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KVM: VMX: Further reduce efer reloads
[net-next-2.6.git] / drivers / kvm / kvm_main.c
CommitLineData
6aa8b732
AK		 1/*
2 * Kernel-based Virtual Machine driver for Linux
3 *
4 * This module enables machines with Intel VT-x extensions to run virtual
5 * machines without emulation or binary translation.
6 *
7 * Copyright (C) 2006 Qumranet, Inc.
8 *
9 * Authors:
10 * Avi Kivity <avi@qumranet.com>
11 * Yaniv Kamay <yaniv@qumranet.com>
12 *
13 * This work is licensed under the terms of the GNU GPL, version 2. See
14 * the COPYING file in the top-level directory.
15 *
16 */
17
18#include "kvm.h"
e495606d
AK		 19#include "x86_emulate.h"
20#include "segment_descriptor.h"
85f455f7 21#include "irq.h"
6aa8b732
AK		 22
23#include <linux/kvm.h>
24#include <linux/module.h>
25#include <linux/errno.h>
6aa8b732
AK		 26#include <linux/percpu.h>
27#include <linux/gfp.h>
6aa8b732
AK		 28#include <linux/mm.h>
29#include <linux/miscdevice.h>
30#include <linux/vmalloc.h>
6aa8b732 31#include <linux/reboot.h>
6aa8b732
AK		 32#include <linux/debugfs.h>
33#include <linux/highmem.h>
34#include <linux/file.h>
59ae6c6b 35#include <linux/sysdev.h>
774c47f1 36#include <linux/cpu.h>
e8edc6e0 37#include <linux/sched.h>
d9e368d6
AK		 38#include <linux/cpumask.h>
39#include <linux/smp.h>
d6d28168 40#include <linux/anon_inodes.h>
04d2cc77 41#include <linux/profile.h>
7aa81cc0 42#include <linux/kvm_para.h>
6aa8b732 43
e495606d
AK		 44#include <asm/processor.h>
45#include <asm/msr.h>
46#include <asm/io.h>
47#include <asm/uaccess.h>
48#include <asm/desc.h>
6aa8b732
AK		 49
50MODULE_AUTHOR("Qumranet");
51MODULE_LICENSE("GPL");
52
133de902
AK		 53static DEFINE_SPINLOCK(kvm_lock);
54static LIST_HEAD(vm_list);
55
1b6c0168
AK		 56static cpumask_t cpus_hardware_enabled;
57
cbdd1bea 58struct kvm_x86_ops *kvm_x86_ops;
c16f862d
RR		 59struct kmem_cache *kvm_vcpu_cache;
60EXPORT_SYMBOL_GPL(kvm_vcpu_cache);
1165f5fe 61
15ad7146
AK		 62static __read_mostly struct preempt_ops kvm_preempt_ops;
63
1165f5fe 64#define STAT_OFFSET(x) offsetof(struct kvm_vcpu, stat.x)
6aa8b732
AK		 65
66static struct kvm_stats_debugfs_item {
67 const char *name;
1165f5fe 68 int offset;
6aa8b732
AK		 69 struct dentry *dentry;
70} debugfs_entries[] = {
1165f5fe
AK		 71 { "pf_fixed", STAT_OFFSET(pf_fixed) },
72 { "pf_guest", STAT_OFFSET(pf_guest) },
73 { "tlb_flush", STAT_OFFSET(tlb_flush) },
74 { "invlpg", STAT_OFFSET(invlpg) },
75 { "exits", STAT_OFFSET(exits) },
76 { "io_exits", STAT_OFFSET(io_exits) },
77 { "mmio_exits", STAT_OFFSET(mmio_exits) },
78 { "signal_exits", STAT_OFFSET(signal_exits) },
79 { "irq_window", STAT_OFFSET(irq_window_exits) },
80 { "halt_exits", STAT_OFFSET(halt_exits) },
b6958ce4 81 { "halt_wakeup", STAT_OFFSET(halt_wakeup) },
1165f5fe
AK		 82 { "request_irq", STAT_OFFSET(request_irq_exits) },
83 { "irq_exits", STAT_OFFSET(irq_exits) },
e6adf283 84 { "light_exits", STAT_OFFSET(light_exits) },
2cc51560 85 { "efer_reload", STAT_OFFSET(efer_reload) },
1165f5fe 86 { NULL }
6aa8b732
AK		 87};
88
89static struct dentry *debugfs_dir;
90
91#define MAX_IO_MSRS 256
92
707d92fa
RR		 93#define CR0_RESERVED_BITS \
94 (~(unsigned long)(X86_CR0_PE | X86_CR0_MP | X86_CR0_EM | X86_CR0_TS \
95 | X86_CR0_ET | X86_CR0_NE | X86_CR0_WP | X86_CR0_AM \
96 | X86_CR0_NW | X86_CR0_CD | X86_CR0_PG))
66aee91a
RR		 97#define CR4_RESERVED_BITS \
98 (~(unsigned long)(X86_CR4_VME | X86_CR4_PVI | X86_CR4_TSD | X86_CR4_DE\
99 | X86_CR4_PSE | X86_CR4_PAE | X86_CR4_MCE \
100 | X86_CR4_PGE | X86_CR4_PCE | X86_CR4_OSFXSR \
101 | X86_CR4_OSXMMEXCPT | X86_CR4_VMXE))
102
7075bc81 103#define CR8_RESERVED_BITS (~(unsigned long)X86_CR8_TPR)
6aa8b732
AK		 104#define EFER_RESERVED_BITS 0xfffffffffffff2fe
105
05b3e0c2 106#ifdef CONFIG_X86_64
6aa8b732
AK		 107// LDT or TSS descriptor in the GDT. 16 bytes.
108struct segment_descriptor_64 {
109 struct segment_descriptor s;
110 u32 base_higher;
111 u32 pad_zero;
112};
113
114#endif
115
bccf2150
AK		 116static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl,
117 unsigned long arg);
118
6aa8b732
AK		 119unsigned long segment_base(u16 selector)
120{
121 struct descriptor_table gdt;
122 struct segment_descriptor *d;
123 unsigned long table_base;
124 typedef unsigned long ul;
125 unsigned long v;
126
127 if (selector == 0)
128 return 0;
129
130 asm ("sgdt %0" : "=m"(gdt));
131 table_base = gdt.base;
132
133 if (selector & 4) { /* from ldt */
134 u16 ldt_selector;
135
136 asm ("sldt %0" : "=g"(ldt_selector));
137 table_base = segment_base(ldt_selector);
138 }
139 d = (struct segment_descriptor *)(table_base + (selector & ~7));
140 v = d->base_low | ((ul)d->base_mid << 16) | ((ul)d->base_high << 24);
05b3e0c2 141#ifdef CONFIG_X86_64
6aa8b732
AK		 142 if (d->system == 0
143 && (d->type == 2 || d->type == 9 || d->type == 11))
144 v |= ((ul)((struct segment_descriptor_64 *)d)->base_higher) << 32;
145#endif
146 return v;
147}
148EXPORT_SYMBOL_GPL(segment_base);
149
5aacf0ca
JM		 150static inline int valid_vcpu(int n)
151{
152 return likely(n >= 0 && n < KVM_MAX_VCPUS);
153}
154
7702fd1f
AK		 155void kvm_load_guest_fpu(struct kvm_vcpu *vcpu)
156{
157 if (!vcpu->fpu_active || vcpu->guest_fpu_loaded)
158 return;
159
160 vcpu->guest_fpu_loaded = 1;
b114b080
RR		 161 fx_save(&vcpu->host_fx_image);
162 fx_restore(&vcpu->guest_fx_image);
7702fd1f
AK		 163}
164EXPORT_SYMBOL_GPL(kvm_load_guest_fpu);
165
166void kvm_put_guest_fpu(struct kvm_vcpu *vcpu)
167{
168 if (!vcpu->guest_fpu_loaded)
169 return;
170
171 vcpu->guest_fpu_loaded = 0;
b114b080
RR		 172 fx_save(&vcpu->guest_fx_image);
173 fx_restore(&vcpu->host_fx_image);
7702fd1f
AK		 174}
175EXPORT_SYMBOL_GPL(kvm_put_guest_fpu);
176
bccf2150
AK		 177/*
178 * Switches to specified vcpu, until a matching vcpu_put()
179 */
180static void vcpu_load(struct kvm_vcpu *vcpu)
6aa8b732 181{
15ad7146
AK		 182 int cpu;
183
bccf2150 184 mutex_lock(&vcpu->mutex);
15ad7146
AK		 185 cpu = get_cpu();
186 preempt_notifier_register(&vcpu->preempt_notifier);
cbdd1bea 187 kvm_x86_ops->vcpu_load(vcpu, cpu);
15ad7146 188 put_cpu();
6aa8b732
AK		 189}
190
6aa8b732
AK		 191static void vcpu_put(struct kvm_vcpu *vcpu)
192{
15ad7146 193 preempt_disable();
cbdd1bea 194 kvm_x86_ops->vcpu_put(vcpu);
15ad7146
AK		 195 preempt_notifier_unregister(&vcpu->preempt_notifier);
196 preempt_enable();
6aa8b732
AK		 197 mutex_unlock(&vcpu->mutex);
198}
199
d9e368d6
AK		 200static void ack_flush(void *_completed)
201{
d9e368d6
AK		 202}
203
204void kvm_flush_remote_tlbs(struct kvm *kvm)
205{
49d3bd7e 206 int i, cpu;
d9e368d6
AK		 207 cpumask_t cpus;
208 struct kvm_vcpu *vcpu;
d9e368d6 209
d9e368d6 210 cpus_clear(cpus);
fb3f0f51
RR		 211 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
212 vcpu = kvm->vcpus[i];
213 if (!vcpu)
214 continue;
d9e368d6
AK		 215 if (test_and_set_bit(KVM_TLB_FLUSH, &vcpu->requests))
216 continue;
217 cpu = vcpu->cpu;
218 if (cpu != -1 && cpu != raw_smp_processor_id())
49d3bd7e 219 cpu_set(cpu, cpus);
d9e368d6 220 }
49d3bd7e 221 smp_call_function_mask(cpus, ack_flush, NULL, 1);
d9e368d6
AK		 222}
223
fb3f0f51
RR		 224int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id)
225{
226 struct page *page;
227 int r;
228
229 mutex_init(&vcpu->mutex);
230 vcpu->cpu = -1;
231 vcpu->mmu.root_hpa = INVALID_PAGE;
232 vcpu->kvm = kvm;
233 vcpu->vcpu_id = id;
c5ec1534
HQ		 234 if (!irqchip_in_kernel(kvm) || id == 0)
235 vcpu->mp_state = VCPU_MP_STATE_RUNNABLE;
236 else
237 vcpu->mp_state = VCPU_MP_STATE_UNINITIALIZED;
b6958ce4 238 init_waitqueue_head(&vcpu->wq);
fb3f0f51
RR		 239
240 page = alloc_page(GFP_KERNEL | __GFP_ZERO);
241 if (!page) {
242 r = -ENOMEM;
243 goto fail;
244 }
245 vcpu->run = page_address(page);
246
247 page = alloc_page(GFP_KERNEL | __GFP_ZERO);
248 if (!page) {
249 r = -ENOMEM;
250 goto fail_free_run;
251 }
252 vcpu->pio_data = page_address(page);
253
fb3f0f51
RR		 254 r = kvm_mmu_create(vcpu);
255 if (r < 0)
256 goto fail_free_pio_data;
257
258 return 0;
259
260fail_free_pio_data:
261 free_page((unsigned long)vcpu->pio_data);
262fail_free_run:
263 free_page((unsigned long)vcpu->run);
264fail:
265 return -ENOMEM;
266}
267EXPORT_SYMBOL_GPL(kvm_vcpu_init);
268
269void kvm_vcpu_uninit(struct kvm_vcpu *vcpu)
270{
271 kvm_mmu_destroy(vcpu);
1b9778da
ED		 272 if (vcpu->apic)
273 hrtimer_cancel(&vcpu->apic->timer.dev);
97222cc8 274 kvm_free_apic(vcpu->apic);
fb3f0f51
RR		 275 free_page((unsigned long)vcpu->pio_data);
276 free_page((unsigned long)vcpu->run);
277}
278EXPORT_SYMBOL_GPL(kvm_vcpu_uninit);
279
f17abe9a 280static struct kvm *kvm_create_vm(void)
6aa8b732
AK		 281{
282 struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
6aa8b732
AK		 283
284 if (!kvm)
f17abe9a 285 return ERR_PTR(-ENOMEM);
6aa8b732 286
74906345 287 kvm_io_bus_init(&kvm->pio_bus);
11ec2804 288 mutex_init(&kvm->lock);
6aa8b732 289 INIT_LIST_HEAD(&kvm->active_mmu_pages);
2eeb2e94 290 kvm_io_bus_init(&kvm->mmio_bus);
5e58cfe4
RR		 291 spin_lock(&kvm_lock);
292 list_add(&kvm->vm_list, &vm_list);
293 spin_unlock(&kvm_lock);
f17abe9a
AK		 294 return kvm;
295}
296
6aa8b732
AK		 297/*
298 * Free any memory in @free but not in @dont.
299 */
300static void kvm_free_physmem_slot(struct kvm_memory_slot *free,
301 struct kvm_memory_slot *dont)
302{
303 int i;
304
305 if (!dont || free->phys_mem != dont->phys_mem)
306 if (free->phys_mem) {
307 for (i = 0; i < free->npages; ++i)
55a54f79
AK		 308 if (free->phys_mem[i])
309 __free_page(free->phys_mem[i]);
6aa8b732
AK		 310 vfree(free->phys_mem);
311 }
312
313 if (!dont || free->dirty_bitmap != dont->dirty_bitmap)
314 vfree(free->dirty_bitmap);
315
8b6d44c7 316 free->phys_mem = NULL;
6aa8b732 317 free->npages = 0;
8b6d44c7 318 free->dirty_bitmap = NULL;
6aa8b732
AK		 319}
320
321static void kvm_free_physmem(struct kvm *kvm)
322{
323 int i;
324
325 for (i = 0; i < kvm->nmemslots; ++i)
8b6d44c7 326 kvm_free_physmem_slot(&kvm->memslots[i], NULL);
6aa8b732
AK		 327}
328
039576c0
AK		 329static void free_pio_guest_pages(struct kvm_vcpu *vcpu)
330{
331 int i;
332
3077c451 333 for (i = 0; i < ARRAY_SIZE(vcpu->pio.guest_pages); ++i)
039576c0
AK		 334 if (vcpu->pio.guest_pages[i]) {
335 __free_page(vcpu->pio.guest_pages[i]);
336 vcpu->pio.guest_pages[i] = NULL;
337 }
338}
339
7b53aa56
AK		 340static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu)
341{
7b53aa56
AK		 342 vcpu_load(vcpu);
343 kvm_mmu_unload(vcpu);
344 vcpu_put(vcpu);
345}
346
6aa8b732
AK		 347static void kvm_free_vcpus(struct kvm *kvm)
348{
349 unsigned int i;
350
7b53aa56
AK		 351 /*
352 * Unpin any mmu pages first.
353 */
354 for (i = 0; i < KVM_MAX_VCPUS; ++i)
fb3f0f51
RR		 355 if (kvm->vcpus[i])
356 kvm_unload_vcpu_mmu(kvm->vcpus[i]);
357 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
358 if (kvm->vcpus[i]) {
cbdd1bea 359 kvm_x86_ops->vcpu_free(kvm->vcpus[i]);
fb3f0f51
RR		 360 kvm->vcpus[i] = NULL;
361 }
362 }
363
6aa8b732
AK		 364}
365
f17abe9a
AK		 366static void kvm_destroy_vm(struct kvm *kvm)
367{
133de902
AK		 368 spin_lock(&kvm_lock);
369 list_del(&kvm->vm_list);
370 spin_unlock(&kvm_lock);
74906345 371 kvm_io_bus_destroy(&kvm->pio_bus);
2eeb2e94 372 kvm_io_bus_destroy(&kvm->mmio_bus);
85f455f7 373 kfree(kvm->vpic);
1fd4f2a5 374 kfree(kvm->vioapic);
6aa8b732
AK		 375 kvm_free_vcpus(kvm);
376 kvm_free_physmem(kvm);
377 kfree(kvm);
f17abe9a
AK		 378}
379
380static int kvm_vm_release(struct inode *inode, struct file *filp)
381{
382 struct kvm *kvm = filp->private_data;
383
384 kvm_destroy_vm(kvm);
6aa8b732
AK		 385 return 0;
386}
387
388static void inject_gp(struct kvm_vcpu *vcpu)
389{
cbdd1bea 390 kvm_x86_ops->inject_gp(vcpu, 0);
6aa8b732
AK		 391}
392
1342d353
AK		 393/*
394 * Load the pae pdptrs. Return true is they are all valid.
395 */
396static int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3)
6aa8b732
AK		 397{
398 gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT;
1342d353 399 unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2;
6aa8b732 400 int i;
6aa8b732 401 u64 *pdpt;
1342d353 402 int ret;
954bbbc2 403 struct page *page;
c820c2aa 404 u64 pdpte[ARRAY_SIZE(vcpu->pdptrs)];
6aa8b732 405
11ec2804 406 mutex_lock(&vcpu->kvm->lock);
954bbbc2 407 page = gfn_to_page(vcpu->kvm, pdpt_gfn);
c820c2aa
RR		 408 if (!page) {
409 ret = 0;
410 goto out;
411 }
412
954bbbc2 413 pdpt = kmap_atomic(page, KM_USER0);
c820c2aa
RR		 414 memcpy(pdpte, pdpt+offset, sizeof(pdpte));
415 kunmap_atomic(pdpt, KM_USER0);
6aa8b732 416
c820c2aa
RR		 417 for (i = 0; i < ARRAY_SIZE(pdpte); ++i) {
418 if ((pdpte[i] & 1) && (pdpte[i] & 0xfffffff0000001e6ull)) {
1342d353
AK		 419 ret = 0;
420 goto out;
421 }
6aa8b732 422 }
c820c2aa 423 ret = 1;
6aa8b732 424
c820c2aa 425 memcpy(vcpu->pdptrs, pdpte, sizeof(vcpu->pdptrs));
1342d353 426out:
11ec2804 427 mutex_unlock(&vcpu->kvm->lock);
6aa8b732 428
1342d353 429 return ret;
6aa8b732
AK		 430}
431
432void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
433{
707d92fa 434 if (cr0 & CR0_RESERVED_BITS) {
6aa8b732
AK		 435 printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n",
436 cr0, vcpu->cr0);
437 inject_gp(vcpu);
438 return;
439 }
440
707d92fa 441 if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) {
6aa8b732
AK		 442 printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n");
443 inject_gp(vcpu);
444 return;
445 }
446
707d92fa 447 if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) {
6aa8b732
AK		 448 printk(KERN_DEBUG "set_cr0: #GP, set PG flag "
449 "and a clear PE flag\n");
450 inject_gp(vcpu);
451 return;
452 }
453
707d92fa 454 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
05b3e0c2 455#ifdef CONFIG_X86_64
6aa8b732
AK		 456 if ((vcpu->shadow_efer & EFER_LME)) {
457 int cs_db, cs_l;
458
459 if (!is_pae(vcpu)) {
460 printk(KERN_DEBUG "set_cr0: #GP, start paging "
461 "in long mode while PAE is disabled\n");
462 inject_gp(vcpu);
463 return;
464 }
cbdd1bea 465 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
6aa8b732
AK		 466 if (cs_l) {
467 printk(KERN_DEBUG "set_cr0: #GP, start paging "
468 "in long mode while CS.L == 1\n");
469 inject_gp(vcpu);
470 return;
471
472 }
473 } else
474#endif
1342d353 475 if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->cr3)) {
6aa8b732
AK		 476 printk(KERN_DEBUG "set_cr0: #GP, pdptrs "
477 "reserved bits\n");
478 inject_gp(vcpu);
479 return;
480 }
481
482 }
483
cbdd1bea 484 kvm_x86_ops->set_cr0(vcpu, cr0);
6aa8b732
AK		 485 vcpu->cr0 = cr0;
486
11ec2804 487 mutex_lock(&vcpu->kvm->lock);
6aa8b732 488 kvm_mmu_reset_context(vcpu);
11ec2804 489 mutex_unlock(&vcpu->kvm->lock);
6aa8b732
AK		 490 return;
491}
492EXPORT_SYMBOL_GPL(set_cr0);
493
494void lmsw(struct kvm_vcpu *vcpu, unsigned long msw)
495{
496 set_cr0(vcpu, (vcpu->cr0 & ~0x0ful) | (msw & 0x0f));
497}
498EXPORT_SYMBOL_GPL(lmsw);
499
500void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
501{
66aee91a 502 if (cr4 & CR4_RESERVED_BITS) {
6aa8b732
AK		 503 printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n");
504 inject_gp(vcpu);
505 return;
506 }
507
a9058ecd 508 if (is_long_mode(vcpu)) {
66aee91a 509 if (!(cr4 & X86_CR4_PAE)) {
6aa8b732
AK		 510 printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while "
511 "in long mode\n");
512 inject_gp(vcpu);
513 return;
514 }
66aee91a 515 } else if (is_paging(vcpu) && !is_pae(vcpu) && (cr4 & X86_CR4_PAE)
1342d353 516 && !load_pdptrs(vcpu, vcpu->cr3)) {
6aa8b732
AK		 517 printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n");
518 inject_gp(vcpu);
310bc76c 519 return;
6aa8b732
AK		 520 }
521
66aee91a 522 if (cr4 & X86_CR4_VMXE) {
6aa8b732
AK		 523 printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n");
524 inject_gp(vcpu);
525 return;
526 }
cbdd1bea 527 kvm_x86_ops->set_cr4(vcpu, cr4);
81f50e3b 528 vcpu->cr4 = cr4;
11ec2804 529 mutex_lock(&vcpu->kvm->lock);
6aa8b732 530 kvm_mmu_reset_context(vcpu);
11ec2804 531 mutex_unlock(&vcpu->kvm->lock);
6aa8b732
AK		 532}
533EXPORT_SYMBOL_GPL(set_cr4);
534
535void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
536{
a9058ecd 537 if (is_long_mode(vcpu)) {
f802a307 538 if (cr3 & CR3_L_MODE_RESERVED_BITS) {
6aa8b732
AK		 539 printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n");
540 inject_gp(vcpu);
541 return;
542 }
543 } else {
f802a307
RR		 544 if (is_pae(vcpu)) {
545 if (cr3 & CR3_PAE_RESERVED_BITS) {
546 printk(KERN_DEBUG
547 "set_cr3: #GP, reserved bits\n");
548 inject_gp(vcpu);
549 return;
550 }
551 if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) {
552 printk(KERN_DEBUG "set_cr3: #GP, pdptrs "
553 "reserved bits\n");
554 inject_gp(vcpu);
555 return;
556 }
557 } else {
558 if (cr3 & CR3_NONPAE_RESERVED_BITS) {
559 printk(KERN_DEBUG
560 "set_cr3: #GP, reserved bits\n");
561 inject_gp(vcpu);
562 return;
563 }
6aa8b732
AK		 564 }
565 }
566
11ec2804 567 mutex_lock(&vcpu->kvm->lock);
d21225ee
IM		 568 /*
569 * Does the new cr3 value map to physical memory? (Note, we
570 * catch an invalid cr3 even in real-mode, because it would
571 * cause trouble later on when we turn on paging anyway.)
572 *
573 * A real CPU would silently accept an invalid cr3 and would
574 * attempt to use it - with largely undefined (and often hard
575 * to debug) behavior on the guest side.
576 */
577 if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT)))
578 inject_gp(vcpu);
fb764416
RR		 579 else {
580 vcpu->cr3 = cr3;
d21225ee 581 vcpu->mmu.new_cr3(vcpu);
fb764416 582 }
11ec2804 583 mutex_unlock(&vcpu->kvm->lock);
6aa8b732
AK		 584}
585EXPORT_SYMBOL_GPL(set_cr3);
586
587void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8)
588{
7075bc81 589 if (cr8 & CR8_RESERVED_BITS) {
6aa8b732
AK		 590 printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8);
591 inject_gp(vcpu);
592 return;
593 }
97222cc8
ED		 594 if (irqchip_in_kernel(vcpu->kvm))
595 kvm_lapic_set_tpr(vcpu, cr8);
596 else
597 vcpu->cr8 = cr8;
6aa8b732
AK		 598}
599EXPORT_SYMBOL_GPL(set_cr8);
600
7017fc3d
ED		 601unsigned long get_cr8(struct kvm_vcpu *vcpu)
602{
97222cc8
ED		 603 if (irqchip_in_kernel(vcpu->kvm))
604 return kvm_lapic_get_cr8(vcpu);
605 else
606 return vcpu->cr8;
7017fc3d
ED		 607}
608EXPORT_SYMBOL_GPL(get_cr8);
609
610u64 kvm_get_apic_base(struct kvm_vcpu *vcpu)
611{
97222cc8
ED		 612 if (irqchip_in_kernel(vcpu->kvm))
613 return vcpu->apic_base;
614 else
615 return vcpu->apic_base;
7017fc3d
ED		 616}
617EXPORT_SYMBOL_GPL(kvm_get_apic_base);
618
619void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data)
620{
97222cc8
ED		 621 /* TODO: reserve bits check */
622 if (irqchip_in_kernel(vcpu->kvm))
623 kvm_lapic_set_base(vcpu, data);
624 else
625 vcpu->apic_base = data;
7017fc3d
ED		 626}
627EXPORT_SYMBOL_GPL(kvm_set_apic_base);
628
6aa8b732
AK		 629void fx_init(struct kvm_vcpu *vcpu)
630{
b114b080 631 unsigned after_mxcsr_mask;
6aa8b732 632
9bd01506
RR		 633 /* Initialize guest FPU by resetting ours and saving into guest's */
634 preempt_disable();
b114b080 635 fx_save(&vcpu->host_fx_image);
6aa8b732 636 fpu_init();
b114b080
RR		 637 fx_save(&vcpu->guest_fx_image);
638 fx_restore(&vcpu->host_fx_image);
9bd01506 639 preempt_enable();
6aa8b732 640
380102c8 641 vcpu->cr0 |= X86_CR0_ET;
b114b080
RR		 642 after_mxcsr_mask = offsetof(struct i387_fxsave_struct, st_space);
643 vcpu->guest_fx_image.mxcsr = 0x1f80;
644 memset((void *)&vcpu->guest_fx_image + after_mxcsr_mask,
645 0, sizeof(struct i387_fxsave_struct) - after_mxcsr_mask);
6aa8b732
AK		 646}
647EXPORT_SYMBOL_GPL(fx_init);
648
6aa8b732
AK		 649/*
650 * Allocate some memory and give it an address in the guest physical address
651 * space.
652 *
653 * Discontiguous memory is allowed, mostly for framebuffers.
654 */
2c6f5df9
AK		 655static int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
656 struct kvm_memory_region *mem)
6aa8b732
AK		 657{
658 int r;
659 gfn_t base_gfn;
660 unsigned long npages;
661 unsigned long i;
662 struct kvm_memory_slot *memslot;
663 struct kvm_memory_slot old, new;
6aa8b732
AK		 664
665 r = -EINVAL;
666 /* General sanity checks */
667 if (mem->memory_size & (PAGE_SIZE - 1))
668 goto out;
669 if (mem->guest_phys_addr & (PAGE_SIZE - 1))
670 goto out;
671 if (mem->slot >= KVM_MEMORY_SLOTS)
672 goto out;
673 if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr)
674 goto out;
675
676 memslot = &kvm->memslots[mem->slot];
677 base_gfn = mem->guest_phys_addr >> PAGE_SHIFT;
678 npages = mem->memory_size >> PAGE_SHIFT;
679
680 if (!npages)
681 mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES;
682
11ec2804 683 mutex_lock(&kvm->lock);
6aa8b732 684
6aa8b732
AK		 685 new = old = *memslot;
686
687 new.base_gfn = base_gfn;
688 new.npages = npages;
689 new.flags = mem->flags;
690
691 /* Disallow changing a memory slot's size. */
692 r = -EINVAL;
693 if (npages && old.npages && npages != old.npages)
694 goto out_unlock;
695
696 /* Check for overlaps */
697 r = -EEXIST;
698 for (i = 0; i < KVM_MEMORY_SLOTS; ++i) {
699 struct kvm_memory_slot *s = &kvm->memslots[i];
700
701 if (s == memslot)
702 continue;
703 if (!((base_gfn + npages <= s->base_gfn) ||
704 (base_gfn >= s->base_gfn + s->npages)))
705 goto out_unlock;
706 }
6aa8b732
AK		 707
708 /* Deallocate if slot is being removed */
709 if (!npages)
8b6d44c7 710 new.phys_mem = NULL;
6aa8b732
AK		 711
712 /* Free page dirty bitmap if unneeded */
713 if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES))
8b6d44c7 714 new.dirty_bitmap = NULL;
6aa8b732
AK		 715
716 r = -ENOMEM;
717
718 /* Allocate if a slot is being created */
719 if (npages && !new.phys_mem) {
720 new.phys_mem = vmalloc(npages * sizeof(struct page *));
721
722 if (!new.phys_mem)
0d8d2bd4 723 goto out_unlock;
6aa8b732
AK		 724
725 memset(new.phys_mem, 0, npages * sizeof(struct page *));
726 for (i = 0; i < npages; ++i) {
727 new.phys_mem[i] = alloc_page(GFP_HIGHUSER
728 | __GFP_ZERO);
729 if (!new.phys_mem[i])
0d8d2bd4 730 goto out_unlock;
5972e953 731 set_page_private(new.phys_mem[i],0);
6aa8b732
AK		 732 }
733 }
734
735 /* Allocate page dirty bitmap if needed */
736 if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) {
737 unsigned dirty_bytes = ALIGN(npages, BITS_PER_LONG) / 8;
738
739 new.dirty_bitmap = vmalloc(dirty_bytes);
740 if (!new.dirty_bitmap)
0d8d2bd4 741 goto out_unlock;
6aa8b732
AK		 742 memset(new.dirty_bitmap, 0, dirty_bytes);
743 }
744
6aa8b732
AK		 745 if (mem->slot >= kvm->nmemslots)
746 kvm->nmemslots = mem->slot + 1;
747
748 *memslot = new;
6aa8b732 749
90cb0529
AK		 750 kvm_mmu_slot_remove_write_access(kvm, mem->slot);
751 kvm_flush_remote_tlbs(kvm);
6aa8b732 752
11ec2804 753 mutex_unlock(&kvm->lock);
6aa8b732
AK		 754
755 kvm_free_physmem_slot(&old, &new);
756 return 0;
757
758out_unlock:
11ec2804 759 mutex_unlock(&kvm->lock);
6aa8b732
AK		 760 kvm_free_physmem_slot(&new, &old);
761out:
762 return r;
763}
764
765/*
766 * Get (and clear) the dirty memory log for a memory slot.
767 */
2c6f5df9
AK		 768static int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
769 struct kvm_dirty_log *log)
6aa8b732
AK		 770{
771 struct kvm_memory_slot *memslot;
772 int r, i;
773 int n;
774 unsigned long any = 0;
775
11ec2804 776 mutex_lock(&kvm->lock);
6aa8b732 777
6aa8b732
AK		 778 r = -EINVAL;
779 if (log->slot >= KVM_MEMORY_SLOTS)
780 goto out;
781
782 memslot = &kvm->memslots[log->slot];
783 r = -ENOENT;
784 if (!memslot->dirty_bitmap)
785 goto out;
786
cd1a4a98 787 n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
6aa8b732 788
cd1a4a98 789 for (i = 0; !any && i < n/sizeof(long); ++i)
6aa8b732
AK		 790 any = memslot->dirty_bitmap[i];
791
792 r = -EFAULT;
793 if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n))
794 goto out;
795
39214915
RR		 796 /* If nothing is dirty, don't bother messing with page tables. */
797 if (any) {
39214915
RR		 798 kvm_mmu_slot_remove_write_access(kvm, log->slot);
799 kvm_flush_remote_tlbs(kvm);
800 memset(memslot->dirty_bitmap, 0, n);
39214915 801 }
6aa8b732
AK		 802
803 r = 0;
804
805out:
11ec2804 806 mutex_unlock(&kvm->lock);
6aa8b732
AK		 807 return r;
808}
809
e8207547
AK		 810/*
811 * Set a new alias region. Aliases map a portion of physical memory into
812 * another portion. This is useful for memory windows, for example the PC
813 * VGA region.
814 */
815static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm,
816 struct kvm_memory_alias *alias)
817{
818 int r, n;
819 struct kvm_mem_alias *p;
820
821 r = -EINVAL;
822 /* General sanity checks */
823 if (alias->memory_size & (PAGE_SIZE - 1))
824 goto out;
825 if (alias->guest_phys_addr & (PAGE_SIZE - 1))
826 goto out;
827 if (alias->slot >= KVM_ALIAS_SLOTS)
828 goto out;
829 if (alias->guest_phys_addr + alias->memory_size
830 < alias->guest_phys_addr)
831 goto out;
832 if (alias->target_phys_addr + alias->memory_size
833 < alias->target_phys_addr)
834 goto out;
835
11ec2804 836 mutex_lock(&kvm->lock);
e8207547
AK		 837
838 p = &kvm->aliases[alias->slot];
839 p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT;
840 p->npages = alias->memory_size >> PAGE_SHIFT;
841 p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT;
842
843 for (n = KVM_ALIAS_SLOTS; n > 0; --n)
844 if (kvm->aliases[n - 1].npages)
845 break;
846 kvm->naliases = n;
847
90cb0529 848 kvm_mmu_zap_all(kvm);
e8207547 849
11ec2804 850 mutex_unlock(&kvm->lock);
e8207547
AK		 851
852 return 0;
853
854out:
855 return r;
856}
857
6ceb9d79
HQ		 858static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
859{
860 int r;
861
862 r = 0;
863 switch (chip->chip_id) {
864 case KVM_IRQCHIP_PIC_MASTER:
865 memcpy (&chip->chip.pic,
866 &pic_irqchip(kvm)->pics[0],
867 sizeof(struct kvm_pic_state));
868 break;
869 case KVM_IRQCHIP_PIC_SLAVE:
870 memcpy (&chip->chip.pic,
871 &pic_irqchip(kvm)->pics[1],
872 sizeof(struct kvm_pic_state));
873 break;
6bf9e962
HQ		 874 case KVM_IRQCHIP_IOAPIC:
875 memcpy (&chip->chip.ioapic,
876 ioapic_irqchip(kvm),
877 sizeof(struct kvm_ioapic_state));
878 break;
6ceb9d79
HQ		 879 default:
880 r = -EINVAL;
881 break;
882 }
883 return r;
884}
885
886static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
887{
888 int r;
889
890 r = 0;
891 switch (chip->chip_id) {
892 case KVM_IRQCHIP_PIC_MASTER:
893 memcpy (&pic_irqchip(kvm)->pics[0],
894 &chip->chip.pic,
895 sizeof(struct kvm_pic_state));
896 break;
897 case KVM_IRQCHIP_PIC_SLAVE:
898 memcpy (&pic_irqchip(kvm)->pics[1],
899 &chip->chip.pic,
900 sizeof(struct kvm_pic_state));
901 break;
6bf9e962
HQ		 902 case KVM_IRQCHIP_IOAPIC:
903 memcpy (ioapic_irqchip(kvm),
904 &chip->chip.ioapic,
905 sizeof(struct kvm_ioapic_state));
906 break;
6ceb9d79
HQ		 907 default:
908 r = -EINVAL;
909 break;
910 }
911 kvm_pic_update_irq(pic_irqchip(kvm));
912 return r;
913}
914
e8207547
AK		 915static gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
916{
917 int i;
918 struct kvm_mem_alias *alias;
919
920 for (i = 0; i < kvm->naliases; ++i) {
921 alias = &kvm->aliases[i];
922 if (gfn >= alias->base_gfn
923 && gfn < alias->base_gfn + alias->npages)
924 return alias->target_gfn + gfn - alias->base_gfn;
925 }
926 return gfn;
927}
928
929static struct kvm_memory_slot *__gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
6aa8b732
AK		 930{
931 int i;
932
933 for (i = 0; i < kvm->nmemslots; ++i) {
934 struct kvm_memory_slot *memslot = &kvm->memslots[i];
935
936 if (gfn >= memslot->base_gfn
937 && gfn < memslot->base_gfn + memslot->npages)
938 return memslot;
939 }
8b6d44c7 940 return NULL;
6aa8b732 941}
e8207547
AK		 942
943struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
944{
945 gfn = unalias_gfn(kvm, gfn);
946 return __gfn_to_memslot(kvm, gfn);
947}
6aa8b732 948
954bbbc2
AK		 949struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn)
950{
951 struct kvm_memory_slot *slot;
952
e8207547
AK		 953 gfn = unalias_gfn(kvm, gfn);
954 slot = __gfn_to_memslot(kvm, gfn);
954bbbc2
AK		 955 if (!slot)
956 return NULL;
957 return slot->phys_mem[gfn - slot->base_gfn];
958}
959EXPORT_SYMBOL_GPL(gfn_to_page);
960
7e9d619d 961/* WARNING: Does not work on aliased pages. */
6aa8b732
AK		 962void mark_page_dirty(struct kvm *kvm, gfn_t gfn)
963{
31389947 964 struct kvm_memory_slot *memslot;
6aa8b732 965
7e9d619d
RR		 966 memslot = __gfn_to_memslot(kvm, gfn);
967 if (memslot && memslot->dirty_bitmap) {
968 unsigned long rel_gfn = gfn - memslot->base_gfn;
6aa8b732 969
7e9d619d
RR		 970 /* avoid RMW */
971 if (!test_bit(rel_gfn, memslot->dirty_bitmap))
972 set_bit(rel_gfn, memslot->dirty_bitmap);
6aa8b732
AK		 973 }
974}
975
e7d5d76c 976int emulator_read_std(unsigned long addr,
4c690a1e 977 void *val,
6aa8b732 978 unsigned int bytes,
cebff02b 979 struct kvm_vcpu *vcpu)
6aa8b732 980{
6aa8b732
AK		 981 void *data = val;
982
983 while (bytes) {
984 gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
985 unsigned offset = addr & (PAGE_SIZE-1);
986 unsigned tocopy = min(bytes, (unsigned)PAGE_SIZE - offset);
987 unsigned long pfn;
954bbbc2
AK		 988 struct page *page;
989 void *page_virt;
6aa8b732
AK		 990
991 if (gpa == UNMAPPED_GVA)
992 return X86EMUL_PROPAGATE_FAULT;
993 pfn = gpa >> PAGE_SHIFT;
954bbbc2
AK		 994 page = gfn_to_page(vcpu->kvm, pfn);
995 if (!page)
6aa8b732 996 return X86EMUL_UNHANDLEABLE;
954bbbc2 997 page_virt = kmap_atomic(page, KM_USER0);
6aa8b732 998
954bbbc2 999 memcpy(data, page_virt + offset, tocopy);
6aa8b732 1000
954bbbc2 1001 kunmap_atomic(page_virt, KM_USER0);
6aa8b732
AK		 1002
1003 bytes -= tocopy;
1004 data += tocopy;
1005 addr += tocopy;
1006 }
1007
1008 return X86EMUL_CONTINUE;
1009}
e7d5d76c 1010EXPORT_SYMBOL_GPL(emulator_read_std);
6aa8b732
AK		 1011
1012static int emulator_write_std(unsigned long addr,
4c690a1e 1013 const void *val,
6aa8b732 1014 unsigned int bytes,
cebff02b 1015 struct kvm_vcpu *vcpu)
6aa8b732 1016{
f0242478 1017 pr_unimpl(vcpu, "emulator_write_std: addr %lx n %d\n", addr, bytes);
6aa8b732
AK		 1018 return X86EMUL_UNHANDLEABLE;
1019}
1020
97222cc8
ED		 1021/*
1022 * Only apic need an MMIO device hook, so shortcut now..
1023 */
1024static struct kvm_io_device *vcpu_find_pervcpu_dev(struct kvm_vcpu *vcpu,
1025 gpa_t addr)
1026{
1027 struct kvm_io_device *dev;
1028
1029 if (vcpu->apic) {
1030 dev = &vcpu->apic->dev;
1031 if (dev->in_range(dev, addr))
1032 return dev;
1033 }
1034 return NULL;
1035}
1036
2eeb2e94
GH		 1037static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu,
1038 gpa_t addr)
1039{
97222cc8
ED		 1040 struct kvm_io_device *dev;
1041
1042 dev = vcpu_find_pervcpu_dev(vcpu, addr);
1043 if (dev == NULL)
1044 dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr);
1045 return dev;
2eeb2e94
GH		 1046}
1047
74906345
ED		 1048static struct kvm_io_device *vcpu_find_pio_dev(struct kvm_vcpu *vcpu,
1049 gpa_t addr)
1050{
1051 return kvm_io_bus_find_dev(&vcpu->kvm->pio_bus, addr);
1052}
1053
6aa8b732 1054static int emulator_read_emulated(unsigned long addr,
4c690a1e 1055 void *val,
6aa8b732 1056 unsigned int bytes,
cebff02b 1057 struct kvm_vcpu *vcpu)
6aa8b732 1058{
2eeb2e94
GH		 1059 struct kvm_io_device *mmio_dev;
1060 gpa_t gpa;
6aa8b732
AK		 1061
1062 if (vcpu->mmio_read_completed) {
1063 memcpy(val, vcpu->mmio_data, bytes);
1064 vcpu->mmio_read_completed = 0;
1065 return X86EMUL_CONTINUE;
cebff02b 1066 } else if (emulator_read_std(addr, val, bytes, vcpu)
6aa8b732
AK		 1067 == X86EMUL_CONTINUE)
1068 return X86EMUL_CONTINUE;
d27d4aca 1069
2eeb2e94
GH		 1070 gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
1071 if (gpa == UNMAPPED_GVA)
1072 return X86EMUL_PROPAGATE_FAULT;
6aa8b732 1073
2eeb2e94
GH		 1074 /*
1075 * Is this MMIO handled locally?
1076 */
1077 mmio_dev = vcpu_find_mmio_dev(vcpu, gpa);
1078 if (mmio_dev) {
1079 kvm_iodevice_read(mmio_dev, gpa, bytes, val);
1080 return X86EMUL_CONTINUE;
6aa8b732 1081 }
2eeb2e94
GH		 1082
1083 vcpu->mmio_needed = 1;
1084 vcpu->mmio_phys_addr = gpa;
1085 vcpu->mmio_size = bytes;
1086 vcpu->mmio_is_write = 0;
1087
1088 return X86EMUL_UNHANDLEABLE;
6aa8b732
AK		 1089}
1090
da4a00f0 1091static int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
4c690a1e 1092 const void *val, int bytes)
da4a00f0 1093{
da4a00f0
AK		 1094 struct page *page;
1095 void *virt;
1096
1097 if (((gpa + bytes - 1) >> PAGE_SHIFT) != (gpa >> PAGE_SHIFT))
1098 return 0;
954bbbc2
AK		 1099 page = gfn_to_page(vcpu->kvm, gpa >> PAGE_SHIFT);
1100 if (!page)
da4a00f0 1101 return 0;
ab51a434 1102 mark_page_dirty(vcpu->kvm, gpa >> PAGE_SHIFT);
da4a00f0 1103 virt = kmap_atomic(page, KM_USER0);
fe551881 1104 kvm_mmu_pte_write(vcpu, gpa, val, bytes);
7cfa4b0a 1105 memcpy(virt + offset_in_page(gpa), val, bytes);
da4a00f0 1106 kunmap_atomic(virt, KM_USER0);
da4a00f0
AK		 1107 return 1;
1108}
1109
b0fcd903
AK		 1110static int emulator_write_emulated_onepage(unsigned long addr,
1111 const void *val,
1112 unsigned int bytes,
cebff02b 1113 struct kvm_vcpu *vcpu)
6aa8b732 1114{
2eeb2e94
GH		 1115 struct kvm_io_device *mmio_dev;
1116 gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
6aa8b732 1117
c9047f53 1118 if (gpa == UNMAPPED_GVA) {
cbdd1bea 1119 kvm_x86_ops->inject_page_fault(vcpu, addr, 2);
6aa8b732 1120 return X86EMUL_PROPAGATE_FAULT;
c9047f53 1121 }
6aa8b732 1122
da4a00f0
AK		 1123 if (emulator_write_phys(vcpu, gpa, val, bytes))
1124 return X86EMUL_CONTINUE;
1125
2eeb2e94
GH		 1126 /*
1127 * Is this MMIO handled locally?
1128 */
1129 mmio_dev = vcpu_find_mmio_dev(vcpu, gpa);
1130 if (mmio_dev) {
1131 kvm_iodevice_write(mmio_dev, gpa, bytes, val);
1132 return X86EMUL_CONTINUE;
1133 }
1134
6aa8b732
AK		 1135 vcpu->mmio_needed = 1;
1136 vcpu->mmio_phys_addr = gpa;
1137 vcpu->mmio_size = bytes;
1138 vcpu->mmio_is_write = 1;
4c690a1e 1139 memcpy(vcpu->mmio_data, val, bytes);
6aa8b732
AK		 1140
1141 return X86EMUL_CONTINUE;
1142}
1143
e7d5d76c 1144int emulator_write_emulated(unsigned long addr,
b0fcd903
AK		 1145 const void *val,
1146 unsigned int bytes,
cebff02b 1147 struct kvm_vcpu *vcpu)
b0fcd903
AK		 1148{
1149 /* Crossing a page boundary? */
1150 if (((addr + bytes - 1) ^ addr) & PAGE_MASK) {
1151 int rc, now;
1152
1153 now = -addr & ~PAGE_MASK;
cebff02b 1154 rc = emulator_write_emulated_onepage(addr, val, now, vcpu);
b0fcd903
AK		 1155 if (rc != X86EMUL_CONTINUE)
1156 return rc;
1157 addr += now;
1158 val += now;
1159 bytes -= now;
1160 }
cebff02b 1161 return emulator_write_emulated_onepage(addr, val, bytes, vcpu);
b0fcd903 1162}
e7d5d76c 1163EXPORT_SYMBOL_GPL(emulator_write_emulated);
b0fcd903 1164
6aa8b732 1165static int emulator_cmpxchg_emulated(unsigned long addr,
4c690a1e
AK		 1166 const void *old,
1167 const void *new,
6aa8b732 1168 unsigned int bytes,
cebff02b 1169 struct kvm_vcpu *vcpu)
6aa8b732
AK		 1170{
1171 static int reported;
1172
1173 if (!reported) {
1174 reported = 1;
1175 printk(KERN_WARNING "kvm: emulating exchange as write\n");
1176 }
cebff02b 1177 return emulator_write_emulated(addr, new, bytes, vcpu);
6aa8b732
AK		 1178}
1179
1180static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg)
1181{
cbdd1bea 1182 return kvm_x86_ops->get_segment_base(vcpu, seg);
6aa8b732
AK		 1183}
1184
1185int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address)
1186{
6aa8b732
AK		 1187 return X86EMUL_CONTINUE;
1188}
1189
1190int emulate_clts(struct kvm_vcpu *vcpu)
1191{
404fb881 1192 kvm_x86_ops->set_cr0(vcpu, vcpu->cr0 & ~X86_CR0_TS);
6aa8b732
AK		 1193 return X86EMUL_CONTINUE;
1194}
1195
1196int emulator_get_dr(struct x86_emulate_ctxt* ctxt, int dr, unsigned long *dest)
1197{
1198 struct kvm_vcpu *vcpu = ctxt->vcpu;
1199
1200 switch (dr) {
1201 case 0 ... 3:
cbdd1bea 1202 *dest = kvm_x86_ops->get_dr(vcpu, dr);
6aa8b732
AK		 1203 return X86EMUL_CONTINUE;
1204 default:
f0242478 1205 pr_unimpl(vcpu, "%s: unexpected dr %u\n", __FUNCTION__, dr);
6aa8b732
AK		 1206 return X86EMUL_UNHANDLEABLE;
1207 }
1208}
1209
1210int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value)
1211{
1212 unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U;
1213 int exception;
1214
cbdd1bea 1215 kvm_x86_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception);
6aa8b732
AK		 1216 if (exception) {
1217 /* FIXME: better handling */
1218 return X86EMUL_UNHANDLEABLE;
1219 }
1220 return X86EMUL_CONTINUE;
1221}
1222
054b1369 1223void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context)
6aa8b732
AK		 1224{
1225 static int reported;
1226 u8 opcodes[4];
054b1369 1227 unsigned long rip = vcpu->rip;
6aa8b732
AK		 1228 unsigned long rip_linear;
1229
054b1369 1230 rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS);
6aa8b732
AK		 1231
1232 if (reported)
1233 return;
1234
054b1369 1235 emulator_read_std(rip_linear, (void *)opcodes, 4, vcpu);
6aa8b732 1236
054b1369
AK		 1237 printk(KERN_ERR "emulation failed (%s) rip %lx %02x %02x %02x %02x\n",
1238 context, rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]);
6aa8b732
AK		 1239 reported = 1;
1240}
054b1369 1241EXPORT_SYMBOL_GPL(kvm_report_emulation_failure);
6aa8b732
AK		 1242
1243struct x86_emulate_ops emulate_ops = {
1244 .read_std = emulator_read_std,
1245 .write_std = emulator_write_std,
1246 .read_emulated = emulator_read_emulated,
1247 .write_emulated = emulator_write_emulated,
1248 .cmpxchg_emulated = emulator_cmpxchg_emulated,
1249};
1250
1251int emulate_instruction(struct kvm_vcpu *vcpu,
1252 struct kvm_run *run,
1253 unsigned long cr2,
3427318f
LV		 1254 u16 error_code,
1255 int no_decode)
6aa8b732 1256{
3427318f 1257 int r = 0;
6aa8b732 1258
e7df56e4 1259 vcpu->mmio_fault_cr2 = cr2;
cbdd1bea 1260 kvm_x86_ops->cache_regs(vcpu);
6aa8b732 1261
6aa8b732 1262 vcpu->mmio_is_write = 0;
e70669ab 1263 vcpu->pio.string = 0;
3427318f
LV		 1264
1265 if (!no_decode) {
1266 int cs_db, cs_l;
1267 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
1268
1269 vcpu->emulate_ctxt.vcpu = vcpu;
1270 vcpu->emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu);
1271 vcpu->emulate_ctxt.cr2 = cr2;
1272 vcpu->emulate_ctxt.mode =
1273 (vcpu->emulate_ctxt.eflags & X86_EFLAGS_VM)
1274 ? X86EMUL_MODE_REAL : cs_l
1275 ? X86EMUL_MODE_PROT64 : cs_db
1276 ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16;
1277
1278 if (vcpu->emulate_ctxt.mode == X86EMUL_MODE_PROT64) {
1279 vcpu->emulate_ctxt.cs_base = 0;
1280 vcpu->emulate_ctxt.ds_base = 0;
1281 vcpu->emulate_ctxt.es_base = 0;
1282 vcpu->emulate_ctxt.ss_base = 0;
1283 } else {
1284 vcpu->emulate_ctxt.cs_base =
1285 get_segment_base(vcpu, VCPU_SREG_CS);
1286 vcpu->emulate_ctxt.ds_base =
1287 get_segment_base(vcpu, VCPU_SREG_DS);
1288 vcpu->emulate_ctxt.es_base =
1289 get_segment_base(vcpu, VCPU_SREG_ES);
1290 vcpu->emulate_ctxt.ss_base =
1291 get_segment_base(vcpu, VCPU_SREG_SS);
1292 }
1293
1294 vcpu->emulate_ctxt.gs_base =
1295 get_segment_base(vcpu, VCPU_SREG_GS);
1296 vcpu->emulate_ctxt.fs_base =
1297 get_segment_base(vcpu, VCPU_SREG_FS);
1298
1299 r = x86_decode_insn(&vcpu->emulate_ctxt, &emulate_ops);
1300 }
1301
1be3aa47 1302 if (r == 0)
3427318f 1303 r = x86_emulate_insn(&vcpu->emulate_ctxt, &emulate_ops);
1be3aa47 1304
e70669ab
LV		 1305 if (vcpu->pio.string)
1306 return EMULATE_DO_MMIO;
6aa8b732
AK		 1307
1308 if ((r || vcpu->mmio_is_write) && run) {
8fc0d085 1309 run->exit_reason = KVM_EXIT_MMIO;
6aa8b732
AK		 1310 run->mmio.phys_addr = vcpu->mmio_phys_addr;
1311 memcpy(run->mmio.data, vcpu->mmio_data, 8);
1312 run->mmio.len = vcpu->mmio_size;
1313 run->mmio.is_write = vcpu->mmio_is_write;
1314 }
1315
1316 if (r) {
a436036b
AK		 1317 if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
1318 return EMULATE_DONE;
6aa8b732 1319 if (!vcpu->mmio_needed) {
054b1369 1320 kvm_report_emulation_failure(vcpu, "mmio");
6aa8b732
AK		 1321 return EMULATE_FAIL;
1322 }
1323 return EMULATE_DO_MMIO;
1324 }
1325
cbdd1bea 1326 kvm_x86_ops->decache_regs(vcpu);
3427318f 1327 kvm_x86_ops->set_rflags(vcpu, vcpu->emulate_ctxt.eflags);
6aa8b732 1328
02c83209
AK		 1329 if (vcpu->mmio_is_write) {
1330 vcpu->mmio_needed = 0;
6aa8b732 1331 return EMULATE_DO_MMIO;
02c83209 1332 }
6aa8b732
AK		 1333
1334 return EMULATE_DONE;
1335}
1336EXPORT_SYMBOL_GPL(emulate_instruction);
1337
b6958ce4
ED		 1338/*
1339 * The vCPU has executed a HLT instruction with in-kernel mode enabled.
1340 */
c5ec1534 1341static void kvm_vcpu_block(struct kvm_vcpu *vcpu)
d3bef15f 1342{
b6958ce4
ED		 1343 DECLARE_WAITQUEUE(wait, current);
1344
1345 add_wait_queue(&vcpu->wq, &wait);
1346
1347 /*
1348 * We will block until either an interrupt or a signal wakes us up
1349 */
c5ec1534
HQ		 1350 while (!kvm_cpu_has_interrupt(vcpu)
1351 && !signal_pending(current)
1352 && vcpu->mp_state != VCPU_MP_STATE_RUNNABLE
1353 && vcpu->mp_state != VCPU_MP_STATE_SIPI_RECEIVED) {
b6958ce4
ED		 1354 set_current_state(TASK_INTERRUPTIBLE);
1355 vcpu_put(vcpu);
1356 schedule();
1357 vcpu_load(vcpu);
1358 }
d3bef15f 1359
c5ec1534 1360 __set_current_state(TASK_RUNNING);
b6958ce4 1361 remove_wait_queue(&vcpu->wq, &wait);
b6958ce4
ED		 1362}
1363
1364int kvm_emulate_halt(struct kvm_vcpu *vcpu)
1365{
d3bef15f 1366 ++vcpu->stat.halt_exits;
b6958ce4 1367 if (irqchip_in_kernel(vcpu->kvm)) {
c5ec1534
HQ		 1368 vcpu->mp_state = VCPU_MP_STATE_HALTED;
1369 kvm_vcpu_block(vcpu);
1370 if (vcpu->mp_state != VCPU_MP_STATE_RUNNABLE)
1371 return -EINTR;
b6958ce4
ED		 1372 return 1;
1373 } else {
1374 vcpu->run->exit_reason = KVM_EXIT_HLT;
1375 return 0;
1376 }
d3bef15f
AK		 1377}
1378EXPORT_SYMBOL_GPL(kvm_emulate_halt);
1379
7aa81cc0 1380int kvm_emulate_hypercall(struct kvm_vcpu *vcpu)
270fd9b9 1381{
7aa81cc0 1382 unsigned long nr, a0, a1, a2, a3, ret;
270fd9b9 1383
cbdd1bea 1384 kvm_x86_ops->cache_regs(vcpu);
7aa81cc0
AL		 1385
1386 nr = vcpu->regs[VCPU_REGS_RAX];
1387 a0 = vcpu->regs[VCPU_REGS_RBX];
1388 a1 = vcpu->regs[VCPU_REGS_RCX];
1389 a2 = vcpu->regs[VCPU_REGS_RDX];
1390 a3 = vcpu->regs[VCPU_REGS_RSI];
1391
1392 if (!is_long_mode(vcpu)) {
1393 nr &= 0xFFFFFFFF;
1394 a0 &= 0xFFFFFFFF;
1395 a1 &= 0xFFFFFFFF;
1396 a2 &= 0xFFFFFFFF;
1397 a3 &= 0xFFFFFFFF;
270fd9b9 1398 }
7aa81cc0 1399
270fd9b9
AK		 1400 switch (nr) {
1401 default:
7aa81cc0
AL		 1402 ret = -KVM_ENOSYS;
1403 break;
270fd9b9
AK		 1404 }
1405 vcpu->regs[VCPU_REGS_RAX] = ret;
cbdd1bea 1406 kvm_x86_ops->decache_regs(vcpu);
7aa81cc0
AL		 1407 return 0;
1408}
1409EXPORT_SYMBOL_GPL(kvm_emulate_hypercall);
1410
1411int kvm_fix_hypercall(struct kvm_vcpu *vcpu)
1412{
1413 char instruction[3];
1414 int ret = 0;
1415
1416 mutex_lock(&vcpu->kvm->lock);
1417
1418 /*
1419 * Blow out the MMU to ensure that no other VCPU has an active mapping
1420 * to ensure that the updated hypercall appears atomically across all
1421 * VCPUs.
1422 */
1423 kvm_mmu_zap_all(vcpu->kvm);
1424
1425 kvm_x86_ops->cache_regs(vcpu);
1426 kvm_x86_ops->patch_hypercall(vcpu, instruction);
1427 if (emulator_write_emulated(vcpu->rip, instruction, 3, vcpu)
1428 != X86EMUL_CONTINUE)
1429 ret = -EFAULT;
1430
1431 mutex_unlock(&vcpu->kvm->lock);
1432
1433 return ret;
270fd9b9 1434}
270fd9b9 1435
6aa8b732
AK		 1436static u64 mk_cr_64(u64 curr_cr, u32 new_val)
1437{
1438 return (curr_cr & ~((1ULL << 32) - 1)) | new_val;
1439}
1440
1441void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
1442{
1443 struct descriptor_table dt = { limit, base };
1444
cbdd1bea 1445 kvm_x86_ops->set_gdt(vcpu, &dt);
6aa8b732
AK		 1446}
1447
1448void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
1449{
1450 struct descriptor_table dt = { limit, base };
1451
cbdd1bea 1452 kvm_x86_ops->set_idt(vcpu, &dt);
6aa8b732
AK		 1453}
1454
1455void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
1456 unsigned long *rflags)
1457{
1458 lmsw(vcpu, msw);
cbdd1bea 1459 *rflags = kvm_x86_ops->get_rflags(vcpu);
6aa8b732
AK		 1460}
1461
1462unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr)
1463{
cbdd1bea 1464 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
6aa8b732
AK		 1465 switch (cr) {
1466 case 0:
1467 return vcpu->cr0;
1468 case 2:
1469 return vcpu->cr2;
1470 case 3:
1471 return vcpu->cr3;
1472 case 4:
1473 return vcpu->cr4;
1474 default:
1475 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
1476 return 0;
1477 }
1478}
1479
1480void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val,
1481 unsigned long *rflags)
1482{
1483 switch (cr) {
1484 case 0:
1485 set_cr0(vcpu, mk_cr_64(vcpu->cr0, val));
cbdd1bea 1486 *rflags = kvm_x86_ops->get_rflags(vcpu);
6aa8b732
AK		 1487 break;
1488 case 2:
1489 vcpu->cr2 = val;
1490 break;
1491 case 3:
1492 set_cr3(vcpu, val);
1493 break;
1494 case 4:
1495 set_cr4(vcpu, mk_cr_64(vcpu->cr4, val));
1496 break;
1497 default:
1498 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
1499 }
1500}
1501
3bab1f5d
AK		 1502int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1503{
1504 u64 data;
1505
1506 switch (msr) {
1507 case 0xc0010010: /* SYSCFG */
1508 case 0xc0010015: /* HWCR */
1509 case MSR_IA32_PLATFORM_ID:
1510 case MSR_IA32_P5_MC_ADDR:
1511 case MSR_IA32_P5_MC_TYPE:
1512 case MSR_IA32_MC0_CTL:
1513 case MSR_IA32_MCG_STATUS:
1514 case MSR_IA32_MCG_CAP:
1515 case MSR_IA32_MC0_MISC:
1516 case MSR_IA32_MC0_MISC+4:
1517 case MSR_IA32_MC0_MISC+8:
1518 case MSR_IA32_MC0_MISC+12:
1519 case MSR_IA32_MC0_MISC+16:
1520 case MSR_IA32_UCODE_REV:
a8d13ea2 1521 case MSR_IA32_PERF_STATUS:
2dc7094b 1522 case MSR_IA32_EBL_CR_POWERON:
3bab1f5d
AK		 1523 /* MTRR registers */
1524 case 0xfe:
1525 case 0x200 ... 0x2ff:
1526 data = 0;
1527 break;
a8d13ea2
AK		 1528 case 0xcd: /* fsb frequency */
1529 data = 3;
1530 break;
3bab1f5d 1531 case MSR_IA32_APICBASE:
7017fc3d 1532 data = kvm_get_apic_base(vcpu);
3bab1f5d 1533 break;
6f00e68f
AK		 1534 case MSR_IA32_MISC_ENABLE:
1535 data = vcpu->ia32_misc_enable_msr;
1536 break;
3bab1f5d
AK		 1537#ifdef CONFIG_X86_64
1538 case MSR_EFER:
1539 data = vcpu->shadow_efer;
1540 break;
1541#endif
1542 default:
f0242478 1543 pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr);
3bab1f5d
AK		 1544 return 1;
1545 }
1546 *pdata = data;
1547 return 0;
1548}
1549EXPORT_SYMBOL_GPL(kvm_get_msr_common);
1550
6aa8b732
AK		 1551/*
1552 * Reads an msr value (of 'msr_index') into 'pdata'.
1553 * Returns 0 on success, non-0 otherwise.
1554 * Assumes vcpu_load() was already called.
1555 */
35f3f286 1556int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
6aa8b732 1557{
cbdd1bea 1558 return kvm_x86_ops->get_msr(vcpu, msr_index, pdata);
6aa8b732
AK		 1559}
1560
05b3e0c2 1561#ifdef CONFIG_X86_64
6aa8b732 1562
3bab1f5d 1563static void set_efer(struct kvm_vcpu *vcpu, u64 efer)
6aa8b732 1564{
6aa8b732
AK		 1565 if (efer & EFER_RESERVED_BITS) {
1566 printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n",
1567 efer);
1568 inject_gp(vcpu);
1569 return;
1570 }
1571
1572 if (is_paging(vcpu)
1573 && (vcpu->shadow_efer & EFER_LME) != (efer & EFER_LME)) {
1574 printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n");
1575 inject_gp(vcpu);
1576 return;
1577 }
1578
cbdd1bea 1579 kvm_x86_ops->set_efer(vcpu, efer);
7725f0ba 1580
6aa8b732
AK		 1581 efer &= ~EFER_LMA;
1582 efer |= vcpu->shadow_efer & EFER_LMA;
1583
1584 vcpu->shadow_efer = efer;
6aa8b732 1585}
6aa8b732
AK		 1586
1587#endif
1588
3bab1f5d
AK		 1589int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1590{
1591 switch (msr) {
1592#ifdef CONFIG_X86_64
1593 case MSR_EFER:
1594 set_efer(vcpu, data);
1595 break;
1596#endif
1597 case MSR_IA32_MC0_STATUS:
f0242478 1598 pr_unimpl(vcpu, "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n",
3bab1f5d
AK		 1599 __FUNCTION__, data);
1600 break;
0e5bf0d0 1601 case MSR_IA32_MCG_STATUS:
f0242478 1602 pr_unimpl(vcpu, "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n",
0e5bf0d0
SK		 1603 __FUNCTION__, data);
1604 break;
3bab1f5d
AK		 1605 case MSR_IA32_UCODE_REV:
1606 case MSR_IA32_UCODE_WRITE:
1607 case 0x200 ... 0x2ff: /* MTRRs */
1608 break;
1609 case MSR_IA32_APICBASE:
7017fc3d 1610 kvm_set_apic_base(vcpu, data);
3bab1f5d 1611 break;
6f00e68f
AK		 1612 case MSR_IA32_MISC_ENABLE:
1613 vcpu->ia32_misc_enable_msr = data;
1614 break;
3bab1f5d 1615 default:
f0242478 1616 pr_unimpl(vcpu, "unhandled wrmsr: 0x%x\n", msr);
3bab1f5d
AK		 1617 return 1;
1618 }
1619 return 0;
1620}
1621EXPORT_SYMBOL_GPL(kvm_set_msr_common);
1622
6aa8b732
AK		 1623/*
1624 * Writes msr value into into the appropriate "register".
1625 * Returns 0 on success, non-0 otherwise.
1626 * Assumes vcpu_load() was already called.
1627 */
35f3f286 1628int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
6aa8b732 1629{
cbdd1bea 1630 return kvm_x86_ops->set_msr(vcpu, msr_index, data);
6aa8b732
AK		 1631}
1632
1633void kvm_resched(struct kvm_vcpu *vcpu)
1634{
3fca0365
YD		 1635 if (!need_resched())
1636 return;
6aa8b732 1637 cond_resched();
6aa8b732
AK		 1638}
1639EXPORT_SYMBOL_GPL(kvm_resched);
1640
06465c5a
AK		 1641void kvm_emulate_cpuid(struct kvm_vcpu *vcpu)
1642{
1643 int i;
1644 u32 function;
1645 struct kvm_cpuid_entry *e, *best;
1646
cbdd1bea 1647 kvm_x86_ops->cache_regs(vcpu);
06465c5a
AK		 1648 function = vcpu->regs[VCPU_REGS_RAX];
1649 vcpu->regs[VCPU_REGS_RAX] = 0;
1650 vcpu->regs[VCPU_REGS_RBX] = 0;
1651 vcpu->regs[VCPU_REGS_RCX] = 0;
1652 vcpu->regs[VCPU_REGS_RDX] = 0;
1653 best = NULL;
1654 for (i = 0; i < vcpu->cpuid_nent; ++i) {
1655 e = &vcpu->cpuid_entries[i];
1656 if (e->function == function) {
1657 best = e;
1658 break;
1659 }
1660 /*
1661 * Both basic or both extended?
1662 */
1663 if (((e->function ^ function) & 0x80000000) == 0)
1664 if (!best || e->function > best->function)
1665 best = e;
1666 }
1667 if (best) {
1668 vcpu->regs[VCPU_REGS_RAX] = best->eax;
1669 vcpu->regs[VCPU_REGS_RBX] = best->ebx;
1670 vcpu->regs[VCPU_REGS_RCX] = best->ecx;
1671 vcpu->regs[VCPU_REGS_RDX] = best->edx;
1672 }
cbdd1bea
CE		 1673 kvm_x86_ops->decache_regs(vcpu);
1674 kvm_x86_ops->skip_emulated_instruction(vcpu);
06465c5a
AK		 1675}
1676EXPORT_SYMBOL_GPL(kvm_emulate_cpuid);
1677
039576c0 1678static int pio_copy_data(struct kvm_vcpu *vcpu)
46fc1477 1679{
039576c0
AK		 1680 void *p = vcpu->pio_data;
1681 void *q;
1682 unsigned bytes;
1683 int nr_pages = vcpu->pio.guest_pages[1] ? 2 : 1;
1684
039576c0
AK		 1685 q = vmap(vcpu->pio.guest_pages, nr_pages, VM_READ|VM_WRITE,
1686 PAGE_KERNEL);
1687 if (!q) {
039576c0
AK		 1688 free_pio_guest_pages(vcpu);
1689 return -ENOMEM;
1690 }
1691 q += vcpu->pio.guest_page_offset;
1692 bytes = vcpu->pio.size * vcpu->pio.cur_count;
1693 if (vcpu->pio.in)
1694 memcpy(q, p, bytes);
1695 else
1696 memcpy(p, q, bytes);
1697 q -= vcpu->pio.guest_page_offset;
1698 vunmap(q);
039576c0
AK		 1699 free_pio_guest_pages(vcpu);
1700 return 0;
1701}
1702
1703static int complete_pio(struct kvm_vcpu *vcpu)
1704{
1705 struct kvm_pio_request *io = &vcpu->pio;
46fc1477 1706 long delta;
039576c0 1707 int r;
46fc1477 1708
cbdd1bea 1709 kvm_x86_ops->cache_regs(vcpu);
46fc1477
AK		 1710
1711 if (!io->string) {
039576c0
AK		 1712 if (io->in)
1713 memcpy(&vcpu->regs[VCPU_REGS_RAX], vcpu->pio_data,
46fc1477
AK		 1714 io->size);
1715 } else {
039576c0
AK		 1716 if (io->in) {
1717 r = pio_copy_data(vcpu);
1718 if (r) {
cbdd1bea 1719 kvm_x86_ops->cache_regs(vcpu);
039576c0
AK		 1720 return r;
1721 }
1722 }
1723
46fc1477
AK		 1724 delta = 1;
1725 if (io->rep) {
039576c0 1726 delta *= io->cur_count;
46fc1477
AK		 1727 /*
1728 * The size of the register should really depend on
1729 * current address size.
1730 */
1731 vcpu->regs[VCPU_REGS_RCX] -= delta;
1732 }
039576c0 1733 if (io->down)
46fc1477
AK		 1734 delta = -delta;
1735 delta *= io->size;
039576c0 1736 if (io->in)
46fc1477
AK		 1737 vcpu->regs[VCPU_REGS_RDI] += delta;
1738 else
1739 vcpu->regs[VCPU_REGS_RSI] += delta;
1740 }
1741
cbdd1bea 1742 kvm_x86_ops->decache_regs(vcpu);
46fc1477 1743
039576c0
AK		 1744 io->count -= io->cur_count;
1745 io->cur_count = 0;
1746
039576c0 1747 return 0;
46fc1477
AK		 1748}
1749
65619eb5
ED		 1750static void kernel_pio(struct kvm_io_device *pio_dev,
1751 struct kvm_vcpu *vcpu,
1752 void *pd)
74906345
ED		 1753{
1754 /* TODO: String I/O for in kernel device */
1755
9cf98828 1756 mutex_lock(&vcpu->kvm->lock);
74906345
ED		 1757 if (vcpu->pio.in)
1758 kvm_iodevice_read(pio_dev, vcpu->pio.port,
1759 vcpu->pio.size,
65619eb5 1760 pd);
74906345
ED		 1761 else
1762 kvm_iodevice_write(pio_dev, vcpu->pio.port,
1763 vcpu->pio.size,
65619eb5 1764 pd);
9cf98828 1765 mutex_unlock(&vcpu->kvm->lock);
65619eb5
ED		 1766}
1767
1768static void pio_string_write(struct kvm_io_device *pio_dev,
1769 struct kvm_vcpu *vcpu)
1770{
1771 struct kvm_pio_request *io = &vcpu->pio;
1772 void *pd = vcpu->pio_data;
1773 int i;
1774
9cf98828 1775 mutex_lock(&vcpu->kvm->lock);
65619eb5
ED		 1776 for (i = 0; i < io->cur_count; i++) {
1777 kvm_iodevice_write(pio_dev, io->port,
1778 io->size,
1779 pd);
1780 pd += io->size;
1781 }
9cf98828 1782 mutex_unlock(&vcpu->kvm->lock);
74906345
ED		 1783}
1784
3090dd73
LV		 1785int kvm_emulate_pio (struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
1786 int size, unsigned port)
1787{
1788 struct kvm_io_device *pio_dev;
1789
1790 vcpu->run->exit_reason = KVM_EXIT_IO;
1791 vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
1792 vcpu->run->io.size = vcpu->pio.size = size;
1793 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
1794 vcpu->run->io.count = vcpu->pio.count = vcpu->pio.cur_count = 1;
1795 vcpu->run->io.port = vcpu->pio.port = port;
1796 vcpu->pio.in = in;
1797 vcpu->pio.string = 0;
1798 vcpu->pio.down = 0;
1799 vcpu->pio.guest_page_offset = 0;
1800 vcpu->pio.rep = 0;
1801
cbdd1bea 1802 kvm_x86_ops->cache_regs(vcpu);
3090dd73 1803 memcpy(vcpu->pio_data, &vcpu->regs[VCPU_REGS_RAX], 4);
cbdd1bea 1804 kvm_x86_ops->decache_regs(vcpu);
3090dd73 1805
0967b7bf
AK		 1806 kvm_x86_ops->skip_emulated_instruction(vcpu);
1807
3090dd73
LV		 1808 pio_dev = vcpu_find_pio_dev(vcpu, port);
1809 if (pio_dev) {
1810 kernel_pio(pio_dev, vcpu, vcpu->pio_data);
1811 complete_pio(vcpu);
1812 return 1;
1813 }
1814 return 0;
1815}
1816EXPORT_SYMBOL_GPL(kvm_emulate_pio);
1817
1818int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
1819 int size, unsigned long count, int down,
039576c0
AK		 1820 gva_t address, int rep, unsigned port)
1821{
1822 unsigned now, in_page;
65619eb5 1823 int i, ret = 0;
039576c0
AK		 1824 int nr_pages = 1;
1825 struct page *page;
74906345 1826 struct kvm_io_device *pio_dev;
039576c0
AK		 1827
1828 vcpu->run->exit_reason = KVM_EXIT_IO;
1829 vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
3090dd73 1830 vcpu->run->io.size = vcpu->pio.size = size;
039576c0 1831 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
3090dd73
LV		 1832 vcpu->run->io.count = vcpu->pio.count = vcpu->pio.cur_count = count;
1833 vcpu->run->io.port = vcpu->pio.port = port;
039576c0 1834 vcpu->pio.in = in;
3090dd73 1835 vcpu->pio.string = 1;
039576c0
AK		 1836 vcpu->pio.down = down;
1837 vcpu->pio.guest_page_offset = offset_in_page(address);
1838 vcpu->pio.rep = rep;
1839
039576c0 1840 if (!count) {
cbdd1bea 1841 kvm_x86_ops->skip_emulated_instruction(vcpu);
039576c0
AK		 1842 return 1;
1843 }
1844
039576c0
AK		 1845 if (!down)
1846 in_page = PAGE_SIZE - offset_in_page(address);
1847 else
1848 in_page = offset_in_page(address) + size;
1849 now = min(count, (unsigned long)in_page / size);
1850 if (!now) {
1851 /*
1852 * String I/O straddles page boundary. Pin two guest pages
1853 * so that we satisfy atomicity constraints. Do just one
1854 * transaction to avoid complexity.
1855 */
1856 nr_pages = 2;
1857 now = 1;
1858 }
1859 if (down) {
1860 /*
1861 * String I/O in reverse. Yuck. Kill the guest, fix later.
1862 */
f0242478 1863 pr_unimpl(vcpu, "guest string pio down\n");
039576c0
AK		 1864 inject_gp(vcpu);
1865 return 1;
1866 }
1867 vcpu->run->io.count = now;
1868 vcpu->pio.cur_count = now;
1869
0967b7bf
AK		 1870 if (vcpu->pio.cur_count == vcpu->pio.count)
1871 kvm_x86_ops->skip_emulated_instruction(vcpu);
1872
039576c0 1873 for (i = 0; i < nr_pages; ++i) {
11ec2804 1874 mutex_lock(&vcpu->kvm->lock);
039576c0
AK		 1875 page = gva_to_page(vcpu, address + i * PAGE_SIZE);
1876 if (page)
1877 get_page(page);
1878 vcpu->pio.guest_pages[i] = page;
11ec2804 1879 mutex_unlock(&vcpu->kvm->lock);
039576c0
AK		 1880 if (!page) {
1881 inject_gp(vcpu);
1882 free_pio_guest_pages(vcpu);
1883 return 1;
1884 }
1885 }
1886
3090dd73 1887 pio_dev = vcpu_find_pio_dev(vcpu, port);
65619eb5
ED		 1888 if (!vcpu->pio.in) {
1889 /* string PIO write */
1890 ret = pio_copy_data(vcpu);
1891 if (ret >= 0 && pio_dev) {
1892 pio_string_write(pio_dev, vcpu);
1893 complete_pio(vcpu);
1894 if (vcpu->pio.count == 0)
1895 ret = 1;
1896 }
1897 } else if (pio_dev)
f0242478 1898 pr_unimpl(vcpu, "no string pio read support yet, "
65619eb5
ED		 1899 "port %x size %d count %ld\n",
1900 port, size, count);
1901
1902 return ret;
039576c0 1903}
3090dd73 1904EXPORT_SYMBOL_GPL(kvm_emulate_pio_string);
039576c0 1905
04d2cc77
AK		 1906/*
1907 * Check if userspace requested an interrupt window, and that the
1908 * interrupt window is open.
1909 *
1910 * No need to exit to userspace if we already have an interrupt queued.
1911 */
1912static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu,
1913 struct kvm_run *kvm_run)
1914{
1915 return (!vcpu->irq_summary &&
1916 kvm_run->request_interrupt_window &&
1917 vcpu->interrupt_window_open &&
1918 (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF));
1919}
1920
1921static void post_kvm_run_save(struct kvm_vcpu *vcpu,
1922 struct kvm_run *kvm_run)
1923{
1924 kvm_run->if_flag = (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF) != 0;
1925 kvm_run->cr8 = get_cr8(vcpu);
1926 kvm_run->apic_base = kvm_get_apic_base(vcpu);
1927 if (irqchip_in_kernel(vcpu->kvm))
1928 kvm_run->ready_for_interrupt_injection = 1;
1929 else
1930 kvm_run->ready_for_interrupt_injection =
1931 (vcpu->interrupt_window_open &&
1932 vcpu->irq_summary == 0);
1933}
1934
1935static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
1936{
1937 int r;
1938
1939 if (unlikely(vcpu->mp_state == VCPU_MP_STATE_SIPI_RECEIVED)) {
1940 printk("vcpu %d received sipi with vector # %x\n",
1941 vcpu->vcpu_id, vcpu->sipi_vector);
1942 kvm_lapic_reset(vcpu);
1943 kvm_x86_ops->vcpu_reset(vcpu);
1944 vcpu->mp_state = VCPU_MP_STATE_RUNNABLE;
1945 }
1946
1947preempted:
1948 if (vcpu->guest_debug.enabled)
1949 kvm_x86_ops->guest_debug_pre(vcpu);
1950
1951again:
1952 r = kvm_mmu_reload(vcpu);
1953 if (unlikely(r))
1954 goto out;
1955
1956 preempt_disable();
1957
1958 kvm_x86_ops->prepare_guest_switch(vcpu);
1959 kvm_load_guest_fpu(vcpu);
1960
1961 local_irq_disable();
1962
1963 if (signal_pending(current)) {
1964 local_irq_enable();
1965 preempt_enable();
1966 r = -EINTR;
1967 kvm_run->exit_reason = KVM_EXIT_INTR;
1968 ++vcpu->stat.signal_exits;
1969 goto out;
1970 }
1971
1972 if (irqchip_in_kernel(vcpu->kvm))
1973 kvm_x86_ops->inject_pending_irq(vcpu);
1974 else if (!vcpu->mmio_read_completed)
1975 kvm_x86_ops->inject_pending_vectors(vcpu, kvm_run);
1976
1977 vcpu->guest_mode = 1;
d172fcd3 1978 kvm_guest_enter();
04d2cc77
AK		 1979
1980 if (vcpu->requests)
1981 if (test_and_clear_bit(KVM_TLB_FLUSH, &vcpu->requests))
1982 kvm_x86_ops->tlb_flush(vcpu);
1983
1984 kvm_x86_ops->run(vcpu, kvm_run);
1985
1986 vcpu->guest_mode = 0;
1987 local_irq_enable();
1988
1989 ++vcpu->stat.exits;
1990
0552f73b
LV		 1991 /*
1992 * We must have an instruction between local_irq_enable() and
1993 * kvm_guest_exit(), so the timer interrupt isn't delayed by
1994 * the interrupt shadow. The stat.exits increment will do nicely.
1995 * But we need to prevent reordering, hence this barrier():
1996 */
1997 barrier();
1998
1999 kvm_guest_exit();
2000
04d2cc77
AK		 2001 preempt_enable();
2002
2003 /*
2004 * Profile KVM exit RIPs:
2005 */
2006 if (unlikely(prof_on == KVM_PROFILING)) {
2007 kvm_x86_ops->cache_regs(vcpu);
2008 profile_hit(KVM_PROFILING, (void *)vcpu->rip);
2009 }
2010
2011 r = kvm_x86_ops->handle_exit(kvm_run, vcpu);
2012
2013 if (r > 0) {
2014 if (dm_request_for_irq_injection(vcpu, kvm_run)) {
2015 r = -EINTR;
2016 kvm_run->exit_reason = KVM_EXIT_INTR;
2017 ++vcpu->stat.request_irq_exits;
2018 goto out;
2019 }
2020 if (!need_resched()) {
2021 ++vcpu->stat.light_exits;
2022 goto again;
2023 }
2024 }
2025
2026out:
2027 if (r > 0) {
2028 kvm_resched(vcpu);
2029 goto preempted;
2030 }
2031
2032 post_kvm_run_save(vcpu, kvm_run);
2033
2034 return r;
2035}
2036
2037
bccf2150 2038static int kvm_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
6aa8b732 2039{
6aa8b732 2040 int r;
1961d276 2041 sigset_t sigsaved;
6aa8b732 2042
bccf2150 2043 vcpu_load(vcpu);
6aa8b732 2044
c5ec1534
HQ		 2045 if (unlikely(vcpu->mp_state == VCPU_MP_STATE_UNINITIALIZED)) {
2046 kvm_vcpu_block(vcpu);
2047 vcpu_put(vcpu);
2048 return -EAGAIN;
2049 }
2050
1961d276
AK		 2051 if (vcpu->sigset_active)
2052 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
2053
54810342 2054 /* re-sync apic's tpr */
5cd4f6fd
HQ		 2055 if (!irqchip_in_kernel(vcpu->kvm))
2056 set_cr8(vcpu, kvm_run->cr8);
54810342 2057
02c83209
AK		 2058 if (vcpu->pio.cur_count) {
2059 r = complete_pio(vcpu);
2060 if (r)
2061 goto out;
2062 }
2063
2064 if (vcpu->mmio_needed) {
2065 memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
2066 vcpu->mmio_read_completed = 1;
2067 vcpu->mmio_needed = 0;
2068 r = emulate_instruction(vcpu, kvm_run,
3427318f 2069 vcpu->mmio_fault_cr2, 0, 1);
02c83209
AK		 2070 if (r == EMULATE_DO_MMIO) {
2071 /*
2072 * Read-modify-write. Back to userspace.
2073 */
02c83209
AK		 2074 r = 0;
2075 goto out;
46fc1477 2076 }
6aa8b732
AK		 2077 }
2078
8eb7d334 2079 if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) {
cbdd1bea 2080 kvm_x86_ops->cache_regs(vcpu);
b4e63f56 2081 vcpu->regs[VCPU_REGS_RAX] = kvm_run->hypercall.ret;
cbdd1bea 2082 kvm_x86_ops->decache_regs(vcpu);
b4e63f56
AK		 2083 }
2084
04d2cc77 2085 r = __vcpu_run(vcpu, kvm_run);
6aa8b732 2086
039576c0 2087out:
1961d276
AK		 2088 if (vcpu->sigset_active)
2089 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
2090
6aa8b732
AK		 2091 vcpu_put(vcpu);
2092 return r;
2093}
2094
bccf2150
AK		 2095static int kvm_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu,
2096 struct kvm_regs *regs)
6aa8b732 2097{
bccf2150 2098 vcpu_load(vcpu);
6aa8b732 2099
cbdd1bea 2100 kvm_x86_ops->cache_regs(vcpu);
6aa8b732
AK		 2101
2102 regs->rax = vcpu->regs[VCPU_REGS_RAX];
2103 regs->rbx = vcpu->regs[VCPU_REGS_RBX];
2104 regs->rcx = vcpu->regs[VCPU_REGS_RCX];
2105 regs->rdx = vcpu->regs[VCPU_REGS_RDX];
2106 regs->rsi = vcpu->regs[VCPU_REGS_RSI];
2107 regs->rdi = vcpu->regs[VCPU_REGS_RDI];
2108 regs->rsp = vcpu->regs[VCPU_REGS_RSP];
2109 regs->rbp = vcpu->regs[VCPU_REGS_RBP];
05b3e0c2 2110#ifdef CONFIG_X86_64
6aa8b732
AK		 2111 regs->r8 = vcpu->regs[VCPU_REGS_R8];
2112 regs->r9 = vcpu->regs[VCPU_REGS_R9];
2113 regs->r10 = vcpu->regs[VCPU_REGS_R10];
2114 regs->r11 = vcpu->regs[VCPU_REGS_R11];
2115 regs->r12 = vcpu->regs[VCPU_REGS_R12];
2116 regs->r13 = vcpu->regs[VCPU_REGS_R13];
2117 regs->r14 = vcpu->regs[VCPU_REGS_R14];
2118 regs->r15 = vcpu->regs[VCPU_REGS_R15];
2119#endif
2120
2121 regs->rip = vcpu->rip;
cbdd1bea 2122 regs->rflags = kvm_x86_ops->get_rflags(vcpu);
6aa8b732
AK		 2123
2124 /*
2125 * Don't leak debug flags in case they were set for guest debugging
2126 */
2127 if (vcpu->guest_debug.enabled && vcpu->guest_debug.singlestep)
2128 regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
2129
2130 vcpu_put(vcpu);
2131
2132 return 0;
2133}
2134
bccf2150
AK		 2135static int kvm_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu,
2136 struct kvm_regs *regs)
6aa8b732 2137{
bccf2150 2138 vcpu_load(vcpu);
6aa8b732
AK		 2139
2140 vcpu->regs[VCPU_REGS_RAX] = regs->rax;
2141 vcpu->regs[VCPU_REGS_RBX] = regs->rbx;
2142 vcpu->regs[VCPU_REGS_RCX] = regs->rcx;
2143 vcpu->regs[VCPU_REGS_RDX] = regs->rdx;
2144 vcpu->regs[VCPU_REGS_RSI] = regs->rsi;
2145 vcpu->regs[VCPU_REGS_RDI] = regs->rdi;
2146 vcpu->regs[VCPU_REGS_RSP] = regs->rsp;
2147 vcpu->regs[VCPU_REGS_RBP] = regs->rbp;
05b3e0c2 2148#ifdef CONFIG_X86_64
6aa8b732
AK		 2149 vcpu->regs[VCPU_REGS_R8] = regs->r8;
2150 vcpu->regs[VCPU_REGS_R9] = regs->r9;
2151 vcpu->regs[VCPU_REGS_R10] = regs->r10;
2152 vcpu->regs[VCPU_REGS_R11] = regs->r11;
2153 vcpu->regs[VCPU_REGS_R12] = regs->r12;
2154 vcpu->regs[VCPU_REGS_R13] = regs->r13;
2155 vcpu->regs[VCPU_REGS_R14] = regs->r14;
2156 vcpu->regs[VCPU_REGS_R15] = regs->r15;
2157#endif
2158
2159 vcpu->rip = regs->rip;
cbdd1bea 2160 kvm_x86_ops->set_rflags(vcpu, regs->rflags);
6aa8b732 2161
cbdd1bea 2162 kvm_x86_ops->decache_regs(vcpu);
6aa8b732
AK		 2163
2164 vcpu_put(vcpu);
2165
2166 return 0;
2167}
2168
2169static void get_segment(struct kvm_vcpu *vcpu,
2170 struct kvm_segment *var, int seg)
2171{
cbdd1bea 2172 return kvm_x86_ops->get_segment(vcpu, var, seg);
6aa8b732
AK		 2173}
2174
bccf2150
AK		 2175static int kvm_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
2176 struct kvm_sregs *sregs)
6aa8b732 2177{
6aa8b732 2178 struct descriptor_table dt;
2a8067f1 2179 int pending_vec;
6aa8b732 2180
bccf2150 2181 vcpu_load(vcpu);
6aa8b732
AK		 2182
2183 get_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
2184 get_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
2185 get_segment(vcpu, &sregs->es, VCPU_SREG_ES);
2186 get_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
2187 get_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
2188 get_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
2189
2190 get_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
2191 get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
2192
cbdd1bea 2193 kvm_x86_ops->get_idt(vcpu, &dt);
6aa8b732
AK		 2194 sregs->idt.limit = dt.limit;
2195 sregs->idt.base = dt.base;
cbdd1bea 2196 kvm_x86_ops->get_gdt(vcpu, &dt);
6aa8b732
AK		 2197 sregs->gdt.limit = dt.limit;
2198 sregs->gdt.base = dt.base;
2199
cbdd1bea 2200 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
6aa8b732
AK		 2201 sregs->cr0 = vcpu->cr0;
2202 sregs->cr2 = vcpu->cr2;
2203 sregs->cr3 = vcpu->cr3;
2204 sregs->cr4 = vcpu->cr4;
7017fc3d 2205 sregs->cr8 = get_cr8(vcpu);
6aa8b732 2206 sregs->efer = vcpu->shadow_efer;
7017fc3d 2207 sregs->apic_base = kvm_get_apic_base(vcpu);
6aa8b732 2208
2a8067f1 2209 if (irqchip_in_kernel(vcpu->kvm)) {
c52fb35a
HQ		 2210 memset(sregs->interrupt_bitmap, 0,
2211 sizeof sregs->interrupt_bitmap);
cbdd1bea 2212 pending_vec = kvm_x86_ops->get_irq(vcpu);
2a8067f1
ED		 2213 if (pending_vec >= 0)
2214 set_bit(pending_vec, (unsigned long *)sregs->interrupt_bitmap);
2215 } else
c52fb35a
HQ		 2216 memcpy(sregs->interrupt_bitmap, vcpu->irq_pending,
2217 sizeof sregs->interrupt_bitmap);
6aa8b732
AK		 2218
2219 vcpu_put(vcpu);
2220
2221 return 0;
2222}
2223
2224static void set_segment(struct kvm_vcpu *vcpu,
2225 struct kvm_segment *var, int seg)
2226{
cbdd1bea 2227 return kvm_x86_ops->set_segment(vcpu, var, seg);
6aa8b732
AK		 2228}
2229
bccf2150
AK		 2230static int kvm_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
2231 struct kvm_sregs *sregs)
6aa8b732 2232{
6aa8b732 2233 int mmu_reset_needed = 0;
2a8067f1 2234 int i, pending_vec, max_bits;
6aa8b732
AK		 2235 struct descriptor_table dt;
2236
bccf2150 2237 vcpu_load(vcpu);
6aa8b732 2238
6aa8b732
AK		 2239 dt.limit = sregs->idt.limit;
2240 dt.base = sregs->idt.base;
cbdd1bea 2241 kvm_x86_ops->set_idt(vcpu, &dt);
6aa8b732
AK		 2242 dt.limit = sregs->gdt.limit;
2243 dt.base = sregs->gdt.base;
cbdd1bea 2244 kvm_x86_ops->set_gdt(vcpu, &dt);
6aa8b732
AK		 2245
2246 vcpu->cr2 = sregs->cr2;
2247 mmu_reset_needed |= vcpu->cr3 != sregs->cr3;
2248 vcpu->cr3 = sregs->cr3;
2249
7017fc3d 2250 set_cr8(vcpu, sregs->cr8);
6aa8b732
AK		 2251
2252 mmu_reset_needed |= vcpu->shadow_efer != sregs->efer;
05b3e0c2 2253#ifdef CONFIG_X86_64
cbdd1bea 2254 kvm_x86_ops->set_efer(vcpu, sregs->efer);
6aa8b732 2255#endif
7017fc3d 2256 kvm_set_apic_base(vcpu, sregs->apic_base);
6aa8b732 2257
cbdd1bea 2258 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
399badf3 2259
6aa8b732 2260 mmu_reset_needed |= vcpu->cr0 != sregs->cr0;
81f50e3b 2261 vcpu->cr0 = sregs->cr0;
cbdd1bea 2262 kvm_x86_ops->set_cr0(vcpu, sregs->cr0);
6aa8b732
AK		 2263
2264 mmu_reset_needed |= vcpu->cr4 != sregs->cr4;
cbdd1bea 2265 kvm_x86_ops->set_cr4(vcpu, sregs->cr4);
1b0973bd
AK		 2266 if (!is_long_mode(vcpu) && is_pae(vcpu))
2267 load_pdptrs(vcpu, vcpu->cr3);
6aa8b732
AK		 2268
2269 if (mmu_reset_needed)
2270 kvm_mmu_reset_context(vcpu);
2271
c52fb35a
HQ		 2272 if (!irqchip_in_kernel(vcpu->kvm)) {
2273 memcpy(vcpu->irq_pending, sregs->interrupt_bitmap,
2274 sizeof vcpu->irq_pending);
2275 vcpu->irq_summary = 0;
2276 for (i = 0; i < ARRAY_SIZE(vcpu->irq_pending); ++i)
2277 if (vcpu->irq_pending[i])
2278 __set_bit(i, &vcpu->irq_summary);
2a8067f1
ED		 2279 } else {
2280 max_bits = (sizeof sregs->interrupt_bitmap) << 3;
2281 pending_vec = find_first_bit(
2282 (const unsigned long *)sregs->interrupt_bitmap,
2283 max_bits);
2284 /* Only pending external irq is handled here */
2285 if (pending_vec < max_bits) {
cbdd1bea 2286 kvm_x86_ops->set_irq(vcpu, pending_vec);
2a8067f1
ED		 2287 printk("Set back pending irq %d\n", pending_vec);
2288 }
c52fb35a 2289 }
6aa8b732 2290
024aa1c0
AK		 2291 set_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
2292 set_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
2293 set_segment(vcpu, &sregs->es, VCPU_SREG_ES);
2294 set_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
2295 set_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
2296 set_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
2297
2298 set_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
2299 set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
2300
6aa8b732
AK		 2301 vcpu_put(vcpu);
2302
2303 return 0;
2304}
2305
1747fb71
RR		 2306void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
2307{
2308 struct kvm_segment cs;
2309
2310 get_segment(vcpu, &cs, VCPU_SREG_CS);
2311 *db = cs.db;
2312 *l = cs.l;
2313}
2314EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits);
2315
6aa8b732
AK		 2316/*
2317 * List of msr numbers which we expose to userspace through KVM_GET_MSRS
2318 * and KVM_SET_MSRS, and KVM_GET_MSR_INDEX_LIST.
bf591b24
MR		 2319 *
2320 * This list is modified at module load time to reflect the
2321 * capabilities of the host cpu.
6aa8b732
AK		 2322 */
2323static u32 msrs_to_save[] = {
2324 MSR_IA32_SYSENTER_CS, MSR_IA32_SYSENTER_ESP, MSR_IA32_SYSENTER_EIP,
2325 MSR_K6_STAR,
05b3e0c2 2326#ifdef CONFIG_X86_64
6aa8b732
AK		 2327 MSR_CSTAR, MSR_KERNEL_GS_BASE, MSR_SYSCALL_MASK, MSR_LSTAR,
2328#endif
2329 MSR_IA32_TIME_STAMP_COUNTER,
2330};
2331
bf591b24
MR		 2332static unsigned num_msrs_to_save;
2333
6f00e68f
AK		 2334static u32 emulated_msrs[] = {
2335 MSR_IA32_MISC_ENABLE,
2336};
2337
bf591b24
MR		 2338static __init void kvm_init_msr_list(void)
2339{
2340 u32 dummy[2];
2341 unsigned i, j;
2342
2343 for (i = j = 0; i < ARRAY_SIZE(msrs_to_save); i++) {
2344 if (rdmsr_safe(msrs_to_save[i], &dummy[0], &dummy[1]) < 0)
2345 continue;
2346 if (j < i)
2347 msrs_to_save[j] = msrs_to_save[i];
2348 j++;
2349 }
2350 num_msrs_to_save = j;
2351}
6aa8b732
AK		 2352
2353/*
2354 * Adapt set_msr() to msr_io()'s calling convention
2355 */
2356static int do_set_msr(struct kvm_vcpu *vcpu, unsigned index, u64 *data)
2357{
35f3f286 2358 return kvm_set_msr(vcpu, index, *data);
6aa8b732
AK		 2359}
2360
2361/*
2362 * Read or write a bunch of msrs. All parameters are kernel addresses.
2363 *
2364 * @return number of msrs set successfully.
2365 */
bccf2150 2366static int __msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs *msrs,
6aa8b732
AK		 2367 struct kvm_msr_entry *entries,
2368 int (*do_msr)(struct kvm_vcpu *vcpu,
2369 unsigned index, u64 *data))
2370{
6aa8b732
AK		 2371 int i;
2372
bccf2150 2373 vcpu_load(vcpu);
6aa8b732
AK		 2374
2375 for (i = 0; i < msrs->nmsrs; ++i)
2376 if (do_msr(vcpu, entries[i].index, &entries[i].data))
2377 break;
2378
2379 vcpu_put(vcpu);
2380
2381 return i;
2382}
2383
2384/*
2385 * Read or write a bunch of msrs. Parameters are user addresses.
2386 *
2387 * @return number of msrs set successfully.
2388 */
bccf2150 2389static int msr_io(struct kvm_vcpu *vcpu, struct kvm_msrs __user *user_msrs,
6aa8b732
AK		 2390 int (*do_msr)(struct kvm_vcpu *vcpu,
2391 unsigned index, u64 *data),
2392 int writeback)
2393{
2394 struct kvm_msrs msrs;
2395 struct kvm_msr_entry *entries;
2396 int r, n;
2397 unsigned size;
2398
2399 r = -EFAULT;
2400 if (copy_from_user(&msrs, user_msrs, sizeof msrs))
2401 goto out;
2402
2403 r = -E2BIG;
2404 if (msrs.nmsrs >= MAX_IO_MSRS)
2405 goto out;
2406
2407 r = -ENOMEM;
2408 size = sizeof(struct kvm_msr_entry) * msrs.nmsrs;
2409 entries = vmalloc(size);
2410 if (!entries)
2411 goto out;
2412
2413 r = -EFAULT;
2414 if (copy_from_user(entries, user_msrs->entries, size))
2415 goto out_free;
2416
bccf2150 2417 r = n = __msr_io(vcpu, &msrs, entries, do_msr);
6aa8b732
AK		 2418 if (r < 0)
2419 goto out_free;
2420
2421 r = -EFAULT;
2422 if (writeback && copy_to_user(user_msrs->entries, entries, size))
2423 goto out_free;
2424
2425 r = n;
2426
2427out_free:
2428 vfree(entries);
2429out:
2430 return r;
2431}
2432
2433/*
2434 * Translate a guest virtual address to a guest physical address.
2435 */
bccf2150
AK		 2436static int kvm_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
2437 struct kvm_translation *tr)
6aa8b732
AK		 2438{
2439 unsigned long vaddr = tr->linear_address;
6aa8b732
AK		 2440 gpa_t gpa;
2441
bccf2150 2442 vcpu_load(vcpu);
11ec2804 2443 mutex_lock(&vcpu->kvm->lock);
6aa8b732
AK		 2444 gpa = vcpu->mmu.gva_to_gpa(vcpu, vaddr);
2445 tr->physical_address = gpa;
2446 tr->valid = gpa != UNMAPPED_GVA;
2447 tr->writeable = 1;
2448 tr->usermode = 0;
11ec2804 2449 mutex_unlock(&vcpu->kvm->lock);
6aa8b732
AK		 2450 vcpu_put(vcpu);
2451
2452 return 0;
2453}
2454
bccf2150
AK		 2455static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu,
2456 struct kvm_interrupt *irq)
6aa8b732 2457{
6aa8b732
AK		 2458 if (irq->irq < 0 || irq->irq >= 256)
2459 return -EINVAL;
97222cc8
ED		 2460 if (irqchip_in_kernel(vcpu->kvm))
2461 return -ENXIO;
bccf2150 2462 vcpu_load(vcpu);
6aa8b732
AK		 2463
2464 set_bit(irq->irq, vcpu->irq_pending);
2465 set_bit(irq->irq / BITS_PER_LONG, &vcpu->irq_summary);
2466
2467 vcpu_put(vcpu);
2468
2469 return 0;
2470}
2471
bccf2150
AK		 2472static int kvm_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
2473 struct kvm_debug_guest *dbg)
6aa8b732 2474{
6aa8b732
AK		 2475 int r;
2476
bccf2150 2477 vcpu_load(vcpu);
6aa8b732 2478
cbdd1bea 2479 r = kvm_x86_ops->set_guest_debug(vcpu, dbg);
6aa8b732
AK		 2480
2481 vcpu_put(vcpu);
2482
2483 return r;
2484}
2485
9a2bb7f4
AK		 2486static struct page *kvm_vcpu_nopage(struct vm_area_struct *vma,
2487 unsigned long address,
2488 int *type)
2489{
2490 struct kvm_vcpu *vcpu = vma->vm_file->private_data;
2491 unsigned long pgoff;
2492 struct page *page;
2493
9a2bb7f4 2494 pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
039576c0
AK		 2495 if (pgoff == 0)
2496 page = virt_to_page(vcpu->run);
2497 else if (pgoff == KVM_PIO_PAGE_OFFSET)
2498 page = virt_to_page(vcpu->pio_data);
2499 else
9a2bb7f4 2500 return NOPAGE_SIGBUS;
9a2bb7f4 2501 get_page(page);
cd0d9137
NAQ		 2502 if (type != NULL)
2503 *type = VM_FAULT_MINOR;
2504
9a2bb7f4
AK		 2505 return page;
2506}
2507
2508static struct vm_operations_struct kvm_vcpu_vm_ops = {
2509 .nopage = kvm_vcpu_nopage,
2510};
2511
2512static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma)
2513{
2514 vma->vm_ops = &kvm_vcpu_vm_ops;
2515 return 0;
2516}
2517
bccf2150
AK		 2518static int kvm_vcpu_release(struct inode *inode, struct file *filp)
2519{
2520 struct kvm_vcpu *vcpu = filp->private_data;
2521
2522 fput(vcpu->kvm->filp);
2523 return 0;
2524}
2525
2526static struct file_operations kvm_vcpu_fops = {
2527 .release = kvm_vcpu_release,
2528 .unlocked_ioctl = kvm_vcpu_ioctl,
2529 .compat_ioctl = kvm_vcpu_ioctl,
9a2bb7f4 2530 .mmap = kvm_vcpu_mmap,
bccf2150
AK		 2531};
2532
2533/*
2534 * Allocates an inode for the vcpu.
2535 */
2536static int create_vcpu_fd(struct kvm_vcpu *vcpu)
2537{
2538 int fd, r;
2539 struct inode *inode;
2540 struct file *file;
2541
d6d28168
AK		 2542 r = anon_inode_getfd(&fd, &inode, &file,
2543 "kvm-vcpu", &kvm_vcpu_fops, vcpu);
2544 if (r)
2545 return r;
bccf2150 2546 atomic_inc(&vcpu->kvm->filp->f_count);
bccf2150 2547 return fd;
bccf2150
AK		 2548}
2549
c5ea7660
AK		 2550/*
2551 * Creates some virtual cpus. Good luck creating more than one.
2552 */
2553static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n)
2554{
2555 int r;
2556 struct kvm_vcpu *vcpu;
2557
c5ea7660 2558 if (!valid_vcpu(n))
fb3f0f51 2559 return -EINVAL;
c5ea7660 2560
cbdd1bea 2561 vcpu = kvm_x86_ops->vcpu_create(kvm, n);
fb3f0f51
RR		 2562 if (IS_ERR(vcpu))
2563 return PTR_ERR(vcpu);
c5ea7660 2564
15ad7146
AK		 2565 preempt_notifier_init(&vcpu->preempt_notifier, &kvm_preempt_ops);
2566
b114b080
RR		 2567 /* We do fxsave: this must be aligned. */
2568 BUG_ON((unsigned long)&vcpu->host_fx_image & 0xF);
2569
fb3f0f51 2570 vcpu_load(vcpu);
c5ea7660 2571 r = kvm_mmu_setup(vcpu);
c5ea7660 2572 vcpu_put(vcpu);
c5ea7660 2573 if (r < 0)
fb3f0f51
RR		 2574 goto free_vcpu;
2575
11ec2804 2576 mutex_lock(&kvm->lock);
fb3f0f51
RR		 2577 if (kvm->vcpus[n]) {
2578 r = -EEXIST;
11ec2804 2579 mutex_unlock(&kvm->lock);
fb3f0f51
RR		 2580 goto mmu_unload;
2581 }
2582 kvm->vcpus[n] = vcpu;
11ec2804 2583 mutex_unlock(&kvm->lock);
c5ea7660 2584
fb3f0f51 2585 /* Now it's all set up, let userspace reach it */
bccf2150
AK		 2586 r = create_vcpu_fd(vcpu);
2587 if (r < 0)
fb3f0f51
RR		 2588 goto unlink;
2589 return r;
39c3b86e 2590
fb3f0f51 2591unlink:
11ec2804 2592 mutex_lock(&kvm->lock);
fb3f0f51 2593 kvm->vcpus[n] = NULL;
11ec2804 2594 mutex_unlock(&kvm->lock);
a2fa3e9f 2595
fb3f0f51
RR		 2596mmu_unload:
2597 vcpu_load(vcpu);
2598 kvm_mmu_unload(vcpu);
2599 vcpu_put(vcpu);
c5ea7660 2600
fb3f0f51 2601free_vcpu:
cbdd1bea 2602 kvm_x86_ops->vcpu_free(vcpu);
c5ea7660
AK		 2603 return r;
2604}
2605
2cc51560
ED		 2606static void cpuid_fix_nx_cap(struct kvm_vcpu *vcpu)
2607{
2608 u64 efer;
2609 int i;
2610 struct kvm_cpuid_entry *e, *entry;
2611
2612 rdmsrl(MSR_EFER, efer);
2613 entry = NULL;
2614 for (i = 0; i < vcpu->cpuid_nent; ++i) {
2615 e = &vcpu->cpuid_entries[i];
2616 if (e->function == 0x80000001) {
2617 entry = e;
2618 break;
2619 }
2620 }
4c981b43 2621 if (entry && (entry->edx & (1 << 20)) && !(efer & EFER_NX)) {
2cc51560 2622 entry->edx &= ~(1 << 20);
4c981b43 2623 printk(KERN_INFO "kvm: guest NX capability removed\n");
2cc51560
ED		 2624 }
2625}
2626
06465c5a
AK		 2627static int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu,
2628 struct kvm_cpuid *cpuid,
2629 struct kvm_cpuid_entry __user *entries)
2630{
2631 int r;
2632
2633 r = -E2BIG;
2634 if (cpuid->nent > KVM_MAX_CPUID_ENTRIES)
2635 goto out;
2636 r = -EFAULT;
2637 if (copy_from_user(&vcpu->cpuid_entries, entries,
2638 cpuid->nent * sizeof(struct kvm_cpuid_entry)))
2639 goto out;
2640 vcpu->cpuid_nent = cpuid->nent;
2cc51560 2641 cpuid_fix_nx_cap(vcpu);
06465c5a
AK		 2642 return 0;
2643
2644out:
2645 return r;
2646}
2647
1961d276
AK		 2648static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset)
2649{
2650 if (sigset) {
2651 sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP));
2652 vcpu->sigset_active = 1;
2653 vcpu->sigset = *sigset;
2654 } else
2655 vcpu->sigset_active = 0;
2656 return 0;
2657}
2658
b8836737
AK		 2659/*
2660 * fxsave fpu state. Taken from x86_64/processor.h. To be killed when
2661 * we have asm/x86/processor.h
2662 */
2663struct fxsave {
2664 u16 cwd;
2665 u16 swd;
2666 u16 twd;
2667 u16 fop;
2668 u64 rip;
2669 u64 rdp;
2670 u32 mxcsr;
2671 u32 mxcsr_mask;
2672 u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
2673#ifdef CONFIG_X86_64
2674 u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */
2675#else
2676 u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */
2677#endif
2678};
2679
2680static int kvm_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
2681{
b114b080 2682 struct fxsave *fxsave = (struct fxsave *)&vcpu->guest_fx_image;
b8836737
AK		 2683
2684 vcpu_load(vcpu);
2685
2686 memcpy(fpu->fpr, fxsave->st_space, 128);
2687 fpu->fcw = fxsave->cwd;
2688 fpu->fsw = fxsave->swd;
2689 fpu->ftwx = fxsave->twd;
2690 fpu->last_opcode = fxsave->fop;
2691 fpu->last_ip = fxsave->rip;
2692 fpu->last_dp = fxsave->rdp;
2693 memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space);
2694
2695 vcpu_put(vcpu);
2696
2697 return 0;
2698}
2699
2700static int kvm_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
2701{
b114b080 2702 struct fxsave *fxsave = (struct fxsave *)&vcpu->guest_fx_image;
b8836737
AK		 2703
2704 vcpu_load(vcpu);
2705
2706 memcpy(fxsave->st_space, fpu->fpr, 128);
2707 fxsave->cwd = fpu->fcw;
2708 fxsave->swd = fpu->fsw;
2709 fxsave->twd = fpu->ftwx;
2710 fxsave->fop = fpu->last_opcode;
2711 fxsave->rip = fpu->last_ip;
2712 fxsave->rdp = fpu->last_dp;
2713 memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space);
2714
2715 vcpu_put(vcpu);
2716
2717 return 0;
2718}
2719
96ad2cc6
ED		 2720static int kvm_vcpu_ioctl_get_lapic(struct kvm_vcpu *vcpu,
2721 struct kvm_lapic_state *s)
2722{
2723 vcpu_load(vcpu);
2724 memcpy(s->regs, vcpu->apic->regs, sizeof *s);
2725 vcpu_put(vcpu);
2726
2727 return 0;
2728}
2729
2730static int kvm_vcpu_ioctl_set_lapic(struct kvm_vcpu *vcpu,
2731 struct kvm_lapic_state *s)
2732{
2733 vcpu_load(vcpu);
2734 memcpy(vcpu->apic->regs, s->regs, sizeof *s);
2735 kvm_apic_post_state_restore(vcpu);
2736 vcpu_put(vcpu);
2737
2738 return 0;
2739}
2740
bccf2150
AK		 2741static long kvm_vcpu_ioctl(struct file *filp,
2742 unsigned int ioctl, unsigned long arg)
6aa8b732 2743{
bccf2150 2744 struct kvm_vcpu *vcpu = filp->private_data;
2f366987 2745 void __user *argp = (void __user *)arg;
6aa8b732
AK		 2746 int r = -EINVAL;
2747
2748 switch (ioctl) {
9a2bb7f4 2749 case KVM_RUN:
f0fe5108
AK		 2750 r = -EINVAL;
2751 if (arg)
2752 goto out;
9a2bb7f4 2753 r = kvm_vcpu_ioctl_run(vcpu, vcpu->run);
6aa8b732 2754 break;
6aa8b732
AK		 2755 case KVM_GET_REGS: {
2756 struct kvm_regs kvm_regs;
2757
bccf2150
AK		 2758 memset(&kvm_regs, 0, sizeof kvm_regs);
2759 r = kvm_vcpu_ioctl_get_regs(vcpu, &kvm_regs);
6aa8b732
AK		 2760 if (r)
2761 goto out;
2762 r = -EFAULT;
2f366987 2763 if (copy_to_user(argp, &kvm_regs, sizeof kvm_regs))
6aa8b732
AK		 2764 goto out;
2765 r = 0;
2766 break;
2767 }
2768 case KVM_SET_REGS: {
2769 struct kvm_regs kvm_regs;
2770
2771 r = -EFAULT;
2f366987 2772 if (copy_from_user(&kvm_regs, argp, sizeof kvm_regs))
6aa8b732 2773 goto out;
bccf2150 2774 r = kvm_vcpu_ioctl_set_regs(vcpu, &kvm_regs);
6aa8b732
AK		 2775 if (r)
2776 goto out;
2777 r = 0;
2778 break;
2779 }
2780 case KVM_GET_SREGS: {
2781 struct kvm_sregs kvm_sregs;
2782
bccf2150
AK		 2783 memset(&kvm_sregs, 0, sizeof kvm_sregs);
2784 r = kvm_vcpu_ioctl_get_sregs(vcpu, &kvm_sregs);
6aa8b732
AK		 2785 if (r)
2786 goto out;
2787 r = -EFAULT;
2f366987 2788 if (copy_to_user(argp, &kvm_sregs, sizeof kvm_sregs))
6aa8b732
AK		 2789 goto out;
2790 r = 0;
2791 break;
2792 }
2793 case KVM_SET_SREGS: {
2794 struct kvm_sregs kvm_sregs;
2795
2796 r = -EFAULT;
2f366987 2797 if (copy_from_user(&kvm_sregs, argp, sizeof kvm_sregs))
6aa8b732 2798 goto out;
bccf2150 2799 r = kvm_vcpu_ioctl_set_sregs(vcpu, &kvm_sregs);
6aa8b732
AK		 2800 if (r)
2801 goto out;
2802 r = 0;
2803 break;
2804 }
2805 case KVM_TRANSLATE: {
2806 struct kvm_translation tr;
2807
2808 r = -EFAULT;
2f366987 2809 if (copy_from_user(&tr, argp, sizeof tr))
6aa8b732 2810 goto out;
bccf2150 2811 r = kvm_vcpu_ioctl_translate(vcpu, &tr);
6aa8b732
AK		 2812 if (r)
2813 goto out;
2814 r = -EFAULT;
2f366987 2815 if (copy_to_user(argp, &tr, sizeof tr))
6aa8b732
AK		 2816 goto out;
2817 r = 0;
2818 break;
2819 }
2820 case KVM_INTERRUPT: {
2821 struct kvm_interrupt irq;
2822
2823 r = -EFAULT;
2f366987 2824 if (copy_from_user(&irq, argp, sizeof irq))
6aa8b732 2825 goto out;
bccf2150 2826 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
6aa8b732
AK		 2827 if (r)
2828 goto out;
2829 r = 0;
2830 break;
2831 }
2832 case KVM_DEBUG_GUEST: {
2833 struct kvm_debug_guest dbg;
2834
2835 r = -EFAULT;
2f366987 2836 if (copy_from_user(&dbg, argp, sizeof dbg))
6aa8b732 2837 goto out;
bccf2150 2838 r = kvm_vcpu_ioctl_debug_guest(vcpu, &dbg);
6aa8b732
AK		 2839 if (r)
2840 goto out;
2841 r = 0;
2842 break;
2843 }
bccf2150 2844 case KVM_GET_MSRS:
35f3f286 2845 r = msr_io(vcpu, argp, kvm_get_msr, 1);
bccf2150
AK		 2846 break;
2847 case KVM_SET_MSRS:
2848 r = msr_io(vcpu, argp, do_set_msr, 0);
2849 break;
06465c5a
AK		 2850 case KVM_SET_CPUID: {
2851 struct kvm_cpuid __user *cpuid_arg = argp;
2852 struct kvm_cpuid cpuid;
2853
2854 r = -EFAULT;
2855 if (copy_from_user(&cpuid, cpuid_arg, sizeof cpuid))
2856 goto out;
2857 r = kvm_vcpu_ioctl_set_cpuid(vcpu, &cpuid, cpuid_arg->entries);
2858 if (r)
2859 goto out;
2860 break;
2861 }
1961d276
AK		 2862 case KVM_SET_SIGNAL_MASK: {
2863 struct kvm_signal_mask __user *sigmask_arg = argp;
2864 struct kvm_signal_mask kvm_sigmask;
2865 sigset_t sigset, *p;
2866
2867 p = NULL;
2868 if (argp) {
2869 r = -EFAULT;
2870 if (copy_from_user(&kvm_sigmask, argp,
2871 sizeof kvm_sigmask))
2872 goto out;
2873 r = -EINVAL;
2874 if (kvm_sigmask.len != sizeof sigset)
2875 goto out;
2876 r = -EFAULT;
2877 if (copy_from_user(&sigset, sigmask_arg->sigset,
2878 sizeof sigset))
2879 goto out;
2880 p = &sigset;
2881 }
2882 r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset);
2883 break;
2884 }
b8836737
AK		 2885 case KVM_GET_FPU: {
2886 struct kvm_fpu fpu;
2887
2888 memset(&fpu, 0, sizeof fpu);
2889 r = kvm_vcpu_ioctl_get_fpu(vcpu, &fpu);
2890 if (r)
2891 goto out;
2892 r = -EFAULT;
2893 if (copy_to_user(argp, &fpu, sizeof fpu))
2894 goto out;
2895 r = 0;
2896 break;
2897 }
2898 case KVM_SET_FPU: {
2899 struct kvm_fpu fpu;
2900
2901 r = -EFAULT;
2902 if (copy_from_user(&fpu, argp, sizeof fpu))
2903 goto out;
2904 r = kvm_vcpu_ioctl_set_fpu(vcpu, &fpu);
2905 if (r)
2906 goto out;
2907 r = 0;
2908 break;
2909 }
96ad2cc6
ED		 2910 case KVM_GET_LAPIC: {
2911 struct kvm_lapic_state lapic;
2912
2913 memset(&lapic, 0, sizeof lapic);
2914 r = kvm_vcpu_ioctl_get_lapic(vcpu, &lapic);
2915 if (r)
2916 goto out;
2917 r = -EFAULT;
2918 if (copy_to_user(argp, &lapic, sizeof lapic))
2919 goto out;
2920 r = 0;
2921 break;
2922 }
2923 case KVM_SET_LAPIC: {
2924 struct kvm_lapic_state lapic;
2925
2926 r = -EFAULT;
2927 if (copy_from_user(&lapic, argp, sizeof lapic))
2928 goto out;
2929 r = kvm_vcpu_ioctl_set_lapic(vcpu, &lapic);;
2930 if (r)
2931 goto out;
2932 r = 0;
2933 break;
2934 }
bccf2150
AK		 2935 default:
2936 ;
2937 }
2938out:
2939 return r;
2940}
2941
2942static long kvm_vm_ioctl(struct file *filp,
2943 unsigned int ioctl, unsigned long arg)
2944{
2945 struct kvm *kvm = filp->private_data;
2946 void __user *argp = (void __user *)arg;
2947 int r = -EINVAL;
2948
2949 switch (ioctl) {
2950 case KVM_CREATE_VCPU:
2951 r = kvm_vm_ioctl_create_vcpu(kvm, arg);
2952 if (r < 0)
2953 goto out;
2954 break;
6aa8b732
AK		 2955 case KVM_SET_MEMORY_REGION: {
2956 struct kvm_memory_region kvm_mem;
2957
2958 r = -EFAULT;
2f366987 2959 if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
6aa8b732 2960 goto out;
2c6f5df9 2961 r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_mem);
6aa8b732
AK		 2962 if (r)
2963 goto out;
2964 break;
2965 }
2966 case KVM_GET_DIRTY_LOG: {
2967 struct kvm_dirty_log log;
2968
2969 r = -EFAULT;
2f366987 2970 if (copy_from_user(&log, argp, sizeof log))
6aa8b732 2971 goto out;
2c6f5df9 2972 r = kvm_vm_ioctl_get_dirty_log(kvm, &log);
6aa8b732
AK		 2973 if (r)
2974 goto out;
2975 break;
2976 }
e8207547
AK		 2977 case KVM_SET_MEMORY_ALIAS: {
2978 struct kvm_memory_alias alias;
2979
2980 r = -EFAULT;
2981 if (copy_from_user(&alias, argp, sizeof alias))
2982 goto out;
2983 r = kvm_vm_ioctl_set_memory_alias(kvm, &alias);
2984 if (r)
2985 goto out;
2986 break;
2987 }
85f455f7
ED		 2988 case KVM_CREATE_IRQCHIP:
2989 r = -ENOMEM;
2990 kvm->vpic = kvm_create_pic(kvm);
1fd4f2a5
ED		 2991 if (kvm->vpic) {
2992 r = kvm_ioapic_init(kvm);
2993 if (r) {
2994 kfree(kvm->vpic);
2995 kvm->vpic = NULL;
2996 goto out;
2997 }
2998 }
85f455f7
ED		 2999 else
3000 goto out;
3001 break;
3002 case KVM_IRQ_LINE: {
3003 struct kvm_irq_level irq_event;
3004
3005 r = -EFAULT;
3006 if (copy_from_user(&irq_event, argp, sizeof irq_event))
3007 goto out;
3008 if (irqchip_in_kernel(kvm)) {
9cf98828 3009 mutex_lock(&kvm->lock);
85f455f7
ED		 3010 if (irq_event.irq < 16)
3011 kvm_pic_set_irq(pic_irqchip(kvm),
3012 irq_event.irq,
3013 irq_event.level);
1fd4f2a5
ED		 3014 kvm_ioapic_set_irq(kvm->vioapic,
3015 irq_event.irq,
3016 irq_event.level);
9cf98828 3017 mutex_unlock(&kvm->lock);
85f455f7
ED		 3018 r = 0;
3019 }
3020 break;
3021 }
6ceb9d79
HQ		 3022 case KVM_GET_IRQCHIP: {
3023 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
3024 struct kvm_irqchip chip;
3025
3026 r = -EFAULT;
3027 if (copy_from_user(&chip, argp, sizeof chip))
3028 goto out;
3029 r = -ENXIO;
3030 if (!irqchip_in_kernel(kvm))
3031 goto out;
3032 r = kvm_vm_ioctl_get_irqchip(kvm, &chip);
3033 if (r)
3034 goto out;
3035 r = -EFAULT;
3036 if (copy_to_user(argp, &chip, sizeof chip))
3037 goto out;
3038 r = 0;
3039 break;
3040 }
3041 case KVM_SET_IRQCHIP: {
3042 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
3043 struct kvm_irqchip chip;
3044
3045 r = -EFAULT;
3046 if (copy_from_user(&chip, argp, sizeof chip))
3047 goto out;
3048 r = -ENXIO;
3049 if (!irqchip_in_kernel(kvm))
3050 goto out;
3051 r = kvm_vm_ioctl_set_irqchip(kvm, &chip);
3052 if (r)
3053 goto out;
3054 r = 0;
3055 break;
3056 }
f17abe9a
AK		 3057 default:
3058 ;
3059 }
3060out:
3061 return r;
3062}
3063
3064static struct page *kvm_vm_nopage(struct vm_area_struct *vma,
3065 unsigned long address,
3066 int *type)
3067{
3068 struct kvm *kvm = vma->vm_file->private_data;
3069 unsigned long pgoff;
f17abe9a
AK		 3070 struct page *page;
3071
f17abe9a 3072 pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
954bbbc2 3073 page = gfn_to_page(kvm, pgoff);
f17abe9a
AK		 3074 if (!page)
3075 return NOPAGE_SIGBUS;
3076 get_page(page);
cd0d9137
NAQ		 3077 if (type != NULL)
3078 *type = VM_FAULT_MINOR;
3079
f17abe9a
AK		 3080 return page;
3081}
3082
3083static struct vm_operations_struct kvm_vm_vm_ops = {
3084 .nopage = kvm_vm_nopage,
3085};
3086
3087static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma)
3088{
3089 vma->vm_ops = &kvm_vm_vm_ops;
3090 return 0;
3091}
3092
3093static struct file_operations kvm_vm_fops = {
3094 .release = kvm_vm_release,
3095 .unlocked_ioctl = kvm_vm_ioctl,
3096 .compat_ioctl = kvm_vm_ioctl,
3097 .mmap = kvm_vm_mmap,
3098};
3099
3100static int kvm_dev_ioctl_create_vm(void)
3101{
3102 int fd, r;
3103 struct inode *inode;
3104 struct file *file;
3105 struct kvm *kvm;
3106
f17abe9a 3107 kvm = kvm_create_vm();
d6d28168
AK		 3108 if (IS_ERR(kvm))
3109 return PTR_ERR(kvm);
3110 r = anon_inode_getfd(&fd, &inode, &file, "kvm-vm", &kvm_vm_fops, kvm);
3111 if (r) {
3112 kvm_destroy_vm(kvm);
3113 return r;
f17abe9a
AK		 3114 }
3115
bccf2150 3116 kvm->filp = file;
f17abe9a 3117
f17abe9a 3118 return fd;
f17abe9a
AK		 3119}
3120
3121static long kvm_dev_ioctl(struct file *filp,
3122 unsigned int ioctl, unsigned long arg)
3123{
3124 void __user *argp = (void __user *)arg;
07c45a36 3125 long r = -EINVAL;
f17abe9a
AK		 3126
3127 switch (ioctl) {
3128 case KVM_GET_API_VERSION:
f0fe5108
AK		 3129 r = -EINVAL;
3130 if (arg)
3131 goto out;
f17abe9a
AK		 3132 r = KVM_API_VERSION;
3133 break;
3134 case KVM_CREATE_VM:
f0fe5108
AK		 3135 r = -EINVAL;
3136 if (arg)
3137 goto out;
f17abe9a
AK		 3138 r = kvm_dev_ioctl_create_vm();
3139 break;
6aa8b732 3140 case KVM_GET_MSR_INDEX_LIST: {
2f366987 3141 struct kvm_msr_list __user *user_msr_list = argp;
6aa8b732
AK		 3142 struct kvm_msr_list msr_list;
3143 unsigned n;
3144
3145 r = -EFAULT;
3146 if (copy_from_user(&msr_list, user_msr_list, sizeof msr_list))
3147 goto out;
3148 n = msr_list.nmsrs;
6f00e68f 3149 msr_list.nmsrs = num_msrs_to_save + ARRAY_SIZE(emulated_msrs);
6aa8b732
AK		 3150 if (copy_to_user(user_msr_list, &msr_list, sizeof msr_list))
3151 goto out;
3152 r = -E2BIG;
bf591b24 3153 if (n < num_msrs_to_save)
6aa8b732
AK		 3154 goto out;
3155 r = -EFAULT;
3156 if (copy_to_user(user_msr_list->indices, &msrs_to_save,
bf591b24 3157 num_msrs_to_save * sizeof(u32)))
6aa8b732 3158 goto out;
6f00e68f
AK		 3159 if (copy_to_user(user_msr_list->indices
3160 + num_msrs_to_save * sizeof(u32),
3161 &emulated_msrs,
3162 ARRAY_SIZE(emulated_msrs) * sizeof(u32)))
3163 goto out;
6aa8b732 3164 r = 0;
cc1d8955 3165 break;
6aa8b732 3166 }
85f455f7
ED		 3167 case KVM_CHECK_EXTENSION: {
3168 int ext = (long)argp;
3169
3170 switch (ext) {
3171 case KVM_CAP_IRQCHIP:
b6958ce4 3172 case KVM_CAP_HLT:
85f455f7
ED		 3173 r = 1;
3174 break;
3175 default:
3176 r = 0;
3177 break;
3178 }
5d308f45 3179 break;
85f455f7 3180 }
07c45a36
AK		 3181 case KVM_GET_VCPU_MMAP_SIZE:
3182 r = -EINVAL;
3183 if (arg)
3184 goto out;
039576c0 3185 r = 2 * PAGE_SIZE;
07c45a36 3186 break;
6aa8b732
AK		 3187 default:
3188 ;
3189 }
3190out:
3191 return r;
3192}
3193
6aa8b732 3194static struct file_operations kvm_chardev_ops = {
6aa8b732
AK		 3195 .unlocked_ioctl = kvm_dev_ioctl,
3196 .compat_ioctl = kvm_dev_ioctl,
6aa8b732
AK		 3197};
3198
3199static struct miscdevice kvm_dev = {
bbe4432e 3200 KVM_MINOR,
6aa8b732
AK		 3201 "kvm",
3202 &kvm_chardev_ops,
3203};
3204
774c47f1
AK		 3205/*
3206 * Make sure that a cpu that is being hot-unplugged does not have any vcpus
3207 * cached on it.
3208 */
3209static void decache_vcpus_on_cpu(int cpu)
3210{
3211 struct kvm *vm;
3212 struct kvm_vcpu *vcpu;
3213 int i;
3214
3215 spin_lock(&kvm_lock);
11ec2804 3216 list_for_each_entry(vm, &vm_list, vm_list)
774c47f1 3217 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
fb3f0f51
RR		 3218 vcpu = vm->vcpus[i];
3219 if (!vcpu)
3220 continue;
774c47f1
AK		 3221 /*
3222 * If the vcpu is locked, then it is running on some
3223 * other cpu and therefore it is not cached on the
3224 * cpu in question.
3225 *
3226 * If it's not locked, check the last cpu it executed
3227 * on.
3228 */
3229 if (mutex_trylock(&vcpu->mutex)) {
3230 if (vcpu->cpu == cpu) {
cbdd1bea 3231 kvm_x86_ops->vcpu_decache(vcpu);
774c47f1
AK		 3232 vcpu->cpu = -1;
3233 }
3234 mutex_unlock(&vcpu->mutex);
3235 }
3236 }
3237 spin_unlock(&kvm_lock);
3238}
3239
1b6c0168
AK		 3240static void hardware_enable(void *junk)
3241{
3242 int cpu = raw_smp_processor_id();
3243
3244 if (cpu_isset(cpu, cpus_hardware_enabled))
3245 return;
3246 cpu_set(cpu, cpus_hardware_enabled);
cbdd1bea 3247 kvm_x86_ops->hardware_enable(NULL);
1b6c0168
AK		 3248}
3249
3250static void hardware_disable(void *junk)
3251{
3252 int cpu = raw_smp_processor_id();
3253
3254 if (!cpu_isset(cpu, cpus_hardware_enabled))
3255 return;
3256 cpu_clear(cpu, cpus_hardware_enabled);
3257 decache_vcpus_on_cpu(cpu);
cbdd1bea 3258 kvm_x86_ops->hardware_disable(NULL);
1b6c0168
AK		 3259}
3260
774c47f1
AK		 3261static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val,
3262 void *v)
3263{
3264 int cpu = (long)v;
3265
3266 switch (val) {
cec9ad27
AK		 3267 case CPU_DYING:
3268 case CPU_DYING_FROZEN:
6ec8a856
AK		 3269 printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",
3270 cpu);
3271 hardware_disable(NULL);
3272 break;
774c47f1 3273 case CPU_UP_CANCELED:
8bb78442 3274 case CPU_UP_CANCELED_FROZEN:
43934a38
JK		 3275 printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",
3276 cpu);
1b6c0168 3277 smp_call_function_single(cpu, hardware_disable, NULL, 0, 1);
774c47f1 3278 break;
43934a38 3279 case CPU_ONLINE:
8bb78442 3280 case CPU_ONLINE_FROZEN:
43934a38
JK		 3281 printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n",
3282 cpu);
1b6c0168 3283 smp_call_function_single(cpu, hardware_enable, NULL, 0, 1);
774c47f1
AK		 3284 break;
3285 }
3286 return NOTIFY_OK;
3287}
3288
9a2b85c6
RR		 3289static int kvm_reboot(struct notifier_block *notifier, unsigned long val,
3290 void *v)
3291{
3292 if (val == SYS_RESTART) {
3293 /*
3294 * Some (well, at least mine) BIOSes hang on reboot if
3295 * in vmx root mode.
3296 */
3297 printk(KERN_INFO "kvm: exiting hardware virtualization\n");
3298 on_each_cpu(hardware_disable, NULL, 0, 1);
3299 }
3300 return NOTIFY_OK;
3301}
3302
3303static struct notifier_block kvm_reboot_notifier = {
3304 .notifier_call = kvm_reboot,
3305 .priority = 0,
3306};
3307
2eeb2e94
GH		 3308void kvm_io_bus_init(struct kvm_io_bus *bus)
3309{
3310 memset(bus, 0, sizeof(*bus));
3311}
3312
3313void kvm_io_bus_destroy(struct kvm_io_bus *bus)
3314{
3315 int i;
3316
3317 for (i = 0; i < bus->dev_count; i++) {
3318 struct kvm_io_device *pos = bus->devs[i];
3319
3320 kvm_iodevice_destructor(pos);
3321 }
3322}
3323
3324struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr)
3325{
3326 int i;
3327
3328 for (i = 0; i < bus->dev_count; i++) {
3329 struct kvm_io_device *pos = bus->devs[i];
3330
3331 if (pos->in_range(pos, addr))
3332 return pos;
3333 }
3334
3335 return NULL;
3336}
3337
3338void kvm_io_bus_register_dev(struct kvm_io_bus *bus, struct kvm_io_device *dev)
3339{
3340 BUG_ON(bus->dev_count > (NR_IOBUS_DEVS-1));
3341
3342 bus->devs[bus->dev_count++] = dev;
3343}
3344
774c47f1
AK		 3345static struct notifier_block kvm_cpu_notifier = {
3346 .notifier_call = kvm_cpu_hotplug,
3347 .priority = 20, /* must be > scheduler priority */
3348};
3349
1165f5fe
AK		 3350static u64 stat_get(void *_offset)
3351{
3352 unsigned offset = (long)_offset;
3353 u64 total = 0;
3354 struct kvm *kvm;
3355 struct kvm_vcpu *vcpu;
3356 int i;
3357
3358 spin_lock(&kvm_lock);
3359 list_for_each_entry(kvm, &vm_list, vm_list)
3360 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
fb3f0f51
RR		 3361 vcpu = kvm->vcpus[i];
3362 if (vcpu)
3363 total += *(u32 *)((void *)vcpu + offset);
1165f5fe
AK		 3364 }
3365 spin_unlock(&kvm_lock);
3366 return total;
3367}
3368
3dea7ca7 3369DEFINE_SIMPLE_ATTRIBUTE(stat_fops, stat_get, NULL, "%llu\n");
1165f5fe 3370
6aa8b732
AK		 3371static __init void kvm_init_debug(void)
3372{
3373 struct kvm_stats_debugfs_item *p;
3374
8b6d44c7 3375 debugfs_dir = debugfs_create_dir("kvm", NULL);
6aa8b732 3376 for (p = debugfs_entries; p->name; ++p)
1165f5fe
AK		 3377 p->dentry = debugfs_create_file(p->name, 0444, debugfs_dir,
3378 (void *)(long)p->offset,
3379 &stat_fops);
6aa8b732
AK		 3380}
3381
3382static void kvm_exit_debug(void)
3383{
3384 struct kvm_stats_debugfs_item *p;
3385
3386 for (p = debugfs_entries; p->name; ++p)
3387 debugfs_remove(p->dentry);
3388 debugfs_remove(debugfs_dir);
3389}
3390
59ae6c6b
AK		 3391static int kvm_suspend(struct sys_device *dev, pm_message_t state)
3392{
4267c41a 3393 hardware_disable(NULL);
59ae6c6b
AK		 3394 return 0;
3395}
3396
3397static int kvm_resume(struct sys_device *dev)
3398{
4267c41a 3399 hardware_enable(NULL);
59ae6c6b
AK		 3400 return 0;
3401}
3402
3403static struct sysdev_class kvm_sysdev_class = {
af5ca3f4 3404 .name = "kvm",
59ae6c6b
AK		 3405 .suspend = kvm_suspend,
3406 .resume = kvm_resume,
3407};
3408
3409static struct sys_device kvm_sysdev = {
3410 .id = 0,
3411 .cls = &kvm_sysdev_class,
3412};
3413
6aa8b732
AK		 3414hpa_t bad_page_address;
3415
15ad7146
AK		 3416static inline
3417struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn)
3418{
3419 return container_of(pn, struct kvm_vcpu, preempt_notifier);
3420}
3421
3422static void kvm_sched_in(struct preempt_notifier *pn, int cpu)
3423{
3424 struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn);
3425
cbdd1bea 3426 kvm_x86_ops->vcpu_load(vcpu, cpu);
15ad7146
AK		 3427}
3428
3429static void kvm_sched_out(struct preempt_notifier *pn,
3430 struct task_struct *next)
3431{
3432 struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn);
3433
cbdd1bea 3434 kvm_x86_ops->vcpu_put(vcpu);
15ad7146
AK		 3435}
3436
cbdd1bea 3437int kvm_init_x86(struct kvm_x86_ops *ops, unsigned int vcpu_size,
c16f862d 3438 struct module *module)
6aa8b732
AK		 3439{
3440 int r;
002c7f7c 3441 int cpu;
6aa8b732 3442
cbdd1bea 3443 if (kvm_x86_ops) {
09db28b8
YI		 3444 printk(KERN_ERR "kvm: already loaded the other module\n");
3445 return -EEXIST;
3446 }
3447
e097f35c 3448 if (!ops->cpu_has_kvm_support()) {
6aa8b732
AK		 3449 printk(KERN_ERR "kvm: no hardware support\n");
3450 return -EOPNOTSUPP;
3451 }
e097f35c 3452 if (ops->disabled_by_bios()) {
6aa8b732
AK		 3453 printk(KERN_ERR "kvm: disabled by bios\n");
3454 return -EOPNOTSUPP;
3455 }
3456
cbdd1bea 3457 kvm_x86_ops = ops;
e097f35c 3458
cbdd1bea 3459 r = kvm_x86_ops->hardware_setup();
6aa8b732 3460 if (r < 0)
ca45aaae 3461 goto out;
6aa8b732 3462
002c7f7c
YS		 3463 for_each_online_cpu(cpu) {
3464 smp_call_function_single(cpu,
cbdd1bea 3465 kvm_x86_ops->check_processor_compatibility,
002c7f7c
YS		 3466 &r, 0, 1);
3467 if (r < 0)
3468 goto out_free_0;
3469 }
3470
1b6c0168 3471 on_each_cpu(hardware_enable, NULL, 0, 1);
774c47f1
AK		 3472 r = register_cpu_notifier(&kvm_cpu_notifier);
3473 if (r)
3474 goto out_free_1;
6aa8b732
AK		 3475 register_reboot_notifier(&kvm_reboot_notifier);
3476
59ae6c6b
AK		 3477 r = sysdev_class_register(&kvm_sysdev_class);
3478 if (r)
3479 goto out_free_2;
3480
3481 r = sysdev_register(&kvm_sysdev);
3482 if (r)
3483 goto out_free_3;
3484
c16f862d
RR		 3485 /* A kmem cache lets us meet the alignment requirements of fx_save. */
3486 kvm_vcpu_cache = kmem_cache_create("kvm_vcpu", vcpu_size,
3487 __alignof__(struct kvm_vcpu), 0, 0);
3488 if (!kvm_vcpu_cache) {
3489 r = -ENOMEM;
3490 goto out_free_4;
3491 }
3492
6aa8b732
AK		 3493 kvm_chardev_ops.owner = module;
3494
3495 r = misc_register(&kvm_dev);
3496 if (r) {
3497 printk (KERN_ERR "kvm: misc device register failed\n");
3498 goto out_free;
3499 }
3500
15ad7146
AK		 3501 kvm_preempt_ops.sched_in = kvm_sched_in;
3502 kvm_preempt_ops.sched_out = kvm_sched_out;
3503
6aa8b732
AK		 3504 return r;
3505
3506out_free:
c16f862d
RR		 3507 kmem_cache_destroy(kvm_vcpu_cache);
3508out_free_4:
59ae6c6b
AK		 3509 sysdev_unregister(&kvm_sysdev);
3510out_free_3:
3511 sysdev_class_unregister(&kvm_sysdev_class);
3512out_free_2:
6aa8b732 3513 unregister_reboot_notifier(&kvm_reboot_notifier);
774c47f1
AK		 3514 unregister_cpu_notifier(&kvm_cpu_notifier);
3515out_free_1:
1b6c0168 3516 on_each_cpu(hardware_disable, NULL, 0, 1);
002c7f7c 3517out_free_0:
cbdd1bea 3518 kvm_x86_ops->hardware_unsetup();
ca45aaae 3519out:
cbdd1bea 3520 kvm_x86_ops = NULL;
6aa8b732
AK		 3521 return r;
3522}
3523
cbdd1bea 3524void kvm_exit_x86(void)
6aa8b732
AK		 3525{
3526 misc_deregister(&kvm_dev);
c16f862d 3527 kmem_cache_destroy(kvm_vcpu_cache);
59ae6c6b
AK		 3528 sysdev_unregister(&kvm_sysdev);
3529 sysdev_class_unregister(&kvm_sysdev_class);
6aa8b732 3530 unregister_reboot_notifier(&kvm_reboot_notifier);
59ae6c6b 3531 unregister_cpu_notifier(&kvm_cpu_notifier);
1b6c0168 3532 on_each_cpu(hardware_disable, NULL, 0, 1);
cbdd1bea
CE		 3533 kvm_x86_ops->hardware_unsetup();
3534 kvm_x86_ops = NULL;
6aa8b732
AK		 3535}
3536
3537static __init int kvm_init(void)
3538{
3539 static struct page *bad_page;
37e29d90
AK		 3540 int r;
3541
b5a33a75
AK		 3542 r = kvm_mmu_module_init();
3543 if (r)
3544 goto out4;
3545
6aa8b732
AK		 3546 kvm_init_debug();
3547
bf591b24
MR		 3548 kvm_init_msr_list();
3549
6aa8b732
AK		 3550 if ((bad_page = alloc_page(GFP_KERNEL)) == NULL) {
3551 r = -ENOMEM;
3552 goto out;
3553 }
3554
3555 bad_page_address = page_to_pfn(bad_page) << PAGE_SHIFT;
3556 memset(__va(bad_page_address), 0, PAGE_SIZE);
3557
58e690e6 3558 return 0;
6aa8b732
AK		 3559
3560out:
3561 kvm_exit_debug();
b5a33a75
AK		 3562 kvm_mmu_module_exit();
3563out4:
6aa8b732
AK		 3564 return r;
3565}
3566
3567static __exit void kvm_exit(void)
3568{
3569 kvm_exit_debug();
3570 __free_page(pfn_to_page(bad_page_address >> PAGE_SHIFT));
b5a33a75 3571 kvm_mmu_module_exit();
6aa8b732
AK		 3572}
3573
3574module_init(kvm_init)
3575module_exit(kvm_exit)
3576
cbdd1bea
CE		 3577EXPORT_SYMBOL_GPL(kvm_init_x86);
3578EXPORT_SYMBOL_GPL(kvm_exit_x86);
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