blob: 3c4fe26096fcd3917db20d8a9ecfa6188496f420 [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
Hollis Blancharde2174022007-12-03 15:30:24 -060018#include "iodev.h"
Avi Kivity6aa8b732006-12-10 02:21:36 -080019
Avi Kivityedf88412007-12-16 11:02:48 +020020#include <linux/kvm_host.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080021#include <linux/kvm.h>
22#include <linux/module.h>
23#include <linux/errno.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080024#include <linux/percpu.h>
25#include <linux/gfp.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080026#include <linux/mm.h>
27#include <linux/miscdevice.h>
28#include <linux/vmalloc.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080029#include <linux/reboot.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080030#include <linux/debugfs.h>
31#include <linux/highmem.h>
32#include <linux/file.h>
Avi Kivity59ae6c62007-02-12 00:54:48 -080033#include <linux/sysdev.h>
Avi Kivity774c47f2007-02-12 00:54:47 -080034#include <linux/cpu.h>
Alexey Dobriyane8edc6e2007-05-21 01:22:52 +040035#include <linux/sched.h>
Avi Kivityd9e368d2007-06-07 19:18:30 +030036#include <linux/cpumask.h>
37#include <linux/smp.h>
Avi Kivityd6d28162007-06-28 08:38:16 -040038#include <linux/anon_inodes.h>
Avi Kivity04d2cc72007-09-10 18:10:54 +030039#include <linux/profile.h>
Anthony Liguori7aa81cc2007-09-17 14:57:50 -050040#include <linux/kvm_para.h>
Izik Eidus6fc138d2007-10-09 19:20:39 +020041#include <linux/pagemap.h>
Anthony Liguori8d4e1282007-10-18 09:59:34 -050042#include <linux/mman.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080043
Avi Kivitye4956062007-06-28 14:15:57 -040044#include <asm/processor.h>
Avi Kivitye4956062007-06-28 14:15:57 -040045#include <asm/io.h>
46#include <asm/uaccess.h>
Izik Eidus3e021bf2007-11-19 11:16:57 +020047#include <asm/pgtable.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080048
49MODULE_AUTHOR("Qumranet");
50MODULE_LICENSE("GPL");
51
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +080052DEFINE_SPINLOCK(kvm_lock);
53LIST_HEAD(vm_list);
Avi Kivity133de902007-02-12 00:54:44 -080054
Avi Kivity1b6c0162007-05-24 13:03:52 +030055static cpumask_t cpus_hardware_enabled;
56
Rusty Russellc16f8622007-07-30 21:12:19 +100057struct kmem_cache *kvm_vcpu_cache;
58EXPORT_SYMBOL_GPL(kvm_vcpu_cache);
Avi Kivity1165f5f2007-04-19 17:27:43 +030059
Avi Kivity15ad7142007-07-11 18:17:21 +030060static __read_mostly struct preempt_ops kvm_preempt_ops;
61
Avi Kivity6aa8b732006-12-10 02:21:36 -080062static struct dentry *debugfs_dir;
63
Avi Kivitybccf2152007-02-21 18:04:26 +020064static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl,
65 unsigned long arg);
66
James Morris5aacf0c2006-12-22 01:04:55 -080067static inline int valid_vcpu(int n)
68{
69 return likely(n >= 0 && n < KVM_MAX_VCPUS);
70}
71
Avi Kivity6aa8b732006-12-10 02:21:36 -080072/*
73 * Switches to specified vcpu, until a matching vcpu_put()
74 */
Carsten Otte313a3dc2007-10-11 19:16:52 +020075void vcpu_load(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -080076{
Avi Kivity15ad7142007-07-11 18:17:21 +030077 int cpu;
78
Avi Kivitybccf2152007-02-21 18:04:26 +020079 mutex_lock(&vcpu->mutex);
Avi Kivity15ad7142007-07-11 18:17:21 +030080 cpu = get_cpu();
81 preempt_notifier_register(&vcpu->preempt_notifier);
Carsten Otte313a3dc2007-10-11 19:16:52 +020082 kvm_arch_vcpu_load(vcpu, cpu);
Avi Kivity15ad7142007-07-11 18:17:21 +030083 put_cpu();
Avi Kivitybccf2152007-02-21 18:04:26 +020084}
85
Carsten Otte313a3dc2007-10-11 19:16:52 +020086void vcpu_put(struct kvm_vcpu *vcpu)
Avi Kivity6aa8b732006-12-10 02:21:36 -080087{
Avi Kivity15ad7142007-07-11 18:17:21 +030088 preempt_disable();
Carsten Otte313a3dc2007-10-11 19:16:52 +020089 kvm_arch_vcpu_put(vcpu);
Avi Kivity15ad7142007-07-11 18:17:21 +030090 preempt_notifier_unregister(&vcpu->preempt_notifier);
91 preempt_enable();
Avi Kivity6aa8b732006-12-10 02:21:36 -080092 mutex_unlock(&vcpu->mutex);
93}
94
Avi Kivityd9e368d2007-06-07 19:18:30 +030095static void ack_flush(void *_completed)
96{
Avi Kivityd9e368d2007-06-07 19:18:30 +030097}
98
99void kvm_flush_remote_tlbs(struct kvm *kvm)
100{
Laurent Vivier49d3bd72007-10-22 16:33:07 +0200101 int i, cpu;
Avi Kivityd9e368d2007-06-07 19:18:30 +0300102 cpumask_t cpus;
103 struct kvm_vcpu *vcpu;
Avi Kivityd9e368d2007-06-07 19:18:30 +0300104
Avi Kivityd9e368d2007-06-07 19:18:30 +0300105 cpus_clear(cpus);
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000106 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
107 vcpu = kvm->vcpus[i];
108 if (!vcpu)
109 continue;
Avi Kivity3176bc32007-10-16 17:22:08 +0200110 if (test_and_set_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests))
Avi Kivityd9e368d2007-06-07 19:18:30 +0300111 continue;
112 cpu = vcpu->cpu;
113 if (cpu != -1 && cpu != raw_smp_processor_id())
Laurent Vivier49d3bd72007-10-22 16:33:07 +0200114 cpu_set(cpu, cpus);
Avi Kivityd9e368d2007-06-07 19:18:30 +0300115 }
Avi Kivity0f74a242007-11-20 23:01:14 +0200116 if (cpus_empty(cpus))
117 return;
118 ++kvm->stat.remote_tlb_flush;
Laurent Vivier49d3bd72007-10-22 16:33:07 +0200119 smp_call_function_mask(cpus, ack_flush, NULL, 1);
Avi Kivityd9e368d2007-06-07 19:18:30 +0300120}
121
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000122int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id)
123{
124 struct page *page;
125 int r;
126
127 mutex_init(&vcpu->mutex);
128 vcpu->cpu = -1;
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000129 vcpu->kvm = kvm;
130 vcpu->vcpu_id = id;
Eddie Dongb6958ce2007-07-18 12:15:21 +0300131 init_waitqueue_head(&vcpu->wq);
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000132
133 page = alloc_page(GFP_KERNEL | __GFP_ZERO);
134 if (!page) {
135 r = -ENOMEM;
136 goto fail;
137 }
138 vcpu->run = page_address(page);
139
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +0800140 r = kvm_arch_vcpu_init(vcpu);
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000141 if (r < 0)
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +0800142 goto fail_free_run;
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000143 return 0;
144
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000145fail_free_run:
146 free_page((unsigned long)vcpu->run);
147fail:
Rusty Russell76fafa52007-10-08 10:50:48 +1000148 return r;
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000149}
150EXPORT_SYMBOL_GPL(kvm_vcpu_init);
151
152void kvm_vcpu_uninit(struct kvm_vcpu *vcpu)
153{
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +0800154 kvm_arch_vcpu_uninit(vcpu);
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000155 free_page((unsigned long)vcpu->run);
156}
157EXPORT_SYMBOL_GPL(kvm_vcpu_uninit);
158
Avi Kivityf17abe92007-02-21 19:28:04 +0200159static struct kvm *kvm_create_vm(void)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800160{
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +0800161 struct kvm *kvm = kvm_arch_create_vm();
Avi Kivity6aa8b732006-12-10 02:21:36 -0800162
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +0800163 if (IS_ERR(kvm))
164 goto out;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800165
Avi Kivity6d4e4c42007-11-21 16:41:05 +0200166 kvm->mm = current->mm;
167 atomic_inc(&kvm->mm->mm_count);
Marcelo Tosattiaaee2c92007-12-20 19:18:26 -0500168 spin_lock_init(&kvm->mmu_lock);
Eddie Dong74906342007-06-19 18:05:03 +0300169 kvm_io_bus_init(&kvm->pio_bus);
Shaohua Li11ec2802007-07-23 14:51:37 +0800170 mutex_init(&kvm->lock);
Gregory Haskins2eeb2e92007-05-31 14:08:53 -0400171 kvm_io_bus_init(&kvm->mmio_bus);
Rusty Russell5e58cfe2007-07-23 17:08:21 +1000172 spin_lock(&kvm_lock);
173 list_add(&kvm->vm_list, &vm_list);
174 spin_unlock(&kvm_lock);
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +0800175out:
Avi Kivityf17abe92007-02-21 19:28:04 +0200176 return kvm;
177}
178
Avi Kivity6aa8b732006-12-10 02:21:36 -0800179/*
180 * Free any memory in @free but not in @dont.
181 */
182static void kvm_free_physmem_slot(struct kvm_memory_slot *free,
183 struct kvm_memory_slot *dont)
184{
Izik Eidus290fc382007-09-27 14:11:22 +0200185 if (!dont || free->rmap != dont->rmap)
186 vfree(free->rmap);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800187
188 if (!dont || free->dirty_bitmap != dont->dirty_bitmap)
189 vfree(free->dirty_bitmap);
190
Avi Kivity6aa8b732006-12-10 02:21:36 -0800191 free->npages = 0;
Al Viro8b6d44c2007-02-09 16:38:40 +0000192 free->dirty_bitmap = NULL;
Anthony Liguori8d4e1282007-10-18 09:59:34 -0500193 free->rmap = NULL;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800194}
195
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +0800196void kvm_free_physmem(struct kvm *kvm)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800197{
198 int i;
199
200 for (i = 0; i < kvm->nmemslots; ++i)
Al Viro8b6d44c2007-02-09 16:38:40 +0000201 kvm_free_physmem_slot(&kvm->memslots[i], NULL);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800202}
203
Avi Kivityf17abe92007-02-21 19:28:04 +0200204static void kvm_destroy_vm(struct kvm *kvm)
205{
Avi Kivity6d4e4c42007-11-21 16:41:05 +0200206 struct mm_struct *mm = kvm->mm;
207
Avi Kivity133de902007-02-12 00:54:44 -0800208 spin_lock(&kvm_lock);
209 list_del(&kvm->vm_list);
210 spin_unlock(&kvm_lock);
Eddie Dong74906342007-06-19 18:05:03 +0300211 kvm_io_bus_destroy(&kvm->pio_bus);
Gregory Haskins2eeb2e92007-05-31 14:08:53 -0400212 kvm_io_bus_destroy(&kvm->mmio_bus);
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +0800213 kvm_arch_destroy_vm(kvm);
Avi Kivity6d4e4c42007-11-21 16:41:05 +0200214 mmdrop(mm);
Avi Kivityf17abe92007-02-21 19:28:04 +0200215}
216
217static int kvm_vm_release(struct inode *inode, struct file *filp)
218{
219 struct kvm *kvm = filp->private_data;
220
221 kvm_destroy_vm(kvm);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800222 return 0;
223}
224
Avi Kivity6aa8b732006-12-10 02:21:36 -0800225/*
Avi Kivity6aa8b732006-12-10 02:21:36 -0800226 * Allocate some memory and give it an address in the guest physical address
227 * space.
228 *
229 * Discontiguous memory is allowed, mostly for framebuffers.
Sheng Yangf78e0e22007-10-29 09:40:42 +0800230 *
Marcelo Tosatti10589a42007-12-20 19:18:22 -0500231 * Must be called holding mmap_sem for write.
Avi Kivity6aa8b732006-12-10 02:21:36 -0800232 */
Sheng Yangf78e0e22007-10-29 09:40:42 +0800233int __kvm_set_memory_region(struct kvm *kvm,
234 struct kvm_userspace_memory_region *mem,
235 int user_alloc)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800236{
237 int r;
238 gfn_t base_gfn;
239 unsigned long npages;
240 unsigned long i;
241 struct kvm_memory_slot *memslot;
242 struct kvm_memory_slot old, new;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800243
244 r = -EINVAL;
245 /* General sanity checks */
246 if (mem->memory_size & (PAGE_SIZE - 1))
247 goto out;
248 if (mem->guest_phys_addr & (PAGE_SIZE - 1))
249 goto out;
Izik Eiduse0d62c72007-10-24 23:57:46 +0200250 if (mem->slot >= KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800251 goto out;
252 if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr)
253 goto out;
254
255 memslot = &kvm->memslots[mem->slot];
256 base_gfn = mem->guest_phys_addr >> PAGE_SHIFT;
257 npages = mem->memory_size >> PAGE_SHIFT;
258
259 if (!npages)
260 mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES;
261
Avi Kivity6aa8b732006-12-10 02:21:36 -0800262 new = old = *memslot;
263
264 new.base_gfn = base_gfn;
265 new.npages = npages;
266 new.flags = mem->flags;
267
268 /* Disallow changing a memory slot's size. */
269 r = -EINVAL;
270 if (npages && old.npages && npages != old.npages)
Sheng Yangf78e0e22007-10-29 09:40:42 +0800271 goto out_free;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800272
273 /* Check for overlaps */
274 r = -EEXIST;
275 for (i = 0; i < KVM_MEMORY_SLOTS; ++i) {
276 struct kvm_memory_slot *s = &kvm->memslots[i];
277
278 if (s == memslot)
279 continue;
280 if (!((base_gfn + npages <= s->base_gfn) ||
281 (base_gfn >= s->base_gfn + s->npages)))
Sheng Yangf78e0e22007-10-29 09:40:42 +0800282 goto out_free;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800283 }
Avi Kivity6aa8b732006-12-10 02:21:36 -0800284
Avi Kivity6aa8b732006-12-10 02:21:36 -0800285 /* Free page dirty bitmap if unneeded */
286 if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES))
Al Viro8b6d44c2007-02-09 16:38:40 +0000287 new.dirty_bitmap = NULL;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800288
289 r = -ENOMEM;
290
291 /* Allocate if a slot is being created */
Anthony Liguori8d4e1282007-10-18 09:59:34 -0500292 if (npages && !new.rmap) {
Mike Dayd77c26f2007-10-08 09:02:08 -0400293 new.rmap = vmalloc(npages * sizeof(struct page *));
Izik Eidus290fc382007-09-27 14:11:22 +0200294
295 if (!new.rmap)
Sheng Yangf78e0e22007-10-29 09:40:42 +0800296 goto out_free;
Izik Eidus290fc382007-09-27 14:11:22 +0200297
Izik Eidus290fc382007-09-27 14:11:22 +0200298 memset(new.rmap, 0, npages * sizeof(*new.rmap));
Anthony Liguori8d4e1282007-10-18 09:59:34 -0500299
Izik Eidus80b14b52007-10-25 11:54:04 +0200300 new.user_alloc = user_alloc;
Zhang Xiantao0de10342007-11-20 16:25:04 +0800301 new.userspace_addr = mem->userspace_addr;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800302 }
303
304 /* Allocate page dirty bitmap if needed */
305 if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) {
306 unsigned dirty_bytes = ALIGN(npages, BITS_PER_LONG) / 8;
307
308 new.dirty_bitmap = vmalloc(dirty_bytes);
309 if (!new.dirty_bitmap)
Sheng Yangf78e0e22007-10-29 09:40:42 +0800310 goto out_free;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800311 memset(new.dirty_bitmap, 0, dirty_bytes);
312 }
313
Avi Kivity6aa8b732006-12-10 02:21:36 -0800314 if (mem->slot >= kvm->nmemslots)
315 kvm->nmemslots = mem->slot + 1;
316
317 *memslot = new;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800318
Zhang Xiantao0de10342007-11-20 16:25:04 +0800319 r = kvm_arch_set_memory_region(kvm, mem, old, user_alloc);
320 if (r) {
321 *memslot = old;
322 goto out_free;
Zhang Xiantao3ad82a72007-11-20 13:11:38 +0800323 }
324
Avi Kivity6aa8b732006-12-10 02:21:36 -0800325 kvm_free_physmem_slot(&old, &new);
326 return 0;
327
Sheng Yangf78e0e22007-10-29 09:40:42 +0800328out_free:
Avi Kivity6aa8b732006-12-10 02:21:36 -0800329 kvm_free_physmem_slot(&new, &old);
330out:
331 return r;
Izik Eidus210c7c42007-10-24 23:52:57 +0200332
333}
Sheng Yangf78e0e22007-10-29 09:40:42 +0800334EXPORT_SYMBOL_GPL(__kvm_set_memory_region);
335
336int kvm_set_memory_region(struct kvm *kvm,
337 struct kvm_userspace_memory_region *mem,
338 int user_alloc)
339{
340 int r;
341
Marcelo Tosatti10589a42007-12-20 19:18:22 -0500342 down_write(&current->mm->mmap_sem);
Sheng Yangf78e0e22007-10-29 09:40:42 +0800343 r = __kvm_set_memory_region(kvm, mem, user_alloc);
Marcelo Tosatti10589a42007-12-20 19:18:22 -0500344 up_write(&current->mm->mmap_sem);
Sheng Yangf78e0e22007-10-29 09:40:42 +0800345 return r;
346}
Izik Eidus210c7c42007-10-24 23:52:57 +0200347EXPORT_SYMBOL_GPL(kvm_set_memory_region);
348
Carsten Otte1fe779f2007-10-29 16:08:35 +0100349int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
350 struct
351 kvm_userspace_memory_region *mem,
352 int user_alloc)
Izik Eidus210c7c42007-10-24 23:52:57 +0200353{
Izik Eiduse0d62c72007-10-24 23:57:46 +0200354 if (mem->slot >= KVM_MEMORY_SLOTS)
355 return -EINVAL;
Izik Eidus210c7c42007-10-24 23:52:57 +0200356 return kvm_set_memory_region(kvm, mem, user_alloc);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800357}
358
Zhang Xiantao5bb064d2007-11-18 20:29:43 +0800359int kvm_get_dirty_log(struct kvm *kvm,
360 struct kvm_dirty_log *log, int *is_dirty)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800361{
362 struct kvm_memory_slot *memslot;
363 int r, i;
364 int n;
365 unsigned long any = 0;
366
Avi Kivity6aa8b732006-12-10 02:21:36 -0800367 r = -EINVAL;
368 if (log->slot >= KVM_MEMORY_SLOTS)
369 goto out;
370
371 memslot = &kvm->memslots[log->slot];
372 r = -ENOENT;
373 if (!memslot->dirty_bitmap)
374 goto out;
375
Uri Lublincd1a4a92007-02-22 16:43:09 +0200376 n = ALIGN(memslot->npages, BITS_PER_LONG) / 8;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800377
Uri Lublincd1a4a92007-02-22 16:43:09 +0200378 for (i = 0; !any && i < n/sizeof(long); ++i)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800379 any = memslot->dirty_bitmap[i];
380
381 r = -EFAULT;
382 if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n))
383 goto out;
384
Zhang Xiantao5bb064d2007-11-18 20:29:43 +0800385 if (any)
386 *is_dirty = 1;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800387
388 r = 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800389out:
Avi Kivity6aa8b732006-12-10 02:21:36 -0800390 return r;
391}
392
Izik Eiduscea7bb22007-10-17 19:17:48 +0200393int is_error_page(struct page *page)
394{
395 return page == bad_page;
396}
397EXPORT_SYMBOL_GPL(is_error_page);
398
Izik Eidusf9d46eb2007-11-11 22:02:22 +0200399static inline unsigned long bad_hva(void)
400{
401 return PAGE_OFFSET;
402}
403
404int kvm_is_error_hva(unsigned long addr)
405{
406 return addr == bad_hva();
407}
408EXPORT_SYMBOL_GPL(kvm_is_error_hva);
409
Avi Kivitye8207542007-03-30 16:54:30 +0300410static struct kvm_memory_slot *__gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800411{
412 int i;
413
414 for (i = 0; i < kvm->nmemslots; ++i) {
415 struct kvm_memory_slot *memslot = &kvm->memslots[i];
416
417 if (gfn >= memslot->base_gfn
418 && gfn < memslot->base_gfn + memslot->npages)
419 return memslot;
420 }
Al Viro8b6d44c2007-02-09 16:38:40 +0000421 return NULL;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800422}
Avi Kivitye8207542007-03-30 16:54:30 +0300423
424struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn)
425{
426 gfn = unalias_gfn(kvm, gfn);
427 return __gfn_to_memslot(kvm, gfn);
428}
Avi Kivity6aa8b732006-12-10 02:21:36 -0800429
Izik Eiduse0d62c72007-10-24 23:57:46 +0200430int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn)
431{
432 int i;
433
434 gfn = unalias_gfn(kvm, gfn);
435 for (i = 0; i < KVM_MEMORY_SLOTS; ++i) {
436 struct kvm_memory_slot *memslot = &kvm->memslots[i];
437
438 if (gfn >= memslot->base_gfn
439 && gfn < memslot->base_gfn + memslot->npages)
440 return 1;
441 }
442 return 0;
443}
444EXPORT_SYMBOL_GPL(kvm_is_visible_gfn);
445
Izik Eidus539cb662007-11-11 22:05:04 +0200446static unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn)
447{
448 struct kvm_memory_slot *slot;
449
450 gfn = unalias_gfn(kvm, gfn);
451 slot = __gfn_to_memslot(kvm, gfn);
452 if (!slot)
453 return bad_hva();
454 return (slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE);
455}
456
Anthony Liguoriaab61cc2007-10-29 15:15:20 -0500457/*
458 * Requires current->mm->mmap_sem to be held
459 */
Marcelo Tosatti10589a42007-12-20 19:18:22 -0500460struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn)
Avi Kivity954bbbc22007-03-30 14:02:32 +0300461{
Anthony Liguori8d4e1282007-10-18 09:59:34 -0500462 struct page *page[1];
Izik Eidus539cb662007-11-11 22:05:04 +0200463 unsigned long addr;
Anthony Liguori8d4e1282007-10-18 09:59:34 -0500464 int npages;
Avi Kivity954bbbc22007-03-30 14:02:32 +0300465
Avi Kivity60395222007-10-21 11:03:36 +0200466 might_sleep();
467
Izik Eidus539cb662007-11-11 22:05:04 +0200468 addr = gfn_to_hva(kvm, gfn);
469 if (kvm_is_error_hva(addr)) {
Izik Eidus8a7ae052007-10-18 11:09:33 +0200470 get_page(bad_page);
Izik Eiduscea7bb22007-10-17 19:17:48 +0200471 return bad_page;
Izik Eidus8a7ae052007-10-18 11:09:33 +0200472 }
Izik Eidus8a7ae052007-10-18 11:09:33 +0200473
Izik Eidus539cb662007-11-11 22:05:04 +0200474 npages = get_user_pages(current, current->mm, addr, 1, 1, 1, page,
475 NULL);
476
Anthony Liguori8d4e1282007-10-18 09:59:34 -0500477 if (npages != 1) {
478 get_page(bad_page);
479 return bad_page;
Izik Eidus8a7ae052007-10-18 11:09:33 +0200480 }
Anthony Liguori8d4e1282007-10-18 09:59:34 -0500481
482 return page[0];
Avi Kivity954bbbc22007-03-30 14:02:32 +0300483}
Anthony Liguoriaab61cc2007-10-29 15:15:20 -0500484
Avi Kivity954bbbc22007-03-30 14:02:32 +0300485EXPORT_SYMBOL_GPL(gfn_to_page);
486
Izik Eidusb4231d62007-11-20 11:49:33 +0200487void kvm_release_page_clean(struct page *page)
488{
489 put_page(page);
490}
491EXPORT_SYMBOL_GPL(kvm_release_page_clean);
492
493void kvm_release_page_dirty(struct page *page)
Izik Eidus8a7ae052007-10-18 11:09:33 +0200494{
495 if (!PageReserved(page))
496 SetPageDirty(page);
497 put_page(page);
498}
Izik Eidusb4231d62007-11-20 11:49:33 +0200499EXPORT_SYMBOL_GPL(kvm_release_page_dirty);
Izik Eidus8a7ae052007-10-18 11:09:33 +0200500
Izik Eidus195aefd2007-10-01 22:14:18 +0200501static int next_segment(unsigned long len, int offset)
502{
503 if (len > PAGE_SIZE - offset)
504 return PAGE_SIZE - offset;
505 else
506 return len;
507}
508
509int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
510 int len)
511{
Izik Eiduse0506bc2007-11-11 22:10:22 +0200512 int r;
513 unsigned long addr;
Izik Eidus195aefd2007-10-01 22:14:18 +0200514
Izik Eiduse0506bc2007-11-11 22:10:22 +0200515 addr = gfn_to_hva(kvm, gfn);
516 if (kvm_is_error_hva(addr))
Izik Eidus195aefd2007-10-01 22:14:18 +0200517 return -EFAULT;
Izik Eiduse0506bc2007-11-11 22:10:22 +0200518 r = copy_from_user(data, (void __user *)addr + offset, len);
519 if (r)
520 return -EFAULT;
Izik Eidus195aefd2007-10-01 22:14:18 +0200521 return 0;
522}
523EXPORT_SYMBOL_GPL(kvm_read_guest_page);
524
525int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len)
526{
527 gfn_t gfn = gpa >> PAGE_SHIFT;
528 int seg;
529 int offset = offset_in_page(gpa);
530 int ret;
531
532 while ((seg = next_segment(len, offset)) != 0) {
533 ret = kvm_read_guest_page(kvm, gfn, data, offset, seg);
534 if (ret < 0)
535 return ret;
536 offset = 0;
537 len -= seg;
538 data += seg;
539 ++gfn;
540 }
541 return 0;
542}
543EXPORT_SYMBOL_GPL(kvm_read_guest);
544
Marcelo Tosatti7ec54582007-12-20 19:18:23 -0500545int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
546 unsigned long len)
547{
548 int r;
549 unsigned long addr;
550 gfn_t gfn = gpa >> PAGE_SHIFT;
551 int offset = offset_in_page(gpa);
552
553 addr = gfn_to_hva(kvm, gfn);
554 if (kvm_is_error_hva(addr))
555 return -EFAULT;
Marcelo Tosatti7ec54582007-12-20 19:18:23 -0500556 r = __copy_from_user_inatomic(data, (void __user *)addr + offset, len);
Marcelo Tosatti7ec54582007-12-20 19:18:23 -0500557 if (r)
558 return -EFAULT;
559 return 0;
560}
561EXPORT_SYMBOL(kvm_read_guest_atomic);
562
Izik Eidus195aefd2007-10-01 22:14:18 +0200563int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
564 int offset, int len)
565{
Izik Eiduse0506bc2007-11-11 22:10:22 +0200566 int r;
567 unsigned long addr;
Izik Eidus195aefd2007-10-01 22:14:18 +0200568
Izik Eiduse0506bc2007-11-11 22:10:22 +0200569 addr = gfn_to_hva(kvm, gfn);
570 if (kvm_is_error_hva(addr))
Izik Eidus195aefd2007-10-01 22:14:18 +0200571 return -EFAULT;
Izik Eiduse0506bc2007-11-11 22:10:22 +0200572 r = copy_to_user((void __user *)addr + offset, data, len);
573 if (r)
574 return -EFAULT;
Izik Eidus195aefd2007-10-01 22:14:18 +0200575 mark_page_dirty(kvm, gfn);
576 return 0;
577}
578EXPORT_SYMBOL_GPL(kvm_write_guest_page);
579
580int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
581 unsigned long len)
582{
583 gfn_t gfn = gpa >> PAGE_SHIFT;
584 int seg;
585 int offset = offset_in_page(gpa);
586 int ret;
587
588 while ((seg = next_segment(len, offset)) != 0) {
589 ret = kvm_write_guest_page(kvm, gfn, data, offset, seg);
590 if (ret < 0)
591 return ret;
592 offset = 0;
593 len -= seg;
594 data += seg;
595 ++gfn;
596 }
597 return 0;
598}
599
600int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len)
601{
Izik Eidus3e021bf2007-11-19 11:16:57 +0200602 return kvm_write_guest_page(kvm, gfn, empty_zero_page, offset, len);
Izik Eidus195aefd2007-10-01 22:14:18 +0200603}
604EXPORT_SYMBOL_GPL(kvm_clear_guest_page);
605
606int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len)
607{
608 gfn_t gfn = gpa >> PAGE_SHIFT;
609 int seg;
610 int offset = offset_in_page(gpa);
611 int ret;
612
613 while ((seg = next_segment(len, offset)) != 0) {
614 ret = kvm_clear_guest_page(kvm, gfn, offset, seg);
615 if (ret < 0)
616 return ret;
617 offset = 0;
618 len -= seg;
619 ++gfn;
620 }
621 return 0;
622}
623EXPORT_SYMBOL_GPL(kvm_clear_guest);
624
Avi Kivity6aa8b732006-12-10 02:21:36 -0800625void mark_page_dirty(struct kvm *kvm, gfn_t gfn)
626{
Nguyen Anh Quynh31389942007-06-05 10:35:19 +0300627 struct kvm_memory_slot *memslot;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800628
Uri Lublin3b6fff12007-10-30 10:42:09 +0200629 gfn = unalias_gfn(kvm, gfn);
Rusty Russell7e9d6192007-07-31 20:41:14 +1000630 memslot = __gfn_to_memslot(kvm, gfn);
631 if (memslot && memslot->dirty_bitmap) {
632 unsigned long rel_gfn = gfn - memslot->base_gfn;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800633
Rusty Russell7e9d6192007-07-31 20:41:14 +1000634 /* avoid RMW */
635 if (!test_bit(rel_gfn, memslot->dirty_bitmap))
636 set_bit(rel_gfn, memslot->dirty_bitmap);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800637 }
638}
639
Eddie Dongb6958ce2007-07-18 12:15:21 +0300640/*
641 * The vCPU has executed a HLT instruction with in-kernel mode enabled.
642 */
Hollis Blanchard8776e512007-10-31 17:24:24 -0500643void kvm_vcpu_block(struct kvm_vcpu *vcpu)
Eddie Dongb6958ce2007-07-18 12:15:21 +0300644{
645 DECLARE_WAITQUEUE(wait, current);
646
647 add_wait_queue(&vcpu->wq, &wait);
648
649 /*
650 * We will block until either an interrupt or a signal wakes us up
651 */
He, Qingc5ec1532007-09-03 17:07:41 +0300652 while (!kvm_cpu_has_interrupt(vcpu)
653 && !signal_pending(current)
Hollis Blanchard53e0aa72007-12-03 16:15:26 -0600654 && !kvm_arch_vcpu_runnable(vcpu)) {
Eddie Dongb6958ce2007-07-18 12:15:21 +0300655 set_current_state(TASK_INTERRUPTIBLE);
656 vcpu_put(vcpu);
657 schedule();
658 vcpu_load(vcpu);
659 }
660
He, Qingc5ec1532007-09-03 17:07:41 +0300661 __set_current_state(TASK_RUNNING);
Eddie Dongb6958ce2007-07-18 12:15:21 +0300662 remove_wait_queue(&vcpu->wq, &wait);
Eddie Dongb6958ce2007-07-18 12:15:21 +0300663}
664
Avi Kivity6aa8b732006-12-10 02:21:36 -0800665void kvm_resched(struct kvm_vcpu *vcpu)
666{
Yaozu Dong3fca0362007-04-25 16:49:19 +0300667 if (!need_resched())
668 return;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800669 cond_resched();
Avi Kivity6aa8b732006-12-10 02:21:36 -0800670}
671EXPORT_SYMBOL_GPL(kvm_resched);
672
npiggin@suse.dee4a533a2007-12-05 18:15:52 +1100673static int kvm_vcpu_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
Avi Kivity9a2bb7f2007-02-22 12:58:31 +0200674{
675 struct kvm_vcpu *vcpu = vma->vm_file->private_data;
Avi Kivity9a2bb7f2007-02-22 12:58:31 +0200676 struct page *page;
677
npiggin@suse.dee4a533a2007-12-05 18:15:52 +1100678 if (vmf->pgoff == 0)
Avi Kivity039576c2007-03-20 12:46:50 +0200679 page = virt_to_page(vcpu->run);
npiggin@suse.dee4a533a2007-12-05 18:15:52 +1100680 else if (vmf->pgoff == KVM_PIO_PAGE_OFFSET)
Zhang Xiantaoad312c72007-12-13 23:50:52 +0800681 page = virt_to_page(vcpu->arch.pio_data);
Avi Kivity039576c2007-03-20 12:46:50 +0200682 else
npiggin@suse.dee4a533a2007-12-05 18:15:52 +1100683 return VM_FAULT_SIGBUS;
Avi Kivity9a2bb7f2007-02-22 12:58:31 +0200684 get_page(page);
npiggin@suse.dee4a533a2007-12-05 18:15:52 +1100685 vmf->page = page;
686 return 0;
Avi Kivity9a2bb7f2007-02-22 12:58:31 +0200687}
688
689static struct vm_operations_struct kvm_vcpu_vm_ops = {
npiggin@suse.dee4a533a2007-12-05 18:15:52 +1100690 .fault = kvm_vcpu_fault,
Avi Kivity9a2bb7f2007-02-22 12:58:31 +0200691};
692
693static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma)
694{
695 vma->vm_ops = &kvm_vcpu_vm_ops;
696 return 0;
697}
698
Avi Kivitybccf2152007-02-21 18:04:26 +0200699static int kvm_vcpu_release(struct inode *inode, struct file *filp)
700{
701 struct kvm_vcpu *vcpu = filp->private_data;
702
703 fput(vcpu->kvm->filp);
704 return 0;
705}
706
707static struct file_operations kvm_vcpu_fops = {
708 .release = kvm_vcpu_release,
709 .unlocked_ioctl = kvm_vcpu_ioctl,
710 .compat_ioctl = kvm_vcpu_ioctl,
Avi Kivity9a2bb7f2007-02-22 12:58:31 +0200711 .mmap = kvm_vcpu_mmap,
Avi Kivitybccf2152007-02-21 18:04:26 +0200712};
713
714/*
715 * Allocates an inode for the vcpu.
716 */
717static int create_vcpu_fd(struct kvm_vcpu *vcpu)
718{
719 int fd, r;
720 struct inode *inode;
721 struct file *file;
722
Avi Kivityd6d28162007-06-28 08:38:16 -0400723 r = anon_inode_getfd(&fd, &inode, &file,
724 "kvm-vcpu", &kvm_vcpu_fops, vcpu);
725 if (r)
726 return r;
Avi Kivitybccf2152007-02-21 18:04:26 +0200727 atomic_inc(&vcpu->kvm->filp->f_count);
Avi Kivitybccf2152007-02-21 18:04:26 +0200728 return fd;
Avi Kivitybccf2152007-02-21 18:04:26 +0200729}
730
Avi Kivityc5ea7662007-02-20 18:41:05 +0200731/*
732 * Creates some virtual cpus. Good luck creating more than one.
733 */
734static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n)
735{
736 int r;
737 struct kvm_vcpu *vcpu;
738
Avi Kivityc5ea7662007-02-20 18:41:05 +0200739 if (!valid_vcpu(n))
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000740 return -EINVAL;
Avi Kivityc5ea7662007-02-20 18:41:05 +0200741
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +0800742 vcpu = kvm_arch_vcpu_create(kvm, n);
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000743 if (IS_ERR(vcpu))
744 return PTR_ERR(vcpu);
Avi Kivityc5ea7662007-02-20 18:41:05 +0200745
Avi Kivity15ad7142007-07-11 18:17:21 +0300746 preempt_notifier_init(&vcpu->preempt_notifier, &kvm_preempt_ops);
747
Avi Kivity26e52152007-11-20 15:30:24 +0200748 r = kvm_arch_vcpu_setup(vcpu);
749 if (r)
750 goto vcpu_destroy;
751
Shaohua Li11ec2802007-07-23 14:51:37 +0800752 mutex_lock(&kvm->lock);
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000753 if (kvm->vcpus[n]) {
754 r = -EEXIST;
Shaohua Li11ec2802007-07-23 14:51:37 +0800755 mutex_unlock(&kvm->lock);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +0800756 goto vcpu_destroy;
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000757 }
758 kvm->vcpus[n] = vcpu;
Shaohua Li11ec2802007-07-23 14:51:37 +0800759 mutex_unlock(&kvm->lock);
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000760
761 /* Now it's all set up, let userspace reach it */
Avi Kivitybccf2152007-02-21 18:04:26 +0200762 r = create_vcpu_fd(vcpu);
763 if (r < 0)
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000764 goto unlink;
Avi Kivitybccf2152007-02-21 18:04:26 +0200765 return r;
Avi Kivityc5ea7662007-02-20 18:41:05 +0200766
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000767unlink:
Shaohua Li11ec2802007-07-23 14:51:37 +0800768 mutex_lock(&kvm->lock);
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000769 kvm->vcpus[n] = NULL;
Shaohua Li11ec2802007-07-23 14:51:37 +0800770 mutex_unlock(&kvm->lock);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +0800771vcpu_destroy:
Hollis Blanchardd40ccc62007-11-19 14:04:43 -0600772 kvm_arch_vcpu_destroy(vcpu);
Avi Kivityc5ea7662007-02-20 18:41:05 +0200773 return r;
774}
775
Avi Kivity1961d272007-03-05 19:46:05 +0200776static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset)
777{
778 if (sigset) {
779 sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP));
780 vcpu->sigset_active = 1;
781 vcpu->sigset = *sigset;
782 } else
783 vcpu->sigset_active = 0;
784 return 0;
785}
786
Avi Kivitybccf2152007-02-21 18:04:26 +0200787static long kvm_vcpu_ioctl(struct file *filp,
788 unsigned int ioctl, unsigned long arg)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800789{
Avi Kivitybccf2152007-02-21 18:04:26 +0200790 struct kvm_vcpu *vcpu = filp->private_data;
Al Viro2f366982007-02-09 16:38:35 +0000791 void __user *argp = (void __user *)arg;
Carsten Otte313a3dc2007-10-11 19:16:52 +0200792 int r;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800793
Avi Kivity6d4e4c42007-11-21 16:41:05 +0200794 if (vcpu->kvm->mm != current->mm)
795 return -EIO;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800796 switch (ioctl) {
Avi Kivity9a2bb7f2007-02-22 12:58:31 +0200797 case KVM_RUN:
Avi Kivityf0fe5102007-03-07 13:11:17 +0200798 r = -EINVAL;
799 if (arg)
800 goto out;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -0500801 r = kvm_arch_vcpu_ioctl_run(vcpu, vcpu->run);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800802 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800803 case KVM_GET_REGS: {
804 struct kvm_regs kvm_regs;
805
Avi Kivitybccf2152007-02-21 18:04:26 +0200806 memset(&kvm_regs, 0, sizeof kvm_regs);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -0500807 r = kvm_arch_vcpu_ioctl_get_regs(vcpu, &kvm_regs);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800808 if (r)
809 goto out;
810 r = -EFAULT;
Al Viro2f366982007-02-09 16:38:35 +0000811 if (copy_to_user(argp, &kvm_regs, sizeof kvm_regs))
Avi Kivity6aa8b732006-12-10 02:21:36 -0800812 goto out;
813 r = 0;
814 break;
815 }
816 case KVM_SET_REGS: {
817 struct kvm_regs kvm_regs;
818
819 r = -EFAULT;
Al Viro2f366982007-02-09 16:38:35 +0000820 if (copy_from_user(&kvm_regs, argp, sizeof kvm_regs))
Avi Kivity6aa8b732006-12-10 02:21:36 -0800821 goto out;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -0500822 r = kvm_arch_vcpu_ioctl_set_regs(vcpu, &kvm_regs);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800823 if (r)
824 goto out;
825 r = 0;
826 break;
827 }
828 case KVM_GET_SREGS: {
829 struct kvm_sregs kvm_sregs;
830
Avi Kivitybccf2152007-02-21 18:04:26 +0200831 memset(&kvm_sregs, 0, sizeof kvm_sregs);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -0500832 r = kvm_arch_vcpu_ioctl_get_sregs(vcpu, &kvm_sregs);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800833 if (r)
834 goto out;
835 r = -EFAULT;
Al Viro2f366982007-02-09 16:38:35 +0000836 if (copy_to_user(argp, &kvm_sregs, sizeof kvm_sregs))
Avi Kivity6aa8b732006-12-10 02:21:36 -0800837 goto out;
838 r = 0;
839 break;
840 }
841 case KVM_SET_SREGS: {
842 struct kvm_sregs kvm_sregs;
843
844 r = -EFAULT;
Al Viro2f366982007-02-09 16:38:35 +0000845 if (copy_from_user(&kvm_sregs, argp, sizeof kvm_sregs))
Avi Kivity6aa8b732006-12-10 02:21:36 -0800846 goto out;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -0500847 r = kvm_arch_vcpu_ioctl_set_sregs(vcpu, &kvm_sregs);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800848 if (r)
849 goto out;
850 r = 0;
851 break;
852 }
853 case KVM_TRANSLATE: {
854 struct kvm_translation tr;
855
856 r = -EFAULT;
Al Viro2f366982007-02-09 16:38:35 +0000857 if (copy_from_user(&tr, argp, sizeof tr))
Avi Kivity6aa8b732006-12-10 02:21:36 -0800858 goto out;
Zhang Xiantao8b006792007-11-16 13:05:55 +0800859 r = kvm_arch_vcpu_ioctl_translate(vcpu, &tr);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800860 if (r)
861 goto out;
862 r = -EFAULT;
Al Viro2f366982007-02-09 16:38:35 +0000863 if (copy_to_user(argp, &tr, sizeof tr))
Avi Kivity6aa8b732006-12-10 02:21:36 -0800864 goto out;
865 r = 0;
866 break;
867 }
Avi Kivity6aa8b732006-12-10 02:21:36 -0800868 case KVM_DEBUG_GUEST: {
869 struct kvm_debug_guest dbg;
870
871 r = -EFAULT;
Al Viro2f366982007-02-09 16:38:35 +0000872 if (copy_from_user(&dbg, argp, sizeof dbg))
Avi Kivity6aa8b732006-12-10 02:21:36 -0800873 goto out;
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -0500874 r = kvm_arch_vcpu_ioctl_debug_guest(vcpu, &dbg);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800875 if (r)
876 goto out;
877 r = 0;
878 break;
879 }
Avi Kivity1961d272007-03-05 19:46:05 +0200880 case KVM_SET_SIGNAL_MASK: {
881 struct kvm_signal_mask __user *sigmask_arg = argp;
882 struct kvm_signal_mask kvm_sigmask;
883 sigset_t sigset, *p;
884
885 p = NULL;
886 if (argp) {
887 r = -EFAULT;
888 if (copy_from_user(&kvm_sigmask, argp,
889 sizeof kvm_sigmask))
890 goto out;
891 r = -EINVAL;
892 if (kvm_sigmask.len != sizeof sigset)
893 goto out;
894 r = -EFAULT;
895 if (copy_from_user(&sigset, sigmask_arg->sigset,
896 sizeof sigset))
897 goto out;
898 p = &sigset;
899 }
900 r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset);
901 break;
902 }
Avi Kivityb8836732007-04-01 16:34:31 +0300903 case KVM_GET_FPU: {
904 struct kvm_fpu fpu;
905
906 memset(&fpu, 0, sizeof fpu);
Hollis Blanchardd0752062007-10-31 17:24:25 -0500907 r = kvm_arch_vcpu_ioctl_get_fpu(vcpu, &fpu);
Avi Kivityb8836732007-04-01 16:34:31 +0300908 if (r)
909 goto out;
910 r = -EFAULT;
911 if (copy_to_user(argp, &fpu, sizeof fpu))
912 goto out;
913 r = 0;
914 break;
915 }
916 case KVM_SET_FPU: {
917 struct kvm_fpu fpu;
918
919 r = -EFAULT;
920 if (copy_from_user(&fpu, argp, sizeof fpu))
921 goto out;
Hollis Blanchardd0752062007-10-31 17:24:25 -0500922 r = kvm_arch_vcpu_ioctl_set_fpu(vcpu, &fpu);
Avi Kivityb8836732007-04-01 16:34:31 +0300923 if (r)
924 goto out;
925 r = 0;
926 break;
927 }
Avi Kivitybccf2152007-02-21 18:04:26 +0200928 default:
Carsten Otte313a3dc2007-10-11 19:16:52 +0200929 r = kvm_arch_vcpu_ioctl(filp, ioctl, arg);
Avi Kivitybccf2152007-02-21 18:04:26 +0200930 }
931out:
932 return r;
933}
934
935static long kvm_vm_ioctl(struct file *filp,
936 unsigned int ioctl, unsigned long arg)
937{
938 struct kvm *kvm = filp->private_data;
939 void __user *argp = (void __user *)arg;
Carsten Otte1fe779f2007-10-29 16:08:35 +0100940 int r;
Avi Kivitybccf2152007-02-21 18:04:26 +0200941
Avi Kivity6d4e4c42007-11-21 16:41:05 +0200942 if (kvm->mm != current->mm)
943 return -EIO;
Avi Kivitybccf2152007-02-21 18:04:26 +0200944 switch (ioctl) {
945 case KVM_CREATE_VCPU:
946 r = kvm_vm_ioctl_create_vcpu(kvm, arg);
947 if (r < 0)
948 goto out;
949 break;
Izik Eidus6fc138d2007-10-09 19:20:39 +0200950 case KVM_SET_USER_MEMORY_REGION: {
951 struct kvm_userspace_memory_region kvm_userspace_mem;
952
953 r = -EFAULT;
954 if (copy_from_user(&kvm_userspace_mem, argp,
955 sizeof kvm_userspace_mem))
956 goto out;
957
958 r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 1);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800959 if (r)
960 goto out;
961 break;
962 }
963 case KVM_GET_DIRTY_LOG: {
964 struct kvm_dirty_log log;
965
966 r = -EFAULT;
Al Viro2f366982007-02-09 16:38:35 +0000967 if (copy_from_user(&log, argp, sizeof log))
Avi Kivity6aa8b732006-12-10 02:21:36 -0800968 goto out;
Avi Kivity2c6f5df2007-02-20 18:27:58 +0200969 r = kvm_vm_ioctl_get_dirty_log(kvm, &log);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800970 if (r)
971 goto out;
972 break;
973 }
Avi Kivityf17abe92007-02-21 19:28:04 +0200974 default:
Carsten Otte1fe779f2007-10-29 16:08:35 +0100975 r = kvm_arch_vm_ioctl(filp, ioctl, arg);
Avi Kivityf17abe92007-02-21 19:28:04 +0200976 }
977out:
978 return r;
979}
980
npiggin@suse.dee4a533a2007-12-05 18:15:52 +1100981static int kvm_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)
Avi Kivityf17abe92007-02-21 19:28:04 +0200982{
983 struct kvm *kvm = vma->vm_file->private_data;
Avi Kivityf17abe92007-02-21 19:28:04 +0200984 struct page *page;
985
npiggin@suse.dee4a533a2007-12-05 18:15:52 +1100986 if (!kvm_is_visible_gfn(kvm, vmf->pgoff))
987 return VM_FAULT_SIGBUS;
Marcelo Tosatti10589a42007-12-20 19:18:22 -0500988 page = gfn_to_page(kvm, vmf->pgoff);
Izik Eidus8a7ae052007-10-18 11:09:33 +0200989 if (is_error_page(page)) {
Izik Eidusb4231d62007-11-20 11:49:33 +0200990 kvm_release_page_clean(page);
npiggin@suse.dee4a533a2007-12-05 18:15:52 +1100991 return VM_FAULT_SIGBUS;
Izik Eidus8a7ae052007-10-18 11:09:33 +0200992 }
npiggin@suse.dee4a533a2007-12-05 18:15:52 +1100993 vmf->page = page;
994 return 0;
Avi Kivityf17abe92007-02-21 19:28:04 +0200995}
996
997static struct vm_operations_struct kvm_vm_vm_ops = {
npiggin@suse.dee4a533a2007-12-05 18:15:52 +1100998 .fault = kvm_vm_fault,
Avi Kivityf17abe92007-02-21 19:28:04 +0200999};
1000
1001static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma)
1002{
1003 vma->vm_ops = &kvm_vm_vm_ops;
1004 return 0;
1005}
1006
1007static struct file_operations kvm_vm_fops = {
1008 .release = kvm_vm_release,
1009 .unlocked_ioctl = kvm_vm_ioctl,
1010 .compat_ioctl = kvm_vm_ioctl,
1011 .mmap = kvm_vm_mmap,
1012};
1013
1014static int kvm_dev_ioctl_create_vm(void)
1015{
1016 int fd, r;
1017 struct inode *inode;
1018 struct file *file;
1019 struct kvm *kvm;
1020
Avi Kivityf17abe92007-02-21 19:28:04 +02001021 kvm = kvm_create_vm();
Avi Kivityd6d28162007-06-28 08:38:16 -04001022 if (IS_ERR(kvm))
1023 return PTR_ERR(kvm);
1024 r = anon_inode_getfd(&fd, &inode, &file, "kvm-vm", &kvm_vm_fops, kvm);
1025 if (r) {
1026 kvm_destroy_vm(kvm);
1027 return r;
Avi Kivityf17abe92007-02-21 19:28:04 +02001028 }
1029
Avi Kivitybccf2152007-02-21 18:04:26 +02001030 kvm->filp = file;
Avi Kivityf17abe92007-02-21 19:28:04 +02001031
Avi Kivityf17abe92007-02-21 19:28:04 +02001032 return fd;
Avi Kivityf17abe92007-02-21 19:28:04 +02001033}
1034
1035static long kvm_dev_ioctl(struct file *filp,
1036 unsigned int ioctl, unsigned long arg)
1037{
1038 void __user *argp = (void __user *)arg;
Avi Kivity07c45a32007-03-07 13:05:38 +02001039 long r = -EINVAL;
Avi Kivityf17abe92007-02-21 19:28:04 +02001040
1041 switch (ioctl) {
1042 case KVM_GET_API_VERSION:
Avi Kivityf0fe5102007-03-07 13:11:17 +02001043 r = -EINVAL;
1044 if (arg)
1045 goto out;
Avi Kivityf17abe92007-02-21 19:28:04 +02001046 r = KVM_API_VERSION;
1047 break;
1048 case KVM_CREATE_VM:
Avi Kivityf0fe5102007-03-07 13:11:17 +02001049 r = -EINVAL;
1050 if (arg)
1051 goto out;
Avi Kivityf17abe92007-02-21 19:28:04 +02001052 r = kvm_dev_ioctl_create_vm();
1053 break;
Zhang Xiantao018d00d2007-11-15 23:07:47 +08001054 case KVM_CHECK_EXTENSION:
1055 r = kvm_dev_ioctl_check_extension((long)argp);
Avi Kivity5d308f42007-03-01 17:56:20 +02001056 break;
Avi Kivity07c45a32007-03-07 13:05:38 +02001057 case KVM_GET_VCPU_MMAP_SIZE:
1058 r = -EINVAL;
1059 if (arg)
1060 goto out;
Avi Kivity039576c2007-03-20 12:46:50 +02001061 r = 2 * PAGE_SIZE;
Avi Kivity07c45a32007-03-07 13:05:38 +02001062 break;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001063 default:
Carsten Otte043405e2007-10-10 17:16:19 +02001064 return kvm_arch_dev_ioctl(filp, ioctl, arg);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001065 }
1066out:
1067 return r;
1068}
1069
Avi Kivity6aa8b732006-12-10 02:21:36 -08001070static struct file_operations kvm_chardev_ops = {
Avi Kivity6aa8b732006-12-10 02:21:36 -08001071 .unlocked_ioctl = kvm_dev_ioctl,
1072 .compat_ioctl = kvm_dev_ioctl,
Avi Kivity6aa8b732006-12-10 02:21:36 -08001073};
1074
1075static struct miscdevice kvm_dev = {
Avi Kivitybbe44322007-03-04 13:27:36 +02001076 KVM_MINOR,
Avi Kivity6aa8b732006-12-10 02:21:36 -08001077 "kvm",
1078 &kvm_chardev_ops,
1079};
1080
Avi Kivity1b6c0162007-05-24 13:03:52 +03001081static void hardware_enable(void *junk)
1082{
1083 int cpu = raw_smp_processor_id();
1084
1085 if (cpu_isset(cpu, cpus_hardware_enabled))
1086 return;
1087 cpu_set(cpu, cpus_hardware_enabled);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08001088 kvm_arch_hardware_enable(NULL);
Avi Kivity1b6c0162007-05-24 13:03:52 +03001089}
1090
1091static void hardware_disable(void *junk)
1092{
1093 int cpu = raw_smp_processor_id();
1094
1095 if (!cpu_isset(cpu, cpus_hardware_enabled))
1096 return;
1097 cpu_clear(cpu, cpus_hardware_enabled);
1098 decache_vcpus_on_cpu(cpu);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08001099 kvm_arch_hardware_disable(NULL);
Avi Kivity1b6c0162007-05-24 13:03:52 +03001100}
1101
Avi Kivity774c47f2007-02-12 00:54:47 -08001102static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val,
1103 void *v)
1104{
1105 int cpu = (long)v;
1106
Avi Kivity1a6f4d72007-11-11 18:37:32 +02001107 val &= ~CPU_TASKS_FROZEN;
Avi Kivity774c47f2007-02-12 00:54:47 -08001108 switch (val) {
Avi Kivitycec9ad22007-05-24 13:11:41 +03001109 case CPU_DYING:
Avi Kivity6ec8a852007-08-19 15:57:26 +03001110 printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",
1111 cpu);
1112 hardware_disable(NULL);
1113 break;
Avi Kivity774c47f2007-02-12 00:54:47 -08001114 case CPU_UP_CANCELED:
Jeremy Katz43934a32007-02-19 14:37:46 +02001115 printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n",
1116 cpu);
Avi Kivity1b6c0162007-05-24 13:03:52 +03001117 smp_call_function_single(cpu, hardware_disable, NULL, 0, 1);
Avi Kivity774c47f2007-02-12 00:54:47 -08001118 break;
Jeremy Katz43934a32007-02-19 14:37:46 +02001119 case CPU_ONLINE:
1120 printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n",
1121 cpu);
Avi Kivity1b6c0162007-05-24 13:03:52 +03001122 smp_call_function_single(cpu, hardware_enable, NULL, 0, 1);
Avi Kivity774c47f2007-02-12 00:54:47 -08001123 break;
1124 }
1125 return NOTIFY_OK;
1126}
1127
Rusty Russell9a2b85c2007-07-17 23:17:55 +10001128static int kvm_reboot(struct notifier_block *notifier, unsigned long val,
Mike Dayd77c26f2007-10-08 09:02:08 -04001129 void *v)
Rusty Russell9a2b85c2007-07-17 23:17:55 +10001130{
1131 if (val == SYS_RESTART) {
1132 /*
1133 * Some (well, at least mine) BIOSes hang on reboot if
1134 * in vmx root mode.
1135 */
1136 printk(KERN_INFO "kvm: exiting hardware virtualization\n");
1137 on_each_cpu(hardware_disable, NULL, 0, 1);
1138 }
1139 return NOTIFY_OK;
1140}
1141
1142static struct notifier_block kvm_reboot_notifier = {
1143 .notifier_call = kvm_reboot,
1144 .priority = 0,
1145};
1146
Gregory Haskins2eeb2e92007-05-31 14:08:53 -04001147void kvm_io_bus_init(struct kvm_io_bus *bus)
1148{
1149 memset(bus, 0, sizeof(*bus));
1150}
1151
1152void kvm_io_bus_destroy(struct kvm_io_bus *bus)
1153{
1154 int i;
1155
1156 for (i = 0; i < bus->dev_count; i++) {
1157 struct kvm_io_device *pos = bus->devs[i];
1158
1159 kvm_iodevice_destructor(pos);
1160 }
1161}
1162
1163struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr)
1164{
1165 int i;
1166
1167 for (i = 0; i < bus->dev_count; i++) {
1168 struct kvm_io_device *pos = bus->devs[i];
1169
1170 if (pos->in_range(pos, addr))
1171 return pos;
1172 }
1173
1174 return NULL;
1175}
1176
1177void kvm_io_bus_register_dev(struct kvm_io_bus *bus, struct kvm_io_device *dev)
1178{
1179 BUG_ON(bus->dev_count > (NR_IOBUS_DEVS-1));
1180
1181 bus->devs[bus->dev_count++] = dev;
1182}
1183
Avi Kivity774c47f2007-02-12 00:54:47 -08001184static struct notifier_block kvm_cpu_notifier = {
1185 .notifier_call = kvm_cpu_hotplug,
1186 .priority = 20, /* must be > scheduler priority */
1187};
1188
Avi Kivityba1389b2007-11-18 16:24:12 +02001189static u64 vm_stat_get(void *_offset)
1190{
1191 unsigned offset = (long)_offset;
1192 u64 total = 0;
1193 struct kvm *kvm;
1194
1195 spin_lock(&kvm_lock);
1196 list_for_each_entry(kvm, &vm_list, vm_list)
1197 total += *(u32 *)((void *)kvm + offset);
1198 spin_unlock(&kvm_lock);
1199 return total;
1200}
1201
1202DEFINE_SIMPLE_ATTRIBUTE(vm_stat_fops, vm_stat_get, NULL, "%llu\n");
1203
1204static u64 vcpu_stat_get(void *_offset)
Avi Kivity1165f5f2007-04-19 17:27:43 +03001205{
1206 unsigned offset = (long)_offset;
1207 u64 total = 0;
1208 struct kvm *kvm;
1209 struct kvm_vcpu *vcpu;
1210 int i;
1211
1212 spin_lock(&kvm_lock);
1213 list_for_each_entry(kvm, &vm_list, vm_list)
1214 for (i = 0; i < KVM_MAX_VCPUS; ++i) {
Rusty Russellfb3f0f52007-07-27 17:16:56 +10001215 vcpu = kvm->vcpus[i];
1216 if (vcpu)
1217 total += *(u32 *)((void *)vcpu + offset);
Avi Kivity1165f5f2007-04-19 17:27:43 +03001218 }
1219 spin_unlock(&kvm_lock);
1220 return total;
1221}
1222
Avi Kivityba1389b2007-11-18 16:24:12 +02001223DEFINE_SIMPLE_ATTRIBUTE(vcpu_stat_fops, vcpu_stat_get, NULL, "%llu\n");
1224
1225static struct file_operations *stat_fops[] = {
1226 [KVM_STAT_VCPU] = &vcpu_stat_fops,
1227 [KVM_STAT_VM] = &vm_stat_fops,
1228};
Avi Kivity1165f5f2007-04-19 17:27:43 +03001229
Zhang Xiantaoa16b0432007-11-16 14:38:21 +08001230static void kvm_init_debug(void)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001231{
1232 struct kvm_stats_debugfs_item *p;
1233
Al Viro8b6d44c2007-02-09 16:38:40 +00001234 debugfs_dir = debugfs_create_dir("kvm", NULL);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001235 for (p = debugfs_entries; p->name; ++p)
Avi Kivity1165f5f2007-04-19 17:27:43 +03001236 p->dentry = debugfs_create_file(p->name, 0444, debugfs_dir,
1237 (void *)(long)p->offset,
Avi Kivityba1389b2007-11-18 16:24:12 +02001238 stat_fops[p->kind]);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001239}
1240
1241static void kvm_exit_debug(void)
1242{
1243 struct kvm_stats_debugfs_item *p;
1244
1245 for (p = debugfs_entries; p->name; ++p)
1246 debugfs_remove(p->dentry);
1247 debugfs_remove(debugfs_dir);
1248}
1249
Avi Kivity59ae6c62007-02-12 00:54:48 -08001250static int kvm_suspend(struct sys_device *dev, pm_message_t state)
1251{
Avi Kivity4267c412007-05-24 13:09:41 +03001252 hardware_disable(NULL);
Avi Kivity59ae6c62007-02-12 00:54:48 -08001253 return 0;
1254}
1255
1256static int kvm_resume(struct sys_device *dev)
1257{
Avi Kivity4267c412007-05-24 13:09:41 +03001258 hardware_enable(NULL);
Avi Kivity59ae6c62007-02-12 00:54:48 -08001259 return 0;
1260}
1261
1262static struct sysdev_class kvm_sysdev_class = {
Kay Sieversaf5ca3f2007-12-20 02:09:39 +01001263 .name = "kvm",
Avi Kivity59ae6c62007-02-12 00:54:48 -08001264 .suspend = kvm_suspend,
1265 .resume = kvm_resume,
1266};
1267
1268static struct sys_device kvm_sysdev = {
1269 .id = 0,
1270 .cls = &kvm_sysdev_class,
1271};
1272
Izik Eiduscea7bb22007-10-17 19:17:48 +02001273struct page *bad_page;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001274
Avi Kivity15ad7142007-07-11 18:17:21 +03001275static inline
1276struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn)
1277{
1278 return container_of(pn, struct kvm_vcpu, preempt_notifier);
1279}
1280
1281static void kvm_sched_in(struct preempt_notifier *pn, int cpu)
1282{
1283 struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn);
1284
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08001285 kvm_arch_vcpu_load(vcpu, cpu);
Avi Kivity15ad7142007-07-11 18:17:21 +03001286}
1287
1288static void kvm_sched_out(struct preempt_notifier *pn,
1289 struct task_struct *next)
1290{
1291 struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn);
1292
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08001293 kvm_arch_vcpu_put(vcpu);
Avi Kivity15ad7142007-07-11 18:17:21 +03001294}
1295
Zhang Xiantaof8c16bb2007-11-14 20:40:21 +08001296int kvm_init(void *opaque, unsigned int vcpu_size,
Rusty Russellc16f8622007-07-30 21:12:19 +10001297 struct module *module)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001298{
1299 int r;
Yang, Sheng002c7f72007-07-31 14:23:01 +03001300 int cpu;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001301
Zhang Xiantaocb498ea2007-11-14 20:39:31 +08001302 kvm_init_debug();
1303
Zhang Xiantaof8c16bb2007-11-14 20:40:21 +08001304 r = kvm_arch_init(opaque);
1305 if (r)
Zhang Xiantaod23087842007-11-29 15:35:39 +08001306 goto out_fail;
Zhang Xiantaocb498ea2007-11-14 20:39:31 +08001307
1308 bad_page = alloc_page(GFP_KERNEL | __GFP_ZERO);
1309
1310 if (bad_page == NULL) {
1311 r = -ENOMEM;
1312 goto out;
1313 }
1314
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08001315 r = kvm_arch_hardware_setup();
Avi Kivity6aa8b732006-12-10 02:21:36 -08001316 if (r < 0)
Zhang Xiantaod23087842007-11-29 15:35:39 +08001317 goto out_free_0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001318
Yang, Sheng002c7f72007-07-31 14:23:01 +03001319 for_each_online_cpu(cpu) {
1320 smp_call_function_single(cpu,
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08001321 kvm_arch_check_processor_compat,
Yang, Sheng002c7f72007-07-31 14:23:01 +03001322 &r, 0, 1);
1323 if (r < 0)
Zhang Xiantaod23087842007-11-29 15:35:39 +08001324 goto out_free_1;
Yang, Sheng002c7f72007-07-31 14:23:01 +03001325 }
1326
Avi Kivity1b6c0162007-05-24 13:03:52 +03001327 on_each_cpu(hardware_enable, NULL, 0, 1);
Avi Kivity774c47f2007-02-12 00:54:47 -08001328 r = register_cpu_notifier(&kvm_cpu_notifier);
1329 if (r)
Zhang Xiantaod23087842007-11-29 15:35:39 +08001330 goto out_free_2;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001331 register_reboot_notifier(&kvm_reboot_notifier);
1332
Avi Kivity59ae6c62007-02-12 00:54:48 -08001333 r = sysdev_class_register(&kvm_sysdev_class);
1334 if (r)
Zhang Xiantaod23087842007-11-29 15:35:39 +08001335 goto out_free_3;
Avi Kivity59ae6c62007-02-12 00:54:48 -08001336
1337 r = sysdev_register(&kvm_sysdev);
1338 if (r)
Zhang Xiantaod23087842007-11-29 15:35:39 +08001339 goto out_free_4;
Avi Kivity59ae6c62007-02-12 00:54:48 -08001340
Rusty Russellc16f8622007-07-30 21:12:19 +10001341 /* A kmem cache lets us meet the alignment requirements of fx_save. */
1342 kvm_vcpu_cache = kmem_cache_create("kvm_vcpu", vcpu_size,
Joe Perches56919c52007-11-12 20:06:51 -08001343 __alignof__(struct kvm_vcpu),
1344 0, NULL);
Rusty Russellc16f8622007-07-30 21:12:19 +10001345 if (!kvm_vcpu_cache) {
1346 r = -ENOMEM;
Zhang Xiantaod23087842007-11-29 15:35:39 +08001347 goto out_free_5;
Rusty Russellc16f8622007-07-30 21:12:19 +10001348 }
1349
Avi Kivity6aa8b732006-12-10 02:21:36 -08001350 kvm_chardev_ops.owner = module;
1351
1352 r = misc_register(&kvm_dev);
1353 if (r) {
Mike Dayd77c26f2007-10-08 09:02:08 -04001354 printk(KERN_ERR "kvm: misc device register failed\n");
Avi Kivity6aa8b732006-12-10 02:21:36 -08001355 goto out_free;
1356 }
1357
Avi Kivity15ad7142007-07-11 18:17:21 +03001358 kvm_preempt_ops.sched_in = kvm_sched_in;
1359 kvm_preempt_ops.sched_out = kvm_sched_out;
1360
Avi Kivityc7addb92007-09-16 18:58:32 +02001361 return 0;
Avi Kivity6aa8b732006-12-10 02:21:36 -08001362
1363out_free:
Rusty Russellc16f8622007-07-30 21:12:19 +10001364 kmem_cache_destroy(kvm_vcpu_cache);
Zhang Xiantaod23087842007-11-29 15:35:39 +08001365out_free_5:
Avi Kivity59ae6c62007-02-12 00:54:48 -08001366 sysdev_unregister(&kvm_sysdev);
Zhang Xiantaod23087842007-11-29 15:35:39 +08001367out_free_4:
Avi Kivity59ae6c62007-02-12 00:54:48 -08001368 sysdev_class_unregister(&kvm_sysdev_class);
Zhang Xiantaod23087842007-11-29 15:35:39 +08001369out_free_3:
Avi Kivity6aa8b732006-12-10 02:21:36 -08001370 unregister_reboot_notifier(&kvm_reboot_notifier);
Avi Kivity774c47f2007-02-12 00:54:47 -08001371 unregister_cpu_notifier(&kvm_cpu_notifier);
Zhang Xiantaod23087842007-11-29 15:35:39 +08001372out_free_2:
Avi Kivity1b6c0162007-05-24 13:03:52 +03001373 on_each_cpu(hardware_disable, NULL, 0, 1);
Zhang Xiantaod23087842007-11-29 15:35:39 +08001374out_free_1:
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08001375 kvm_arch_hardware_unsetup();
Zhang Xiantaod23087842007-11-29 15:35:39 +08001376out_free_0:
1377 __free_page(bad_page);
Avi Kivityca45aaa2007-03-01 19:21:03 +02001378out:
Zhang Xiantaof8c16bb2007-11-14 20:40:21 +08001379 kvm_arch_exit();
Zhang Xiantaocb498ea2007-11-14 20:39:31 +08001380 kvm_exit_debug();
Zhang Xiantaod23087842007-11-29 15:35:39 +08001381out_fail:
Avi Kivity6aa8b732006-12-10 02:21:36 -08001382 return r;
1383}
Zhang Xiantaocb498ea2007-11-14 20:39:31 +08001384EXPORT_SYMBOL_GPL(kvm_init);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001385
Zhang Xiantaocb498ea2007-11-14 20:39:31 +08001386void kvm_exit(void)
Avi Kivity6aa8b732006-12-10 02:21:36 -08001387{
1388 misc_deregister(&kvm_dev);
Rusty Russellc16f8622007-07-30 21:12:19 +10001389 kmem_cache_destroy(kvm_vcpu_cache);
Avi Kivity59ae6c62007-02-12 00:54:48 -08001390 sysdev_unregister(&kvm_sysdev);
1391 sysdev_class_unregister(&kvm_sysdev_class);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001392 unregister_reboot_notifier(&kvm_reboot_notifier);
Avi Kivity59ae6c62007-02-12 00:54:48 -08001393 unregister_cpu_notifier(&kvm_cpu_notifier);
Avi Kivity1b6c0162007-05-24 13:03:52 +03001394 on_each_cpu(hardware_disable, NULL, 0, 1);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +08001395 kvm_arch_hardware_unsetup();
Zhang Xiantaof8c16bb2007-11-14 20:40:21 +08001396 kvm_arch_exit();
Avi Kivity6aa8b732006-12-10 02:21:36 -08001397 kvm_exit_debug();
Izik Eiduscea7bb22007-10-17 19:17:48 +02001398 __free_page(bad_page);
Avi Kivity6aa8b732006-12-10 02:21:36 -08001399}
Zhang Xiantaocb498ea2007-11-14 20:39:31 +08001400EXPORT_SYMBOL_GPL(kvm_exit);