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 | |
Marcelo Tosatti | d828199 | 2012-11-27 23:29:01 -0200 | [diff] [blame] | 215 | void kvm_make_mclock_inprogress_request(struct kvm *kvm) |
| 216 | { |
| 217 | make_all_cpus_request(kvm, KVM_REQ_MCLOCK_INPROGRESS); |
| 218 | } |
| 219 | |
Yang Zhang | 3d81bc7 | 2013-04-11 19:25:13 +0800 | [diff] [blame] | 220 | void kvm_make_scan_ioapic_request(struct kvm *kvm) |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 221 | { |
Yang Zhang | 3d81bc7 | 2013-04-11 19:25:13 +0800 | [diff] [blame] | 222 | make_all_cpus_request(kvm, KVM_REQ_SCAN_IOAPIC); |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 223 | } |
| 224 | |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 225 | int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id) |
| 226 | { |
| 227 | struct page *page; |
| 228 | int r; |
| 229 | |
| 230 | mutex_init(&vcpu->mutex); |
| 231 | vcpu->cpu = -1; |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 232 | vcpu->kvm = kvm; |
| 233 | vcpu->vcpu_id = id; |
Rik van Riel | 34bb10b | 2011-02-01 09:52:41 -0500 | [diff] [blame] | 234 | vcpu->pid = NULL; |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 235 | init_waitqueue_head(&vcpu->wq); |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 236 | kvm_async_pf_vcpu_init(vcpu); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 237 | |
| 238 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); |
| 239 | if (!page) { |
| 240 | r = -ENOMEM; |
| 241 | goto fail; |
| 242 | } |
| 243 | vcpu->run = page_address(page); |
| 244 | |
Raghavendra K T | 4c08849 | 2012-07-18 19:07:46 +0530 | [diff] [blame] | 245 | kvm_vcpu_set_in_spin_loop(vcpu, false); |
| 246 | kvm_vcpu_set_dy_eligible(vcpu, false); |
Raghavendra K T | 3a08a8f | 2013-03-04 23:32:07 +0530 | [diff] [blame] | 247 | vcpu->preempted = false; |
Raghavendra K T | 4c08849 | 2012-07-18 19:07:46 +0530 | [diff] [blame] | 248 | |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 249 | r = kvm_arch_vcpu_init(vcpu); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 250 | if (r < 0) |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 251 | goto fail_free_run; |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 252 | return 0; |
| 253 | |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 254 | fail_free_run: |
| 255 | free_page((unsigned long)vcpu->run); |
| 256 | fail: |
Rusty Russell | 76fafa5 | 2007-10-08 10:50:48 +1000 | [diff] [blame] | 257 | return r; |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 258 | } |
| 259 | EXPORT_SYMBOL_GPL(kvm_vcpu_init); |
| 260 | |
| 261 | void kvm_vcpu_uninit(struct kvm_vcpu *vcpu) |
| 262 | { |
Rik van Riel | 34bb10b | 2011-02-01 09:52:41 -0500 | [diff] [blame] | 263 | put_pid(vcpu->pid); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 264 | kvm_arch_vcpu_uninit(vcpu); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 265 | free_page((unsigned long)vcpu->run); |
| 266 | } |
| 267 | EXPORT_SYMBOL_GPL(kvm_vcpu_uninit); |
| 268 | |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 269 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) |
| 270 | static inline struct kvm *mmu_notifier_to_kvm(struct mmu_notifier *mn) |
| 271 | { |
| 272 | return container_of(mn, struct kvm, mmu_notifier); |
| 273 | } |
| 274 | |
| 275 | static void kvm_mmu_notifier_invalidate_page(struct mmu_notifier *mn, |
| 276 | struct mm_struct *mm, |
| 277 | unsigned long address) |
| 278 | { |
| 279 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 280 | int need_tlb_flush, idx; |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 281 | |
| 282 | /* |
| 283 | * When ->invalidate_page runs, the linux pte has been zapped |
| 284 | * already but the page is still allocated until |
| 285 | * ->invalidate_page returns. So if we increase the sequence |
| 286 | * here the kvm page fault will notice if the spte can't be |
| 287 | * established because the page is going to be freed. If |
| 288 | * instead the kvm page fault establishes the spte before |
| 289 | * ->invalidate_page runs, kvm_unmap_hva will release it |
| 290 | * before returning. |
| 291 | * |
| 292 | * The sequence increase only need to be seen at spin_unlock |
| 293 | * time, and not at spin_lock time. |
| 294 | * |
| 295 | * Increasing the sequence after the spin_unlock would be |
| 296 | * unsafe because the kvm page fault could then establish the |
| 297 | * pte after kvm_unmap_hva returned, without noticing the page |
| 298 | * is going to be freed. |
| 299 | */ |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 300 | idx = srcu_read_lock(&kvm->srcu); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 301 | spin_lock(&kvm->mmu_lock); |
Takuya Yoshikawa | 565f3be | 2012-02-10 15:28:31 +0900 | [diff] [blame] | 302 | |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 303 | kvm->mmu_notifier_seq++; |
Xiao Guangrong | a4ee1ca | 2010-11-23 11:13:00 +0800 | [diff] [blame] | 304 | need_tlb_flush = kvm_unmap_hva(kvm, address) | kvm->tlbs_dirty; |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 305 | /* we've to flush the tlb before the pages can be freed */ |
| 306 | if (need_tlb_flush) |
| 307 | kvm_flush_remote_tlbs(kvm); |
| 308 | |
Takuya Yoshikawa | 565f3be | 2012-02-10 15:28:31 +0900 | [diff] [blame] | 309 | spin_unlock(&kvm->mmu_lock); |
| 310 | srcu_read_unlock(&kvm->srcu, idx); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 311 | } |
| 312 | |
Izik Eidus | 3da0dd4 | 2009-09-23 21:47:18 +0300 | [diff] [blame] | 313 | static void kvm_mmu_notifier_change_pte(struct mmu_notifier *mn, |
| 314 | struct mm_struct *mm, |
| 315 | unsigned long address, |
| 316 | pte_t pte) |
| 317 | { |
| 318 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 319 | int idx; |
Izik Eidus | 3da0dd4 | 2009-09-23 21:47:18 +0300 | [diff] [blame] | 320 | |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 321 | idx = srcu_read_lock(&kvm->srcu); |
Izik Eidus | 3da0dd4 | 2009-09-23 21:47:18 +0300 | [diff] [blame] | 322 | spin_lock(&kvm->mmu_lock); |
| 323 | kvm->mmu_notifier_seq++; |
| 324 | kvm_set_spte_hva(kvm, address, pte); |
| 325 | spin_unlock(&kvm->mmu_lock); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 326 | srcu_read_unlock(&kvm->srcu, idx); |
Izik Eidus | 3da0dd4 | 2009-09-23 21:47:18 +0300 | [diff] [blame] | 327 | } |
| 328 | |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 329 | static void kvm_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn, |
| 330 | struct mm_struct *mm, |
| 331 | unsigned long start, |
| 332 | unsigned long end) |
| 333 | { |
| 334 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 335 | int need_tlb_flush = 0, idx; |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 336 | |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 337 | idx = srcu_read_lock(&kvm->srcu); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 338 | spin_lock(&kvm->mmu_lock); |
| 339 | /* |
| 340 | * The count increase must become visible at unlock time as no |
| 341 | * spte can be established without taking the mmu_lock and |
| 342 | * count is also read inside the mmu_lock critical section. |
| 343 | */ |
| 344 | kvm->mmu_notifier_count++; |
Takuya Yoshikawa | b3ae209 | 2012-07-02 17:56:33 +0900 | [diff] [blame] | 345 | need_tlb_flush = kvm_unmap_hva_range(kvm, start, end); |
Xiao Guangrong | a4ee1ca | 2010-11-23 11:13:00 +0800 | [diff] [blame] | 346 | need_tlb_flush |= kvm->tlbs_dirty; |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 347 | /* we've to flush the tlb before the pages can be freed */ |
| 348 | if (need_tlb_flush) |
| 349 | kvm_flush_remote_tlbs(kvm); |
Takuya Yoshikawa | 565f3be | 2012-02-10 15:28:31 +0900 | [diff] [blame] | 350 | |
| 351 | spin_unlock(&kvm->mmu_lock); |
| 352 | srcu_read_unlock(&kvm->srcu, idx); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 353 | } |
| 354 | |
| 355 | static void kvm_mmu_notifier_invalidate_range_end(struct mmu_notifier *mn, |
| 356 | struct mm_struct *mm, |
| 357 | unsigned long start, |
| 358 | unsigned long end) |
| 359 | { |
| 360 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
| 361 | |
| 362 | spin_lock(&kvm->mmu_lock); |
| 363 | /* |
| 364 | * This sequence increase will notify the kvm page fault that |
| 365 | * the page that is going to be mapped in the spte could have |
| 366 | * been freed. |
| 367 | */ |
| 368 | kvm->mmu_notifier_seq++; |
Paul Mackerras | a355aa5 | 2011-12-12 12:37:21 +0000 | [diff] [blame] | 369 | smp_wmb(); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 370 | /* |
| 371 | * The above sequence increase must be visible before the |
Paul Mackerras | a355aa5 | 2011-12-12 12:37:21 +0000 | [diff] [blame] | 372 | * below count decrease, which is ensured by the smp_wmb above |
| 373 | * in conjunction with the smp_rmb in mmu_notifier_retry(). |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 374 | */ |
| 375 | kvm->mmu_notifier_count--; |
| 376 | spin_unlock(&kvm->mmu_lock); |
| 377 | |
| 378 | BUG_ON(kvm->mmu_notifier_count < 0); |
| 379 | } |
| 380 | |
| 381 | static int kvm_mmu_notifier_clear_flush_young(struct mmu_notifier *mn, |
| 382 | struct mm_struct *mm, |
| 383 | unsigned long address) |
| 384 | { |
| 385 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 386 | int young, idx; |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 387 | |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 388 | idx = srcu_read_lock(&kvm->srcu); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 389 | spin_lock(&kvm->mmu_lock); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 390 | |
Takuya Yoshikawa | 565f3be | 2012-02-10 15:28:31 +0900 | [diff] [blame] | 391 | young = kvm_age_hva(kvm, address); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 392 | if (young) |
| 393 | kvm_flush_remote_tlbs(kvm); |
| 394 | |
Takuya Yoshikawa | 565f3be | 2012-02-10 15:28:31 +0900 | [diff] [blame] | 395 | spin_unlock(&kvm->mmu_lock); |
| 396 | srcu_read_unlock(&kvm->srcu, idx); |
| 397 | |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 398 | return young; |
| 399 | } |
| 400 | |
Andrea Arcangeli | 8ee5382 | 2011-01-13 15:47:10 -0800 | [diff] [blame] | 401 | static int kvm_mmu_notifier_test_young(struct mmu_notifier *mn, |
| 402 | struct mm_struct *mm, |
| 403 | unsigned long address) |
| 404 | { |
| 405 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
| 406 | int young, idx; |
| 407 | |
| 408 | idx = srcu_read_lock(&kvm->srcu); |
| 409 | spin_lock(&kvm->mmu_lock); |
| 410 | young = kvm_test_age_hva(kvm, address); |
| 411 | spin_unlock(&kvm->mmu_lock); |
| 412 | srcu_read_unlock(&kvm->srcu, idx); |
| 413 | |
| 414 | return young; |
| 415 | } |
| 416 | |
Marcelo Tosatti | 85db06e | 2008-12-10 21:23:26 +0100 | [diff] [blame] | 417 | static void kvm_mmu_notifier_release(struct mmu_notifier *mn, |
| 418 | struct mm_struct *mm) |
| 419 | { |
| 420 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
Lai Jiangshan | eda2bed | 2010-04-20 14:29:29 +0800 | [diff] [blame] | 421 | int idx; |
| 422 | |
| 423 | idx = srcu_read_lock(&kvm->srcu); |
Marcelo Tosatti | 2df72e9 | 2012-08-24 15:54:57 -0300 | [diff] [blame] | 424 | kvm_arch_flush_shadow_all(kvm); |
Lai Jiangshan | eda2bed | 2010-04-20 14:29:29 +0800 | [diff] [blame] | 425 | srcu_read_unlock(&kvm->srcu, idx); |
Marcelo Tosatti | 85db06e | 2008-12-10 21:23:26 +0100 | [diff] [blame] | 426 | } |
| 427 | |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 428 | static const struct mmu_notifier_ops kvm_mmu_notifier_ops = { |
| 429 | .invalidate_page = kvm_mmu_notifier_invalidate_page, |
| 430 | .invalidate_range_start = kvm_mmu_notifier_invalidate_range_start, |
| 431 | .invalidate_range_end = kvm_mmu_notifier_invalidate_range_end, |
| 432 | .clear_flush_young = kvm_mmu_notifier_clear_flush_young, |
Andrea Arcangeli | 8ee5382 | 2011-01-13 15:47:10 -0800 | [diff] [blame] | 433 | .test_young = kvm_mmu_notifier_test_young, |
Izik Eidus | 3da0dd4 | 2009-09-23 21:47:18 +0300 | [diff] [blame] | 434 | .change_pte = kvm_mmu_notifier_change_pte, |
Marcelo Tosatti | 85db06e | 2008-12-10 21:23:26 +0100 | [diff] [blame] | 435 | .release = kvm_mmu_notifier_release, |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 436 | }; |
Avi Kivity | 4c07b0a | 2009-12-20 14:54:04 +0200 | [diff] [blame] | 437 | |
| 438 | static int kvm_init_mmu_notifier(struct kvm *kvm) |
| 439 | { |
| 440 | kvm->mmu_notifier.ops = &kvm_mmu_notifier_ops; |
| 441 | return mmu_notifier_register(&kvm->mmu_notifier, current->mm); |
| 442 | } |
| 443 | |
| 444 | #else /* !(CONFIG_MMU_NOTIFIER && KVM_ARCH_WANT_MMU_NOTIFIER) */ |
| 445 | |
| 446 | static int kvm_init_mmu_notifier(struct kvm *kvm) |
| 447 | { |
| 448 | return 0; |
| 449 | } |
| 450 | |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 451 | #endif /* CONFIG_MMU_NOTIFIER && KVM_ARCH_WANT_MMU_NOTIFIER */ |
| 452 | |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 453 | static void kvm_init_memslots_id(struct kvm *kvm) |
| 454 | { |
| 455 | int i; |
| 456 | struct kvm_memslots *slots = kvm->memslots; |
| 457 | |
| 458 | for (i = 0; i < KVM_MEM_SLOTS_NUM; i++) |
Xiao Guangrong | f85e2cb | 2011-11-24 17:41:54 +0800 | [diff] [blame] | 459 | slots->id_to_index[i] = slots->memslots[i].id = i; |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 460 | } |
| 461 | |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 462 | static struct kvm *kvm_create_vm(unsigned long type) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 463 | { |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 464 | int r, i; |
| 465 | struct kvm *kvm = kvm_arch_alloc_vm(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 466 | |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 467 | if (!kvm) |
| 468 | return ERR_PTR(-ENOMEM); |
| 469 | |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 470 | r = kvm_arch_init_vm(kvm, type); |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 471 | if (r) |
| 472 | goto out_err_nodisable; |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 473 | |
| 474 | r = hardware_enable_all(); |
| 475 | if (r) |
| 476 | goto out_err_nodisable; |
| 477 | |
Avi Kivity | 75858a8 | 2009-01-04 17:10:50 +0200 | [diff] [blame] | 478 | #ifdef CONFIG_HAVE_KVM_IRQCHIP |
| 479 | INIT_HLIST_HEAD(&kvm->mask_notifier_list); |
Gleb Natapov | 136bdfe | 2009-08-24 11:54:23 +0300 | [diff] [blame] | 480 | INIT_HLIST_HEAD(&kvm->irq_ack_notifier_list); |
Avi Kivity | 75858a8 | 2009-01-04 17:10:50 +0200 | [diff] [blame] | 481 | #endif |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 482 | |
Alex Williamson | 1e702d9 | 2012-12-10 10:33:32 -0700 | [diff] [blame] | 483 | BUILD_BUG_ON(KVM_MEM_SLOTS_NUM > SHRT_MAX); |
| 484 | |
Marcelo Tosatti | 46a26bf | 2009-12-23 14:35:16 -0200 | [diff] [blame] | 485 | r = -ENOMEM; |
| 486 | kvm->memslots = kzalloc(sizeof(struct kvm_memslots), GFP_KERNEL); |
| 487 | if (!kvm->memslots) |
Jan Kiszka | 57e7fbe | 2010-11-09 12:42:12 +0100 | [diff] [blame] | 488 | goto out_err_nosrcu; |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 489 | kvm_init_memslots_id(kvm); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 490 | if (init_srcu_struct(&kvm->srcu)) |
Jan Kiszka | 57e7fbe | 2010-11-09 12:42:12 +0100 | [diff] [blame] | 491 | goto out_err_nosrcu; |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 492 | for (i = 0; i < KVM_NR_BUSES; i++) { |
| 493 | kvm->buses[i] = kzalloc(sizeof(struct kvm_io_bus), |
| 494 | GFP_KERNEL); |
Jan Kiszka | 57e7fbe | 2010-11-09 12:42:12 +0100 | [diff] [blame] | 495 | if (!kvm->buses[i]) |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 496 | goto out_err; |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 497 | } |
Mike Waychison | 74b5c5b | 2011-06-03 13:04:53 -0700 | [diff] [blame] | 498 | |
OGAWA Hirofumi | 85722cd | 2011-05-11 09:28:28 +0900 | [diff] [blame] | 499 | spin_lock_init(&kvm->mmu_lock); |
Avi Kivity | 6d4e4c4 | 2007-11-21 16:41:05 +0200 | [diff] [blame] | 500 | kvm->mm = current->mm; |
| 501 | atomic_inc(&kvm->mm->mm_count); |
Gregory Haskins | d34e6b1 | 2009-07-07 17:08:49 -0400 | [diff] [blame] | 502 | kvm_eventfd_init(kvm); |
Shaohua Li | 11ec280 | 2007-07-23 14:51:37 +0800 | [diff] [blame] | 503 | mutex_init(&kvm->lock); |
Marcelo Tosatti | 60eead7 | 2009-06-04 15:08:23 -0300 | [diff] [blame] | 504 | mutex_init(&kvm->irq_lock); |
Marcelo Tosatti | 79fac95 | 2009-12-23 14:35:26 -0200 | [diff] [blame] | 505 | mutex_init(&kvm->slots_lock); |
Izik Eidus | d39f13b | 2008-03-30 16:01:25 +0300 | [diff] [blame] | 506 | atomic_set(&kvm->users_count, 1); |
Mike Waychison | 74b5c5b | 2011-06-03 13:04:53 -0700 | [diff] [blame] | 507 | |
| 508 | r = kvm_init_mmu_notifier(kvm); |
| 509 | if (r) |
| 510 | goto out_err; |
| 511 | |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 512 | raw_spin_lock(&kvm_lock); |
Rusty Russell | 5e58cfe | 2007-07-23 17:08:21 +1000 | [diff] [blame] | 513 | list_add(&kvm->vm_list, &vm_list); |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 514 | raw_spin_unlock(&kvm_lock); |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 515 | |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 516 | return kvm; |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 517 | |
| 518 | out_err: |
Jan Kiszka | 57e7fbe | 2010-11-09 12:42:12 +0100 | [diff] [blame] | 519 | cleanup_srcu_struct(&kvm->srcu); |
| 520 | out_err_nosrcu: |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 521 | hardware_disable_all(); |
| 522 | out_err_nodisable: |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 523 | for (i = 0; i < KVM_NR_BUSES; i++) |
| 524 | kfree(kvm->buses[i]); |
Marcelo Tosatti | 46a26bf | 2009-12-23 14:35:16 -0200 | [diff] [blame] | 525 | kfree(kvm->memslots); |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 526 | kvm_arch_free_vm(kvm); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 527 | return ERR_PTR(r); |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 528 | } |
| 529 | |
Takuya Yoshikawa | 92eca8f | 2012-05-20 13:13:28 +0900 | [diff] [blame] | 530 | /* |
| 531 | * Avoid using vmalloc for a small buffer. |
| 532 | * Should not be used when the size is statically known. |
| 533 | */ |
Takuya Yoshikawa | c1a7b32 | 2012-05-20 13:15:07 +0900 | [diff] [blame] | 534 | void *kvm_kvzalloc(unsigned long size) |
Takuya Yoshikawa | 92eca8f | 2012-05-20 13:13:28 +0900 | [diff] [blame] | 535 | { |
| 536 | if (size > PAGE_SIZE) |
| 537 | return vzalloc(size); |
| 538 | else |
| 539 | return kzalloc(size, GFP_KERNEL); |
| 540 | } |
| 541 | |
Takuya Yoshikawa | c1a7b32 | 2012-05-20 13:15:07 +0900 | [diff] [blame] | 542 | void kvm_kvfree(const void *addr) |
Takuya Yoshikawa | 92eca8f | 2012-05-20 13:13:28 +0900 | [diff] [blame] | 543 | { |
| 544 | if (is_vmalloc_addr(addr)) |
| 545 | vfree(addr); |
| 546 | else |
| 547 | kfree(addr); |
| 548 | } |
| 549 | |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 550 | static void kvm_destroy_dirty_bitmap(struct kvm_memory_slot *memslot) |
| 551 | { |
| 552 | if (!memslot->dirty_bitmap) |
| 553 | return; |
| 554 | |
Takuya Yoshikawa | 92eca8f | 2012-05-20 13:13:28 +0900 | [diff] [blame] | 555 | kvm_kvfree(memslot->dirty_bitmap); |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 556 | memslot->dirty_bitmap = NULL; |
| 557 | } |
| 558 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 559 | /* |
| 560 | * Free any memory in @free but not in @dont. |
| 561 | */ |
| 562 | static void kvm_free_physmem_slot(struct kvm_memory_slot *free, |
| 563 | struct kvm_memory_slot *dont) |
| 564 | { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 565 | if (!dont || free->dirty_bitmap != dont->dirty_bitmap) |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 566 | kvm_destroy_dirty_bitmap(free); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 567 | |
Takuya Yoshikawa | db3fe4e | 2012-02-08 13:02:18 +0900 | [diff] [blame] | 568 | kvm_arch_free_memslot(free, dont); |
Marcelo Tosatti | 05da455 | 2008-02-23 11:44:30 -0300 | [diff] [blame] | 569 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 570 | free->npages = 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 571 | } |
| 572 | |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 573 | void kvm_free_physmem(struct kvm *kvm) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 574 | { |
Marcelo Tosatti | 46a26bf | 2009-12-23 14:35:16 -0200 | [diff] [blame] | 575 | struct kvm_memslots *slots = kvm->memslots; |
Xiao Guangrong | be6ba0f | 2011-11-24 17:39:18 +0800 | [diff] [blame] | 576 | struct kvm_memory_slot *memslot; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 577 | |
Xiao Guangrong | be6ba0f | 2011-11-24 17:39:18 +0800 | [diff] [blame] | 578 | kvm_for_each_memslot(memslot, slots) |
| 579 | kvm_free_physmem_slot(memslot, NULL); |
Marcelo Tosatti | 46a26bf | 2009-12-23 14:35:16 -0200 | [diff] [blame] | 580 | |
| 581 | kfree(kvm->memslots); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 582 | } |
| 583 | |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 584 | static void kvm_destroy_vm(struct kvm *kvm) |
| 585 | { |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 586 | int i; |
Avi Kivity | 6d4e4c4 | 2007-11-21 16:41:05 +0200 | [diff] [blame] | 587 | struct mm_struct *mm = kvm->mm; |
| 588 | |
Sheng Yang | ad8ba2c | 2009-01-06 10:03:02 +0800 | [diff] [blame] | 589 | kvm_arch_sync_events(kvm); |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 590 | raw_spin_lock(&kvm_lock); |
Avi Kivity | 133de90 | 2007-02-12 00:54:44 -0800 | [diff] [blame] | 591 | list_del(&kvm->vm_list); |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 592 | raw_spin_unlock(&kvm_lock); |
Avi Kivity | 399ec80 | 2008-11-19 13:58:46 +0200 | [diff] [blame] | 593 | kvm_free_irq_routing(kvm); |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 594 | for (i = 0; i < KVM_NR_BUSES; i++) |
| 595 | kvm_io_bus_destroy(kvm->buses[i]); |
Avi Kivity | 980da6c | 2009-12-20 15:13:43 +0200 | [diff] [blame] | 596 | kvm_coalesced_mmio_free(kvm); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 597 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) |
| 598 | mmu_notifier_unregister(&kvm->mmu_notifier, kvm->mm); |
Gleb Natapov | f00be0c | 2009-03-19 12:20:36 +0200 | [diff] [blame] | 599 | #else |
Marcelo Tosatti | 2df72e9 | 2012-08-24 15:54:57 -0300 | [diff] [blame] | 600 | kvm_arch_flush_shadow_all(kvm); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 601 | #endif |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 602 | kvm_arch_destroy_vm(kvm); |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 603 | kvm_free_physmem(kvm); |
| 604 | cleanup_srcu_struct(&kvm->srcu); |
| 605 | kvm_arch_free_vm(kvm); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 606 | hardware_disable_all(); |
Avi Kivity | 6d4e4c4 | 2007-11-21 16:41:05 +0200 | [diff] [blame] | 607 | mmdrop(mm); |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 608 | } |
| 609 | |
Izik Eidus | d39f13b | 2008-03-30 16:01:25 +0300 | [diff] [blame] | 610 | void kvm_get_kvm(struct kvm *kvm) |
| 611 | { |
| 612 | atomic_inc(&kvm->users_count); |
| 613 | } |
| 614 | EXPORT_SYMBOL_GPL(kvm_get_kvm); |
| 615 | |
| 616 | void kvm_put_kvm(struct kvm *kvm) |
| 617 | { |
| 618 | if (atomic_dec_and_test(&kvm->users_count)) |
| 619 | kvm_destroy_vm(kvm); |
| 620 | } |
| 621 | EXPORT_SYMBOL_GPL(kvm_put_kvm); |
| 622 | |
| 623 | |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 624 | static int kvm_vm_release(struct inode *inode, struct file *filp) |
| 625 | { |
| 626 | struct kvm *kvm = filp->private_data; |
| 627 | |
Gregory Haskins | 721eecb | 2009-05-20 10:30:49 -0400 | [diff] [blame] | 628 | kvm_irqfd_release(kvm); |
| 629 | |
Izik Eidus | d39f13b | 2008-03-30 16:01:25 +0300 | [diff] [blame] | 630 | kvm_put_kvm(kvm); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 631 | return 0; |
| 632 | } |
| 633 | |
Takuya Yoshikawa | 515a012 | 2010-10-27 18:23:54 +0900 | [diff] [blame] | 634 | /* |
| 635 | * Allocation size is twice as large as the actual dirty bitmap size. |
Takuya Yoshikawa | 93474b2 | 2012-03-01 19:34:45 +0900 | [diff] [blame] | 636 | * 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] | 637 | */ |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 638 | static int kvm_create_dirty_bitmap(struct kvm_memory_slot *memslot) |
| 639 | { |
Takuya Yoshikawa | 189a2f7 | 2012-02-08 13:01:09 +0900 | [diff] [blame] | 640 | #ifndef CONFIG_S390 |
Takuya Yoshikawa | 515a012 | 2010-10-27 18:23:54 +0900 | [diff] [blame] | 641 | unsigned long dirty_bytes = 2 * kvm_dirty_bitmap_bytes(memslot); |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 642 | |
Takuya Yoshikawa | 92eca8f | 2012-05-20 13:13:28 +0900 | [diff] [blame] | 643 | memslot->dirty_bitmap = kvm_kvzalloc(dirty_bytes); |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 644 | if (!memslot->dirty_bitmap) |
| 645 | return -ENOMEM; |
| 646 | |
Takuya Yoshikawa | 189a2f7 | 2012-02-08 13:01:09 +0900 | [diff] [blame] | 647 | #endif /* !CONFIG_S390 */ |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 648 | return 0; |
| 649 | } |
| 650 | |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 651 | static int cmp_memslot(const void *slot1, const void *slot2) |
| 652 | { |
| 653 | struct kvm_memory_slot *s1, *s2; |
| 654 | |
| 655 | s1 = (struct kvm_memory_slot *)slot1; |
| 656 | s2 = (struct kvm_memory_slot *)slot2; |
| 657 | |
| 658 | if (s1->npages < s2->npages) |
| 659 | return 1; |
| 660 | if (s1->npages > s2->npages) |
| 661 | return -1; |
| 662 | |
| 663 | return 0; |
| 664 | } |
| 665 | |
| 666 | /* |
| 667 | * Sort the memslots base on its size, so the larger slots |
| 668 | * will get better fit. |
| 669 | */ |
| 670 | static void sort_memslots(struct kvm_memslots *slots) |
| 671 | { |
Xiao Guangrong | f85e2cb | 2011-11-24 17:41:54 +0800 | [diff] [blame] | 672 | int i; |
| 673 | |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 674 | sort(slots->memslots, KVM_MEM_SLOTS_NUM, |
| 675 | sizeof(struct kvm_memory_slot), cmp_memslot, NULL); |
Xiao Guangrong | f85e2cb | 2011-11-24 17:41:54 +0800 | [diff] [blame] | 676 | |
| 677 | for (i = 0; i < KVM_MEM_SLOTS_NUM; i++) |
| 678 | slots->id_to_index[slots->memslots[i].id] = i; |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 679 | } |
| 680 | |
Alex Williamson | 116c14c | 2012-12-21 08:20:16 -0700 | [diff] [blame] | 681 | void update_memslots(struct kvm_memslots *slots, struct kvm_memory_slot *new, |
| 682 | u64 last_generation) |
Xiao Guangrong | be593d6 | 2011-11-24 17:38:24 +0800 | [diff] [blame] | 683 | { |
| 684 | if (new) { |
| 685 | int id = new->id; |
Xiao Guangrong | 28a3754 | 2011-11-24 19:04:35 +0800 | [diff] [blame] | 686 | struct kvm_memory_slot *old = id_to_memslot(slots, id); |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 687 | unsigned long npages = old->npages; |
Xiao Guangrong | be593d6 | 2011-11-24 17:38:24 +0800 | [diff] [blame] | 688 | |
Xiao Guangrong | 28a3754 | 2011-11-24 19:04:35 +0800 | [diff] [blame] | 689 | *old = *new; |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 690 | if (new->npages != npages) |
| 691 | sort_memslots(slots); |
Xiao Guangrong | be593d6 | 2011-11-24 17:38:24 +0800 | [diff] [blame] | 692 | } |
| 693 | |
Alex Williamson | 116c14c | 2012-12-21 08:20:16 -0700 | [diff] [blame] | 694 | slots->generation = last_generation + 1; |
Xiao Guangrong | be593d6 | 2011-11-24 17:38:24 +0800 | [diff] [blame] | 695 | } |
| 696 | |
Xiao Guangrong | a50d64d | 2012-08-21 10:58:13 +0800 | [diff] [blame] | 697 | static int check_memory_region_flags(struct kvm_userspace_memory_region *mem) |
| 698 | { |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 699 | u32 valid_flags = KVM_MEM_LOG_DIRTY_PAGES; |
| 700 | |
| 701 | #ifdef KVM_CAP_READONLY_MEM |
| 702 | valid_flags |= KVM_MEM_READONLY; |
| 703 | #endif |
| 704 | |
| 705 | if (mem->flags & ~valid_flags) |
Xiao Guangrong | a50d64d | 2012-08-21 10:58:13 +0800 | [diff] [blame] | 706 | return -EINVAL; |
| 707 | |
| 708 | return 0; |
| 709 | } |
| 710 | |
Gleb Natapov | 7ec4fb4 | 2012-12-24 17:49:30 +0200 | [diff] [blame] | 711 | static struct kvm_memslots *install_new_memslots(struct kvm *kvm, |
| 712 | struct kvm_memslots *slots, struct kvm_memory_slot *new) |
| 713 | { |
| 714 | struct kvm_memslots *old_memslots = kvm->memslots; |
| 715 | |
| 716 | update_memslots(slots, new, kvm->memslots->generation); |
| 717 | rcu_assign_pointer(kvm->memslots, slots); |
| 718 | synchronize_srcu_expedited(&kvm->srcu); |
| 719 | return old_memslots; |
| 720 | } |
| 721 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 722 | /* |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 723 | * Allocate some memory and give it an address in the guest physical address |
| 724 | * space. |
| 725 | * |
| 726 | * Discontiguous memory is allowed, mostly for framebuffers. |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 727 | * |
Marcelo Tosatti | 10589a4 | 2007-12-20 19:18:22 -0500 | [diff] [blame] | 728 | * Must be called holding mmap_sem for write. |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 729 | */ |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 730 | int __kvm_set_memory_region(struct kvm *kvm, |
Takuya Yoshikawa | 47ae31e | 2013-02-27 19:43:00 +0900 | [diff] [blame] | 731 | struct kvm_userspace_memory_region *mem) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 732 | { |
Avi Kivity | 8234b22 | 2010-12-27 12:08:45 +0200 | [diff] [blame] | 733 | int r; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 734 | gfn_t base_gfn; |
Heiko Carstens | 28bcb11 | 2009-09-03 17:35:35 +0200 | [diff] [blame] | 735 | unsigned long npages; |
Takuya Yoshikawa | a843fac | 2013-01-11 18:27:43 +0900 | [diff] [blame] | 736 | struct kvm_memory_slot *slot; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 737 | struct kvm_memory_slot old, new; |
Alex Williamson | b7f69c5 | 2012-12-10 10:33:03 -0700 | [diff] [blame] | 738 | struct kvm_memslots *slots = NULL, *old_memslots; |
Takuya Yoshikawa | f64c039 | 2013-01-29 11:00:07 +0900 | [diff] [blame] | 739 | enum kvm_mr_change change; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 740 | |
Xiao Guangrong | a50d64d | 2012-08-21 10:58:13 +0800 | [diff] [blame] | 741 | r = check_memory_region_flags(mem); |
| 742 | if (r) |
| 743 | goto out; |
| 744 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 745 | r = -EINVAL; |
| 746 | /* General sanity checks */ |
| 747 | if (mem->memory_size & (PAGE_SIZE - 1)) |
| 748 | goto out; |
| 749 | if (mem->guest_phys_addr & (PAGE_SIZE - 1)) |
| 750 | goto out; |
Takuya Yoshikawa | fa3d315 | 2011-05-07 16:35:38 +0900 | [diff] [blame] | 751 | /* We can read the guest memory with __xxx_user() later on. */ |
Takuya Yoshikawa | 47ae31e | 2013-02-27 19:43:00 +0900 | [diff] [blame] | 752 | if ((mem->slot < KVM_USER_MEM_SLOTS) && |
Takuya Yoshikawa | fa3d315 | 2011-05-07 16:35:38 +0900 | [diff] [blame] | 753 | ((mem->userspace_addr & (PAGE_SIZE - 1)) || |
Heiko Carstens | 9e3bb6b | 2011-05-24 07:51:27 +0200 | [diff] [blame] | 754 | !access_ok(VERIFY_WRITE, |
| 755 | (void __user *)(unsigned long)mem->userspace_addr, |
| 756 | mem->memory_size))) |
Hollis Blanchard | 7874980 | 2008-11-07 13:32:12 -0600 | [diff] [blame] | 757 | goto out; |
Xiao Guangrong | 93a5cef | 2011-11-24 17:37:48 +0800 | [diff] [blame] | 758 | if (mem->slot >= KVM_MEM_SLOTS_NUM) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 759 | goto out; |
| 760 | if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr) |
| 761 | goto out; |
| 762 | |
Takuya Yoshikawa | a843fac | 2013-01-11 18:27:43 +0900 | [diff] [blame] | 763 | slot = id_to_memslot(kvm->memslots, mem->slot); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 764 | base_gfn = mem->guest_phys_addr >> PAGE_SHIFT; |
| 765 | npages = mem->memory_size >> PAGE_SHIFT; |
| 766 | |
Takuya Yoshikawa | 660c22c | 2010-04-13 22:47:24 +0900 | [diff] [blame] | 767 | r = -EINVAL; |
| 768 | if (npages > KVM_MEM_MAX_NR_PAGES) |
| 769 | goto out; |
| 770 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 771 | if (!npages) |
| 772 | mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES; |
| 773 | |
Takuya Yoshikawa | a843fac | 2013-01-11 18:27:43 +0900 | [diff] [blame] | 774 | new = old = *slot; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 775 | |
Avi Kivity | e36d96f | 2010-06-21 10:56:36 +0300 | [diff] [blame] | 776 | new.id = mem->slot; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 777 | new.base_gfn = base_gfn; |
| 778 | new.npages = npages; |
| 779 | new.flags = mem->flags; |
| 780 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 781 | r = -EINVAL; |
Takuya Yoshikawa | f64c039 | 2013-01-29 11:00:07 +0900 | [diff] [blame] | 782 | if (npages) { |
| 783 | if (!old.npages) |
| 784 | change = KVM_MR_CREATE; |
| 785 | else { /* Modify an existing slot. */ |
| 786 | if ((mem->userspace_addr != old.userspace_addr) || |
Takuya Yoshikawa | 75d61fb | 2013-01-30 19:40:41 +0900 | [diff] [blame] | 787 | (npages != old.npages) || |
| 788 | ((new.flags ^ old.flags) & KVM_MEM_READONLY)) |
Takuya Yoshikawa | f64c039 | 2013-01-29 11:00:07 +0900 | [diff] [blame] | 789 | goto out; |
| 790 | |
| 791 | if (base_gfn != old.base_gfn) |
| 792 | change = KVM_MR_MOVE; |
| 793 | else if (new.flags != old.flags) |
| 794 | change = KVM_MR_FLAGS_ONLY; |
| 795 | else { /* Nothing to change. */ |
| 796 | r = 0; |
| 797 | goto out; |
| 798 | } |
| 799 | } |
| 800 | } else if (old.npages) { |
| 801 | change = KVM_MR_DELETE; |
| 802 | } else /* Modify a non-existent slot: disallowed. */ |
Takuya Yoshikawa | 0ea75e1 | 2013-01-11 18:26:10 +0900 | [diff] [blame] | 803 | goto out; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 804 | |
Takuya Yoshikawa | f64c039 | 2013-01-29 11:00:07 +0900 | [diff] [blame] | 805 | if ((change == KVM_MR_CREATE) || (change == KVM_MR_MOVE)) { |
Takuya Yoshikawa | 0a706be | 2013-01-11 18:26:55 +0900 | [diff] [blame] | 806 | /* Check for overlaps */ |
| 807 | r = -EEXIST; |
| 808 | kvm_for_each_memslot(slot, kvm->memslots) { |
Takuya Yoshikawa | a843fac | 2013-01-11 18:27:43 +0900 | [diff] [blame] | 809 | if ((slot->id >= KVM_USER_MEM_SLOTS) || |
| 810 | (slot->id == mem->slot)) |
Takuya Yoshikawa | 0a706be | 2013-01-11 18:26:55 +0900 | [diff] [blame] | 811 | continue; |
| 812 | if (!((base_gfn + npages <= slot->base_gfn) || |
| 813 | (base_gfn >= slot->base_gfn + slot->npages))) |
| 814 | goto out; |
| 815 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 816 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 817 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 818 | /* Free page dirty bitmap if unneeded */ |
| 819 | if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES)) |
Al Viro | 8b6d44c | 2007-02-09 16:38:40 +0000 | [diff] [blame] | 820 | new.dirty_bitmap = NULL; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 821 | |
| 822 | r = -ENOMEM; |
Takuya Yoshikawa | f64c039 | 2013-01-29 11:00:07 +0900 | [diff] [blame] | 823 | if (change == KVM_MR_CREATE) { |
Takuya Yoshikawa | 189a2f7 | 2012-02-08 13:01:09 +0900 | [diff] [blame] | 824 | new.userspace_addr = mem->userspace_addr; |
Takuya Yoshikawa | d89cc61 | 2012-08-01 18:03:28 +0900 | [diff] [blame] | 825 | |
Takuya Yoshikawa | db3fe4e | 2012-02-08 13:02:18 +0900 | [diff] [blame] | 826 | if (kvm_arch_create_memslot(&new, npages)) |
| 827 | goto out_free; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 828 | } |
Joerg Roedel | ec04b26 | 2009-06-19 15:16:23 +0200 | [diff] [blame] | 829 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 830 | /* Allocate page dirty bitmap if needed */ |
| 831 | if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) { |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 832 | if (kvm_create_dirty_bitmap(&new) < 0) |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 833 | goto out_free; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 834 | } |
| 835 | |
Takuya Yoshikawa | f64c039 | 2013-01-29 11:00:07 +0900 | [diff] [blame] | 836 | if ((change == KVM_MR_DELETE) || (change == KVM_MR_MOVE)) { |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 837 | r = -ENOMEM; |
Thomas Meyer | 6da64fd | 2011-11-08 20:32:19 +0100 | [diff] [blame] | 838 | slots = kmemdup(kvm->memslots, sizeof(struct kvm_memslots), |
| 839 | GFP_KERNEL); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 840 | if (!slots) |
| 841 | goto out_free; |
Xiao Guangrong | 28a3754 | 2011-11-24 19:04:35 +0800 | [diff] [blame] | 842 | slot = id_to_memslot(slots, mem->slot); |
| 843 | slot->flags |= KVM_MEMSLOT_INVALID; |
| 844 | |
Gleb Natapov | 7ec4fb4 | 2012-12-24 17:49:30 +0200 | [diff] [blame] | 845 | old_memslots = install_new_memslots(kvm, slots, NULL); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 846 | |
Alex Williamson | e40f193 | 2012-12-10 10:32:57 -0700 | [diff] [blame] | 847 | /* slot was deleted or moved, clear iommu mapping */ |
| 848 | kvm_iommu_unmap_pages(kvm, &old); |
Marcelo Tosatti | 12d6e75 | 2012-08-24 15:54:58 -0300 | [diff] [blame] | 849 | /* From this point no new shadow pages pointing to a deleted, |
| 850 | * or moved, memslot will be created. |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 851 | * |
| 852 | * validation of sp->gfn happens in: |
| 853 | * - gfn_to_hva (kvm_read_guest, gfn_to_pfn) |
| 854 | * - kvm_is_visible_gfn (mmu_check_roots) |
| 855 | */ |
Marcelo Tosatti | 2df72e9 | 2012-08-24 15:54:57 -0300 | [diff] [blame] | 856 | kvm_arch_flush_shadow_memslot(kvm, slot); |
Alex Williamson | b7f69c5 | 2012-12-10 10:33:03 -0700 | [diff] [blame] | 857 | slots = old_memslots; |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 858 | } |
Marcelo Tosatti | 34d4cb8 | 2008-07-10 20:49:31 -0300 | [diff] [blame] | 859 | |
Takuya Yoshikawa | 7b6195a | 2013-02-27 19:44:34 +0900 | [diff] [blame] | 860 | r = kvm_arch_prepare_memory_region(kvm, &new, mem, change); |
Marcelo Tosatti | f7784b8 | 2009-12-23 14:35:18 -0200 | [diff] [blame] | 861 | if (r) |
Alex Williamson | b7f69c5 | 2012-12-10 10:33:03 -0700 | [diff] [blame] | 862 | goto out_slots; |
Marcelo Tosatti | f7784b8 | 2009-12-23 14:35:18 -0200 | [diff] [blame] | 863 | |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 864 | r = -ENOMEM; |
Alex Williamson | b7f69c5 | 2012-12-10 10:33:03 -0700 | [diff] [blame] | 865 | /* |
| 866 | * We can re-use the old_memslots from above, the only difference |
| 867 | * from the currently installed memslots is the invalid flag. This |
| 868 | * will get overwritten by update_memslots anyway. |
| 869 | */ |
| 870 | if (!slots) { |
| 871 | slots = kmemdup(kvm->memslots, sizeof(struct kvm_memslots), |
| 872 | GFP_KERNEL); |
| 873 | if (!slots) |
| 874 | goto out_free; |
| 875 | } |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 876 | |
Alex Williamson | 261874b | 2013-01-24 15:04:03 -0700 | [diff] [blame] | 877 | /* |
| 878 | * IOMMU mapping: New slots need to be mapped. Old slots need to be |
Takuya Yoshikawa | 75d61fb | 2013-01-30 19:40:41 +0900 | [diff] [blame] | 879 | * un-mapped and re-mapped if their base changes. Since base change |
| 880 | * unmapping is handled above with slot deletion, mapping alone is |
| 881 | * needed here. Anything else the iommu might care about for existing |
| 882 | * slots (size changes, userspace addr changes and read-only flag |
| 883 | * changes) is disallowed above, so any other attribute changes getting |
| 884 | * here can be skipped. |
Alex Williamson | 261874b | 2013-01-24 15:04:03 -0700 | [diff] [blame] | 885 | */ |
Takuya Yoshikawa | 75d61fb | 2013-01-30 19:40:41 +0900 | [diff] [blame] | 886 | if ((change == KVM_MR_CREATE) || (change == KVM_MR_MOVE)) { |
| 887 | r = kvm_iommu_map_pages(kvm, &new); |
| 888 | if (r) |
| 889 | goto out_slots; |
Alex Williamson | e40f193 | 2012-12-10 10:32:57 -0700 | [diff] [blame] | 890 | } |
| 891 | |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 892 | /* actual memory is freed via old in kvm_free_physmem_slot below */ |
Takuya Yoshikawa | f64c039 | 2013-01-29 11:00:07 +0900 | [diff] [blame] | 893 | if (change == KVM_MR_DELETE) { |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 894 | new.dirty_bitmap = NULL; |
Takuya Yoshikawa | db3fe4e | 2012-02-08 13:02:18 +0900 | [diff] [blame] | 895 | memset(&new.arch, 0, sizeof(new.arch)); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 896 | } |
| 897 | |
Gleb Natapov | 7ec4fb4 | 2012-12-24 17:49:30 +0200 | [diff] [blame] | 898 | old_memslots = install_new_memslots(kvm, slots, &new); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 899 | |
Takuya Yoshikawa | 8482644 | 2013-02-27 19:45:25 +0900 | [diff] [blame] | 900 | kvm_arch_commit_memory_region(kvm, mem, &old, change); |
Zhang Xiantao | 3ad82a7 | 2007-11-20 13:11:38 +0800 | [diff] [blame] | 901 | |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 902 | kvm_free_physmem_slot(&old, &new); |
| 903 | kfree(old_memslots); |
| 904 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 905 | return 0; |
| 906 | |
Alex Williamson | e40f193 | 2012-12-10 10:32:57 -0700 | [diff] [blame] | 907 | out_slots: |
| 908 | kfree(slots); |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 909 | out_free: |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 910 | kvm_free_physmem_slot(&new, &old); |
| 911 | out: |
| 912 | return r; |
Izik Eidus | 210c7c4 | 2007-10-24 23:52:57 +0200 | [diff] [blame] | 913 | } |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 914 | EXPORT_SYMBOL_GPL(__kvm_set_memory_region); |
| 915 | |
| 916 | int kvm_set_memory_region(struct kvm *kvm, |
Takuya Yoshikawa | 47ae31e | 2013-02-27 19:43:00 +0900 | [diff] [blame] | 917 | struct kvm_userspace_memory_region *mem) |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 918 | { |
| 919 | int r; |
| 920 | |
Marcelo Tosatti | 79fac95 | 2009-12-23 14:35:26 -0200 | [diff] [blame] | 921 | mutex_lock(&kvm->slots_lock); |
Takuya Yoshikawa | 47ae31e | 2013-02-27 19:43:00 +0900 | [diff] [blame] | 922 | r = __kvm_set_memory_region(kvm, mem); |
Marcelo Tosatti | 79fac95 | 2009-12-23 14:35:26 -0200 | [diff] [blame] | 923 | mutex_unlock(&kvm->slots_lock); |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 924 | return r; |
| 925 | } |
Izik Eidus | 210c7c4 | 2007-10-24 23:52:57 +0200 | [diff] [blame] | 926 | EXPORT_SYMBOL_GPL(kvm_set_memory_region); |
| 927 | |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 928 | int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, |
Takuya Yoshikawa | 47ae31e | 2013-02-27 19:43:00 +0900 | [diff] [blame] | 929 | struct kvm_userspace_memory_region *mem) |
Izik Eidus | 210c7c4 | 2007-10-24 23:52:57 +0200 | [diff] [blame] | 930 | { |
Alex Williamson | bbacc0c | 2012-12-10 10:33:09 -0700 | [diff] [blame] | 931 | if (mem->slot >= KVM_USER_MEM_SLOTS) |
Izik Eidus | e0d62c7 | 2007-10-24 23:57:46 +0200 | [diff] [blame] | 932 | return -EINVAL; |
Takuya Yoshikawa | 47ae31e | 2013-02-27 19:43:00 +0900 | [diff] [blame] | 933 | return kvm_set_memory_region(kvm, mem); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 934 | } |
| 935 | |
Zhang Xiantao | 5bb064d | 2007-11-18 20:29:43 +0800 | [diff] [blame] | 936 | int kvm_get_dirty_log(struct kvm *kvm, |
| 937 | struct kvm_dirty_log *log, int *is_dirty) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 938 | { |
| 939 | struct kvm_memory_slot *memslot; |
| 940 | int r, i; |
Takuya Yoshikawa | 87bf6e7 | 2010-04-12 19:35:35 +0900 | [diff] [blame] | 941 | unsigned long n; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 942 | unsigned long any = 0; |
| 943 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 944 | r = -EINVAL; |
Alex Williamson | bbacc0c | 2012-12-10 10:33:09 -0700 | [diff] [blame] | 945 | if (log->slot >= KVM_USER_MEM_SLOTS) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 946 | goto out; |
| 947 | |
Xiao Guangrong | 28a3754 | 2011-11-24 19:04:35 +0800 | [diff] [blame] | 948 | memslot = id_to_memslot(kvm->memslots, log->slot); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 949 | r = -ENOENT; |
| 950 | if (!memslot->dirty_bitmap) |
| 951 | goto out; |
| 952 | |
Takuya Yoshikawa | 87bf6e7 | 2010-04-12 19:35:35 +0900 | [diff] [blame] | 953 | n = kvm_dirty_bitmap_bytes(memslot); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 954 | |
Uri Lublin | cd1a4a9 | 2007-02-22 16:43:09 +0200 | [diff] [blame] | 955 | for (i = 0; !any && i < n/sizeof(long); ++i) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 956 | any = memslot->dirty_bitmap[i]; |
| 957 | |
| 958 | r = -EFAULT; |
| 959 | if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n)) |
| 960 | goto out; |
| 961 | |
Zhang Xiantao | 5bb064d | 2007-11-18 20:29:43 +0800 | [diff] [blame] | 962 | if (any) |
| 963 | *is_dirty = 1; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 964 | |
| 965 | r = 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 966 | out: |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 967 | return r; |
| 968 | } |
| 969 | |
Takuya Yoshikawa | db3fe4e | 2012-02-08 13:02:18 +0900 | [diff] [blame] | 970 | bool kvm_largepages_enabled(void) |
| 971 | { |
| 972 | return largepages_enabled; |
| 973 | } |
| 974 | |
Marcelo Tosatti | 54dee99 | 2009-06-11 12:07:44 -0300 | [diff] [blame] | 975 | void kvm_disable_largepages(void) |
| 976 | { |
| 977 | largepages_enabled = false; |
| 978 | } |
| 979 | EXPORT_SYMBOL_GPL(kvm_disable_largepages); |
| 980 | |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 981 | struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn) |
| 982 | { |
| 983 | return __gfn_to_memslot(kvm_memslots(kvm), gfn); |
| 984 | } |
Avi Kivity | a1f4d395 | 2010-06-21 11:44:20 +0300 | [diff] [blame] | 985 | EXPORT_SYMBOL_GPL(gfn_to_memslot); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 986 | |
Izik Eidus | e0d62c7 | 2007-10-24 23:57:46 +0200 | [diff] [blame] | 987 | int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn) |
| 988 | { |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 989 | struct kvm_memory_slot *memslot = gfn_to_memslot(kvm, gfn); |
Izik Eidus | e0d62c7 | 2007-10-24 23:57:46 +0200 | [diff] [blame] | 990 | |
Alex Williamson | bbacc0c | 2012-12-10 10:33:09 -0700 | [diff] [blame] | 991 | if (!memslot || memslot->id >= KVM_USER_MEM_SLOTS || |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 992 | memslot->flags & KVM_MEMSLOT_INVALID) |
| 993 | return 0; |
Izik Eidus | e0d62c7 | 2007-10-24 23:57:46 +0200 | [diff] [blame] | 994 | |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 995 | return 1; |
Izik Eidus | e0d62c7 | 2007-10-24 23:57:46 +0200 | [diff] [blame] | 996 | } |
| 997 | EXPORT_SYMBOL_GPL(kvm_is_visible_gfn); |
| 998 | |
Joerg Roedel | 8f0b1ab | 2010-01-28 12:37:56 +0100 | [diff] [blame] | 999 | unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn) |
| 1000 | { |
| 1001 | struct vm_area_struct *vma; |
| 1002 | unsigned long addr, size; |
| 1003 | |
| 1004 | size = PAGE_SIZE; |
| 1005 | |
| 1006 | addr = gfn_to_hva(kvm, gfn); |
| 1007 | if (kvm_is_error_hva(addr)) |
| 1008 | return PAGE_SIZE; |
| 1009 | |
| 1010 | down_read(¤t->mm->mmap_sem); |
| 1011 | vma = find_vma(current->mm, addr); |
| 1012 | if (!vma) |
| 1013 | goto out; |
| 1014 | |
| 1015 | size = vma_kernel_pagesize(vma); |
| 1016 | |
| 1017 | out: |
| 1018 | up_read(¤t->mm->mmap_sem); |
| 1019 | |
| 1020 | return size; |
| 1021 | } |
| 1022 | |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1023 | static bool memslot_is_readonly(struct kvm_memory_slot *slot) |
| 1024 | { |
| 1025 | return slot->flags & KVM_MEM_READONLY; |
| 1026 | } |
| 1027 | |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1028 | static unsigned long __gfn_to_hva_many(struct kvm_memory_slot *slot, gfn_t gfn, |
| 1029 | gfn_t *nr_pages, bool write) |
Izik Eidus | 539cb66 | 2007-11-11 22:05:04 +0200 | [diff] [blame] | 1030 | { |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 1031 | if (!slot || slot->flags & KVM_MEMSLOT_INVALID) |
Xiao Guangrong | ca3a490 | 2012-08-21 11:01:50 +0800 | [diff] [blame] | 1032 | return KVM_HVA_ERR_BAD; |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 1033 | |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1034 | if (memslot_is_readonly(slot) && write) |
| 1035 | return KVM_HVA_ERR_RO_BAD; |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 1036 | |
| 1037 | if (nr_pages) |
| 1038 | *nr_pages = slot->npages - (gfn - slot->base_gfn); |
| 1039 | |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1040 | return __gfn_to_hva_memslot(slot, gfn); |
Izik Eidus | 539cb66 | 2007-11-11 22:05:04 +0200 | [diff] [blame] | 1041 | } |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 1042 | |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1043 | static unsigned long gfn_to_hva_many(struct kvm_memory_slot *slot, gfn_t gfn, |
| 1044 | gfn_t *nr_pages) |
| 1045 | { |
| 1046 | return __gfn_to_hva_many(slot, gfn, nr_pages, true); |
| 1047 | } |
| 1048 | |
| 1049 | unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, |
| 1050 | gfn_t gfn) |
| 1051 | { |
| 1052 | return gfn_to_hva_many(slot, gfn, NULL); |
| 1053 | } |
| 1054 | EXPORT_SYMBOL_GPL(gfn_to_hva_memslot); |
| 1055 | |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 1056 | unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn) |
| 1057 | { |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1058 | return gfn_to_hva_many(gfn_to_memslot(kvm, gfn), gfn, NULL); |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 1059 | } |
Sheng Yang | 0d15029 | 2008-04-25 21:44:50 +0800 | [diff] [blame] | 1060 | EXPORT_SYMBOL_GPL(gfn_to_hva); |
Izik Eidus | 539cb66 | 2007-11-11 22:05:04 +0200 | [diff] [blame] | 1061 | |
Xiao Guangrong | 86ab8cf | 2012-08-21 10:59:53 +0800 | [diff] [blame] | 1062 | /* |
| 1063 | * The hva returned by this function is only allowed to be read. |
| 1064 | * It should pair with kvm_read_hva() or kvm_read_hva_atomic(). |
| 1065 | */ |
| 1066 | 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] | 1067 | { |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1068 | 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] | 1069 | } |
| 1070 | |
| 1071 | static int kvm_read_hva(void *data, void __user *hva, int len) |
| 1072 | { |
| 1073 | return __copy_from_user(data, hva, len); |
| 1074 | } |
| 1075 | |
| 1076 | static int kvm_read_hva_atomic(void *data, void __user *hva, int len) |
| 1077 | { |
| 1078 | return __copy_from_user_inatomic(data, hva, len); |
Gleb Natapov | 8030089 | 2010-10-19 18:13:41 +0200 | [diff] [blame] | 1079 | } |
| 1080 | |
Geoff Levand | 39369f7 | 2013-04-05 19:20:30 +0000 | [diff] [blame] | 1081 | static int get_user_page_nowait(struct task_struct *tsk, struct mm_struct *mm, |
Gleb Natapov | 0857b9e | 2011-02-01 13:21:47 +0200 | [diff] [blame] | 1082 | unsigned long start, int write, struct page **page) |
| 1083 | { |
| 1084 | int flags = FOLL_TOUCH | FOLL_NOWAIT | FOLL_HWPOISON | FOLL_GET; |
| 1085 | |
| 1086 | if (write) |
| 1087 | flags |= FOLL_WRITE; |
| 1088 | |
| 1089 | return __get_user_pages(tsk, mm, start, 1, flags, page, NULL, NULL); |
| 1090 | } |
| 1091 | |
Huang Ying | fafc3db | 2011-01-30 11:15:49 +0800 | [diff] [blame] | 1092 | static inline int check_user_page_hwpoison(unsigned long addr) |
| 1093 | { |
| 1094 | int rc, flags = FOLL_TOUCH | FOLL_HWPOISON | FOLL_WRITE; |
| 1095 | |
| 1096 | rc = __get_user_pages(current, current->mm, addr, 1, |
| 1097 | flags, NULL, NULL, NULL); |
| 1098 | return rc == -EHWPOISON; |
| 1099 | } |
| 1100 | |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1101 | /* |
| 1102 | * The atomic path to get the writable pfn which will be stored in @pfn, |
| 1103 | * true indicates success, otherwise false is returned. |
| 1104 | */ |
| 1105 | static bool hva_to_pfn_fast(unsigned long addr, bool atomic, bool *async, |
| 1106 | bool write_fault, bool *writable, pfn_t *pfn) |
| 1107 | { |
| 1108 | struct page *page[1]; |
| 1109 | int npages; |
| 1110 | |
| 1111 | if (!(async || atomic)) |
| 1112 | return false; |
| 1113 | |
Xiao Guangrong | 12ce13f | 2012-08-21 11:00:49 +0800 | [diff] [blame] | 1114 | /* |
| 1115 | * Fast pin a writable pfn only if it is a write fault request |
| 1116 | * or the caller allows to map a writable pfn for a read fault |
| 1117 | * request. |
| 1118 | */ |
| 1119 | if (!(write_fault || writable)) |
| 1120 | return false; |
| 1121 | |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1122 | npages = __get_user_pages_fast(addr, 1, 1, page); |
| 1123 | if (npages == 1) { |
| 1124 | *pfn = page_to_pfn(page[0]); |
| 1125 | |
| 1126 | if (writable) |
| 1127 | *writable = true; |
| 1128 | return true; |
| 1129 | } |
| 1130 | |
| 1131 | return false; |
| 1132 | } |
| 1133 | |
| 1134 | /* |
| 1135 | * The slow path to get the pfn of the specified host virtual address, |
| 1136 | * 1 indicates success, -errno is returned if error is detected. |
| 1137 | */ |
| 1138 | static int hva_to_pfn_slow(unsigned long addr, bool *async, bool write_fault, |
| 1139 | bool *writable, pfn_t *pfn) |
Avi Kivity | 954bbbc | 2007-03-30 14:02:32 +0300 | [diff] [blame] | 1140 | { |
Anthony Liguori | 8d4e128 | 2007-10-18 09:59:34 -0500 | [diff] [blame] | 1141 | struct page *page[1]; |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 1142 | int npages = 0; |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1143 | |
| 1144 | might_sleep(); |
| 1145 | |
| 1146 | if (writable) |
| 1147 | *writable = write_fault; |
| 1148 | |
| 1149 | if (async) { |
| 1150 | down_read(¤t->mm->mmap_sem); |
| 1151 | npages = get_user_page_nowait(current, current->mm, |
| 1152 | addr, write_fault, page); |
| 1153 | up_read(¤t->mm->mmap_sem); |
| 1154 | } else |
| 1155 | npages = get_user_pages_fast(addr, 1, write_fault, |
| 1156 | page); |
| 1157 | if (npages != 1) |
| 1158 | return npages; |
| 1159 | |
| 1160 | /* map read fault as writable if possible */ |
Xiao Guangrong | 12ce13f | 2012-08-21 11:00:49 +0800 | [diff] [blame] | 1161 | if (unlikely(!write_fault) && writable) { |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1162 | struct page *wpage[1]; |
| 1163 | |
| 1164 | npages = __get_user_pages_fast(addr, 1, 1, wpage); |
| 1165 | if (npages == 1) { |
| 1166 | *writable = true; |
| 1167 | put_page(page[0]); |
| 1168 | page[0] = wpage[0]; |
| 1169 | } |
| 1170 | |
| 1171 | npages = 1; |
| 1172 | } |
| 1173 | *pfn = page_to_pfn(page[0]); |
| 1174 | return npages; |
| 1175 | } |
| 1176 | |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1177 | static bool vma_is_valid(struct vm_area_struct *vma, bool write_fault) |
| 1178 | { |
| 1179 | if (unlikely(!(vma->vm_flags & VM_READ))) |
| 1180 | return false; |
| 1181 | |
| 1182 | if (write_fault && (unlikely(!(vma->vm_flags & VM_WRITE)))) |
| 1183 | return false; |
| 1184 | |
| 1185 | return true; |
| 1186 | } |
| 1187 | |
Xiao Guangrong | 12ce13f | 2012-08-21 11:00:49 +0800 | [diff] [blame] | 1188 | /* |
| 1189 | * Pin guest page in memory and return its pfn. |
| 1190 | * @addr: host virtual address which maps memory to the guest |
| 1191 | * @atomic: whether this function can sleep |
| 1192 | * @async: whether this function need to wait IO complete if the |
| 1193 | * host page is not in the memory |
| 1194 | * @write_fault: whether we should get a writable host page |
| 1195 | * @writable: whether it allows to map a writable host page for !@write_fault |
| 1196 | * |
| 1197 | * The function will map a writable host page for these two cases: |
| 1198 | * 1): @write_fault = true |
| 1199 | * 2): @write_fault = false && @writable, @writable will tell the caller |
| 1200 | * whether the mapping is writable. |
| 1201 | */ |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1202 | static pfn_t hva_to_pfn(unsigned long addr, bool atomic, bool *async, |
| 1203 | bool write_fault, bool *writable) |
| 1204 | { |
| 1205 | struct vm_area_struct *vma; |
| 1206 | pfn_t pfn = 0; |
| 1207 | int npages; |
Avi Kivity | 954bbbc | 2007-03-30 14:02:32 +0300 | [diff] [blame] | 1208 | |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 1209 | /* we can do it either atomically or asynchronously, not both */ |
| 1210 | BUG_ON(atomic && async); |
| 1211 | |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1212 | if (hva_to_pfn_fast(addr, atomic, async, write_fault, writable, &pfn)) |
| 1213 | return pfn; |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1214 | |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1215 | if (atomic) |
| 1216 | return KVM_PFN_ERR_FAULT; |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1217 | |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1218 | npages = hva_to_pfn_slow(addr, async, write_fault, writable, &pfn); |
| 1219 | if (npages == 1) |
| 1220 | return pfn; |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 1221 | |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1222 | down_read(¤t->mm->mmap_sem); |
| 1223 | if (npages == -EHWPOISON || |
| 1224 | (!async && check_user_page_hwpoison(addr))) { |
| 1225 | pfn = KVM_PFN_ERR_HWPOISON; |
| 1226 | goto exit; |
Xiao Guangrong | 887c08a | 2010-08-22 19:10:28 +0800 | [diff] [blame] | 1227 | } |
Izik Eidus | 539cb66 | 2007-11-11 22:05:04 +0200 | [diff] [blame] | 1228 | |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1229 | vma = find_vma_intersection(current->mm, addr, addr + 1); |
Anthony Liguori | 8d4e128 | 2007-10-18 09:59:34 -0500 | [diff] [blame] | 1230 | |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1231 | if (vma == NULL) |
| 1232 | pfn = KVM_PFN_ERR_FAULT; |
| 1233 | else if ((vma->vm_flags & VM_PFNMAP)) { |
| 1234 | pfn = ((addr - vma->vm_start) >> PAGE_SHIFT) + |
| 1235 | vma->vm_pgoff; |
| 1236 | BUG_ON(!kvm_is_mmio_pfn(pfn)); |
| 1237 | } else { |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1238 | if (async && vma_is_valid(vma, write_fault)) |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1239 | *async = true; |
| 1240 | pfn = KVM_PFN_ERR_FAULT; |
| 1241 | } |
| 1242 | exit: |
| 1243 | up_read(¤t->mm->mmap_sem); |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1244 | return pfn; |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1245 | } |
| 1246 | |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1247 | static pfn_t |
| 1248 | __gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn, bool atomic, |
| 1249 | bool *async, bool write_fault, bool *writable) |
Xiao Guangrong | 887c08a | 2010-08-22 19:10:28 +0800 | [diff] [blame] | 1250 | { |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1251 | unsigned long addr = __gfn_to_hva_many(slot, gfn, NULL, write_fault); |
| 1252 | |
| 1253 | if (addr == KVM_HVA_ERR_RO_BAD) |
| 1254 | return KVM_PFN_ERR_RO_FAULT; |
| 1255 | |
| 1256 | if (kvm_is_error_hva(addr)) |
Xiao Guangrong | 81c52c5 | 2012-10-16 20:10:59 +0800 | [diff] [blame] | 1257 | return KVM_PFN_NOSLOT; |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1258 | |
| 1259 | /* Do not map writable pfn in the readonly memslot. */ |
| 1260 | if (writable && memslot_is_readonly(slot)) { |
| 1261 | *writable = false; |
| 1262 | writable = NULL; |
| 1263 | } |
| 1264 | |
| 1265 | return hva_to_pfn(addr, atomic, async, write_fault, |
| 1266 | writable); |
Xiao Guangrong | 887c08a | 2010-08-22 19:10:28 +0800 | [diff] [blame] | 1267 | } |
Xiao Guangrong | 887c08a | 2010-08-22 19:10:28 +0800 | [diff] [blame] | 1268 | |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1269 | static pfn_t __gfn_to_pfn(struct kvm *kvm, gfn_t gfn, bool atomic, bool *async, |
| 1270 | bool write_fault, bool *writable) |
Marcelo Tosatti | 506f0d6 | 2009-12-23 14:35:19 -0200 | [diff] [blame] | 1271 | { |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1272 | struct kvm_memory_slot *slot; |
Marcelo Tosatti | 506f0d6 | 2009-12-23 14:35:19 -0200 | [diff] [blame] | 1273 | |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 1274 | if (async) |
| 1275 | *async = false; |
| 1276 | |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1277 | slot = gfn_to_memslot(kvm, gfn); |
Marcelo Tosatti | 506f0d6 | 2009-12-23 14:35:19 -0200 | [diff] [blame] | 1278 | |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1279 | return __gfn_to_pfn_memslot(slot, gfn, atomic, async, write_fault, |
| 1280 | writable); |
Xiao Guangrong | 365fb3f | 2010-08-28 19:24:13 +0800 | [diff] [blame] | 1281 | } |
| 1282 | |
| 1283 | pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn) |
| 1284 | { |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1285 | return __gfn_to_pfn(kvm, gfn, true, NULL, true, NULL); |
Xiao Guangrong | 365fb3f | 2010-08-28 19:24:13 +0800 | [diff] [blame] | 1286 | } |
| 1287 | EXPORT_SYMBOL_GPL(gfn_to_pfn_atomic); |
| 1288 | |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1289 | pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async, |
| 1290 | bool write_fault, bool *writable) |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 1291 | { |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1292 | return __gfn_to_pfn(kvm, gfn, false, async, write_fault, writable); |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 1293 | } |
| 1294 | EXPORT_SYMBOL_GPL(gfn_to_pfn_async); |
| 1295 | |
Xiao Guangrong | 365fb3f | 2010-08-28 19:24:13 +0800 | [diff] [blame] | 1296 | pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn) |
| 1297 | { |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1298 | return __gfn_to_pfn(kvm, gfn, false, NULL, true, NULL); |
Marcelo Tosatti | 506f0d6 | 2009-12-23 14:35:19 -0200 | [diff] [blame] | 1299 | } |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1300 | EXPORT_SYMBOL_GPL(gfn_to_pfn); |
| 1301 | |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1302 | pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault, |
| 1303 | bool *writable) |
| 1304 | { |
| 1305 | return __gfn_to_pfn(kvm, gfn, false, NULL, write_fault, writable); |
| 1306 | } |
| 1307 | EXPORT_SYMBOL_GPL(gfn_to_pfn_prot); |
| 1308 | |
Xiao Guangrong | d566104 | 2012-07-17 21:56:16 +0800 | [diff] [blame] | 1309 | 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] | 1310 | { |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1311 | return __gfn_to_pfn_memslot(slot, gfn, false, NULL, true, NULL); |
Marcelo Tosatti | 506f0d6 | 2009-12-23 14:35:19 -0200 | [diff] [blame] | 1312 | } |
| 1313 | |
Xiao Guangrong | 037d92d | 2012-08-21 10:59:12 +0800 | [diff] [blame] | 1314 | pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn) |
| 1315 | { |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1316 | return __gfn_to_pfn_memslot(slot, gfn, true, NULL, true, NULL); |
Xiao Guangrong | 037d92d | 2012-08-21 10:59:12 +0800 | [diff] [blame] | 1317 | } |
| 1318 | EXPORT_SYMBOL_GPL(gfn_to_pfn_memslot_atomic); |
| 1319 | |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 1320 | int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages, |
| 1321 | int nr_pages) |
| 1322 | { |
| 1323 | unsigned long addr; |
| 1324 | gfn_t entry; |
| 1325 | |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1326 | addr = gfn_to_hva_many(gfn_to_memslot(kvm, gfn), gfn, &entry); |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 1327 | if (kvm_is_error_hva(addr)) |
| 1328 | return -1; |
| 1329 | |
| 1330 | if (entry < nr_pages) |
| 1331 | return 0; |
| 1332 | |
| 1333 | return __get_user_pages_fast(addr, nr_pages, 1, pages); |
| 1334 | } |
| 1335 | EXPORT_SYMBOL_GPL(gfn_to_page_many_atomic); |
| 1336 | |
Xiao Guangrong | a276632 | 2012-07-26 11:58:59 +0800 | [diff] [blame] | 1337 | static struct page *kvm_pfn_to_page(pfn_t pfn) |
| 1338 | { |
Xiao Guangrong | 81c52c5 | 2012-10-16 20:10:59 +0800 | [diff] [blame] | 1339 | if (is_error_noslot_pfn(pfn)) |
Xiao Guangrong | 6cede2e | 2012-08-03 15:41:22 +0800 | [diff] [blame] | 1340 | return KVM_ERR_PTR_BAD_PAGE; |
Xiao Guangrong | a276632 | 2012-07-26 11:58:59 +0800 | [diff] [blame] | 1341 | |
Xiao Guangrong | cb9aaa3 | 2012-08-03 15:42:10 +0800 | [diff] [blame] | 1342 | if (kvm_is_mmio_pfn(pfn)) { |
| 1343 | WARN_ON(1); |
| 1344 | return KVM_ERR_PTR_BAD_PAGE; |
| 1345 | } |
| 1346 | |
Xiao Guangrong | a276632 | 2012-07-26 11:58:59 +0800 | [diff] [blame] | 1347 | return pfn_to_page(pfn); |
| 1348 | } |
| 1349 | |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1350 | struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn) |
| 1351 | { |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1352 | pfn_t pfn; |
| 1353 | |
| 1354 | pfn = gfn_to_pfn(kvm, gfn); |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1355 | |
Xiao Guangrong | a276632 | 2012-07-26 11:58:59 +0800 | [diff] [blame] | 1356 | return kvm_pfn_to_page(pfn); |
Avi Kivity | 954bbbc | 2007-03-30 14:02:32 +0300 | [diff] [blame] | 1357 | } |
Anthony Liguori | aab61cc | 2007-10-29 15:15:20 -0500 | [diff] [blame] | 1358 | |
Avi Kivity | 954bbbc | 2007-03-30 14:02:32 +0300 | [diff] [blame] | 1359 | EXPORT_SYMBOL_GPL(gfn_to_page); |
| 1360 | |
Izik Eidus | b4231d6 | 2007-11-20 11:49:33 +0200 | [diff] [blame] | 1361 | void kvm_release_page_clean(struct page *page) |
| 1362 | { |
Xiao Guangrong | 32cad84 | 2012-08-03 15:42:52 +0800 | [diff] [blame] | 1363 | WARN_ON(is_error_page(page)); |
| 1364 | |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1365 | kvm_release_pfn_clean(page_to_pfn(page)); |
Izik Eidus | b4231d6 | 2007-11-20 11:49:33 +0200 | [diff] [blame] | 1366 | } |
| 1367 | EXPORT_SYMBOL_GPL(kvm_release_page_clean); |
| 1368 | |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1369 | void kvm_release_pfn_clean(pfn_t pfn) |
| 1370 | { |
Xiao Guangrong | 81c52c5 | 2012-10-16 20:10:59 +0800 | [diff] [blame] | 1371 | if (!is_error_noslot_pfn(pfn) && !kvm_is_mmio_pfn(pfn)) |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1372 | put_page(pfn_to_page(pfn)); |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1373 | } |
| 1374 | EXPORT_SYMBOL_GPL(kvm_release_pfn_clean); |
| 1375 | |
Izik Eidus | b4231d6 | 2007-11-20 11:49:33 +0200 | [diff] [blame] | 1376 | void kvm_release_page_dirty(struct page *page) |
Izik Eidus | 8a7ae05 | 2007-10-18 11:09:33 +0200 | [diff] [blame] | 1377 | { |
Xiao Guangrong | a276632 | 2012-07-26 11:58:59 +0800 | [diff] [blame] | 1378 | WARN_ON(is_error_page(page)); |
| 1379 | |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1380 | kvm_release_pfn_dirty(page_to_pfn(page)); |
Izik Eidus | 8a7ae05 | 2007-10-18 11:09:33 +0200 | [diff] [blame] | 1381 | } |
Izik Eidus | b4231d6 | 2007-11-20 11:49:33 +0200 | [diff] [blame] | 1382 | EXPORT_SYMBOL_GPL(kvm_release_page_dirty); |
Izik Eidus | 8a7ae05 | 2007-10-18 11:09:33 +0200 | [diff] [blame] | 1383 | |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1384 | void kvm_release_pfn_dirty(pfn_t pfn) |
| 1385 | { |
| 1386 | kvm_set_pfn_dirty(pfn); |
| 1387 | kvm_release_pfn_clean(pfn); |
| 1388 | } |
| 1389 | EXPORT_SYMBOL_GPL(kvm_release_pfn_dirty); |
| 1390 | |
| 1391 | void kvm_set_page_dirty(struct page *page) |
| 1392 | { |
| 1393 | kvm_set_pfn_dirty(page_to_pfn(page)); |
| 1394 | } |
| 1395 | EXPORT_SYMBOL_GPL(kvm_set_page_dirty); |
| 1396 | |
| 1397 | void kvm_set_pfn_dirty(pfn_t pfn) |
| 1398 | { |
Xiantao Zhang | c77fb9d | 2008-09-27 10:55:40 +0800 | [diff] [blame] | 1399 | if (!kvm_is_mmio_pfn(pfn)) { |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1400 | struct page *page = pfn_to_page(pfn); |
| 1401 | if (!PageReserved(page)) |
| 1402 | SetPageDirty(page); |
| 1403 | } |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1404 | } |
| 1405 | EXPORT_SYMBOL_GPL(kvm_set_pfn_dirty); |
| 1406 | |
| 1407 | void kvm_set_pfn_accessed(pfn_t pfn) |
| 1408 | { |
Xiantao Zhang | c77fb9d | 2008-09-27 10:55:40 +0800 | [diff] [blame] | 1409 | if (!kvm_is_mmio_pfn(pfn)) |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1410 | mark_page_accessed(pfn_to_page(pfn)); |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1411 | } |
| 1412 | EXPORT_SYMBOL_GPL(kvm_set_pfn_accessed); |
| 1413 | |
| 1414 | void kvm_get_pfn(pfn_t pfn) |
| 1415 | { |
Xiantao Zhang | c77fb9d | 2008-09-27 10:55:40 +0800 | [diff] [blame] | 1416 | if (!kvm_is_mmio_pfn(pfn)) |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1417 | get_page(pfn_to_page(pfn)); |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1418 | } |
| 1419 | EXPORT_SYMBOL_GPL(kvm_get_pfn); |
| 1420 | |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1421 | static int next_segment(unsigned long len, int offset) |
| 1422 | { |
| 1423 | if (len > PAGE_SIZE - offset) |
| 1424 | return PAGE_SIZE - offset; |
| 1425 | else |
| 1426 | return len; |
| 1427 | } |
| 1428 | |
| 1429 | int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, |
| 1430 | int len) |
| 1431 | { |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1432 | int r; |
| 1433 | unsigned long addr; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1434 | |
Xiao Guangrong | 86ab8cf | 2012-08-21 10:59:53 +0800 | [diff] [blame] | 1435 | addr = gfn_to_hva_read(kvm, gfn); |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1436 | if (kvm_is_error_hva(addr)) |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1437 | return -EFAULT; |
Xiao Guangrong | 86ab8cf | 2012-08-21 10:59:53 +0800 | [diff] [blame] | 1438 | r = kvm_read_hva(data, (void __user *)addr + offset, len); |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1439 | if (r) |
| 1440 | return -EFAULT; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1441 | return 0; |
| 1442 | } |
| 1443 | EXPORT_SYMBOL_GPL(kvm_read_guest_page); |
| 1444 | |
| 1445 | int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len) |
| 1446 | { |
| 1447 | gfn_t gfn = gpa >> PAGE_SHIFT; |
| 1448 | int seg; |
| 1449 | int offset = offset_in_page(gpa); |
| 1450 | int ret; |
| 1451 | |
| 1452 | while ((seg = next_segment(len, offset)) != 0) { |
| 1453 | ret = kvm_read_guest_page(kvm, gfn, data, offset, seg); |
| 1454 | if (ret < 0) |
| 1455 | return ret; |
| 1456 | offset = 0; |
| 1457 | len -= seg; |
| 1458 | data += seg; |
| 1459 | ++gfn; |
| 1460 | } |
| 1461 | return 0; |
| 1462 | } |
| 1463 | EXPORT_SYMBOL_GPL(kvm_read_guest); |
| 1464 | |
Marcelo Tosatti | 7ec5458 | 2007-12-20 19:18:23 -0500 | [diff] [blame] | 1465 | int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, |
| 1466 | unsigned long len) |
| 1467 | { |
| 1468 | int r; |
| 1469 | unsigned long addr; |
| 1470 | gfn_t gfn = gpa >> PAGE_SHIFT; |
| 1471 | int offset = offset_in_page(gpa); |
| 1472 | |
Xiao Guangrong | 86ab8cf | 2012-08-21 10:59:53 +0800 | [diff] [blame] | 1473 | addr = gfn_to_hva_read(kvm, gfn); |
Marcelo Tosatti | 7ec5458 | 2007-12-20 19:18:23 -0500 | [diff] [blame] | 1474 | if (kvm_is_error_hva(addr)) |
| 1475 | return -EFAULT; |
Andrea Arcangeli | 0aac03f | 2008-01-30 19:57:35 +0100 | [diff] [blame] | 1476 | pagefault_disable(); |
Xiao Guangrong | 86ab8cf | 2012-08-21 10:59:53 +0800 | [diff] [blame] | 1477 | r = kvm_read_hva_atomic(data, (void __user *)addr + offset, len); |
Andrea Arcangeli | 0aac03f | 2008-01-30 19:57:35 +0100 | [diff] [blame] | 1478 | pagefault_enable(); |
Marcelo Tosatti | 7ec5458 | 2007-12-20 19:18:23 -0500 | [diff] [blame] | 1479 | if (r) |
| 1480 | return -EFAULT; |
| 1481 | return 0; |
| 1482 | } |
| 1483 | EXPORT_SYMBOL(kvm_read_guest_atomic); |
| 1484 | |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1485 | int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, |
| 1486 | int offset, int len) |
| 1487 | { |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1488 | int r; |
| 1489 | unsigned long addr; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1490 | |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1491 | addr = gfn_to_hva(kvm, gfn); |
| 1492 | if (kvm_is_error_hva(addr)) |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1493 | return -EFAULT; |
Xiao Guangrong | 8b0cedf | 2011-05-15 23:22:04 +0800 | [diff] [blame] | 1494 | r = __copy_to_user((void __user *)addr + offset, data, len); |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1495 | if (r) |
| 1496 | return -EFAULT; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1497 | mark_page_dirty(kvm, gfn); |
| 1498 | return 0; |
| 1499 | } |
| 1500 | EXPORT_SYMBOL_GPL(kvm_write_guest_page); |
| 1501 | |
| 1502 | int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, |
| 1503 | unsigned long len) |
| 1504 | { |
| 1505 | gfn_t gfn = gpa >> PAGE_SHIFT; |
| 1506 | int seg; |
| 1507 | int offset = offset_in_page(gpa); |
| 1508 | int ret; |
| 1509 | |
| 1510 | while ((seg = next_segment(len, offset)) != 0) { |
| 1511 | ret = kvm_write_guest_page(kvm, gfn, data, offset, seg); |
| 1512 | if (ret < 0) |
| 1513 | return ret; |
| 1514 | offset = 0; |
| 1515 | len -= seg; |
| 1516 | data += seg; |
| 1517 | ++gfn; |
| 1518 | } |
| 1519 | return 0; |
| 1520 | } |
| 1521 | |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1522 | int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc, |
| 1523 | gpa_t gpa) |
| 1524 | { |
| 1525 | struct kvm_memslots *slots = kvm_memslots(kvm); |
| 1526 | int offset = offset_in_page(gpa); |
| 1527 | gfn_t gfn = gpa >> PAGE_SHIFT; |
| 1528 | |
| 1529 | ghc->gpa = gpa; |
| 1530 | ghc->generation = slots->generation; |
Paul Mackerras | 9d4cba7 | 2012-01-12 20:09:51 +0000 | [diff] [blame] | 1531 | ghc->memslot = gfn_to_memslot(kvm, gfn); |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1532 | ghc->hva = gfn_to_hva_many(ghc->memslot, gfn, NULL); |
| 1533 | if (!kvm_is_error_hva(ghc->hva)) |
| 1534 | ghc->hva += offset; |
| 1535 | else |
| 1536 | return -EFAULT; |
| 1537 | |
| 1538 | return 0; |
| 1539 | } |
| 1540 | EXPORT_SYMBOL_GPL(kvm_gfn_to_hva_cache_init); |
| 1541 | |
| 1542 | int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, |
| 1543 | void *data, unsigned long len) |
| 1544 | { |
| 1545 | struct kvm_memslots *slots = kvm_memslots(kvm); |
| 1546 | int r; |
| 1547 | |
| 1548 | if (slots->generation != ghc->generation) |
| 1549 | kvm_gfn_to_hva_cache_init(kvm, ghc, ghc->gpa); |
| 1550 | |
| 1551 | if (kvm_is_error_hva(ghc->hva)) |
| 1552 | return -EFAULT; |
| 1553 | |
Xiao Guangrong | 8b0cedf | 2011-05-15 23:22:04 +0800 | [diff] [blame] | 1554 | r = __copy_to_user((void __user *)ghc->hva, data, len); |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1555 | if (r) |
| 1556 | return -EFAULT; |
| 1557 | mark_page_dirty_in_slot(kvm, ghc->memslot, ghc->gpa >> PAGE_SHIFT); |
| 1558 | |
| 1559 | return 0; |
| 1560 | } |
| 1561 | EXPORT_SYMBOL_GPL(kvm_write_guest_cached); |
| 1562 | |
Gleb Natapov | e03b644 | 2011-07-11 15:28:11 -0400 | [diff] [blame] | 1563 | int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, |
| 1564 | void *data, unsigned long len) |
| 1565 | { |
| 1566 | struct kvm_memslots *slots = kvm_memslots(kvm); |
| 1567 | int r; |
| 1568 | |
| 1569 | if (slots->generation != ghc->generation) |
| 1570 | kvm_gfn_to_hva_cache_init(kvm, ghc, ghc->gpa); |
| 1571 | |
| 1572 | if (kvm_is_error_hva(ghc->hva)) |
| 1573 | return -EFAULT; |
| 1574 | |
| 1575 | r = __copy_from_user(data, (void __user *)ghc->hva, len); |
| 1576 | if (r) |
| 1577 | return -EFAULT; |
| 1578 | |
| 1579 | return 0; |
| 1580 | } |
| 1581 | EXPORT_SYMBOL_GPL(kvm_read_guest_cached); |
| 1582 | |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1583 | int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len) |
| 1584 | { |
Heiko Carstens | 3bcc8a8 | 2010-10-27 17:21:21 +0200 | [diff] [blame] | 1585 | return kvm_write_guest_page(kvm, gfn, (const void *) empty_zero_page, |
| 1586 | offset, len); |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1587 | } |
| 1588 | EXPORT_SYMBOL_GPL(kvm_clear_guest_page); |
| 1589 | |
| 1590 | int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len) |
| 1591 | { |
| 1592 | gfn_t gfn = gpa >> PAGE_SHIFT; |
| 1593 | int seg; |
| 1594 | int offset = offset_in_page(gpa); |
| 1595 | int ret; |
| 1596 | |
| 1597 | while ((seg = next_segment(len, offset)) != 0) { |
| 1598 | ret = kvm_clear_guest_page(kvm, gfn, offset, seg); |
| 1599 | if (ret < 0) |
| 1600 | return ret; |
| 1601 | offset = 0; |
| 1602 | len -= seg; |
| 1603 | ++gfn; |
| 1604 | } |
| 1605 | return 0; |
| 1606 | } |
| 1607 | EXPORT_SYMBOL_GPL(kvm_clear_guest); |
| 1608 | |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1609 | void mark_page_dirty_in_slot(struct kvm *kvm, struct kvm_memory_slot *memslot, |
| 1610 | gfn_t gfn) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1611 | { |
Rusty Russell | 7e9d619 | 2007-07-31 20:41:14 +1000 | [diff] [blame] | 1612 | if (memslot && memslot->dirty_bitmap) { |
| 1613 | unsigned long rel_gfn = gfn - memslot->base_gfn; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1614 | |
Takuya Yoshikawa | b74ca3b | 2012-10-04 17:13:12 -0700 | [diff] [blame] | 1615 | set_bit_le(rel_gfn, memslot->dirty_bitmap); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1616 | } |
| 1617 | } |
| 1618 | |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1619 | void mark_page_dirty(struct kvm *kvm, gfn_t gfn) |
| 1620 | { |
| 1621 | struct kvm_memory_slot *memslot; |
| 1622 | |
| 1623 | memslot = gfn_to_memslot(kvm, gfn); |
| 1624 | mark_page_dirty_in_slot(kvm, memslot, gfn); |
| 1625 | } |
| 1626 | |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1627 | /* |
| 1628 | * The vCPU has executed a HLT instruction with in-kernel mode enabled. |
| 1629 | */ |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 1630 | void kvm_vcpu_block(struct kvm_vcpu *vcpu) |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1631 | { |
Marcelo Tosatti | e5c239c | 2008-05-08 19:47:01 -0300 | [diff] [blame] | 1632 | DEFINE_WAIT(wait); |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1633 | |
Marcelo Tosatti | e5c239c | 2008-05-08 19:47:01 -0300 | [diff] [blame] | 1634 | for (;;) { |
| 1635 | prepare_to_wait(&vcpu->wq, &wait, TASK_INTERRUPTIBLE); |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1636 | |
Gleb Natapov | a1b3710 | 2009-07-09 15:33:52 +0300 | [diff] [blame] | 1637 | if (kvm_arch_vcpu_runnable(vcpu)) { |
Avi Kivity | a8eeb04 | 2010-05-10 12:34:53 +0300 | [diff] [blame] | 1638 | kvm_make_request(KVM_REQ_UNHALT, vcpu); |
Marcelo Tosatti | e5c239c | 2008-05-08 19:47:01 -0300 | [diff] [blame] | 1639 | break; |
Marcelo Tosatti | d769017 | 2008-09-08 15:23:48 -0300 | [diff] [blame] | 1640 | } |
Gleb Natapov | 09cec75 | 2009-03-23 15:11:44 +0200 | [diff] [blame] | 1641 | if (kvm_cpu_has_pending_timer(vcpu)) |
| 1642 | break; |
Marcelo Tosatti | e5c239c | 2008-05-08 19:47:01 -0300 | [diff] [blame] | 1643 | if (signal_pending(current)) |
| 1644 | break; |
| 1645 | |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1646 | schedule(); |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1647 | } |
| 1648 | |
Marcelo Tosatti | e5c239c | 2008-05-08 19:47:01 -0300 | [diff] [blame] | 1649 | finish_wait(&vcpu->wq, &wait); |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1650 | } |
| 1651 | |
Marcelo Tosatti | 8c84780 | 2012-03-14 17:58:48 -0300 | [diff] [blame] | 1652 | #ifndef CONFIG_S390 |
Christoffer Dall | b6d3383 | 2012-03-08 16:44:24 -0500 | [diff] [blame] | 1653 | /* |
| 1654 | * Kick a sleeping VCPU, or a guest VCPU in guest mode, into host kernel mode. |
| 1655 | */ |
| 1656 | void kvm_vcpu_kick(struct kvm_vcpu *vcpu) |
| 1657 | { |
| 1658 | int me; |
| 1659 | int cpu = vcpu->cpu; |
| 1660 | wait_queue_head_t *wqp; |
| 1661 | |
| 1662 | wqp = kvm_arch_vcpu_wq(vcpu); |
| 1663 | if (waitqueue_active(wqp)) { |
| 1664 | wake_up_interruptible(wqp); |
| 1665 | ++vcpu->stat.halt_wakeup; |
| 1666 | } |
| 1667 | |
| 1668 | me = get_cpu(); |
| 1669 | if (cpu != me && (unsigned)cpu < nr_cpu_ids && cpu_online(cpu)) |
| 1670 | if (kvm_arch_vcpu_should_kick(vcpu)) |
| 1671 | smp_send_reschedule(cpu); |
| 1672 | put_cpu(); |
| 1673 | } |
Yang Zhang | a20ed54 | 2013-04-11 19:25:15 +0800 | [diff] [blame] | 1674 | EXPORT_SYMBOL_GPL(kvm_vcpu_kick); |
Marcelo Tosatti | 8c84780 | 2012-03-14 17:58:48 -0300 | [diff] [blame] | 1675 | #endif /* !CONFIG_S390 */ |
Christoffer Dall | b6d3383 | 2012-03-08 16:44:24 -0500 | [diff] [blame] | 1676 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1677 | void kvm_resched(struct kvm_vcpu *vcpu) |
| 1678 | { |
Yaozu Dong | 3fca036 | 2007-04-25 16:49:19 +0300 | [diff] [blame] | 1679 | if (!need_resched()) |
| 1680 | return; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1681 | cond_resched(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1682 | } |
| 1683 | EXPORT_SYMBOL_GPL(kvm_resched); |
| 1684 | |
Konstantin Weitz | 41628d3 | 2012-04-25 15:30:38 +0200 | [diff] [blame] | 1685 | bool kvm_vcpu_yield_to(struct kvm_vcpu *target) |
| 1686 | { |
| 1687 | struct pid *pid; |
| 1688 | struct task_struct *task = NULL; |
Raghavendra K T | c45c528 | 2013-01-22 13:09:24 +0530 | [diff] [blame] | 1689 | bool ret = false; |
Konstantin Weitz | 41628d3 | 2012-04-25 15:30:38 +0200 | [diff] [blame] | 1690 | |
| 1691 | rcu_read_lock(); |
| 1692 | pid = rcu_dereference(target->pid); |
| 1693 | if (pid) |
| 1694 | task = get_pid_task(target->pid, PIDTYPE_PID); |
| 1695 | rcu_read_unlock(); |
| 1696 | if (!task) |
Raghavendra K T | c45c528 | 2013-01-22 13:09:24 +0530 | [diff] [blame] | 1697 | return ret; |
Konstantin Weitz | 41628d3 | 2012-04-25 15:30:38 +0200 | [diff] [blame] | 1698 | if (task->flags & PF_VCPU) { |
| 1699 | put_task_struct(task); |
Raghavendra K T | c45c528 | 2013-01-22 13:09:24 +0530 | [diff] [blame] | 1700 | return ret; |
Konstantin Weitz | 41628d3 | 2012-04-25 15:30:38 +0200 | [diff] [blame] | 1701 | } |
Raghavendra K T | c45c528 | 2013-01-22 13:09:24 +0530 | [diff] [blame] | 1702 | ret = yield_to(task, 1); |
Konstantin Weitz | 41628d3 | 2012-04-25 15:30:38 +0200 | [diff] [blame] | 1703 | put_task_struct(task); |
Raghavendra K T | c45c528 | 2013-01-22 13:09:24 +0530 | [diff] [blame] | 1704 | |
| 1705 | return ret; |
Konstantin Weitz | 41628d3 | 2012-04-25 15:30:38 +0200 | [diff] [blame] | 1706 | } |
| 1707 | EXPORT_SYMBOL_GPL(kvm_vcpu_yield_to); |
| 1708 | |
Raghavendra K T | 06e48c5 | 2012-07-19 15:17:52 +0530 | [diff] [blame] | 1709 | #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT |
| 1710 | /* |
| 1711 | * Helper that checks whether a VCPU is eligible for directed yield. |
| 1712 | * Most eligible candidate to yield is decided by following heuristics: |
| 1713 | * |
| 1714 | * (a) VCPU which has not done pl-exit or cpu relax intercepted recently |
| 1715 | * (preempted lock holder), indicated by @in_spin_loop. |
| 1716 | * Set at the beiginning and cleared at the end of interception/PLE handler. |
| 1717 | * |
| 1718 | * (b) VCPU which has done pl-exit/ cpu relax intercepted but did not get |
| 1719 | * chance last time (mostly it has become eligible now since we have probably |
| 1720 | * yielded to lockholder in last iteration. This is done by toggling |
| 1721 | * @dy_eligible each time a VCPU checked for eligibility.) |
| 1722 | * |
| 1723 | * Yielding to a recently pl-exited/cpu relax intercepted VCPU before yielding |
| 1724 | * to preempted lock-holder could result in wrong VCPU selection and CPU |
| 1725 | * burning. Giving priority for a potential lock-holder increases lock |
| 1726 | * progress. |
| 1727 | * |
| 1728 | * Since algorithm is based on heuristics, accessing another VCPU data without |
| 1729 | * locking does not harm. It may result in trying to yield to same VCPU, fail |
| 1730 | * and continue with next VCPU and so on. |
| 1731 | */ |
| 1732 | bool kvm_vcpu_eligible_for_directed_yield(struct kvm_vcpu *vcpu) |
| 1733 | { |
| 1734 | bool eligible; |
| 1735 | |
| 1736 | eligible = !vcpu->spin_loop.in_spin_loop || |
| 1737 | (vcpu->spin_loop.in_spin_loop && |
| 1738 | vcpu->spin_loop.dy_eligible); |
| 1739 | |
| 1740 | if (vcpu->spin_loop.in_spin_loop) |
| 1741 | kvm_vcpu_set_dy_eligible(vcpu, !vcpu->spin_loop.dy_eligible); |
| 1742 | |
| 1743 | return eligible; |
| 1744 | } |
| 1745 | #endif |
Raghavendra K T | c45c528 | 2013-01-22 13:09:24 +0530 | [diff] [blame] | 1746 | |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 1747 | void kvm_vcpu_on_spin(struct kvm_vcpu *me) |
Zhai, Edwin | d255f4f | 2009-10-09 18:03:20 +0800 | [diff] [blame] | 1748 | { |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 1749 | struct kvm *kvm = me->kvm; |
| 1750 | struct kvm_vcpu *vcpu; |
| 1751 | int last_boosted_vcpu = me->kvm->last_boosted_vcpu; |
| 1752 | int yielded = 0; |
Raghavendra K T | c45c528 | 2013-01-22 13:09:24 +0530 | [diff] [blame] | 1753 | int try = 3; |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 1754 | int pass; |
| 1755 | int i; |
Zhai, Edwin | d255f4f | 2009-10-09 18:03:20 +0800 | [diff] [blame] | 1756 | |
Raghavendra K T | 4c08849 | 2012-07-18 19:07:46 +0530 | [diff] [blame] | 1757 | kvm_vcpu_set_in_spin_loop(me, true); |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 1758 | /* |
| 1759 | * We boost the priority of a VCPU that is runnable but not |
| 1760 | * currently running, because it got preempted by something |
| 1761 | * else and called schedule in __vcpu_run. Hopefully that |
| 1762 | * VCPU is holding the lock that we need and will release it. |
| 1763 | * We approximate round-robin by starting at the last boosted VCPU. |
| 1764 | */ |
Raghavendra K T | c45c528 | 2013-01-22 13:09:24 +0530 | [diff] [blame] | 1765 | for (pass = 0; pass < 2 && !yielded && try; pass++) { |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 1766 | kvm_for_each_vcpu(i, vcpu, kvm) { |
Rik van Riel | 5cfc2aa | 2012-06-19 16:51:04 -0400 | [diff] [blame] | 1767 | if (!pass && i <= last_boosted_vcpu) { |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 1768 | i = last_boosted_vcpu; |
| 1769 | continue; |
| 1770 | } else if (pass && i > last_boosted_vcpu) |
| 1771 | break; |
Raghavendra K T | 7bc7ae2 | 2013-03-04 23:32:27 +0530 | [diff] [blame] | 1772 | if (!ACCESS_ONCE(vcpu->preempted)) |
| 1773 | continue; |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 1774 | if (vcpu == me) |
| 1775 | continue; |
| 1776 | if (waitqueue_active(&vcpu->wq)) |
| 1777 | continue; |
Raghavendra K T | 06e48c5 | 2012-07-19 15:17:52 +0530 | [diff] [blame] | 1778 | if (!kvm_vcpu_eligible_for_directed_yield(vcpu)) |
| 1779 | continue; |
Raghavendra K T | c45c528 | 2013-01-22 13:09:24 +0530 | [diff] [blame] | 1780 | |
| 1781 | yielded = kvm_vcpu_yield_to(vcpu); |
| 1782 | if (yielded > 0) { |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 1783 | kvm->last_boosted_vcpu = i; |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 1784 | break; |
Raghavendra K T | c45c528 | 2013-01-22 13:09:24 +0530 | [diff] [blame] | 1785 | } else if (yielded < 0) { |
| 1786 | try--; |
| 1787 | if (!try) |
| 1788 | break; |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 1789 | } |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 1790 | } |
| 1791 | } |
Raghavendra K T | 4c08849 | 2012-07-18 19:07:46 +0530 | [diff] [blame] | 1792 | kvm_vcpu_set_in_spin_loop(me, false); |
Raghavendra K T | 06e48c5 | 2012-07-19 15:17:52 +0530 | [diff] [blame] | 1793 | |
| 1794 | /* Ensure vcpu is not eligible during next spinloop */ |
| 1795 | kvm_vcpu_set_dy_eligible(me, false); |
Zhai, Edwin | d255f4f | 2009-10-09 18:03:20 +0800 | [diff] [blame] | 1796 | } |
| 1797 | EXPORT_SYMBOL_GPL(kvm_vcpu_on_spin); |
| 1798 | |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 1799 | 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] | 1800 | { |
| 1801 | struct kvm_vcpu *vcpu = vma->vm_file->private_data; |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 1802 | struct page *page; |
| 1803 | |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 1804 | if (vmf->pgoff == 0) |
Avi Kivity | 039576c | 2007-03-20 12:46:50 +0200 | [diff] [blame] | 1805 | page = virt_to_page(vcpu->run); |
Avi Kivity | 0956676 | 2008-01-23 18:14:23 +0200 | [diff] [blame] | 1806 | #ifdef CONFIG_X86 |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 1807 | else if (vmf->pgoff == KVM_PIO_PAGE_OFFSET) |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1808 | page = virt_to_page(vcpu->arch.pio_data); |
Avi Kivity | 0956676 | 2008-01-23 18:14:23 +0200 | [diff] [blame] | 1809 | #endif |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 1810 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
| 1811 | else if (vmf->pgoff == KVM_COALESCED_MMIO_PAGE_OFFSET) |
| 1812 | page = virt_to_page(vcpu->kvm->coalesced_mmio_ring); |
| 1813 | #endif |
Avi Kivity | 039576c | 2007-03-20 12:46:50 +0200 | [diff] [blame] | 1814 | else |
Carsten Otte | 5b1c149 | 2012-01-04 10:25:23 +0100 | [diff] [blame] | 1815 | return kvm_arch_vcpu_fault(vcpu, vmf); |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 1816 | get_page(page); |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 1817 | vmf->page = page; |
| 1818 | return 0; |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 1819 | } |
| 1820 | |
Alexey Dobriyan | f0f37e2 | 2009-09-27 22:29:37 +0400 | [diff] [blame] | 1821 | static const struct vm_operations_struct kvm_vcpu_vm_ops = { |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 1822 | .fault = kvm_vcpu_fault, |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 1823 | }; |
| 1824 | |
| 1825 | static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma) |
| 1826 | { |
| 1827 | vma->vm_ops = &kvm_vcpu_vm_ops; |
| 1828 | return 0; |
| 1829 | } |
| 1830 | |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1831 | static int kvm_vcpu_release(struct inode *inode, struct file *filp) |
| 1832 | { |
| 1833 | struct kvm_vcpu *vcpu = filp->private_data; |
| 1834 | |
Al Viro | 66c0b39 | 2008-04-19 20:33:56 +0100 | [diff] [blame] | 1835 | kvm_put_kvm(vcpu->kvm); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1836 | return 0; |
| 1837 | } |
| 1838 | |
Christian Borntraeger | 3d3aab1 | 2008-12-02 11:17:32 +0100 | [diff] [blame] | 1839 | static struct file_operations kvm_vcpu_fops = { |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1840 | .release = kvm_vcpu_release, |
| 1841 | .unlocked_ioctl = kvm_vcpu_ioctl, |
Alexander Graf | 1dda606 | 2011-06-08 02:45:37 +0200 | [diff] [blame] | 1842 | #ifdef CONFIG_COMPAT |
| 1843 | .compat_ioctl = kvm_vcpu_compat_ioctl, |
| 1844 | #endif |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 1845 | .mmap = kvm_vcpu_mmap, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 1846 | .llseek = noop_llseek, |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1847 | }; |
| 1848 | |
| 1849 | /* |
| 1850 | * Allocates an inode for the vcpu. |
| 1851 | */ |
| 1852 | static int create_vcpu_fd(struct kvm_vcpu *vcpu) |
| 1853 | { |
Roland Dreier | 628ff7c | 2009-12-18 09:41:24 -0800 | [diff] [blame] | 1854 | return anon_inode_getfd("kvm-vcpu", &kvm_vcpu_fops, vcpu, O_RDWR); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1855 | } |
| 1856 | |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 1857 | /* |
| 1858 | * Creates some virtual cpus. Good luck creating more than one. |
| 1859 | */ |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 1860 | static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, u32 id) |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 1861 | { |
| 1862 | int r; |
Gleb Natapov | 988a2ca | 2009-06-09 15:56:29 +0300 | [diff] [blame] | 1863 | struct kvm_vcpu *vcpu, *v; |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 1864 | |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 1865 | vcpu = kvm_arch_vcpu_create(kvm, id); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 1866 | if (IS_ERR(vcpu)) |
| 1867 | return PTR_ERR(vcpu); |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 1868 | |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 1869 | preempt_notifier_init(&vcpu->preempt_notifier, &kvm_preempt_ops); |
| 1870 | |
Avi Kivity | 26e5215 | 2007-11-20 15:30:24 +0200 | [diff] [blame] | 1871 | r = kvm_arch_vcpu_setup(vcpu); |
| 1872 | if (r) |
Jan Kiszka | d780592 | 2011-05-23 10:33:05 +0200 | [diff] [blame] | 1873 | goto vcpu_destroy; |
Avi Kivity | 26e5215 | 2007-11-20 15:30:24 +0200 | [diff] [blame] | 1874 | |
Shaohua Li | 11ec280 | 2007-07-23 14:51:37 +0800 | [diff] [blame] | 1875 | mutex_lock(&kvm->lock); |
Avi Kivity | 3e51570 | 2012-03-05 14:23:29 +0200 | [diff] [blame] | 1876 | if (!kvm_vcpu_compatible(vcpu)) { |
| 1877 | r = -EINVAL; |
| 1878 | goto unlock_vcpu_destroy; |
| 1879 | } |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 1880 | if (atomic_read(&kvm->online_vcpus) == KVM_MAX_VCPUS) { |
| 1881 | r = -EINVAL; |
Jan Kiszka | d780592 | 2011-05-23 10:33:05 +0200 | [diff] [blame] | 1882 | goto unlock_vcpu_destroy; |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 1883 | } |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 1884 | |
Gleb Natapov | 988a2ca | 2009-06-09 15:56:29 +0300 | [diff] [blame] | 1885 | kvm_for_each_vcpu(r, v, kvm) |
| 1886 | if (v->vcpu_id == id) { |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 1887 | r = -EEXIST; |
Jan Kiszka | d780592 | 2011-05-23 10:33:05 +0200 | [diff] [blame] | 1888 | goto unlock_vcpu_destroy; |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 1889 | } |
| 1890 | |
| 1891 | BUG_ON(kvm->vcpus[atomic_read(&kvm->online_vcpus)]); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 1892 | |
| 1893 | /* Now it's all set up, let userspace reach it */ |
Al Viro | 66c0b39 | 2008-04-19 20:33:56 +0100 | [diff] [blame] | 1894 | kvm_get_kvm(kvm); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1895 | r = create_vcpu_fd(vcpu); |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 1896 | if (r < 0) { |
| 1897 | kvm_put_kvm(kvm); |
Jan Kiszka | d780592 | 2011-05-23 10:33:05 +0200 | [diff] [blame] | 1898 | goto unlock_vcpu_destroy; |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 1899 | } |
| 1900 | |
| 1901 | kvm->vcpus[atomic_read(&kvm->online_vcpus)] = vcpu; |
| 1902 | smp_wmb(); |
| 1903 | atomic_inc(&kvm->online_vcpus); |
| 1904 | |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 1905 | mutex_unlock(&kvm->lock); |
Marcelo Tosatti | 42897d8 | 2012-11-27 23:29:02 -0200 | [diff] [blame] | 1906 | kvm_arch_vcpu_postcreate(vcpu); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1907 | return r; |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 1908 | |
Jan Kiszka | d780592 | 2011-05-23 10:33:05 +0200 | [diff] [blame] | 1909 | unlock_vcpu_destroy: |
Glauber Costa | 7d8fece | 2008-09-17 23:16:59 -0300 | [diff] [blame] | 1910 | mutex_unlock(&kvm->lock); |
Jan Kiszka | d780592 | 2011-05-23 10:33:05 +0200 | [diff] [blame] | 1911 | vcpu_destroy: |
Hollis Blanchard | d40ccc6 | 2007-11-19 14:04:43 -0600 | [diff] [blame] | 1912 | kvm_arch_vcpu_destroy(vcpu); |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 1913 | return r; |
| 1914 | } |
| 1915 | |
Avi Kivity | 1961d27 | 2007-03-05 19:46:05 +0200 | [diff] [blame] | 1916 | static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset) |
| 1917 | { |
| 1918 | if (sigset) { |
| 1919 | sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP)); |
| 1920 | vcpu->sigset_active = 1; |
| 1921 | vcpu->sigset = *sigset; |
| 1922 | } else |
| 1923 | vcpu->sigset_active = 0; |
| 1924 | return 0; |
| 1925 | } |
| 1926 | |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1927 | static long kvm_vcpu_ioctl(struct file *filp, |
| 1928 | unsigned int ioctl, unsigned long arg) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1929 | { |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1930 | struct kvm_vcpu *vcpu = filp->private_data; |
Al Viro | 2f366987 | 2007-02-09 16:38:35 +0000 | [diff] [blame] | 1931 | void __user *argp = (void __user *)arg; |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 1932 | int r; |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 1933 | struct kvm_fpu *fpu = NULL; |
| 1934 | struct kvm_sregs *kvm_sregs = NULL; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1935 | |
Avi Kivity | 6d4e4c4 | 2007-11-21 16:41:05 +0200 | [diff] [blame] | 1936 | if (vcpu->kvm->mm != current->mm) |
| 1937 | return -EIO; |
Avi Kivity | 2122ff5 | 2010-05-13 11:25:04 +0300 | [diff] [blame] | 1938 | |
| 1939 | #if defined(CONFIG_S390) || defined(CONFIG_PPC) |
| 1940 | /* |
| 1941 | * Special cases: vcpu ioctls that are asynchronous to vcpu execution, |
| 1942 | * so vcpu_load() would break it. |
| 1943 | */ |
| 1944 | if (ioctl == KVM_S390_INTERRUPT || ioctl == KVM_INTERRUPT) |
| 1945 | return kvm_arch_vcpu_ioctl(filp, ioctl, arg); |
| 1946 | #endif |
| 1947 | |
| 1948 | |
Michael S. Tsirkin | 9fc7744 | 2012-09-16 11:50:30 +0300 | [diff] [blame] | 1949 | r = vcpu_load(vcpu); |
| 1950 | if (r) |
| 1951 | return r; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1952 | switch (ioctl) { |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 1953 | case KVM_RUN: |
Avi Kivity | f0fe510 | 2007-03-07 13:11:17 +0200 | [diff] [blame] | 1954 | r = -EINVAL; |
| 1955 | if (arg) |
| 1956 | goto out; |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 1957 | r = kvm_arch_vcpu_ioctl_run(vcpu, vcpu->run); |
Gleb Natapov | 64be500 | 2010-10-24 16:49:08 +0200 | [diff] [blame] | 1958 | trace_kvm_userspace_exit(vcpu->run->exit_reason, r); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1959 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1960 | case KVM_GET_REGS: { |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1961 | struct kvm_regs *kvm_regs; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1962 | |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1963 | r = -ENOMEM; |
| 1964 | kvm_regs = kzalloc(sizeof(struct kvm_regs), GFP_KERNEL); |
| 1965 | if (!kvm_regs) |
| 1966 | goto out; |
| 1967 | r = kvm_arch_vcpu_ioctl_get_regs(vcpu, kvm_regs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1968 | if (r) |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1969 | goto out_free1; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1970 | r = -EFAULT; |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1971 | if (copy_to_user(argp, kvm_regs, sizeof(struct kvm_regs))) |
| 1972 | goto out_free1; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1973 | r = 0; |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1974 | out_free1: |
| 1975 | kfree(kvm_regs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1976 | break; |
| 1977 | } |
| 1978 | case KVM_SET_REGS: { |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1979 | struct kvm_regs *kvm_regs; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1980 | |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1981 | r = -ENOMEM; |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 1982 | kvm_regs = memdup_user(argp, sizeof(*kvm_regs)); |
| 1983 | if (IS_ERR(kvm_regs)) { |
| 1984 | r = PTR_ERR(kvm_regs); |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1985 | goto out; |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 1986 | } |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1987 | r = kvm_arch_vcpu_ioctl_set_regs(vcpu, kvm_regs); |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 1988 | kfree(kvm_regs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1989 | break; |
| 1990 | } |
| 1991 | case KVM_GET_SREGS: { |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 1992 | kvm_sregs = kzalloc(sizeof(struct kvm_sregs), GFP_KERNEL); |
| 1993 | r = -ENOMEM; |
| 1994 | if (!kvm_sregs) |
| 1995 | goto out; |
| 1996 | r = kvm_arch_vcpu_ioctl_get_sregs(vcpu, kvm_sregs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1997 | if (r) |
| 1998 | goto out; |
| 1999 | r = -EFAULT; |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 2000 | if (copy_to_user(argp, kvm_sregs, sizeof(struct kvm_sregs))) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2001 | goto out; |
| 2002 | r = 0; |
| 2003 | break; |
| 2004 | } |
| 2005 | case KVM_SET_SREGS: { |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 2006 | kvm_sregs = memdup_user(argp, sizeof(*kvm_sregs)); |
| 2007 | if (IS_ERR(kvm_sregs)) { |
| 2008 | r = PTR_ERR(kvm_sregs); |
Guo Chao | 1859541 | 2012-11-02 18:33:21 +0800 | [diff] [blame] | 2009 | kvm_sregs = NULL; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2010 | goto out; |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 2011 | } |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 2012 | r = kvm_arch_vcpu_ioctl_set_sregs(vcpu, kvm_sregs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2013 | break; |
| 2014 | } |
Marcelo Tosatti | 62d9f0d | 2008-04-11 13:24:45 -0300 | [diff] [blame] | 2015 | case KVM_GET_MP_STATE: { |
| 2016 | struct kvm_mp_state mp_state; |
| 2017 | |
| 2018 | r = kvm_arch_vcpu_ioctl_get_mpstate(vcpu, &mp_state); |
| 2019 | if (r) |
| 2020 | goto out; |
| 2021 | r = -EFAULT; |
| 2022 | if (copy_to_user(argp, &mp_state, sizeof mp_state)) |
| 2023 | goto out; |
| 2024 | r = 0; |
| 2025 | break; |
| 2026 | } |
| 2027 | case KVM_SET_MP_STATE: { |
| 2028 | struct kvm_mp_state mp_state; |
| 2029 | |
| 2030 | r = -EFAULT; |
| 2031 | if (copy_from_user(&mp_state, argp, sizeof mp_state)) |
| 2032 | goto out; |
| 2033 | r = kvm_arch_vcpu_ioctl_set_mpstate(vcpu, &mp_state); |
Marcelo Tosatti | 62d9f0d | 2008-04-11 13:24:45 -0300 | [diff] [blame] | 2034 | break; |
| 2035 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2036 | case KVM_TRANSLATE: { |
| 2037 | struct kvm_translation tr; |
| 2038 | |
| 2039 | r = -EFAULT; |
Al Viro | 2f366987 | 2007-02-09 16:38:35 +0000 | [diff] [blame] | 2040 | if (copy_from_user(&tr, argp, sizeof tr)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2041 | goto out; |
Zhang Xiantao | 8b00679 | 2007-11-16 13:05:55 +0800 | [diff] [blame] | 2042 | r = kvm_arch_vcpu_ioctl_translate(vcpu, &tr); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2043 | if (r) |
| 2044 | goto out; |
| 2045 | r = -EFAULT; |
Al Viro | 2f366987 | 2007-02-09 16:38:35 +0000 | [diff] [blame] | 2046 | if (copy_to_user(argp, &tr, sizeof tr)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2047 | goto out; |
| 2048 | r = 0; |
| 2049 | break; |
| 2050 | } |
Jan Kiszka | d0bfb94 | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 2051 | case KVM_SET_GUEST_DEBUG: { |
| 2052 | struct kvm_guest_debug dbg; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2053 | |
| 2054 | r = -EFAULT; |
Al Viro | 2f366987 | 2007-02-09 16:38:35 +0000 | [diff] [blame] | 2055 | if (copy_from_user(&dbg, argp, sizeof dbg)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2056 | goto out; |
Jan Kiszka | d0bfb94 | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 2057 | r = kvm_arch_vcpu_ioctl_set_guest_debug(vcpu, &dbg); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2058 | break; |
| 2059 | } |
Avi Kivity | 1961d27 | 2007-03-05 19:46:05 +0200 | [diff] [blame] | 2060 | case KVM_SET_SIGNAL_MASK: { |
| 2061 | struct kvm_signal_mask __user *sigmask_arg = argp; |
| 2062 | struct kvm_signal_mask kvm_sigmask; |
| 2063 | sigset_t sigset, *p; |
| 2064 | |
| 2065 | p = NULL; |
| 2066 | if (argp) { |
| 2067 | r = -EFAULT; |
| 2068 | if (copy_from_user(&kvm_sigmask, argp, |
| 2069 | sizeof kvm_sigmask)) |
| 2070 | goto out; |
| 2071 | r = -EINVAL; |
| 2072 | if (kvm_sigmask.len != sizeof sigset) |
| 2073 | goto out; |
| 2074 | r = -EFAULT; |
| 2075 | if (copy_from_user(&sigset, sigmask_arg->sigset, |
| 2076 | sizeof sigset)) |
| 2077 | goto out; |
| 2078 | p = &sigset; |
| 2079 | } |
Andi Kleen | 376d41f | 2010-06-10 13:10:47 +0200 | [diff] [blame] | 2080 | r = kvm_vcpu_ioctl_set_sigmask(vcpu, p); |
Avi Kivity | 1961d27 | 2007-03-05 19:46:05 +0200 | [diff] [blame] | 2081 | break; |
| 2082 | } |
Avi Kivity | b883673 | 2007-04-01 16:34:31 +0300 | [diff] [blame] | 2083 | case KVM_GET_FPU: { |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 2084 | fpu = kzalloc(sizeof(struct kvm_fpu), GFP_KERNEL); |
| 2085 | r = -ENOMEM; |
| 2086 | if (!fpu) |
| 2087 | goto out; |
| 2088 | r = kvm_arch_vcpu_ioctl_get_fpu(vcpu, fpu); |
Avi Kivity | b883673 | 2007-04-01 16:34:31 +0300 | [diff] [blame] | 2089 | if (r) |
| 2090 | goto out; |
| 2091 | r = -EFAULT; |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 2092 | if (copy_to_user(argp, fpu, sizeof(struct kvm_fpu))) |
Avi Kivity | b883673 | 2007-04-01 16:34:31 +0300 | [diff] [blame] | 2093 | goto out; |
| 2094 | r = 0; |
| 2095 | break; |
| 2096 | } |
| 2097 | case KVM_SET_FPU: { |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 2098 | fpu = memdup_user(argp, sizeof(*fpu)); |
| 2099 | if (IS_ERR(fpu)) { |
| 2100 | r = PTR_ERR(fpu); |
Guo Chao | 1859541 | 2012-11-02 18:33:21 +0800 | [diff] [blame] | 2101 | fpu = NULL; |
Avi Kivity | b883673 | 2007-04-01 16:34:31 +0300 | [diff] [blame] | 2102 | goto out; |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 2103 | } |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 2104 | r = kvm_arch_vcpu_ioctl_set_fpu(vcpu, fpu); |
Avi Kivity | b883673 | 2007-04-01 16:34:31 +0300 | [diff] [blame] | 2105 | break; |
| 2106 | } |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2107 | default: |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 2108 | r = kvm_arch_vcpu_ioctl(filp, ioctl, arg); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2109 | } |
| 2110 | out: |
Avi Kivity | 2122ff5 | 2010-05-13 11:25:04 +0300 | [diff] [blame] | 2111 | vcpu_put(vcpu); |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 2112 | kfree(fpu); |
| 2113 | kfree(kvm_sregs); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2114 | return r; |
| 2115 | } |
| 2116 | |
Alexander Graf | 1dda606 | 2011-06-08 02:45:37 +0200 | [diff] [blame] | 2117 | #ifdef CONFIG_COMPAT |
| 2118 | static long kvm_vcpu_compat_ioctl(struct file *filp, |
| 2119 | unsigned int ioctl, unsigned long arg) |
| 2120 | { |
| 2121 | struct kvm_vcpu *vcpu = filp->private_data; |
| 2122 | void __user *argp = compat_ptr(arg); |
| 2123 | int r; |
| 2124 | |
| 2125 | if (vcpu->kvm->mm != current->mm) |
| 2126 | return -EIO; |
| 2127 | |
| 2128 | switch (ioctl) { |
| 2129 | case KVM_SET_SIGNAL_MASK: { |
| 2130 | struct kvm_signal_mask __user *sigmask_arg = argp; |
| 2131 | struct kvm_signal_mask kvm_sigmask; |
| 2132 | compat_sigset_t csigset; |
| 2133 | sigset_t sigset; |
| 2134 | |
| 2135 | if (argp) { |
| 2136 | r = -EFAULT; |
| 2137 | if (copy_from_user(&kvm_sigmask, argp, |
| 2138 | sizeof kvm_sigmask)) |
| 2139 | goto out; |
| 2140 | r = -EINVAL; |
| 2141 | if (kvm_sigmask.len != sizeof csigset) |
| 2142 | goto out; |
| 2143 | r = -EFAULT; |
| 2144 | if (copy_from_user(&csigset, sigmask_arg->sigset, |
| 2145 | sizeof csigset)) |
| 2146 | goto out; |
Alan Cox | 760a9a3 | 2012-08-22 14:34:11 +0100 | [diff] [blame] | 2147 | sigset_from_compat(&sigset, &csigset); |
| 2148 | r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset); |
| 2149 | } else |
| 2150 | r = kvm_vcpu_ioctl_set_sigmask(vcpu, NULL); |
Alexander Graf | 1dda606 | 2011-06-08 02:45:37 +0200 | [diff] [blame] | 2151 | break; |
| 2152 | } |
| 2153 | default: |
| 2154 | r = kvm_vcpu_ioctl(filp, ioctl, arg); |
| 2155 | } |
| 2156 | |
| 2157 | out: |
| 2158 | return r; |
| 2159 | } |
| 2160 | #endif |
| 2161 | |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2162 | static long kvm_vm_ioctl(struct file *filp, |
| 2163 | unsigned int ioctl, unsigned long arg) |
| 2164 | { |
| 2165 | struct kvm *kvm = filp->private_data; |
| 2166 | void __user *argp = (void __user *)arg; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2167 | int r; |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2168 | |
Avi Kivity | 6d4e4c4 | 2007-11-21 16:41:05 +0200 | [diff] [blame] | 2169 | if (kvm->mm != current->mm) |
| 2170 | return -EIO; |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2171 | switch (ioctl) { |
| 2172 | case KVM_CREATE_VCPU: |
| 2173 | r = kvm_vm_ioctl_create_vcpu(kvm, arg); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2174 | break; |
Izik Eidus | 6fc138d | 2007-10-09 19:20:39 +0200 | [diff] [blame] | 2175 | case KVM_SET_USER_MEMORY_REGION: { |
| 2176 | struct kvm_userspace_memory_region kvm_userspace_mem; |
| 2177 | |
| 2178 | r = -EFAULT; |
| 2179 | if (copy_from_user(&kvm_userspace_mem, argp, |
| 2180 | sizeof kvm_userspace_mem)) |
| 2181 | goto out; |
| 2182 | |
Takuya Yoshikawa | 47ae31e | 2013-02-27 19:43:00 +0900 | [diff] [blame] | 2183 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2184 | break; |
| 2185 | } |
| 2186 | case KVM_GET_DIRTY_LOG: { |
| 2187 | struct kvm_dirty_log log; |
| 2188 | |
| 2189 | r = -EFAULT; |
Al Viro | 2f366987 | 2007-02-09 16:38:35 +0000 | [diff] [blame] | 2190 | if (copy_from_user(&log, argp, sizeof log)) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2191 | goto out; |
Avi Kivity | 2c6f5df | 2007-02-20 18:27:58 +0200 | [diff] [blame] | 2192 | r = kvm_vm_ioctl_get_dirty_log(kvm, &log); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2193 | break; |
| 2194 | } |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2195 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
| 2196 | case KVM_REGISTER_COALESCED_MMIO: { |
| 2197 | struct kvm_coalesced_mmio_zone zone; |
| 2198 | r = -EFAULT; |
| 2199 | if (copy_from_user(&zone, argp, sizeof zone)) |
| 2200 | goto out; |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2201 | r = kvm_vm_ioctl_register_coalesced_mmio(kvm, &zone); |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2202 | break; |
| 2203 | } |
| 2204 | case KVM_UNREGISTER_COALESCED_MMIO: { |
| 2205 | struct kvm_coalesced_mmio_zone zone; |
| 2206 | r = -EFAULT; |
| 2207 | if (copy_from_user(&zone, argp, sizeof zone)) |
| 2208 | goto out; |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2209 | r = kvm_vm_ioctl_unregister_coalesced_mmio(kvm, &zone); |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2210 | break; |
| 2211 | } |
| 2212 | #endif |
Gregory Haskins | 721eecb | 2009-05-20 10:30:49 -0400 | [diff] [blame] | 2213 | case KVM_IRQFD: { |
| 2214 | struct kvm_irqfd data; |
| 2215 | |
| 2216 | r = -EFAULT; |
| 2217 | if (copy_from_user(&data, argp, sizeof data)) |
| 2218 | goto out; |
Alex Williamson | d4db293 | 2012-06-29 09:56:08 -0600 | [diff] [blame] | 2219 | r = kvm_irqfd(kvm, &data); |
Gregory Haskins | 721eecb | 2009-05-20 10:30:49 -0400 | [diff] [blame] | 2220 | break; |
| 2221 | } |
Gregory Haskins | d34e6b1 | 2009-07-07 17:08:49 -0400 | [diff] [blame] | 2222 | case KVM_IOEVENTFD: { |
| 2223 | struct kvm_ioeventfd data; |
| 2224 | |
| 2225 | r = -EFAULT; |
| 2226 | if (copy_from_user(&data, argp, sizeof data)) |
| 2227 | goto out; |
| 2228 | r = kvm_ioeventfd(kvm, &data); |
| 2229 | break; |
| 2230 | } |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 2231 | #ifdef CONFIG_KVM_APIC_ARCHITECTURE |
| 2232 | case KVM_SET_BOOT_CPU_ID: |
| 2233 | r = 0; |
Marcelo Tosatti | 894a9c5 | 2009-06-23 15:05:14 -0300 | [diff] [blame] | 2234 | mutex_lock(&kvm->lock); |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 2235 | if (atomic_read(&kvm->online_vcpus) != 0) |
| 2236 | r = -EBUSY; |
| 2237 | else |
| 2238 | kvm->bsp_vcpu_id = arg; |
Marcelo Tosatti | 894a9c5 | 2009-06-23 15:05:14 -0300 | [diff] [blame] | 2239 | mutex_unlock(&kvm->lock); |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 2240 | break; |
| 2241 | #endif |
Jan Kiszka | 07975ad | 2012-03-29 21:14:12 +0200 | [diff] [blame] | 2242 | #ifdef CONFIG_HAVE_KVM_MSI |
| 2243 | case KVM_SIGNAL_MSI: { |
| 2244 | struct kvm_msi msi; |
| 2245 | |
| 2246 | r = -EFAULT; |
| 2247 | if (copy_from_user(&msi, argp, sizeof msi)) |
| 2248 | goto out; |
| 2249 | r = kvm_send_userspace_msi(kvm, &msi); |
| 2250 | break; |
| 2251 | } |
| 2252 | #endif |
Christoffer Dall | 23d43cf | 2012-07-24 08:51:20 -0400 | [diff] [blame] | 2253 | #ifdef __KVM_HAVE_IRQ_LINE |
| 2254 | case KVM_IRQ_LINE_STATUS: |
| 2255 | case KVM_IRQ_LINE: { |
| 2256 | struct kvm_irq_level irq_event; |
| 2257 | |
| 2258 | r = -EFAULT; |
| 2259 | if (copy_from_user(&irq_event, argp, sizeof irq_event)) |
| 2260 | goto out; |
| 2261 | |
Yang Zhang | aa2fbe6 | 2013-04-11 19:21:40 +0800 | [diff] [blame] | 2262 | r = kvm_vm_ioctl_irq_line(kvm, &irq_event, |
| 2263 | ioctl == KVM_IRQ_LINE_STATUS); |
Christoffer Dall | 23d43cf | 2012-07-24 08:51:20 -0400 | [diff] [blame] | 2264 | if (r) |
| 2265 | goto out; |
| 2266 | |
| 2267 | r = -EFAULT; |
| 2268 | if (ioctl == KVM_IRQ_LINE_STATUS) { |
| 2269 | if (copy_to_user(argp, &irq_event, sizeof irq_event)) |
| 2270 | goto out; |
| 2271 | } |
| 2272 | |
| 2273 | r = 0; |
| 2274 | break; |
| 2275 | } |
| 2276 | #endif |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2277 | default: |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2278 | r = kvm_arch_vm_ioctl(filp, ioctl, arg); |
Avi Kivity | bfd99ff | 2009-08-26 14:57:50 +0300 | [diff] [blame] | 2279 | if (r == -ENOTTY) |
| 2280 | r = kvm_vm_ioctl_assigned_device(kvm, ioctl, arg); |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2281 | } |
| 2282 | out: |
| 2283 | return r; |
| 2284 | } |
| 2285 | |
Arnd Bergmann | 6ff5894 | 2009-10-22 14:19:27 +0200 | [diff] [blame] | 2286 | #ifdef CONFIG_COMPAT |
| 2287 | struct compat_kvm_dirty_log { |
| 2288 | __u32 slot; |
| 2289 | __u32 padding1; |
| 2290 | union { |
| 2291 | compat_uptr_t dirty_bitmap; /* one bit per page */ |
| 2292 | __u64 padding2; |
| 2293 | }; |
| 2294 | }; |
| 2295 | |
| 2296 | static long kvm_vm_compat_ioctl(struct file *filp, |
| 2297 | unsigned int ioctl, unsigned long arg) |
| 2298 | { |
| 2299 | struct kvm *kvm = filp->private_data; |
| 2300 | int r; |
| 2301 | |
| 2302 | if (kvm->mm != current->mm) |
| 2303 | return -EIO; |
| 2304 | switch (ioctl) { |
| 2305 | case KVM_GET_DIRTY_LOG: { |
| 2306 | struct compat_kvm_dirty_log compat_log; |
| 2307 | struct kvm_dirty_log log; |
| 2308 | |
| 2309 | r = -EFAULT; |
| 2310 | if (copy_from_user(&compat_log, (void __user *)arg, |
| 2311 | sizeof(compat_log))) |
| 2312 | goto out; |
| 2313 | log.slot = compat_log.slot; |
| 2314 | log.padding1 = compat_log.padding1; |
| 2315 | log.padding2 = compat_log.padding2; |
| 2316 | log.dirty_bitmap = compat_ptr(compat_log.dirty_bitmap); |
| 2317 | |
| 2318 | r = kvm_vm_ioctl_get_dirty_log(kvm, &log); |
Arnd Bergmann | 6ff5894 | 2009-10-22 14:19:27 +0200 | [diff] [blame] | 2319 | break; |
| 2320 | } |
| 2321 | default: |
| 2322 | r = kvm_vm_ioctl(filp, ioctl, arg); |
| 2323 | } |
| 2324 | |
| 2325 | out: |
| 2326 | return r; |
| 2327 | } |
| 2328 | #endif |
| 2329 | |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 2330 | 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] | 2331 | { |
Marcelo Tosatti | 777b3f4 | 2008-09-16 20:54:46 -0300 | [diff] [blame] | 2332 | struct page *page[1]; |
| 2333 | unsigned long addr; |
| 2334 | int npages; |
| 2335 | gfn_t gfn = vmf->pgoff; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2336 | struct kvm *kvm = vma->vm_file->private_data; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2337 | |
Marcelo Tosatti | 777b3f4 | 2008-09-16 20:54:46 -0300 | [diff] [blame] | 2338 | addr = gfn_to_hva(kvm, gfn); |
| 2339 | if (kvm_is_error_hva(addr)) |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 2340 | return VM_FAULT_SIGBUS; |
Marcelo Tosatti | 777b3f4 | 2008-09-16 20:54:46 -0300 | [diff] [blame] | 2341 | |
| 2342 | npages = get_user_pages(current, current->mm, addr, 1, 1, 0, page, |
| 2343 | NULL); |
| 2344 | if (unlikely(npages != 1)) |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 2345 | return VM_FAULT_SIGBUS; |
Marcelo Tosatti | 777b3f4 | 2008-09-16 20:54:46 -0300 | [diff] [blame] | 2346 | |
| 2347 | vmf->page = page[0]; |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 2348 | return 0; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2349 | } |
| 2350 | |
Alexey Dobriyan | f0f37e2 | 2009-09-27 22:29:37 +0400 | [diff] [blame] | 2351 | static const struct vm_operations_struct kvm_vm_vm_ops = { |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 2352 | .fault = kvm_vm_fault, |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2353 | }; |
| 2354 | |
| 2355 | static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma) |
| 2356 | { |
| 2357 | vma->vm_ops = &kvm_vm_vm_ops; |
| 2358 | return 0; |
| 2359 | } |
| 2360 | |
Christian Borntraeger | 3d3aab1 | 2008-12-02 11:17:32 +0100 | [diff] [blame] | 2361 | static struct file_operations kvm_vm_fops = { |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2362 | .release = kvm_vm_release, |
| 2363 | .unlocked_ioctl = kvm_vm_ioctl, |
Arnd Bergmann | 6ff5894 | 2009-10-22 14:19:27 +0200 | [diff] [blame] | 2364 | #ifdef CONFIG_COMPAT |
| 2365 | .compat_ioctl = kvm_vm_compat_ioctl, |
| 2366 | #endif |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2367 | .mmap = kvm_vm_mmap, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 2368 | .llseek = noop_llseek, |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2369 | }; |
| 2370 | |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 2371 | static int kvm_dev_ioctl_create_vm(unsigned long type) |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2372 | { |
Heiko Carstens | aac8763 | 2010-10-27 17:22:10 +0200 | [diff] [blame] | 2373 | int r; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2374 | struct kvm *kvm; |
| 2375 | |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 2376 | kvm = kvm_create_vm(type); |
Avi Kivity | d6d2816 | 2007-06-28 08:38:16 -0400 | [diff] [blame] | 2377 | if (IS_ERR(kvm)) |
| 2378 | return PTR_ERR(kvm); |
Takuya Yoshikawa | 6ce5a09 | 2010-03-15 22:13:30 +0900 | [diff] [blame] | 2379 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
| 2380 | r = kvm_coalesced_mmio_init(kvm); |
| 2381 | if (r < 0) { |
| 2382 | kvm_put_kvm(kvm); |
| 2383 | return r; |
| 2384 | } |
| 2385 | #endif |
Heiko Carstens | aac8763 | 2010-10-27 17:22:10 +0200 | [diff] [blame] | 2386 | r = anon_inode_getfd("kvm-vm", &kvm_vm_fops, kvm, O_RDWR); |
| 2387 | if (r < 0) |
Al Viro | 66c0b39 | 2008-04-19 20:33:56 +0100 | [diff] [blame] | 2388 | kvm_put_kvm(kvm); |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2389 | |
Heiko Carstens | aac8763 | 2010-10-27 17:22:10 +0200 | [diff] [blame] | 2390 | return r; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2391 | } |
| 2392 | |
Avi Kivity | 1a811b6 | 2008-12-08 18:25:27 +0200 | [diff] [blame] | 2393 | static long kvm_dev_ioctl_check_extension_generic(long arg) |
| 2394 | { |
| 2395 | switch (arg) { |
Avi Kivity | ca9edae | 2008-12-08 18:29:29 +0200 | [diff] [blame] | 2396 | case KVM_CAP_USER_MEMORY: |
Avi Kivity | 1a811b6 | 2008-12-08 18:25:27 +0200 | [diff] [blame] | 2397 | case KVM_CAP_DESTROY_MEMORY_REGION_WORKS: |
Jan Kiszka | 4cd481f | 2009-04-13 11:59:32 +0200 | [diff] [blame] | 2398 | case KVM_CAP_JOIN_MEMORY_REGIONS_WORKS: |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 2399 | #ifdef CONFIG_KVM_APIC_ARCHITECTURE |
| 2400 | case KVM_CAP_SET_BOOT_CPU_ID: |
| 2401 | #endif |
Avi Kivity | a9c7399 | 2009-11-04 11:54:59 +0200 | [diff] [blame] | 2402 | case KVM_CAP_INTERNAL_ERROR_DATA: |
Jan Kiszka | 07975ad | 2012-03-29 21:14:12 +0200 | [diff] [blame] | 2403 | #ifdef CONFIG_HAVE_KVM_MSI |
| 2404 | case KVM_CAP_SIGNAL_MSI: |
| 2405 | #endif |
Avi Kivity | 1a811b6 | 2008-12-08 18:25:27 +0200 | [diff] [blame] | 2406 | return 1; |
Marc Zyngier | 9900b4b | 2012-06-15 15:07:02 -0400 | [diff] [blame] | 2407 | #ifdef KVM_CAP_IRQ_ROUTING |
Avi Kivity | 399ec80 | 2008-11-19 13:58:46 +0200 | [diff] [blame] | 2408 | case KVM_CAP_IRQ_ROUTING: |
Sheng Yang | 3646314 | 2009-03-16 16:33:43 +0800 | [diff] [blame] | 2409 | return KVM_MAX_IRQ_ROUTES; |
Avi Kivity | 399ec80 | 2008-11-19 13:58:46 +0200 | [diff] [blame] | 2410 | #endif |
Avi Kivity | 1a811b6 | 2008-12-08 18:25:27 +0200 | [diff] [blame] | 2411 | default: |
| 2412 | break; |
| 2413 | } |
| 2414 | return kvm_dev_ioctl_check_extension(arg); |
| 2415 | } |
| 2416 | |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2417 | static long kvm_dev_ioctl(struct file *filp, |
| 2418 | unsigned int ioctl, unsigned long arg) |
| 2419 | { |
Avi Kivity | 07c45a3 | 2007-03-07 13:05:38 +0200 | [diff] [blame] | 2420 | long r = -EINVAL; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2421 | |
| 2422 | switch (ioctl) { |
| 2423 | case KVM_GET_API_VERSION: |
Avi Kivity | f0fe510 | 2007-03-07 13:11:17 +0200 | [diff] [blame] | 2424 | r = -EINVAL; |
| 2425 | if (arg) |
| 2426 | goto out; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2427 | r = KVM_API_VERSION; |
| 2428 | break; |
| 2429 | case KVM_CREATE_VM: |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 2430 | r = kvm_dev_ioctl_create_vm(arg); |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2431 | break; |
Zhang Xiantao | 018d00d | 2007-11-15 23:07:47 +0800 | [diff] [blame] | 2432 | case KVM_CHECK_EXTENSION: |
Avi Kivity | 1a811b6 | 2008-12-08 18:25:27 +0200 | [diff] [blame] | 2433 | r = kvm_dev_ioctl_check_extension_generic(arg); |
Avi Kivity | 5d308f4 | 2007-03-01 17:56:20 +0200 | [diff] [blame] | 2434 | break; |
Avi Kivity | 07c45a3 | 2007-03-07 13:05:38 +0200 | [diff] [blame] | 2435 | case KVM_GET_VCPU_MMAP_SIZE: |
| 2436 | r = -EINVAL; |
| 2437 | if (arg) |
| 2438 | goto out; |
Avi Kivity | adb1ff4 | 2008-01-24 15:13:08 +0200 | [diff] [blame] | 2439 | r = PAGE_SIZE; /* struct kvm_run */ |
| 2440 | #ifdef CONFIG_X86 |
| 2441 | r += PAGE_SIZE; /* pio data page */ |
| 2442 | #endif |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2443 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
| 2444 | r += PAGE_SIZE; /* coalesced mmio ring page */ |
| 2445 | #endif |
Avi Kivity | 07c45a3 | 2007-03-07 13:05:38 +0200 | [diff] [blame] | 2446 | break; |
Feng(Eric) Liu | d4c9ff2 | 2008-04-10 08:47:53 -0400 | [diff] [blame] | 2447 | case KVM_TRACE_ENABLE: |
| 2448 | case KVM_TRACE_PAUSE: |
| 2449 | case KVM_TRACE_DISABLE: |
Marcelo Tosatti | 2023a29 | 2009-06-18 11:47:28 -0300 | [diff] [blame] | 2450 | r = -EOPNOTSUPP; |
Feng(Eric) Liu | d4c9ff2 | 2008-04-10 08:47:53 -0400 | [diff] [blame] | 2451 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2452 | default: |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 2453 | return kvm_arch_dev_ioctl(filp, ioctl, arg); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2454 | } |
| 2455 | out: |
| 2456 | return r; |
| 2457 | } |
| 2458 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2459 | static struct file_operations kvm_chardev_ops = { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2460 | .unlocked_ioctl = kvm_dev_ioctl, |
| 2461 | .compat_ioctl = kvm_dev_ioctl, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 2462 | .llseek = noop_llseek, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2463 | }; |
| 2464 | |
| 2465 | static struct miscdevice kvm_dev = { |
Avi Kivity | bbe4432 | 2007-03-04 13:27:36 +0200 | [diff] [blame] | 2466 | KVM_MINOR, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2467 | "kvm", |
| 2468 | &kvm_chardev_ops, |
| 2469 | }; |
| 2470 | |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2471 | static void hardware_enable_nolock(void *junk) |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 2472 | { |
| 2473 | int cpu = raw_smp_processor_id(); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2474 | int r; |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 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; |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2478 | |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 2479 | cpumask_set_cpu(cpu, cpus_hardware_enabled); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2480 | |
| 2481 | r = kvm_arch_hardware_enable(NULL); |
| 2482 | |
| 2483 | if (r) { |
| 2484 | cpumask_clear_cpu(cpu, cpus_hardware_enabled); |
| 2485 | atomic_inc(&hardware_enable_failed); |
| 2486 | printk(KERN_INFO "kvm: enabling virtualization on " |
| 2487 | "CPU%d failed\n", cpu); |
| 2488 | } |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 2489 | } |
| 2490 | |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2491 | static void hardware_enable(void *junk) |
| 2492 | { |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2493 | raw_spin_lock(&kvm_lock); |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2494 | hardware_enable_nolock(junk); |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2495 | raw_spin_unlock(&kvm_lock); |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2496 | } |
| 2497 | |
| 2498 | static void hardware_disable_nolock(void *junk) |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 2499 | { |
| 2500 | int cpu = raw_smp_processor_id(); |
| 2501 | |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 2502 | if (!cpumask_test_cpu(cpu, cpus_hardware_enabled)) |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 2503 | return; |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 2504 | cpumask_clear_cpu(cpu, cpus_hardware_enabled); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 2505 | kvm_arch_hardware_disable(NULL); |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 2506 | } |
| 2507 | |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2508 | static void hardware_disable(void *junk) |
| 2509 | { |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2510 | raw_spin_lock(&kvm_lock); |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2511 | hardware_disable_nolock(junk); |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2512 | raw_spin_unlock(&kvm_lock); |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2513 | } |
| 2514 | |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2515 | static void hardware_disable_all_nolock(void) |
| 2516 | { |
| 2517 | BUG_ON(!kvm_usage_count); |
| 2518 | |
| 2519 | kvm_usage_count--; |
| 2520 | if (!kvm_usage_count) |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2521 | on_each_cpu(hardware_disable_nolock, NULL, 1); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2522 | } |
| 2523 | |
| 2524 | static void hardware_disable_all(void) |
| 2525 | { |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2526 | raw_spin_lock(&kvm_lock); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2527 | hardware_disable_all_nolock(); |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2528 | raw_spin_unlock(&kvm_lock); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2529 | } |
| 2530 | |
| 2531 | static int hardware_enable_all(void) |
| 2532 | { |
| 2533 | int r = 0; |
| 2534 | |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2535 | raw_spin_lock(&kvm_lock); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2536 | |
| 2537 | kvm_usage_count++; |
| 2538 | if (kvm_usage_count == 1) { |
| 2539 | atomic_set(&hardware_enable_failed, 0); |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2540 | on_each_cpu(hardware_enable_nolock, NULL, 1); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2541 | |
| 2542 | if (atomic_read(&hardware_enable_failed)) { |
| 2543 | hardware_disable_all_nolock(); |
| 2544 | r = -EBUSY; |
| 2545 | } |
| 2546 | } |
| 2547 | |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2548 | raw_spin_unlock(&kvm_lock); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2549 | |
| 2550 | return r; |
| 2551 | } |
| 2552 | |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 2553 | static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val, |
| 2554 | void *v) |
| 2555 | { |
| 2556 | int cpu = (long)v; |
| 2557 | |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2558 | if (!kvm_usage_count) |
| 2559 | return NOTIFY_OK; |
| 2560 | |
Avi Kivity | 1a6f4d7 | 2007-11-11 18:37:32 +0200 | [diff] [blame] | 2561 | val &= ~CPU_TASKS_FROZEN; |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 2562 | switch (val) { |
Avi Kivity | cec9ad2 | 2007-05-24 13:11:41 +0300 | [diff] [blame] | 2563 | case CPU_DYING: |
Avi Kivity | 6ec8a856 | 2007-08-19 15:57:26 +0300 | [diff] [blame] | 2564 | printk(KERN_INFO "kvm: disabling virtualization on CPU%d\n", |
| 2565 | cpu); |
| 2566 | hardware_disable(NULL); |
| 2567 | break; |
Zachary Amsden | da908f2 | 2010-08-19 22:07:27 -1000 | [diff] [blame] | 2568 | case CPU_STARTING: |
Jeremy Katz | 43934a3 | 2007-02-19 14:37:46 +0200 | [diff] [blame] | 2569 | printk(KERN_INFO "kvm: enabling virtualization on CPU%d\n", |
| 2570 | cpu); |
Zachary Amsden | da908f2 | 2010-08-19 22:07:27 -1000 | [diff] [blame] | 2571 | hardware_enable(NULL); |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 2572 | break; |
| 2573 | } |
| 2574 | return NOTIFY_OK; |
| 2575 | } |
| 2576 | |
Rusty Russell | 9a2b85c | 2007-07-17 23:17:55 +1000 | [diff] [blame] | 2577 | static int kvm_reboot(struct notifier_block *notifier, unsigned long val, |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 2578 | void *v) |
Rusty Russell | 9a2b85c | 2007-07-17 23:17:55 +1000 | [diff] [blame] | 2579 | { |
Sheng Yang | 8e1c181 | 2009-04-29 11:09:04 +0800 | [diff] [blame] | 2580 | /* |
| 2581 | * Some (well, at least mine) BIOSes hang on reboot if |
| 2582 | * in vmx root mode. |
| 2583 | * |
| 2584 | * And Intel TXT required VMX off for all cpu when system shutdown. |
| 2585 | */ |
| 2586 | printk(KERN_INFO "kvm: exiting hardware virtualization\n"); |
| 2587 | kvm_rebooting = true; |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2588 | on_each_cpu(hardware_disable_nolock, NULL, 1); |
Rusty Russell | 9a2b85c | 2007-07-17 23:17:55 +1000 | [diff] [blame] | 2589 | return NOTIFY_OK; |
| 2590 | } |
| 2591 | |
| 2592 | static struct notifier_block kvm_reboot_notifier = { |
| 2593 | .notifier_call = kvm_reboot, |
| 2594 | .priority = 0, |
| 2595 | }; |
| 2596 | |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2597 | static void kvm_io_bus_destroy(struct kvm_io_bus *bus) |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 2598 | { |
| 2599 | int i; |
| 2600 | |
| 2601 | for (i = 0; i < bus->dev_count; i++) { |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2602 | struct kvm_io_device *pos = bus->range[i].dev; |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 2603 | |
| 2604 | kvm_iodevice_destructor(pos); |
| 2605 | } |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2606 | kfree(bus); |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 2607 | } |
| 2608 | |
Geoff Levand | 39369f7 | 2013-04-05 19:20:30 +0000 | [diff] [blame] | 2609 | static int kvm_io_bus_sort_cmp(const void *p1, const void *p2) |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2610 | { |
| 2611 | const struct kvm_io_range *r1 = p1; |
| 2612 | const struct kvm_io_range *r2 = p2; |
| 2613 | |
| 2614 | if (r1->addr < r2->addr) |
| 2615 | return -1; |
| 2616 | if (r1->addr + r1->len > r2->addr + r2->len) |
| 2617 | return 1; |
| 2618 | return 0; |
| 2619 | } |
| 2620 | |
Geoff Levand | 39369f7 | 2013-04-05 19:20:30 +0000 | [diff] [blame] | 2621 | static int kvm_io_bus_insert_dev(struct kvm_io_bus *bus, struct kvm_io_device *dev, |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2622 | gpa_t addr, int len) |
| 2623 | { |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2624 | bus->range[bus->dev_count++] = (struct kvm_io_range) { |
| 2625 | .addr = addr, |
| 2626 | .len = len, |
| 2627 | .dev = dev, |
| 2628 | }; |
| 2629 | |
| 2630 | sort(bus->range, bus->dev_count, sizeof(struct kvm_io_range), |
| 2631 | kvm_io_bus_sort_cmp, NULL); |
| 2632 | |
| 2633 | return 0; |
| 2634 | } |
| 2635 | |
Geoff Levand | 39369f7 | 2013-04-05 19:20:30 +0000 | [diff] [blame] | 2636 | static int kvm_io_bus_get_first_dev(struct kvm_io_bus *bus, |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2637 | gpa_t addr, int len) |
| 2638 | { |
| 2639 | struct kvm_io_range *range, key; |
| 2640 | int off; |
| 2641 | |
| 2642 | key = (struct kvm_io_range) { |
| 2643 | .addr = addr, |
| 2644 | .len = len, |
| 2645 | }; |
| 2646 | |
| 2647 | range = bsearch(&key, bus->range, bus->dev_count, |
| 2648 | sizeof(struct kvm_io_range), kvm_io_bus_sort_cmp); |
| 2649 | if (range == NULL) |
| 2650 | return -ENOENT; |
| 2651 | |
| 2652 | off = range - bus->range; |
| 2653 | |
| 2654 | while (off > 0 && kvm_io_bus_sort_cmp(&key, &bus->range[off-1]) == 0) |
| 2655 | off--; |
| 2656 | |
| 2657 | return off; |
| 2658 | } |
| 2659 | |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 2660 | /* kvm_io_bus_write - called under kvm->slots_lock */ |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2661 | 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] | 2662 | int len, const void *val) |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 2663 | { |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2664 | int idx; |
Lai Jiangshan | 90d83dc | 2010-04-19 17:41:23 +0800 | [diff] [blame] | 2665 | struct kvm_io_bus *bus; |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2666 | struct kvm_io_range range; |
| 2667 | |
| 2668 | range = (struct kvm_io_range) { |
| 2669 | .addr = addr, |
| 2670 | .len = len, |
| 2671 | }; |
Lai Jiangshan | 90d83dc | 2010-04-19 17:41:23 +0800 | [diff] [blame] | 2672 | |
| 2673 | bus = srcu_dereference(kvm->buses[bus_idx], &kvm->srcu); |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2674 | idx = kvm_io_bus_get_first_dev(bus, addr, len); |
| 2675 | if (idx < 0) |
| 2676 | return -EOPNOTSUPP; |
| 2677 | |
| 2678 | while (idx < bus->dev_count && |
| 2679 | kvm_io_bus_sort_cmp(&range, &bus->range[idx]) == 0) { |
| 2680 | if (!kvm_iodevice_write(bus->range[idx].dev, addr, len, val)) |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 2681 | return 0; |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2682 | idx++; |
| 2683 | } |
| 2684 | |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 2685 | return -EOPNOTSUPP; |
| 2686 | } |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 2687 | |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 2688 | /* kvm_io_bus_read - called under kvm->slots_lock */ |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2689 | int kvm_io_bus_read(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, |
| 2690 | int len, void *val) |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 2691 | { |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2692 | int idx; |
Lai Jiangshan | 90d83dc | 2010-04-19 17:41:23 +0800 | [diff] [blame] | 2693 | struct kvm_io_bus *bus; |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2694 | struct kvm_io_range range; |
| 2695 | |
| 2696 | range = (struct kvm_io_range) { |
| 2697 | .addr = addr, |
| 2698 | .len = len, |
| 2699 | }; |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2700 | |
Lai Jiangshan | 90d83dc | 2010-04-19 17:41:23 +0800 | [diff] [blame] | 2701 | bus = srcu_dereference(kvm->buses[bus_idx], &kvm->srcu); |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2702 | idx = kvm_io_bus_get_first_dev(bus, addr, len); |
| 2703 | if (idx < 0) |
| 2704 | return -EOPNOTSUPP; |
| 2705 | |
| 2706 | while (idx < bus->dev_count && |
| 2707 | kvm_io_bus_sort_cmp(&range, &bus->range[idx]) == 0) { |
| 2708 | if (!kvm_iodevice_read(bus->range[idx].dev, addr, len, val)) |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 2709 | return 0; |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2710 | idx++; |
| 2711 | } |
| 2712 | |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 2713 | return -EOPNOTSUPP; |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 2714 | } |
| 2715 | |
Marcelo Tosatti | 79fac95 | 2009-12-23 14:35:26 -0200 | [diff] [blame] | 2716 | /* Caller must hold slots_lock. */ |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2717 | int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, |
| 2718 | int len, struct kvm_io_device *dev) |
Michael S. Tsirkin | 6c47469 | 2009-06-29 22:24:26 +0300 | [diff] [blame] | 2719 | { |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2720 | struct kvm_io_bus *new_bus, *bus; |
Gregory Haskins | 090b7af | 2009-07-07 17:08:44 -0400 | [diff] [blame] | 2721 | |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2722 | bus = kvm->buses[bus_idx]; |
Amos Kong | a1300716 | 2012-03-09 12:17:32 +0800 | [diff] [blame] | 2723 | if (bus->dev_count > NR_IOBUS_DEVS - 1) |
Gregory Haskins | 090b7af | 2009-07-07 17:08:44 -0400 | [diff] [blame] | 2724 | return -ENOSPC; |
| 2725 | |
Amos Kong | a1300716 | 2012-03-09 12:17:32 +0800 | [diff] [blame] | 2726 | new_bus = kzalloc(sizeof(*bus) + ((bus->dev_count + 1) * |
| 2727 | sizeof(struct kvm_io_range)), GFP_KERNEL); |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2728 | if (!new_bus) |
| 2729 | return -ENOMEM; |
Amos Kong | a1300716 | 2012-03-09 12:17:32 +0800 | [diff] [blame] | 2730 | memcpy(new_bus, bus, sizeof(*bus) + (bus->dev_count * |
| 2731 | sizeof(struct kvm_io_range))); |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2732 | kvm_io_bus_insert_dev(new_bus, dev, addr, len); |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2733 | rcu_assign_pointer(kvm->buses[bus_idx], new_bus); |
| 2734 | synchronize_srcu_expedited(&kvm->srcu); |
| 2735 | kfree(bus); |
Gregory Haskins | 090b7af | 2009-07-07 17:08:44 -0400 | [diff] [blame] | 2736 | |
| 2737 | return 0; |
| 2738 | } |
| 2739 | |
Marcelo Tosatti | 79fac95 | 2009-12-23 14:35:26 -0200 | [diff] [blame] | 2740 | /* Caller must hold slots_lock. */ |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2741 | int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx, |
| 2742 | struct kvm_io_device *dev) |
Gregory Haskins | 090b7af | 2009-07-07 17:08:44 -0400 | [diff] [blame] | 2743 | { |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2744 | int i, r; |
| 2745 | struct kvm_io_bus *new_bus, *bus; |
Michael S. Tsirkin | 6c47469 | 2009-06-29 22:24:26 +0300 | [diff] [blame] | 2746 | |
Sasha Levin | cdfca7b | 2011-12-04 19:36:28 +0200 | [diff] [blame] | 2747 | bus = kvm->buses[bus_idx]; |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2748 | r = -ENOENT; |
Amos Kong | a1300716 | 2012-03-09 12:17:32 +0800 | [diff] [blame] | 2749 | for (i = 0; i < bus->dev_count; i++) |
| 2750 | if (bus->range[i].dev == dev) { |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2751 | r = 0; |
Gregory Haskins | 090b7af | 2009-07-07 17:08:44 -0400 | [diff] [blame] | 2752 | break; |
| 2753 | } |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2754 | |
Amos Kong | a1300716 | 2012-03-09 12:17:32 +0800 | [diff] [blame] | 2755 | if (r) |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2756 | return r; |
Amos Kong | a1300716 | 2012-03-09 12:17:32 +0800 | [diff] [blame] | 2757 | |
| 2758 | new_bus = kzalloc(sizeof(*bus) + ((bus->dev_count - 1) * |
| 2759 | sizeof(struct kvm_io_range)), GFP_KERNEL); |
| 2760 | if (!new_bus) |
| 2761 | return -ENOMEM; |
| 2762 | |
| 2763 | memcpy(new_bus, bus, sizeof(*bus) + i * sizeof(struct kvm_io_range)); |
| 2764 | new_bus->dev_count--; |
| 2765 | memcpy(new_bus->range + i, bus->range + i + 1, |
| 2766 | (new_bus->dev_count - i) * sizeof(struct kvm_io_range)); |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2767 | |
| 2768 | rcu_assign_pointer(kvm->buses[bus_idx], new_bus); |
| 2769 | synchronize_srcu_expedited(&kvm->srcu); |
| 2770 | kfree(bus); |
| 2771 | return r; |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 2772 | } |
| 2773 | |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 2774 | static struct notifier_block kvm_cpu_notifier = { |
| 2775 | .notifier_call = kvm_cpu_hotplug, |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 2776 | }; |
| 2777 | |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 2778 | static int vm_stat_get(void *_offset, u64 *val) |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 2779 | { |
| 2780 | unsigned offset = (long)_offset; |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 2781 | struct kvm *kvm; |
| 2782 | |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 2783 | *val = 0; |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2784 | raw_spin_lock(&kvm_lock); |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 2785 | list_for_each_entry(kvm, &vm_list, vm_list) |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 2786 | *val += *(u32 *)((void *)kvm + offset); |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2787 | raw_spin_unlock(&kvm_lock); |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 2788 | return 0; |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 2789 | } |
| 2790 | |
| 2791 | DEFINE_SIMPLE_ATTRIBUTE(vm_stat_fops, vm_stat_get, NULL, "%llu\n"); |
| 2792 | |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 2793 | static int vcpu_stat_get(void *_offset, u64 *val) |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 2794 | { |
| 2795 | unsigned offset = (long)_offset; |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 2796 | struct kvm *kvm; |
| 2797 | struct kvm_vcpu *vcpu; |
| 2798 | int i; |
| 2799 | |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 2800 | *val = 0; |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2801 | raw_spin_lock(&kvm_lock); |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 2802 | list_for_each_entry(kvm, &vm_list, vm_list) |
Gleb Natapov | 988a2ca | 2009-06-09 15:56:29 +0300 | [diff] [blame] | 2803 | kvm_for_each_vcpu(i, vcpu, kvm) |
| 2804 | *val += *(u32 *)((void *)vcpu + offset); |
| 2805 | |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2806 | raw_spin_unlock(&kvm_lock); |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 2807 | return 0; |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 2808 | } |
| 2809 | |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 2810 | DEFINE_SIMPLE_ATTRIBUTE(vcpu_stat_fops, vcpu_stat_get, NULL, "%llu\n"); |
| 2811 | |
Alexey Dobriyan | 828c095 | 2009-10-01 15:43:56 -0700 | [diff] [blame] | 2812 | static const struct file_operations *stat_fops[] = { |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 2813 | [KVM_STAT_VCPU] = &vcpu_stat_fops, |
| 2814 | [KVM_STAT_VM] = &vm_stat_fops, |
| 2815 | }; |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 2816 | |
Hamo | 4f69b68 | 2011-12-15 14:23:16 +0800 | [diff] [blame] | 2817 | static int kvm_init_debug(void) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2818 | { |
Hamo | 4f69b68 | 2011-12-15 14:23:16 +0800 | [diff] [blame] | 2819 | int r = -EFAULT; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2820 | struct kvm_stats_debugfs_item *p; |
| 2821 | |
Hollis Blanchard | 76f7c87 | 2008-04-15 16:05:42 -0500 | [diff] [blame] | 2822 | kvm_debugfs_dir = debugfs_create_dir("kvm", NULL); |
Hamo | 4f69b68 | 2011-12-15 14:23:16 +0800 | [diff] [blame] | 2823 | if (kvm_debugfs_dir == NULL) |
| 2824 | goto out; |
| 2825 | |
| 2826 | for (p = debugfs_entries; p->name; ++p) { |
Hollis Blanchard | 76f7c87 | 2008-04-15 16:05:42 -0500 | [diff] [blame] | 2827 | p->dentry = debugfs_create_file(p->name, 0444, kvm_debugfs_dir, |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 2828 | (void *)(long)p->offset, |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 2829 | stat_fops[p->kind]); |
Hamo | 4f69b68 | 2011-12-15 14:23:16 +0800 | [diff] [blame] | 2830 | if (p->dentry == NULL) |
| 2831 | goto out_dir; |
| 2832 | } |
| 2833 | |
| 2834 | return 0; |
| 2835 | |
| 2836 | out_dir: |
| 2837 | debugfs_remove_recursive(kvm_debugfs_dir); |
| 2838 | out: |
| 2839 | return r; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2840 | } |
| 2841 | |
| 2842 | static void kvm_exit_debug(void) |
| 2843 | { |
| 2844 | struct kvm_stats_debugfs_item *p; |
| 2845 | |
| 2846 | for (p = debugfs_entries; p->name; ++p) |
| 2847 | debugfs_remove(p->dentry); |
Hollis Blanchard | 76f7c87 | 2008-04-15 16:05:42 -0500 | [diff] [blame] | 2848 | debugfs_remove(kvm_debugfs_dir); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2849 | } |
| 2850 | |
Rafael J. Wysocki | fb3600c | 2011-03-23 22:16:23 +0100 | [diff] [blame] | 2851 | static int kvm_suspend(void) |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 2852 | { |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2853 | if (kvm_usage_count) |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2854 | hardware_disable_nolock(NULL); |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 2855 | return 0; |
| 2856 | } |
| 2857 | |
Rafael J. Wysocki | fb3600c | 2011-03-23 22:16:23 +0100 | [diff] [blame] | 2858 | static void kvm_resume(void) |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 2859 | { |
Zachary Amsden | ca84d1a | 2010-08-19 22:07:28 -1000 | [diff] [blame] | 2860 | if (kvm_usage_count) { |
Jan Kiszka | e935b83 | 2011-02-08 12:55:33 +0100 | [diff] [blame] | 2861 | WARN_ON(raw_spin_is_locked(&kvm_lock)); |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2862 | hardware_enable_nolock(NULL); |
Zachary Amsden | ca84d1a | 2010-08-19 22:07:28 -1000 | [diff] [blame] | 2863 | } |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 2864 | } |
| 2865 | |
Rafael J. Wysocki | fb3600c | 2011-03-23 22:16:23 +0100 | [diff] [blame] | 2866 | static struct syscore_ops kvm_syscore_ops = { |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 2867 | .suspend = kvm_suspend, |
| 2868 | .resume = kvm_resume, |
| 2869 | }; |
| 2870 | |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 2871 | static inline |
| 2872 | struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn) |
| 2873 | { |
| 2874 | return container_of(pn, struct kvm_vcpu, preempt_notifier); |
| 2875 | } |
| 2876 | |
| 2877 | static void kvm_sched_in(struct preempt_notifier *pn, int cpu) |
| 2878 | { |
| 2879 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); |
Raghavendra K T | 3a08a8f | 2013-03-04 23:32:07 +0530 | [diff] [blame] | 2880 | if (vcpu->preempted) |
| 2881 | vcpu->preempted = false; |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 2882 | |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 2883 | kvm_arch_vcpu_load(vcpu, cpu); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 2884 | } |
| 2885 | |
| 2886 | static void kvm_sched_out(struct preempt_notifier *pn, |
| 2887 | struct task_struct *next) |
| 2888 | { |
| 2889 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); |
| 2890 | |
Raghavendra K T | 3a08a8f | 2013-03-04 23:32:07 +0530 | [diff] [blame] | 2891 | if (current->state == TASK_RUNNING) |
| 2892 | vcpu->preempted = true; |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 2893 | kvm_arch_vcpu_put(vcpu); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 2894 | } |
| 2895 | |
Avi Kivity | 0ee75be | 2010-04-28 15:39:01 +0300 | [diff] [blame] | 2896 | int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align, |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 2897 | struct module *module) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2898 | { |
| 2899 | int r; |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 2900 | int cpu; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2901 | |
Cornelia Huck | a0f155e | 2013-02-28 12:33:18 +0100 | [diff] [blame] | 2902 | r = kvm_irqfd_init(); |
| 2903 | if (r) |
| 2904 | goto out_irqfd; |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 2905 | r = kvm_arch_init(opaque); |
| 2906 | if (r) |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2907 | goto out_fail; |
Zhang Xiantao | cb498ea | 2007-11-14 20:39:31 +0800 | [diff] [blame] | 2908 | |
Avi Kivity | 8437a61 | 2009-06-06 14:52:35 -0700 | [diff] [blame] | 2909 | if (!zalloc_cpumask_var(&cpus_hardware_enabled, GFP_KERNEL)) { |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 2910 | r = -ENOMEM; |
| 2911 | goto out_free_0; |
| 2912 | } |
| 2913 | |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 2914 | r = kvm_arch_hardware_setup(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2915 | if (r < 0) |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 2916 | goto out_free_0a; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2917 | |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 2918 | for_each_online_cpu(cpu) { |
| 2919 | smp_call_function_single(cpu, |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 2920 | kvm_arch_check_processor_compat, |
Jens Axboe | 8691e5a | 2008-06-06 11:18:06 +0200 | [diff] [blame] | 2921 | &r, 1); |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 2922 | if (r < 0) |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2923 | goto out_free_1; |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 2924 | } |
| 2925 | |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 2926 | r = register_cpu_notifier(&kvm_cpu_notifier); |
| 2927 | if (r) |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2928 | goto out_free_2; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2929 | register_reboot_notifier(&kvm_reboot_notifier); |
| 2930 | |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 2931 | /* A kmem cache lets us meet the alignment requirements of fx_save. */ |
Avi Kivity | 0ee75be | 2010-04-28 15:39:01 +0300 | [diff] [blame] | 2932 | if (!vcpu_align) |
| 2933 | vcpu_align = __alignof__(struct kvm_vcpu); |
| 2934 | kvm_vcpu_cache = kmem_cache_create("kvm_vcpu", vcpu_size, vcpu_align, |
Joe Perches | 56919c5 | 2007-11-12 20:06:51 -0800 | [diff] [blame] | 2935 | 0, NULL); |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 2936 | if (!kvm_vcpu_cache) { |
| 2937 | r = -ENOMEM; |
Rafael J. Wysocki | fb3600c | 2011-03-23 22:16:23 +0100 | [diff] [blame] | 2938 | goto out_free_3; |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 2939 | } |
| 2940 | |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 2941 | r = kvm_async_pf_init(); |
| 2942 | if (r) |
| 2943 | goto out_free; |
| 2944 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2945 | kvm_chardev_ops.owner = module; |
Christian Borntraeger | 3d3aab1 | 2008-12-02 11:17:32 +0100 | [diff] [blame] | 2946 | kvm_vm_fops.owner = module; |
| 2947 | kvm_vcpu_fops.owner = module; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2948 | |
| 2949 | r = misc_register(&kvm_dev); |
| 2950 | if (r) { |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 2951 | printk(KERN_ERR "kvm: misc device register failed\n"); |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 2952 | goto out_unreg; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2953 | } |
| 2954 | |
Rafael J. Wysocki | fb3600c | 2011-03-23 22:16:23 +0100 | [diff] [blame] | 2955 | register_syscore_ops(&kvm_syscore_ops); |
| 2956 | |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 2957 | kvm_preempt_ops.sched_in = kvm_sched_in; |
| 2958 | kvm_preempt_ops.sched_out = kvm_sched_out; |
| 2959 | |
Hamo | 4f69b68 | 2011-12-15 14:23:16 +0800 | [diff] [blame] | 2960 | r = kvm_init_debug(); |
| 2961 | if (r) { |
| 2962 | printk(KERN_ERR "kvm: create debugfs files failed\n"); |
| 2963 | goto out_undebugfs; |
| 2964 | } |
Darrick J. Wong | 0ea4ed8 | 2009-10-14 16:21:00 -0700 | [diff] [blame] | 2965 | |
Avi Kivity | c7addb9 | 2007-09-16 18:58:32 +0200 | [diff] [blame] | 2966 | return 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2967 | |
Hamo | 4f69b68 | 2011-12-15 14:23:16 +0800 | [diff] [blame] | 2968 | out_undebugfs: |
| 2969 | unregister_syscore_ops(&kvm_syscore_ops); |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 2970 | out_unreg: |
| 2971 | kvm_async_pf_deinit(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2972 | out_free: |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 2973 | kmem_cache_destroy(kvm_vcpu_cache); |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2974 | out_free_3: |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2975 | unregister_reboot_notifier(&kvm_reboot_notifier); |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 2976 | unregister_cpu_notifier(&kvm_cpu_notifier); |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2977 | out_free_2: |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2978 | out_free_1: |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 2979 | kvm_arch_hardware_unsetup(); |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 2980 | out_free_0a: |
| 2981 | free_cpumask_var(cpus_hardware_enabled); |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2982 | out_free_0: |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 2983 | kvm_arch_exit(); |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 2984 | out_fail: |
Cornelia Huck | a0f155e | 2013-02-28 12:33:18 +0100 | [diff] [blame] | 2985 | kvm_irqfd_exit(); |
| 2986 | out_irqfd: |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2987 | return r; |
| 2988 | } |
Zhang Xiantao | cb498ea | 2007-11-14 20:39:31 +0800 | [diff] [blame] | 2989 | EXPORT_SYMBOL_GPL(kvm_init); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2990 | |
Zhang Xiantao | cb498ea | 2007-11-14 20:39:31 +0800 | [diff] [blame] | 2991 | void kvm_exit(void) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2992 | { |
Darrick J. Wong | 0ea4ed8 | 2009-10-14 16:21:00 -0700 | [diff] [blame] | 2993 | kvm_exit_debug(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2994 | misc_deregister(&kvm_dev); |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 2995 | kmem_cache_destroy(kvm_vcpu_cache); |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 2996 | kvm_async_pf_deinit(); |
Rafael J. Wysocki | fb3600c | 2011-03-23 22:16:23 +0100 | [diff] [blame] | 2997 | unregister_syscore_ops(&kvm_syscore_ops); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2998 | unregister_reboot_notifier(&kvm_reboot_notifier); |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 2999 | unregister_cpu_notifier(&kvm_cpu_notifier); |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 3000 | on_each_cpu(hardware_disable_nolock, NULL, 1); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 3001 | kvm_arch_hardware_unsetup(); |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 3002 | kvm_arch_exit(); |
Cornelia Huck | a0f155e | 2013-02-28 12:33:18 +0100 | [diff] [blame] | 3003 | kvm_irqfd_exit(); |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 3004 | free_cpumask_var(cpus_hardware_enabled); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3005 | } |
Zhang Xiantao | cb498ea | 2007-11-14 20:39:31 +0800 | [diff] [blame] | 3006 | EXPORT_SYMBOL_GPL(kvm_exit); |