | |
3644 | { | |
3645 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); | |
3646 | ||
cbdd1bea | 3647 | kvm_x86_ops->vcpu_load(vcpu, cpu); |
15ad7146 AK |
3648 | } |
3649 | ||
3650 | static void kvm_sched_out(struct preempt_notifier *pn, | |
3651 | struct task_struct *next) | |
3652 | { | |
3653 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); | |
3654 | ||
cbdd1bea | 3655 | kvm_x86_ops->vcpu_put(vcpu); |
15ad7146 AK |
3656 | } |
3657 | ||
cbdd1bea | 3658 | int kvm_init_x86(struct kvm_x86_ops *ops, unsigned int vcpu_size, |
c16f862d | 3659 | struct module *module) |
6aa8b732 AK |
3660 | { |
3661 | int r; | |
002c7f7c | 3662 | int cpu; |
6aa8b732 | 3663 | |
cbdd1bea | 3664 | if (kvm_x86_ops) { |
09db28b8 YI |
3665 | printk(KERN_ERR "kvm: already loaded the other module\n"); |
3666 | return -EEXIST; | |
3667 | } | |
3668 | ||
e097f35c | 3669 | if (!ops->cpu_has_kvm_support()) { |
6aa8b732 AK |
3670 | printk(KERN_ERR "kvm: no hardware support\n"); |
3671 | return -EOPNOTSUPP; | |
3672 | } | |
e097f35c | 3673 | if (ops->disabled_by_bios()) { |
6aa8b732 AK |
3674 | printk(KERN_ERR "kvm: disabled by bios\n"); |
3675 | return -EOPNOTSUPP; | |
3676 | } | |
3677 | ||
cbdd1bea | 3678 | kvm_x86_ops = ops; |
e097f35c | 3679 | |
cbdd1bea | 3680 | r = kvm_x86_ops->hardware_setup(); |
6aa8b732 | 3681 | if (r < 0) |
ca45aaae | 3682 | goto out; |
6aa8b732 | 3683 | |
002c7f7c YS |
3684 | for_each_online_cpu(cpu) { |
3685 | smp_call_function_single(cpu, | |
cbdd1bea | 3686 | kvm_x86_ops->check_processor_compatibility, |
002c7f7c YS |
3687 | &r, 0, 1); |
3688 | if (r < 0) | |
3689 | goto out_free_0; | |
3690 | } | |
3691 | ||
1b6c0168 | 3692 | on_each_cpu(hardware_enable, NULL, 0, 1); |
774c47f1 AK |
3693 | r = register_cpu_notifier(&kvm_cpu_notifier); |
3694 | if (r) | |
3695 | goto out_free_1; | |
6aa8b732 AK |
3696 | register_reboot_notifier(&kvm_reboot_notifier); |
3697 | ||
59ae6c6b AK |
3698 | r = sysdev_class_register(&kvm_sysdev_class); |
3699 | if (r) | |
3700 | goto out_free_2; | |
3701 | ||
3702 | r = sysdev_register(&kvm_sysdev); | |
3703 | if (r) | |
3704 | goto out_free_3; | |
3705 | ||
c16f862d RR |
3706 | /* A kmem cache lets us meet the alignment requirements of fx_save. */ |
3707 | kvm_vcpu_cache = kmem_cache_create("kvm_vcpu", vcpu_size, | |
3708 | __alignof__(struct kvm_vcpu), 0, 0); | |
3709 | if (!kvm_vcpu_cache) { | |
3710 | r = -ENOMEM; | |
3711 | goto out_free_4; | |
3712 | } | |
3713 | ||
6aa8b732 AK |
3714 | kvm_chardev_ops.owner = module; |
3715 | ||
3716 | r = misc_register(&kvm_dev); | |
3717 | if (r) { | |
d77c26fc | 3718 | printk(KERN_ERR "kvm: misc device register failed\n"); |
6aa8b732 AK |
3719 | goto out_free; |
3720 | } | |
3721 | ||
15ad7146 AK |
3722 | kvm_preempt_ops.sched_in = kvm_sched_in; |
3723 | kvm_preempt_ops.sched_out = kvm_sched_out; | |
3724 | ||
c7addb90 AK |
3725 | kvm_mmu_set_nonpresent_ptes(0ull, 0ull); |
3726 | ||
3727 | return 0; | |
6aa8b732 AK |
3728 | |
3729 | out_free: | |
c16f862d RR |
3730 | kmem_cache_destroy(kvm_vcpu_cache); |
3731 | out_free_4: | |
59ae6c6b AK |
3732 | sysdev_unregister(&kvm_sysdev); |
3733 | out_free_3: | |
3734 | sysdev_class_unregister(&kvm_sysdev_class); | |
3735 | out_free_2: | |
6aa8b732 | 3736 | unregister_reboot_notifier(&kvm_reboot_notifier); |
774c47f1 AK |
3737 | unregister_cpu_notifier(&kvm_cpu_notifier); |
3738 | out_free_1: | |
1b6c0168 | 3739 | on_each_cpu(hardware_disable, NULL, 0, 1); |
002c7f7c | 3740 | out_free_0: |
cbdd1bea | 3741 | kvm_x86_ops->hardware_unsetup(); |
ca45aaae | 3742 | out: |
cbdd1bea | 3743 | kvm_x86_ops = NULL; |
6aa8b732 AK |
3744 | return r; |
3745 | } | |
d77c26fc | 3746 | EXPORT_SYMBOL_GPL(kvm_init_x86); |
6aa8b732 | 3747 | |
cbdd1bea | 3748 | void kvm_exit_x86(void) |
6aa8b732 AK |
3749 | { |
3750 | misc_deregister(&kvm_dev); | |
c16f862d | 3751 | kmem_cache_destroy(kvm_vcpu_cache); |
59ae6c6b AK |
3752 | sysdev_unregister(&kvm_sysdev); |
3753 | sysdev_class_unregister(&kvm_sysdev_class); | |
6aa8b732 | 3754 | unregister_reboot_notifier(&kvm_reboot_notifier); |
59ae6c6b | 3755 | unregister_cpu_notifier(&kvm_cpu_notifier); |
1b6c0168 | 3756 | on_each_cpu(hardware_disable, NULL, 0, 1); |
cbdd1bea CE |
3757 | kvm_x86_ops->hardware_unsetup(); |
3758 | kvm_x86_ops = NULL; | |
6aa8b732 | 3759 | } |
d77c26fc | 3760 | EXPORT_SYMBOL_GPL(kvm_exit_x86); |
6aa8b732 AK |
3761 | |
3762 | static __init int kvm_init(void) | |
3763 | { | |
3764 | static struct page *bad_page; | |
37e29d90 AK |
3765 | int r; |
3766 | ||
b5a33a75 AK |
3767 | r = kvm_mmu_module_init(); |
3768 | if (r) | |
3769 | goto out4; | |
3770 | ||
6aa8b732 AK |
3771 | kvm_init_debug(); |
3772 | ||
bf591b24 MR |
3773 | kvm_init_msr_list(); |
3774 | ||
d77c26fc MD |
3775 | bad_page = alloc_page(GFP_KERNEL); |
3776 | ||
3777 | if (bad_page == NULL) { | |
6aa8b732 AK |
3778 | r = -ENOMEM; |
3779 | goto out; | |
3780 | } | |
3781 | ||
3782 | bad_page_address = page_to_pfn(bad_page) << PAGE_SHIFT; | |
3783 | memset(__va(bad_page_address), 0, PAGE_SIZE); | |
3784 | ||
58e690e6 | 3785 | return 0; |
6aa8b732 AK |
3786 | |
3787 | out: | |
3788 | kvm_exit_debug(); | |
b5a33a75 AK |
3789 | kvm_mmu_module_exit(); |
3790 | out4: | |
6aa8b732 AK |
3791 | return r; |
3792 | } | |
3793 | ||
3794 | static __exit void kvm_exit(void) | |
3795 | { | |
3796 | kvm_exit_debug(); | |
3797 | __free_page(pfn_to_page(bad_page_address >> PAGE_SHIFT)); | |
b5a33a75 | 3798 | kvm_mmu_module_exit(); |
6aa8b732 AK |
3799 | } |
3800 | ||
3801 | module_init(kvm_init) | |
3802 | module_exit(kvm_exit) |