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KVM: Add some \n in ioapic_debug()
[deliverable/linux.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"
043405e1 19#include "x86.h"
e495606d
AK		 20#include "x86_emulate.h"
21#include "segment_descriptor.h"
85f455f7 22#include "irq.h"
6aa8b732
AK		 23
24#include <linux/kvm.h>
25#include <linux/module.h>
26#include <linux/errno.h>
6aa8b732
AK		 27#include <linux/percpu.h>
28#include <linux/gfp.h>
6aa8b732
AK		 29#include <linux/mm.h>
30#include <linux/miscdevice.h>
31#include <linux/vmalloc.h>
6aa8b732 32#include <linux/reboot.h>
6aa8b732
AK		 33#include <linux/debugfs.h>
34#include <linux/highmem.h>
35#include <linux/file.h>
59ae6c6b 36#include <linux/sysdev.h>
774c47f1 37#include <linux/cpu.h>
e8edc6e0 38#include <linux/sched.h>
d9e368d6
AK		 39#include <linux/cpumask.h>
40#include <linux/smp.h>
d6d28168 41#include <linux/anon_inodes.h>
04d2cc77 42#include <linux/profile.h>
7aa81cc0 43#include <linux/kvm_para.h>
6fc138d2 44#include <linux/pagemap.h>
6aa8b732 45
e495606d
AK		 46#include <asm/processor.h>
47#include <asm/msr.h>
48#include <asm/io.h>
49#include <asm/uaccess.h>
50#include <asm/desc.h>
6aa8b732
AK		 51
52MODULE_AUTHOR("Qumranet");
53MODULE_LICENSE("GPL");
54
133de902
AK		 55static DEFINE_SPINLOCK(kvm_lock);
56static LIST_HEAD(vm_list);
57
1b6c0168
AK		 58static cpumask_t cpus_hardware_enabled;
59
cbdd1bea 60struct kvm_x86_ops *kvm_x86_ops;
c16f862d
RR		 61struct kmem_cache *kvm_vcpu_cache;
62EXPORT_SYMBOL_GPL(kvm_vcpu_cache);
1165f5fe 63
15ad7146
AK		 64static __read_mostly struct preempt_ops kvm_preempt_ops;
65
1165f5fe 66#define STAT_OFFSET(x) offsetof(struct kvm_vcpu, stat.x)
6aa8b732
AK		 67
68static struct kvm_stats_debugfs_item {
69 const char *name;
1165f5fe 70 int offset;
6aa8b732
AK		 71 struct dentry *dentry;
72} debugfs_entries[] = {
1165f5fe
AK		 73 { "pf_fixed", STAT_OFFSET(pf_fixed) },
74 { "pf_guest", STAT_OFFSET(pf_guest) },
75 { "tlb_flush", STAT_OFFSET(tlb_flush) },
76 { "invlpg", STAT_OFFSET(invlpg) },
77 { "exits", STAT_OFFSET(exits) },
78 { "io_exits", STAT_OFFSET(io_exits) },
79 { "mmio_exits", STAT_OFFSET(mmio_exits) },
80 { "signal_exits", STAT_OFFSET(signal_exits) },
81 { "irq_window", STAT_OFFSET(irq_window_exits) },
82 { "halt_exits", STAT_OFFSET(halt_exits) },
b6958ce4 83 { "halt_wakeup", STAT_OFFSET(halt_wakeup) },
1165f5fe
AK		 84 { "request_irq", STAT_OFFSET(request_irq_exits) },
85 { "irq_exits", STAT_OFFSET(irq_exits) },
e6adf283 86 { "light_exits", STAT_OFFSET(light_exits) },
2cc51560 87 { "efer_reload", STAT_OFFSET(efer_reload) },
1165f5fe 88 { NULL }
6aa8b732
AK		 89};
90
91static struct dentry *debugfs_dir;
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
d77c26fc 107/* LDT or TSS descriptor in the GDT. 16 bytes. */
6aa8b732
AK		 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;
6aa8b732
AK		 124 unsigned long v;
125
126 if (selector == 0)
127 return 0;
128
d77c26fc 129 asm("sgdt %0" : "=m"(gdt));
6aa8b732
AK		 130 table_base = gdt.base;
131
132 if (selector & 4) { /* from ldt */
133 u16 ldt_selector;
134
d77c26fc 135 asm("sldt %0" : "=g"(ldt_selector));
6aa8b732
AK		 136 table_base = segment_base(ldt_selector);
137 }
138 d = (struct segment_descriptor *)(table_base + (selector & ~7));
d77c26fc
MD		 139 v = d->base_low | ((unsigned long)d->base_mid << 16) |
140 ((unsigned long)d->base_high << 24);
05b3e0c2 141#ifdef CONFIG_X86_64
d77c26fc
MD		 142 if (d->system == 0 && (d->type == 2 || d->type == 9 || d->type == 11))
143 v |= ((unsigned long) \
144 ((struct segment_descriptor_64 *)d)->base_higher) << 32;
6aa8b732
AK		 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 */
313a3dc7 180void 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);
313a3dc7 187 kvm_arch_vcpu_load(vcpu, cpu);
15ad7146 188 put_cpu();
6aa8b732
AK		 189}
190
313a3dc7 191void vcpu_put(struct kvm_vcpu *vcpu)
6aa8b732 192{
15ad7146 193 preempt_disable();
313a3dc7 194 kvm_arch_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
76fafa5e
RR		 258 if (irqchip_in_kernel(kvm)) {
259 r = kvm_create_lapic(vcpu);
260 if (r < 0)
261 goto fail_mmu_destroy;
262 }
263
fb3f0f51
RR		 264 return 0;
265
76fafa5e
RR		 266fail_mmu_destroy:
267 kvm_mmu_destroy(vcpu);
fb3f0f51
RR		 268fail_free_pio_data:
269 free_page((unsigned long)vcpu->pio_data);
270fail_free_run:
271 free_page((unsigned long)vcpu->run);
272fail:
76fafa5e 273 return r;
fb3f0f51
RR		 274}
275EXPORT_SYMBOL_GPL(kvm_vcpu_init);
276
277void kvm_vcpu_uninit(struct kvm_vcpu *vcpu)
278{
d589444e 279 kvm_free_lapic(vcpu);
fb3f0f51
RR		 280 kvm_mmu_destroy(vcpu);
281 free_page((unsigned long)vcpu->pio_data);
282 free_page((unsigned long)vcpu->run);
283}
284EXPORT_SYMBOL_GPL(kvm_vcpu_uninit);
285
f17abe9a 286static struct kvm *kvm_create_vm(void)
6aa8b732
AK		 287{
288 struct kvm *kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
6aa8b732
AK		 289
290 if (!kvm)
f17abe9a 291 return ERR_PTR(-ENOMEM);
6aa8b732 292
74906345 293 kvm_io_bus_init(&kvm->pio_bus);
11ec2804 294 mutex_init(&kvm->lock);
6aa8b732 295 INIT_LIST_HEAD(&kvm->active_mmu_pages);
2eeb2e94 296 kvm_io_bus_init(&kvm->mmio_bus);
5e58cfe4
RR		 297 spin_lock(&kvm_lock);
298 list_add(&kvm->vm_list, &vm_list);
299 spin_unlock(&kvm_lock);
f17abe9a
AK		 300 return kvm;
301}
302
6fc138d2
IE		 303static void kvm_free_userspace_physmem(struct kvm_memory_slot *free)
304{
305 int i;
306
307 for (i = 0; i < free->npages; ++i) {
308 if (free->phys_mem[i]) {
309 if (!PageReserved(free->phys_mem[i]))
310 SetPageDirty(free->phys_mem[i]);
311 page_cache_release(free->phys_mem[i]);
312 }
313 }
314}
315
316static void kvm_free_kernel_physmem(struct kvm_memory_slot *free)
317{
318 int i;
319
320 for (i = 0; i < free->npages; ++i)
321 if (free->phys_mem[i])
322 __free_page(free->phys_mem[i]);
323}
324
6aa8b732
AK		 325/*
326 * Free any memory in @free but not in @dont.
327 */
328static void kvm_free_physmem_slot(struct kvm_memory_slot *free,
329 struct kvm_memory_slot *dont)
330{
6aa8b732
AK		 331 if (!dont || free->phys_mem != dont->phys_mem)
332 if (free->phys_mem) {
6fc138d2
IE		 333 if (free->user_alloc)
334 kvm_free_userspace_physmem(free);
335 else
336 kvm_free_kernel_physmem(free);
6aa8b732
AK		 337 vfree(free->phys_mem);
338 }
290fc38d
IE		 339 if (!dont || free->rmap != dont->rmap)
340 vfree(free->rmap);
6aa8b732
AK		 341
342 if (!dont || free->dirty_bitmap != dont->dirty_bitmap)
343 vfree(free->dirty_bitmap);
344
8b6d44c7 345 free->phys_mem = NULL;
6aa8b732 346 free->npages = 0;
8b6d44c7 347 free->dirty_bitmap = NULL;
6aa8b732
AK		 348}
349
350static void kvm_free_physmem(struct kvm *kvm)
351{
352 int i;
353
354 for (i = 0; i < kvm->nmemslots; ++i)
8b6d44c7 355 kvm_free_physmem_slot(&kvm->memslots[i], NULL);
6aa8b732
AK		 356}
357
039576c0
AK		 358static void free_pio_guest_pages(struct kvm_vcpu *vcpu)
359{
360 int i;
361
3077c451 362 for (i = 0; i < ARRAY_SIZE(vcpu->pio.guest_pages); ++i)
039576c0
AK		 363 if (vcpu->pio.guest_pages[i]) {
364 __free_page(vcpu->pio.guest_pages[i]);
365 vcpu->pio.guest_pages[i] = NULL;
366 }
367}
368
7b53aa56
AK		 369static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu)
370{
7b53aa56
AK		 371 vcpu_load(vcpu);
372 kvm_mmu_unload(vcpu);
373 vcpu_put(vcpu);
374}
375
6aa8b732
AK		 376static void kvm_free_vcpus(struct kvm *kvm)
377{
378 unsigned int i;
379
7b53aa56
AK		 380 /*
381 * Unpin any mmu pages first.
382 */
383 for (i = 0; i < KVM_MAX_VCPUS; ++i)
fb3f0f51
RR		 384 if (kvm->vcpus[i])
385 kvm_unload_vcpu_mmu(kvm->vcpus[i]);
386 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
387 if (kvm->vcpus[i]) {
cbdd1bea 388 kvm_x86_ops->vcpu_free(kvm->vcpus[i]);
fb3f0f51
RR		 389 kvm->vcpus[i] = NULL;
390 }
391 }
392
6aa8b732
AK		 393}
394
f17abe9a
AK		 395static void kvm_destroy_vm(struct kvm *kvm)
396{
133de902
AK		 397 spin_lock(&kvm_lock);
398 list_del(&kvm->vm_list);
399 spin_unlock(&kvm_lock);
74906345 400 kvm_io_bus_destroy(&kvm->pio_bus);
2eeb2e94 401 kvm_io_bus_destroy(&kvm->mmio_bus);
85f455f7 402 kfree(kvm->vpic);
1fd4f2a5 403 kfree(kvm->vioapic);
6aa8b732
AK		 404 kvm_free_vcpus(kvm);
405 kvm_free_physmem(kvm);
406 kfree(kvm);
f17abe9a
AK		 407}
408
409static int kvm_vm_release(struct inode *inode, struct file *filp)
410{
411 struct kvm *kvm = filp->private_data;
412
413 kvm_destroy_vm(kvm);
6aa8b732
AK		 414 return 0;
415}
416
417static void inject_gp(struct kvm_vcpu *vcpu)
418{
cbdd1bea 419 kvm_x86_ops->inject_gp(vcpu, 0);
6aa8b732
AK		 420}
421
1342d353
AK		 422/*
423 * Load the pae pdptrs. Return true is they are all valid.
424 */
425static int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3)
6aa8b732
AK		 426{
427 gfn_t pdpt_gfn = cr3 >> PAGE_SHIFT;
1342d353 428 unsigned offset = ((cr3 & (PAGE_SIZE-1)) >> 5) << 2;
6aa8b732 429 int i;
1342d353 430 int ret;
c820c2aa 431 u64 pdpte[ARRAY_SIZE(vcpu->pdptrs)];
6aa8b732 432
11ec2804 433 mutex_lock(&vcpu->kvm->lock);
195aefde
IE		 434 ret = kvm_read_guest_page(vcpu->kvm, pdpt_gfn, pdpte,
435 offset * sizeof(u64), sizeof(pdpte));
436 if (ret < 0) {
c820c2aa
RR		 437 ret = 0;
438 goto out;
439 }
c820c2aa
RR		 440 for (i = 0; i < ARRAY_SIZE(pdpte); ++i) {
441 if ((pdpte[i] & 1) && (pdpte[i] & 0xfffffff0000001e6ull)) {
1342d353
AK		 442 ret = 0;
443 goto out;
444 }
6aa8b732 445 }
c820c2aa 446 ret = 1;
6aa8b732 447
c820c2aa 448 memcpy(vcpu->pdptrs, pdpte, sizeof(vcpu->pdptrs));
1342d353 449out:
11ec2804 450 mutex_unlock(&vcpu->kvm->lock);
6aa8b732 451
1342d353 452 return ret;
6aa8b732
AK		 453}
454
455void set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
456{
707d92fa 457 if (cr0 & CR0_RESERVED_BITS) {
6aa8b732
AK		 458 printk(KERN_DEBUG "set_cr0: 0x%lx #GP, reserved bits 0x%lx\n",
459 cr0, vcpu->cr0);
460 inject_gp(vcpu);
461 return;
462 }
463
707d92fa 464 if ((cr0 & X86_CR0_NW) && !(cr0 & X86_CR0_CD)) {
6aa8b732
AK		 465 printk(KERN_DEBUG "set_cr0: #GP, CD == 0 && NW == 1\n");
466 inject_gp(vcpu);
467 return;
468 }
469
707d92fa 470 if ((cr0 & X86_CR0_PG) && !(cr0 & X86_CR0_PE)) {
6aa8b732
AK		 471 printk(KERN_DEBUG "set_cr0: #GP, set PG flag "
472 "and a clear PE flag\n");
473 inject_gp(vcpu);
474 return;
475 }
476
707d92fa 477 if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
05b3e0c2 478#ifdef CONFIG_X86_64
6aa8b732
AK		 479 if ((vcpu->shadow_efer & EFER_LME)) {
480 int cs_db, cs_l;
481
482 if (!is_pae(vcpu)) {
483 printk(KERN_DEBUG "set_cr0: #GP, start paging "
484 "in long mode while PAE is disabled\n");
485 inject_gp(vcpu);
486 return;
487 }
cbdd1bea 488 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
6aa8b732
AK		 489 if (cs_l) {
490 printk(KERN_DEBUG "set_cr0: #GP, start paging "
491 "in long mode while CS.L == 1\n");
492 inject_gp(vcpu);
493 return;
494
495 }
496 } else
497#endif
1342d353 498 if (is_pae(vcpu) && !load_pdptrs(vcpu, vcpu->cr3)) {
6aa8b732
AK		 499 printk(KERN_DEBUG "set_cr0: #GP, pdptrs "
500 "reserved bits\n");
501 inject_gp(vcpu);
502 return;
503 }
504
505 }
506
cbdd1bea 507 kvm_x86_ops->set_cr0(vcpu, cr0);
6aa8b732
AK		 508 vcpu->cr0 = cr0;
509
11ec2804 510 mutex_lock(&vcpu->kvm->lock);
6aa8b732 511 kvm_mmu_reset_context(vcpu);
11ec2804 512 mutex_unlock(&vcpu->kvm->lock);
6aa8b732
AK		 513 return;
514}
515EXPORT_SYMBOL_GPL(set_cr0);
516
517void lmsw(struct kvm_vcpu *vcpu, unsigned long msw)
518{
519 set_cr0(vcpu, (vcpu->cr0 & ~0x0ful) | (msw & 0x0f));
520}
521EXPORT_SYMBOL_GPL(lmsw);
522
523void set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
524{
66aee91a 525 if (cr4 & CR4_RESERVED_BITS) {
6aa8b732
AK		 526 printk(KERN_DEBUG "set_cr4: #GP, reserved bits\n");
527 inject_gp(vcpu);
528 return;
529 }
530
a9058ecd 531 if (is_long_mode(vcpu)) {
66aee91a 532 if (!(cr4 & X86_CR4_PAE)) {
6aa8b732
AK		 533 printk(KERN_DEBUG "set_cr4: #GP, clearing PAE while "
534 "in long mode\n");
535 inject_gp(vcpu);
536 return;
537 }
66aee91a 538 } else if (is_paging(vcpu) && !is_pae(vcpu) && (cr4 & X86_CR4_PAE)
1342d353 539 && !load_pdptrs(vcpu, vcpu->cr3)) {
6aa8b732
AK		 540 printk(KERN_DEBUG "set_cr4: #GP, pdptrs reserved bits\n");
541 inject_gp(vcpu);
310bc76c 542 return;
6aa8b732
AK		 543 }
544
66aee91a 545 if (cr4 & X86_CR4_VMXE) {
6aa8b732
AK		 546 printk(KERN_DEBUG "set_cr4: #GP, setting VMXE\n");
547 inject_gp(vcpu);
548 return;
549 }
cbdd1bea 550 kvm_x86_ops->set_cr4(vcpu, cr4);
81f50e3b 551 vcpu->cr4 = cr4;
11ec2804 552 mutex_lock(&vcpu->kvm->lock);
6aa8b732 553 kvm_mmu_reset_context(vcpu);
11ec2804 554 mutex_unlock(&vcpu->kvm->lock);
6aa8b732
AK		 555}
556EXPORT_SYMBOL_GPL(set_cr4);
557
558void set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
559{
a9058ecd 560 if (is_long_mode(vcpu)) {
f802a307 561 if (cr3 & CR3_L_MODE_RESERVED_BITS) {
6aa8b732
AK		 562 printk(KERN_DEBUG "set_cr3: #GP, reserved bits\n");
563 inject_gp(vcpu);
564 return;
565 }
566 } else {
f802a307
RR		 567 if (is_pae(vcpu)) {
568 if (cr3 & CR3_PAE_RESERVED_BITS) {
569 printk(KERN_DEBUG
570 "set_cr3: #GP, reserved bits\n");
571 inject_gp(vcpu);
572 return;
573 }
574 if (is_paging(vcpu) && !load_pdptrs(vcpu, cr3)) {
575 printk(KERN_DEBUG "set_cr3: #GP, pdptrs "
576 "reserved bits\n");
577 inject_gp(vcpu);
578 return;
579 }
6aa8b732 580 }
21764863
RH		 581 /*
582 * We don't check reserved bits in nonpae mode, because
583 * this isn't enforced, and VMware depends on this.
584 */
6aa8b732
AK		 585 }
586
11ec2804 587 mutex_lock(&vcpu->kvm->lock);
d21225ee
IM		 588 /*
589 * Does the new cr3 value map to physical memory? (Note, we
590 * catch an invalid cr3 even in real-mode, because it would
591 * cause trouble later on when we turn on paging anyway.)
592 *
593 * A real CPU would silently accept an invalid cr3 and would
594 * attempt to use it - with largely undefined (and often hard
595 * to debug) behavior on the guest side.
596 */
597 if (unlikely(!gfn_to_memslot(vcpu->kvm, cr3 >> PAGE_SHIFT)))
598 inject_gp(vcpu);
fb764416
RR		 599 else {
600 vcpu->cr3 = cr3;
d21225ee 601 vcpu->mmu.new_cr3(vcpu);
fb764416 602 }
11ec2804 603 mutex_unlock(&vcpu->kvm->lock);
6aa8b732
AK		 604}
605EXPORT_SYMBOL_GPL(set_cr3);
606
607void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8)
608{
7075bc81 609 if (cr8 & CR8_RESERVED_BITS) {
6aa8b732
AK		 610 printk(KERN_DEBUG "set_cr8: #GP, reserved bits 0x%lx\n", cr8);
611 inject_gp(vcpu);
612 return;
613 }
97222cc8
ED		 614 if (irqchip_in_kernel(vcpu->kvm))
615 kvm_lapic_set_tpr(vcpu, cr8);
616 else
617 vcpu->cr8 = cr8;
6aa8b732
AK		 618}
619EXPORT_SYMBOL_GPL(set_cr8);
620
7017fc3d
ED		 621unsigned long get_cr8(struct kvm_vcpu *vcpu)
622{
97222cc8
ED		 623 if (irqchip_in_kernel(vcpu->kvm))
624 return kvm_lapic_get_cr8(vcpu);
625 else
626 return vcpu->cr8;
7017fc3d
ED		 627}
628EXPORT_SYMBOL_GPL(get_cr8);
629
630u64 kvm_get_apic_base(struct kvm_vcpu *vcpu)
631{
97222cc8
ED		 632 if (irqchip_in_kernel(vcpu->kvm))
633 return vcpu->apic_base;
634 else
635 return vcpu->apic_base;
7017fc3d
ED		 636}
637EXPORT_SYMBOL_GPL(kvm_get_apic_base);
638
639void kvm_set_apic_base(struct kvm_vcpu *vcpu, u64 data)
640{
97222cc8
ED		 641 /* TODO: reserve bits check */
642 if (irqchip_in_kernel(vcpu->kvm))
643 kvm_lapic_set_base(vcpu, data);
644 else
645 vcpu->apic_base = data;
7017fc3d
ED		 646}
647EXPORT_SYMBOL_GPL(kvm_set_apic_base);
648
6aa8b732
AK		 649void fx_init(struct kvm_vcpu *vcpu)
650{
b114b080 651 unsigned after_mxcsr_mask;
6aa8b732 652
9bd01506
RR		 653 /* Initialize guest FPU by resetting ours and saving into guest's */
654 preempt_disable();
b114b080 655 fx_save(&vcpu->host_fx_image);
6aa8b732 656 fpu_init();
b114b080
RR		 657 fx_save(&vcpu->guest_fx_image);
658 fx_restore(&vcpu->host_fx_image);
9bd01506 659 preempt_enable();
6aa8b732 660
380102c8 661 vcpu->cr0 |= X86_CR0_ET;
b114b080
RR		 662 after_mxcsr_mask = offsetof(struct i387_fxsave_struct, st_space);
663 vcpu->guest_fx_image.mxcsr = 0x1f80;
664 memset((void *)&vcpu->guest_fx_image + after_mxcsr_mask,
665 0, sizeof(struct i387_fxsave_struct) - after_mxcsr_mask);
6aa8b732
AK		 666}
667EXPORT_SYMBOL_GPL(fx_init);
668
6aa8b732
AK		 669/*
670 * Allocate some memory and give it an address in the guest physical address
671 * space.
672 *
673 * Discontiguous memory is allowed, mostly for framebuffers.
674 */
2c6f5df9 675static int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
6fc138d2
IE		 676 struct
677 kvm_userspace_memory_region *mem,
678 int user_alloc)
6aa8b732
AK		 679{
680 int r;
681 gfn_t base_gfn;
682 unsigned long npages;
683 unsigned long i;
684 struct kvm_memory_slot *memslot;
685 struct kvm_memory_slot old, new;
6aa8b732
AK		 686
687 r = -EINVAL;
688 /* General sanity checks */
689 if (mem->memory_size & (PAGE_SIZE - 1))
690 goto out;
691 if (mem->guest_phys_addr & (PAGE_SIZE - 1))
692 goto out;
693 if (mem->slot >= KVM_MEMORY_SLOTS)
694 goto out;
695 if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr)
696 goto out;
697
698 memslot = &kvm->memslots[mem->slot];
699 base_gfn = mem->guest_phys_addr >> PAGE_SHIFT;
700 npages = mem->memory_size >> PAGE_SHIFT;
701
702 if (!npages)
703 mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES;
704
11ec2804 705 mutex_lock(&kvm->lock);
6aa8b732 706
6aa8b732
AK		 707 new = old = *memslot;
708
709 new.base_gfn = base_gfn;
710 new.npages = npages;
711 new.flags = mem->flags;
712
713 /* Disallow changing a memory slot's size. */
714 r = -EINVAL;
715 if (npages && old.npages && npages != old.npages)
716 goto out_unlock;
717
718 /* Check for overlaps */
719 r = -EEXIST;
720 for (i = 0; i < KVM_MEMORY_SLOTS; ++i) {
721 struct kvm_memory_slot *s = &kvm->memslots[i];
722
723 if (s == memslot)
724 continue;
725 if (!((base_gfn + npages <= s->base_gfn) ||
726 (base_gfn >= s->base_gfn + s->npages)))
727 goto out_unlock;
728 }
6aa8b732
AK		 729
730 /* Deallocate if slot is being removed */
731 if (!npages)
8b6d44c7 732 new.phys_mem = NULL;
6aa8b732
AK		 733
734 /* Free page dirty bitmap if unneeded */
735 if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES))
8b6d44c7 736 new.dirty_bitmap = NULL;
6aa8b732
AK		 737
738 r = -ENOMEM;
739
740 /* Allocate if a slot is being created */
741 if (npages && !new.phys_mem) {
742 new.phys_mem = vmalloc(npages * sizeof(struct page *));
743
744 if (!new.phys_mem)
0d8d2bd4 745 goto out_unlock;
6aa8b732 746
d77c26fc 747 new.rmap = vmalloc(npages * sizeof(struct page *));
290fc38d
IE		 748
749 if (!new.rmap)
750 goto out_unlock;
751
6aa8b732 752 memset(new.phys_mem, 0, npages * sizeof(struct page *));
290fc38d 753 memset(new.rmap, 0, npages * sizeof(*new.rmap));
6fc138d2
IE		 754 if (user_alloc) {
755 unsigned long pages_num;
756
757 new.user_alloc = 1;
758 down_read(&current->mm->mmap_sem);
759
760 pages_num = get_user_pages(current, current->mm,
761 mem->userspace_addr,
762 npages, 1, 1, new.phys_mem,
763 NULL);
764
765 up_read(&current->mm->mmap_sem);
766 if (pages_num != npages)
0d8d2bd4 767 goto out_unlock;
6fc138d2
IE		 768 } else {
769 for (i = 0; i < npages; ++i) {
770 new.phys_mem[i] = alloc_page(GFP_HIGHUSER
771 | __GFP_ZERO);
772 if (!new.phys_mem[i])
773 goto out_unlock;
774 }
6aa8b732
AK		 775 }
776 }
777
778 /* Allocate page dirty bitmap if needed */
779 if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) {
780 unsigned dirty_bytes = ALIGN(npages, BITS_PER_LONG) / 8;
781
782 new.dirty_bitmap = vmalloc(dirty_bytes);
783 if (!new.dirty_bitmap)
0d8d2bd4 784 goto out_unlock;
6aa8b732
AK		 785 memset(new.dirty_bitmap, 0, dirty_bytes);
786 }
787
6aa8b732
AK		 788 if (mem->slot >= kvm->nmemslots)
789 kvm->nmemslots = mem->slot + 1;
790
82ce2c96
IE		 791 if (!kvm->n_requested_mmu_pages) {
792 unsigned int n_pages;
793
794 if (npages) {
795 n_pages = npages * KVM_PERMILLE_MMU_PAGES / 1000;
796 kvm_mmu_change_mmu_pages(kvm, kvm->n_alloc_mmu_pages +
797 n_pages);
798 } else {
799 unsigned int nr_mmu_pages;
800
801 n_pages = old.npages * KVM_PERMILLE_MMU_PAGES / 1000;
802 nr_mmu_pages = kvm->n_alloc_mmu_pages - n_pages;
803 nr_mmu_pages = max(nr_mmu_pages,
804 (unsigned int) KVM_MIN_ALLOC_MMU_PAGES);
805 kvm_mmu_change_mmu_pages(kvm, nr_mmu_pages);
806 }
807 }
808
6aa8b732 809 *memslot = new;
6aa8b732 810
90cb0529
AK		 811 kvm_mmu_slot_remove_write_access(kvm, mem->slot);
812 kvm_flush_remote_tlbs(kvm);
6aa8b732 813
11ec2804 814 mutex_unlock(&kvm->lock);
6aa8b732
AK		 815
816 kvm_free_physmem_slot(&old, &new);
817 return 0;
818
819out_unlock:
11ec2804 820 mutex_unlock(&kvm->lock);
6aa8b732
AK		 821 kvm_free_physmem_slot(&new, &old);
822out:
823 return r;
824}
825
82ce2c96
IE		 826static int kvm_vm_ioctl_set_nr_mmu_pages(struct kvm *kvm,
827 u32 kvm_nr_mmu_pages)
828{
829 if (kvm_nr_mmu_pages < KVM_MIN_ALLOC_MMU_PAGES)
830 return -EINVAL;
831
832 mutex_lock(&kvm->lock);
833
834 kvm_mmu_change_mmu_pages(kvm, kvm_nr_mmu_pages);
835 kvm->n_requested_mmu_pages = kvm_nr_mmu_pages;
836
837 mutex_unlock(&kvm->lock);
838 return 0;
839}
840
841static int kvm_vm_ioctl_get_nr_mmu_pages(struct kvm *kvm)
842{
843 return kvm->n_alloc_mmu_pages;
844}
845
6aa8b732
AK		 846/*
847 * Get (and clear) the dirty memory log for a memory slot.
848 */
2c6f5df9
AK		 849static int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
850 struct kvm_dirty_log *log)
6aa8b732
AK		 851{
852 struct kvm_memory_slot *memslot;
853 int r, i;
854 int n;
855 unsigned long any = 0;
856
11ec2804 857 mutex_lock(&kvm->lock);
6aa8b732 858
6aa8b732
AK		 859 r = -EINVAL;
860 if (log->slot >= KVM_MEMORY_SLOTS)
861 goto out;
862
863 memslot = &kvm->memslots[log->slot];
864 r = -ENOENT;
865 if (!memslot->dirty_bitmap)
866 goto out;
867
cd1a4a98 868 n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
6aa8b732 869
cd1a4a98 870 for (i = 0; !any && i < n/sizeof(long); ++i)
6aa8b732
AK		 871 any = memslot->dirty_bitmap[i];
872
873 r = -EFAULT;
874 if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n))
875 goto out;
876
39214915
RR		 877 /* If nothing is dirty, don't bother messing with page tables. */
878 if (any) {
39214915
RR		 879 kvm_mmu_slot_remove_write_access(kvm, log->slot);
880 kvm_flush_remote_tlbs(kvm);
881 memset(memslot->dirty_bitmap, 0, n);
39214915 882 }
6aa8b732
AK		 883
884 r = 0;
885
886out:
11ec2804 887 mutex_unlock(&kvm->lock);
6aa8b732
AK		 888 return r;
889}
890
e8207547
AK		 891/*
892 * Set a new alias region. Aliases map a portion of physical memory into
893 * another portion. This is useful for memory windows, for example the PC
894 * VGA region.
895 */
896static int kvm_vm_ioctl_set_memory_alias(struct kvm *kvm,
897 struct kvm_memory_alias *alias)
898{
899 int r, n;
900 struct kvm_mem_alias *p;
901
902 r = -EINVAL;
903 /* General sanity checks */
904 if (alias->memory_size & (PAGE_SIZE - 1))
905 goto out;
906 if (alias->guest_phys_addr & (PAGE_SIZE - 1))
907 goto out;
908 if (alias->slot >= KVM_ALIAS_SLOTS)
909 goto out;
910 if (alias->guest_phys_addr + alias->memory_size
911 < alias->guest_phys_addr)
912 goto out;
913 if (alias->target_phys_addr + alias->memory_size
914 < alias->target_phys_addr)
915 goto out;
916
11ec2804 917 mutex_lock(&kvm->lock);
e8207547
AK		 918
919 p = &kvm->aliases[alias->slot];
920 p->base_gfn = alias->guest_phys_addr >> PAGE_SHIFT;
921 p->npages = alias->memory_size >> PAGE_SHIFT;
922 p->target_gfn = alias->target_phys_addr >> PAGE_SHIFT;
923
924 for (n = KVM_ALIAS_SLOTS; n > 0; --n)
925 if (kvm->aliases[n - 1].npages)
926 break;
927 kvm->naliases = n;
928
90cb0529 929 kvm_mmu_zap_all(kvm);
e8207547 930
11ec2804 931 mutex_unlock(&kvm->lock);
e8207547
AK		 932
933 return 0;
934
935out:
936 return r;
937}
938
6ceb9d79
HQ		 939static int kvm_vm_ioctl_get_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
940{
941 int r;
942
943 r = 0;
944 switch (chip->chip_id) {
945 case KVM_IRQCHIP_PIC_MASTER:
d77c26fc 946 memcpy(&chip->chip.pic,
6ceb9d79
HQ		 947 &pic_irqchip(kvm)->pics[0],
948 sizeof(struct kvm_pic_state));
949 break;
950 case KVM_IRQCHIP_PIC_SLAVE:
d77c26fc 951 memcpy(&chip->chip.pic,
6ceb9d79
HQ		 952 &pic_irqchip(kvm)->pics[1],
953 sizeof(struct kvm_pic_state));
954 break;
6bf9e962 955 case KVM_IRQCHIP_IOAPIC:
d77c26fc 956 memcpy(&chip->chip.ioapic,
6bf9e962
HQ		 957 ioapic_irqchip(kvm),
958 sizeof(struct kvm_ioapic_state));
959 break;
6ceb9d79
HQ		 960 default:
961 r = -EINVAL;
962 break;
963 }
964 return r;
965}
966
967static int kvm_vm_ioctl_set_irqchip(struct kvm *kvm, struct kvm_irqchip *chip)
968{
969 int r;
970
971 r = 0;
972 switch (chip->chip_id) {
973 case KVM_IRQCHIP_PIC_MASTER:
d77c26fc 974 memcpy(&pic_irqchip(kvm)->pics[0],
6ceb9d79
HQ		 975 &chip->chip.pic,
976 sizeof(struct kvm_pic_state));
977 break;
978 case KVM_IRQCHIP_PIC_SLAVE:
d77c26fc 979 memcpy(&pic_irqchip(kvm)->pics[1],
6ceb9d79
HQ		 980 &chip->chip.pic,
981 sizeof(struct kvm_pic_state));
982 break;
6bf9e962 983 case KVM_IRQCHIP_IOAPIC:
d77c26fc 984 memcpy(ioapic_irqchip(kvm),
6bf9e962
HQ		 985 &chip->chip.ioapic,
986 sizeof(struct kvm_ioapic_state));
987 break;
6ceb9d79
HQ		 988 default:
989 r = -EINVAL;
990 break;
991 }
992 kvm_pic_update_irq(pic_irqchip(kvm));
993 return r;
994}
995
290fc38d 996gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
e8207547
AK		 997{
998 int i;
999 struct kvm_mem_alias *alias;
1000
1001 for (i = 0; i < kvm->naliases; ++i) {
1002 alias = &kvm->aliases[i];
1003 if (gfn >= alias->base_gfn
1004 && gfn < alias->base_gfn + alias->npages)
1005 return alias->target_gfn + gfn - alias->base_gfn;
1006 }
1007 return gfn;
1008}
1009
1010static struct kvm_memory_slot *__gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
6aa8b732
AK		 1011{
1012 int i;
1013
1014 for (i = 0; i < kvm->nmemslots; ++i) {
1015 struct kvm_memory_slot *memslot = &kvm->memslots[i];
1016
1017 if (gfn >= memslot->base_gfn
1018 && gfn < memslot->base_gfn + memslot->npages)
1019 return memslot;
1020 }
8b6d44c7 1021 return NULL;
6aa8b732 1022}
e8207547
AK		 1023
1024struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
1025{
1026 gfn = unalias_gfn(kvm, gfn);
1027 return __gfn_to_memslot(kvm, gfn);
1028}
6aa8b732 1029
954bbbc2
AK		 1030struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn)
1031{
1032 struct kvm_memory_slot *slot;
1033
e8207547
AK		 1034 gfn = unalias_gfn(kvm, gfn);
1035 slot = __gfn_to_memslot(kvm, gfn);
954bbbc2
AK		 1036 if (!slot)
1037 return NULL;
1038 return slot->phys_mem[gfn - slot->base_gfn];
1039}
1040EXPORT_SYMBOL_GPL(gfn_to_page);
1041
195aefde
IE		 1042static int next_segment(unsigned long len, int offset)
1043{
1044 if (len > PAGE_SIZE - offset)
1045 return PAGE_SIZE - offset;
1046 else
1047 return len;
1048}
1049
1050int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
1051 int len)
1052{
1053 void *page_virt;
1054 struct page *page;
1055
1056 page = gfn_to_page(kvm, gfn);
1057 if (!page)
1058 return -EFAULT;
1059 page_virt = kmap_atomic(page, KM_USER0);
1060
1061 memcpy(data, page_virt + offset, len);
1062
1063 kunmap_atomic(page_virt, KM_USER0);
1064 return 0;
1065}
1066EXPORT_SYMBOL_GPL(kvm_read_guest_page);
1067
1068int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len)
1069{
1070 gfn_t gfn = gpa >> PAGE_SHIFT;
1071 int seg;
1072 int offset = offset_in_page(gpa);
1073 int ret;
1074
1075 while ((seg = next_segment(len, offset)) != 0) {
1076 ret = kvm_read_guest_page(kvm, gfn, data, offset, seg);
1077 if (ret < 0)
1078 return ret;
1079 offset = 0;
1080 len -= seg;
1081 data += seg;
1082 ++gfn;
1083 }
1084 return 0;
1085}
1086EXPORT_SYMBOL_GPL(kvm_read_guest);
1087
1088int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
1089 int offset, int len)
1090{
1091 void *page_virt;
1092 struct page *page;
1093
1094 page = gfn_to_page(kvm, gfn);
1095 if (!page)
1096 return -EFAULT;
1097 page_virt = kmap_atomic(page, KM_USER0);
1098
1099 memcpy(page_virt + offset, data, len);
1100
1101 kunmap_atomic(page_virt, KM_USER0);
1102 mark_page_dirty(kvm, gfn);
1103 return 0;
1104}
1105EXPORT_SYMBOL_GPL(kvm_write_guest_page);
1106
1107int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
1108 unsigned long len)
1109{
1110 gfn_t gfn = gpa >> PAGE_SHIFT;
1111 int seg;
1112 int offset = offset_in_page(gpa);
1113 int ret;
1114
1115 while ((seg = next_segment(len, offset)) != 0) {
1116 ret = kvm_write_guest_page(kvm, gfn, data, offset, seg);
1117 if (ret < 0)
1118 return ret;
1119 offset = 0;
1120 len -= seg;
1121 data += seg;
1122 ++gfn;
1123 }
1124 return 0;
1125}
1126
1127int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len)
1128{
1129 void *page_virt;
1130 struct page *page;
1131
1132 page = gfn_to_page(kvm, gfn);
1133 if (!page)
1134 return -EFAULT;
1135 page_virt = kmap_atomic(page, KM_USER0);
1136
1137 memset(page_virt + offset, 0, len);
1138
1139 kunmap_atomic(page_virt, KM_USER0);
1140 return 0;
1141}
1142EXPORT_SYMBOL_GPL(kvm_clear_guest_page);
1143
1144int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len)
1145{
1146 gfn_t gfn = gpa >> PAGE_SHIFT;
1147 int seg;
1148 int offset = offset_in_page(gpa);
1149 int ret;
1150
1151 while ((seg = next_segment(len, offset)) != 0) {
1152 ret = kvm_clear_guest_page(kvm, gfn, offset, seg);
1153 if (ret < 0)
1154 return ret;
1155 offset = 0;
1156 len -= seg;
1157 ++gfn;
1158 }
1159 return 0;
1160}
1161EXPORT_SYMBOL_GPL(kvm_clear_guest);
1162
7e9d619d 1163/* WARNING: Does not work on aliased pages. */
6aa8b732
AK		 1164void mark_page_dirty(struct kvm *kvm, gfn_t gfn)
1165{
31389947 1166 struct kvm_memory_slot *memslot;
6aa8b732 1167
7e9d619d
RR		 1168 memslot = __gfn_to_memslot(kvm, gfn);
1169 if (memslot && memslot->dirty_bitmap) {
1170 unsigned long rel_gfn = gfn - memslot->base_gfn;
6aa8b732 1171
7e9d619d
RR		 1172 /* avoid RMW */
1173 if (!test_bit(rel_gfn, memslot->dirty_bitmap))
1174 set_bit(rel_gfn, memslot->dirty_bitmap);
6aa8b732
AK		 1175 }
1176}
1177
e7d5d76c 1178int emulator_read_std(unsigned long addr,
4c690a1e 1179 void *val,
6aa8b732 1180 unsigned int bytes,
cebff02b 1181 struct kvm_vcpu *vcpu)
6aa8b732 1182{
6aa8b732
AK		 1183 void *data = val;
1184
1185 while (bytes) {
1186 gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
1187 unsigned offset = addr & (PAGE_SIZE-1);
1188 unsigned tocopy = min(bytes, (unsigned)PAGE_SIZE - offset);
195aefde 1189 int ret;
6aa8b732
AK		 1190
1191 if (gpa == UNMAPPED_GVA)
1192 return X86EMUL_PROPAGATE_FAULT;
195aefde
IE		 1193 ret = kvm_read_guest(vcpu->kvm, gpa, data, tocopy);
1194 if (ret < 0)
6aa8b732 1195 return X86EMUL_UNHANDLEABLE;
6aa8b732
AK		 1196
1197 bytes -= tocopy;
1198 data += tocopy;
1199 addr += tocopy;
1200 }
1201
1202 return X86EMUL_CONTINUE;
1203}
e7d5d76c 1204EXPORT_SYMBOL_GPL(emulator_read_std);
6aa8b732
AK		 1205
1206static int emulator_write_std(unsigned long addr,
4c690a1e 1207 const void *val,
6aa8b732 1208 unsigned int bytes,
cebff02b 1209 struct kvm_vcpu *vcpu)
6aa8b732 1210{
f0242478 1211 pr_unimpl(vcpu, "emulator_write_std: addr %lx n %d\n", addr, bytes);
6aa8b732
AK		 1212 return X86EMUL_UNHANDLEABLE;
1213}
1214
97222cc8
ED		 1215/*
1216 * Only apic need an MMIO device hook, so shortcut now..
1217 */
1218static struct kvm_io_device *vcpu_find_pervcpu_dev(struct kvm_vcpu *vcpu,
1219 gpa_t addr)
1220{
1221 struct kvm_io_device *dev;
1222
1223 if (vcpu->apic) {
1224 dev = &vcpu->apic->dev;
1225 if (dev->in_range(dev, addr))
1226 return dev;
1227 }
1228 return NULL;
1229}
1230
2eeb2e94
GH		 1231static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu,
1232 gpa_t addr)
1233{
97222cc8
ED		 1234 struct kvm_io_device *dev;
1235
1236 dev = vcpu_find_pervcpu_dev(vcpu, addr);
1237 if (dev == NULL)
1238 dev = kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr);
1239 return dev;
2eeb2e94
GH		 1240}
1241
74906345
ED		 1242static struct kvm_io_device *vcpu_find_pio_dev(struct kvm_vcpu *vcpu,
1243 gpa_t addr)
1244{
1245 return kvm_io_bus_find_dev(&vcpu->kvm->pio_bus, addr);
1246}
1247
6aa8b732 1248static int emulator_read_emulated(unsigned long addr,
4c690a1e 1249 void *val,
6aa8b732 1250 unsigned int bytes,
cebff02b 1251 struct kvm_vcpu *vcpu)
6aa8b732 1252{
2eeb2e94
GH		 1253 struct kvm_io_device *mmio_dev;
1254 gpa_t gpa;
6aa8b732
AK		 1255
1256 if (vcpu->mmio_read_completed) {
1257 memcpy(val, vcpu->mmio_data, bytes);
1258 vcpu->mmio_read_completed = 0;
1259 return X86EMUL_CONTINUE;
cebff02b 1260 } else if (emulator_read_std(addr, val, bytes, vcpu)
6aa8b732
AK		 1261 == X86EMUL_CONTINUE)
1262 return X86EMUL_CONTINUE;
d27d4aca 1263
2eeb2e94
GH		 1264 gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
1265 if (gpa == UNMAPPED_GVA)
1266 return X86EMUL_PROPAGATE_FAULT;
6aa8b732 1267
2eeb2e94
GH		 1268 /*
1269 * Is this MMIO handled locally?
1270 */
1271 mmio_dev = vcpu_find_mmio_dev(vcpu, gpa);
1272 if (mmio_dev) {
1273 kvm_iodevice_read(mmio_dev, gpa, bytes, val);
1274 return X86EMUL_CONTINUE;
6aa8b732 1275 }
2eeb2e94
GH		 1276
1277 vcpu->mmio_needed = 1;
1278 vcpu->mmio_phys_addr = gpa;
1279 vcpu->mmio_size = bytes;
1280 vcpu->mmio_is_write = 0;
1281
1282 return X86EMUL_UNHANDLEABLE;
6aa8b732
AK		 1283}
1284
da4a00f0 1285static int emulator_write_phys(struct kvm_vcpu *vcpu, gpa_t gpa,
4c690a1e 1286 const void *val, int bytes)
da4a00f0 1287{
195aefde 1288 int ret;
da4a00f0 1289
195aefde
IE		 1290 ret = kvm_write_guest(vcpu->kvm, gpa, val, bytes);
1291 if (ret < 0)
da4a00f0 1292 return 0;
fe551881 1293 kvm_mmu_pte_write(vcpu, gpa, val, bytes);
da4a00f0
AK		 1294 return 1;
1295}
1296
b0fcd903
AK		 1297static int emulator_write_emulated_onepage(unsigned long addr,
1298 const void *val,
1299 unsigned int bytes,
cebff02b 1300 struct kvm_vcpu *vcpu)
6aa8b732 1301{
2eeb2e94
GH		 1302 struct kvm_io_device *mmio_dev;
1303 gpa_t gpa = vcpu->mmu.gva_to_gpa(vcpu, addr);
6aa8b732 1304
c9047f53 1305 if (gpa == UNMAPPED_GVA) {
cbdd1bea 1306 kvm_x86_ops->inject_page_fault(vcpu, addr, 2);
6aa8b732 1307 return X86EMUL_PROPAGATE_FAULT;
c9047f53 1308 }
6aa8b732 1309
da4a00f0
AK		 1310 if (emulator_write_phys(vcpu, gpa, val, bytes))
1311 return X86EMUL_CONTINUE;
1312
2eeb2e94
GH		 1313 /*
1314 * Is this MMIO handled locally?
1315 */
1316 mmio_dev = vcpu_find_mmio_dev(vcpu, gpa);
1317 if (mmio_dev) {
1318 kvm_iodevice_write(mmio_dev, gpa, bytes, val);
1319 return X86EMUL_CONTINUE;
1320 }
1321
6aa8b732
AK		 1322 vcpu->mmio_needed = 1;
1323 vcpu->mmio_phys_addr = gpa;
1324 vcpu->mmio_size = bytes;
1325 vcpu->mmio_is_write = 1;
4c690a1e 1326 memcpy(vcpu->mmio_data, val, bytes);
6aa8b732
AK		 1327
1328 return X86EMUL_CONTINUE;
1329}
1330
e7d5d76c 1331int emulator_write_emulated(unsigned long addr,
b0fcd903
AK		 1332 const void *val,
1333 unsigned int bytes,
cebff02b 1334 struct kvm_vcpu *vcpu)
b0fcd903
AK		 1335{
1336 /* Crossing a page boundary? */
1337 if (((addr + bytes - 1) ^ addr) & PAGE_MASK) {
1338 int rc, now;
1339
1340 now = -addr & ~PAGE_MASK;
cebff02b 1341 rc = emulator_write_emulated_onepage(addr, val, now, vcpu);
b0fcd903
AK		 1342 if (rc != X86EMUL_CONTINUE)
1343 return rc;
1344 addr += now;
1345 val += now;
1346 bytes -= now;
1347 }
cebff02b 1348 return emulator_write_emulated_onepage(addr, val, bytes, vcpu);
b0fcd903 1349}
e7d5d76c 1350EXPORT_SYMBOL_GPL(emulator_write_emulated);
b0fcd903 1351
6aa8b732 1352static int emulator_cmpxchg_emulated(unsigned long addr,
4c690a1e
AK		 1353 const void *old,
1354 const void *new,
6aa8b732 1355 unsigned int bytes,
cebff02b 1356 struct kvm_vcpu *vcpu)
6aa8b732
AK		 1357{
1358 static int reported;
1359
1360 if (!reported) {
1361 reported = 1;
1362 printk(KERN_WARNING "kvm: emulating exchange as write\n");
1363 }
cebff02b 1364 return emulator_write_emulated(addr, new, bytes, vcpu);
6aa8b732
AK		 1365}
1366
1367static unsigned long get_segment_base(struct kvm_vcpu *vcpu, int seg)
1368{
cbdd1bea 1369 return kvm_x86_ops->get_segment_base(vcpu, seg);
6aa8b732
AK		 1370}
1371
1372int emulate_invlpg(struct kvm_vcpu *vcpu, gva_t address)
1373{
6aa8b732
AK		 1374 return X86EMUL_CONTINUE;
1375}
1376
1377int emulate_clts(struct kvm_vcpu *vcpu)
1378{
404fb881 1379 kvm_x86_ops->set_cr0(vcpu, vcpu->cr0 & ~X86_CR0_TS);
6aa8b732
AK		 1380 return X86EMUL_CONTINUE;
1381}
1382
d77c26fc 1383int emulator_get_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long *dest)
6aa8b732
AK		 1384{
1385 struct kvm_vcpu *vcpu = ctxt->vcpu;
1386
1387 switch (dr) {
1388 case 0 ... 3:
cbdd1bea 1389 *dest = kvm_x86_ops->get_dr(vcpu, dr);
6aa8b732
AK		 1390 return X86EMUL_CONTINUE;
1391 default:
f0242478 1392 pr_unimpl(vcpu, "%s: unexpected dr %u\n", __FUNCTION__, dr);
6aa8b732
AK		 1393 return X86EMUL_UNHANDLEABLE;
1394 }
1395}
1396
1397int emulator_set_dr(struct x86_emulate_ctxt *ctxt, int dr, unsigned long value)
1398{
1399 unsigned long mask = (ctxt->mode == X86EMUL_MODE_PROT64) ? ~0ULL : ~0U;
1400 int exception;
1401
cbdd1bea 1402 kvm_x86_ops->set_dr(ctxt->vcpu, dr, value & mask, &exception);
6aa8b732
AK		 1403 if (exception) {
1404 /* FIXME: better handling */
1405 return X86EMUL_UNHANDLEABLE;
1406 }
1407 return X86EMUL_CONTINUE;
1408}
1409
054b1369 1410void kvm_report_emulation_failure(struct kvm_vcpu *vcpu, const char *context)
6aa8b732
AK		 1411{
1412 static int reported;
1413 u8 opcodes[4];
054b1369 1414 unsigned long rip = vcpu->rip;
6aa8b732
AK		 1415 unsigned long rip_linear;
1416
054b1369 1417 rip_linear = rip + get_segment_base(vcpu, VCPU_SREG_CS);
6aa8b732
AK		 1418
1419 if (reported)
1420 return;
1421
054b1369 1422 emulator_read_std(rip_linear, (void *)opcodes, 4, vcpu);
6aa8b732 1423
054b1369
AK		 1424 printk(KERN_ERR "emulation failed (%s) rip %lx %02x %02x %02x %02x\n",
1425 context, rip, opcodes[0], opcodes[1], opcodes[2], opcodes[3]);
6aa8b732
AK		 1426 reported = 1;
1427}
054b1369 1428EXPORT_SYMBOL_GPL(kvm_report_emulation_failure);
6aa8b732
AK		 1429
1430struct x86_emulate_ops emulate_ops = {
1431 .read_std = emulator_read_std,
1432 .write_std = emulator_write_std,
1433 .read_emulated = emulator_read_emulated,
1434 .write_emulated = emulator_write_emulated,
1435 .cmpxchg_emulated = emulator_cmpxchg_emulated,
1436};
1437
1438int emulate_instruction(struct kvm_vcpu *vcpu,
1439 struct kvm_run *run,
1440 unsigned long cr2,
3427318f
LV		 1441 u16 error_code,
1442 int no_decode)
6aa8b732 1443{
a22436b7 1444 int r;
6aa8b732 1445
e7df56e4 1446 vcpu->mmio_fault_cr2 = cr2;
cbdd1bea 1447 kvm_x86_ops->cache_regs(vcpu);
6aa8b732 1448
6aa8b732 1449 vcpu->mmio_is_write = 0;
e70669ab 1450 vcpu->pio.string = 0;
3427318f
LV		 1451
1452 if (!no_decode) {
1453 int cs_db, cs_l;
1454 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l);
1455
1456 vcpu->emulate_ctxt.vcpu = vcpu;
1457 vcpu->emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu);
1458 vcpu->emulate_ctxt.cr2 = cr2;
1459 vcpu->emulate_ctxt.mode =
1460 (vcpu->emulate_ctxt.eflags & X86_EFLAGS_VM)
1461 ? X86EMUL_MODE_REAL : cs_l
1462 ? X86EMUL_MODE_PROT64 : cs_db
1463 ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16;
1464
1465 if (vcpu->emulate_ctxt.mode == X86EMUL_MODE_PROT64) {
1466 vcpu->emulate_ctxt.cs_base = 0;
1467 vcpu->emulate_ctxt.ds_base = 0;
1468 vcpu->emulate_ctxt.es_base = 0;
1469 vcpu->emulate_ctxt.ss_base = 0;
1470 } else {
1471 vcpu->emulate_ctxt.cs_base =
1472 get_segment_base(vcpu, VCPU_SREG_CS);
1473 vcpu->emulate_ctxt.ds_base =
1474 get_segment_base(vcpu, VCPU_SREG_DS);
1475 vcpu->emulate_ctxt.es_base =
1476 get_segment_base(vcpu, VCPU_SREG_ES);
1477 vcpu->emulate_ctxt.ss_base =
1478 get_segment_base(vcpu, VCPU_SREG_SS);
1479 }
1480
1481 vcpu->emulate_ctxt.gs_base =
1482 get_segment_base(vcpu, VCPU_SREG_GS);
1483 vcpu->emulate_ctxt.fs_base =
1484 get_segment_base(vcpu, VCPU_SREG_FS);
1485
1486 r = x86_decode_insn(&vcpu->emulate_ctxt, &emulate_ops);
a22436b7
LV		 1487 if (r) {
1488 if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
1489 return EMULATE_DONE;
1490 return EMULATE_FAIL;
1491 }
3427318f
LV		 1492 }
1493
a22436b7 1494 r = x86_emulate_insn(&vcpu->emulate_ctxt, &emulate_ops);
1be3aa47 1495
e70669ab
LV		 1496 if (vcpu->pio.string)
1497 return EMULATE_DO_MMIO;
6aa8b732
AK		 1498
1499 if ((r || vcpu->mmio_is_write) && run) {
8fc0d085 1500 run->exit_reason = KVM_EXIT_MMIO;
6aa8b732
AK		 1501 run->mmio.phys_addr = vcpu->mmio_phys_addr;
1502 memcpy(run->mmio.data, vcpu->mmio_data, 8);
1503 run->mmio.len = vcpu->mmio_size;
1504 run->mmio.is_write = vcpu->mmio_is_write;
1505 }
1506
1507 if (r) {
a436036b
AK		 1508 if (kvm_mmu_unprotect_page_virt(vcpu, cr2))
1509 return EMULATE_DONE;
6aa8b732 1510 if (!vcpu->mmio_needed) {
054b1369 1511 kvm_report_emulation_failure(vcpu, "mmio");
6aa8b732
AK		 1512 return EMULATE_FAIL;
1513 }
1514 return EMULATE_DO_MMIO;
1515 }
1516
cbdd1bea 1517 kvm_x86_ops->decache_regs(vcpu);
3427318f 1518 kvm_x86_ops->set_rflags(vcpu, vcpu->emulate_ctxt.eflags);
6aa8b732 1519
02c83209
AK		 1520 if (vcpu->mmio_is_write) {
1521 vcpu->mmio_needed = 0;
6aa8b732 1522 return EMULATE_DO_MMIO;
02c83209 1523 }
6aa8b732
AK		 1524
1525 return EMULATE_DONE;
1526}
1527EXPORT_SYMBOL_GPL(emulate_instruction);
1528
b6958ce4
ED		 1529/*
1530 * The vCPU has executed a HLT instruction with in-kernel mode enabled.
1531 */
c5ec1534 1532static void kvm_vcpu_block(struct kvm_vcpu *vcpu)
d3bef15f 1533{
b6958ce4
ED		 1534 DECLARE_WAITQUEUE(wait, current);
1535
1536 add_wait_queue(&vcpu->wq, &wait);
1537
1538 /*
1539 * We will block until either an interrupt or a signal wakes us up
1540 */
c5ec1534
HQ		 1541 while (!kvm_cpu_has_interrupt(vcpu)
1542 && !signal_pending(current)
1543 && vcpu->mp_state != VCPU_MP_STATE_RUNNABLE
1544 && vcpu->mp_state != VCPU_MP_STATE_SIPI_RECEIVED) {
b6958ce4
ED		 1545 set_current_state(TASK_INTERRUPTIBLE);
1546 vcpu_put(vcpu);
1547 schedule();
1548 vcpu_load(vcpu);
1549 }
d3bef15f 1550
c5ec1534 1551 __set_current_state(TASK_RUNNING);
b6958ce4 1552 remove_wait_queue(&vcpu->wq, &wait);
b6958ce4
ED		 1553}
1554
1555int kvm_emulate_halt(struct kvm_vcpu *vcpu)
1556{
d3bef15f 1557 ++vcpu->stat.halt_exits;
b6958ce4 1558 if (irqchip_in_kernel(vcpu->kvm)) {
c5ec1534
HQ		 1559 vcpu->mp_state = VCPU_MP_STATE_HALTED;
1560 kvm_vcpu_block(vcpu);
1561 if (vcpu->mp_state != VCPU_MP_STATE_RUNNABLE)
1562 return -EINTR;
b6958ce4
ED		 1563 return 1;
1564 } else {
1565 vcpu->run->exit_reason = KVM_EXIT_HLT;
1566 return 0;
1567 }
d3bef15f
AK		 1568}
1569EXPORT_SYMBOL_GPL(kvm_emulate_halt);
1570
7aa81cc0 1571int kvm_emulate_hypercall(struct kvm_vcpu *vcpu)
270fd9b9 1572{
7aa81cc0 1573 unsigned long nr, a0, a1, a2, a3, ret;
270fd9b9 1574
cbdd1bea 1575 kvm_x86_ops->cache_regs(vcpu);
7aa81cc0
AL		 1576
1577 nr = vcpu->regs[VCPU_REGS_RAX];
1578 a0 = vcpu->regs[VCPU_REGS_RBX];
1579 a1 = vcpu->regs[VCPU_REGS_RCX];
1580 a2 = vcpu->regs[VCPU_REGS_RDX];
1581 a3 = vcpu->regs[VCPU_REGS_RSI];
1582
1583 if (!is_long_mode(vcpu)) {
1584 nr &= 0xFFFFFFFF;
1585 a0 &= 0xFFFFFFFF;
1586 a1 &= 0xFFFFFFFF;
1587 a2 &= 0xFFFFFFFF;
1588 a3 &= 0xFFFFFFFF;
270fd9b9 1589 }
7aa81cc0 1590
270fd9b9
AK		 1591 switch (nr) {
1592 default:
7aa81cc0
AL		 1593 ret = -KVM_ENOSYS;
1594 break;
270fd9b9
AK		 1595 }
1596 vcpu->regs[VCPU_REGS_RAX] = ret;
cbdd1bea 1597 kvm_x86_ops->decache_regs(vcpu);
7aa81cc0
AL		 1598 return 0;
1599}
1600EXPORT_SYMBOL_GPL(kvm_emulate_hypercall);
1601
1602int kvm_fix_hypercall(struct kvm_vcpu *vcpu)
1603{
1604 char instruction[3];
1605 int ret = 0;
1606
1607 mutex_lock(&vcpu->kvm->lock);
1608
1609 /*
1610 * Blow out the MMU to ensure that no other VCPU has an active mapping
1611 * to ensure that the updated hypercall appears atomically across all
1612 * VCPUs.
1613 */
1614 kvm_mmu_zap_all(vcpu->kvm);
1615
1616 kvm_x86_ops->cache_regs(vcpu);
1617 kvm_x86_ops->patch_hypercall(vcpu, instruction);
1618 if (emulator_write_emulated(vcpu->rip, instruction, 3, vcpu)
1619 != X86EMUL_CONTINUE)
1620 ret = -EFAULT;
1621
1622 mutex_unlock(&vcpu->kvm->lock);
1623
1624 return ret;
270fd9b9 1625}
270fd9b9 1626
6aa8b732
AK		 1627static u64 mk_cr_64(u64 curr_cr, u32 new_val)
1628{
1629 return (curr_cr & ~((1ULL << 32) - 1)) | new_val;
1630}
1631
1632void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
1633{
1634 struct descriptor_table dt = { limit, base };
1635
cbdd1bea 1636 kvm_x86_ops->set_gdt(vcpu, &dt);
6aa8b732
AK		 1637}
1638
1639void realmode_lidt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
1640{
1641 struct descriptor_table dt = { limit, base };
1642
cbdd1bea 1643 kvm_x86_ops->set_idt(vcpu, &dt);
6aa8b732
AK		 1644}
1645
1646void realmode_lmsw(struct kvm_vcpu *vcpu, unsigned long msw,
1647 unsigned long *rflags)
1648{
1649 lmsw(vcpu, msw);
cbdd1bea 1650 *rflags = kvm_x86_ops->get_rflags(vcpu);
6aa8b732
AK		 1651}
1652
1653unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr)
1654{
cbdd1bea 1655 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
6aa8b732
AK		 1656 switch (cr) {
1657 case 0:
1658 return vcpu->cr0;
1659 case 2:
1660 return vcpu->cr2;
1661 case 3:
1662 return vcpu->cr3;
1663 case 4:
1664 return vcpu->cr4;
1665 default:
1666 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
1667 return 0;
1668 }
1669}
1670
1671void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val,
1672 unsigned long *rflags)
1673{
1674 switch (cr) {
1675 case 0:
1676 set_cr0(vcpu, mk_cr_64(vcpu->cr0, val));
cbdd1bea 1677 *rflags = kvm_x86_ops->get_rflags(vcpu);
6aa8b732
AK		 1678 break;
1679 case 2:
1680 vcpu->cr2 = val;
1681 break;
1682 case 3:
1683 set_cr3(vcpu, val);
1684 break;
1685 case 4:
1686 set_cr4(vcpu, mk_cr_64(vcpu->cr4, val));
1687 break;
1688 default:
1689 vcpu_printf(vcpu, "%s: unexpected cr %u\n", __FUNCTION__, cr);
1690 }
1691}
1692
3bab1f5d
AK		 1693int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
1694{
1695 u64 data;
1696
1697 switch (msr) {
1698 case 0xc0010010: /* SYSCFG */
1699 case 0xc0010015: /* HWCR */
1700 case MSR_IA32_PLATFORM_ID:
1701 case MSR_IA32_P5_MC_ADDR:
1702 case MSR_IA32_P5_MC_TYPE:
1703 case MSR_IA32_MC0_CTL:
1704 case MSR_IA32_MCG_STATUS:
1705 case MSR_IA32_MCG_CAP:
1706 case MSR_IA32_MC0_MISC:
1707 case MSR_IA32_MC0_MISC+4:
1708 case MSR_IA32_MC0_MISC+8:
1709 case MSR_IA32_MC0_MISC+12:
1710 case MSR_IA32_MC0_MISC+16:
1711 case MSR_IA32_UCODE_REV:
a8d13ea2 1712 case MSR_IA32_PERF_STATUS:
2dc7094b 1713 case MSR_IA32_EBL_CR_POWERON:
3bab1f5d
AK		 1714 /* MTRR registers */
1715 case 0xfe:
1716 case 0x200 ... 0x2ff:
1717 data = 0;
1718 break;
a8d13ea2
AK		 1719 case 0xcd: /* fsb frequency */
1720 data = 3;
1721 break;
3bab1f5d 1722 case MSR_IA32_APICBASE:
7017fc3d 1723 data = kvm_get_apic_base(vcpu);
3bab1f5d 1724 break;
6f00e68f
AK		 1725 case MSR_IA32_MISC_ENABLE:
1726 data = vcpu->ia32_misc_enable_msr;
1727 break;
3bab1f5d
AK		 1728#ifdef CONFIG_X86_64
1729 case MSR_EFER:
1730 data = vcpu->shadow_efer;
1731 break;
1732#endif
1733 default:
f0242478 1734 pr_unimpl(vcpu, "unhandled rdmsr: 0x%x\n", msr);
3bab1f5d
AK		 1735 return 1;
1736 }
1737 *pdata = data;
1738 return 0;
1739}
1740EXPORT_SYMBOL_GPL(kvm_get_msr_common);
1741
6aa8b732
AK		 1742/*
1743 * Reads an msr value (of 'msr_index') into 'pdata'.
1744 * Returns 0 on success, non-0 otherwise.
1745 * Assumes vcpu_load() was already called.
1746 */
35f3f286 1747int kvm_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
6aa8b732 1748{
cbdd1bea 1749 return kvm_x86_ops->get_msr(vcpu, msr_index, pdata);
6aa8b732
AK		 1750}
1751
05b3e0c2 1752#ifdef CONFIG_X86_64
6aa8b732 1753
3bab1f5d 1754static void set_efer(struct kvm_vcpu *vcpu, u64 efer)
6aa8b732 1755{
6aa8b732
AK		 1756 if (efer & EFER_RESERVED_BITS) {
1757 printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n",
1758 efer);
1759 inject_gp(vcpu);
1760 return;
1761 }
1762
1763 if (is_paging(vcpu)
1764 && (vcpu->shadow_efer & EFER_LME) != (efer & EFER_LME)) {
1765 printk(KERN_DEBUG "set_efer: #GP, change LME while paging\n");
1766 inject_gp(vcpu);
1767 return;
1768 }
1769
cbdd1bea 1770 kvm_x86_ops->set_efer(vcpu, efer);
7725f0ba 1771
6aa8b732
AK		 1772 efer &= ~EFER_LMA;
1773 efer |= vcpu->shadow_efer & EFER_LMA;
1774
1775 vcpu->shadow_efer = efer;
6aa8b732 1776}
6aa8b732
AK		 1777
1778#endif
1779
3bab1f5d
AK		 1780int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
1781{
1782 switch (msr) {
1783#ifdef CONFIG_X86_64
1784 case MSR_EFER:
1785 set_efer(vcpu, data);
1786 break;
1787#endif
1788 case MSR_IA32_MC0_STATUS:
f0242478 1789 pr_unimpl(vcpu, "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n",
3bab1f5d
AK		 1790 __FUNCTION__, data);
1791 break;
0e5bf0d0 1792 case MSR_IA32_MCG_STATUS:
f0242478 1793 pr_unimpl(vcpu, "%s: MSR_IA32_MCG_STATUS 0x%llx, nop\n",
0e5bf0d0
SK		 1794 __FUNCTION__, data);
1795 break;
3bab1f5d
AK		 1796 case MSR_IA32_UCODE_REV:
1797 case MSR_IA32_UCODE_WRITE:
1798 case 0x200 ... 0x2ff: /* MTRRs */
1799 break;
1800 case MSR_IA32_APICBASE:
7017fc3d 1801 kvm_set_apic_base(vcpu, data);
3bab1f5d 1802 break;
6f00e68f
AK		 1803 case MSR_IA32_MISC_ENABLE:
1804 vcpu->ia32_misc_enable_msr = data;
1805 break;
3bab1f5d 1806 default:
f0242478 1807 pr_unimpl(vcpu, "unhandled wrmsr: 0x%x\n", msr);
3bab1f5d
AK		 1808 return 1;
1809 }
1810 return 0;
1811}
1812EXPORT_SYMBOL_GPL(kvm_set_msr_common);
1813
6aa8b732
AK		 1814/*
1815 * Writes msr value into into the appropriate "register".
1816 * Returns 0 on success, non-0 otherwise.
1817 * Assumes vcpu_load() was already called.
1818 */
35f3f286 1819int kvm_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
6aa8b732 1820{
cbdd1bea 1821 return kvm_x86_ops->set_msr(vcpu, msr_index, data);
6aa8b732
AK		 1822}
1823
1824void kvm_resched(struct kvm_vcpu *vcpu)
1825{
3fca0365
YD		 1826 if (!need_resched())
1827 return;
6aa8b732 1828 cond_resched();
6aa8b732
AK		 1829}
1830EXPORT_SYMBOL_GPL(kvm_resched);
1831
06465c5a
AK		 1832void kvm_emulate_cpuid(struct kvm_vcpu *vcpu)
1833{
1834 int i;
1835 u32 function;
1836 struct kvm_cpuid_entry *e, *best;
1837
cbdd1bea 1838 kvm_x86_ops->cache_regs(vcpu);
06465c5a
AK		 1839 function = vcpu->regs[VCPU_REGS_RAX];
1840 vcpu->regs[VCPU_REGS_RAX] = 0;
1841 vcpu->regs[VCPU_REGS_RBX] = 0;
1842 vcpu->regs[VCPU_REGS_RCX] = 0;
1843 vcpu->regs[VCPU_REGS_RDX] = 0;
1844 best = NULL;
1845 for (i = 0; i < vcpu->cpuid_nent; ++i) {
1846 e = &vcpu->cpuid_entries[i];
1847 if (e->function == function) {
1848 best = e;
1849 break;
1850 }
1851 /*
1852 * Both basic or both extended?
1853 */
1854 if (((e->function ^ function) & 0x80000000) == 0)
1855 if (!best || e->function > best->function)
1856 best = e;
1857 }
1858 if (best) {
1859 vcpu->regs[VCPU_REGS_RAX] = best->eax;
1860 vcpu->regs[VCPU_REGS_RBX] = best->ebx;
1861 vcpu->regs[VCPU_REGS_RCX] = best->ecx;
1862 vcpu->regs[VCPU_REGS_RDX] = best->edx;
1863 }
cbdd1bea
CE		 1864 kvm_x86_ops->decache_regs(vcpu);
1865 kvm_x86_ops->skip_emulated_instruction(vcpu);
06465c5a
AK		 1866}
1867EXPORT_SYMBOL_GPL(kvm_emulate_cpuid);
1868
039576c0 1869static int pio_copy_data(struct kvm_vcpu *vcpu)
46fc1477 1870{
039576c0
AK		 1871 void *p = vcpu->pio_data;
1872 void *q;
1873 unsigned bytes;
1874 int nr_pages = vcpu->pio.guest_pages[1] ? 2 : 1;
1875
039576c0
AK		 1876 q = vmap(vcpu->pio.guest_pages, nr_pages, VM_READ|VM_WRITE,
1877 PAGE_KERNEL);
1878 if (!q) {
039576c0
AK		 1879 free_pio_guest_pages(vcpu);
1880 return -ENOMEM;
1881 }
1882 q += vcpu->pio.guest_page_offset;
1883 bytes = vcpu->pio.size * vcpu->pio.cur_count;
1884 if (vcpu->pio.in)
1885 memcpy(q, p, bytes);
1886 else
1887 memcpy(p, q, bytes);
1888 q -= vcpu->pio.guest_page_offset;
1889 vunmap(q);
039576c0
AK		 1890 free_pio_guest_pages(vcpu);
1891 return 0;
1892}
1893
1894static int complete_pio(struct kvm_vcpu *vcpu)
1895{
1896 struct kvm_pio_request *io = &vcpu->pio;
46fc1477 1897 long delta;
039576c0 1898 int r;
46fc1477 1899
cbdd1bea 1900 kvm_x86_ops->cache_regs(vcpu);
46fc1477
AK		 1901
1902 if (!io->string) {
039576c0
AK		 1903 if (io->in)
1904 memcpy(&vcpu->regs[VCPU_REGS_RAX], vcpu->pio_data,
46fc1477
AK		 1905 io->size);
1906 } else {
039576c0
AK		 1907 if (io->in) {
1908 r = pio_copy_data(vcpu);
1909 if (r) {
cbdd1bea 1910 kvm_x86_ops->cache_regs(vcpu);
039576c0
AK		 1911 return r;
1912 }
1913 }
1914
46fc1477
AK		 1915 delta = 1;
1916 if (io->rep) {
039576c0 1917 delta *= io->cur_count;
46fc1477
AK		 1918 /*
1919 * The size of the register should really depend on
1920 * current address size.
1921 */
1922 vcpu->regs[VCPU_REGS_RCX] -= delta;
1923 }
039576c0 1924 if (io->down)
46fc1477
AK		 1925 delta = -delta;
1926 delta *= io->size;
039576c0 1927 if (io->in)
46fc1477
AK		 1928 vcpu->regs[VCPU_REGS_RDI] += delta;
1929 else
1930 vcpu->regs[VCPU_REGS_RSI] += delta;
1931 }
1932
cbdd1bea 1933 kvm_x86_ops->decache_regs(vcpu);
46fc1477 1934
039576c0
AK		 1935 io->count -= io->cur_count;
1936 io->cur_count = 0;
1937
039576c0 1938 return 0;
46fc1477
AK		 1939}
1940
65619eb5
ED		 1941static void kernel_pio(struct kvm_io_device *pio_dev,
1942 struct kvm_vcpu *vcpu,
1943 void *pd)
74906345
ED		 1944{
1945 /* TODO: String I/O for in kernel device */
1946
9cf98828 1947 mutex_lock(&vcpu->kvm->lock);
74906345
ED		 1948 if (vcpu->pio.in)
1949 kvm_iodevice_read(pio_dev, vcpu->pio.port,
1950 vcpu->pio.size,
65619eb5 1951 pd);
74906345
ED		 1952 else
1953 kvm_iodevice_write(pio_dev, vcpu->pio.port,
1954 vcpu->pio.size,
65619eb5 1955 pd);
9cf98828 1956 mutex_unlock(&vcpu->kvm->lock);
65619eb5
ED		 1957}
1958
1959static void pio_string_write(struct kvm_io_device *pio_dev,
1960 struct kvm_vcpu *vcpu)
1961{
1962 struct kvm_pio_request *io = &vcpu->pio;
1963 void *pd = vcpu->pio_data;
1964 int i;
1965
9cf98828 1966 mutex_lock(&vcpu->kvm->lock);
65619eb5
ED		 1967 for (i = 0; i < io->cur_count; i++) {
1968 kvm_iodevice_write(pio_dev, io->port,
1969 io->size,
1970 pd);
1971 pd += io->size;
1972 }
9cf98828 1973 mutex_unlock(&vcpu->kvm->lock);
74906345
ED		 1974}
1975
d77c26fc 1976int kvm_emulate_pio(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
3090dd73
LV		 1977 int size, unsigned port)
1978{
1979 struct kvm_io_device *pio_dev;
1980
1981 vcpu->run->exit_reason = KVM_EXIT_IO;
1982 vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
1983 vcpu->run->io.size = vcpu->pio.size = size;
1984 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
1985 vcpu->run->io.count = vcpu->pio.count = vcpu->pio.cur_count = 1;
1986 vcpu->run->io.port = vcpu->pio.port = port;
1987 vcpu->pio.in = in;
1988 vcpu->pio.string = 0;
1989 vcpu->pio.down = 0;
1990 vcpu->pio.guest_page_offset = 0;
1991 vcpu->pio.rep = 0;
1992
cbdd1bea 1993 kvm_x86_ops->cache_regs(vcpu);
3090dd73 1994 memcpy(vcpu->pio_data, &vcpu->regs[VCPU_REGS_RAX], 4);
cbdd1bea 1995 kvm_x86_ops->decache_regs(vcpu);
3090dd73 1996
0967b7bf
AK		 1997 kvm_x86_ops->skip_emulated_instruction(vcpu);
1998
3090dd73
LV		 1999 pio_dev = vcpu_find_pio_dev(vcpu, port);
2000 if (pio_dev) {
2001 kernel_pio(pio_dev, vcpu, vcpu->pio_data);
2002 complete_pio(vcpu);
2003 return 1;
2004 }
2005 return 0;
2006}
2007EXPORT_SYMBOL_GPL(kvm_emulate_pio);
2008
2009int kvm_emulate_pio_string(struct kvm_vcpu *vcpu, struct kvm_run *run, int in,
2010 int size, unsigned long count, int down,
039576c0
AK		 2011 gva_t address, int rep, unsigned port)
2012{
2013 unsigned now, in_page;
65619eb5 2014 int i, ret = 0;
039576c0
AK		 2015 int nr_pages = 1;
2016 struct page *page;
74906345 2017 struct kvm_io_device *pio_dev;
039576c0
AK		 2018
2019 vcpu->run->exit_reason = KVM_EXIT_IO;
2020 vcpu->run->io.direction = in ? KVM_EXIT_IO_IN : KVM_EXIT_IO_OUT;
3090dd73 2021 vcpu->run->io.size = vcpu->pio.size = size;
039576c0 2022 vcpu->run->io.data_offset = KVM_PIO_PAGE_OFFSET * PAGE_SIZE;
3090dd73
LV		 2023 vcpu->run->io.count = vcpu->pio.count = vcpu->pio.cur_count = count;
2024 vcpu->run->io.port = vcpu->pio.port = port;
039576c0 2025 vcpu->pio.in = in;
3090dd73 2026 vcpu->pio.string = 1;
039576c0
AK		 2027 vcpu->pio.down = down;
2028 vcpu->pio.guest_page_offset = offset_in_page(address);
2029 vcpu->pio.rep = rep;
2030
039576c0 2031 if (!count) {
cbdd1bea 2032 kvm_x86_ops->skip_emulated_instruction(vcpu);
039576c0
AK		 2033 return 1;
2034 }
2035
039576c0
AK		 2036 if (!down)
2037 in_page = PAGE_SIZE - offset_in_page(address);
2038 else
2039 in_page = offset_in_page(address) + size;
2040 now = min(count, (unsigned long)in_page / size);
2041 if (!now) {
2042 /*
2043 * String I/O straddles page boundary. Pin two guest pages
2044 * so that we satisfy atomicity constraints. Do just one
2045 * transaction to avoid complexity.
2046 */
2047 nr_pages = 2;
2048 now = 1;
2049 }
2050 if (down) {
2051 /*
2052 * String I/O in reverse. Yuck. Kill the guest, fix later.
2053 */
f0242478 2054 pr_unimpl(vcpu, "guest string pio down\n");
039576c0
AK		 2055 inject_gp(vcpu);
2056 return 1;
2057 }
2058 vcpu->run->io.count = now;
2059 vcpu->pio.cur_count = now;
2060
0967b7bf
AK		 2061 if (vcpu->pio.cur_count == vcpu->pio.count)
2062 kvm_x86_ops->skip_emulated_instruction(vcpu);
2063
039576c0 2064 for (i = 0; i < nr_pages; ++i) {
11ec2804 2065 mutex_lock(&vcpu->kvm->lock);
039576c0
AK		 2066 page = gva_to_page(vcpu, address + i * PAGE_SIZE);
2067 if (page)
2068 get_page(page);
2069 vcpu->pio.guest_pages[i] = page;
11ec2804 2070 mutex_unlock(&vcpu->kvm->lock);
039576c0
AK		 2071 if (!page) {
2072 inject_gp(vcpu);
2073 free_pio_guest_pages(vcpu);
2074 return 1;
2075 }
2076 }
2077
3090dd73 2078 pio_dev = vcpu_find_pio_dev(vcpu, port);
65619eb5
ED		 2079 if (!vcpu->pio.in) {
2080 /* string PIO write */
2081 ret = pio_copy_data(vcpu);
2082 if (ret >= 0 && pio_dev) {
2083 pio_string_write(pio_dev, vcpu);
2084 complete_pio(vcpu);
2085 if (vcpu->pio.count == 0)
2086 ret = 1;
2087 }
2088 } else if (pio_dev)
f0242478 2089 pr_unimpl(vcpu, "no string pio read support yet, "
65619eb5
ED		 2090 "port %x size %d count %ld\n",
2091 port, size, count);
2092
2093 return ret;
039576c0 2094}
3090dd73 2095EXPORT_SYMBOL_GPL(kvm_emulate_pio_string);
039576c0 2096
04d2cc77
AK		 2097/*
2098 * Check if userspace requested an interrupt window, and that the
2099 * interrupt window is open.
2100 *
2101 * No need to exit to userspace if we already have an interrupt queued.
2102 */
2103static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu,
2104 struct kvm_run *kvm_run)
2105{
2106 return (!vcpu->irq_summary &&
2107 kvm_run->request_interrupt_window &&
2108 vcpu->interrupt_window_open &&
2109 (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF));
2110}
2111
2112static void post_kvm_run_save(struct kvm_vcpu *vcpu,
2113 struct kvm_run *kvm_run)
2114{
2115 kvm_run->if_flag = (kvm_x86_ops->get_rflags(vcpu) & X86_EFLAGS_IF) != 0;
2116 kvm_run->cr8 = get_cr8(vcpu);
2117 kvm_run->apic_base = kvm_get_apic_base(vcpu);
2118 if (irqchip_in_kernel(vcpu->kvm))
2119 kvm_run->ready_for_interrupt_injection = 1;
2120 else
2121 kvm_run->ready_for_interrupt_injection =
2122 (vcpu->interrupt_window_open &&
2123 vcpu->irq_summary == 0);
2124}
2125
2126static int __vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
2127{
2128 int r;
2129
2130 if (unlikely(vcpu->mp_state == VCPU_MP_STATE_SIPI_RECEIVED)) {
d77c26fc 2131 pr_debug("vcpu %d received sipi with vector # %x\n",
04d2cc77
AK		 2132 vcpu->vcpu_id, vcpu->sipi_vector);
2133 kvm_lapic_reset(vcpu);
2134 kvm_x86_ops->vcpu_reset(vcpu);
2135 vcpu->mp_state = VCPU_MP_STATE_RUNNABLE;
2136 }
2137
2138preempted:
2139 if (vcpu->guest_debug.enabled)
2140 kvm_x86_ops->guest_debug_pre(vcpu);
2141
2142again:
2143 r = kvm_mmu_reload(vcpu);
2144 if (unlikely(r))
2145 goto out;
2146
2147 preempt_disable();
2148
2149 kvm_x86_ops->prepare_guest_switch(vcpu);
2150 kvm_load_guest_fpu(vcpu);
2151
2152 local_irq_disable();
2153
2154 if (signal_pending(current)) {
2155 local_irq_enable();
2156 preempt_enable();
2157 r = -EINTR;
2158 kvm_run->exit_reason = KVM_EXIT_INTR;
2159 ++vcpu->stat.signal_exits;
2160 goto out;
2161 }
2162
2163 if (irqchip_in_kernel(vcpu->kvm))
2164 kvm_x86_ops->inject_pending_irq(vcpu);
2165 else if (!vcpu->mmio_read_completed)
2166 kvm_x86_ops->inject_pending_vectors(vcpu, kvm_run);
2167
2168 vcpu->guest_mode = 1;
d172fcd3 2169 kvm_guest_enter();
04d2cc77
AK		 2170
2171 if (vcpu->requests)
2172 if (test_and_clear_bit(KVM_TLB_FLUSH, &vcpu->requests))
2173 kvm_x86_ops->tlb_flush(vcpu);
2174
2175 kvm_x86_ops->run(vcpu, kvm_run);
2176
2177 vcpu->guest_mode = 0;
2178 local_irq_enable();
2179
2180 ++vcpu->stat.exits;
2181
0552f73b
LV		 2182 /*
2183 * We must have an instruction between local_irq_enable() and
2184 * kvm_guest_exit(), so the timer interrupt isn't delayed by
2185 * the interrupt shadow. The stat.exits increment will do nicely.
2186 * But we need to prevent reordering, hence this barrier():
2187 */
2188 barrier();
2189
2190 kvm_guest_exit();
2191
04d2cc77
AK		 2192 preempt_enable();
2193
2194 /*
2195 * Profile KVM exit RIPs:
2196 */
2197 if (unlikely(prof_on == KVM_PROFILING)) {
2198 kvm_x86_ops->cache_regs(vcpu);
2199 profile_hit(KVM_PROFILING, (void *)vcpu->rip);
2200 }
2201
2202 r = kvm_x86_ops->handle_exit(kvm_run, vcpu);
2203
2204 if (r > 0) {
2205 if (dm_request_for_irq_injection(vcpu, kvm_run)) {
2206 r = -EINTR;
2207 kvm_run->exit_reason = KVM_EXIT_INTR;
2208 ++vcpu->stat.request_irq_exits;
2209 goto out;
2210 }
2211 if (!need_resched()) {
2212 ++vcpu->stat.light_exits;
2213 goto again;
2214 }
2215 }
2216
2217out:
2218 if (r > 0) {
2219 kvm_resched(vcpu);
2220 goto preempted;
2221 }
2222
2223 post_kvm_run_save(vcpu, kvm_run);
2224
2225 return r;
2226}
2227
2228
bccf2150 2229static int kvm_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
6aa8b732 2230{
6aa8b732 2231 int r;
1961d276 2232 sigset_t sigsaved;
6aa8b732 2233
bccf2150 2234 vcpu_load(vcpu);
6aa8b732 2235
c5ec1534
HQ		 2236 if (unlikely(vcpu->mp_state == VCPU_MP_STATE_UNINITIALIZED)) {
2237 kvm_vcpu_block(vcpu);
2238 vcpu_put(vcpu);
2239 return -EAGAIN;
2240 }
2241
1961d276
AK		 2242 if (vcpu->sigset_active)
2243 sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
2244
54810342 2245 /* re-sync apic's tpr */
5cd4f6fd
HQ		 2246 if (!irqchip_in_kernel(vcpu->kvm))
2247 set_cr8(vcpu, kvm_run->cr8);
54810342 2248
02c83209
AK		 2249 if (vcpu->pio.cur_count) {
2250 r = complete_pio(vcpu);
2251 if (r)
2252 goto out;
2253 }
2254
2255 if (vcpu->mmio_needed) {
2256 memcpy(vcpu->mmio_data, kvm_run->mmio.data, 8);
2257 vcpu->mmio_read_completed = 1;
2258 vcpu->mmio_needed = 0;
2259 r = emulate_instruction(vcpu, kvm_run,
3427318f 2260 vcpu->mmio_fault_cr2, 0, 1);
02c83209
AK		 2261 if (r == EMULATE_DO_MMIO) {
2262 /*
2263 * Read-modify-write. Back to userspace.
2264 */
02c83209
AK		 2265 r = 0;
2266 goto out;
46fc1477 2267 }
6aa8b732
AK		 2268 }
2269
8eb7d334 2270 if (kvm_run->exit_reason == KVM_EXIT_HYPERCALL) {
cbdd1bea 2271 kvm_x86_ops->cache_regs(vcpu);
b4e63f56 2272 vcpu->regs[VCPU_REGS_RAX] = kvm_run->hypercall.ret;
cbdd1bea 2273 kvm_x86_ops->decache_regs(vcpu);
b4e63f56
AK		 2274 }
2275
04d2cc77 2276 r = __vcpu_run(vcpu, kvm_run);
6aa8b732 2277
039576c0 2278out:
1961d276
AK		 2279 if (vcpu->sigset_active)
2280 sigprocmask(SIG_SETMASK, &sigsaved, NULL);
2281
6aa8b732
AK		 2282 vcpu_put(vcpu);
2283 return r;
2284}
2285
bccf2150
AK		 2286static int kvm_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu,
2287 struct kvm_regs *regs)
6aa8b732 2288{
bccf2150 2289 vcpu_load(vcpu);
6aa8b732 2290
cbdd1bea 2291 kvm_x86_ops->cache_regs(vcpu);
6aa8b732
AK		 2292
2293 regs->rax = vcpu->regs[VCPU_REGS_RAX];
2294 regs->rbx = vcpu->regs[VCPU_REGS_RBX];
2295 regs->rcx = vcpu->regs[VCPU_REGS_RCX];
2296 regs->rdx = vcpu->regs[VCPU_REGS_RDX];
2297 regs->rsi = vcpu->regs[VCPU_REGS_RSI];
2298 regs->rdi = vcpu->regs[VCPU_REGS_RDI];
2299 regs->rsp = vcpu->regs[VCPU_REGS_RSP];
2300 regs->rbp = vcpu->regs[VCPU_REGS_RBP];
05b3e0c2 2301#ifdef CONFIG_X86_64
6aa8b732
AK		 2302 regs->r8 = vcpu->regs[VCPU_REGS_R8];
2303 regs->r9 = vcpu->regs[VCPU_REGS_R9];
2304 regs->r10 = vcpu->regs[VCPU_REGS_R10];
2305 regs->r11 = vcpu->regs[VCPU_REGS_R11];
2306 regs->r12 = vcpu->regs[VCPU_REGS_R12];
2307 regs->r13 = vcpu->regs[VCPU_REGS_R13];
2308 regs->r14 = vcpu->regs[VCPU_REGS_R14];
2309 regs->r15 = vcpu->regs[VCPU_REGS_R15];
2310#endif
2311
2312 regs->rip = vcpu->rip;
cbdd1bea 2313 regs->rflags = kvm_x86_ops->get_rflags(vcpu);
6aa8b732
AK		 2314
2315 /*
2316 * Don't leak debug flags in case they were set for guest debugging
2317 */
2318 if (vcpu->guest_debug.enabled && vcpu->guest_debug.singlestep)
2319 regs->rflags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
2320
2321 vcpu_put(vcpu);
2322
2323 return 0;
2324}
2325
bccf2150
AK		 2326static int kvm_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu,
2327 struct kvm_regs *regs)
6aa8b732 2328{
bccf2150 2329 vcpu_load(vcpu);
6aa8b732
AK		 2330
2331 vcpu->regs[VCPU_REGS_RAX] = regs->rax;
2332 vcpu->regs[VCPU_REGS_RBX] = regs->rbx;
2333 vcpu->regs[VCPU_REGS_RCX] = regs->rcx;
2334 vcpu->regs[VCPU_REGS_RDX] = regs->rdx;
2335 vcpu->regs[VCPU_REGS_RSI] = regs->rsi;
2336 vcpu->regs[VCPU_REGS_RDI] = regs->rdi;
2337 vcpu->regs[VCPU_REGS_RSP] = regs->rsp;
2338 vcpu->regs[VCPU_REGS_RBP] = regs->rbp;
05b3e0c2 2339#ifdef CONFIG_X86_64
6aa8b732
AK		 2340 vcpu->regs[VCPU_REGS_R8] = regs->r8;
2341 vcpu->regs[VCPU_REGS_R9] = regs->r9;
2342 vcpu->regs[VCPU_REGS_R10] = regs->r10;
2343 vcpu->regs[VCPU_REGS_R11] = regs->r11;
2344 vcpu->regs[VCPU_REGS_R12] = regs->r12;
2345 vcpu->regs[VCPU_REGS_R13] = regs->r13;
2346 vcpu->regs[VCPU_REGS_R14] = regs->r14;
2347 vcpu->regs[VCPU_REGS_R15] = regs->r15;
2348#endif
2349
2350 vcpu->rip = regs->rip;
cbdd1bea 2351 kvm_x86_ops->set_rflags(vcpu, regs->rflags);
6aa8b732 2352
cbdd1bea 2353 kvm_x86_ops->decache_regs(vcpu);
6aa8b732
AK		 2354
2355 vcpu_put(vcpu);
2356
2357 return 0;
2358}
2359
2360static void get_segment(struct kvm_vcpu *vcpu,
2361 struct kvm_segment *var, int seg)
2362{
cbdd1bea 2363 return kvm_x86_ops->get_segment(vcpu, var, seg);
6aa8b732
AK		 2364}
2365
bccf2150
AK		 2366static int kvm_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
2367 struct kvm_sregs *sregs)
6aa8b732 2368{
6aa8b732 2369 struct descriptor_table dt;
2a8067f1 2370 int pending_vec;
6aa8b732 2371
bccf2150 2372 vcpu_load(vcpu);
6aa8b732
AK		 2373
2374 get_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
2375 get_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
2376 get_segment(vcpu, &sregs->es, VCPU_SREG_ES);
2377 get_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
2378 get_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
2379 get_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
2380
2381 get_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
2382 get_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
2383
cbdd1bea 2384 kvm_x86_ops->get_idt(vcpu, &dt);
6aa8b732
AK		 2385 sregs->idt.limit = dt.limit;
2386 sregs->idt.base = dt.base;
cbdd1bea 2387 kvm_x86_ops->get_gdt(vcpu, &dt);
6aa8b732
AK		 2388 sregs->gdt.limit = dt.limit;
2389 sregs->gdt.base = dt.base;
2390
cbdd1bea 2391 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
6aa8b732
AK		 2392 sregs->cr0 = vcpu->cr0;
2393 sregs->cr2 = vcpu->cr2;
2394 sregs->cr3 = vcpu->cr3;
2395 sregs->cr4 = vcpu->cr4;
7017fc3d 2396 sregs->cr8 = get_cr8(vcpu);
6aa8b732 2397 sregs->efer = vcpu->shadow_efer;
7017fc3d 2398 sregs->apic_base = kvm_get_apic_base(vcpu);
6aa8b732 2399
2a8067f1 2400 if (irqchip_in_kernel(vcpu->kvm)) {
c52fb35a
HQ		 2401 memset(sregs->interrupt_bitmap, 0,
2402 sizeof sregs->interrupt_bitmap);
cbdd1bea 2403 pending_vec = kvm_x86_ops->get_irq(vcpu);
2a8067f1 2404 if (pending_vec >= 0)
d77c26fc
MD		 2405 set_bit(pending_vec,
2406 (unsigned long *)sregs->interrupt_bitmap);
2a8067f1 2407 } else
c52fb35a
HQ		 2408 memcpy(sregs->interrupt_bitmap, vcpu->irq_pending,
2409 sizeof sregs->interrupt_bitmap);
6aa8b732
AK		 2410
2411 vcpu_put(vcpu);
2412
2413 return 0;
2414}
2415
2416static void set_segment(struct kvm_vcpu *vcpu,
2417 struct kvm_segment *var, int seg)
2418{
cbdd1bea 2419 return kvm_x86_ops->set_segment(vcpu, var, seg);
6aa8b732
AK		 2420}
2421
bccf2150
AK		 2422static int kvm_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
2423 struct kvm_sregs *sregs)
6aa8b732 2424{
6aa8b732 2425 int mmu_reset_needed = 0;
2a8067f1 2426 int i, pending_vec, max_bits;
6aa8b732
AK		 2427 struct descriptor_table dt;
2428
bccf2150 2429 vcpu_load(vcpu);
6aa8b732 2430
6aa8b732
AK		 2431 dt.limit = sregs->idt.limit;
2432 dt.base = sregs->idt.base;
cbdd1bea 2433 kvm_x86_ops->set_idt(vcpu, &dt);
6aa8b732
AK		 2434 dt.limit = sregs->gdt.limit;
2435 dt.base = sregs->gdt.base;
cbdd1bea 2436 kvm_x86_ops->set_gdt(vcpu, &dt);
6aa8b732
AK		 2437
2438 vcpu->cr2 = sregs->cr2;
2439 mmu_reset_needed |= vcpu->cr3 != sregs->cr3;
2440 vcpu->cr3 = sregs->cr3;
2441
7017fc3d 2442 set_cr8(vcpu, sregs->cr8);
6aa8b732
AK		 2443
2444 mmu_reset_needed |= vcpu->shadow_efer != sregs->efer;
05b3e0c2 2445#ifdef CONFIG_X86_64
cbdd1bea 2446 kvm_x86_ops->set_efer(vcpu, sregs->efer);
6aa8b732 2447#endif
7017fc3d 2448 kvm_set_apic_base(vcpu, sregs->apic_base);
6aa8b732 2449
cbdd1bea 2450 kvm_x86_ops->decache_cr4_guest_bits(vcpu);
399badf3 2451
6aa8b732 2452 mmu_reset_needed |= vcpu->cr0 != sregs->cr0;
81f50e3b 2453 vcpu->cr0 = sregs->cr0;
cbdd1bea 2454 kvm_x86_ops->set_cr0(vcpu, sregs->cr0);
6aa8b732
AK		 2455
2456 mmu_reset_needed |= vcpu->cr4 != sregs->cr4;
cbdd1bea 2457 kvm_x86_ops->set_cr4(vcpu, sregs->cr4);
1b0973bd
AK		 2458 if (!is_long_mode(vcpu) && is_pae(vcpu))
2459 load_pdptrs(vcpu, vcpu->cr3);
6aa8b732
AK		 2460
2461 if (mmu_reset_needed)
2462 kvm_mmu_reset_context(vcpu);
2463
c52fb35a
HQ		 2464 if (!irqchip_in_kernel(vcpu->kvm)) {
2465 memcpy(vcpu->irq_pending, sregs->interrupt_bitmap,
2466 sizeof vcpu->irq_pending);
2467 vcpu->irq_summary = 0;
2468 for (i = 0; i < ARRAY_SIZE(vcpu->irq_pending); ++i)
2469 if (vcpu->irq_pending[i])
2470 __set_bit(i, &vcpu->irq_summary);
2a8067f1
ED		 2471 } else {
2472 max_bits = (sizeof sregs->interrupt_bitmap) << 3;
2473 pending_vec = find_first_bit(
2474 (const unsigned long *)sregs->interrupt_bitmap,
2475 max_bits);
2476 /* Only pending external irq is handled here */
2477 if (pending_vec < max_bits) {
cbdd1bea 2478 kvm_x86_ops->set_irq(vcpu, pending_vec);
d77c26fc
MD		 2479 pr_debug("Set back pending irq %d\n",
2480 pending_vec);
2a8067f1 2481 }
c52fb35a 2482 }
6aa8b732 2483
024aa1c0
AK		 2484 set_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
2485 set_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
2486 set_segment(vcpu, &sregs->es, VCPU_SREG_ES);
2487 set_segment(vcpu, &sregs->fs, VCPU_SREG_FS);
2488 set_segment(vcpu, &sregs->gs, VCPU_SREG_GS);
2489 set_segment(vcpu, &sregs->ss, VCPU_SREG_SS);
2490
2491 set_segment(vcpu, &sregs->tr, VCPU_SREG_TR);
2492 set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR);
2493
6aa8b732
AK		 2494 vcpu_put(vcpu);
2495
2496 return 0;
2497}
2498
1747fb71
RR		 2499void kvm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
2500{
2501 struct kvm_segment cs;
2502
2503 get_segment(vcpu, &cs, VCPU_SREG_CS);
2504 *db = cs.db;
2505 *l = cs.l;
2506}
2507EXPORT_SYMBOL_GPL(kvm_get_cs_db_l_bits);
2508
6aa8b732
AK		 2509/*
2510 * Translate a guest virtual address to a guest physical address.
2511 */
bccf2150
AK		 2512static int kvm_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
2513 struct kvm_translation *tr)
6aa8b732
AK		 2514{
2515 unsigned long vaddr = tr->linear_address;
6aa8b732
AK		 2516 gpa_t gpa;
2517
bccf2150 2518 vcpu_load(vcpu);
11ec2804 2519 mutex_lock(&vcpu->kvm->lock);
6aa8b732
AK		 2520 gpa = vcpu->mmu.gva_to_gpa(vcpu, vaddr);
2521 tr->physical_address = gpa;
2522 tr->valid = gpa != UNMAPPED_GVA;
2523 tr->writeable = 1;
2524 tr->usermode = 0;
11ec2804 2525 mutex_unlock(&vcpu->kvm->lock);
6aa8b732
AK		 2526 vcpu_put(vcpu);
2527
2528 return 0;
2529}
2530
bccf2150
AK		 2531static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu,
2532 struct kvm_interrupt *irq)
6aa8b732 2533{
6aa8b732
AK		 2534 if (irq->irq < 0 || irq->irq >= 256)
2535 return -EINVAL;
97222cc8
ED		 2536 if (irqchip_in_kernel(vcpu->kvm))
2537 return -ENXIO;
bccf2150 2538 vcpu_load(vcpu);
6aa8b732
AK		 2539
2540 set_bit(irq->irq, vcpu->irq_pending);
2541 set_bit(irq->irq / BITS_PER_LONG, &vcpu->irq_summary);
2542
2543 vcpu_put(vcpu);
2544
2545 return 0;
2546}
2547
bccf2150
AK		 2548static int kvm_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
2549 struct kvm_debug_guest *dbg)
6aa8b732 2550{
6aa8b732
AK		 2551 int r;
2552
bccf2150 2553 vcpu_load(vcpu);
6aa8b732 2554
cbdd1bea 2555 r = kvm_x86_ops->set_guest_debug(vcpu, dbg);
6aa8b732
AK		 2556
2557 vcpu_put(vcpu);
2558
2559 return r;
2560}
2561
9a2bb7f4
AK		 2562static struct page *kvm_vcpu_nopage(struct vm_area_struct *vma,
2563 unsigned long address,
2564 int *type)
2565{
2566 struct kvm_vcpu *vcpu = vma->vm_file->private_data;
2567 unsigned long pgoff;
2568 struct page *page;
2569
9a2bb7f4 2570 pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
039576c0
AK		 2571 if (pgoff == 0)
2572 page = virt_to_page(vcpu->run);
2573 else if (pgoff == KVM_PIO_PAGE_OFFSET)
2574 page = virt_to_page(vcpu->pio_data);
2575 else
9a2bb7f4 2576 return NOPAGE_SIGBUS;
9a2bb7f4 2577 get_page(page);
cd0d9137
NAQ		 2578 if (type != NULL)
2579 *type = VM_FAULT_MINOR;
2580
9a2bb7f4
AK		 2581 return page;
2582}
2583
2584static struct vm_operations_struct kvm_vcpu_vm_ops = {
2585 .nopage = kvm_vcpu_nopage,
2586};
2587
2588static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma)
2589{
2590 vma->vm_ops = &kvm_vcpu_vm_ops;
2591 return 0;
2592}
2593
bccf2150
AK		 2594static int kvm_vcpu_release(struct inode *inode, struct file *filp)
2595{
2596 struct kvm_vcpu *vcpu = filp->private_data;
2597
2598 fput(vcpu->kvm->filp);
2599 return 0;
2600}
2601
2602static struct file_operations kvm_vcpu_fops = {
2603 .release = kvm_vcpu_release,
2604 .unlocked_ioctl = kvm_vcpu_ioctl,
2605 .compat_ioctl = kvm_vcpu_ioctl,
9a2bb7f4 2606 .mmap = kvm_vcpu_mmap,
bccf2150
AK		 2607};
2608
2609/*
2610 * Allocates an inode for the vcpu.
2611 */
2612static int create_vcpu_fd(struct kvm_vcpu *vcpu)
2613{
2614 int fd, r;
2615 struct inode *inode;
2616 struct file *file;
2617
d6d28168
AK		 2618 r = anon_inode_getfd(&fd, &inode, &file,
2619 "kvm-vcpu", &kvm_vcpu_fops, vcpu);
2620 if (r)
2621 return r;
bccf2150 2622 atomic_inc(&vcpu->kvm->filp->f_count);
bccf2150 2623 return fd;
bccf2150
AK		 2624}
2625
c5ea7660
AK		 2626/*
2627 * Creates some virtual cpus. Good luck creating more than one.
2628 */
2629static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n)
2630{
2631 int r;
2632 struct kvm_vcpu *vcpu;
2633
c5ea7660 2634 if (!valid_vcpu(n))
fb3f0f51 2635 return -EINVAL;
c5ea7660 2636
cbdd1bea 2637 vcpu = kvm_x86_ops->vcpu_create(kvm, n);
fb3f0f51
RR		 2638 if (IS_ERR(vcpu))
2639 return PTR_ERR(vcpu);
c5ea7660 2640
15ad7146
AK		 2641 preempt_notifier_init(&vcpu->preempt_notifier, &kvm_preempt_ops);
2642
b114b080
RR		 2643 /* We do fxsave: this must be aligned. */
2644 BUG_ON((unsigned long)&vcpu->host_fx_image & 0xF);
2645
fb3f0f51 2646 vcpu_load(vcpu);
c5ea7660 2647 r = kvm_mmu_setup(vcpu);
c5ea7660 2648 vcpu_put(vcpu);
c5ea7660 2649 if (r < 0)
fb3f0f51
RR		 2650 goto free_vcpu;
2651
11ec2804 2652 mutex_lock(&kvm->lock);
fb3f0f51
RR		 2653 if (kvm->vcpus[n]) {
2654 r = -EEXIST;
11ec2804 2655 mutex_unlock(&kvm->lock);
fb3f0f51
RR		 2656 goto mmu_unload;
2657 }
2658 kvm->vcpus[n] = vcpu;
11ec2804 2659 mutex_unlock(&kvm->lock);
c5ea7660 2660
fb3f0f51 2661 /* Now it's all set up, let userspace reach it */
bccf2150
AK		 2662 r = create_vcpu_fd(vcpu);
2663 if (r < 0)
fb3f0f51
RR		 2664 goto unlink;
2665 return r;
39c3b86e 2666
fb3f0f51 2667unlink:
11ec2804 2668 mutex_lock(&kvm->lock);
fb3f0f51 2669 kvm->vcpus[n] = NULL;
11ec2804 2670 mutex_unlock(&kvm->lock);
a2fa3e9f 2671
fb3f0f51
RR		 2672mmu_unload:
2673 vcpu_load(vcpu);
2674 kvm_mmu_unload(vcpu);
2675 vcpu_put(vcpu);
c5ea7660 2676
fb3f0f51 2677free_vcpu:
cbdd1bea 2678 kvm_x86_ops->vcpu_free(vcpu);
c5ea7660
AK		 2679 return r;
2680}
2681
1961d276
AK		 2682static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset)
2683{
2684 if (sigset) {
2685 sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP));
2686 vcpu->sigset_active = 1;
2687 vcpu->sigset = *sigset;
2688 } else
2689 vcpu->sigset_active = 0;
2690 return 0;
2691}
2692
b8836737
AK		 2693/*
2694 * fxsave fpu state. Taken from x86_64/processor.h. To be killed when
2695 * we have asm/x86/processor.h
2696 */
2697struct fxsave {
2698 u16 cwd;
2699 u16 swd;
2700 u16 twd;
2701 u16 fop;
2702 u64 rip;
2703 u64 rdp;
2704 u32 mxcsr;
2705 u32 mxcsr_mask;
2706 u32 st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */
2707#ifdef CONFIG_X86_64
2708 u32 xmm_space[64]; /* 16*16 bytes for each XMM-reg = 256 bytes */
2709#else
2710 u32 xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */
2711#endif
2712};
2713
2714static int kvm_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
2715{
b114b080 2716 struct fxsave *fxsave = (struct fxsave *)&vcpu->guest_fx_image;
b8836737
AK		 2717
2718 vcpu_load(vcpu);
2719
2720 memcpy(fpu->fpr, fxsave->st_space, 128);
2721 fpu->fcw = fxsave->cwd;
2722 fpu->fsw = fxsave->swd;
2723 fpu->ftwx = fxsave->twd;
2724 fpu->last_opcode = fxsave->fop;
2725 fpu->last_ip = fxsave->rip;
2726 fpu->last_dp = fxsave->rdp;
2727 memcpy(fpu->xmm, fxsave->xmm_space, sizeof fxsave->xmm_space);
2728
2729 vcpu_put(vcpu);
2730
2731 return 0;
2732}
2733
2734static int kvm_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
2735{
b114b080 2736 struct fxsave *fxsave = (struct fxsave *)&vcpu->guest_fx_image;
b8836737
AK		 2737
2738 vcpu_load(vcpu);
2739
2740 memcpy(fxsave->st_space, fpu->fpr, 128);
2741 fxsave->cwd = fpu->fcw;
2742 fxsave->swd = fpu->fsw;
2743 fxsave->twd = fpu->ftwx;
2744 fxsave->fop = fpu->last_opcode;
2745 fxsave->rip = fpu->last_ip;
2746 fxsave->rdp = fpu->last_dp;
2747 memcpy(fxsave->xmm_space, fpu->xmm, sizeof fxsave->xmm_space);
2748
2749 vcpu_put(vcpu);
2750
2751 return 0;
2752}
2753
bccf2150
AK		 2754static long kvm_vcpu_ioctl(struct file *filp,
2755 unsigned int ioctl, unsigned long arg)
6aa8b732 2756{
bccf2150 2757 struct kvm_vcpu *vcpu = filp->private_data;
2f366987 2758 void __user *argp = (void __user *)arg;
313a3dc7 2759 int r;
6aa8b732
AK		 2760
2761 switch (ioctl) {
9a2bb7f4 2762 case KVM_RUN:
f0fe5108
AK		 2763 r = -EINVAL;
2764 if (arg)
2765 goto out;
9a2bb7f4 2766 r = kvm_vcpu_ioctl_run(vcpu, vcpu->run);
6aa8b732 2767 break;
6aa8b732
AK		 2768 case KVM_GET_REGS: {
2769 struct kvm_regs kvm_regs;
2770
bccf2150
AK		 2771 memset(&kvm_regs, 0, sizeof kvm_regs);
2772 r = kvm_vcpu_ioctl_get_regs(vcpu, &kvm_regs);
6aa8b732
AK		 2773 if (r)
2774 goto out;
2775 r = -EFAULT;
2f366987 2776 if (copy_to_user(argp, &kvm_regs, sizeof kvm_regs))
6aa8b732
AK		 2777 goto out;
2778 r = 0;
2779 break;
2780 }
2781 case KVM_SET_REGS: {
2782 struct kvm_regs kvm_regs;
2783
2784 r = -EFAULT;
2f366987 2785 if (copy_from_user(&kvm_regs, argp, sizeof kvm_regs))
6aa8b732 2786 goto out;
bccf2150 2787 r = kvm_vcpu_ioctl_set_regs(vcpu, &kvm_regs);
6aa8b732
AK		 2788 if (r)
2789 goto out;
2790 r = 0;
2791 break;
2792 }
2793 case KVM_GET_SREGS: {
2794 struct kvm_sregs kvm_sregs;
2795
bccf2150
AK		 2796 memset(&kvm_sregs, 0, sizeof kvm_sregs);
2797 r = kvm_vcpu_ioctl_get_sregs(vcpu, &kvm_sregs);
6aa8b732
AK		 2798 if (r)
2799 goto out;
2800 r = -EFAULT;
2f366987 2801 if (copy_to_user(argp, &kvm_sregs, sizeof kvm_sregs))
6aa8b732
AK		 2802 goto out;
2803 r = 0;
2804 break;
2805 }
2806 case KVM_SET_SREGS: {
2807 struct kvm_sregs kvm_sregs;
2808
2809 r = -EFAULT;
2f366987 2810 if (copy_from_user(&kvm_sregs, argp, sizeof kvm_sregs))
6aa8b732 2811 goto out;
bccf2150 2812 r = kvm_vcpu_ioctl_set_sregs(vcpu, &kvm_sregs);
6aa8b732
AK		 2813 if (r)
2814 goto out;
2815 r = 0;
2816 break;
2817 }
2818 case KVM_TRANSLATE: {
2819 struct kvm_translation tr;
2820
2821 r = -EFAULT;
2f366987 2822 if (copy_from_user(&tr, argp, sizeof tr))
6aa8b732 2823 goto out;
bccf2150 2824 r = kvm_vcpu_ioctl_translate(vcpu, &tr);
6aa8b732
AK		 2825 if (r)
2826 goto out;
2827 r = -EFAULT;
2f366987 2828 if (copy_to_user(argp, &tr, sizeof tr))
6aa8b732
AK		 2829 goto out;
2830 r = 0;
2831 break;
2832 }
2833 case KVM_INTERRUPT: {
2834 struct kvm_interrupt irq;
2835
2836 r = -EFAULT;
2f366987 2837 if (copy_from_user(&irq, argp, sizeof irq))
6aa8b732 2838 goto out;
bccf2150 2839 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
6aa8b732
AK		 2840 if (r)
2841 goto out;
2842 r = 0;
2843 break;
2844 }
2845 case KVM_DEBUG_GUEST: {
2846 struct kvm_debug_guest dbg;
2847
2848 r = -EFAULT;
2f366987 2849 if (copy_from_user(&dbg, argp, sizeof dbg))
6aa8b732 2850 goto out;
bccf2150 2851 r = kvm_vcpu_ioctl_debug_guest(vcpu, &dbg);
6aa8b732
AK		 2852 if (r)
2853 goto out;
2854 r = 0;
2855 break;
2856 }
1961d276
AK		 2857 case KVM_SET_SIGNAL_MASK: {
2858 struct kvm_signal_mask __user *sigmask_arg = argp;
2859 struct kvm_signal_mask kvm_sigmask;
2860 sigset_t sigset, *p;
2861
2862 p = NULL;
2863 if (argp) {
2864 r = -EFAULT;
2865 if (copy_from_user(&kvm_sigmask, argp,
2866 sizeof kvm_sigmask))
2867 goto out;
2868 r = -EINVAL;
2869 if (kvm_sigmask.len != sizeof sigset)
2870 goto out;
2871 r = -EFAULT;
2872 if (copy_from_user(&sigset, sigmask_arg->sigset,
2873 sizeof sigset))
2874 goto out;
2875 p = &sigset;
2876 }
2877 r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset);
2878 break;
2879 }
b8836737
AK		 2880 case KVM_GET_FPU: {
2881 struct kvm_fpu fpu;
2882
2883 memset(&fpu, 0, sizeof fpu);
2884 r = kvm_vcpu_ioctl_get_fpu(vcpu, &fpu);
2885 if (r)
2886 goto out;
2887 r = -EFAULT;
2888 if (copy_to_user(argp, &fpu, sizeof fpu))
2889 goto out;
2890 r = 0;
2891 break;
2892 }
2893 case KVM_SET_FPU: {
2894 struct kvm_fpu fpu;
2895
2896 r = -EFAULT;
2897 if (copy_from_user(&fpu, argp, sizeof fpu))
2898 goto out;
2899 r = kvm_vcpu_ioctl_set_fpu(vcpu, &fpu);
2900 if (r)
2901 goto out;
2902 r = 0;
2903 break;
2904 }
bccf2150 2905 default:
313a3dc7 2906 r = kvm_arch_vcpu_ioctl(filp, ioctl, arg);
bccf2150
AK		 2907 }
2908out:
2909 return r;
2910}
2911
2912static long kvm_vm_ioctl(struct file *filp,
2913 unsigned int ioctl, unsigned long arg)
2914{
2915 struct kvm *kvm = filp->private_data;
2916 void __user *argp = (void __user *)arg;
2917 int r = -EINVAL;
2918
2919 switch (ioctl) {
2920 case KVM_CREATE_VCPU:
2921 r = kvm_vm_ioctl_create_vcpu(kvm, arg);
2922 if (r < 0)
2923 goto out;
2924 break;
6aa8b732
AK		 2925 case KVM_SET_MEMORY_REGION: {
2926 struct kvm_memory_region kvm_mem;
6fc138d2 2927 struct kvm_userspace_memory_region kvm_userspace_mem;
6aa8b732
AK		 2928
2929 r = -EFAULT;
2f366987 2930 if (copy_from_user(&kvm_mem, argp, sizeof kvm_mem))
6aa8b732 2931 goto out;
6fc138d2
IE		 2932 kvm_userspace_mem.slot = kvm_mem.slot;
2933 kvm_userspace_mem.flags = kvm_mem.flags;
2934 kvm_userspace_mem.guest_phys_addr = kvm_mem.guest_phys_addr;
2935 kvm_userspace_mem.memory_size = kvm_mem.memory_size;
2936 r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 0);
2937 if (r)
2938 goto out;
2939 break;
2940 }
2941 case KVM_SET_USER_MEMORY_REGION: {
2942 struct kvm_userspace_memory_region kvm_userspace_mem;
2943
2944 r = -EFAULT;
2945 if (copy_from_user(&kvm_userspace_mem, argp,
2946 sizeof kvm_userspace_mem))
2947 goto out;
2948
2949 r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 1);
6aa8b732
AK		 2950 if (r)
2951 goto out;
2952 break;
2953 }
82ce2c96
IE		 2954 case KVM_SET_NR_MMU_PAGES:
2955 r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg);
2956 if (r)
2957 goto out;
2958 break;
2959 case KVM_GET_NR_MMU_PAGES:
2960 r = kvm_vm_ioctl_get_nr_mmu_pages(kvm);
2961 break;
6aa8b732
AK		 2962 case KVM_GET_DIRTY_LOG: {
2963 struct kvm_dirty_log log;
2964
2965 r = -EFAULT;
2f366987 2966 if (copy_from_user(&log, argp, sizeof log))
6aa8b732 2967 goto out;
2c6f5df9 2968 r = kvm_vm_ioctl_get_dirty_log(kvm, &log);
6aa8b732
AK		 2969 if (r)
2970 goto out;
2971 break;
2972 }
e8207547
AK		 2973 case KVM_SET_MEMORY_ALIAS: {
2974 struct kvm_memory_alias alias;
2975
2976 r = -EFAULT;
2977 if (copy_from_user(&alias, argp, sizeof alias))
2978 goto out;
2979 r = kvm_vm_ioctl_set_memory_alias(kvm, &alias);
2980 if (r)
2981 goto out;
2982 break;
2983 }
85f455f7
ED		 2984 case KVM_CREATE_IRQCHIP:
2985 r = -ENOMEM;
2986 kvm->vpic = kvm_create_pic(kvm);
1fd4f2a5
ED		 2987 if (kvm->vpic) {
2988 r = kvm_ioapic_init(kvm);
2989 if (r) {
2990 kfree(kvm->vpic);
2991 kvm->vpic = NULL;
2992 goto out;
2993 }
d77c26fc 2994 } else
85f455f7
ED		 2995 goto out;
2996 break;
2997 case KVM_IRQ_LINE: {
2998 struct kvm_irq_level irq_event;
2999
3000 r = -EFAULT;
3001 if (copy_from_user(&irq_event, argp, sizeof irq_event))
3002 goto out;
3003 if (irqchip_in_kernel(kvm)) {
9cf98828 3004 mutex_lock(&kvm->lock);
85f455f7
ED		 3005 if (irq_event.irq < 16)
3006 kvm_pic_set_irq(pic_irqchip(kvm),
3007 irq_event.irq,
3008 irq_event.level);
1fd4f2a5
ED		 3009 kvm_ioapic_set_irq(kvm->vioapic,
3010 irq_event.irq,
3011 irq_event.level);
9cf98828 3012 mutex_unlock(&kvm->lock);
85f455f7
ED		 3013 r = 0;
3014 }
3015 break;
3016 }
6ceb9d79
HQ		 3017 case KVM_GET_IRQCHIP: {
3018 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
3019 struct kvm_irqchip chip;
3020
3021 r = -EFAULT;
3022 if (copy_from_user(&chip, argp, sizeof chip))
3023 goto out;
3024 r = -ENXIO;
3025 if (!irqchip_in_kernel(kvm))
3026 goto out;
3027 r = kvm_vm_ioctl_get_irqchip(kvm, &chip);
3028 if (r)
3029 goto out;
3030 r = -EFAULT;
3031 if (copy_to_user(argp, &chip, sizeof chip))
3032 goto out;
3033 r = 0;
3034 break;
3035 }
3036 case KVM_SET_IRQCHIP: {
3037 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
3038 struct kvm_irqchip chip;
3039
3040 r = -EFAULT;
3041 if (copy_from_user(&chip, argp, sizeof chip))
3042 goto out;
3043 r = -ENXIO;
3044 if (!irqchip_in_kernel(kvm))
3045 goto out;
3046 r = kvm_vm_ioctl_set_irqchip(kvm, &chip);
3047 if (r)
3048 goto out;
3049 r = 0;
3050 break;
3051 }
f17abe9a
AK		 3052 default:
3053 ;
3054 }
3055out:
3056 return r;
3057}
3058
3059static struct page *kvm_vm_nopage(struct vm_area_struct *vma,
3060 unsigned long address,
3061 int *type)
3062{
3063 struct kvm *kvm = vma->vm_file->private_data;
3064 unsigned long pgoff;
f17abe9a
AK		 3065 struct page *page;
3066
f17abe9a 3067 pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
954bbbc2 3068 page = gfn_to_page(kvm, pgoff);
f17abe9a
AK		 3069 if (!page)
3070 return NOPAGE_SIGBUS;
3071 get_page(page);
cd0d9137
NAQ		 3072 if (type != NULL)
3073 *type = VM_FAULT_MINOR;
3074
f17abe9a
AK		 3075 return page;
3076}
3077
3078static struct vm_operations_struct kvm_vm_vm_ops = {
3079 .nopage = kvm_vm_nopage,
3080};
3081
3082static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma)
3083{
3084 vma->vm_ops = &kvm_vm_vm_ops;
3085 return 0;
3086}
3087
3088static struct file_operations kvm_vm_fops = {
3089 .release = kvm_vm_release,
3090 .unlocked_ioctl = kvm_vm_ioctl,
3091 .compat_ioctl = kvm_vm_ioctl,
3092 .mmap = kvm_vm_mmap,
3093};
3094
3095static int kvm_dev_ioctl_create_vm(void)
3096{
3097 int fd, r;
3098 struct inode *inode;
3099 struct file *file;
3100 struct kvm *kvm;
3101
f17abe9a 3102 kvm = kvm_create_vm();
d6d28168
AK		 3103 if (IS_ERR(kvm))
3104 return PTR_ERR(kvm);
3105 r = anon_inode_getfd(&fd, &inode, &file, "kvm-vm", &kvm_vm_fops, kvm);
3106 if (r) {
3107 kvm_destroy_vm(kvm);
3108 return r;
f17abe9a
AK		 3109 }
3110
bccf2150 3111 kvm->filp = file;
f17abe9a 3112
f17abe9a 3113 return fd;
f17abe9a
AK		 3114}
3115
3116static long kvm_dev_ioctl(struct file *filp,
3117 unsigned int ioctl, unsigned long arg)
3118{
3119 void __user *argp = (void __user *)arg;
07c45a36 3120 long r = -EINVAL;
f17abe9a
AK		 3121
3122 switch (ioctl) {
3123 case KVM_GET_API_VERSION:
f0fe5108
AK		 3124 r = -EINVAL;
3125 if (arg)
3126 goto out;
f17abe9a
AK		 3127 r = KVM_API_VERSION;
3128 break;
3129 case KVM_CREATE_VM:
f0fe5108
AK		 3130 r = -EINVAL;
3131 if (arg)
3132 goto out;
f17abe9a
AK		 3133 r = kvm_dev_ioctl_create_vm();
3134 break;
85f455f7
ED		 3135 case KVM_CHECK_EXTENSION: {
3136 int ext = (long)argp;
3137
3138 switch (ext) {
3139 case KVM_CAP_IRQCHIP:
b6958ce4 3140 case KVM_CAP_HLT:
82ce2c96 3141 case KVM_CAP_MMU_SHADOW_CACHE_CONTROL:
6fc138d2 3142 case KVM_CAP_USER_MEMORY:
85f455f7
ED		 3143 r = 1;
3144 break;
3145 default:
3146 r = 0;
3147 break;
3148 }
5d308f45 3149 break;
85f455f7 3150 }
07c45a36
AK		 3151 case KVM_GET_VCPU_MMAP_SIZE:
3152 r = -EINVAL;
3153 if (arg)
3154 goto out;
039576c0 3155 r = 2 * PAGE_SIZE;
07c45a36 3156 break;
6aa8b732 3157 default:
043405e1 3158 return kvm_arch_dev_ioctl(filp, ioctl, arg);
6aa8b732
AK		 3159 }
3160out:
3161 return r;
3162}
3163
6aa8b732 3164static struct file_operations kvm_chardev_ops = {
6aa8b732
AK		 3165 .unlocked_ioctl = kvm_dev_ioctl,
3166 .compat_ioctl = kvm_dev_ioctl,
6aa8b732
AK		 3167};
3168
3169static struct miscdevice kvm_dev = {
bbe4432e 3170 KVM_MINOR,
6aa8b732
AK		 3171 "kvm",
3172 &kvm_chardev_ops,
3173};
3174
774c47f1
AK		 3175/*
3176 * Make sure that a cpu that is being hot-unplugged does not have any vcpus
3177 * cached on it.
3178 */
3179static void decache_vcpus_on_cpu(int cpu)
3180{
3181 struct kvm *vm;
3182 struct kvm_vcpu *vcpu;
3183 int i;
3184
3185 spin_lock(&kvm_lock);
11ec2804 3186 list_for_each_entry(vm, &vm_list, vm_list)
774c47f1 3187 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
fb3f0f51
RR		 3188 vcpu = vm->vcpus[i];
3189 if (!vcpu)
3190 continue;
774c47f1
AK		 3191 /*
3192 * If the vcpu is locked, then it is running on some
3193 * other cpu and therefore it is not cached on the
3194 * cpu in question.
3195 *
3196 * If it's not locked, check the last cpu it executed
3197 * on.
3198 */
3199 if (mutex_trylock(&vcpu->mutex)) {
3200 if (vcpu->cpu == cpu) {
cbdd1bea 3201 kvm_x86_ops->vcpu_decache(vcpu);
774c47f1
AK		 3202 vcpu->cpu = -1;
3203 }
3204 mutex_unlock(&vcpu->mutex);
3205 }
3206 }
3207 spin_unlock(&kvm_lock);
3208}
3209
1b6c0168
AK		 3210static void hardware_enable(void *junk)
3211{
3212 int cpu = raw_smp_processor_id();
3213
3214 if (cpu_isset(cpu, cpus_hardware_enabled))
3215 return;
3216 cpu_set(cpu, cpus_hardware_enabled);
cbdd1bea 3217 kvm_x86_ops->hardware_enable(NULL);
1b6c0168
AK		 3218}
3219
3220static void hardware_disable(void *junk)
3221{
3222 int cpu = raw_smp_processor_id();
3223
3224 if (!cpu_isset(cpu, cpus_hardware_enabled))
3225 return;
3226 cpu_clear(cpu, cpus_hardware_enabled);
3227 decache_vcpus_on_cpu(cpu);
cbdd1bea 3228 kvm_x86_ops->hardware_disable(NULL);
1b6c0168
AK		 3229}
3230
774c47f1
AK		 3231static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val,
3232 void *v)
3233{
3234 int cpu = (long)v;
3235
3236 switch (val) {
cec9ad27
AK		 3237 case CPU_DYING:
3238 case CPU_DYING_FROZEN:
6ec8a856
AK		 3239 printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",
3240 cpu);
3241 hardware_disable(NULL);
3242 break;
774c47f1 3243 case CPU_UP_CANCELED:
8bb78442 3244 case CPU_UP_CANCELED_FROZEN:
43934a38
JK		 3245 printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",
3246 cpu);
1b6c0168 3247 smp_call_function_single(cpu, hardware_disable, NULL, 0, 1);
774c47f1 3248 break;
43934a38 3249 case CPU_ONLINE:
8bb78442 3250 case CPU_ONLINE_FROZEN:
43934a38
JK		 3251 printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n",
3252 cpu);
1b6c0168 3253 smp_call_function_single(cpu, hardware_enable, NULL, 0, 1);
774c47f1
AK		 3254 break;
3255 }
3256 return NOTIFY_OK;
3257}
3258
9a2b85c6 3259static int kvm_reboot(struct notifier_block *notifier, unsigned long val,
d77c26fc 3260 void *v)
9a2b85c6
RR		 3261{
3262 if (val == SYS_RESTART) {
3263 /*
3264 * Some (well, at least mine) BIOSes hang on reboot if
3265 * in vmx root mode.
3266 */
3267 printk(KERN_INFO "kvm: exiting hardware virtualization\n");
3268 on_each_cpu(hardware_disable, NULL, 0, 1);
3269 }
3270 return NOTIFY_OK;
3271}
3272
3273static struct notifier_block kvm_reboot_notifier = {
3274 .notifier_call = kvm_reboot,
3275 .priority = 0,
3276};
3277
2eeb2e94
GH		 3278void kvm_io_bus_init(struct kvm_io_bus *bus)
3279{
3280 memset(bus, 0, sizeof(*bus));
3281}
3282
3283void kvm_io_bus_destroy(struct kvm_io_bus *bus)
3284{
3285 int i;
3286
3287 for (i = 0; i < bus->dev_count; i++) {
3288 struct kvm_io_device *pos = bus->devs[i];
3289
3290 kvm_iodevice_destructor(pos);
3291 }
3292}
3293
3294struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr)
3295{
3296 int i;
3297
3298 for (i = 0; i < bus->dev_count; i++) {
3299 struct kvm_io_device *pos = bus->devs[i];
3300
3301 if (pos->in_range(pos, addr))
3302 return pos;
3303 }
3304
3305 return NULL;
3306}
3307
3308void kvm_io_bus_register_dev(struct kvm_io_bus *bus, struct kvm_io_device *dev)
3309{
3310 BUG_ON(bus->dev_count > (NR_IOBUS_DEVS-1));
3311
3312 bus->devs[bus->dev_count++] = dev;
3313}
3314
774c47f1
AK		 3315static struct notifier_block kvm_cpu_notifier = {
3316 .notifier_call = kvm_cpu_hotplug,
3317 .priority = 20, /* must be > scheduler priority */
3318};
3319
1165f5fe
AK		 3320static u64 stat_get(void *_offset)
3321{
3322 unsigned offset = (long)_offset;
3323 u64 total = 0;
3324 struct kvm *kvm;
3325 struct kvm_vcpu *vcpu;
3326 int i;
3327
3328 spin_lock(&kvm_lock);
3329 list_for_each_entry(kvm, &vm_list, vm_list)
3330 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
fb3f0f51
RR		 3331 vcpu = kvm->vcpus[i];
3332 if (vcpu)
3333 total += *(u32 *)((void *)vcpu + offset);
1165f5fe
AK		 3334 }
3335 spin_unlock(&kvm_lock);
3336 return total;
3337}
3338
3dea7ca7 3339DEFINE_SIMPLE_ATTRIBUTE(stat_fops, stat_get, NULL, "%llu\n");
1165f5fe 3340
6aa8b732
AK		 3341static __init void kvm_init_debug(void)
3342{
3343 struct kvm_stats_debugfs_item *p;
3344
8b6d44c7 3345 debugfs_dir = debugfs_create_dir("kvm", NULL);
6aa8b732 3346 for (p = debugfs_entries; p->name; ++p)
1165f5fe
AK		 3347 p->dentry = debugfs_create_file(p->name, 0444, debugfs_dir,
3348 (void *)(long)p->offset,
3349 &stat_fops);
6aa8b732
AK		 3350}
3351
3352static void kvm_exit_debug(void)
3353{
3354 struct kvm_stats_debugfs_item *p;
3355
3356 for (p = debugfs_entries; p->name; ++p)
3357 debugfs_remove(p->dentry);
3358 debugfs_remove(debugfs_dir);
3359}
3360
59ae6c6b
AK		 3361static int kvm_suspend(struct sys_device *dev, pm_message_t state)
3362{
4267c41a 3363 hardware_disable(NULL);
59ae6c6b
AK		 3364 return 0;
3365}
3366
3367static int kvm_resume(struct sys_device *dev)
3368{
4267c41a 3369 hardware_enable(NULL);
59ae6c6b
AK		 3370 return 0;
3371}
3372
3373static struct sysdev_class kvm_sysdev_class = {
af5ca3f4 3374 .name = "kvm",
59ae6c6b
AK		 3375 .suspend = kvm_suspend,
3376 .resume = kvm_resume,
3377};
3378
3379static struct sys_device kvm_sysdev = {
3380 .id = 0,
3381 .cls = &kvm_sysdev_class,
3382};
3383
6aa8b732
AK		 3384hpa_t bad_page_address;
3385
15ad7146
AK		 3386static inline
3387struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn)
3388{
3389 return container_of(pn, struct kvm_vcpu, preempt_notifier);
3390}
3391
3392static void kvm_sched_in(struct preempt_notifier *pn, int cpu)
3393{
3394 struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn);
3395
cbdd1bea 3396 kvm_x86_ops->vcpu_load(vcpu, cpu);
15ad7146
AK		 3397}
3398
3399static void kvm_sched_out(struct preempt_notifier *pn,
3400 struct task_struct *next)
3401{
3402 struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn);
3403
cbdd1bea 3404 kvm_x86_ops->vcpu_put(vcpu);
15ad7146
AK		 3405}
3406
cbdd1bea 3407int kvm_init_x86(struct kvm_x86_ops *ops, unsigned int vcpu_size,
c16f862d 3408 struct module *module)
6aa8b732
AK		 3409{
3410 int r;
002c7f7c 3411 int cpu;
6aa8b732 3412
cbdd1bea 3413 if (kvm_x86_ops) {
09db28b8
YI		 3414 printk(KERN_ERR "kvm: already loaded the other module\n");
3415 return -EEXIST;
3416 }
3417
e097f35c 3418 if (!ops->cpu_has_kvm_support()) {
6aa8b732
AK		 3419 printk(KERN_ERR "kvm: no hardware support\n");
3420 return -EOPNOTSUPP;
3421 }
e097f35c 3422 if (ops->disabled_by_bios()) {
6aa8b732
AK		 3423 printk(KERN_ERR "kvm: disabled by bios\n");
3424 return -EOPNOTSUPP;
3425 }
3426
cbdd1bea 3427 kvm_x86_ops = ops;
e097f35c 3428
cbdd1bea 3429 r = kvm_x86_ops->hardware_setup();
6aa8b732 3430 if (r < 0)
ca45aaae 3431 goto out;
6aa8b732 3432
002c7f7c
YS		 3433 for_each_online_cpu(cpu) {
3434 smp_call_function_single(cpu,
cbdd1bea 3435 kvm_x86_ops->check_processor_compatibility,
002c7f7c
YS		 3436 &r, 0, 1);
3437 if (r < 0)
3438 goto out_free_0;
3439 }
3440
1b6c0168 3441 on_each_cpu(hardware_enable, NULL, 0, 1);
774c47f1
AK		 3442 r = register_cpu_notifier(&kvm_cpu_notifier);
3443 if (r)
3444 goto out_free_1;
6aa8b732
AK		 3445 register_reboot_notifier(&kvm_reboot_notifier);
3446
59ae6c6b
AK		 3447 r = sysdev_class_register(&kvm_sysdev_class);
3448 if (r)
3449 goto out_free_2;
3450
3451 r = sysdev_register(&kvm_sysdev);
3452 if (r)
3453 goto out_free_3;
3454
c16f862d
RR		 3455 /* A kmem cache lets us meet the alignment requirements of fx_save. */
3456 kvm_vcpu_cache = kmem_cache_create("kvm_vcpu", vcpu_size,
3457 __alignof__(struct kvm_vcpu), 0, 0);
3458 if (!kvm_vcpu_cache) {
3459 r = -ENOMEM;
3460 goto out_free_4;
3461 }
3462
6aa8b732
AK		 3463 kvm_chardev_ops.owner = module;
3464
3465 r = misc_register(&kvm_dev);
3466 if (r) {
d77c26fc 3467 printk(KERN_ERR "kvm: misc device register failed\n");
6aa8b732
AK		 3468 goto out_free;
3469 }
3470
15ad7146
AK		 3471 kvm_preempt_ops.sched_in = kvm_sched_in;
3472 kvm_preempt_ops.sched_out = kvm_sched_out;
3473
c7addb90
AK		 3474 kvm_mmu_set_nonpresent_ptes(0ull, 0ull);
3475
3476 return 0;
6aa8b732
AK		 3477
3478out_free:
c16f862d
RR		 3479 kmem_cache_destroy(kvm_vcpu_cache);
3480out_free_4:
59ae6c6b
AK		 3481 sysdev_unregister(&kvm_sysdev);
3482out_free_3:
3483 sysdev_class_unregister(&kvm_sysdev_class);
3484out_free_2:
6aa8b732 3485 unregister_reboot_notifier(&kvm_reboot_notifier);
774c47f1
AK		 3486 unregister_cpu_notifier(&kvm_cpu_notifier);
3487out_free_1:
1b6c0168 3488 on_each_cpu(hardware_disable, NULL, 0, 1);
002c7f7c 3489out_free_0:
cbdd1bea 3490 kvm_x86_ops->hardware_unsetup();
ca45aaae 3491out:
cbdd1bea 3492 kvm_x86_ops = NULL;
6aa8b732
AK		 3493 return r;
3494}
d77c26fc 3495EXPORT_SYMBOL_GPL(kvm_init_x86);
6aa8b732 3496
cbdd1bea 3497void kvm_exit_x86(void)
6aa8b732
AK		 3498{
3499 misc_deregister(&kvm_dev);
c16f862d 3500 kmem_cache_destroy(kvm_vcpu_cache);
59ae6c6b
AK		 3501 sysdev_unregister(&kvm_sysdev);
3502 sysdev_class_unregister(&kvm_sysdev_class);
6aa8b732 3503 unregister_reboot_notifier(&kvm_reboot_notifier);
59ae6c6b 3504 unregister_cpu_notifier(&kvm_cpu_notifier);
1b6c0168 3505 on_each_cpu(hardware_disable, NULL, 0, 1);
cbdd1bea
CE		 3506 kvm_x86_ops->hardware_unsetup();
3507 kvm_x86_ops = NULL;
6aa8b732 3508}
d77c26fc 3509EXPORT_SYMBOL_GPL(kvm_exit_x86);
6aa8b732
AK		 3510
3511static __init int kvm_init(void)
3512{
3513 static struct page *bad_page;
37e29d90
AK		 3514 int r;
3515
b5a33a75
AK		 3516 r = kvm_mmu_module_init();
3517 if (r)
3518 goto out4;
3519
6aa8b732
AK		 3520 kvm_init_debug();
3521
043405e1 3522 kvm_arch_init();
bf591b24 3523
d77c26fc
MD		 3524 bad_page = alloc_page(GFP_KERNEL);
3525
3526 if (bad_page == NULL) {
6aa8b732
AK		 3527 r = -ENOMEM;
3528 goto out;
3529 }
3530
3531 bad_page_address = page_to_pfn(bad_page) << PAGE_SHIFT;
3532 memset(__va(bad_page_address), 0, PAGE_SIZE);
3533
58e690e6 3534 return 0;
6aa8b732
AK		 3535
3536out:
3537 kvm_exit_debug();
b5a33a75
AK		 3538 kvm_mmu_module_exit();
3539out4:
6aa8b732
AK		 3540 return r;
3541}
3542
3543static __exit void kvm_exit(void)
3544{
3545 kvm_exit_debug();
3546 __free_page(pfn_to_page(bad_page_address >> PAGE_SHIFT));
b5a33a75 3547 kvm_mmu_module_exit();
6aa8b732
AK		 3548}
3549
3550module_init(kvm_init)
3551module_exit(kvm_exit)
Linux kernel - Deliverables
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