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" | |
6aa8b732 AK |
21 | |
22 | #include <linux/kvm.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/errno.h> | |
6aa8b732 AK |
25 | #include <linux/percpu.h> |
26 | #include <linux/gfp.h> | |
6aa8b732 AK |
27 | #include <linux/mm.h> |
28 | #include <linux/miscdevice.h> | |
29 | #include <linux/vmalloc.h> | |
6aa8b732 | 30 | #include <linux/reboot.h> |
6aa8b732 AK |
31 | #include <linux/debugfs.h> |
32 | #include <linux/highmem.h> | |
33 | #include <linux/file.h> | |
59ae6c6b | 34 | #include <linux/sysdev.h> |
774c47f1 | 35 | #include <linux/cpu.h> |
e8edc6e0 | 36 | #include <linux/sched.h> |
d9e368d6 AK |
37 | #include <linux/cpumask.h> |
38 | #include <linux/smp.h> | |
d6d28168 | 39 | #include <linux/anon_inodes.h> |
6aa8b732 | 40 | |
e495606d AK |
41 | #include <asm/processor.h> |
42 | #include <asm/msr.h> | |
43 | #include <asm/io.h> | |
44 | #include <asm/uaccess.h> | |
45 | #include <asm/desc.h> | |
6aa8b732 AK |
46 | |
47 | MODULE_AUTHOR("Qumranet"); | |
48 | MODULE_LICENSE("GPL"); | |
49 | ||
133de902 AK |
50 | static DEFINE_SPINLOCK(kvm_lock); |
51 | static LIST_HEAD(vm_list); | |
52 | ||
1b6c0168 AK |
53 | static cpumask_t cpus_hardware_enabled; |
54 | ||
6aa8b732 | 55 | struct kvm_arch_ops *kvm_arch_ops; |
1165f5fe | 56 | |
15ad7146 AK |
57 | static __read_mostly struct preempt_ops kvm_preempt_ops; |
58 | ||
1165f5fe | 59 | #define STAT_OFFSET(x) offsetof(struct kvm_vcpu, stat.x) |
6aa8b732 AK |
60 | |
61 | static struct kvm_stats_debugfs_item { | |
62 | const char *name; | |
1165f5fe | 63 | int offset; |
6aa8b732 AK |
64 | struct dentry *dentry; |
65 | } debugfs_entries[] = { | |
1165f5fe AK |
66 | { "pf_fixed", STAT_OFFSET(pf_fixed) }, |
67 | { "pf_guest", STAT_OFFSET(pf_guest) }, | |
68 | { "tlb_flush", STAT_OFFSET(tlb_flush) }, | |
69 | { "invlpg", STAT_OFFSET(invlpg) }, | |
70 | { "exits", STAT_OFFSET(exits) }, | |
71 | { "io_exits", STAT_OFFSET(io_exits) }, | |
72 | { "mmio_exits", STAT_OFFSET(mmio_exits) }, | |
73 | { "signal_exits", STAT_OFFSET(signal_exits) }, | |
74 | { "irq_window", STAT_OFFSET(irq_window_exits) }, | |
75 | { "halt_exits", STAT_OFFSET(halt_exits) }, | |
76 | { "request_irq", STAT_OFFSET(request_irq_exits) }, | |
77 | { "irq_exits", STAT_OFFSET(irq_exits) }, | |
e6adf283 | 78 | { "light_exits", STAT_OFFSET(light_exits) }, |
2cc51560 | 79 | { "efer_reload", STAT_OFFSET(efer_reload) }, |
1165f5fe | 80 | { NULL } |
6aa8b732 AK |
81 | }; |
82 | ||
83 | static struct dentry *debugfs_dir; | |
84 | ||
85 | #define MAX_IO_MSRS 256 | |
86 | ||
707d92fa RR |
87 | #define CR0_RESERVED_BITS \ |
88 | (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \ | |
89 | | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \ | |
90 | | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG)) | |
66aee91a RR |
91 | #define CR4_RESERVED_BITS \ |
92 | (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\ | |
93 | | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \ | |
94 | | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \ | |
95 | | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE)) | |
96 | ||
7075bc81 | 97 | #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR) |
6aa8b732 AK |
98 | #define EFER_RESERVED_BITS 0xfffffffffffff2fe |
99 | ||
05b3e0c2 | 100 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
101 | // LDT or TSS descriptor in the GDT. 16 bytes. |
102 | struct segment_descriptor_64 { | |
103 | struct segment_descriptor s; | |
104 | u32 base_higher; | |
105 | u32 pad_zero; | |
106 | }; | |
107 | ||
108 | #endif | |
109 | ||
bccf2150 AK |
110 | static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl, |
111 | unsigned long arg); | |
112 | ||
6aa8b732 AK |
113 | unsigned long segment_base(u16 selector) |
114 | { | |
115 | struct descriptor_table gdt; | |
116 | struct segment_descriptor *d; | |
117 | unsigned long table_base; | |
118 | typedef unsigned long ul; | |
119 | unsigned long v; | |
120 | ||
121 | if (selector == 0) | |
122 | return 0; | |
123 | ||
124 | asm ("sgdt %0" : "=m"(gdt)); | |
125 | table_base = gdt.base; | |
126 | ||
127 | if (selector & 4) { /* from ldt */ | |
128 | u16 ldt_selector; | |
129 | ||
130 | asm ("sldt %0" : "=g"(ldt_selector)); | |
131 | table_base = segment_base(ldt_selector); | |
132 | } | |
133 | d = (struct segment_descriptor *)(table_base + (selector & ~7)); | |
134 | v = d->base_low | ((ul)d->base_mid << 16) | ((ul)d->base_high << 24); | |
05b3e0c2 | 135 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
136 | if (d->system == 0 |
137 | && (d->type == 2 || d->type == 9 || d->type == 11)) | |
138 | v |= ((ul)((struct segment_descriptor_64 *)d)->base_higher) << 32; | |
139 | #endif | |
140 | return v; | |
141 | } | |
142 | EXPORT_SYMBOL_GPL(segment_base); | |
143 | ||
5aacf0ca JM |
144 | static inline int valid_vcpu(int n) |
145 | { | |
146 | return likely(n >= 0 && n < KVM_MAX_VCPUS); | |
147 | } | |
148 | ||
d27d4aca AK |
149 | int kvm_read_guest(struct kvm_vcpu *vcpu, gva_t addr, unsigned long size, |
150 | void *dest) | |
6aa8b732 AK |
151 | { |
152 | unsigned char *host_buf = dest; | |
153 | unsigned long req_size = size; | |
154 | ||
155 | while (size) { | |
156 | hpa_t paddr; | |
157 | unsigned now; | |
158 | unsigned offset; | |
159 | hva_t guest_buf; | |
160 | ||
161 | paddr = gva_to_hpa(vcpu, addr); | |
162 | ||
163 | if (is_error_hpa(paddr)) | |
164 | break; | |
165 | ||
166 | guest_buf = (hva_t)kmap_atomic( | |
167 | pfn_to_page(paddr >> PAGE_SHIFT), | |
168 | KM_USER0); | |
169 | offset = addr & ~PAGE_MASK; | |
170 | guest_buf |= offset; | |
171 | now = min(size, PAGE_SIZE - offset); | |
172 | memcpy(host_buf, (void*)guest_buf, now); | |
173 | host_buf += now; | |
174 | addr += now; | |
175 | size -= now; | |
176 | kunmap_atomic((void *)(guest_buf & PAGE_MASK), KM_USER0); | |
177 | } | |
178 | return req_size - size; | |
179 | } | |
180 | EXPORT_SYMBOL_GPL(kvm_read_guest); | |
181 | ||
d27d4aca AK |
182 | int kvm_write_guest(struct kvm_vcpu *vcpu, gva_t addr, unsigned long size, |
183 | void *data) | |
6aa8b732 AK |
184 | { |
185 | unsigned char *host_buf = data; | |
186 | unsigned long req_size = size; | |
187 | ||
188 | while (size) { | |
189 | hpa_t paddr; | |
190 | unsigned now; | |
191 | unsigned offset; | |
192 | hva_t guest_buf; | |
ab51a434 | 193 | gfn_t gfn; |
6aa8b732 AK |
194 | |
195 | paddr = gva_to_hpa(vcpu, addr); | |
196 | ||
197 | if (is_error_hpa(paddr)) | |
198 | break; | |
199 | ||
ab51a434 UL |
200 | gfn = vcpu->mmu.gva_to_gpa(vcpu, addr) >> PAGE_SHIFT; |
201 | mark_page_dirty(vcpu->kvm, gfn); | |
6aa8b732 AK |
202 | guest_buf = (hva_t)kmap_atomic( |
203 | pfn_to_page(paddr >> PAGE_SHIFT), KM_USER0); | |
204 | offset = addr & ~PAGE_MASK; | |
205 | guest_buf |= offset; | |
206 | now = min(size, PAGE_SIZE - offset); | |
207 | memcpy((void*)guest_buf, host_buf, now); | |
208 | host_buf += now; | |
209 | addr += now; | |
210 | size -= now; | |
211 | kunmap_atomic((void *)(guest_buf & PAGE_MASK), KM_USER0); | |
212 | } | |
213 | return req_size - size; | |
214 | } | |
215 | EXPORT_SYMBOL_GPL(kvm_write_guest); | |
216 | ||
7702fd1f AK |
217 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) |
218 | { | |
219 | if (!vcpu->fpu_active || vcpu->guest_fpu_loaded) | |
220 | return; | |
221 | ||
222 | vcpu->guest_fpu_loaded = 1; | |
223 | fx_save(vcpu->host_fx_image); | |
224 | fx_restore(vcpu->guest_fx_image); | |
225 | } | |
226 | EXPORT_SYMBOL_GPL(kvm_load_guest_fpu); | |
227 | ||
228 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) | |
229 | { | |
230 | if (!vcpu->guest_fpu_loaded) | |
231 | return; | |
232 | ||
233 | vcpu->guest_fpu_loaded = 0; | |
234 | fx_save(vcpu->guest_fx_image); | |
235 | fx_restore(vcpu->host_fx_image); | |
236 | } | |
237 | EXPORT_SYMBOL_GPL(kvm_put_guest_fpu); | |
238 | ||
bccf2150 AK |
239 | /* |
240 | * Switches to specified vcpu, until a matching vcpu_put() | |
241 | */ | |
242 | static void vcpu_load(struct kvm_vcpu *vcpu) | |
6aa8b732 | 243 | { |
15ad7146 AK |
244 | int cpu; |
245 | ||
bccf2150 | 246 | mutex_lock(&vcpu->mutex); |
15ad7146 AK |
247 | cpu = get_cpu(); |
248 | preempt_notifier_register(&vcpu->preempt_notifier); | |
249 | kvm_arch_ops->vcpu_load(vcpu, cpu); | |
250 | put_cpu(); | |
6aa8b732 AK |
251 | } |
252 | ||
6aa8b732 AK |
253 | static void vcpu_put(struct kvm_vcpu *vcpu) |
254 | { | |
15ad7146 | 255 | preempt_disable(); |
6aa8b732 | 256 | kvm_arch_ops->vcpu_put(vcpu); |
15ad7146 AK |
257 | preempt_notifier_unregister(&vcpu->preempt_notifier); |
258 | preempt_enable(); | |
6aa8b732 AK |
259 | mutex_unlock(&vcpu->mutex); |
260 | } | |
261 | ||
d9e368d6 AK |
262 | static void ack_flush(void *_completed) |
263 | { | |
264 | atomic_t *completed = _completed; | |
265 | ||
266 | atomic_inc(completed); | |
267 | } | |
268 | ||
269 | void kvm_flush_remote_tlbs(struct kvm *kvm) | |
270 | { | |
271 | int i, cpu, needed; | |
272 | cpumask_t cpus; | |
273 | struct kvm_vcpu *vcpu; | |
274 | atomic_t completed; | |
275 | ||
276 | atomic_set(&completed, 0); | |
277 | cpus_clear(cpus); | |
278 | needed = 0; | |
fb3f0f51 RR |
279 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
280 | vcpu = kvm->vcpus[i]; | |
281 | if (!vcpu) | |
282 | continue; | |
d9e368d6 AK |
283 | if (test_and_set_bit(KVM_TLB_FLUSH, &vcpu->requests)) |
284 | continue; | |
285 | cpu = vcpu->cpu; | |
286 | if (cpu != -1 && cpu != raw_smp_processor_id()) | |
287 | if (!cpu_isset(cpu, cpus)) { | |
288 | cpu_set(cpu, cpus); | |
289 | ++needed; | |
290 | } | |
291 | } | |
292 | ||
293 | /* | |
294 | * We really want smp_call_function_mask() here. But that's not | |
295 | * available, so ipi all cpus in parallel and wait for them | |
296 | * to complete. | |
297 | */ | |
298 | for (cpu = first_cpu(cpus); cpu != NR_CPUS; cpu = next_cpu(cpu, cpus)) | |
299 | smp_call_function_single(cpu, ack_flush, &completed, 1, 0); | |
300 | while (atomic_read(&completed) != needed) { | |
301 | cpu_relax(); | |
302 | barrier(); | |
303 | } | |
304 | } | |
305 | ||
fb3f0f51 RR |
306 | int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id) |
307 | { | |
308 | struct page *page; | |
309 | int r; | |
310 | ||
311 | mutex_init(&vcpu->mutex); | |
312 | vcpu->cpu = -1; | |
313 | vcpu->mmu.root_hpa = INVALID_PAGE; | |
314 | vcpu->kvm = kvm; | |
315 | vcpu->vcpu_id = id; | |
316 | ||
317 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
318 | if (!page) { | |
319 | r = -ENOMEM; | |
320 | goto fail; | |
321 | } | |
322 | vcpu->run = page_address(page); | |
323 | ||
324 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
325 | if (!page) { | |
326 | r = -ENOMEM; | |
327 | goto fail_free_run; | |
328 | } | |
329 | vcpu->pio_data = page_address(page); | |
330 | ||
331 | vcpu->host_fx_image = (char*)ALIGN((hva_t)vcpu->fx_buf, | |
332 | FX_IMAGE_ALIGN); | |
333 | vcpu->guest_fx_image = vcpu->host_fx_image + FX_IMAGE_SIZE; | |
334 | ||
335 | r = kvm_mmu_create(vcpu); | |
336 | if (r < 0) | |
337 | goto fail_free_pio_data; | |
338 | ||
339 | return 0; | |
340 | ||
341 | fail_free_pio_data: | |
342 | free_page((unsigned long)vcpu->pio_data); | |
343 | fail_free_run: | |
344 | free_page((unsigned long)vcpu->run); | |
345 | fail: | |
346 | return -ENOMEM; | |
347 | } | |
348 | EXPORT_SYMBOL_GPL(kvm_vcpu_init); | |
349 | ||
350 | void kvm_vcpu_uninit(struct kvm_vcpu *vcpu) | |
351 | { | |
352 | kvm_mmu_destroy(vcpu); | |
353 | free_page((unsigned long)vcpu->pio_data); | |
354 | free_page((unsigned long)vcpu->run); | |
355 | } | |
356 | EXPORT_SYMBOL_GPL(kvm_vcpu_uninit); | |
357 | ||
f17abe9a | 358 | static struct kvm *kvm_create_vm(void) |
6aa8b732 AK |
359 | { |
360 | struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); | |
6aa8b732 AK |
361 | |
362 | if (!kvm) | |
f17abe9a | 363 | return ERR_PTR(-ENOMEM); |
6aa8b732 | 364 | |
74906345 | 365 | kvm_io_bus_init(&kvm->pio_bus); |
11ec2804 | 366 | mutex_init(&kvm->lock); |
6aa8b732 | 367 | INIT_LIST_HEAD(&kvm->active_mmu_pages); |
2eeb2e94 | 368 | kvm_io_bus_init(&kvm->mmio_bus); |
5e58cfe4 RR |
369 | spin_lock(&kvm_lock); |
370 | list_add(&kvm->vm_list, &vm_list); | |
371 | spin_unlock(&kvm_lock); | |
f17abe9a AK |
372 | return kvm; |
373 | } | |
374 | ||
375 | static int kvm_dev_open(struct inode *inode, struct file *filp) | |
376 | { | |
6aa8b732 AK |
377 | return 0; |
378 | } | |
379 | ||
380 | /* | |
381 | * Free any memory in @free but not in @dont. | |
382 | */ | |
383 | static void kvm_free_physmem_slot(struct kvm_memory_slot *free, | |
384 | struct kvm_memory_slot *dont) | |
385 | { | |
386 | int i; | |
387 | ||
388 | if (!dont || free->phys_mem != dont->phys_mem) | |
389 | if (free->phys_mem) { | |
390 | for (i = 0; i < free->npages; ++i) | |
55a54f79 AK |
391 | if (free->phys_mem[i]) |
392 | __free_page(free->phys_mem[i]); | |
6aa8b732 AK |
393 | vfree(free->phys_mem); |
394 | } | |
395 | ||
396 | if (!dont || free->dirty_bitmap != dont->dirty_bitmap) | |
397 | vfree(free->dirty_bitmap); | |
398 | ||
8b6d44c7 | 399 | free->phys_mem = NULL; |
6aa8b732 | 400 | free->npages = 0; |
8b6d44c7 | 401 | free->dirty_bitmap = NULL; |
6aa8b732 AK |
402 | } |
403 | ||
404 | static void kvm_free_physmem(struct kvm *kvm) | |
405 | { | |
406 | int i; | |
407 | ||
408 | for (i = 0; i < kvm->nmemslots; ++i) | |
8b6d44c7 | 409 | kvm_free_physmem_slot(&kvm->memslots[i], NULL); |
6aa8b732 AK |
410 | } |
411 | ||
039576c0 AK |
412 | static void free_pio_guest_pages(struct kvm_vcpu *vcpu) |
413 | { | |
414 | int i; | |
415 | ||
3077c451 | 416 | for (i = 0; i < ARRAY_SIZE(vcpu->pio.guest_pages); ++i) |
039576c0 AK |
417 | if (vcpu->pio.guest_pages[i]) { |
418 | __free_page(vcpu->pio.guest_pages[i]); | |
419 | vcpu->pio.guest_pages[i] = NULL; | |
420 | } | |
421 | } | |
422 | ||
7b53aa56 AK |
423 | static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu) |
424 | { | |
7b53aa56 AK |
425 | vcpu_load(vcpu); |
426 | kvm_mmu_unload(vcpu); | |
427 | vcpu_put(vcpu); | |
428 | } | |
429 | ||
6aa8b732 AK |
430 | static void kvm_free_vcpus(struct kvm *kvm) |
431 | { | |
432 | unsigned int i; | |
433 | ||
7b53aa56 AK |
434 | /* |
435 | * Unpin any mmu pages first. | |
436 | */ | |
437 | for (i = 0; i < KVM_MAX_VCPUS; ++i) | |
fb3f0f51 RR |
438 | if (kvm->vcpus[i]) |
439 | kvm_unload_vcpu_mmu(kvm->vcpus[i]); | |
440 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
441 | if (kvm->vcpus[i]) { | |
442 | kvm_arch_ops->vcpu_free(kvm->vcpus[i]); | |
443 | kvm->vcpus[i] = NULL; | |
444 | } | |
445 | } | |
446 | ||
6aa8b732 AK |
447 | } |
448 | ||
449 | static int kvm_dev_release(struct inode *inode, struct file *filp) | |
450 | { | |
f17abe9a AK |
451 | return 0; |
452 | } | |
6aa8b732 | 453 | |
f17abe9a AK |
454 | static void kvm_destroy_vm(struct kvm *kvm) |
455 | { | |
133de902 AK |
456 | spin_lock(&kvm_lock); |
457 | list_del(&kvm->vm_list); | |
458 | spin_unlock(&kvm_lock); | |
74906345 | 459 | kvm_io_bus_destroy(&kvm->pio_bus); |
2eeb2e94 | 460 | kvm_io_bus_destroy(&kvm->mmio_bus); |
6aa8b732 AK |
461 | kvm_free_vcpus(kvm); |
462 | kvm_free_physmem(kvm); | |
463 | kfree(kvm); | |
f17abe9a AK |
464 | } |
465 | ||
466 | static int kvm_vm_release(struct inode *inode, struct file *filp) | |
467 | { | |
468 | struct kvm *kvm = filp->private_data; | |
469 | ||
470 | kvm_destroy_vm(kvm); | |
6aa8b732 AK |
471 | return 0; |
472 | } | |
473 | ||
474 | static void inject_gp(struct kvm_vcpu *vcpu) | |
475 | { | |
476 | kvm_arch_ops->inject_gp(vcpu, 0); | |
477 | } | |
478 | ||
1342d353 AK |
479 | /* |
480 | * Load the pae pdptrs. Return true is they are all valid. | |
481 | */ | |
482 | static int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3) | |
6aa8b732 AK |
483 | { |
484 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; | |
1342d353 | 485 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; |
6aa8b732 | 486 | int i; |
6aa8b732 | 487 | u64 *pdpt; |
1342d353 | 488 | int ret; |
954bbbc2 | 489 | struct page *page; |
c820c2aa | 490 | u64 pdpte[ARRAY_SIZE(vcpu->pdptrs)]; |
6aa8b732 | 491 | |
11ec2804 | 492 | mutex_lock(&vcpu->kvm->lock); |
954bbbc2 | 493 | page = gfn_to_page(vcpu->kvm, pdpt_gfn); |
c820c2aa RR |
494 | if (!page) { |
495 | ret = 0; | |
496 | goto out; | |
497 | } | |
498 | ||
954bbbc2 | 499 | pdpt = kmap_atomic(page, KM_USER0); |
c820c2aa RR |
500 | memcpy(pdpte, pdpt+offset, sizeof(pdpte)); |
501 | kunmap_atomic(pdpt, KM_USER0); | |
6aa8b732 | 502 | |
c820c2aa RR |
503 | for (i = 0; i < ARRAY_SIZE(pdpte); ++i) { |
504 | if ((pdpte[i] & 1) && (pdpte[i] & 0xfffffff0000001e6ull)) { | |
1342d353 AK |
505 | ret = 0; |
506 | goto out; | |
507 | } | |
6aa8b732 | 508 | } |
c820c2aa | 509 | ret = 1; |
6aa8b732 | 510 | |
c820c2aa | 511 | memcpy(vcpu->pdptrs, pdpte, sizeof(vcpu->pdptrs)); |
1342d353 | 512 | out: |
11ec2804 | 513 | mutex_unlock(&vcpu->kvm->lock); |
6aa8b732 | 514 | |
1342d353 | 515 | return ret; |
6aa8b732 AK |
516 | } |
517 | ||
518 | void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) | |
519 | { | |
707d92fa | 520 | if (cr0 & CR0_RESERVED_BITS) { |
6aa8b732 AK |
521 | printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n", |
522 | cr0, vcpu->cr0); | |
523 | inject_gp(vcpu); | |
524 | return; | |
525 | } | |
526 | ||
707d92fa | 527 | if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) { |
6aa8b732 AK |
528 | printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n"); |
529 | inject_gp(vcpu); | |
530 | return; | |
531 | } | |
532 | ||
707d92fa | 533 | if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) { |
6aa8b732 AK |
534 | printk(KERN_DEBUG "set_cr0: #GP, set PG flag " |
535 | "and a clear PE flag\n"); | |
536 | inject_gp(vcpu); | |
537 | return; | |
538 | } | |
539 | ||
707d92fa | 540 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { |
05b3e0c2 | 541 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
542 | if ((vcpu->shadow_efer & EFER_LME)) { |
543 | int cs_db, cs_l; | |
544 | ||
545 | if (!is_pae(vcpu)) { | |
546 | printk(KERN_DEBUG "set_cr0: #GP, start paging " | |
547 | "in long mode while PAE is disabled\n"); | |
548 | inject_gp(vcpu); | |
549 | return; | |
550 | } | |
551 | kvm_arch_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
552 | if (cs_l) { | |
553 | printk(KERN_DEBUG "set_cr0: #GP, start paging " | |
554 | "in long mode while CS.L == 1\n"); | |
555 | inject_gp(vcpu); | |
556 | return; | |
557 | ||
558 | } | |
559 | } else | |
560 | #endif | |
1342d353 | 561 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->cr3)) { |
6aa8b732 AK |
562 | printk(KERN_DEBUG "set_cr0: #GP, pdptrs " |
563 | "reserved bits\n"); | |
564 | inject_gp(vcpu); | |
565 | return; | |
566 | } | |
567 | ||
568 | } | |
569 | ||
570 | kvm_arch_ops->set_cr0(vcpu, cr0); | |
571 | vcpu->cr0 = cr0; | |
572 | ||
11ec2804 | 573 | mutex_lock(&vcpu->kvm->lock); |
6aa8b732 | 574 | kvm_mmu_reset_context(vcpu); |
11ec2804 | 575 | mutex_unlock(&vcpu->kvm->lock); |
6aa8b732 AK |
576 | return; |
577 | } | |
578 | EXPORT_SYMBOL_GPL(set_cr0); | |
579 | ||
580 | void lmsw(struct kvm_vcpu *vcpu, unsigned long msw) | |
581 | { | |
582 | set_cr0(vcpu, (vcpu->cr0 & ~0x0ful) | (msw & 0x0f)); | |
583 | } | |
584 | EXPORT_SYMBOL_GPL(lmsw); | |
585 | ||
586 | void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) | |
587 | { | |
66aee91a | 588 | if (cr4 & CR4_RESERVED_BITS) { |
6aa8b732 AK |
589 | printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n"); |
590 | inject_gp(vcpu); | |
591 | return; | |
592 | } | |
593 | ||
a9058ecd | 594 | if (is_long_mode(vcpu)) { |
66aee91a | 595 | if (!(cr4 & X86_CR4_PAE)) { |
6aa8b732 AK |
596 | printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while " |
597 | "in long mode\n"); | |
598 | inject_gp(vcpu); | |
599 | return; | |
600 | } | |
66aee91a | 601 | } else if (is_paging(vcpu) && !is_pae(vcpu) && (cr4 & X86_CR4_PAE) |
1342d353 | 602 | && !load_pdptrs(vcpu, vcpu->cr3)) { |
6aa8b732 AK |
603 | printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n"); |
604 | inject_gp(vcpu); | |
310bc76c | 605 | return; |
6aa8b732 AK |
606 | } |
607 | ||
66aee91a | 608 | if (cr4 & X86_CR4_VMXE) { |
6aa8b732 AK |
609 | printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n"); |
610 | inject_gp(vcpu); | |
611 | return; | |
612 | } | |
613 | kvm_arch_ops->set_cr4(vcpu, cr4); | |
11ec2804 | 614 | mutex_lock(&vcpu->kvm->lock); |
6aa8b732 | 615 | kvm_mmu_reset_context(vcpu); |
11ec2804 | 616 | mutex_unlock(&vcpu->kvm->lock); |
6aa8b732 AK |
617 | } |
618 | EXPORT_SYMBOL_GPL(set_cr4); | |
619 | ||
620 | void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) | |
621 | { | |
a9058ecd | 622 | if (is_long_mode(vcpu)) { |
f802a307 | 623 | if (cr3 & CR3_L_MODE_RESERVED_BITS) { |
6aa8b732 AK |
624 | printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n"); |
625 | inject_gp(vcpu); | |
626 | return; | |
627 | } | |
628 | } else { | |
f802a307 RR |
629 | if (is_pae(vcpu)) { |
630 | if (cr3 & CR3_PAE_RESERVED_BITS) { | |
631 | printk(KERN_DEBUG | |
632 | "set_cr3: #GP, reserved bits\n"); | |
633 | inject_gp(vcpu); | |
634 | return; | |
635 | } | |
636 | if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) { | |
637 | printk(KERN_DEBUG "set_cr3: #GP, pdptrs " | |
638 | "reserved bits\n"); | |
639 | inject_gp(vcpu); | |
640 | return; | |
641 | } | |
642 | } else { | |
643 | if (cr3 & CR3_NONPAE_RESERVED_BITS) { | |
644 | printk(KERN_DEBUG | |
645 | "set_cr3: #GP, reserved bits\n"); | |
646 | inject_gp(vcpu); | |
647 | return; | |
648 | } | |
6aa8b732 AK |
649 | } |
650 | } | |
651 | ||
652 | vcpu->cr3 = cr3; | |
11ec2804 | 653 | mutex_lock(&vcpu->kvm->lock); |
d21225ee IM |
654 | /* |
655 | * Does the new cr3 value map to physical memory? (Note, we | |
656 | * catch an invalid cr3 even in real-mode, because it would | |
657 | * cause trouble later on when we turn on paging anyway.) | |
658 | * | |
659 | * A real CPU would silently accept an invalid cr3 and would | |
660 | * attempt to use it - with largely undefined (and often hard | |
661 | * to debug) behavior on the guest side. | |
662 | */ | |
663 | if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT))) | |
664 | inject_gp(vcpu); | |
665 | else | |
666 | vcpu->mmu.new_cr3(vcpu); | |
11ec2804 | 667 | mutex_unlock(&vcpu->kvm->lock); |
6aa8b732 AK |
668 | } |
669 | EXPORT_SYMBOL_GPL(set_cr3); | |
670 | ||
671 | void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) | |
672 | { | |
7075bc81 | 673 | if (cr8 & CR8_RESERVED_BITS) { |
6aa8b732 AK |
674 | printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8); |
675 | inject_gp(vcpu); | |
676 | return; | |
677 | } | |
678 | vcpu->cr8 = cr8; | |
679 | } | |
680 | EXPORT_SYMBOL_GPL(set_cr8); | |
681 | ||
682 | void fx_init(struct kvm_vcpu *vcpu) | |
683 | { | |
684 | struct __attribute__ ((__packed__)) fx_image_s { | |
685 | u16 control; //fcw | |
686 | u16 status; //fsw | |
687 | u16 tag; // ftw | |
688 | u16 opcode; //fop | |
689 | u64 ip; // fpu ip | |
690 | u64 operand;// fpu dp | |
691 | u32 mxcsr; | |
692 | u32 mxcsr_mask; | |
693 | ||
694 | } *fx_image; | |
695 | ||
9bd01506 RR |
696 | /* Initialize guest FPU by resetting ours and saving into guest's */ |
697 | preempt_disable(); | |
6aa8b732 AK |
698 | fx_save(vcpu->host_fx_image); |
699 | fpu_init(); | |
700 | fx_save(vcpu->guest_fx_image); | |
701 | fx_restore(vcpu->host_fx_image); | |
9bd01506 | 702 | preempt_enable(); |
6aa8b732 AK |
703 | |
704 | fx_image = (struct fx_image_s *)vcpu->guest_fx_image; | |
705 | fx_image->mxcsr = 0x1f80; | |
706 | memset(vcpu->guest_fx_image + sizeof(struct fx_image_s), | |
707 | 0, FX_IMAGE_SIZE - sizeof(struct fx_image_s)); | |
708 | } | |
709 | EXPORT_SYMBOL_GPL(fx_init); | |
710 | ||
6aa8b732 AK |
711 | /* |
712 | * Allocate some memory and give it an address in the guest physical address | |
713 | * space. | |
714 | * | |
715 | * Discontiguous memory is allowed, mostly for framebuffers. | |
716 | */ | |
2c6f5df9 AK |
717 | static int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, |
718 | struct kvm_memory_region *mem) | |
6aa8b732 AK |
719 | { |
720 | int r; | |
721 | gfn_t base_gfn; | |
722 | unsigned long npages; | |
723 | unsigned long i; | |
724 | struct kvm_memory_slot *memslot; | |
725 | struct kvm_memory_slot old, new; | |
726 | int memory_config_version; | |
727 | ||
728 | r = -EINVAL; | |
729 | /* General sanity checks */ | |
730 | if (mem->memory_size & (PAGE_SIZE - 1)) | |
731 | goto out; | |
732 | if (mem->guest_phys_addr & (PAGE_SIZE - 1)) | |
733 | goto out; | |
734 | if (mem->slot >= KVM_MEMORY_SLOTS) | |
735 | goto out; | |
736 | if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr) | |
737 | goto out; | |
738 | ||
739 | memslot = &kvm->memslots[mem->slot]; | |
740 | base_gfn = mem->guest_phys_addr >> PAGE_SHIFT; | |
741 | npages = mem->memory_size >> PAGE_SHIFT; | |
742 | ||
743 | if (!npages) | |
744 | mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES; | |
745 | ||
746 | raced: | |
11ec2804 | 747 | mutex_lock(&kvm->lock); |
6aa8b732 AK |
748 | |
749 | memory_config_version = kvm->memory_config_version; | |
750 | new = old = *memslot; | |
751 | ||
752 | new.base_gfn = base_gfn; | |
753 | new.npages = npages; | |
754 | new.flags = mem->flags; | |
755 | ||
756 | /* Disallow changing a memory slot's size. */ | |
757 | r = -EINVAL; | |
758 | if (npages && old.npages && npages != old.npages) | |
759 | goto out_unlock; | |
760 | ||
761 | /* Check for overlaps */ | |
762 | r = -EEXIST; | |
763 | for (i = 0; i < KVM_MEMORY_SLOTS; ++i) { | |
764 | struct kvm_memory_slot *s = &kvm->memslots[i]; | |
765 | ||
766 | if (s == memslot) | |
767 | continue; | |
768 | if (!((base_gfn + npages <= s->base_gfn) || | |
769 | (base_gfn >= s->base_gfn + s->npages))) | |
770 | goto out_unlock; | |
771 | } | |
772 | /* | |
773 | * Do memory allocations outside lock. memory_config_version will | |
774 | * detect any races. | |
775 | */ | |
11ec2804 | 776 | mutex_unlock(&kvm->lock); |
6aa8b732 AK |
777 | |
778 | /* Deallocate if slot is being removed */ | |
779 | if (!npages) | |
8b6d44c7 | 780 | new.phys_mem = NULL; |
6aa8b732 AK |
781 | |
782 | /* Free page dirty bitmap if unneeded */ | |
783 | if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES)) | |
8b6d44c7 | 784 | new.dirty_bitmap = NULL; |
6aa8b732 AK |
785 | |
786 | r = -ENOMEM; | |
787 | ||
788 | /* Allocate if a slot is being created */ | |
789 | if (npages && !new.phys_mem) { | |
790 | new.phys_mem = vmalloc(npages * sizeof(struct page *)); | |
791 | ||
792 | if (!new.phys_mem) | |
793 | goto out_free; | |
794 | ||
795 | memset(new.phys_mem, 0, npages * sizeof(struct page *)); | |
796 | for (i = 0; i < npages; ++i) { | |
797 | new.phys_mem[i] = alloc_page(GFP_HIGHUSER | |
798 | | __GFP_ZERO); | |
799 | if (!new.phys_mem[i]) | |
800 | goto out_free; | |
5972e953 | 801 | set_page_private(new.phys_mem[i],0); |
6aa8b732 AK |
802 | } |
803 | } | |
804 | ||
805 | /* Allocate page dirty bitmap if needed */ | |
806 | if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) { | |
807 | unsigned dirty_bytes = ALIGN(npages, BITS_PER_LONG) / 8; | |
808 | ||
809 | new.dirty_bitmap = vmalloc(dirty_bytes); | |
810 | if (!new.dirty_bitmap) | |
811 | goto out_free; | |
812 | memset(new.dirty_bitmap, 0, dirty_bytes); | |
813 | } | |
814 | ||
11ec2804 | 815 | mutex_lock(&kvm->lock); |
6aa8b732 AK |
816 | |
817 | if (memory_config_version != kvm->memory_config_version) { | |
11ec2804 | 818 | mutex_unlock(&kvm->lock); |
6aa8b732 AK |
819 | kvm_free_physmem_slot(&new, &old); |
820 | goto raced; | |
821 | } | |
822 | ||
823 | r = -EAGAIN; | |
824 | if (kvm->busy) | |
825 | goto out_unlock; | |
826 | ||
827 | if (mem->slot >= kvm->nmemslots) | |
828 | kvm->nmemslots = mem->slot + 1; | |
829 | ||
830 | *memslot = new; | |
831 | ++kvm->memory_config_version; | |
832 | ||
90cb0529 AK |
833 | kvm_mmu_slot_remove_write_access(kvm, mem->slot); |
834 | kvm_flush_remote_tlbs(kvm); | |
6aa8b732 | 835 | |
11ec2804 | 836 | mutex_unlock(&kvm->lock); |
6aa8b732 AK |
837 | |
838 | kvm_free_physmem_slot(&old, &new); | |
839 | return 0; | |
840 | ||
841 | out_unlock: | |
11ec2804 | 842 | mutex_unlock(&kvm->lock); |
6aa8b732 AK |
843 | out_free: |
844 | kvm_free_physmem_slot(&new, &old); | |
845 | out: | |
846 | return r; | |
847 | } | |
848 | ||
849 | /* | |
850 | * Get (and clear) the dirty memory log for a memory slot. | |
851 | */ | |
2c6f5df9 AK |
852 | static int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, |
853 | struct kvm_dirty_log *log) | |
6aa8b732 AK |
854 | { |
855 | struct kvm_memory_slot *memslot; | |
856 | int r, i; | |
857 | int n; | |
858 | unsigned long any = 0; | |
859 | ||
11ec2804 | 860 | mutex_lock(&kvm->lock); |
6aa8b732 AK |
861 | |
862 | /* | |
863 | * Prevent changes to guest memory configuration even while the lock | |
864 | * is not taken. | |
865 | */ | |
866 | ++kvm->busy; | |
11ec2804 | 867 | mutex_unlock(&kvm->lock); |
6aa8b732 AK |
868 | r = -EINVAL; |
869 | if (log->slot >= KVM_MEMORY_SLOTS) | |
870 | goto out; | |
871 | ||
872 | memslot = &kvm->memslots[log->slot]; | |
873 | r = -ENOENT; | |
874 | if (!memslot->dirty_bitmap) | |
875 | goto out; | |
876 | ||
cd1a4a98 | 877 | n = ALIGN(memslot->npages, BITS_PER_LONG) / 8; |
6aa8b732 | 878 | |
cd1a4a98 | 879 | for (i = 0; !any && i < n/sizeof(long); ++i) |
6aa8b732 AK |
880 | any = memslot->dirty_bitmap[i]; |
881 | ||
882 | r = -EFAULT; | |
883 | if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n)) | |
884 | goto out; | |
885 | ||
11ec2804 | 886 | mutex_lock(&kvm->lock); |
90cb0529 AK |
887 | kvm_mmu_slot_remove_write_access(kvm, log->slot); |
888 | kvm_flush_remote_tlbs(kvm); | |
889 | memset(memslot->dirty_bitmap, 0, n); | |
11ec2804 | 890 | mutex_unlock(&kvm->lock); |
6aa8b732 AK |
891 | |
892 | r = 0; | |
893 | ||
894 | out: | |
11ec2804 | 895 | mutex_lock(&kvm->lock); |
6aa8b732 | 896 | --kvm->busy; |
11ec2804 | 897 | mutex_unlock(&kvm->lock); |
6aa8b732 AK |
898 | return r; |
899 | } | |
900 | ||
e8207547 AK |
901 | /* |
902 | * Set a new alias region. Aliases map a portion of physical memory into | |
903 | * another portion. This is useful for memory windows, for example the PC | |
904 | * VGA region. | |
905 | */ | |
906 | static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm, | |
907 | struct kvm_memory_alias *alias) | |
908 | { | |
909 | int r, n; | |
910 | struct kvm_mem_alias *p; | |
911 | ||
912 | r = -EINVAL; | |
913 | /* General sanity checks */ | |
914 | if (alias->memory_size & (PAGE_SIZE - 1)) | |
915 | goto out; | |
916 | if (alias->guest_phys_addr & (PAGE_SIZE - 1)) | |
917 | goto out; | |
918 | if (alias->slot >= KVM_ALIAS_SLOTS) | |
919 | goto out; | |
920 | if (alias->guest_phys_addr + alias->memory_size | |
921 | < alias->guest_phys_addr) | |
922 | goto out; | |
923 | if (alias->target_phys_addr + alias->memory_size | |
924 | < alias->target_phys_addr) | |
925 | goto out; | |
926 | ||
11ec2804 | 927 | mutex_lock(&kvm->lock); |
e8207547 AK |
928 | |
929 | p = &kvm->aliases[alias->slot]; | |
930 | p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT; | |
931 | p->npages = alias->memory_size >> PAGE_SHIFT; | |
932 | p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT; | |
933 | ||
934 | for (n = KVM_ALIAS_SLOTS; n > 0; --n) | |
935 | if (kvm->aliases[n - 1].npages) | |
936 | break; | |
937 | kvm->naliases = n; | |
938 | ||
90cb0529 | 939 | kvm_mmu_zap_all(kvm); |
e8207547 | 940 | |
11ec2804 | 941 | mutex_unlock(&kvm->lock); |
e8207547 AK |
942 | |
943 | return 0; | |
944 | ||
945 | out: | |
946 | return r; | |
947 | } | |
948 | ||
949 | static gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) | |
950 | { | |
951 | int i; | |
952 | struct kvm_mem_alias *alias; | |
953 | ||
954 | for (i = 0; i < kvm->naliases; ++i) { | |
955 | alias = &kvm->aliases[i]; | |
956 | if (gfn >= alias->base_gfn | |
957 | && gfn < alias->base_gfn + alias->npages) | |
958 | return alias->target_gfn + gfn - alias->base_gfn; | |
959 | } | |
960 | return gfn; | |
961 | } | |
962 | ||
963 | static struct kvm_memory_slot *__gfn_to_memslot(struct kvm *kvm, gfn_t gfn) | |
6aa8b732 AK |
964 | { |
965 | int i; | |
966 | ||
967 | for (i = 0; i < kvm->nmemslots; ++i) { | |
968 | struct kvm_memory_slot *memslot = &kvm->memslots[i]; | |
969 | ||
970 | if (gfn >= memslot->base_gfn | |
971 | && gfn < memslot->base_gfn + memslot->npages) | |
972 | return memslot; | |
973 | } | |
8b6d44c7 | 974 | return NULL; |
6aa8b732 | 975 | } |
e8207547 AK |
976 | |
977 | struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn) | |
978 | { | |
979 | gfn = unalias_gfn(kvm, gfn); | |
980 | return __gfn_to_memslot(kvm, gfn); | |
981 | } | |
6aa8b732 | 982 | |
954bbbc2 AK |
983 | struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn) |
984 | { | |
985 | struct kvm_memory_slot *slot; | |
986 | ||
e8207547 AK |
987 | gfn = unalias_gfn(kvm, gfn); |
988 | slot = __gfn_to_memslot(kvm, gfn); | |
954bbbc2 AK |
989 | if (!slot) |
990 | return NULL; | |
991 | return slot->phys_mem[gfn - slot->base_gfn]; | |
992 | } | |
993 | EXPORT_SYMBOL_GPL(gfn_to_page); | |
994 | ||
6aa8b732 AK |
995 | void mark_page_dirty(struct kvm *kvm, gfn_t gfn) |
996 | { | |
997 | int i; | |
31389947 | 998 | struct kvm_memory_slot *memslot; |
6aa8b732 AK |
999 | unsigned long rel_gfn; |
1000 | ||
1001 | for (i = 0; i < kvm->nmemslots; ++i) { | |
1002 | memslot = &kvm->memslots[i]; | |
1003 | ||
1004 | if (gfn >= memslot->base_gfn | |
1005 | && gfn < memslot->base_gfn + memslot->npages) { | |
1006 | ||
31389947 | 1007 | if (!memslot->dirty_bitmap) |
6aa8b732 AK |
1008 | return; |
1009 | ||
1010 | rel_gfn = gfn - memslot->base_gfn; | |
1011 | ||
1012 | /* avoid RMW */ | |
1013 | if (!test_bit(rel_gfn, memslot->dirty_bitmap)) | |
1014 | set_bit(rel_gfn, memslot->dirty_bitmap); | |
1015 | return; | |
1016 | } | |
1017 | } | |
1018 | } | |
1019 | ||
1020 | static int emulator_read_std(unsigned long addr, | |
4c690a1e | 1021 | void *val, |
6aa8b732 AK |
1022 | unsigned int bytes, |
1023 | struct x86_emulate_ctxt *ctxt) | |
1024 | { | |
1025 | struct kvm_vcpu *vcpu = ctxt->vcpu; | |
1026 | void *data = val; | |
1027 | ||
1028 | while (bytes) { | |
1029 | gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr); | |
1030 | unsigned offset = addr & (PAGE_SIZE-1); | |
1031 | unsigned tocopy = min(bytes, (unsigned)PAGE_SIZE - offset); | |
1032 | unsigned long pfn; | |
954bbbc2 AK |
1033 | struct page *page; |
1034 | void *page_virt; | |
6aa8b732 AK |
1035 | |
1036 | if (gpa == UNMAPPED_GVA) | |
1037 | return X86EMUL_PROPAGATE_FAULT; | |
1038 | pfn = gpa >> PAGE_SHIFT; | |
954bbbc2 AK |
1039 | page = gfn_to_page(vcpu->kvm, pfn); |
1040 | if (!page) | |
6aa8b732 | 1041 | return X86EMUL_UNHANDLEABLE; |
954bbbc2 | 1042 | page_virt = kmap_atomic(page, KM_USER0); |
6aa8b732 | 1043 | |
954bbbc2 | 1044 | memcpy(data, page_virt + offset, tocopy); |
6aa8b732 | 1045 | |
954bbbc2 | 1046 | kunmap_atomic(page_virt, KM_USER0); |
6aa8b732 AK |
1047 | |
1048 | bytes -= tocopy; | |
1049 | data += tocopy; | |
1050 | addr += tocopy; | |
1051 | } | |
1052 | ||
1053 | return X86EMUL_CONTINUE; | |
1054 | } | |
1055 | ||
1056 | static int emulator_write_std(unsigned long addr, | |
4c690a1e | 1057 | const void *val, |
6aa8b732 AK |
1058 | unsigned int bytes, |
1059 | struct x86_emulate_ctxt *ctxt) | |
1060 | { | |
1061 | printk(KERN_ERR "emulator_write_std: addr %lx n %d\n", | |
1062 | addr, bytes); | |
1063 | return X86EMUL_UNHANDLEABLE; | |
1064 | } | |
1065 | ||
2eeb2e94 GH |
1066 | static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu, |
1067 | gpa_t addr) | |
1068 | { | |
1069 | /* | |
1070 | * Note that its important to have this wrapper function because | |
1071 | * in the very near future we will be checking for MMIOs against | |
1072 | * the LAPIC as well as the general MMIO bus | |
1073 | */ | |
1074 | return kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr); | |
1075 | } | |
1076 | ||
74906345 ED |
1077 | static struct kvm_io_device *vcpu_find_pio_dev(struct kvm_vcpu *vcpu, |
1078 | gpa_t addr) | |
1079 | { | |
1080 | return kvm_io_bus_find_dev(&vcpu->kvm->pio_bus, addr); | |
1081 | } | |
1082 | ||
6aa8b732 | 1083 | static int emulator_read_emulated(unsigned long addr, |
4c690a1e | 1084 | void *val, |
6aa8b732 AK |
1085 | unsigned int bytes, |
1086 | struct x86_emulate_ctxt *ctxt) | |
1087 | { | |
2eeb2e94 GH |
1088 | struct kvm_vcpu *vcpu = ctxt->vcpu; |
1089 | struct kvm_io_device *mmio_dev; | |
1090 | gpa_t gpa; | |
6aa8b732 AK |
1091 | |
1092 | if (vcpu->mmio_read_completed) { | |
1093 | memcpy(val, vcpu->mmio_data, bytes); | |
1094 | vcpu->mmio_read_completed = 0; | |
1095 | return X86EMUL_CONTINUE; | |
1096 | } else if (emulator_read_std(addr, val, bytes, ctxt) | |
1097 | == X86EMUL_CONTINUE) | |
1098 | return X86EMUL_CONTINUE; | |
d27d4aca | 1099 | |
2eeb2e94 GH |
1100 | gpa = vcpu->mmu.gva_to_gpa(vcpu, addr); |
1101 | if (gpa == UNMAPPED_GVA) | |
1102 | return X86EMUL_PROPAGATE_FAULT; | |
6aa8b732 | 1103 | |
2eeb2e94 GH |
1104 | /* |
1105 | * Is this MMIO handled locally? | |
1106 | */ | |
1107 | mmio_dev = vcpu_find_mmio_dev(vcpu, gpa); | |
1108 | if (mmio_dev) { | |
1109 | kvm_iodevice_read(mmio_dev, gpa, bytes, val); | |
1110 | return X86EMUL_CONTINUE; | |
6aa8b732 | 1111 | } |
2eeb2e94 GH |
1112 | |
1113 | vcpu->mmio_needed = 1; | |
1114 | vcpu->mmio_phys_addr = gpa; | |
1115 | vcpu->mmio_size = bytes; | |
1116 | vcpu->mmio_is_write = 0; | |
1117 | ||
1118 | return X86EMUL_UNHANDLEABLE; | |
6aa8b732 AK |
1119 | } |
1120 | ||
da4a00f0 | 1121 | static int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
4c690a1e | 1122 | const void *val, int bytes) |
da4a00f0 | 1123 | { |
da4a00f0 AK |
1124 | struct page *page; |
1125 | void *virt; | |
1126 | ||
1127 | if (((gpa + bytes - 1) >> PAGE_SHIFT) != (gpa >> PAGE_SHIFT)) | |
1128 | return 0; | |
954bbbc2 AK |
1129 | page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT); |
1130 | if (!page) | |
da4a00f0 | 1131 | return 0; |
ab51a434 | 1132 | mark_page_dirty(vcpu->kvm, gpa >> PAGE_SHIFT); |
da4a00f0 | 1133 | virt = kmap_atomic(page, KM_USER0); |
fe551881 | 1134 | kvm_mmu_pte_write(vcpu, gpa, val, bytes); |
7cfa4b0a | 1135 | memcpy(virt + offset_in_page(gpa), val, bytes); |
da4a00f0 | 1136 | kunmap_atomic(virt, KM_USER0); |
da4a00f0 AK |
1137 | return 1; |
1138 | } | |
1139 | ||
b0fcd903 AK |
1140 | static int emulator_write_emulated_onepage(unsigned long addr, |
1141 | const void *val, | |
1142 | unsigned int bytes, | |
1143 | struct x86_emulate_ctxt *ctxt) | |
6aa8b732 | 1144 | { |
2eeb2e94 GH |
1145 | struct kvm_vcpu *vcpu = ctxt->vcpu; |
1146 | struct kvm_io_device *mmio_dev; | |
1147 | gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr); | |
6aa8b732 | 1148 | |
c9047f53 AK |
1149 | if (gpa == UNMAPPED_GVA) { |
1150 | kvm_arch_ops->inject_page_fault(vcpu, addr, 2); | |
6aa8b732 | 1151 | return X86EMUL_PROPAGATE_FAULT; |
c9047f53 | 1152 | } |
6aa8b732 | 1153 | |
da4a00f0 AK |
1154 | if (emulator_write_phys(vcpu, gpa, val, bytes)) |
1155 | return X86EMUL_CONTINUE; | |
1156 | ||
2eeb2e94 GH |
1157 | /* |
1158 | * Is this MMIO handled locally? | |
1159 | */ | |
1160 | mmio_dev = vcpu_find_mmio_dev(vcpu, gpa); | |
1161 | if (mmio_dev) { | |
1162 | kvm_iodevice_write(mmio_dev, gpa, bytes, val); | |
1163 | return X86EMUL_CONTINUE; | |
1164 | } | |
1165 | ||
6aa8b732 AK |
1166 | vcpu->mmio_needed = 1; |
1167 | vcpu->mmio_phys_addr = gpa; | |
1168 | vcpu->mmio_size = bytes; | |
1169 | vcpu->mmio_is_write = 1; | |
4c690a1e | 1170 | memcpy(vcpu->mmio_data, val, bytes); |
6aa8b732 AK |
1171 | |
1172 | return X86EMUL_CONTINUE; | |
1173 | } | |
1174 | ||
b0fcd903 AK |
1175 | static int emulator_write_emulated(unsigned long addr, |
1176 | const void *val, | |
1177 | unsigned int bytes, | |
1178 | struct x86_emulate_ctxt *ctxt) | |
1179 | { | |
1180 | /* Crossing a page boundary? */ | |
1181 | if (((addr + bytes - 1) ^ addr) & PAGE_MASK) { | |
1182 | int rc, now; | |
1183 | ||
1184 | now = -addr & ~PAGE_MASK; | |
1185 | rc = emulator_write_emulated_onepage(addr, val, now, ctxt); | |
1186 | if (rc != X86EMUL_CONTINUE) | |
1187 | return rc; | |
1188 | addr += now; | |
1189 | val += now; | |
1190 | bytes -= now; | |
1191 | } | |
1192 | return emulator_write_emulated_onepage(addr, val, bytes, ctxt); | |
1193 | } | |
1194 | ||
6aa8b732 | 1195 | static int emulator_cmpxchg_emulated(unsigned long addr, |
4c690a1e AK |
1196 | const void *old, |
1197 | const void *new, | |
6aa8b732 AK |
1198 | unsigned int bytes, |
1199 | struct x86_emulate_ctxt *ctxt) | |
1200 | { | |
1201 | static int reported; | |
1202 | ||
1203 | if (!reported) { | |
1204 | reported = 1; | |
1205 | printk(KERN_WARNING "kvm: emulating exchange as write\n"); | |
1206 | } | |
1207 | return emulator_write_emulated(addr, new, bytes, ctxt); | |
1208 | } | |
1209 | ||
1210 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) | |
1211 | { | |
1212 | return kvm_arch_ops->get_segment_base(vcpu, seg); | |
1213 | } | |
1214 | ||
1215 | int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address) | |
1216 | { | |
6aa8b732 AK |
1217 | return X86EMUL_CONTINUE; |
1218 | } | |
1219 | ||
1220 | int emulate_clts(struct kvm_vcpu *vcpu) | |
1221 | { | |
399badf3 | 1222 | unsigned long cr0; |
6aa8b732 | 1223 | |
707d92fa | 1224 | cr0 = vcpu->cr0 & ~X86_CR0_TS; |
6aa8b732 AK |
1225 | kvm_arch_ops->set_cr0(vcpu, cr0); |
1226 | return X86EMUL_CONTINUE; | |
1227 | } | |
1228 | ||
1229 | int emulator_get_dr(struct x86_emulate_ctxt* ctxt, int dr, unsigned long *dest) | |
1230 | { | |
1231 | struct kvm_vcpu *vcpu = ctxt->vcpu; | |
1232 | ||
1233 | switch (dr) { | |
1234 | case 0 ... 3: | |
1235 | *dest = kvm_arch_ops->get_dr(vcpu, dr); | |
1236 | return X86EMUL_CONTINUE; | |
1237 | default: | |
1238 | printk(KERN_DEBUG "%s: unexpected dr %u\n", | |
1239 | __FUNCTION__, dr); | |
1240 | return X86EMUL_UNHANDLEABLE; | |
1241 | } | |
1242 | } | |
1243 | ||
1244 | int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value) | |
1245 | { | |
1246 | unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U; | |
1247 | int exception; | |
1248 | ||
1249 | kvm_arch_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception); | |
1250 | if (exception) { | |
1251 | /* FIXME: better handling */ | |
1252 | return X86EMUL_UNHANDLEABLE; | |
1253 | } | |
1254 | return X86EMUL_CONTINUE; | |
1255 | } | |
1256 | ||
1257 | static void report_emulation_failure(struct x86_emulate_ctxt *ctxt) | |
1258 | { | |
1259 | static int reported; | |
1260 | u8 opcodes[4]; | |
1261 | unsigned long rip = ctxt->vcpu->rip; | |
1262 | unsigned long rip_linear; | |
1263 | ||
1264 | rip_linear = rip + get_segment_base(ctxt->vcpu, VCPU_SREG_CS); | |
1265 | ||
1266 | if (reported) | |
1267 | return; | |
1268 | ||
1269 | emulator_read_std(rip_linear, (void *)opcodes, 4, ctxt); | |
1270 | ||
1271 | printk(KERN_ERR "emulation failed but !mmio_needed?" | |
1272 | " rip %lx %02x %02x %02x %02x\n", | |
1273 | rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]); | |
1274 | reported = 1; | |
1275 | } | |
1276 | ||
1277 | struct x86_emulate_ops emulate_ops = { | |
1278 | .read_std = emulator_read_std, | |
1279 | .write_std = emulator_write_std, | |
1280 | .read_emulated = emulator_read_emulated, | |
1281 | .write_emulated = emulator_write_emulated, | |
1282 | .cmpxchg_emulated = emulator_cmpxchg_emulated, | |
1283 | }; | |
1284 | ||
1285 | int emulate_instruction(struct kvm_vcpu *vcpu, | |
1286 | struct kvm_run *run, | |
1287 | unsigned long cr2, | |
1288 | u16 error_code) | |
1289 | { | |
1290 | struct x86_emulate_ctxt emulate_ctxt; | |
1291 | int r; | |
1292 | int cs_db, cs_l; | |
1293 | ||
e7df56e4 | 1294 | vcpu->mmio_fault_cr2 = cr2; |
6aa8b732 AK |
1295 | kvm_arch_ops->cache_regs(vcpu); |
1296 | ||
1297 | kvm_arch_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
1298 | ||
1299 | emulate_ctxt.vcpu = vcpu; | |
1300 | emulate_ctxt.eflags = kvm_arch_ops->get_rflags(vcpu); | |
1301 | emulate_ctxt.cr2 = cr2; | |
1302 | emulate_ctxt.mode = (emulate_ctxt.eflags & X86_EFLAGS_VM) | |
1303 | ? X86EMUL_MODE_REAL : cs_l | |
1304 | ? X86EMUL_MODE_PROT64 : cs_db | |
1305 | ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16; | |
1306 | ||
1307 | if (emulate_ctxt.mode == X86EMUL_MODE_PROT64) { | |
1308 | emulate_ctxt.cs_base = 0; | |
1309 | emulate_ctxt.ds_base = 0; | |
1310 | emulate_ctxt.es_base = 0; | |
1311 | emulate_ctxt.ss_base = 0; | |
1312 | } else { | |
1313 | emulate_ctxt.cs_base = get_segment_base(vcpu, VCPU_SREG_CS); | |
1314 | emulate_ctxt.ds_base = get_segment_base(vcpu, VCPU_SREG_DS); | |
1315 | emulate_ctxt.es_base = get_segment_base(vcpu, VCPU_SREG_ES); | |
1316 | emulate_ctxt.ss_base = get_segment_base(vcpu, VCPU_SREG_SS); | |
1317 | } | |
1318 | ||
1319 | emulate_ctxt.gs_base = get_segment_base(vcpu, VCPU_SREG_GS); | |
1320 | emulate_ctxt.fs_base = get_segment_base(vcpu, VCPU_SREG_FS); | |
1321 | ||
1322 | vcpu->mmio_is_write = 0; | |
1323 | r = x86_emulate_memop(&emulate_ctxt, &emulate_ops); | |
1324 | ||
1325 | if ((r || vcpu->mmio_is_write) && run) { | |
8fc0d085 | 1326 | run->exit_reason = KVM_EXIT_MMIO; |
6aa8b732 AK |
1327 | run->mmio.phys_addr = vcpu->mmio_phys_addr; |
1328 | memcpy(run->mmio.data, vcpu->mmio_data, 8); | |
1329 | run->mmio.len = vcpu->mmio_size; | |
1330 | run->mmio.is_write = vcpu->mmio_is_write; | |
1331 | } | |
1332 | ||
1333 | if (r) { | |
a436036b AK |
1334 | if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) |
1335 | return EMULATE_DONE; | |
6aa8b732 AK |
1336 | if (!vcpu->mmio_needed) { |
1337 | report_emulation_failure(&emulate_ctxt); | |
1338 | return EMULATE_FAIL; | |
1339 | } | |
1340 | return EMULATE_DO_MMIO; | |
1341 | } | |
1342 | ||
1343 | kvm_arch_ops->decache_regs(vcpu); | |
1344 | kvm_arch_ops->set_rflags(vcpu, emulate_ctxt.eflags); | |
1345 | ||
02c83209 AK |
1346 | if (vcpu->mmio_is_write) { |
1347 | vcpu->mmio_needed = 0; | |
6aa8b732 | 1348 | return EMULATE_DO_MMIO; |
02c83209 | 1349 | } |
6aa8b732 AK |
1350 | |
1351 | return EMULATE_DONE; | |
1352 | } | |
1353 | EXPORT_SYMBOL_GPL(emulate_instruction); | |
1354 | ||
d3bef15f AK |
1355 | int kvm_emulate_halt(struct kvm_vcpu *vcpu) |
1356 | { | |
1357 | if (vcpu->irq_summary) | |
1358 | return 1; | |
1359 | ||
1360 | vcpu->run->exit_reason = KVM_EXIT_HLT; | |
1361 | ++vcpu->stat.halt_exits; | |
1362 | return 0; | |
1363 | } | |
1364 | EXPORT_SYMBOL_GPL(kvm_emulate_halt); | |
1365 | ||
270fd9b9 AK |
1366 | int kvm_hypercall(struct kvm_vcpu *vcpu, struct kvm_run *run) |
1367 | { | |
1368 | unsigned long nr, a0, a1, a2, a3, a4, a5, ret; | |
1369 | ||
9b22bf57 | 1370 | kvm_arch_ops->cache_regs(vcpu); |
270fd9b9 AK |
1371 | ret = -KVM_EINVAL; |
1372 | #ifdef CONFIG_X86_64 | |
1373 | if (is_long_mode(vcpu)) { | |
1374 | nr = vcpu->regs[VCPU_REGS_RAX]; | |
1375 | a0 = vcpu->regs[VCPU_REGS_RDI]; | |
1376 | a1 = vcpu->regs[VCPU_REGS_RSI]; | |
1377 | a2 = vcpu->regs[VCPU_REGS_RDX]; | |
1378 | a3 = vcpu->regs[VCPU_REGS_RCX]; | |
1379 | a4 = vcpu->regs[VCPU_REGS_R8]; | |
1380 | a5 = vcpu->regs[VCPU_REGS_R9]; | |
1381 | } else | |
1382 | #endif | |
1383 | { | |
1384 | nr = vcpu->regs[VCPU_REGS_RBX] & -1u; | |
1385 | a0 = vcpu->regs[VCPU_REGS_RAX] & -1u; | |
1386 | a1 = vcpu->regs[VCPU_REGS_RCX] & -1u; | |
1387 | a2 = vcpu->regs[VCPU_REGS_RDX] & -1u; | |
1388 | a3 = vcpu->regs[VCPU_REGS_RSI] & -1u; | |
1389 | a4 = vcpu->regs[VCPU_REGS_RDI] & -1u; | |
1390 | a5 = vcpu->regs[VCPU_REGS_RBP] & -1u; | |
1391 | } | |
1392 | switch (nr) { | |
1393 | default: | |
519ef353 | 1394 | run->hypercall.nr = nr; |
b4e63f56 AK |
1395 | run->hypercall.args[0] = a0; |
1396 | run->hypercall.args[1] = a1; | |
1397 | run->hypercall.args[2] = a2; | |
1398 | run->hypercall.args[3] = a3; | |
1399 | run->hypercall.args[4] = a4; | |
1400 | run->hypercall.args[5] = a5; | |
1401 | run->hypercall.ret = ret; | |
1402 | run->hypercall.longmode = is_long_mode(vcpu); | |
1403 | kvm_arch_ops->decache_regs(vcpu); | |
1404 | return 0; | |
270fd9b9 AK |
1405 | } |
1406 | vcpu->regs[VCPU_REGS_RAX] = ret; | |
9b22bf57 | 1407 | kvm_arch_ops->decache_regs(vcpu); |
270fd9b9 AK |
1408 | return 1; |
1409 | } | |
1410 | EXPORT_SYMBOL_GPL(kvm_hypercall); | |
1411 | ||
6aa8b732 AK |
1412 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) |
1413 | { | |
1414 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; | |
1415 | } | |
1416 | ||
1417 | void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
1418 | { | |
1419 | struct descriptor_table dt = { limit, base }; | |
1420 | ||
1421 | kvm_arch_ops->set_gdt(vcpu, &dt); | |
1422 | } | |
1423 | ||
1424 | void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
1425 | { | |
1426 | struct descriptor_table dt = { limit, base }; | |
1427 | ||
1428 | kvm_arch_ops->set_idt(vcpu, &dt); | |
1429 | } | |
1430 | ||
1431 | void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw, | |
1432 | unsigned long *rflags) | |
1433 | { | |
1434 | lmsw(vcpu, msw); | |
1435 | *rflags = kvm_arch_ops->get_rflags(vcpu); | |
1436 | } | |
1437 | ||
1438 | unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr) | |
1439 | { | |
25c4c276 | 1440 | kvm_arch_ops->decache_cr4_guest_bits(vcpu); |
6aa8b732 AK |
1441 | switch (cr) { |
1442 | case 0: | |
1443 | return vcpu->cr0; | |
1444 | case 2: | |
1445 | return vcpu->cr2; | |
1446 | case 3: | |
1447 | return vcpu->cr3; | |
1448 | case 4: | |
1449 | return vcpu->cr4; | |
1450 | default: | |
1451 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr); | |
1452 | return 0; | |
1453 | } | |
1454 | } | |
1455 | ||
1456 | void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val, | |
1457 | unsigned long *rflags) | |
1458 | { | |
1459 | switch (cr) { | |
1460 | case 0: | |
1461 | set_cr0(vcpu, mk_cr_64(vcpu->cr0, val)); | |
1462 | *rflags = kvm_arch_ops->get_rflags(vcpu); | |
1463 | break; | |
1464 | case 2: | |
1465 | vcpu->cr2 = val; | |
1466 | break; | |
1467 | case 3: | |
1468 | set_cr3(vcpu, val); | |
1469 | break; | |
1470 | case 4: | |
1471 | set_cr4(vcpu, mk_cr_64(vcpu->cr4, val)); | |
1472 | break; | |
1473 | default: | |
1474 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr); | |
1475 | } | |
1476 | } | |
1477 | ||
102d8325 IM |
1478 | /* |
1479 | * Register the para guest with the host: | |
1480 | */ | |
1481 | static int vcpu_register_para(struct kvm_vcpu *vcpu, gpa_t para_state_gpa) | |
1482 | { | |
1483 | struct kvm_vcpu_para_state *para_state; | |
1484 | hpa_t para_state_hpa, hypercall_hpa; | |
1485 | struct page *para_state_page; | |
1486 | unsigned char *hypercall; | |
1487 | gpa_t hypercall_gpa; | |
1488 | ||
1489 | printk(KERN_DEBUG "kvm: guest trying to enter paravirtual mode\n"); | |
1490 | printk(KERN_DEBUG ".... para_state_gpa: %08Lx\n", para_state_gpa); | |
1491 | ||
1492 | /* | |
1493 | * Needs to be page aligned: | |
1494 | */ | |
1495 | if (para_state_gpa != PAGE_ALIGN(para_state_gpa)) | |
1496 | goto err_gp; | |
1497 | ||
1498 | para_state_hpa = gpa_to_hpa(vcpu, para_state_gpa); | |
1499 | printk(KERN_DEBUG ".... para_state_hpa: %08Lx\n", para_state_hpa); | |
1500 | if (is_error_hpa(para_state_hpa)) | |
1501 | goto err_gp; | |
1502 | ||
ab51a434 | 1503 | mark_page_dirty(vcpu->kvm, para_state_gpa >> PAGE_SHIFT); |
102d8325 | 1504 | para_state_page = pfn_to_page(para_state_hpa >> PAGE_SHIFT); |
fe551881 | 1505 | para_state = kmap(para_state_page); |
102d8325 IM |
1506 | |
1507 | printk(KERN_DEBUG ".... guest version: %d\n", para_state->guest_version); | |
1508 | printk(KERN_DEBUG ".... size: %d\n", para_state->size); | |
1509 | ||
1510 | para_state->host_version = KVM_PARA_API_VERSION; | |
1511 | /* | |
1512 | * We cannot support guests that try to register themselves | |
1513 | * with a newer API version than the host supports: | |
1514 | */ | |
1515 | if (para_state->guest_version > KVM_PARA_API_VERSION) { | |
1516 | para_state->ret = -KVM_EINVAL; | |
1517 | goto err_kunmap_skip; | |
1518 | } | |
1519 | ||
1520 | hypercall_gpa = para_state->hypercall_gpa; | |
1521 | hypercall_hpa = gpa_to_hpa(vcpu, hypercall_gpa); | |
1522 | printk(KERN_DEBUG ".... hypercall_hpa: %08Lx\n", hypercall_hpa); | |
1523 | if (is_error_hpa(hypercall_hpa)) { | |
1524 | para_state->ret = -KVM_EINVAL; | |
1525 | goto err_kunmap_skip; | |
1526 | } | |
1527 | ||
1528 | printk(KERN_DEBUG "kvm: para guest successfully registered.\n"); | |
1529 | vcpu->para_state_page = para_state_page; | |
1530 | vcpu->para_state_gpa = para_state_gpa; | |
1531 | vcpu->hypercall_gpa = hypercall_gpa; | |
1532 | ||
ab51a434 | 1533 | mark_page_dirty(vcpu->kvm, hypercall_gpa >> PAGE_SHIFT); |
102d8325 IM |
1534 | hypercall = kmap_atomic(pfn_to_page(hypercall_hpa >> PAGE_SHIFT), |
1535 | KM_USER1) + (hypercall_hpa & ~PAGE_MASK); | |
1536 | kvm_arch_ops->patch_hypercall(vcpu, hypercall); | |
1537 | kunmap_atomic(hypercall, KM_USER1); | |
1538 | ||
1539 | para_state->ret = 0; | |
1540 | err_kunmap_skip: | |
fe551881 | 1541 | kunmap(para_state_page); |
102d8325 IM |
1542 | return 0; |
1543 | err_gp: | |
1544 | return 1; | |
1545 | } | |
1546 | ||
3bab1f5d AK |
1547 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
1548 | { | |
1549 | u64 data; | |
1550 | ||
1551 | switch (msr) { | |
1552 | case 0xc0010010: /* SYSCFG */ | |
1553 | case 0xc0010015: /* HWCR */ | |
1554 | case MSR_IA32_PLATFORM_ID: | |
1555 | case MSR_IA32_P5_MC_ADDR: | |
1556 | case MSR_IA32_P5_MC_TYPE: | |
1557 | case MSR_IA32_MC0_CTL: | |
1558 | case MSR_IA32_MCG_STATUS: | |
1559 | case MSR_IA32_MCG_CAP: | |
1560 | case MSR_IA32_MC0_MISC: | |
1561 | case MSR_IA32_MC0_MISC+4: | |
1562 | case MSR_IA32_MC0_MISC+8: | |
1563 | case MSR_IA32_MC0_MISC+12: | |
1564 | case MSR_IA32_MC0_MISC+16: | |
1565 | case MSR_IA32_UCODE_REV: | |
a8d13ea2 | 1566 | case MSR_IA32_PERF_STATUS: |
2dc7094b | 1567 | case MSR_IA32_EBL_CR_POWERON: |
3bab1f5d AK |
1568 | /* MTRR registers */ |
1569 | case 0xfe: | |
1570 | case 0x200 ... 0x2ff: | |
1571 | data = 0; | |
1572 | break; | |
a8d13ea2 AK |
1573 | case 0xcd: /* fsb frequency */ |
1574 | data = 3; | |
1575 | break; | |
3bab1f5d AK |
1576 | case MSR_IA32_APICBASE: |
1577 | data = vcpu->apic_base; | |
1578 | break; | |
6f00e68f AK |
1579 | case MSR_IA32_MISC_ENABLE: |
1580 | data = vcpu->ia32_misc_enable_msr; | |
1581 | break; | |
3bab1f5d AK |
1582 | #ifdef CONFIG_X86_64 |
1583 | case MSR_EFER: | |
1584 | data = vcpu->shadow_efer; | |
1585 | break; | |
1586 | #endif | |
1587 | default: | |
1588 | printk(KERN_ERR "kvm: unhandled rdmsr: 0x%x\n", msr); | |
1589 | return 1; | |
1590 | } | |
1591 | *pdata = data; | |
1592 | return 0; | |
1593 | } | |
1594 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); | |
1595 | ||
6aa8b732 AK |
1596 | /* |
1597 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
1598 | * Returns 0 on success, non-0 otherwise. | |
1599 | * Assumes vcpu_load() was already called. | |
1600 | */ | |
35f3f286 | 1601 | int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) |
6aa8b732 AK |
1602 | { |
1603 | return kvm_arch_ops->get_msr(vcpu, msr_index, pdata); | |
1604 | } | |
1605 | ||
05b3e0c2 | 1606 | #ifdef CONFIG_X86_64 |
6aa8b732 | 1607 | |
3bab1f5d | 1608 | static void set_efer(struct kvm_vcpu *vcpu, u64 efer) |
6aa8b732 | 1609 | { |
6aa8b732 AK |
1610 | if (efer & EFER_RESERVED_BITS) { |
1611 | printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n", | |
1612 | efer); | |
1613 | inject_gp(vcpu); | |
1614 | return; | |
1615 | } | |
1616 | ||
1617 | if (is_paging(vcpu) | |
1618 | && (vcpu->shadow_efer & EFER_LME) != (efer & EFER_LME)) { | |
1619 | printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n"); | |
1620 | inject_gp(vcpu); | |
1621 | return; | |
1622 | } | |
1623 | ||
7725f0ba AK |
1624 | kvm_arch_ops->set_efer(vcpu, efer); |
1625 | ||
6aa8b732 AK |
1626 | efer &= ~EFER_LMA; |
1627 | efer |= vcpu->shadow_efer & EFER_LMA; | |
1628 | ||
1629 | vcpu->shadow_efer = efer; | |
6aa8b732 | 1630 | } |
6aa8b732 AK |
1631 | |
1632 | #endif | |
1633 | ||
3bab1f5d AK |
1634 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
1635 | { | |
1636 | switch (msr) { | |
1637 | #ifdef CONFIG_X86_64 | |
1638 | case MSR_EFER: | |
1639 | set_efer(vcpu, data); | |
1640 | break; | |
1641 | #endif | |
1642 | case MSR_IA32_MC0_STATUS: | |
1643 | printk(KERN_WARNING "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n", | |
1644 | __FUNCTION__, data); | |
1645 | break; | |
0e5bf0d0 SK |
1646 | case MSR_IA32_MCG_STATUS: |
1647 | printk(KERN_WARNING "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n", | |
1648 | __FUNCTION__, data); | |
1649 | break; | |
3bab1f5d AK |
1650 | case MSR_IA32_UCODE_REV: |
1651 | case MSR_IA32_UCODE_WRITE: | |
1652 | case 0x200 ... 0x2ff: /* MTRRs */ | |
1653 | break; | |
1654 | case MSR_IA32_APICBASE: | |
1655 | vcpu->apic_base = data; | |
1656 | break; | |
6f00e68f AK |
1657 | case MSR_IA32_MISC_ENABLE: |
1658 | vcpu->ia32_misc_enable_msr = data; | |
1659 | break; | |
102d8325 IM |
1660 | /* |
1661 | * This is the 'probe whether the host is KVM' logic: | |
1662 | */ | |
1663 | case MSR_KVM_API_MAGIC: | |
1664 | return vcpu_register_para(vcpu, data); | |
1665 | ||
3bab1f5d AK |
1666 | default: |
1667 | printk(KERN_ERR "kvm: unhandled wrmsr: 0x%x\n", msr); | |
1668 | return 1; | |
1669 | } | |
1670 | return 0; | |
1671 | } | |
1672 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); | |
1673 | ||
6aa8b732 AK |
1674 | /* |
1675 | * Writes msr value into into the appropriate "register". | |
1676 | * Returns 0 on success, non-0 otherwise. | |
1677 | * Assumes vcpu_load() was already called. | |
1678 | */ | |
35f3f286 | 1679 | int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) |
6aa8b732 AK |
1680 | { |
1681 | return kvm_arch_ops->set_msr(vcpu, msr_index, data); | |
1682 | } | |
1683 | ||
1684 | void kvm_resched(struct kvm_vcpu *vcpu) | |
1685 | { | |
3fca0365 YD |
1686 | if (!need_resched()) |
1687 | return; | |
6aa8b732 | 1688 | cond_resched(); |
6aa8b732 AK |
1689 | } |
1690 | EXPORT_SYMBOL_GPL(kvm_resched); | |
1691 | ||
06465c5a AK |
1692 | void kvm_emulate_cpuid(struct kvm_vcpu *vcpu) |
1693 | { | |
1694 | int i; | |
1695 | u32 function; | |
1696 | struct kvm_cpuid_entry *e, *best; | |
1697 | ||
1698 | kvm_arch_ops->cache_regs(vcpu); | |
1699 | function = vcpu->regs[VCPU_REGS_RAX]; | |
1700 | vcpu->regs[VCPU_REGS_RAX] = 0; | |
1701 | vcpu->regs[VCPU_REGS_RBX] = 0; | |
1702 | vcpu->regs[VCPU_REGS_RCX] = 0; | |
1703 | vcpu->regs[VCPU_REGS_RDX] = 0; | |
1704 | best = NULL; | |
1705 | for (i = 0; i < vcpu->cpuid_nent; ++i) { | |
1706 | e = &vcpu->cpuid_entries[i]; | |
1707 | if (e->function == function) { | |
1708 | best = e; | |
1709 | break; | |
1710 | } | |
1711 | /* | |
1712 | * Both basic or both extended? | |
1713 | */ | |
1714 | if (((e->function ^ function) & 0x80000000) == 0) | |
1715 | if (!best || e->function > best->function) | |
1716 | best = e; | |
1717 | } | |
1718 | if (best) { | |
1719 | vcpu->regs[VCPU_REGS_RAX] = best->eax; | |
1720 | vcpu->regs[VCPU_REGS_RBX] = best->ebx; | |
1721 | vcpu->regs[VCPU_REGS_RCX] = best->ecx; | |
1722 | vcpu->regs[VCPU_REGS_RDX] = best->edx; | |
1723 | } | |
1724 | kvm_arch_ops->decache_regs(vcpu); | |
1725 | kvm_arch_ops->skip_emulated_instruction(vcpu); | |
1726 | } | |
1727 | EXPORT_SYMBOL_GPL(kvm_emulate_cpuid); | |
1728 | ||
039576c0 | 1729 | static int pio_copy_data(struct kvm_vcpu *vcpu) |
46fc1477 | 1730 | { |
039576c0 AK |
1731 | void *p = vcpu->pio_data; |
1732 | void *q; | |
1733 | unsigned bytes; | |
1734 | int nr_pages = vcpu->pio.guest_pages[1] ? 2 : 1; | |
1735 | ||
039576c0 AK |
1736 | q = vmap(vcpu->pio.guest_pages, nr_pages, VM_READ|VM_WRITE, |
1737 | PAGE_KERNEL); | |
1738 | if (!q) { | |
039576c0 AK |
1739 | free_pio_guest_pages(vcpu); |
1740 | return -ENOMEM; | |
1741 | } | |
1742 | q += vcpu->pio.guest_page_offset; | |
1743 | bytes = vcpu->pio.size * vcpu->pio.cur_count; | |
1744 | if (vcpu->pio.in) | |
1745 | memcpy(q, p, bytes); | |
1746 | else | |
1747 | memcpy(p, q, bytes); | |
1748 | q -= vcpu->pio.guest_page_offset; | |
1749 | vunmap(q); | |
039576c0 AK |
1750 | free_pio_guest_pages(vcpu); |
1751 | return 0; | |
1752 | } | |
1753 | ||
1754 | static int complete_pio(struct kvm_vcpu *vcpu) | |
1755 | { | |
1756 | struct kvm_pio_request *io = &vcpu->pio; | |
46fc1477 | 1757 | long delta; |
039576c0 | 1758 | int r; |
46fc1477 AK |
1759 | |
1760 | kvm_arch_ops->cache_regs(vcpu); | |
1761 | ||
1762 | if (!io->string) { | |
039576c0 AK |
1763 | if (io->in) |
1764 | memcpy(&vcpu->regs[VCPU_REGS_RAX], vcpu->pio_data, | |
46fc1477 AK |
1765 | io->size); |
1766 | } else { | |
039576c0 AK |
1767 | if (io->in) { |
1768 | r = pio_copy_data(vcpu); | |
1769 | if (r) { | |
1770 | kvm_arch_ops->cache_regs(vcpu); | |
1771 | return r; | |
1772 | } | |
1773 | } | |
1774 | ||
46fc1477 AK |
1775 | delta = 1; |
1776 | if (io->rep) { | |
039576c0 | 1777 | delta *= io->cur_count; |
46fc1477 AK |
1778 | /* |
1779 | * The size of the register should really depend on | |
1780 | * current address size. | |
1781 | */ | |
1782 | vcpu->regs[VCPU_REGS_RCX] -= delta; | |
1783 | } | |
039576c0 | 1784 | if (io->down) |
46fc1477 AK |
1785 | delta = -delta; |
1786 | delta *= io->size; | |
039576c0 | 1787 | if (io->in) |
46fc1477 AK |
1788 | vcpu->regs[VCPU_REGS_RDI] += delta; |
1789 | else | |
1790 | vcpu->regs[VCPU_REGS_RSI] += delta; | |
1791 | } | |
1792 | ||
46fc1477 AK |
1793 | kvm_arch_ops->decache_regs(vcpu); |
1794 | ||
039576c0 AK |
1795 | io->count -= io->cur_count; |
1796 | io->cur_count = 0; | |
1797 | ||
1798 | if (!io->count) | |
1799 | kvm_arch_ops->skip_emulated_instruction(vcpu); | |
1800 | return 0; | |
46fc1477 AK |
1801 | } |
1802 | ||
65619eb5 ED |
1803 | static void kernel_pio(struct kvm_io_device *pio_dev, |
1804 | struct kvm_vcpu *vcpu, | |
1805 | void *pd) | |
74906345 ED |
1806 | { |
1807 | /* TODO: String I/O for in kernel device */ | |
1808 | ||
1809 | if (vcpu->pio.in) | |
1810 | kvm_iodevice_read(pio_dev, vcpu->pio.port, | |
1811 | vcpu->pio.size, | |
65619eb5 | 1812 | pd); |
74906345 ED |
1813 | else |
1814 | kvm_iodevice_write(pio_dev, vcpu->pio.port, | |
1815 | vcpu->pio.size, | |
65619eb5 ED |
1816 | pd); |
1817 | } | |
1818 | ||
1819 | static void pio_string_write(struct kvm_io_device *pio_dev, | |
1820 | struct kvm_vcpu *vcpu) | |
1821 | { | |
1822 | struct kvm_pio_request *io = &vcpu->pio; | |
1823 | void *pd = vcpu->pio_data; | |
1824 | int i; | |
1825 | ||
1826 | for (i = 0; i < io->cur_count; i++) { | |
1827 | kvm_iodevice_write(pio_dev, io->port, | |
1828 | io->size, | |
1829 | pd); | |
1830 | pd += io->size; | |
1831 | } | |
74906345 ED |
1832 | } |
1833 | ||
039576c0 AK |
1834 | int kvm_setup_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, |
1835 | int size, unsigned long count, int string, int down, | |
1836 | gva_t address, int rep, unsigned port) | |
1837 | { | |
1838 | unsigned now, in_page; | |
65619eb5 | 1839 | int i, ret = 0; |
039576c0 AK |
1840 | int nr_pages = 1; |
1841 | struct page *page; | |
74906345 | 1842 | struct kvm_io_device *pio_dev; |
039576c0 AK |
1843 | |
1844 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
1845 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; | |
1846 | vcpu->run->io.size = size; | |
1847 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; | |
1848 | vcpu->run->io.count = count; | |
1849 | vcpu->run->io.port = port; | |
1850 | vcpu->pio.count = count; | |
1851 | vcpu->pio.cur_count = count; | |
1852 | vcpu->pio.size = size; | |
1853 | vcpu->pio.in = in; | |
74906345 | 1854 | vcpu->pio.port = port; |
039576c0 AK |
1855 | vcpu->pio.string = string; |
1856 | vcpu->pio.down = down; | |
1857 | vcpu->pio.guest_page_offset = offset_in_page(address); | |
1858 | vcpu->pio.rep = rep; | |
1859 | ||
74906345 | 1860 | pio_dev = vcpu_find_pio_dev(vcpu, port); |
039576c0 AK |
1861 | if (!string) { |
1862 | kvm_arch_ops->cache_regs(vcpu); | |
1863 | memcpy(vcpu->pio_data, &vcpu->regs[VCPU_REGS_RAX], 4); | |
1864 | kvm_arch_ops->decache_regs(vcpu); | |
74906345 | 1865 | if (pio_dev) { |
65619eb5 | 1866 | kernel_pio(pio_dev, vcpu, vcpu->pio_data); |
74906345 ED |
1867 | complete_pio(vcpu); |
1868 | return 1; | |
1869 | } | |
039576c0 AK |
1870 | return 0; |
1871 | } | |
1872 | ||
1873 | if (!count) { | |
1874 | kvm_arch_ops->skip_emulated_instruction(vcpu); | |
1875 | return 1; | |
1876 | } | |
1877 | ||
1878 | now = min(count, PAGE_SIZE / size); | |
1879 | ||
1880 | if (!down) | |
1881 | in_page = PAGE_SIZE - offset_in_page(address); | |
1882 | else | |
1883 | in_page = offset_in_page(address) + size; | |
1884 | now = min(count, (unsigned long)in_page / size); | |
1885 | if (!now) { | |
1886 | /* | |
1887 | * String I/O straddles page boundary. Pin two guest pages | |
1888 | * so that we satisfy atomicity constraints. Do just one | |
1889 | * transaction to avoid complexity. | |
1890 | */ | |
1891 | nr_pages = 2; | |
1892 | now = 1; | |
1893 | } | |
1894 | if (down) { | |
1895 | /* | |
1896 | * String I/O in reverse. Yuck. Kill the guest, fix later. | |
1897 | */ | |
1898 | printk(KERN_ERR "kvm: guest string pio down\n"); | |
1899 | inject_gp(vcpu); | |
1900 | return 1; | |
1901 | } | |
1902 | vcpu->run->io.count = now; | |
1903 | vcpu->pio.cur_count = now; | |
1904 | ||
1905 | for (i = 0; i < nr_pages; ++i) { | |
11ec2804 | 1906 | mutex_lock(&vcpu->kvm->lock); |
039576c0 AK |
1907 | page = gva_to_page(vcpu, address + i * PAGE_SIZE); |
1908 | if (page) | |
1909 | get_page(page); | |
1910 | vcpu->pio.guest_pages[i] = page; | |
11ec2804 | 1911 | mutex_unlock(&vcpu->kvm->lock); |
039576c0 AK |
1912 | if (!page) { |
1913 | inject_gp(vcpu); | |
1914 | free_pio_guest_pages(vcpu); | |
1915 | return 1; | |
1916 | } | |
1917 | } | |
1918 | ||
65619eb5 ED |
1919 | if (!vcpu->pio.in) { |
1920 | /* string PIO write */ | |
1921 | ret = pio_copy_data(vcpu); | |
1922 | if (ret >= 0 && pio_dev) { | |
1923 | pio_string_write(pio_dev, vcpu); | |
1924 | complete_pio(vcpu); | |
1925 | if (vcpu->pio.count == 0) | |
1926 | ret = 1; | |
1927 | } | |
1928 | } else if (pio_dev) | |
1929 | printk(KERN_ERR "no string pio read support yet, " | |
1930 | "port %x size %d count %ld\n", | |
1931 | port, size, count); | |
1932 | ||
1933 | return ret; | |
039576c0 AK |
1934 | } |
1935 | EXPORT_SYMBOL_GPL(kvm_setup_pio); | |
1936 | ||
bccf2150 | 1937 | static int kvm_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
6aa8b732 | 1938 | { |
6aa8b732 | 1939 | int r; |
1961d276 | 1940 | sigset_t sigsaved; |
6aa8b732 | 1941 | |
bccf2150 | 1942 | vcpu_load(vcpu); |
6aa8b732 | 1943 | |
1961d276 AK |
1944 | if (vcpu->sigset_active) |
1945 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
1946 | ||
54810342 DL |
1947 | /* re-sync apic's tpr */ |
1948 | vcpu->cr8 = kvm_run->cr8; | |
1949 | ||
02c83209 AK |
1950 | if (vcpu->pio.cur_count) { |
1951 | r = complete_pio(vcpu); | |
1952 | if (r) | |
1953 | goto out; | |
1954 | } | |
1955 | ||
1956 | if (vcpu->mmio_needed) { | |
1957 | memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8); | |
1958 | vcpu->mmio_read_completed = 1; | |
1959 | vcpu->mmio_needed = 0; | |
1960 | r = emulate_instruction(vcpu, kvm_run, | |
1961 | vcpu->mmio_fault_cr2, 0); | |
1962 | if (r == EMULATE_DO_MMIO) { | |
1963 | /* | |
1964 | * Read-modify-write. Back to userspace. | |
1965 | */ | |
02c83209 AK |
1966 | r = 0; |
1967 | goto out; | |
46fc1477 | 1968 | } |
6aa8b732 AK |
1969 | } |
1970 | ||
8eb7d334 | 1971 | if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) { |
b4e63f56 AK |
1972 | kvm_arch_ops->cache_regs(vcpu); |
1973 | vcpu->regs[VCPU_REGS_RAX] = kvm_run->hypercall.ret; | |
1974 | kvm_arch_ops->decache_regs(vcpu); | |
1975 | } | |
1976 | ||
6aa8b732 AK |
1977 | r = kvm_arch_ops->run(vcpu, kvm_run); |
1978 | ||
039576c0 | 1979 | out: |
1961d276 AK |
1980 | if (vcpu->sigset_active) |
1981 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
1982 | ||
6aa8b732 AK |
1983 | vcpu_put(vcpu); |
1984 | return r; | |
1985 | } | |
1986 | ||
bccf2150 AK |
1987 | static int kvm_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, |
1988 | struct kvm_regs *regs) | |
6aa8b732 | 1989 | { |
bccf2150 | 1990 | vcpu_load(vcpu); |
6aa8b732 AK |
1991 | |
1992 | kvm_arch_ops->cache_regs(vcpu); | |
1993 | ||
1994 | regs->rax = vcpu->regs[VCPU_REGS_RAX]; | |
1995 | regs->rbx = vcpu->regs[VCPU_REGS_RBX]; | |
1996 | regs->rcx = vcpu->regs[VCPU_REGS_RCX]; | |
1997 | regs->rdx = vcpu->regs[VCPU_REGS_RDX]; | |
1998 | regs->rsi = vcpu->regs[VCPU_REGS_RSI]; | |
1999 | regs->rdi = vcpu->regs[VCPU_REGS_RDI]; | |
2000 | regs->rsp = vcpu->regs[VCPU_REGS_RSP]; | |
2001 | regs->rbp = vcpu->regs[VCPU_REGS_RBP]; | |
05b3e0c2 | 2002 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
2003 | regs->r8 = vcpu->regs[VCPU_REGS_R8]; |
2004 | regs->r9 = vcpu->regs[VCPU_REGS_R9]; | |
2005 | regs->r10 = vcpu->regs[VCPU_REGS_R10]; | |
2006 | regs->r11 = vcpu->regs[VCPU_REGS_R11]; | |
2007 | regs->r12 = vcpu->regs[VCPU_REGS_R12]; | |
2008 | regs->r13 = vcpu->regs[VCPU_REGS_R13]; | |
2009 | regs->r14 = vcpu->regs[VCPU_REGS_R14]; | |
2010 | regs->r15 = vcpu->regs[VCPU_REGS_R15]; | |
2011 | #endif | |
2012 | ||
2013 | regs->rip = vcpu->rip; | |
2014 | regs->rflags = kvm_arch_ops->get_rflags(vcpu); | |
2015 | ||
2016 | /* | |
2017 | * Don't leak debug flags in case they were set for guest debugging | |
2018 | */ | |
2019 | if (vcpu->guest_debug.enabled && vcpu->guest_debug.singlestep) | |
2020 | regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF); | |
2021 | ||
2022 | vcpu_put(vcpu); | |
2023 | ||
2024 | return 0; | |
2025 | } | |
2026 | ||
bccf2150 AK |
2027 | static int kvm_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, |
2028 | struct kvm_regs *regs) | |
6aa8b732 | 2029 | { |
bccf2150 | 2030 | vcpu_load(vcpu); |
6aa8b732 AK |
2031 | |
2032 | vcpu->regs[VCPU_REGS_RAX] = regs->rax; | |
2033 | vcpu->regs[VCPU_REGS_RBX] = regs->rbx; | |
2034 | vcpu->regs[VCPU_REGS_RCX] = regs->rcx; | |
2035 | vcpu->regs[VCPU_REGS_RDX] = regs->rdx; | |
2036 | vcpu->regs[VCPU_REGS_RSI] = regs->rsi; | |
2037 | vcpu->regs[VCPU_REGS_RDI] = regs->rdi; | |
2038 | vcpu->regs[VCPU_REGS_RSP] = regs->rsp; | |
2039 | vcpu->regs[VCPU_REGS_RBP] = regs->rbp; | |
05b3e0c2 | 2040 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
2041 | vcpu->regs[VCPU_REGS_R8] = regs->r8; |
2042 | vcpu->regs[VCPU_REGS_R9] = regs->r9; | |
2043 | vcpu->regs[VCPU_REGS_R10] = regs->r10; | |
2044 | vcpu->regs[VCPU_REGS_R11] = regs->r11; | |
2045 | vcpu->regs[VCPU_REGS_R12] = regs->r12; | |
2046 | vcpu->regs[VCPU_REGS_R13] = regs->r13; | |
2047 | vcpu->regs[VCPU_REGS_R14] = regs->r14; | |
2048 | vcpu->regs[VCPU_REGS_R15] = regs->r15; | |
2049 | #endif | |
2050 | ||
2051 | vcpu->rip = regs->rip; | |
2052 | kvm_arch_ops->set_rflags(vcpu, regs->rflags); | |
2053 | ||
2054 | kvm_arch_ops->decache_regs(vcpu); | |
2055 | ||
2056 | vcpu_put(vcpu); | |
2057 | ||
2058 | return 0; | |
2059 | } | |
2060 | ||
2061 | static void get_segment(struct kvm_vcpu *vcpu, | |
2062 | struct kvm_segment *var, int seg) | |
2063 | { | |
2064 | return kvm_arch_ops->get_segment(vcpu, var, seg); | |
2065 | } | |
2066 | ||
bccf2150 AK |
2067 | static int kvm_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, |
2068 | struct kvm_sregs *sregs) | |
6aa8b732 | 2069 | { |
6aa8b732 AK |
2070 | struct descriptor_table dt; |
2071 | ||
bccf2150 | 2072 | vcpu_load(vcpu); |
6aa8b732 AK |
2073 | |
2074 | get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); | |
2075 | get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
2076 | get_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
2077 | get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
2078 | get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
2079 | get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
2080 | ||
2081 | get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); | |
2082 | get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
2083 | ||
2084 | kvm_arch_ops->get_idt(vcpu, &dt); | |
2085 | sregs->idt.limit = dt.limit; | |
2086 | sregs->idt.base = dt.base; | |
2087 | kvm_arch_ops->get_gdt(vcpu, &dt); | |
2088 | sregs->gdt.limit = dt.limit; | |
2089 | sregs->gdt.base = dt.base; | |
2090 | ||
25c4c276 | 2091 | kvm_arch_ops->decache_cr4_guest_bits(vcpu); |
6aa8b732 AK |
2092 | sregs->cr0 = vcpu->cr0; |
2093 | sregs->cr2 = vcpu->cr2; | |
2094 | sregs->cr3 = vcpu->cr3; | |
2095 | sregs->cr4 = vcpu->cr4; | |
2096 | sregs->cr8 = vcpu->cr8; | |
2097 | sregs->efer = vcpu->shadow_efer; | |
2098 | sregs->apic_base = vcpu->apic_base; | |
2099 | ||
2100 | memcpy(sregs->interrupt_bitmap, vcpu->irq_pending, | |
2101 | sizeof sregs->interrupt_bitmap); | |
2102 | ||
2103 | vcpu_put(vcpu); | |
2104 | ||
2105 | return 0; | |
2106 | } | |
2107 | ||
2108 | static void set_segment(struct kvm_vcpu *vcpu, | |
2109 | struct kvm_segment *var, int seg) | |
2110 | { | |
2111 | return kvm_arch_ops->set_segment(vcpu, var, seg); | |
2112 | } | |
2113 | ||
bccf2150 AK |
2114 | static int kvm_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
2115 | struct kvm_sregs *sregs) | |
6aa8b732 | 2116 | { |
6aa8b732 AK |
2117 | int mmu_reset_needed = 0; |
2118 | int i; | |
2119 | struct descriptor_table dt; | |
2120 | ||
bccf2150 | 2121 | vcpu_load(vcpu); |
6aa8b732 | 2122 | |
6aa8b732 AK |
2123 | dt.limit = sregs->idt.limit; |
2124 | dt.base = sregs->idt.base; | |
2125 | kvm_arch_ops->set_idt(vcpu, &dt); | |
2126 | dt.limit = sregs->gdt.limit; | |
2127 | dt.base = sregs->gdt.base; | |
2128 | kvm_arch_ops->set_gdt(vcpu, &dt); | |
2129 | ||
2130 | vcpu->cr2 = sregs->cr2; | |
2131 | mmu_reset_needed |= vcpu->cr3 != sregs->cr3; | |
2132 | vcpu->cr3 = sregs->cr3; | |
2133 | ||
2134 | vcpu->cr8 = sregs->cr8; | |
2135 | ||
2136 | mmu_reset_needed |= vcpu->shadow_efer != sregs->efer; | |
05b3e0c2 | 2137 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
2138 | kvm_arch_ops->set_efer(vcpu, sregs->efer); |
2139 | #endif | |
2140 | vcpu->apic_base = sregs->apic_base; | |
2141 | ||
25c4c276 | 2142 | kvm_arch_ops->decache_cr4_guest_bits(vcpu); |
399badf3 | 2143 | |
6aa8b732 | 2144 | mmu_reset_needed |= vcpu->cr0 != sregs->cr0; |
f6528b03 | 2145 | kvm_arch_ops->set_cr0(vcpu, sregs->cr0); |
6aa8b732 AK |
2146 | |
2147 | mmu_reset_needed |= vcpu->cr4 != sregs->cr4; | |
2148 | kvm_arch_ops->set_cr4(vcpu, sregs->cr4); | |
1b0973bd AK |
2149 | if (!is_long_mode(vcpu) && is_pae(vcpu)) |
2150 | load_pdptrs(vcpu, vcpu->cr3); | |
6aa8b732 AK |
2151 | |
2152 | if (mmu_reset_needed) | |
2153 | kvm_mmu_reset_context(vcpu); | |
2154 | ||
2155 | memcpy(vcpu->irq_pending, sregs->interrupt_bitmap, | |
2156 | sizeof vcpu->irq_pending); | |
2157 | vcpu->irq_summary = 0; | |
9eb829ce | 2158 | for (i = 0; i < ARRAY_SIZE(vcpu->irq_pending); ++i) |
6aa8b732 AK |
2159 | if (vcpu->irq_pending[i]) |
2160 | __set_bit(i, &vcpu->irq_summary); | |
2161 | ||
024aa1c0 AK |
2162 | set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
2163 | set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
2164 | set_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
2165 | set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
2166 | set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
2167 | set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
2168 | ||
2169 | set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); | |
2170 | set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
2171 | ||
6aa8b732 AK |
2172 | vcpu_put(vcpu); |
2173 | ||
2174 | return 0; | |
2175 | } | |
2176 | ||
2177 | /* | |
2178 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS | |
2179 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. | |
bf591b24 MR |
2180 | * |
2181 | * This list is modified at module load time to reflect the | |
2182 | * capabilities of the host cpu. | |
6aa8b732 AK |
2183 | */ |
2184 | static u32 msrs_to_save[] = { | |
2185 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, | |
2186 | MSR_K6_STAR, | |
05b3e0c2 | 2187 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
2188 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, |
2189 | #endif | |
2190 | MSR_IA32_TIME_STAMP_COUNTER, | |
2191 | }; | |
2192 | ||
bf591b24 MR |
2193 | static unsigned num_msrs_to_save; |
2194 | ||
6f00e68f AK |
2195 | static u32 emulated_msrs[] = { |
2196 | MSR_IA32_MISC_ENABLE, | |
2197 | }; | |
2198 | ||
bf591b24 MR |
2199 | static __init void kvm_init_msr_list(void) |
2200 | { | |
2201 | u32 dummy[2]; | |
2202 | unsigned i, j; | |
2203 | ||
2204 | for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) { | |
2205 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) | |
2206 | continue; | |
2207 | if (j < i) | |
2208 | msrs_to_save[j] = msrs_to_save[i]; | |
2209 | j++; | |
2210 | } | |
2211 | num_msrs_to_save = j; | |
2212 | } | |
6aa8b732 AK |
2213 | |
2214 | /* | |
2215 | * Adapt set_msr() to msr_io()'s calling convention | |
2216 | */ | |
2217 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) | |
2218 | { | |
35f3f286 | 2219 | return kvm_set_msr(vcpu, index, *data); |
6aa8b732 AK |
2220 | } |
2221 | ||
2222 | /* | |
2223 | * Read or write a bunch of msrs. All parameters are kernel addresses. | |
2224 | * | |
2225 | * @return number of msrs set successfully. | |
2226 | */ | |
bccf2150 | 2227 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, |
6aa8b732 AK |
2228 | struct kvm_msr_entry *entries, |
2229 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
2230 | unsigned index, u64 *data)) | |
2231 | { | |
6aa8b732 AK |
2232 | int i; |
2233 | ||
bccf2150 | 2234 | vcpu_load(vcpu); |
6aa8b732 AK |
2235 | |
2236 | for (i = 0; i < msrs->nmsrs; ++i) | |
2237 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) | |
2238 | break; | |
2239 | ||
2240 | vcpu_put(vcpu); | |
2241 | ||
2242 | return i; | |
2243 | } | |
2244 | ||
2245 | /* | |
2246 | * Read or write a bunch of msrs. Parameters are user addresses. | |
2247 | * | |
2248 | * @return number of msrs set successfully. | |
2249 | */ | |
bccf2150 | 2250 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, |
6aa8b732 AK |
2251 | int (*do_msr)(struct kvm_vcpu *vcpu, |
2252 | unsigned index, u64 *data), | |
2253 | int writeback) | |
2254 | { | |
2255 | struct kvm_msrs msrs; | |
2256 | struct kvm_msr_entry *entries; | |
2257 | int r, n; | |
2258 | unsigned size; | |
2259 | ||
2260 | r = -EFAULT; | |
2261 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) | |
2262 | goto out; | |
2263 | ||
2264 | r = -E2BIG; | |
2265 | if (msrs.nmsrs >= MAX_IO_MSRS) | |
2266 | goto out; | |
2267 | ||
2268 | r = -ENOMEM; | |
2269 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; | |
2270 | entries = vmalloc(size); | |
2271 | if (!entries) | |
2272 | goto out; | |
2273 | ||
2274 | r = -EFAULT; | |
2275 | if (copy_from_user(entries, user_msrs->entries, size)) | |
2276 | goto out_free; | |
2277 | ||
bccf2150 | 2278 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); |
6aa8b732 AK |
2279 | if (r < 0) |
2280 | goto out_free; | |
2281 | ||
2282 | r = -EFAULT; | |
2283 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) | |
2284 | goto out_free; | |
2285 | ||
2286 | r = n; | |
2287 | ||
2288 | out_free: | |
2289 | vfree(entries); | |
2290 | out: | |
2291 | return r; | |
2292 | } | |
2293 | ||
2294 | /* | |
2295 | * Translate a guest virtual address to a guest physical address. | |
2296 | */ | |
bccf2150 AK |
2297 | static int kvm_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, |
2298 | struct kvm_translation *tr) | |
6aa8b732 AK |
2299 | { |
2300 | unsigned long vaddr = tr->linear_address; | |
6aa8b732 AK |
2301 | gpa_t gpa; |
2302 | ||
bccf2150 | 2303 | vcpu_load(vcpu); |
11ec2804 | 2304 | mutex_lock(&vcpu->kvm->lock); |
6aa8b732 AK |
2305 | gpa = vcpu->mmu.gva_to_gpa(vcpu, vaddr); |
2306 | tr->physical_address = gpa; | |
2307 | tr->valid = gpa != UNMAPPED_GVA; | |
2308 | tr->writeable = 1; | |
2309 | tr->usermode = 0; | |
11ec2804 | 2310 | mutex_unlock(&vcpu->kvm->lock); |
6aa8b732 AK |
2311 | vcpu_put(vcpu); |
2312 | ||
2313 | return 0; | |
2314 | } | |
2315 | ||
bccf2150 AK |
2316 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
2317 | struct kvm_interrupt *irq) | |
6aa8b732 | 2318 | { |
6aa8b732 AK |
2319 | if (irq->irq < 0 || irq->irq >= 256) |
2320 | return -EINVAL; | |
bccf2150 | 2321 | vcpu_load(vcpu); |
6aa8b732 AK |
2322 | |
2323 | set_bit(irq->irq, vcpu->irq_pending); | |
2324 | set_bit(irq->irq / BITS_PER_LONG, &vcpu->irq_summary); | |
2325 | ||
2326 | vcpu_put(vcpu); | |
2327 | ||
2328 | return 0; | |
2329 | } | |
2330 | ||
bccf2150 AK |
2331 | static int kvm_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu, |
2332 | struct kvm_debug_guest *dbg) | |
6aa8b732 | 2333 | { |
6aa8b732 AK |
2334 | int r; |
2335 | ||
bccf2150 | 2336 | vcpu_load(vcpu); |
6aa8b732 AK |
2337 | |
2338 | r = kvm_arch_ops->set_guest_debug(vcpu, dbg); | |
2339 | ||
2340 | vcpu_put(vcpu); | |
2341 | ||
2342 | return r; | |
2343 | } | |
2344 | ||
9a2bb7f4 AK |
2345 | static struct page *kvm_vcpu_nopage(struct vm_area_struct *vma, |
2346 | unsigned long address, | |
2347 | int *type) | |
2348 | { | |
2349 | struct kvm_vcpu *vcpu = vma->vm_file->private_data; | |
2350 | unsigned long pgoff; | |
2351 | struct page *page; | |
2352 | ||
9a2bb7f4 | 2353 | pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff; |
039576c0 AK |
2354 | if (pgoff == 0) |
2355 | page = virt_to_page(vcpu->run); | |
2356 | else if (pgoff == KVM_PIO_PAGE_OFFSET) | |
2357 | page = virt_to_page(vcpu->pio_data); | |
2358 | else | |
9a2bb7f4 | 2359 | return NOPAGE_SIGBUS; |
9a2bb7f4 | 2360 | get_page(page); |
cd0d9137 NAQ |
2361 | if (type != NULL) |
2362 | *type = VM_FAULT_MINOR; | |
2363 | ||
9a2bb7f4 AK |
2364 | return page; |
2365 | } | |
2366 | ||
2367 | static struct vm_operations_struct kvm_vcpu_vm_ops = { | |
2368 | .nopage = kvm_vcpu_nopage, | |
2369 | }; | |
2370 | ||
2371 | static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma) | |
2372 | { | |
2373 | vma->vm_ops = &kvm_vcpu_vm_ops; | |
2374 | return 0; | |
2375 | } | |
2376 | ||
bccf2150 AK |
2377 | static int kvm_vcpu_release(struct inode *inode, struct file *filp) |
2378 | { | |
2379 | struct kvm_vcpu *vcpu = filp->private_data; | |
2380 | ||
2381 | fput(vcpu->kvm->filp); | |
2382 | return 0; | |
2383 | } | |
2384 | ||
2385 | static struct file_operations kvm_vcpu_fops = { | |
2386 | .release = kvm_vcpu_release, | |
2387 | .unlocked_ioctl = kvm_vcpu_ioctl, | |
2388 | .compat_ioctl = kvm_vcpu_ioctl, | |
9a2bb7f4 | 2389 | .mmap = kvm_vcpu_mmap, |
bccf2150 AK |
2390 | }; |
2391 | ||
2392 | /* | |
2393 | * Allocates an inode for the vcpu. | |
2394 | */ | |
2395 | static int create_vcpu_fd(struct kvm_vcpu *vcpu) | |
2396 | { | |
2397 | int fd, r; | |
2398 | struct inode *inode; | |
2399 | struct file *file; | |
2400 | ||
d6d28168 AK |
2401 | r = anon_inode_getfd(&fd, &inode, &file, |
2402 | "kvm-vcpu", &kvm_vcpu_fops, vcpu); | |
2403 | if (r) | |
2404 | return r; | |
bccf2150 | 2405 | atomic_inc(&vcpu->kvm->filp->f_count); |
bccf2150 | 2406 | return fd; |
bccf2150 AK |
2407 | } |
2408 | ||
c5ea7660 AK |
2409 | /* |
2410 | * Creates some virtual cpus. Good luck creating more than one. | |
2411 | */ | |
2412 | static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n) | |
2413 | { | |
2414 | int r; | |
2415 | struct kvm_vcpu *vcpu; | |
2416 | ||
c5ea7660 | 2417 | if (!valid_vcpu(n)) |
fb3f0f51 | 2418 | return -EINVAL; |
c5ea7660 | 2419 | |
fb3f0f51 RR |
2420 | vcpu = kvm_arch_ops->vcpu_create(kvm, n); |
2421 | if (IS_ERR(vcpu)) | |
2422 | return PTR_ERR(vcpu); | |
c5ea7660 | 2423 | |
15ad7146 AK |
2424 | preempt_notifier_init(&vcpu->preempt_notifier, &kvm_preempt_ops); |
2425 | ||
fb3f0f51 | 2426 | vcpu_load(vcpu); |
c5ea7660 | 2427 | r = kvm_mmu_setup(vcpu); |
c5ea7660 | 2428 | vcpu_put(vcpu); |
c5ea7660 | 2429 | if (r < 0) |
fb3f0f51 RR |
2430 | goto free_vcpu; |
2431 | ||
11ec2804 | 2432 | mutex_lock(&kvm->lock); |
fb3f0f51 RR |
2433 | if (kvm->vcpus[n]) { |
2434 | r = -EEXIST; | |
11ec2804 | 2435 | mutex_unlock(&kvm->lock); |
fb3f0f51 RR |
2436 | goto mmu_unload; |
2437 | } | |
2438 | kvm->vcpus[n] = vcpu; | |
11ec2804 | 2439 | mutex_unlock(&kvm->lock); |
c5ea7660 | 2440 | |
fb3f0f51 | 2441 | /* Now it's all set up, let userspace reach it */ |
bccf2150 AK |
2442 | r = create_vcpu_fd(vcpu); |
2443 | if (r < 0) | |
fb3f0f51 RR |
2444 | goto unlink; |
2445 | return r; | |
39c3b86e | 2446 | |
fb3f0f51 | 2447 | unlink: |
11ec2804 | 2448 | mutex_lock(&kvm->lock); |
fb3f0f51 | 2449 | kvm->vcpus[n] = NULL; |
11ec2804 | 2450 | mutex_unlock(&kvm->lock); |
a2fa3e9f | 2451 | |
fb3f0f51 RR |
2452 | mmu_unload: |
2453 | vcpu_load(vcpu); | |
2454 | kvm_mmu_unload(vcpu); | |
2455 | vcpu_put(vcpu); | |
c5ea7660 | 2456 | |
fb3f0f51 RR |
2457 | free_vcpu: |
2458 | kvm_arch_ops->vcpu_free(vcpu); | |
c5ea7660 AK |
2459 | return r; |
2460 | } | |
2461 | ||
2cc51560 ED |
2462 | static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu) |
2463 | { | |
2464 | u64 efer; | |
2465 | int i; | |
2466 | struct kvm_cpuid_entry *e, *entry; | |
2467 | ||
2468 | rdmsrl(MSR_EFER, efer); | |
2469 | entry = NULL; | |
2470 | for (i = 0; i < vcpu->cpuid_nent; ++i) { | |
2471 | e = &vcpu->cpuid_entries[i]; | |
2472 | if (e->function == 0x80000001) { | |
2473 | entry = e; | |
2474 | break; | |
2475 | } | |
2476 | } | |
4c981b43 | 2477 | if (entry && (entry->edx & (1 << 20)) && !(efer & EFER_NX)) { |
2cc51560 | 2478 | entry->edx &= ~(1 << 20); |
4c981b43 | 2479 | printk(KERN_INFO "kvm: guest NX capability removed\n"); |
2cc51560 ED |
2480 | } |
2481 | } | |
2482 | ||
06465c5a AK |
2483 | static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu, |
2484 | struct kvm_cpuid *cpuid, | |
2485 | struct kvm_cpuid_entry __user *entries) | |
2486 | { | |
2487 | int r; | |
2488 | ||
2489 | r = -E2BIG; | |
2490 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
2491 | goto out; | |
2492 | r = -EFAULT; | |
2493 | if (copy_from_user(&vcpu->cpuid_entries, entries, | |
2494 | cpuid->nent * sizeof(struct kvm_cpuid_entry))) | |
2495 | goto out; | |
2496 | vcpu->cpuid_nent = cpuid->nent; | |
2cc51560 | 2497 | cpuid_fix_nx_cap(vcpu); |
06465c5a AK |
2498 | return 0; |
2499 | ||
2500 | out: | |
2501 | return r; | |
2502 | } | |
2503 | ||
1961d276 AK |
2504 | static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset) |
2505 | { | |
2506 | if (sigset) { | |
2507 | sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
2508 | vcpu->sigset_active = 1; | |
2509 | vcpu->sigset = *sigset; | |
2510 | } else | |
2511 | vcpu->sigset_active = 0; | |
2512 | return 0; | |
2513 | } | |
2514 | ||
b8836737 AK |
2515 | /* |
2516 | * fxsave fpu state. Taken from x86_64/processor.h. To be killed when | |
2517 | * we have asm/x86/processor.h | |
2518 | */ | |
2519 | struct fxsave { | |
2520 | u16 cwd; | |
2521 | u16 swd; | |
2522 | u16 twd; | |
2523 | u16 fop; | |
2524 | u64 rip; | |
2525 | u64 rdp; | |
2526 | u32 mxcsr; | |
2527 | u32 mxcsr_mask; | |
2528 | u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */ | |
2529 | #ifdef CONFIG_X86_64 | |
2530 | u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */ | |
2531 | #else | |
2532 | u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */ | |
2533 | #endif | |
2534 | }; | |
2535 | ||
2536 | static int kvm_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
2537 | { | |
2538 | struct fxsave *fxsave = (struct fxsave *)vcpu->guest_fx_image; | |
2539 | ||
2540 | vcpu_load(vcpu); | |
2541 | ||
2542 | memcpy(fpu->fpr, fxsave->st_space, 128); | |
2543 | fpu->fcw = fxsave->cwd; | |
2544 | fpu->fsw = fxsave->swd; | |
2545 | fpu->ftwx = fxsave->twd; | |
2546 | fpu->last_opcode = fxsave->fop; | |
2547 | fpu->last_ip = fxsave->rip; | |
2548 | fpu->last_dp = fxsave->rdp; | |
2549 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space); | |
2550 | ||
2551 | vcpu_put(vcpu); | |
2552 | ||
2553 | return 0; | |
2554 | } | |
2555 | ||
2556 | static int kvm_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
2557 | { | |
2558 | struct fxsave *fxsave = (struct fxsave *)vcpu->guest_fx_image; | |
2559 | ||
2560 | vcpu_load(vcpu); | |
2561 | ||
2562 | memcpy(fxsave->st_space, fpu->fpr, 128); | |
2563 | fxsave->cwd = fpu->fcw; | |
2564 | fxsave->swd = fpu->fsw; | |
2565 | fxsave->twd = fpu->ftwx; | |
2566 | fxsave->fop = fpu->last_opcode; | |
2567 | fxsave->rip = fpu->last_ip; | |
2568 | fxsave->rdp = fpu->last_dp; | |
2569 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space); | |
2570 | ||
2571 | vcpu_put(vcpu); | |
2572 | ||
2573 | return 0; | |
2574 | } | |
2575 | ||
bccf2150 AK |
2576 | static long kvm_vcpu_ioctl(struct file *filp, |
2577 | unsigned int ioctl, unsigned long arg) | |
6aa8b732 | 2578 | { |
bccf2150 | 2579 | struct kvm_vcpu *vcpu = filp->private_data; |
2f366987 | 2580 | void __user *argp = (void __user *)arg; |
6aa8b732 AK |
2581 | int r = -EINVAL; |
2582 | ||
2583 | switch (ioctl) { | |
9a2bb7f4 | 2584 | case KVM_RUN: |
f0fe5108 AK |
2585 | r = -EINVAL; |
2586 | if (arg) | |
2587 | goto out; | |
9a2bb7f4 | 2588 | r = kvm_vcpu_ioctl_run(vcpu, vcpu->run); |
6aa8b732 | 2589 | break; |
6aa8b732 AK |
2590 | case KVM_GET_REGS: { |
2591 | struct kvm_regs kvm_regs; | |
2592 | ||
bccf2150 AK |
2593 | memset(&kvm_regs, 0, sizeof kvm_regs); |
2594 | r = kvm_vcpu_ioctl_get_regs(vcpu, &kvm_regs); | |
6aa8b732 AK |
2595 | if (r) |
2596 | goto out; | |
2597 | r = -EFAULT; | |
2f366987 | 2598 | if (copy_to_user(argp, &kvm_regs, sizeof kvm_regs)) |
6aa8b732 AK |
2599 | goto out; |
2600 | r = 0; | |
2601 | break; | |
2602 | } | |
2603 | case KVM_SET_REGS: { | |
2604 | struct kvm_regs kvm_regs; | |
2605 | ||
2606 | r = -EFAULT; | |
2f366987 | 2607 | if (copy_from_user(&kvm_regs, argp, sizeof kvm_regs)) |
6aa8b732 | 2608 | goto out; |
bccf2150 | 2609 | r = kvm_vcpu_ioctl_set_regs(vcpu, &kvm_regs); |
6aa8b732 AK |
2610 | if (r) |
2611 | goto out; | |
2612 | r = 0; | |
2613 | break; | |
2614 | } | |
2615 | case KVM_GET_SREGS: { | |
2616 | struct kvm_sregs kvm_sregs; | |
2617 | ||
bccf2150 AK |
2618 | memset(&kvm_sregs, 0, sizeof kvm_sregs); |
2619 | r = kvm_vcpu_ioctl_get_sregs(vcpu, &kvm_sregs); | |
6aa8b732 AK |
2620 | if (r) |
2621 | goto out; | |
2622 | r = -EFAULT; | |
2f366987 | 2623 | if (copy_to_user(argp, &kvm_sregs, sizeof kvm_sregs)) |
6aa8b732 AK |
2624 | goto out; |
2625 | r = 0; | |
2626 | break; | |
2627 | } | |
2628 | case KVM_SET_SREGS: { | |
2629 | struct kvm_sregs kvm_sregs; | |
2630 | ||
2631 | r = -EFAULT; | |
2f366987 | 2632 | if (copy_from_user(&kvm_sregs, argp, sizeof kvm_sregs)) |
6aa8b732 | 2633 | goto out; |
bccf2150 | 2634 | r = kvm_vcpu_ioctl_set_sregs(vcpu, &kvm_sregs); |
6aa8b732 AK |
2635 | if (r) |
2636 | goto out; | |
2637 | r = 0; | |
2638 | break; | |
2639 | } | |
2640 | case KVM_TRANSLATE: { | |
2641 | struct kvm_translation tr; | |
2642 | ||
2643 | r = -EFAULT; | |
2f366987 | 2644 | if (copy_from_user(&tr, argp, sizeof tr)) |
6aa8b732 | 2645 | goto out; |
bccf2150 | 2646 | r = kvm_vcpu_ioctl_translate(vcpu, &tr); |
6aa8b732 AK |
2647 | if (r) |
2648 | goto out; | |
2649 | r = -EFAULT; | |
2f366987 | 2650 | if (copy_to_user(argp, &tr, sizeof tr)) |
6aa8b732 AK |
2651 | goto out; |
2652 | r = 0; | |
2653 | break; | |
2654 | } | |
2655 | case KVM_INTERRUPT: { | |
2656 | struct kvm_interrupt irq; | |
2657 | ||
2658 | r = -EFAULT; | |
2f366987 | 2659 | if (copy_from_user(&irq, argp, sizeof irq)) |
6aa8b732 | 2660 | goto out; |
bccf2150 | 2661 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); |
6aa8b732 AK |
2662 | if (r) |
2663 | goto out; | |
2664 | r = 0; | |
2665 | break; | |
2666 | } | |
2667 | case KVM_DEBUG_GUEST: { | |
2668 | struct kvm_debug_guest dbg; | |
2669 | ||
2670 | r = -EFAULT; | |
2f366987 | 2671 | if (copy_from_user(&dbg, argp, sizeof dbg)) |
6aa8b732 | 2672 | goto out; |
bccf2150 | 2673 | r = kvm_vcpu_ioctl_debug_guest(vcpu, &dbg); |
6aa8b732 AK |
2674 | if (r) |
2675 | goto out; | |
2676 | r = 0; | |
2677 | break; | |
2678 | } | |
bccf2150 | 2679 | case KVM_GET_MSRS: |
35f3f286 | 2680 | r = msr_io(vcpu, argp, kvm_get_msr, 1); |
bccf2150 AK |
2681 | break; |
2682 | case KVM_SET_MSRS: | |
2683 | r = msr_io(vcpu, argp, do_set_msr, 0); | |
2684 | break; | |
06465c5a AK |
2685 | case KVM_SET_CPUID: { |
2686 | struct kvm_cpuid __user *cpuid_arg = argp; | |
2687 | struct kvm_cpuid cpuid; | |
2688 | ||
2689 | r = -EFAULT; | |
2690 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2691 | goto out; | |
2692 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); | |
2693 | if (r) | |
2694 | goto out; | |
2695 | break; | |
2696 | } | |
1961d276 AK |
2697 | case KVM_SET_SIGNAL_MASK: { |
2698 | struct kvm_signal_mask __user *sigmask_arg = argp; | |
2699 | struct kvm_signal_mask kvm_sigmask; | |
2700 | sigset_t sigset, *p; | |
2701 | ||
2702 | p = NULL; | |
2703 | if (argp) { | |
2704 | r = -EFAULT; | |
2705 | if (copy_from_user(&kvm_sigmask, argp, | |
2706 | sizeof kvm_sigmask)) | |
2707 | goto out; | |
2708 | r = -EINVAL; | |
2709 | if (kvm_sigmask.len != sizeof sigset) | |
2710 | goto out; | |
2711 | r = -EFAULT; | |
2712 | if (copy_from_user(&sigset, sigmask_arg->sigset, | |
2713 | sizeof sigset)) | |
2714 | goto out; | |
2715 | p = &sigset; | |
2716 | } | |
2717 | r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset); | |
2718 | break; | |
2719 | } | |
b8836737 AK |
2720 | case KVM_GET_FPU: { |
2721 | struct kvm_fpu fpu; | |
2722 | ||
2723 | memset(&fpu, 0, sizeof fpu); | |
2724 | r = kvm_vcpu_ioctl_get_fpu(vcpu, &fpu); | |
2725 | if (r) | |
2726 | goto out; | |
2727 | r = -EFAULT; | |
2728 | if (copy_to_user(argp, &fpu, sizeof fpu)) | |
2729 | goto out; | |
2730 | r = 0; | |
2731 | break; | |
2732 | } | |
2733 | case KVM_SET_FPU: { | |
2734 | struct kvm_fpu fpu; | |
2735 | ||
2736 | r = -EFAULT; | |
2737 | if (copy_from_user(&fpu, argp, sizeof fpu)) | |
2738 | goto out; | |
2739 | r = kvm_vcpu_ioctl_set_fpu(vcpu, &fpu); | |
2740 | if (r) | |
2741 | goto out; | |
2742 | r = 0; | |
2743 | break; | |
2744 | } | |
bccf2150 AK |
2745 | default: |
2746 | ; | |
2747 | } | |
2748 | out: | |
2749 | return r; | |
2750 | } | |
2751 | ||
2752 | static long kvm_vm_ioctl(struct file *filp, | |
2753 | unsigned int ioctl, unsigned long arg) | |
2754 | { | |
2755 | struct kvm *kvm = filp->private_data; | |
2756 | void __user *argp = (void __user *)arg; | |
2757 | int r = -EINVAL; | |
2758 | ||
2759 | switch (ioctl) { | |
2760 | case KVM_CREATE_VCPU: | |
2761 | r = kvm_vm_ioctl_create_vcpu(kvm, arg); | |
2762 | if (r < 0) | |
2763 | goto out; | |
2764 | break; | |
6aa8b732 AK |
2765 | case KVM_SET_MEMORY_REGION: { |
2766 | struct kvm_memory_region kvm_mem; | |
2767 | ||
2768 | r = -EFAULT; | |
2f366987 | 2769 | if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem)) |
6aa8b732 | 2770 | goto out; |
2c6f5df9 | 2771 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_mem); |
6aa8b732 AK |
2772 | if (r) |
2773 | goto out; | |
2774 | break; | |
2775 | } | |
2776 | case KVM_GET_DIRTY_LOG: { | |
2777 | struct kvm_dirty_log log; | |
2778 | ||
2779 | r = -EFAULT; | |
2f366987 | 2780 | if (copy_from_user(&log, argp, sizeof log)) |
6aa8b732 | 2781 | goto out; |
2c6f5df9 | 2782 | r = kvm_vm_ioctl_get_dirty_log(kvm, &log); |
6aa8b732 AK |
2783 | if (r) |
2784 | goto out; | |
2785 | break; | |
2786 | } | |
e8207547 AK |
2787 | case KVM_SET_MEMORY_ALIAS: { |
2788 | struct kvm_memory_alias alias; | |
2789 | ||
2790 | r = -EFAULT; | |
2791 | if (copy_from_user(&alias, argp, sizeof alias)) | |
2792 | goto out; | |
2793 | r = kvm_vm_ioctl_set_memory_alias(kvm, &alias); | |
2794 | if (r) | |
2795 | goto out; | |
2796 | break; | |
2797 | } | |
f17abe9a AK |
2798 | default: |
2799 | ; | |
2800 | } | |
2801 | out: | |
2802 | return r; | |
2803 | } | |
2804 | ||
2805 | static struct page *kvm_vm_nopage(struct vm_area_struct *vma, | |
2806 | unsigned long address, | |
2807 | int *type) | |
2808 | { | |
2809 | struct kvm *kvm = vma->vm_file->private_data; | |
2810 | unsigned long pgoff; | |
f17abe9a AK |
2811 | struct page *page; |
2812 | ||
f17abe9a | 2813 | pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff; |
954bbbc2 | 2814 | page = gfn_to_page(kvm, pgoff); |
f17abe9a AK |
2815 | if (!page) |
2816 | return NOPAGE_SIGBUS; | |
2817 | get_page(page); | |
cd0d9137 NAQ |
2818 | if (type != NULL) |
2819 | *type = VM_FAULT_MINOR; | |
2820 | ||
f17abe9a AK |
2821 | return page; |
2822 | } | |
2823 | ||
2824 | static struct vm_operations_struct kvm_vm_vm_ops = { | |
2825 | .nopage = kvm_vm_nopage, | |
2826 | }; | |
2827 | ||
2828 | static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma) | |
2829 | { | |
2830 | vma->vm_ops = &kvm_vm_vm_ops; | |
2831 | return 0; | |
2832 | } | |
2833 | ||
2834 | static struct file_operations kvm_vm_fops = { | |
2835 | .release = kvm_vm_release, | |
2836 | .unlocked_ioctl = kvm_vm_ioctl, | |
2837 | .compat_ioctl = kvm_vm_ioctl, | |
2838 | .mmap = kvm_vm_mmap, | |
2839 | }; | |
2840 | ||
2841 | static int kvm_dev_ioctl_create_vm(void) | |
2842 | { | |
2843 | int fd, r; | |
2844 | struct inode *inode; | |
2845 | struct file *file; | |
2846 | struct kvm *kvm; | |
2847 | ||
f17abe9a | 2848 | kvm = kvm_create_vm(); |
d6d28168 AK |
2849 | if (IS_ERR(kvm)) |
2850 | return PTR_ERR(kvm); | |
2851 | r = anon_inode_getfd(&fd, &inode, &file, "kvm-vm", &kvm_vm_fops, kvm); | |
2852 | if (r) { | |
2853 | kvm_destroy_vm(kvm); | |
2854 | return r; | |
f17abe9a AK |
2855 | } |
2856 | ||
bccf2150 | 2857 | kvm->filp = file; |
f17abe9a | 2858 | |
f17abe9a | 2859 | return fd; |
f17abe9a AK |
2860 | } |
2861 | ||
2862 | static long kvm_dev_ioctl(struct file *filp, | |
2863 | unsigned int ioctl, unsigned long arg) | |
2864 | { | |
2865 | void __user *argp = (void __user *)arg; | |
07c45a36 | 2866 | long r = -EINVAL; |
f17abe9a AK |
2867 | |
2868 | switch (ioctl) { | |
2869 | case KVM_GET_API_VERSION: | |
f0fe5108 AK |
2870 | r = -EINVAL; |
2871 | if (arg) | |
2872 | goto out; | |
f17abe9a AK |
2873 | r = KVM_API_VERSION; |
2874 | break; | |
2875 | case KVM_CREATE_VM: | |
f0fe5108 AK |
2876 | r = -EINVAL; |
2877 | if (arg) | |
2878 | goto out; | |
f17abe9a AK |
2879 | r = kvm_dev_ioctl_create_vm(); |
2880 | break; | |
6aa8b732 | 2881 | case KVM_GET_MSR_INDEX_LIST: { |
2f366987 | 2882 | struct kvm_msr_list __user *user_msr_list = argp; |
6aa8b732 AK |
2883 | struct kvm_msr_list msr_list; |
2884 | unsigned n; | |
2885 | ||
2886 | r = -EFAULT; | |
2887 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) | |
2888 | goto out; | |
2889 | n = msr_list.nmsrs; | |
6f00e68f | 2890 | msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs); |
6aa8b732 AK |
2891 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) |
2892 | goto out; | |
2893 | r = -E2BIG; | |
bf591b24 | 2894 | if (n < num_msrs_to_save) |
6aa8b732 AK |
2895 | goto out; |
2896 | r = -EFAULT; | |
2897 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, | |
bf591b24 | 2898 | num_msrs_to_save * sizeof(u32))) |
6aa8b732 | 2899 | goto out; |
6f00e68f AK |
2900 | if (copy_to_user(user_msr_list->indices |
2901 | + num_msrs_to_save * sizeof(u32), | |
2902 | &emulated_msrs, | |
2903 | ARRAY_SIZE(emulated_msrs) * sizeof(u32))) | |
2904 | goto out; | |
6aa8b732 | 2905 | r = 0; |
cc1d8955 | 2906 | break; |
6aa8b732 | 2907 | } |
5d308f45 AK |
2908 | case KVM_CHECK_EXTENSION: |
2909 | /* | |
2910 | * No extensions defined at present. | |
2911 | */ | |
2912 | r = 0; | |
2913 | break; | |
07c45a36 AK |
2914 | case KVM_GET_VCPU_MMAP_SIZE: |
2915 | r = -EINVAL; | |
2916 | if (arg) | |
2917 | goto out; | |
039576c0 | 2918 | r = 2 * PAGE_SIZE; |
07c45a36 | 2919 | break; |
6aa8b732 AK |
2920 | default: |
2921 | ; | |
2922 | } | |
2923 | out: | |
2924 | return r; | |
2925 | } | |
2926 | ||
6aa8b732 AK |
2927 | static struct file_operations kvm_chardev_ops = { |
2928 | .open = kvm_dev_open, | |
2929 | .release = kvm_dev_release, | |
2930 | .unlocked_ioctl = kvm_dev_ioctl, | |
2931 | .compat_ioctl = kvm_dev_ioctl, | |
6aa8b732 AK |
2932 | }; |
2933 | ||
2934 | static struct miscdevice kvm_dev = { | |
bbe4432e | 2935 | KVM_MINOR, |
6aa8b732 AK |
2936 | "kvm", |
2937 | &kvm_chardev_ops, | |
2938 | }; | |
2939 | ||
774c47f1 AK |
2940 | /* |
2941 | * Make sure that a cpu that is being hot-unplugged does not have any vcpus | |
2942 | * cached on it. | |
2943 | */ | |
2944 | static void decache_vcpus_on_cpu(int cpu) | |
2945 | { | |
2946 | struct kvm *vm; | |
2947 | struct kvm_vcpu *vcpu; | |
2948 | int i; | |
2949 | ||
2950 | spin_lock(&kvm_lock); | |
11ec2804 | 2951 | list_for_each_entry(vm, &vm_list, vm_list) |
774c47f1 | 2952 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
fb3f0f51 RR |
2953 | vcpu = vm->vcpus[i]; |
2954 | if (!vcpu) | |
2955 | continue; | |
774c47f1 AK |
2956 | /* |
2957 | * If the vcpu is locked, then it is running on some | |
2958 | * other cpu and therefore it is not cached on the | |
2959 | * cpu in question. | |
2960 | * | |
2961 | * If it's not locked, check the last cpu it executed | |
2962 | * on. | |
2963 | */ | |
2964 | if (mutex_trylock(&vcpu->mutex)) { | |
2965 | if (vcpu->cpu == cpu) { | |
2966 | kvm_arch_ops->vcpu_decache(vcpu); | |
2967 | vcpu->cpu = -1; | |
2968 | } | |
2969 | mutex_unlock(&vcpu->mutex); | |
2970 | } | |
2971 | } | |
2972 | spin_unlock(&kvm_lock); | |
2973 | } | |
2974 | ||
1b6c0168 AK |
2975 | static void hardware_enable(void *junk) |
2976 | { | |
2977 | int cpu = raw_smp_processor_id(); | |
2978 | ||
2979 | if (cpu_isset(cpu, cpus_hardware_enabled)) | |
2980 | return; | |
2981 | cpu_set(cpu, cpus_hardware_enabled); | |
2982 | kvm_arch_ops->hardware_enable(NULL); | |
2983 | } | |
2984 | ||
2985 | static void hardware_disable(void *junk) | |
2986 | { | |
2987 | int cpu = raw_smp_processor_id(); | |
2988 | ||
2989 | if (!cpu_isset(cpu, cpus_hardware_enabled)) | |
2990 | return; | |
2991 | cpu_clear(cpu, cpus_hardware_enabled); | |
2992 | decache_vcpus_on_cpu(cpu); | |
2993 | kvm_arch_ops->hardware_disable(NULL); | |
2994 | } | |
2995 | ||
774c47f1 AK |
2996 | static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val, |
2997 | void *v) | |
2998 | { | |
2999 | int cpu = (long)v; | |
3000 | ||
3001 | switch (val) { | |
cec9ad27 AK |
3002 | case CPU_DYING: |
3003 | case CPU_DYING_FROZEN: | |
6ec8a856 AK |
3004 | printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n", |
3005 | cpu); | |
3006 | hardware_disable(NULL); | |
3007 | break; | |
774c47f1 | 3008 | case CPU_UP_CANCELED: |
8bb78442 | 3009 | case CPU_UP_CANCELED_FROZEN: |
43934a38 JK |
3010 | printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n", |
3011 | cpu); | |
1b6c0168 | 3012 | smp_call_function_single(cpu, hardware_disable, NULL, 0, 1); |
774c47f1 | 3013 | break; |
43934a38 | 3014 | case CPU_ONLINE: |
8bb78442 | 3015 | case CPU_ONLINE_FROZEN: |
43934a38 JK |
3016 | printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n", |
3017 | cpu); | |
1b6c0168 | 3018 | smp_call_function_single(cpu, hardware_enable, NULL, 0, 1); |
774c47f1 AK |
3019 | break; |
3020 | } | |
3021 | return NOTIFY_OK; | |
3022 | } | |
3023 | ||
9a2b85c6 RR |
3024 | static int kvm_reboot(struct notifier_block *notifier, unsigned long val, |
3025 | void *v) | |
3026 | { | |
3027 | if (val == SYS_RESTART) { | |
3028 | /* | |
3029 | * Some (well, at least mine) BIOSes hang on reboot if | |
3030 | * in vmx root mode. | |
3031 | */ | |
3032 | printk(KERN_INFO "kvm: exiting hardware virtualization\n"); | |
3033 | on_each_cpu(hardware_disable, NULL, 0, 1); | |
3034 | } | |
3035 | return NOTIFY_OK; | |
3036 | } | |
3037 | ||
3038 | static struct notifier_block kvm_reboot_notifier = { | |
3039 | .notifier_call = kvm_reboot, | |
3040 | .priority = 0, | |
3041 | }; | |
3042 | ||
2eeb2e94 GH |
3043 | void kvm_io_bus_init(struct kvm_io_bus *bus) |
3044 | { | |
3045 | memset(bus, 0, sizeof(*bus)); | |
3046 | } | |
3047 | ||
3048 | void kvm_io_bus_destroy(struct kvm_io_bus *bus) | |
3049 | { | |
3050 | int i; | |
3051 | ||
3052 | for (i = 0; i < bus->dev_count; i++) { | |
3053 | struct kvm_io_device *pos = bus->devs[i]; | |
3054 | ||
3055 | kvm_iodevice_destructor(pos); | |
3056 | } | |
3057 | } | |
3058 | ||
3059 | struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr) | |
3060 | { | |
3061 | int i; | |
3062 | ||
3063 | for (i = 0; i < bus->dev_count; i++) { | |
3064 | struct kvm_io_device *pos = bus->devs[i]; | |
3065 | ||
3066 | if (pos->in_range(pos, addr)) | |
3067 | return pos; | |
3068 | } | |
3069 | ||
3070 | return NULL; | |
3071 | } | |
3072 | ||
3073 | void kvm_io_bus_register_dev(struct kvm_io_bus *bus, struct kvm_io_device *dev) | |
3074 | { | |
3075 | BUG_ON(bus->dev_count > (NR_IOBUS_DEVS-1)); | |
3076 | ||
3077 | bus->devs[bus->dev_count++] = dev; | |
3078 | } | |
3079 | ||
774c47f1 AK |
3080 | static struct notifier_block kvm_cpu_notifier = { |
3081 | .notifier_call = kvm_cpu_hotplug, | |
3082 | .priority = 20, /* must be > scheduler priority */ | |
3083 | }; | |
3084 | ||
1165f5fe AK |
3085 | static u64 stat_get(void *_offset) |
3086 | { | |
3087 | unsigned offset = (long)_offset; | |
3088 | u64 total = 0; | |
3089 | struct kvm *kvm; | |
3090 | struct kvm_vcpu *vcpu; | |
3091 | int i; | |
3092 | ||
3093 | spin_lock(&kvm_lock); | |
3094 | list_for_each_entry(kvm, &vm_list, vm_list) | |
3095 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
fb3f0f51 RR |
3096 | vcpu = kvm->vcpus[i]; |
3097 | if (vcpu) | |
3098 | total += *(u32 *)((void *)vcpu + offset); | |
1165f5fe AK |
3099 | } |
3100 | spin_unlock(&kvm_lock); | |
3101 | return total; | |
3102 | } | |
3103 | ||
3104 | static void stat_set(void *offset, u64 val) | |
3105 | { | |
3106 | } | |
3107 | ||
3108 | DEFINE_SIMPLE_ATTRIBUTE(stat_fops, stat_get, stat_set, "%llu\n"); | |
3109 | ||
6aa8b732 AK |
3110 | static __init void kvm_init_debug(void) |
3111 | { | |
3112 | struct kvm_stats_debugfs_item *p; | |
3113 | ||
8b6d44c7 | 3114 | debugfs_dir = debugfs_create_dir("kvm", NULL); |
6aa8b732 | 3115 | for (p = debugfs_entries; p->name; ++p) |
1165f5fe AK |
3116 | p->dentry = debugfs_create_file(p->name, 0444, debugfs_dir, |
3117 | (void *)(long)p->offset, | |
3118 | &stat_fops); | |
6aa8b732 AK |
3119 | } |
3120 | ||
3121 | static void kvm_exit_debug(void) | |
3122 | { | |
3123 | struct kvm_stats_debugfs_item *p; | |
3124 | ||
3125 | for (p = debugfs_entries; p->name; ++p) | |
3126 | debugfs_remove(p->dentry); | |
3127 | debugfs_remove(debugfs_dir); | |
3128 | } | |
3129 | ||
59ae6c6b AK |
3130 | static int kvm_suspend(struct sys_device *dev, pm_message_t state) |
3131 | { | |
4267c41a | 3132 | hardware_disable(NULL); |
59ae6c6b AK |
3133 | return 0; |
3134 | } | |
3135 | ||
3136 | static int kvm_resume(struct sys_device *dev) | |
3137 | { | |
4267c41a | 3138 | hardware_enable(NULL); |
59ae6c6b AK |
3139 | return 0; |
3140 | } | |
3141 | ||
3142 | static struct sysdev_class kvm_sysdev_class = { | |
3143 | set_kset_name("kvm"), | |
3144 | .suspend = kvm_suspend, | |
3145 | .resume = kvm_resume, | |
3146 | }; | |
3147 | ||
3148 | static struct sys_device kvm_sysdev = { | |
3149 | .id = 0, | |
3150 | .cls = &kvm_sysdev_class, | |
3151 | }; | |
3152 | ||
6aa8b732 AK |
3153 | hpa_t bad_page_address; |
3154 | ||
15ad7146 AK |
3155 | static inline |
3156 | struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn) | |
3157 | { | |
3158 | return container_of(pn, struct kvm_vcpu, preempt_notifier); | |
3159 | } | |
3160 | ||
3161 | static void kvm_sched_in(struct preempt_notifier *pn, int cpu) | |
3162 | { | |
3163 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); | |
3164 | ||
3165 | kvm_arch_ops->vcpu_load(vcpu, cpu); | |
3166 | } | |
3167 | ||
3168 | static void kvm_sched_out(struct preempt_notifier *pn, | |
3169 | struct task_struct *next) | |
3170 | { | |
3171 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); | |
3172 | ||
3173 | kvm_arch_ops->vcpu_put(vcpu); | |
3174 | } | |
3175 | ||
6aa8b732 AK |
3176 | int kvm_init_arch(struct kvm_arch_ops *ops, struct module *module) |
3177 | { | |
3178 | int r; | |
3179 | ||
09db28b8 YI |
3180 | if (kvm_arch_ops) { |
3181 | printk(KERN_ERR "kvm: already loaded the other module\n"); | |
3182 | return -EEXIST; | |
3183 | } | |
3184 | ||
e097f35c | 3185 | if (!ops->cpu_has_kvm_support()) { |
6aa8b732 AK |
3186 | printk(KERN_ERR "kvm: no hardware support\n"); |
3187 | return -EOPNOTSUPP; | |
3188 | } | |
e097f35c | 3189 | if (ops->disabled_by_bios()) { |
6aa8b732 AK |
3190 | printk(KERN_ERR "kvm: disabled by bios\n"); |
3191 | return -EOPNOTSUPP; | |
3192 | } | |
3193 | ||
e097f35c YI |
3194 | kvm_arch_ops = ops; |
3195 | ||
6aa8b732 AK |
3196 | r = kvm_arch_ops->hardware_setup(); |
3197 | if (r < 0) | |
ca45aaae | 3198 | goto out; |
6aa8b732 | 3199 | |
1b6c0168 | 3200 | on_each_cpu(hardware_enable, NULL, 0, 1); |
774c47f1 AK |
3201 | r = register_cpu_notifier(&kvm_cpu_notifier); |
3202 | if (r) | |
3203 | goto out_free_1; | |
6aa8b732 AK |
3204 | register_reboot_notifier(&kvm_reboot_notifier); |
3205 | ||
59ae6c6b AK |
3206 | r = sysdev_class_register(&kvm_sysdev_class); |
3207 | if (r) | |
3208 | goto out_free_2; | |
3209 | ||
3210 | r = sysdev_register(&kvm_sysdev); | |
3211 | if (r) | |
3212 | goto out_free_3; | |
3213 | ||
6aa8b732 AK |
3214 | kvm_chardev_ops.owner = module; |
3215 | ||
3216 | r = misc_register(&kvm_dev); | |
3217 | if (r) { | |
3218 | printk (KERN_ERR "kvm: misc device register failed\n"); | |
3219 | goto out_free; | |
3220 | } | |
3221 | ||
15ad7146 AK |
3222 | kvm_preempt_ops.sched_in = kvm_sched_in; |
3223 | kvm_preempt_ops.sched_out = kvm_sched_out; | |
3224 | ||
6aa8b732 AK |
3225 | return r; |
3226 | ||
3227 | out_free: | |
59ae6c6b AK |
3228 | sysdev_unregister(&kvm_sysdev); |
3229 | out_free_3: | |
3230 | sysdev_class_unregister(&kvm_sysdev_class); | |
3231 | out_free_2: | |
6aa8b732 | 3232 | unregister_reboot_notifier(&kvm_reboot_notifier); |
774c47f1 AK |
3233 | unregister_cpu_notifier(&kvm_cpu_notifier); |
3234 | out_free_1: | |
1b6c0168 | 3235 | on_each_cpu(hardware_disable, NULL, 0, 1); |
6aa8b732 | 3236 | kvm_arch_ops->hardware_unsetup(); |
ca45aaae AK |
3237 | out: |
3238 | kvm_arch_ops = NULL; | |
6aa8b732 AK |
3239 | return r; |
3240 | } | |
3241 | ||
3242 | void kvm_exit_arch(void) | |
3243 | { | |
3244 | misc_deregister(&kvm_dev); | |
59ae6c6b AK |
3245 | sysdev_unregister(&kvm_sysdev); |
3246 | sysdev_class_unregister(&kvm_sysdev_class); | |
6aa8b732 | 3247 | unregister_reboot_notifier(&kvm_reboot_notifier); |
59ae6c6b | 3248 | unregister_cpu_notifier(&kvm_cpu_notifier); |
1b6c0168 | 3249 | on_each_cpu(hardware_disable, NULL, 0, 1); |
6aa8b732 | 3250 | kvm_arch_ops->hardware_unsetup(); |
09db28b8 | 3251 | kvm_arch_ops = NULL; |
6aa8b732 AK |
3252 | } |
3253 | ||
3254 | static __init int kvm_init(void) | |
3255 | { | |
3256 | static struct page *bad_page; | |
37e29d90 AK |
3257 | int r; |
3258 | ||
b5a33a75 AK |
3259 | r = kvm_mmu_module_init(); |
3260 | if (r) | |
3261 | goto out4; | |
3262 | ||
6aa8b732 AK |
3263 | kvm_init_debug(); |
3264 | ||
bf591b24 MR |
3265 | kvm_init_msr_list(); |
3266 | ||
6aa8b732 AK |
3267 | if ((bad_page = alloc_page(GFP_KERNEL)) == NULL) { |
3268 | r = -ENOMEM; | |
3269 | goto out; | |
3270 | } | |
3271 | ||
3272 | bad_page_address = page_to_pfn(bad_page) << PAGE_SHIFT; | |
3273 | memset(__va(bad_page_address), 0, PAGE_SIZE); | |
3274 | ||
58e690e6 | 3275 | return 0; |
6aa8b732 AK |
3276 | |
3277 | out: | |
3278 | kvm_exit_debug(); | |
b5a33a75 AK |
3279 | kvm_mmu_module_exit(); |
3280 | out4: | |
6aa8b732 AK |
3281 | return r; |
3282 | } | |
3283 | ||
3284 | static __exit void kvm_exit(void) | |
3285 | { | |
3286 | kvm_exit_debug(); | |
3287 | __free_page(pfn_to_page(bad_page_address >> PAGE_SHIFT)); | |
b5a33a75 | 3288 | kvm_mmu_module_exit(); |
6aa8b732 AK |
3289 | } |
3290 | ||
3291 | module_init(kvm_init) | |
3292 | module_exit(kvm_exit) | |
3293 | ||
3294 | EXPORT_SYMBOL_GPL(kvm_init_arch); | |
3295 | EXPORT_SYMBOL_GPL(kvm_exit_arch); |