Commit | Line | Data |
---|---|---|
6aa8b732 AK |
1 | /* |
2 | * Kernel-based Virtual Machine driver for Linux | |
3 | * | |
4 | * This module enables machines with Intel VT-x extensions to run virtual | |
5 | * machines without emulation or binary translation. | |
6 | * | |
7 | * Copyright (C) 2006 Qumranet, Inc. | |
8 | * | |
9 | * Authors: | |
10 | * Avi Kivity <avi@qumranet.com> | |
11 | * Yaniv Kamay <yaniv@qumranet.com> | |
12 | * | |
13 | * This work is licensed under the terms of the GNU GPL, version 2. See | |
14 | * the COPYING file in the top-level directory. | |
15 | * | |
16 | */ | |
17 | ||
18 | #include "kvm.h" | |
e495606d AK |
19 | #include "x86_emulate.h" |
20 | #include "segment_descriptor.h" | |
85f455f7 | 21 | #include "irq.h" |
6aa8b732 AK |
22 | |
23 | #include <linux/kvm.h> | |
24 | #include <linux/module.h> | |
25 | #include <linux/errno.h> | |
6aa8b732 AK |
26 | #include <linux/percpu.h> |
27 | #include <linux/gfp.h> | |
6aa8b732 AK |
28 | #include <linux/mm.h> |
29 | #include <linux/miscdevice.h> | |
30 | #include <linux/vmalloc.h> | |
6aa8b732 | 31 | #include <linux/reboot.h> |
6aa8b732 AK |
32 | #include <linux/debugfs.h> |
33 | #include <linux/highmem.h> | |
34 | #include <linux/file.h> | |
59ae6c6b | 35 | #include <linux/sysdev.h> |
774c47f1 | 36 | #include <linux/cpu.h> |
e8edc6e0 | 37 | #include <linux/sched.h> |
d9e368d6 AK |
38 | #include <linux/cpumask.h> |
39 | #include <linux/smp.h> | |
d6d28168 | 40 | #include <linux/anon_inodes.h> |
6aa8b732 | 41 | |
e495606d AK |
42 | #include <asm/processor.h> |
43 | #include <asm/msr.h> | |
44 | #include <asm/io.h> | |
45 | #include <asm/uaccess.h> | |
46 | #include <asm/desc.h> | |
6aa8b732 AK |
47 | |
48 | MODULE_AUTHOR("Qumranet"); | |
49 | MODULE_LICENSE("GPL"); | |
50 | ||
133de902 AK |
51 | static DEFINE_SPINLOCK(kvm_lock); |
52 | static LIST_HEAD(vm_list); | |
53 | ||
1b6c0168 AK |
54 | static cpumask_t cpus_hardware_enabled; |
55 | ||
6aa8b732 | 56 | struct kvm_arch_ops *kvm_arch_ops; |
c16f862d RR |
57 | struct kmem_cache *kvm_vcpu_cache; |
58 | EXPORT_SYMBOL_GPL(kvm_vcpu_cache); | |
1165f5fe | 59 | |
15ad7146 AK |
60 | static __read_mostly struct preempt_ops kvm_preempt_ops; |
61 | ||
1165f5fe | 62 | #define STAT_OFFSET(x) offsetof(struct kvm_vcpu, stat.x) |
6aa8b732 AK |
63 | |
64 | static struct kvm_stats_debugfs_item { | |
65 | const char *name; | |
1165f5fe | 66 | int offset; |
6aa8b732 AK |
67 | struct dentry *dentry; |
68 | } debugfs_entries[] = { | |
1165f5fe AK |
69 | { "pf_fixed", STAT_OFFSET(pf_fixed) }, |
70 | { "pf_guest", STAT_OFFSET(pf_guest) }, | |
71 | { "tlb_flush", STAT_OFFSET(tlb_flush) }, | |
72 | { "invlpg", STAT_OFFSET(invlpg) }, | |
73 | { "exits", STAT_OFFSET(exits) }, | |
74 | { "io_exits", STAT_OFFSET(io_exits) }, | |
75 | { "mmio_exits", STAT_OFFSET(mmio_exits) }, | |
76 | { "signal_exits", STAT_OFFSET(signal_exits) }, | |
77 | { "irq_window", STAT_OFFSET(irq_window_exits) }, | |
78 | { "halt_exits", STAT_OFFSET(halt_exits) }, | |
b6958ce4 | 79 | { "halt_wakeup", STAT_OFFSET(halt_wakeup) }, |
1165f5fe AK |
80 | { "request_irq", STAT_OFFSET(request_irq_exits) }, |
81 | { "irq_exits", STAT_OFFSET(irq_exits) }, | |
e6adf283 | 82 | { "light_exits", STAT_OFFSET(light_exits) }, |
2cc51560 | 83 | { "efer_reload", STAT_OFFSET(efer_reload) }, |
1165f5fe | 84 | { NULL } |
6aa8b732 AK |
85 | }; |
86 | ||
87 | static struct dentry *debugfs_dir; | |
88 | ||
89 | #define MAX_IO_MSRS 256 | |
90 | ||
707d92fa RR |
91 | #define CR0_RESERVED_BITS \ |
92 | (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \ | |
93 | | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \ | |
94 | | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG)) | |
66aee91a RR |
95 | #define CR4_RESERVED_BITS \ |
96 | (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\ | |
97 | | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \ | |
98 | | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \ | |
99 | | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE)) | |
100 | ||
7075bc81 | 101 | #define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR) |
6aa8b732 AK |
102 | #define EFER_RESERVED_BITS 0xfffffffffffff2fe |
103 | ||
05b3e0c2 | 104 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
105 | // LDT or TSS descriptor in the GDT. 16 bytes. |
106 | struct segment_descriptor_64 { | |
107 | struct segment_descriptor s; | |
108 | u32 base_higher; | |
109 | u32 pad_zero; | |
110 | }; | |
111 | ||
112 | #endif | |
113 | ||
bccf2150 AK |
114 | static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl, |
115 | unsigned long arg); | |
116 | ||
6aa8b732 AK |
117 | unsigned long segment_base(u16 selector) |
118 | { | |
119 | struct descriptor_table gdt; | |
120 | struct segment_descriptor *d; | |
121 | unsigned long table_base; | |
122 | typedef unsigned long ul; | |
123 | unsigned long v; | |
124 | ||
125 | if (selector == 0) | |
126 | return 0; | |
127 | ||
128 | asm ("sgdt %0" : "=m"(gdt)); | |
129 | table_base = gdt.base; | |
130 | ||
131 | if (selector & 4) { /* from ldt */ | |
132 | u16 ldt_selector; | |
133 | ||
134 | asm ("sldt %0" : "=g"(ldt_selector)); | |
135 | table_base = segment_base(ldt_selector); | |
136 | } | |
137 | d = (struct segment_descriptor *)(table_base + (selector & ~7)); | |
138 | v = d->base_low | ((ul)d->base_mid << 16) | ((ul)d->base_high << 24); | |
05b3e0c2 | 139 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
140 | if (d->system == 0 |
141 | && (d->type == 2 || d->type == 9 || d->type == 11)) | |
142 | v |= ((ul)((struct segment_descriptor_64 *)d)->base_higher) << 32; | |
143 | #endif | |
144 | return v; | |
145 | } | |
146 | EXPORT_SYMBOL_GPL(segment_base); | |
147 | ||
5aacf0ca JM |
148 | static inline int valid_vcpu(int n) |
149 | { | |
150 | return likely(n >= 0 && n < KVM_MAX_VCPUS); | |
151 | } | |
152 | ||
7702fd1f AK |
153 | void kvm_load_guest_fpu(struct kvm_vcpu *vcpu) |
154 | { | |
155 | if (!vcpu->fpu_active || vcpu->guest_fpu_loaded) | |
156 | return; | |
157 | ||
158 | vcpu->guest_fpu_loaded = 1; | |
b114b080 RR |
159 | fx_save(&vcpu->host_fx_image); |
160 | fx_restore(&vcpu->guest_fx_image); | |
7702fd1f AK |
161 | } |
162 | EXPORT_SYMBOL_GPL(kvm_load_guest_fpu); | |
163 | ||
164 | void kvm_put_guest_fpu(struct kvm_vcpu *vcpu) | |
165 | { | |
166 | if (!vcpu->guest_fpu_loaded) | |
167 | return; | |
168 | ||
169 | vcpu->guest_fpu_loaded = 0; | |
b114b080 RR |
170 | fx_save(&vcpu->guest_fx_image); |
171 | fx_restore(&vcpu->host_fx_image); | |
7702fd1f AK |
172 | } |
173 | EXPORT_SYMBOL_GPL(kvm_put_guest_fpu); | |
174 | ||
bccf2150 AK |
175 | /* |
176 | * Switches to specified vcpu, until a matching vcpu_put() | |
177 | */ | |
178 | static void vcpu_load(struct kvm_vcpu *vcpu) | |
6aa8b732 | 179 | { |
15ad7146 AK |
180 | int cpu; |
181 | ||
bccf2150 | 182 | mutex_lock(&vcpu->mutex); |
15ad7146 AK |
183 | cpu = get_cpu(); |
184 | preempt_notifier_register(&vcpu->preempt_notifier); | |
185 | kvm_arch_ops->vcpu_load(vcpu, cpu); | |
186 | put_cpu(); | |
6aa8b732 AK |
187 | } |
188 | ||
6aa8b732 AK |
189 | static void vcpu_put(struct kvm_vcpu *vcpu) |
190 | { | |
15ad7146 | 191 | preempt_disable(); |
6aa8b732 | 192 | kvm_arch_ops->vcpu_put(vcpu); |
15ad7146 AK |
193 | preempt_notifier_unregister(&vcpu->preempt_notifier); |
194 | preempt_enable(); | |
6aa8b732 AK |
195 | mutex_unlock(&vcpu->mutex); |
196 | } | |
197 | ||
d9e368d6 AK |
198 | static void ack_flush(void *_completed) |
199 | { | |
200 | atomic_t *completed = _completed; | |
201 | ||
202 | atomic_inc(completed); | |
203 | } | |
204 | ||
205 | void kvm_flush_remote_tlbs(struct kvm *kvm) | |
206 | { | |
207 | int i, cpu, needed; | |
208 | cpumask_t cpus; | |
209 | struct kvm_vcpu *vcpu; | |
210 | atomic_t completed; | |
211 | ||
212 | atomic_set(&completed, 0); | |
213 | cpus_clear(cpus); | |
214 | needed = 0; | |
fb3f0f51 RR |
215 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
216 | vcpu = kvm->vcpus[i]; | |
217 | if (!vcpu) | |
218 | continue; | |
d9e368d6 AK |
219 | if (test_and_set_bit(KVM_TLB_FLUSH, &vcpu->requests)) |
220 | continue; | |
221 | cpu = vcpu->cpu; | |
222 | if (cpu != -1 && cpu != raw_smp_processor_id()) | |
223 | if (!cpu_isset(cpu, cpus)) { | |
224 | cpu_set(cpu, cpus); | |
225 | ++needed; | |
226 | } | |
227 | } | |
228 | ||
229 | /* | |
230 | * We really want smp_call_function_mask() here. But that's not | |
231 | * available, so ipi all cpus in parallel and wait for them | |
232 | * to complete. | |
233 | */ | |
234 | for (cpu = first_cpu(cpus); cpu != NR_CPUS; cpu = next_cpu(cpu, cpus)) | |
235 | smp_call_function_single(cpu, ack_flush, &completed, 1, 0); | |
236 | while (atomic_read(&completed) != needed) { | |
237 | cpu_relax(); | |
238 | barrier(); | |
239 | } | |
240 | } | |
241 | ||
fb3f0f51 RR |
242 | int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id) |
243 | { | |
244 | struct page *page; | |
245 | int r; | |
246 | ||
247 | mutex_init(&vcpu->mutex); | |
248 | vcpu->cpu = -1; | |
249 | vcpu->mmu.root_hpa = INVALID_PAGE; | |
250 | vcpu->kvm = kvm; | |
251 | vcpu->vcpu_id = id; | |
b6958ce4 | 252 | init_waitqueue_head(&vcpu->wq); |
fb3f0f51 RR |
253 | |
254 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
255 | if (!page) { | |
256 | r = -ENOMEM; | |
257 | goto fail; | |
258 | } | |
259 | vcpu->run = page_address(page); | |
260 | ||
261 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); | |
262 | if (!page) { | |
263 | r = -ENOMEM; | |
264 | goto fail_free_run; | |
265 | } | |
266 | vcpu->pio_data = page_address(page); | |
267 | ||
fb3f0f51 RR |
268 | r = kvm_mmu_create(vcpu); |
269 | if (r < 0) | |
270 | goto fail_free_pio_data; | |
271 | ||
272 | return 0; | |
273 | ||
274 | fail_free_pio_data: | |
275 | free_page((unsigned long)vcpu->pio_data); | |
276 | fail_free_run: | |
277 | free_page((unsigned long)vcpu->run); | |
278 | fail: | |
279 | return -ENOMEM; | |
280 | } | |
281 | EXPORT_SYMBOL_GPL(kvm_vcpu_init); | |
282 | ||
283 | void kvm_vcpu_uninit(struct kvm_vcpu *vcpu) | |
284 | { | |
285 | kvm_mmu_destroy(vcpu); | |
97222cc8 | 286 | kvm_free_apic(vcpu->apic); |
fb3f0f51 RR |
287 | free_page((unsigned long)vcpu->pio_data); |
288 | free_page((unsigned long)vcpu->run); | |
289 | } | |
290 | EXPORT_SYMBOL_GPL(kvm_vcpu_uninit); | |
291 | ||
f17abe9a | 292 | static struct kvm *kvm_create_vm(void) |
6aa8b732 AK |
293 | { |
294 | struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL); | |
6aa8b732 AK |
295 | |
296 | if (!kvm) | |
f17abe9a | 297 | return ERR_PTR(-ENOMEM); |
6aa8b732 | 298 | |
74906345 | 299 | kvm_io_bus_init(&kvm->pio_bus); |
11ec2804 | 300 | mutex_init(&kvm->lock); |
6aa8b732 | 301 | INIT_LIST_HEAD(&kvm->active_mmu_pages); |
2eeb2e94 | 302 | kvm_io_bus_init(&kvm->mmio_bus); |
5e58cfe4 RR |
303 | spin_lock(&kvm_lock); |
304 | list_add(&kvm->vm_list, &vm_list); | |
305 | spin_unlock(&kvm_lock); | |
f17abe9a AK |
306 | return kvm; |
307 | } | |
308 | ||
6aa8b732 AK |
309 | /* |
310 | * Free any memory in @free but not in @dont. | |
311 | */ | |
312 | static void kvm_free_physmem_slot(struct kvm_memory_slot *free, | |
313 | struct kvm_memory_slot *dont) | |
314 | { | |
315 | int i; | |
316 | ||
317 | if (!dont || free->phys_mem != dont->phys_mem) | |
318 | if (free->phys_mem) { | |
319 | for (i = 0; i < free->npages; ++i) | |
55a54f79 AK |
320 | if (free->phys_mem[i]) |
321 | __free_page(free->phys_mem[i]); | |
6aa8b732 AK |
322 | vfree(free->phys_mem); |
323 | } | |
324 | ||
325 | if (!dont || free->dirty_bitmap != dont->dirty_bitmap) | |
326 | vfree(free->dirty_bitmap); | |
327 | ||
8b6d44c7 | 328 | free->phys_mem = NULL; |
6aa8b732 | 329 | free->npages = 0; |
8b6d44c7 | 330 | free->dirty_bitmap = NULL; |
6aa8b732 AK |
331 | } |
332 | ||
333 | static void kvm_free_physmem(struct kvm *kvm) | |
334 | { | |
335 | int i; | |
336 | ||
337 | for (i = 0; i < kvm->nmemslots; ++i) | |
8b6d44c7 | 338 | kvm_free_physmem_slot(&kvm->memslots[i], NULL); |
6aa8b732 AK |
339 | } |
340 | ||
039576c0 AK |
341 | static void free_pio_guest_pages(struct kvm_vcpu *vcpu) |
342 | { | |
343 | int i; | |
344 | ||
3077c451 | 345 | for (i = 0; i < ARRAY_SIZE(vcpu->pio.guest_pages); ++i) |
039576c0 AK |
346 | if (vcpu->pio.guest_pages[i]) { |
347 | __free_page(vcpu->pio.guest_pages[i]); | |
348 | vcpu->pio.guest_pages[i] = NULL; | |
349 | } | |
350 | } | |
351 | ||
7b53aa56 AK |
352 | static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu) |
353 | { | |
7b53aa56 AK |
354 | vcpu_load(vcpu); |
355 | kvm_mmu_unload(vcpu); | |
356 | vcpu_put(vcpu); | |
357 | } | |
358 | ||
6aa8b732 AK |
359 | static void kvm_free_vcpus(struct kvm *kvm) |
360 | { | |
361 | unsigned int i; | |
362 | ||
7b53aa56 AK |
363 | /* |
364 | * Unpin any mmu pages first. | |
365 | */ | |
366 | for (i = 0; i < KVM_MAX_VCPUS; ++i) | |
fb3f0f51 RR |
367 | if (kvm->vcpus[i]) |
368 | kvm_unload_vcpu_mmu(kvm->vcpus[i]); | |
369 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
370 | if (kvm->vcpus[i]) { | |
371 | kvm_arch_ops->vcpu_free(kvm->vcpus[i]); | |
372 | kvm->vcpus[i] = NULL; | |
373 | } | |
374 | } | |
375 | ||
6aa8b732 AK |
376 | } |
377 | ||
f17abe9a AK |
378 | static void kvm_destroy_vm(struct kvm *kvm) |
379 | { | |
133de902 AK |
380 | spin_lock(&kvm_lock); |
381 | list_del(&kvm->vm_list); | |
382 | spin_unlock(&kvm_lock); | |
74906345 | 383 | kvm_io_bus_destroy(&kvm->pio_bus); |
2eeb2e94 | 384 | kvm_io_bus_destroy(&kvm->mmio_bus); |
85f455f7 | 385 | kfree(kvm->vpic); |
1fd4f2a5 | 386 | kfree(kvm->vioapic); |
6aa8b732 AK |
387 | kvm_free_vcpus(kvm); |
388 | kvm_free_physmem(kvm); | |
389 | kfree(kvm); | |
f17abe9a AK |
390 | } |
391 | ||
392 | static int kvm_vm_release(struct inode *inode, struct file *filp) | |
393 | { | |
394 | struct kvm *kvm = filp->private_data; | |
395 | ||
396 | kvm_destroy_vm(kvm); | |
6aa8b732 AK |
397 | return 0; |
398 | } | |
399 | ||
400 | static void inject_gp(struct kvm_vcpu *vcpu) | |
401 | { | |
402 | kvm_arch_ops->inject_gp(vcpu, 0); | |
403 | } | |
404 | ||
1342d353 AK |
405 | /* |
406 | * Load the pae pdptrs. Return true is they are all valid. | |
407 | */ | |
408 | static int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3) | |
6aa8b732 AK |
409 | { |
410 | gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT; | |
1342d353 | 411 | unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2; |
6aa8b732 | 412 | int i; |
6aa8b732 | 413 | u64 *pdpt; |
1342d353 | 414 | int ret; |
954bbbc2 | 415 | struct page *page; |
c820c2aa | 416 | u64 pdpte[ARRAY_SIZE(vcpu->pdptrs)]; |
6aa8b732 | 417 | |
11ec2804 | 418 | mutex_lock(&vcpu->kvm->lock); |
954bbbc2 | 419 | page = gfn_to_page(vcpu->kvm, pdpt_gfn); |
c820c2aa RR |
420 | if (!page) { |
421 | ret = 0; | |
422 | goto out; | |
423 | } | |
424 | ||
954bbbc2 | 425 | pdpt = kmap_atomic(page, KM_USER0); |
c820c2aa RR |
426 | memcpy(pdpte, pdpt+offset, sizeof(pdpte)); |
427 | kunmap_atomic(pdpt, KM_USER0); | |
6aa8b732 | 428 | |
c820c2aa RR |
429 | for (i = 0; i < ARRAY_SIZE(pdpte); ++i) { |
430 | if ((pdpte[i] & 1) && (pdpte[i] & 0xfffffff0000001e6ull)) { | |
1342d353 AK |
431 | ret = 0; |
432 | goto out; | |
433 | } | |
6aa8b732 | 434 | } |
c820c2aa | 435 | ret = 1; |
6aa8b732 | 436 | |
c820c2aa | 437 | memcpy(vcpu->pdptrs, pdpte, sizeof(vcpu->pdptrs)); |
1342d353 | 438 | out: |
11ec2804 | 439 | mutex_unlock(&vcpu->kvm->lock); |
6aa8b732 | 440 | |
1342d353 | 441 | return ret; |
6aa8b732 AK |
442 | } |
443 | ||
444 | void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) | |
445 | { | |
707d92fa | 446 | if (cr0 & CR0_RESERVED_BITS) { |
6aa8b732 AK |
447 | printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n", |
448 | cr0, vcpu->cr0); | |
449 | inject_gp(vcpu); | |
450 | return; | |
451 | } | |
452 | ||
707d92fa | 453 | if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) { |
6aa8b732 AK |
454 | printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n"); |
455 | inject_gp(vcpu); | |
456 | return; | |
457 | } | |
458 | ||
707d92fa | 459 | if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) { |
6aa8b732 AK |
460 | printk(KERN_DEBUG "set_cr0: #GP, set PG flag " |
461 | "and a clear PE flag\n"); | |
462 | inject_gp(vcpu); | |
463 | return; | |
464 | } | |
465 | ||
707d92fa | 466 | if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) { |
05b3e0c2 | 467 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
468 | if ((vcpu->shadow_efer & EFER_LME)) { |
469 | int cs_db, cs_l; | |
470 | ||
471 | if (!is_pae(vcpu)) { | |
472 | printk(KERN_DEBUG "set_cr0: #GP, start paging " | |
473 | "in long mode while PAE is disabled\n"); | |
474 | inject_gp(vcpu); | |
475 | return; | |
476 | } | |
477 | kvm_arch_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
478 | if (cs_l) { | |
479 | printk(KERN_DEBUG "set_cr0: #GP, start paging " | |
480 | "in long mode while CS.L == 1\n"); | |
481 | inject_gp(vcpu); | |
482 | return; | |
483 | ||
484 | } | |
485 | } else | |
486 | #endif | |
1342d353 | 487 | if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->cr3)) { |
6aa8b732 AK |
488 | printk(KERN_DEBUG "set_cr0: #GP, pdptrs " |
489 | "reserved bits\n"); | |
490 | inject_gp(vcpu); | |
491 | return; | |
492 | } | |
493 | ||
494 | } | |
495 | ||
496 | kvm_arch_ops->set_cr0(vcpu, cr0); | |
497 | vcpu->cr0 = cr0; | |
498 | ||
11ec2804 | 499 | mutex_lock(&vcpu->kvm->lock); |
6aa8b732 | 500 | kvm_mmu_reset_context(vcpu); |
11ec2804 | 501 | mutex_unlock(&vcpu->kvm->lock); |
6aa8b732 AK |
502 | return; |
503 | } | |
504 | EXPORT_SYMBOL_GPL(set_cr0); | |
505 | ||
506 | void lmsw(struct kvm_vcpu *vcpu, unsigned long msw) | |
507 | { | |
508 | set_cr0(vcpu, (vcpu->cr0 & ~0x0ful) | (msw & 0x0f)); | |
509 | } | |
510 | EXPORT_SYMBOL_GPL(lmsw); | |
511 | ||
512 | void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4) | |
513 | { | |
66aee91a | 514 | if (cr4 & CR4_RESERVED_BITS) { |
6aa8b732 AK |
515 | printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n"); |
516 | inject_gp(vcpu); | |
517 | return; | |
518 | } | |
519 | ||
a9058ecd | 520 | if (is_long_mode(vcpu)) { |
66aee91a | 521 | if (!(cr4 & X86_CR4_PAE)) { |
6aa8b732 AK |
522 | printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while " |
523 | "in long mode\n"); | |
524 | inject_gp(vcpu); | |
525 | return; | |
526 | } | |
66aee91a | 527 | } else if (is_paging(vcpu) && !is_pae(vcpu) && (cr4 & X86_CR4_PAE) |
1342d353 | 528 | && !load_pdptrs(vcpu, vcpu->cr3)) { |
6aa8b732 AK |
529 | printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n"); |
530 | inject_gp(vcpu); | |
310bc76c | 531 | return; |
6aa8b732 AK |
532 | } |
533 | ||
66aee91a | 534 | if (cr4 & X86_CR4_VMXE) { |
6aa8b732 AK |
535 | printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n"); |
536 | inject_gp(vcpu); | |
537 | return; | |
538 | } | |
539 | kvm_arch_ops->set_cr4(vcpu, cr4); | |
11ec2804 | 540 | mutex_lock(&vcpu->kvm->lock); |
6aa8b732 | 541 | kvm_mmu_reset_context(vcpu); |
11ec2804 | 542 | mutex_unlock(&vcpu->kvm->lock); |
6aa8b732 AK |
543 | } |
544 | EXPORT_SYMBOL_GPL(set_cr4); | |
545 | ||
546 | void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3) | |
547 | { | |
a9058ecd | 548 | if (is_long_mode(vcpu)) { |
f802a307 | 549 | if (cr3 & CR3_L_MODE_RESERVED_BITS) { |
6aa8b732 AK |
550 | printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n"); |
551 | inject_gp(vcpu); | |
552 | return; | |
553 | } | |
554 | } else { | |
f802a307 RR |
555 | if (is_pae(vcpu)) { |
556 | if (cr3 & CR3_PAE_RESERVED_BITS) { | |
557 | printk(KERN_DEBUG | |
558 | "set_cr3: #GP, reserved bits\n"); | |
559 | inject_gp(vcpu); | |
560 | return; | |
561 | } | |
562 | if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) { | |
563 | printk(KERN_DEBUG "set_cr3: #GP, pdptrs " | |
564 | "reserved bits\n"); | |
565 | inject_gp(vcpu); | |
566 | return; | |
567 | } | |
568 | } else { | |
569 | if (cr3 & CR3_NONPAE_RESERVED_BITS) { | |
570 | printk(KERN_DEBUG | |
571 | "set_cr3: #GP, reserved bits\n"); | |
572 | inject_gp(vcpu); | |
573 | return; | |
574 | } | |
6aa8b732 AK |
575 | } |
576 | } | |
577 | ||
11ec2804 | 578 | mutex_lock(&vcpu->kvm->lock); |
d21225ee IM |
579 | /* |
580 | * Does the new cr3 value map to physical memory? (Note, we | |
581 | * catch an invalid cr3 even in real-mode, because it would | |
582 | * cause trouble later on when we turn on paging anyway.) | |
583 | * | |
584 | * A real CPU would silently accept an invalid cr3 and would | |
585 | * attempt to use it - with largely undefined (and often hard | |
586 | * to debug) behavior on the guest side. | |
587 | */ | |
588 | if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT))) | |
589 | inject_gp(vcpu); | |
fb764416 RR |
590 | else { |
591 | vcpu->cr3 = cr3; | |
d21225ee | 592 | vcpu->mmu.new_cr3(vcpu); |
fb764416 | 593 | } |
11ec2804 | 594 | mutex_unlock(&vcpu->kvm->lock); |
6aa8b732 AK |
595 | } |
596 | EXPORT_SYMBOL_GPL(set_cr3); | |
597 | ||
598 | void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8) | |
599 | { | |
7075bc81 | 600 | if (cr8 & CR8_RESERVED_BITS) { |
6aa8b732 AK |
601 | printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8); |
602 | inject_gp(vcpu); | |
603 | return; | |
604 | } | |
97222cc8 ED |
605 | if (irqchip_in_kernel(vcpu->kvm)) |
606 | kvm_lapic_set_tpr(vcpu, cr8); | |
607 | else | |
608 | vcpu->cr8 = cr8; | |
6aa8b732 AK |
609 | } |
610 | EXPORT_SYMBOL_GPL(set_cr8); | |
611 | ||
7017fc3d ED |
612 | unsigned long get_cr8(struct kvm_vcpu *vcpu) |
613 | { | |
97222cc8 ED |
614 | if (irqchip_in_kernel(vcpu->kvm)) |
615 | return kvm_lapic_get_cr8(vcpu); | |
616 | else | |
617 | return vcpu->cr8; | |
7017fc3d ED |
618 | } |
619 | EXPORT_SYMBOL_GPL(get_cr8); | |
620 | ||
621 | u64 kvm_get_apic_base(struct kvm_vcpu *vcpu) | |
622 | { | |
97222cc8 ED |
623 | if (irqchip_in_kernel(vcpu->kvm)) |
624 | return vcpu->apic_base; | |
625 | else | |
626 | return vcpu->apic_base; | |
7017fc3d ED |
627 | } |
628 | EXPORT_SYMBOL_GPL(kvm_get_apic_base); | |
629 | ||
630 | void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data) | |
631 | { | |
97222cc8 ED |
632 | /* TODO: reserve bits check */ |
633 | if (irqchip_in_kernel(vcpu->kvm)) | |
634 | kvm_lapic_set_base(vcpu, data); | |
635 | else | |
636 | vcpu->apic_base = data; | |
7017fc3d ED |
637 | } |
638 | EXPORT_SYMBOL_GPL(kvm_set_apic_base); | |
639 | ||
6aa8b732 AK |
640 | void fx_init(struct kvm_vcpu *vcpu) |
641 | { | |
b114b080 | 642 | unsigned after_mxcsr_mask; |
6aa8b732 | 643 | |
9bd01506 RR |
644 | /* Initialize guest FPU by resetting ours and saving into guest's */ |
645 | preempt_disable(); | |
b114b080 | 646 | fx_save(&vcpu->host_fx_image); |
6aa8b732 | 647 | fpu_init(); |
b114b080 RR |
648 | fx_save(&vcpu->guest_fx_image); |
649 | fx_restore(&vcpu->host_fx_image); | |
9bd01506 | 650 | preempt_enable(); |
6aa8b732 | 651 | |
b114b080 RR |
652 | after_mxcsr_mask = offsetof(struct i387_fxsave_struct, st_space); |
653 | vcpu->guest_fx_image.mxcsr = 0x1f80; | |
654 | memset((void *)&vcpu->guest_fx_image + after_mxcsr_mask, | |
655 | 0, sizeof(struct i387_fxsave_struct) - after_mxcsr_mask); | |
6aa8b732 AK |
656 | } |
657 | EXPORT_SYMBOL_GPL(fx_init); | |
658 | ||
6aa8b732 AK |
659 | /* |
660 | * Allocate some memory and give it an address in the guest physical address | |
661 | * space. | |
662 | * | |
663 | * Discontiguous memory is allowed, mostly for framebuffers. | |
664 | */ | |
2c6f5df9 AK |
665 | static int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, |
666 | struct kvm_memory_region *mem) | |
6aa8b732 AK |
667 | { |
668 | int r; | |
669 | gfn_t base_gfn; | |
670 | unsigned long npages; | |
671 | unsigned long i; | |
672 | struct kvm_memory_slot *memslot; | |
673 | struct kvm_memory_slot old, new; | |
674 | int memory_config_version; | |
675 | ||
676 | r = -EINVAL; | |
677 | /* General sanity checks */ | |
678 | if (mem->memory_size & (PAGE_SIZE - 1)) | |
679 | goto out; | |
680 | if (mem->guest_phys_addr & (PAGE_SIZE - 1)) | |
681 | goto out; | |
682 | if (mem->slot >= KVM_MEMORY_SLOTS) | |
683 | goto out; | |
684 | if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr) | |
685 | goto out; | |
686 | ||
687 | memslot = &kvm->memslots[mem->slot]; | |
688 | base_gfn = mem->guest_phys_addr >> PAGE_SHIFT; | |
689 | npages = mem->memory_size >> PAGE_SHIFT; | |
690 | ||
691 | if (!npages) | |
692 | mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES; | |
693 | ||
694 | raced: | |
11ec2804 | 695 | mutex_lock(&kvm->lock); |
6aa8b732 AK |
696 | |
697 | memory_config_version = kvm->memory_config_version; | |
698 | new = old = *memslot; | |
699 | ||
700 | new.base_gfn = base_gfn; | |
701 | new.npages = npages; | |
702 | new.flags = mem->flags; | |
703 | ||
704 | /* Disallow changing a memory slot's size. */ | |
705 | r = -EINVAL; | |
706 | if (npages && old.npages && npages != old.npages) | |
707 | goto out_unlock; | |
708 | ||
709 | /* Check for overlaps */ | |
710 | r = -EEXIST; | |
711 | for (i = 0; i < KVM_MEMORY_SLOTS; ++i) { | |
712 | struct kvm_memory_slot *s = &kvm->memslots[i]; | |
713 | ||
714 | if (s == memslot) | |
715 | continue; | |
716 | if (!((base_gfn + npages <= s->base_gfn) || | |
717 | (base_gfn >= s->base_gfn + s->npages))) | |
718 | goto out_unlock; | |
719 | } | |
720 | /* | |
721 | * Do memory allocations outside lock. memory_config_version will | |
722 | * detect any races. | |
723 | */ | |
11ec2804 | 724 | mutex_unlock(&kvm->lock); |
6aa8b732 AK |
725 | |
726 | /* Deallocate if slot is being removed */ | |
727 | if (!npages) | |
8b6d44c7 | 728 | new.phys_mem = NULL; |
6aa8b732 AK |
729 | |
730 | /* Free page dirty bitmap if unneeded */ | |
731 | if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES)) | |
8b6d44c7 | 732 | new.dirty_bitmap = NULL; |
6aa8b732 AK |
733 | |
734 | r = -ENOMEM; | |
735 | ||
736 | /* Allocate if a slot is being created */ | |
737 | if (npages && !new.phys_mem) { | |
738 | new.phys_mem = vmalloc(npages * sizeof(struct page *)); | |
739 | ||
740 | if (!new.phys_mem) | |
741 | goto out_free; | |
742 | ||
743 | memset(new.phys_mem, 0, npages * sizeof(struct page *)); | |
744 | for (i = 0; i < npages; ++i) { | |
745 | new.phys_mem[i] = alloc_page(GFP_HIGHUSER | |
746 | | __GFP_ZERO); | |
747 | if (!new.phys_mem[i]) | |
748 | goto out_free; | |
5972e953 | 749 | set_page_private(new.phys_mem[i],0); |
6aa8b732 AK |
750 | } |
751 | } | |
752 | ||
753 | /* Allocate page dirty bitmap if needed */ | |
754 | if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) { | |
755 | unsigned dirty_bytes = ALIGN(npages, BITS_PER_LONG) / 8; | |
756 | ||
757 | new.dirty_bitmap = vmalloc(dirty_bytes); | |
758 | if (!new.dirty_bitmap) | |
759 | goto out_free; | |
760 | memset(new.dirty_bitmap, 0, dirty_bytes); | |
761 | } | |
762 | ||
11ec2804 | 763 | mutex_lock(&kvm->lock); |
6aa8b732 AK |
764 | |
765 | if (memory_config_version != kvm->memory_config_version) { | |
11ec2804 | 766 | mutex_unlock(&kvm->lock); |
6aa8b732 AK |
767 | kvm_free_physmem_slot(&new, &old); |
768 | goto raced; | |
769 | } | |
770 | ||
771 | r = -EAGAIN; | |
772 | if (kvm->busy) | |
773 | goto out_unlock; | |
774 | ||
775 | if (mem->slot >= kvm->nmemslots) | |
776 | kvm->nmemslots = mem->slot + 1; | |
777 | ||
778 | *memslot = new; | |
779 | ++kvm->memory_config_version; | |
780 | ||
90cb0529 AK |
781 | kvm_mmu_slot_remove_write_access(kvm, mem->slot); |
782 | kvm_flush_remote_tlbs(kvm); | |
6aa8b732 | 783 | |
11ec2804 | 784 | mutex_unlock(&kvm->lock); |
6aa8b732 AK |
785 | |
786 | kvm_free_physmem_slot(&old, &new); | |
787 | return 0; | |
788 | ||
789 | out_unlock: | |
11ec2804 | 790 | mutex_unlock(&kvm->lock); |
6aa8b732 AK |
791 | out_free: |
792 | kvm_free_physmem_slot(&new, &old); | |
793 | out: | |
794 | return r; | |
795 | } | |
796 | ||
797 | /* | |
798 | * Get (and clear) the dirty memory log for a memory slot. | |
799 | */ | |
2c6f5df9 AK |
800 | static int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, |
801 | struct kvm_dirty_log *log) | |
6aa8b732 AK |
802 | { |
803 | struct kvm_memory_slot *memslot; | |
804 | int r, i; | |
805 | int n; | |
806 | unsigned long any = 0; | |
807 | ||
11ec2804 | 808 | mutex_lock(&kvm->lock); |
6aa8b732 AK |
809 | |
810 | /* | |
811 | * Prevent changes to guest memory configuration even while the lock | |
812 | * is not taken. | |
813 | */ | |
814 | ++kvm->busy; | |
11ec2804 | 815 | mutex_unlock(&kvm->lock); |
6aa8b732 AK |
816 | r = -EINVAL; |
817 | if (log->slot >= KVM_MEMORY_SLOTS) | |
818 | goto out; | |
819 | ||
820 | memslot = &kvm->memslots[log->slot]; | |
821 | r = -ENOENT; | |
822 | if (!memslot->dirty_bitmap) | |
823 | goto out; | |
824 | ||
cd1a4a98 | 825 | n = ALIGN(memslot->npages, BITS_PER_LONG) / 8; |
6aa8b732 | 826 | |
cd1a4a98 | 827 | for (i = 0; !any && i < n/sizeof(long); ++i) |
6aa8b732 AK |
828 | any = memslot->dirty_bitmap[i]; |
829 | ||
830 | r = -EFAULT; | |
831 | if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n)) | |
832 | goto out; | |
833 | ||
39214915 RR |
834 | /* If nothing is dirty, don't bother messing with page tables. */ |
835 | if (any) { | |
836 | mutex_lock(&kvm->lock); | |
837 | kvm_mmu_slot_remove_write_access(kvm, log->slot); | |
838 | kvm_flush_remote_tlbs(kvm); | |
839 | memset(memslot->dirty_bitmap, 0, n); | |
840 | mutex_unlock(&kvm->lock); | |
841 | } | |
6aa8b732 AK |
842 | |
843 | r = 0; | |
844 | ||
845 | out: | |
11ec2804 | 846 | mutex_lock(&kvm->lock); |
6aa8b732 | 847 | --kvm->busy; |
11ec2804 | 848 | mutex_unlock(&kvm->lock); |
6aa8b732 AK |
849 | return r; |
850 | } | |
851 | ||
e8207547 AK |
852 | /* |
853 | * Set a new alias region. Aliases map a portion of physical memory into | |
854 | * another portion. This is useful for memory windows, for example the PC | |
855 | * VGA region. | |
856 | */ | |
857 | static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm, | |
858 | struct kvm_memory_alias *alias) | |
859 | { | |
860 | int r, n; | |
861 | struct kvm_mem_alias *p; | |
862 | ||
863 | r = -EINVAL; | |
864 | /* General sanity checks */ | |
865 | if (alias->memory_size & (PAGE_SIZE - 1)) | |
866 | goto out; | |
867 | if (alias->guest_phys_addr & (PAGE_SIZE - 1)) | |
868 | goto out; | |
869 | if (alias->slot >= KVM_ALIAS_SLOTS) | |
870 | goto out; | |
871 | if (alias->guest_phys_addr + alias->memory_size | |
872 | < alias->guest_phys_addr) | |
873 | goto out; | |
874 | if (alias->target_phys_addr + alias->memory_size | |
875 | < alias->target_phys_addr) | |
876 | goto out; | |
877 | ||
11ec2804 | 878 | mutex_lock(&kvm->lock); |
e8207547 AK |
879 | |
880 | p = &kvm->aliases[alias->slot]; | |
881 | p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT; | |
882 | p->npages = alias->memory_size >> PAGE_SHIFT; | |
883 | p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT; | |
884 | ||
885 | for (n = KVM_ALIAS_SLOTS; n > 0; --n) | |
886 | if (kvm->aliases[n - 1].npages) | |
887 | break; | |
888 | kvm->naliases = n; | |
889 | ||
90cb0529 | 890 | kvm_mmu_zap_all(kvm); |
e8207547 | 891 | |
11ec2804 | 892 | mutex_unlock(&kvm->lock); |
e8207547 AK |
893 | |
894 | return 0; | |
895 | ||
896 | out: | |
897 | return r; | |
898 | } | |
899 | ||
6ceb9d79 HQ |
900 | static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) |
901 | { | |
902 | int r; | |
903 | ||
904 | r = 0; | |
905 | switch (chip->chip_id) { | |
906 | case KVM_IRQCHIP_PIC_MASTER: | |
907 | memcpy (&chip->chip.pic, | |
908 | &pic_irqchip(kvm)->pics[0], | |
909 | sizeof(struct kvm_pic_state)); | |
910 | break; | |
911 | case KVM_IRQCHIP_PIC_SLAVE: | |
912 | memcpy (&chip->chip.pic, | |
913 | &pic_irqchip(kvm)->pics[1], | |
914 | sizeof(struct kvm_pic_state)); | |
915 | break; | |
916 | default: | |
917 | r = -EINVAL; | |
918 | break; | |
919 | } | |
920 | return r; | |
921 | } | |
922 | ||
923 | static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip) | |
924 | { | |
925 | int r; | |
926 | ||
927 | r = 0; | |
928 | switch (chip->chip_id) { | |
929 | case KVM_IRQCHIP_PIC_MASTER: | |
930 | memcpy (&pic_irqchip(kvm)->pics[0], | |
931 | &chip->chip.pic, | |
932 | sizeof(struct kvm_pic_state)); | |
933 | break; | |
934 | case KVM_IRQCHIP_PIC_SLAVE: | |
935 | memcpy (&pic_irqchip(kvm)->pics[1], | |
936 | &chip->chip.pic, | |
937 | sizeof(struct kvm_pic_state)); | |
938 | break; | |
939 | default: | |
940 | r = -EINVAL; | |
941 | break; | |
942 | } | |
943 | kvm_pic_update_irq(pic_irqchip(kvm)); | |
944 | return r; | |
945 | } | |
946 | ||
e8207547 AK |
947 | static gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn) |
948 | { | |
949 | int i; | |
950 | struct kvm_mem_alias *alias; | |
951 | ||
952 | for (i = 0; i < kvm->naliases; ++i) { | |
953 | alias = &kvm->aliases[i]; | |
954 | if (gfn >= alias->base_gfn | |
955 | && gfn < alias->base_gfn + alias->npages) | |
956 | return alias->target_gfn + gfn - alias->base_gfn; | |
957 | } | |
958 | return gfn; | |
959 | } | |
960 | ||
961 | static struct kvm_memory_slot *__gfn_to_memslot(struct kvm *kvm, gfn_t gfn) | |
6aa8b732 AK |
962 | { |
963 | int i; | |
964 | ||
965 | for (i = 0; i < kvm->nmemslots; ++i) { | |
966 | struct kvm_memory_slot *memslot = &kvm->memslots[i]; | |
967 | ||
968 | if (gfn >= memslot->base_gfn | |
969 | && gfn < memslot->base_gfn + memslot->npages) | |
970 | return memslot; | |
971 | } | |
8b6d44c7 | 972 | return NULL; |
6aa8b732 | 973 | } |
e8207547 AK |
974 | |
975 | struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn) | |
976 | { | |
977 | gfn = unalias_gfn(kvm, gfn); | |
978 | return __gfn_to_memslot(kvm, gfn); | |
979 | } | |
6aa8b732 | 980 | |
954bbbc2 AK |
981 | struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn) |
982 | { | |
983 | struct kvm_memory_slot *slot; | |
984 | ||
e8207547 AK |
985 | gfn = unalias_gfn(kvm, gfn); |
986 | slot = __gfn_to_memslot(kvm, gfn); | |
954bbbc2 AK |
987 | if (!slot) |
988 | return NULL; | |
989 | return slot->phys_mem[gfn - slot->base_gfn]; | |
990 | } | |
991 | EXPORT_SYMBOL_GPL(gfn_to_page); | |
992 | ||
7e9d619d | 993 | /* WARNING: Does not work on aliased pages. */ |
6aa8b732 AK |
994 | void mark_page_dirty(struct kvm *kvm, gfn_t gfn) |
995 | { | |
31389947 | 996 | struct kvm_memory_slot *memslot; |
6aa8b732 | 997 | |
7e9d619d RR |
998 | memslot = __gfn_to_memslot(kvm, gfn); |
999 | if (memslot && memslot->dirty_bitmap) { | |
1000 | unsigned long rel_gfn = gfn - memslot->base_gfn; | |
6aa8b732 | 1001 | |
7e9d619d RR |
1002 | /* avoid RMW */ |
1003 | if (!test_bit(rel_gfn, memslot->dirty_bitmap)) | |
1004 | set_bit(rel_gfn, memslot->dirty_bitmap); | |
6aa8b732 AK |
1005 | } |
1006 | } | |
1007 | ||
e7d5d76c | 1008 | int emulator_read_std(unsigned long addr, |
4c690a1e | 1009 | void *val, |
6aa8b732 | 1010 | unsigned int bytes, |
cebff02b | 1011 | struct kvm_vcpu *vcpu) |
6aa8b732 | 1012 | { |
6aa8b732 AK |
1013 | void *data = val; |
1014 | ||
1015 | while (bytes) { | |
1016 | gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr); | |
1017 | unsigned offset = addr & (PAGE_SIZE-1); | |
1018 | unsigned tocopy = min(bytes, (unsigned)PAGE_SIZE - offset); | |
1019 | unsigned long pfn; | |
954bbbc2 AK |
1020 | struct page *page; |
1021 | void *page_virt; | |
6aa8b732 AK |
1022 | |
1023 | if (gpa == UNMAPPED_GVA) | |
1024 | return X86EMUL_PROPAGATE_FAULT; | |
1025 | pfn = gpa >> PAGE_SHIFT; | |
954bbbc2 AK |
1026 | page = gfn_to_page(vcpu->kvm, pfn); |
1027 | if (!page) | |
6aa8b732 | 1028 | return X86EMUL_UNHANDLEABLE; |
954bbbc2 | 1029 | page_virt = kmap_atomic(page, KM_USER0); |
6aa8b732 | 1030 | |
954bbbc2 | 1031 | memcpy(data, page_virt + offset, tocopy); |
6aa8b732 | 1032 | |
954bbbc2 | 1033 | kunmap_atomic(page_virt, KM_USER0); |
6aa8b732 AK |
1034 | |
1035 | bytes -= tocopy; | |
1036 | data += tocopy; | |
1037 | addr += tocopy; | |
1038 | } | |
1039 | ||
1040 | return X86EMUL_CONTINUE; | |
1041 | } | |
e7d5d76c | 1042 | EXPORT_SYMBOL_GPL(emulator_read_std); |
6aa8b732 AK |
1043 | |
1044 | static int emulator_write_std(unsigned long addr, | |
4c690a1e | 1045 | const void *val, |
6aa8b732 | 1046 | unsigned int bytes, |
cebff02b | 1047 | struct kvm_vcpu *vcpu) |
6aa8b732 | 1048 | { |
f0242478 | 1049 | pr_unimpl(vcpu, "emulator_write_std: addr %lx n %d\n", addr, bytes); |
6aa8b732 AK |
1050 | return X86EMUL_UNHANDLEABLE; |
1051 | } | |
1052 | ||
97222cc8 ED |
1053 | /* |
1054 | * Only apic need an MMIO device hook, so shortcut now.. | |
1055 | */ | |
1056 | static struct kvm_io_device *vcpu_find_pervcpu_dev(struct kvm_vcpu *vcpu, | |
1057 | gpa_t addr) | |
1058 | { | |
1059 | struct kvm_io_device *dev; | |
1060 | ||
1061 | if (vcpu->apic) { | |
1062 | dev = &vcpu->apic->dev; | |
1063 | if (dev->in_range(dev, addr)) | |
1064 | return dev; | |
1065 | } | |
1066 | return NULL; | |
1067 | } | |
1068 | ||
2eeb2e94 GH |
1069 | static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu, |
1070 | gpa_t addr) | |
1071 | { | |
97222cc8 ED |
1072 | struct kvm_io_device *dev; |
1073 | ||
1074 | dev = vcpu_find_pervcpu_dev(vcpu, addr); | |
1075 | if (dev == NULL) | |
1076 | dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr); | |
1077 | return dev; | |
2eeb2e94 GH |
1078 | } |
1079 | ||
74906345 ED |
1080 | static struct kvm_io_device *vcpu_find_pio_dev(struct kvm_vcpu *vcpu, |
1081 | gpa_t addr) | |
1082 | { | |
1083 | return kvm_io_bus_find_dev(&vcpu->kvm->pio_bus, addr); | |
1084 | } | |
1085 | ||
6aa8b732 | 1086 | static int emulator_read_emulated(unsigned long addr, |
4c690a1e | 1087 | void *val, |
6aa8b732 | 1088 | unsigned int bytes, |
cebff02b | 1089 | struct kvm_vcpu *vcpu) |
6aa8b732 | 1090 | { |
2eeb2e94 GH |
1091 | struct kvm_io_device *mmio_dev; |
1092 | gpa_t gpa; | |
6aa8b732 AK |
1093 | |
1094 | if (vcpu->mmio_read_completed) { | |
1095 | memcpy(val, vcpu->mmio_data, bytes); | |
1096 | vcpu->mmio_read_completed = 0; | |
1097 | return X86EMUL_CONTINUE; | |
cebff02b | 1098 | } else if (emulator_read_std(addr, val, bytes, vcpu) |
6aa8b732 AK |
1099 | == X86EMUL_CONTINUE) |
1100 | return X86EMUL_CONTINUE; | |
d27d4aca | 1101 | |
2eeb2e94 GH |
1102 | gpa = vcpu->mmu.gva_to_gpa(vcpu, addr); |
1103 | if (gpa == UNMAPPED_GVA) | |
1104 | return X86EMUL_PROPAGATE_FAULT; | |
6aa8b732 | 1105 | |
2eeb2e94 GH |
1106 | /* |
1107 | * Is this MMIO handled locally? | |
1108 | */ | |
1109 | mmio_dev = vcpu_find_mmio_dev(vcpu, gpa); | |
1110 | if (mmio_dev) { | |
1111 | kvm_iodevice_read(mmio_dev, gpa, bytes, val); | |
1112 | return X86EMUL_CONTINUE; | |
6aa8b732 | 1113 | } |
2eeb2e94 GH |
1114 | |
1115 | vcpu->mmio_needed = 1; | |
1116 | vcpu->mmio_phys_addr = gpa; | |
1117 | vcpu->mmio_size = bytes; | |
1118 | vcpu->mmio_is_write = 0; | |
1119 | ||
1120 | return X86EMUL_UNHANDLEABLE; | |
6aa8b732 AK |
1121 | } |
1122 | ||
da4a00f0 | 1123 | static int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa, |
4c690a1e | 1124 | const void *val, int bytes) |
da4a00f0 | 1125 | { |
da4a00f0 AK |
1126 | struct page *page; |
1127 | void *virt; | |
1128 | ||
1129 | if (((gpa + bytes - 1) >> PAGE_SHIFT) != (gpa >> PAGE_SHIFT)) | |
1130 | return 0; | |
954bbbc2 AK |
1131 | page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT); |
1132 | if (!page) | |
da4a00f0 | 1133 | return 0; |
ab51a434 | 1134 | mark_page_dirty(vcpu->kvm, gpa >> PAGE_SHIFT); |
da4a00f0 | 1135 | virt = kmap_atomic(page, KM_USER0); |
fe551881 | 1136 | kvm_mmu_pte_write(vcpu, gpa, val, bytes); |
7cfa4b0a | 1137 | memcpy(virt + offset_in_page(gpa), val, bytes); |
da4a00f0 | 1138 | kunmap_atomic(virt, KM_USER0); |
da4a00f0 AK |
1139 | return 1; |
1140 | } | |
1141 | ||
b0fcd903 AK |
1142 | static int emulator_write_emulated_onepage(unsigned long addr, |
1143 | const void *val, | |
1144 | unsigned int bytes, | |
cebff02b | 1145 | struct kvm_vcpu *vcpu) |
6aa8b732 | 1146 | { |
2eeb2e94 GH |
1147 | struct kvm_io_device *mmio_dev; |
1148 | gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr); | |
6aa8b732 | 1149 | |
c9047f53 AK |
1150 | if (gpa == UNMAPPED_GVA) { |
1151 | kvm_arch_ops->inject_page_fault(vcpu, addr, 2); | |
6aa8b732 | 1152 | return X86EMUL_PROPAGATE_FAULT; |
c9047f53 | 1153 | } |
6aa8b732 | 1154 | |
da4a00f0 AK |
1155 | if (emulator_write_phys(vcpu, gpa, val, bytes)) |
1156 | return X86EMUL_CONTINUE; | |
1157 | ||
2eeb2e94 GH |
1158 | /* |
1159 | * Is this MMIO handled locally? | |
1160 | */ | |
1161 | mmio_dev = vcpu_find_mmio_dev(vcpu, gpa); | |
1162 | if (mmio_dev) { | |
1163 | kvm_iodevice_write(mmio_dev, gpa, bytes, val); | |
1164 | return X86EMUL_CONTINUE; | |
1165 | } | |
1166 | ||
6aa8b732 AK |
1167 | vcpu->mmio_needed = 1; |
1168 | vcpu->mmio_phys_addr = gpa; | |
1169 | vcpu->mmio_size = bytes; | |
1170 | vcpu->mmio_is_write = 1; | |
4c690a1e | 1171 | memcpy(vcpu->mmio_data, val, bytes); |
6aa8b732 AK |
1172 | |
1173 | return X86EMUL_CONTINUE; | |
1174 | } | |
1175 | ||
e7d5d76c | 1176 | int emulator_write_emulated(unsigned long addr, |
b0fcd903 AK |
1177 | const void *val, |
1178 | unsigned int bytes, | |
cebff02b | 1179 | struct kvm_vcpu *vcpu) |
b0fcd903 AK |
1180 | { |
1181 | /* Crossing a page boundary? */ | |
1182 | if (((addr + bytes - 1) ^ addr) & PAGE_MASK) { | |
1183 | int rc, now; | |
1184 | ||
1185 | now = -addr & ~PAGE_MASK; | |
cebff02b | 1186 | rc = emulator_write_emulated_onepage(addr, val, now, vcpu); |
b0fcd903 AK |
1187 | if (rc != X86EMUL_CONTINUE) |
1188 | return rc; | |
1189 | addr += now; | |
1190 | val += now; | |
1191 | bytes -= now; | |
1192 | } | |
cebff02b | 1193 | return emulator_write_emulated_onepage(addr, val, bytes, vcpu); |
b0fcd903 | 1194 | } |
e7d5d76c | 1195 | EXPORT_SYMBOL_GPL(emulator_write_emulated); |
b0fcd903 | 1196 | |
6aa8b732 | 1197 | static int emulator_cmpxchg_emulated(unsigned long addr, |
4c690a1e AK |
1198 | const void *old, |
1199 | const void *new, | |
6aa8b732 | 1200 | unsigned int bytes, |
cebff02b | 1201 | struct kvm_vcpu *vcpu) |
6aa8b732 AK |
1202 | { |
1203 | static int reported; | |
1204 | ||
1205 | if (!reported) { | |
1206 | reported = 1; | |
1207 | printk(KERN_WARNING "kvm: emulating exchange as write\n"); | |
1208 | } | |
cebff02b | 1209 | return emulator_write_emulated(addr, new, bytes, vcpu); |
6aa8b732 AK |
1210 | } |
1211 | ||
1212 | static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg) | |
1213 | { | |
1214 | return kvm_arch_ops->get_segment_base(vcpu, seg); | |
1215 | } | |
1216 | ||
1217 | int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address) | |
1218 | { | |
6aa8b732 AK |
1219 | return X86EMUL_CONTINUE; |
1220 | } | |
1221 | ||
1222 | int emulate_clts(struct kvm_vcpu *vcpu) | |
1223 | { | |
399badf3 | 1224 | unsigned long cr0; |
6aa8b732 | 1225 | |
707d92fa | 1226 | cr0 = vcpu->cr0 & ~X86_CR0_TS; |
6aa8b732 AK |
1227 | kvm_arch_ops->set_cr0(vcpu, cr0); |
1228 | return X86EMUL_CONTINUE; | |
1229 | } | |
1230 | ||
1231 | int emulator_get_dr(struct x86_emulate_ctxt* ctxt, int dr, unsigned long *dest) | |
1232 | { | |
1233 | struct kvm_vcpu *vcpu = ctxt->vcpu; | |
1234 | ||
1235 | switch (dr) { | |
1236 | case 0 ... 3: | |
1237 | *dest = kvm_arch_ops->get_dr(vcpu, dr); | |
1238 | return X86EMUL_CONTINUE; | |
1239 | default: | |
f0242478 | 1240 | pr_unimpl(vcpu, "%s: unexpected dr %u\n", __FUNCTION__, dr); |
6aa8b732 AK |
1241 | return X86EMUL_UNHANDLEABLE; |
1242 | } | |
1243 | } | |
1244 | ||
1245 | int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value) | |
1246 | { | |
1247 | unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U; | |
1248 | int exception; | |
1249 | ||
1250 | kvm_arch_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception); | |
1251 | if (exception) { | |
1252 | /* FIXME: better handling */ | |
1253 | return X86EMUL_UNHANDLEABLE; | |
1254 | } | |
1255 | return X86EMUL_CONTINUE; | |
1256 | } | |
1257 | ||
1258 | static void report_emulation_failure(struct x86_emulate_ctxt *ctxt) | |
1259 | { | |
1260 | static int reported; | |
1261 | u8 opcodes[4]; | |
1262 | unsigned long rip = ctxt->vcpu->rip; | |
1263 | unsigned long rip_linear; | |
1264 | ||
1265 | rip_linear = rip + get_segment_base(ctxt->vcpu, VCPU_SREG_CS); | |
1266 | ||
1267 | if (reported) | |
1268 | return; | |
1269 | ||
cebff02b | 1270 | emulator_read_std(rip_linear, (void *)opcodes, 4, ctxt->vcpu); |
6aa8b732 AK |
1271 | |
1272 | printk(KERN_ERR "emulation failed but !mmio_needed?" | |
1273 | " rip %lx %02x %02x %02x %02x\n", | |
1274 | rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]); | |
1275 | reported = 1; | |
1276 | } | |
1277 | ||
1278 | struct x86_emulate_ops emulate_ops = { | |
1279 | .read_std = emulator_read_std, | |
1280 | .write_std = emulator_write_std, | |
1281 | .read_emulated = emulator_read_emulated, | |
1282 | .write_emulated = emulator_write_emulated, | |
1283 | .cmpxchg_emulated = emulator_cmpxchg_emulated, | |
1284 | }; | |
1285 | ||
1286 | int emulate_instruction(struct kvm_vcpu *vcpu, | |
1287 | struct kvm_run *run, | |
1288 | unsigned long cr2, | |
1289 | u16 error_code) | |
1290 | { | |
1291 | struct x86_emulate_ctxt emulate_ctxt; | |
1292 | int r; | |
1293 | int cs_db, cs_l; | |
1294 | ||
e7df56e4 | 1295 | vcpu->mmio_fault_cr2 = cr2; |
6aa8b732 AK |
1296 | kvm_arch_ops->cache_regs(vcpu); |
1297 | ||
1298 | kvm_arch_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); | |
1299 | ||
1300 | emulate_ctxt.vcpu = vcpu; | |
1301 | emulate_ctxt.eflags = kvm_arch_ops->get_rflags(vcpu); | |
1302 | emulate_ctxt.cr2 = cr2; | |
1303 | emulate_ctxt.mode = (emulate_ctxt.eflags & X86_EFLAGS_VM) | |
1304 | ? X86EMUL_MODE_REAL : cs_l | |
1305 | ? X86EMUL_MODE_PROT64 : cs_db | |
1306 | ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16; | |
1307 | ||
1308 | if (emulate_ctxt.mode == X86EMUL_MODE_PROT64) { | |
1309 | emulate_ctxt.cs_base = 0; | |
1310 | emulate_ctxt.ds_base = 0; | |
1311 | emulate_ctxt.es_base = 0; | |
1312 | emulate_ctxt.ss_base = 0; | |
1313 | } else { | |
1314 | emulate_ctxt.cs_base = get_segment_base(vcpu, VCPU_SREG_CS); | |
1315 | emulate_ctxt.ds_base = get_segment_base(vcpu, VCPU_SREG_DS); | |
1316 | emulate_ctxt.es_base = get_segment_base(vcpu, VCPU_SREG_ES); | |
1317 | emulate_ctxt.ss_base = get_segment_base(vcpu, VCPU_SREG_SS); | |
1318 | } | |
1319 | ||
1320 | emulate_ctxt.gs_base = get_segment_base(vcpu, VCPU_SREG_GS); | |
1321 | emulate_ctxt.fs_base = get_segment_base(vcpu, VCPU_SREG_FS); | |
1322 | ||
1323 | vcpu->mmio_is_write = 0; | |
e70669ab | 1324 | vcpu->pio.string = 0; |
6aa8b732 | 1325 | r = x86_emulate_memop(&emulate_ctxt, &emulate_ops); |
e70669ab LV |
1326 | if (vcpu->pio.string) |
1327 | return EMULATE_DO_MMIO; | |
6aa8b732 AK |
1328 | |
1329 | if ((r || vcpu->mmio_is_write) && run) { | |
8fc0d085 | 1330 | run->exit_reason = KVM_EXIT_MMIO; |
6aa8b732 AK |
1331 | run->mmio.phys_addr = vcpu->mmio_phys_addr; |
1332 | memcpy(run->mmio.data, vcpu->mmio_data, 8); | |
1333 | run->mmio.len = vcpu->mmio_size; | |
1334 | run->mmio.is_write = vcpu->mmio_is_write; | |
1335 | } | |
1336 | ||
1337 | if (r) { | |
a436036b AK |
1338 | if (kvm_mmu_unprotect_page_virt(vcpu, cr2)) |
1339 | return EMULATE_DONE; | |
6aa8b732 AK |
1340 | if (!vcpu->mmio_needed) { |
1341 | report_emulation_failure(&emulate_ctxt); | |
1342 | return EMULATE_FAIL; | |
1343 | } | |
1344 | return EMULATE_DO_MMIO; | |
1345 | } | |
1346 | ||
1347 | kvm_arch_ops->decache_regs(vcpu); | |
1348 | kvm_arch_ops->set_rflags(vcpu, emulate_ctxt.eflags); | |
1349 | ||
02c83209 AK |
1350 | if (vcpu->mmio_is_write) { |
1351 | vcpu->mmio_needed = 0; | |
6aa8b732 | 1352 | return EMULATE_DO_MMIO; |
02c83209 | 1353 | } |
6aa8b732 AK |
1354 | |
1355 | return EMULATE_DONE; | |
1356 | } | |
1357 | EXPORT_SYMBOL_GPL(emulate_instruction); | |
1358 | ||
b6958ce4 ED |
1359 | /* |
1360 | * The vCPU has executed a HLT instruction with in-kernel mode enabled. | |
1361 | */ | |
1362 | static void kvm_vcpu_kernel_halt(struct kvm_vcpu *vcpu) | |
d3bef15f | 1363 | { |
b6958ce4 ED |
1364 | DECLARE_WAITQUEUE(wait, current); |
1365 | ||
1366 | add_wait_queue(&vcpu->wq, &wait); | |
1367 | ||
1368 | /* | |
1369 | * We will block until either an interrupt or a signal wakes us up | |
1370 | */ | |
1371 | while(!(irqchip_in_kernel(vcpu->kvm) && kvm_cpu_has_interrupt(vcpu)) | |
1372 | && !vcpu->irq_summary | |
1373 | && !signal_pending(current)) { | |
1374 | set_current_state(TASK_INTERRUPTIBLE); | |
1375 | vcpu_put(vcpu); | |
1376 | schedule(); | |
1377 | vcpu_load(vcpu); | |
1378 | } | |
d3bef15f | 1379 | |
b6958ce4 ED |
1380 | remove_wait_queue(&vcpu->wq, &wait); |
1381 | set_current_state(TASK_RUNNING); | |
1382 | } | |
1383 | ||
1384 | int kvm_emulate_halt(struct kvm_vcpu *vcpu) | |
1385 | { | |
d3bef15f | 1386 | ++vcpu->stat.halt_exits; |
b6958ce4 ED |
1387 | if (irqchip_in_kernel(vcpu->kvm)) { |
1388 | kvm_vcpu_kernel_halt(vcpu); | |
1389 | return 1; | |
1390 | } else { | |
1391 | vcpu->run->exit_reason = KVM_EXIT_HLT; | |
1392 | return 0; | |
1393 | } | |
d3bef15f AK |
1394 | } |
1395 | EXPORT_SYMBOL_GPL(kvm_emulate_halt); | |
1396 | ||
270fd9b9 AK |
1397 | int kvm_hypercall(struct kvm_vcpu *vcpu, struct kvm_run *run) |
1398 | { | |
1399 | unsigned long nr, a0, a1, a2, a3, a4, a5, ret; | |
1400 | ||
9b22bf57 | 1401 | kvm_arch_ops->cache_regs(vcpu); |
270fd9b9 AK |
1402 | ret = -KVM_EINVAL; |
1403 | #ifdef CONFIG_X86_64 | |
1404 | if (is_long_mode(vcpu)) { | |
1405 | nr = vcpu->regs[VCPU_REGS_RAX]; | |
1406 | a0 = vcpu->regs[VCPU_REGS_RDI]; | |
1407 | a1 = vcpu->regs[VCPU_REGS_RSI]; | |
1408 | a2 = vcpu->regs[VCPU_REGS_RDX]; | |
1409 | a3 = vcpu->regs[VCPU_REGS_RCX]; | |
1410 | a4 = vcpu->regs[VCPU_REGS_R8]; | |
1411 | a5 = vcpu->regs[VCPU_REGS_R9]; | |
1412 | } else | |
1413 | #endif | |
1414 | { | |
1415 | nr = vcpu->regs[VCPU_REGS_RBX] & -1u; | |
1416 | a0 = vcpu->regs[VCPU_REGS_RAX] & -1u; | |
1417 | a1 = vcpu->regs[VCPU_REGS_RCX] & -1u; | |
1418 | a2 = vcpu->regs[VCPU_REGS_RDX] & -1u; | |
1419 | a3 = vcpu->regs[VCPU_REGS_RSI] & -1u; | |
1420 | a4 = vcpu->regs[VCPU_REGS_RDI] & -1u; | |
1421 | a5 = vcpu->regs[VCPU_REGS_RBP] & -1u; | |
1422 | } | |
1423 | switch (nr) { | |
1424 | default: | |
519ef353 | 1425 | run->hypercall.nr = nr; |
b4e63f56 AK |
1426 | run->hypercall.args[0] = a0; |
1427 | run->hypercall.args[1] = a1; | |
1428 | run->hypercall.args[2] = a2; | |
1429 | run->hypercall.args[3] = a3; | |
1430 | run->hypercall.args[4] = a4; | |
1431 | run->hypercall.args[5] = a5; | |
1432 | run->hypercall.ret = ret; | |
1433 | run->hypercall.longmode = is_long_mode(vcpu); | |
1434 | kvm_arch_ops->decache_regs(vcpu); | |
1435 | return 0; | |
270fd9b9 AK |
1436 | } |
1437 | vcpu->regs[VCPU_REGS_RAX] = ret; | |
9b22bf57 | 1438 | kvm_arch_ops->decache_regs(vcpu); |
270fd9b9 AK |
1439 | return 1; |
1440 | } | |
1441 | EXPORT_SYMBOL_GPL(kvm_hypercall); | |
1442 | ||
6aa8b732 AK |
1443 | static u64 mk_cr_64(u64 curr_cr, u32 new_val) |
1444 | { | |
1445 | return (curr_cr & ~((1ULL << 32) - 1)) | new_val; | |
1446 | } | |
1447 | ||
1448 | void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
1449 | { | |
1450 | struct descriptor_table dt = { limit, base }; | |
1451 | ||
1452 | kvm_arch_ops->set_gdt(vcpu, &dt); | |
1453 | } | |
1454 | ||
1455 | void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base) | |
1456 | { | |
1457 | struct descriptor_table dt = { limit, base }; | |
1458 | ||
1459 | kvm_arch_ops->set_idt(vcpu, &dt); | |
1460 | } | |
1461 | ||
1462 | void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw, | |
1463 | unsigned long *rflags) | |
1464 | { | |
1465 | lmsw(vcpu, msw); | |
1466 | *rflags = kvm_arch_ops->get_rflags(vcpu); | |
1467 | } | |
1468 | ||
1469 | unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr) | |
1470 | { | |
25c4c276 | 1471 | kvm_arch_ops->decache_cr4_guest_bits(vcpu); |
6aa8b732 AK |
1472 | switch (cr) { |
1473 | case 0: | |
1474 | return vcpu->cr0; | |
1475 | case 2: | |
1476 | return vcpu->cr2; | |
1477 | case 3: | |
1478 | return vcpu->cr3; | |
1479 | case 4: | |
1480 | return vcpu->cr4; | |
1481 | default: | |
1482 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr); | |
1483 | return 0; | |
1484 | } | |
1485 | } | |
1486 | ||
1487 | void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val, | |
1488 | unsigned long *rflags) | |
1489 | { | |
1490 | switch (cr) { | |
1491 | case 0: | |
1492 | set_cr0(vcpu, mk_cr_64(vcpu->cr0, val)); | |
1493 | *rflags = kvm_arch_ops->get_rflags(vcpu); | |
1494 | break; | |
1495 | case 2: | |
1496 | vcpu->cr2 = val; | |
1497 | break; | |
1498 | case 3: | |
1499 | set_cr3(vcpu, val); | |
1500 | break; | |
1501 | case 4: | |
1502 | set_cr4(vcpu, mk_cr_64(vcpu->cr4, val)); | |
1503 | break; | |
1504 | default: | |
1505 | vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr); | |
1506 | } | |
1507 | } | |
1508 | ||
102d8325 IM |
1509 | /* |
1510 | * Register the para guest with the host: | |
1511 | */ | |
1512 | static int vcpu_register_para(struct kvm_vcpu *vcpu, gpa_t para_state_gpa) | |
1513 | { | |
1514 | struct kvm_vcpu_para_state *para_state; | |
1515 | hpa_t para_state_hpa, hypercall_hpa; | |
1516 | struct page *para_state_page; | |
1517 | unsigned char *hypercall; | |
1518 | gpa_t hypercall_gpa; | |
1519 | ||
1520 | printk(KERN_DEBUG "kvm: guest trying to enter paravirtual mode\n"); | |
1521 | printk(KERN_DEBUG ".... para_state_gpa: %08Lx\n", para_state_gpa); | |
1522 | ||
1523 | /* | |
1524 | * Needs to be page aligned: | |
1525 | */ | |
1526 | if (para_state_gpa != PAGE_ALIGN(para_state_gpa)) | |
1527 | goto err_gp; | |
1528 | ||
1529 | para_state_hpa = gpa_to_hpa(vcpu, para_state_gpa); | |
1530 | printk(KERN_DEBUG ".... para_state_hpa: %08Lx\n", para_state_hpa); | |
1531 | if (is_error_hpa(para_state_hpa)) | |
1532 | goto err_gp; | |
1533 | ||
ab51a434 | 1534 | mark_page_dirty(vcpu->kvm, para_state_gpa >> PAGE_SHIFT); |
102d8325 | 1535 | para_state_page = pfn_to_page(para_state_hpa >> PAGE_SHIFT); |
fe551881 | 1536 | para_state = kmap(para_state_page); |
102d8325 IM |
1537 | |
1538 | printk(KERN_DEBUG ".... guest version: %d\n", para_state->guest_version); | |
1539 | printk(KERN_DEBUG ".... size: %d\n", para_state->size); | |
1540 | ||
1541 | para_state->host_version = KVM_PARA_API_VERSION; | |
1542 | /* | |
1543 | * We cannot support guests that try to register themselves | |
1544 | * with a newer API version than the host supports: | |
1545 | */ | |
1546 | if (para_state->guest_version > KVM_PARA_API_VERSION) { | |
1547 | para_state->ret = -KVM_EINVAL; | |
1548 | goto err_kunmap_skip; | |
1549 | } | |
1550 | ||
1551 | hypercall_gpa = para_state->hypercall_gpa; | |
1552 | hypercall_hpa = gpa_to_hpa(vcpu, hypercall_gpa); | |
1553 | printk(KERN_DEBUG ".... hypercall_hpa: %08Lx\n", hypercall_hpa); | |
1554 | if (is_error_hpa(hypercall_hpa)) { | |
1555 | para_state->ret = -KVM_EINVAL; | |
1556 | goto err_kunmap_skip; | |
1557 | } | |
1558 | ||
1559 | printk(KERN_DEBUG "kvm: para guest successfully registered.\n"); | |
1560 | vcpu->para_state_page = para_state_page; | |
1561 | vcpu->para_state_gpa = para_state_gpa; | |
1562 | vcpu->hypercall_gpa = hypercall_gpa; | |
1563 | ||
ab51a434 | 1564 | mark_page_dirty(vcpu->kvm, hypercall_gpa >> PAGE_SHIFT); |
102d8325 IM |
1565 | hypercall = kmap_atomic(pfn_to_page(hypercall_hpa >> PAGE_SHIFT), |
1566 | KM_USER1) + (hypercall_hpa & ~PAGE_MASK); | |
1567 | kvm_arch_ops->patch_hypercall(vcpu, hypercall); | |
1568 | kunmap_atomic(hypercall, KM_USER1); | |
1569 | ||
1570 | para_state->ret = 0; | |
1571 | err_kunmap_skip: | |
fe551881 | 1572 | kunmap(para_state_page); |
102d8325 IM |
1573 | return 0; |
1574 | err_gp: | |
1575 | return 1; | |
1576 | } | |
1577 | ||
3bab1f5d AK |
1578 | int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata) |
1579 | { | |
1580 | u64 data; | |
1581 | ||
1582 | switch (msr) { | |
1583 | case 0xc0010010: /* SYSCFG */ | |
1584 | case 0xc0010015: /* HWCR */ | |
1585 | case MSR_IA32_PLATFORM_ID: | |
1586 | case MSR_IA32_P5_MC_ADDR: | |
1587 | case MSR_IA32_P5_MC_TYPE: | |
1588 | case MSR_IA32_MC0_CTL: | |
1589 | case MSR_IA32_MCG_STATUS: | |
1590 | case MSR_IA32_MCG_CAP: | |
1591 | case MSR_IA32_MC0_MISC: | |
1592 | case MSR_IA32_MC0_MISC+4: | |
1593 | case MSR_IA32_MC0_MISC+8: | |
1594 | case MSR_IA32_MC0_MISC+12: | |
1595 | case MSR_IA32_MC0_MISC+16: | |
1596 | case MSR_IA32_UCODE_REV: | |
a8d13ea2 | 1597 | case MSR_IA32_PERF_STATUS: |
2dc7094b | 1598 | case MSR_IA32_EBL_CR_POWERON: |
3bab1f5d AK |
1599 | /* MTRR registers */ |
1600 | case 0xfe: | |
1601 | case 0x200 ... 0x2ff: | |
1602 | data = 0; | |
1603 | break; | |
a8d13ea2 AK |
1604 | case 0xcd: /* fsb frequency */ |
1605 | data = 3; | |
1606 | break; | |
3bab1f5d | 1607 | case MSR_IA32_APICBASE: |
7017fc3d | 1608 | data = kvm_get_apic_base(vcpu); |
3bab1f5d | 1609 | break; |
6f00e68f AK |
1610 | case MSR_IA32_MISC_ENABLE: |
1611 | data = vcpu->ia32_misc_enable_msr; | |
1612 | break; | |
3bab1f5d AK |
1613 | #ifdef CONFIG_X86_64 |
1614 | case MSR_EFER: | |
1615 | data = vcpu->shadow_efer; | |
1616 | break; | |
1617 | #endif | |
1618 | default: | |
f0242478 | 1619 | pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr); |
3bab1f5d AK |
1620 | return 1; |
1621 | } | |
1622 | *pdata = data; | |
1623 | return 0; | |
1624 | } | |
1625 | EXPORT_SYMBOL_GPL(kvm_get_msr_common); | |
1626 | ||
6aa8b732 AK |
1627 | /* |
1628 | * Reads an msr value (of 'msr_index') into 'pdata'. | |
1629 | * Returns 0 on success, non-0 otherwise. | |
1630 | * Assumes vcpu_load() was already called. | |
1631 | */ | |
35f3f286 | 1632 | int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata) |
6aa8b732 AK |
1633 | { |
1634 | return kvm_arch_ops->get_msr(vcpu, msr_index, pdata); | |
1635 | } | |
1636 | ||
05b3e0c2 | 1637 | #ifdef CONFIG_X86_64 |
6aa8b732 | 1638 | |
3bab1f5d | 1639 | static void set_efer(struct kvm_vcpu *vcpu, u64 efer) |
6aa8b732 | 1640 | { |
6aa8b732 AK |
1641 | if (efer & EFER_RESERVED_BITS) { |
1642 | printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n", | |
1643 | efer); | |
1644 | inject_gp(vcpu); | |
1645 | return; | |
1646 | } | |
1647 | ||
1648 | if (is_paging(vcpu) | |
1649 | && (vcpu->shadow_efer & EFER_LME) != (efer & EFER_LME)) { | |
1650 | printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n"); | |
1651 | inject_gp(vcpu); | |
1652 | return; | |
1653 | } | |
1654 | ||
7725f0ba AK |
1655 | kvm_arch_ops->set_efer(vcpu, efer); |
1656 | ||
6aa8b732 AK |
1657 | efer &= ~EFER_LMA; |
1658 | efer |= vcpu->shadow_efer & EFER_LMA; | |
1659 | ||
1660 | vcpu->shadow_efer = efer; | |
6aa8b732 | 1661 | } |
6aa8b732 AK |
1662 | |
1663 | #endif | |
1664 | ||
3bab1f5d AK |
1665 | int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data) |
1666 | { | |
1667 | switch (msr) { | |
1668 | #ifdef CONFIG_X86_64 | |
1669 | case MSR_EFER: | |
1670 | set_efer(vcpu, data); | |
1671 | break; | |
1672 | #endif | |
1673 | case MSR_IA32_MC0_STATUS: | |
f0242478 | 1674 | pr_unimpl(vcpu, "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n", |
3bab1f5d AK |
1675 | __FUNCTION__, data); |
1676 | break; | |
0e5bf0d0 | 1677 | case MSR_IA32_MCG_STATUS: |
f0242478 | 1678 | pr_unimpl(vcpu, "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n", |
0e5bf0d0 SK |
1679 | __FUNCTION__, data); |
1680 | break; | |
3bab1f5d AK |
1681 | case MSR_IA32_UCODE_REV: |
1682 | case MSR_IA32_UCODE_WRITE: | |
1683 | case 0x200 ... 0x2ff: /* MTRRs */ | |
1684 | break; | |
1685 | case MSR_IA32_APICBASE: | |
7017fc3d | 1686 | kvm_set_apic_base(vcpu, data); |
3bab1f5d | 1687 | break; |
6f00e68f AK |
1688 | case MSR_IA32_MISC_ENABLE: |
1689 | vcpu->ia32_misc_enable_msr = data; | |
1690 | break; | |
102d8325 IM |
1691 | /* |
1692 | * This is the 'probe whether the host is KVM' logic: | |
1693 | */ | |
1694 | case MSR_KVM_API_MAGIC: | |
1695 | return vcpu_register_para(vcpu, data); | |
1696 | ||
3bab1f5d | 1697 | default: |
f0242478 | 1698 | pr_unimpl(vcpu, "unhandled wrmsr: 0x%x\n", msr); |
3bab1f5d AK |
1699 | return 1; |
1700 | } | |
1701 | return 0; | |
1702 | } | |
1703 | EXPORT_SYMBOL_GPL(kvm_set_msr_common); | |
1704 | ||
6aa8b732 AK |
1705 | /* |
1706 | * Writes msr value into into the appropriate "register". | |
1707 | * Returns 0 on success, non-0 otherwise. | |
1708 | * Assumes vcpu_load() was already called. | |
1709 | */ | |
35f3f286 | 1710 | int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) |
6aa8b732 AK |
1711 | { |
1712 | return kvm_arch_ops->set_msr(vcpu, msr_index, data); | |
1713 | } | |
1714 | ||
1715 | void kvm_resched(struct kvm_vcpu *vcpu) | |
1716 | { | |
3fca0365 YD |
1717 | if (!need_resched()) |
1718 | return; | |
6aa8b732 | 1719 | cond_resched(); |
6aa8b732 AK |
1720 | } |
1721 | EXPORT_SYMBOL_GPL(kvm_resched); | |
1722 | ||
06465c5a AK |
1723 | void kvm_emulate_cpuid(struct kvm_vcpu *vcpu) |
1724 | { | |
1725 | int i; | |
1726 | u32 function; | |
1727 | struct kvm_cpuid_entry *e, *best; | |
1728 | ||
1729 | kvm_arch_ops->cache_regs(vcpu); | |
1730 | function = vcpu->regs[VCPU_REGS_RAX]; | |
1731 | vcpu->regs[VCPU_REGS_RAX] = 0; | |
1732 | vcpu->regs[VCPU_REGS_RBX] = 0; | |
1733 | vcpu->regs[VCPU_REGS_RCX] = 0; | |
1734 | vcpu->regs[VCPU_REGS_RDX] = 0; | |
1735 | best = NULL; | |
1736 | for (i = 0; i < vcpu->cpuid_nent; ++i) { | |
1737 | e = &vcpu->cpuid_entries[i]; | |
1738 | if (e->function == function) { | |
1739 | best = e; | |
1740 | break; | |
1741 | } | |
1742 | /* | |
1743 | * Both basic or both extended? | |
1744 | */ | |
1745 | if (((e->function ^ function) & 0x80000000) == 0) | |
1746 | if (!best || e->function > best->function) | |
1747 | best = e; | |
1748 | } | |
1749 | if (best) { | |
1750 | vcpu->regs[VCPU_REGS_RAX] = best->eax; | |
1751 | vcpu->regs[VCPU_REGS_RBX] = best->ebx; | |
1752 | vcpu->regs[VCPU_REGS_RCX] = best->ecx; | |
1753 | vcpu->regs[VCPU_REGS_RDX] = best->edx; | |
1754 | } | |
1755 | kvm_arch_ops->decache_regs(vcpu); | |
1756 | kvm_arch_ops->skip_emulated_instruction(vcpu); | |
1757 | } | |
1758 | EXPORT_SYMBOL_GPL(kvm_emulate_cpuid); | |
1759 | ||
039576c0 | 1760 | static int pio_copy_data(struct kvm_vcpu *vcpu) |
46fc1477 | 1761 | { |
039576c0 AK |
1762 | void *p = vcpu->pio_data; |
1763 | void *q; | |
1764 | unsigned bytes; | |
1765 | int nr_pages = vcpu->pio.guest_pages[1] ? 2 : 1; | |
1766 | ||
039576c0 AK |
1767 | q = vmap(vcpu->pio.guest_pages, nr_pages, VM_READ|VM_WRITE, |
1768 | PAGE_KERNEL); | |
1769 | if (!q) { | |
039576c0 AK |
1770 | free_pio_guest_pages(vcpu); |
1771 | return -ENOMEM; | |
1772 | } | |
1773 | q += vcpu->pio.guest_page_offset; | |
1774 | bytes = vcpu->pio.size * vcpu->pio.cur_count; | |
1775 | if (vcpu->pio.in) | |
1776 | memcpy(q, p, bytes); | |
1777 | else | |
1778 | memcpy(p, q, bytes); | |
1779 | q -= vcpu->pio.guest_page_offset; | |
1780 | vunmap(q); | |
039576c0 AK |
1781 | free_pio_guest_pages(vcpu); |
1782 | return 0; | |
1783 | } | |
1784 | ||
1785 | static int complete_pio(struct kvm_vcpu *vcpu) | |
1786 | { | |
1787 | struct kvm_pio_request *io = &vcpu->pio; | |
46fc1477 | 1788 | long delta; |
039576c0 | 1789 | int r; |
46fc1477 AK |
1790 | |
1791 | kvm_arch_ops->cache_regs(vcpu); | |
1792 | ||
1793 | if (!io->string) { | |
039576c0 AK |
1794 | if (io->in) |
1795 | memcpy(&vcpu->regs[VCPU_REGS_RAX], vcpu->pio_data, | |
46fc1477 AK |
1796 | io->size); |
1797 | } else { | |
039576c0 AK |
1798 | if (io->in) { |
1799 | r = pio_copy_data(vcpu); | |
1800 | if (r) { | |
1801 | kvm_arch_ops->cache_regs(vcpu); | |
1802 | return r; | |
1803 | } | |
1804 | } | |
1805 | ||
46fc1477 AK |
1806 | delta = 1; |
1807 | if (io->rep) { | |
039576c0 | 1808 | delta *= io->cur_count; |
46fc1477 AK |
1809 | /* |
1810 | * The size of the register should really depend on | |
1811 | * current address size. | |
1812 | */ | |
1813 | vcpu->regs[VCPU_REGS_RCX] -= delta; | |
1814 | } | |
039576c0 | 1815 | if (io->down) |
46fc1477 AK |
1816 | delta = -delta; |
1817 | delta *= io->size; | |
039576c0 | 1818 | if (io->in) |
46fc1477 AK |
1819 | vcpu->regs[VCPU_REGS_RDI] += delta; |
1820 | else | |
1821 | vcpu->regs[VCPU_REGS_RSI] += delta; | |
1822 | } | |
1823 | ||
46fc1477 AK |
1824 | kvm_arch_ops->decache_regs(vcpu); |
1825 | ||
039576c0 AK |
1826 | io->count -= io->cur_count; |
1827 | io->cur_count = 0; | |
1828 | ||
1829 | if (!io->count) | |
1830 | kvm_arch_ops->skip_emulated_instruction(vcpu); | |
1831 | return 0; | |
46fc1477 AK |
1832 | } |
1833 | ||
65619eb5 ED |
1834 | static void kernel_pio(struct kvm_io_device *pio_dev, |
1835 | struct kvm_vcpu *vcpu, | |
1836 | void *pd) | |
74906345 ED |
1837 | { |
1838 | /* TODO: String I/O for in kernel device */ | |
1839 | ||
9cf98828 | 1840 | mutex_lock(&vcpu->kvm->lock); |
74906345 ED |
1841 | if (vcpu->pio.in) |
1842 | kvm_iodevice_read(pio_dev, vcpu->pio.port, | |
1843 | vcpu->pio.size, | |
65619eb5 | 1844 | pd); |
74906345 ED |
1845 | else |
1846 | kvm_iodevice_write(pio_dev, vcpu->pio.port, | |
1847 | vcpu->pio.size, | |
65619eb5 | 1848 | pd); |
9cf98828 | 1849 | mutex_unlock(&vcpu->kvm->lock); |
65619eb5 ED |
1850 | } |
1851 | ||
1852 | static void pio_string_write(struct kvm_io_device *pio_dev, | |
1853 | struct kvm_vcpu *vcpu) | |
1854 | { | |
1855 | struct kvm_pio_request *io = &vcpu->pio; | |
1856 | void *pd = vcpu->pio_data; | |
1857 | int i; | |
1858 | ||
9cf98828 | 1859 | mutex_lock(&vcpu->kvm->lock); |
65619eb5 ED |
1860 | for (i = 0; i < io->cur_count; i++) { |
1861 | kvm_iodevice_write(pio_dev, io->port, | |
1862 | io->size, | |
1863 | pd); | |
1864 | pd += io->size; | |
1865 | } | |
9cf98828 | 1866 | mutex_unlock(&vcpu->kvm->lock); |
74906345 ED |
1867 | } |
1868 | ||
3090dd73 LV |
1869 | int kvm_emulate_pio (struct kvm_vcpu *vcpu, struct kvm_run *run, int in, |
1870 | int size, unsigned port) | |
1871 | { | |
1872 | struct kvm_io_device *pio_dev; | |
1873 | ||
1874 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
1875 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; | |
1876 | vcpu->run->io.size = vcpu->pio.size = size; | |
1877 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; | |
1878 | vcpu->run->io.count = vcpu->pio.count = vcpu->pio.cur_count = 1; | |
1879 | vcpu->run->io.port = vcpu->pio.port = port; | |
1880 | vcpu->pio.in = in; | |
1881 | vcpu->pio.string = 0; | |
1882 | vcpu->pio.down = 0; | |
1883 | vcpu->pio.guest_page_offset = 0; | |
1884 | vcpu->pio.rep = 0; | |
1885 | ||
1886 | kvm_arch_ops->cache_regs(vcpu); | |
1887 | memcpy(vcpu->pio_data, &vcpu->regs[VCPU_REGS_RAX], 4); | |
1888 | kvm_arch_ops->decache_regs(vcpu); | |
1889 | ||
1890 | pio_dev = vcpu_find_pio_dev(vcpu, port); | |
1891 | if (pio_dev) { | |
1892 | kernel_pio(pio_dev, vcpu, vcpu->pio_data); | |
1893 | complete_pio(vcpu); | |
1894 | return 1; | |
1895 | } | |
1896 | return 0; | |
1897 | } | |
1898 | EXPORT_SYMBOL_GPL(kvm_emulate_pio); | |
1899 | ||
1900 | int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in, | |
1901 | int size, unsigned long count, int down, | |
039576c0 AK |
1902 | gva_t address, int rep, unsigned port) |
1903 | { | |
1904 | unsigned now, in_page; | |
65619eb5 | 1905 | int i, ret = 0; |
039576c0 AK |
1906 | int nr_pages = 1; |
1907 | struct page *page; | |
74906345 | 1908 | struct kvm_io_device *pio_dev; |
039576c0 AK |
1909 | |
1910 | vcpu->run->exit_reason = KVM_EXIT_IO; | |
1911 | vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT; | |
3090dd73 | 1912 | vcpu->run->io.size = vcpu->pio.size = size; |
039576c0 | 1913 | vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE; |
3090dd73 LV |
1914 | vcpu->run->io.count = vcpu->pio.count = vcpu->pio.cur_count = count; |
1915 | vcpu->run->io.port = vcpu->pio.port = port; | |
039576c0 | 1916 | vcpu->pio.in = in; |
3090dd73 | 1917 | vcpu->pio.string = 1; |
039576c0 AK |
1918 | vcpu->pio.down = down; |
1919 | vcpu->pio.guest_page_offset = offset_in_page(address); | |
1920 | vcpu->pio.rep = rep; | |
1921 | ||
039576c0 AK |
1922 | if (!count) { |
1923 | kvm_arch_ops->skip_emulated_instruction(vcpu); | |
1924 | return 1; | |
1925 | } | |
1926 | ||
039576c0 AK |
1927 | if (!down) |
1928 | in_page = PAGE_SIZE - offset_in_page(address); | |
1929 | else | |
1930 | in_page = offset_in_page(address) + size; | |
1931 | now = min(count, (unsigned long)in_page / size); | |
1932 | if (!now) { | |
1933 | /* | |
1934 | * String I/O straddles page boundary. Pin two guest pages | |
1935 | * so that we satisfy atomicity constraints. Do just one | |
1936 | * transaction to avoid complexity. | |
1937 | */ | |
1938 | nr_pages = 2; | |
1939 | now = 1; | |
1940 | } | |
1941 | if (down) { | |
1942 | /* | |
1943 | * String I/O in reverse. Yuck. Kill the guest, fix later. | |
1944 | */ | |
f0242478 | 1945 | pr_unimpl(vcpu, "guest string pio down\n"); |
039576c0 AK |
1946 | inject_gp(vcpu); |
1947 | return 1; | |
1948 | } | |
1949 | vcpu->run->io.count = now; | |
1950 | vcpu->pio.cur_count = now; | |
1951 | ||
1952 | for (i = 0; i < nr_pages; ++i) { | |
11ec2804 | 1953 | mutex_lock(&vcpu->kvm->lock); |
039576c0 AK |
1954 | page = gva_to_page(vcpu, address + i * PAGE_SIZE); |
1955 | if (page) | |
1956 | get_page(page); | |
1957 | vcpu->pio.guest_pages[i] = page; | |
11ec2804 | 1958 | mutex_unlock(&vcpu->kvm->lock); |
039576c0 AK |
1959 | if (!page) { |
1960 | inject_gp(vcpu); | |
1961 | free_pio_guest_pages(vcpu); | |
1962 | return 1; | |
1963 | } | |
1964 | } | |
1965 | ||
3090dd73 | 1966 | pio_dev = vcpu_find_pio_dev(vcpu, port); |
65619eb5 ED |
1967 | if (!vcpu->pio.in) { |
1968 | /* string PIO write */ | |
1969 | ret = pio_copy_data(vcpu); | |
1970 | if (ret >= 0 && pio_dev) { | |
1971 | pio_string_write(pio_dev, vcpu); | |
1972 | complete_pio(vcpu); | |
1973 | if (vcpu->pio.count == 0) | |
1974 | ret = 1; | |
1975 | } | |
1976 | } else if (pio_dev) | |
f0242478 | 1977 | pr_unimpl(vcpu, "no string pio read support yet, " |
65619eb5 ED |
1978 | "port %x size %d count %ld\n", |
1979 | port, size, count); | |
1980 | ||
1981 | return ret; | |
039576c0 | 1982 | } |
3090dd73 | 1983 | EXPORT_SYMBOL_GPL(kvm_emulate_pio_string); |
039576c0 | 1984 | |
bccf2150 | 1985 | static int kvm_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) |
6aa8b732 | 1986 | { |
6aa8b732 | 1987 | int r; |
1961d276 | 1988 | sigset_t sigsaved; |
6aa8b732 | 1989 | |
bccf2150 | 1990 | vcpu_load(vcpu); |
6aa8b732 | 1991 | |
1961d276 AK |
1992 | if (vcpu->sigset_active) |
1993 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); | |
1994 | ||
54810342 | 1995 | /* re-sync apic's tpr */ |
7017fc3d | 1996 | set_cr8(vcpu, kvm_run->cr8); |
54810342 | 1997 | |
02c83209 AK |
1998 | if (vcpu->pio.cur_count) { |
1999 | r = complete_pio(vcpu); | |
2000 | if (r) | |
2001 | goto out; | |
2002 | } | |
2003 | ||
2004 | if (vcpu->mmio_needed) { | |
2005 | memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8); | |
2006 | vcpu->mmio_read_completed = 1; | |
2007 | vcpu->mmio_needed = 0; | |
2008 | r = emulate_instruction(vcpu, kvm_run, | |
2009 | vcpu->mmio_fault_cr2, 0); | |
2010 | if (r == EMULATE_DO_MMIO) { | |
2011 | /* | |
2012 | * Read-modify-write. Back to userspace. | |
2013 | */ | |
02c83209 AK |
2014 | r = 0; |
2015 | goto out; | |
46fc1477 | 2016 | } |
6aa8b732 AK |
2017 | } |
2018 | ||
8eb7d334 | 2019 | if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) { |
b4e63f56 AK |
2020 | kvm_arch_ops->cache_regs(vcpu); |
2021 | vcpu->regs[VCPU_REGS_RAX] = kvm_run->hypercall.ret; | |
2022 | kvm_arch_ops->decache_regs(vcpu); | |
2023 | } | |
2024 | ||
6aa8b732 AK |
2025 | r = kvm_arch_ops->run(vcpu, kvm_run); |
2026 | ||
039576c0 | 2027 | out: |
1961d276 AK |
2028 | if (vcpu->sigset_active) |
2029 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); | |
2030 | ||
6aa8b732 AK |
2031 | vcpu_put(vcpu); |
2032 | return r; | |
2033 | } | |
2034 | ||
bccf2150 AK |
2035 | static int kvm_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, |
2036 | struct kvm_regs *regs) | |
6aa8b732 | 2037 | { |
bccf2150 | 2038 | vcpu_load(vcpu); |
6aa8b732 AK |
2039 | |
2040 | kvm_arch_ops->cache_regs(vcpu); | |
2041 | ||
2042 | regs->rax = vcpu->regs[VCPU_REGS_RAX]; | |
2043 | regs->rbx = vcpu->regs[VCPU_REGS_RBX]; | |
2044 | regs->rcx = vcpu->regs[VCPU_REGS_RCX]; | |
2045 | regs->rdx = vcpu->regs[VCPU_REGS_RDX]; | |
2046 | regs->rsi = vcpu->regs[VCPU_REGS_RSI]; | |
2047 | regs->rdi = vcpu->regs[VCPU_REGS_RDI]; | |
2048 | regs->rsp = vcpu->regs[VCPU_REGS_RSP]; | |
2049 | regs->rbp = vcpu->regs[VCPU_REGS_RBP]; | |
05b3e0c2 | 2050 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
2051 | regs->r8 = vcpu->regs[VCPU_REGS_R8]; |
2052 | regs->r9 = vcpu->regs[VCPU_REGS_R9]; | |
2053 | regs->r10 = vcpu->regs[VCPU_REGS_R10]; | |
2054 | regs->r11 = vcpu->regs[VCPU_REGS_R11]; | |
2055 | regs->r12 = vcpu->regs[VCPU_REGS_R12]; | |
2056 | regs->r13 = vcpu->regs[VCPU_REGS_R13]; | |
2057 | regs->r14 = vcpu->regs[VCPU_REGS_R14]; | |
2058 | regs->r15 = vcpu->regs[VCPU_REGS_R15]; | |
2059 | #endif | |
2060 | ||
2061 | regs->rip = vcpu->rip; | |
2062 | regs->rflags = kvm_arch_ops->get_rflags(vcpu); | |
2063 | ||
2064 | /* | |
2065 | * Don't leak debug flags in case they were set for guest debugging | |
2066 | */ | |
2067 | if (vcpu->guest_debug.enabled && vcpu->guest_debug.singlestep) | |
2068 | regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF); | |
2069 | ||
2070 | vcpu_put(vcpu); | |
2071 | ||
2072 | return 0; | |
2073 | } | |
2074 | ||
bccf2150 AK |
2075 | static int kvm_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, |
2076 | struct kvm_regs *regs) | |
6aa8b732 | 2077 | { |
bccf2150 | 2078 | vcpu_load(vcpu); |
6aa8b732 AK |
2079 | |
2080 | vcpu->regs[VCPU_REGS_RAX] = regs->rax; | |
2081 | vcpu->regs[VCPU_REGS_RBX] = regs->rbx; | |
2082 | vcpu->regs[VCPU_REGS_RCX] = regs->rcx; | |
2083 | vcpu->regs[VCPU_REGS_RDX] = regs->rdx; | |
2084 | vcpu->regs[VCPU_REGS_RSI] = regs->rsi; | |
2085 | vcpu->regs[VCPU_REGS_RDI] = regs->rdi; | |
2086 | vcpu->regs[VCPU_REGS_RSP] = regs->rsp; | |
2087 | vcpu->regs[VCPU_REGS_RBP] = regs->rbp; | |
05b3e0c2 | 2088 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
2089 | vcpu->regs[VCPU_REGS_R8] = regs->r8; |
2090 | vcpu->regs[VCPU_REGS_R9] = regs->r9; | |
2091 | vcpu->regs[VCPU_REGS_R10] = regs->r10; | |
2092 | vcpu->regs[VCPU_REGS_R11] = regs->r11; | |
2093 | vcpu->regs[VCPU_REGS_R12] = regs->r12; | |
2094 | vcpu->regs[VCPU_REGS_R13] = regs->r13; | |
2095 | vcpu->regs[VCPU_REGS_R14] = regs->r14; | |
2096 | vcpu->regs[VCPU_REGS_R15] = regs->r15; | |
2097 | #endif | |
2098 | ||
2099 | vcpu->rip = regs->rip; | |
2100 | kvm_arch_ops->set_rflags(vcpu, regs->rflags); | |
2101 | ||
2102 | kvm_arch_ops->decache_regs(vcpu); | |
2103 | ||
2104 | vcpu_put(vcpu); | |
2105 | ||
2106 | return 0; | |
2107 | } | |
2108 | ||
2109 | static void get_segment(struct kvm_vcpu *vcpu, | |
2110 | struct kvm_segment *var, int seg) | |
2111 | { | |
2112 | return kvm_arch_ops->get_segment(vcpu, var, seg); | |
2113 | } | |
2114 | ||
bccf2150 AK |
2115 | static int kvm_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu, |
2116 | struct kvm_sregs *sregs) | |
6aa8b732 | 2117 | { |
6aa8b732 AK |
2118 | struct descriptor_table dt; |
2119 | ||
bccf2150 | 2120 | vcpu_load(vcpu); |
6aa8b732 AK |
2121 | |
2122 | get_segment(vcpu, &sregs->cs, VCPU_SREG_CS); | |
2123 | get_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
2124 | get_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
2125 | get_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
2126 | get_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
2127 | get_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
2128 | ||
2129 | get_segment(vcpu, &sregs->tr, VCPU_SREG_TR); | |
2130 | get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
2131 | ||
2132 | kvm_arch_ops->get_idt(vcpu, &dt); | |
2133 | sregs->idt.limit = dt.limit; | |
2134 | sregs->idt.base = dt.base; | |
2135 | kvm_arch_ops->get_gdt(vcpu, &dt); | |
2136 | sregs->gdt.limit = dt.limit; | |
2137 | sregs->gdt.base = dt.base; | |
2138 | ||
25c4c276 | 2139 | kvm_arch_ops->decache_cr4_guest_bits(vcpu); |
6aa8b732 AK |
2140 | sregs->cr0 = vcpu->cr0; |
2141 | sregs->cr2 = vcpu->cr2; | |
2142 | sregs->cr3 = vcpu->cr3; | |
2143 | sregs->cr4 = vcpu->cr4; | |
7017fc3d | 2144 | sregs->cr8 = get_cr8(vcpu); |
6aa8b732 | 2145 | sregs->efer = vcpu->shadow_efer; |
7017fc3d | 2146 | sregs->apic_base = kvm_get_apic_base(vcpu); |
6aa8b732 AK |
2147 | |
2148 | memcpy(sregs->interrupt_bitmap, vcpu->irq_pending, | |
2149 | sizeof sregs->interrupt_bitmap); | |
2150 | ||
2151 | vcpu_put(vcpu); | |
2152 | ||
2153 | return 0; | |
2154 | } | |
2155 | ||
2156 | static void set_segment(struct kvm_vcpu *vcpu, | |
2157 | struct kvm_segment *var, int seg) | |
2158 | { | |
2159 | return kvm_arch_ops->set_segment(vcpu, var, seg); | |
2160 | } | |
2161 | ||
bccf2150 AK |
2162 | static int kvm_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, |
2163 | struct kvm_sregs *sregs) | |
6aa8b732 | 2164 | { |
6aa8b732 AK |
2165 | int mmu_reset_needed = 0; |
2166 | int i; | |
2167 | struct descriptor_table dt; | |
2168 | ||
bccf2150 | 2169 | vcpu_load(vcpu); |
6aa8b732 | 2170 | |
6aa8b732 AK |
2171 | dt.limit = sregs->idt.limit; |
2172 | dt.base = sregs->idt.base; | |
2173 | kvm_arch_ops->set_idt(vcpu, &dt); | |
2174 | dt.limit = sregs->gdt.limit; | |
2175 | dt.base = sregs->gdt.base; | |
2176 | kvm_arch_ops->set_gdt(vcpu, &dt); | |
2177 | ||
2178 | vcpu->cr2 = sregs->cr2; | |
2179 | mmu_reset_needed |= vcpu->cr3 != sregs->cr3; | |
2180 | vcpu->cr3 = sregs->cr3; | |
2181 | ||
7017fc3d | 2182 | set_cr8(vcpu, sregs->cr8); |
6aa8b732 AK |
2183 | |
2184 | mmu_reset_needed |= vcpu->shadow_efer != sregs->efer; | |
05b3e0c2 | 2185 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
2186 | kvm_arch_ops->set_efer(vcpu, sregs->efer); |
2187 | #endif | |
7017fc3d | 2188 | kvm_set_apic_base(vcpu, sregs->apic_base); |
6aa8b732 | 2189 | |
25c4c276 | 2190 | kvm_arch_ops->decache_cr4_guest_bits(vcpu); |
399badf3 | 2191 | |
6aa8b732 | 2192 | mmu_reset_needed |= vcpu->cr0 != sregs->cr0; |
f6528b03 | 2193 | kvm_arch_ops->set_cr0(vcpu, sregs->cr0); |
6aa8b732 AK |
2194 | |
2195 | mmu_reset_needed |= vcpu->cr4 != sregs->cr4; | |
2196 | kvm_arch_ops->set_cr4(vcpu, sregs->cr4); | |
1b0973bd AK |
2197 | if (!is_long_mode(vcpu) && is_pae(vcpu)) |
2198 | load_pdptrs(vcpu, vcpu->cr3); | |
6aa8b732 AK |
2199 | |
2200 | if (mmu_reset_needed) | |
2201 | kvm_mmu_reset_context(vcpu); | |
2202 | ||
2203 | memcpy(vcpu->irq_pending, sregs->interrupt_bitmap, | |
2204 | sizeof vcpu->irq_pending); | |
2205 | vcpu->irq_summary = 0; | |
9eb829ce | 2206 | for (i = 0; i < ARRAY_SIZE(vcpu->irq_pending); ++i) |
6aa8b732 AK |
2207 | if (vcpu->irq_pending[i]) |
2208 | __set_bit(i, &vcpu->irq_summary); | |
2209 | ||
024aa1c0 AK |
2210 | set_segment(vcpu, &sregs->cs, VCPU_SREG_CS); |
2211 | set_segment(vcpu, &sregs->ds, VCPU_SREG_DS); | |
2212 | set_segment(vcpu, &sregs->es, VCPU_SREG_ES); | |
2213 | set_segment(vcpu, &sregs->fs, VCPU_SREG_FS); | |
2214 | set_segment(vcpu, &sregs->gs, VCPU_SREG_GS); | |
2215 | set_segment(vcpu, &sregs->ss, VCPU_SREG_SS); | |
2216 | ||
2217 | set_segment(vcpu, &sregs->tr, VCPU_SREG_TR); | |
2218 | set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); | |
2219 | ||
6aa8b732 AK |
2220 | vcpu_put(vcpu); |
2221 | ||
2222 | return 0; | |
2223 | } | |
2224 | ||
2225 | /* | |
2226 | * List of msr numbers which we expose to userspace through KVM_GET_MSRS | |
2227 | * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST. | |
bf591b24 MR |
2228 | * |
2229 | * This list is modified at module load time to reflect the | |
2230 | * capabilities of the host cpu. | |
6aa8b732 AK |
2231 | */ |
2232 | static u32 msrs_to_save[] = { | |
2233 | MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP, | |
2234 | MSR_K6_STAR, | |
05b3e0c2 | 2235 | #ifdef CONFIG_X86_64 |
6aa8b732 AK |
2236 | MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR, |
2237 | #endif | |
2238 | MSR_IA32_TIME_STAMP_COUNTER, | |
2239 | }; | |
2240 | ||
bf591b24 MR |
2241 | static unsigned num_msrs_to_save; |
2242 | ||
6f00e68f AK |
2243 | static u32 emulated_msrs[] = { |
2244 | MSR_IA32_MISC_ENABLE, | |
2245 | }; | |
2246 | ||
bf591b24 MR |
2247 | static __init void kvm_init_msr_list(void) |
2248 | { | |
2249 | u32 dummy[2]; | |
2250 | unsigned i, j; | |
2251 | ||
2252 | for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) { | |
2253 | if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0) | |
2254 | continue; | |
2255 | if (j < i) | |
2256 | msrs_to_save[j] = msrs_to_save[i]; | |
2257 | j++; | |
2258 | } | |
2259 | num_msrs_to_save = j; | |
2260 | } | |
6aa8b732 AK |
2261 | |
2262 | /* | |
2263 | * Adapt set_msr() to msr_io()'s calling convention | |
2264 | */ | |
2265 | static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data) | |
2266 | { | |
35f3f286 | 2267 | return kvm_set_msr(vcpu, index, *data); |
6aa8b732 AK |
2268 | } |
2269 | ||
2270 | /* | |
2271 | * Read or write a bunch of msrs. All parameters are kernel addresses. | |
2272 | * | |
2273 | * @return number of msrs set successfully. | |
2274 | */ | |
bccf2150 | 2275 | static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs, |
6aa8b732 AK |
2276 | struct kvm_msr_entry *entries, |
2277 | int (*do_msr)(struct kvm_vcpu *vcpu, | |
2278 | unsigned index, u64 *data)) | |
2279 | { | |
6aa8b732 AK |
2280 | int i; |
2281 | ||
bccf2150 | 2282 | vcpu_load(vcpu); |
6aa8b732 AK |
2283 | |
2284 | for (i = 0; i < msrs->nmsrs; ++i) | |
2285 | if (do_msr(vcpu, entries[i].index, &entries[i].data)) | |
2286 | break; | |
2287 | ||
2288 | vcpu_put(vcpu); | |
2289 | ||
2290 | return i; | |
2291 | } | |
2292 | ||
2293 | /* | |
2294 | * Read or write a bunch of msrs. Parameters are user addresses. | |
2295 | * | |
2296 | * @return number of msrs set successfully. | |
2297 | */ | |
bccf2150 | 2298 | static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs, |
6aa8b732 AK |
2299 | int (*do_msr)(struct kvm_vcpu *vcpu, |
2300 | unsigned index, u64 *data), | |
2301 | int writeback) | |
2302 | { | |
2303 | struct kvm_msrs msrs; | |
2304 | struct kvm_msr_entry *entries; | |
2305 | int r, n; | |
2306 | unsigned size; | |
2307 | ||
2308 | r = -EFAULT; | |
2309 | if (copy_from_user(&msrs, user_msrs, sizeof msrs)) | |
2310 | goto out; | |
2311 | ||
2312 | r = -E2BIG; | |
2313 | if (msrs.nmsrs >= MAX_IO_MSRS) | |
2314 | goto out; | |
2315 | ||
2316 | r = -ENOMEM; | |
2317 | size = sizeof(struct kvm_msr_entry) * msrs.nmsrs; | |
2318 | entries = vmalloc(size); | |
2319 | if (!entries) | |
2320 | goto out; | |
2321 | ||
2322 | r = -EFAULT; | |
2323 | if (copy_from_user(entries, user_msrs->entries, size)) | |
2324 | goto out_free; | |
2325 | ||
bccf2150 | 2326 | r = n = __msr_io(vcpu, &msrs, entries, do_msr); |
6aa8b732 AK |
2327 | if (r < 0) |
2328 | goto out_free; | |
2329 | ||
2330 | r = -EFAULT; | |
2331 | if (writeback && copy_to_user(user_msrs->entries, entries, size)) | |
2332 | goto out_free; | |
2333 | ||
2334 | r = n; | |
2335 | ||
2336 | out_free: | |
2337 | vfree(entries); | |
2338 | out: | |
2339 | return r; | |
2340 | } | |
2341 | ||
2342 | /* | |
2343 | * Translate a guest virtual address to a guest physical address. | |
2344 | */ | |
bccf2150 AK |
2345 | static int kvm_vcpu_ioctl_translate(struct kvm_vcpu *vcpu, |
2346 | struct kvm_translation *tr) | |
6aa8b732 AK |
2347 | { |
2348 | unsigned long vaddr = tr->linear_address; | |
6aa8b732 AK |
2349 | gpa_t gpa; |
2350 | ||
bccf2150 | 2351 | vcpu_load(vcpu); |
11ec2804 | 2352 | mutex_lock(&vcpu->kvm->lock); |
6aa8b732 AK |
2353 | gpa = vcpu->mmu.gva_to_gpa(vcpu, vaddr); |
2354 | tr->physical_address = gpa; | |
2355 | tr->valid = gpa != UNMAPPED_GVA; | |
2356 | tr->writeable = 1; | |
2357 | tr->usermode = 0; | |
11ec2804 | 2358 | mutex_unlock(&vcpu->kvm->lock); |
6aa8b732 AK |
2359 | vcpu_put(vcpu); |
2360 | ||
2361 | return 0; | |
2362 | } | |
2363 | ||
bccf2150 AK |
2364 | static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, |
2365 | struct kvm_interrupt *irq) | |
6aa8b732 | 2366 | { |
6aa8b732 AK |
2367 | if (irq->irq < 0 || irq->irq >= 256) |
2368 | return -EINVAL; | |
97222cc8 ED |
2369 | if (irqchip_in_kernel(vcpu->kvm)) |
2370 | return -ENXIO; | |
bccf2150 | 2371 | vcpu_load(vcpu); |
6aa8b732 AK |
2372 | |
2373 | set_bit(irq->irq, vcpu->irq_pending); | |
2374 | set_bit(irq->irq / BITS_PER_LONG, &vcpu->irq_summary); | |
2375 | ||
2376 | vcpu_put(vcpu); | |
2377 | ||
2378 | return 0; | |
2379 | } | |
2380 | ||
bccf2150 AK |
2381 | static int kvm_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu, |
2382 | struct kvm_debug_guest *dbg) | |
6aa8b732 | 2383 | { |
6aa8b732 AK |
2384 | int r; |
2385 | ||
bccf2150 | 2386 | vcpu_load(vcpu); |
6aa8b732 AK |
2387 | |
2388 | r = kvm_arch_ops->set_guest_debug(vcpu, dbg); | |
2389 | ||
2390 | vcpu_put(vcpu); | |
2391 | ||
2392 | return r; | |
2393 | } | |
2394 | ||
9a2bb7f4 AK |
2395 | static struct page *kvm_vcpu_nopage(struct vm_area_struct *vma, |
2396 | unsigned long address, | |
2397 | int *type) | |
2398 | { | |
2399 | struct kvm_vcpu *vcpu = vma->vm_file->private_data; | |
2400 | unsigned long pgoff; | |
2401 | struct page *page; | |
2402 | ||
9a2bb7f4 | 2403 | pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff; |
039576c0 AK |
2404 | if (pgoff == 0) |
2405 | page = virt_to_page(vcpu->run); | |
2406 | else if (pgoff == KVM_PIO_PAGE_OFFSET) | |
2407 | page = virt_to_page(vcpu->pio_data); | |
2408 | else | |
9a2bb7f4 | 2409 | return NOPAGE_SIGBUS; |
9a2bb7f4 | 2410 | get_page(page); |
cd0d9137 NAQ |
2411 | if (type != NULL) |
2412 | *type = VM_FAULT_MINOR; | |
2413 | ||
9a2bb7f4 AK |
2414 | return page; |
2415 | } | |
2416 | ||
2417 | static struct vm_operations_struct kvm_vcpu_vm_ops = { | |
2418 | .nopage = kvm_vcpu_nopage, | |
2419 | }; | |
2420 | ||
2421 | static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma) | |
2422 | { | |
2423 | vma->vm_ops = &kvm_vcpu_vm_ops; | |
2424 | return 0; | |
2425 | } | |
2426 | ||
bccf2150 AK |
2427 | static int kvm_vcpu_release(struct inode *inode, struct file *filp) |
2428 | { | |
2429 | struct kvm_vcpu *vcpu = filp->private_data; | |
2430 | ||
2431 | fput(vcpu->kvm->filp); | |
2432 | return 0; | |
2433 | } | |
2434 | ||
2435 | static struct file_operations kvm_vcpu_fops = { | |
2436 | .release = kvm_vcpu_release, | |
2437 | .unlocked_ioctl = kvm_vcpu_ioctl, | |
2438 | .compat_ioctl = kvm_vcpu_ioctl, | |
9a2bb7f4 | 2439 | .mmap = kvm_vcpu_mmap, |
bccf2150 AK |
2440 | }; |
2441 | ||
2442 | /* | |
2443 | * Allocates an inode for the vcpu. | |
2444 | */ | |
2445 | static int create_vcpu_fd(struct kvm_vcpu *vcpu) | |
2446 | { | |
2447 | int fd, r; | |
2448 | struct inode *inode; | |
2449 | struct file *file; | |
2450 | ||
d6d28168 AK |
2451 | r = anon_inode_getfd(&fd, &inode, &file, |
2452 | "kvm-vcpu", &kvm_vcpu_fops, vcpu); | |
2453 | if (r) | |
2454 | return r; | |
bccf2150 | 2455 | atomic_inc(&vcpu->kvm->filp->f_count); |
bccf2150 | 2456 | return fd; |
bccf2150 AK |
2457 | } |
2458 | ||
c5ea7660 AK |
2459 | /* |
2460 | * Creates some virtual cpus. Good luck creating more than one. | |
2461 | */ | |
2462 | static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n) | |
2463 | { | |
2464 | int r; | |
2465 | struct kvm_vcpu *vcpu; | |
2466 | ||
c5ea7660 | 2467 | if (!valid_vcpu(n)) |
fb3f0f51 | 2468 | return -EINVAL; |
c5ea7660 | 2469 | |
fb3f0f51 RR |
2470 | vcpu = kvm_arch_ops->vcpu_create(kvm, n); |
2471 | if (IS_ERR(vcpu)) | |
2472 | return PTR_ERR(vcpu); | |
c5ea7660 | 2473 | |
15ad7146 AK |
2474 | preempt_notifier_init(&vcpu->preempt_notifier, &kvm_preempt_ops); |
2475 | ||
b114b080 RR |
2476 | /* We do fxsave: this must be aligned. */ |
2477 | BUG_ON((unsigned long)&vcpu->host_fx_image & 0xF); | |
2478 | ||
fb3f0f51 | 2479 | vcpu_load(vcpu); |
c5ea7660 | 2480 | r = kvm_mmu_setup(vcpu); |
c5ea7660 | 2481 | vcpu_put(vcpu); |
c5ea7660 | 2482 | if (r < 0) |
fb3f0f51 RR |
2483 | goto free_vcpu; |
2484 | ||
11ec2804 | 2485 | mutex_lock(&kvm->lock); |
fb3f0f51 RR |
2486 | if (kvm->vcpus[n]) { |
2487 | r = -EEXIST; | |
11ec2804 | 2488 | mutex_unlock(&kvm->lock); |
fb3f0f51 RR |
2489 | goto mmu_unload; |
2490 | } | |
2491 | kvm->vcpus[n] = vcpu; | |
11ec2804 | 2492 | mutex_unlock(&kvm->lock); |
c5ea7660 | 2493 | |
fb3f0f51 | 2494 | /* Now it's all set up, let userspace reach it */ |
bccf2150 AK |
2495 | r = create_vcpu_fd(vcpu); |
2496 | if (r < 0) | |
fb3f0f51 RR |
2497 | goto unlink; |
2498 | return r; | |
39c3b86e | 2499 | |
fb3f0f51 | 2500 | unlink: |
11ec2804 | 2501 | mutex_lock(&kvm->lock); |
fb3f0f51 | 2502 | kvm->vcpus[n] = NULL; |
11ec2804 | 2503 | mutex_unlock(&kvm->lock); |
a2fa3e9f | 2504 | |
fb3f0f51 RR |
2505 | mmu_unload: |
2506 | vcpu_load(vcpu); | |
2507 | kvm_mmu_unload(vcpu); | |
2508 | vcpu_put(vcpu); | |
c5ea7660 | 2509 | |
fb3f0f51 RR |
2510 | free_vcpu: |
2511 | kvm_arch_ops->vcpu_free(vcpu); | |
c5ea7660 AK |
2512 | return r; |
2513 | } | |
2514 | ||
2cc51560 ED |
2515 | static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu) |
2516 | { | |
2517 | u64 efer; | |
2518 | int i; | |
2519 | struct kvm_cpuid_entry *e, *entry; | |
2520 | ||
2521 | rdmsrl(MSR_EFER, efer); | |
2522 | entry = NULL; | |
2523 | for (i = 0; i < vcpu->cpuid_nent; ++i) { | |
2524 | e = &vcpu->cpuid_entries[i]; | |
2525 | if (e->function == 0x80000001) { | |
2526 | entry = e; | |
2527 | break; | |
2528 | } | |
2529 | } | |
4c981b43 | 2530 | if (entry && (entry->edx & (1 << 20)) && !(efer & EFER_NX)) { |
2cc51560 | 2531 | entry->edx &= ~(1 << 20); |
4c981b43 | 2532 | printk(KERN_INFO "kvm: guest NX capability removed\n"); |
2cc51560 ED |
2533 | } |
2534 | } | |
2535 | ||
06465c5a AK |
2536 | static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu, |
2537 | struct kvm_cpuid *cpuid, | |
2538 | struct kvm_cpuid_entry __user *entries) | |
2539 | { | |
2540 | int r; | |
2541 | ||
2542 | r = -E2BIG; | |
2543 | if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) | |
2544 | goto out; | |
2545 | r = -EFAULT; | |
2546 | if (copy_from_user(&vcpu->cpuid_entries, entries, | |
2547 | cpuid->nent * sizeof(struct kvm_cpuid_entry))) | |
2548 | goto out; | |
2549 | vcpu->cpuid_nent = cpuid->nent; | |
2cc51560 | 2550 | cpuid_fix_nx_cap(vcpu); |
06465c5a AK |
2551 | return 0; |
2552 | ||
2553 | out: | |
2554 | return r; | |
2555 | } | |
2556 | ||
1961d276 AK |
2557 | static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset) |
2558 | { | |
2559 | if (sigset) { | |
2560 | sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
2561 | vcpu->sigset_active = 1; | |
2562 | vcpu->sigset = *sigset; | |
2563 | } else | |
2564 | vcpu->sigset_active = 0; | |
2565 | return 0; | |
2566 | } | |
2567 | ||
b8836737 AK |
2568 | /* |
2569 | * fxsave fpu state. Taken from x86_64/processor.h. To be killed when | |
2570 | * we have asm/x86/processor.h | |
2571 | */ | |
2572 | struct fxsave { | |
2573 | u16 cwd; | |
2574 | u16 swd; | |
2575 | u16 twd; | |
2576 | u16 fop; | |
2577 | u64 rip; | |
2578 | u64 rdp; | |
2579 | u32 mxcsr; | |
2580 | u32 mxcsr_mask; | |
2581 | u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */ | |
2582 | #ifdef CONFIG_X86_64 | |
2583 | u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */ | |
2584 | #else | |
2585 | u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */ | |
2586 | #endif | |
2587 | }; | |
2588 | ||
2589 | static int kvm_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
2590 | { | |
b114b080 | 2591 | struct fxsave *fxsave = (struct fxsave *)&vcpu->guest_fx_image; |
b8836737 AK |
2592 | |
2593 | vcpu_load(vcpu); | |
2594 | ||
2595 | memcpy(fpu->fpr, fxsave->st_space, 128); | |
2596 | fpu->fcw = fxsave->cwd; | |
2597 | fpu->fsw = fxsave->swd; | |
2598 | fpu->ftwx = fxsave->twd; | |
2599 | fpu->last_opcode = fxsave->fop; | |
2600 | fpu->last_ip = fxsave->rip; | |
2601 | fpu->last_dp = fxsave->rdp; | |
2602 | memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space); | |
2603 | ||
2604 | vcpu_put(vcpu); | |
2605 | ||
2606 | return 0; | |
2607 | } | |
2608 | ||
2609 | static int kvm_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu) | |
2610 | { | |
b114b080 | 2611 | struct fxsave *fxsave = (struct fxsave *)&vcpu->guest_fx_image; |
b8836737 AK |
2612 | |
2613 | vcpu_load(vcpu); | |
2614 | ||
2615 | memcpy(fxsave->st_space, fpu->fpr, 128); | |
2616 | fxsave->cwd = fpu->fcw; | |
2617 | fxsave->swd = fpu->fsw; | |
2618 | fxsave->twd = fpu->ftwx; | |
2619 | fxsave->fop = fpu->last_opcode; | |
2620 | fxsave->rip = fpu->last_ip; | |
2621 | fxsave->rdp = fpu->last_dp; | |
2622 | memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space); | |
2623 | ||
2624 | vcpu_put(vcpu); | |
2625 | ||
2626 | return 0; | |
2627 | } | |
2628 | ||
bccf2150 AK |
2629 | static long kvm_vcpu_ioctl(struct file *filp, |
2630 | unsigned int ioctl, unsigned long arg) | |
6aa8b732 | 2631 | { |
bccf2150 | 2632 | struct kvm_vcpu *vcpu = filp->private_data; |
2f366987 | 2633 | void __user *argp = (void __user *)arg; |
6aa8b732 AK |
2634 | int r = -EINVAL; |
2635 | ||
2636 | switch (ioctl) { | |
9a2bb7f4 | 2637 | case KVM_RUN: |
f0fe5108 AK |
2638 | r = -EINVAL; |
2639 | if (arg) | |
2640 | goto out; | |
9a2bb7f4 | 2641 | r = kvm_vcpu_ioctl_run(vcpu, vcpu->run); |
6aa8b732 | 2642 | break; |
6aa8b732 AK |
2643 | case KVM_GET_REGS: { |
2644 | struct kvm_regs kvm_regs; | |
2645 | ||
bccf2150 AK |
2646 | memset(&kvm_regs, 0, sizeof kvm_regs); |
2647 | r = kvm_vcpu_ioctl_get_regs(vcpu, &kvm_regs); | |
6aa8b732 AK |
2648 | if (r) |
2649 | goto out; | |
2650 | r = -EFAULT; | |
2f366987 | 2651 | if (copy_to_user(argp, &kvm_regs, sizeof kvm_regs)) |
6aa8b732 AK |
2652 | goto out; |
2653 | r = 0; | |
2654 | break; | |
2655 | } | |
2656 | case KVM_SET_REGS: { | |
2657 | struct kvm_regs kvm_regs; | |
2658 | ||
2659 | r = -EFAULT; | |
2f366987 | 2660 | if (copy_from_user(&kvm_regs, argp, sizeof kvm_regs)) |
6aa8b732 | 2661 | goto out; |
bccf2150 | 2662 | r = kvm_vcpu_ioctl_set_regs(vcpu, &kvm_regs); |
6aa8b732 AK |
2663 | if (r) |
2664 | goto out; | |
2665 | r = 0; | |
2666 | break; | |
2667 | } | |
2668 | case KVM_GET_SREGS: { | |
2669 | struct kvm_sregs kvm_sregs; | |
2670 | ||
bccf2150 AK |
2671 | memset(&kvm_sregs, 0, sizeof kvm_sregs); |
2672 | r = kvm_vcpu_ioctl_get_sregs(vcpu, &kvm_sregs); | |
6aa8b732 AK |
2673 | if (r) |
2674 | goto out; | |
2675 | r = -EFAULT; | |
2f366987 | 2676 | if (copy_to_user(argp, &kvm_sregs, sizeof kvm_sregs)) |
6aa8b732 AK |
2677 | goto out; |
2678 | r = 0; | |
2679 | break; | |
2680 | } | |
2681 | case KVM_SET_SREGS: { | |
2682 | struct kvm_sregs kvm_sregs; | |
2683 | ||
2684 | r = -EFAULT; | |
2f366987 | 2685 | if (copy_from_user(&kvm_sregs, argp, sizeof kvm_sregs)) |
6aa8b732 | 2686 | goto out; |
bccf2150 | 2687 | r = kvm_vcpu_ioctl_set_sregs(vcpu, &kvm_sregs); |
6aa8b732 AK |
2688 | if (r) |
2689 | goto out; | |
2690 | r = 0; | |
2691 | break; | |
2692 | } | |
2693 | case KVM_TRANSLATE: { | |
2694 | struct kvm_translation tr; | |
2695 | ||
2696 | r = -EFAULT; | |
2f366987 | 2697 | if (copy_from_user(&tr, argp, sizeof tr)) |
6aa8b732 | 2698 | goto out; |
bccf2150 | 2699 | r = kvm_vcpu_ioctl_translate(vcpu, &tr); |
6aa8b732 AK |
2700 | if (r) |
2701 | goto out; | |
2702 | r = -EFAULT; | |
2f366987 | 2703 | if (copy_to_user(argp, &tr, sizeof tr)) |
6aa8b732 AK |
2704 | goto out; |
2705 | r = 0; | |
2706 | break; | |
2707 | } | |
2708 | case KVM_INTERRUPT: { | |
2709 | struct kvm_interrupt irq; | |
2710 | ||
2711 | r = -EFAULT; | |
2f366987 | 2712 | if (copy_from_user(&irq, argp, sizeof irq)) |
6aa8b732 | 2713 | goto out; |
bccf2150 | 2714 | r = kvm_vcpu_ioctl_interrupt(vcpu, &irq); |
6aa8b732 AK |
2715 | if (r) |
2716 | goto out; | |
2717 | r = 0; | |
2718 | break; | |
2719 | } | |
2720 | case KVM_DEBUG_GUEST: { | |
2721 | struct kvm_debug_guest dbg; | |
2722 | ||
2723 | r = -EFAULT; | |
2f366987 | 2724 | if (copy_from_user(&dbg, argp, sizeof dbg)) |
6aa8b732 | 2725 | goto out; |
bccf2150 | 2726 | r = kvm_vcpu_ioctl_debug_guest(vcpu, &dbg); |
6aa8b732 AK |
2727 | if (r) |
2728 | goto out; | |
2729 | r = 0; | |
2730 | break; | |
2731 | } | |
bccf2150 | 2732 | case KVM_GET_MSRS: |
35f3f286 | 2733 | r = msr_io(vcpu, argp, kvm_get_msr, 1); |
bccf2150 AK |
2734 | break; |
2735 | case KVM_SET_MSRS: | |
2736 | r = msr_io(vcpu, argp, do_set_msr, 0); | |
2737 | break; | |
06465c5a AK |
2738 | case KVM_SET_CPUID: { |
2739 | struct kvm_cpuid __user *cpuid_arg = argp; | |
2740 | struct kvm_cpuid cpuid; | |
2741 | ||
2742 | r = -EFAULT; | |
2743 | if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid)) | |
2744 | goto out; | |
2745 | r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries); | |
2746 | if (r) | |
2747 | goto out; | |
2748 | break; | |
2749 | } | |
1961d276 AK |
2750 | case KVM_SET_SIGNAL_MASK: { |
2751 | struct kvm_signal_mask __user *sigmask_arg = argp; | |
2752 | struct kvm_signal_mask kvm_sigmask; | |
2753 | sigset_t sigset, *p; | |
2754 | ||
2755 | p = NULL; | |
2756 | if (argp) { | |
2757 | r = -EFAULT; | |
2758 | if (copy_from_user(&kvm_sigmask, argp, | |
2759 | sizeof kvm_sigmask)) | |
2760 | goto out; | |
2761 | r = -EINVAL; | |
2762 | if (kvm_sigmask.len != sizeof sigset) | |
2763 | goto out; | |
2764 | r = -EFAULT; | |
2765 | if (copy_from_user(&sigset, sigmask_arg->sigset, | |
2766 | sizeof sigset)) | |
2767 | goto out; | |
2768 | p = &sigset; | |
2769 | } | |
2770 | r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset); | |
2771 | break; | |
2772 | } | |
b8836737 AK |
2773 | case KVM_GET_FPU: { |
2774 | struct kvm_fpu fpu; | |
2775 | ||
2776 | memset(&fpu, 0, sizeof fpu); | |
2777 | r = kvm_vcpu_ioctl_get_fpu(vcpu, &fpu); | |
2778 | if (r) | |
2779 | goto out; | |
2780 | r = -EFAULT; | |
2781 | if (copy_to_user(argp, &fpu, sizeof fpu)) | |
2782 | goto out; | |
2783 | r = 0; | |
2784 | break; | |
2785 | } | |
2786 | case KVM_SET_FPU: { | |
2787 | struct kvm_fpu fpu; | |
2788 | ||
2789 | r = -EFAULT; | |
2790 | if (copy_from_user(&fpu, argp, sizeof fpu)) | |
2791 | goto out; | |
2792 | r = kvm_vcpu_ioctl_set_fpu(vcpu, &fpu); | |
2793 | if (r) | |
2794 | goto out; | |
2795 | r = 0; | |
2796 | break; | |
2797 | } | |
bccf2150 AK |
2798 | default: |
2799 | ; | |
2800 | } | |
2801 | out: | |
2802 | return r; | |
2803 | } | |
2804 | ||
2805 | static long kvm_vm_ioctl(struct file *filp, | |
2806 | unsigned int ioctl, unsigned long arg) | |
2807 | { | |
2808 | struct kvm *kvm = filp->private_data; | |
2809 | void __user *argp = (void __user *)arg; | |
2810 | int r = -EINVAL; | |
2811 | ||
2812 | switch (ioctl) { | |
2813 | case KVM_CREATE_VCPU: | |
2814 | r = kvm_vm_ioctl_create_vcpu(kvm, arg); | |
2815 | if (r < 0) | |
2816 | goto out; | |
2817 | break; | |
6aa8b732 AK |
2818 | case KVM_SET_MEMORY_REGION: { |
2819 | struct kvm_memory_region kvm_mem; | |
2820 | ||
2821 | r = -EFAULT; | |
2f366987 | 2822 | if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem)) |
6aa8b732 | 2823 | goto out; |
2c6f5df9 | 2824 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_mem); |
6aa8b732 AK |
2825 | if (r) |
2826 | goto out; | |
2827 | break; | |
2828 | } | |
2829 | case KVM_GET_DIRTY_LOG: { | |
2830 | struct kvm_dirty_log log; | |
2831 | ||
2832 | r = -EFAULT; | |
2f366987 | 2833 | if (copy_from_user(&log, argp, sizeof log)) |
6aa8b732 | 2834 | goto out; |
2c6f5df9 | 2835 | r = kvm_vm_ioctl_get_dirty_log(kvm, &log); |
6aa8b732 AK |
2836 | if (r) |
2837 | goto out; | |
2838 | break; | |
2839 | } | |
e8207547 AK |
2840 | case KVM_SET_MEMORY_ALIAS: { |
2841 | struct kvm_memory_alias alias; | |
2842 | ||
2843 | r = -EFAULT; | |
2844 | if (copy_from_user(&alias, argp, sizeof alias)) | |
2845 | goto out; | |
2846 | r = kvm_vm_ioctl_set_memory_alias(kvm, &alias); | |
2847 | if (r) | |
2848 | goto out; | |
2849 | break; | |
2850 | } | |
85f455f7 ED |
2851 | case KVM_CREATE_IRQCHIP: |
2852 | r = -ENOMEM; | |
2853 | kvm->vpic = kvm_create_pic(kvm); | |
1fd4f2a5 ED |
2854 | if (kvm->vpic) { |
2855 | r = kvm_ioapic_init(kvm); | |
2856 | if (r) { | |
2857 | kfree(kvm->vpic); | |
2858 | kvm->vpic = NULL; | |
2859 | goto out; | |
2860 | } | |
2861 | } | |
85f455f7 ED |
2862 | else |
2863 | goto out; | |
2864 | break; | |
2865 | case KVM_IRQ_LINE: { | |
2866 | struct kvm_irq_level irq_event; | |
2867 | ||
2868 | r = -EFAULT; | |
2869 | if (copy_from_user(&irq_event, argp, sizeof irq_event)) | |
2870 | goto out; | |
2871 | if (irqchip_in_kernel(kvm)) { | |
9cf98828 | 2872 | mutex_lock(&kvm->lock); |
85f455f7 ED |
2873 | if (irq_event.irq < 16) |
2874 | kvm_pic_set_irq(pic_irqchip(kvm), | |
2875 | irq_event.irq, | |
2876 | irq_event.level); | |
1fd4f2a5 ED |
2877 | kvm_ioapic_set_irq(kvm->vioapic, |
2878 | irq_event.irq, | |
2879 | irq_event.level); | |
9cf98828 | 2880 | mutex_unlock(&kvm->lock); |
85f455f7 ED |
2881 | r = 0; |
2882 | } | |
2883 | break; | |
2884 | } | |
6ceb9d79 HQ |
2885 | case KVM_GET_IRQCHIP: { |
2886 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
2887 | struct kvm_irqchip chip; | |
2888 | ||
2889 | r = -EFAULT; | |
2890 | if (copy_from_user(&chip, argp, sizeof chip)) | |
2891 | goto out; | |
2892 | r = -ENXIO; | |
2893 | if (!irqchip_in_kernel(kvm)) | |
2894 | goto out; | |
2895 | r = kvm_vm_ioctl_get_irqchip(kvm, &chip); | |
2896 | if (r) | |
2897 | goto out; | |
2898 | r = -EFAULT; | |
2899 | if (copy_to_user(argp, &chip, sizeof chip)) | |
2900 | goto out; | |
2901 | r = 0; | |
2902 | break; | |
2903 | } | |
2904 | case KVM_SET_IRQCHIP: { | |
2905 | /* 0: PIC master, 1: PIC slave, 2: IOAPIC */ | |
2906 | struct kvm_irqchip chip; | |
2907 | ||
2908 | r = -EFAULT; | |
2909 | if (copy_from_user(&chip, argp, sizeof chip)) | |
2910 | goto out; | |
2911 | r = -ENXIO; | |
2912 | if (!irqchip_in_kernel(kvm)) | |
2913 | goto out; | |
2914 | r = kvm_vm_ioctl_set_irqchip(kvm, &chip); | |
2915 | if (r) | |
2916 | goto out; | |
2917 | r = 0; | |
2918 | break; | |
2919 | } | |
f17abe9a AK |
2920 | default: |
2921 | ; | |
2922 | } | |
2923 | out: | |
2924 | return r; | |
2925 | } | |
2926 | ||
2927 | static struct page *kvm_vm_nopage(struct vm_area_struct *vma, | |
2928 | unsigned long address, | |
2929 | int *type) | |
2930 | { | |
2931 | struct kvm *kvm = vma->vm_file->private_data; | |
2932 | unsigned long pgoff; | |
f17abe9a AK |
2933 | struct page *page; |
2934 | ||
f17abe9a | 2935 | pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff; |
954bbbc2 | 2936 | page = gfn_to_page(kvm, pgoff); |
f17abe9a AK |
2937 | if (!page) |
2938 | return NOPAGE_SIGBUS; | |
2939 | get_page(page); | |
cd0d9137 NAQ |
2940 | if (type != NULL) |
2941 | *type = VM_FAULT_MINOR; | |
2942 | ||
f17abe9a AK |
2943 | return page; |
2944 | } | |
2945 | ||
2946 | static struct vm_operations_struct kvm_vm_vm_ops = { | |
2947 | .nopage = kvm_vm_nopage, | |
2948 | }; | |
2949 | ||
2950 | static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma) | |
2951 | { | |
2952 | vma->vm_ops = &kvm_vm_vm_ops; | |
2953 | return 0; | |
2954 | } | |
2955 | ||
2956 | static struct file_operations kvm_vm_fops = { | |
2957 | .release = kvm_vm_release, | |
2958 | .unlocked_ioctl = kvm_vm_ioctl, | |
2959 | .compat_ioctl = kvm_vm_ioctl, | |
2960 | .mmap = kvm_vm_mmap, | |
2961 | }; | |
2962 | ||
2963 | static int kvm_dev_ioctl_create_vm(void) | |
2964 | { | |
2965 | int fd, r; | |
2966 | struct inode *inode; | |
2967 | struct file *file; | |
2968 | struct kvm *kvm; | |
2969 | ||
f17abe9a | 2970 | kvm = kvm_create_vm(); |
d6d28168 AK |
2971 | if (IS_ERR(kvm)) |
2972 | return PTR_ERR(kvm); | |
2973 | r = anon_inode_getfd(&fd, &inode, &file, "kvm-vm", &kvm_vm_fops, kvm); | |
2974 | if (r) { | |
2975 | kvm_destroy_vm(kvm); | |
2976 | return r; | |
f17abe9a AK |
2977 | } |
2978 | ||
bccf2150 | 2979 | kvm->filp = file; |
f17abe9a | 2980 | |
f17abe9a | 2981 | return fd; |
f17abe9a AK |
2982 | } |
2983 | ||
2984 | static long kvm_dev_ioctl(struct file *filp, | |
2985 | unsigned int ioctl, unsigned long arg) | |
2986 | { | |
2987 | void __user *argp = (void __user *)arg; | |
07c45a36 | 2988 | long r = -EINVAL; |
f17abe9a AK |
2989 | |
2990 | switch (ioctl) { | |
2991 | case KVM_GET_API_VERSION: | |
f0fe5108 AK |
2992 | r = -EINVAL; |
2993 | if (arg) | |
2994 | goto out; | |
f17abe9a AK |
2995 | r = KVM_API_VERSION; |
2996 | break; | |
2997 | case KVM_CREATE_VM: | |
f0fe5108 AK |
2998 | r = -EINVAL; |
2999 | if (arg) | |
3000 | goto out; | |
f17abe9a AK |
3001 | r = kvm_dev_ioctl_create_vm(); |
3002 | break; | |
6aa8b732 | 3003 | case KVM_GET_MSR_INDEX_LIST: { |
2f366987 | 3004 | struct kvm_msr_list __user *user_msr_list = argp; |
6aa8b732 AK |
3005 | struct kvm_msr_list msr_list; |
3006 | unsigned n; | |
3007 | ||
3008 | r = -EFAULT; | |
3009 | if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list)) | |
3010 | goto out; | |
3011 | n = msr_list.nmsrs; | |
6f00e68f | 3012 | msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs); |
6aa8b732 AK |
3013 | if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list)) |
3014 | goto out; | |
3015 | r = -E2BIG; | |
bf591b24 | 3016 | if (n < num_msrs_to_save) |
6aa8b732 AK |
3017 | goto out; |
3018 | r = -EFAULT; | |
3019 | if (copy_to_user(user_msr_list->indices, &msrs_to_save, | |
bf591b24 | 3020 | num_msrs_to_save * sizeof(u32))) |
6aa8b732 | 3021 | goto out; |
6f00e68f AK |
3022 | if (copy_to_user(user_msr_list->indices |
3023 | + num_msrs_to_save * sizeof(u32), | |
3024 | &emulated_msrs, | |
3025 | ARRAY_SIZE(emulated_msrs) * sizeof(u32))) | |
3026 | goto out; | |
6aa8b732 | 3027 | r = 0; |
cc1d8955 | 3028 | break; |
6aa8b732 | 3029 | } |
85f455f7 ED |
3030 | case KVM_CHECK_EXTENSION: { |
3031 | int ext = (long)argp; | |
3032 | ||
3033 | switch (ext) { | |
3034 | case KVM_CAP_IRQCHIP: | |
b6958ce4 | 3035 | case KVM_CAP_HLT: |
85f455f7 ED |
3036 | r = 1; |
3037 | break; | |
3038 | default: | |
3039 | r = 0; | |
3040 | break; | |
3041 | } | |
5d308f45 | 3042 | break; |
85f455f7 | 3043 | } |
07c45a36 AK |
3044 | case KVM_GET_VCPU_MMAP_SIZE: |
3045 | r = -EINVAL; | |
3046 | if (arg) | |
3047 | goto out; | |
039576c0 | 3048 | r = 2 * PAGE_SIZE; |
07c45a36 | 3049 | break; |
6aa8b732 AK |
3050 | default: |
3051 | ; | |
3052 | } | |
3053 | out: | |
3054 | return r; | |
3055 | } | |
3056 | ||
6aa8b732 | 3057 | static struct file_operations kvm_chardev_ops = { |
6aa8b732 AK |
3058 | .unlocked_ioctl = kvm_dev_ioctl, |
3059 | .compat_ioctl = kvm_dev_ioctl, | |
6aa8b732 AK |
3060 | }; |
3061 | ||
3062 | static struct miscdevice kvm_dev = { | |
bbe4432e | 3063 | KVM_MINOR, |
6aa8b732 AK |
3064 | "kvm", |
3065 | &kvm_chardev_ops, | |
3066 | }; | |
3067 | ||
774c47f1 AK |
3068 | /* |
3069 | * Make sure that a cpu that is being hot-unplugged does not have any vcpus | |
3070 | * cached on it. | |
3071 | */ | |
3072 | static void decache_vcpus_on_cpu(int cpu) | |
3073 | { | |
3074 | struct kvm *vm; | |
3075 | struct kvm_vcpu *vcpu; | |
3076 | int i; | |
3077 | ||
3078 | spin_lock(&kvm_lock); | |
11ec2804 | 3079 | list_for_each_entry(vm, &vm_list, vm_list) |
774c47f1 | 3080 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
fb3f0f51 RR |
3081 | vcpu = vm->vcpus[i]; |
3082 | if (!vcpu) | |
3083 | continue; | |
774c47f1 AK |
3084 | /* |
3085 | * If the vcpu is locked, then it is running on some | |
3086 | * other cpu and therefore it is not cached on the | |
3087 | * cpu in question. | |
3088 | * | |
3089 | * If it's not locked, check the last cpu it executed | |
3090 | * on. | |
3091 | */ | |
3092 | if (mutex_trylock(&vcpu->mutex)) { | |
3093 | if (vcpu->cpu == cpu) { | |
3094 | kvm_arch_ops->vcpu_decache(vcpu); | |
3095 | vcpu->cpu = -1; | |
3096 | } | |
3097 | mutex_unlock(&vcpu->mutex); | |
3098 | } | |
3099 | } | |
3100 | spin_unlock(&kvm_lock); | |
3101 | } | |
3102 | ||
1b6c0168 AK |
3103 | static void hardware_enable(void *junk) |
3104 | { | |
3105 | int cpu = raw_smp_processor_id(); | |
3106 | ||
3107 | if (cpu_isset(cpu, cpus_hardware_enabled)) | |
3108 | return; | |
3109 | cpu_set(cpu, cpus_hardware_enabled); | |
3110 | kvm_arch_ops->hardware_enable(NULL); | |
3111 | } | |
3112 | ||
3113 | static void hardware_disable(void *junk) | |
3114 | { | |
3115 | int cpu = raw_smp_processor_id(); | |
3116 | ||
3117 | if (!cpu_isset(cpu, cpus_hardware_enabled)) | |
3118 | return; | |
3119 | cpu_clear(cpu, cpus_hardware_enabled); | |
3120 | decache_vcpus_on_cpu(cpu); | |
3121 | kvm_arch_ops->hardware_disable(NULL); | |
3122 | } | |
3123 | ||
774c47f1 AK |
3124 | static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val, |
3125 | void *v) | |
3126 | { | |
3127 | int cpu = (long)v; | |
3128 | ||
3129 | switch (val) { | |
cec9ad27 AK |
3130 | case CPU_DYING: |
3131 | case CPU_DYING_FROZEN: | |
6ec8a856 AK |
3132 | printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n", |
3133 | cpu); | |
3134 | hardware_disable(NULL); | |
3135 | break; | |
774c47f1 | 3136 | case CPU_UP_CANCELED: |
8bb78442 | 3137 | case CPU_UP_CANCELED_FROZEN: |
43934a38 JK |
3138 | printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n", |
3139 | cpu); | |
1b6c0168 | 3140 | smp_call_function_single(cpu, hardware_disable, NULL, 0, 1); |
774c47f1 | 3141 | break; |
43934a38 | 3142 | case CPU_ONLINE: |
8bb78442 | 3143 | case CPU_ONLINE_FROZEN: |
43934a38 JK |
3144 | printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n", |
3145 | cpu); | |
1b6c0168 | 3146 | smp_call_function_single(cpu, hardware_enable, NULL, 0, 1); |
774c47f1 AK |
3147 | break; |
3148 | } | |
3149 | return NOTIFY_OK; | |
3150 | } | |
3151 | ||
9a2b85c6 RR |
3152 | static int kvm_reboot(struct notifier_block *notifier, unsigned long val, |
3153 | void *v) | |
3154 | { | |
3155 | if (val == SYS_RESTART) { | |
3156 | /* | |
3157 | * Some (well, at least mine) BIOSes hang on reboot if | |
3158 | * in vmx root mode. | |
3159 | */ | |
3160 | printk(KERN_INFO "kvm: exiting hardware virtualization\n"); | |
3161 | on_each_cpu(hardware_disable, NULL, 0, 1); | |
3162 | } | |
3163 | return NOTIFY_OK; | |
3164 | } | |
3165 | ||
3166 | static struct notifier_block kvm_reboot_notifier = { | |
3167 | .notifier_call = kvm_reboot, | |
3168 | .priority = 0, | |
3169 | }; | |
3170 | ||
2eeb2e94 GH |
3171 | void kvm_io_bus_init(struct kvm_io_bus *bus) |
3172 | { | |
3173 | memset(bus, 0, sizeof(*bus)); | |
3174 | } | |
3175 | ||
3176 | void kvm_io_bus_destroy(struct kvm_io_bus *bus) | |
3177 | { | |
3178 | int i; | |
3179 | ||
3180 | for (i = 0; i < bus->dev_count; i++) { | |
3181 | struct kvm_io_device *pos = bus->devs[i]; | |
3182 | ||
3183 | kvm_iodevice_destructor(pos); | |
3184 | } | |
3185 | } | |
3186 | ||
3187 | struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr) | |
3188 | { | |
3189 | int i; | |
3190 | ||
3191 | for (i = 0; i < bus->dev_count; i++) { | |
3192 | struct kvm_io_device *pos = bus->devs[i]; | |
3193 | ||
3194 | if (pos->in_range(pos, addr)) | |
3195 | return pos; | |
3196 | } | |
3197 | ||
3198 | return NULL; | |
3199 | } | |
3200 | ||
3201 | void kvm_io_bus_register_dev(struct kvm_io_bus *bus, struct kvm_io_device *dev) | |
3202 | { | |
3203 | BUG_ON(bus->dev_count > (NR_IOBUS_DEVS-1)); | |
3204 | ||
3205 | bus->devs[bus->dev_count++] = dev; | |
3206 | } | |
3207 | ||
774c47f1 AK |
3208 | static struct notifier_block kvm_cpu_notifier = { |
3209 | .notifier_call = kvm_cpu_hotplug, | |
3210 | .priority = 20, /* must be > scheduler priority */ | |
3211 | }; | |
3212 | ||
1165f5fe AK |
3213 | static u64 stat_get(void *_offset) |
3214 | { | |
3215 | unsigned offset = (long)_offset; | |
3216 | u64 total = 0; | |
3217 | struct kvm *kvm; | |
3218 | struct kvm_vcpu *vcpu; | |
3219 | int i; | |
3220 | ||
3221 | spin_lock(&kvm_lock); | |
3222 | list_for_each_entry(kvm, &vm_list, vm_list) | |
3223 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { | |
fb3f0f51 RR |
3224 | vcpu = kvm->vcpus[i]; |
3225 | if (vcpu) | |
3226 | total += *(u32 *)((void *)vcpu + offset); | |
1165f5fe AK |
3227 | } |
3228 | spin_unlock(&kvm_lock); | |
3229 | return total; | |
3230 | } | |
3231 | ||
3dea7ca7 | 3232 | DEFINE_SIMPLE_ATTRIBUTE(stat_fops, stat_get, NULL, "%llu\n"); |
1165f5fe | 3233 | |
6aa8b732 AK |
3234 | static __init void kvm_init_debug(void) |
3235 | { | |
3236 | struct kvm_stats_debugfs_item *p; | |
3237 | ||
8b6d44c7 | 3238 | debugfs_dir = debugfs_create_dir("kvm", NULL); |
6aa8b732 | 3239 | for (p = debugfs_entries; p->name; ++p) |
1165f5fe AK |
3240 | p->dentry = debugfs_create_file(p->name, 0444, debugfs_dir, |
3241 | (void *)(long)p->offset, | |
3242 | &stat_fops); | |
6aa8b732 AK |
3243 | } |
3244 | ||
3245 | static void kvm_exit_debug(void) | |
3246 | { | |
3247 | struct kvm_stats_debugfs_item *p; | |
3248 | ||
3249 | for (p = debugfs_entries; p->name; ++p) | |
3250 | debugfs_remove(p->dentry); | |
3251 | debugfs_remove(debugfs_dir); | |
3252 | } | |
3253 | ||
59ae6c6b AK |
3254 | static int kvm_suspend(struct sys_device *dev, pm_message_t state) |
3255 | { | |
4267c41a | 3256 | hardware_disable(NULL); |
59ae6c6b AK |
3257 | return 0; |
3258 | } | |
3259 | ||
3260 | static int kvm_resume(struct sys_device *dev) | |
3261 | { | |
4267c41a | 3262 | hardware_enable(NULL); |
59ae6c6b AK |
3263 | return 0; |
3264 | } | |
3265 | ||
3266 | static struct sysdev_class kvm_sysdev_class = { | |
3267 | set_kset_name("kvm"), | |
3268 | .suspend = kvm_suspend, | |
3269 | .resume = kvm_resume, | |
3270 | }; | |
3271 | ||
3272 | static struct sys_device kvm_sysdev = { | |
3273 | .id = 0, | |
3274 | .cls = &kvm_sysdev_class, | |
3275 | }; | |
3276 | ||
6aa8b732 AK |
3277 | hpa_t bad_page_address; |
3278 | ||
15ad7146 AK |
3279 | static inline |
3280 | struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn) | |
3281 | { | |
3282 | return container_of(pn, struct kvm_vcpu, preempt_notifier); | |
3283 | } | |
3284 | ||
3285 | static void kvm_sched_in(struct preempt_notifier *pn, int cpu) | |
3286 | { | |
3287 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); | |
3288 | ||
3289 | kvm_arch_ops->vcpu_load(vcpu, cpu); | |
3290 | } | |
3291 | ||
3292 | static void kvm_sched_out(struct preempt_notifier *pn, | |
3293 | struct task_struct *next) | |
3294 | { | |
3295 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); | |
3296 | ||
3297 | kvm_arch_ops->vcpu_put(vcpu); | |
3298 | } | |
3299 | ||
c16f862d RR |
3300 | int kvm_init_arch(struct kvm_arch_ops *ops, unsigned int vcpu_size, |
3301 | struct module *module) | |
6aa8b732 AK |
3302 | { |
3303 | int r; | |
002c7f7c | 3304 | int cpu; |
6aa8b732 | 3305 | |
09db28b8 YI |
3306 | if (kvm_arch_ops) { |
3307 | printk(KERN_ERR "kvm: already loaded the other module\n"); | |
3308 | return -EEXIST; | |
3309 | } | |
3310 | ||
e097f35c | 3311 | if (!ops->cpu_has_kvm_support()) { |
6aa8b732 AK |
3312 | printk(KERN_ERR "kvm: no hardware support\n"); |
3313 | return -EOPNOTSUPP; | |
3314 | } | |
e097f35c | 3315 | if (ops->disabled_by_bios()) { |
6aa8b732 AK |
3316 | printk(KERN_ERR "kvm: disabled by bios\n"); |
3317 | return -EOPNOTSUPP; | |
3318 | } | |
3319 | ||
e097f35c YI |
3320 | kvm_arch_ops = ops; |
3321 | ||
6aa8b732 AK |
3322 | r = kvm_arch_ops->hardware_setup(); |
3323 | if (r < 0) | |
ca45aaae | 3324 | goto out; |
6aa8b732 | 3325 | |
002c7f7c YS |
3326 | for_each_online_cpu(cpu) { |
3327 | smp_call_function_single(cpu, | |
3328 | kvm_arch_ops->check_processor_compatibility, | |
3329 | &r, 0, 1); | |
3330 | if (r < 0) | |
3331 | goto out_free_0; | |
3332 | } | |
3333 | ||
1b6c0168 | 3334 | on_each_cpu(hardware_enable, NULL, 0, 1); |
774c47f1 AK |
3335 | r = register_cpu_notifier(&kvm_cpu_notifier); |
3336 | if (r) | |
3337 | goto out_free_1; | |
6aa8b732 AK |
3338 | register_reboot_notifier(&kvm_reboot_notifier); |
3339 | ||
59ae6c6b AK |
3340 | r = sysdev_class_register(&kvm_sysdev_class); |
3341 | if (r) | |
3342 | goto out_free_2; | |
3343 | ||
3344 | r = sysdev_register(&kvm_sysdev); | |
3345 | if (r) | |
3346 | goto out_free_3; | |
3347 | ||
c16f862d RR |
3348 | /* A kmem cache lets us meet the alignment requirements of fx_save. */ |
3349 | kvm_vcpu_cache = kmem_cache_create("kvm_vcpu", vcpu_size, | |
3350 | __alignof__(struct kvm_vcpu), 0, 0); | |
3351 | if (!kvm_vcpu_cache) { | |
3352 | r = -ENOMEM; | |
3353 | goto out_free_4; | |
3354 | } | |
3355 | ||
6aa8b732 AK |
3356 | kvm_chardev_ops.owner = module; |
3357 | ||
3358 | r = misc_register(&kvm_dev); | |
3359 | if (r) { | |
3360 | printk (KERN_ERR "kvm: misc device register failed\n"); | |
3361 | goto out_free; | |
3362 | } | |
3363 | ||
15ad7146 AK |
3364 | kvm_preempt_ops.sched_in = kvm_sched_in; |
3365 | kvm_preempt_ops.sched_out = kvm_sched_out; | |
3366 | ||
6aa8b732 AK |
3367 | return r; |
3368 | ||
3369 | out_free: | |
c16f862d RR |
3370 | kmem_cache_destroy(kvm_vcpu_cache); |
3371 | out_free_4: | |
59ae6c6b AK |
3372 | sysdev_unregister(&kvm_sysdev); |
3373 | out_free_3: | |
3374 | sysdev_class_unregister(&kvm_sysdev_class); | |
3375 | out_free_2: | |
6aa8b732 | 3376 | unregister_reboot_notifier(&kvm_reboot_notifier); |
774c47f1 AK |
3377 | unregister_cpu_notifier(&kvm_cpu_notifier); |
3378 | out_free_1: | |
1b6c0168 | 3379 | on_each_cpu(hardware_disable, NULL, 0, 1); |
002c7f7c | 3380 | out_free_0: |
6aa8b732 | 3381 | kvm_arch_ops->hardware_unsetup(); |
ca45aaae AK |
3382 | out: |
3383 | kvm_arch_ops = NULL; | |
6aa8b732 AK |
3384 | return r; |
3385 | } | |
3386 | ||
3387 | void kvm_exit_arch(void) | |
3388 | { | |
3389 | misc_deregister(&kvm_dev); | |
c16f862d | 3390 | kmem_cache_destroy(kvm_vcpu_cache); |
59ae6c6b AK |
3391 | sysdev_unregister(&kvm_sysdev); |
3392 | sysdev_class_unregister(&kvm_sysdev_class); | |
6aa8b732 | 3393 | unregister_reboot_notifier(&kvm_reboot_notifier); |
59ae6c6b | 3394 | unregister_cpu_notifier(&kvm_cpu_notifier); |
1b6c0168 | 3395 | on_each_cpu(hardware_disable, NULL, 0, 1); |
6aa8b732 | 3396 | kvm_arch_ops->hardware_unsetup(); |
09db28b8 | 3397 | kvm_arch_ops = NULL; |
6aa8b732 AK |
3398 | } |
3399 | ||
3400 | static __init int kvm_init(void) | |
3401 | { | |
3402 | static struct page *bad_page; | |
37e29d90 AK |
3403 | int r; |
3404 | ||
b5a33a75 AK |
3405 | r = kvm_mmu_module_init(); |
3406 | if (r) | |
3407 | goto out4; | |
3408 | ||
6aa8b732 AK |
3409 | kvm_init_debug(); |
3410 | ||
bf591b24 MR |
3411 | kvm_init_msr_list(); |
3412 | ||
6aa8b732 AK |
3413 | if ((bad_page = alloc_page(GFP_KERNEL)) == NULL) { |
3414 | r = -ENOMEM; | |
3415 | goto out; | |
3416 | } | |
3417 | ||
3418 | bad_page_address = page_to_pfn(bad_page) << PAGE_SHIFT; | |
3419 | memset(__va(bad_page_address), 0, PAGE_SIZE); | |
3420 | ||
58e690e6 | 3421 | return 0; |
6aa8b732 AK |
3422 | |
3423 | out: | |
3424 | kvm_exit_debug(); | |
b5a33a75 AK |
3425 | kvm_mmu_module_exit(); |
3426 | out4: | |
6aa8b732 AK |
3427 | return r; |
3428 | } | |
3429 | ||
3430 | static __exit void kvm_exit(void) | |
3431 | { | |
3432 | kvm_exit_debug(); | |
3433 | __free_page(pfn_to_page(bad_page_address >> PAGE_SHIFT)); | |
b5a33a75 | 3434 | kvm_mmu_module_exit(); |
6aa8b732 AK |
3435 | } |
3436 | ||
3437 | module_init(kvm_init) | |
3438 | module_exit(kvm_exit) | |
3439 | ||
3440 | EXPORT_SYMBOL_GPL(kvm_init_arch); | |
3441 | EXPORT_SYMBOL_GPL(kvm_exit_arch); |