Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Kernel-based Virtual Machine driver for Linux |
| 3 | * |
| 4 | * This module enables machines with Intel VT-x extensions to run virtual |
| 5 | * machines without emulation or binary translation. |
| 6 | * |
| 7 | * Copyright (C) 2006 Qumranet, Inc. |
Nicolas Kaiser | 9611c18 | 2010-10-06 14:23:22 +0200 | [diff] [blame] | 8 | * Copyright 2010 Red Hat, Inc. and/or its affiliates. |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 9 | * |
| 10 | * Authors: |
| 11 | * Avi Kivity <avi@qumranet.com> |
| 12 | * Yaniv Kamay <yaniv@qumranet.com> |
| 13 | * |
| 14 | * This work is licensed under the terms of the GNU GPL, version 2. See |
| 15 | * the COPYING file in the top-level directory. |
| 16 | * |
| 17 | */ |
| 18 | |
Hollis Blanchard | e217402 | 2007-12-03 15:30:24 -0600 | [diff] [blame] | 19 | #include "iodev.h" |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 20 | |
Avi Kivity | edf8841 | 2007-12-16 11:02:48 +0200 | [diff] [blame] | 21 | #include <linux/kvm_host.h> |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 22 | #include <linux/kvm.h> |
| 23 | #include <linux/module.h> |
| 24 | #include <linux/errno.h> |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 25 | #include <linux/percpu.h> |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 26 | #include <linux/mm.h> |
| 27 | #include <linux/miscdevice.h> |
| 28 | #include <linux/vmalloc.h> |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 29 | #include <linux/reboot.h> |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 30 | #include <linux/debugfs.h> |
| 31 | #include <linux/highmem.h> |
| 32 | #include <linux/file.h> |
Rafael J. Wysocki | fb3600c | 2011-03-23 22:16:23 +0100 | [diff] [blame] | 33 | #include <linux/syscore_ops.h> |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 34 | #include <linux/cpu.h> |
Alexey Dobriyan | e8edc6e | 2007-05-21 01:22:52 +0400 | [diff] [blame] | 35 | #include <linux/sched.h> |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 36 | #include <linux/cpumask.h> |
| 37 | #include <linux/smp.h> |
Avi Kivity | d6d2816 | 2007-06-28 08:38:16 -0400 | [diff] [blame] | 38 | #include <linux/anon_inodes.h> |
Avi Kivity | 04d2cc7 | 2007-09-10 18:10:54 +0300 | [diff] [blame] | 39 | #include <linux/profile.h> |
Anthony Liguori | 7aa81cc | 2007-09-17 14:57:50 -0500 | [diff] [blame] | 40 | #include <linux/kvm_para.h> |
Izik Eidus | 6fc138d | 2007-10-09 19:20:39 +0200 | [diff] [blame] | 41 | #include <linux/pagemap.h> |
Anthony Liguori | 8d4e128 | 2007-10-18 09:59:34 -0500 | [diff] [blame] | 42 | #include <linux/mman.h> |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 43 | #include <linux/swap.h> |
Sheng Yang | e56d532 | 2009-03-12 21:45:39 +0800 | [diff] [blame] | 44 | #include <linux/bitops.h> |
Marcelo Tosatti | 547de29 | 2009-05-07 17:55:13 -0300 | [diff] [blame] | 45 | #include <linux/spinlock.h> |
Arnd Bergmann | 6ff5894 | 2009-10-22 14:19:27 +0200 | [diff] [blame] | 46 | #include <linux/compat.h> |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 47 | #include <linux/srcu.h> |
Joerg Roedel | 8f0b1ab | 2010-01-28 12:37:56 +0100 | [diff] [blame] | 48 | #include <linux/hugetlb.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 49 | #include <linux/slab.h> |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 50 | #include <linux/sort.h> |
| 51 | #include <linux/bsearch.h> |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 52 | |
Avi Kivity | e495606 | 2007-06-28 14:15:57 -0400 | [diff] [blame] | 53 | #include <asm/processor.h> |
Avi Kivity | e495606 | 2007-06-28 14:15:57 -0400 | [diff] [blame] | 54 | #include <asm/io.h> |
| 55 | #include <asm/uaccess.h> |
Izik Eidus | 3e021bf | 2007-11-19 11:16:57 +0200 | [diff] [blame] | 56 | #include <asm/pgtable.h> |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 57 | |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 58 | #include "coalesced_mmio.h" |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 59 | #include "async_pf.h" |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 60 | |
Marcelo Tosatti | 229456f | 2009-06-17 09:22:14 -0300 | [diff] [blame] | 61 | #define CREATE_TRACE_POINTS |
| 62 | #include <trace/events/kvm.h> |
| 63 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 64 | MODULE_AUTHOR("Qumranet"); |
| 65 | MODULE_LICENSE("GPL"); |
| 66 | |
Marcelo Tosatti | fa40a82 | 2009-06-04 15:08:24 -0300 | [diff] [blame] | 67 | /* |
| 68 | * Ordering of locks: |
| 69 | * |
Sheng Yang | fae3a35 | 2009-12-15 10:28:07 +0800 | [diff] [blame] | 70 | * kvm->lock --> kvm->slots_lock --> kvm->irq_lock |
Marcelo Tosatti | fa40a82 | 2009-06-04 15:08:24 -0300 | [diff] [blame] | 71 | */ |
| 72 | |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 73 | DEFINE_RAW_SPINLOCK(kvm_lock); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 74 | LIST_HEAD(vm_list); |
Avi Kivity | 133de90 | 2007-02-12 00:54:44 -0800 | [diff] [blame] | 75 | |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 76 | static cpumask_var_t cpus_hardware_enabled; |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 77 | static int kvm_usage_count = 0; |
| 78 | static atomic_t hardware_enable_failed; |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 79 | |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 80 | struct kmem_cache *kvm_vcpu_cache; |
| 81 | EXPORT_SYMBOL_GPL(kvm_vcpu_cache); |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 82 | |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 83 | static __read_mostly struct preempt_ops kvm_preempt_ops; |
| 84 | |
Hollis Blanchard | 76f7c87 | 2008-04-15 16:05:42 -0500 | [diff] [blame] | 85 | struct dentry *kvm_debugfs_dir; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 86 | |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 87 | static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl, |
| 88 | unsigned long arg); |
Alexander Graf | 1dda606 | 2011-06-08 02:45:37 +0200 | [diff] [blame] | 89 | #ifdef CONFIG_COMPAT |
| 90 | static long kvm_vcpu_compat_ioctl(struct file *file, unsigned int ioctl, |
| 91 | unsigned long arg); |
| 92 | #endif |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 93 | static int hardware_enable_all(void); |
| 94 | static void hardware_disable_all(void); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 95 | |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 96 | static void kvm_io_bus_destroy(struct kvm_io_bus *bus); |
| 97 | |
Avi Kivity | b7c4145 | 2010-12-02 17:52:50 +0200 | [diff] [blame] | 98 | bool kvm_rebooting; |
| 99 | EXPORT_SYMBOL_GPL(kvm_rebooting); |
Avi Kivity | 4ecac3f | 2008-05-13 13:23:38 +0300 | [diff] [blame] | 100 | |
Marcelo Tosatti | 54dee99 | 2009-06-11 12:07:44 -0300 | [diff] [blame] | 101 | static bool largepages_enabled = true; |
| 102 | |
Gleb Natapov | fa7bff8 | 2010-07-07 20:16:44 +0300 | [diff] [blame] | 103 | static struct page *hwpoison_page; |
| 104 | static pfn_t hwpoison_pfn; |
Huang Ying | bf99815 | 2010-05-31 14:28:19 +0800 | [diff] [blame] | 105 | |
Xiao Guangrong | fce92dc | 2011-07-12 03:28:54 +0800 | [diff] [blame] | 106 | struct page *fault_page; |
| 107 | pfn_t fault_pfn; |
Gleb Natapov | edba23e | 2010-07-07 20:16:45 +0300 | [diff] [blame] | 108 | |
Xiantao Zhang | c77fb9d | 2008-09-27 10:55:40 +0800 | [diff] [blame] | 109 | inline int kvm_is_mmio_pfn(pfn_t pfn) |
Ben-Ami Yassour | cbff90a | 2008-07-28 19:26:24 +0300 | [diff] [blame] | 110 | { |
Joerg Roedel | fc5659c | 2009-02-18 14:08:58 +0100 | [diff] [blame] | 111 | if (pfn_valid(pfn)) { |
Andrea Arcangeli | 22e5c47 | 2011-01-13 15:47:20 -0800 | [diff] [blame] | 112 | int reserved; |
Andrea Arcangeli | 936a5fe | 2011-01-13 15:46:48 -0800 | [diff] [blame] | 113 | struct page *tail = pfn_to_page(pfn); |
Andrea Arcangeli | 22e5c47 | 2011-01-13 15:47:20 -0800 | [diff] [blame] | 114 | struct page *head = compound_trans_head(tail); |
| 115 | reserved = PageReserved(head); |
Andrea Arcangeli | 936a5fe | 2011-01-13 15:46:48 -0800 | [diff] [blame] | 116 | if (head != tail) { |
Andrea Arcangeli | 936a5fe | 2011-01-13 15:46:48 -0800 | [diff] [blame] | 117 | /* |
Andrea Arcangeli | 22e5c47 | 2011-01-13 15:47:20 -0800 | [diff] [blame] | 118 | * "head" is not a dangling pointer |
| 119 | * (compound_trans_head takes care of that) |
| 120 | * but the hugepage may have been splitted |
| 121 | * from under us (and we may not hold a |
| 122 | * reference count on the head page so it can |
| 123 | * be reused before we run PageReferenced), so |
| 124 | * we've to check PageTail before returning |
| 125 | * what we just read. |
Andrea Arcangeli | 936a5fe | 2011-01-13 15:46:48 -0800 | [diff] [blame] | 126 | */ |
Andrea Arcangeli | 22e5c47 | 2011-01-13 15:47:20 -0800 | [diff] [blame] | 127 | smp_rmb(); |
| 128 | if (PageTail(tail)) |
| 129 | return reserved; |
Andrea Arcangeli | 936a5fe | 2011-01-13 15:46:48 -0800 | [diff] [blame] | 130 | } |
| 131 | return PageReserved(tail); |
Joerg Roedel | fc5659c | 2009-02-18 14:08:58 +0100 | [diff] [blame] | 132 | } |
Ben-Ami Yassour | cbff90a | 2008-07-28 19:26:24 +0300 | [diff] [blame] | 133 | |
| 134 | return true; |
| 135 | } |
| 136 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 137 | /* |
| 138 | * Switches to specified vcpu, until a matching vcpu_put() |
| 139 | */ |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 140 | void vcpu_load(struct kvm_vcpu *vcpu) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 141 | { |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 142 | int cpu; |
| 143 | |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 144 | mutex_lock(&vcpu->mutex); |
Rik van Riel | 34bb10b | 2011-02-01 09:52:41 -0500 | [diff] [blame] | 145 | if (unlikely(vcpu->pid != current->pids[PIDTYPE_PID].pid)) { |
| 146 | /* The thread running this VCPU changed. */ |
| 147 | struct pid *oldpid = vcpu->pid; |
| 148 | struct pid *newpid = get_task_pid(current, PIDTYPE_PID); |
| 149 | rcu_assign_pointer(vcpu->pid, newpid); |
| 150 | synchronize_rcu(); |
| 151 | put_pid(oldpid); |
| 152 | } |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 153 | cpu = get_cpu(); |
| 154 | preempt_notifier_register(&vcpu->preempt_notifier); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 155 | kvm_arch_vcpu_load(vcpu, cpu); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 156 | put_cpu(); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 157 | } |
| 158 | |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 159 | void vcpu_put(struct kvm_vcpu *vcpu) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 160 | { |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 161 | preempt_disable(); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 162 | kvm_arch_vcpu_put(vcpu); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 163 | preempt_notifier_unregister(&vcpu->preempt_notifier); |
| 164 | preempt_enable(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 165 | mutex_unlock(&vcpu->mutex); |
| 166 | } |
| 167 | |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 168 | static void ack_flush(void *_completed) |
| 169 | { |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 170 | } |
| 171 | |
Rusty Russell | 4984689 | 2008-12-08 20:26:24 +1030 | [diff] [blame] | 172 | static bool make_all_cpus_request(struct kvm *kvm, unsigned int req) |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 173 | { |
Avi Kivity | 597a5f5 | 2008-07-20 14:24:22 +0300 | [diff] [blame] | 174 | int i, cpu, me; |
Rusty Russell | 6ef7a1b | 2008-12-08 20:28:04 +1030 | [diff] [blame] | 175 | cpumask_var_t cpus; |
| 176 | bool called = true; |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 177 | struct kvm_vcpu *vcpu; |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 178 | |
Li Zefan | 79f5599 | 2009-06-15 14:58:26 +0800 | [diff] [blame] | 179 | zalloc_cpumask_var(&cpus, GFP_ATOMIC); |
Rusty Russell | 6ef7a1b | 2008-12-08 20:28:04 +1030 | [diff] [blame] | 180 | |
Xiao Guangrong | 3cba413 | 2011-01-12 15:41:22 +0800 | [diff] [blame] | 181 | me = get_cpu(); |
Gleb Natapov | 988a2ca | 2009-06-09 15:56:29 +0300 | [diff] [blame] | 182 | kvm_for_each_vcpu(i, vcpu, kvm) { |
Xiao Guangrong | 3cba413 | 2011-01-12 15:41:22 +0800 | [diff] [blame] | 183 | kvm_make_request(req, vcpu); |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 184 | cpu = vcpu->cpu; |
Xiao Guangrong | 6b7e2d0 | 2011-01-12 15:40:31 +0800 | [diff] [blame] | 185 | |
| 186 | /* Set ->requests bit before we read ->mode */ |
| 187 | smp_mb(); |
| 188 | |
| 189 | if (cpus != NULL && cpu != -1 && cpu != me && |
| 190 | kvm_vcpu_exiting_guest_mode(vcpu) != OUTSIDE_GUEST_MODE) |
Rusty Russell | 6ef7a1b | 2008-12-08 20:28:04 +1030 | [diff] [blame] | 191 | cpumask_set_cpu(cpu, cpus); |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 192 | } |
Rusty Russell | 6ef7a1b | 2008-12-08 20:28:04 +1030 | [diff] [blame] | 193 | if (unlikely(cpus == NULL)) |
| 194 | smp_call_function_many(cpu_online_mask, ack_flush, NULL, 1); |
| 195 | else if (!cpumask_empty(cpus)) |
| 196 | smp_call_function_many(cpus, ack_flush, NULL, 1); |
| 197 | else |
| 198 | called = false; |
Xiao Guangrong | 3cba413 | 2011-01-12 15:41:22 +0800 | [diff] [blame] | 199 | put_cpu(); |
Rusty Russell | 6ef7a1b | 2008-12-08 20:28:04 +1030 | [diff] [blame] | 200 | free_cpumask_var(cpus); |
Rusty Russell | 4984689 | 2008-12-08 20:26:24 +1030 | [diff] [blame] | 201 | return called; |
| 202 | } |
| 203 | |
| 204 | void kvm_flush_remote_tlbs(struct kvm *kvm) |
| 205 | { |
Alex Shi | bec87d6 | 2012-03-04 13:13:38 +0800 | [diff] [blame] | 206 | long dirty_count = kvm->tlbs_dirty; |
Xiao Guangrong | a4ee1ca | 2010-11-23 11:13:00 +0800 | [diff] [blame] | 207 | |
| 208 | smp_mb(); |
Rusty Russell | 4984689 | 2008-12-08 20:26:24 +1030 | [diff] [blame] | 209 | if (make_all_cpus_request(kvm, KVM_REQ_TLB_FLUSH)) |
| 210 | ++kvm->stat.remote_tlb_flush; |
Xiao Guangrong | a4ee1ca | 2010-11-23 11:13:00 +0800 | [diff] [blame] | 211 | cmpxchg(&kvm->tlbs_dirty, dirty_count, 0); |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 212 | } |
| 213 | |
Marcelo Tosatti | 2e53d63 | 2008-02-20 14:47:24 -0500 | [diff] [blame] | 214 | void kvm_reload_remote_mmus(struct kvm *kvm) |
| 215 | { |
Rusty Russell | 4984689 | 2008-12-08 20:26:24 +1030 | [diff] [blame] | 216 | make_all_cpus_request(kvm, KVM_REQ_MMU_RELOAD); |
Marcelo Tosatti | 2e53d63 | 2008-02-20 14:47:24 -0500 | [diff] [blame] | 217 | } |
| 218 | |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 219 | int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id) |
| 220 | { |
| 221 | struct page *page; |
| 222 | int r; |
| 223 | |
| 224 | mutex_init(&vcpu->mutex); |
| 225 | vcpu->cpu = -1; |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 226 | vcpu->kvm = kvm; |
| 227 | vcpu->vcpu_id = id; |
Rik van Riel | 34bb10b | 2011-02-01 09:52:41 -0500 | [diff] [blame] | 228 | vcpu->pid = NULL; |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 229 | init_waitqueue_head(&vcpu->wq); |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 230 | kvm_async_pf_vcpu_init(vcpu); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 231 | |
| 232 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); |
| 233 | if (!page) { |
| 234 | r = -ENOMEM; |
| 235 | goto fail; |
| 236 | } |
| 237 | vcpu->run = page_address(page); |
| 238 | |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 239 | r = kvm_arch_vcpu_init(vcpu); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 240 | if (r < 0) |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 241 | goto fail_free_run; |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 242 | return 0; |
| 243 | |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 244 | fail_free_run: |
| 245 | free_page((unsigned long)vcpu->run); |
| 246 | fail: |
Rusty Russell | 76fafa5 | 2007-10-08 10:50:48 +1000 | [diff] [blame] | 247 | return r; |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 248 | } |
| 249 | EXPORT_SYMBOL_GPL(kvm_vcpu_init); |
| 250 | |
| 251 | void kvm_vcpu_uninit(struct kvm_vcpu *vcpu) |
| 252 | { |
Rik van Riel | 34bb10b | 2011-02-01 09:52:41 -0500 | [diff] [blame] | 253 | put_pid(vcpu->pid); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 254 | kvm_arch_vcpu_uninit(vcpu); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 255 | free_page((unsigned long)vcpu->run); |
| 256 | } |
| 257 | EXPORT_SYMBOL_GPL(kvm_vcpu_uninit); |
| 258 | |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 259 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) |
| 260 | static inline struct kvm *mmu_notifier_to_kvm(struct mmu_notifier *mn) |
| 261 | { |
| 262 | return container_of(mn, struct kvm, mmu_notifier); |
| 263 | } |
| 264 | |
| 265 | static void kvm_mmu_notifier_invalidate_page(struct mmu_notifier *mn, |
| 266 | struct mm_struct *mm, |
| 267 | unsigned long address) |
| 268 | { |
| 269 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 270 | int need_tlb_flush, idx; |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 271 | |
| 272 | /* |
| 273 | * When ->invalidate_page runs, the linux pte has been zapped |
| 274 | * already but the page is still allocated until |
| 275 | * ->invalidate_page returns. So if we increase the sequence |
| 276 | * here the kvm page fault will notice if the spte can't be |
| 277 | * established because the page is going to be freed. If |
| 278 | * instead the kvm page fault establishes the spte before |
| 279 | * ->invalidate_page runs, kvm_unmap_hva will release it |
| 280 | * before returning. |
| 281 | * |
| 282 | * The sequence increase only need to be seen at spin_unlock |
| 283 | * time, and not at spin_lock time. |
| 284 | * |
| 285 | * Increasing the sequence after the spin_unlock would be |
| 286 | * unsafe because the kvm page fault could then establish the |
| 287 | * pte after kvm_unmap_hva returned, without noticing the page |
| 288 | * is going to be freed. |
| 289 | */ |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 290 | idx = srcu_read_lock(&kvm->srcu); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 291 | spin_lock(&kvm->mmu_lock); |
Takuya Yoshikawa | 565f3be | 2012-02-10 15:28:31 +0900 | [diff] [blame] | 292 | |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 293 | kvm->mmu_notifier_seq++; |
Xiao Guangrong | a4ee1ca | 2010-11-23 11:13:00 +0800 | [diff] [blame] | 294 | need_tlb_flush = kvm_unmap_hva(kvm, address) | kvm->tlbs_dirty; |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 295 | /* we've to flush the tlb before the pages can be freed */ |
| 296 | if (need_tlb_flush) |
| 297 | kvm_flush_remote_tlbs(kvm); |
| 298 | |
Takuya Yoshikawa | 565f3be | 2012-02-10 15:28:31 +0900 | [diff] [blame] | 299 | spin_unlock(&kvm->mmu_lock); |
| 300 | srcu_read_unlock(&kvm->srcu, idx); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 301 | } |
| 302 | |
Izik Eidus | 3da0dd4 | 2009-09-23 21:47:18 +0300 | [diff] [blame] | 303 | static void kvm_mmu_notifier_change_pte(struct mmu_notifier *mn, |
| 304 | struct mm_struct *mm, |
| 305 | unsigned long address, |
| 306 | pte_t pte) |
| 307 | { |
| 308 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 309 | int idx; |
Izik Eidus | 3da0dd4 | 2009-09-23 21:47:18 +0300 | [diff] [blame] | 310 | |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 311 | idx = srcu_read_lock(&kvm->srcu); |
Izik Eidus | 3da0dd4 | 2009-09-23 21:47:18 +0300 | [diff] [blame] | 312 | spin_lock(&kvm->mmu_lock); |
| 313 | kvm->mmu_notifier_seq++; |
| 314 | kvm_set_spte_hva(kvm, address, pte); |
| 315 | spin_unlock(&kvm->mmu_lock); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 316 | srcu_read_unlock(&kvm->srcu, idx); |
Izik Eidus | 3da0dd4 | 2009-09-23 21:47:18 +0300 | [diff] [blame] | 317 | } |
| 318 | |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 319 | static void kvm_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn, |
| 320 | struct mm_struct *mm, |
| 321 | unsigned long start, |
| 322 | unsigned long end) |
| 323 | { |
| 324 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 325 | int need_tlb_flush = 0, idx; |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 326 | |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 327 | idx = srcu_read_lock(&kvm->srcu); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 328 | spin_lock(&kvm->mmu_lock); |
| 329 | /* |
| 330 | * The count increase must become visible at unlock time as no |
| 331 | * spte can be established without taking the mmu_lock and |
| 332 | * count is also read inside the mmu_lock critical section. |
| 333 | */ |
| 334 | kvm->mmu_notifier_count++; |
| 335 | for (; start < end; start += PAGE_SIZE) |
| 336 | need_tlb_flush |= kvm_unmap_hva(kvm, start); |
Xiao Guangrong | a4ee1ca | 2010-11-23 11:13:00 +0800 | [diff] [blame] | 337 | need_tlb_flush |= kvm->tlbs_dirty; |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 338 | /* we've to flush the tlb before the pages can be freed */ |
| 339 | if (need_tlb_flush) |
| 340 | kvm_flush_remote_tlbs(kvm); |
Takuya Yoshikawa | 565f3be | 2012-02-10 15:28:31 +0900 | [diff] [blame] | 341 | |
| 342 | spin_unlock(&kvm->mmu_lock); |
| 343 | srcu_read_unlock(&kvm->srcu, idx); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 344 | } |
| 345 | |
| 346 | static void kvm_mmu_notifier_invalidate_range_end(struct mmu_notifier *mn, |
| 347 | struct mm_struct *mm, |
| 348 | unsigned long start, |
| 349 | unsigned long end) |
| 350 | { |
| 351 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
| 352 | |
| 353 | spin_lock(&kvm->mmu_lock); |
| 354 | /* |
| 355 | * This sequence increase will notify the kvm page fault that |
| 356 | * the page that is going to be mapped in the spte could have |
| 357 | * been freed. |
| 358 | */ |
| 359 | kvm->mmu_notifier_seq++; |
Paul Mackerras | a355aa5 | 2011-12-12 12:37:21 +0000 | [diff] [blame] | 360 | smp_wmb(); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 361 | /* |
| 362 | * The above sequence increase must be visible before the |
Paul Mackerras | a355aa5 | 2011-12-12 12:37:21 +0000 | [diff] [blame] | 363 | * below count decrease, which is ensured by the smp_wmb above |
| 364 | * in conjunction with the smp_rmb in mmu_notifier_retry(). |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 365 | */ |
| 366 | kvm->mmu_notifier_count--; |
| 367 | spin_unlock(&kvm->mmu_lock); |
| 368 | |
| 369 | BUG_ON(kvm->mmu_notifier_count < 0); |
| 370 | } |
| 371 | |
| 372 | static int kvm_mmu_notifier_clear_flush_young(struct mmu_notifier *mn, |
| 373 | struct mm_struct *mm, |
| 374 | unsigned long address) |
| 375 | { |
| 376 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 377 | int young, idx; |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 378 | |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 379 | idx = srcu_read_lock(&kvm->srcu); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 380 | spin_lock(&kvm->mmu_lock); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 381 | |
Takuya Yoshikawa | 565f3be | 2012-02-10 15:28:31 +0900 | [diff] [blame] | 382 | young = kvm_age_hva(kvm, address); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 383 | if (young) |
| 384 | kvm_flush_remote_tlbs(kvm); |
| 385 | |
Takuya Yoshikawa | 565f3be | 2012-02-10 15:28:31 +0900 | [diff] [blame] | 386 | spin_unlock(&kvm->mmu_lock); |
| 387 | srcu_read_unlock(&kvm->srcu, idx); |
| 388 | |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 389 | return young; |
| 390 | } |
| 391 | |
Andrea Arcangeli | 8ee5382 | 2011-01-13 15:47:10 -0800 | [diff] [blame] | 392 | static int kvm_mmu_notifier_test_young(struct mmu_notifier *mn, |
| 393 | struct mm_struct *mm, |
| 394 | unsigned long address) |
| 395 | { |
| 396 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
| 397 | int young, idx; |
| 398 | |
| 399 | idx = srcu_read_lock(&kvm->srcu); |
| 400 | spin_lock(&kvm->mmu_lock); |
| 401 | young = kvm_test_age_hva(kvm, address); |
| 402 | spin_unlock(&kvm->mmu_lock); |
| 403 | srcu_read_unlock(&kvm->srcu, idx); |
| 404 | |
| 405 | return young; |
| 406 | } |
| 407 | |
Marcelo Tosatti | 85db06e | 2008-12-10 21:23:26 +0100 | [diff] [blame] | 408 | static void kvm_mmu_notifier_release(struct mmu_notifier *mn, |
| 409 | struct mm_struct *mm) |
| 410 | { |
| 411 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
Lai Jiangshan | eda2bed | 2010-04-20 14:29:29 +0800 | [diff] [blame] | 412 | int idx; |
| 413 | |
| 414 | idx = srcu_read_lock(&kvm->srcu); |
Marcelo Tosatti | 85db06e | 2008-12-10 21:23:26 +0100 | [diff] [blame] | 415 | kvm_arch_flush_shadow(kvm); |
Lai Jiangshan | eda2bed | 2010-04-20 14:29:29 +0800 | [diff] [blame] | 416 | srcu_read_unlock(&kvm->srcu, idx); |
Marcelo Tosatti | 85db06e | 2008-12-10 21:23:26 +0100 | [diff] [blame] | 417 | } |
| 418 | |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 419 | static const struct mmu_notifier_ops kvm_mmu_notifier_ops = { |
| 420 | .invalidate_page = kvm_mmu_notifier_invalidate_page, |
| 421 | .invalidate_range_start = kvm_mmu_notifier_invalidate_range_start, |
| 422 | .invalidate_range_end = kvm_mmu_notifier_invalidate_range_end, |
| 423 | .clear_flush_young = kvm_mmu_notifier_clear_flush_young, |
Andrea Arcangeli | 8ee5382 | 2011-01-13 15:47:10 -0800 | [diff] [blame] | 424 | .test_young = kvm_mmu_notifier_test_young, |
Izik Eidus | 3da0dd4 | 2009-09-23 21:47:18 +0300 | [diff] [blame] | 425 | .change_pte = kvm_mmu_notifier_change_pte, |
Marcelo Tosatti | 85db06e | 2008-12-10 21:23:26 +0100 | [diff] [blame] | 426 | .release = kvm_mmu_notifier_release, |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 427 | }; |
Avi Kivity | 4c07b0a | 2009-12-20 14:54:04 +0200 | [diff] [blame] | 428 | |
| 429 | static int kvm_init_mmu_notifier(struct kvm *kvm) |
| 430 | { |
| 431 | kvm->mmu_notifier.ops = &kvm_mmu_notifier_ops; |
| 432 | return mmu_notifier_register(&kvm->mmu_notifier, current->mm); |
| 433 | } |
| 434 | |
| 435 | #else /* !(CONFIG_MMU_NOTIFIER && KVM_ARCH_WANT_MMU_NOTIFIER) */ |
| 436 | |
| 437 | static int kvm_init_mmu_notifier(struct kvm *kvm) |
| 438 | { |
| 439 | return 0; |
| 440 | } |
| 441 | |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 442 | #endif /* CONFIG_MMU_NOTIFIER && KVM_ARCH_WANT_MMU_NOTIFIER */ |
| 443 | |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 444 | static void kvm_init_memslots_id(struct kvm *kvm) |
| 445 | { |
| 446 | int i; |
| 447 | struct kvm_memslots *slots = kvm->memslots; |
| 448 | |
| 449 | for (i = 0; i < KVM_MEM_SLOTS_NUM; i++) |
Xiao Guangrong | f85e2cb | 2011-11-24 17:41:54 +0800 | [diff] [blame] | 450 | slots->id_to_index[i] = slots->memslots[i].id = i; |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 451 | } |
| 452 | |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 453 | static struct kvm *kvm_create_vm(unsigned long type) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 454 | { |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 455 | int r, i; |
| 456 | struct kvm *kvm = kvm_arch_alloc_vm(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 457 | |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 458 | if (!kvm) |
| 459 | return ERR_PTR(-ENOMEM); |
| 460 | |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 461 | r = kvm_arch_init_vm(kvm, type); |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 462 | if (r) |
| 463 | goto out_err_nodisable; |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 464 | |
| 465 | r = hardware_enable_all(); |
| 466 | if (r) |
| 467 | goto out_err_nodisable; |
| 468 | |
Avi Kivity | 75858a8 | 2009-01-04 17:10:50 +0200 | [diff] [blame] | 469 | #ifdef CONFIG_HAVE_KVM_IRQCHIP |
| 470 | INIT_HLIST_HEAD(&kvm->mask_notifier_list); |
Gleb Natapov | 136bdfe | 2009-08-24 11:54:23 +0300 | [diff] [blame] | 471 | INIT_HLIST_HEAD(&kvm->irq_ack_notifier_list); |
Avi Kivity | 75858a8 | 2009-01-04 17:10:50 +0200 | [diff] [blame] | 472 | #endif |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 473 | |
Marcelo Tosatti | 46a26bf | 2009-12-23 14:35:16 -0200 | [diff] [blame] | 474 | r = -ENOMEM; |
| 475 | kvm->memslots = kzalloc(sizeof(struct kvm_memslots), GFP_KERNEL); |
| 476 | if (!kvm->memslots) |
Jan Kiszka | 57e7fbe | 2010-11-09 12:42:12 +0100 | [diff] [blame] | 477 | goto out_err_nosrcu; |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 478 | kvm_init_memslots_id(kvm); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 479 | if (init_srcu_struct(&kvm->srcu)) |
Jan Kiszka | 57e7fbe | 2010-11-09 12:42:12 +0100 | [diff] [blame] | 480 | goto out_err_nosrcu; |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 481 | for (i = 0; i < KVM_NR_BUSES; i++) { |
| 482 | kvm->buses[i] = kzalloc(sizeof(struct kvm_io_bus), |
| 483 | GFP_KERNEL); |
Jan Kiszka | 57e7fbe | 2010-11-09 12:42:12 +0100 | [diff] [blame] | 484 | if (!kvm->buses[i]) |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 485 | goto out_err; |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 486 | } |
Mike Waychison | 74b5c5b | 2011-06-03 13:04:53 -0700 | [diff] [blame] | 487 | |
OGAWA Hirofumi | 85722cd | 2011-05-11 09:28:28 +0900 | [diff] [blame] | 488 | spin_lock_init(&kvm->mmu_lock); |
Avi Kivity | 6d4e4c4 | 2007-11-21 16:41:05 +0200 | [diff] [blame] | 489 | kvm->mm = current->mm; |
| 490 | atomic_inc(&kvm->mm->mm_count); |
Gregory Haskins | d34e6b1 | 2009-07-07 17:08:49 -0400 | [diff] [blame] | 491 | kvm_eventfd_init(kvm); |
Shaohua Li | 11ec280 | 2007-07-23 14:51:37 +0800 | [diff] [blame] | 492 | mutex_init(&kvm->lock); |
Marcelo Tosatti | 60eead7 | 2009-06-04 15:08:23 -0300 | [diff] [blame] | 493 | mutex_init(&kvm->irq_lock); |
Marcelo Tosatti | 79fac95 | 2009-12-23 14:35:26 -0200 | [diff] [blame] | 494 | mutex_init(&kvm->slots_lock); |
Izik Eidus | d39f13b | 2008-03-30 16:01:25 +0300 | [diff] [blame] | 495 | atomic_set(&kvm->users_count, 1); |
Mike Waychison | 74b5c5b | 2011-06-03 13:04:53 -0700 | [diff] [blame] | 496 | |
| 497 | r = kvm_init_mmu_notifier(kvm); |
| 498 | if (r) |
| 499 | goto out_err; |
| 500 | |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 501 | raw_spin_lock(&kvm_lock); |
Rusty Russell | 5e58cfe | 2007-07-23 17:08:21 +1000 | [diff] [blame] | 502 | list_add(&kvm->vm_list, &vm_list); |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 503 | raw_spin_unlock(&kvm_lock); |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 504 | |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 505 | return kvm; |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 506 | |
| 507 | out_err: |
Jan Kiszka | 57e7fbe | 2010-11-09 12:42:12 +0100 | [diff] [blame] | 508 | cleanup_srcu_struct(&kvm->srcu); |
| 509 | out_err_nosrcu: |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 510 | hardware_disable_all(); |
| 511 | out_err_nodisable: |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 512 | for (i = 0; i < KVM_NR_BUSES; i++) |
| 513 | kfree(kvm->buses[i]); |
Marcelo Tosatti | 46a26bf | 2009-12-23 14:35:16 -0200 | [diff] [blame] | 514 | kfree(kvm->memslots); |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 515 | kvm_arch_free_vm(kvm); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 516 | return ERR_PTR(r); |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 517 | } |
| 518 | |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 519 | static void kvm_destroy_dirty_bitmap(struct kvm_memory_slot *memslot) |
| 520 | { |
| 521 | if (!memslot->dirty_bitmap) |
| 522 | return; |
| 523 | |
Takuya Yoshikawa | 6f9e5c17 | 2010-11-01 14:36:09 +0900 | [diff] [blame] | 524 | if (2 * kvm_dirty_bitmap_bytes(memslot) > PAGE_SIZE) |
| 525 | vfree(memslot->dirty_bitmap_head); |
| 526 | else |
| 527 | kfree(memslot->dirty_bitmap_head); |
| 528 | |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 529 | memslot->dirty_bitmap = NULL; |
Takuya Yoshikawa | 515a012 | 2010-10-27 18:23:54 +0900 | [diff] [blame] | 530 | memslot->dirty_bitmap_head = NULL; |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 531 | } |
| 532 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 533 | /* |
| 534 | * Free any memory in @free but not in @dont. |
| 535 | */ |
| 536 | static void kvm_free_physmem_slot(struct kvm_memory_slot *free, |
| 537 | struct kvm_memory_slot *dont) |
| 538 | { |
Izik Eidus | 290fc38 | 2007-09-27 14:11:22 +0200 | [diff] [blame] | 539 | if (!dont || free->rmap != dont->rmap) |
| 540 | vfree(free->rmap); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 541 | |
| 542 | if (!dont || free->dirty_bitmap != dont->dirty_bitmap) |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 543 | kvm_destroy_dirty_bitmap(free); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 544 | |
Takuya Yoshikawa | db3fe4e | 2012-02-08 13:02:18 +0900 | [diff] [blame] | 545 | kvm_arch_free_memslot(free, dont); |
Marcelo Tosatti | 05da455 | 2008-02-23 11:44:30 -0300 | [diff] [blame] | 546 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 547 | free->npages = 0; |
Anthony Liguori | 8d4e128 | 2007-10-18 09:59:34 -0500 | [diff] [blame] | 548 | free->rmap = NULL; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 549 | } |
| 550 | |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 551 | void kvm_free_physmem(struct kvm *kvm) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 552 | { |
Marcelo Tosatti | 46a26bf | 2009-12-23 14:35:16 -0200 | [diff] [blame] | 553 | struct kvm_memslots *slots = kvm->memslots; |
Xiao Guangrong | be6ba0f | 2011-11-24 17:39:18 +0800 | [diff] [blame] | 554 | struct kvm_memory_slot *memslot; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 555 | |
Xiao Guangrong | be6ba0f | 2011-11-24 17:39:18 +0800 | [diff] [blame] | 556 | kvm_for_each_memslot(memslot, slots) |
| 557 | kvm_free_physmem_slot(memslot, NULL); |
Marcelo Tosatti | 46a26bf | 2009-12-23 14:35:16 -0200 | [diff] [blame] | 558 | |
| 559 | kfree(kvm->memslots); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 560 | } |
| 561 | |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 562 | static void kvm_destroy_vm(struct kvm *kvm) |
| 563 | { |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 564 | int i; |
Avi Kivity | 6d4e4c4 | 2007-11-21 16:41:05 +0200 | [diff] [blame] | 565 | struct mm_struct *mm = kvm->mm; |
| 566 | |
Sheng Yang | ad8ba2c | 2009-01-06 10:03:02 +0800 | [diff] [blame] | 567 | kvm_arch_sync_events(kvm); |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 568 | raw_spin_lock(&kvm_lock); |
Avi Kivity | 133de90 | 2007-02-12 00:54:44 -0800 | [diff] [blame] | 569 | list_del(&kvm->vm_list); |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 570 | raw_spin_unlock(&kvm_lock); |
Avi Kivity | 399ec80 | 2008-11-19 13:58:46 +0200 | [diff] [blame] | 571 | kvm_free_irq_routing(kvm); |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 572 | for (i = 0; i < KVM_NR_BUSES; i++) |
| 573 | kvm_io_bus_destroy(kvm->buses[i]); |
Avi Kivity | 980da6c | 2009-12-20 15:13:43 +0200 | [diff] [blame] | 574 | kvm_coalesced_mmio_free(kvm); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 575 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) |
| 576 | mmu_notifier_unregister(&kvm->mmu_notifier, kvm->mm); |
Gleb Natapov | f00be0c | 2009-03-19 12:20:36 +0200 | [diff] [blame] | 577 | #else |
| 578 | kvm_arch_flush_shadow(kvm); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 579 | #endif |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 580 | kvm_arch_destroy_vm(kvm); |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 581 | kvm_free_physmem(kvm); |
| 582 | cleanup_srcu_struct(&kvm->srcu); |
| 583 | kvm_arch_free_vm(kvm); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 584 | hardware_disable_all(); |
Avi Kivity | 6d4e4c4 | 2007-11-21 16:41:05 +0200 | [diff] [blame] | 585 | mmdrop(mm); |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 586 | } |
| 587 | |
Izik Eidus | d39f13b | 2008-03-30 16:01:25 +0300 | [diff] [blame] | 588 | void kvm_get_kvm(struct kvm *kvm) |
| 589 | { |
| 590 | atomic_inc(&kvm->users_count); |
| 591 | } |
| 592 | EXPORT_SYMBOL_GPL(kvm_get_kvm); |
| 593 | |
| 594 | void kvm_put_kvm(struct kvm *kvm) |
| 595 | { |
| 596 | if (atomic_dec_and_test(&kvm->users_count)) |
| 597 | kvm_destroy_vm(kvm); |
| 598 | } |
| 599 | EXPORT_SYMBOL_GPL(kvm_put_kvm); |
| 600 | |
| 601 | |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 602 | static int kvm_vm_release(struct inode *inode, struct file *filp) |
| 603 | { |
| 604 | struct kvm *kvm = filp->private_data; |
| 605 | |
Gregory Haskins | 721eecb | 2009-05-20 10:30:49 -0400 | [diff] [blame] | 606 | kvm_irqfd_release(kvm); |
| 607 | |
Izik Eidus | d39f13b | 2008-03-30 16:01:25 +0300 | [diff] [blame] | 608 | kvm_put_kvm(kvm); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 609 | return 0; |
| 610 | } |
| 611 | |
Takuya Yoshikawa | 515a012 | 2010-10-27 18:23:54 +0900 | [diff] [blame] | 612 | /* |
| 613 | * Allocation size is twice as large as the actual dirty bitmap size. |
| 614 | * This makes it possible to do double buffering: see x86's |
| 615 | * kvm_vm_ioctl_get_dirty_log(). |
| 616 | */ |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 617 | static int kvm_create_dirty_bitmap(struct kvm_memory_slot *memslot) |
| 618 | { |
Takuya Yoshikawa | 189a2f7 | 2012-02-08 13:01:09 +0900 | [diff] [blame] | 619 | #ifndef CONFIG_S390 |
Takuya Yoshikawa | 515a012 | 2010-10-27 18:23:54 +0900 | [diff] [blame] | 620 | unsigned long dirty_bytes = 2 * kvm_dirty_bitmap_bytes(memslot); |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 621 | |
Takuya Yoshikawa | 6f9e5c17 | 2010-11-01 14:36:09 +0900 | [diff] [blame] | 622 | if (dirty_bytes > PAGE_SIZE) |
| 623 | memslot->dirty_bitmap = vzalloc(dirty_bytes); |
| 624 | else |
| 625 | memslot->dirty_bitmap = kzalloc(dirty_bytes, GFP_KERNEL); |
| 626 | |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 627 | if (!memslot->dirty_bitmap) |
| 628 | return -ENOMEM; |
| 629 | |
Takuya Yoshikawa | 515a012 | 2010-10-27 18:23:54 +0900 | [diff] [blame] | 630 | memslot->dirty_bitmap_head = memslot->dirty_bitmap; |
Takuya Yoshikawa | 7850ac5 | 2011-11-14 18:23:34 +0900 | [diff] [blame] | 631 | memslot->nr_dirty_pages = 0; |
Takuya Yoshikawa | 189a2f7 | 2012-02-08 13:01:09 +0900 | [diff] [blame] | 632 | #endif /* !CONFIG_S390 */ |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 633 | return 0; |
| 634 | } |
| 635 | |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 636 | static int cmp_memslot(const void *slot1, const void *slot2) |
| 637 | { |
| 638 | struct kvm_memory_slot *s1, *s2; |
| 639 | |
| 640 | s1 = (struct kvm_memory_slot *)slot1; |
| 641 | s2 = (struct kvm_memory_slot *)slot2; |
| 642 | |
| 643 | if (s1->npages < s2->npages) |
| 644 | return 1; |
| 645 | if (s1->npages > s2->npages) |
| 646 | return -1; |
| 647 | |
| 648 | return 0; |
| 649 | } |
| 650 | |
| 651 | /* |
| 652 | * Sort the memslots base on its size, so the larger slots |
| 653 | * will get better fit. |
| 654 | */ |
| 655 | static void sort_memslots(struct kvm_memslots *slots) |
| 656 | { |
Xiao Guangrong | f85e2cb | 2011-11-24 17:41:54 +0800 | [diff] [blame] | 657 | int i; |
| 658 | |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 659 | sort(slots->memslots, KVM_MEM_SLOTS_NUM, |
| 660 | sizeof(struct kvm_memory_slot), cmp_memslot, NULL); |
Xiao Guangrong | f85e2cb | 2011-11-24 17:41:54 +0800 | [diff] [blame] | 661 | |
| 662 | for (i = 0; i < KVM_MEM_SLOTS_NUM; i++) |
| 663 | slots->id_to_index[slots->memslots[i].id] = i; |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 664 | } |
| 665 | |
Xiao Guangrong | be593d6 | 2011-11-24 17:38:24 +0800 | [diff] [blame] | 666 | void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new) |
| 667 | { |
| 668 | if (new) { |
| 669 | int id = new->id; |
Xiao Guangrong | 28a3754 | 2011-11-24 19:04:35 +0800 | [diff] [blame] | 670 | struct kvm_memory_slot *old = id_to_memslot(slots, id); |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 671 | unsigned long npages = old->npages; |
Xiao Guangrong | be593d6 | 2011-11-24 17:38:24 +0800 | [diff] [blame] | 672 | |
Xiao Guangrong | 28a3754 | 2011-11-24 19:04:35 +0800 | [diff] [blame] | 673 | *old = *new; |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 674 | if (new->npages != npages) |
| 675 | sort_memslots(slots); |
Xiao Guangrong | be593d6 | 2011-11-24 17:38:24 +0800 | [diff] [blame] | 676 | } |
| 677 | |
| 678 | slots->generation++; |
| 679 | } |
| 680 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 681 | /* |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 682 | * Allocate some memory and give it an address in the guest physical address |
| 683 | * space. |
| 684 | * |
| 685 | * Discontiguous memory is allowed, mostly for framebuffers. |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 686 | * |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 687 | * Must be called holding mmap_sem for write. |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 688 | */ |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 689 | int __kvm_set_memory_region(struct kvm *kvm, |
| 690 | struct kvm_userspace_memory_region *mem, |
| 691 | int user_alloc) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 692 | { |
Avi Kivity | 8234b22 | 2010-12-27 12:08:45 +0200 | [diff] [blame] | 693 | int r; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 694 | gfn_t base_gfn; |
Heiko Carstens | 28bcb11 | 2009-09-03 17:35:35 +0200 | [diff] [blame] | 695 | unsigned long npages; |
Alex Williamson | 4f874f9 | 2012-11-29 14:07:59 -0700 | [diff] [blame] | 696 | struct kvm_memory_slot *memslot, *slot; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 697 | struct kvm_memory_slot old, new; |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 698 | struct kvm_memslots *slots, *old_memslots; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 699 | |
| 700 | r = -EINVAL; |
| 701 | /* General sanity checks */ |
| 702 | if (mem->memory_size & (PAGE_SIZE - 1)) |
| 703 | goto out; |
| 704 | if (mem->guest_phys_addr & (PAGE_SIZE - 1)) |
| 705 | goto out; |
Takuya Yoshikawa | fa3d315 | 2011-05-07 16:35:38 +0900 | [diff] [blame] | 706 | /* We can read the guest memory with __xxx_user() later on. */ |
| 707 | if (user_alloc && |
| 708 | ((mem->userspace_addr & (PAGE_SIZE - 1)) || |
Heiko Carstens | 9e3bb6b | 2011-05-24 07:51:27 +0200 | [diff] [blame] | 709 | !access_ok(VERIFY_WRITE, |
| 710 | (void __user *)(unsigned long)mem->userspace_addr, |
| 711 | mem->memory_size))) |
Hollis Blanchard | 7874980 | 2008-11-07 13:32:12 -0600 | [diff] [blame] | 712 | goto out; |
Xiao Guangrong | 93a5cef | 2011-11-24 17:37:48 +0800 | [diff] [blame] | 713 | if (mem->slot >= KVM_MEM_SLOTS_NUM) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 714 | goto out; |
| 715 | if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr) |
| 716 | goto out; |
| 717 | |
Xiao Guangrong | 28a3754 | 2011-11-24 19:04:35 +0800 | [diff] [blame] | 718 | memslot = id_to_memslot(kvm->memslots, mem->slot); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 719 | base_gfn = mem->guest_phys_addr >> PAGE_SHIFT; |
| 720 | npages = mem->memory_size >> PAGE_SHIFT; |
| 721 | |
Takuya Yoshikawa | 660c22c | 2010-04-13 22:47:24 +0900 | [diff] [blame] | 722 | r = -EINVAL; |
| 723 | if (npages > KVM_MEM_MAX_NR_PAGES) |
| 724 | goto out; |
| 725 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 726 | if (!npages) |
| 727 | mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES; |
| 728 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 729 | new = old = *memslot; |
| 730 | |
Avi Kivity | e36d96f | 2010-06-21 10:56:36 +0300 | [diff] [blame] | 731 | new.id = mem->slot; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 732 | new.base_gfn = base_gfn; |
| 733 | new.npages = npages; |
| 734 | new.flags = mem->flags; |
| 735 | |
| 736 | /* Disallow changing a memory slot's size. */ |
| 737 | r = -EINVAL; |
| 738 | if (npages && old.npages && npages != old.npages) |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 739 | goto out_free; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 740 | |
| 741 | /* Check for overlaps */ |
| 742 | r = -EEXIST; |
Alex Williamson | 4f874f9 | 2012-11-29 14:07:59 -0700 | [diff] [blame] | 743 | kvm_for_each_memslot(slot, kvm->memslots) { |
| 744 | if (slot->id >= KVM_MEMORY_SLOTS || slot == memslot) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 745 | continue; |
Alex Williamson | 4f874f9 | 2012-11-29 14:07:59 -0700 | [diff] [blame] | 746 | if (!((base_gfn + npages <= slot->base_gfn) || |
| 747 | (base_gfn >= slot->base_gfn + slot->npages))) |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 748 | goto out_free; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 749 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 750 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 751 | /* Free page dirty bitmap if unneeded */ |
| 752 | if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES)) |
Al Viro | 8b6d44c | 2007-02-09 16:38:40 +0000 | [diff] [blame] | 753 | new.dirty_bitmap = NULL; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 754 | |
| 755 | r = -ENOMEM; |
| 756 | |
| 757 | /* Allocate if a slot is being created */ |
Takuya Yoshikawa | 189a2f7 | 2012-02-08 13:01:09 +0900 | [diff] [blame] | 758 | if (npages && !old.npages) { |
| 759 | new.user_alloc = user_alloc; |
| 760 | new.userspace_addr = mem->userspace_addr; |
Carsten Otte | eff0114 | 2008-06-27 15:05:31 +0200 | [diff] [blame] | 761 | #ifndef CONFIG_S390 |
Takuya Yoshikawa | 2653503 | 2010-11-02 10:49:34 +0900 | [diff] [blame] | 762 | new.rmap = vzalloc(npages * sizeof(*new.rmap)); |
Izik Eidus | 290fc38 | 2007-09-27 14:11:22 +0200 | [diff] [blame] | 763 | if (!new.rmap) |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 764 | goto out_free; |
Takuya Yoshikawa | 189a2f7 | 2012-02-08 13:01:09 +0900 | [diff] [blame] | 765 | #endif /* not defined CONFIG_S390 */ |
Takuya Yoshikawa | db3fe4e | 2012-02-08 13:02:18 +0900 | [diff] [blame] | 766 | if (kvm_arch_create_memslot(&new, npages)) |
| 767 | goto out_free; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 768 | } |
Joerg Roedel | ec04b26 | 2009-06-19 15:16:23 +0200 | [diff] [blame] | 769 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 770 | /* Allocate page dirty bitmap if needed */ |
| 771 | if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) { |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 772 | if (kvm_create_dirty_bitmap(&new) < 0) |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 773 | goto out_free; |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 774 | /* destroy any largepage mappings for dirty tracking */ |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 775 | } |
| 776 | |
Marcelo Tosatti | eb6d745 | 2012-08-24 15:54:58 -0300 | [diff] [blame] | 777 | if (!npages || base_gfn != old.base_gfn) { |
Xiao Guangrong | 28a3754 | 2011-11-24 19:04:35 +0800 | [diff] [blame] | 778 | struct kvm_memory_slot *slot; |
| 779 | |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 780 | r = -ENOMEM; |
Thomas Meyer | 6da64fd | 2011-11-08 20:32:19 +0100 | [diff] [blame] | 781 | slots = kmemdup(kvm->memslots, sizeof(struct kvm_memslots), |
| 782 | GFP_KERNEL); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 783 | if (!slots) |
| 784 | goto out_free; |
Xiao Guangrong | 28a3754 | 2011-11-24 19:04:35 +0800 | [diff] [blame] | 785 | slot = id_to_memslot(slots, mem->slot); |
| 786 | slot->flags |= KVM_MEMSLOT_INVALID; |
| 787 | |
Xiao Guangrong | be593d6 | 2011-11-24 17:38:24 +0800 | [diff] [blame] | 788 | update_memslots(slots, NULL); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 789 | |
| 790 | old_memslots = kvm->memslots; |
| 791 | rcu_assign_pointer(kvm->memslots, slots); |
| 792 | synchronize_srcu_expedited(&kvm->srcu); |
Alex Williamson | f6ec979 | 2012-12-10 10:32:57 -0700 | [diff] [blame] | 793 | /* slot was deleted or moved, clear iommu mapping */ |
| 794 | kvm_iommu_unmap_pages(kvm, &old); |
Marcelo Tosatti | eb6d745 | 2012-08-24 15:54:58 -0300 | [diff] [blame] | 795 | /* From this point no new shadow pages pointing to a deleted, |
| 796 | * or moved, memslot will be created. |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 797 | * |
| 798 | * validation of sp->gfn happens in: |
| 799 | * - gfn_to_hva (kvm_read_guest, gfn_to_pfn) |
| 800 | * - kvm_is_visible_gfn (mmu_check_roots) |
| 801 | */ |
Marcelo Tosatti | 34d4cb8 | 2008-07-10 20:49:31 -0300 | [diff] [blame] | 802 | kvm_arch_flush_shadow(kvm); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 803 | kfree(old_memslots); |
| 804 | } |
Marcelo Tosatti | 34d4cb8 | 2008-07-10 20:49:31 -0300 | [diff] [blame] | 805 | |
Marcelo Tosatti | f7784b8 | 2009-12-23 14:35:18 -0200 | [diff] [blame] | 806 | r = kvm_arch_prepare_memory_region(kvm, &new, old, mem, user_alloc); |
| 807 | if (r) |
| 808 | goto out_free; |
| 809 | |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 810 | r = -ENOMEM; |
Thomas Meyer | 6da64fd | 2011-11-08 20:32:19 +0100 | [diff] [blame] | 811 | slots = kmemdup(kvm->memslots, sizeof(struct kvm_memslots), |
| 812 | GFP_KERNEL); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 813 | if (!slots) |
| 814 | goto out_free; |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 815 | |
Alex Williamson | f6ec979 | 2012-12-10 10:32:57 -0700 | [diff] [blame] | 816 | /* map new memory slot into the iommu */ |
| 817 | if (npages) { |
| 818 | r = kvm_iommu_map_pages(kvm, &new); |
| 819 | if (r) |
| 820 | goto out_slots; |
| 821 | } |
| 822 | |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 823 | /* actual memory is freed via old in kvm_free_physmem_slot below */ |
| 824 | if (!npages) { |
| 825 | new.rmap = NULL; |
| 826 | new.dirty_bitmap = NULL; |
Takuya Yoshikawa | db3fe4e | 2012-02-08 13:02:18 +0900 | [diff] [blame] | 827 | memset(&new.arch, 0, sizeof(new.arch)); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 828 | } |
| 829 | |
Xiao Guangrong | be593d6 | 2011-11-24 17:38:24 +0800 | [diff] [blame] | 830 | update_memslots(slots, &new); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 831 | old_memslots = kvm->memslots; |
| 832 | rcu_assign_pointer(kvm->memslots, slots); |
| 833 | synchronize_srcu_expedited(&kvm->srcu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 834 | |
Marcelo Tosatti | f7784b8 | 2009-12-23 14:35:18 -0200 | [diff] [blame] | 835 | kvm_arch_commit_memory_region(kvm, mem, old, user_alloc); |
Zhang Xiantao | 3ad82a7 | 2007-11-20 13:11:38 +0800 | [diff] [blame] | 836 | |
Xiao Guangrong | ce88dec | 2011-07-12 03:33:44 +0800 | [diff] [blame] | 837 | /* |
| 838 | * If the new memory slot is created, we need to clear all |
| 839 | * mmio sptes. |
| 840 | */ |
| 841 | if (npages && old.base_gfn != mem->guest_phys_addr >> PAGE_SHIFT) |
| 842 | kvm_arch_flush_shadow(kvm); |
| 843 | |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 844 | kvm_free_physmem_slot(&old, &new); |
| 845 | kfree(old_memslots); |
| 846 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 847 | return 0; |
| 848 | |
Alex Williamson | f6ec979 | 2012-12-10 10:32:57 -0700 | [diff] [blame] | 849 | out_slots: |
| 850 | kfree(slots); |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 851 | out_free: |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 852 | kvm_free_physmem_slot(&new, &old); |
| 853 | out: |
| 854 | return r; |
Izik Eidus | 210c7c4 | 2007-10-24 23:52:57 +0200 | [diff] [blame] | 855 | |
| 856 | } |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 857 | EXPORT_SYMBOL_GPL(__kvm_set_memory_region); |
| 858 | |
| 859 | int kvm_set_memory_region(struct kvm *kvm, |
| 860 | struct kvm_userspace_memory_region *mem, |
| 861 | int user_alloc) |
| 862 | { |
| 863 | int r; |
| 864 | |
Marcelo Tosatti | 79fac95 | 2009-12-23 14:35:26 -0200 | [diff] [blame] | 865 | mutex_lock(&kvm->slots_lock); |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 866 | r = __kvm_set_memory_region(kvm, mem, user_alloc); |
Marcelo Tosatti | 79fac95 | 2009-12-23 14:35:26 -0200 | [diff] [blame] | 867 | mutex_unlock(&kvm->slots_lock); |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 868 | return r; |
| 869 | } |
Izik Eidus | 210c7c4 | 2007-10-24 23:52:57 +0200 | [diff] [blame] | 870 | EXPORT_SYMBOL_GPL(kvm_set_memory_region); |
| 871 | |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 872 | int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, |
| 873 | struct |
| 874 | kvm_userspace_memory_region *mem, |
| 875 | int user_alloc) |
Izik Eidus | 210c7c4 | 2007-10-24 23:52:57 +0200 | [diff] [blame] | 876 | { |
Izik Eidus | e0d62c7 | 2007-10-24 23:57:46 +0200 | [diff] [blame] | 877 | if (mem->slot >= KVM_MEMORY_SLOTS) |
| 878 | return -EINVAL; |
Izik Eidus | 210c7c4 | 2007-10-24 23:52:57 +0200 | [diff] [blame] | 879 | return kvm_set_memory_region(kvm, mem, user_alloc); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 880 | } |
| 881 | |
Zhang Xiantao | 5bb064d | 2007-11-18 20:29:43 +0800 | [diff] [blame] | 882 | int kvm_get_dirty_log(struct kvm *kvm, |
| 883 | struct kvm_dirty_log *log, int *is_dirty) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 884 | { |
| 885 | struct kvm_memory_slot *memslot; |
| 886 | int r, i; |
Takuya Yoshikawa | 87bf6e7 | 2010-04-12 19:35:35 +0900 | [diff] [blame] | 887 | unsigned long n; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 888 | unsigned long any = 0; |
| 889 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 890 | r = -EINVAL; |
| 891 | if (log->slot >= KVM_MEMORY_SLOTS) |
| 892 | goto out; |
| 893 | |
Xiao Guangrong | 28a3754 | 2011-11-24 19:04:35 +0800 | [diff] [blame] | 894 | memslot = id_to_memslot(kvm->memslots, log->slot); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 895 | r = -ENOENT; |
| 896 | if (!memslot->dirty_bitmap) |
| 897 | goto out; |
| 898 | |
Takuya Yoshikawa | 87bf6e7 | 2010-04-12 19:35:35 +0900 | [diff] [blame] | 899 | n = kvm_dirty_bitmap_bytes(memslot); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 900 | |
Uri Lublin | cd1a4a9 | 2007-02-22 16:43:09 +0200 | [diff] [blame] | 901 | for (i = 0; !any && i < n/sizeof(long); ++i) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 902 | any = memslot->dirty_bitmap[i]; |
| 903 | |
| 904 | r = -EFAULT; |
| 905 | if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n)) |
| 906 | goto out; |
| 907 | |
Zhang Xiantao | 5bb064d | 2007-11-18 20:29:43 +0800 | [diff] [blame] | 908 | if (any) |
| 909 | *is_dirty = 1; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 910 | |
| 911 | r = 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 912 | out: |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 913 | return r; |
| 914 | } |
| 915 | |
Takuya Yoshikawa | db3fe4e | 2012-02-08 13:02:18 +0900 | [diff] [blame] | 916 | bool kvm_largepages_enabled(void) |
| 917 | { |
| 918 | return largepages_enabled; |
| 919 | } |
| 920 | |
Marcelo Tosatti | 54dee99 | 2009-06-11 12:07:44 -0300 | [diff] [blame] | 921 | void kvm_disable_largepages(void) |
| 922 | { |
| 923 | largepages_enabled = false; |
| 924 | } |
| 925 | EXPORT_SYMBOL_GPL(kvm_disable_largepages); |
| 926 | |
Izik Eidus | cea7bb2 | 2007-10-17 19:17:48 +0200 | [diff] [blame] | 927 | int is_error_page(struct page *page) |
| 928 | { |
Gleb Natapov | edba23e | 2010-07-07 20:16:45 +0300 | [diff] [blame] | 929 | return page == bad_page || page == hwpoison_page || page == fault_page; |
Izik Eidus | cea7bb2 | 2007-10-17 19:17:48 +0200 | [diff] [blame] | 930 | } |
| 931 | EXPORT_SYMBOL_GPL(is_error_page); |
| 932 | |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 933 | int is_error_pfn(pfn_t pfn) |
| 934 | { |
Gleb Natapov | edba23e | 2010-07-07 20:16:45 +0300 | [diff] [blame] | 935 | return pfn == bad_pfn || pfn == hwpoison_pfn || pfn == fault_pfn; |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 936 | } |
| 937 | EXPORT_SYMBOL_GPL(is_error_pfn); |
| 938 | |
Huang Ying | bf99815 | 2010-05-31 14:28:19 +0800 | [diff] [blame] | 939 | int is_hwpoison_pfn(pfn_t pfn) |
| 940 | { |
| 941 | return pfn == hwpoison_pfn; |
| 942 | } |
| 943 | EXPORT_SYMBOL_GPL(is_hwpoison_pfn); |
| 944 | |
Gleb Natapov | edba23e | 2010-07-07 20:16:45 +0300 | [diff] [blame] | 945 | int is_fault_pfn(pfn_t pfn) |
| 946 | { |
| 947 | return pfn == fault_pfn; |
| 948 | } |
| 949 | EXPORT_SYMBOL_GPL(is_fault_pfn); |
| 950 | |
Xiao Guangrong | fce92dc | 2011-07-12 03:28:54 +0800 | [diff] [blame] | 951 | int is_noslot_pfn(pfn_t pfn) |
| 952 | { |
| 953 | return pfn == bad_pfn; |
| 954 | } |
| 955 | EXPORT_SYMBOL_GPL(is_noslot_pfn); |
| 956 | |
| 957 | int is_invalid_pfn(pfn_t pfn) |
| 958 | { |
| 959 | return pfn == hwpoison_pfn || pfn == fault_pfn; |
| 960 | } |
| 961 | EXPORT_SYMBOL_GPL(is_invalid_pfn); |
| 962 | |
Izik Eidus | f9d46eb | 2007-11-11 22:02:22 +0200 | [diff] [blame] | 963 | static inline unsigned long bad_hva(void) |
| 964 | { |
| 965 | return PAGE_OFFSET; |
| 966 | } |
| 967 | |
| 968 | int kvm_is_error_hva(unsigned long addr) |
| 969 | { |
| 970 | return addr == bad_hva(); |
| 971 | } |
| 972 | EXPORT_SYMBOL_GPL(kvm_is_error_hva); |
| 973 | |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 974 | struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn) |
| 975 | { |
| 976 | return __gfn_to_memslot(kvm_memslots(kvm), gfn); |
| 977 | } |
Avi Kivity | a1f4d39 | 2010-06-21 11:44:20 +0300 | [diff] [blame] | 978 | EXPORT_SYMBOL_GPL(gfn_to_memslot); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 979 | |
Izik Eidus | e0d62c7 | 2007-10-24 23:57:46 +0200 | [diff] [blame] | 980 | int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn) |
| 981 | { |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 982 | struct kvm_memory_slot *memslot = gfn_to_memslot(kvm, gfn); |
Izik Eidus | e0d62c7 | 2007-10-24 23:57:46 +0200 | [diff] [blame] | 983 | |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 984 | if (!memslot || memslot->id >= KVM_MEMORY_SLOTS || |
| 985 | memslot->flags & KVM_MEMSLOT_INVALID) |
| 986 | return 0; |
Izik Eidus | e0d62c7 | 2007-10-24 23:57:46 +0200 | [diff] [blame] | 987 | |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 988 | return 1; |
Izik Eidus | e0d62c7 | 2007-10-24 23:57:46 +0200 | [diff] [blame] | 989 | } |
| 990 | EXPORT_SYMBOL_GPL(kvm_is_visible_gfn); |
| 991 | |
Joerg Roedel | 8f0b1ab | 2010-01-28 12:37:56 +0100 | [diff] [blame] | 992 | unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn) |
| 993 | { |
| 994 | struct vm_area_struct *vma; |
| 995 | unsigned long addr, size; |
| 996 | |
| 997 | size = PAGE_SIZE; |
| 998 | |
| 999 | addr = gfn_to_hva(kvm, gfn); |
| 1000 | if (kvm_is_error_hva(addr)) |
| 1001 | return PAGE_SIZE; |
| 1002 | |
| 1003 | down_read(¤t->mm->mmap_sem); |
| 1004 | vma = find_vma(current->mm, addr); |
| 1005 | if (!vma) |
| 1006 | goto out; |
| 1007 | |
| 1008 | size = vma_kernel_pagesize(vma); |
| 1009 | |
| 1010 | out: |
| 1011 | up_read(¤t->mm->mmap_sem); |
| 1012 | |
| 1013 | return size; |
| 1014 | } |
| 1015 | |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1016 | static unsigned long gfn_to_hva_many(struct kvm_memory_slot *slot, gfn_t gfn, |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 1017 | gfn_t *nr_pages) |
Izik Eidus | 539cb66 | 2007-11-11 22:05:04 +0200 | [diff] [blame] | 1018 | { |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 1019 | if (!slot || slot->flags & KVM_MEMSLOT_INVALID) |
Izik Eidus | 539cb66 | 2007-11-11 22:05:04 +0200 | [diff] [blame] | 1020 | return bad_hva(); |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 1021 | |
| 1022 | if (nr_pages) |
| 1023 | *nr_pages = slot->npages - (gfn - slot->base_gfn); |
| 1024 | |
Takuya Yoshikawa | f5c9803 | 2010-02-25 11:33:19 +0900 | [diff] [blame] | 1025 | return gfn_to_hva_memslot(slot, gfn); |
Izik Eidus | 539cb66 | 2007-11-11 22:05:04 +0200 | [diff] [blame] | 1026 | } |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 1027 | |
| 1028 | unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn) |
| 1029 | { |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1030 | return gfn_to_hva_many(gfn_to_memslot(kvm, gfn), gfn, NULL); |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 1031 | } |
Sheng Yang | 0d15029 | 2008-04-25 21:44:50 +0800 | [diff] [blame] | 1032 | EXPORT_SYMBOL_GPL(gfn_to_hva); |
Izik Eidus | 539cb66 | 2007-11-11 22:05:04 +0200 | [diff] [blame] | 1033 | |
Gleb Natapov | 8030089 | 2010-10-19 18:13:41 +0200 | [diff] [blame] | 1034 | static pfn_t get_fault_pfn(void) |
| 1035 | { |
| 1036 | get_page(fault_page); |
| 1037 | return fault_pfn; |
| 1038 | } |
| 1039 | |
Gleb Natapov | 0857b9e | 2011-02-01 13:21:47 +0200 | [diff] [blame] | 1040 | int get_user_page_nowait(struct task_struct *tsk, struct mm_struct *mm, |
| 1041 | unsigned long start, int write, struct page **page) |
| 1042 | { |
| 1043 | int flags = FOLL_TOUCH | FOLL_NOWAIT | FOLL_HWPOISON | FOLL_GET; |
| 1044 | |
| 1045 | if (write) |
| 1046 | flags |= FOLL_WRITE; |
| 1047 | |
| 1048 | return __get_user_pages(tsk, mm, start, 1, flags, page, NULL, NULL); |
| 1049 | } |
| 1050 | |
Huang Ying | fafc3db | 2011-01-30 11:15:49 +0800 | [diff] [blame] | 1051 | static inline int check_user_page_hwpoison(unsigned long addr) |
| 1052 | { |
| 1053 | int rc, flags = FOLL_TOUCH | FOLL_HWPOISON | FOLL_WRITE; |
| 1054 | |
| 1055 | rc = __get_user_pages(current, current->mm, addr, 1, |
| 1056 | flags, NULL, NULL, NULL); |
| 1057 | return rc == -EHWPOISON; |
| 1058 | } |
| 1059 | |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 1060 | static pfn_t hva_to_pfn(struct kvm *kvm, unsigned long addr, bool atomic, |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1061 | bool *async, bool write_fault, bool *writable) |
Avi Kivity | 954bbbc2 | 2007-03-30 14:02:32 +0300 | [diff] [blame] | 1062 | { |
Anthony Liguori | 8d4e128 | 2007-10-18 09:59:34 -0500 | [diff] [blame] | 1063 | struct page *page[1]; |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 1064 | int npages = 0; |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1065 | pfn_t pfn; |
Avi Kivity | 954bbbc2 | 2007-03-30 14:02:32 +0300 | [diff] [blame] | 1066 | |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 1067 | /* we can do it either atomically or asynchronously, not both */ |
| 1068 | BUG_ON(atomic && async); |
| 1069 | |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1070 | BUG_ON(!write_fault && !writable); |
| 1071 | |
| 1072 | if (writable) |
| 1073 | *writable = true; |
| 1074 | |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 1075 | if (atomic || async) |
Xiao Guangrong | 887c08a | 2010-08-22 19:10:28 +0800 | [diff] [blame] | 1076 | npages = __get_user_pages_fast(addr, 1, 1, page); |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 1077 | |
| 1078 | if (unlikely(npages != 1) && !atomic) { |
Xiao Guangrong | 887c08a | 2010-08-22 19:10:28 +0800 | [diff] [blame] | 1079 | might_sleep(); |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1080 | |
| 1081 | if (writable) |
| 1082 | *writable = write_fault; |
| 1083 | |
Gleb Natapov | 0857b9e | 2011-02-01 13:21:47 +0200 | [diff] [blame] | 1084 | if (async) { |
| 1085 | down_read(¤t->mm->mmap_sem); |
| 1086 | npages = get_user_page_nowait(current, current->mm, |
| 1087 | addr, write_fault, page); |
| 1088 | up_read(¤t->mm->mmap_sem); |
| 1089 | } else |
| 1090 | npages = get_user_pages_fast(addr, 1, write_fault, |
| 1091 | page); |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1092 | |
| 1093 | /* map read fault as writable if possible */ |
| 1094 | if (unlikely(!write_fault) && npages == 1) { |
| 1095 | struct page *wpage[1]; |
| 1096 | |
| 1097 | npages = __get_user_pages_fast(addr, 1, 1, wpage); |
| 1098 | if (npages == 1) { |
| 1099 | *writable = true; |
| 1100 | put_page(page[0]); |
| 1101 | page[0] = wpage[0]; |
| 1102 | } |
| 1103 | npages = 1; |
| 1104 | } |
Xiao Guangrong | 887c08a | 2010-08-22 19:10:28 +0800 | [diff] [blame] | 1105 | } |
Izik Eidus | 539cb66 | 2007-11-11 22:05:04 +0200 | [diff] [blame] | 1106 | |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1107 | if (unlikely(npages != 1)) { |
| 1108 | struct vm_area_struct *vma; |
Anthony Liguori | 8d4e128 | 2007-10-18 09:59:34 -0500 | [diff] [blame] | 1109 | |
Xiao Guangrong | 887c08a | 2010-08-22 19:10:28 +0800 | [diff] [blame] | 1110 | if (atomic) |
Gleb Natapov | 8030089 | 2010-10-19 18:13:41 +0200 | [diff] [blame] | 1111 | return get_fault_pfn(); |
Xiao Guangrong | 887c08a | 2010-08-22 19:10:28 +0800 | [diff] [blame] | 1112 | |
Huang Ying | bbeb340 | 2010-06-22 14:23:11 +0800 | [diff] [blame] | 1113 | down_read(¤t->mm->mmap_sem); |
Gleb Natapov | 0857b9e | 2011-02-01 13:21:47 +0200 | [diff] [blame] | 1114 | if (npages == -EHWPOISON || |
| 1115 | (!async && check_user_page_hwpoison(addr))) { |
Huang Ying | bbeb340 | 2010-06-22 14:23:11 +0800 | [diff] [blame] | 1116 | up_read(¤t->mm->mmap_sem); |
Huang Ying | bf99815 | 2010-05-31 14:28:19 +0800 | [diff] [blame] | 1117 | get_page(hwpoison_page); |
| 1118 | return page_to_pfn(hwpoison_page); |
| 1119 | } |
| 1120 | |
Gleb Natapov | 8030089 | 2010-10-19 18:13:41 +0200 | [diff] [blame] | 1121 | vma = find_vma_intersection(current->mm, addr, addr+1); |
Marcelo Tosatti | 4c2155c | 2008-09-16 20:54:47 -0300 | [diff] [blame] | 1122 | |
Gleb Natapov | 8030089 | 2010-10-19 18:13:41 +0200 | [diff] [blame] | 1123 | if (vma == NULL) |
| 1124 | pfn = get_fault_pfn(); |
| 1125 | else if ((vma->vm_flags & VM_PFNMAP)) { |
| 1126 | pfn = ((addr - vma->vm_start) >> PAGE_SHIFT) + |
| 1127 | vma->vm_pgoff; |
| 1128 | BUG_ON(!kvm_is_mmio_pfn(pfn)); |
| 1129 | } else { |
| 1130 | if (async && (vma->vm_flags & VM_WRITE)) |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 1131 | *async = true; |
Gleb Natapov | 8030089 | 2010-10-19 18:13:41 +0200 | [diff] [blame] | 1132 | pfn = get_fault_pfn(); |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1133 | } |
Marcelo Tosatti | 4c2155c | 2008-09-16 20:54:47 -0300 | [diff] [blame] | 1134 | up_read(¤t->mm->mmap_sem); |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1135 | } else |
| 1136 | pfn = page_to_pfn(page[0]); |
| 1137 | |
| 1138 | return pfn; |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1139 | } |
| 1140 | |
Xiao Guangrong | 887c08a | 2010-08-22 19:10:28 +0800 | [diff] [blame] | 1141 | pfn_t hva_to_pfn_atomic(struct kvm *kvm, unsigned long addr) |
| 1142 | { |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1143 | return hva_to_pfn(kvm, addr, true, NULL, true, NULL); |
Xiao Guangrong | 887c08a | 2010-08-22 19:10:28 +0800 | [diff] [blame] | 1144 | } |
| 1145 | EXPORT_SYMBOL_GPL(hva_to_pfn_atomic); |
| 1146 | |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1147 | static pfn_t __gfn_to_pfn(struct kvm *kvm, gfn_t gfn, bool atomic, bool *async, |
| 1148 | bool write_fault, bool *writable) |
Marcelo Tosatti | 506f0d6 | 2009-12-23 14:35:19 -0200 | [diff] [blame] | 1149 | { |
| 1150 | unsigned long addr; |
| 1151 | |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 1152 | if (async) |
| 1153 | *async = false; |
| 1154 | |
Marcelo Tosatti | 506f0d6 | 2009-12-23 14:35:19 -0200 | [diff] [blame] | 1155 | addr = gfn_to_hva(kvm, gfn); |
| 1156 | if (kvm_is_error_hva(addr)) { |
| 1157 | get_page(bad_page); |
| 1158 | return page_to_pfn(bad_page); |
| 1159 | } |
| 1160 | |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1161 | return hva_to_pfn(kvm, addr, atomic, async, write_fault, writable); |
Xiao Guangrong | 365fb3f | 2010-08-28 19:24:13 +0800 | [diff] [blame] | 1162 | } |
| 1163 | |
| 1164 | pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn) |
| 1165 | { |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1166 | return __gfn_to_pfn(kvm, gfn, true, NULL, true, NULL); |
Xiao Guangrong | 365fb3f | 2010-08-28 19:24:13 +0800 | [diff] [blame] | 1167 | } |
| 1168 | EXPORT_SYMBOL_GPL(gfn_to_pfn_atomic); |
| 1169 | |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1170 | pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async, |
| 1171 | bool write_fault, bool *writable) |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 1172 | { |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1173 | return __gfn_to_pfn(kvm, gfn, false, async, write_fault, writable); |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 1174 | } |
| 1175 | EXPORT_SYMBOL_GPL(gfn_to_pfn_async); |
| 1176 | |
Xiao Guangrong | 365fb3f | 2010-08-28 19:24:13 +0800 | [diff] [blame] | 1177 | pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn) |
| 1178 | { |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1179 | return __gfn_to_pfn(kvm, gfn, false, NULL, true, NULL); |
Marcelo Tosatti | 506f0d6 | 2009-12-23 14:35:19 -0200 | [diff] [blame] | 1180 | } |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1181 | EXPORT_SYMBOL_GPL(gfn_to_pfn); |
| 1182 | |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1183 | pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault, |
| 1184 | bool *writable) |
| 1185 | { |
| 1186 | return __gfn_to_pfn(kvm, gfn, false, NULL, write_fault, writable); |
| 1187 | } |
| 1188 | EXPORT_SYMBOL_GPL(gfn_to_pfn_prot); |
| 1189 | |
Marcelo Tosatti | 506f0d6 | 2009-12-23 14:35:19 -0200 | [diff] [blame] | 1190 | pfn_t gfn_to_pfn_memslot(struct kvm *kvm, |
| 1191 | struct kvm_memory_slot *slot, gfn_t gfn) |
| 1192 | { |
| 1193 | unsigned long addr = gfn_to_hva_memslot(slot, gfn); |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1194 | return hva_to_pfn(kvm, addr, false, NULL, true, NULL); |
Marcelo Tosatti | 506f0d6 | 2009-12-23 14:35:19 -0200 | [diff] [blame] | 1195 | } |
| 1196 | |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 1197 | int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages, |
| 1198 | int nr_pages) |
| 1199 | { |
| 1200 | unsigned long addr; |
| 1201 | gfn_t entry; |
| 1202 | |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1203 | addr = gfn_to_hva_many(gfn_to_memslot(kvm, gfn), gfn, &entry); |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 1204 | if (kvm_is_error_hva(addr)) |
| 1205 | return -1; |
| 1206 | |
| 1207 | if (entry < nr_pages) |
| 1208 | return 0; |
| 1209 | |
| 1210 | return __get_user_pages_fast(addr, nr_pages, 1, pages); |
| 1211 | } |
| 1212 | EXPORT_SYMBOL_GPL(gfn_to_page_many_atomic); |
| 1213 | |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1214 | struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn) |
| 1215 | { |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1216 | pfn_t pfn; |
| 1217 | |
| 1218 | pfn = gfn_to_pfn(kvm, gfn); |
Xiantao Zhang | c77fb9d | 2008-09-27 10:55:40 +0800 | [diff] [blame] | 1219 | if (!kvm_is_mmio_pfn(pfn)) |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1220 | return pfn_to_page(pfn); |
| 1221 | |
Xiantao Zhang | c77fb9d | 2008-09-27 10:55:40 +0800 | [diff] [blame] | 1222 | WARN_ON(kvm_is_mmio_pfn(pfn)); |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1223 | |
| 1224 | get_page(bad_page); |
| 1225 | return bad_page; |
Avi Kivity | 954bbbc2 | 2007-03-30 14:02:32 +0300 | [diff] [blame] | 1226 | } |
Anthony Liguori | aab61cc | 2007-10-29 15:15:20 -0500 | [diff] [blame] | 1227 | |
Avi Kivity | 954bbbc2 | 2007-03-30 14:02:32 +0300 | [diff] [blame] | 1228 | EXPORT_SYMBOL_GPL(gfn_to_page); |
| 1229 | |
Izik Eidus | b4231d6 | 2007-11-20 11:49:33 +0200 | [diff] [blame] | 1230 | void kvm_release_page_clean(struct page *page) |
| 1231 | { |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1232 | kvm_release_pfn_clean(page_to_pfn(page)); |
Izik Eidus | b4231d6 | 2007-11-20 11:49:33 +0200 | [diff] [blame] | 1233 | } |
| 1234 | EXPORT_SYMBOL_GPL(kvm_release_page_clean); |
| 1235 | |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1236 | void kvm_release_pfn_clean(pfn_t pfn) |
| 1237 | { |
Xiantao Zhang | c77fb9d | 2008-09-27 10:55:40 +0800 | [diff] [blame] | 1238 | if (!kvm_is_mmio_pfn(pfn)) |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1239 | put_page(pfn_to_page(pfn)); |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1240 | } |
| 1241 | EXPORT_SYMBOL_GPL(kvm_release_pfn_clean); |
| 1242 | |
Izik Eidus | b4231d6 | 2007-11-20 11:49:33 +0200 | [diff] [blame] | 1243 | void kvm_release_page_dirty(struct page *page) |
Izik Eidus | 8a7ae05 | 2007-10-18 11:09:33 +0200 | [diff] [blame] | 1244 | { |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1245 | kvm_release_pfn_dirty(page_to_pfn(page)); |
Izik Eidus | 8a7ae05 | 2007-10-18 11:09:33 +0200 | [diff] [blame] | 1246 | } |
Izik Eidus | b4231d6 | 2007-11-20 11:49:33 +0200 | [diff] [blame] | 1247 | EXPORT_SYMBOL_GPL(kvm_release_page_dirty); |
Izik Eidus | 8a7ae05 | 2007-10-18 11:09:33 +0200 | [diff] [blame] | 1248 | |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1249 | void kvm_release_pfn_dirty(pfn_t pfn) |
| 1250 | { |
| 1251 | kvm_set_pfn_dirty(pfn); |
| 1252 | kvm_release_pfn_clean(pfn); |
| 1253 | } |
| 1254 | EXPORT_SYMBOL_GPL(kvm_release_pfn_dirty); |
| 1255 | |
| 1256 | void kvm_set_page_dirty(struct page *page) |
| 1257 | { |
| 1258 | kvm_set_pfn_dirty(page_to_pfn(page)); |
| 1259 | } |
| 1260 | EXPORT_SYMBOL_GPL(kvm_set_page_dirty); |
| 1261 | |
| 1262 | void kvm_set_pfn_dirty(pfn_t pfn) |
| 1263 | { |
Xiantao Zhang | c77fb9d | 2008-09-27 10:55:40 +0800 | [diff] [blame] | 1264 | if (!kvm_is_mmio_pfn(pfn)) { |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1265 | struct page *page = pfn_to_page(pfn); |
| 1266 | if (!PageReserved(page)) |
| 1267 | SetPageDirty(page); |
| 1268 | } |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1269 | } |
| 1270 | EXPORT_SYMBOL_GPL(kvm_set_pfn_dirty); |
| 1271 | |
| 1272 | void kvm_set_pfn_accessed(pfn_t pfn) |
| 1273 | { |
Xiantao Zhang | c77fb9d | 2008-09-27 10:55:40 +0800 | [diff] [blame] | 1274 | if (!kvm_is_mmio_pfn(pfn)) |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1275 | mark_page_accessed(pfn_to_page(pfn)); |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1276 | } |
| 1277 | EXPORT_SYMBOL_GPL(kvm_set_pfn_accessed); |
| 1278 | |
| 1279 | void kvm_get_pfn(pfn_t pfn) |
| 1280 | { |
Xiantao Zhang | c77fb9d | 2008-09-27 10:55:40 +0800 | [diff] [blame] | 1281 | if (!kvm_is_mmio_pfn(pfn)) |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1282 | get_page(pfn_to_page(pfn)); |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1283 | } |
| 1284 | EXPORT_SYMBOL_GPL(kvm_get_pfn); |
| 1285 | |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1286 | static int next_segment(unsigned long len, int offset) |
| 1287 | { |
| 1288 | if (len > PAGE_SIZE - offset) |
| 1289 | return PAGE_SIZE - offset; |
| 1290 | else |
| 1291 | return len; |
| 1292 | } |
| 1293 | |
| 1294 | int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, |
| 1295 | int len) |
| 1296 | { |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1297 | int r; |
| 1298 | unsigned long addr; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1299 | |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1300 | addr = gfn_to_hva(kvm, gfn); |
| 1301 | if (kvm_is_error_hva(addr)) |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1302 | return -EFAULT; |
Takuya Yoshikawa | fa3d315 | 2011-05-07 16:35:38 +0900 | [diff] [blame] | 1303 | r = __copy_from_user(data, (void __user *)addr + offset, len); |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1304 | if (r) |
| 1305 | return -EFAULT; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1306 | return 0; |
| 1307 | } |
| 1308 | EXPORT_SYMBOL_GPL(kvm_read_guest_page); |
| 1309 | |
| 1310 | int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len) |
| 1311 | { |
| 1312 | gfn_t gfn = gpa >> PAGE_SHIFT; |
| 1313 | int seg; |
| 1314 | int offset = offset_in_page(gpa); |
| 1315 | int ret; |
| 1316 | |
| 1317 | while ((seg = next_segment(len, offset)) != 0) { |
| 1318 | ret = kvm_read_guest_page(kvm, gfn, data, offset, seg); |
| 1319 | if (ret < 0) |
| 1320 | return ret; |
| 1321 | offset = 0; |
| 1322 | len -= seg; |
| 1323 | data += seg; |
| 1324 | ++gfn; |
| 1325 | } |
| 1326 | return 0; |
| 1327 | } |
| 1328 | EXPORT_SYMBOL_GPL(kvm_read_guest); |
| 1329 | |
Marcelo Tosatti | 7ec5458 | 2007-12-20 19:18:23 -0500 | [diff] [blame] | 1330 | int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, |
| 1331 | unsigned long len) |
| 1332 | { |
| 1333 | int r; |
| 1334 | unsigned long addr; |
| 1335 | gfn_t gfn = gpa >> PAGE_SHIFT; |
| 1336 | int offset = offset_in_page(gpa); |
| 1337 | |
| 1338 | addr = gfn_to_hva(kvm, gfn); |
| 1339 | if (kvm_is_error_hva(addr)) |
| 1340 | return -EFAULT; |
Andrea Arcangeli | 0aac03f | 2008-01-30 19:57:35 +0100 | [diff] [blame] | 1341 | pagefault_disable(); |
Marcelo Tosatti | 7ec5458 | 2007-12-20 19:18:23 -0500 | [diff] [blame] | 1342 | r = __copy_from_user_inatomic(data, (void __user *)addr + offset, len); |
Andrea Arcangeli | 0aac03f | 2008-01-30 19:57:35 +0100 | [diff] [blame] | 1343 | pagefault_enable(); |
Marcelo Tosatti | 7ec5458 | 2007-12-20 19:18:23 -0500 | [diff] [blame] | 1344 | if (r) |
| 1345 | return -EFAULT; |
| 1346 | return 0; |
| 1347 | } |
| 1348 | EXPORT_SYMBOL(kvm_read_guest_atomic); |
| 1349 | |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1350 | int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, |
| 1351 | int offset, int len) |
| 1352 | { |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1353 | int r; |
| 1354 | unsigned long addr; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1355 | |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1356 | addr = gfn_to_hva(kvm, gfn); |
| 1357 | if (kvm_is_error_hva(addr)) |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1358 | return -EFAULT; |
Xiao Guangrong | 8b0cedf | 2011-05-15 23:22:04 +0800 | [diff] [blame] | 1359 | r = __copy_to_user((void __user *)addr + offset, data, len); |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1360 | if (r) |
| 1361 | return -EFAULT; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1362 | mark_page_dirty(kvm, gfn); |
| 1363 | return 0; |
| 1364 | } |
| 1365 | EXPORT_SYMBOL_GPL(kvm_write_guest_page); |
| 1366 | |
| 1367 | int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, |
| 1368 | unsigned long len) |
| 1369 | { |
| 1370 | gfn_t gfn = gpa >> PAGE_SHIFT; |
| 1371 | int seg; |
| 1372 | int offset = offset_in_page(gpa); |
| 1373 | int ret; |
| 1374 | |
| 1375 | while ((seg = next_segment(len, offset)) != 0) { |
| 1376 | ret = kvm_write_guest_page(kvm, gfn, data, offset, seg); |
| 1377 | if (ret < 0) |
| 1378 | return ret; |
| 1379 | offset = 0; |
| 1380 | len -= seg; |
| 1381 | data += seg; |
| 1382 | ++gfn; |
| 1383 | } |
| 1384 | return 0; |
| 1385 | } |
| 1386 | |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1387 | int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc, |
Andrew Honig | 1878fa4 | 2013-03-29 09:35:21 -0700 | [diff] [blame] | 1388 | gpa_t gpa, unsigned long len) |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1389 | { |
| 1390 | struct kvm_memslots *slots = kvm_memslots(kvm); |
| 1391 | int offset = offset_in_page(gpa); |
Andrew Honig | 1878fa4 | 2013-03-29 09:35:21 -0700 | [diff] [blame] | 1392 | gfn_t start_gfn = gpa >> PAGE_SHIFT; |
| 1393 | gfn_t end_gfn = (gpa + len - 1) >> PAGE_SHIFT; |
| 1394 | gfn_t nr_pages_needed = end_gfn - start_gfn + 1; |
| 1395 | gfn_t nr_pages_avail; |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1396 | |
| 1397 | ghc->gpa = gpa; |
| 1398 | ghc->generation = slots->generation; |
Andrew Honig | 1878fa4 | 2013-03-29 09:35:21 -0700 | [diff] [blame] | 1399 | ghc->len = len; |
| 1400 | ghc->memslot = gfn_to_memslot(kvm, start_gfn); |
| 1401 | ghc->hva = gfn_to_hva_many(ghc->memslot, start_gfn, &nr_pages_avail); |
| 1402 | if (!kvm_is_error_hva(ghc->hva) && nr_pages_avail >= nr_pages_needed) { |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1403 | ghc->hva += offset; |
Andrew Honig | 1878fa4 | 2013-03-29 09:35:21 -0700 | [diff] [blame] | 1404 | } else { |
| 1405 | /* |
| 1406 | * If the requested region crosses two memslots, we still |
| 1407 | * verify that the entire region is valid here. |
| 1408 | */ |
| 1409 | while (start_gfn <= end_gfn) { |
| 1410 | ghc->memslot = gfn_to_memslot(kvm, start_gfn); |
| 1411 | ghc->hva = gfn_to_hva_many(ghc->memslot, start_gfn, |
| 1412 | &nr_pages_avail); |
| 1413 | if (kvm_is_error_hva(ghc->hva)) |
| 1414 | return -EFAULT; |
| 1415 | start_gfn += nr_pages_avail; |
| 1416 | } |
| 1417 | /* Use the slow path for cross page reads and writes. */ |
| 1418 | ghc->memslot = NULL; |
| 1419 | } |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1420 | return 0; |
| 1421 | } |
| 1422 | EXPORT_SYMBOL_GPL(kvm_gfn_to_hva_cache_init); |
| 1423 | |
| 1424 | int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, |
| 1425 | void *data, unsigned long len) |
| 1426 | { |
| 1427 | struct kvm_memslots *slots = kvm_memslots(kvm); |
| 1428 | int r; |
| 1429 | |
Andrew Honig | 1878fa4 | 2013-03-29 09:35:21 -0700 | [diff] [blame] | 1430 | BUG_ON(len > ghc->len); |
| 1431 | |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1432 | if (slots->generation != ghc->generation) |
Andrew Honig | 1878fa4 | 2013-03-29 09:35:21 -0700 | [diff] [blame] | 1433 | kvm_gfn_to_hva_cache_init(kvm, ghc, ghc->gpa, ghc->len); |
| 1434 | |
| 1435 | if (unlikely(!ghc->memslot)) |
| 1436 | return kvm_write_guest(kvm, ghc->gpa, data, len); |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1437 | |
| 1438 | if (kvm_is_error_hva(ghc->hva)) |
| 1439 | return -EFAULT; |
| 1440 | |
Xiao Guangrong | 8b0cedf | 2011-05-15 23:22:04 +0800 | [diff] [blame] | 1441 | r = __copy_to_user((void __user *)ghc->hva, data, len); |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1442 | if (r) |
| 1443 | return -EFAULT; |
| 1444 | mark_page_dirty_in_slot(kvm, ghc->memslot, ghc->gpa >> PAGE_SHIFT); |
| 1445 | |
| 1446 | return 0; |
| 1447 | } |
| 1448 | EXPORT_SYMBOL_GPL(kvm_write_guest_cached); |
| 1449 | |
Gleb Natapov | e03b644 | 2011-07-11 15:28:11 -0400 | [diff] [blame] | 1450 | int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, |
| 1451 | void *data, unsigned long len) |
| 1452 | { |
| 1453 | struct kvm_memslots *slots = kvm_memslots(kvm); |
| 1454 | int r; |
| 1455 | |
Andrew Honig | 1878fa4 | 2013-03-29 09:35:21 -0700 | [diff] [blame] | 1456 | BUG_ON(len > ghc->len); |
| 1457 | |
Gleb Natapov | e03b644 | 2011-07-11 15:28:11 -0400 | [diff] [blame] | 1458 | if (slots->generation != ghc->generation) |
Andrew Honig | 1878fa4 | 2013-03-29 09:35:21 -0700 | [diff] [blame] | 1459 | kvm_gfn_to_hva_cache_init(kvm, ghc, ghc->gpa, ghc->len); |
| 1460 | |
| 1461 | if (unlikely(!ghc->memslot)) |
| 1462 | return kvm_read_guest(kvm, ghc->gpa, data, len); |
Gleb Natapov | e03b644 | 2011-07-11 15:28:11 -0400 | [diff] [blame] | 1463 | |
| 1464 | if (kvm_is_error_hva(ghc->hva)) |
| 1465 | return -EFAULT; |
| 1466 | |
| 1467 | r = __copy_from_user(data, (void __user *)ghc->hva, len); |
| 1468 | if (r) |
| 1469 | return -EFAULT; |
| 1470 | |
| 1471 | return 0; |
| 1472 | } |
| 1473 | EXPORT_SYMBOL_GPL(kvm_read_guest_cached); |
| 1474 | |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1475 | int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len) |
| 1476 | { |
Heiko Carstens | 3bcc8a8 | 2010-10-27 17:21:21 +0200 | [diff] [blame] | 1477 | return kvm_write_guest_page(kvm, gfn, (const void *) empty_zero_page, |
| 1478 | offset, len); |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1479 | } |
| 1480 | EXPORT_SYMBOL_GPL(kvm_clear_guest_page); |
| 1481 | |
| 1482 | int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len) |
| 1483 | { |
| 1484 | gfn_t gfn = gpa >> PAGE_SHIFT; |
| 1485 | int seg; |
| 1486 | int offset = offset_in_page(gpa); |
| 1487 | int ret; |
| 1488 | |
| 1489 | while ((seg = next_segment(len, offset)) != 0) { |
| 1490 | ret = kvm_clear_guest_page(kvm, gfn, offset, seg); |
| 1491 | if (ret < 0) |
| 1492 | return ret; |
| 1493 | offset = 0; |
| 1494 | len -= seg; |
| 1495 | ++gfn; |
| 1496 | } |
| 1497 | return 0; |
| 1498 | } |
| 1499 | EXPORT_SYMBOL_GPL(kvm_clear_guest); |
| 1500 | |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1501 | void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot, |
| 1502 | gfn_t gfn) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1503 | { |
Rusty Russell | 7e9d619 | 2007-07-31 20:41:14 +1000 | [diff] [blame] | 1504 | if (memslot && memslot->dirty_bitmap) { |
| 1505 | unsigned long rel_gfn = gfn - memslot->base_gfn; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1506 | |
Takuya Yoshikawa | 50e92b3 | 2012-01-04 15:06:43 +0900 | [diff] [blame] | 1507 | if (!test_and_set_bit_le(rel_gfn, memslot->dirty_bitmap)) |
Takuya Yoshikawa | 7850ac5 | 2011-11-14 18:23:34 +0900 | [diff] [blame] | 1508 | memslot->nr_dirty_pages++; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1509 | } |
| 1510 | } |
| 1511 | |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1512 | void mark_page_dirty(struct kvm *kvm, gfn_t gfn) |
| 1513 | { |
| 1514 | struct kvm_memory_slot *memslot; |
| 1515 | |
| 1516 | memslot = gfn_to_memslot(kvm, gfn); |
| 1517 | mark_page_dirty_in_slot(kvm, memslot, gfn); |
| 1518 | } |
| 1519 | |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1520 | /* |
| 1521 | * The vCPU has executed a HLT instruction with in-kernel mode enabled. |
| 1522 | */ |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 1523 | void kvm_vcpu_block(struct kvm_vcpu *vcpu) |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1524 | { |
Marcelo Tosatti | e5c239c | 2008-05-08 19:47:01 -0300 | [diff] [blame] | 1525 | DEFINE_WAIT(wait); |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1526 | |
Marcelo Tosatti | e5c239c | 2008-05-08 19:47:01 -0300 | [diff] [blame] | 1527 | for (;;) { |
| 1528 | prepare_to_wait(&vcpu->wq, &wait, TASK_INTERRUPTIBLE); |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1529 | |
Gleb Natapov | a1b3710 | 2009-07-09 15:33:52 +0300 | [diff] [blame] | 1530 | if (kvm_arch_vcpu_runnable(vcpu)) { |
Avi Kivity | a8eeb04 | 2010-05-10 12:34:53 +0300 | [diff] [blame] | 1531 | kvm_make_request(KVM_REQ_UNHALT, vcpu); |
Marcelo Tosatti | e5c239c | 2008-05-08 19:47:01 -0300 | [diff] [blame] | 1532 | break; |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 1533 | } |
Gleb Natapov | 09cec75 | 2009-03-23 15:11:44 +0200 | [diff] [blame] | 1534 | if (kvm_cpu_has_pending_timer(vcpu)) |
| 1535 | break; |
Marcelo Tosatti | e5c239c | 2008-05-08 19:47:01 -0300 | [diff] [blame] | 1536 | if (signal_pending(current)) |
| 1537 | break; |
| 1538 | |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1539 | schedule(); |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1540 | } |
| 1541 | |
Marcelo Tosatti | e5c239c | 2008-05-08 19:47:01 -0300 | [diff] [blame] | 1542 | finish_wait(&vcpu->wq, &wait); |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1543 | } |
| 1544 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1545 | void kvm_resched(struct kvm_vcpu *vcpu) |
| 1546 | { |
Yaozu Dong | 3fca036 | 2007-04-25 16:49:19 +0300 | [diff] [blame] | 1547 | if (!need_resched()) |
| 1548 | return; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1549 | cond_resched(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1550 | } |
| 1551 | EXPORT_SYMBOL_GPL(kvm_resched); |
| 1552 | |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 1553 | void kvm_vcpu_on_spin(struct kvm_vcpu *me) |
Zhai, Edwin | d255f4f | 2009-10-09 18:03:20 +0800 | [diff] [blame] | 1554 | { |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 1555 | struct kvm *kvm = me->kvm; |
| 1556 | struct kvm_vcpu *vcpu; |
| 1557 | int last_boosted_vcpu = me->kvm->last_boosted_vcpu; |
| 1558 | int yielded = 0; |
| 1559 | int pass; |
| 1560 | int i; |
Zhai, Edwin | d255f4f | 2009-10-09 18:03:20 +0800 | [diff] [blame] | 1561 | |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 1562 | /* |
| 1563 | * We boost the priority of a VCPU that is runnable but not |
| 1564 | * currently running, because it got preempted by something |
| 1565 | * else and called schedule in __vcpu_run. Hopefully that |
| 1566 | * VCPU is holding the lock that we need and will release it. |
| 1567 | * We approximate round-robin by starting at the last boosted VCPU. |
| 1568 | */ |
| 1569 | for (pass = 0; pass < 2 && !yielded; pass++) { |
| 1570 | kvm_for_each_vcpu(i, vcpu, kvm) { |
| 1571 | struct task_struct *task = NULL; |
| 1572 | struct pid *pid; |
| 1573 | if (!pass && i < last_boosted_vcpu) { |
| 1574 | i = last_boosted_vcpu; |
| 1575 | continue; |
| 1576 | } else if (pass && i > last_boosted_vcpu) |
| 1577 | break; |
| 1578 | if (vcpu == me) |
| 1579 | continue; |
| 1580 | if (waitqueue_active(&vcpu->wq)) |
| 1581 | continue; |
| 1582 | rcu_read_lock(); |
| 1583 | pid = rcu_dereference(vcpu->pid); |
| 1584 | if (pid) |
| 1585 | task = get_pid_task(vcpu->pid, PIDTYPE_PID); |
| 1586 | rcu_read_unlock(); |
| 1587 | if (!task) |
| 1588 | continue; |
| 1589 | if (task->flags & PF_VCPU) { |
| 1590 | put_task_struct(task); |
| 1591 | continue; |
| 1592 | } |
| 1593 | if (yield_to(task, 1)) { |
| 1594 | put_task_struct(task); |
| 1595 | kvm->last_boosted_vcpu = i; |
| 1596 | yielded = 1; |
| 1597 | break; |
| 1598 | } |
| 1599 | put_task_struct(task); |
| 1600 | } |
| 1601 | } |
Zhai, Edwin | d255f4f | 2009-10-09 18:03:20 +0800 | [diff] [blame] | 1602 | } |
| 1603 | EXPORT_SYMBOL_GPL(kvm_vcpu_on_spin); |
| 1604 | |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 1605 | static int kvm_vcpu_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 1606 | { |
| 1607 | struct kvm_vcpu *vcpu = vma->vm_file->private_data; |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 1608 | struct page *page; |
| 1609 | |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 1610 | if (vmf->pgoff == 0) |
Avi Kivity | 039576c | 2007-03-20 12:46:50 +0200 | [diff] [blame] | 1611 | page = virt_to_page(vcpu->run); |
Avi Kivity | 0956676 | 2008-01-23 18:14:23 +0200 | [diff] [blame] | 1612 | #ifdef CONFIG_X86 |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 1613 | else if (vmf->pgoff == KVM_PIO_PAGE_OFFSET) |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1614 | page = virt_to_page(vcpu->arch.pio_data); |
Avi Kivity | 0956676 | 2008-01-23 18:14:23 +0200 | [diff] [blame] | 1615 | #endif |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 1616 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
| 1617 | else if (vmf->pgoff == KVM_COALESCED_MMIO_PAGE_OFFSET) |
| 1618 | page = virt_to_page(vcpu->kvm->coalesced_mmio_ring); |
| 1619 | #endif |
Avi Kivity | 039576c | 2007-03-20 12:46:50 +0200 | [diff] [blame] | 1620 | else |
Carsten Otte | 5b1c149 | 2012-01-04 10:25:23 +0100 | [diff] [blame] | 1621 | return kvm_arch_vcpu_fault(vcpu, vmf); |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 1622 | get_page(page); |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 1623 | vmf->page = page; |
| 1624 | return 0; |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 1625 | } |
| 1626 | |
Alexey Dobriyan | f0f37e2 | 2009-09-27 22:29:37 +0400 | [diff] [blame] | 1627 | static const struct vm_operations_struct kvm_vcpu_vm_ops = { |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 1628 | .fault = kvm_vcpu_fault, |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 1629 | }; |
| 1630 | |
| 1631 | static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma) |
| 1632 | { |
| 1633 | vma->vm_ops = &kvm_vcpu_vm_ops; |
| 1634 | return 0; |
| 1635 | } |
| 1636 | |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1637 | static int kvm_vcpu_release(struct inode *inode, struct file *filp) |
| 1638 | { |
| 1639 | struct kvm_vcpu *vcpu = filp->private_data; |
| 1640 | |
Al Viro | 66c0b39 | 2008-04-19 20:33:56 +0100 | [diff] [blame] | 1641 | kvm_put_kvm(vcpu->kvm); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1642 | return 0; |
| 1643 | } |
| 1644 | |
Christian Borntraeger | 3d3aab1 | 2008-12-02 11:17:32 +0100 | [diff] [blame] | 1645 | static struct file_operations kvm_vcpu_fops = { |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1646 | .release = kvm_vcpu_release, |
| 1647 | .unlocked_ioctl = kvm_vcpu_ioctl, |
Alexander Graf | 1dda606 | 2011-06-08 02:45:37 +0200 | [diff] [blame] | 1648 | #ifdef CONFIG_COMPAT |
| 1649 | .compat_ioctl = kvm_vcpu_compat_ioctl, |
| 1650 | #endif |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 1651 | .mmap = kvm_vcpu_mmap, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 1652 | .llseek = noop_llseek, |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1653 | }; |
| 1654 | |
| 1655 | /* |
| 1656 | * Allocates an inode for the vcpu. |
| 1657 | */ |
| 1658 | static int create_vcpu_fd(struct kvm_vcpu *vcpu) |
| 1659 | { |
Roland Dreier | 628ff7c | 2009-12-18 09:41:24 -0800 | [diff] [blame] | 1660 | return anon_inode_getfd("kvm-vcpu", &kvm_vcpu_fops, vcpu, O_RDWR); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1661 | } |
| 1662 | |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 1663 | /* |
| 1664 | * Creates some virtual cpus. Good luck creating more than one. |
| 1665 | */ |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 1666 | static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, u32 id) |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 1667 | { |
| 1668 | int r; |
Gleb Natapov | 988a2ca | 2009-06-09 15:56:29 +0300 | [diff] [blame] | 1669 | struct kvm_vcpu *vcpu, *v; |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 1670 | |
Andy Honig | 60333ad | 2013-11-18 16:09:22 -0800 | [diff] [blame] | 1671 | if (id >= KVM_MAX_VCPUS) |
| 1672 | return -EINVAL; |
| 1673 | |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 1674 | vcpu = kvm_arch_vcpu_create(kvm, id); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 1675 | if (IS_ERR(vcpu)) |
| 1676 | return PTR_ERR(vcpu); |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 1677 | |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 1678 | preempt_notifier_init(&vcpu->preempt_notifier, &kvm_preempt_ops); |
| 1679 | |
Avi Kivity | 26e5215 | 2007-11-20 15:30:24 +0200 | [diff] [blame] | 1680 | r = kvm_arch_vcpu_setup(vcpu); |
| 1681 | if (r) |
Jan Kiszka | d780592 | 2011-05-23 10:33:05 +0200 | [diff] [blame] | 1682 | goto vcpu_destroy; |
Avi Kivity | 26e5215 | 2007-11-20 15:30:24 +0200 | [diff] [blame] | 1683 | |
Shaohua Li | 11ec280 | 2007-07-23 14:51:37 +0800 | [diff] [blame] | 1684 | mutex_lock(&kvm->lock); |
Avi Kivity | 3e51570 | 2012-03-05 14:23:29 +0200 | [diff] [blame] | 1685 | if (!kvm_vcpu_compatible(vcpu)) { |
| 1686 | r = -EINVAL; |
| 1687 | goto unlock_vcpu_destroy; |
| 1688 | } |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 1689 | if (atomic_read(&kvm->online_vcpus) == KVM_MAX_VCPUS) { |
| 1690 | r = -EINVAL; |
Jan Kiszka | d780592 | 2011-05-23 10:33:05 +0200 | [diff] [blame] | 1691 | goto unlock_vcpu_destroy; |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 1692 | } |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 1693 | |
Gleb Natapov | 988a2ca | 2009-06-09 15:56:29 +0300 | [diff] [blame] | 1694 | kvm_for_each_vcpu(r, v, kvm) |
| 1695 | if (v->vcpu_id == id) { |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 1696 | r = -EEXIST; |
Jan Kiszka | d780592 | 2011-05-23 10:33:05 +0200 | [diff] [blame] | 1697 | goto unlock_vcpu_destroy; |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 1698 | } |
| 1699 | |
| 1700 | BUG_ON(kvm->vcpus[atomic_read(&kvm->online_vcpus)]); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 1701 | |
| 1702 | /* Now it's all set up, let userspace reach it */ |
Al Viro | 66c0b39 | 2008-04-19 20:33:56 +0100 | [diff] [blame] | 1703 | kvm_get_kvm(kvm); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1704 | r = create_vcpu_fd(vcpu); |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 1705 | if (r < 0) { |
| 1706 | kvm_put_kvm(kvm); |
Jan Kiszka | d780592 | 2011-05-23 10:33:05 +0200 | [diff] [blame] | 1707 | goto unlock_vcpu_destroy; |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 1708 | } |
| 1709 | |
| 1710 | kvm->vcpus[atomic_read(&kvm->online_vcpus)] = vcpu; |
| 1711 | smp_wmb(); |
| 1712 | atomic_inc(&kvm->online_vcpus); |
| 1713 | |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 1714 | mutex_unlock(&kvm->lock); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1715 | return r; |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 1716 | |
Jan Kiszka | d780592 | 2011-05-23 10:33:05 +0200 | [diff] [blame] | 1717 | unlock_vcpu_destroy: |
Glauber Costa | 7d8fece | 2008-09-17 23:16:59 -0300 | [diff] [blame] | 1718 | mutex_unlock(&kvm->lock); |
Jan Kiszka | d780592 | 2011-05-23 10:33:05 +0200 | [diff] [blame] | 1719 | vcpu_destroy: |
Hollis Blanchard | d40ccc6 | 2007-11-19 14:04:43 -0600 | [diff] [blame] | 1720 | kvm_arch_vcpu_destroy(vcpu); |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 1721 | return r; |
| 1722 | } |
| 1723 | |
Avi Kivity | 1961d27 | 2007-03-05 19:46:05 +0200 | [diff] [blame] | 1724 | static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset) |
| 1725 | { |
| 1726 | if (sigset) { |
| 1727 | sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP)); |
| 1728 | vcpu->sigset_active = 1; |
| 1729 | vcpu->sigset = *sigset; |
| 1730 | } else |
| 1731 | vcpu->sigset_active = 0; |
| 1732 | return 0; |
| 1733 | } |
| 1734 | |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1735 | static long kvm_vcpu_ioctl(struct file *filp, |
| 1736 | unsigned int ioctl, unsigned long arg) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1737 | { |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1738 | struct kvm_vcpu *vcpu = filp->private_data; |
Al Viro | 2f36698 | 2007-02-09 16:38:35 +0000 | [diff] [blame] | 1739 | void __user *argp = (void __user *)arg; |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1740 | int r; |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 1741 | struct kvm_fpu *fpu = NULL; |
| 1742 | struct kvm_sregs *kvm_sregs = NULL; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1743 | |
Avi Kivity | 6d4e4c4 | 2007-11-21 16:41:05 +0200 | [diff] [blame] | 1744 | if (vcpu->kvm->mm != current->mm) |
| 1745 | return -EIO; |
Avi Kivity | 2122ff5 | 2010-05-13 11:25:04 +0300 | [diff] [blame] | 1746 | |
| 1747 | #if defined(CONFIG_S390) || defined(CONFIG_PPC) |
| 1748 | /* |
| 1749 | * Special cases: vcpu ioctls that are asynchronous to vcpu execution, |
| 1750 | * so vcpu_load() would break it. |
| 1751 | */ |
| 1752 | if (ioctl == KVM_S390_INTERRUPT || ioctl == KVM_INTERRUPT) |
| 1753 | return kvm_arch_vcpu_ioctl(filp, ioctl, arg); |
| 1754 | #endif |
| 1755 | |
| 1756 | |
| 1757 | vcpu_load(vcpu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1758 | switch (ioctl) { |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 1759 | case KVM_RUN: |
Avi Kivity | f0fe510 | 2007-03-07 13:11:17 +0200 | [diff] [blame] | 1760 | r = -EINVAL; |
| 1761 | if (arg) |
| 1762 | goto out; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 1763 | r = kvm_arch_vcpu_ioctl_run(vcpu, vcpu->run); |
Gleb Natapov | 64be500 | 2010-10-24 16:49:08 +0200 | [diff] [blame] | 1764 | trace_kvm_userspace_exit(vcpu->run->exit_reason, r); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1765 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1766 | case KVM_GET_REGS: { |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1767 | struct kvm_regs *kvm_regs; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1768 | |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1769 | r = -ENOMEM; |
| 1770 | kvm_regs = kzalloc(sizeof(struct kvm_regs), GFP_KERNEL); |
| 1771 | if (!kvm_regs) |
| 1772 | goto out; |
| 1773 | r = kvm_arch_vcpu_ioctl_get_regs(vcpu, kvm_regs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1774 | if (r) |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1775 | goto out_free1; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1776 | r = -EFAULT; |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1777 | if (copy_to_user(argp, kvm_regs, sizeof(struct kvm_regs))) |
| 1778 | goto out_free1; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1779 | r = 0; |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1780 | out_free1: |
| 1781 | kfree(kvm_regs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1782 | break; |
| 1783 | } |
| 1784 | case KVM_SET_REGS: { |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1785 | struct kvm_regs *kvm_regs; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1786 | |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1787 | r = -ENOMEM; |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 1788 | kvm_regs = memdup_user(argp, sizeof(*kvm_regs)); |
| 1789 | if (IS_ERR(kvm_regs)) { |
| 1790 | r = PTR_ERR(kvm_regs); |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1791 | goto out; |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 1792 | } |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1793 | r = kvm_arch_vcpu_ioctl_set_regs(vcpu, kvm_regs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1794 | if (r) |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1795 | goto out_free2; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1796 | r = 0; |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1797 | out_free2: |
| 1798 | kfree(kvm_regs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1799 | break; |
| 1800 | } |
| 1801 | case KVM_GET_SREGS: { |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 1802 | kvm_sregs = kzalloc(sizeof(struct kvm_sregs), GFP_KERNEL); |
| 1803 | r = -ENOMEM; |
| 1804 | if (!kvm_sregs) |
| 1805 | goto out; |
| 1806 | r = kvm_arch_vcpu_ioctl_get_sregs(vcpu, kvm_sregs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1807 | if (r) |
| 1808 | goto out; |
| 1809 | r = -EFAULT; |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 1810 | if (copy_to_user(argp, kvm_sregs, sizeof(struct kvm_sregs))) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1811 | goto out; |
| 1812 | r = 0; |
| 1813 | break; |
| 1814 | } |
| 1815 | case KVM_SET_SREGS: { |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 1816 | kvm_sregs = memdup_user(argp, sizeof(*kvm_sregs)); |
| 1817 | if (IS_ERR(kvm_sregs)) { |
| 1818 | r = PTR_ERR(kvm_sregs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1819 | goto out; |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 1820 | } |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 1821 | r = kvm_arch_vcpu_ioctl_set_sregs(vcpu, kvm_sregs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1822 | if (r) |
| 1823 | goto out; |
| 1824 | r = 0; |
| 1825 | break; |
| 1826 | } |
Marcelo Tosatti | 62d9f0d | 2008-04-11 13:24:45 -0300 | [diff] [blame] | 1827 | case KVM_GET_MP_STATE: { |
| 1828 | struct kvm_mp_state mp_state; |
| 1829 | |
| 1830 | r = kvm_arch_vcpu_ioctl_get_mpstate(vcpu, &mp_state); |
| 1831 | if (r) |
| 1832 | goto out; |
| 1833 | r = -EFAULT; |
| 1834 | if (copy_to_user(argp, &mp_state, sizeof mp_state)) |
| 1835 | goto out; |
| 1836 | r = 0; |
| 1837 | break; |
| 1838 | } |
| 1839 | case KVM_SET_MP_STATE: { |
| 1840 | struct kvm_mp_state mp_state; |
| 1841 | |
| 1842 | r = -EFAULT; |
| 1843 | if (copy_from_user(&mp_state, argp, sizeof mp_state)) |
| 1844 | goto out; |
| 1845 | r = kvm_arch_vcpu_ioctl_set_mpstate(vcpu, &mp_state); |
| 1846 | if (r) |
| 1847 | goto out; |
| 1848 | r = 0; |
| 1849 | break; |
| 1850 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1851 | case KVM_TRANSLATE: { |
| 1852 | struct kvm_translation tr; |
| 1853 | |
| 1854 | r = -EFAULT; |
Al Viro | 2f36698 | 2007-02-09 16:38:35 +0000 | [diff] [blame] | 1855 | if (copy_from_user(&tr, argp, sizeof tr)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1856 | goto out; |
Zhang Xiantao | 8b00679 | 2007-11-16 13:05:55 +0800 | [diff] [blame] | 1857 | r = kvm_arch_vcpu_ioctl_translate(vcpu, &tr); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1858 | if (r) |
| 1859 | goto out; |
| 1860 | r = -EFAULT; |
Al Viro | 2f36698 | 2007-02-09 16:38:35 +0000 | [diff] [blame] | 1861 | if (copy_to_user(argp, &tr, sizeof tr)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1862 | goto out; |
| 1863 | r = 0; |
| 1864 | break; |
| 1865 | } |
Jan Kiszka | d0bfb94 | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 1866 | case KVM_SET_GUEST_DEBUG: { |
| 1867 | struct kvm_guest_debug dbg; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1868 | |
| 1869 | r = -EFAULT; |
Al Viro | 2f36698 | 2007-02-09 16:38:35 +0000 | [diff] [blame] | 1870 | if (copy_from_user(&dbg, argp, sizeof dbg)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1871 | goto out; |
Jan Kiszka | d0bfb94 | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 1872 | r = kvm_arch_vcpu_ioctl_set_guest_debug(vcpu, &dbg); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1873 | if (r) |
| 1874 | goto out; |
| 1875 | r = 0; |
| 1876 | break; |
| 1877 | } |
Avi Kivity | 1961d27 | 2007-03-05 19:46:05 +0200 | [diff] [blame] | 1878 | case KVM_SET_SIGNAL_MASK: { |
| 1879 | struct kvm_signal_mask __user *sigmask_arg = argp; |
| 1880 | struct kvm_signal_mask kvm_sigmask; |
| 1881 | sigset_t sigset, *p; |
| 1882 | |
| 1883 | p = NULL; |
| 1884 | if (argp) { |
| 1885 | r = -EFAULT; |
| 1886 | if (copy_from_user(&kvm_sigmask, argp, |
| 1887 | sizeof kvm_sigmask)) |
| 1888 | goto out; |
| 1889 | r = -EINVAL; |
| 1890 | if (kvm_sigmask.len != sizeof sigset) |
| 1891 | goto out; |
| 1892 | r = -EFAULT; |
| 1893 | if (copy_from_user(&sigset, sigmask_arg->sigset, |
| 1894 | sizeof sigset)) |
| 1895 | goto out; |
| 1896 | p = &sigset; |
| 1897 | } |
Andi Kleen | 376d41f | 2010-06-10 13:10:47 +0200 | [diff] [blame] | 1898 | r = kvm_vcpu_ioctl_set_sigmask(vcpu, p); |
Avi Kivity | 1961d27 | 2007-03-05 19:46:05 +0200 | [diff] [blame] | 1899 | break; |
| 1900 | } |
Avi Kivity | b883673 | 2007-04-01 16:34:31 +0300 | [diff] [blame] | 1901 | case KVM_GET_FPU: { |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 1902 | fpu = kzalloc(sizeof(struct kvm_fpu), GFP_KERNEL); |
| 1903 | r = -ENOMEM; |
| 1904 | if (!fpu) |
| 1905 | goto out; |
| 1906 | r = kvm_arch_vcpu_ioctl_get_fpu(vcpu, fpu); |
Avi Kivity | b883673 | 2007-04-01 16:34:31 +0300 | [diff] [blame] | 1907 | if (r) |
| 1908 | goto out; |
| 1909 | r = -EFAULT; |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 1910 | if (copy_to_user(argp, fpu, sizeof(struct kvm_fpu))) |
Avi Kivity | b883673 | 2007-04-01 16:34:31 +0300 | [diff] [blame] | 1911 | goto out; |
| 1912 | r = 0; |
| 1913 | break; |
| 1914 | } |
| 1915 | case KVM_SET_FPU: { |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 1916 | fpu = memdup_user(argp, sizeof(*fpu)); |
| 1917 | if (IS_ERR(fpu)) { |
| 1918 | r = PTR_ERR(fpu); |
Avi Kivity | b883673 | 2007-04-01 16:34:31 +0300 | [diff] [blame] | 1919 | goto out; |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 1920 | } |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 1921 | r = kvm_arch_vcpu_ioctl_set_fpu(vcpu, fpu); |
Avi Kivity | b883673 | 2007-04-01 16:34:31 +0300 | [diff] [blame] | 1922 | if (r) |
| 1923 | goto out; |
| 1924 | r = 0; |
| 1925 | break; |
| 1926 | } |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1927 | default: |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1928 | r = kvm_arch_vcpu_ioctl(filp, ioctl, arg); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1929 | } |
| 1930 | out: |
Avi Kivity | 2122ff5 | 2010-05-13 11:25:04 +0300 | [diff] [blame] | 1931 | vcpu_put(vcpu); |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 1932 | kfree(fpu); |
| 1933 | kfree(kvm_sregs); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1934 | return r; |
| 1935 | } |
| 1936 | |
Alexander Graf | 1dda606 | 2011-06-08 02:45:37 +0200 | [diff] [blame] | 1937 | #ifdef CONFIG_COMPAT |
| 1938 | static long kvm_vcpu_compat_ioctl(struct file *filp, |
| 1939 | unsigned int ioctl, unsigned long arg) |
| 1940 | { |
| 1941 | struct kvm_vcpu *vcpu = filp->private_data; |
| 1942 | void __user *argp = compat_ptr(arg); |
| 1943 | int r; |
| 1944 | |
| 1945 | if (vcpu->kvm->mm != current->mm) |
| 1946 | return -EIO; |
| 1947 | |
| 1948 | switch (ioctl) { |
| 1949 | case KVM_SET_SIGNAL_MASK: { |
| 1950 | struct kvm_signal_mask __user *sigmask_arg = argp; |
| 1951 | struct kvm_signal_mask kvm_sigmask; |
| 1952 | compat_sigset_t csigset; |
| 1953 | sigset_t sigset; |
| 1954 | |
| 1955 | if (argp) { |
| 1956 | r = -EFAULT; |
| 1957 | if (copy_from_user(&kvm_sigmask, argp, |
| 1958 | sizeof kvm_sigmask)) |
| 1959 | goto out; |
| 1960 | r = -EINVAL; |
| 1961 | if (kvm_sigmask.len != sizeof csigset) |
| 1962 | goto out; |
| 1963 | r = -EFAULT; |
| 1964 | if (copy_from_user(&csigset, sigmask_arg->sigset, |
| 1965 | sizeof csigset)) |
| 1966 | goto out; |
| 1967 | } |
| 1968 | sigset_from_compat(&sigset, &csigset); |
| 1969 | r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset); |
| 1970 | break; |
| 1971 | } |
| 1972 | default: |
| 1973 | r = kvm_vcpu_ioctl(filp, ioctl, arg); |
| 1974 | } |
| 1975 | |
| 1976 | out: |
| 1977 | return r; |
| 1978 | } |
| 1979 | #endif |
| 1980 | |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1981 | static long kvm_vm_ioctl(struct file *filp, |
| 1982 | unsigned int ioctl, unsigned long arg) |
| 1983 | { |
| 1984 | struct kvm *kvm = filp->private_data; |
| 1985 | void __user *argp = (void __user *)arg; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 1986 | int r; |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1987 | |
Avi Kivity | 6d4e4c4 | 2007-11-21 16:41:05 +0200 | [diff] [blame] | 1988 | if (kvm->mm != current->mm) |
| 1989 | return -EIO; |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1990 | switch (ioctl) { |
| 1991 | case KVM_CREATE_VCPU: |
| 1992 | r = kvm_vm_ioctl_create_vcpu(kvm, arg); |
| 1993 | if (r < 0) |
| 1994 | goto out; |
| 1995 | break; |
Izik Eidus | 6fc138d | 2007-10-09 19:20:39 +0200 | [diff] [blame] | 1996 | case KVM_SET_USER_MEMORY_REGION: { |
| 1997 | struct kvm_userspace_memory_region kvm_userspace_mem; |
| 1998 | |
| 1999 | r = -EFAULT; |
| 2000 | if (copy_from_user(&kvm_userspace_mem, argp, |
| 2001 | sizeof kvm_userspace_mem)) |
| 2002 | goto out; |
| 2003 | |
| 2004 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 1); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2005 | if (r) |
| 2006 | goto out; |
| 2007 | break; |
| 2008 | } |
| 2009 | case KVM_GET_DIRTY_LOG: { |
| 2010 | struct kvm_dirty_log log; |
| 2011 | |
| 2012 | r = -EFAULT; |
Al Viro | 2f36698 | 2007-02-09 16:38:35 +0000 | [diff] [blame] | 2013 | if (copy_from_user(&log, argp, sizeof log)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2014 | goto out; |
Avi Kivity | 2c6f5df | 2007-02-20 18:27:58 +0200 | [diff] [blame] | 2015 | r = kvm_vm_ioctl_get_dirty_log(kvm, &log); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2016 | if (r) |
| 2017 | goto out; |
| 2018 | break; |
| 2019 | } |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2020 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
| 2021 | case KVM_REGISTER_COALESCED_MMIO: { |
| 2022 | struct kvm_coalesced_mmio_zone zone; |
| 2023 | r = -EFAULT; |
| 2024 | if (copy_from_user(&zone, argp, sizeof zone)) |
| 2025 | goto out; |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2026 | r = kvm_vm_ioctl_register_coalesced_mmio(kvm, &zone); |
| 2027 | if (r) |
| 2028 | goto out; |
| 2029 | r = 0; |
| 2030 | break; |
| 2031 | } |
| 2032 | case KVM_UNREGISTER_COALESCED_MMIO: { |
| 2033 | struct kvm_coalesced_mmio_zone zone; |
| 2034 | r = -EFAULT; |
| 2035 | if (copy_from_user(&zone, argp, sizeof zone)) |
| 2036 | goto out; |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2037 | r = kvm_vm_ioctl_unregister_coalesced_mmio(kvm, &zone); |
| 2038 | if (r) |
| 2039 | goto out; |
| 2040 | r = 0; |
| 2041 | break; |
| 2042 | } |
| 2043 | #endif |
Gregory Haskins | 721eecb | 2009-05-20 10:30:49 -0400 | [diff] [blame] | 2044 | case KVM_IRQFD: { |
| 2045 | struct kvm_irqfd data; |
| 2046 | |
| 2047 | r = -EFAULT; |
| 2048 | if (copy_from_user(&data, argp, sizeof data)) |
| 2049 | goto out; |
| 2050 | r = kvm_irqfd(kvm, data.fd, data.gsi, data.flags); |
| 2051 | break; |
| 2052 | } |
Gregory Haskins | d34e6b1 | 2009-07-07 17:08:49 -0400 | [diff] [blame] | 2053 | case KVM_IOEVENTFD: { |
| 2054 | struct kvm_ioeventfd data; |
| 2055 | |
| 2056 | r = -EFAULT; |
| 2057 | if (copy_from_user(&data, argp, sizeof data)) |
| 2058 | goto out; |
| 2059 | r = kvm_ioeventfd(kvm, &data); |
| 2060 | break; |
| 2061 | } |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 2062 | #ifdef CONFIG_KVM_APIC_ARCHITECTURE |
| 2063 | case KVM_SET_BOOT_CPU_ID: |
| 2064 | r = 0; |
Marcelo Tosatti | 894a9c5 | 2009-06-23 15:05:14 -0300 | [diff] [blame] | 2065 | mutex_lock(&kvm->lock); |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 2066 | if (atomic_read(&kvm->online_vcpus) != 0) |
| 2067 | r = -EBUSY; |
| 2068 | else |
| 2069 | kvm->bsp_vcpu_id = arg; |
Marcelo Tosatti | 894a9c5 | 2009-06-23 15:05:14 -0300 | [diff] [blame] | 2070 | mutex_unlock(&kvm->lock); |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 2071 | break; |
| 2072 | #endif |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2073 | default: |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2074 | r = kvm_arch_vm_ioctl(filp, ioctl, arg); |
Avi Kivity | bfd99ff | 2009-08-26 14:57:50 +0300 | [diff] [blame] | 2075 | if (r == -ENOTTY) |
| 2076 | r = kvm_vm_ioctl_assigned_device(kvm, ioctl, arg); |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2077 | } |
| 2078 | out: |
| 2079 | return r; |
| 2080 | } |
| 2081 | |
Arnd Bergmann | 6ff5894 | 2009-10-22 14:19:27 +0200 | [diff] [blame] | 2082 | #ifdef CONFIG_COMPAT |
| 2083 | struct compat_kvm_dirty_log { |
| 2084 | __u32 slot; |
| 2085 | __u32 padding1; |
| 2086 | union { |
| 2087 | compat_uptr_t dirty_bitmap; /* one bit per page */ |
| 2088 | __u64 padding2; |
| 2089 | }; |
| 2090 | }; |
| 2091 | |
| 2092 | static long kvm_vm_compat_ioctl(struct file *filp, |
| 2093 | unsigned int ioctl, unsigned long arg) |
| 2094 | { |
| 2095 | struct kvm *kvm = filp->private_data; |
| 2096 | int r; |
| 2097 | |
| 2098 | if (kvm->mm != current->mm) |
| 2099 | return -EIO; |
| 2100 | switch (ioctl) { |
| 2101 | case KVM_GET_DIRTY_LOG: { |
| 2102 | struct compat_kvm_dirty_log compat_log; |
| 2103 | struct kvm_dirty_log log; |
| 2104 | |
| 2105 | r = -EFAULT; |
| 2106 | if (copy_from_user(&compat_log, (void __user *)arg, |
| 2107 | sizeof(compat_log))) |
| 2108 | goto out; |
| 2109 | log.slot = compat_log.slot; |
| 2110 | log.padding1 = compat_log.padding1; |
| 2111 | log.padding2 = compat_log.padding2; |
| 2112 | log.dirty_bitmap = compat_ptr(compat_log.dirty_bitmap); |
| 2113 | |
| 2114 | r = kvm_vm_ioctl_get_dirty_log(kvm, &log); |
| 2115 | if (r) |
| 2116 | goto out; |
| 2117 | break; |
| 2118 | } |
| 2119 | default: |
| 2120 | r = kvm_vm_ioctl(filp, ioctl, arg); |
| 2121 | } |
| 2122 | |
| 2123 | out: |
| 2124 | return r; |
| 2125 | } |
| 2126 | #endif |
| 2127 | |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 2128 | static int kvm_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf) |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2129 | { |
Marcelo Tosatti | 777b3f4 | 2008-09-16 20:54:46 -0300 | [diff] [blame] | 2130 | struct page *page[1]; |
| 2131 | unsigned long addr; |
| 2132 | int npages; |
| 2133 | gfn_t gfn = vmf->pgoff; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2134 | struct kvm *kvm = vma->vm_file->private_data; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2135 | |
Marcelo Tosatti | 777b3f4 | 2008-09-16 20:54:46 -0300 | [diff] [blame] | 2136 | addr = gfn_to_hva(kvm, gfn); |
| 2137 | if (kvm_is_error_hva(addr)) |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 2138 | return VM_FAULT_SIGBUS; |
Marcelo Tosatti | 777b3f4 | 2008-09-16 20:54:46 -0300 | [diff] [blame] | 2139 | |
| 2140 | npages = get_user_pages(current, current->mm, addr, 1, 1, 0, page, |
| 2141 | NULL); |
| 2142 | if (unlikely(npages != 1)) |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 2143 | return VM_FAULT_SIGBUS; |
Marcelo Tosatti | 777b3f4 | 2008-09-16 20:54:46 -0300 | [diff] [blame] | 2144 | |
| 2145 | vmf->page = page[0]; |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 2146 | return 0; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2147 | } |
| 2148 | |
Alexey Dobriyan | f0f37e2 | 2009-09-27 22:29:37 +0400 | [diff] [blame] | 2149 | static const struct vm_operations_struct kvm_vm_vm_ops = { |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 2150 | .fault = kvm_vm_fault, |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2151 | }; |
| 2152 | |
| 2153 | static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma) |
| 2154 | { |
| 2155 | vma->vm_ops = &kvm_vm_vm_ops; |
| 2156 | return 0; |
| 2157 | } |
| 2158 | |
Christian Borntraeger | 3d3aab1 | 2008-12-02 11:17:32 +0100 | [diff] [blame] | 2159 | static struct file_operations kvm_vm_fops = { |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2160 | .release = kvm_vm_release, |
| 2161 | .unlocked_ioctl = kvm_vm_ioctl, |
Arnd Bergmann | 6ff5894 | 2009-10-22 14:19:27 +0200 | [diff] [blame] | 2162 | #ifdef CONFIG_COMPAT |
| 2163 | .compat_ioctl = kvm_vm_compat_ioctl, |
| 2164 | #endif |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2165 | .mmap = kvm_vm_mmap, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 2166 | .llseek = noop_llseek, |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2167 | }; |
| 2168 | |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 2169 | static int kvm_dev_ioctl_create_vm(unsigned long type) |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2170 | { |
Heiko Carstens | aac8763 | 2010-10-27 17:22:10 +0200 | [diff] [blame] | 2171 | int r; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2172 | struct kvm *kvm; |
| 2173 | |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 2174 | kvm = kvm_create_vm(type); |
Avi Kivity | d6d2816 | 2007-06-28 08:38:16 -0400 | [diff] [blame] | 2175 | if (IS_ERR(kvm)) |
| 2176 | return PTR_ERR(kvm); |
Takuya Yoshikawa | 6ce5a09 | 2010-03-15 22:13:30 +0900 | [diff] [blame] | 2177 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
| 2178 | r = kvm_coalesced_mmio_init(kvm); |
| 2179 | if (r < 0) { |
| 2180 | kvm_put_kvm(kvm); |
| 2181 | return r; |
| 2182 | } |
| 2183 | #endif |
Heiko Carstens | aac8763 | 2010-10-27 17:22:10 +0200 | [diff] [blame] | 2184 | r = anon_inode_getfd("kvm-vm", &kvm_vm_fops, kvm, O_RDWR); |
| 2185 | if (r < 0) |
Al Viro | 66c0b39 | 2008-04-19 20:33:56 +0100 | [diff] [blame] | 2186 | kvm_put_kvm(kvm); |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2187 | |
Heiko Carstens | aac8763 | 2010-10-27 17:22:10 +0200 | [diff] [blame] | 2188 | return r; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2189 | } |
| 2190 | |
Avi Kivity | 1a811b6 | 2008-12-08 18:25:27 +0200 | [diff] [blame] | 2191 | static long kvm_dev_ioctl_check_extension_generic(long arg) |
| 2192 | { |
| 2193 | switch (arg) { |
Avi Kivity | ca9edae | 2008-12-08 18:29:29 +0200 | [diff] [blame] | 2194 | case KVM_CAP_USER_MEMORY: |
Avi Kivity | 1a811b6 | 2008-12-08 18:25:27 +0200 | [diff] [blame] | 2195 | case KVM_CAP_DESTROY_MEMORY_REGION_WORKS: |
Jan Kiszka | 4cd481f | 2009-04-13 11:59:32 +0200 | [diff] [blame] | 2196 | case KVM_CAP_JOIN_MEMORY_REGIONS_WORKS: |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 2197 | #ifdef CONFIG_KVM_APIC_ARCHITECTURE |
| 2198 | case KVM_CAP_SET_BOOT_CPU_ID: |
| 2199 | #endif |
Avi Kivity | a9c7399 | 2009-11-04 11:54:59 +0200 | [diff] [blame] | 2200 | case KVM_CAP_INTERNAL_ERROR_DATA: |
Avi Kivity | 1a811b6 | 2008-12-08 18:25:27 +0200 | [diff] [blame] | 2201 | return 1; |
Avi Kivity | 399ec80 | 2008-11-19 13:58:46 +0200 | [diff] [blame] | 2202 | #ifdef CONFIG_HAVE_KVM_IRQCHIP |
| 2203 | case KVM_CAP_IRQ_ROUTING: |
Sheng Yang | 3646314 | 2009-03-16 16:33:43 +0800 | [diff] [blame] | 2204 | return KVM_MAX_IRQ_ROUTES; |
Avi Kivity | 399ec80 | 2008-11-19 13:58:46 +0200 | [diff] [blame] | 2205 | #endif |
Avi Kivity | 1a811b6 | 2008-12-08 18:25:27 +0200 | [diff] [blame] | 2206 | default: |
| 2207 | break; |
| 2208 | } |
| 2209 | return kvm_dev_ioctl_check_extension(arg); |
| 2210 | } |
| 2211 | |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2212 | static long kvm_dev_ioctl(struct file *filp, |
| 2213 | unsigned int ioctl, unsigned long arg) |
| 2214 | { |
Avi Kivity | 07c45a3 | 2007-03-07 13:05:38 +0200 | [diff] [blame] | 2215 | long r = -EINVAL; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2216 | |
| 2217 | switch (ioctl) { |
| 2218 | case KVM_GET_API_VERSION: |
Avi Kivity | f0fe510 | 2007-03-07 13:11:17 +0200 | [diff] [blame] | 2219 | r = -EINVAL; |
| 2220 | if (arg) |
| 2221 | goto out; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2222 | r = KVM_API_VERSION; |
| 2223 | break; |
| 2224 | case KVM_CREATE_VM: |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 2225 | r = kvm_dev_ioctl_create_vm(arg); |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2226 | break; |
Zhang Xiantao | 018d00d | 2007-11-15 23:07:47 +0800 | [diff] [blame] | 2227 | case KVM_CHECK_EXTENSION: |
Avi Kivity | 1a811b6 | 2008-12-08 18:25:27 +0200 | [diff] [blame] | 2228 | r = kvm_dev_ioctl_check_extension_generic(arg); |
Avi Kivity | 5d308f4 | 2007-03-01 17:56:20 +0200 | [diff] [blame] | 2229 | break; |
Avi Kivity | 07c45a3 | 2007-03-07 13:05:38 +0200 | [diff] [blame] | 2230 | case KVM_GET_VCPU_MMAP_SIZE: |
| 2231 | r = -EINVAL; |
| 2232 | if (arg) |
| 2233 | goto out; |
Avi Kivity | adb1ff4 | 2008-01-24 15:13:08 +0200 | [diff] [blame] | 2234 | r = PAGE_SIZE; /* struct kvm_run */ |
| 2235 | #ifdef CONFIG_X86 |
| 2236 | r += PAGE_SIZE; /* pio data page */ |
| 2237 | #endif |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2238 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
| 2239 | r += PAGE_SIZE; /* coalesced mmio ring page */ |
| 2240 | #endif |
Avi Kivity | 07c45a3 | 2007-03-07 13:05:38 +0200 | [diff] [blame] | 2241 | break; |
Feng(Eric) Liu | d4c9ff2 | 2008-04-10 08:47:53 -0400 | [diff] [blame] | 2242 | case KVM_TRACE_ENABLE: |
| 2243 | case KVM_TRACE_PAUSE: |
| 2244 | case KVM_TRACE_DISABLE: |
Marcelo Tosatti | 2023a29 | 2009-06-18 11:47:28 -0300 | [diff] [blame] | 2245 | r = -EOPNOTSUPP; |
Feng(Eric) Liu | d4c9ff2 | 2008-04-10 08:47:53 -0400 | [diff] [blame] | 2246 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2247 | default: |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 2248 | return kvm_arch_dev_ioctl(filp, ioctl, arg); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2249 | } |
| 2250 | out: |
| 2251 | return r; |
| 2252 | } |
| 2253 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2254 | static struct file_operations kvm_chardev_ops = { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2255 | .unlocked_ioctl = kvm_dev_ioctl, |
| 2256 | .compat_ioctl = kvm_dev_ioctl, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 2257 | .llseek = noop_llseek, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2258 | }; |
| 2259 | |
| 2260 | static struct miscdevice kvm_dev = { |
Avi Kivity | bbe4432 | 2007-03-04 13:27:36 +0200 | [diff] [blame] | 2261 | KVM_MINOR, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2262 | "kvm", |
| 2263 | &kvm_chardev_ops, |
| 2264 | }; |
| 2265 | |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2266 | static void hardware_enable_nolock(void *junk) |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 2267 | { |
| 2268 | int cpu = raw_smp_processor_id(); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2269 | int r; |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 2270 | |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 2271 | if (cpumask_test_cpu(cpu, cpus_hardware_enabled)) |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 2272 | return; |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2273 | |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 2274 | cpumask_set_cpu(cpu, cpus_hardware_enabled); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2275 | |
| 2276 | r = kvm_arch_hardware_enable(NULL); |
| 2277 | |
| 2278 | if (r) { |
| 2279 | cpumask_clear_cpu(cpu, cpus_hardware_enabled); |
| 2280 | atomic_inc(&hardware_enable_failed); |
| 2281 | printk(KERN_INFO "kvm: enabling virtualization on " |
| 2282 | "CPU%d failed\n", cpu); |
| 2283 | } |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 2284 | } |
| 2285 | |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2286 | static void hardware_enable(void *junk) |
| 2287 | { |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2288 | raw_spin_lock(&kvm_lock); |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2289 | hardware_enable_nolock(junk); |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2290 | raw_spin_unlock(&kvm_lock); |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2291 | } |
| 2292 | |
| 2293 | static void hardware_disable_nolock(void *junk) |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 2294 | { |
| 2295 | int cpu = raw_smp_processor_id(); |
| 2296 | |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 2297 | if (!cpumask_test_cpu(cpu, cpus_hardware_enabled)) |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 2298 | return; |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 2299 | cpumask_clear_cpu(cpu, cpus_hardware_enabled); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 2300 | kvm_arch_hardware_disable(NULL); |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 2301 | } |
| 2302 | |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2303 | static void hardware_disable(void *junk) |
| 2304 | { |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2305 | raw_spin_lock(&kvm_lock); |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2306 | hardware_disable_nolock(junk); |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2307 | raw_spin_unlock(&kvm_lock); |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2308 | } |
| 2309 | |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2310 | static void hardware_disable_all_nolock(void) |
| 2311 | { |
| 2312 | BUG_ON(!kvm_usage_count); |
| 2313 | |
| 2314 | kvm_usage_count--; |
| 2315 | if (!kvm_usage_count) |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2316 | on_each_cpu(hardware_disable_nolock, NULL, 1); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2317 | } |
| 2318 | |
| 2319 | static void hardware_disable_all(void) |
| 2320 | { |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2321 | raw_spin_lock(&kvm_lock); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2322 | hardware_disable_all_nolock(); |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2323 | raw_spin_unlock(&kvm_lock); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2324 | } |
| 2325 | |
| 2326 | static int hardware_enable_all(void) |
| 2327 | { |
| 2328 | int r = 0; |
| 2329 | |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2330 | raw_spin_lock(&kvm_lock); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2331 | |
| 2332 | kvm_usage_count++; |
| 2333 | if (kvm_usage_count == 1) { |
| 2334 | atomic_set(&hardware_enable_failed, 0); |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2335 | on_each_cpu(hardware_enable_nolock, NULL, 1); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2336 | |
| 2337 | if (atomic_read(&hardware_enable_failed)) { |
| 2338 | hardware_disable_all_nolock(); |
| 2339 | r = -EBUSY; |
| 2340 | } |
| 2341 | } |
| 2342 | |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2343 | raw_spin_unlock(&kvm_lock); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2344 | |
| 2345 | return r; |
| 2346 | } |
| 2347 | |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 2348 | static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val, |
| 2349 | void *v) |
| 2350 | { |
| 2351 | int cpu = (long)v; |
| 2352 | |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2353 | if (!kvm_usage_count) |
| 2354 | return NOTIFY_OK; |
| 2355 | |
Avi Kivity | 1a6f4d7 | 2007-11-11 18:37:32 +0200 | [diff] [blame] | 2356 | val &= ~CPU_TASKS_FROZEN; |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 2357 | switch (val) { |
Avi Kivity | cec9ad2 | 2007-05-24 13:11:41 +0300 | [diff] [blame] | 2358 | case CPU_DYING: |
Avi Kivity | 6ec8a85 | 2007-08-19 15:57:26 +0300 | [diff] [blame] | 2359 | printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n", |
| 2360 | cpu); |
| 2361 | hardware_disable(NULL); |
| 2362 | break; |
Zachary Amsden | da908f2 | 2010-08-19 22:07:27 -1000 | [diff] [blame] | 2363 | case CPU_STARTING: |
Jeremy Katz | 43934a3 | 2007-02-19 14:37:46 +0200 | [diff] [blame] | 2364 | printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n", |
| 2365 | cpu); |
Zachary Amsden | da908f2 | 2010-08-19 22:07:27 -1000 | [diff] [blame] | 2366 | hardware_enable(NULL); |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 2367 | break; |
| 2368 | } |
| 2369 | return NOTIFY_OK; |
| 2370 | } |
| 2371 | |
Avi Kivity | 4ecac3f | 2008-05-13 13:23:38 +0300 | [diff] [blame] | 2372 | |
Avi Kivity | b7c4145 | 2010-12-02 17:52:50 +0200 | [diff] [blame] | 2373 | asmlinkage void kvm_spurious_fault(void) |
Avi Kivity | 4ecac3f | 2008-05-13 13:23:38 +0300 | [diff] [blame] | 2374 | { |
Avi Kivity | 4ecac3f | 2008-05-13 13:23:38 +0300 | [diff] [blame] | 2375 | /* Fault while not rebooting. We want the trace. */ |
| 2376 | BUG(); |
| 2377 | } |
Avi Kivity | b7c4145 | 2010-12-02 17:52:50 +0200 | [diff] [blame] | 2378 | EXPORT_SYMBOL_GPL(kvm_spurious_fault); |
Avi Kivity | 4ecac3f | 2008-05-13 13:23:38 +0300 | [diff] [blame] | 2379 | |
Rusty Russell | 9a2b85c | 2007-07-17 23:17:55 +1000 | [diff] [blame] | 2380 | static int kvm_reboot(struct notifier_block *notifier, unsigned long val, |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 2381 | void *v) |
Rusty Russell | 9a2b85c | 2007-07-17 23:17:55 +1000 | [diff] [blame] | 2382 | { |
Sheng Yang | 8e1c181 | 2009-04-29 11:09:04 +0800 | [diff] [blame] | 2383 | /* |
| 2384 | * Some (well, at least mine) BIOSes hang on reboot if |
| 2385 | * in vmx root mode. |
| 2386 | * |
| 2387 | * And Intel TXT required VMX off for all cpu when system shutdown. |
| 2388 | */ |
| 2389 | printk(KERN_INFO "kvm: exiting hardware virtualization\n"); |
| 2390 | kvm_rebooting = true; |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2391 | on_each_cpu(hardware_disable_nolock, NULL, 1); |
Rusty Russell | 9a2b85c | 2007-07-17 23:17:55 +1000 | [diff] [blame] | 2392 | return NOTIFY_OK; |
| 2393 | } |
| 2394 | |
| 2395 | static struct notifier_block kvm_reboot_notifier = { |
| 2396 | .notifier_call = kvm_reboot, |
| 2397 | .priority = 0, |
| 2398 | }; |
| 2399 | |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2400 | static void kvm_io_bus_destroy(struct kvm_io_bus *bus) |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 2401 | { |
| 2402 | int i; |
| 2403 | |
| 2404 | for (i = 0; i < bus->dev_count; i++) { |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2405 | struct kvm_io_device *pos = bus->range[i].dev; |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 2406 | |
| 2407 | kvm_iodevice_destructor(pos); |
| 2408 | } |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2409 | kfree(bus); |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 2410 | } |
| 2411 | |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2412 | int kvm_io_bus_sort_cmp(const void *p1, const void *p2) |
| 2413 | { |
| 2414 | const struct kvm_io_range *r1 = p1; |
| 2415 | const struct kvm_io_range *r2 = p2; |
| 2416 | |
| 2417 | if (r1->addr < r2->addr) |
| 2418 | return -1; |
| 2419 | if (r1->addr + r1->len > r2->addr + r2->len) |
| 2420 | return 1; |
| 2421 | return 0; |
| 2422 | } |
| 2423 | |
| 2424 | int kvm_io_bus_insert_dev(struct kvm_io_bus *bus, struct kvm_io_device *dev, |
| 2425 | gpa_t addr, int len) |
| 2426 | { |
| 2427 | if (bus->dev_count == NR_IOBUS_DEVS) |
| 2428 | return -ENOSPC; |
| 2429 | |
| 2430 | bus->range[bus->dev_count++] = (struct kvm_io_range) { |
| 2431 | .addr = addr, |
| 2432 | .len = len, |
| 2433 | .dev = dev, |
| 2434 | }; |
| 2435 | |
| 2436 | sort(bus->range, bus->dev_count, sizeof(struct kvm_io_range), |
| 2437 | kvm_io_bus_sort_cmp, NULL); |
| 2438 | |
| 2439 | return 0; |
| 2440 | } |
| 2441 | |
| 2442 | int kvm_io_bus_get_first_dev(struct kvm_io_bus *bus, |
| 2443 | gpa_t addr, int len) |
| 2444 | { |
| 2445 | struct kvm_io_range *range, key; |
| 2446 | int off; |
| 2447 | |
| 2448 | key = (struct kvm_io_range) { |
| 2449 | .addr = addr, |
| 2450 | .len = len, |
| 2451 | }; |
| 2452 | |
| 2453 | range = bsearch(&key, bus->range, bus->dev_count, |
| 2454 | sizeof(struct kvm_io_range), kvm_io_bus_sort_cmp); |
| 2455 | if (range == NULL) |
| 2456 | return -ENOENT; |
| 2457 | |
| 2458 | off = range - bus->range; |
| 2459 | |
| 2460 | while (off > 0 && kvm_io_bus_sort_cmp(&key, &bus->range[off-1]) == 0) |
| 2461 | off--; |
| 2462 | |
| 2463 | return off; |
| 2464 | } |
| 2465 | |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 2466 | /* kvm_io_bus_write - called under kvm->slots_lock */ |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2467 | int kvm_io_bus_write(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 2468 | int len, const void *val) |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 2469 | { |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2470 | int idx; |
Lai Jiangshan | 90d83dc | 2010-04-19 17:41:23 +0800 | [diff] [blame] | 2471 | struct kvm_io_bus *bus; |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2472 | struct kvm_io_range range; |
| 2473 | |
| 2474 | range = (struct kvm_io_range) { |
| 2475 | .addr = addr, |
| 2476 | .len = len, |
| 2477 | }; |
Lai Jiangshan | 90d83dc | 2010-04-19 17:41:23 +0800 | [diff] [blame] | 2478 | |
| 2479 | bus = srcu_dereference(kvm->buses[bus_idx], &kvm->srcu); |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2480 | idx = kvm_io_bus_get_first_dev(bus, addr, len); |
| 2481 | if (idx < 0) |
| 2482 | return -EOPNOTSUPP; |
| 2483 | |
| 2484 | while (idx < bus->dev_count && |
| 2485 | kvm_io_bus_sort_cmp(&range, &bus->range[idx]) == 0) { |
| 2486 | if (!kvm_iodevice_write(bus->range[idx].dev, addr, len, val)) |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 2487 | return 0; |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2488 | idx++; |
| 2489 | } |
| 2490 | |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 2491 | return -EOPNOTSUPP; |
| 2492 | } |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 2493 | |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 2494 | /* kvm_io_bus_read - called under kvm->slots_lock */ |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2495 | int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, |
| 2496 | int len, void *val) |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 2497 | { |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2498 | int idx; |
Lai Jiangshan | 90d83dc | 2010-04-19 17:41:23 +0800 | [diff] [blame] | 2499 | struct kvm_io_bus *bus; |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2500 | struct kvm_io_range range; |
| 2501 | |
| 2502 | range = (struct kvm_io_range) { |
| 2503 | .addr = addr, |
| 2504 | .len = len, |
| 2505 | }; |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2506 | |
Lai Jiangshan | 90d83dc | 2010-04-19 17:41:23 +0800 | [diff] [blame] | 2507 | bus = srcu_dereference(kvm->buses[bus_idx], &kvm->srcu); |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2508 | idx = kvm_io_bus_get_first_dev(bus, addr, len); |
| 2509 | if (idx < 0) |
| 2510 | return -EOPNOTSUPP; |
| 2511 | |
| 2512 | while (idx < bus->dev_count && |
| 2513 | kvm_io_bus_sort_cmp(&range, &bus->range[idx]) == 0) { |
| 2514 | if (!kvm_iodevice_read(bus->range[idx].dev, addr, len, val)) |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 2515 | return 0; |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2516 | idx++; |
| 2517 | } |
| 2518 | |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 2519 | return -EOPNOTSUPP; |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 2520 | } |
| 2521 | |
Marcelo Tosatti | 79fac95 | 2009-12-23 14:35:26 -0200 | [diff] [blame] | 2522 | /* Caller must hold slots_lock. */ |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2523 | int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, |
| 2524 | int len, struct kvm_io_device *dev) |
Michael S. Tsirkin | 6c47469 | 2009-06-29 22:24:26 +0300 | [diff] [blame] | 2525 | { |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2526 | struct kvm_io_bus *new_bus, *bus; |
Gregory Haskins | 090b7af | 2009-07-07 17:08:44 -0400 | [diff] [blame] | 2527 | |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2528 | bus = kvm->buses[bus_idx]; |
Gregory Haskins | 090b7af | 2009-07-07 17:08:44 -0400 | [diff] [blame] | 2529 | if (bus->dev_count > NR_IOBUS_DEVS-1) |
| 2530 | return -ENOSPC; |
| 2531 | |
Thomas Meyer | 6da64fd | 2011-11-08 20:32:19 +0100 | [diff] [blame] | 2532 | new_bus = kmemdup(bus, sizeof(struct kvm_io_bus), GFP_KERNEL); |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2533 | if (!new_bus) |
| 2534 | return -ENOMEM; |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2535 | kvm_io_bus_insert_dev(new_bus, dev, addr, len); |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2536 | rcu_assign_pointer(kvm->buses[bus_idx], new_bus); |
| 2537 | synchronize_srcu_expedited(&kvm->srcu); |
| 2538 | kfree(bus); |
Gregory Haskins | 090b7af | 2009-07-07 17:08:44 -0400 | [diff] [blame] | 2539 | |
| 2540 | return 0; |
| 2541 | } |
| 2542 | |
Marcelo Tosatti | 79fac95 | 2009-12-23 14:35:26 -0200 | [diff] [blame] | 2543 | /* Caller must hold slots_lock. */ |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2544 | int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx, |
| 2545 | struct kvm_io_device *dev) |
Gregory Haskins | 090b7af | 2009-07-07 17:08:44 -0400 | [diff] [blame] | 2546 | { |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2547 | int i, r; |
| 2548 | struct kvm_io_bus *new_bus, *bus; |
Michael S. Tsirkin | 6c47469 | 2009-06-29 22:24:26 +0300 | [diff] [blame] | 2549 | |
Sasha Levin | cdfca7b | 2011-12-04 19:36:28 +0200 | [diff] [blame] | 2550 | bus = kvm->buses[bus_idx]; |
| 2551 | |
| 2552 | new_bus = kmemdup(bus, sizeof(*bus), GFP_KERNEL); |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2553 | if (!new_bus) |
| 2554 | return -ENOMEM; |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 2555 | |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2556 | r = -ENOENT; |
| 2557 | for (i = 0; i < new_bus->dev_count; i++) |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2558 | if (new_bus->range[i].dev == dev) { |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2559 | r = 0; |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2560 | new_bus->dev_count--; |
| 2561 | new_bus->range[i] = new_bus->range[new_bus->dev_count]; |
| 2562 | sort(new_bus->range, new_bus->dev_count, |
| 2563 | sizeof(struct kvm_io_range), |
| 2564 | kvm_io_bus_sort_cmp, NULL); |
Gregory Haskins | 090b7af | 2009-07-07 17:08:44 -0400 | [diff] [blame] | 2565 | break; |
| 2566 | } |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2567 | |
| 2568 | if (r) { |
| 2569 | kfree(new_bus); |
| 2570 | return r; |
| 2571 | } |
| 2572 | |
| 2573 | rcu_assign_pointer(kvm->buses[bus_idx], new_bus); |
| 2574 | synchronize_srcu_expedited(&kvm->srcu); |
| 2575 | kfree(bus); |
| 2576 | return r; |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 2577 | } |
| 2578 | |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 2579 | static struct notifier_block kvm_cpu_notifier = { |
| 2580 | .notifier_call = kvm_cpu_hotplug, |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 2581 | }; |
| 2582 | |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 2583 | static int vm_stat_get(void *_offset, u64 *val) |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 2584 | { |
| 2585 | unsigned offset = (long)_offset; |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 2586 | struct kvm *kvm; |
| 2587 | |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 2588 | *val = 0; |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2589 | raw_spin_lock(&kvm_lock); |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 2590 | list_for_each_entry(kvm, &vm_list, vm_list) |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 2591 | *val += *(u32 *)((void *)kvm + offset); |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2592 | raw_spin_unlock(&kvm_lock); |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 2593 | return 0; |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 2594 | } |
| 2595 | |
| 2596 | DEFINE_SIMPLE_ATTRIBUTE(vm_stat_fops, vm_stat_get, NULL, "%llu\n"); |
| 2597 | |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 2598 | static int vcpu_stat_get(void *_offset, u64 *val) |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 2599 | { |
| 2600 | unsigned offset = (long)_offset; |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 2601 | struct kvm *kvm; |
| 2602 | struct kvm_vcpu *vcpu; |
| 2603 | int i; |
| 2604 | |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 2605 | *val = 0; |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2606 | raw_spin_lock(&kvm_lock); |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 2607 | list_for_each_entry(kvm, &vm_list, vm_list) |
Gleb Natapov | 988a2ca | 2009-06-09 15:56:29 +0300 | [diff] [blame] | 2608 | kvm_for_each_vcpu(i, vcpu, kvm) |
| 2609 | *val += *(u32 *)((void *)vcpu + offset); |
| 2610 | |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2611 | raw_spin_unlock(&kvm_lock); |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 2612 | return 0; |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 2613 | } |
| 2614 | |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 2615 | DEFINE_SIMPLE_ATTRIBUTE(vcpu_stat_fops, vcpu_stat_get, NULL, "%llu\n"); |
| 2616 | |
Alexey Dobriyan | 828c095 | 2009-10-01 15:43:56 -0700 | [diff] [blame] | 2617 | static const struct file_operations *stat_fops[] = { |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 2618 | [KVM_STAT_VCPU] = &vcpu_stat_fops, |
| 2619 | [KVM_STAT_VM] = &vm_stat_fops, |
| 2620 | }; |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 2621 | |
Hamo | 4f69b68 | 2011-12-15 14:23:16 +0800 | [diff] [blame] | 2622 | static int kvm_init_debug(void) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2623 | { |
Hamo | 4f69b68 | 2011-12-15 14:23:16 +0800 | [diff] [blame] | 2624 | int r = -EFAULT; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2625 | struct kvm_stats_debugfs_item *p; |
| 2626 | |
Hollis Blanchard | 76f7c87 | 2008-04-15 16:05:42 -0500 | [diff] [blame] | 2627 | kvm_debugfs_dir = debugfs_create_dir("kvm", NULL); |
Hamo | 4f69b68 | 2011-12-15 14:23:16 +0800 | [diff] [blame] | 2628 | if (kvm_debugfs_dir == NULL) |
| 2629 | goto out; |
| 2630 | |
| 2631 | for (p = debugfs_entries; p->name; ++p) { |
Hollis Blanchard | 76f7c87 | 2008-04-15 16:05:42 -0500 | [diff] [blame] | 2632 | p->dentry = debugfs_create_file(p->name, 0444, kvm_debugfs_dir, |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 2633 | (void *)(long)p->offset, |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 2634 | stat_fops[p->kind]); |
Hamo | 4f69b68 | 2011-12-15 14:23:16 +0800 | [diff] [blame] | 2635 | if (p->dentry == NULL) |
| 2636 | goto out_dir; |
| 2637 | } |
| 2638 | |
| 2639 | return 0; |
| 2640 | |
| 2641 | out_dir: |
| 2642 | debugfs_remove_recursive(kvm_debugfs_dir); |
| 2643 | out: |
| 2644 | return r; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2645 | } |
| 2646 | |
| 2647 | static void kvm_exit_debug(void) |
| 2648 | { |
| 2649 | struct kvm_stats_debugfs_item *p; |
| 2650 | |
| 2651 | for (p = debugfs_entries; p->name; ++p) |
| 2652 | debugfs_remove(p->dentry); |
Hollis Blanchard | 76f7c87 | 2008-04-15 16:05:42 -0500 | [diff] [blame] | 2653 | debugfs_remove(kvm_debugfs_dir); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2654 | } |
| 2655 | |
Rafael J. Wysocki | fb3600c | 2011-03-23 22:16:23 +0100 | [diff] [blame] | 2656 | static int kvm_suspend(void) |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 2657 | { |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2658 | if (kvm_usage_count) |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2659 | hardware_disable_nolock(NULL); |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 2660 | return 0; |
| 2661 | } |
| 2662 | |
Rafael J. Wysocki | fb3600c | 2011-03-23 22:16:23 +0100 | [diff] [blame] | 2663 | static void kvm_resume(void) |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 2664 | { |
Zachary Amsden | ca84d1a | 2010-08-19 22:07:28 -1000 | [diff] [blame] | 2665 | if (kvm_usage_count) { |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2666 | WARN_ON(raw_spin_is_locked(&kvm_lock)); |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2667 | hardware_enable_nolock(NULL); |
Zachary Amsden | ca84d1a | 2010-08-19 22:07:28 -1000 | [diff] [blame] | 2668 | } |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 2669 | } |
| 2670 | |
Rafael J. Wysocki | fb3600c | 2011-03-23 22:16:23 +0100 | [diff] [blame] | 2671 | static struct syscore_ops kvm_syscore_ops = { |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 2672 | .suspend = kvm_suspend, |
| 2673 | .resume = kvm_resume, |
| 2674 | }; |
| 2675 | |
Izik Eidus | cea7bb2 | 2007-10-17 19:17:48 +0200 | [diff] [blame] | 2676 | struct page *bad_page; |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 2677 | pfn_t bad_pfn; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2678 | |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 2679 | static inline |
| 2680 | struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn) |
| 2681 | { |
| 2682 | return container_of(pn, struct kvm_vcpu, preempt_notifier); |
| 2683 | } |
| 2684 | |
| 2685 | static void kvm_sched_in(struct preempt_notifier *pn, int cpu) |
| 2686 | { |
| 2687 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); |
| 2688 | |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 2689 | kvm_arch_vcpu_load(vcpu, cpu); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 2690 | } |
| 2691 | |
| 2692 | static void kvm_sched_out(struct preempt_notifier *pn, |
| 2693 | struct task_struct *next) |
| 2694 | { |
| 2695 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); |
| 2696 | |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 2697 | kvm_arch_vcpu_put(vcpu); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 2698 | } |
| 2699 | |
Avi Kivity | 0ee75be | 2010-04-28 15:39:01 +0300 | [diff] [blame] | 2700 | int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align, |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 2701 | struct module *module) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2702 | { |
| 2703 | int r; |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 2704 | int cpu; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2705 | |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 2706 | r = kvm_arch_init(opaque); |
| 2707 | if (r) |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2708 | goto out_fail; |
Zhang Xiantao | cb498ea | 2007-11-14 20:39:31 +0800 | [diff] [blame] | 2709 | |
| 2710 | bad_page = alloc_page(GFP_KERNEL | __GFP_ZERO); |
| 2711 | |
| 2712 | if (bad_page == NULL) { |
| 2713 | r = -ENOMEM; |
| 2714 | goto out; |
| 2715 | } |
| 2716 | |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 2717 | bad_pfn = page_to_pfn(bad_page); |
| 2718 | |
Huang Ying | bf99815 | 2010-05-31 14:28:19 +0800 | [diff] [blame] | 2719 | hwpoison_page = alloc_page(GFP_KERNEL | __GFP_ZERO); |
| 2720 | |
| 2721 | if (hwpoison_page == NULL) { |
| 2722 | r = -ENOMEM; |
| 2723 | goto out_free_0; |
| 2724 | } |
| 2725 | |
| 2726 | hwpoison_pfn = page_to_pfn(hwpoison_page); |
| 2727 | |
Gleb Natapov | edba23e | 2010-07-07 20:16:45 +0300 | [diff] [blame] | 2728 | fault_page = alloc_page(GFP_KERNEL | __GFP_ZERO); |
| 2729 | |
| 2730 | if (fault_page == NULL) { |
| 2731 | r = -ENOMEM; |
| 2732 | goto out_free_0; |
| 2733 | } |
| 2734 | |
| 2735 | fault_pfn = page_to_pfn(fault_page); |
| 2736 | |
Avi Kivity | 8437a61 | 2009-06-06 14:52:35 -0700 | [diff] [blame] | 2737 | if (!zalloc_cpumask_var(&cpus_hardware_enabled, GFP_KERNEL)) { |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 2738 | r = -ENOMEM; |
| 2739 | goto out_free_0; |
| 2740 | } |
| 2741 | |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 2742 | r = kvm_arch_hardware_setup(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2743 | if (r < 0) |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 2744 | goto out_free_0a; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2745 | |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 2746 | for_each_online_cpu(cpu) { |
| 2747 | smp_call_function_single(cpu, |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 2748 | kvm_arch_check_processor_compat, |
Jens Axboe | 8691e5a | 2008-06-06 11:18:06 +0200 | [diff] [blame] | 2749 | &r, 1); |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 2750 | if (r < 0) |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2751 | goto out_free_1; |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 2752 | } |
| 2753 | |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 2754 | r = register_cpu_notifier(&kvm_cpu_notifier); |
| 2755 | if (r) |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2756 | goto out_free_2; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2757 | register_reboot_notifier(&kvm_reboot_notifier); |
| 2758 | |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 2759 | /* A kmem cache lets us meet the alignment requirements of fx_save. */ |
Avi Kivity | 0ee75be | 2010-04-28 15:39:01 +0300 | [diff] [blame] | 2760 | if (!vcpu_align) |
| 2761 | vcpu_align = __alignof__(struct kvm_vcpu); |
| 2762 | kvm_vcpu_cache = kmem_cache_create("kvm_vcpu", vcpu_size, vcpu_align, |
Joe Perches | 56919c5 | 2007-11-12 20:06:51 -0800 | [diff] [blame] | 2763 | 0, NULL); |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 2764 | if (!kvm_vcpu_cache) { |
| 2765 | r = -ENOMEM; |
Rafael J. Wysocki | fb3600c | 2011-03-23 22:16:23 +0100 | [diff] [blame] | 2766 | goto out_free_3; |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 2767 | } |
| 2768 | |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 2769 | r = kvm_async_pf_init(); |
| 2770 | if (r) |
| 2771 | goto out_free; |
| 2772 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2773 | kvm_chardev_ops.owner = module; |
Christian Borntraeger | 3d3aab1 | 2008-12-02 11:17:32 +0100 | [diff] [blame] | 2774 | kvm_vm_fops.owner = module; |
| 2775 | kvm_vcpu_fops.owner = module; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2776 | |
| 2777 | r = misc_register(&kvm_dev); |
| 2778 | if (r) { |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 2779 | printk(KERN_ERR "kvm: misc device register failed\n"); |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 2780 | goto out_unreg; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2781 | } |
| 2782 | |
Rafael J. Wysocki | fb3600c | 2011-03-23 22:16:23 +0100 | [diff] [blame] | 2783 | register_syscore_ops(&kvm_syscore_ops); |
| 2784 | |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 2785 | kvm_preempt_ops.sched_in = kvm_sched_in; |
| 2786 | kvm_preempt_ops.sched_out = kvm_sched_out; |
| 2787 | |
Hamo | 4f69b68 | 2011-12-15 14:23:16 +0800 | [diff] [blame] | 2788 | r = kvm_init_debug(); |
| 2789 | if (r) { |
| 2790 | printk(KERN_ERR "kvm: create debugfs files failed\n"); |
| 2791 | goto out_undebugfs; |
| 2792 | } |
Darrick J. Wong | 0ea4ed8 | 2009-10-14 16:21:00 -0700 | [diff] [blame] | 2793 | |
Avi Kivity | c7addb9 | 2007-09-16 18:58:32 +0200 | [diff] [blame] | 2794 | return 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2795 | |
Hamo | 4f69b68 | 2011-12-15 14:23:16 +0800 | [diff] [blame] | 2796 | out_undebugfs: |
| 2797 | unregister_syscore_ops(&kvm_syscore_ops); |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 2798 | out_unreg: |
| 2799 | kvm_async_pf_deinit(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2800 | out_free: |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 2801 | kmem_cache_destroy(kvm_vcpu_cache); |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2802 | out_free_3: |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2803 | unregister_reboot_notifier(&kvm_reboot_notifier); |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 2804 | unregister_cpu_notifier(&kvm_cpu_notifier); |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2805 | out_free_2: |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2806 | out_free_1: |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 2807 | kvm_arch_hardware_unsetup(); |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 2808 | out_free_0a: |
| 2809 | free_cpumask_var(cpus_hardware_enabled); |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2810 | out_free_0: |
Gleb Natapov | edba23e | 2010-07-07 20:16:45 +0300 | [diff] [blame] | 2811 | if (fault_page) |
| 2812 | __free_page(fault_page); |
Huang Ying | bf99815 | 2010-05-31 14:28:19 +0800 | [diff] [blame] | 2813 | if (hwpoison_page) |
| 2814 | __free_page(hwpoison_page); |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2815 | __free_page(bad_page); |
Avi Kivity | ca45aaa | 2007-03-01 19:21:03 +0200 | [diff] [blame] | 2816 | out: |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 2817 | kvm_arch_exit(); |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2818 | out_fail: |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2819 | return r; |
| 2820 | } |
Zhang Xiantao | cb498ea | 2007-11-14 20:39:31 +0800 | [diff] [blame] | 2821 | EXPORT_SYMBOL_GPL(kvm_init); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2822 | |
Zhang Xiantao | cb498ea | 2007-11-14 20:39:31 +0800 | [diff] [blame] | 2823 | void kvm_exit(void) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2824 | { |
Darrick J. Wong | 0ea4ed8 | 2009-10-14 16:21:00 -0700 | [diff] [blame] | 2825 | kvm_exit_debug(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2826 | misc_deregister(&kvm_dev); |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 2827 | kmem_cache_destroy(kvm_vcpu_cache); |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 2828 | kvm_async_pf_deinit(); |
Rafael J. Wysocki | fb3600c | 2011-03-23 22:16:23 +0100 | [diff] [blame] | 2829 | unregister_syscore_ops(&kvm_syscore_ops); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2830 | unregister_reboot_notifier(&kvm_reboot_notifier); |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 2831 | unregister_cpu_notifier(&kvm_cpu_notifier); |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2832 | on_each_cpu(hardware_disable_nolock, NULL, 1); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 2833 | kvm_arch_hardware_unsetup(); |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 2834 | kvm_arch_exit(); |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 2835 | free_cpumask_var(cpus_hardware_enabled); |
Huang Ying | bf99815 | 2010-05-31 14:28:19 +0800 | [diff] [blame] | 2836 | __free_page(hwpoison_page); |
Izik Eidus | cea7bb2 | 2007-10-17 19:17:48 +0200 | [diff] [blame] | 2837 | __free_page(bad_page); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2838 | } |
Zhang Xiantao | cb498ea | 2007-11-14 20:39:31 +0800 | [diff] [blame] | 2839 | EXPORT_SYMBOL_GPL(kvm_exit); |