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