blob: aec6b67cfebb4e97ff3e0debab928df64d7f3682 [file] [log] [blame]
Avi Kivity6aa8b732006-12-10 02:21:36 -08001/*
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"
Carsten Otte043405e2007-10-10 17:16:19 +020019#include "x86.h"
Eddie Dong85f455f2007-07-06 12:20:49 +030020#include "irq.h"
Avi Kivity6aa8b732006-12-10 02:21:36 -080021
22#include <linux/kvm.h>
23#include <linux/module.h>
24#include <linux/errno.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080025#include <linux/percpu.h>
26#include <linux/gfp.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080027#include <linux/mm.h>
28#include <linux/miscdevice.h>
29#include <linux/vmalloc.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080030#include <linux/reboot.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080031#include <linux/debugfs.h>
32#include <linux/highmem.h>
33#include <linux/file.h>
Avi Kivity59ae6c62007-02-12 00:54:48 -080034#include <linux/sysdev.h>
Avi Kivity774c47f2007-02-12 00:54:47 -080035#include <linux/cpu.h>
Alexey Dobriyane8edc6e2007-05-21 01:22:52 +040036#include <linux/sched.h>
Avi Kivityd9e368d2007-06-07 19:18:30 +030037#include <linux/cpumask.h>
38#include <linux/smp.h>
Avi Kivityd6d28162007-06-28 08:38:16 -040039#include <linux/anon_inodes.h>
Avi Kivity04d2cc72007-09-10 18:10:54 +030040#include <linux/profile.h>
Anthony Liguori7aa81cc2007-09-17 14:57:50 -050041#include <linux/kvm_para.h>
Izik Eidus6fc138d2007-10-09 19:20:39 +020042#include <linux/pagemap.h>
Anthony Liguori8d4e1282007-10-18 09:59:34 -050043#include <linux/mman.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080044
Avi Kivitye4956062007-06-28 14:15:57 -040045#include <asm/processor.h>
Avi Kivitye4956062007-06-28 14:15:57 -040046#include <asm/io.h>
47#include <asm/uaccess.h>
48#include <asm/desc.h>
Izik Eidus3e021bf2007-11-19 11:16:57 +020049#include <asm/pgtable.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080050
51MODULE_AUTHOR("Qumranet");
52MODULE_LICENSE("GPL");
53
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +080054DEFINE_SPINLOCK(kvm_lock);
55LIST_HEAD(vm_list);
Avi Kivity133de902007-02-12 00:54:44 -080056
Avi Kivity1b6c0162007-05-24 13:03:52 +030057static cpumask_t cpus_hardware_enabled;
58
Rusty Russellc16f8622007-07-30 21:12:19 +100059struct kmem_cache *kvm_vcpu_cache;
60EXPORT_SYMBOL_GPL(kvm_vcpu_cache);
Avi Kivity1165f5f2007-04-19 17:27:43 +030061
Avi Kivity15ad7142007-07-11 18:17:21 +030062static __read_mostly struct preempt_ops kvm_preempt_ops;
63
Avi Kivity6aa8b732006-12-10 02:21:36 -080064static struct dentry *debugfs_dir;
65
Avi Kivitybccf2152007-02-21 18:04:26 +020066static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl,
67 unsigned long arg);
68
James Morris5aacf0c2006-12-22 01:04:55 -080069static inline int valid_vcpu(int n)
70{
71 return likely(n >= 0 && n < KVM_MAX_VCPUS);
72}
73
Avi Kivity6aa8b732006-12-10 02:21:36 -080074/*
75 * Switches to specified vcpu, until a matching vcpu_put()
76 */
Carsten Otte313a3dc2007-10-11 19:16:52 +020077void vcpu_load(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -080078{
Avi Kivity15ad7142007-07-11 18:17:21 +030079 int cpu;
80
Avi Kivitybccf2152007-02-21 18:04:26 +020081 mutex_lock(&vcpu->mutex);
Avi Kivity15ad7142007-07-11 18:17:21 +030082 cpu = get_cpu();
83 preempt_notifier_register(&vcpu->preempt_notifier);
Carsten Otte313a3dc2007-10-11 19:16:52 +020084 kvm_arch_vcpu_load(vcpu, cpu);
Avi Kivity15ad7142007-07-11 18:17:21 +030085 put_cpu();
Avi Kivitybccf2152007-02-21 18:04:26 +020086}
87
Carsten Otte313a3dc2007-10-11 19:16:52 +020088void vcpu_put(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -080089{
Avi Kivity15ad7142007-07-11 18:17:21 +030090 preempt_disable();
Carsten Otte313a3dc2007-10-11 19:16:52 +020091 kvm_arch_vcpu_put(vcpu);
Avi Kivity15ad7142007-07-11 18:17:21 +030092 preempt_notifier_unregister(&vcpu->preempt_notifier);
93 preempt_enable();
Avi Kivity6aa8b732006-12-10 02:21:36 -080094 mutex_unlock(&vcpu->mutex);
95}
96
Avi Kivityd9e368d2007-06-07 19:18:30 +030097static void ack_flush(void *_completed)
98{
Avi Kivityd9e368d2007-06-07 19:18:30 +030099}
100
101void kvm_flush_remote_tlbs(struct kvm *kvm)
102{
Laurent Vivier49d3bd72007-10-22 16:33:07 +0200103 int i, cpu;
Avi Kivityd9e368d2007-06-07 19:18:30 +0300104 cpumask_t cpus;
105 struct kvm_vcpu *vcpu;
Avi Kivityd9e368d2007-06-07 19:18:30 +0300106
Avi Kivityd9e368d2007-06-07 19:18:30 +0300107 cpus_clear(cpus);
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000108 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
109 vcpu = kvm->vcpus[i];
110 if (!vcpu)
111 continue;
Avi Kivity3176bc32007-10-16 17:22:08 +0200112 if (test_and_set_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
Avi Kivityd9e368d2007-06-07 19:18:30 +0300113 continue;
114 cpu = vcpu->cpu;
115 if (cpu != -1 && cpu != raw_smp_processor_id())
Laurent Vivier49d3bd72007-10-22 16:33:07 +0200116 cpu_set(cpu, cpus);
Avi Kivityd9e368d2007-06-07 19:18:30 +0300117 }
Avi Kivity0f74a242007-11-20 23:01:14 +0200118 if (cpus_empty(cpus))
119 return;
120 ++kvm->stat.remote_tlb_flush;
Laurent Vivier49d3bd72007-10-22 16:33:07 +0200121 smp_call_function_mask(cpus, ack_flush, NULL, 1);
Avi Kivityd9e368d2007-06-07 19:18:30 +0300122}
123
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000124int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id)
125{
126 struct page *page;
127 int r;
128
129 mutex_init(&vcpu->mutex);
130 vcpu->cpu = -1;
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000131 vcpu->kvm = kvm;
132 vcpu->vcpu_id = id;
Eddie Dongb6958ce2007-07-18 12:15:21 +0300133 init_waitqueue_head(&vcpu->wq);
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000134
135 page = alloc_page(GFP_KERNEL | __GFP_ZERO);
136 if (!page) {
137 r = -ENOMEM;
138 goto fail;
139 }
140 vcpu->run = page_address(page);
141
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +0800142 r = kvm_arch_vcpu_init(vcpu);
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000143 if (r < 0)
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +0800144 goto fail_free_run;
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000145 return 0;
146
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000147fail_free_run:
148 free_page((unsigned long)vcpu->run);
149fail:
Rusty Russell76fafa52007-10-08 10:50:48 +1000150 return r;
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000151}
152EXPORT_SYMBOL_GPL(kvm_vcpu_init);
153
154void kvm_vcpu_uninit(struct kvm_vcpu *vcpu)
155{
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +0800156 kvm_arch_vcpu_uninit(vcpu);
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000157 free_page((unsigned long)vcpu->run);
158}
159EXPORT_SYMBOL_GPL(kvm_vcpu_uninit);
160
Avi Kivityf17abe92007-02-21 19:28:04 +0200161static struct kvm *kvm_create_vm(void)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800162{
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +0800163 struct kvm *kvm = kvm_arch_create_vm();
Avi Kivity6aa8b732006-12-10 02:21:36 -0800164
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +0800165 if (IS_ERR(kvm))
166 goto out;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800167
Eddie Dong74906342007-06-19 18:05:03 +0300168 kvm_io_bus_init(&kvm->pio_bus);
Shaohua Li11ec2802007-07-23 14:51:37 +0800169 mutex_init(&kvm->lock);
Gregory Haskins2eeb2e92007-05-31 14:08:53 -0400170 kvm_io_bus_init(&kvm->mmio_bus);
Rusty Russell5e58cfe2007-07-23 17:08:21 +1000171 spin_lock(&kvm_lock);
172 list_add(&kvm->vm_list, &vm_list);
173 spin_unlock(&kvm_lock);
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +0800174out:
Avi Kivityf17abe92007-02-21 19:28:04 +0200175 return kvm;
176}
177
Avi Kivity6aa8b732006-12-10 02:21:36 -0800178/*
179 * Free any memory in @free but not in @dont.
180 */
181static void kvm_free_physmem_slot(struct kvm_memory_slot *free,
182 struct kvm_memory_slot *dont)
183{
Izik Eidus290fc382007-09-27 14:11:22 +0200184 if (!dont || free->rmap != dont->rmap)
185 vfree(free->rmap);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800186
187 if (!dont || free->dirty_bitmap != dont->dirty_bitmap)
188 vfree(free->dirty_bitmap);
189
Avi Kivity6aa8b732006-12-10 02:21:36 -0800190 free->npages = 0;
Al Viro8b6d44c2007-02-09 16:38:40 +0000191 free->dirty_bitmap = NULL;
Anthony Liguori8d4e1282007-10-18 09:59:34 -0500192 free->rmap = NULL;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800193}
194
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +0800195void kvm_free_physmem(struct kvm *kvm)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800196{
197 int i;
198
199 for (i = 0; i < kvm->nmemslots; ++i)
Al Viro8b6d44c2007-02-09 16:38:40 +0000200 kvm_free_physmem_slot(&kvm->memslots[i], NULL);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800201}
202
Avi Kivityf17abe92007-02-21 19:28:04 +0200203static void kvm_destroy_vm(struct kvm *kvm)
204{
Avi Kivity133de902007-02-12 00:54:44 -0800205 spin_lock(&kvm_lock);
206 list_del(&kvm->vm_list);
207 spin_unlock(&kvm_lock);
Eddie Dong74906342007-06-19 18:05:03 +0300208 kvm_io_bus_destroy(&kvm->pio_bus);
Gregory Haskins2eeb2e92007-05-31 14:08:53 -0400209 kvm_io_bus_destroy(&kvm->mmio_bus);
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +0800210 kvm_arch_destroy_vm(kvm);
Avi Kivityf17abe92007-02-21 19:28:04 +0200211}
212
213static int kvm_vm_release(struct inode *inode, struct file *filp)
214{
215 struct kvm *kvm = filp->private_data;
216
217 kvm_destroy_vm(kvm);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800218 return 0;
219}
220
Avi Kivity6aa8b732006-12-10 02:21:36 -0800221/*
Avi Kivity6aa8b732006-12-10 02:21:36 -0800222 * Allocate some memory and give it an address in the guest physical address
223 * space.
224 *
225 * Discontiguous memory is allowed, mostly for framebuffers.
Sheng Yangf78e0e22007-10-29 09:40:42 +0800226 *
227 * Must be called holding kvm->lock.
Avi Kivity6aa8b732006-12-10 02:21:36 -0800228 */
Sheng Yangf78e0e22007-10-29 09:40:42 +0800229int __kvm_set_memory_region(struct kvm *kvm,
230 struct kvm_userspace_memory_region *mem,
231 int user_alloc)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800232{
233 int r;
234 gfn_t base_gfn;
235 unsigned long npages;
236 unsigned long i;
237 struct kvm_memory_slot *memslot;
238 struct kvm_memory_slot old, new;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800239
240 r = -EINVAL;
241 /* General sanity checks */
242 if (mem->memory_size & (PAGE_SIZE - 1))
243 goto out;
244 if (mem->guest_phys_addr & (PAGE_SIZE - 1))
245 goto out;
Izik Eiduse0d62c72007-10-24 23:57:46 +0200246 if (mem->slot >= KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800247 goto out;
248 if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr)
249 goto out;
250
251 memslot = &kvm->memslots[mem->slot];
252 base_gfn = mem->guest_phys_addr >> PAGE_SHIFT;
253 npages = mem->memory_size >> PAGE_SHIFT;
254
255 if (!npages)
256 mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES;
257
Avi Kivity6aa8b732006-12-10 02:21:36 -0800258 new = old = *memslot;
259
260 new.base_gfn = base_gfn;
261 new.npages = npages;
262 new.flags = mem->flags;
263
264 /* Disallow changing a memory slot's size. */
265 r = -EINVAL;
266 if (npages && old.npages && npages != old.npages)
Sheng Yangf78e0e22007-10-29 09:40:42 +0800267 goto out_free;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800268
269 /* Check for overlaps */
270 r = -EEXIST;
271 for (i = 0; i < KVM_MEMORY_SLOTS; ++i) {
272 struct kvm_memory_slot *s = &kvm->memslots[i];
273
274 if (s == memslot)
275 continue;
276 if (!((base_gfn + npages <= s->base_gfn) ||
277 (base_gfn >= s->base_gfn + s->npages)))
Sheng Yangf78e0e22007-10-29 09:40:42 +0800278 goto out_free;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800279 }
Avi Kivity6aa8b732006-12-10 02:21:36 -0800280
Avi Kivity6aa8b732006-12-10 02:21:36 -0800281 /* Free page dirty bitmap if unneeded */
282 if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES))
Al Viro8b6d44c2007-02-09 16:38:40 +0000283 new.dirty_bitmap = NULL;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800284
285 r = -ENOMEM;
286
287 /* Allocate if a slot is being created */
Anthony Liguori8d4e1282007-10-18 09:59:34 -0500288 if (npages && !new.rmap) {
Mike Dayd77c26f2007-10-08 09:02:08 -0400289 new.rmap = vmalloc(npages * sizeof(struct page *));
Izik Eidus290fc382007-09-27 14:11:22 +0200290
291 if (!new.rmap)
Sheng Yangf78e0e22007-10-29 09:40:42 +0800292 goto out_free;
Izik Eidus290fc382007-09-27 14:11:22 +0200293
Izik Eidus290fc382007-09-27 14:11:22 +0200294 memset(new.rmap, 0, npages * sizeof(*new.rmap));
Anthony Liguori8d4e1282007-10-18 09:59:34 -0500295
Izik Eidus80b14b52007-10-25 11:54:04 +0200296 new.user_alloc = user_alloc;
Zhang Xiantao0de10342007-11-20 16:25:04 +0800297 new.userspace_addr = mem->userspace_addr;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800298 }
299
300 /* Allocate page dirty bitmap if needed */
301 if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) {
302 unsigned dirty_bytes = ALIGN(npages, BITS_PER_LONG) / 8;
303
304 new.dirty_bitmap = vmalloc(dirty_bytes);
305 if (!new.dirty_bitmap)
Sheng Yangf78e0e22007-10-29 09:40:42 +0800306 goto out_free;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800307 memset(new.dirty_bitmap, 0, dirty_bytes);
308 }
309
Avi Kivity6aa8b732006-12-10 02:21:36 -0800310 if (mem->slot >= kvm->nmemslots)
311 kvm->nmemslots = mem->slot + 1;
312
313 *memslot = new;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800314
Zhang Xiantao0de10342007-11-20 16:25:04 +0800315 r = kvm_arch_set_memory_region(kvm, mem, old, user_alloc);
316 if (r) {
317 *memslot = old;
318 goto out_free;
Zhang Xiantao3ad82a72007-11-20 13:11:38 +0800319 }
320
Avi Kivity6aa8b732006-12-10 02:21:36 -0800321 kvm_free_physmem_slot(&old, &new);
322 return 0;
323
Sheng Yangf78e0e22007-10-29 09:40:42 +0800324out_free:
Avi Kivity6aa8b732006-12-10 02:21:36 -0800325 kvm_free_physmem_slot(&new, &old);
326out:
327 return r;
Izik Eidus210c7c42007-10-24 23:52:57 +0200328
329}
Sheng Yangf78e0e22007-10-29 09:40:42 +0800330EXPORT_SYMBOL_GPL(__kvm_set_memory_region);
331
332int kvm_set_memory_region(struct kvm *kvm,
333 struct kvm_userspace_memory_region *mem,
334 int user_alloc)
335{
336 int r;
337
338 mutex_lock(&kvm->lock);
339 r = __kvm_set_memory_region(kvm, mem, user_alloc);
340 mutex_unlock(&kvm->lock);
341 return r;
342}
Izik Eidus210c7c42007-10-24 23:52:57 +0200343EXPORT_SYMBOL_GPL(kvm_set_memory_region);
344
Carsten Otte1fe779f2007-10-29 16:08:35 +0100345int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
346 struct
347 kvm_userspace_memory_region *mem,
348 int user_alloc)
Izik Eidus210c7c42007-10-24 23:52:57 +0200349{
Izik Eiduse0d62c72007-10-24 23:57:46 +0200350 if (mem->slot >= KVM_MEMORY_SLOTS)
351 return -EINVAL;
Izik Eidus210c7c42007-10-24 23:52:57 +0200352 return kvm_set_memory_region(kvm, mem, user_alloc);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800353}
354
Zhang Xiantao5bb064d2007-11-18 20:29:43 +0800355int kvm_get_dirty_log(struct kvm *kvm,
356 struct kvm_dirty_log *log, int *is_dirty)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800357{
358 struct kvm_memory_slot *memslot;
359 int r, i;
360 int n;
361 unsigned long any = 0;
362
Avi Kivity6aa8b732006-12-10 02:21:36 -0800363 r = -EINVAL;
364 if (log->slot >= KVM_MEMORY_SLOTS)
365 goto out;
366
367 memslot = &kvm->memslots[log->slot];
368 r = -ENOENT;
369 if (!memslot->dirty_bitmap)
370 goto out;
371
Uri Lublincd1a4a92007-02-22 16:43:09 +0200372 n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800373
Uri Lublincd1a4a92007-02-22 16:43:09 +0200374 for (i = 0; !any && i < n/sizeof(long); ++i)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800375 any = memslot->dirty_bitmap[i];
376
377 r = -EFAULT;
378 if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n))
379 goto out;
380
Zhang Xiantao5bb064d2007-11-18 20:29:43 +0800381 if (any)
382 *is_dirty = 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800383
384 r = 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800385out:
Avi Kivity6aa8b732006-12-10 02:21:36 -0800386 return r;
387}
388
Izik Eiduscea7bb22007-10-17 19:17:48 +0200389int is_error_page(struct page *page)
390{
391 return page == bad_page;
392}
393EXPORT_SYMBOL_GPL(is_error_page);
394
Izik Eidusf9d46eb2007-11-11 22:02:22 +0200395static inline unsigned long bad_hva(void)
396{
397 return PAGE_OFFSET;
398}
399
400int kvm_is_error_hva(unsigned long addr)
401{
402 return addr == bad_hva();
403}
404EXPORT_SYMBOL_GPL(kvm_is_error_hva);
405
Izik Eidus290fc382007-09-27 14:11:22 +0200406gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
Avi Kivitye8207542007-03-30 16:54:30 +0300407{
408 int i;
409 struct kvm_mem_alias *alias;
410
411 for (i = 0; i < kvm->naliases; ++i) {
412 alias = &kvm->aliases[i];
413 if (gfn >= alias->base_gfn
414 && gfn < alias->base_gfn + alias->npages)
415 return alias->target_gfn + gfn - alias->base_gfn;
416 }
417 return gfn;
418}
419
420static struct kvm_memory_slot *__gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800421{
422 int i;
423
424 for (i = 0; i < kvm->nmemslots; ++i) {
425 struct kvm_memory_slot *memslot = &kvm->memslots[i];
426
427 if (gfn >= memslot->base_gfn
428 && gfn < memslot->base_gfn + memslot->npages)
429 return memslot;
430 }
Al Viro8b6d44c2007-02-09 16:38:40 +0000431 return NULL;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800432}
Avi Kivitye8207542007-03-30 16:54:30 +0300433
434struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
435{
436 gfn = unalias_gfn(kvm, gfn);
437 return __gfn_to_memslot(kvm, gfn);
438}
Avi Kivity6aa8b732006-12-10 02:21:36 -0800439
Izik Eiduse0d62c72007-10-24 23:57:46 +0200440int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn)
441{
442 int i;
443
444 gfn = unalias_gfn(kvm, gfn);
445 for (i = 0; i < KVM_MEMORY_SLOTS; ++i) {
446 struct kvm_memory_slot *memslot = &kvm->memslots[i];
447
448 if (gfn >= memslot->base_gfn
449 && gfn < memslot->base_gfn + memslot->npages)
450 return 1;
451 }
452 return 0;
453}
454EXPORT_SYMBOL_GPL(kvm_is_visible_gfn);
455
Izik Eidus539cb662007-11-11 22:05:04 +0200456static unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn)
457{
458 struct kvm_memory_slot *slot;
459
460 gfn = unalias_gfn(kvm, gfn);
461 slot = __gfn_to_memslot(kvm, gfn);
462 if (!slot)
463 return bad_hva();
464 return (slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE);
465}
466
Anthony Liguoriaab61cc2007-10-29 15:15:20 -0500467/*
468 * Requires current->mm->mmap_sem to be held
469 */
470static struct page *__gfn_to_page(struct kvm *kvm, gfn_t gfn)
Avi Kivity954bbbc2007-03-30 14:02:32 +0300471{
Anthony Liguori8d4e1282007-10-18 09:59:34 -0500472 struct page *page[1];
Izik Eidus539cb662007-11-11 22:05:04 +0200473 unsigned long addr;
Anthony Liguori8d4e1282007-10-18 09:59:34 -0500474 int npages;
Avi Kivity954bbbc2007-03-30 14:02:32 +0300475
Avi Kivity60395222007-10-21 11:03:36 +0200476 might_sleep();
477
Izik Eidus539cb662007-11-11 22:05:04 +0200478 addr = gfn_to_hva(kvm, gfn);
479 if (kvm_is_error_hva(addr)) {
Izik Eidus8a7ae052007-10-18 11:09:33 +0200480 get_page(bad_page);
Izik Eiduscea7bb22007-10-17 19:17:48 +0200481 return bad_page;
Izik Eidus8a7ae052007-10-18 11:09:33 +0200482 }
Izik Eidus8a7ae052007-10-18 11:09:33 +0200483
Izik Eidus539cb662007-11-11 22:05:04 +0200484 npages = get_user_pages(current, current->mm, addr, 1, 1, 1, page,
485 NULL);
486
Anthony Liguori8d4e1282007-10-18 09:59:34 -0500487 if (npages != 1) {
488 get_page(bad_page);
489 return bad_page;
Izik Eidus8a7ae052007-10-18 11:09:33 +0200490 }
Anthony Liguori8d4e1282007-10-18 09:59:34 -0500491
492 return page[0];
Avi Kivity954bbbc2007-03-30 14:02:32 +0300493}
Anthony Liguoriaab61cc2007-10-29 15:15:20 -0500494
495struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn)
496{
497 struct page *page;
498
499 down_read(&current->mm->mmap_sem);
500 page = __gfn_to_page(kvm, gfn);
501 up_read(&current->mm->mmap_sem);
502
503 return page;
504}
505
Avi Kivity954bbbc2007-03-30 14:02:32 +0300506EXPORT_SYMBOL_GPL(gfn_to_page);
507
Izik Eidusb4231d62007-11-20 11:49:33 +0200508void kvm_release_page_clean(struct page *page)
509{
510 put_page(page);
511}
512EXPORT_SYMBOL_GPL(kvm_release_page_clean);
513
514void kvm_release_page_dirty(struct page *page)
Izik Eidus8a7ae052007-10-18 11:09:33 +0200515{
516 if (!PageReserved(page))
517 SetPageDirty(page);
518 put_page(page);
519}
Izik Eidusb4231d62007-11-20 11:49:33 +0200520EXPORT_SYMBOL_GPL(kvm_release_page_dirty);
Izik Eidus8a7ae052007-10-18 11:09:33 +0200521
Izik Eidus195aefd2007-10-01 22:14:18 +0200522static int next_segment(unsigned long len, int offset)
523{
524 if (len > PAGE_SIZE - offset)
525 return PAGE_SIZE - offset;
526 else
527 return len;
528}
529
530int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
531 int len)
532{
Izik Eiduse0506bc2007-11-11 22:10:22 +0200533 int r;
534 unsigned long addr;
Izik Eidus195aefd2007-10-01 22:14:18 +0200535
Izik Eiduse0506bc2007-11-11 22:10:22 +0200536 addr = gfn_to_hva(kvm, gfn);
537 if (kvm_is_error_hva(addr))
Izik Eidus195aefd2007-10-01 22:14:18 +0200538 return -EFAULT;
Izik Eiduse0506bc2007-11-11 22:10:22 +0200539 r = copy_from_user(data, (void __user *)addr + offset, len);
540 if (r)
541 return -EFAULT;
Izik Eidus195aefd2007-10-01 22:14:18 +0200542 return 0;
543}
544EXPORT_SYMBOL_GPL(kvm_read_guest_page);
545
546int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len)
547{
548 gfn_t gfn = gpa >> PAGE_SHIFT;
549 int seg;
550 int offset = offset_in_page(gpa);
551 int ret;
552
553 while ((seg = next_segment(len, offset)) != 0) {
554 ret = kvm_read_guest_page(kvm, gfn, data, offset, seg);
555 if (ret < 0)
556 return ret;
557 offset = 0;
558 len -= seg;
559 data += seg;
560 ++gfn;
561 }
562 return 0;
563}
564EXPORT_SYMBOL_GPL(kvm_read_guest);
565
566int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
567 int offset, int len)
568{
Izik Eiduse0506bc2007-11-11 22:10:22 +0200569 int r;
570 unsigned long addr;
Izik Eidus195aefd2007-10-01 22:14:18 +0200571
Izik Eiduse0506bc2007-11-11 22:10:22 +0200572 addr = gfn_to_hva(kvm, gfn);
573 if (kvm_is_error_hva(addr))
Izik Eidus195aefd2007-10-01 22:14:18 +0200574 return -EFAULT;
Izik Eiduse0506bc2007-11-11 22:10:22 +0200575 r = copy_to_user((void __user *)addr + offset, data, len);
576 if (r)
577 return -EFAULT;
Izik Eidus195aefd2007-10-01 22:14:18 +0200578 mark_page_dirty(kvm, gfn);
579 return 0;
580}
581EXPORT_SYMBOL_GPL(kvm_write_guest_page);
582
583int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
584 unsigned long len)
585{
586 gfn_t gfn = gpa >> PAGE_SHIFT;
587 int seg;
588 int offset = offset_in_page(gpa);
589 int ret;
590
591 while ((seg = next_segment(len, offset)) != 0) {
592 ret = kvm_write_guest_page(kvm, gfn, data, offset, seg);
593 if (ret < 0)
594 return ret;
595 offset = 0;
596 len -= seg;
597 data += seg;
598 ++gfn;
599 }
600 return 0;
601}
602
603int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len)
604{
Izik Eidus3e021bf2007-11-19 11:16:57 +0200605 return kvm_write_guest_page(kvm, gfn, empty_zero_page, offset, len);
Izik Eidus195aefd2007-10-01 22:14:18 +0200606}
607EXPORT_SYMBOL_GPL(kvm_clear_guest_page);
608
609int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len)
610{
611 gfn_t gfn = gpa >> PAGE_SHIFT;
612 int seg;
613 int offset = offset_in_page(gpa);
614 int ret;
615
616 while ((seg = next_segment(len, offset)) != 0) {
617 ret = kvm_clear_guest_page(kvm, gfn, offset, seg);
618 if (ret < 0)
619 return ret;
620 offset = 0;
621 len -= seg;
622 ++gfn;
623 }
624 return 0;
625}
626EXPORT_SYMBOL_GPL(kvm_clear_guest);
627
Avi Kivity6aa8b732006-12-10 02:21:36 -0800628void mark_page_dirty(struct kvm *kvm, gfn_t gfn)
629{
Nguyen Anh Quynh31389942007-06-05 10:35:19 +0300630 struct kvm_memory_slot *memslot;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800631
Uri Lublin3b6fff12007-10-30 10:42:09 +0200632 gfn = unalias_gfn(kvm, gfn);
Rusty Russell7e9d6192007-07-31 20:41:14 +1000633 memslot = __gfn_to_memslot(kvm, gfn);
634 if (memslot && memslot->dirty_bitmap) {
635 unsigned long rel_gfn = gfn - memslot->base_gfn;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800636
Rusty Russell7e9d6192007-07-31 20:41:14 +1000637 /* avoid RMW */
638 if (!test_bit(rel_gfn, memslot->dirty_bitmap))
639 set_bit(rel_gfn, memslot->dirty_bitmap);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800640 }
641}
642
Eddie Dongb6958ce2007-07-18 12:15:21 +0300643/*
644 * The vCPU has executed a HLT instruction with in-kernel mode enabled.
645 */
Hollis Blanchard8776e512007-10-31 17:24:24 -0500646void kvm_vcpu_block(struct kvm_vcpu *vcpu)
Eddie Dongb6958ce2007-07-18 12:15:21 +0300647{
648 DECLARE_WAITQUEUE(wait, current);
649
650 add_wait_queue(&vcpu->wq, &wait);
651
652 /*
653 * We will block until either an interrupt or a signal wakes us up
654 */
He, Qingc5ec1532007-09-03 17:07:41 +0300655 while (!kvm_cpu_has_interrupt(vcpu)
656 && !signal_pending(current)
657 && vcpu->mp_state != VCPU_MP_STATE_RUNNABLE
658 && vcpu->mp_state != VCPU_MP_STATE_SIPI_RECEIVED) {
Eddie Dongb6958ce2007-07-18 12:15:21 +0300659 set_current_state(TASK_INTERRUPTIBLE);
660 vcpu_put(vcpu);
661 schedule();
662 vcpu_load(vcpu);
663 }
664
He, Qingc5ec1532007-09-03 17:07:41 +0300665 __set_current_state(TASK_RUNNING);
Eddie Dongb6958ce2007-07-18 12:15:21 +0300666 remove_wait_queue(&vcpu->wq, &wait);
Eddie Dongb6958ce2007-07-18 12:15:21 +0300667}
668
Avi Kivity6aa8b732006-12-10 02:21:36 -0800669void kvm_resched(struct kvm_vcpu *vcpu)
670{
Yaozu Dong3fca0362007-04-25 16:49:19 +0300671 if (!need_resched())
672 return;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800673 cond_resched();
Avi Kivity6aa8b732006-12-10 02:21:36 -0800674}
675EXPORT_SYMBOL_GPL(kvm_resched);
676
Avi Kivitybccf2152007-02-21 18:04:26 +0200677static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu,
678 struct kvm_interrupt *irq)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800679{
Avi Kivity6aa8b732006-12-10 02:21:36 -0800680 if (irq->irq < 0 || irq->irq >= 256)
681 return -EINVAL;
Eddie Dong97222cc2007-09-12 10:58:04 +0300682 if (irqchip_in_kernel(vcpu->kvm))
683 return -ENXIO;
Avi Kivitybccf2152007-02-21 18:04:26 +0200684 vcpu_load(vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800685
686 set_bit(irq->irq, vcpu->irq_pending);
687 set_bit(irq->irq / BITS_PER_LONG, &vcpu->irq_summary);
688
689 vcpu_put(vcpu);
690
691 return 0;
692}
693
Avi Kivity9a2bb7f2007-02-22 12:58:31 +0200694static struct page *kvm_vcpu_nopage(struct vm_area_struct *vma,
695 unsigned long address,
696 int *type)
697{
698 struct kvm_vcpu *vcpu = vma->vm_file->private_data;
699 unsigned long pgoff;
700 struct page *page;
701
Avi Kivity9a2bb7f2007-02-22 12:58:31 +0200702 pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
Avi Kivity039576c2007-03-20 12:46:50 +0200703 if (pgoff == 0)
704 page = virt_to_page(vcpu->run);
705 else if (pgoff == KVM_PIO_PAGE_OFFSET)
706 page = virt_to_page(vcpu->pio_data);
707 else
Avi Kivity9a2bb7f2007-02-22 12:58:31 +0200708 return NOPAGE_SIGBUS;
Avi Kivity9a2bb7f2007-02-22 12:58:31 +0200709 get_page(page);
Nguyen Anh Quynhcd0d9132007-07-11 14:30:54 +0300710 if (type != NULL)
711 *type = VM_FAULT_MINOR;
712
Avi Kivity9a2bb7f2007-02-22 12:58:31 +0200713 return page;
714}
715
716static struct vm_operations_struct kvm_vcpu_vm_ops = {
717 .nopage = kvm_vcpu_nopage,
718};
719
720static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma)
721{
722 vma->vm_ops = &kvm_vcpu_vm_ops;
723 return 0;
724}
725
Avi Kivitybccf2152007-02-21 18:04:26 +0200726static int kvm_vcpu_release(struct inode *inode, struct file *filp)
727{
728 struct kvm_vcpu *vcpu = filp->private_data;
729
730 fput(vcpu->kvm->filp);
731 return 0;
732}
733
734static struct file_operations kvm_vcpu_fops = {
735 .release = kvm_vcpu_release,
736 .unlocked_ioctl = kvm_vcpu_ioctl,
737 .compat_ioctl = kvm_vcpu_ioctl,
Avi Kivity9a2bb7f2007-02-22 12:58:31 +0200738 .mmap = kvm_vcpu_mmap,
Avi Kivitybccf2152007-02-21 18:04:26 +0200739};
740
741/*
742 * Allocates an inode for the vcpu.
743 */
744static int create_vcpu_fd(struct kvm_vcpu *vcpu)
745{
746 int fd, r;
747 struct inode *inode;
748 struct file *file;
749
Avi Kivityd6d28162007-06-28 08:38:16 -0400750 r = anon_inode_getfd(&fd, &inode, &file,
751 "kvm-vcpu", &kvm_vcpu_fops, vcpu);
752 if (r)
753 return r;
Avi Kivitybccf2152007-02-21 18:04:26 +0200754 atomic_inc(&vcpu->kvm->filp->f_count);
Avi Kivitybccf2152007-02-21 18:04:26 +0200755 return fd;
Avi Kivitybccf2152007-02-21 18:04:26 +0200756}
757
Avi Kivityc5ea7662007-02-20 18:41:05 +0200758/*
759 * Creates some virtual cpus. Good luck creating more than one.
760 */
761static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n)
762{
763 int r;
764 struct kvm_vcpu *vcpu;
765
Avi Kivityc5ea7662007-02-20 18:41:05 +0200766 if (!valid_vcpu(n))
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000767 return -EINVAL;
Avi Kivityc5ea7662007-02-20 18:41:05 +0200768
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +0800769 vcpu = kvm_arch_vcpu_create(kvm, n);
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000770 if (IS_ERR(vcpu))
771 return PTR_ERR(vcpu);
Avi Kivityc5ea7662007-02-20 18:41:05 +0200772
Avi Kivity15ad7142007-07-11 18:17:21 +0300773 preempt_notifier_init(&vcpu->preempt_notifier, &kvm_preempt_ops);
774
Avi Kivity26e52152007-11-20 15:30:24 +0200775 r = kvm_arch_vcpu_setup(vcpu);
776 if (r)
777 goto vcpu_destroy;
778
Shaohua Li11ec2802007-07-23 14:51:37 +0800779 mutex_lock(&kvm->lock);
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000780 if (kvm->vcpus[n]) {
781 r = -EEXIST;
Shaohua Li11ec2802007-07-23 14:51:37 +0800782 mutex_unlock(&kvm->lock);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +0800783 goto vcpu_destroy;
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000784 }
785 kvm->vcpus[n] = vcpu;
Shaohua Li11ec2802007-07-23 14:51:37 +0800786 mutex_unlock(&kvm->lock);
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000787
788 /* Now it's all set up, let userspace reach it */
Avi Kivitybccf2152007-02-21 18:04:26 +0200789 r = create_vcpu_fd(vcpu);
790 if (r < 0)
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000791 goto unlink;
Avi Kivitybccf2152007-02-21 18:04:26 +0200792 return r;
Avi Kivityc5ea7662007-02-20 18:41:05 +0200793
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000794unlink:
Shaohua Li11ec2802007-07-23 14:51:37 +0800795 mutex_lock(&kvm->lock);
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000796 kvm->vcpus[n] = NULL;
Shaohua Li11ec2802007-07-23 14:51:37 +0800797 mutex_unlock(&kvm->lock);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +0800798vcpu_destroy:
Hollis Blanchardd40ccc62007-11-19 14:04:43 -0600799 kvm_arch_vcpu_destroy(vcpu);
Avi Kivityc5ea7662007-02-20 18:41:05 +0200800 return r;
801}
802
Avi Kivity1961d272007-03-05 19:46:05 +0200803static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset)
804{
805 if (sigset) {
806 sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP));
807 vcpu->sigset_active = 1;
808 vcpu->sigset = *sigset;
809 } else
810 vcpu->sigset_active = 0;
811 return 0;
812}
813
Avi Kivitybccf2152007-02-21 18:04:26 +0200814static long kvm_vcpu_ioctl(struct file *filp,
815 unsigned int ioctl, unsigned long arg)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800816{
Avi Kivitybccf2152007-02-21 18:04:26 +0200817 struct kvm_vcpu *vcpu = filp->private_data;
Al Viro2f3669872007-02-09 16:38:35 +0000818 void __user *argp = (void __user *)arg;
Carsten Otte313a3dc2007-10-11 19:16:52 +0200819 int r;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800820
821 switch (ioctl) {
Avi Kivity9a2bb7f2007-02-22 12:58:31 +0200822 case KVM_RUN:
Avi Kivityf0fe5102007-03-07 13:11:17 +0200823 r = -EINVAL;
824 if (arg)
825 goto out;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -0500826 r = kvm_arch_vcpu_ioctl_run(vcpu, vcpu->run);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800827 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800828 case KVM_GET_REGS: {
829 struct kvm_regs kvm_regs;
830
Avi Kivitybccf2152007-02-21 18:04:26 +0200831 memset(&kvm_regs, 0, sizeof kvm_regs);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -0500832 r = kvm_arch_vcpu_ioctl_get_regs(vcpu, &kvm_regs);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800833 if (r)
834 goto out;
835 r = -EFAULT;
Al Viro2f3669872007-02-09 16:38:35 +0000836 if (copy_to_user(argp, &kvm_regs, sizeof kvm_regs))
Avi Kivity6aa8b732006-12-10 02:21:36 -0800837 goto out;
838 r = 0;
839 break;
840 }
841 case KVM_SET_REGS: {
842 struct kvm_regs kvm_regs;
843
844 r = -EFAULT;
Al Viro2f3669872007-02-09 16:38:35 +0000845 if (copy_from_user(&kvm_regs, argp, sizeof kvm_regs))
Avi Kivity6aa8b732006-12-10 02:21:36 -0800846 goto out;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -0500847 r = kvm_arch_vcpu_ioctl_set_regs(vcpu, &kvm_regs);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800848 if (r)
849 goto out;
850 r = 0;
851 break;
852 }
853 case KVM_GET_SREGS: {
854 struct kvm_sregs kvm_sregs;
855
Avi Kivitybccf2152007-02-21 18:04:26 +0200856 memset(&kvm_sregs, 0, sizeof kvm_sregs);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -0500857 r = kvm_arch_vcpu_ioctl_get_sregs(vcpu, &kvm_sregs);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800858 if (r)
859 goto out;
860 r = -EFAULT;
Al Viro2f3669872007-02-09 16:38:35 +0000861 if (copy_to_user(argp, &kvm_sregs, sizeof kvm_sregs))
Avi Kivity6aa8b732006-12-10 02:21:36 -0800862 goto out;
863 r = 0;
864 break;
865 }
866 case KVM_SET_SREGS: {
867 struct kvm_sregs kvm_sregs;
868
869 r = -EFAULT;
Al Viro2f3669872007-02-09 16:38:35 +0000870 if (copy_from_user(&kvm_sregs, argp, sizeof kvm_sregs))
Avi Kivity6aa8b732006-12-10 02:21:36 -0800871 goto out;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -0500872 r = kvm_arch_vcpu_ioctl_set_sregs(vcpu, &kvm_sregs);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800873 if (r)
874 goto out;
875 r = 0;
876 break;
877 }
878 case KVM_TRANSLATE: {
879 struct kvm_translation tr;
880
881 r = -EFAULT;
Al Viro2f3669872007-02-09 16:38:35 +0000882 if (copy_from_user(&tr, argp, sizeof tr))
Avi Kivity6aa8b732006-12-10 02:21:36 -0800883 goto out;
Zhang Xiantao8b006792007-11-16 13:05:55 +0800884 r = kvm_arch_vcpu_ioctl_translate(vcpu, &tr);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800885 if (r)
886 goto out;
887 r = -EFAULT;
Al Viro2f3669872007-02-09 16:38:35 +0000888 if (copy_to_user(argp, &tr, sizeof tr))
Avi Kivity6aa8b732006-12-10 02:21:36 -0800889 goto out;
890 r = 0;
891 break;
892 }
893 case KVM_INTERRUPT: {
894 struct kvm_interrupt irq;
895
896 r = -EFAULT;
Al Viro2f3669872007-02-09 16:38:35 +0000897 if (copy_from_user(&irq, argp, sizeof irq))
Avi Kivity6aa8b732006-12-10 02:21:36 -0800898 goto out;
Avi Kivitybccf2152007-02-21 18:04:26 +0200899 r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800900 if (r)
901 goto out;
902 r = 0;
903 break;
904 }
905 case KVM_DEBUG_GUEST: {
906 struct kvm_debug_guest dbg;
907
908 r = -EFAULT;
Al Viro2f3669872007-02-09 16:38:35 +0000909 if (copy_from_user(&dbg, argp, sizeof dbg))
Avi Kivity6aa8b732006-12-10 02:21:36 -0800910 goto out;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -0500911 r = kvm_arch_vcpu_ioctl_debug_guest(vcpu, &dbg);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800912 if (r)
913 goto out;
914 r = 0;
915 break;
916 }
Avi Kivity1961d272007-03-05 19:46:05 +0200917 case KVM_SET_SIGNAL_MASK: {
918 struct kvm_signal_mask __user *sigmask_arg = argp;
919 struct kvm_signal_mask kvm_sigmask;
920 sigset_t sigset, *p;
921
922 p = NULL;
923 if (argp) {
924 r = -EFAULT;
925 if (copy_from_user(&kvm_sigmask, argp,
926 sizeof kvm_sigmask))
927 goto out;
928 r = -EINVAL;
929 if (kvm_sigmask.len != sizeof sigset)
930 goto out;
931 r = -EFAULT;
932 if (copy_from_user(&sigset, sigmask_arg->sigset,
933 sizeof sigset))
934 goto out;
935 p = &sigset;
936 }
937 r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset);
938 break;
939 }
Avi Kivityb8836732007-04-01 16:34:31 +0300940 case KVM_GET_FPU: {
941 struct kvm_fpu fpu;
942
943 memset(&fpu, 0, sizeof fpu);
Hollis Blanchardd0752062007-10-31 17:24:25 -0500944 r = kvm_arch_vcpu_ioctl_get_fpu(vcpu, &fpu);
Avi Kivityb8836732007-04-01 16:34:31 +0300945 if (r)
946 goto out;
947 r = -EFAULT;
948 if (copy_to_user(argp, &fpu, sizeof fpu))
949 goto out;
950 r = 0;
951 break;
952 }
953 case KVM_SET_FPU: {
954 struct kvm_fpu fpu;
955
956 r = -EFAULT;
957 if (copy_from_user(&fpu, argp, sizeof fpu))
958 goto out;
Hollis Blanchardd0752062007-10-31 17:24:25 -0500959 r = kvm_arch_vcpu_ioctl_set_fpu(vcpu, &fpu);
Avi Kivityb8836732007-04-01 16:34:31 +0300960 if (r)
961 goto out;
962 r = 0;
963 break;
964 }
Avi Kivitybccf2152007-02-21 18:04:26 +0200965 default:
Carsten Otte313a3dc2007-10-11 19:16:52 +0200966 r = kvm_arch_vcpu_ioctl(filp, ioctl, arg);
Avi Kivitybccf2152007-02-21 18:04:26 +0200967 }
968out:
969 return r;
970}
971
972static long kvm_vm_ioctl(struct file *filp,
973 unsigned int ioctl, unsigned long arg)
974{
975 struct kvm *kvm = filp->private_data;
976 void __user *argp = (void __user *)arg;
Carsten Otte1fe779f2007-10-29 16:08:35 +0100977 int r;
Avi Kivitybccf2152007-02-21 18:04:26 +0200978
979 switch (ioctl) {
980 case KVM_CREATE_VCPU:
981 r = kvm_vm_ioctl_create_vcpu(kvm, arg);
982 if (r < 0)
983 goto out;
984 break;
Izik Eidus6fc138d2007-10-09 19:20:39 +0200985 case KVM_SET_USER_MEMORY_REGION: {
986 struct kvm_userspace_memory_region kvm_userspace_mem;
987
988 r = -EFAULT;
989 if (copy_from_user(&kvm_userspace_mem, argp,
990 sizeof kvm_userspace_mem))
991 goto out;
992
993 r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 1);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800994 if (r)
995 goto out;
996 break;
997 }
998 case KVM_GET_DIRTY_LOG: {
999 struct kvm_dirty_log log;
1000
1001 r = -EFAULT;
Al Viro2f3669872007-02-09 16:38:35 +00001002 if (copy_from_user(&log, argp, sizeof log))
Avi Kivity6aa8b732006-12-10 02:21:36 -08001003 goto out;
Avi Kivity2c6f5df2007-02-20 18:27:58 +02001004 r = kvm_vm_ioctl_get_dirty_log(kvm, &log);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001005 if (r)
1006 goto out;
1007 break;
1008 }
Avi Kivityf17abe92007-02-21 19:28:04 +02001009 default:
Carsten Otte1fe779f2007-10-29 16:08:35 +01001010 r = kvm_arch_vm_ioctl(filp, ioctl, arg);
Avi Kivityf17abe92007-02-21 19:28:04 +02001011 }
1012out:
1013 return r;
1014}
1015
1016static struct page *kvm_vm_nopage(struct vm_area_struct *vma,
1017 unsigned long address,
1018 int *type)
1019{
1020 struct kvm *kvm = vma->vm_file->private_data;
1021 unsigned long pgoff;
Avi Kivityf17abe92007-02-21 19:28:04 +02001022 struct page *page;
1023
Avi Kivityf17abe92007-02-21 19:28:04 +02001024 pgoff = ((address - vma->vm_start) >> PAGE_SHIFT) + vma->vm_pgoff;
Izik Eiduse0d62c72007-10-24 23:57:46 +02001025 if (!kvm_is_visible_gfn(kvm, pgoff))
1026 return NOPAGE_SIGBUS;
Anthony Liguoriaab61cc2007-10-29 15:15:20 -05001027 /* current->mm->mmap_sem is already held so call lockless version */
1028 page = __gfn_to_page(kvm, pgoff);
Izik Eidus8a7ae052007-10-18 11:09:33 +02001029 if (is_error_page(page)) {
Izik Eidusb4231d62007-11-20 11:49:33 +02001030 kvm_release_page_clean(page);
Avi Kivityf17abe92007-02-21 19:28:04 +02001031 return NOPAGE_SIGBUS;
Izik Eidus8a7ae052007-10-18 11:09:33 +02001032 }
Nguyen Anh Quynhcd0d9132007-07-11 14:30:54 +03001033 if (type != NULL)
1034 *type = VM_FAULT_MINOR;
1035
Avi Kivityf17abe92007-02-21 19:28:04 +02001036 return page;
1037}
1038
1039static struct vm_operations_struct kvm_vm_vm_ops = {
1040 .nopage = kvm_vm_nopage,
1041};
1042
1043static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma)
1044{
1045 vma->vm_ops = &kvm_vm_vm_ops;
1046 return 0;
1047}
1048
1049static struct file_operations kvm_vm_fops = {
1050 .release = kvm_vm_release,
1051 .unlocked_ioctl = kvm_vm_ioctl,
1052 .compat_ioctl = kvm_vm_ioctl,
1053 .mmap = kvm_vm_mmap,
1054};
1055
1056static int kvm_dev_ioctl_create_vm(void)
1057{
1058 int fd, r;
1059 struct inode *inode;
1060 struct file *file;
1061 struct kvm *kvm;
1062
Avi Kivityf17abe92007-02-21 19:28:04 +02001063 kvm = kvm_create_vm();
Avi Kivityd6d28162007-06-28 08:38:16 -04001064 if (IS_ERR(kvm))
1065 return PTR_ERR(kvm);
1066 r = anon_inode_getfd(&fd, &inode, &file, "kvm-vm", &kvm_vm_fops, kvm);
1067 if (r) {
1068 kvm_destroy_vm(kvm);
1069 return r;
Avi Kivityf17abe92007-02-21 19:28:04 +02001070 }
1071
Avi Kivitybccf2152007-02-21 18:04:26 +02001072 kvm->filp = file;
Avi Kivityf17abe92007-02-21 19:28:04 +02001073
Avi Kivityf17abe92007-02-21 19:28:04 +02001074 return fd;
Avi Kivityf17abe92007-02-21 19:28:04 +02001075}
1076
1077static long kvm_dev_ioctl(struct file *filp,
1078 unsigned int ioctl, unsigned long arg)
1079{
1080 void __user *argp = (void __user *)arg;
Avi Kivity07c45a32007-03-07 13:05:38 +02001081 long r = -EINVAL;
Avi Kivityf17abe92007-02-21 19:28:04 +02001082
1083 switch (ioctl) {
1084 case KVM_GET_API_VERSION:
Avi Kivityf0fe5102007-03-07 13:11:17 +02001085 r = -EINVAL;
1086 if (arg)
1087 goto out;
Avi Kivityf17abe92007-02-21 19:28:04 +02001088 r = KVM_API_VERSION;
1089 break;
1090 case KVM_CREATE_VM:
Avi Kivityf0fe5102007-03-07 13:11:17 +02001091 r = -EINVAL;
1092 if (arg)
1093 goto out;
Avi Kivityf17abe92007-02-21 19:28:04 +02001094 r = kvm_dev_ioctl_create_vm();
1095 break;
Zhang Xiantao018d00d2007-11-15 23:07:47 +08001096 case KVM_CHECK_EXTENSION:
1097 r = kvm_dev_ioctl_check_extension((long)argp);
Avi Kivity5d308f42007-03-01 17:56:20 +02001098 break;
Avi Kivity07c45a32007-03-07 13:05:38 +02001099 case KVM_GET_VCPU_MMAP_SIZE:
1100 r = -EINVAL;
1101 if (arg)
1102 goto out;
Avi Kivity039576c2007-03-20 12:46:50 +02001103 r = 2 * PAGE_SIZE;
Avi Kivity07c45a32007-03-07 13:05:38 +02001104 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001105 default:
Carsten Otte043405e2007-10-10 17:16:19 +02001106 return kvm_arch_dev_ioctl(filp, ioctl, arg);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001107 }
1108out:
1109 return r;
1110}
1111
Avi Kivity6aa8b732006-12-10 02:21:36 -08001112static struct file_operations kvm_chardev_ops = {
Avi Kivity6aa8b732006-12-10 02:21:36 -08001113 .unlocked_ioctl = kvm_dev_ioctl,
1114 .compat_ioctl = kvm_dev_ioctl,
Avi Kivity6aa8b732006-12-10 02:21:36 -08001115};
1116
1117static struct miscdevice kvm_dev = {
Avi Kivitybbe44322007-03-04 13:27:36 +02001118 KVM_MINOR,
Avi Kivity6aa8b732006-12-10 02:21:36 -08001119 "kvm",
1120 &kvm_chardev_ops,
1121};
1122
Avi Kivity1b6c0162007-05-24 13:03:52 +03001123static void hardware_enable(void *junk)
1124{
1125 int cpu = raw_smp_processor_id();
1126
1127 if (cpu_isset(cpu, cpus_hardware_enabled))
1128 return;
1129 cpu_set(cpu, cpus_hardware_enabled);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08001130 kvm_arch_hardware_enable(NULL);
Avi Kivity1b6c0162007-05-24 13:03:52 +03001131}
1132
1133static void hardware_disable(void *junk)
1134{
1135 int cpu = raw_smp_processor_id();
1136
1137 if (!cpu_isset(cpu, cpus_hardware_enabled))
1138 return;
1139 cpu_clear(cpu, cpus_hardware_enabled);
1140 decache_vcpus_on_cpu(cpu);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08001141 kvm_arch_hardware_disable(NULL);
Avi Kivity1b6c0162007-05-24 13:03:52 +03001142}
1143
Avi Kivity774c47f2007-02-12 00:54:47 -08001144static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val,
1145 void *v)
1146{
1147 int cpu = (long)v;
1148
Avi Kivity1a6f4d72007-11-11 18:37:32 +02001149 val &= ~CPU_TASKS_FROZEN;
Avi Kivity774c47f2007-02-12 00:54:47 -08001150 switch (val) {
Avi Kivitycec9ad22007-05-24 13:11:41 +03001151 case CPU_DYING:
Avi Kivity6ec8a852007-08-19 15:57:26 +03001152 printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",
1153 cpu);
1154 hardware_disable(NULL);
1155 break;
Avi Kivity774c47f2007-02-12 00:54:47 -08001156 case CPU_UP_CANCELED:
Jeremy Katz43934a32007-02-19 14:37:46 +02001157 printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",
1158 cpu);
Avi Kivity1b6c0162007-05-24 13:03:52 +03001159 smp_call_function_single(cpu, hardware_disable, NULL, 0, 1);
Avi Kivity774c47f2007-02-12 00:54:47 -08001160 break;
Jeremy Katz43934a32007-02-19 14:37:46 +02001161 case CPU_ONLINE:
1162 printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n",
1163 cpu);
Avi Kivity1b6c0162007-05-24 13:03:52 +03001164 smp_call_function_single(cpu, hardware_enable, NULL, 0, 1);
Avi Kivity774c47f2007-02-12 00:54:47 -08001165 break;
1166 }
1167 return NOTIFY_OK;
1168}
1169
Rusty Russell9a2b85c2007-07-17 23:17:55 +10001170static int kvm_reboot(struct notifier_block *notifier, unsigned long val,
Mike Dayd77c26f2007-10-08 09:02:08 -04001171 void *v)
Rusty Russell9a2b85c2007-07-17 23:17:55 +10001172{
1173 if (val == SYS_RESTART) {
1174 /*
1175 * Some (well, at least mine) BIOSes hang on reboot if
1176 * in vmx root mode.
1177 */
1178 printk(KERN_INFO "kvm: exiting hardware virtualization\n");
1179 on_each_cpu(hardware_disable, NULL, 0, 1);
1180 }
1181 return NOTIFY_OK;
1182}
1183
1184static struct notifier_block kvm_reboot_notifier = {
1185 .notifier_call = kvm_reboot,
1186 .priority = 0,
1187};
1188
Gregory Haskins2eeb2e92007-05-31 14:08:53 -04001189void kvm_io_bus_init(struct kvm_io_bus *bus)
1190{
1191 memset(bus, 0, sizeof(*bus));
1192}
1193
1194void kvm_io_bus_destroy(struct kvm_io_bus *bus)
1195{
1196 int i;
1197
1198 for (i = 0; i < bus->dev_count; i++) {
1199 struct kvm_io_device *pos = bus->devs[i];
1200
1201 kvm_iodevice_destructor(pos);
1202 }
1203}
1204
1205struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr)
1206{
1207 int i;
1208
1209 for (i = 0; i < bus->dev_count; i++) {
1210 struct kvm_io_device *pos = bus->devs[i];
1211
1212 if (pos->in_range(pos, addr))
1213 return pos;
1214 }
1215
1216 return NULL;
1217}
1218
1219void kvm_io_bus_register_dev(struct kvm_io_bus *bus, struct kvm_io_device *dev)
1220{
1221 BUG_ON(bus->dev_count > (NR_IOBUS_DEVS-1));
1222
1223 bus->devs[bus->dev_count++] = dev;
1224}
1225
Avi Kivity774c47f2007-02-12 00:54:47 -08001226static struct notifier_block kvm_cpu_notifier = {
1227 .notifier_call = kvm_cpu_hotplug,
1228 .priority = 20, /* must be > scheduler priority */
1229};
1230
Avi Kivityba1389b2007-11-18 16:24:12 +02001231static u64 vm_stat_get(void *_offset)
1232{
1233 unsigned offset = (long)_offset;
1234 u64 total = 0;
1235 struct kvm *kvm;
1236
1237 spin_lock(&kvm_lock);
1238 list_for_each_entry(kvm, &vm_list, vm_list)
1239 total += *(u32 *)((void *)kvm + offset);
1240 spin_unlock(&kvm_lock);
1241 return total;
1242}
1243
1244DEFINE_SIMPLE_ATTRIBUTE(vm_stat_fops, vm_stat_get, NULL, "%llu\n");
1245
1246static u64 vcpu_stat_get(void *_offset)
Avi Kivity1165f5f2007-04-19 17:27:43 +03001247{
1248 unsigned offset = (long)_offset;
1249 u64 total = 0;
1250 struct kvm *kvm;
1251 struct kvm_vcpu *vcpu;
1252 int i;
1253
1254 spin_lock(&kvm_lock);
1255 list_for_each_entry(kvm, &vm_list, vm_list)
1256 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
Rusty Russellfb3f0f52007-07-27 17:16:56 +10001257 vcpu = kvm->vcpus[i];
1258 if (vcpu)
1259 total += *(u32 *)((void *)vcpu + offset);
Avi Kivity1165f5f2007-04-19 17:27:43 +03001260 }
1261 spin_unlock(&kvm_lock);
1262 return total;
1263}
1264
Avi Kivityba1389b2007-11-18 16:24:12 +02001265DEFINE_SIMPLE_ATTRIBUTE(vcpu_stat_fops, vcpu_stat_get, NULL, "%llu\n");
1266
1267static struct file_operations *stat_fops[] = {
1268 [KVM_STAT_VCPU] = &vcpu_stat_fops,
1269 [KVM_STAT_VM] = &vm_stat_fops,
1270};
Avi Kivity1165f5f2007-04-19 17:27:43 +03001271
Zhang Xiantaoa16b0432007-11-16 14:38:21 +08001272static void kvm_init_debug(void)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001273{
1274 struct kvm_stats_debugfs_item *p;
1275
Al Viro8b6d44c2007-02-09 16:38:40 +00001276 debugfs_dir = debugfs_create_dir("kvm", NULL);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001277 for (p = debugfs_entries; p->name; ++p)
Avi Kivity1165f5f2007-04-19 17:27:43 +03001278 p->dentry = debugfs_create_file(p->name, 0444, debugfs_dir,
1279 (void *)(long)p->offset,
Avi Kivityba1389b2007-11-18 16:24:12 +02001280 stat_fops[p->kind]);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001281}
1282
1283static void kvm_exit_debug(void)
1284{
1285 struct kvm_stats_debugfs_item *p;
1286
1287 for (p = debugfs_entries; p->name; ++p)
1288 debugfs_remove(p->dentry);
1289 debugfs_remove(debugfs_dir);
1290}
1291
Avi Kivity59ae6c62007-02-12 00:54:48 -08001292static int kvm_suspend(struct sys_device *dev, pm_message_t state)
1293{
Avi Kivity4267c412007-05-24 13:09:41 +03001294 hardware_disable(NULL);
Avi Kivity59ae6c62007-02-12 00:54:48 -08001295 return 0;
1296}
1297
1298static int kvm_resume(struct sys_device *dev)
1299{
Avi Kivity4267c412007-05-24 13:09:41 +03001300 hardware_enable(NULL);
Avi Kivity59ae6c62007-02-12 00:54:48 -08001301 return 0;
1302}
1303
1304static struct sysdev_class kvm_sysdev_class = {
Kay Sieversaf5ca3f42007-12-20 02:09:39 +01001305 .name = "kvm",
Avi Kivity59ae6c62007-02-12 00:54:48 -08001306 .suspend = kvm_suspend,
1307 .resume = kvm_resume,
1308};
1309
1310static struct sys_device kvm_sysdev = {
1311 .id = 0,
1312 .cls = &kvm_sysdev_class,
1313};
1314
Izik Eiduscea7bb22007-10-17 19:17:48 +02001315struct page *bad_page;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001316
Avi Kivity15ad7142007-07-11 18:17:21 +03001317static inline
1318struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn)
1319{
1320 return container_of(pn, struct kvm_vcpu, preempt_notifier);
1321}
1322
1323static void kvm_sched_in(struct preempt_notifier *pn, int cpu)
1324{
1325 struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn);
1326
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08001327 kvm_arch_vcpu_load(vcpu, cpu);
Avi Kivity15ad7142007-07-11 18:17:21 +03001328}
1329
1330static void kvm_sched_out(struct preempt_notifier *pn,
1331 struct task_struct *next)
1332{
1333 struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn);
1334
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08001335 kvm_arch_vcpu_put(vcpu);
Avi Kivity15ad7142007-07-11 18:17:21 +03001336}
1337
Zhang Xiantaof8c16bb2007-11-14 20:40:21 +08001338int kvm_init(void *opaque, unsigned int vcpu_size,
Rusty Russellc16f8622007-07-30 21:12:19 +10001339 struct module *module)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001340{
1341 int r;
Yang, Sheng002c7f72007-07-31 14:23:01 +03001342 int cpu;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001343
Zhang Xiantaocb498ea2007-11-14 20:39:31 +08001344 kvm_init_debug();
1345
Zhang Xiantaof8c16bb2007-11-14 20:40:21 +08001346 r = kvm_arch_init(opaque);
1347 if (r)
1348 goto out4;
Zhang Xiantaocb498ea2007-11-14 20:39:31 +08001349
1350 bad_page = alloc_page(GFP_KERNEL | __GFP_ZERO);
1351
1352 if (bad_page == NULL) {
1353 r = -ENOMEM;
1354 goto out;
1355 }
1356
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08001357 r = kvm_arch_hardware_setup();
Avi Kivity6aa8b732006-12-10 02:21:36 -08001358 if (r < 0)
Avi Kivityca45aaa2007-03-01 19:21:03 +02001359 goto out;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001360
Yang, Sheng002c7f72007-07-31 14:23:01 +03001361 for_each_online_cpu(cpu) {
1362 smp_call_function_single(cpu,
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08001363 kvm_arch_check_processor_compat,
Yang, Sheng002c7f72007-07-31 14:23:01 +03001364 &r, 0, 1);
1365 if (r < 0)
1366 goto out_free_0;
1367 }
1368
Avi Kivity1b6c0162007-05-24 13:03:52 +03001369 on_each_cpu(hardware_enable, NULL, 0, 1);
Avi Kivity774c47f2007-02-12 00:54:47 -08001370 r = register_cpu_notifier(&kvm_cpu_notifier);
1371 if (r)
1372 goto out_free_1;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001373 register_reboot_notifier(&kvm_reboot_notifier);
1374
Avi Kivity59ae6c62007-02-12 00:54:48 -08001375 r = sysdev_class_register(&kvm_sysdev_class);
1376 if (r)
1377 goto out_free_2;
1378
1379 r = sysdev_register(&kvm_sysdev);
1380 if (r)
1381 goto out_free_3;
1382
Rusty Russellc16f8622007-07-30 21:12:19 +10001383 /* A kmem cache lets us meet the alignment requirements of fx_save. */
1384 kvm_vcpu_cache = kmem_cache_create("kvm_vcpu", vcpu_size,
Joe Perches56919c52007-11-12 20:06:51 -08001385 __alignof__(struct kvm_vcpu),
1386 0, NULL);
Rusty Russellc16f8622007-07-30 21:12:19 +10001387 if (!kvm_vcpu_cache) {
1388 r = -ENOMEM;
1389 goto out_free_4;
1390 }
1391
Avi Kivity6aa8b732006-12-10 02:21:36 -08001392 kvm_chardev_ops.owner = module;
1393
1394 r = misc_register(&kvm_dev);
1395 if (r) {
Mike Dayd77c26f2007-10-08 09:02:08 -04001396 printk(KERN_ERR "kvm: misc device register failed\n");
Avi Kivity6aa8b732006-12-10 02:21:36 -08001397 goto out_free;
1398 }
1399
Avi Kivity15ad7142007-07-11 18:17:21 +03001400 kvm_preempt_ops.sched_in = kvm_sched_in;
1401 kvm_preempt_ops.sched_out = kvm_sched_out;
1402
Avi Kivityc7addb92007-09-16 18:58:32 +02001403 return 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001404
1405out_free:
Rusty Russellc16f8622007-07-30 21:12:19 +10001406 kmem_cache_destroy(kvm_vcpu_cache);
1407out_free_4:
Avi Kivity59ae6c62007-02-12 00:54:48 -08001408 sysdev_unregister(&kvm_sysdev);
1409out_free_3:
1410 sysdev_class_unregister(&kvm_sysdev_class);
1411out_free_2:
Avi Kivity6aa8b732006-12-10 02:21:36 -08001412 unregister_reboot_notifier(&kvm_reboot_notifier);
Avi Kivity774c47f2007-02-12 00:54:47 -08001413 unregister_cpu_notifier(&kvm_cpu_notifier);
1414out_free_1:
Avi Kivity1b6c0162007-05-24 13:03:52 +03001415 on_each_cpu(hardware_disable, NULL, 0, 1);
Yang, Sheng002c7f72007-07-31 14:23:01 +03001416out_free_0:
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08001417 kvm_arch_hardware_unsetup();
Avi Kivityca45aaa2007-03-01 19:21:03 +02001418out:
Zhang Xiantaof8c16bb2007-11-14 20:40:21 +08001419 kvm_arch_exit();
Zhang Xiantaocb498ea2007-11-14 20:39:31 +08001420 kvm_exit_debug();
Zhang Xiantaocb498ea2007-11-14 20:39:31 +08001421out4:
Avi Kivity6aa8b732006-12-10 02:21:36 -08001422 return r;
1423}
Zhang Xiantaocb498ea2007-11-14 20:39:31 +08001424EXPORT_SYMBOL_GPL(kvm_init);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001425
Zhang Xiantaocb498ea2007-11-14 20:39:31 +08001426void kvm_exit(void)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001427{
1428 misc_deregister(&kvm_dev);
Rusty Russellc16f8622007-07-30 21:12:19 +10001429 kmem_cache_destroy(kvm_vcpu_cache);
Avi Kivity59ae6c62007-02-12 00:54:48 -08001430 sysdev_unregister(&kvm_sysdev);
1431 sysdev_class_unregister(&kvm_sysdev_class);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001432 unregister_reboot_notifier(&kvm_reboot_notifier);
Avi Kivity59ae6c62007-02-12 00:54:48 -08001433 unregister_cpu_notifier(&kvm_cpu_notifier);
Avi Kivity1b6c0162007-05-24 13:03:52 +03001434 on_each_cpu(hardware_disable, NULL, 0, 1);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08001435 kvm_arch_hardware_unsetup();
Zhang Xiantaof8c16bb2007-11-14 20:40:21 +08001436 kvm_arch_exit();
Avi Kivity6aa8b732006-12-10 02:21:36 -08001437 kvm_exit_debug();
Izik Eiduscea7bb22007-10-17 19:17:48 +02001438 __free_page(bad_page);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001439}
Zhang Xiantaocb498ea2007-11-14 20:39:31 +08001440EXPORT_SYMBOL_GPL(kvm_exit);