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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>
Alexey Dobriyane8edc6e2007-05-21 01:22:52 +040024#include <asm/signal.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080025
Avi Kivity6aa8b732006-12-10 02:21:36 -080026#include <linux/kvm.h>
Ingo Molnar102d8322007-02-19 14:37:47 +020027#include <linux/kvm_para.h>
Avi Kivity6aa8b732006-12-10 02:21:36 -080028
Avi Kivityedf88412007-12-16 11:02:48 +020029#include <linux/kvm_types.h>
Hollis Blanchardd77a39d2007-12-03 15:30:23 -060030
Avi Kivityedf88412007-12-16 11:02:48 +020031#include <asm/kvm_host.h>
Zhang Xiantaod657a982007-12-14 09:41:22 +080032
Avi Kivitycef4dea2010-01-20 12:01:20 +020033#ifndef KVM_MMIO_SIZE
34#define KVM_MMIO_SIZE 8
35#endif
36
Avi Kivity6aa8b732006-12-10 02:21:36 -080037/*
Avi Kivityd9e368d2007-06-07 19:18:30 +030038 * vcpu->requests bit members
39 */
Avi Kivity3176bc32007-10-16 17:22:08 +020040#define KVM_REQ_TLB_FLUSH 0
Avi Kivity2f52d582008-01-16 12:49:30 +020041#define KVM_REQ_MIGRATE_TIMER 1
Avi Kivityb209749f2007-10-22 16:50:39 +020042#define KVM_REQ_REPORT_TPR_ACCESS 2
Marcelo Tosatti2e53d632008-02-20 14:47:24 -050043#define KVM_REQ_MMU_RELOAD 3
Joerg Roedel71c4dfa2008-02-26 16:49:16 +010044#define KVM_REQ_TRIPLE_FAULT 4
Marcelo Tosatti06e05642008-06-06 16:37:36 -030045#define KVM_REQ_PENDING_TIMER 5
Marcelo Tosattid7690172008-09-08 15:23:48 -030046#define KVM_REQ_UNHALT 6
Marcelo Tosatti4731d4c2008-09-23 13:18:39 -030047#define KVM_REQ_MMU_SYNC 7
Zachary Amsden34c238a2010-09-18 14:38:14 -100048#define KVM_REQ_CLOCK_UPDATE 8
Marcelo Tosatti32f88402009-05-07 17:55:12 -030049#define KVM_REQ_KICK 9
Avi Kivity02daab22009-12-30 12:40:26 +020050#define KVM_REQ_DEACTIVATE_FPU 10
Avi Kivity3842d132010-07-27 12:30:24 +030051#define KVM_REQ_EVENT 11
Gleb Natapovaf585b92010-10-14 11:22:46 +020052#define KVM_REQ_APF_HALT 12
Glauber Costac9aaa892011-07-11 15:28:14 -040053#define KVM_REQ_STEAL_UPDATE 13
Avi Kivity7460fb4a2011-09-20 13:43:14 +030054#define KVM_REQ_NMI 14
Nadav Har'Eld6185f22011-09-22 13:52:56 +030055#define KVM_REQ_IMMEDIATE_EXIT 15
Gleb Natapovf5132b02011-11-10 14:57:22 +020056#define KVM_REQ_PMU 16
57#define KVM_REQ_PMI 17
Avi Kivity6aa8b732006-12-10 02:21:36 -080058
Sheng Yang5550af42008-10-15 20:15:06 +080059#define KVM_USERSPACE_IRQ_SOURCE_ID 0
60
Michael S. Tsirkin6c474692009-06-29 22:24:26 +030061struct kvm;
Avi Kivity6aa8b732006-12-10 02:21:36 -080062struct kvm_vcpu;
Rusty Russellc16f8622007-07-30 21:12:19 +100063extern struct kmem_cache *kvm_vcpu_cache;
Avi Kivity6aa8b732006-12-10 02:21:36 -080064
Sasha Levin743eeb02011-07-27 16:00:48 +030065struct kvm_io_range {
66 gpa_t addr;
67 int len;
68 struct kvm_io_device *dev;
69};
70
Gregory Haskins2eeb2e92007-05-31 14:08:53 -040071struct kvm_io_bus {
72 int dev_count;
Sasha Levin2b3c2462011-07-20 20:59:00 +030073#define NR_IOBUS_DEVS 300
Sasha Levin743eeb02011-07-27 16:00:48 +030074 struct kvm_io_range range[NR_IOBUS_DEVS];
Gregory Haskins2eeb2e92007-05-31 14:08:53 -040075};
76
Marcelo Tosattie93f8a02009-12-23 14:35:24 -020077enum kvm_bus {
78 KVM_MMIO_BUS,
79 KVM_PIO_BUS,
80 KVM_NR_BUSES
81};
82
83int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
84 int len, const void *val);
85int 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 +030086 void *val);
Sasha Levin743eeb02011-07-27 16:00:48 +030087int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr,
88 int len, struct kvm_io_device *dev);
Marcelo Tosattie93f8a02009-12-23 14:35:24 -020089int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx,
90 struct kvm_io_device *dev);
Gregory Haskins2eeb2e92007-05-31 14:08:53 -040091
Gleb Natapovaf585b92010-10-14 11:22:46 +020092#ifdef CONFIG_KVM_ASYNC_PF
93struct kvm_async_pf {
94 struct work_struct work;
95 struct list_head link;
96 struct list_head queue;
97 struct kvm_vcpu *vcpu;
98 struct mm_struct *mm;
99 gva_t gva;
100 unsigned long addr;
101 struct kvm_arch_async_pf arch;
102 struct page *page;
103 bool done;
104};
105
106void kvm_clear_async_pf_completion_queue(struct kvm_vcpu *vcpu);
107void kvm_check_async_pf_completion(struct kvm_vcpu *vcpu);
108int kvm_setup_async_pf(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
109 struct kvm_arch_async_pf *arch);
Gleb Natapov344d9582010-10-14 11:22:50 +0200110int kvm_async_pf_wakeup_all(struct kvm_vcpu *vcpu);
Gleb Natapovaf585b92010-10-14 11:22:46 +0200111#endif
112
Xiao Guangrong6b7e2d02011-01-12 15:40:31 +0800113enum {
114 OUTSIDE_GUEST_MODE,
115 IN_GUEST_MODE,
116 EXITING_GUEST_MODE
117};
118
Zhang Xiantaod657a982007-12-14 09:41:22 +0800119struct kvm_vcpu {
Zhang Xiantaod17fbbf2007-12-14 09:45:31 +0800120 struct kvm *kvm;
Hollis Blanchard31bb1172008-01-28 17:42:34 -0600121#ifdef CONFIG_PREEMPT_NOTIFIERS
Zhang Xiantaod17fbbf2007-12-14 09:45:31 +0800122 struct preempt_notifier preempt_notifier;
Hollis Blanchard31bb1172008-01-28 17:42:34 -0600123#endif
Xiao Guangrong6b7e2d02011-01-12 15:40:31 +0800124 int cpu;
Zhang Xiantaod17fbbf2007-12-14 09:45:31 +0800125 int vcpu_id;
Xiao Guangrong6b7e2d02011-01-12 15:40:31 +0800126 int srcu_idx;
127 int mode;
Zhang Xiantaod17fbbf2007-12-14 09:45:31 +0800128 unsigned long requests;
Jan Kiszkad0bfb942008-12-15 13:52:10 +0100129 unsigned long guest_debug;
Xiao Guangrong6b7e2d02011-01-12 15:40:31 +0800130
131 struct mutex mutex;
132 struct kvm_run *run;
Marcelo Tosattif656ce02009-12-23 14:35:25 -0200133
Zhang Xiantaod17fbbf2007-12-14 09:45:31 +0800134 int fpu_active;
Dexuan Cui2acf9232010-06-10 11:27:12 +0800135 int guest_fpu_loaded, guest_xcr0_loaded;
Zhang Xiantaod17fbbf2007-12-14 09:45:31 +0800136 wait_queue_head_t wq;
Rik van Riel34bb10b2011-02-01 09:52:41 -0500137 struct pid *pid;
Zhang Xiantaod17fbbf2007-12-14 09:45:31 +0800138 int sigset_active;
139 sigset_t sigset;
140 struct kvm_vcpu_stat stat;
141
142#ifdef CONFIG_HAS_IOMEM
143 int mmio_needed;
144 int mmio_read_completed;
145 int mmio_is_write;
146 int mmio_size;
Avi Kivitycef4dea2010-01-20 12:01:20 +0200147 int mmio_index;
148 unsigned char mmio_data[KVM_MMIO_SIZE];
Zhang Xiantaod17fbbf2007-12-14 09:45:31 +0800149 gpa_t mmio_phys_addr;
150#endif
Zhang Xiantaod657a982007-12-14 09:41:22 +0800151
Gleb Natapovaf585b92010-10-14 11:22:46 +0200152#ifdef CONFIG_KVM_ASYNC_PF
153 struct {
154 u32 queued;
155 struct list_head queue;
156 struct list_head done;
157 spinlock_t lock;
158 } async_pf;
159#endif
160
Zhang Xiantaod657a982007-12-14 09:41:22 +0800161 struct kvm_vcpu_arch arch;
162};
163
Xiao Guangrong6b7e2d02011-01-12 15:40:31 +0800164static inline int kvm_vcpu_exiting_guest_mode(struct kvm_vcpu *vcpu)
165{
166 return cmpxchg(&vcpu->mode, IN_GUEST_MODE, EXITING_GUEST_MODE);
167}
168
Takuya Yoshikawa660c22c2010-04-13 22:47:24 +0900169/*
170 * Some of the bitops functions do not support too long bitmaps.
171 * This number must be determined not to exceed such limits.
172 */
173#define KVM_MEM_MAX_NR_PAGES ((1UL << 31) - 1)
174
Avi Kivity6aa8b732006-12-10 02:21:36 -0800175struct kvm_memory_slot {
176 gfn_t base_gfn;
177 unsigned long npages;
178 unsigned long flags;
Izik Eidus290fc382007-09-27 14:11:22 +0200179 unsigned long *rmap;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800180 unsigned long *dirty_bitmap;
Takuya Yoshikawa515a0122010-10-27 18:23:54 +0900181 unsigned long *dirty_bitmap_head;
Takuya Yoshikawa7850ac52011-11-14 18:23:34 +0900182 unsigned long nr_dirty_pages;
Takuya Yoshikawadb3fe4e2012-02-08 13:02:18 +0900183 struct kvm_arch_memory_slot arch;
Izik Eidus8a7ae052007-10-18 11:09:33 +0200184 unsigned long userspace_addr;
Izik Eidus80b14b52007-10-25 11:54:04 +0200185 int user_alloc;
Avi Kivitye36d96f2010-06-21 10:56:36 +0300186 int id;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800187};
188
Takuya Yoshikawa87bf6e72010-04-12 19:35:35 +0900189static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
190{
191 return ALIGN(memslot->npages, BITS_PER_LONG) / 8;
192}
193
Avi Kivity399ec802008-11-19 13:58:46 +0200194struct kvm_kernel_irq_routing_entry {
195 u32 gsi;
Michael S. Tsirkin5116d8f2009-07-26 17:10:01 +0300196 u32 type;
Gleb Natapov49256632009-02-04 17:28:14 +0200197 int (*set)(struct kvm_kernel_irq_routing_entry *e,
Gleb Natapov1a6e4a82009-08-24 11:54:19 +0300198 struct kvm *kvm, int irq_source_id, int level);
Avi Kivity399ec802008-11-19 13:58:46 +0200199 union {
200 struct {
201 unsigned irqchip;
202 unsigned pin;
203 } irqchip;
Sheng Yang79950e12009-02-10 13:57:06 +0800204 struct msi_msg msi;
Avi Kivity399ec802008-11-19 13:58:46 +0200205 };
Gleb Natapov46e624b2009-08-24 11:54:20 +0300206 struct hlist_node link;
207};
208
Gleb Natapov3e71f882009-08-24 11:54:21 +0300209#ifdef __KVM_HAVE_IOAPIC
210
Gleb Natapov46e624b2009-08-24 11:54:20 +0300211struct kvm_irq_routing_table {
Gleb Natapov3e71f882009-08-24 11:54:21 +0300212 int chip[KVM_NR_IRQCHIPS][KVM_IOAPIC_NUM_PINS];
Gleb Natapov46e624b2009-08-24 11:54:20 +0300213 struct kvm_kernel_irq_routing_entry *rt_entries;
214 u32 nr_rt_entries;
215 /*
216 * Array indexed by gsi. Each entry contains list of irq chips
217 * the gsi is connected to.
218 */
219 struct hlist_head map[0];
Avi Kivity399ec802008-11-19 13:58:46 +0200220};
221
Gleb Natapov3e71f882009-08-24 11:54:21 +0300222#else
223
224struct kvm_irq_routing_table {};
225
226#endif
227
Xiao Guangrong93a5cef2011-11-24 17:37:48 +0800228#ifndef KVM_MEM_SLOTS_NUM
229#define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS)
230#endif
231
Xiao Guangrongbf3e05b2011-11-24 17:40:57 +0800232/*
233 * Note:
234 * memslots are not sorted by id anymore, please use id_to_memslot()
235 * to get the memslot by its id.
236 */
Marcelo Tosatti46a26bf2009-12-23 14:35:16 -0200237struct kvm_memslots {
Gleb Natapov49c77542010-10-18 15:22:23 +0200238 u64 generation;
Xiao Guangrong93a5cef2011-11-24 17:37:48 +0800239 struct kvm_memory_slot memslots[KVM_MEM_SLOTS_NUM];
Xiao Guangrongf85e2cb2011-11-24 17:41:54 +0800240 /* The mapping table from slot id to the index in memslots[]. */
241 int id_to_index[KVM_MEM_SLOTS_NUM];
Marcelo Tosatti46a26bf2009-12-23 14:35:16 -0200242};
243
Avi Kivity6aa8b732006-12-10 02:21:36 -0800244struct kvm {
Marcelo Tosattiaaee2c92007-12-20 19:18:26 -0500245 spinlock_t mmu_lock;
Marcelo Tosatti79fac952009-12-23 14:35:26 -0200246 struct mutex slots_lock;
Avi Kivity6d4e4c42007-11-21 16:41:05 +0200247 struct mm_struct *mm; /* userspace tied to this vm */
Marcelo Tosatti46a26bf2009-12-23 14:35:16 -0200248 struct kvm_memslots *memslots;
Marcelo Tosattibc6678a2009-12-23 14:35:21 -0200249 struct srcu_struct srcu;
Gleb Natapov73880c82009-06-09 15:56:28 +0300250#ifdef CONFIG_KVM_APIC_ARCHITECTURE
251 u32 bsp_vcpu_id;
Gleb Natapov73880c82009-06-09 15:56:28 +0300252#endif
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000253 struct kvm_vcpu *vcpus[KVM_MAX_VCPUS];
Gleb Natapov73880c82009-06-09 15:56:28 +0300254 atomic_t online_vcpus;
Rik van Riel217ece62011-02-01 09:53:28 -0500255 int last_boosted_vcpu;
Avi Kivity133de902007-02-12 00:54:44 -0800256 struct list_head vm_list;
Marcelo Tosatti60eead72009-06-04 15:08:23 -0300257 struct mutex lock;
Marcelo Tosattie93f8a02009-12-23 14:35:24 -0200258 struct kvm_io_bus *buses[KVM_NR_BUSES];
Gregory Haskins721eecb2009-05-20 10:30:49 -0400259#ifdef CONFIG_HAVE_KVM_EVENTFD
260 struct {
261 spinlock_t lock;
262 struct list_head items;
263 } irqfds;
Gregory Haskinsd34e6b12009-07-07 17:08:49 -0400264 struct list_head ioeventfds;
Gregory Haskins721eecb2009-05-20 10:30:49 -0400265#endif
Avi Kivityba1389b2007-11-18 16:24:12 +0200266 struct kvm_vm_stat stat;
Zhang Xiantaod69fb812007-12-14 09:54:20 +0800267 struct kvm_arch arch;
Izik Eidusd39f13b2008-03-30 16:01:25 +0300268 atomic_t users_count;
Laurent Vivier5f94c172008-05-30 16:05:54 +0200269#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
Laurent Vivier5f94c172008-05-30 16:05:54 +0200270 struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
Sasha Levin2b3c2462011-07-20 20:59:00 +0300271 spinlock_t ring_lock;
272 struct list_head coalesced_zones;
Laurent Vivier5f94c172008-05-30 16:05:54 +0200273#endif
Andrea Arcangelie930bff2008-07-25 16:24:52 +0200274
Marcelo Tosatti60eead72009-06-04 15:08:23 -0300275 struct mutex irq_lock;
Avi Kivity75858a82009-01-04 17:10:50 +0200276#ifdef CONFIG_HAVE_KVM_IRQCHIP
Michael S. Tsirkinbd2b53b2010-11-18 19:09:08 +0200277 /*
278 * Update side is protected by irq_lock and,
279 * if configured, irqfds.lock.
280 */
Arnd Bergmann4b6a2872010-03-04 15:59:23 +0100281 struct kvm_irq_routing_table __rcu *irq_routing;
Avi Kivity75858a82009-01-04 17:10:50 +0200282 struct hlist_head mask_notifier_list;
Gleb Natapov136bdfe2009-08-24 11:54:23 +0300283 struct hlist_head irq_ack_notifier_list;
Avi Kivity75858a82009-01-04 17:10:50 +0200284#endif
285
Andrea Arcangelie930bff2008-07-25 16:24:52 +0200286#ifdef KVM_ARCH_WANT_MMU_NOTIFIER
287 struct mmu_notifier mmu_notifier;
288 unsigned long mmu_notifier_seq;
289 long mmu_notifier_count;
290#endif
Avi Kivity5c663a12010-12-08 18:04:51 +0200291 long tlbs_dirty;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800292};
293
Rusty Russellf0242472007-08-01 10:48:02 +1000294/* The guest did something we don't support. */
295#define pr_unimpl(vcpu, fmt, ...) \
Jan Kiszkabd801582011-09-12 11:26:22 +0200296 pr_err_ratelimited("kvm: %i: cpu%i " fmt, \
297 current->tgid, (vcpu)->vcpu_id , ## __VA_ARGS__)
Rusty Russellf0242472007-08-01 10:48:02 +1000298
Avi Kivity6aa8b732006-12-10 02:21:36 -0800299#define kvm_printf(kvm, fmt ...) printk(KERN_DEBUG fmt)
300#define vcpu_printf(vcpu, fmt...) kvm_printf(vcpu->kvm, fmt)
301
Gleb Natapov988a2ca2009-06-09 15:56:29 +0300302static inline struct kvm_vcpu *kvm_get_vcpu(struct kvm *kvm, int i)
303{
304 smp_rmb();
305 return kvm->vcpus[i];
306}
307
308#define kvm_for_each_vcpu(idx, vcpup, kvm) \
Jeff Mahoneyb42fc3c2011-04-12 21:30:17 -0400309 for (idx = 0; \
310 idx < atomic_read(&kvm->online_vcpus) && \
311 (vcpup = kvm_get_vcpu(kvm, idx)) != NULL; \
312 idx++)
Gleb Natapov988a2ca2009-06-09 15:56:29 +0300313
Xiao Guangrongbe6ba0f2011-11-24 17:39:18 +0800314#define kvm_for_each_memslot(memslot, slots) \
315 for (memslot = &slots->memslots[0]; \
Xiao Guangrongbf3e05b2011-11-24 17:40:57 +0800316 memslot < slots->memslots + KVM_MEM_SLOTS_NUM && memslot->npages;\
317 memslot++)
Xiao Guangrongbe6ba0f2011-11-24 17:39:18 +0800318
Rusty Russellfb3f0f52007-07-27 17:16:56 +1000319int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id);
320void kvm_vcpu_uninit(struct kvm_vcpu *vcpu);
321
Carsten Otte313a3dc2007-10-11 19:16:52 +0200322void vcpu_load(struct kvm_vcpu *vcpu);
323void vcpu_put(struct kvm_vcpu *vcpu);
324
Avi Kivity0ee75be2010-04-28 15:39:01 +0300325int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
Rusty Russellc16f8622007-07-30 21:12:19 +1000326 struct module *module);
Zhang Xiantaocb498ea2007-11-14 20:39:31 +0800327void kvm_exit(void);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800328
Izik Eidusd39f13b2008-03-30 16:01:25 +0300329void kvm_get_kvm(struct kvm *kvm);
330void kvm_put_kvm(struct kvm *kvm);
Xiao Guangrongbe593d62011-11-24 17:38:24 +0800331void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new);
Izik Eidusd39f13b2008-03-30 16:01:25 +0300332
Lai Jiangshan90d83dc2010-04-19 17:41:23 +0800333static inline struct kvm_memslots *kvm_memslots(struct kvm *kvm)
334{
335 return rcu_dereference_check(kvm->memslots,
336 srcu_read_lock_held(&kvm->srcu)
337 || lockdep_is_held(&kvm->slots_lock));
338}
339
Xiao Guangrong28a37542011-11-24 19:04:35 +0800340static inline struct kvm_memory_slot *
341id_to_memslot(struct kvm_memslots *slots, int id)
342{
Xiao Guangrongf85e2cb2011-11-24 17:41:54 +0800343 int index = slots->id_to_index[id];
344 struct kvm_memory_slot *slot;
Xiao Guangrongbf3e05b2011-11-24 17:40:57 +0800345
Xiao Guangrongf85e2cb2011-11-24 17:41:54 +0800346 slot = &slots->memslots[index];
Xiao Guangrongbf3e05b2011-11-24 17:40:57 +0800347
Xiao Guangrongf85e2cb2011-11-24 17:41:54 +0800348 WARN_ON(slot->id != id);
349 return slot;
Xiao Guangrong28a37542011-11-24 19:04:35 +0800350}
351
Avi Kivity6aa8b732006-12-10 02:21:36 -0800352#define HPA_MSB ((sizeof(hpa_t) * 8) - 1)
353#define HPA_ERR_MASK ((hpa_t)1 << HPA_MSB)
354static inline int is_error_hpa(hpa_t hpa) { return hpa >> HPA_MSB; }
Avi Kivity6aa8b732006-12-10 02:21:36 -0800355
Izik Eiduscea7bb22007-10-17 19:17:48 +0200356extern struct page *bad_page;
Xiao Guangrongfce92dc2011-07-12 03:28:54 +0800357extern struct page *fault_page;
358
Anthony Liguori35149e22008-04-02 14:46:56 -0500359extern pfn_t bad_pfn;
Xiao Guangrongfce92dc2011-07-12 03:28:54 +0800360extern pfn_t fault_pfn;
Avi Kivity6aa8b732006-12-10 02:21:36 -0800361
Izik Eiduscea7bb22007-10-17 19:17:48 +0200362int is_error_page(struct page *page);
Anthony Liguori35149e22008-04-02 14:46:56 -0500363int is_error_pfn(pfn_t pfn);
Huang Yingbf998152010-05-31 14:28:19 +0800364int is_hwpoison_pfn(pfn_t pfn);
Gleb Natapovedba23e2010-07-07 20:16:45 +0300365int is_fault_pfn(pfn_t pfn);
Xiao Guangrongfce92dc2011-07-12 03:28:54 +0800366int is_noslot_pfn(pfn_t pfn);
367int is_invalid_pfn(pfn_t pfn);
Izik Eidusf9d46eb2007-11-11 22:02:22 +0200368int kvm_is_error_hva(unsigned long addr);
Izik Eidus210c7c42007-10-24 23:52:57 +0200369int kvm_set_memory_region(struct kvm *kvm,
370 struct kvm_userspace_memory_region *mem,
371 int user_alloc);
Sheng Yangf78e0e22007-10-29 09:40:42 +0800372int __kvm_set_memory_region(struct kvm *kvm,
373 struct kvm_userspace_memory_region *mem,
374 int user_alloc);
Takuya Yoshikawadb3fe4e2012-02-08 13:02:18 +0900375void kvm_arch_free_memslot(struct kvm_memory_slot *free,
376 struct kvm_memory_slot *dont);
377int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages);
Marcelo Tosattif7784b82009-12-23 14:35:18 -0200378int kvm_arch_prepare_memory_region(struct kvm *kvm,
379 struct kvm_memory_slot *memslot,
380 struct kvm_memory_slot old,
381 struct kvm_userspace_memory_region *mem,
382 int user_alloc);
383void kvm_arch_commit_memory_region(struct kvm *kvm,
Zhang Xiantao0de10342007-11-20 16:25:04 +0800384 struct kvm_userspace_memory_region *mem,
385 struct kvm_memory_slot old,
386 int user_alloc);
Takuya Yoshikawadb3fe4e2012-02-08 13:02:18 +0900387bool kvm_largepages_enabled(void);
Marcelo Tosatti54dee992009-06-11 12:07:44 -0300388void kvm_disable_largepages(void);
Marcelo Tosatti34d4cb82008-07-10 20:49:31 -0300389void kvm_arch_flush_shadow(struct kvm *kvm);
Marcelo Tosattia983fb22009-12-23 14:35:23 -0200390
Xiao Guangrong48987782010-08-22 19:11:43 +0800391int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages,
392 int nr_pages);
393
Avi Kivity954bbbc22007-03-30 14:02:32 +0300394struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn);
Marcelo Tosatti05da4552008-02-23 11:44:30 -0300395unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn);
Izik Eidusb4231d62007-11-20 11:49:33 +0200396void kvm_release_page_clean(struct page *page);
397void kvm_release_page_dirty(struct page *page);
Anthony Liguori35149e22008-04-02 14:46:56 -0500398void kvm_set_page_dirty(struct page *page);
399void kvm_set_page_accessed(struct page *page);
400
Xiao Guangrong887c08a2010-08-22 19:10:28 +0800401pfn_t hva_to_pfn_atomic(struct kvm *kvm, unsigned long addr);
Xiao Guangrong365fb3f2010-08-28 19:24:13 +0800402pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn);
Marcelo Tosatti612819c2010-10-22 14:18:18 -0200403pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async,
404 bool write_fault, bool *writable);
Anthony Liguori35149e22008-04-02 14:46:56 -0500405pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn);
Marcelo Tosatti612819c2010-10-22 14:18:18 -0200406pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault,
407 bool *writable);
Marcelo Tosatti506f0d62009-12-23 14:35:19 -0200408pfn_t gfn_to_pfn_memslot(struct kvm *kvm,
409 struct kvm_memory_slot *slot, gfn_t gfn);
Anthony Liguori35149e22008-04-02 14:46:56 -0500410void kvm_release_pfn_dirty(pfn_t);
411void kvm_release_pfn_clean(pfn_t pfn);
412void kvm_set_pfn_dirty(pfn_t pfn);
413void kvm_set_pfn_accessed(pfn_t pfn);
414void kvm_get_pfn(pfn_t pfn);
415
Izik Eidus195aefd2007-10-01 22:14:18 +0200416int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset,
417 int len);
Marcelo Tosatti7ec54582007-12-20 19:18:23 -0500418int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data,
419 unsigned long len);
Izik Eidus195aefd2007-10-01 22:14:18 +0200420int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len);
Gleb Natapove03b6442011-07-11 15:28:11 -0400421int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
422 void *data, unsigned long len);
Izik Eidus195aefd2007-10-01 22:14:18 +0200423int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data,
424 int offset, int len);
425int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data,
426 unsigned long len);
Gleb Natapov49c77542010-10-18 15:22:23 +0200427int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
428 void *data, unsigned long len);
429int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc,
430 gpa_t gpa);
Izik Eidus195aefd2007-10-01 22:14:18 +0200431int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len);
432int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800433struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn);
Izik Eiduse0d62c72007-10-24 23:57:46 +0200434int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn);
Joerg Roedel8f0b1ab2010-01-28 12:37:56 +0100435unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800436void mark_page_dirty(struct kvm *kvm, gfn_t gfn);
Gleb Natapov49c77542010-10-18 15:22:23 +0200437void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot,
438 gfn_t gfn);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800439
Hollis Blanchard8776e512007-10-31 17:24:24 -0500440void kvm_vcpu_block(struct kvm_vcpu *vcpu);
Zhai, Edwind255f4f2009-10-09 18:03:20 +0800441void kvm_vcpu_on_spin(struct kvm_vcpu *vcpu);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800442void kvm_resched(struct kvm_vcpu *vcpu);
Avi Kivity7702fd12007-06-14 16:27:40 +0300443void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
444void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
Xiao Guangronga4ee1ca2010-11-23 11:13:00 +0800445
Avi Kivityd9e368d2007-06-07 19:18:30 +0300446void kvm_flush_remote_tlbs(struct kvm *kvm);
Marcelo Tosatti2e53d632008-02-20 14:47:24 -0500447void kvm_reload_remote_mmus(struct kvm *kvm);
Avi Kivity6aa8b732006-12-10 02:21:36 -0800448
Carsten Otte043405e2007-10-10 17:16:19 +0200449long kvm_arch_dev_ioctl(struct file *filp,
450 unsigned int ioctl, unsigned long arg);
Carsten Otte313a3dc2007-10-11 19:16:52 +0200451long kvm_arch_vcpu_ioctl(struct file *filp,
452 unsigned int ioctl, unsigned long arg);
Carsten Otte5b1c1492012-01-04 10:25:23 +0100453int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf);
Zhang Xiantao018d00d2007-11-15 23:07:47 +0800454
455int kvm_dev_ioctl_check_extension(long ext);
456
Zhang Xiantao5bb064d2007-11-18 20:29:43 +0800457int kvm_get_dirty_log(struct kvm *kvm,
458 struct kvm_dirty_log *log, int *is_dirty);
459int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
460 struct kvm_dirty_log *log);
461
Carsten Otte1fe779f2007-10-29 16:08:35 +0100462int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
463 struct
464 kvm_userspace_memory_region *mem,
465 int user_alloc);
466long kvm_arch_vm_ioctl(struct file *filp,
467 unsigned int ioctl, unsigned long arg);
Carsten Otte313a3dc2007-10-11 19:16:52 +0200468
Hollis Blanchardd0752062007-10-31 17:24:25 -0500469int kvm_arch_vcpu_ioctl_get_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
470int kvm_arch_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu);
471
Zhang Xiantao8b006792007-11-16 13:05:55 +0800472int kvm_arch_vcpu_ioctl_translate(struct kvm_vcpu *vcpu,
473 struct kvm_translation *tr);
474
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -0500475int kvm_arch_vcpu_ioctl_get_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
476int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs);
477int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
478 struct kvm_sregs *sregs);
479int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
480 struct kvm_sregs *sregs);
Marcelo Tosatti62d9f0d2008-04-11 13:24:45 -0300481int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
482 struct kvm_mp_state *mp_state);
483int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
484 struct kvm_mp_state *mp_state);
Jan Kiszkad0bfb942008-12-15 13:52:10 +0100485int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
486 struct kvm_guest_debug *dbg);
Hollis Blanchardb6c7a5d2007-11-01 14:16:10 -0500487int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run);
488
Zhang Xiantaof8c16bb2007-11-14 20:40:21 +0800489int kvm_arch_init(void *opaque);
490void kvm_arch_exit(void);
Carsten Otte043405e2007-10-10 17:16:19 +0200491
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +0800492int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
493void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
494
495void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
496void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
497void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
498struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
Avi Kivity26e52152007-11-20 15:30:24 +0200499int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu);
Hollis Blanchardd40ccc62007-11-19 14:04:43 -0600500void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +0800501
502int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
Alexander Graf10474ae2009-09-15 11:37:46 +0200503int kvm_arch_hardware_enable(void *garbage);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +0800504void kvm_arch_hardware_disable(void *garbage);
505int kvm_arch_hardware_setup(void);
506void kvm_arch_hardware_unsetup(void);
507void kvm_arch_check_processor_compat(void *rtn);
Zhang Xiantao1d737c82007-12-14 09:35:10 +0800508int kvm_arch_vcpu_runnable(struct kvm_vcpu *vcpu);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +0800509
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +0800510void kvm_free_physmem(struct kvm *kvm);
511
Jan Kiszkad89f5ef2010-11-09 17:02:49 +0100512#ifndef __KVM_HAVE_ARCH_VM_ALLOC
513static inline struct kvm *kvm_arch_alloc_vm(void)
514{
515 return kzalloc(sizeof(struct kvm), GFP_KERNEL);
516}
517
518static inline void kvm_arch_free_vm(struct kvm *kvm)
519{
520 kfree(kvm);
521}
522#endif
523
Carsten Ottee08b9632012-01-04 10:25:20 +0100524int kvm_arch_init_vm(struct kvm *kvm, unsigned long type);
Zhang Xiantaod19a9cd2007-11-18 18:43:45 +0800525void kvm_arch_destroy_vm(struct kvm *kvm);
Xiantao Zhang8a98f662008-10-06 13:47:38 +0800526void kvm_free_all_assigned_devices(struct kvm *kvm);
Sheng Yangad8ba2c2009-01-06 10:03:02 +0800527void kvm_arch_sync_events(struct kvm *kvm);
Zhang Xiantaoe9b11c12007-11-14 20:38:21 +0800528
Marcelo Tosatti3d808402008-04-11 14:53:26 -0300529int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
Zhang Xiantao57361992007-12-17 14:21:40 +0800530void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
Zhang Xiantao682c59a2007-12-11 20:36:00 +0800531
Xiantao Zhangc77fb9d2008-09-27 10:55:40 +0800532int kvm_is_mmio_pfn(pfn_t pfn);
533
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +0300534struct kvm_irq_ack_notifier {
535 struct hlist_node link;
536 unsigned gsi;
537 void (*irq_acked)(struct kvm_irq_ack_notifier *kian);
538};
539
540struct kvm_assigned_dev_kernel {
541 struct kvm_irq_ack_notifier ack_notifier;
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +0300542 struct list_head list;
543 int assigned_dev_id;
Zhai, Edwinab9f4ec2010-01-29 14:38:44 +0800544 int host_segnr;
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +0300545 int host_busnr;
546 int host_devfn;
Sheng Yangc1e01512009-02-25 17:22:26 +0800547 unsigned int entries_nr;
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +0300548 int host_irq;
Mark McLoughlindefaf152008-12-02 12:16:33 +0000549 bool host_irq_disabled;
Jan Kiszka07700a92012-02-28 14:19:54 +0100550 bool pci_2_3;
Sheng Yangc1e01512009-02-25 17:22:26 +0800551 struct msix_entry *host_msix_entries;
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +0300552 int guest_irq;
Jan Kiszka06452112010-11-16 22:30:03 +0100553 struct msix_entry *guest_msix_entries;
Sheng Yang4f906c12008-11-24 14:32:51 +0800554 unsigned long irq_requested_type;
Sheng Yang5550af42008-10-15 20:15:06 +0800555 int irq_source_id;
Weidong Hanb6535742008-12-08 23:29:53 +0800556 int flags;
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +0300557 struct pci_dev *dev;
558 struct kvm *kvm;
Jan Kiszka06452112010-11-16 22:30:03 +0100559 spinlock_t intx_lock;
Jan Kiszkacf9eeac2012-03-14 11:02:11 +0100560 spinlock_t intx_mask_lock;
Jan Kiszka1e001d42010-11-16 22:30:04 +0100561 char irq_name[32];
Alex Williamsonf8fcfd72011-05-10 10:02:39 -0600562 struct pci_saved_state *pci_saved_state;
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +0300563};
Avi Kivity75858a82009-01-04 17:10:50 +0200564
565struct kvm_irq_mask_notifier {
566 void (*func)(struct kvm_irq_mask_notifier *kimn, bool masked);
567 int irq;
568 struct hlist_node link;
569};
570
571void kvm_register_irq_mask_notifier(struct kvm *kvm, int irq,
572 struct kvm_irq_mask_notifier *kimn);
573void kvm_unregister_irq_mask_notifier(struct kvm *kvm, int irq,
574 struct kvm_irq_mask_notifier *kimn);
Gleb Natapov4a994352010-07-11 15:32:23 +0300575void kvm_fire_mask_notifiers(struct kvm *kvm, unsigned irqchip, unsigned pin,
576 bool mask);
Avi Kivity75858a82009-01-04 17:10:50 +0200577
Gleb Natapov46e624b2009-08-24 11:54:20 +0300578#ifdef __KVM_HAVE_IOAPIC
579void kvm_get_intr_delivery_bitmask(struct kvm_ioapic *ioapic,
580 union kvm_ioapic_redirect_entry *entry,
581 unsigned long *deliver_bitmask);
582#endif
583int kvm_set_irq(struct kvm *kvm, int irq_source_id, u32 irq, int level);
Michael S. Tsirkinbd2b53b2010-11-18 19:09:08 +0200584int kvm_set_msi(struct kvm_kernel_irq_routing_entry *irq_entry, struct kvm *kvm,
585 int irq_source_id, int level);
Marcelo Tosatti44882ee2009-01-27 15:12:38 -0200586void kvm_notify_acked_irq(struct kvm *kvm, unsigned irqchip, unsigned pin);
Xiantao Zhang3de42dc2008-10-06 13:48:45 +0800587void kvm_register_irq_ack_notifier(struct kvm *kvm,
588 struct kvm_irq_ack_notifier *kian);
Marcelo Tosattifa40a822009-06-04 15:08:24 -0300589void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
590 struct kvm_irq_ack_notifier *kian);
Sheng Yang5550af42008-10-15 20:15:06 +0800591int kvm_request_irq_source_id(struct kvm *kvm);
592void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id);
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +0300593
Sheng Yang522c68c2009-04-27 20:35:43 +0800594/* For vcpu->arch.iommu_flags */
595#define KVM_IOMMU_CACHE_COHERENCY 0x1
596
Joerg Roedel19de40a2008-12-03 14:43:34 +0100597#ifdef CONFIG_IOMMU_API
Marcelo Tosatti3ad26d82009-12-23 14:35:20 -0200598int kvm_iommu_map_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
Alex Williamson32f6daa2012-04-11 09:51:49 -0600599void kvm_iommu_unmap_pages(struct kvm *kvm, struct kvm_memory_slot *slot);
Weidong Han260782b2008-12-02 21:03:39 +0800600int kvm_iommu_map_guest(struct kvm *kvm);
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +0300601int kvm_iommu_unmap_guest(struct kvm *kvm);
Weidong Han260782b2008-12-02 21:03:39 +0800602int kvm_assign_device(struct kvm *kvm,
603 struct kvm_assigned_dev_kernel *assigned_dev);
Weidong Han0a920352008-12-02 21:24:23 +0800604int kvm_deassign_device(struct kvm *kvm,
605 struct kvm_assigned_dev_kernel *assigned_dev);
Joerg Roedel19de40a2008-12-03 14:43:34 +0100606#else /* CONFIG_IOMMU_API */
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +0300607static inline int kvm_iommu_map_pages(struct kvm *kvm,
Jan Kiszkad7a79b62010-10-14 13:59:04 +0200608 struct kvm_memory_slot *slot)
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +0300609{
610 return 0;
611}
612
Alex Williamson32f6daa2012-04-11 09:51:49 -0600613static inline void kvm_iommu_unmap_pages(struct kvm *kvm,
614 struct kvm_memory_slot *slot)
615{
616}
617
Weidong Han260782b2008-12-02 21:03:39 +0800618static inline int kvm_iommu_map_guest(struct kvm *kvm)
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +0300619{
620 return -ENODEV;
621}
622
623static inline int kvm_iommu_unmap_guest(struct kvm *kvm)
624{
625 return 0;
626}
Weidong Han260782b2008-12-02 21:03:39 +0800627
628static inline int kvm_assign_device(struct kvm *kvm,
629 struct kvm_assigned_dev_kernel *assigned_dev)
630{
631 return 0;
632}
Weidong Han0a920352008-12-02 21:24:23 +0800633
634static inline int kvm_deassign_device(struct kvm *kvm,
635 struct kvm_assigned_dev_kernel *assigned_dev)
636{
637 return 0;
638}
Joerg Roedel19de40a2008-12-03 14:43:34 +0100639#endif /* CONFIG_IOMMU_API */
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +0300640
Laurent Vivierd172fcd2007-10-15 17:00:19 +0200641static inline void kvm_guest_enter(void)
642{
Gleb Natapov8fa22062011-05-04 16:31:04 +0300643 BUG_ON(preemptible());
Christian Borntraegere56a7a22007-10-18 14:39:10 +0200644 account_system_vtime(current);
Laurent Vivierd172fcd2007-10-15 17:00:19 +0200645 current->flags |= PF_VCPU;
Gleb Natapov8fa22062011-05-04 16:31:04 +0300646 /* KVM does not hold any references to rcu protected data when it
647 * switches CPU into a guest mode. In fact switching to a guest mode
648 * is very similar to exiting to userspase from rcu point of view. In
649 * addition CPU may stay in a guest mode for quite a long time (up to
650 * one time slice). Lets treat guest mode as quiescent state, just like
651 * we do with user-mode execution.
652 */
653 rcu_virt_note_context_switch(smp_processor_id());
Laurent Vivierd172fcd2007-10-15 17:00:19 +0200654}
655
656static inline void kvm_guest_exit(void)
657{
Christian Borntraegere56a7a22007-10-18 14:39:10 +0200658 account_system_vtime(current);
Laurent Vivierd172fcd2007-10-15 17:00:19 +0200659 current->flags &= ~PF_VCPU;
660}
661
Paul Mackerras9d4cba72012-01-12 20:09:51 +0000662/*
663 * search_memslots() and __gfn_to_memslot() are here because they are
664 * used in non-modular code in arch/powerpc/kvm/book3s_hv_rm_mmu.c.
665 * gfn_to_memslot() itself isn't here as an inline because that would
666 * bloat other code too much.
667 */
668static inline struct kvm_memory_slot *
669search_memslots(struct kvm_memslots *slots, gfn_t gfn)
670{
671 struct kvm_memory_slot *memslot;
672
673 kvm_for_each_memslot(memslot, slots)
674 if (gfn >= memslot->base_gfn &&
675 gfn < memslot->base_gfn + memslot->npages)
676 return memslot;
677
678 return NULL;
679}
680
681static inline struct kvm_memory_slot *
682__gfn_to_memslot(struct kvm_memslots *slots, gfn_t gfn)
683{
684 return search_memslots(slots, gfn);
685}
686
Xiao Guangrong0ee8dcb2011-03-09 15:41:59 +0800687static inline int memslot_id(struct kvm *kvm, gfn_t gfn)
688{
689 return gfn_to_memslot(kvm, gfn)->id;
690}
691
Takuya Yoshikawafb03cb62012-02-08 12:59:10 +0900692static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level)
693{
694 /* KVM_HPAGE_GFN_SHIFT(PT_PAGE_TABLE_LEVEL) must be 0. */
695 return (gfn >> KVM_HPAGE_GFN_SHIFT(level)) -
696 (base_gfn >> KVM_HPAGE_GFN_SHIFT(level));
697}
698
Xiao Guangrong887c08a2010-08-22 19:10:28 +0800699static inline unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot,
700 gfn_t gfn)
701{
702 return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE;
703}
704
Avi Kivity1755fbc2007-11-21 14:44:45 +0200705static inline gpa_t gfn_to_gpa(gfn_t gfn)
706{
707 return (gpa_t)gfn << PAGE_SHIFT;
708}
Avi Kivity6aa8b732006-12-10 02:21:36 -0800709
Joerg Roedelc30a3582010-09-10 17:30:48 +0200710static inline gfn_t gpa_to_gfn(gpa_t gpa)
711{
712 return (gfn_t)(gpa >> PAGE_SHIFT);
713}
714
Ben-Ami Yassour62c476c2008-09-14 03:48:28 +0300715static inline hpa_t pfn_to_hpa(pfn_t pfn)
716{
717 return (hpa_t)pfn << PAGE_SHIFT;
718}
719
Marcelo Tosatti2f599712008-05-27 12:10:20 -0300720static inline void kvm_migrate_timers(struct kvm_vcpu *vcpu)
Avi Kivity2f52d582008-01-16 12:49:30 +0200721{
722 set_bit(KVM_REQ_MIGRATE_TIMER, &vcpu->requests);
723}
724
Avi Kivityba1389b2007-11-18 16:24:12 +0200725enum kvm_stat_kind {
726 KVM_STAT_VM,
727 KVM_STAT_VCPU,
728};
729
Hollis Blanchard417bc302007-10-31 17:24:23 -0500730struct kvm_stats_debugfs_item {
731 const char *name;
732 int offset;
Avi Kivityba1389b2007-11-18 16:24:12 +0200733 enum kvm_stat_kind kind;
Hollis Blanchard417bc302007-10-31 17:24:23 -0500734 struct dentry *dentry;
735};
736extern struct kvm_stats_debugfs_item debugfs_entries[];
Hollis Blanchard76f7c872008-04-15 16:05:42 -0500737extern struct dentry *kvm_debugfs_dir;
Feng(Eric) Liud4c9ff22008-04-10 08:47:53 -0400738
Andrea Arcangelie930bff2008-07-25 16:24:52 +0200739#ifdef KVM_ARCH_WANT_MMU_NOTIFIER
740static inline int mmu_notifier_retry(struct kvm_vcpu *vcpu, unsigned long mmu_seq)
741{
742 if (unlikely(vcpu->kvm->mmu_notifier_count))
743 return 1;
744 /*
Paul Mackerrasa355aa52011-12-12 12:37:21 +0000745 * Ensure the read of mmu_notifier_count happens before the read
746 * of mmu_notifier_seq. This interacts with the smp_wmb() in
747 * mmu_notifier_invalidate_range_end to make sure that the caller
748 * either sees the old (non-zero) value of mmu_notifier_count or
749 * the new (incremented) value of mmu_notifier_seq.
750 * PowerPC Book3s HV KVM calls this under a per-page lock
751 * rather than under kvm->mmu_lock, for scalability, so
752 * can't rely on kvm->mmu_lock to keep things ordered.
Andrea Arcangelie930bff2008-07-25 16:24:52 +0200753 */
Paul Mackerrasa355aa52011-12-12 12:37:21 +0000754 smp_rmb();
Andrea Arcangelie930bff2008-07-25 16:24:52 +0200755 if (vcpu->kvm->mmu_notifier_seq != mmu_seq)
756 return 1;
757 return 0;
758}
759#endif
760
Avi Kivity399ec802008-11-19 13:58:46 +0200761#ifdef CONFIG_HAVE_KVM_IRQCHIP
762
763#define KVM_MAX_IRQ_ROUTES 1024
764
765int kvm_setup_default_irq_routing(struct kvm *kvm);
766int kvm_set_irq_routing(struct kvm *kvm,
767 const struct kvm_irq_routing_entry *entries,
768 unsigned nr,
769 unsigned flags);
770void kvm_free_irq_routing(struct kvm *kvm);
771
772#else
773
774static inline void kvm_free_irq_routing(struct kvm *kvm) {}
775
776#endif
777
Gregory Haskins721eecb2009-05-20 10:30:49 -0400778#ifdef CONFIG_HAVE_KVM_EVENTFD
779
Gregory Haskinsd34e6b12009-07-07 17:08:49 -0400780void kvm_eventfd_init(struct kvm *kvm);
Gregory Haskins721eecb2009-05-20 10:30:49 -0400781int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags);
782void kvm_irqfd_release(struct kvm *kvm);
Michael S. Tsirkinbd2b53b2010-11-18 19:09:08 +0200783void kvm_irq_routing_update(struct kvm *, struct kvm_irq_routing_table *);
Gregory Haskinsd34e6b12009-07-07 17:08:49 -0400784int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
Gregory Haskins721eecb2009-05-20 10:30:49 -0400785
786#else
787
Gregory Haskinsd34e6b12009-07-07 17:08:49 -0400788static inline void kvm_eventfd_init(struct kvm *kvm) {}
Michael S. Tsirkinbd2b53b2010-11-18 19:09:08 +0200789
Gregory Haskins721eecb2009-05-20 10:30:49 -0400790static inline int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags)
791{
792 return -EINVAL;
793}
794
795static inline void kvm_irqfd_release(struct kvm *kvm) {}
Michael S. Tsirkinbd2b53b2010-11-18 19:09:08 +0200796
Alexander Graf27923eb2010-11-25 10:25:44 +0100797#ifdef CONFIG_HAVE_KVM_IRQCHIP
Michael S. Tsirkinbd2b53b2010-11-18 19:09:08 +0200798static inline void kvm_irq_routing_update(struct kvm *kvm,
799 struct kvm_irq_routing_table *irq_rt)
800{
801 rcu_assign_pointer(kvm->irq_routing, irq_rt);
802}
Alexander Graf27923eb2010-11-25 10:25:44 +0100803#endif
Michael S. Tsirkinbd2b53b2010-11-18 19:09:08 +0200804
Gregory Haskinsd34e6b12009-07-07 17:08:49 -0400805static inline int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args)
806{
807 return -ENOSYS;
808}
Gregory Haskins721eecb2009-05-20 10:30:49 -0400809
810#endif /* CONFIG_HAVE_KVM_EVENTFD */
811
Gleb Natapov73880c82009-06-09 15:56:28 +0300812#ifdef CONFIG_KVM_APIC_ARCHITECTURE
Gleb Natapovc5af89b2009-06-09 15:56:26 +0300813static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
814{
Marcelo Tosattid3efc8e2009-06-17 10:07:59 -0300815 return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
Gleb Natapovc5af89b2009-06-09 15:56:26 +0300816}
Avi Kivity3e515702012-03-05 14:23:29 +0200817
818bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu);
819
820#else
821
822static inline bool kvm_vcpu_compatible(struct kvm_vcpu *vcpu) { return true; }
823
Avi Kivity6aa8b732006-12-10 02:21:36 -0800824#endif
Avi Kivitybfd99ff2009-08-26 14:57:50 +0300825
826#ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
827
828long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
829 unsigned long arg);
830
831#else
832
833static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
834 unsigned long arg)
835{
836 return -ENOTTY;
837}
838
Gleb Natapov73880c82009-06-09 15:56:28 +0300839#endif
Avi Kivitybfd99ff2009-08-26 14:57:50 +0300840
Avi Kivitya8eeb042010-05-10 12:34:53 +0300841static inline void kvm_make_request(int req, struct kvm_vcpu *vcpu)
842{
843 set_bit(req, &vcpu->requests);
844}
845
Avi Kivitya8eeb042010-05-10 12:34:53 +0300846static inline bool kvm_check_request(int req, struct kvm_vcpu *vcpu)
847{
Avi Kivity07198372010-05-10 13:08:26 +0300848 if (test_bit(req, &vcpu->requests)) {
849 clear_bit(req, &vcpu->requests);
850 return true;
851 } else {
852 return false;
853 }
Avi Kivitya8eeb042010-05-10 12:34:53 +0300854}
855
Avi Kivitybfd99ff2009-08-26 14:57:50 +0300856#endif
857