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Avi Kivityedf88412007-12-16 11:02:48 +02001#ifndef __KVM_HOST_H
2#define __KVM_HOST_H
Avi Kivity6aa8b732006-12-10 02:21:36 -08003
4/*
5 * This work is licensed under the terms of the GNU GPL, version 2. See
6 * the COPYING file in the top-level directory.
7 */
8
9#include <linux/types.h>
Christian Borntraegere56a7a22007-10-18 14:39:10 +020010#include <linux/hardirq.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080011#include <linux/list.h>
12#include <linux/mutex.h>
13#include <linux/spinlock.h>
Markus Rechberger06ff0d32007-05-27 10:46:52 +030014#include <linux/signal.h>
15#include <linux/sched.h>
Paul Gortmaker187f1882011-11-23 20:12:59 -050016#include <linux/bug.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080017#include <linux/mm.h>
Eric B Munsonb297e672011-10-10 11:46:15 -040018#include <linux/mmu_notifier.h>
Avi Kivity15ad7142007-07-11 18:17:21 +030019#include <linux/preempt.h>
Sheng Yang0937c482008-11-24 14:32:53 +080020#include <linux/msi.h>
Jan Kiszkad89f5ef2010-11-09 17:02:49 +010021#include <linux/slab.h>
Michael S. Tsirkinbd2b53b2010-11-18 19:09:08 +020022#include <linux/rcupdate.h>
Jan Kiszkabd801582011-09-12 11:26:22 +020023#include <linux/ratelimit.h>
Xiao Guangrong83f09222012-08-03 15:39:59 +080024#include <linux/err.h>
Alexey Dobriyane8edc6e2007-05-21 01:22:52 +040025#include <asm/signal.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080026
Avi Kivity6aa8b732006-12-10 02:21:36 -080027#include <linux/kvm.h>
Ingo Molnar102d8322007-02-19 14:37:47 +020028#include <linux/kvm_para.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080029
Avi Kivityedf88412007-12-16 11:02:48 +020030#include <linux/kvm_types.h>
Hollis Blanchardd77a39d2007-12-03 15:30:23 -060031
Avi Kivityedf88412007-12-16 11:02:48 +020032#include <asm/kvm_host.h>
Zhang Xiantaod657a982007-12-14 09:41:22 +080033
Avi Kivitycef4dea2010-01-20 12:01:20 +020034#ifndef KVM_MMIO_SIZE
35#define KVM_MMIO_SIZE 8
36#endif
37
Avi Kivity6aa8b732006-12-10 02:21:36 -080038/*
Xiao Guangrong67b29202012-08-21 10:58:45 +080039 * The bit 16 ~ bit 31 of kvm_memory_region::flags are internally used
40 * in kvm, other bits are visible for userspace which are defined in
41 * include/linux/kvm_h.
42 */
43#define KVM_MEMSLOT_INVALID (1UL << 16)
44
45/*
Avi Kivityf78146b2012-04-18 19:22:47 +030046 * If we support unaligned MMIO, at most one fragment will be split into two:
47 */
48#ifdef KVM_UNALIGNED_MMIO
49# define KVM_EXTRA_MMIO_FRAGMENTS 1
50#else
51# define KVM_EXTRA_MMIO_FRAGMENTS 0
52#endif
53
54#define KVM_USER_MMIO_SIZE 8
55
56#define KVM_MAX_MMIO_FRAGMENTS \
57 (KVM_MMIO_SIZE / KVM_USER_MMIO_SIZE + KVM_EXTRA_MMIO_FRAGMENTS)
58
59/*
Xiao Guangrong9c5b1172012-08-03 15:43:51 +080060 * For the normal pfn, the highest 12 bits should be zero,
61 * so we can mask these bits to indicate the error.
62 */
63#define KVM_PFN_ERR_MASK (0xfffULL << 52)
Xiao Guangrong6c8ee572012-08-03 15:37:54 +080064
Xiao Guangrong9c5b1172012-08-03 15:43:51 +080065#define KVM_PFN_ERR_FAULT (KVM_PFN_ERR_MASK)
66#define KVM_PFN_ERR_HWPOISON (KVM_PFN_ERR_MASK + 1)
67#define KVM_PFN_ERR_BAD (KVM_PFN_ERR_MASK + 2)
Xiao Guangrong69552c22012-08-21 11:01:19 +080068#define KVM_PFN_ERR_RO_FAULT (KVM_PFN_ERR_MASK + 3)
Xiao Guangrong9c5b1172012-08-03 15:43:51 +080069
70static inline bool is_error_pfn(pfn_t pfn)
Xiao Guangrong83f09222012-08-03 15:39:59 +080071{
Xiao Guangrong9c5b1172012-08-03 15:43:51 +080072 return !!(pfn & KVM_PFN_ERR_MASK);
Xiao Guangrong83f09222012-08-03 15:39:59 +080073}
74
Xiao Guangrong9c5b1172012-08-03 15:43:51 +080075static inline bool is_noslot_pfn(pfn_t pfn)
Xiao Guangrong83f09222012-08-03 15:39:59 +080076{
Xiao Guangrong9c5b1172012-08-03 15:43:51 +080077 return pfn == KVM_PFN_ERR_BAD;
Xiao Guangrong83f09222012-08-03 15:39:59 +080078}
79
Xiao Guangrong9c5b1172012-08-03 15:43:51 +080080static inline bool is_invalid_pfn(pfn_t pfn)
Xiao Guangrong83f09222012-08-03 15:39:59 +080081{
82 return !is_noslot_pfn(pfn) && is_error_pfn(pfn);
83}
84
Xiao Guangrong7068d092012-08-21 11:02:22 +080085#define KVM_HVA_ERR_BAD (PAGE_OFFSET)
86#define KVM_HVA_ERR_RO_BAD (PAGE_OFFSET + PAGE_SIZE)
Xiao Guangrongca3a4902012-08-21 11:01:50 +080087
88static inline bool kvm_is_error_hva(unsigned long addr)
89{
Xiao Guangrong7068d092012-08-21 11:02:22 +080090 return addr >= PAGE_OFFSET;
Xiao Guangrongca3a4902012-08-21 11:01:50 +080091}
92
Xiao Guangrong6cede2e2012-08-03 15:41:22 +080093#define KVM_ERR_PTR_BAD_PAGE (ERR_PTR(-ENOENT))
94
Xiao Guangrong9c5b1172012-08-03 15:43:51 +080095static inline bool is_error_page(struct page *page)
Xiao Guangrong6cede2e2012-08-03 15:41:22 +080096{
97 return IS_ERR(page);
98}
99
Avi Kivity6aa8b732006-12-10 02:21:36 -0800100/*
Avi Kivityd9e368d2007-06-07 19:18:30 +0300101 * vcpu->requests bit members
102 */
Avi Kivity3176bc32007-10-16 17:22:08 +0200103#define KVM_REQ_TLB_FLUSH 0
Avi Kivity2f52d582008-01-16 12:49:30 +0200104#define KVM_REQ_MIGRATE_TIMER 1
Avi Kivityb209749f2007-10-22 16:50:39 +0200105#define KVM_REQ_REPORT_TPR_ACCESS 2
Marcelo Tosatti2e53d632008-02-20 14:47:24 -0500106#define KVM_REQ_MMU_RELOAD 3
Joerg Roedel71c4dfa2008-02-26 16:49:16 +0100107#define KVM_REQ_TRIPLE_FAULT 4
Marcelo Tosatti06e05642008-06-06 16:37:36 -0300108#define KVM_REQ_PENDING_TIMER 5
Marcelo Tosattid7690172008-09-08 15:23:48 -0300109#define KVM_REQ_UNHALT 6
Marcelo Tosatti4731d4c2008-09-23 13:18:39 -0300110#define KVM_REQ_MMU_SYNC 7
Zachary Amsden34c238a2010-09-18 14:38:14 -1000111#define KVM_REQ_CLOCK_UPDATE 8
Marcelo Tosatti32f88402009-05-07 17:55:12 -0300112#define KVM_REQ_KICK 9
Avi Kivity02daab22009-12-30 12:40:26 +0200113#define KVM_REQ_DEACTIVATE_FPU 10
Avi Kivity3842d132010-07-27 12:30:24 +0300114#define KVM_REQ_EVENT 11
Gleb Natapovaf585b92010-10-14 11:22:46 +0200115#define KVM_REQ_APF_HALT 12
Glauber Costac9aaa892011-07-11 15:28:14 -0400116#define KVM_REQ_STEAL_UPDATE 13
Avi Kivity7460fb4a2011-09-20 13:43:14 +0300117#define KVM_REQ_NMI 14
Nadav Har'Eld6185f22011-09-22 13:52:56 +0300118#define KVM_REQ_IMMEDIATE_EXIT 15
Gleb Natapovf5132b02011-11-10 14:57:22 +0200119#define KVM_REQ_PMU 16
120#define KVM_REQ_PMI 17
Avi Kivity6aa8b732006-12-10 02:21:36 -0800121
Alex Williamson7a844282012-09-21 11:58:03 -0600122#define KVM_USERSPACE_IRQ_SOURCE_ID 0
123#define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
Sheng Yang5550af42008-10-15 20:15:06 +0800124
Michael S. Tsirkin6c474692009-06-29 22:24:26 +0300125struct kvm;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800126struct kvm_vcpu;
Rusty Russellc16f8622007-07-30 21:12:19 +1000127extern struct kmem_cache *kvm_vcpu_cache;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800128
Sasha Levin743eeb02011-07-27 16:00:48 +0300129struct kvm_io_range {
130 gpa_t addr;
131 int len;
132 struct kvm_io_device *dev;
133};
134
Amos Kong786a9f82012-03-09 12:17:40 +0800135#define NR_IOBUS_DEVS 1000
Amos Konga13007162012-03-09 12:17:32 +0800136
Gregory Haskins2eeb2e92007-05-31 14:08:53 -0400137struct kvm_io_bus {
138 int dev_count;
Amos Konga13007162012-03-09 12:17:32 +0800139 struct kvm_io_range range[];
Gregory Haskins2eeb2e92007-05-31 14:08:53 -0400140};
141
Marcelo Tosattie93f8a02009-12-23 14:35:24 -0200142enum kvm_bus {
143 KVM_MMIO_BUS,
144 KVM_PIO_BUS,
145 KVM_NR_BUSES
146};
147
148int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
149 int len, const void *val);
150int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, int len,
Michael S. Tsirkinbda90202009-06-29 22:24:32 +0300151 void *val);
Sasha Levin743eeb02011-07-27 16:00:48 +0300152int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
153 int len, struct kvm_io_device *dev);
Marcelo Tosattie93f8a02009-12-23 14:35:24 -0200154int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
155 struct kvm_io_device *dev);
Gregory Haskins2eeb2e92007-05-31 14:08:53 -0400156
Gleb Natapovaf585b92010-10-14 11:22:46 +0200157#ifdef CONFIG_KVM_ASYNC_PF
158struct kvm_async_pf {
159 struct work_struct work;
160 struct list_head link;
161 struct list_head queue;
162 struct kvm_vcpu *vcpu;
163 struct mm_struct *mm;
164 gva_t gva;
165 unsigned long addr;
166 struct kvm_arch_async_pf arch;
167 struct page *page;
168 bool done;
169};
170
171void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
172void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
173int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
174 struct kvm_arch_async_pf *arch);
Gleb Natapov344d9582010-10-14 11:22:50 +0200175int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
Gleb Natapovaf585b92010-10-14 11:22:46 +0200176#endif
177
Xiao Guangrong6b7e2d02011-01-12 15:40:31 +0800178enum {
179 OUTSIDE_GUEST_MODE,
180 IN_GUEST_MODE,
Avi Kivityc1427862012-05-14 15:44:06 +0300181 EXITING_GUEST_MODE,
182 READING_SHADOW_PAGE_TABLES,
Xiao Guangrong6b7e2d02011-01-12 15:40:31 +0800183};
184
Avi Kivityf78146b2012-04-18 19:22:47 +0300185/*
186 * Sometimes a large or cross-page mmio needs to be broken up into separate
187 * exits for userspace servicing.
188 */
189struct kvm_mmio_fragment {
190 gpa_t gpa;
191 void *data;
192 unsigned len;
193};
194
Zhang Xiantaod657a982007-12-14 09:41:22 +0800195struct kvm_vcpu {
Zhang Xiantaod17fbbf2007-12-14 09:45:31 +0800196 struct kvm *kvm;
Hollis Blanchard31bb1172008-01-28 17:42:34 -0600197#ifdef CONFIG_PREEMPT_NOTIFIERS
Zhang Xiantaod17fbbf2007-12-14 09:45:31 +0800198 struct preempt_notifier preempt_notifier;
Hollis Blanchard31bb1172008-01-28 17:42:34 -0600199#endif
Xiao Guangrong6b7e2d02011-01-12 15:40:31 +0800200 int cpu;
Zhang Xiantaod17fbbf2007-12-14 09:45:31 +0800201 int vcpu_id;
Xiao Guangrong6b7e2d02011-01-12 15:40:31 +0800202 int srcu_idx;
203 int mode;
Zhang Xiantaod17fbbf2007-12-14 09:45:31 +0800204 unsigned long requests;
Jan Kiszkad0bfb942008-12-15 13:52:10 +0100205 unsigned long guest_debug;
Xiao Guangrong6b7e2d02011-01-12 15:40:31 +0800206
207 struct mutex mutex;
208 struct kvm_run *run;
Marcelo Tosattif656ce02009-12-23 14:35:25 -0200209
Zhang Xiantaod17fbbf2007-12-14 09:45:31 +0800210 int fpu_active;
Dexuan Cui2acf9232010-06-10 11:27:12 +0800211 int guest_fpu_loaded, guest_xcr0_loaded;
Zhang Xiantaod17fbbf2007-12-14 09:45:31 +0800212 wait_queue_head_t wq;
Rik van Riel34bb10b2011-02-01 09:52:41 -0500213 struct pid *pid;
Zhang Xiantaod17fbbf2007-12-14 09:45:31 +0800214 int sigset_active;
215 sigset_t sigset;
216 struct kvm_vcpu_stat stat;
217
218#ifdef CONFIG_HAS_IOMEM
219 int mmio_needed;
220 int mmio_read_completed;
221 int mmio_is_write;
Avi Kivityf78146b2012-04-18 19:22:47 +0300222 int mmio_cur_fragment;
223 int mmio_nr_fragments;
224 struct kvm_mmio_fragment mmio_fragments[KVM_MAX_MMIO_FRAGMENTS];
Zhang Xiantaod17fbbf2007-12-14 09:45:31 +0800225#endif
Zhang Xiantaod657a982007-12-14 09:41:22 +0800226
Gleb Natapovaf585b92010-10-14 11:22:46 +0200227#ifdef CONFIG_KVM_ASYNC_PF
228 struct {
229 u32 queued;
230 struct list_head queue;
231 struct list_head done;
232 spinlock_t lock;
233 } async_pf;
234#endif
235
Raghavendra K T4c088492012-07-18 19:07:46 +0530236#ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
237 /*
238 * Cpu relax intercept or pause loop exit optimization
239 * in_spin_loop: set when a vcpu does a pause loop exit
240 * or cpu relax intercepted.
241 * dy_eligible: indicates whether vcpu is eligible for directed yield.
242 */
243 struct {
244 bool in_spin_loop;
245 bool dy_eligible;
246 } spin_loop;
247#endif
Zhang Xiantaod657a982007-12-14 09:41:22 +0800248 struct kvm_vcpu_arch arch;
249};
250
Xiao Guangrong6b7e2d02011-01-12 15:40:31 +0800251static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
252{
253 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
254}
255
Takuya Yoshikawa660c22c2010-04-13 22:47:24 +0900256/*
257 * Some of the bitops functions do not support too long bitmaps.
258 * This number must be determined not to exceed such limits.
259 */
260#define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
261
Avi Kivity6aa8b732006-12-10 02:21:36 -0800262struct kvm_memory_slot {
263 gfn_t base_gfn;
264 unsigned long npages;
265 unsigned long flags;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800266 unsigned long *dirty_bitmap;
Takuya Yoshikawadb3fe4e2012-02-08 13:02:18 +0900267 struct kvm_arch_memory_slot arch;
Izik Eidus8a7ae052007-10-18 11:09:33 +0200268 unsigned long userspace_addr;
Izik Eidus80b14b52007-10-25 11:54:04 +0200269 int user_alloc;
Avi Kivitye36d96f2010-06-21 10:56:36 +0300270 int id;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800271};
272
Takuya Yoshikawa87bf6e72010-04-12 19:35:35 +0900273static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
274{
275 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
276}
277
Avi Kivity399ec802008-11-19 13:58:46 +0200278struct kvm_kernel_irq_routing_entry {
279 u32 gsi;
Michael S. Tsirkin5116d8f2009-07-26 17:10:01 +0300280 u32 type;
Gleb Natapov49256632009-02-04 17:28:14 +0200281 int (*set)(struct kvm_kernel_irq_routing_entry *e,
Gleb Natapov1a6e4a82009-08-24 11:54:19 +0300282 struct kvm *kvm, int irq_source_id, int level);
Avi Kivity399ec802008-11-19 13:58:46 +0200283 union {
284 struct {
285 unsigned irqchip;
286 unsigned pin;
287 } irqchip;
Sheng Yang79950e12009-02-10 13:57:06 +0800288 struct msi_msg msi;
Avi Kivity399ec802008-11-19 13:58:46 +0200289 };
Gleb Natapov46e624b2009-08-24 11:54:20 +0300290 struct hlist_node link;
291};
292
Gleb Natapov3e71f882009-08-24 11:54:21 +0300293#ifdef __KVM_HAVE_IOAPIC
294
Gleb Natapov46e624b2009-08-24 11:54:20 +0300295struct kvm_irq_routing_table {
Gleb Natapov3e71f882009-08-24 11:54:21 +0300296 int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
Gleb Natapov46e624b2009-08-24 11:54:20 +0300297 struct kvm_kernel_irq_routing_entry *rt_entries;
298 u32 nr_rt_entries;
299 /*
300 * Array indexed by gsi. Each entry contains list of irq chips
301 * the gsi is connected to.
302 */
303 struct hlist_head map[0];
Avi Kivity399ec802008-11-19 13:58:46 +0200304};
305
Gleb Natapov3e71f882009-08-24 11:54:21 +0300306#else
307
308struct kvm_irq_routing_table {};
309
310#endif
311
Xiao Guangrong93a5cef2011-11-24 17:37:48 +0800312#ifndef KVM_MEM_SLOTS_NUM
313#define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
314#endif
315
Xiao Guangrongbf3e05b2011-11-24 17:40:57 +0800316/*
317 * Note:
318 * memslots are not sorted by id anymore, please use id_to_memslot()
319 * to get the memslot by its id.
320 */
Marcelo Tosatti46a26bf2009-12-23 14:35:16 -0200321struct kvm_memslots {
Gleb Natapov49c77542010-10-18 15:22:23 +0200322 u64 generation;
Xiao Guangrong93a5cef2011-11-24 17:37:48 +0800323 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
Xiao Guangrongf85e2cb2011-11-24 17:41:54 +0800324 /* The mapping table from slot id to the index in memslots[]. */
325 int id_to_index[KVM_MEM_SLOTS_NUM];
Marcelo Tosatti46a26bf2009-12-23 14:35:16 -0200326};
327
Avi Kivity6aa8b732006-12-10 02:21:36 -0800328struct kvm {
Marcelo Tosattiaaee2c92007-12-20 19:18:26 -0500329 spinlock_t mmu_lock;
Marcelo Tosatti79fac952009-12-23 14:35:26 -0200330 struct mutex slots_lock;
Avi Kivity6d4e4c42007-11-21 16:41:05 +0200331 struct mm_struct *mm; /* userspace tied to this vm */
Marcelo Tosatti46a26bf2009-12-23 14:35:16 -0200332 struct kvm_memslots *memslots;
Marcelo Tosattibc6678a2009-12-23 14:35:21 -0200333 struct srcu_struct srcu;
Gleb Natapov73880c82009-06-09 15:56:28 +0300334#ifdef CONFIG_KVM_APIC_ARCHITECTURE
335 u32 bsp_vcpu_id;
Gleb Natapov73880c82009-06-09 15:56:28 +0300336#endif
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000337 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
Gleb Natapov73880c82009-06-09 15:56:28 +0300338 atomic_t online_vcpus;
Rik van Riel217ece62011-02-01 09:53:28 -0500339 int last_boosted_vcpu;
Avi Kivity133de902007-02-12 00:54:44 -0800340 struct list_head vm_list;
Marcelo Tosatti60eead72009-06-04 15:08:23 -0300341 struct mutex lock;
Marcelo Tosattie93f8a02009-12-23 14:35:24 -0200342 struct kvm_io_bus *buses[KVM_NR_BUSES];
Gregory Haskins721eecb2009-05-20 10:30:49 -0400343#ifdef CONFIG_HAVE_KVM_EVENTFD
344 struct {
345 spinlock_t lock;
346 struct list_head items;
Alex Williamson7a844282012-09-21 11:58:03 -0600347 struct list_head resampler_list;
348 struct mutex resampler_lock;
Gregory Haskins721eecb2009-05-20 10:30:49 -0400349 } irqfds;
Gregory Haskinsd34e6b12009-07-07 17:08:49 -0400350 struct list_head ioeventfds;
Gregory Haskins721eecb2009-05-20 10:30:49 -0400351#endif
Avi Kivityba1389b2007-11-18 16:24:12 +0200352 struct kvm_vm_stat stat;
Zhang Xiantaod69fb812007-12-14 09:54:20 +0800353 struct kvm_arch arch;
Izik Eidusd39f13b2008-03-30 16:01:25 +0300354 atomic_t users_count;
Laurent Vivier5f94c172008-05-30 16:05:54 +0200355#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
Laurent Vivier5f94c172008-05-30 16:05:54 +0200356 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
Sasha Levin2b3c2462011-07-20 20:59:00 +0300357 spinlock_t ring_lock;
358 struct list_head coalesced_zones;
Laurent Vivier5f94c172008-05-30 16:05:54 +0200359#endif
Andrea Arcangelie930bff2008-07-25 16:24:52 +0200360
Marcelo Tosatti60eead72009-06-04 15:08:23 -0300361 struct mutex irq_lock;
Avi Kivity75858a82009-01-04 17:10:50 +0200362#ifdef CONFIG_HAVE_KVM_IRQCHIP
Michael S. Tsirkinbd2b53b2010-11-18 19:09:08 +0200363 /*
364 * Update side is protected by irq_lock and,
365 * if configured, irqfds.lock.
366 */
Arnd Bergmann4b6a2872010-03-04 15:59:23 +0100367 struct kvm_irq_routing_table __rcu *irq_routing;
Avi Kivity75858a82009-01-04 17:10:50 +0200368 struct hlist_head mask_notifier_list;
Gleb Natapov136bdfe2009-08-24 11:54:23 +0300369 struct hlist_head irq_ack_notifier_list;
Avi Kivity75858a82009-01-04 17:10:50 +0200370#endif
371
Marc Zyngier36c1ed82012-06-15 15:07:24 -0400372#if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
Andrea Arcangelie930bff2008-07-25 16:24:52 +0200373 struct mmu_notifier mmu_notifier;
374 unsigned long mmu_notifier_seq;
375 long mmu_notifier_count;
376#endif
Avi Kivity5c663a12010-12-08 18:04:51 +0200377 long tlbs_dirty;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800378};
379
Christoffer Dalla737f252012-06-03 21:17:48 +0300380#define kvm_err(fmt, ...) \
381 pr_err("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
382#define kvm_info(fmt, ...) \
383 pr_info("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
384#define kvm_debug(fmt, ...) \
385 pr_debug("kvm [%i]: " fmt, task_pid_nr(current), ## __VA_ARGS__)
386#define kvm_pr_unimpl(fmt, ...) \
387 pr_err_ratelimited("kvm [%i]: " fmt, \
388 task_tgid_nr(current), ## __VA_ARGS__)
Rusty Russellf0242472007-08-01 10:48:02 +1000389
Christoffer Dalla737f252012-06-03 21:17:48 +0300390/* The guest did something we don't support. */
391#define vcpu_unimpl(vcpu, fmt, ...) \
392 kvm_pr_unimpl("vcpu%i " fmt, (vcpu)->vcpu_id, ## __VA_ARGS__)
Avi Kivity6aa8b732006-12-10 02:21:36 -0800393
Gleb Natapov988a2ca2009-06-09 15:56:29 +0300394static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
395{
396 smp_rmb();
397 return kvm->vcpus[i];
398}
399
400#define kvm_for_each_vcpu(idx, vcpup, kvm) \
Jeff Mahoneyb42fc3c2011-04-12 21:30:17 -0400401 for (idx = 0; \
402 idx < atomic_read(&kvm->online_vcpus) && \
403 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
404 idx++)
Gleb Natapov988a2ca2009-06-09 15:56:29 +0300405
Xiao Guangrongbe6ba0f2011-11-24 17:39:18 +0800406#define kvm_for_each_memslot(memslot, slots) \
407 for (memslot = &slots->memslots[0]; \
Xiao Guangrongbf3e05b2011-11-24 17:40:57 +0800408 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
409 memslot++)
Xiao Guangrongbe6ba0f2011-11-24 17:39:18 +0800410
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000411int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
412void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
413
Michael S. Tsirkin9fc77442012-09-16 11:50:30 +0300414int __must_check vcpu_load(struct kvm_vcpu *vcpu);
Carsten Otte313a3dc2007-10-11 19:16:52 +0200415void vcpu_put(struct kvm_vcpu *vcpu);
416
Avi Kivity0ee75be2010-04-28 15:39:01 +0300417int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
Rusty Russellc16f8622007-07-30 21:12:19 +1000418 struct module *module);
Zhang Xiantaocb498ea2007-11-14 20:39:31 +0800419void kvm_exit(void);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800420
Izik Eidusd39f13b2008-03-30 16:01:25 +0300421void kvm_get_kvm(struct kvm *kvm);
422void kvm_put_kvm(struct kvm *kvm);
Xiao Guangrongbe593d62011-11-24 17:38:24 +0800423void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new);
Izik Eidusd39f13b2008-03-30 16:01:25 +0300424
Lai Jiangshan90d83dc2010-04-19 17:41:23 +0800425static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
426{
427 return rcu_dereference_check(kvm->memslots,
428 srcu_read_lock_held(&kvm->srcu)
429 || lockdep_is_held(&kvm->slots_lock));
430}
431
Xiao Guangrong28a37542011-11-24 19:04:35 +0800432static inline struct kvm_memory_slot *
433id_to_memslot(struct kvm_memslots *slots, int id)
434{
Xiao Guangrongf85e2cb2011-11-24 17:41:54 +0800435 int index = slots->id_to_index[id];
436 struct kvm_memory_slot *slot;
Xiao Guangrongbf3e05b2011-11-24 17:40:57 +0800437
Xiao Guangrongf85e2cb2011-11-24 17:41:54 +0800438 slot = &slots->memslots[index];
Xiao Guangrongbf3e05b2011-11-24 17:40:57 +0800439
Xiao Guangrongf85e2cb2011-11-24 17:41:54 +0800440 WARN_ON(slot->id != id);
441 return slot;
Xiao Guangrong28a37542011-11-24 19:04:35 +0800442}
443
Izik Eidus210c7c42007-10-24 23:52:57 +0200444int kvm_set_memory_region(struct kvm *kvm,
445 struct kvm_userspace_memory_region *mem,
446 int user_alloc);
Sheng Yangf78e0e22007-10-29 09:40:42 +0800447int __kvm_set_memory_region(struct kvm *kvm,
448 struct kvm_userspace_memory_region *mem,
449 int user_alloc);
Takuya Yoshikawadb3fe4e2012-02-08 13:02:18 +0900450void kvm_arch_free_memslot(struct kvm_memory_slot *free,
451 struct kvm_memory_slot *dont);
452int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages);
Marcelo Tosattif7784b82009-12-23 14:35:18 -0200453int kvm_arch_prepare_memory_region(struct kvm *kvm,
454 struct kvm_memory_slot *memslot,
455 struct kvm_memory_slot old,
456 struct kvm_userspace_memory_region *mem,
457 int user_alloc);
458void kvm_arch_commit_memory_region(struct kvm *kvm,
Zhang Xiantao0de10342007-11-20 16:25:04 +0800459 struct kvm_userspace_memory_region *mem,
460 struct kvm_memory_slot old,
461 int user_alloc);
Takuya Yoshikawadb3fe4e2012-02-08 13:02:18 +0900462bool kvm_largepages_enabled(void);
Marcelo Tosatti54dee992009-06-11 12:07:44 -0300463void kvm_disable_largepages(void);
Marcelo Tosatti2df72e92012-08-24 15:54:57 -0300464/* flush all memory translations */
465void kvm_arch_flush_shadow_all(struct kvm *kvm);
466/* flush memory translations pointing to 'slot' */
467void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
468 struct kvm_memory_slot *slot);
Marcelo Tosattia983fb22009-12-23 14:35:23 -0200469
Xiao Guangrong48987782010-08-22 19:11:43 +0800470int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
471 int nr_pages);
472
Avi Kivity954bbbc2007-03-30 14:02:32 +0300473struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
Marcelo Tosatti05da4552008-02-23 11:44:30 -0300474unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
Xiao Guangrong4d8b81a2012-08-21 11:02:51 +0800475unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
Izik Eidusb4231d62007-11-20 11:49:33 +0200476void kvm_release_page_clean(struct page *page);
477void kvm_release_page_dirty(struct page *page);
Anthony Liguori35149e22008-04-02 14:46:56 -0500478void kvm_set_page_dirty(struct page *page);
479void kvm_set_page_accessed(struct page *page);
480
Xiao Guangrong365fb3f2010-08-28 19:24:13 +0800481pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
Marcelo Tosatti612819c2010-10-22 14:18:18 -0200482pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
483 bool write_fault, bool *writable);
Anthony Liguori35149e22008-04-02 14:46:56 -0500484pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
Marcelo Tosatti612819c2010-10-22 14:18:18 -0200485pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
486 bool *writable);
Xiao Guangrongd5661042012-07-17 21:56:16 +0800487pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn);
Xiao Guangrong037d92d2012-08-21 10:59:12 +0800488pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn);
489
Xiao Guangrong32cad842012-08-03 15:42:52 +0800490void kvm_release_pfn_dirty(pfn_t pfn);
Anthony Liguori35149e22008-04-02 14:46:56 -0500491void kvm_release_pfn_clean(pfn_t pfn);
492void kvm_set_pfn_dirty(pfn_t pfn);
493void kvm_set_pfn_accessed(pfn_t pfn);
494void kvm_get_pfn(pfn_t pfn);
495
Izik Eidus195aefd2007-10-01 22:14:18 +0200496int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
497 int len);
Marcelo Tosatti7ec54582007-12-20 19:18:23 -0500498int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
499 unsigned long len);
Izik Eidus195aefd2007-10-01 22:14:18 +0200500int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
Gleb Natapove03b6442011-07-11 15:28:11 -0400501int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
502 void *data, unsigned long len);
Izik Eidus195aefd2007-10-01 22:14:18 +0200503int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
504 int offset, int len);
505int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
506 unsigned long len);
Gleb Natapov49c77542010-10-18 15:22:23 +0200507int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
508 void *data, unsigned long len);
509int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
510 gpa_t gpa);
Izik Eidus195aefd2007-10-01 22:14:18 +0200511int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
512int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800513struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
Izik Eiduse0d62c72007-10-24 23:57:46 +0200514int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
Joerg Roedel8f0b1ab2010-01-28 12:37:56 +0100515unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800516void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
Gleb Natapov49c77542010-10-18 15:22:23 +0200517void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
518 gfn_t gfn);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800519
Hollis Blanchard8776e512007-10-31 17:24:24 -0500520void kvm_vcpu_block(struct kvm_vcpu *vcpu);
Christoffer Dallb6d33832012-03-08 16:44:24 -0500521void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
Konstantin Weitz41628d32012-04-25 15:30:38 +0200522bool kvm_vcpu_yield_to(struct kvm_vcpu *target);
Zhai, Edwind255f4f2009-10-09 18:03:20 +0800523void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800524void kvm_resched(struct kvm_vcpu *vcpu);
Avi Kivity7702fd12007-06-14 16:27:40 +0300525void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
526void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
Xiao Guangronga4ee1ca2010-11-23 11:13:00 +0800527
Avi Kivityd9e368d2007-06-07 19:18:30 +0300528void kvm_flush_remote_tlbs(struct kvm *kvm);
Marcelo Tosatti2e53d632008-02-20 14:47:24 -0500529void kvm_reload_remote_mmus(struct kvm *kvm);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800530
Carsten Otte043405e2007-10-10 17:16:19 +0200531long kvm_arch_dev_ioctl(struct file *filp,
532 unsigned int ioctl, unsigned long arg);
Carsten Otte313a3dc2007-10-11 19:16:52 +0200533long kvm_arch_vcpu_ioctl(struct file *filp,
534 unsigned int ioctl, unsigned long arg);
Carsten Otte5b1c1492012-01-04 10:25:23 +0100535int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
Zhang Xiantao018d00d2007-11-15 23:07:47 +0800536
537int kvm_dev_ioctl_check_extension(long ext);
538
Zhang Xiantao5bb064d2007-11-18 20:29:43 +0800539int kvm_get_dirty_log(struct kvm *kvm,
540 struct kvm_dirty_log *log, int *is_dirty);
541int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
542 struct kvm_dirty_log *log);
543
Carsten Otte1fe779f2007-10-29 16:08:35 +0100544int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
545 struct
546 kvm_userspace_memory_region *mem,
547 int user_alloc);
Christoffer Dall23d43cf2012-07-24 08:51:20 -0400548int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level);
Carsten Otte1fe779f2007-10-29 16:08:35 +0100549long kvm_arch_vm_ioctl(struct file *filp,
550 unsigned int ioctl, unsigned long arg);
Carsten Otte313a3dc2007-10-11 19:16:52 +0200551
Hollis Blanchardd0752062007-10-31 17:24:25 -0500552int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
553int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
554
Zhang Xiantao8b006792007-11-16 13:05:55 +0800555int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
556 struct kvm_translation *tr);
557
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -0500558int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
559int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
560int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
561 struct kvm_sregs *sregs);
562int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
563 struct kvm_sregs *sregs);
Marcelo Tosatti62d9f0d2008-04-11 13:24:45 -0300564int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
565 struct kvm_mp_state *mp_state);
566int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
567 struct kvm_mp_state *mp_state);
Jan Kiszkad0bfb942008-12-15 13:52:10 +0100568int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
569 struct kvm_guest_debug *dbg);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -0500570int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
571
Zhang Xiantaof8c16bb2007-11-14 20:40:21 +0800572int kvm_arch_init(void *opaque);
573void kvm_arch_exit(void);
Carsten Otte043405e2007-10-10 17:16:19 +0200574
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +0800575int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
576void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
577
578void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
579void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
580void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
581struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
Avi Kivity26e52152007-11-20 15:30:24 +0200582int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
Hollis Blanchardd40ccc62007-11-19 14:04:43 -0600583void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +0800584
585int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
Alexander Graf10474ae2009-09-15 11:37:46 +0200586int kvm_arch_hardware_enable(void *garbage);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +0800587void kvm_arch_hardware_disable(void *garbage);
588int kvm_arch_hardware_setup(void);
589void kvm_arch_hardware_unsetup(void);
590void kvm_arch_check_processor_compat(void *rtn);
Zhang Xiantao1d737c82007-12-14 09:35:10 +0800591int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
Christoffer Dallb6d33832012-03-08 16:44:24 -0500592int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +0800593
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +0800594void kvm_free_physmem(struct kvm *kvm);
595
Takuya Yoshikawac1a7b322012-05-20 13:15:07 +0900596void *kvm_kvzalloc(unsigned long size);
597void kvm_kvfree(const void *addr);
598
Jan Kiszkad89f5ef2010-11-09 17:02:49 +0100599#ifndef __KVM_HAVE_ARCH_VM_ALLOC
600static inline struct kvm *kvm_arch_alloc_vm(void)
601{
602 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
603}
604
605static inline void kvm_arch_free_vm(struct kvm *kvm)
606{
607 kfree(kvm);
608}
609#endif
610
Christoffer Dallb6d33832012-03-08 16:44:24 -0500611static inline wait_queue_head_t *kvm_arch_vcpu_wq(struct kvm_vcpu *vcpu)
612{
Alexander Graf2246f8b2012-03-13 22:35:01 +0100613#ifdef __KVM_HAVE_ARCH_WQP
614 return vcpu->arch.wqp;
615#else
Christoffer Dallb6d33832012-03-08 16:44:24 -0500616 return &vcpu->wq;
Christoffer Dallb6d33832012-03-08 16:44:24 -0500617#endif
Alexander Graf2246f8b2012-03-13 22:35:01 +0100618}
Christoffer Dallb6d33832012-03-08 16:44:24 -0500619
Carsten Ottee08b9632012-01-04 10:25:20 +0100620int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +0800621void kvm_arch_destroy_vm(struct kvm *kvm);
Xiantao Zhang8a98f662008-10-06 13:47:38 +0800622void kvm_free_all_assigned_devices(struct kvm *kvm);
Sheng Yangad8ba2c2009-01-06 10:03:02 +0800623void kvm_arch_sync_events(struct kvm *kvm);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +0800624
Marcelo Tosatti3d808402008-04-11 14:53:26 -0300625int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
Zhang Xiantao57361992007-12-17 14:21:40 +0800626void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
Zhang Xiantao682c59a2007-12-11 20:36:00 +0800627
Xiao Guangronga2766322012-07-26 11:58:59 +0800628bool kvm_is_mmio_pfn(pfn_t pfn);
Xiantao Zhangc77fb9d2008-09-27 10:55:40 +0800629
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +0300630struct kvm_irq_ack_notifier {
631 struct hlist_node link;
632 unsigned gsi;
633 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
634};
635
636struct kvm_assigned_dev_kernel {
637 struct kvm_irq_ack_notifier ack_notifier;
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +0300638 struct list_head list;
639 int assigned_dev_id;
Zhai, Edwinab9f4ec2010-01-29 14:38:44 +0800640 int host_segnr;
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +0300641 int host_busnr;
642 int host_devfn;
Sheng Yangc1e01512009-02-25 17:22:26 +0800643 unsigned int entries_nr;
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +0300644 int host_irq;
Mark McLoughlindefaf152008-12-02 12:16:33 +0000645 bool host_irq_disabled;
Jan Kiszka07700a92012-02-28 14:19:54 +0100646 bool pci_2_3;
Sheng Yangc1e01512009-02-25 17:22:26 +0800647 struct msix_entry *host_msix_entries;
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +0300648 int guest_irq;
Jan Kiszka06452112010-11-16 22:30:03 +0100649 struct msix_entry *guest_msix_entries;
Sheng Yang4f906c12008-11-24 14:32:51 +0800650 unsigned long irq_requested_type;
Sheng Yang5550af42008-10-15 20:15:06 +0800651 int irq_source_id;
Weidong Hanb6535742008-12-08 23:29:53 +0800652 int flags;
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +0300653 struct pci_dev *dev;
654 struct kvm *kvm;
Jan Kiszka06452112010-11-16 22:30:03 +0100655 spinlock_t intx_lock;
Jan Kiszkacf9eeac2012-03-14 11:02:11 +0100656 spinlock_t intx_mask_lock;
Jan Kiszka1e001d42010-11-16 22:30:04 +0100657 char irq_name[32];
Alex Williamsonf8fcfd72011-05-10 10:02:39 -0600658 struct pci_saved_state *pci_saved_state;
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +0300659};
Avi Kivity75858a82009-01-04 17:10:50 +0200660
661struct kvm_irq_mask_notifier {
662 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
663 int irq;
664 struct hlist_node link;
665};
666
667void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
668 struct kvm_irq_mask_notifier *kimn);
669void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
670 struct kvm_irq_mask_notifier *kimn);
Gleb Natapov4a994352010-07-11 15:32:23 +0300671void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
672 bool mask);
Avi Kivity75858a82009-01-04 17:10:50 +0200673
Gleb Natapov46e624b2009-08-24 11:54:20 +0300674#ifdef __KVM_HAVE_IOAPIC
675void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
676 union kvm_ioapic_redirect_entry *entry,
677 unsigned long *deliver_bitmask);
678#endif
679int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
Michael S. Tsirkinbd2b53b2010-11-18 19:09:08 +0200680int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
681 int irq_source_id, int level);
Marcelo Tosatti44882ee2009-01-27 15:12:38 -0200682void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
Xiantao Zhang3de42dc2008-10-06 13:48:45 +0800683void kvm_register_irq_ack_notifier(struct kvm *kvm,
684 struct kvm_irq_ack_notifier *kian);
Marcelo Tosattifa40a822009-06-04 15:08:24 -0300685void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
686 struct kvm_irq_ack_notifier *kian);
Sheng Yang5550af42008-10-15 20:15:06 +0800687int kvm_request_irq_source_id(struct kvm *kvm);
688void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +0300689
Sheng Yang522c68c2009-04-27 20:35:43 +0800690/* For vcpu->arch.iommu_flags */
691#define KVM_IOMMU_CACHE_COHERENCY 0x1
692
Joerg Roedel19de40a2008-12-03 14:43:34 +0100693#ifdef CONFIG_IOMMU_API
Marcelo Tosatti3ad26d82009-12-23 14:35:20 -0200694int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
Alex Williamson32f6daa2012-04-11 09:51:49 -0600695void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
Weidong Han260782b2008-12-02 21:03:39 +0800696int kvm_iommu_map_guest(struct kvm *kvm);
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +0300697int kvm_iommu_unmap_guest(struct kvm *kvm);
Weidong Han260782b2008-12-02 21:03:39 +0800698int kvm_assign_device(struct kvm *kvm,
699 struct kvm_assigned_dev_kernel *assigned_dev);
Weidong Han0a920352008-12-02 21:24:23 +0800700int kvm_deassign_device(struct kvm *kvm,
701 struct kvm_assigned_dev_kernel *assigned_dev);
Joerg Roedel19de40a2008-12-03 14:43:34 +0100702#else /* CONFIG_IOMMU_API */
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +0300703static inline int kvm_iommu_map_pages(struct kvm *kvm,
Jan Kiszkad7a79b62010-10-14 13:59:04 +0200704 struct kvm_memory_slot *slot)
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +0300705{
706 return 0;
707}
708
Alex Williamson32f6daa2012-04-11 09:51:49 -0600709static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
710 struct kvm_memory_slot *slot)
711{
712}
713
Weidong Han260782b2008-12-02 21:03:39 +0800714static inline int kvm_iommu_map_guest(struct kvm *kvm)
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +0300715{
716 return -ENODEV;
717}
718
719static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
720{
721 return 0;
722}
Weidong Han260782b2008-12-02 21:03:39 +0800723
724static inline int kvm_assign_device(struct kvm *kvm,
725 struct kvm_assigned_dev_kernel *assigned_dev)
726{
727 return 0;
728}
Weidong Han0a920352008-12-02 21:24:23 +0800729
730static inline int kvm_deassign_device(struct kvm *kvm,
731 struct kvm_assigned_dev_kernel *assigned_dev)
732{
733 return 0;
734}
Joerg Roedel19de40a2008-12-03 14:43:34 +0100735#endif /* CONFIG_IOMMU_API */
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +0300736
Laurent Vivierd172fcd2007-10-15 17:00:19 +0200737static inline void kvm_guest_enter(void)
738{
Gleb Natapov8fa22062011-05-04 16:31:04 +0300739 BUG_ON(preemptible());
Frederic Weisbeckerbf9fae92012-09-08 15:23:11 +0200740 vtime_account(current);
Laurent Vivierd172fcd2007-10-15 17:00:19 +0200741 current->flags |= PF_VCPU;
Gleb Natapov8fa22062011-05-04 16:31:04 +0300742 /* KVM does not hold any references to rcu protected data when it
743 * switches CPU into a guest mode. In fact switching to a guest mode
744 * is very similar to exiting to userspase from rcu point of view. In
745 * addition CPU may stay in a guest mode for quite a long time (up to
746 * one time slice). Lets treat guest mode as quiescent state, just like
747 * we do with user-mode execution.
748 */
749 rcu_virt_note_context_switch(smp_processor_id());
Laurent Vivierd172fcd2007-10-15 17:00:19 +0200750}
751
752static inline void kvm_guest_exit(void)
753{
Frederic Weisbeckerbf9fae92012-09-08 15:23:11 +0200754 vtime_account(current);
Laurent Vivierd172fcd2007-10-15 17:00:19 +0200755 current->flags &= ~PF_VCPU;
756}
757
Paul Mackerras9d4cba72012-01-12 20:09:51 +0000758/*
759 * search_memslots() and __gfn_to_memslot() are here because they are
760 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
761 * gfn_to_memslot() itself isn't here as an inline because that would
762 * bloat other code too much.
763 */
764static inline struct kvm_memory_slot *
765search_memslots(struct kvm_memslots *slots, gfn_t gfn)
766{
767 struct kvm_memory_slot *memslot;
768
769 kvm_for_each_memslot(memslot, slots)
770 if (gfn >= memslot->base_gfn &&
771 gfn < memslot->base_gfn + memslot->npages)
772 return memslot;
773
774 return NULL;
775}
776
777static inline struct kvm_memory_slot *
778__gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
779{
780 return search_memslots(slots, gfn);
781}
782
Gavin Shan66a03502012-08-24 16:50:28 +0800783static inline unsigned long
784__gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn)
785{
786 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
787}
788
Xiao Guangrong0ee8dcb2011-03-09 15:41:59 +0800789static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
790{
791 return gfn_to_memslot(kvm, gfn)->id;
792}
793
Takuya Yoshikawafb03cb62012-02-08 12:59:10 +0900794static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level)
795{
796 /* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */
797 return (gfn >> KVM_HPAGE_GFN_SHIFT(level)) -
798 (base_gfn >> KVM_HPAGE_GFN_SHIFT(level));
799}
800
Takuya Yoshikawad19a7482012-07-02 17:54:30 +0900801static inline gfn_t
802hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot)
Xiao Guangrong887c08a2010-08-22 19:10:28 +0800803{
Takuya Yoshikawad19a7482012-07-02 17:54:30 +0900804 gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT;
805
806 return slot->base_gfn + gfn_offset;
Xiao Guangrong887c08a2010-08-22 19:10:28 +0800807}
808
Avi Kivity1755fbc2007-11-21 14:44:45 +0200809static inline gpa_t gfn_to_gpa(gfn_t gfn)
810{
811 return (gpa_t)gfn << PAGE_SHIFT;
812}
Avi Kivity6aa8b732006-12-10 02:21:36 -0800813
Joerg Roedelc30a3582010-09-10 17:30:48 +0200814static inline gfn_t gpa_to_gfn(gpa_t gpa)
815{
816 return (gfn_t)(gpa >> PAGE_SHIFT);
817}
818
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +0300819static inline hpa_t pfn_to_hpa(pfn_t pfn)
820{
821 return (hpa_t)pfn << PAGE_SHIFT;
822}
823
Marcelo Tosatti2f599712008-05-27 12:10:20 -0300824static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
Avi Kivity2f52d582008-01-16 12:49:30 +0200825{
826 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
827}
828
Avi Kivityba1389b2007-11-18 16:24:12 +0200829enum kvm_stat_kind {
830 KVM_STAT_VM,
831 KVM_STAT_VCPU,
832};
833
Hollis Blanchard417bc302007-10-31 17:24:23 -0500834struct kvm_stats_debugfs_item {
835 const char *name;
836 int offset;
Avi Kivityba1389b2007-11-18 16:24:12 +0200837 enum kvm_stat_kind kind;
Hollis Blanchard417bc302007-10-31 17:24:23 -0500838 struct dentry *dentry;
839};
840extern struct kvm_stats_debugfs_item debugfs_entries[];
Hollis Blanchard76f7c872008-04-15 16:05:42 -0500841extern struct dentry *kvm_debugfs_dir;
Feng(Eric) Liud4c9ff22008-04-10 08:47:53 -0400842
Marc Zyngier36c1ed82012-06-15 15:07:24 -0400843#if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER)
Andrea Arcangelie930bff2008-07-25 16:24:52 +0200844static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
845{
846 if (unlikely(vcpu->kvm->mmu_notifier_count))
847 return 1;
848 /*
Paul Mackerrasa355aa52011-12-12 12:37:21 +0000849 * Ensure the read of mmu_notifier_count happens before the read
850 * of mmu_notifier_seq. This interacts with the smp_wmb() in
851 * mmu_notifier_invalidate_range_end to make sure that the caller
852 * either sees the old (non-zero) value of mmu_notifier_count or
853 * the new (incremented) value of mmu_notifier_seq.
854 * PowerPC Book3s HV KVM calls this under a per-page lock
855 * rather than under kvm->mmu_lock, for scalability, so
856 * can't rely on kvm->mmu_lock to keep things ordered.
Andrea Arcangelie930bff2008-07-25 16:24:52 +0200857 */
Paul Mackerrasa355aa52011-12-12 12:37:21 +0000858 smp_rmb();
Andrea Arcangelie930bff2008-07-25 16:24:52 +0200859 if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
860 return 1;
861 return 0;
862}
863#endif
864
Marc Zyngier9900b4b2012-06-15 15:07:02 -0400865#ifdef KVM_CAP_IRQ_ROUTING
Avi Kivity399ec802008-11-19 13:58:46 +0200866
867#define KVM_MAX_IRQ_ROUTES 1024
868
869int kvm_setup_default_irq_routing(struct kvm *kvm);
870int kvm_set_irq_routing(struct kvm *kvm,
871 const struct kvm_irq_routing_entry *entries,
872 unsigned nr,
873 unsigned flags);
874void kvm_free_irq_routing(struct kvm *kvm);
875
Jan Kiszka07975ad2012-03-29 21:14:12 +0200876int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
877
Avi Kivity399ec802008-11-19 13:58:46 +0200878#else
879
880static inline void kvm_free_irq_routing(struct kvm *kvm) {}
881
882#endif
883
Gregory Haskins721eecb2009-05-20 10:30:49 -0400884#ifdef CONFIG_HAVE_KVM_EVENTFD
885
Gregory Haskinsd34e6b12009-07-07 17:08:49 -0400886void kvm_eventfd_init(struct kvm *kvm);
Alex Williamsond4db2932012-06-29 09:56:08 -0600887int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args);
Gregory Haskins721eecb2009-05-20 10:30:49 -0400888void kvm_irqfd_release(struct kvm *kvm);
Michael S. Tsirkinbd2b53b2010-11-18 19:09:08 +0200889void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
Gregory Haskinsd34e6b12009-07-07 17:08:49 -0400890int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
Gregory Haskins721eecb2009-05-20 10:30:49 -0400891
892#else
893
Gregory Haskinsd34e6b12009-07-07 17:08:49 -0400894static inline void kvm_eventfd_init(struct kvm *kvm) {}
Michael S. Tsirkinbd2b53b2010-11-18 19:09:08 +0200895
Alex Williamsond4db2932012-06-29 09:56:08 -0600896static inline int kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
Gregory Haskins721eecb2009-05-20 10:30:49 -0400897{
898 return -EINVAL;
899}
900
901static inline void kvm_irqfd_release(struct kvm *kvm) {}
Michael S. Tsirkinbd2b53b2010-11-18 19:09:08 +0200902
Alexander Graf27923eb2010-11-25 10:25:44 +0100903#ifdef CONFIG_HAVE_KVM_IRQCHIP
Michael S. Tsirkinbd2b53b2010-11-18 19:09:08 +0200904static inline void kvm_irq_routing_update(struct kvm *kvm,
905 struct kvm_irq_routing_table *irq_rt)
906{
907 rcu_assign_pointer(kvm->irq_routing, irq_rt);
908}
Alexander Graf27923eb2010-11-25 10:25:44 +0100909#endif
Michael S. Tsirkinbd2b53b2010-11-18 19:09:08 +0200910
Gregory Haskinsd34e6b12009-07-07 17:08:49 -0400911static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
912{
913 return -ENOSYS;
914}
Gregory Haskins721eecb2009-05-20 10:30:49 -0400915
916#endif /* CONFIG_HAVE_KVM_EVENTFD */
917
Gleb Natapov73880c82009-06-09 15:56:28 +0300918#ifdef CONFIG_KVM_APIC_ARCHITECTURE
Gleb Natapovc5af89b2009-06-09 15:56:26 +0300919static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
920{
Marcelo Tosattid3efc8e2009-06-17 10:07:59 -0300921 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
Gleb Natapovc5af89b2009-06-09 15:56:26 +0300922}
Avi Kivity3e515702012-03-05 14:23:29 +0200923
924bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu);
925
926#else
927
928static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
929
Avi Kivity6aa8b732006-12-10 02:21:36 -0800930#endif
Avi Kivitybfd99ff2009-08-26 14:57:50 +0300931
932#ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
933
934long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
935 unsigned long arg);
936
937#else
938
939static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
940 unsigned long arg)
941{
942 return -ENOTTY;
943}
944
Gleb Natapov73880c82009-06-09 15:56:28 +0300945#endif
Avi Kivitybfd99ff2009-08-26 14:57:50 +0300946
Avi Kivitya8eeb042010-05-10 12:34:53 +0300947static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
948{
949 set_bit(req, &vcpu->requests);
950}
951
Avi Kivitya8eeb042010-05-10 12:34:53 +0300952static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
953{
Avi Kivity07198372010-05-10 13:08:26 +0300954 if (test_bit(req, &vcpu->requests)) {
955 clear_bit(req, &vcpu->requests);
956 return true;
957 } else {
958 return false;
959 }
Avi Kivitya8eeb042010-05-10 12:34:53 +0300960}
961
Raghavendra K T4c088492012-07-18 19:07:46 +0530962#ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT
963
964static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
965{
966 vcpu->spin_loop.in_spin_loop = val;
967}
968static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
969{
970 vcpu->spin_loop.dy_eligible = val;
971}
972
973#else /* !CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
974
975static inline void kvm_vcpu_set_in_spin_loop(struct kvm_vcpu *vcpu, bool val)
976{
977}
978
979static inline void kvm_vcpu_set_dy_eligible(struct kvm_vcpu *vcpu, bool val)
980{
981}
982
Raghavendra K T06e48c52012-07-19 15:17:52 +0530983static inline bool kvm_vcpu_eligible_for_directed_yield(struct kvm_vcpu *vcpu)
984{
985 return true;
986}
987
Raghavendra K T4c088492012-07-18 19:07:46 +0530988#endif /* CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT */
Avi Kivitybfd99ff2009-08-26 14:57:50 +0300989#endif
990