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 | |
Xiao Guangrong | a276632 | 2012-07-26 11:58:59 +0800 | [diff] [blame] | 103 | bool kvm_is_mmio_pfn(pfn_t pfn) |
Ben-Ami Yassour | cbff90a | 2008-07-28 19:26:24 +0300 | [diff] [blame] | 104 | { |
Joerg Roedel | fc5659c | 2009-02-18 14:08:58 +0100 | [diff] [blame] | 105 | if (pfn_valid(pfn)) { |
Andrea Arcangeli | 22e5c47 | 2011-01-13 15:47:20 -0800 | [diff] [blame] | 106 | int reserved; |
Andrea Arcangeli | 936a5fe | 2011-01-13 15:46:48 -0800 | [diff] [blame] | 107 | struct page *tail = pfn_to_page(pfn); |
Andrea Arcangeli | 22e5c47 | 2011-01-13 15:47:20 -0800 | [diff] [blame] | 108 | struct page *head = compound_trans_head(tail); |
| 109 | reserved = PageReserved(head); |
Andrea Arcangeli | 936a5fe | 2011-01-13 15:46:48 -0800 | [diff] [blame] | 110 | if (head != tail) { |
Andrea Arcangeli | 936a5fe | 2011-01-13 15:46:48 -0800 | [diff] [blame] | 111 | /* |
Andrea Arcangeli | 22e5c47 | 2011-01-13 15:47:20 -0800 | [diff] [blame] | 112 | * "head" is not a dangling pointer |
| 113 | * (compound_trans_head takes care of that) |
| 114 | * but the hugepage may have been splitted |
| 115 | * from under us (and we may not hold a |
| 116 | * reference count on the head page so it can |
| 117 | * be reused before we run PageReferenced), so |
| 118 | * we've to check PageTail before returning |
| 119 | * what we just read. |
Andrea Arcangeli | 936a5fe | 2011-01-13 15:46:48 -0800 | [diff] [blame] | 120 | */ |
Andrea Arcangeli | 22e5c47 | 2011-01-13 15:47:20 -0800 | [diff] [blame] | 121 | smp_rmb(); |
| 122 | if (PageTail(tail)) |
| 123 | return reserved; |
Andrea Arcangeli | 936a5fe | 2011-01-13 15:46:48 -0800 | [diff] [blame] | 124 | } |
| 125 | return PageReserved(tail); |
Joerg Roedel | fc5659c | 2009-02-18 14:08:58 +0100 | [diff] [blame] | 126 | } |
Ben-Ami Yassour | cbff90a | 2008-07-28 19:26:24 +0300 | [diff] [blame] | 127 | |
| 128 | return true; |
| 129 | } |
| 130 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 131 | /* |
| 132 | * Switches to specified vcpu, until a matching vcpu_put() |
| 133 | */ |
Michael S. Tsirkin | 9fc7744 | 2012-09-16 11:50:30 +0300 | [diff] [blame] | 134 | int vcpu_load(struct kvm_vcpu *vcpu) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 135 | { |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 136 | int cpu; |
| 137 | |
Michael S. Tsirkin | 9fc7744 | 2012-09-16 11:50:30 +0300 | [diff] [blame] | 138 | if (mutex_lock_killable(&vcpu->mutex)) |
| 139 | return -EINTR; |
Rik van Riel | 34bb10b | 2011-02-01 09:52:41 -0500 | [diff] [blame] | 140 | if (unlikely(vcpu->pid != current->pids[PIDTYPE_PID].pid)) { |
| 141 | /* The thread running this VCPU changed. */ |
| 142 | struct pid *oldpid = vcpu->pid; |
| 143 | struct pid *newpid = get_task_pid(current, PIDTYPE_PID); |
| 144 | rcu_assign_pointer(vcpu->pid, newpid); |
| 145 | synchronize_rcu(); |
| 146 | put_pid(oldpid); |
| 147 | } |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 148 | cpu = get_cpu(); |
| 149 | preempt_notifier_register(&vcpu->preempt_notifier); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 150 | kvm_arch_vcpu_load(vcpu, cpu); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 151 | put_cpu(); |
Michael S. Tsirkin | 9fc7744 | 2012-09-16 11:50:30 +0300 | [diff] [blame] | 152 | return 0; |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 153 | } |
| 154 | |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 155 | void vcpu_put(struct kvm_vcpu *vcpu) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 156 | { |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 157 | preempt_disable(); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 158 | kvm_arch_vcpu_put(vcpu); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 159 | preempt_notifier_unregister(&vcpu->preempt_notifier); |
| 160 | preempt_enable(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 161 | mutex_unlock(&vcpu->mutex); |
| 162 | } |
| 163 | |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 164 | static void ack_flush(void *_completed) |
| 165 | { |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 166 | } |
| 167 | |
Rusty Russell | 4984689 | 2008-12-08 20:26:24 +1030 | [diff] [blame] | 168 | static bool make_all_cpus_request(struct kvm *kvm, unsigned int req) |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 169 | { |
Avi Kivity | 597a5f5 | 2008-07-20 14:24:22 +0300 | [diff] [blame] | 170 | int i, cpu, me; |
Rusty Russell | 6ef7a1b | 2008-12-08 20:28:04 +1030 | [diff] [blame] | 171 | cpumask_var_t cpus; |
| 172 | bool called = true; |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 173 | struct kvm_vcpu *vcpu; |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 174 | |
Li Zefan | 79f5599 | 2009-06-15 14:58:26 +0800 | [diff] [blame] | 175 | zalloc_cpumask_var(&cpus, GFP_ATOMIC); |
Rusty Russell | 6ef7a1b | 2008-12-08 20:28:04 +1030 | [diff] [blame] | 176 | |
Xiao Guangrong | 3cba413 | 2011-01-12 15:41:22 +0800 | [diff] [blame] | 177 | me = get_cpu(); |
Gleb Natapov | 988a2ca | 2009-06-09 15:56:29 +0300 | [diff] [blame] | 178 | kvm_for_each_vcpu(i, vcpu, kvm) { |
Xiao Guangrong | 3cba413 | 2011-01-12 15:41:22 +0800 | [diff] [blame] | 179 | kvm_make_request(req, vcpu); |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 180 | cpu = vcpu->cpu; |
Xiao Guangrong | 6b7e2d0 | 2011-01-12 15:40:31 +0800 | [diff] [blame] | 181 | |
| 182 | /* Set ->requests bit before we read ->mode */ |
| 183 | smp_mb(); |
| 184 | |
| 185 | if (cpus != NULL && cpu != -1 && cpu != me && |
| 186 | kvm_vcpu_exiting_guest_mode(vcpu) != OUTSIDE_GUEST_MODE) |
Rusty Russell | 6ef7a1b | 2008-12-08 20:28:04 +1030 | [diff] [blame] | 187 | cpumask_set_cpu(cpu, cpus); |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 188 | } |
Rusty Russell | 6ef7a1b | 2008-12-08 20:28:04 +1030 | [diff] [blame] | 189 | if (unlikely(cpus == NULL)) |
| 190 | smp_call_function_many(cpu_online_mask, ack_flush, NULL, 1); |
| 191 | else if (!cpumask_empty(cpus)) |
| 192 | smp_call_function_many(cpus, ack_flush, NULL, 1); |
| 193 | else |
| 194 | called = false; |
Xiao Guangrong | 3cba413 | 2011-01-12 15:41:22 +0800 | [diff] [blame] | 195 | put_cpu(); |
Rusty Russell | 6ef7a1b | 2008-12-08 20:28:04 +1030 | [diff] [blame] | 196 | free_cpumask_var(cpus); |
Rusty Russell | 4984689 | 2008-12-08 20:26:24 +1030 | [diff] [blame] | 197 | return called; |
| 198 | } |
| 199 | |
| 200 | void kvm_flush_remote_tlbs(struct kvm *kvm) |
| 201 | { |
Alex Shi | bec87d6 | 2012-03-04 13:13:38 +0800 | [diff] [blame] | 202 | long dirty_count = kvm->tlbs_dirty; |
Xiao Guangrong | a4ee1ca | 2010-11-23 11:13:00 +0800 | [diff] [blame] | 203 | |
| 204 | smp_mb(); |
Rusty Russell | 4984689 | 2008-12-08 20:26:24 +1030 | [diff] [blame] | 205 | if (make_all_cpus_request(kvm, KVM_REQ_TLB_FLUSH)) |
| 206 | ++kvm->stat.remote_tlb_flush; |
Xiao Guangrong | a4ee1ca | 2010-11-23 11:13:00 +0800 | [diff] [blame] | 207 | cmpxchg(&kvm->tlbs_dirty, dirty_count, 0); |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 208 | } |
| 209 | |
Marcelo Tosatti | 2e53d63 | 2008-02-20 14:47:24 -0500 | [diff] [blame] | 210 | void kvm_reload_remote_mmus(struct kvm *kvm) |
| 211 | { |
Rusty Russell | 4984689 | 2008-12-08 20:26:24 +1030 | [diff] [blame] | 212 | make_all_cpus_request(kvm, KVM_REQ_MMU_RELOAD); |
Marcelo Tosatti | 2e53d63 | 2008-02-20 14:47:24 -0500 | [diff] [blame] | 213 | } |
| 214 | |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 215 | int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id) |
| 216 | { |
| 217 | struct page *page; |
| 218 | int r; |
| 219 | |
| 220 | mutex_init(&vcpu->mutex); |
| 221 | vcpu->cpu = -1; |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 222 | vcpu->kvm = kvm; |
| 223 | vcpu->vcpu_id = id; |
Rik van Riel | 34bb10b | 2011-02-01 09:52:41 -0500 | [diff] [blame] | 224 | vcpu->pid = NULL; |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 225 | init_waitqueue_head(&vcpu->wq); |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 226 | kvm_async_pf_vcpu_init(vcpu); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 227 | |
| 228 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); |
| 229 | if (!page) { |
| 230 | r = -ENOMEM; |
| 231 | goto fail; |
| 232 | } |
| 233 | vcpu->run = page_address(page); |
| 234 | |
Raghavendra K T | 4c08849 | 2012-07-18 19:07:46 +0530 | [diff] [blame] | 235 | kvm_vcpu_set_in_spin_loop(vcpu, false); |
| 236 | kvm_vcpu_set_dy_eligible(vcpu, false); |
| 237 | |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 238 | r = kvm_arch_vcpu_init(vcpu); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 239 | if (r < 0) |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 240 | goto fail_free_run; |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 241 | return 0; |
| 242 | |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 243 | fail_free_run: |
| 244 | free_page((unsigned long)vcpu->run); |
| 245 | fail: |
Rusty Russell | 76fafa5 | 2007-10-08 10:50:48 +1000 | [diff] [blame] | 246 | return r; |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 247 | } |
| 248 | EXPORT_SYMBOL_GPL(kvm_vcpu_init); |
| 249 | |
| 250 | void kvm_vcpu_uninit(struct kvm_vcpu *vcpu) |
| 251 | { |
Rik van Riel | 34bb10b | 2011-02-01 09:52:41 -0500 | [diff] [blame] | 252 | put_pid(vcpu->pid); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 253 | kvm_arch_vcpu_uninit(vcpu); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 254 | free_page((unsigned long)vcpu->run); |
| 255 | } |
| 256 | EXPORT_SYMBOL_GPL(kvm_vcpu_uninit); |
| 257 | |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 258 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) |
| 259 | static inline struct kvm *mmu_notifier_to_kvm(struct mmu_notifier *mn) |
| 260 | { |
| 261 | return container_of(mn, struct kvm, mmu_notifier); |
| 262 | } |
| 263 | |
| 264 | static void kvm_mmu_notifier_invalidate_page(struct mmu_notifier *mn, |
| 265 | struct mm_struct *mm, |
| 266 | unsigned long address) |
| 267 | { |
| 268 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 269 | int need_tlb_flush, idx; |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 270 | |
| 271 | /* |
| 272 | * When ->invalidate_page runs, the linux pte has been zapped |
| 273 | * already but the page is still allocated until |
| 274 | * ->invalidate_page returns. So if we increase the sequence |
| 275 | * here the kvm page fault will notice if the spte can't be |
| 276 | * established because the page is going to be freed. If |
| 277 | * instead the kvm page fault establishes the spte before |
| 278 | * ->invalidate_page runs, kvm_unmap_hva will release it |
| 279 | * before returning. |
| 280 | * |
| 281 | * The sequence increase only need to be seen at spin_unlock |
| 282 | * time, and not at spin_lock time. |
| 283 | * |
| 284 | * Increasing the sequence after the spin_unlock would be |
| 285 | * unsafe because the kvm page fault could then establish the |
| 286 | * pte after kvm_unmap_hva returned, without noticing the page |
| 287 | * is going to be freed. |
| 288 | */ |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 289 | idx = srcu_read_lock(&kvm->srcu); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 290 | spin_lock(&kvm->mmu_lock); |
Takuya Yoshikawa | 565f3be | 2012-02-10 15:28:31 +0900 | [diff] [blame] | 291 | |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 292 | kvm->mmu_notifier_seq++; |
Xiao Guangrong | a4ee1ca | 2010-11-23 11:13:00 +0800 | [diff] [blame] | 293 | need_tlb_flush = kvm_unmap_hva(kvm, address) | kvm->tlbs_dirty; |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 294 | /* we've to flush the tlb before the pages can be freed */ |
| 295 | if (need_tlb_flush) |
| 296 | kvm_flush_remote_tlbs(kvm); |
| 297 | |
Takuya Yoshikawa | 565f3be | 2012-02-10 15:28:31 +0900 | [diff] [blame] | 298 | spin_unlock(&kvm->mmu_lock); |
| 299 | srcu_read_unlock(&kvm->srcu, idx); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 300 | } |
| 301 | |
Izik Eidus | 3da0dd4 | 2009-09-23 21:47:18 +0300 | [diff] [blame] | 302 | static void kvm_mmu_notifier_change_pte(struct mmu_notifier *mn, |
| 303 | struct mm_struct *mm, |
| 304 | unsigned long address, |
| 305 | pte_t pte) |
| 306 | { |
| 307 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 308 | int idx; |
Izik Eidus | 3da0dd4 | 2009-09-23 21:47:18 +0300 | [diff] [blame] | 309 | |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 310 | idx = srcu_read_lock(&kvm->srcu); |
Izik Eidus | 3da0dd4 | 2009-09-23 21:47:18 +0300 | [diff] [blame] | 311 | spin_lock(&kvm->mmu_lock); |
| 312 | kvm->mmu_notifier_seq++; |
| 313 | kvm_set_spte_hva(kvm, address, pte); |
| 314 | spin_unlock(&kvm->mmu_lock); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 315 | srcu_read_unlock(&kvm->srcu, idx); |
Izik Eidus | 3da0dd4 | 2009-09-23 21:47:18 +0300 | [diff] [blame] | 316 | } |
| 317 | |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 318 | static void kvm_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn, |
| 319 | struct mm_struct *mm, |
| 320 | unsigned long start, |
| 321 | unsigned long end) |
| 322 | { |
| 323 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 324 | int need_tlb_flush = 0, idx; |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 325 | |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 326 | idx = srcu_read_lock(&kvm->srcu); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 327 | spin_lock(&kvm->mmu_lock); |
| 328 | /* |
| 329 | * The count increase must become visible at unlock time as no |
| 330 | * spte can be established without taking the mmu_lock and |
| 331 | * count is also read inside the mmu_lock critical section. |
| 332 | */ |
| 333 | kvm->mmu_notifier_count++; |
Takuya Yoshikawa | b3ae209 | 2012-07-02 17:56:33 +0900 | [diff] [blame] | 334 | need_tlb_flush = kvm_unmap_hva_range(kvm, start, end); |
Xiao Guangrong | a4ee1ca | 2010-11-23 11:13:00 +0800 | [diff] [blame] | 335 | need_tlb_flush |= kvm->tlbs_dirty; |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 336 | /* we've to flush the tlb before the pages can be freed */ |
| 337 | if (need_tlb_flush) |
| 338 | kvm_flush_remote_tlbs(kvm); |
Takuya Yoshikawa | 565f3be | 2012-02-10 15:28:31 +0900 | [diff] [blame] | 339 | |
| 340 | spin_unlock(&kvm->mmu_lock); |
| 341 | srcu_read_unlock(&kvm->srcu, idx); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 342 | } |
| 343 | |
| 344 | static void kvm_mmu_notifier_invalidate_range_end(struct mmu_notifier *mn, |
| 345 | struct mm_struct *mm, |
| 346 | unsigned long start, |
| 347 | unsigned long end) |
| 348 | { |
| 349 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
| 350 | |
| 351 | spin_lock(&kvm->mmu_lock); |
| 352 | /* |
| 353 | * This sequence increase will notify the kvm page fault that |
| 354 | * the page that is going to be mapped in the spte could have |
| 355 | * been freed. |
| 356 | */ |
| 357 | kvm->mmu_notifier_seq++; |
Paul Mackerras | a355aa5 | 2011-12-12 12:37:21 +0000 | [diff] [blame] | 358 | smp_wmb(); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 359 | /* |
| 360 | * The above sequence increase must be visible before the |
Paul Mackerras | a355aa5 | 2011-12-12 12:37:21 +0000 | [diff] [blame] | 361 | * below count decrease, which is ensured by the smp_wmb above |
| 362 | * in conjunction with the smp_rmb in mmu_notifier_retry(). |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 363 | */ |
| 364 | kvm->mmu_notifier_count--; |
| 365 | spin_unlock(&kvm->mmu_lock); |
| 366 | |
| 367 | BUG_ON(kvm->mmu_notifier_count < 0); |
| 368 | } |
| 369 | |
| 370 | static int kvm_mmu_notifier_clear_flush_young(struct mmu_notifier *mn, |
| 371 | struct mm_struct *mm, |
| 372 | unsigned long address) |
| 373 | { |
| 374 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 375 | int young, idx; |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 376 | |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 377 | idx = srcu_read_lock(&kvm->srcu); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 378 | spin_lock(&kvm->mmu_lock); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 379 | |
Takuya Yoshikawa | 565f3be | 2012-02-10 15:28:31 +0900 | [diff] [blame] | 380 | young = kvm_age_hva(kvm, address); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 381 | if (young) |
| 382 | kvm_flush_remote_tlbs(kvm); |
| 383 | |
Takuya Yoshikawa | 565f3be | 2012-02-10 15:28:31 +0900 | [diff] [blame] | 384 | spin_unlock(&kvm->mmu_lock); |
| 385 | srcu_read_unlock(&kvm->srcu, idx); |
| 386 | |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 387 | return young; |
| 388 | } |
| 389 | |
Andrea Arcangeli | 8ee5382 | 2011-01-13 15:47:10 -0800 | [diff] [blame] | 390 | static int kvm_mmu_notifier_test_young(struct mmu_notifier *mn, |
| 391 | struct mm_struct *mm, |
| 392 | unsigned long address) |
| 393 | { |
| 394 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
| 395 | int young, idx; |
| 396 | |
| 397 | idx = srcu_read_lock(&kvm->srcu); |
| 398 | spin_lock(&kvm->mmu_lock); |
| 399 | young = kvm_test_age_hva(kvm, address); |
| 400 | spin_unlock(&kvm->mmu_lock); |
| 401 | srcu_read_unlock(&kvm->srcu, idx); |
| 402 | |
| 403 | return young; |
| 404 | } |
| 405 | |
Marcelo Tosatti | 85db06e | 2008-12-10 21:23:26 +0100 | [diff] [blame] | 406 | static void kvm_mmu_notifier_release(struct mmu_notifier *mn, |
| 407 | struct mm_struct *mm) |
| 408 | { |
| 409 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
Lai Jiangshan | eda2bed | 2010-04-20 14:29:29 +0800 | [diff] [blame] | 410 | int idx; |
| 411 | |
| 412 | idx = srcu_read_lock(&kvm->srcu); |
Marcelo Tosatti | 2df72e9 | 2012-08-24 15:54:57 -0300 | [diff] [blame] | 413 | kvm_arch_flush_shadow_all(kvm); |
Lai Jiangshan | eda2bed | 2010-04-20 14:29:29 +0800 | [diff] [blame] | 414 | srcu_read_unlock(&kvm->srcu, idx); |
Marcelo Tosatti | 85db06e | 2008-12-10 21:23:26 +0100 | [diff] [blame] | 415 | } |
| 416 | |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 417 | static const struct mmu_notifier_ops kvm_mmu_notifier_ops = { |
| 418 | .invalidate_page = kvm_mmu_notifier_invalidate_page, |
| 419 | .invalidate_range_start = kvm_mmu_notifier_invalidate_range_start, |
| 420 | .invalidate_range_end = kvm_mmu_notifier_invalidate_range_end, |
| 421 | .clear_flush_young = kvm_mmu_notifier_clear_flush_young, |
Andrea Arcangeli | 8ee5382 | 2011-01-13 15:47:10 -0800 | [diff] [blame] | 422 | .test_young = kvm_mmu_notifier_test_young, |
Izik Eidus | 3da0dd4 | 2009-09-23 21:47:18 +0300 | [diff] [blame] | 423 | .change_pte = kvm_mmu_notifier_change_pte, |
Marcelo Tosatti | 85db06e | 2008-12-10 21:23:26 +0100 | [diff] [blame] | 424 | .release = kvm_mmu_notifier_release, |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 425 | }; |
Avi Kivity | 4c07b0a | 2009-12-20 14:54:04 +0200 | [diff] [blame] | 426 | |
| 427 | static int kvm_init_mmu_notifier(struct kvm *kvm) |
| 428 | { |
| 429 | kvm->mmu_notifier.ops = &kvm_mmu_notifier_ops; |
| 430 | return mmu_notifier_register(&kvm->mmu_notifier, current->mm); |
| 431 | } |
| 432 | |
| 433 | #else /* !(CONFIG_MMU_NOTIFIER && KVM_ARCH_WANT_MMU_NOTIFIER) */ |
| 434 | |
| 435 | static int kvm_init_mmu_notifier(struct kvm *kvm) |
| 436 | { |
| 437 | return 0; |
| 438 | } |
| 439 | |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 440 | #endif /* CONFIG_MMU_NOTIFIER && KVM_ARCH_WANT_MMU_NOTIFIER */ |
| 441 | |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 442 | static void kvm_init_memslots_id(struct kvm *kvm) |
| 443 | { |
| 444 | int i; |
| 445 | struct kvm_memslots *slots = kvm->memslots; |
| 446 | |
| 447 | for (i = 0; i < KVM_MEM_SLOTS_NUM; i++) |
Xiao Guangrong | f85e2cb | 2011-11-24 17:41:54 +0800 | [diff] [blame] | 448 | slots->id_to_index[i] = slots->memslots[i].id = i; |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 449 | } |
| 450 | |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 451 | static struct kvm *kvm_create_vm(unsigned long type) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 452 | { |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 453 | int r, i; |
| 454 | struct kvm *kvm = kvm_arch_alloc_vm(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 455 | |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 456 | if (!kvm) |
| 457 | return ERR_PTR(-ENOMEM); |
| 458 | |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 459 | r = kvm_arch_init_vm(kvm, type); |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 460 | if (r) |
| 461 | goto out_err_nodisable; |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 462 | |
| 463 | r = hardware_enable_all(); |
| 464 | if (r) |
| 465 | goto out_err_nodisable; |
| 466 | |
Avi Kivity | 75858a8 | 2009-01-04 17:10:50 +0200 | [diff] [blame] | 467 | #ifdef CONFIG_HAVE_KVM_IRQCHIP |
| 468 | INIT_HLIST_HEAD(&kvm->mask_notifier_list); |
Gleb Natapov | 136bdfe | 2009-08-24 11:54:23 +0300 | [diff] [blame] | 469 | INIT_HLIST_HEAD(&kvm->irq_ack_notifier_list); |
Avi Kivity | 75858a8 | 2009-01-04 17:10:50 +0200 | [diff] [blame] | 470 | #endif |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 471 | |
Marcelo Tosatti | 46a26bf | 2009-12-23 14:35:16 -0200 | [diff] [blame] | 472 | r = -ENOMEM; |
| 473 | kvm->memslots = kzalloc(sizeof(struct kvm_memslots), GFP_KERNEL); |
| 474 | if (!kvm->memslots) |
Jan Kiszka | 57e7fbe | 2010-11-09 12:42:12 +0100 | [diff] [blame] | 475 | goto out_err_nosrcu; |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 476 | kvm_init_memslots_id(kvm); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 477 | if (init_srcu_struct(&kvm->srcu)) |
Jan Kiszka | 57e7fbe | 2010-11-09 12:42:12 +0100 | [diff] [blame] | 478 | goto out_err_nosrcu; |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 479 | for (i = 0; i < KVM_NR_BUSES; i++) { |
| 480 | kvm->buses[i] = kzalloc(sizeof(struct kvm_io_bus), |
| 481 | GFP_KERNEL); |
Jan Kiszka | 57e7fbe | 2010-11-09 12:42:12 +0100 | [diff] [blame] | 482 | if (!kvm->buses[i]) |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 483 | goto out_err; |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 484 | } |
Mike Waychison | 74b5c5b | 2011-06-03 13:04:53 -0700 | [diff] [blame] | 485 | |
OGAWA Hirofumi | 85722cd | 2011-05-11 09:28:28 +0900 | [diff] [blame] | 486 | spin_lock_init(&kvm->mmu_lock); |
Avi Kivity | 6d4e4c4 | 2007-11-21 16:41:05 +0200 | [diff] [blame] | 487 | kvm->mm = current->mm; |
| 488 | atomic_inc(&kvm->mm->mm_count); |
Gregory Haskins | d34e6b1 | 2009-07-07 17:08:49 -0400 | [diff] [blame] | 489 | kvm_eventfd_init(kvm); |
Shaohua Li | 11ec280 | 2007-07-23 14:51:37 +0800 | [diff] [blame] | 490 | mutex_init(&kvm->lock); |
Marcelo Tosatti | 60eead7 | 2009-06-04 15:08:23 -0300 | [diff] [blame] | 491 | mutex_init(&kvm->irq_lock); |
Marcelo Tosatti | 79fac95 | 2009-12-23 14:35:26 -0200 | [diff] [blame] | 492 | mutex_init(&kvm->slots_lock); |
Izik Eidus | d39f13b | 2008-03-30 16:01:25 +0300 | [diff] [blame] | 493 | atomic_set(&kvm->users_count, 1); |
Mike Waychison | 74b5c5b | 2011-06-03 13:04:53 -0700 | [diff] [blame] | 494 | |
| 495 | r = kvm_init_mmu_notifier(kvm); |
| 496 | if (r) |
| 497 | goto out_err; |
| 498 | |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 499 | raw_spin_lock(&kvm_lock); |
Rusty Russell | 5e58cfe | 2007-07-23 17:08:21 +1000 | [diff] [blame] | 500 | list_add(&kvm->vm_list, &vm_list); |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 501 | raw_spin_unlock(&kvm_lock); |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 502 | |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 503 | return kvm; |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 504 | |
| 505 | out_err: |
Jan Kiszka | 57e7fbe | 2010-11-09 12:42:12 +0100 | [diff] [blame] | 506 | cleanup_srcu_struct(&kvm->srcu); |
| 507 | out_err_nosrcu: |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 508 | hardware_disable_all(); |
| 509 | out_err_nodisable: |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 510 | for (i = 0; i < KVM_NR_BUSES; i++) |
| 511 | kfree(kvm->buses[i]); |
Marcelo Tosatti | 46a26bf | 2009-12-23 14:35:16 -0200 | [diff] [blame] | 512 | kfree(kvm->memslots); |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 513 | kvm_arch_free_vm(kvm); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 514 | return ERR_PTR(r); |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 515 | } |
| 516 | |
Takuya Yoshikawa | 92eca8f | 2012-05-20 13:13:28 +0900 | [diff] [blame] | 517 | /* |
| 518 | * Avoid using vmalloc for a small buffer. |
| 519 | * Should not be used when the size is statically known. |
| 520 | */ |
Takuya Yoshikawa | c1a7b32 | 2012-05-20 13:15:07 +0900 | [diff] [blame] | 521 | void *kvm_kvzalloc(unsigned long size) |
Takuya Yoshikawa | 92eca8f | 2012-05-20 13:13:28 +0900 | [diff] [blame] | 522 | { |
| 523 | if (size > PAGE_SIZE) |
| 524 | return vzalloc(size); |
| 525 | else |
| 526 | return kzalloc(size, GFP_KERNEL); |
| 527 | } |
| 528 | |
Takuya Yoshikawa | c1a7b32 | 2012-05-20 13:15:07 +0900 | [diff] [blame] | 529 | void kvm_kvfree(const void *addr) |
Takuya Yoshikawa | 92eca8f | 2012-05-20 13:13:28 +0900 | [diff] [blame] | 530 | { |
| 531 | if (is_vmalloc_addr(addr)) |
| 532 | vfree(addr); |
| 533 | else |
| 534 | kfree(addr); |
| 535 | } |
| 536 | |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 537 | static void kvm_destroy_dirty_bitmap(struct kvm_memory_slot *memslot) |
| 538 | { |
| 539 | if (!memslot->dirty_bitmap) |
| 540 | return; |
| 541 | |
Takuya Yoshikawa | 92eca8f | 2012-05-20 13:13:28 +0900 | [diff] [blame] | 542 | kvm_kvfree(memslot->dirty_bitmap); |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 543 | memslot->dirty_bitmap = NULL; |
| 544 | } |
| 545 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 546 | /* |
| 547 | * Free any memory in @free but not in @dont. |
| 548 | */ |
| 549 | static void kvm_free_physmem_slot(struct kvm_memory_slot *free, |
| 550 | struct kvm_memory_slot *dont) |
| 551 | { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 552 | if (!dont || free->dirty_bitmap != dont->dirty_bitmap) |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 553 | kvm_destroy_dirty_bitmap(free); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 554 | |
Takuya Yoshikawa | db3fe4e | 2012-02-08 13:02:18 +0900 | [diff] [blame] | 555 | kvm_arch_free_memslot(free, dont); |
Marcelo Tosatti | 05da455 | 2008-02-23 11:44:30 -0300 | [diff] [blame] | 556 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 557 | free->npages = 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 558 | } |
| 559 | |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 560 | void kvm_free_physmem(struct kvm *kvm) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 561 | { |
Marcelo Tosatti | 46a26bf | 2009-12-23 14:35:16 -0200 | [diff] [blame] | 562 | struct kvm_memslots *slots = kvm->memslots; |
Xiao Guangrong | be6ba0f | 2011-11-24 17:39:18 +0800 | [diff] [blame] | 563 | struct kvm_memory_slot *memslot; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 564 | |
Xiao Guangrong | be6ba0f | 2011-11-24 17:39:18 +0800 | [diff] [blame] | 565 | kvm_for_each_memslot(memslot, slots) |
| 566 | kvm_free_physmem_slot(memslot, NULL); |
Marcelo Tosatti | 46a26bf | 2009-12-23 14:35:16 -0200 | [diff] [blame] | 567 | |
| 568 | kfree(kvm->memslots); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 569 | } |
| 570 | |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 571 | static void kvm_destroy_vm(struct kvm *kvm) |
| 572 | { |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 573 | int i; |
Avi Kivity | 6d4e4c4 | 2007-11-21 16:41:05 +0200 | [diff] [blame] | 574 | struct mm_struct *mm = kvm->mm; |
| 575 | |
Sheng Yang | ad8ba2c | 2009-01-06 10:03:02 +0800 | [diff] [blame] | 576 | kvm_arch_sync_events(kvm); |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 577 | raw_spin_lock(&kvm_lock); |
Avi Kivity | 133de90 | 2007-02-12 00:54:44 -0800 | [diff] [blame] | 578 | list_del(&kvm->vm_list); |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 579 | raw_spin_unlock(&kvm_lock); |
Avi Kivity | 399ec80 | 2008-11-19 13:58:46 +0200 | [diff] [blame] | 580 | kvm_free_irq_routing(kvm); |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 581 | for (i = 0; i < KVM_NR_BUSES; i++) |
| 582 | kvm_io_bus_destroy(kvm->buses[i]); |
Avi Kivity | 980da6c | 2009-12-20 15:13:43 +0200 | [diff] [blame] | 583 | kvm_coalesced_mmio_free(kvm); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 584 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) |
| 585 | mmu_notifier_unregister(&kvm->mmu_notifier, kvm->mm); |
Gleb Natapov | f00be0c | 2009-03-19 12:20:36 +0200 | [diff] [blame] | 586 | #else |
Marcelo Tosatti | 2df72e9 | 2012-08-24 15:54:57 -0300 | [diff] [blame] | 587 | kvm_arch_flush_shadow_all(kvm); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 588 | #endif |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 589 | kvm_arch_destroy_vm(kvm); |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 590 | kvm_free_physmem(kvm); |
| 591 | cleanup_srcu_struct(&kvm->srcu); |
| 592 | kvm_arch_free_vm(kvm); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 593 | hardware_disable_all(); |
Avi Kivity | 6d4e4c4 | 2007-11-21 16:41:05 +0200 | [diff] [blame] | 594 | mmdrop(mm); |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 595 | } |
| 596 | |
Izik Eidus | d39f13b | 2008-03-30 16:01:25 +0300 | [diff] [blame] | 597 | void kvm_get_kvm(struct kvm *kvm) |
| 598 | { |
| 599 | atomic_inc(&kvm->users_count); |
| 600 | } |
| 601 | EXPORT_SYMBOL_GPL(kvm_get_kvm); |
| 602 | |
| 603 | void kvm_put_kvm(struct kvm *kvm) |
| 604 | { |
| 605 | if (atomic_dec_and_test(&kvm->users_count)) |
| 606 | kvm_destroy_vm(kvm); |
| 607 | } |
| 608 | EXPORT_SYMBOL_GPL(kvm_put_kvm); |
| 609 | |
| 610 | |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 611 | static int kvm_vm_release(struct inode *inode, struct file *filp) |
| 612 | { |
| 613 | struct kvm *kvm = filp->private_data; |
| 614 | |
Gregory Haskins | 721eecb | 2009-05-20 10:30:49 -0400 | [diff] [blame] | 615 | kvm_irqfd_release(kvm); |
| 616 | |
Izik Eidus | d39f13b | 2008-03-30 16:01:25 +0300 | [diff] [blame] | 617 | kvm_put_kvm(kvm); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 618 | return 0; |
| 619 | } |
| 620 | |
Takuya Yoshikawa | 515a012 | 2010-10-27 18:23:54 +0900 | [diff] [blame] | 621 | /* |
| 622 | * Allocation size is twice as large as the actual dirty bitmap size. |
Takuya Yoshikawa | 93474b2 | 2012-03-01 19:34:45 +0900 | [diff] [blame] | 623 | * See x86's kvm_vm_ioctl_get_dirty_log() why this is needed. |
Takuya Yoshikawa | 515a012 | 2010-10-27 18:23:54 +0900 | [diff] [blame] | 624 | */ |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 625 | static int kvm_create_dirty_bitmap(struct kvm_memory_slot *memslot) |
| 626 | { |
Takuya Yoshikawa | 189a2f7 | 2012-02-08 13:01:09 +0900 | [diff] [blame] | 627 | #ifndef CONFIG_S390 |
Takuya Yoshikawa | 515a012 | 2010-10-27 18:23:54 +0900 | [diff] [blame] | 628 | unsigned long dirty_bytes = 2 * kvm_dirty_bitmap_bytes(memslot); |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 629 | |
Takuya Yoshikawa | 92eca8f | 2012-05-20 13:13:28 +0900 | [diff] [blame] | 630 | memslot->dirty_bitmap = kvm_kvzalloc(dirty_bytes); |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 631 | if (!memslot->dirty_bitmap) |
| 632 | return -ENOMEM; |
| 633 | |
Takuya Yoshikawa | 189a2f7 | 2012-02-08 13:01:09 +0900 | [diff] [blame] | 634 | #endif /* !CONFIG_S390 */ |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 635 | return 0; |
| 636 | } |
| 637 | |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 638 | static int cmp_memslot(const void *slot1, const void *slot2) |
| 639 | { |
| 640 | struct kvm_memory_slot *s1, *s2; |
| 641 | |
| 642 | s1 = (struct kvm_memory_slot *)slot1; |
| 643 | s2 = (struct kvm_memory_slot *)slot2; |
| 644 | |
| 645 | if (s1->npages < s2->npages) |
| 646 | return 1; |
| 647 | if (s1->npages > s2->npages) |
| 648 | return -1; |
| 649 | |
| 650 | return 0; |
| 651 | } |
| 652 | |
| 653 | /* |
| 654 | * Sort the memslots base on its size, so the larger slots |
| 655 | * will get better fit. |
| 656 | */ |
| 657 | static void sort_memslots(struct kvm_memslots *slots) |
| 658 | { |
Xiao Guangrong | f85e2cb | 2011-11-24 17:41:54 +0800 | [diff] [blame] | 659 | int i; |
| 660 | |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 661 | sort(slots->memslots, KVM_MEM_SLOTS_NUM, |
| 662 | sizeof(struct kvm_memory_slot), cmp_memslot, NULL); |
Xiao Guangrong | f85e2cb | 2011-11-24 17:41:54 +0800 | [diff] [blame] | 663 | |
| 664 | for (i = 0; i < KVM_MEM_SLOTS_NUM; i++) |
| 665 | slots->id_to_index[slots->memslots[i].id] = i; |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 666 | } |
| 667 | |
Xiao Guangrong | be593d6 | 2011-11-24 17:38:24 +0800 | [diff] [blame] | 668 | void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new) |
| 669 | { |
| 670 | if (new) { |
| 671 | int id = new->id; |
Xiao Guangrong | 28a3754 | 2011-11-24 19:04:35 +0800 | [diff] [blame] | 672 | struct kvm_memory_slot *old = id_to_memslot(slots, id); |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 673 | unsigned long npages = old->npages; |
Xiao Guangrong | be593d6 | 2011-11-24 17:38:24 +0800 | [diff] [blame] | 674 | |
Xiao Guangrong | 28a3754 | 2011-11-24 19:04:35 +0800 | [diff] [blame] | 675 | *old = *new; |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 676 | if (new->npages != npages) |
| 677 | sort_memslots(slots); |
Xiao Guangrong | be593d6 | 2011-11-24 17:38:24 +0800 | [diff] [blame] | 678 | } |
| 679 | |
| 680 | slots->generation++; |
| 681 | } |
| 682 | |
Xiao Guangrong | a50d64d | 2012-08-21 10:58:13 +0800 | [diff] [blame] | 683 | static int check_memory_region_flags(struct kvm_userspace_memory_region *mem) |
| 684 | { |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 685 | u32 valid_flags = KVM_MEM_LOG_DIRTY_PAGES; |
| 686 | |
| 687 | #ifdef KVM_CAP_READONLY_MEM |
| 688 | valid_flags |= KVM_MEM_READONLY; |
| 689 | #endif |
| 690 | |
| 691 | if (mem->flags & ~valid_flags) |
Xiao Guangrong | a50d64d | 2012-08-21 10:58:13 +0800 | [diff] [blame] | 692 | return -EINVAL; |
| 693 | |
| 694 | return 0; |
| 695 | } |
| 696 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 697 | /* |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 698 | * Allocate some memory and give it an address in the guest physical address |
| 699 | * space. |
| 700 | * |
| 701 | * Discontiguous memory is allowed, mostly for framebuffers. |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 702 | * |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 703 | * Must be called holding mmap_sem for write. |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 704 | */ |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 705 | int __kvm_set_memory_region(struct kvm *kvm, |
| 706 | struct kvm_userspace_memory_region *mem, |
| 707 | int user_alloc) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 708 | { |
Avi Kivity | 8234b22 | 2010-12-27 12:08:45 +0200 | [diff] [blame] | 709 | int r; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 710 | gfn_t base_gfn; |
Heiko Carstens | 28bcb11 | 2009-09-03 17:35:35 +0200 | [diff] [blame] | 711 | unsigned long npages; |
| 712 | unsigned long i; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 713 | struct kvm_memory_slot *memslot; |
| 714 | struct kvm_memory_slot old, new; |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 715 | struct kvm_memslots *slots, *old_memslots; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 716 | |
Xiao Guangrong | a50d64d | 2012-08-21 10:58:13 +0800 | [diff] [blame] | 717 | r = check_memory_region_flags(mem); |
| 718 | if (r) |
| 719 | goto out; |
| 720 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 721 | r = -EINVAL; |
| 722 | /* General sanity checks */ |
| 723 | if (mem->memory_size & (PAGE_SIZE - 1)) |
| 724 | goto out; |
| 725 | if (mem->guest_phys_addr & (PAGE_SIZE - 1)) |
| 726 | goto out; |
Takuya Yoshikawa | fa3d315 | 2011-05-07 16:35:38 +0900 | [diff] [blame] | 727 | /* We can read the guest memory with __xxx_user() later on. */ |
| 728 | if (user_alloc && |
| 729 | ((mem->userspace_addr & (PAGE_SIZE - 1)) || |
Heiko Carstens | 9e3bb6b | 2011-05-24 07:51:27 +0200 | [diff] [blame] | 730 | !access_ok(VERIFY_WRITE, |
| 731 | (void __user *)(unsigned long)mem->userspace_addr, |
| 732 | mem->memory_size))) |
Hollis Blanchard | 7874980 | 2008-11-07 13:32:12 -0600 | [diff] [blame] | 733 | goto out; |
Xiao Guangrong | 93a5cef | 2011-11-24 17:37:48 +0800 | [diff] [blame] | 734 | if (mem->slot >= KVM_MEM_SLOTS_NUM) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 735 | goto out; |
| 736 | if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr) |
| 737 | goto out; |
| 738 | |
Xiao Guangrong | 28a3754 | 2011-11-24 19:04:35 +0800 | [diff] [blame] | 739 | memslot = id_to_memslot(kvm->memslots, mem->slot); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 740 | base_gfn = mem->guest_phys_addr >> PAGE_SHIFT; |
| 741 | npages = mem->memory_size >> PAGE_SHIFT; |
| 742 | |
Takuya Yoshikawa | 660c22c | 2010-04-13 22:47:24 +0900 | [diff] [blame] | 743 | r = -EINVAL; |
| 744 | if (npages > KVM_MEM_MAX_NR_PAGES) |
| 745 | goto out; |
| 746 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 747 | if (!npages) |
| 748 | mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES; |
| 749 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 750 | new = old = *memslot; |
| 751 | |
Avi Kivity | e36d96f | 2010-06-21 10:56:36 +0300 | [diff] [blame] | 752 | new.id = mem->slot; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 753 | new.base_gfn = base_gfn; |
| 754 | new.npages = npages; |
| 755 | new.flags = mem->flags; |
| 756 | |
| 757 | /* Disallow changing a memory slot's size. */ |
| 758 | r = -EINVAL; |
| 759 | if (npages && old.npages && npages != old.npages) |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 760 | goto out_free; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 761 | |
| 762 | /* Check for overlaps */ |
| 763 | r = -EEXIST; |
| 764 | for (i = 0; i < KVM_MEMORY_SLOTS; ++i) { |
Marcelo Tosatti | 46a26bf | 2009-12-23 14:35:16 -0200 | [diff] [blame] | 765 | struct kvm_memory_slot *s = &kvm->memslots->memslots[i]; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 766 | |
Jan Kiszka | 4cd481f | 2009-04-13 11:59:32 +0200 | [diff] [blame] | 767 | if (s == memslot || !s->npages) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 768 | continue; |
| 769 | if (!((base_gfn + npages <= s->base_gfn) || |
| 770 | (base_gfn >= s->base_gfn + s->npages))) |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 771 | goto out_free; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 772 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 773 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 774 | /* Free page dirty bitmap if unneeded */ |
| 775 | if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES)) |
Al Viro | 8b6d44c | 2007-02-09 16:38:40 +0000 | [diff] [blame] | 776 | new.dirty_bitmap = NULL; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 777 | |
| 778 | r = -ENOMEM; |
| 779 | |
| 780 | /* Allocate if a slot is being created */ |
Takuya Yoshikawa | 189a2f7 | 2012-02-08 13:01:09 +0900 | [diff] [blame] | 781 | if (npages && !old.npages) { |
| 782 | new.user_alloc = user_alloc; |
| 783 | new.userspace_addr = mem->userspace_addr; |
Takuya Yoshikawa | d89cc61 | 2012-08-01 18:03:28 +0900 | [diff] [blame] | 784 | |
Takuya Yoshikawa | db3fe4e | 2012-02-08 13:02:18 +0900 | [diff] [blame] | 785 | if (kvm_arch_create_memslot(&new, npages)) |
| 786 | goto out_free; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 787 | } |
Joerg Roedel | ec04b26 | 2009-06-19 15:16:23 +0200 | [diff] [blame] | 788 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 789 | /* Allocate page dirty bitmap if needed */ |
| 790 | if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) { |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 791 | if (kvm_create_dirty_bitmap(&new) < 0) |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 792 | goto out_free; |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 793 | /* destroy any largepage mappings for dirty tracking */ |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 794 | } |
| 795 | |
Marcelo Tosatti | 12d6e75 | 2012-08-24 15:54:58 -0300 | [diff] [blame] | 796 | if (!npages || base_gfn != old.base_gfn) { |
Xiao Guangrong | 28a3754 | 2011-11-24 19:04:35 +0800 | [diff] [blame] | 797 | struct kvm_memory_slot *slot; |
| 798 | |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 799 | r = -ENOMEM; |
Thomas Meyer | 6da64fd | 2011-11-08 20:32:19 +0100 | [diff] [blame] | 800 | slots = kmemdup(kvm->memslots, sizeof(struct kvm_memslots), |
| 801 | GFP_KERNEL); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 802 | if (!slots) |
| 803 | goto out_free; |
Xiao Guangrong | 28a3754 | 2011-11-24 19:04:35 +0800 | [diff] [blame] | 804 | slot = id_to_memslot(slots, mem->slot); |
| 805 | slot->flags |= KVM_MEMSLOT_INVALID; |
| 806 | |
Xiao Guangrong | be593d6 | 2011-11-24 17:38:24 +0800 | [diff] [blame] | 807 | update_memslots(slots, NULL); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 808 | |
| 809 | old_memslots = kvm->memslots; |
| 810 | rcu_assign_pointer(kvm->memslots, slots); |
| 811 | synchronize_srcu_expedited(&kvm->srcu); |
Marcelo Tosatti | 12d6e75 | 2012-08-24 15:54:58 -0300 | [diff] [blame] | 812 | /* From this point no new shadow pages pointing to a deleted, |
| 813 | * or moved, memslot will be created. |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 814 | * |
| 815 | * validation of sp->gfn happens in: |
| 816 | * - gfn_to_hva (kvm_read_guest, gfn_to_pfn) |
| 817 | * - kvm_is_visible_gfn (mmu_check_roots) |
| 818 | */ |
Marcelo Tosatti | 2df72e9 | 2012-08-24 15:54:57 -0300 | [diff] [blame] | 819 | kvm_arch_flush_shadow_memslot(kvm, slot); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 820 | kfree(old_memslots); |
| 821 | } |
Marcelo Tosatti | 34d4cb8 | 2008-07-10 20:49:31 -0300 | [diff] [blame] | 822 | |
Marcelo Tosatti | f7784b8 | 2009-12-23 14:35:18 -0200 | [diff] [blame] | 823 | r = kvm_arch_prepare_memory_region(kvm, &new, old, mem, user_alloc); |
| 824 | if (r) |
| 825 | goto out_free; |
| 826 | |
Alex Williamson | 32f6daa | 2012-04-11 09:51:49 -0600 | [diff] [blame] | 827 | /* map/unmap the pages in iommu page table */ |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 828 | if (npages) { |
| 829 | r = kvm_iommu_map_pages(kvm, &new); |
| 830 | if (r) |
| 831 | goto out_free; |
Alex Williamson | 32f6daa | 2012-04-11 09:51:49 -0600 | [diff] [blame] | 832 | } else |
| 833 | kvm_iommu_unmap_pages(kvm, &old); |
Andrea Arcangeli | 604b38a | 2008-07-25 16:32:03 +0200 | [diff] [blame] | 834 | |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 835 | r = -ENOMEM; |
Thomas Meyer | 6da64fd | 2011-11-08 20:32:19 +0100 | [diff] [blame] | 836 | slots = kmemdup(kvm->memslots, sizeof(struct kvm_memslots), |
| 837 | GFP_KERNEL); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 838 | if (!slots) |
| 839 | goto out_free; |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 840 | |
| 841 | /* actual memory is freed via old in kvm_free_physmem_slot below */ |
| 842 | if (!npages) { |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 843 | new.dirty_bitmap = NULL; |
Takuya Yoshikawa | db3fe4e | 2012-02-08 13:02:18 +0900 | [diff] [blame] | 844 | memset(&new.arch, 0, sizeof(new.arch)); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 845 | } |
| 846 | |
Xiao Guangrong | be593d6 | 2011-11-24 17:38:24 +0800 | [diff] [blame] | 847 | update_memslots(slots, &new); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 848 | old_memslots = kvm->memslots; |
| 849 | rcu_assign_pointer(kvm->memslots, slots); |
| 850 | synchronize_srcu_expedited(&kvm->srcu); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 851 | |
Marcelo Tosatti | f7784b8 | 2009-12-23 14:35:18 -0200 | [diff] [blame] | 852 | kvm_arch_commit_memory_region(kvm, mem, old, user_alloc); |
Zhang Xiantao | 3ad82a7 | 2007-11-20 13:11:38 +0800 | [diff] [blame] | 853 | |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 854 | kvm_free_physmem_slot(&old, &new); |
| 855 | kfree(old_memslots); |
| 856 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 857 | return 0; |
| 858 | |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 859 | out_free: |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 860 | kvm_free_physmem_slot(&new, &old); |
| 861 | out: |
| 862 | return r; |
Izik Eidus | 210c7c4 | 2007-10-24 23:52:57 +0200 | [diff] [blame] | 863 | |
| 864 | } |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 865 | EXPORT_SYMBOL_GPL(__kvm_set_memory_region); |
| 866 | |
| 867 | int kvm_set_memory_region(struct kvm *kvm, |
| 868 | struct kvm_userspace_memory_region *mem, |
| 869 | int user_alloc) |
| 870 | { |
| 871 | int r; |
| 872 | |
Marcelo Tosatti | 79fac95 | 2009-12-23 14:35:26 -0200 | [diff] [blame] | 873 | mutex_lock(&kvm->slots_lock); |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 874 | r = __kvm_set_memory_region(kvm, mem, user_alloc); |
Marcelo Tosatti | 79fac95 | 2009-12-23 14:35:26 -0200 | [diff] [blame] | 875 | mutex_unlock(&kvm->slots_lock); |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 876 | return r; |
| 877 | } |
Izik Eidus | 210c7c4 | 2007-10-24 23:52:57 +0200 | [diff] [blame] | 878 | EXPORT_SYMBOL_GPL(kvm_set_memory_region); |
| 879 | |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 880 | int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, |
| 881 | struct |
| 882 | kvm_userspace_memory_region *mem, |
| 883 | int user_alloc) |
Izik Eidus | 210c7c4 | 2007-10-24 23:52:57 +0200 | [diff] [blame] | 884 | { |
Izik Eidus | e0d62c7 | 2007-10-24 23:57:46 +0200 | [diff] [blame] | 885 | if (mem->slot >= KVM_MEMORY_SLOTS) |
| 886 | return -EINVAL; |
Izik Eidus | 210c7c4 | 2007-10-24 23:52:57 +0200 | [diff] [blame] | 887 | return kvm_set_memory_region(kvm, mem, user_alloc); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 888 | } |
| 889 | |
Zhang Xiantao | 5bb064d | 2007-11-18 20:29:43 +0800 | [diff] [blame] | 890 | int kvm_get_dirty_log(struct kvm *kvm, |
| 891 | struct kvm_dirty_log *log, int *is_dirty) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 892 | { |
| 893 | struct kvm_memory_slot *memslot; |
| 894 | int r, i; |
Takuya Yoshikawa | 87bf6e7 | 2010-04-12 19:35:35 +0900 | [diff] [blame] | 895 | unsigned long n; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 896 | unsigned long any = 0; |
| 897 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 898 | r = -EINVAL; |
| 899 | if (log->slot >= KVM_MEMORY_SLOTS) |
| 900 | goto out; |
| 901 | |
Xiao Guangrong | 28a3754 | 2011-11-24 19:04:35 +0800 | [diff] [blame] | 902 | memslot = id_to_memslot(kvm->memslots, log->slot); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 903 | r = -ENOENT; |
| 904 | if (!memslot->dirty_bitmap) |
| 905 | goto out; |
| 906 | |
Takuya Yoshikawa | 87bf6e7 | 2010-04-12 19:35:35 +0900 | [diff] [blame] | 907 | n = kvm_dirty_bitmap_bytes(memslot); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 908 | |
Uri Lublin | cd1a4a9 | 2007-02-22 16:43:09 +0200 | [diff] [blame] | 909 | for (i = 0; !any && i < n/sizeof(long); ++i) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 910 | any = memslot->dirty_bitmap[i]; |
| 911 | |
| 912 | r = -EFAULT; |
| 913 | if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n)) |
| 914 | goto out; |
| 915 | |
Zhang Xiantao | 5bb064d | 2007-11-18 20:29:43 +0800 | [diff] [blame] | 916 | if (any) |
| 917 | *is_dirty = 1; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 918 | |
| 919 | r = 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 920 | out: |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 921 | return r; |
| 922 | } |
| 923 | |
Takuya Yoshikawa | db3fe4e | 2012-02-08 13:02:18 +0900 | [diff] [blame] | 924 | bool kvm_largepages_enabled(void) |
| 925 | { |
| 926 | return largepages_enabled; |
| 927 | } |
| 928 | |
Marcelo Tosatti | 54dee99 | 2009-06-11 12:07:44 -0300 | [diff] [blame] | 929 | void kvm_disable_largepages(void) |
| 930 | { |
| 931 | largepages_enabled = false; |
| 932 | } |
| 933 | EXPORT_SYMBOL_GPL(kvm_disable_largepages); |
| 934 | |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 935 | struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn) |
| 936 | { |
| 937 | return __gfn_to_memslot(kvm_memslots(kvm), gfn); |
| 938 | } |
Avi Kivity | a1f4d395 | 2010-06-21 11:44:20 +0300 | [diff] [blame] | 939 | EXPORT_SYMBOL_GPL(gfn_to_memslot); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 940 | |
Izik Eidus | e0d62c7 | 2007-10-24 23:57:46 +0200 | [diff] [blame] | 941 | int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn) |
| 942 | { |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 943 | struct kvm_memory_slot *memslot = gfn_to_memslot(kvm, gfn); |
Izik Eidus | e0d62c7 | 2007-10-24 23:57:46 +0200 | [diff] [blame] | 944 | |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 945 | if (!memslot || memslot->id >= KVM_MEMORY_SLOTS || |
| 946 | memslot->flags & KVM_MEMSLOT_INVALID) |
| 947 | return 0; |
Izik Eidus | e0d62c7 | 2007-10-24 23:57:46 +0200 | [diff] [blame] | 948 | |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 949 | return 1; |
Izik Eidus | e0d62c7 | 2007-10-24 23:57:46 +0200 | [diff] [blame] | 950 | } |
| 951 | EXPORT_SYMBOL_GPL(kvm_is_visible_gfn); |
| 952 | |
Joerg Roedel | 8f0b1ab | 2010-01-28 12:37:56 +0100 | [diff] [blame] | 953 | unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn) |
| 954 | { |
| 955 | struct vm_area_struct *vma; |
| 956 | unsigned long addr, size; |
| 957 | |
| 958 | size = PAGE_SIZE; |
| 959 | |
| 960 | addr = gfn_to_hva(kvm, gfn); |
| 961 | if (kvm_is_error_hva(addr)) |
| 962 | return PAGE_SIZE; |
| 963 | |
| 964 | down_read(¤t->mm->mmap_sem); |
| 965 | vma = find_vma(current->mm, addr); |
| 966 | if (!vma) |
| 967 | goto out; |
| 968 | |
| 969 | size = vma_kernel_pagesize(vma); |
| 970 | |
| 971 | out: |
| 972 | up_read(¤t->mm->mmap_sem); |
| 973 | |
| 974 | return size; |
| 975 | } |
| 976 | |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 977 | static bool memslot_is_readonly(struct kvm_memory_slot *slot) |
| 978 | { |
| 979 | return slot->flags & KVM_MEM_READONLY; |
| 980 | } |
| 981 | |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 982 | static unsigned long __gfn_to_hva_many(struct kvm_memory_slot *slot, gfn_t gfn, |
| 983 | gfn_t *nr_pages, bool write) |
Izik Eidus | 539cb66 | 2007-11-11 22:05:04 +0200 | [diff] [blame] | 984 | { |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 985 | if (!slot || slot->flags & KVM_MEMSLOT_INVALID) |
Xiao Guangrong | ca3a490 | 2012-08-21 11:01:50 +0800 | [diff] [blame] | 986 | return KVM_HVA_ERR_BAD; |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 987 | |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 988 | if (memslot_is_readonly(slot) && write) |
| 989 | return KVM_HVA_ERR_RO_BAD; |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 990 | |
| 991 | if (nr_pages) |
| 992 | *nr_pages = slot->npages - (gfn - slot->base_gfn); |
| 993 | |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 994 | return __gfn_to_hva_memslot(slot, gfn); |
Izik Eidus | 539cb66 | 2007-11-11 22:05:04 +0200 | [diff] [blame] | 995 | } |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 996 | |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 997 | static unsigned long gfn_to_hva_many(struct kvm_memory_slot *slot, gfn_t gfn, |
| 998 | gfn_t *nr_pages) |
| 999 | { |
| 1000 | return __gfn_to_hva_many(slot, gfn, nr_pages, true); |
| 1001 | } |
| 1002 | |
| 1003 | unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, |
| 1004 | gfn_t gfn) |
| 1005 | { |
| 1006 | return gfn_to_hva_many(slot, gfn, NULL); |
| 1007 | } |
| 1008 | EXPORT_SYMBOL_GPL(gfn_to_hva_memslot); |
| 1009 | |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 1010 | unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn) |
| 1011 | { |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1012 | return gfn_to_hva_many(gfn_to_memslot(kvm, gfn), gfn, NULL); |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 1013 | } |
Sheng Yang | 0d15029 | 2008-04-25 21:44:50 +0800 | [diff] [blame] | 1014 | EXPORT_SYMBOL_GPL(gfn_to_hva); |
Izik Eidus | 539cb66 | 2007-11-11 22:05:04 +0200 | [diff] [blame] | 1015 | |
Xiao Guangrong | 86ab8cf | 2012-08-21 10:59:53 +0800 | [diff] [blame] | 1016 | /* |
| 1017 | * The hva returned by this function is only allowed to be read. |
| 1018 | * It should pair with kvm_read_hva() or kvm_read_hva_atomic(). |
| 1019 | */ |
| 1020 | static unsigned long gfn_to_hva_read(struct kvm *kvm, gfn_t gfn) |
Gleb Natapov | 8030089 | 2010-10-19 18:13:41 +0200 | [diff] [blame] | 1021 | { |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1022 | return __gfn_to_hva_many(gfn_to_memslot(kvm, gfn), gfn, NULL, false); |
Xiao Guangrong | 86ab8cf | 2012-08-21 10:59:53 +0800 | [diff] [blame] | 1023 | } |
| 1024 | |
| 1025 | static int kvm_read_hva(void *data, void __user *hva, int len) |
| 1026 | { |
| 1027 | return __copy_from_user(data, hva, len); |
| 1028 | } |
| 1029 | |
| 1030 | static int kvm_read_hva_atomic(void *data, void __user *hva, int len) |
| 1031 | { |
| 1032 | return __copy_from_user_inatomic(data, hva, len); |
Gleb Natapov | 8030089 | 2010-10-19 18:13:41 +0200 | [diff] [blame] | 1033 | } |
| 1034 | |
Gleb Natapov | 0857b9e | 2011-02-01 13:21:47 +0200 | [diff] [blame] | 1035 | int get_user_page_nowait(struct task_struct *tsk, struct mm_struct *mm, |
| 1036 | unsigned long start, int write, struct page **page) |
| 1037 | { |
| 1038 | int flags = FOLL_TOUCH | FOLL_NOWAIT | FOLL_HWPOISON | FOLL_GET; |
| 1039 | |
| 1040 | if (write) |
| 1041 | flags |= FOLL_WRITE; |
| 1042 | |
| 1043 | return __get_user_pages(tsk, mm, start, 1, flags, page, NULL, NULL); |
| 1044 | } |
| 1045 | |
Huang Ying | fafc3db | 2011-01-30 11:15:49 +0800 | [diff] [blame] | 1046 | static inline int check_user_page_hwpoison(unsigned long addr) |
| 1047 | { |
| 1048 | int rc, flags = FOLL_TOUCH | FOLL_HWPOISON | FOLL_WRITE; |
| 1049 | |
| 1050 | rc = __get_user_pages(current, current->mm, addr, 1, |
| 1051 | flags, NULL, NULL, NULL); |
| 1052 | return rc == -EHWPOISON; |
| 1053 | } |
| 1054 | |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1055 | /* |
| 1056 | * The atomic path to get the writable pfn which will be stored in @pfn, |
| 1057 | * true indicates success, otherwise false is returned. |
| 1058 | */ |
| 1059 | static bool hva_to_pfn_fast(unsigned long addr, bool atomic, bool *async, |
| 1060 | bool write_fault, bool *writable, pfn_t *pfn) |
| 1061 | { |
| 1062 | struct page *page[1]; |
| 1063 | int npages; |
| 1064 | |
| 1065 | if (!(async || atomic)) |
| 1066 | return false; |
| 1067 | |
Xiao Guangrong | 12ce13f | 2012-08-21 11:00:49 +0800 | [diff] [blame] | 1068 | /* |
| 1069 | * Fast pin a writable pfn only if it is a write fault request |
| 1070 | * or the caller allows to map a writable pfn for a read fault |
| 1071 | * request. |
| 1072 | */ |
| 1073 | if (!(write_fault || writable)) |
| 1074 | return false; |
| 1075 | |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1076 | npages = __get_user_pages_fast(addr, 1, 1, page); |
| 1077 | if (npages == 1) { |
| 1078 | *pfn = page_to_pfn(page[0]); |
| 1079 | |
| 1080 | if (writable) |
| 1081 | *writable = true; |
| 1082 | return true; |
| 1083 | } |
| 1084 | |
| 1085 | return false; |
| 1086 | } |
| 1087 | |
| 1088 | /* |
| 1089 | * The slow path to get the pfn of the specified host virtual address, |
| 1090 | * 1 indicates success, -errno is returned if error is detected. |
| 1091 | */ |
| 1092 | static int hva_to_pfn_slow(unsigned long addr, bool *async, bool write_fault, |
| 1093 | bool *writable, pfn_t *pfn) |
Avi Kivity | 954bbbc | 2007-03-30 14:02:32 +0300 | [diff] [blame] | 1094 | { |
Anthony Liguori | 8d4e128 | 2007-10-18 09:59:34 -0500 | [diff] [blame] | 1095 | struct page *page[1]; |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 1096 | int npages = 0; |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1097 | |
| 1098 | might_sleep(); |
| 1099 | |
| 1100 | if (writable) |
| 1101 | *writable = write_fault; |
| 1102 | |
| 1103 | if (async) { |
| 1104 | down_read(¤t->mm->mmap_sem); |
| 1105 | npages = get_user_page_nowait(current, current->mm, |
| 1106 | addr, write_fault, page); |
| 1107 | up_read(¤t->mm->mmap_sem); |
| 1108 | } else |
| 1109 | npages = get_user_pages_fast(addr, 1, write_fault, |
| 1110 | page); |
| 1111 | if (npages != 1) |
| 1112 | return npages; |
| 1113 | |
| 1114 | /* map read fault as writable if possible */ |
Xiao Guangrong | 12ce13f | 2012-08-21 11:00:49 +0800 | [diff] [blame] | 1115 | if (unlikely(!write_fault) && writable) { |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1116 | struct page *wpage[1]; |
| 1117 | |
| 1118 | npages = __get_user_pages_fast(addr, 1, 1, wpage); |
| 1119 | if (npages == 1) { |
| 1120 | *writable = true; |
| 1121 | put_page(page[0]); |
| 1122 | page[0] = wpage[0]; |
| 1123 | } |
| 1124 | |
| 1125 | npages = 1; |
| 1126 | } |
| 1127 | *pfn = page_to_pfn(page[0]); |
| 1128 | return npages; |
| 1129 | } |
| 1130 | |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1131 | static bool vma_is_valid(struct vm_area_struct *vma, bool write_fault) |
| 1132 | { |
| 1133 | if (unlikely(!(vma->vm_flags & VM_READ))) |
| 1134 | return false; |
| 1135 | |
| 1136 | if (write_fault && (unlikely(!(vma->vm_flags & VM_WRITE)))) |
| 1137 | return false; |
| 1138 | |
| 1139 | return true; |
| 1140 | } |
| 1141 | |
Xiao Guangrong | 12ce13f | 2012-08-21 11:00:49 +0800 | [diff] [blame] | 1142 | /* |
| 1143 | * Pin guest page in memory and return its pfn. |
| 1144 | * @addr: host virtual address which maps memory to the guest |
| 1145 | * @atomic: whether this function can sleep |
| 1146 | * @async: whether this function need to wait IO complete if the |
| 1147 | * host page is not in the memory |
| 1148 | * @write_fault: whether we should get a writable host page |
| 1149 | * @writable: whether it allows to map a writable host page for !@write_fault |
| 1150 | * |
| 1151 | * The function will map a writable host page for these two cases: |
| 1152 | * 1): @write_fault = true |
| 1153 | * 2): @write_fault = false && @writable, @writable will tell the caller |
| 1154 | * whether the mapping is writable. |
| 1155 | */ |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1156 | static pfn_t hva_to_pfn(unsigned long addr, bool atomic, bool *async, |
| 1157 | bool write_fault, bool *writable) |
| 1158 | { |
| 1159 | struct vm_area_struct *vma; |
| 1160 | pfn_t pfn = 0; |
| 1161 | int npages; |
Avi Kivity | 954bbbc | 2007-03-30 14:02:32 +0300 | [diff] [blame] | 1162 | |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 1163 | /* we can do it either atomically or asynchronously, not both */ |
| 1164 | BUG_ON(atomic && async); |
| 1165 | |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1166 | if (hva_to_pfn_fast(addr, atomic, async, write_fault, writable, &pfn)) |
| 1167 | return pfn; |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1168 | |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1169 | if (atomic) |
| 1170 | return KVM_PFN_ERR_FAULT; |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1171 | |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1172 | npages = hva_to_pfn_slow(addr, async, write_fault, writable, &pfn); |
| 1173 | if (npages == 1) |
| 1174 | return pfn; |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 1175 | |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1176 | down_read(¤t->mm->mmap_sem); |
| 1177 | if (npages == -EHWPOISON || |
| 1178 | (!async && check_user_page_hwpoison(addr))) { |
| 1179 | pfn = KVM_PFN_ERR_HWPOISON; |
| 1180 | goto exit; |
Xiao Guangrong | 887c08a | 2010-08-22 19:10:28 +0800 | [diff] [blame] | 1181 | } |
Izik Eidus | 539cb66 | 2007-11-11 22:05:04 +0200 | [diff] [blame] | 1182 | |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1183 | vma = find_vma_intersection(current->mm, addr, addr + 1); |
Anthony Liguori | 8d4e128 | 2007-10-18 09:59:34 -0500 | [diff] [blame] | 1184 | |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1185 | if (vma == NULL) |
| 1186 | pfn = KVM_PFN_ERR_FAULT; |
| 1187 | else if ((vma->vm_flags & VM_PFNMAP)) { |
| 1188 | pfn = ((addr - vma->vm_start) >> PAGE_SHIFT) + |
| 1189 | vma->vm_pgoff; |
| 1190 | BUG_ON(!kvm_is_mmio_pfn(pfn)); |
| 1191 | } else { |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1192 | if (async && vma_is_valid(vma, write_fault)) |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1193 | *async = true; |
| 1194 | pfn = KVM_PFN_ERR_FAULT; |
| 1195 | } |
| 1196 | exit: |
| 1197 | up_read(¤t->mm->mmap_sem); |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1198 | return pfn; |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1199 | } |
| 1200 | |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1201 | static pfn_t |
| 1202 | __gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn, bool atomic, |
| 1203 | bool *async, bool write_fault, bool *writable) |
Xiao Guangrong | 887c08a | 2010-08-22 19:10:28 +0800 | [diff] [blame] | 1204 | { |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1205 | unsigned long addr = __gfn_to_hva_many(slot, gfn, NULL, write_fault); |
| 1206 | |
| 1207 | if (addr == KVM_HVA_ERR_RO_BAD) |
| 1208 | return KVM_PFN_ERR_RO_FAULT; |
| 1209 | |
| 1210 | if (kvm_is_error_hva(addr)) |
| 1211 | return KVM_PFN_ERR_BAD; |
| 1212 | |
| 1213 | /* Do not map writable pfn in the readonly memslot. */ |
| 1214 | if (writable && memslot_is_readonly(slot)) { |
| 1215 | *writable = false; |
| 1216 | writable = NULL; |
| 1217 | } |
| 1218 | |
| 1219 | return hva_to_pfn(addr, atomic, async, write_fault, |
| 1220 | writable); |
Xiao Guangrong | 887c08a | 2010-08-22 19:10:28 +0800 | [diff] [blame] | 1221 | } |
Xiao Guangrong | 887c08a | 2010-08-22 19:10:28 +0800 | [diff] [blame] | 1222 | |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1223 | static pfn_t __gfn_to_pfn(struct kvm *kvm, gfn_t gfn, bool atomic, bool *async, |
| 1224 | bool write_fault, bool *writable) |
Marcelo Tosatti | 506f0d6 | 2009-12-23 14:35:19 -0200 | [diff] [blame] | 1225 | { |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1226 | struct kvm_memory_slot *slot; |
Marcelo Tosatti | 506f0d6 | 2009-12-23 14:35:19 -0200 | [diff] [blame] | 1227 | |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 1228 | if (async) |
| 1229 | *async = false; |
| 1230 | |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1231 | slot = gfn_to_memslot(kvm, gfn); |
Marcelo Tosatti | 506f0d6 | 2009-12-23 14:35:19 -0200 | [diff] [blame] | 1232 | |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1233 | return __gfn_to_pfn_memslot(slot, gfn, atomic, async, write_fault, |
| 1234 | writable); |
Xiao Guangrong | 365fb3f | 2010-08-28 19:24:13 +0800 | [diff] [blame] | 1235 | } |
| 1236 | |
| 1237 | pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn) |
| 1238 | { |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1239 | return __gfn_to_pfn(kvm, gfn, true, NULL, true, NULL); |
Xiao Guangrong | 365fb3f | 2010-08-28 19:24:13 +0800 | [diff] [blame] | 1240 | } |
| 1241 | EXPORT_SYMBOL_GPL(gfn_to_pfn_atomic); |
| 1242 | |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1243 | pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async, |
| 1244 | bool write_fault, bool *writable) |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 1245 | { |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1246 | return __gfn_to_pfn(kvm, gfn, false, async, write_fault, writable); |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 1247 | } |
| 1248 | EXPORT_SYMBOL_GPL(gfn_to_pfn_async); |
| 1249 | |
Xiao Guangrong | 365fb3f | 2010-08-28 19:24:13 +0800 | [diff] [blame] | 1250 | pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn) |
| 1251 | { |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1252 | return __gfn_to_pfn(kvm, gfn, false, NULL, true, NULL); |
Marcelo Tosatti | 506f0d6 | 2009-12-23 14:35:19 -0200 | [diff] [blame] | 1253 | } |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1254 | EXPORT_SYMBOL_GPL(gfn_to_pfn); |
| 1255 | |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1256 | pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault, |
| 1257 | bool *writable) |
| 1258 | { |
| 1259 | return __gfn_to_pfn(kvm, gfn, false, NULL, write_fault, writable); |
| 1260 | } |
| 1261 | EXPORT_SYMBOL_GPL(gfn_to_pfn_prot); |
| 1262 | |
Xiao Guangrong | d566104 | 2012-07-17 21:56:16 +0800 | [diff] [blame] | 1263 | pfn_t gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn) |
Marcelo Tosatti | 506f0d6 | 2009-12-23 14:35:19 -0200 | [diff] [blame] | 1264 | { |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1265 | return __gfn_to_pfn_memslot(slot, gfn, false, NULL, true, NULL); |
Marcelo Tosatti | 506f0d6 | 2009-12-23 14:35:19 -0200 | [diff] [blame] | 1266 | } |
| 1267 | |
Xiao Guangrong | 037d92d | 2012-08-21 10:59:12 +0800 | [diff] [blame] | 1268 | pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn) |
| 1269 | { |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1270 | return __gfn_to_pfn_memslot(slot, gfn, true, NULL, true, NULL); |
Xiao Guangrong | 037d92d | 2012-08-21 10:59:12 +0800 | [diff] [blame] | 1271 | } |
| 1272 | EXPORT_SYMBOL_GPL(gfn_to_pfn_memslot_atomic); |
| 1273 | |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 1274 | int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages, |
| 1275 | int nr_pages) |
| 1276 | { |
| 1277 | unsigned long addr; |
| 1278 | gfn_t entry; |
| 1279 | |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1280 | addr = gfn_to_hva_many(gfn_to_memslot(kvm, gfn), gfn, &entry); |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 1281 | if (kvm_is_error_hva(addr)) |
| 1282 | return -1; |
| 1283 | |
| 1284 | if (entry < nr_pages) |
| 1285 | return 0; |
| 1286 | |
| 1287 | return __get_user_pages_fast(addr, nr_pages, 1, pages); |
| 1288 | } |
| 1289 | EXPORT_SYMBOL_GPL(gfn_to_page_many_atomic); |
| 1290 | |
Xiao Guangrong | a276632 | 2012-07-26 11:58:59 +0800 | [diff] [blame] | 1291 | static struct page *kvm_pfn_to_page(pfn_t pfn) |
| 1292 | { |
Xiao Guangrong | cb9aaa3 | 2012-08-03 15:42:10 +0800 | [diff] [blame] | 1293 | if (is_error_pfn(pfn)) |
Xiao Guangrong | 6cede2e | 2012-08-03 15:41:22 +0800 | [diff] [blame] | 1294 | return KVM_ERR_PTR_BAD_PAGE; |
Xiao Guangrong | a276632 | 2012-07-26 11:58:59 +0800 | [diff] [blame] | 1295 | |
Xiao Guangrong | cb9aaa3 | 2012-08-03 15:42:10 +0800 | [diff] [blame] | 1296 | if (kvm_is_mmio_pfn(pfn)) { |
| 1297 | WARN_ON(1); |
| 1298 | return KVM_ERR_PTR_BAD_PAGE; |
| 1299 | } |
| 1300 | |
Xiao Guangrong | a276632 | 2012-07-26 11:58:59 +0800 | [diff] [blame] | 1301 | return pfn_to_page(pfn); |
| 1302 | } |
| 1303 | |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1304 | struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn) |
| 1305 | { |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1306 | pfn_t pfn; |
| 1307 | |
| 1308 | pfn = gfn_to_pfn(kvm, gfn); |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1309 | |
Xiao Guangrong | a276632 | 2012-07-26 11:58:59 +0800 | [diff] [blame] | 1310 | return kvm_pfn_to_page(pfn); |
Avi Kivity | 954bbbc | 2007-03-30 14:02:32 +0300 | [diff] [blame] | 1311 | } |
Anthony Liguori | aab61cc | 2007-10-29 15:15:20 -0500 | [diff] [blame] | 1312 | |
Avi Kivity | 954bbbc | 2007-03-30 14:02:32 +0300 | [diff] [blame] | 1313 | EXPORT_SYMBOL_GPL(gfn_to_page); |
| 1314 | |
Izik Eidus | b4231d6 | 2007-11-20 11:49:33 +0200 | [diff] [blame] | 1315 | void kvm_release_page_clean(struct page *page) |
| 1316 | { |
Xiao Guangrong | 32cad84 | 2012-08-03 15:42:52 +0800 | [diff] [blame] | 1317 | WARN_ON(is_error_page(page)); |
| 1318 | |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1319 | kvm_release_pfn_clean(page_to_pfn(page)); |
Izik Eidus | b4231d6 | 2007-11-20 11:49:33 +0200 | [diff] [blame] | 1320 | } |
| 1321 | EXPORT_SYMBOL_GPL(kvm_release_page_clean); |
| 1322 | |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1323 | void kvm_release_pfn_clean(pfn_t pfn) |
| 1324 | { |
Xiao Guangrong | cb9aaa3 | 2012-08-03 15:42:10 +0800 | [diff] [blame] | 1325 | WARN_ON(is_error_pfn(pfn)); |
| 1326 | |
Xiantao Zhang | c77fb9d | 2008-09-27 10:55:40 +0800 | [diff] [blame] | 1327 | if (!kvm_is_mmio_pfn(pfn)) |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1328 | put_page(pfn_to_page(pfn)); |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1329 | } |
| 1330 | EXPORT_SYMBOL_GPL(kvm_release_pfn_clean); |
| 1331 | |
Izik Eidus | b4231d6 | 2007-11-20 11:49:33 +0200 | [diff] [blame] | 1332 | void kvm_release_page_dirty(struct page *page) |
Izik Eidus | 8a7ae05 | 2007-10-18 11:09:33 +0200 | [diff] [blame] | 1333 | { |
Xiao Guangrong | a276632 | 2012-07-26 11:58:59 +0800 | [diff] [blame] | 1334 | WARN_ON(is_error_page(page)); |
| 1335 | |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1336 | kvm_release_pfn_dirty(page_to_pfn(page)); |
Izik Eidus | 8a7ae05 | 2007-10-18 11:09:33 +0200 | [diff] [blame] | 1337 | } |
Izik Eidus | b4231d6 | 2007-11-20 11:49:33 +0200 | [diff] [blame] | 1338 | EXPORT_SYMBOL_GPL(kvm_release_page_dirty); |
Izik Eidus | 8a7ae05 | 2007-10-18 11:09:33 +0200 | [diff] [blame] | 1339 | |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1340 | void kvm_release_pfn_dirty(pfn_t pfn) |
| 1341 | { |
| 1342 | kvm_set_pfn_dirty(pfn); |
| 1343 | kvm_release_pfn_clean(pfn); |
| 1344 | } |
| 1345 | EXPORT_SYMBOL_GPL(kvm_release_pfn_dirty); |
| 1346 | |
| 1347 | void kvm_set_page_dirty(struct page *page) |
| 1348 | { |
| 1349 | kvm_set_pfn_dirty(page_to_pfn(page)); |
| 1350 | } |
| 1351 | EXPORT_SYMBOL_GPL(kvm_set_page_dirty); |
| 1352 | |
| 1353 | void kvm_set_pfn_dirty(pfn_t pfn) |
| 1354 | { |
Xiantao Zhang | c77fb9d | 2008-09-27 10:55:40 +0800 | [diff] [blame] | 1355 | if (!kvm_is_mmio_pfn(pfn)) { |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1356 | struct page *page = pfn_to_page(pfn); |
| 1357 | if (!PageReserved(page)) |
| 1358 | SetPageDirty(page); |
| 1359 | } |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1360 | } |
| 1361 | EXPORT_SYMBOL_GPL(kvm_set_pfn_dirty); |
| 1362 | |
| 1363 | void kvm_set_pfn_accessed(pfn_t pfn) |
| 1364 | { |
Xiantao Zhang | c77fb9d | 2008-09-27 10:55:40 +0800 | [diff] [blame] | 1365 | if (!kvm_is_mmio_pfn(pfn)) |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1366 | mark_page_accessed(pfn_to_page(pfn)); |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1367 | } |
| 1368 | EXPORT_SYMBOL_GPL(kvm_set_pfn_accessed); |
| 1369 | |
| 1370 | void kvm_get_pfn(pfn_t pfn) |
| 1371 | { |
Xiantao Zhang | c77fb9d | 2008-09-27 10:55:40 +0800 | [diff] [blame] | 1372 | if (!kvm_is_mmio_pfn(pfn)) |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1373 | get_page(pfn_to_page(pfn)); |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1374 | } |
| 1375 | EXPORT_SYMBOL_GPL(kvm_get_pfn); |
| 1376 | |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1377 | static int next_segment(unsigned long len, int offset) |
| 1378 | { |
| 1379 | if (len > PAGE_SIZE - offset) |
| 1380 | return PAGE_SIZE - offset; |
| 1381 | else |
| 1382 | return len; |
| 1383 | } |
| 1384 | |
| 1385 | int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, |
| 1386 | int len) |
| 1387 | { |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1388 | int r; |
| 1389 | unsigned long addr; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1390 | |
Xiao Guangrong | 86ab8cf | 2012-08-21 10:59:53 +0800 | [diff] [blame] | 1391 | addr = gfn_to_hva_read(kvm, gfn); |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1392 | if (kvm_is_error_hva(addr)) |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1393 | return -EFAULT; |
Xiao Guangrong | 86ab8cf | 2012-08-21 10:59:53 +0800 | [diff] [blame] | 1394 | r = kvm_read_hva(data, (void __user *)addr + offset, len); |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1395 | if (r) |
| 1396 | return -EFAULT; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1397 | return 0; |
| 1398 | } |
| 1399 | EXPORT_SYMBOL_GPL(kvm_read_guest_page); |
| 1400 | |
| 1401 | int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len) |
| 1402 | { |
| 1403 | gfn_t gfn = gpa >> PAGE_SHIFT; |
| 1404 | int seg; |
| 1405 | int offset = offset_in_page(gpa); |
| 1406 | int ret; |
| 1407 | |
| 1408 | while ((seg = next_segment(len, offset)) != 0) { |
| 1409 | ret = kvm_read_guest_page(kvm, gfn, data, offset, seg); |
| 1410 | if (ret < 0) |
| 1411 | return ret; |
| 1412 | offset = 0; |
| 1413 | len -= seg; |
| 1414 | data += seg; |
| 1415 | ++gfn; |
| 1416 | } |
| 1417 | return 0; |
| 1418 | } |
| 1419 | EXPORT_SYMBOL_GPL(kvm_read_guest); |
| 1420 | |
Marcelo Tosatti | 7ec5458 | 2007-12-20 19:18:23 -0500 | [diff] [blame] | 1421 | int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, |
| 1422 | unsigned long len) |
| 1423 | { |
| 1424 | int r; |
| 1425 | unsigned long addr; |
| 1426 | gfn_t gfn = gpa >> PAGE_SHIFT; |
| 1427 | int offset = offset_in_page(gpa); |
| 1428 | |
Xiao Guangrong | 86ab8cf | 2012-08-21 10:59:53 +0800 | [diff] [blame] | 1429 | addr = gfn_to_hva_read(kvm, gfn); |
Marcelo Tosatti | 7ec5458 | 2007-12-20 19:18:23 -0500 | [diff] [blame] | 1430 | if (kvm_is_error_hva(addr)) |
| 1431 | return -EFAULT; |
Andrea Arcangeli | 0aac03f | 2008-01-30 19:57:35 +0100 | [diff] [blame] | 1432 | pagefault_disable(); |
Xiao Guangrong | 86ab8cf | 2012-08-21 10:59:53 +0800 | [diff] [blame] | 1433 | r = kvm_read_hva_atomic(data, (void __user *)addr + offset, len); |
Andrea Arcangeli | 0aac03f | 2008-01-30 19:57:35 +0100 | [diff] [blame] | 1434 | pagefault_enable(); |
Marcelo Tosatti | 7ec5458 | 2007-12-20 19:18:23 -0500 | [diff] [blame] | 1435 | if (r) |
| 1436 | return -EFAULT; |
| 1437 | return 0; |
| 1438 | } |
| 1439 | EXPORT_SYMBOL(kvm_read_guest_atomic); |
| 1440 | |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1441 | int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, |
| 1442 | int offset, int len) |
| 1443 | { |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1444 | int r; |
| 1445 | unsigned long addr; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1446 | |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1447 | addr = gfn_to_hva(kvm, gfn); |
| 1448 | if (kvm_is_error_hva(addr)) |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1449 | return -EFAULT; |
Xiao Guangrong | 8b0cedf | 2011-05-15 23:22:04 +0800 | [diff] [blame] | 1450 | r = __copy_to_user((void __user *)addr + offset, data, len); |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1451 | if (r) |
| 1452 | return -EFAULT; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1453 | mark_page_dirty(kvm, gfn); |
| 1454 | return 0; |
| 1455 | } |
| 1456 | EXPORT_SYMBOL_GPL(kvm_write_guest_page); |
| 1457 | |
| 1458 | int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, |
| 1459 | unsigned long len) |
| 1460 | { |
| 1461 | gfn_t gfn = gpa >> PAGE_SHIFT; |
| 1462 | int seg; |
| 1463 | int offset = offset_in_page(gpa); |
| 1464 | int ret; |
| 1465 | |
| 1466 | while ((seg = next_segment(len, offset)) != 0) { |
| 1467 | ret = kvm_write_guest_page(kvm, gfn, data, offset, seg); |
| 1468 | if (ret < 0) |
| 1469 | return ret; |
| 1470 | offset = 0; |
| 1471 | len -= seg; |
| 1472 | data += seg; |
| 1473 | ++gfn; |
| 1474 | } |
| 1475 | return 0; |
| 1476 | } |
| 1477 | |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1478 | int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc, |
| 1479 | gpa_t gpa) |
| 1480 | { |
| 1481 | struct kvm_memslots *slots = kvm_memslots(kvm); |
| 1482 | int offset = offset_in_page(gpa); |
| 1483 | gfn_t gfn = gpa >> PAGE_SHIFT; |
| 1484 | |
| 1485 | ghc->gpa = gpa; |
| 1486 | ghc->generation = slots->generation; |
Paul Mackerras | 9d4cba7 | 2012-01-12 20:09:51 +0000 | [diff] [blame] | 1487 | ghc->memslot = gfn_to_memslot(kvm, gfn); |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1488 | ghc->hva = gfn_to_hva_many(ghc->memslot, gfn, NULL); |
| 1489 | if (!kvm_is_error_hva(ghc->hva)) |
| 1490 | ghc->hva += offset; |
| 1491 | else |
| 1492 | return -EFAULT; |
| 1493 | |
| 1494 | return 0; |
| 1495 | } |
| 1496 | EXPORT_SYMBOL_GPL(kvm_gfn_to_hva_cache_init); |
| 1497 | |
| 1498 | int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, |
| 1499 | void *data, unsigned long len) |
| 1500 | { |
| 1501 | struct kvm_memslots *slots = kvm_memslots(kvm); |
| 1502 | int r; |
| 1503 | |
| 1504 | if (slots->generation != ghc->generation) |
| 1505 | kvm_gfn_to_hva_cache_init(kvm, ghc, ghc->gpa); |
| 1506 | |
| 1507 | if (kvm_is_error_hva(ghc->hva)) |
| 1508 | return -EFAULT; |
| 1509 | |
Xiao Guangrong | 8b0cedf | 2011-05-15 23:22:04 +0800 | [diff] [blame] | 1510 | r = __copy_to_user((void __user *)ghc->hva, data, len); |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1511 | if (r) |
| 1512 | return -EFAULT; |
| 1513 | mark_page_dirty_in_slot(kvm, ghc->memslot, ghc->gpa >> PAGE_SHIFT); |
| 1514 | |
| 1515 | return 0; |
| 1516 | } |
| 1517 | EXPORT_SYMBOL_GPL(kvm_write_guest_cached); |
| 1518 | |
Gleb Natapov | e03b644 | 2011-07-11 15:28:11 -0400 | [diff] [blame] | 1519 | int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, |
| 1520 | void *data, unsigned long len) |
| 1521 | { |
| 1522 | struct kvm_memslots *slots = kvm_memslots(kvm); |
| 1523 | int r; |
| 1524 | |
| 1525 | if (slots->generation != ghc->generation) |
| 1526 | kvm_gfn_to_hva_cache_init(kvm, ghc, ghc->gpa); |
| 1527 | |
| 1528 | if (kvm_is_error_hva(ghc->hva)) |
| 1529 | return -EFAULT; |
| 1530 | |
| 1531 | r = __copy_from_user(data, (void __user *)ghc->hva, len); |
| 1532 | if (r) |
| 1533 | return -EFAULT; |
| 1534 | |
| 1535 | return 0; |
| 1536 | } |
| 1537 | EXPORT_SYMBOL_GPL(kvm_read_guest_cached); |
| 1538 | |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1539 | int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len) |
| 1540 | { |
Heiko Carstens | 3bcc8a8 | 2010-10-27 17:21:21 +0200 | [diff] [blame] | 1541 | return kvm_write_guest_page(kvm, gfn, (const void *) empty_zero_page, |
| 1542 | offset, len); |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1543 | } |
| 1544 | EXPORT_SYMBOL_GPL(kvm_clear_guest_page); |
| 1545 | |
| 1546 | int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len) |
| 1547 | { |
| 1548 | gfn_t gfn = gpa >> PAGE_SHIFT; |
| 1549 | int seg; |
| 1550 | int offset = offset_in_page(gpa); |
| 1551 | int ret; |
| 1552 | |
| 1553 | while ((seg = next_segment(len, offset)) != 0) { |
| 1554 | ret = kvm_clear_guest_page(kvm, gfn, offset, seg); |
| 1555 | if (ret < 0) |
| 1556 | return ret; |
| 1557 | offset = 0; |
| 1558 | len -= seg; |
| 1559 | ++gfn; |
| 1560 | } |
| 1561 | return 0; |
| 1562 | } |
| 1563 | EXPORT_SYMBOL_GPL(kvm_clear_guest); |
| 1564 | |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1565 | void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot, |
| 1566 | gfn_t gfn) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1567 | { |
Rusty Russell | 7e9d619 | 2007-07-31 20:41:14 +1000 | [diff] [blame] | 1568 | if (memslot && memslot->dirty_bitmap) { |
| 1569 | unsigned long rel_gfn = gfn - memslot->base_gfn; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1570 | |
Takuya Yoshikawa | 93474b2 | 2012-03-01 19:34:45 +0900 | [diff] [blame] | 1571 | /* TODO: introduce set_bit_le() and use it */ |
| 1572 | test_and_set_bit_le(rel_gfn, memslot->dirty_bitmap); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1573 | } |
| 1574 | } |
| 1575 | |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1576 | void mark_page_dirty(struct kvm *kvm, gfn_t gfn) |
| 1577 | { |
| 1578 | struct kvm_memory_slot *memslot; |
| 1579 | |
| 1580 | memslot = gfn_to_memslot(kvm, gfn); |
| 1581 | mark_page_dirty_in_slot(kvm, memslot, gfn); |
| 1582 | } |
| 1583 | |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1584 | /* |
| 1585 | * The vCPU has executed a HLT instruction with in-kernel mode enabled. |
| 1586 | */ |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 1587 | void kvm_vcpu_block(struct kvm_vcpu *vcpu) |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1588 | { |
Marcelo Tosatti | e5c239c | 2008-05-08 19:47:01 -0300 | [diff] [blame] | 1589 | DEFINE_WAIT(wait); |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1590 | |
Marcelo Tosatti | e5c239c | 2008-05-08 19:47:01 -0300 | [diff] [blame] | 1591 | for (;;) { |
| 1592 | prepare_to_wait(&vcpu->wq, &wait, TASK_INTERRUPTIBLE); |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1593 | |
Gleb Natapov | a1b3710 | 2009-07-09 15:33:52 +0300 | [diff] [blame] | 1594 | if (kvm_arch_vcpu_runnable(vcpu)) { |
Avi Kivity | a8eeb04 | 2010-05-10 12:34:53 +0300 | [diff] [blame] | 1595 | kvm_make_request(KVM_REQ_UNHALT, vcpu); |
Marcelo Tosatti | e5c239c | 2008-05-08 19:47:01 -0300 | [diff] [blame] | 1596 | break; |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 1597 | } |
Gleb Natapov | 09cec75 | 2009-03-23 15:11:44 +0200 | [diff] [blame] | 1598 | if (kvm_cpu_has_pending_timer(vcpu)) |
| 1599 | break; |
Marcelo Tosatti | e5c239c | 2008-05-08 19:47:01 -0300 | [diff] [blame] | 1600 | if (signal_pending(current)) |
| 1601 | break; |
| 1602 | |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1603 | schedule(); |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1604 | } |
| 1605 | |
Marcelo Tosatti | e5c239c | 2008-05-08 19:47:01 -0300 | [diff] [blame] | 1606 | finish_wait(&vcpu->wq, &wait); |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1607 | } |
| 1608 | |
Marcelo Tosatti | 8c84780 | 2012-03-14 17:58:48 -0300 | [diff] [blame] | 1609 | #ifndef CONFIG_S390 |
Christoffer Dall | b6d3383 | 2012-03-08 16:44:24 -0500 | [diff] [blame] | 1610 | /* |
| 1611 | * Kick a sleeping VCPU, or a guest VCPU in guest mode, into host kernel mode. |
| 1612 | */ |
| 1613 | void kvm_vcpu_kick(struct kvm_vcpu *vcpu) |
| 1614 | { |
| 1615 | int me; |
| 1616 | int cpu = vcpu->cpu; |
| 1617 | wait_queue_head_t *wqp; |
| 1618 | |
| 1619 | wqp = kvm_arch_vcpu_wq(vcpu); |
| 1620 | if (waitqueue_active(wqp)) { |
| 1621 | wake_up_interruptible(wqp); |
| 1622 | ++vcpu->stat.halt_wakeup; |
| 1623 | } |
| 1624 | |
| 1625 | me = get_cpu(); |
| 1626 | if (cpu != me && (unsigned)cpu < nr_cpu_ids && cpu_online(cpu)) |
| 1627 | if (kvm_arch_vcpu_should_kick(vcpu)) |
| 1628 | smp_send_reschedule(cpu); |
| 1629 | put_cpu(); |
| 1630 | } |
Marcelo Tosatti | 8c84780 | 2012-03-14 17:58:48 -0300 | [diff] [blame] | 1631 | #endif /* !CONFIG_S390 */ |
Christoffer Dall | b6d3383 | 2012-03-08 16:44:24 -0500 | [diff] [blame] | 1632 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1633 | void kvm_resched(struct kvm_vcpu *vcpu) |
| 1634 | { |
Yaozu Dong | 3fca036 | 2007-04-25 16:49:19 +0300 | [diff] [blame] | 1635 | if (!need_resched()) |
| 1636 | return; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1637 | cond_resched(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1638 | } |
| 1639 | EXPORT_SYMBOL_GPL(kvm_resched); |
| 1640 | |
Konstantin Weitz | 41628d3 | 2012-04-25 15:30:38 +0200 | [diff] [blame] | 1641 | bool kvm_vcpu_yield_to(struct kvm_vcpu *target) |
| 1642 | { |
| 1643 | struct pid *pid; |
| 1644 | struct task_struct *task = NULL; |
| 1645 | |
| 1646 | rcu_read_lock(); |
| 1647 | pid = rcu_dereference(target->pid); |
| 1648 | if (pid) |
| 1649 | task = get_pid_task(target->pid, PIDTYPE_PID); |
| 1650 | rcu_read_unlock(); |
| 1651 | if (!task) |
| 1652 | return false; |
| 1653 | if (task->flags & PF_VCPU) { |
| 1654 | put_task_struct(task); |
| 1655 | return false; |
| 1656 | } |
| 1657 | if (yield_to(task, 1)) { |
| 1658 | put_task_struct(task); |
| 1659 | return true; |
| 1660 | } |
| 1661 | put_task_struct(task); |
| 1662 | return false; |
| 1663 | } |
| 1664 | EXPORT_SYMBOL_GPL(kvm_vcpu_yield_to); |
| 1665 | |
Raghavendra K T | 06e48c5 | 2012-07-19 15:17:52 +0530 | [diff] [blame] | 1666 | #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT |
| 1667 | /* |
| 1668 | * Helper that checks whether a VCPU is eligible for directed yield. |
| 1669 | * Most eligible candidate to yield is decided by following heuristics: |
| 1670 | * |
| 1671 | * (a) VCPU which has not done pl-exit or cpu relax intercepted recently |
| 1672 | * (preempted lock holder), indicated by @in_spin_loop. |
| 1673 | * Set at the beiginning and cleared at the end of interception/PLE handler. |
| 1674 | * |
| 1675 | * (b) VCPU which has done pl-exit/ cpu relax intercepted but did not get |
| 1676 | * chance last time (mostly it has become eligible now since we have probably |
| 1677 | * yielded to lockholder in last iteration. This is done by toggling |
| 1678 | * @dy_eligible each time a VCPU checked for eligibility.) |
| 1679 | * |
| 1680 | * Yielding to a recently pl-exited/cpu relax intercepted VCPU before yielding |
| 1681 | * to preempted lock-holder could result in wrong VCPU selection and CPU |
| 1682 | * burning. Giving priority for a potential lock-holder increases lock |
| 1683 | * progress. |
| 1684 | * |
| 1685 | * Since algorithm is based on heuristics, accessing another VCPU data without |
| 1686 | * locking does not harm. It may result in trying to yield to same VCPU, fail |
| 1687 | * and continue with next VCPU and so on. |
| 1688 | */ |
| 1689 | bool kvm_vcpu_eligible_for_directed_yield(struct kvm_vcpu *vcpu) |
| 1690 | { |
| 1691 | bool eligible; |
| 1692 | |
| 1693 | eligible = !vcpu->spin_loop.in_spin_loop || |
| 1694 | (vcpu->spin_loop.in_spin_loop && |
| 1695 | vcpu->spin_loop.dy_eligible); |
| 1696 | |
| 1697 | if (vcpu->spin_loop.in_spin_loop) |
| 1698 | kvm_vcpu_set_dy_eligible(vcpu, !vcpu->spin_loop.dy_eligible); |
| 1699 | |
| 1700 | return eligible; |
| 1701 | } |
| 1702 | #endif |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 1703 | void kvm_vcpu_on_spin(struct kvm_vcpu *me) |
Zhai, Edwin | d255f4f | 2009-10-09 18:03:20 +0800 | [diff] [blame] | 1704 | { |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 1705 | struct kvm *kvm = me->kvm; |
| 1706 | struct kvm_vcpu *vcpu; |
| 1707 | int last_boosted_vcpu = me->kvm->last_boosted_vcpu; |
| 1708 | int yielded = 0; |
| 1709 | int pass; |
| 1710 | int i; |
Zhai, Edwin | d255f4f | 2009-10-09 18:03:20 +0800 | [diff] [blame] | 1711 | |
Raghavendra K T | 4c08849 | 2012-07-18 19:07:46 +0530 | [diff] [blame] | 1712 | kvm_vcpu_set_in_spin_loop(me, true); |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 1713 | /* |
| 1714 | * We boost the priority of a VCPU that is runnable but not |
| 1715 | * currently running, because it got preempted by something |
| 1716 | * else and called schedule in __vcpu_run. Hopefully that |
| 1717 | * VCPU is holding the lock that we need and will release it. |
| 1718 | * We approximate round-robin by starting at the last boosted VCPU. |
| 1719 | */ |
| 1720 | for (pass = 0; pass < 2 && !yielded; pass++) { |
| 1721 | kvm_for_each_vcpu(i, vcpu, kvm) { |
Rik van Riel | 5cfc2aa | 2012-06-19 16:51:04 -0400 | [diff] [blame] | 1722 | if (!pass && i <= last_boosted_vcpu) { |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 1723 | i = last_boosted_vcpu; |
| 1724 | continue; |
| 1725 | } else if (pass && i > last_boosted_vcpu) |
| 1726 | break; |
| 1727 | if (vcpu == me) |
| 1728 | continue; |
| 1729 | if (waitqueue_active(&vcpu->wq)) |
| 1730 | continue; |
Raghavendra K T | 06e48c5 | 2012-07-19 15:17:52 +0530 | [diff] [blame] | 1731 | if (!kvm_vcpu_eligible_for_directed_yield(vcpu)) |
| 1732 | continue; |
Konstantin Weitz | 41628d3 | 2012-04-25 15:30:38 +0200 | [diff] [blame] | 1733 | if (kvm_vcpu_yield_to(vcpu)) { |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 1734 | kvm->last_boosted_vcpu = i; |
| 1735 | yielded = 1; |
| 1736 | break; |
| 1737 | } |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 1738 | } |
| 1739 | } |
Raghavendra K T | 4c08849 | 2012-07-18 19:07:46 +0530 | [diff] [blame] | 1740 | kvm_vcpu_set_in_spin_loop(me, false); |
Raghavendra K T | 06e48c5 | 2012-07-19 15:17:52 +0530 | [diff] [blame] | 1741 | |
| 1742 | /* Ensure vcpu is not eligible during next spinloop */ |
| 1743 | kvm_vcpu_set_dy_eligible(me, false); |
Zhai, Edwin | d255f4f | 2009-10-09 18:03:20 +0800 | [diff] [blame] | 1744 | } |
| 1745 | EXPORT_SYMBOL_GPL(kvm_vcpu_on_spin); |
| 1746 | |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 1747 | 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] | 1748 | { |
| 1749 | struct kvm_vcpu *vcpu = vma->vm_file->private_data; |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 1750 | struct page *page; |
| 1751 | |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 1752 | if (vmf->pgoff == 0) |
Avi Kivity | 039576c | 2007-03-20 12:46:50 +0200 | [diff] [blame] | 1753 | page = virt_to_page(vcpu->run); |
Avi Kivity | 0956676 | 2008-01-23 18:14:23 +0200 | [diff] [blame] | 1754 | #ifdef CONFIG_X86 |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 1755 | else if (vmf->pgoff == KVM_PIO_PAGE_OFFSET) |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1756 | page = virt_to_page(vcpu->arch.pio_data); |
Avi Kivity | 0956676 | 2008-01-23 18:14:23 +0200 | [diff] [blame] | 1757 | #endif |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 1758 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
| 1759 | else if (vmf->pgoff == KVM_COALESCED_MMIO_PAGE_OFFSET) |
| 1760 | page = virt_to_page(vcpu->kvm->coalesced_mmio_ring); |
| 1761 | #endif |
Avi Kivity | 039576c | 2007-03-20 12:46:50 +0200 | [diff] [blame] | 1762 | else |
Carsten Otte | 5b1c149 | 2012-01-04 10:25:23 +0100 | [diff] [blame] | 1763 | return kvm_arch_vcpu_fault(vcpu, vmf); |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 1764 | get_page(page); |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 1765 | vmf->page = page; |
| 1766 | return 0; |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 1767 | } |
| 1768 | |
Alexey Dobriyan | f0f37e2 | 2009-09-27 22:29:37 +0400 | [diff] [blame] | 1769 | static const struct vm_operations_struct kvm_vcpu_vm_ops = { |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 1770 | .fault = kvm_vcpu_fault, |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 1771 | }; |
| 1772 | |
| 1773 | static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma) |
| 1774 | { |
| 1775 | vma->vm_ops = &kvm_vcpu_vm_ops; |
| 1776 | return 0; |
| 1777 | } |
| 1778 | |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1779 | static int kvm_vcpu_release(struct inode *inode, struct file *filp) |
| 1780 | { |
| 1781 | struct kvm_vcpu *vcpu = filp->private_data; |
| 1782 | |
Al Viro | 66c0b39 | 2008-04-19 20:33:56 +0100 | [diff] [blame] | 1783 | kvm_put_kvm(vcpu->kvm); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1784 | return 0; |
| 1785 | } |
| 1786 | |
Christian Borntraeger | 3d3aab1 | 2008-12-02 11:17:32 +0100 | [diff] [blame] | 1787 | static struct file_operations kvm_vcpu_fops = { |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1788 | .release = kvm_vcpu_release, |
| 1789 | .unlocked_ioctl = kvm_vcpu_ioctl, |
Alexander Graf | 1dda606 | 2011-06-08 02:45:37 +0200 | [diff] [blame] | 1790 | #ifdef CONFIG_COMPAT |
| 1791 | .compat_ioctl = kvm_vcpu_compat_ioctl, |
| 1792 | #endif |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 1793 | .mmap = kvm_vcpu_mmap, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 1794 | .llseek = noop_llseek, |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1795 | }; |
| 1796 | |
| 1797 | /* |
| 1798 | * Allocates an inode for the vcpu. |
| 1799 | */ |
| 1800 | static int create_vcpu_fd(struct kvm_vcpu *vcpu) |
| 1801 | { |
Roland Dreier | 628ff7c | 2009-12-18 09:41:24 -0800 | [diff] [blame] | 1802 | return anon_inode_getfd("kvm-vcpu", &kvm_vcpu_fops, vcpu, O_RDWR); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1803 | } |
| 1804 | |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 1805 | /* |
| 1806 | * Creates some virtual cpus. Good luck creating more than one. |
| 1807 | */ |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 1808 | static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, u32 id) |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 1809 | { |
| 1810 | int r; |
Gleb Natapov | 988a2ca | 2009-06-09 15:56:29 +0300 | [diff] [blame] | 1811 | struct kvm_vcpu *vcpu, *v; |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 1812 | |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 1813 | vcpu = kvm_arch_vcpu_create(kvm, id); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 1814 | if (IS_ERR(vcpu)) |
| 1815 | return PTR_ERR(vcpu); |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 1816 | |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 1817 | preempt_notifier_init(&vcpu->preempt_notifier, &kvm_preempt_ops); |
| 1818 | |
Avi Kivity | 26e5215 | 2007-11-20 15:30:24 +0200 | [diff] [blame] | 1819 | r = kvm_arch_vcpu_setup(vcpu); |
| 1820 | if (r) |
Jan Kiszka | d780592 | 2011-05-23 10:33:05 +0200 | [diff] [blame] | 1821 | goto vcpu_destroy; |
Avi Kivity | 26e5215 | 2007-11-20 15:30:24 +0200 | [diff] [blame] | 1822 | |
Shaohua Li | 11ec280 | 2007-07-23 14:51:37 +0800 | [diff] [blame] | 1823 | mutex_lock(&kvm->lock); |
Avi Kivity | 3e51570 | 2012-03-05 14:23:29 +0200 | [diff] [blame] | 1824 | if (!kvm_vcpu_compatible(vcpu)) { |
| 1825 | r = -EINVAL; |
| 1826 | goto unlock_vcpu_destroy; |
| 1827 | } |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 1828 | if (atomic_read(&kvm->online_vcpus) == KVM_MAX_VCPUS) { |
| 1829 | r = -EINVAL; |
Jan Kiszka | d780592 | 2011-05-23 10:33:05 +0200 | [diff] [blame] | 1830 | goto unlock_vcpu_destroy; |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 1831 | } |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 1832 | |
Gleb Natapov | 988a2ca | 2009-06-09 15:56:29 +0300 | [diff] [blame] | 1833 | kvm_for_each_vcpu(r, v, kvm) |
| 1834 | if (v->vcpu_id == id) { |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 1835 | r = -EEXIST; |
Jan Kiszka | d780592 | 2011-05-23 10:33:05 +0200 | [diff] [blame] | 1836 | goto unlock_vcpu_destroy; |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 1837 | } |
| 1838 | |
| 1839 | BUG_ON(kvm->vcpus[atomic_read(&kvm->online_vcpus)]); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 1840 | |
| 1841 | /* Now it's all set up, let userspace reach it */ |
Al Viro | 66c0b39 | 2008-04-19 20:33:56 +0100 | [diff] [blame] | 1842 | kvm_get_kvm(kvm); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1843 | r = create_vcpu_fd(vcpu); |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 1844 | if (r < 0) { |
| 1845 | kvm_put_kvm(kvm); |
Jan Kiszka | d780592 | 2011-05-23 10:33:05 +0200 | [diff] [blame] | 1846 | goto unlock_vcpu_destroy; |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 1847 | } |
| 1848 | |
| 1849 | kvm->vcpus[atomic_read(&kvm->online_vcpus)] = vcpu; |
| 1850 | smp_wmb(); |
| 1851 | atomic_inc(&kvm->online_vcpus); |
| 1852 | |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 1853 | mutex_unlock(&kvm->lock); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1854 | return r; |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 1855 | |
Jan Kiszka | d780592 | 2011-05-23 10:33:05 +0200 | [diff] [blame] | 1856 | unlock_vcpu_destroy: |
Glauber Costa | 7d8fece | 2008-09-17 23:16:59 -0300 | [diff] [blame] | 1857 | mutex_unlock(&kvm->lock); |
Jan Kiszka | d780592 | 2011-05-23 10:33:05 +0200 | [diff] [blame] | 1858 | vcpu_destroy: |
Hollis Blanchard | d40ccc6 | 2007-11-19 14:04:43 -0600 | [diff] [blame] | 1859 | kvm_arch_vcpu_destroy(vcpu); |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 1860 | return r; |
| 1861 | } |
| 1862 | |
Avi Kivity | 1961d27 | 2007-03-05 19:46:05 +0200 | [diff] [blame] | 1863 | static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset) |
| 1864 | { |
| 1865 | if (sigset) { |
| 1866 | sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP)); |
| 1867 | vcpu->sigset_active = 1; |
| 1868 | vcpu->sigset = *sigset; |
| 1869 | } else |
| 1870 | vcpu->sigset_active = 0; |
| 1871 | return 0; |
| 1872 | } |
| 1873 | |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1874 | static long kvm_vcpu_ioctl(struct file *filp, |
| 1875 | unsigned int ioctl, unsigned long arg) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1876 | { |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1877 | struct kvm_vcpu *vcpu = filp->private_data; |
Al Viro | 2f366987 | 2007-02-09 16:38:35 +0000 | [diff] [blame] | 1878 | void __user *argp = (void __user *)arg; |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1879 | int r; |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 1880 | struct kvm_fpu *fpu = NULL; |
| 1881 | struct kvm_sregs *kvm_sregs = NULL; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1882 | |
Avi Kivity | 6d4e4c4 | 2007-11-21 16:41:05 +0200 | [diff] [blame] | 1883 | if (vcpu->kvm->mm != current->mm) |
| 1884 | return -EIO; |
Avi Kivity | 2122ff5 | 2010-05-13 11:25:04 +0300 | [diff] [blame] | 1885 | |
| 1886 | #if defined(CONFIG_S390) || defined(CONFIG_PPC) |
| 1887 | /* |
| 1888 | * Special cases: vcpu ioctls that are asynchronous to vcpu execution, |
| 1889 | * so vcpu_load() would break it. |
| 1890 | */ |
| 1891 | if (ioctl == KVM_S390_INTERRUPT || ioctl == KVM_INTERRUPT) |
| 1892 | return kvm_arch_vcpu_ioctl(filp, ioctl, arg); |
| 1893 | #endif |
| 1894 | |
| 1895 | |
Michael S. Tsirkin | 9fc7744 | 2012-09-16 11:50:30 +0300 | [diff] [blame] | 1896 | r = vcpu_load(vcpu); |
| 1897 | if (r) |
| 1898 | return r; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1899 | switch (ioctl) { |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 1900 | case KVM_RUN: |
Avi Kivity | f0fe510 | 2007-03-07 13:11:17 +0200 | [diff] [blame] | 1901 | r = -EINVAL; |
| 1902 | if (arg) |
| 1903 | goto out; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 1904 | r = kvm_arch_vcpu_ioctl_run(vcpu, vcpu->run); |
Gleb Natapov | 64be500 | 2010-10-24 16:49:08 +0200 | [diff] [blame] | 1905 | trace_kvm_userspace_exit(vcpu->run->exit_reason, r); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1906 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1907 | case KVM_GET_REGS: { |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1908 | struct kvm_regs *kvm_regs; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1909 | |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1910 | r = -ENOMEM; |
| 1911 | kvm_regs = kzalloc(sizeof(struct kvm_regs), GFP_KERNEL); |
| 1912 | if (!kvm_regs) |
| 1913 | goto out; |
| 1914 | r = kvm_arch_vcpu_ioctl_get_regs(vcpu, kvm_regs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1915 | if (r) |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1916 | goto out_free1; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1917 | r = -EFAULT; |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1918 | if (copy_to_user(argp, kvm_regs, sizeof(struct kvm_regs))) |
| 1919 | goto out_free1; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1920 | r = 0; |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1921 | out_free1: |
| 1922 | kfree(kvm_regs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1923 | break; |
| 1924 | } |
| 1925 | case KVM_SET_REGS: { |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1926 | struct kvm_regs *kvm_regs; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1927 | |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1928 | r = -ENOMEM; |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 1929 | kvm_regs = memdup_user(argp, sizeof(*kvm_regs)); |
| 1930 | if (IS_ERR(kvm_regs)) { |
| 1931 | r = PTR_ERR(kvm_regs); |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1932 | goto out; |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 1933 | } |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1934 | r = kvm_arch_vcpu_ioctl_set_regs(vcpu, kvm_regs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1935 | if (r) |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1936 | goto out_free2; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1937 | r = 0; |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1938 | out_free2: |
| 1939 | kfree(kvm_regs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1940 | break; |
| 1941 | } |
| 1942 | case KVM_GET_SREGS: { |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 1943 | kvm_sregs = kzalloc(sizeof(struct kvm_sregs), GFP_KERNEL); |
| 1944 | r = -ENOMEM; |
| 1945 | if (!kvm_sregs) |
| 1946 | goto out; |
| 1947 | r = kvm_arch_vcpu_ioctl_get_sregs(vcpu, kvm_sregs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1948 | if (r) |
| 1949 | goto out; |
| 1950 | r = -EFAULT; |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 1951 | if (copy_to_user(argp, kvm_sregs, sizeof(struct kvm_sregs))) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1952 | goto out; |
| 1953 | r = 0; |
| 1954 | break; |
| 1955 | } |
| 1956 | case KVM_SET_SREGS: { |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 1957 | kvm_sregs = memdup_user(argp, sizeof(*kvm_sregs)); |
| 1958 | if (IS_ERR(kvm_sregs)) { |
| 1959 | r = PTR_ERR(kvm_sregs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1960 | goto out; |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 1961 | } |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 1962 | r = kvm_arch_vcpu_ioctl_set_sregs(vcpu, kvm_sregs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1963 | if (r) |
| 1964 | goto out; |
| 1965 | r = 0; |
| 1966 | break; |
| 1967 | } |
Marcelo Tosatti | 62d9f0d | 2008-04-11 13:24:45 -0300 | [diff] [blame] | 1968 | case KVM_GET_MP_STATE: { |
| 1969 | struct kvm_mp_state mp_state; |
| 1970 | |
| 1971 | r = kvm_arch_vcpu_ioctl_get_mpstate(vcpu, &mp_state); |
| 1972 | if (r) |
| 1973 | goto out; |
| 1974 | r = -EFAULT; |
| 1975 | if (copy_to_user(argp, &mp_state, sizeof mp_state)) |
| 1976 | goto out; |
| 1977 | r = 0; |
| 1978 | break; |
| 1979 | } |
| 1980 | case KVM_SET_MP_STATE: { |
| 1981 | struct kvm_mp_state mp_state; |
| 1982 | |
| 1983 | r = -EFAULT; |
| 1984 | if (copy_from_user(&mp_state, argp, sizeof mp_state)) |
| 1985 | goto out; |
| 1986 | r = kvm_arch_vcpu_ioctl_set_mpstate(vcpu, &mp_state); |
| 1987 | if (r) |
| 1988 | goto out; |
| 1989 | r = 0; |
| 1990 | break; |
| 1991 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1992 | case KVM_TRANSLATE: { |
| 1993 | struct kvm_translation tr; |
| 1994 | |
| 1995 | r = -EFAULT; |
Al Viro | 2f366987 | 2007-02-09 16:38:35 +0000 | [diff] [blame] | 1996 | if (copy_from_user(&tr, argp, sizeof tr)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1997 | goto out; |
Zhang Xiantao | 8b00679 | 2007-11-16 13:05:55 +0800 | [diff] [blame] | 1998 | r = kvm_arch_vcpu_ioctl_translate(vcpu, &tr); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1999 | if (r) |
| 2000 | goto out; |
| 2001 | r = -EFAULT; |
Al Viro | 2f366987 | 2007-02-09 16:38:35 +0000 | [diff] [blame] | 2002 | if (copy_to_user(argp, &tr, sizeof tr)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2003 | goto out; |
| 2004 | r = 0; |
| 2005 | break; |
| 2006 | } |
Jan Kiszka | d0bfb94 | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 2007 | case KVM_SET_GUEST_DEBUG: { |
| 2008 | struct kvm_guest_debug dbg; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2009 | |
| 2010 | r = -EFAULT; |
Al Viro | 2f366987 | 2007-02-09 16:38:35 +0000 | [diff] [blame] | 2011 | if (copy_from_user(&dbg, argp, sizeof dbg)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2012 | goto out; |
Jan Kiszka | d0bfb94 | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 2013 | r = kvm_arch_vcpu_ioctl_set_guest_debug(vcpu, &dbg); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2014 | if (r) |
| 2015 | goto out; |
| 2016 | r = 0; |
| 2017 | break; |
| 2018 | } |
Avi Kivity | 1961d27 | 2007-03-05 19:46:05 +0200 | [diff] [blame] | 2019 | case KVM_SET_SIGNAL_MASK: { |
| 2020 | struct kvm_signal_mask __user *sigmask_arg = argp; |
| 2021 | struct kvm_signal_mask kvm_sigmask; |
| 2022 | sigset_t sigset, *p; |
| 2023 | |
| 2024 | p = NULL; |
| 2025 | if (argp) { |
| 2026 | r = -EFAULT; |
| 2027 | if (copy_from_user(&kvm_sigmask, argp, |
| 2028 | sizeof kvm_sigmask)) |
| 2029 | goto out; |
| 2030 | r = -EINVAL; |
| 2031 | if (kvm_sigmask.len != sizeof sigset) |
| 2032 | goto out; |
| 2033 | r = -EFAULT; |
| 2034 | if (copy_from_user(&sigset, sigmask_arg->sigset, |
| 2035 | sizeof sigset)) |
| 2036 | goto out; |
| 2037 | p = &sigset; |
| 2038 | } |
Andi Kleen | 376d41f | 2010-06-10 13:10:47 +0200 | [diff] [blame] | 2039 | r = kvm_vcpu_ioctl_set_sigmask(vcpu, p); |
Avi Kivity | 1961d27 | 2007-03-05 19:46:05 +0200 | [diff] [blame] | 2040 | break; |
| 2041 | } |
Avi Kivity | b883673 | 2007-04-01 16:34:31 +0300 | [diff] [blame] | 2042 | case KVM_GET_FPU: { |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 2043 | fpu = kzalloc(sizeof(struct kvm_fpu), GFP_KERNEL); |
| 2044 | r = -ENOMEM; |
| 2045 | if (!fpu) |
| 2046 | goto out; |
| 2047 | r = kvm_arch_vcpu_ioctl_get_fpu(vcpu, fpu); |
Avi Kivity | b883673 | 2007-04-01 16:34:31 +0300 | [diff] [blame] | 2048 | if (r) |
| 2049 | goto out; |
| 2050 | r = -EFAULT; |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 2051 | if (copy_to_user(argp, fpu, sizeof(struct kvm_fpu))) |
Avi Kivity | b883673 | 2007-04-01 16:34:31 +0300 | [diff] [blame] | 2052 | goto out; |
| 2053 | r = 0; |
| 2054 | break; |
| 2055 | } |
| 2056 | case KVM_SET_FPU: { |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 2057 | fpu = memdup_user(argp, sizeof(*fpu)); |
| 2058 | if (IS_ERR(fpu)) { |
| 2059 | r = PTR_ERR(fpu); |
Avi Kivity | b883673 | 2007-04-01 16:34:31 +0300 | [diff] [blame] | 2060 | goto out; |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 2061 | } |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 2062 | r = kvm_arch_vcpu_ioctl_set_fpu(vcpu, fpu); |
Avi Kivity | b883673 | 2007-04-01 16:34:31 +0300 | [diff] [blame] | 2063 | if (r) |
| 2064 | goto out; |
| 2065 | r = 0; |
| 2066 | break; |
| 2067 | } |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2068 | default: |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 2069 | r = kvm_arch_vcpu_ioctl(filp, ioctl, arg); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2070 | } |
| 2071 | out: |
Avi Kivity | 2122ff5 | 2010-05-13 11:25:04 +0300 | [diff] [blame] | 2072 | vcpu_put(vcpu); |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 2073 | kfree(fpu); |
| 2074 | kfree(kvm_sregs); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2075 | return r; |
| 2076 | } |
| 2077 | |
Alexander Graf | 1dda606 | 2011-06-08 02:45:37 +0200 | [diff] [blame] | 2078 | #ifdef CONFIG_COMPAT |
| 2079 | static long kvm_vcpu_compat_ioctl(struct file *filp, |
| 2080 | unsigned int ioctl, unsigned long arg) |
| 2081 | { |
| 2082 | struct kvm_vcpu *vcpu = filp->private_data; |
| 2083 | void __user *argp = compat_ptr(arg); |
| 2084 | int r; |
| 2085 | |
| 2086 | if (vcpu->kvm->mm != current->mm) |
| 2087 | return -EIO; |
| 2088 | |
| 2089 | switch (ioctl) { |
| 2090 | case KVM_SET_SIGNAL_MASK: { |
| 2091 | struct kvm_signal_mask __user *sigmask_arg = argp; |
| 2092 | struct kvm_signal_mask kvm_sigmask; |
| 2093 | compat_sigset_t csigset; |
| 2094 | sigset_t sigset; |
| 2095 | |
| 2096 | if (argp) { |
| 2097 | r = -EFAULT; |
| 2098 | if (copy_from_user(&kvm_sigmask, argp, |
| 2099 | sizeof kvm_sigmask)) |
| 2100 | goto out; |
| 2101 | r = -EINVAL; |
| 2102 | if (kvm_sigmask.len != sizeof csigset) |
| 2103 | goto out; |
| 2104 | r = -EFAULT; |
| 2105 | if (copy_from_user(&csigset, sigmask_arg->sigset, |
| 2106 | sizeof csigset)) |
| 2107 | goto out; |
Alan Cox | 760a9a3 | 2012-08-22 14:34:11 +0100 | [diff] [blame] | 2108 | sigset_from_compat(&sigset, &csigset); |
| 2109 | r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset); |
| 2110 | } else |
| 2111 | r = kvm_vcpu_ioctl_set_sigmask(vcpu, NULL); |
Alexander Graf | 1dda606 | 2011-06-08 02:45:37 +0200 | [diff] [blame] | 2112 | break; |
| 2113 | } |
| 2114 | default: |
| 2115 | r = kvm_vcpu_ioctl(filp, ioctl, arg); |
| 2116 | } |
| 2117 | |
| 2118 | out: |
| 2119 | return r; |
| 2120 | } |
| 2121 | #endif |
| 2122 | |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2123 | static long kvm_vm_ioctl(struct file *filp, |
| 2124 | unsigned int ioctl, unsigned long arg) |
| 2125 | { |
| 2126 | struct kvm *kvm = filp->private_data; |
| 2127 | void __user *argp = (void __user *)arg; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2128 | int r; |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2129 | |
Avi Kivity | 6d4e4c4 | 2007-11-21 16:41:05 +0200 | [diff] [blame] | 2130 | if (kvm->mm != current->mm) |
| 2131 | return -EIO; |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2132 | switch (ioctl) { |
| 2133 | case KVM_CREATE_VCPU: |
| 2134 | r = kvm_vm_ioctl_create_vcpu(kvm, arg); |
| 2135 | if (r < 0) |
| 2136 | goto out; |
| 2137 | break; |
Izik Eidus | 6fc138d | 2007-10-09 19:20:39 +0200 | [diff] [blame] | 2138 | case KVM_SET_USER_MEMORY_REGION: { |
| 2139 | struct kvm_userspace_memory_region kvm_userspace_mem; |
| 2140 | |
| 2141 | r = -EFAULT; |
| 2142 | if (copy_from_user(&kvm_userspace_mem, argp, |
| 2143 | sizeof kvm_userspace_mem)) |
| 2144 | goto out; |
| 2145 | |
| 2146 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, 1); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2147 | if (r) |
| 2148 | goto out; |
| 2149 | break; |
| 2150 | } |
| 2151 | case KVM_GET_DIRTY_LOG: { |
| 2152 | struct kvm_dirty_log log; |
| 2153 | |
| 2154 | r = -EFAULT; |
Al Viro | 2f366987 | 2007-02-09 16:38:35 +0000 | [diff] [blame] | 2155 | if (copy_from_user(&log, argp, sizeof log)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2156 | goto out; |
Avi Kivity | 2c6f5df | 2007-02-20 18:27:58 +0200 | [diff] [blame] | 2157 | r = kvm_vm_ioctl_get_dirty_log(kvm, &log); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2158 | if (r) |
| 2159 | goto out; |
| 2160 | break; |
| 2161 | } |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2162 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
| 2163 | case KVM_REGISTER_COALESCED_MMIO: { |
| 2164 | struct kvm_coalesced_mmio_zone zone; |
| 2165 | r = -EFAULT; |
| 2166 | if (copy_from_user(&zone, argp, sizeof zone)) |
| 2167 | goto out; |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2168 | r = kvm_vm_ioctl_register_coalesced_mmio(kvm, &zone); |
| 2169 | if (r) |
| 2170 | goto out; |
| 2171 | r = 0; |
| 2172 | break; |
| 2173 | } |
| 2174 | case KVM_UNREGISTER_COALESCED_MMIO: { |
| 2175 | struct kvm_coalesced_mmio_zone zone; |
| 2176 | r = -EFAULT; |
| 2177 | if (copy_from_user(&zone, argp, sizeof zone)) |
| 2178 | goto out; |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2179 | r = kvm_vm_ioctl_unregister_coalesced_mmio(kvm, &zone); |
| 2180 | if (r) |
| 2181 | goto out; |
| 2182 | r = 0; |
| 2183 | break; |
| 2184 | } |
| 2185 | #endif |
Gregory Haskins | 721eecb | 2009-05-20 10:30:49 -0400 | [diff] [blame] | 2186 | case KVM_IRQFD: { |
| 2187 | struct kvm_irqfd data; |
| 2188 | |
| 2189 | r = -EFAULT; |
| 2190 | if (copy_from_user(&data, argp, sizeof data)) |
| 2191 | goto out; |
Alex Williamson | d4db293 | 2012-06-29 09:56:08 -0600 | [diff] [blame] | 2192 | r = kvm_irqfd(kvm, &data); |
Gregory Haskins | 721eecb | 2009-05-20 10:30:49 -0400 | [diff] [blame] | 2193 | break; |
| 2194 | } |
Gregory Haskins | d34e6b1 | 2009-07-07 17:08:49 -0400 | [diff] [blame] | 2195 | case KVM_IOEVENTFD: { |
| 2196 | struct kvm_ioeventfd data; |
| 2197 | |
| 2198 | r = -EFAULT; |
| 2199 | if (copy_from_user(&data, argp, sizeof data)) |
| 2200 | goto out; |
| 2201 | r = kvm_ioeventfd(kvm, &data); |
| 2202 | break; |
| 2203 | } |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 2204 | #ifdef CONFIG_KVM_APIC_ARCHITECTURE |
| 2205 | case KVM_SET_BOOT_CPU_ID: |
| 2206 | r = 0; |
Marcelo Tosatti | 894a9c5 | 2009-06-23 15:05:14 -0300 | [diff] [blame] | 2207 | mutex_lock(&kvm->lock); |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 2208 | if (atomic_read(&kvm->online_vcpus) != 0) |
| 2209 | r = -EBUSY; |
| 2210 | else |
| 2211 | kvm->bsp_vcpu_id = arg; |
Marcelo Tosatti | 894a9c5 | 2009-06-23 15:05:14 -0300 | [diff] [blame] | 2212 | mutex_unlock(&kvm->lock); |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 2213 | break; |
| 2214 | #endif |
Jan Kiszka | 07975ad | 2012-03-29 21:14:12 +0200 | [diff] [blame] | 2215 | #ifdef CONFIG_HAVE_KVM_MSI |
| 2216 | case KVM_SIGNAL_MSI: { |
| 2217 | struct kvm_msi msi; |
| 2218 | |
| 2219 | r = -EFAULT; |
| 2220 | if (copy_from_user(&msi, argp, sizeof msi)) |
| 2221 | goto out; |
| 2222 | r = kvm_send_userspace_msi(kvm, &msi); |
| 2223 | break; |
| 2224 | } |
| 2225 | #endif |
Christoffer Dall | 23d43cf | 2012-07-24 08:51:20 -0400 | [diff] [blame] | 2226 | #ifdef __KVM_HAVE_IRQ_LINE |
| 2227 | case KVM_IRQ_LINE_STATUS: |
| 2228 | case KVM_IRQ_LINE: { |
| 2229 | struct kvm_irq_level irq_event; |
| 2230 | |
| 2231 | r = -EFAULT; |
| 2232 | if (copy_from_user(&irq_event, argp, sizeof irq_event)) |
| 2233 | goto out; |
| 2234 | |
| 2235 | r = kvm_vm_ioctl_irq_line(kvm, &irq_event); |
| 2236 | if (r) |
| 2237 | goto out; |
| 2238 | |
| 2239 | r = -EFAULT; |
| 2240 | if (ioctl == KVM_IRQ_LINE_STATUS) { |
| 2241 | if (copy_to_user(argp, &irq_event, sizeof irq_event)) |
| 2242 | goto out; |
| 2243 | } |
| 2244 | |
| 2245 | r = 0; |
| 2246 | break; |
| 2247 | } |
| 2248 | #endif |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2249 | default: |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2250 | r = kvm_arch_vm_ioctl(filp, ioctl, arg); |
Avi Kivity | bfd99ff | 2009-08-26 14:57:50 +0300 | [diff] [blame] | 2251 | if (r == -ENOTTY) |
| 2252 | r = kvm_vm_ioctl_assigned_device(kvm, ioctl, arg); |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2253 | } |
| 2254 | out: |
| 2255 | return r; |
| 2256 | } |
| 2257 | |
Arnd Bergmann | 6ff5894 | 2009-10-22 14:19:27 +0200 | [diff] [blame] | 2258 | #ifdef CONFIG_COMPAT |
| 2259 | struct compat_kvm_dirty_log { |
| 2260 | __u32 slot; |
| 2261 | __u32 padding1; |
| 2262 | union { |
| 2263 | compat_uptr_t dirty_bitmap; /* one bit per page */ |
| 2264 | __u64 padding2; |
| 2265 | }; |
| 2266 | }; |
| 2267 | |
| 2268 | static long kvm_vm_compat_ioctl(struct file *filp, |
| 2269 | unsigned int ioctl, unsigned long arg) |
| 2270 | { |
| 2271 | struct kvm *kvm = filp->private_data; |
| 2272 | int r; |
| 2273 | |
| 2274 | if (kvm->mm != current->mm) |
| 2275 | return -EIO; |
| 2276 | switch (ioctl) { |
| 2277 | case KVM_GET_DIRTY_LOG: { |
| 2278 | struct compat_kvm_dirty_log compat_log; |
| 2279 | struct kvm_dirty_log log; |
| 2280 | |
| 2281 | r = -EFAULT; |
| 2282 | if (copy_from_user(&compat_log, (void __user *)arg, |
| 2283 | sizeof(compat_log))) |
| 2284 | goto out; |
| 2285 | log.slot = compat_log.slot; |
| 2286 | log.padding1 = compat_log.padding1; |
| 2287 | log.padding2 = compat_log.padding2; |
| 2288 | log.dirty_bitmap = compat_ptr(compat_log.dirty_bitmap); |
| 2289 | |
| 2290 | r = kvm_vm_ioctl_get_dirty_log(kvm, &log); |
| 2291 | if (r) |
| 2292 | goto out; |
| 2293 | break; |
| 2294 | } |
| 2295 | default: |
| 2296 | r = kvm_vm_ioctl(filp, ioctl, arg); |
| 2297 | } |
| 2298 | |
| 2299 | out: |
| 2300 | return r; |
| 2301 | } |
| 2302 | #endif |
| 2303 | |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 2304 | 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] | 2305 | { |
Marcelo Tosatti | 777b3f4 | 2008-09-16 20:54:46 -0300 | [diff] [blame] | 2306 | struct page *page[1]; |
| 2307 | unsigned long addr; |
| 2308 | int npages; |
| 2309 | gfn_t gfn = vmf->pgoff; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2310 | struct kvm *kvm = vma->vm_file->private_data; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2311 | |
Marcelo Tosatti | 777b3f4 | 2008-09-16 20:54:46 -0300 | [diff] [blame] | 2312 | addr = gfn_to_hva(kvm, gfn); |
| 2313 | if (kvm_is_error_hva(addr)) |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 2314 | return VM_FAULT_SIGBUS; |
Marcelo Tosatti | 777b3f4 | 2008-09-16 20:54:46 -0300 | [diff] [blame] | 2315 | |
| 2316 | npages = get_user_pages(current, current->mm, addr, 1, 1, 0, page, |
| 2317 | NULL); |
| 2318 | if (unlikely(npages != 1)) |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 2319 | return VM_FAULT_SIGBUS; |
Marcelo Tosatti | 777b3f4 | 2008-09-16 20:54:46 -0300 | [diff] [blame] | 2320 | |
| 2321 | vmf->page = page[0]; |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 2322 | return 0; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2323 | } |
| 2324 | |
Alexey Dobriyan | f0f37e2 | 2009-09-27 22:29:37 +0400 | [diff] [blame] | 2325 | static const struct vm_operations_struct kvm_vm_vm_ops = { |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 2326 | .fault = kvm_vm_fault, |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2327 | }; |
| 2328 | |
| 2329 | static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma) |
| 2330 | { |
| 2331 | vma->vm_ops = &kvm_vm_vm_ops; |
| 2332 | return 0; |
| 2333 | } |
| 2334 | |
Christian Borntraeger | 3d3aab1 | 2008-12-02 11:17:32 +0100 | [diff] [blame] | 2335 | static struct file_operations kvm_vm_fops = { |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2336 | .release = kvm_vm_release, |
| 2337 | .unlocked_ioctl = kvm_vm_ioctl, |
Arnd Bergmann | 6ff5894 | 2009-10-22 14:19:27 +0200 | [diff] [blame] | 2338 | #ifdef CONFIG_COMPAT |
| 2339 | .compat_ioctl = kvm_vm_compat_ioctl, |
| 2340 | #endif |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2341 | .mmap = kvm_vm_mmap, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 2342 | .llseek = noop_llseek, |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2343 | }; |
| 2344 | |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 2345 | static int kvm_dev_ioctl_create_vm(unsigned long type) |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2346 | { |
Heiko Carstens | aac8763 | 2010-10-27 17:22:10 +0200 | [diff] [blame] | 2347 | int r; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2348 | struct kvm *kvm; |
| 2349 | |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 2350 | kvm = kvm_create_vm(type); |
Avi Kivity | d6d2816 | 2007-06-28 08:38:16 -0400 | [diff] [blame] | 2351 | if (IS_ERR(kvm)) |
| 2352 | return PTR_ERR(kvm); |
Takuya Yoshikawa | 6ce5a09 | 2010-03-15 22:13:30 +0900 | [diff] [blame] | 2353 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
| 2354 | r = kvm_coalesced_mmio_init(kvm); |
| 2355 | if (r < 0) { |
| 2356 | kvm_put_kvm(kvm); |
| 2357 | return r; |
| 2358 | } |
| 2359 | #endif |
Heiko Carstens | aac8763 | 2010-10-27 17:22:10 +0200 | [diff] [blame] | 2360 | r = anon_inode_getfd("kvm-vm", &kvm_vm_fops, kvm, O_RDWR); |
| 2361 | if (r < 0) |
Al Viro | 66c0b39 | 2008-04-19 20:33:56 +0100 | [diff] [blame] | 2362 | kvm_put_kvm(kvm); |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2363 | |
Heiko Carstens | aac8763 | 2010-10-27 17:22:10 +0200 | [diff] [blame] | 2364 | return r; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2365 | } |
| 2366 | |
Avi Kivity | 1a811b6 | 2008-12-08 18:25:27 +0200 | [diff] [blame] | 2367 | static long kvm_dev_ioctl_check_extension_generic(long arg) |
| 2368 | { |
| 2369 | switch (arg) { |
Avi Kivity | ca9edae | 2008-12-08 18:29:29 +0200 | [diff] [blame] | 2370 | case KVM_CAP_USER_MEMORY: |
Avi Kivity | 1a811b6 | 2008-12-08 18:25:27 +0200 | [diff] [blame] | 2371 | case KVM_CAP_DESTROY_MEMORY_REGION_WORKS: |
Jan Kiszka | 4cd481f | 2009-04-13 11:59:32 +0200 | [diff] [blame] | 2372 | case KVM_CAP_JOIN_MEMORY_REGIONS_WORKS: |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 2373 | #ifdef CONFIG_KVM_APIC_ARCHITECTURE |
| 2374 | case KVM_CAP_SET_BOOT_CPU_ID: |
| 2375 | #endif |
Avi Kivity | a9c7399 | 2009-11-04 11:54:59 +0200 | [diff] [blame] | 2376 | case KVM_CAP_INTERNAL_ERROR_DATA: |
Jan Kiszka | 07975ad | 2012-03-29 21:14:12 +0200 | [diff] [blame] | 2377 | #ifdef CONFIG_HAVE_KVM_MSI |
| 2378 | case KVM_CAP_SIGNAL_MSI: |
| 2379 | #endif |
Avi Kivity | 1a811b6 | 2008-12-08 18:25:27 +0200 | [diff] [blame] | 2380 | return 1; |
Marc Zyngier | 9900b4b | 2012-06-15 15:07:02 -0400 | [diff] [blame] | 2381 | #ifdef KVM_CAP_IRQ_ROUTING |
Avi Kivity | 399ec80 | 2008-11-19 13:58:46 +0200 | [diff] [blame] | 2382 | case KVM_CAP_IRQ_ROUTING: |
Sheng Yang | 3646314 | 2009-03-16 16:33:43 +0800 | [diff] [blame] | 2383 | return KVM_MAX_IRQ_ROUTES; |
Avi Kivity | 399ec80 | 2008-11-19 13:58:46 +0200 | [diff] [blame] | 2384 | #endif |
Avi Kivity | 1a811b6 | 2008-12-08 18:25:27 +0200 | [diff] [blame] | 2385 | default: |
| 2386 | break; |
| 2387 | } |
| 2388 | return kvm_dev_ioctl_check_extension(arg); |
| 2389 | } |
| 2390 | |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2391 | static long kvm_dev_ioctl(struct file *filp, |
| 2392 | unsigned int ioctl, unsigned long arg) |
| 2393 | { |
Avi Kivity | 07c45a3 | 2007-03-07 13:05:38 +0200 | [diff] [blame] | 2394 | long r = -EINVAL; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2395 | |
| 2396 | switch (ioctl) { |
| 2397 | case KVM_GET_API_VERSION: |
Avi Kivity | f0fe510 | 2007-03-07 13:11:17 +0200 | [diff] [blame] | 2398 | r = -EINVAL; |
| 2399 | if (arg) |
| 2400 | goto out; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2401 | r = KVM_API_VERSION; |
| 2402 | break; |
| 2403 | case KVM_CREATE_VM: |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 2404 | r = kvm_dev_ioctl_create_vm(arg); |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2405 | break; |
Zhang Xiantao | 018d00d | 2007-11-15 23:07:47 +0800 | [diff] [blame] | 2406 | case KVM_CHECK_EXTENSION: |
Avi Kivity | 1a811b6 | 2008-12-08 18:25:27 +0200 | [diff] [blame] | 2407 | r = kvm_dev_ioctl_check_extension_generic(arg); |
Avi Kivity | 5d308f4 | 2007-03-01 17:56:20 +0200 | [diff] [blame] | 2408 | break; |
Avi Kivity | 07c45a3 | 2007-03-07 13:05:38 +0200 | [diff] [blame] | 2409 | case KVM_GET_VCPU_MMAP_SIZE: |
| 2410 | r = -EINVAL; |
| 2411 | if (arg) |
| 2412 | goto out; |
Avi Kivity | adb1ff4 | 2008-01-24 15:13:08 +0200 | [diff] [blame] | 2413 | r = PAGE_SIZE; /* struct kvm_run */ |
| 2414 | #ifdef CONFIG_X86 |
| 2415 | r += PAGE_SIZE; /* pio data page */ |
| 2416 | #endif |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2417 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
| 2418 | r += PAGE_SIZE; /* coalesced mmio ring page */ |
| 2419 | #endif |
Avi Kivity | 07c45a3 | 2007-03-07 13:05:38 +0200 | [diff] [blame] | 2420 | break; |
Feng(Eric) Liu | d4c9ff2 | 2008-04-10 08:47:53 -0400 | [diff] [blame] | 2421 | case KVM_TRACE_ENABLE: |
| 2422 | case KVM_TRACE_PAUSE: |
| 2423 | case KVM_TRACE_DISABLE: |
Marcelo Tosatti | 2023a29 | 2009-06-18 11:47:28 -0300 | [diff] [blame] | 2424 | r = -EOPNOTSUPP; |
Feng(Eric) Liu | d4c9ff2 | 2008-04-10 08:47:53 -0400 | [diff] [blame] | 2425 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2426 | default: |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 2427 | return kvm_arch_dev_ioctl(filp, ioctl, arg); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2428 | } |
| 2429 | out: |
| 2430 | return r; |
| 2431 | } |
| 2432 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2433 | static struct file_operations kvm_chardev_ops = { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2434 | .unlocked_ioctl = kvm_dev_ioctl, |
| 2435 | .compat_ioctl = kvm_dev_ioctl, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 2436 | .llseek = noop_llseek, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2437 | }; |
| 2438 | |
| 2439 | static struct miscdevice kvm_dev = { |
Avi Kivity | bbe4432 | 2007-03-04 13:27:36 +0200 | [diff] [blame] | 2440 | KVM_MINOR, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2441 | "kvm", |
| 2442 | &kvm_chardev_ops, |
| 2443 | }; |
| 2444 | |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2445 | static void hardware_enable_nolock(void *junk) |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 2446 | { |
| 2447 | int cpu = raw_smp_processor_id(); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2448 | int r; |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 2449 | |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 2450 | if (cpumask_test_cpu(cpu, cpus_hardware_enabled)) |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 2451 | return; |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2452 | |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 2453 | cpumask_set_cpu(cpu, cpus_hardware_enabled); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2454 | |
| 2455 | r = kvm_arch_hardware_enable(NULL); |
| 2456 | |
| 2457 | if (r) { |
| 2458 | cpumask_clear_cpu(cpu, cpus_hardware_enabled); |
| 2459 | atomic_inc(&hardware_enable_failed); |
| 2460 | printk(KERN_INFO "kvm: enabling virtualization on " |
| 2461 | "CPU%d failed\n", cpu); |
| 2462 | } |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 2463 | } |
| 2464 | |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2465 | static void hardware_enable(void *junk) |
| 2466 | { |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2467 | raw_spin_lock(&kvm_lock); |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2468 | hardware_enable_nolock(junk); |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2469 | raw_spin_unlock(&kvm_lock); |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2470 | } |
| 2471 | |
| 2472 | static void hardware_disable_nolock(void *junk) |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 2473 | { |
| 2474 | int cpu = raw_smp_processor_id(); |
| 2475 | |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 2476 | if (!cpumask_test_cpu(cpu, cpus_hardware_enabled)) |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 2477 | return; |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 2478 | cpumask_clear_cpu(cpu, cpus_hardware_enabled); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 2479 | kvm_arch_hardware_disable(NULL); |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 2480 | } |
| 2481 | |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2482 | static void hardware_disable(void *junk) |
| 2483 | { |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2484 | raw_spin_lock(&kvm_lock); |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2485 | hardware_disable_nolock(junk); |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2486 | raw_spin_unlock(&kvm_lock); |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2487 | } |
| 2488 | |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2489 | static void hardware_disable_all_nolock(void) |
| 2490 | { |
| 2491 | BUG_ON(!kvm_usage_count); |
| 2492 | |
| 2493 | kvm_usage_count--; |
| 2494 | if (!kvm_usage_count) |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2495 | on_each_cpu(hardware_disable_nolock, NULL, 1); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2496 | } |
| 2497 | |
| 2498 | static void hardware_disable_all(void) |
| 2499 | { |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2500 | raw_spin_lock(&kvm_lock); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2501 | hardware_disable_all_nolock(); |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2502 | raw_spin_unlock(&kvm_lock); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2503 | } |
| 2504 | |
| 2505 | static int hardware_enable_all(void) |
| 2506 | { |
| 2507 | int r = 0; |
| 2508 | |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2509 | raw_spin_lock(&kvm_lock); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2510 | |
| 2511 | kvm_usage_count++; |
| 2512 | if (kvm_usage_count == 1) { |
| 2513 | atomic_set(&hardware_enable_failed, 0); |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2514 | on_each_cpu(hardware_enable_nolock, NULL, 1); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2515 | |
| 2516 | if (atomic_read(&hardware_enable_failed)) { |
| 2517 | hardware_disable_all_nolock(); |
| 2518 | r = -EBUSY; |
| 2519 | } |
| 2520 | } |
| 2521 | |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2522 | raw_spin_unlock(&kvm_lock); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2523 | |
| 2524 | return r; |
| 2525 | } |
| 2526 | |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 2527 | static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val, |
| 2528 | void *v) |
| 2529 | { |
| 2530 | int cpu = (long)v; |
| 2531 | |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2532 | if (!kvm_usage_count) |
| 2533 | return NOTIFY_OK; |
| 2534 | |
Avi Kivity | 1a6f4d7 | 2007-11-11 18:37:32 +0200 | [diff] [blame] | 2535 | val &= ~CPU_TASKS_FROZEN; |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 2536 | switch (val) { |
Avi Kivity | cec9ad2 | 2007-05-24 13:11:41 +0300 | [diff] [blame] | 2537 | case CPU_DYING: |
Avi Kivity | 6ec8a856 | 2007-08-19 15:57:26 +0300 | [diff] [blame] | 2538 | printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n", |
| 2539 | cpu); |
| 2540 | hardware_disable(NULL); |
| 2541 | break; |
Zachary Amsden | da908f2 | 2010-08-19 22:07:27 -1000 | [diff] [blame] | 2542 | case CPU_STARTING: |
Jeremy Katz | 43934a3 | 2007-02-19 14:37:46 +0200 | [diff] [blame] | 2543 | printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n", |
| 2544 | cpu); |
Zachary Amsden | da908f2 | 2010-08-19 22:07:27 -1000 | [diff] [blame] | 2545 | hardware_enable(NULL); |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 2546 | break; |
| 2547 | } |
| 2548 | return NOTIFY_OK; |
| 2549 | } |
| 2550 | |
Avi Kivity | 4ecac3f | 2008-05-13 13:23:38 +0300 | [diff] [blame] | 2551 | |
Avi Kivity | b7c4145 | 2010-12-02 17:52:50 +0200 | [diff] [blame] | 2552 | asmlinkage void kvm_spurious_fault(void) |
Avi Kivity | 4ecac3f | 2008-05-13 13:23:38 +0300 | [diff] [blame] | 2553 | { |
Avi Kivity | 4ecac3f | 2008-05-13 13:23:38 +0300 | [diff] [blame] | 2554 | /* Fault while not rebooting. We want the trace. */ |
| 2555 | BUG(); |
| 2556 | } |
Avi Kivity | b7c4145 | 2010-12-02 17:52:50 +0200 | [diff] [blame] | 2557 | EXPORT_SYMBOL_GPL(kvm_spurious_fault); |
Avi Kivity | 4ecac3f | 2008-05-13 13:23:38 +0300 | [diff] [blame] | 2558 | |
Rusty Russell | 9a2b85c | 2007-07-17 23:17:55 +1000 | [diff] [blame] | 2559 | static int kvm_reboot(struct notifier_block *notifier, unsigned long val, |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 2560 | void *v) |
Rusty Russell | 9a2b85c | 2007-07-17 23:17:55 +1000 | [diff] [blame] | 2561 | { |
Sheng Yang | 8e1c181 | 2009-04-29 11:09:04 +0800 | [diff] [blame] | 2562 | /* |
| 2563 | * Some (well, at least mine) BIOSes hang on reboot if |
| 2564 | * in vmx root mode. |
| 2565 | * |
| 2566 | * And Intel TXT required VMX off for all cpu when system shutdown. |
| 2567 | */ |
| 2568 | printk(KERN_INFO "kvm: exiting hardware virtualization\n"); |
| 2569 | kvm_rebooting = true; |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2570 | on_each_cpu(hardware_disable_nolock, NULL, 1); |
Rusty Russell | 9a2b85c | 2007-07-17 23:17:55 +1000 | [diff] [blame] | 2571 | return NOTIFY_OK; |
| 2572 | } |
| 2573 | |
| 2574 | static struct notifier_block kvm_reboot_notifier = { |
| 2575 | .notifier_call = kvm_reboot, |
| 2576 | .priority = 0, |
| 2577 | }; |
| 2578 | |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2579 | static void kvm_io_bus_destroy(struct kvm_io_bus *bus) |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 2580 | { |
| 2581 | int i; |
| 2582 | |
| 2583 | for (i = 0; i < bus->dev_count; i++) { |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2584 | struct kvm_io_device *pos = bus->range[i].dev; |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 2585 | |
| 2586 | kvm_iodevice_destructor(pos); |
| 2587 | } |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2588 | kfree(bus); |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 2589 | } |
| 2590 | |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2591 | int kvm_io_bus_sort_cmp(const void *p1, const void *p2) |
| 2592 | { |
| 2593 | const struct kvm_io_range *r1 = p1; |
| 2594 | const struct kvm_io_range *r2 = p2; |
| 2595 | |
| 2596 | if (r1->addr < r2->addr) |
| 2597 | return -1; |
| 2598 | if (r1->addr + r1->len > r2->addr + r2->len) |
| 2599 | return 1; |
| 2600 | return 0; |
| 2601 | } |
| 2602 | |
| 2603 | int kvm_io_bus_insert_dev(struct kvm_io_bus *bus, struct kvm_io_device *dev, |
| 2604 | gpa_t addr, int len) |
| 2605 | { |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2606 | bus->range[bus->dev_count++] = (struct kvm_io_range) { |
| 2607 | .addr = addr, |
| 2608 | .len = len, |
| 2609 | .dev = dev, |
| 2610 | }; |
| 2611 | |
| 2612 | sort(bus->range, bus->dev_count, sizeof(struct kvm_io_range), |
| 2613 | kvm_io_bus_sort_cmp, NULL); |
| 2614 | |
| 2615 | return 0; |
| 2616 | } |
| 2617 | |
| 2618 | int kvm_io_bus_get_first_dev(struct kvm_io_bus *bus, |
| 2619 | gpa_t addr, int len) |
| 2620 | { |
| 2621 | struct kvm_io_range *range, key; |
| 2622 | int off; |
| 2623 | |
| 2624 | key = (struct kvm_io_range) { |
| 2625 | .addr = addr, |
| 2626 | .len = len, |
| 2627 | }; |
| 2628 | |
| 2629 | range = bsearch(&key, bus->range, bus->dev_count, |
| 2630 | sizeof(struct kvm_io_range), kvm_io_bus_sort_cmp); |
| 2631 | if (range == NULL) |
| 2632 | return -ENOENT; |
| 2633 | |
| 2634 | off = range - bus->range; |
| 2635 | |
| 2636 | while (off > 0 && kvm_io_bus_sort_cmp(&key, &bus->range[off-1]) == 0) |
| 2637 | off--; |
| 2638 | |
| 2639 | return off; |
| 2640 | } |
| 2641 | |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 2642 | /* kvm_io_bus_write - called under kvm->slots_lock */ |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2643 | 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] | 2644 | int len, const void *val) |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 2645 | { |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2646 | int idx; |
Lai Jiangshan | 90d83dc | 2010-04-19 17:41:23 +0800 | [diff] [blame] | 2647 | struct kvm_io_bus *bus; |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2648 | struct kvm_io_range range; |
| 2649 | |
| 2650 | range = (struct kvm_io_range) { |
| 2651 | .addr = addr, |
| 2652 | .len = len, |
| 2653 | }; |
Lai Jiangshan | 90d83dc | 2010-04-19 17:41:23 +0800 | [diff] [blame] | 2654 | |
| 2655 | bus = srcu_dereference(kvm->buses[bus_idx], &kvm->srcu); |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2656 | idx = kvm_io_bus_get_first_dev(bus, addr, len); |
| 2657 | if (idx < 0) |
| 2658 | return -EOPNOTSUPP; |
| 2659 | |
| 2660 | while (idx < bus->dev_count && |
| 2661 | kvm_io_bus_sort_cmp(&range, &bus->range[idx]) == 0) { |
| 2662 | if (!kvm_iodevice_write(bus->range[idx].dev, addr, len, val)) |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 2663 | return 0; |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2664 | idx++; |
| 2665 | } |
| 2666 | |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 2667 | return -EOPNOTSUPP; |
| 2668 | } |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 2669 | |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 2670 | /* kvm_io_bus_read - called under kvm->slots_lock */ |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2671 | int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, |
| 2672 | int len, void *val) |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 2673 | { |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2674 | int idx; |
Lai Jiangshan | 90d83dc | 2010-04-19 17:41:23 +0800 | [diff] [blame] | 2675 | struct kvm_io_bus *bus; |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2676 | struct kvm_io_range range; |
| 2677 | |
| 2678 | range = (struct kvm_io_range) { |
| 2679 | .addr = addr, |
| 2680 | .len = len, |
| 2681 | }; |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2682 | |
Lai Jiangshan | 90d83dc | 2010-04-19 17:41:23 +0800 | [diff] [blame] | 2683 | bus = srcu_dereference(kvm->buses[bus_idx], &kvm->srcu); |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2684 | idx = kvm_io_bus_get_first_dev(bus, addr, len); |
| 2685 | if (idx < 0) |
| 2686 | return -EOPNOTSUPP; |
| 2687 | |
| 2688 | while (idx < bus->dev_count && |
| 2689 | kvm_io_bus_sort_cmp(&range, &bus->range[idx]) == 0) { |
| 2690 | if (!kvm_iodevice_read(bus->range[idx].dev, addr, len, val)) |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 2691 | return 0; |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2692 | idx++; |
| 2693 | } |
| 2694 | |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 2695 | return -EOPNOTSUPP; |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 2696 | } |
| 2697 | |
Marcelo Tosatti | 79fac95 | 2009-12-23 14:35:26 -0200 | [diff] [blame] | 2698 | /* Caller must hold slots_lock. */ |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2699 | int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, |
| 2700 | int len, struct kvm_io_device *dev) |
Michael S. Tsirkin | 6c47469 | 2009-06-29 22:24:26 +0300 | [diff] [blame] | 2701 | { |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2702 | struct kvm_io_bus *new_bus, *bus; |
Gregory Haskins | 090b7af | 2009-07-07 17:08:44 -0400 | [diff] [blame] | 2703 | |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2704 | bus = kvm->buses[bus_idx]; |
Amos Kong | a1300716 | 2012-03-09 12:17:32 +0800 | [diff] [blame] | 2705 | if (bus->dev_count > NR_IOBUS_DEVS - 1) |
Gregory Haskins | 090b7af | 2009-07-07 17:08:44 -0400 | [diff] [blame] | 2706 | return -ENOSPC; |
| 2707 | |
Amos Kong | a1300716 | 2012-03-09 12:17:32 +0800 | [diff] [blame] | 2708 | new_bus = kzalloc(sizeof(*bus) + ((bus->dev_count + 1) * |
| 2709 | sizeof(struct kvm_io_range)), GFP_KERNEL); |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2710 | if (!new_bus) |
| 2711 | return -ENOMEM; |
Amos Kong | a1300716 | 2012-03-09 12:17:32 +0800 | [diff] [blame] | 2712 | memcpy(new_bus, bus, sizeof(*bus) + (bus->dev_count * |
| 2713 | sizeof(struct kvm_io_range))); |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2714 | kvm_io_bus_insert_dev(new_bus, dev, addr, len); |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2715 | rcu_assign_pointer(kvm->buses[bus_idx], new_bus); |
| 2716 | synchronize_srcu_expedited(&kvm->srcu); |
| 2717 | kfree(bus); |
Gregory Haskins | 090b7af | 2009-07-07 17:08:44 -0400 | [diff] [blame] | 2718 | |
| 2719 | return 0; |
| 2720 | } |
| 2721 | |
Marcelo Tosatti | 79fac95 | 2009-12-23 14:35:26 -0200 | [diff] [blame] | 2722 | /* Caller must hold slots_lock. */ |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2723 | int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx, |
| 2724 | struct kvm_io_device *dev) |
Gregory Haskins | 090b7af | 2009-07-07 17:08:44 -0400 | [diff] [blame] | 2725 | { |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2726 | int i, r; |
| 2727 | struct kvm_io_bus *new_bus, *bus; |
Michael S. Tsirkin | 6c47469 | 2009-06-29 22:24:26 +0300 | [diff] [blame] | 2728 | |
Sasha Levin | cdfca7b | 2011-12-04 19:36:28 +0200 | [diff] [blame] | 2729 | bus = kvm->buses[bus_idx]; |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2730 | r = -ENOENT; |
Amos Kong | a1300716 | 2012-03-09 12:17:32 +0800 | [diff] [blame] | 2731 | for (i = 0; i < bus->dev_count; i++) |
| 2732 | if (bus->range[i].dev == dev) { |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2733 | r = 0; |
Gregory Haskins | 090b7af | 2009-07-07 17:08:44 -0400 | [diff] [blame] | 2734 | break; |
| 2735 | } |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2736 | |
Amos Kong | a1300716 | 2012-03-09 12:17:32 +0800 | [diff] [blame] | 2737 | if (r) |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2738 | return r; |
Amos Kong | a1300716 | 2012-03-09 12:17:32 +0800 | [diff] [blame] | 2739 | |
| 2740 | new_bus = kzalloc(sizeof(*bus) + ((bus->dev_count - 1) * |
| 2741 | sizeof(struct kvm_io_range)), GFP_KERNEL); |
| 2742 | if (!new_bus) |
| 2743 | return -ENOMEM; |
| 2744 | |
| 2745 | memcpy(new_bus, bus, sizeof(*bus) + i * sizeof(struct kvm_io_range)); |
| 2746 | new_bus->dev_count--; |
| 2747 | memcpy(new_bus->range + i, bus->range + i + 1, |
| 2748 | (new_bus->dev_count - i) * sizeof(struct kvm_io_range)); |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2749 | |
| 2750 | rcu_assign_pointer(kvm->buses[bus_idx], new_bus); |
| 2751 | synchronize_srcu_expedited(&kvm->srcu); |
| 2752 | kfree(bus); |
| 2753 | return r; |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 2754 | } |
| 2755 | |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 2756 | static struct notifier_block kvm_cpu_notifier = { |
| 2757 | .notifier_call = kvm_cpu_hotplug, |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 2758 | }; |
| 2759 | |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 2760 | static int vm_stat_get(void *_offset, u64 *val) |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 2761 | { |
| 2762 | unsigned offset = (long)_offset; |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 2763 | struct kvm *kvm; |
| 2764 | |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 2765 | *val = 0; |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2766 | raw_spin_lock(&kvm_lock); |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 2767 | list_for_each_entry(kvm, &vm_list, vm_list) |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 2768 | *val += *(u32 *)((void *)kvm + offset); |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2769 | raw_spin_unlock(&kvm_lock); |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 2770 | return 0; |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 2771 | } |
| 2772 | |
| 2773 | DEFINE_SIMPLE_ATTRIBUTE(vm_stat_fops, vm_stat_get, NULL, "%llu\n"); |
| 2774 | |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 2775 | static int vcpu_stat_get(void *_offset, u64 *val) |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 2776 | { |
| 2777 | unsigned offset = (long)_offset; |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 2778 | struct kvm *kvm; |
| 2779 | struct kvm_vcpu *vcpu; |
| 2780 | int i; |
| 2781 | |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 2782 | *val = 0; |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2783 | raw_spin_lock(&kvm_lock); |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 2784 | list_for_each_entry(kvm, &vm_list, vm_list) |
Gleb Natapov | 988a2ca | 2009-06-09 15:56:29 +0300 | [diff] [blame] | 2785 | kvm_for_each_vcpu(i, vcpu, kvm) |
| 2786 | *val += *(u32 *)((void *)vcpu + offset); |
| 2787 | |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2788 | raw_spin_unlock(&kvm_lock); |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 2789 | return 0; |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 2790 | } |
| 2791 | |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 2792 | DEFINE_SIMPLE_ATTRIBUTE(vcpu_stat_fops, vcpu_stat_get, NULL, "%llu\n"); |
| 2793 | |
Alexey Dobriyan | 828c095 | 2009-10-01 15:43:56 -0700 | [diff] [blame] | 2794 | static const struct file_operations *stat_fops[] = { |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 2795 | [KVM_STAT_VCPU] = &vcpu_stat_fops, |
| 2796 | [KVM_STAT_VM] = &vm_stat_fops, |
| 2797 | }; |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 2798 | |
Hamo | 4f69b68 | 2011-12-15 14:23:16 +0800 | [diff] [blame] | 2799 | static int kvm_init_debug(void) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2800 | { |
Hamo | 4f69b68 | 2011-12-15 14:23:16 +0800 | [diff] [blame] | 2801 | int r = -EFAULT; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2802 | struct kvm_stats_debugfs_item *p; |
| 2803 | |
Hollis Blanchard | 76f7c87 | 2008-04-15 16:05:42 -0500 | [diff] [blame] | 2804 | kvm_debugfs_dir = debugfs_create_dir("kvm", NULL); |
Hamo | 4f69b68 | 2011-12-15 14:23:16 +0800 | [diff] [blame] | 2805 | if (kvm_debugfs_dir == NULL) |
| 2806 | goto out; |
| 2807 | |
| 2808 | for (p = debugfs_entries; p->name; ++p) { |
Hollis Blanchard | 76f7c87 | 2008-04-15 16:05:42 -0500 | [diff] [blame] | 2809 | p->dentry = debugfs_create_file(p->name, 0444, kvm_debugfs_dir, |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 2810 | (void *)(long)p->offset, |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 2811 | stat_fops[p->kind]); |
Hamo | 4f69b68 | 2011-12-15 14:23:16 +0800 | [diff] [blame] | 2812 | if (p->dentry == NULL) |
| 2813 | goto out_dir; |
| 2814 | } |
| 2815 | |
| 2816 | return 0; |
| 2817 | |
| 2818 | out_dir: |
| 2819 | debugfs_remove_recursive(kvm_debugfs_dir); |
| 2820 | out: |
| 2821 | return r; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2822 | } |
| 2823 | |
| 2824 | static void kvm_exit_debug(void) |
| 2825 | { |
| 2826 | struct kvm_stats_debugfs_item *p; |
| 2827 | |
| 2828 | for (p = debugfs_entries; p->name; ++p) |
| 2829 | debugfs_remove(p->dentry); |
Hollis Blanchard | 76f7c87 | 2008-04-15 16:05:42 -0500 | [diff] [blame] | 2830 | debugfs_remove(kvm_debugfs_dir); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2831 | } |
| 2832 | |
Rafael J. Wysocki | fb3600c | 2011-03-23 22:16:23 +0100 | [diff] [blame] | 2833 | static int kvm_suspend(void) |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 2834 | { |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2835 | if (kvm_usage_count) |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2836 | hardware_disable_nolock(NULL); |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 2837 | return 0; |
| 2838 | } |
| 2839 | |
Rafael J. Wysocki | fb3600c | 2011-03-23 22:16:23 +0100 | [diff] [blame] | 2840 | static void kvm_resume(void) |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 2841 | { |
Zachary Amsden | ca84d1a | 2010-08-19 22:07:28 -1000 | [diff] [blame] | 2842 | if (kvm_usage_count) { |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2843 | WARN_ON(raw_spin_is_locked(&kvm_lock)); |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2844 | hardware_enable_nolock(NULL); |
Zachary Amsden | ca84d1a | 2010-08-19 22:07:28 -1000 | [diff] [blame] | 2845 | } |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 2846 | } |
| 2847 | |
Rafael J. Wysocki | fb3600c | 2011-03-23 22:16:23 +0100 | [diff] [blame] | 2848 | static struct syscore_ops kvm_syscore_ops = { |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 2849 | .suspend = kvm_suspend, |
| 2850 | .resume = kvm_resume, |
| 2851 | }; |
| 2852 | |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 2853 | static inline |
| 2854 | struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn) |
| 2855 | { |
| 2856 | return container_of(pn, struct kvm_vcpu, preempt_notifier); |
| 2857 | } |
| 2858 | |
| 2859 | static void kvm_sched_in(struct preempt_notifier *pn, int cpu) |
| 2860 | { |
| 2861 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); |
| 2862 | |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 2863 | kvm_arch_vcpu_load(vcpu, cpu); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 2864 | } |
| 2865 | |
| 2866 | static void kvm_sched_out(struct preempt_notifier *pn, |
| 2867 | struct task_struct *next) |
| 2868 | { |
| 2869 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); |
| 2870 | |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 2871 | kvm_arch_vcpu_put(vcpu); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 2872 | } |
| 2873 | |
Avi Kivity | 0ee75be | 2010-04-28 15:39:01 +0300 | [diff] [blame] | 2874 | int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align, |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 2875 | struct module *module) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2876 | { |
| 2877 | int r; |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 2878 | int cpu; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2879 | |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 2880 | r = kvm_arch_init(opaque); |
| 2881 | if (r) |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2882 | goto out_fail; |
Zhang Xiantao | cb498ea | 2007-11-14 20:39:31 +0800 | [diff] [blame] | 2883 | |
Avi Kivity | 8437a61 | 2009-06-06 14:52:35 -0700 | [diff] [blame] | 2884 | if (!zalloc_cpumask_var(&cpus_hardware_enabled, GFP_KERNEL)) { |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 2885 | r = -ENOMEM; |
| 2886 | goto out_free_0; |
| 2887 | } |
| 2888 | |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 2889 | r = kvm_arch_hardware_setup(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2890 | if (r < 0) |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 2891 | goto out_free_0a; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2892 | |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 2893 | for_each_online_cpu(cpu) { |
| 2894 | smp_call_function_single(cpu, |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 2895 | kvm_arch_check_processor_compat, |
Jens Axboe | 8691e5a | 2008-06-06 11:18:06 +0200 | [diff] [blame] | 2896 | &r, 1); |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 2897 | if (r < 0) |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2898 | goto out_free_1; |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 2899 | } |
| 2900 | |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 2901 | r = register_cpu_notifier(&kvm_cpu_notifier); |
| 2902 | if (r) |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2903 | goto out_free_2; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2904 | register_reboot_notifier(&kvm_reboot_notifier); |
| 2905 | |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 2906 | /* A kmem cache lets us meet the alignment requirements of fx_save. */ |
Avi Kivity | 0ee75be | 2010-04-28 15:39:01 +0300 | [diff] [blame] | 2907 | if (!vcpu_align) |
| 2908 | vcpu_align = __alignof__(struct kvm_vcpu); |
| 2909 | kvm_vcpu_cache = kmem_cache_create("kvm_vcpu", vcpu_size, vcpu_align, |
Joe Perches | 56919c5 | 2007-11-12 20:06:51 -0800 | [diff] [blame] | 2910 | 0, NULL); |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 2911 | if (!kvm_vcpu_cache) { |
| 2912 | r = -ENOMEM; |
Rafael J. Wysocki | fb3600c | 2011-03-23 22:16:23 +0100 | [diff] [blame] | 2913 | goto out_free_3; |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 2914 | } |
| 2915 | |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 2916 | r = kvm_async_pf_init(); |
| 2917 | if (r) |
| 2918 | goto out_free; |
| 2919 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2920 | kvm_chardev_ops.owner = module; |
Christian Borntraeger | 3d3aab1 | 2008-12-02 11:17:32 +0100 | [diff] [blame] | 2921 | kvm_vm_fops.owner = module; |
| 2922 | kvm_vcpu_fops.owner = module; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2923 | |
| 2924 | r = misc_register(&kvm_dev); |
| 2925 | if (r) { |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 2926 | printk(KERN_ERR "kvm: misc device register failed\n"); |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 2927 | goto out_unreg; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2928 | } |
| 2929 | |
Rafael J. Wysocki | fb3600c | 2011-03-23 22:16:23 +0100 | [diff] [blame] | 2930 | register_syscore_ops(&kvm_syscore_ops); |
| 2931 | |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 2932 | kvm_preempt_ops.sched_in = kvm_sched_in; |
| 2933 | kvm_preempt_ops.sched_out = kvm_sched_out; |
| 2934 | |
Hamo | 4f69b68 | 2011-12-15 14:23:16 +0800 | [diff] [blame] | 2935 | r = kvm_init_debug(); |
| 2936 | if (r) { |
| 2937 | printk(KERN_ERR "kvm: create debugfs files failed\n"); |
| 2938 | goto out_undebugfs; |
| 2939 | } |
Darrick J. Wong | 0ea4ed8 | 2009-10-14 16:21:00 -0700 | [diff] [blame] | 2940 | |
Avi Kivity | c7addb9 | 2007-09-16 18:58:32 +0200 | [diff] [blame] | 2941 | return 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2942 | |
Hamo | 4f69b68 | 2011-12-15 14:23:16 +0800 | [diff] [blame] | 2943 | out_undebugfs: |
| 2944 | unregister_syscore_ops(&kvm_syscore_ops); |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 2945 | out_unreg: |
| 2946 | kvm_async_pf_deinit(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2947 | out_free: |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 2948 | kmem_cache_destroy(kvm_vcpu_cache); |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2949 | out_free_3: |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2950 | unregister_reboot_notifier(&kvm_reboot_notifier); |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 2951 | unregister_cpu_notifier(&kvm_cpu_notifier); |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2952 | out_free_2: |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2953 | out_free_1: |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 2954 | kvm_arch_hardware_unsetup(); |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 2955 | out_free_0a: |
| 2956 | free_cpumask_var(cpus_hardware_enabled); |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2957 | out_free_0: |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 2958 | kvm_arch_exit(); |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2959 | out_fail: |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2960 | return r; |
| 2961 | } |
Zhang Xiantao | cb498ea | 2007-11-14 20:39:31 +0800 | [diff] [blame] | 2962 | EXPORT_SYMBOL_GPL(kvm_init); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2963 | |
Zhang Xiantao | cb498ea | 2007-11-14 20:39:31 +0800 | [diff] [blame] | 2964 | void kvm_exit(void) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2965 | { |
Darrick J. Wong | 0ea4ed8 | 2009-10-14 16:21:00 -0700 | [diff] [blame] | 2966 | kvm_exit_debug(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2967 | misc_deregister(&kvm_dev); |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 2968 | kmem_cache_destroy(kvm_vcpu_cache); |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 2969 | kvm_async_pf_deinit(); |
Rafael J. Wysocki | fb3600c | 2011-03-23 22:16:23 +0100 | [diff] [blame] | 2970 | unregister_syscore_ops(&kvm_syscore_ops); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2971 | unregister_reboot_notifier(&kvm_reboot_notifier); |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 2972 | unregister_cpu_notifier(&kvm_cpu_notifier); |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2973 | on_each_cpu(hardware_disable_nolock, NULL, 1); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 2974 | kvm_arch_hardware_unsetup(); |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 2975 | kvm_arch_exit(); |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 2976 | free_cpumask_var(cpus_hardware_enabled); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2977 | } |
Zhang Xiantao | cb498ea | 2007-11-14 20:39:31 +0800 | [diff] [blame] | 2978 | EXPORT_SYMBOL_GPL(kvm_exit); |