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 | |
Andre Przywara | af669ac | 2015-03-26 14:39:29 +0000 | [diff] [blame] | 19 | #include <kvm/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> |
David Matlack | 2ea75be | 2014-09-19 16:03:25 -0700 | [diff] [blame] | 55 | #include <asm/ioctl.h> |
Avi Kivity | e495606 | 2007-06-28 14:15:57 -0400 | [diff] [blame] | 56 | #include <asm/uaccess.h> |
Izik Eidus | 3e021bf | 2007-11-19 11:16:57 +0200 | [diff] [blame] | 57 | #include <asm/pgtable.h> |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 58 | |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 59 | #include "coalesced_mmio.h" |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 60 | #include "async_pf.h" |
Paolo Bonzini | 3c3c29f | 2014-09-24 13:02:46 +0200 | [diff] [blame] | 61 | #include "vfio.h" |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 62 | |
Marcelo Tosatti | 229456f | 2009-06-17 09:22:14 -0300 | [diff] [blame] | 63 | #define CREATE_TRACE_POINTS |
| 64 | #include <trace/events/kvm.h> |
| 65 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 66 | MODULE_AUTHOR("Qumranet"); |
| 67 | MODULE_LICENSE("GPL"); |
| 68 | |
Christian Borntraeger | 0fa9778 | 2015-02-27 16:50:10 +0100 | [diff] [blame] | 69 | static unsigned int halt_poll_ns; |
Paolo Bonzini | f781951 | 2015-02-04 18:20:58 +0100 | [diff] [blame] | 70 | module_param(halt_poll_ns, uint, S_IRUGO | S_IWUSR); |
| 71 | |
Marcelo Tosatti | fa40a82 | 2009-06-04 15:08:24 -0300 | [diff] [blame] | 72 | /* |
| 73 | * Ordering of locks: |
| 74 | * |
Xiubo Li | b7d409d | 2015-02-26 14:58:24 +0800 | [diff] [blame] | 75 | * kvm->lock --> kvm->slots_lock --> kvm->irq_lock |
Marcelo Tosatti | fa40a82 | 2009-06-04 15:08:24 -0300 | [diff] [blame] | 76 | */ |
| 77 | |
Paolo Bonzini | 2f303b7 | 2013-09-25 13:53:07 +0200 | [diff] [blame] | 78 | DEFINE_SPINLOCK(kvm_lock); |
Paolo Bonzini | 4a937f9 | 2013-09-10 12:58:35 +0200 | [diff] [blame] | 79 | static DEFINE_RAW_SPINLOCK(kvm_count_lock); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 80 | LIST_HEAD(vm_list); |
Avi Kivity | 133de90 | 2007-02-12 00:54:44 -0800 | [diff] [blame] | 81 | |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 82 | static cpumask_var_t cpus_hardware_enabled; |
Xiubo Li | f4fee93 | 2015-02-26 14:58:21 +0800 | [diff] [blame] | 83 | static int kvm_usage_count; |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 84 | static atomic_t hardware_enable_failed; |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 85 | |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 86 | struct kmem_cache *kvm_vcpu_cache; |
| 87 | EXPORT_SYMBOL_GPL(kvm_vcpu_cache); |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 88 | |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 89 | static __read_mostly struct preempt_ops kvm_preempt_ops; |
| 90 | |
Hollis Blanchard | 76f7c87 | 2008-04-15 16:05:42 -0500 | [diff] [blame] | 91 | struct dentry *kvm_debugfs_dir; |
Paul Mackerras | e23a808 | 2015-03-28 14:21:01 +1100 | [diff] [blame] | 92 | EXPORT_SYMBOL_GPL(kvm_debugfs_dir); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 93 | |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 94 | static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl, |
| 95 | unsigned long arg); |
Christian Borntraeger | de8e5d7 | 2015-02-03 09:35:15 +0100 | [diff] [blame] | 96 | #ifdef CONFIG_KVM_COMPAT |
Alexander Graf | 1dda606 | 2011-06-08 02:45:37 +0200 | [diff] [blame] | 97 | static long kvm_vcpu_compat_ioctl(struct file *file, unsigned int ioctl, |
| 98 | unsigned long arg); |
| 99 | #endif |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 100 | static int hardware_enable_all(void); |
| 101 | static void hardware_disable_all(void); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 102 | |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 103 | static void kvm_io_bus_destroy(struct kvm_io_bus *bus); |
Stephen Hemminger | 7940876 | 2013-12-29 12:12:29 -0800 | [diff] [blame] | 104 | |
| 105 | static void kvm_release_pfn_dirty(pfn_t pfn); |
| 106 | static void mark_page_dirty_in_slot(struct kvm *kvm, |
| 107 | struct kvm_memory_slot *memslot, gfn_t gfn); |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 108 | |
Andi Kleen | 5248013 | 2014-02-08 08:51:57 +0100 | [diff] [blame] | 109 | __visible bool kvm_rebooting; |
Avi Kivity | b7c4145 | 2010-12-02 17:52:50 +0200 | [diff] [blame] | 110 | EXPORT_SYMBOL_GPL(kvm_rebooting); |
Avi Kivity | 4ecac3f | 2008-05-13 13:23:38 +0300 | [diff] [blame] | 111 | |
Marcelo Tosatti | 54dee99 | 2009-06-11 12:07:44 -0300 | [diff] [blame] | 112 | static bool largepages_enabled = true; |
| 113 | |
Ard Biesheuvel | bf4bea8 | 2014-11-10 08:33:56 +0000 | [diff] [blame] | 114 | bool kvm_is_reserved_pfn(pfn_t pfn) |
Ben-Ami Yassour | cbff90a | 2008-07-28 19:26:24 +0300 | [diff] [blame] | 115 | { |
Andrea Arcangeli | 11feeb4 | 2013-07-25 03:04:38 +0200 | [diff] [blame] | 116 | if (pfn_valid(pfn)) |
Ard Biesheuvel | bf4bea8 | 2014-11-10 08:33:56 +0000 | [diff] [blame] | 117 | return PageReserved(pfn_to_page(pfn)); |
Ben-Ami Yassour | cbff90a | 2008-07-28 19:26:24 +0300 | [diff] [blame] | 118 | |
| 119 | return true; |
| 120 | } |
| 121 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 122 | /* |
| 123 | * Switches to specified vcpu, until a matching vcpu_put() |
| 124 | */ |
Michael S. Tsirkin | 9fc7744 | 2012-09-16 11:50:30 +0300 | [diff] [blame] | 125 | int vcpu_load(struct kvm_vcpu *vcpu) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 126 | { |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 127 | int cpu; |
| 128 | |
Michael S. Tsirkin | 9fc7744 | 2012-09-16 11:50:30 +0300 | [diff] [blame] | 129 | if (mutex_lock_killable(&vcpu->mutex)) |
| 130 | return -EINTR; |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 131 | cpu = get_cpu(); |
| 132 | preempt_notifier_register(&vcpu->preempt_notifier); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 133 | kvm_arch_vcpu_load(vcpu, cpu); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 134 | put_cpu(); |
Michael S. Tsirkin | 9fc7744 | 2012-09-16 11:50:30 +0300 | [diff] [blame] | 135 | return 0; |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 136 | } |
| 137 | |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 138 | void vcpu_put(struct kvm_vcpu *vcpu) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 139 | { |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 140 | preempt_disable(); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 141 | kvm_arch_vcpu_put(vcpu); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 142 | preempt_notifier_unregister(&vcpu->preempt_notifier); |
| 143 | preempt_enable(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 144 | mutex_unlock(&vcpu->mutex); |
| 145 | } |
| 146 | |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 147 | static void ack_flush(void *_completed) |
| 148 | { |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 149 | } |
| 150 | |
Tang Chen | 445b823 | 2014-09-24 15:57:55 +0800 | [diff] [blame] | 151 | bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req) |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 152 | { |
Avi Kivity | 597a5f5 | 2008-07-20 14:24:22 +0300 | [diff] [blame] | 153 | int i, cpu, me; |
Rusty Russell | 6ef7a1b | 2008-12-08 20:28:04 +1030 | [diff] [blame] | 154 | cpumask_var_t cpus; |
| 155 | bool called = true; |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 156 | struct kvm_vcpu *vcpu; |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 157 | |
Li Zefan | 79f5599 | 2009-06-15 14:58:26 +0800 | [diff] [blame] | 158 | zalloc_cpumask_var(&cpus, GFP_ATOMIC); |
Rusty Russell | 6ef7a1b | 2008-12-08 20:28:04 +1030 | [diff] [blame] | 159 | |
Xiao Guangrong | 3cba413 | 2011-01-12 15:41:22 +0800 | [diff] [blame] | 160 | me = get_cpu(); |
Gleb Natapov | 988a2ca | 2009-06-09 15:56:29 +0300 | [diff] [blame] | 161 | kvm_for_each_vcpu(i, vcpu, kvm) { |
Xiao Guangrong | 3cba413 | 2011-01-12 15:41:22 +0800 | [diff] [blame] | 162 | kvm_make_request(req, vcpu); |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 163 | cpu = vcpu->cpu; |
Xiao Guangrong | 6b7e2d0 | 2011-01-12 15:40:31 +0800 | [diff] [blame] | 164 | |
| 165 | /* Set ->requests bit before we read ->mode */ |
| 166 | smp_mb(); |
| 167 | |
| 168 | if (cpus != NULL && cpu != -1 && cpu != me && |
| 169 | kvm_vcpu_exiting_guest_mode(vcpu) != OUTSIDE_GUEST_MODE) |
Rusty Russell | 6ef7a1b | 2008-12-08 20:28:04 +1030 | [diff] [blame] | 170 | cpumask_set_cpu(cpu, cpus); |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 171 | } |
Rusty Russell | 6ef7a1b | 2008-12-08 20:28:04 +1030 | [diff] [blame] | 172 | if (unlikely(cpus == NULL)) |
| 173 | smp_call_function_many(cpu_online_mask, ack_flush, NULL, 1); |
| 174 | else if (!cpumask_empty(cpus)) |
| 175 | smp_call_function_many(cpus, ack_flush, NULL, 1); |
| 176 | else |
| 177 | called = false; |
Xiao Guangrong | 3cba413 | 2011-01-12 15:41:22 +0800 | [diff] [blame] | 178 | put_cpu(); |
Rusty Russell | 6ef7a1b | 2008-12-08 20:28:04 +1030 | [diff] [blame] | 179 | free_cpumask_var(cpus); |
Rusty Russell | 4984689 | 2008-12-08 20:26:24 +1030 | [diff] [blame] | 180 | return called; |
| 181 | } |
| 182 | |
Mario Smarduch | a6d5101 | 2015-01-15 15:58:52 -0800 | [diff] [blame] | 183 | #ifndef CONFIG_HAVE_KVM_ARCH_TLB_FLUSH_ALL |
Rusty Russell | 4984689 | 2008-12-08 20:26:24 +1030 | [diff] [blame] | 184 | void kvm_flush_remote_tlbs(struct kvm *kvm) |
| 185 | { |
Xiao Guangrong | a086f6a | 2014-04-17 17:06:12 +0800 | [diff] [blame] | 186 | long dirty_count = kvm->tlbs_dirty; |
| 187 | |
| 188 | smp_mb(); |
Tang Chen | 445b823 | 2014-09-24 15:57:55 +0800 | [diff] [blame] | 189 | if (kvm_make_all_cpus_request(kvm, KVM_REQ_TLB_FLUSH)) |
Rusty Russell | 4984689 | 2008-12-08 20:26:24 +1030 | [diff] [blame] | 190 | ++kvm->stat.remote_tlb_flush; |
Xiao Guangrong | a086f6a | 2014-04-17 17:06:12 +0800 | [diff] [blame] | 191 | cmpxchg(&kvm->tlbs_dirty, dirty_count, 0); |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 192 | } |
Aneesh Kumar K.V | 2ba9f0d | 2013-10-07 22:17:59 +0530 | [diff] [blame] | 193 | EXPORT_SYMBOL_GPL(kvm_flush_remote_tlbs); |
Mario Smarduch | a6d5101 | 2015-01-15 15:58:52 -0800 | [diff] [blame] | 194 | #endif |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 195 | |
Marcelo Tosatti | 2e53d63 | 2008-02-20 14:47:24 -0500 | [diff] [blame] | 196 | void kvm_reload_remote_mmus(struct kvm *kvm) |
| 197 | { |
Tang Chen | 445b823 | 2014-09-24 15:57:55 +0800 | [diff] [blame] | 198 | kvm_make_all_cpus_request(kvm, KVM_REQ_MMU_RELOAD); |
Marcelo Tosatti | 2e53d63 | 2008-02-20 14:47:24 -0500 | [diff] [blame] | 199 | } |
| 200 | |
Marcelo Tosatti | d828199 | 2012-11-27 23:29:01 -0200 | [diff] [blame] | 201 | void kvm_make_mclock_inprogress_request(struct kvm *kvm) |
| 202 | { |
Tang Chen | 445b823 | 2014-09-24 15:57:55 +0800 | [diff] [blame] | 203 | kvm_make_all_cpus_request(kvm, KVM_REQ_MCLOCK_INPROGRESS); |
Marcelo Tosatti | d828199 | 2012-11-27 23:29:01 -0200 | [diff] [blame] | 204 | } |
| 205 | |
Yang Zhang | 3d81bc7 | 2013-04-11 19:25:13 +0800 | [diff] [blame] | 206 | void kvm_make_scan_ioapic_request(struct kvm *kvm) |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 207 | { |
Tang Chen | 445b823 | 2014-09-24 15:57:55 +0800 | [diff] [blame] | 208 | kvm_make_all_cpus_request(kvm, KVM_REQ_SCAN_IOAPIC); |
Yang Zhang | c7c9c56 | 2013-01-25 10:18:51 +0800 | [diff] [blame] | 209 | } |
| 210 | |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 211 | int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id) |
| 212 | { |
| 213 | struct page *page; |
| 214 | int r; |
| 215 | |
| 216 | mutex_init(&vcpu->mutex); |
| 217 | vcpu->cpu = -1; |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 218 | vcpu->kvm = kvm; |
| 219 | vcpu->vcpu_id = id; |
Rik van Riel | 34bb10b | 2011-02-01 09:52:41 -0500 | [diff] [blame] | 220 | vcpu->pid = NULL; |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 221 | init_waitqueue_head(&vcpu->wq); |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 222 | kvm_async_pf_vcpu_init(vcpu); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 223 | |
| 224 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); |
| 225 | if (!page) { |
| 226 | r = -ENOMEM; |
| 227 | goto fail; |
| 228 | } |
| 229 | vcpu->run = page_address(page); |
| 230 | |
Raghavendra K T | 4c08849 | 2012-07-18 19:07:46 +0530 | [diff] [blame] | 231 | kvm_vcpu_set_in_spin_loop(vcpu, false); |
| 232 | kvm_vcpu_set_dy_eligible(vcpu, false); |
Raghavendra K T | 3a08a8f | 2013-03-04 23:32:07 +0530 | [diff] [blame] | 233 | vcpu->preempted = false; |
Raghavendra K T | 4c08849 | 2012-07-18 19:07:46 +0530 | [diff] [blame] | 234 | |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 235 | r = kvm_arch_vcpu_init(vcpu); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 236 | if (r < 0) |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 237 | goto fail_free_run; |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 238 | return 0; |
| 239 | |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 240 | fail_free_run: |
| 241 | free_page((unsigned long)vcpu->run); |
| 242 | fail: |
Rusty Russell | 76fafa5 | 2007-10-08 10:50:48 +1000 | [diff] [blame] | 243 | return r; |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 244 | } |
| 245 | EXPORT_SYMBOL_GPL(kvm_vcpu_init); |
| 246 | |
| 247 | void kvm_vcpu_uninit(struct kvm_vcpu *vcpu) |
| 248 | { |
Rik van Riel | 34bb10b | 2011-02-01 09:52:41 -0500 | [diff] [blame] | 249 | put_pid(vcpu->pid); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 250 | kvm_arch_vcpu_uninit(vcpu); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 251 | free_page((unsigned long)vcpu->run); |
| 252 | } |
| 253 | EXPORT_SYMBOL_GPL(kvm_vcpu_uninit); |
| 254 | |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 255 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) |
| 256 | static inline struct kvm *mmu_notifier_to_kvm(struct mmu_notifier *mn) |
| 257 | { |
| 258 | return container_of(mn, struct kvm, mmu_notifier); |
| 259 | } |
| 260 | |
| 261 | static void kvm_mmu_notifier_invalidate_page(struct mmu_notifier *mn, |
| 262 | struct mm_struct *mm, |
| 263 | unsigned long address) |
| 264 | { |
| 265 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 266 | int need_tlb_flush, idx; |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 267 | |
| 268 | /* |
| 269 | * When ->invalidate_page runs, the linux pte has been zapped |
| 270 | * already but the page is still allocated until |
| 271 | * ->invalidate_page returns. So if we increase the sequence |
| 272 | * here the kvm page fault will notice if the spte can't be |
| 273 | * established because the page is going to be freed. If |
| 274 | * instead the kvm page fault establishes the spte before |
| 275 | * ->invalidate_page runs, kvm_unmap_hva will release it |
| 276 | * before returning. |
| 277 | * |
| 278 | * The sequence increase only need to be seen at spin_unlock |
| 279 | * time, and not at spin_lock time. |
| 280 | * |
| 281 | * Increasing the sequence after the spin_unlock would be |
| 282 | * unsafe because the kvm page fault could then establish the |
| 283 | * pte after kvm_unmap_hva returned, without noticing the page |
| 284 | * is going to be freed. |
| 285 | */ |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 286 | idx = srcu_read_lock(&kvm->srcu); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 287 | spin_lock(&kvm->mmu_lock); |
Takuya Yoshikawa | 565f3be | 2012-02-10 15:28:31 +0900 | [diff] [blame] | 288 | |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 289 | kvm->mmu_notifier_seq++; |
Xiao Guangrong | a4ee1ca | 2010-11-23 11:13:00 +0800 | [diff] [blame] | 290 | need_tlb_flush = kvm_unmap_hva(kvm, address) | kvm->tlbs_dirty; |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 291 | /* we've to flush the tlb before the pages can be freed */ |
| 292 | if (need_tlb_flush) |
| 293 | kvm_flush_remote_tlbs(kvm); |
| 294 | |
Takuya Yoshikawa | 565f3be | 2012-02-10 15:28:31 +0900 | [diff] [blame] | 295 | spin_unlock(&kvm->mmu_lock); |
Tang Chen | fe71557 | 2014-09-24 15:57:57 +0800 | [diff] [blame] | 296 | |
| 297 | kvm_arch_mmu_notifier_invalidate_page(kvm, address); |
| 298 | |
Takuya Yoshikawa | 565f3be | 2012-02-10 15:28:31 +0900 | [diff] [blame] | 299 | srcu_read_unlock(&kvm->srcu, idx); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 300 | } |
| 301 | |
Izik Eidus | 3da0dd4 | 2009-09-23 21:47:18 +0300 | [diff] [blame] | 302 | static void kvm_mmu_notifier_change_pte(struct mmu_notifier *mn, |
| 303 | struct mm_struct *mm, |
| 304 | unsigned long address, |
| 305 | pte_t pte) |
| 306 | { |
| 307 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 308 | int idx; |
Izik Eidus | 3da0dd4 | 2009-09-23 21:47:18 +0300 | [diff] [blame] | 309 | |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 310 | idx = srcu_read_lock(&kvm->srcu); |
Izik Eidus | 3da0dd4 | 2009-09-23 21:47:18 +0300 | [diff] [blame] | 311 | spin_lock(&kvm->mmu_lock); |
| 312 | kvm->mmu_notifier_seq++; |
| 313 | kvm_set_spte_hva(kvm, address, pte); |
| 314 | spin_unlock(&kvm->mmu_lock); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 315 | srcu_read_unlock(&kvm->srcu, idx); |
Izik Eidus | 3da0dd4 | 2009-09-23 21:47:18 +0300 | [diff] [blame] | 316 | } |
| 317 | |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 318 | static void kvm_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn, |
| 319 | struct mm_struct *mm, |
| 320 | unsigned long start, |
| 321 | unsigned long end) |
| 322 | { |
| 323 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 324 | int need_tlb_flush = 0, idx; |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 325 | |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 326 | idx = srcu_read_lock(&kvm->srcu); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 327 | spin_lock(&kvm->mmu_lock); |
| 328 | /* |
| 329 | * The count increase must become visible at unlock time as no |
| 330 | * spte can be established without taking the mmu_lock and |
| 331 | * count is also read inside the mmu_lock critical section. |
| 332 | */ |
| 333 | kvm->mmu_notifier_count++; |
Takuya Yoshikawa | b3ae209 | 2012-07-02 17:56:33 +0900 | [diff] [blame] | 334 | need_tlb_flush = kvm_unmap_hva_range(kvm, start, end); |
Xiao Guangrong | a4ee1ca | 2010-11-23 11:13:00 +0800 | [diff] [blame] | 335 | need_tlb_flush |= kvm->tlbs_dirty; |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 336 | /* we've to flush the tlb before the pages can be freed */ |
| 337 | if (need_tlb_flush) |
| 338 | kvm_flush_remote_tlbs(kvm); |
Takuya Yoshikawa | 565f3be | 2012-02-10 15:28:31 +0900 | [diff] [blame] | 339 | |
| 340 | spin_unlock(&kvm->mmu_lock); |
| 341 | srcu_read_unlock(&kvm->srcu, idx); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 342 | } |
| 343 | |
| 344 | static void kvm_mmu_notifier_invalidate_range_end(struct mmu_notifier *mn, |
| 345 | struct mm_struct *mm, |
| 346 | unsigned long start, |
| 347 | unsigned long end) |
| 348 | { |
| 349 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
| 350 | |
| 351 | spin_lock(&kvm->mmu_lock); |
| 352 | /* |
| 353 | * This sequence increase will notify the kvm page fault that |
| 354 | * the page that is going to be mapped in the spte could have |
| 355 | * been freed. |
| 356 | */ |
| 357 | kvm->mmu_notifier_seq++; |
Paul Mackerras | a355aa5 | 2011-12-12 12:37:21 +0000 | [diff] [blame] | 358 | smp_wmb(); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 359 | /* |
| 360 | * The above sequence increase must be visible before the |
Paul Mackerras | a355aa5 | 2011-12-12 12:37:21 +0000 | [diff] [blame] | 361 | * below count decrease, which is ensured by the smp_wmb above |
| 362 | * in conjunction with the smp_rmb in mmu_notifier_retry(). |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 363 | */ |
| 364 | kvm->mmu_notifier_count--; |
| 365 | spin_unlock(&kvm->mmu_lock); |
| 366 | |
| 367 | BUG_ON(kvm->mmu_notifier_count < 0); |
| 368 | } |
| 369 | |
| 370 | static int kvm_mmu_notifier_clear_flush_young(struct mmu_notifier *mn, |
| 371 | struct mm_struct *mm, |
Andres Lagar-Cavilla | 5712846 | 2014-09-22 14:54:42 -0700 | [diff] [blame] | 372 | unsigned long start, |
| 373 | unsigned long end) |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 374 | { |
| 375 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 376 | int young, idx; |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 377 | |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 378 | idx = srcu_read_lock(&kvm->srcu); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 379 | spin_lock(&kvm->mmu_lock); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 380 | |
Andres Lagar-Cavilla | 5712846 | 2014-09-22 14:54:42 -0700 | [diff] [blame] | 381 | young = kvm_age_hva(kvm, start, end); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 382 | if (young) |
| 383 | kvm_flush_remote_tlbs(kvm); |
| 384 | |
Takuya Yoshikawa | 565f3be | 2012-02-10 15:28:31 +0900 | [diff] [blame] | 385 | spin_unlock(&kvm->mmu_lock); |
| 386 | srcu_read_unlock(&kvm->srcu, idx); |
| 387 | |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 388 | return young; |
| 389 | } |
| 390 | |
Andrea Arcangeli | 8ee5382 | 2011-01-13 15:47:10 -0800 | [diff] [blame] | 391 | static int kvm_mmu_notifier_test_young(struct mmu_notifier *mn, |
| 392 | struct mm_struct *mm, |
| 393 | unsigned long address) |
| 394 | { |
| 395 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
| 396 | int young, idx; |
| 397 | |
| 398 | idx = srcu_read_lock(&kvm->srcu); |
| 399 | spin_lock(&kvm->mmu_lock); |
| 400 | young = kvm_test_age_hva(kvm, address); |
| 401 | spin_unlock(&kvm->mmu_lock); |
| 402 | srcu_read_unlock(&kvm->srcu, idx); |
| 403 | |
| 404 | return young; |
| 405 | } |
| 406 | |
Marcelo Tosatti | 85db06e | 2008-12-10 21:23:26 +0100 | [diff] [blame] | 407 | static void kvm_mmu_notifier_release(struct mmu_notifier *mn, |
| 408 | struct mm_struct *mm) |
| 409 | { |
| 410 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
Lai Jiangshan | eda2bed | 2010-04-20 14:29:29 +0800 | [diff] [blame] | 411 | int idx; |
| 412 | |
| 413 | idx = srcu_read_lock(&kvm->srcu); |
Marcelo Tosatti | 2df72e9 | 2012-08-24 15:54:57 -0300 | [diff] [blame] | 414 | kvm_arch_flush_shadow_all(kvm); |
Lai Jiangshan | eda2bed | 2010-04-20 14:29:29 +0800 | [diff] [blame] | 415 | srcu_read_unlock(&kvm->srcu, idx); |
Marcelo Tosatti | 85db06e | 2008-12-10 21:23:26 +0100 | [diff] [blame] | 416 | } |
| 417 | |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 418 | static const struct mmu_notifier_ops kvm_mmu_notifier_ops = { |
| 419 | .invalidate_page = kvm_mmu_notifier_invalidate_page, |
| 420 | .invalidate_range_start = kvm_mmu_notifier_invalidate_range_start, |
| 421 | .invalidate_range_end = kvm_mmu_notifier_invalidate_range_end, |
| 422 | .clear_flush_young = kvm_mmu_notifier_clear_flush_young, |
Andrea Arcangeli | 8ee5382 | 2011-01-13 15:47:10 -0800 | [diff] [blame] | 423 | .test_young = kvm_mmu_notifier_test_young, |
Izik Eidus | 3da0dd4 | 2009-09-23 21:47:18 +0300 | [diff] [blame] | 424 | .change_pte = kvm_mmu_notifier_change_pte, |
Marcelo Tosatti | 85db06e | 2008-12-10 21:23:26 +0100 | [diff] [blame] | 425 | .release = kvm_mmu_notifier_release, |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 426 | }; |
Avi Kivity | 4c07b0a | 2009-12-20 14:54:04 +0200 | [diff] [blame] | 427 | |
| 428 | static int kvm_init_mmu_notifier(struct kvm *kvm) |
| 429 | { |
| 430 | kvm->mmu_notifier.ops = &kvm_mmu_notifier_ops; |
| 431 | return mmu_notifier_register(&kvm->mmu_notifier, current->mm); |
| 432 | } |
| 433 | |
| 434 | #else /* !(CONFIG_MMU_NOTIFIER && KVM_ARCH_WANT_MMU_NOTIFIER) */ |
| 435 | |
| 436 | static int kvm_init_mmu_notifier(struct kvm *kvm) |
| 437 | { |
| 438 | return 0; |
| 439 | } |
| 440 | |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 441 | #endif /* CONFIG_MMU_NOTIFIER && KVM_ARCH_WANT_MMU_NOTIFIER */ |
| 442 | |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 443 | static void kvm_init_memslots_id(struct kvm *kvm) |
| 444 | { |
| 445 | int i; |
| 446 | struct kvm_memslots *slots = kvm->memslots; |
| 447 | |
| 448 | for (i = 0; i < KVM_MEM_SLOTS_NUM; i++) |
Xiao Guangrong | f85e2cb | 2011-11-24 17:41:54 +0800 | [diff] [blame] | 449 | slots->id_to_index[i] = slots->memslots[i].id = i; |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 450 | } |
| 451 | |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 452 | static struct kvm *kvm_create_vm(unsigned long type) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 453 | { |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 454 | int r, i; |
| 455 | struct kvm *kvm = kvm_arch_alloc_vm(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 456 | |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 457 | if (!kvm) |
| 458 | return ERR_PTR(-ENOMEM); |
| 459 | |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 460 | r = kvm_arch_init_vm(kvm, type); |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 461 | if (r) |
Christian Borntraeger | 719d93c | 2014-01-16 13:44:20 +0100 | [diff] [blame] | 462 | goto out_err_no_disable; |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 463 | |
| 464 | r = hardware_enable_all(); |
| 465 | if (r) |
Christian Borntraeger | 719d93c | 2014-01-16 13:44:20 +0100 | [diff] [blame] | 466 | goto out_err_no_disable; |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 467 | |
Paolo Bonzini | c77dcac | 2014-08-06 14:24:45 +0200 | [diff] [blame] | 468 | #ifdef CONFIG_HAVE_KVM_IRQFD |
Gleb Natapov | 136bdfe | 2009-08-24 11:54:23 +0300 | [diff] [blame] | 469 | INIT_HLIST_HEAD(&kvm->irq_ack_notifier_list); |
Avi Kivity | 75858a8 | 2009-01-04 17:10:50 +0200 | [diff] [blame] | 470 | #endif |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 471 | |
Alex Williamson | 1e702d9 | 2012-12-10 10:33:32 -0700 | [diff] [blame] | 472 | BUILD_BUG_ON(KVM_MEM_SLOTS_NUM > SHRT_MAX); |
| 473 | |
Marcelo Tosatti | 46a26bf | 2009-12-23 14:35:16 -0200 | [diff] [blame] | 474 | r = -ENOMEM; |
Igor Mammedov | 7449613 | 2015-03-20 12:21:37 +0000 | [diff] [blame] | 475 | kvm->memslots = kvm_kvzalloc(sizeof(struct kvm_memslots)); |
Marcelo Tosatti | 46a26bf | 2009-12-23 14:35:16 -0200 | [diff] [blame] | 476 | if (!kvm->memslots) |
Christian Borntraeger | 719d93c | 2014-01-16 13:44:20 +0100 | [diff] [blame] | 477 | goto out_err_no_srcu; |
Paolo Bonzini | 00f034a | 2014-08-20 14:29:21 +0200 | [diff] [blame] | 478 | |
| 479 | /* |
| 480 | * Init kvm generation close to the maximum to easily test the |
| 481 | * code of handling generation number wrap-around. |
| 482 | */ |
| 483 | kvm->memslots->generation = -150; |
| 484 | |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 485 | kvm_init_memslots_id(kvm); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 486 | if (init_srcu_struct(&kvm->srcu)) |
Christian Borntraeger | 719d93c | 2014-01-16 13:44:20 +0100 | [diff] [blame] | 487 | goto out_err_no_srcu; |
| 488 | if (init_srcu_struct(&kvm->irq_srcu)) |
| 489 | goto out_err_no_irq_srcu; |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 490 | for (i = 0; i < KVM_NR_BUSES; i++) { |
| 491 | kvm->buses[i] = kzalloc(sizeof(struct kvm_io_bus), |
| 492 | GFP_KERNEL); |
Jan Kiszka | 57e7fbe | 2010-11-09 12:42:12 +0100 | [diff] [blame] | 493 | if (!kvm->buses[i]) |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 494 | goto out_err; |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 495 | } |
Mike Waychison | 74b5c5b | 2011-06-03 13:04:53 -0700 | [diff] [blame] | 496 | |
OGAWA Hirofumi | 85722cd | 2011-05-11 09:28:28 +0900 | [diff] [blame] | 497 | spin_lock_init(&kvm->mmu_lock); |
Avi Kivity | 6d4e4c4 | 2007-11-21 16:41:05 +0200 | [diff] [blame] | 498 | kvm->mm = current->mm; |
| 499 | atomic_inc(&kvm->mm->mm_count); |
Gregory Haskins | d34e6b1 | 2009-07-07 17:08:49 -0400 | [diff] [blame] | 500 | kvm_eventfd_init(kvm); |
Shaohua Li | 11ec280 | 2007-07-23 14:51:37 +0800 | [diff] [blame] | 501 | mutex_init(&kvm->lock); |
Marcelo Tosatti | 60eead7 | 2009-06-04 15:08:23 -0300 | [diff] [blame] | 502 | mutex_init(&kvm->irq_lock); |
Marcelo Tosatti | 79fac95 | 2009-12-23 14:35:26 -0200 | [diff] [blame] | 503 | mutex_init(&kvm->slots_lock); |
Izik Eidus | d39f13b | 2008-03-30 16:01:25 +0300 | [diff] [blame] | 504 | atomic_set(&kvm->users_count, 1); |
Scott Wood | 07f0a7b | 2013-04-25 14:11:23 +0000 | [diff] [blame] | 505 | INIT_LIST_HEAD(&kvm->devices); |
Mike Waychison | 74b5c5b | 2011-06-03 13:04:53 -0700 | [diff] [blame] | 506 | |
| 507 | r = kvm_init_mmu_notifier(kvm); |
| 508 | if (r) |
| 509 | goto out_err; |
| 510 | |
Paolo Bonzini | 2f303b7 | 2013-09-25 13:53:07 +0200 | [diff] [blame] | 511 | spin_lock(&kvm_lock); |
Rusty Russell | 5e58cfe | 2007-07-23 17:08:21 +1000 | [diff] [blame] | 512 | list_add(&kvm->vm_list, &vm_list); |
Paolo Bonzini | 2f303b7 | 2013-09-25 13:53:07 +0200 | [diff] [blame] | 513 | spin_unlock(&kvm_lock); |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 514 | |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 515 | return kvm; |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 516 | |
| 517 | out_err: |
Christian Borntraeger | 719d93c | 2014-01-16 13:44:20 +0100 | [diff] [blame] | 518 | cleanup_srcu_struct(&kvm->irq_srcu); |
| 519 | out_err_no_irq_srcu: |
Jan Kiszka | 57e7fbe | 2010-11-09 12:42:12 +0100 | [diff] [blame] | 520 | cleanup_srcu_struct(&kvm->srcu); |
Christian Borntraeger | 719d93c | 2014-01-16 13:44:20 +0100 | [diff] [blame] | 521 | out_err_no_srcu: |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 522 | hardware_disable_all(); |
Christian Borntraeger | 719d93c | 2014-01-16 13:44:20 +0100 | [diff] [blame] | 523 | out_err_no_disable: |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 524 | for (i = 0; i < KVM_NR_BUSES; i++) |
| 525 | kfree(kvm->buses[i]); |
Igor Mammedov | 7449613 | 2015-03-20 12:21:37 +0000 | [diff] [blame] | 526 | kvfree(kvm->memslots); |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 527 | kvm_arch_free_vm(kvm); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 528 | return ERR_PTR(r); |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 529 | } |
| 530 | |
Takuya Yoshikawa | 92eca8f | 2012-05-20 13:13:28 +0900 | [diff] [blame] | 531 | /* |
| 532 | * Avoid using vmalloc for a small buffer. |
| 533 | * Should not be used when the size is statically known. |
| 534 | */ |
Takuya Yoshikawa | c1a7b32 | 2012-05-20 13:15:07 +0900 | [diff] [blame] | 535 | void *kvm_kvzalloc(unsigned long size) |
Takuya Yoshikawa | 92eca8f | 2012-05-20 13:13:28 +0900 | [diff] [blame] | 536 | { |
| 537 | if (size > PAGE_SIZE) |
| 538 | return vzalloc(size); |
| 539 | else |
| 540 | return kzalloc(size, GFP_KERNEL); |
| 541 | } |
| 542 | |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 543 | static void kvm_destroy_dirty_bitmap(struct kvm_memory_slot *memslot) |
| 544 | { |
| 545 | if (!memslot->dirty_bitmap) |
| 546 | return; |
| 547 | |
Thomas Huth | 548ef28 | 2015-02-24 21:29:25 +0100 | [diff] [blame] | 548 | kvfree(memslot->dirty_bitmap); |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 549 | memslot->dirty_bitmap = NULL; |
| 550 | } |
| 551 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 552 | /* |
| 553 | * Free any memory in @free but not in @dont. |
| 554 | */ |
Aneesh Kumar K.V | 5587027 | 2013-10-07 22:18:00 +0530 | [diff] [blame] | 555 | static void kvm_free_physmem_slot(struct kvm *kvm, struct kvm_memory_slot *free, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 556 | struct kvm_memory_slot *dont) |
| 557 | { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 558 | if (!dont || free->dirty_bitmap != dont->dirty_bitmap) |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 559 | kvm_destroy_dirty_bitmap(free); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 560 | |
Aneesh Kumar K.V | 5587027 | 2013-10-07 22:18:00 +0530 | [diff] [blame] | 561 | kvm_arch_free_memslot(kvm, free, dont); |
Marcelo Tosatti | 05da455 | 2008-02-23 11:44:30 -0300 | [diff] [blame] | 562 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 563 | free->npages = 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 564 | } |
| 565 | |
Stephen Hemminger | 7940876 | 2013-12-29 12:12:29 -0800 | [diff] [blame] | 566 | static void kvm_free_physmem(struct kvm *kvm) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 567 | { |
Marcelo Tosatti | 46a26bf | 2009-12-23 14:35:16 -0200 | [diff] [blame] | 568 | struct kvm_memslots *slots = kvm->memslots; |
Xiao Guangrong | be6ba0f | 2011-11-24 17:39:18 +0800 | [diff] [blame] | 569 | struct kvm_memory_slot *memslot; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 570 | |
Xiao Guangrong | be6ba0f | 2011-11-24 17:39:18 +0800 | [diff] [blame] | 571 | kvm_for_each_memslot(memslot, slots) |
Aneesh Kumar K.V | 5587027 | 2013-10-07 22:18:00 +0530 | [diff] [blame] | 572 | kvm_free_physmem_slot(kvm, memslot, NULL); |
Marcelo Tosatti | 46a26bf | 2009-12-23 14:35:16 -0200 | [diff] [blame] | 573 | |
Igor Mammedov | 7449613 | 2015-03-20 12:21:37 +0000 | [diff] [blame] | 574 | kvfree(kvm->memslots); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 575 | } |
| 576 | |
Scott Wood | 07f0a7b | 2013-04-25 14:11:23 +0000 | [diff] [blame] | 577 | static void kvm_destroy_devices(struct kvm *kvm) |
| 578 | { |
| 579 | struct list_head *node, *tmp; |
| 580 | |
| 581 | list_for_each_safe(node, tmp, &kvm->devices) { |
| 582 | struct kvm_device *dev = |
| 583 | list_entry(node, struct kvm_device, vm_node); |
| 584 | |
| 585 | list_del(node); |
| 586 | dev->ops->destroy(dev); |
| 587 | } |
| 588 | } |
| 589 | |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 590 | static void kvm_destroy_vm(struct kvm *kvm) |
| 591 | { |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 592 | int i; |
Avi Kivity | 6d4e4c4 | 2007-11-21 16:41:05 +0200 | [diff] [blame] | 593 | struct mm_struct *mm = kvm->mm; |
| 594 | |
Sheng Yang | ad8ba2c | 2009-01-06 10:03:02 +0800 | [diff] [blame] | 595 | kvm_arch_sync_events(kvm); |
Paolo Bonzini | 2f303b7 | 2013-09-25 13:53:07 +0200 | [diff] [blame] | 596 | spin_lock(&kvm_lock); |
Avi Kivity | 133de90 | 2007-02-12 00:54:44 -0800 | [diff] [blame] | 597 | list_del(&kvm->vm_list); |
Paolo Bonzini | 2f303b7 | 2013-09-25 13:53:07 +0200 | [diff] [blame] | 598 | spin_unlock(&kvm_lock); |
Avi Kivity | 399ec80 | 2008-11-19 13:58:46 +0200 | [diff] [blame] | 599 | kvm_free_irq_routing(kvm); |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 600 | for (i = 0; i < KVM_NR_BUSES; i++) |
| 601 | kvm_io_bus_destroy(kvm->buses[i]); |
Avi Kivity | 980da6c | 2009-12-20 15:13:43 +0200 | [diff] [blame] | 602 | kvm_coalesced_mmio_free(kvm); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 603 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) |
| 604 | mmu_notifier_unregister(&kvm->mmu_notifier, kvm->mm); |
Gleb Natapov | f00be0c | 2009-03-19 12:20:36 +0200 | [diff] [blame] | 605 | #else |
Marcelo Tosatti | 2df72e9 | 2012-08-24 15:54:57 -0300 | [diff] [blame] | 606 | kvm_arch_flush_shadow_all(kvm); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 607 | #endif |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 608 | kvm_arch_destroy_vm(kvm); |
Scott Wood | 07f0a7b | 2013-04-25 14:11:23 +0000 | [diff] [blame] | 609 | kvm_destroy_devices(kvm); |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 610 | kvm_free_physmem(kvm); |
Paolo Bonzini | 820b3fc | 2014-06-03 13:44:17 +0200 | [diff] [blame] | 611 | cleanup_srcu_struct(&kvm->irq_srcu); |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 612 | cleanup_srcu_struct(&kvm->srcu); |
| 613 | kvm_arch_free_vm(kvm); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 614 | hardware_disable_all(); |
Avi Kivity | 6d4e4c4 | 2007-11-21 16:41:05 +0200 | [diff] [blame] | 615 | mmdrop(mm); |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 616 | } |
| 617 | |
Izik Eidus | d39f13b | 2008-03-30 16:01:25 +0300 | [diff] [blame] | 618 | void kvm_get_kvm(struct kvm *kvm) |
| 619 | { |
| 620 | atomic_inc(&kvm->users_count); |
| 621 | } |
| 622 | EXPORT_SYMBOL_GPL(kvm_get_kvm); |
| 623 | |
| 624 | void kvm_put_kvm(struct kvm *kvm) |
| 625 | { |
| 626 | if (atomic_dec_and_test(&kvm->users_count)) |
| 627 | kvm_destroy_vm(kvm); |
| 628 | } |
| 629 | EXPORT_SYMBOL_GPL(kvm_put_kvm); |
| 630 | |
| 631 | |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 632 | static int kvm_vm_release(struct inode *inode, struct file *filp) |
| 633 | { |
| 634 | struct kvm *kvm = filp->private_data; |
| 635 | |
Gregory Haskins | 721eecbf | 2009-05-20 10:30:49 -0400 | [diff] [blame] | 636 | kvm_irqfd_release(kvm); |
| 637 | |
Izik Eidus | d39f13b | 2008-03-30 16:01:25 +0300 | [diff] [blame] | 638 | kvm_put_kvm(kvm); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 639 | return 0; |
| 640 | } |
| 641 | |
Takuya Yoshikawa | 515a012 | 2010-10-27 18:23:54 +0900 | [diff] [blame] | 642 | /* |
| 643 | * Allocation size is twice as large as the actual dirty bitmap size. |
Takuya Yoshikawa | 93474b2 | 2012-03-01 19:34:45 +0900 | [diff] [blame] | 644 | * 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] | 645 | */ |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 646 | static int kvm_create_dirty_bitmap(struct kvm_memory_slot *memslot) |
| 647 | { |
Takuya Yoshikawa | 515a012 | 2010-10-27 18:23:54 +0900 | [diff] [blame] | 648 | unsigned long dirty_bytes = 2 * kvm_dirty_bitmap_bytes(memslot); |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 649 | |
Takuya Yoshikawa | 92eca8f | 2012-05-20 13:13:28 +0900 | [diff] [blame] | 650 | memslot->dirty_bitmap = kvm_kvzalloc(dirty_bytes); |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 651 | if (!memslot->dirty_bitmap) |
| 652 | return -ENOMEM; |
| 653 | |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 654 | return 0; |
| 655 | } |
| 656 | |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 657 | /* |
Igor Mammedov | 0e60b07 | 2014-12-01 17:29:26 +0000 | [diff] [blame] | 658 | * Insert memslot and re-sort memslots based on their GFN, |
| 659 | * so binary search could be used to lookup GFN. |
| 660 | * Sorting algorithm takes advantage of having initially |
| 661 | * sorted array and known changed memslot position. |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 662 | */ |
Paolo Bonzini | 5cc1502 | 2014-11-14 10:55:31 +0100 | [diff] [blame] | 663 | static void update_memslots(struct kvm_memslots *slots, |
| 664 | struct kvm_memory_slot *new) |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 665 | { |
Paolo Bonzini | 8593176 | 2014-11-14 10:22:07 +0100 | [diff] [blame] | 666 | int id = new->id; |
| 667 | int i = slots->id_to_index[id]; |
Igor Mammedov | 063584d | 2014-11-13 23:00:13 +0000 | [diff] [blame] | 668 | struct kvm_memory_slot *mslots = slots->memslots; |
Xiao Guangrong | f85e2cb | 2011-11-24 17:41:54 +0800 | [diff] [blame] | 669 | |
Paolo Bonzini | 8593176 | 2014-11-14 10:22:07 +0100 | [diff] [blame] | 670 | WARN_ON(mslots[i].id != id); |
Igor Mammedov | 9c1a5d38 | 2014-12-01 17:29:27 +0000 | [diff] [blame] | 671 | if (!new->npages) { |
Paolo Bonzini | dbaff30 | 2014-12-27 21:08:16 +0100 | [diff] [blame] | 672 | WARN_ON(!mslots[i].npages); |
Igor Mammedov | 0e60b07 | 2014-12-01 17:29:26 +0000 | [diff] [blame] | 673 | new->base_gfn = 0; |
Tiejun Chen | b0165f1 | 2015-01-09 16:29:14 +0800 | [diff] [blame] | 674 | new->flags = 0; |
Igor Mammedov | 9c1a5d38 | 2014-12-01 17:29:27 +0000 | [diff] [blame] | 675 | if (mslots[i].npages) |
| 676 | slots->used_slots--; |
| 677 | } else { |
| 678 | if (!mslots[i].npages) |
| 679 | slots->used_slots++; |
| 680 | } |
Igor Mammedov | 0e60b07 | 2014-12-01 17:29:26 +0000 | [diff] [blame] | 681 | |
Igor Mammedov | 7f379cf | 2014-12-01 17:29:24 +0000 | [diff] [blame] | 682 | while (i < KVM_MEM_SLOTS_NUM - 1 && |
Igor Mammedov | 0e60b07 | 2014-12-01 17:29:26 +0000 | [diff] [blame] | 683 | new->base_gfn <= mslots[i + 1].base_gfn) { |
| 684 | if (!mslots[i + 1].npages) |
| 685 | break; |
Igor Mammedov | 7f379cf | 2014-12-01 17:29:24 +0000 | [diff] [blame] | 686 | mslots[i] = mslots[i + 1]; |
| 687 | slots->id_to_index[mslots[i].id] = i; |
| 688 | i++; |
| 689 | } |
Paolo Bonzini | efbeec7 | 2014-12-27 18:01:00 +0100 | [diff] [blame] | 690 | |
| 691 | /* |
| 692 | * The ">=" is needed when creating a slot with base_gfn == 0, |
| 693 | * so that it moves before all those with base_gfn == npages == 0. |
| 694 | * |
| 695 | * On the other hand, if new->npages is zero, the above loop has |
| 696 | * already left i pointing to the beginning of the empty part of |
| 697 | * mslots, and the ">=" would move the hole backwards in this |
| 698 | * case---which is wrong. So skip the loop when deleting a slot. |
| 699 | */ |
| 700 | if (new->npages) { |
| 701 | while (i > 0 && |
| 702 | new->base_gfn >= mslots[i - 1].base_gfn) { |
| 703 | mslots[i] = mslots[i - 1]; |
| 704 | slots->id_to_index[mslots[i].id] = i; |
| 705 | i--; |
| 706 | } |
Paolo Bonzini | dbaff30 | 2014-12-27 21:08:16 +0100 | [diff] [blame] | 707 | } else |
| 708 | WARN_ON_ONCE(i != slots->used_slots); |
Xiao Guangrong | f85e2cb | 2011-11-24 17:41:54 +0800 | [diff] [blame] | 709 | |
Paolo Bonzini | 8593176 | 2014-11-14 10:22:07 +0100 | [diff] [blame] | 710 | mslots[i] = *new; |
| 711 | slots->id_to_index[mslots[i].id] = i; |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 712 | } |
| 713 | |
Xiao Guangrong | a50d64d | 2012-08-21 10:58:13 +0800 | [diff] [blame] | 714 | static int check_memory_region_flags(struct kvm_userspace_memory_region *mem) |
| 715 | { |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 716 | u32 valid_flags = KVM_MEM_LOG_DIRTY_PAGES; |
| 717 | |
Christoffer Dall | 0f8a4de | 2014-08-26 14:00:37 +0200 | [diff] [blame] | 718 | #ifdef __KVM_HAVE_READONLY_MEM |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 719 | valid_flags |= KVM_MEM_READONLY; |
| 720 | #endif |
| 721 | |
| 722 | if (mem->flags & ~valid_flags) |
Xiao Guangrong | a50d64d | 2012-08-21 10:58:13 +0800 | [diff] [blame] | 723 | return -EINVAL; |
| 724 | |
| 725 | return 0; |
| 726 | } |
| 727 | |
Gleb Natapov | 7ec4fb4 | 2012-12-24 17:49:30 +0200 | [diff] [blame] | 728 | static struct kvm_memslots *install_new_memslots(struct kvm *kvm, |
Paolo Bonzini | 5cc1502 | 2014-11-14 10:55:31 +0100 | [diff] [blame] | 729 | struct kvm_memslots *slots) |
Gleb Natapov | 7ec4fb4 | 2012-12-24 17:49:30 +0200 | [diff] [blame] | 730 | { |
| 731 | struct kvm_memslots *old_memslots = kvm->memslots; |
| 732 | |
David Matlack | ee3d157 | 2014-08-18 15:46:06 -0700 | [diff] [blame] | 733 | /* |
| 734 | * Set the low bit in the generation, which disables SPTE caching |
| 735 | * until the end of synchronize_srcu_expedited. |
| 736 | */ |
| 737 | WARN_ON(old_memslots->generation & 1); |
| 738 | slots->generation = old_memslots->generation + 1; |
| 739 | |
Gleb Natapov | 7ec4fb4 | 2012-12-24 17:49:30 +0200 | [diff] [blame] | 740 | rcu_assign_pointer(kvm->memslots, slots); |
| 741 | synchronize_srcu_expedited(&kvm->srcu); |
Takuya Yoshikawa | e59dbe0 | 2013-07-04 13:40:29 +0900 | [diff] [blame] | 742 | |
David Matlack | ee3d157 | 2014-08-18 15:46:06 -0700 | [diff] [blame] | 743 | /* |
| 744 | * Increment the new memslot generation a second time. This prevents |
| 745 | * vm exits that race with memslot updates from caching a memslot |
| 746 | * generation that will (potentially) be valid forever. |
| 747 | */ |
| 748 | slots->generation++; |
| 749 | |
Takuya Yoshikawa | e59dbe0 | 2013-07-04 13:40:29 +0900 | [diff] [blame] | 750 | kvm_arch_memslots_updated(kvm); |
| 751 | |
| 752 | return old_memslots; |
Gleb Natapov | 7ec4fb4 | 2012-12-24 17:49:30 +0200 | [diff] [blame] | 753 | } |
| 754 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 755 | /* |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 756 | * Allocate some memory and give it an address in the guest physical address |
| 757 | * space. |
| 758 | * |
| 759 | * Discontiguous memory is allowed, mostly for framebuffers. |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 760 | * |
Dominik Dingel | 02d5d55 | 2014-10-27 16:22:56 +0100 | [diff] [blame] | 761 | * Must be called holding kvm->slots_lock for write. |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 762 | */ |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 763 | int __kvm_set_memory_region(struct kvm *kvm, |
Takuya Yoshikawa | 47ae31e | 2013-02-27 19:43:00 +0900 | [diff] [blame] | 764 | struct kvm_userspace_memory_region *mem) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 765 | { |
Avi Kivity | 8234b22 | 2010-12-27 12:08:45 +0200 | [diff] [blame] | 766 | int r; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 767 | gfn_t base_gfn; |
Heiko Carstens | 28bcb11 | 2009-09-03 17:35:35 +0200 | [diff] [blame] | 768 | unsigned long npages; |
Takuya Yoshikawa | a843fac | 2013-01-11 18:27:43 +0900 | [diff] [blame] | 769 | struct kvm_memory_slot *slot; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 770 | struct kvm_memory_slot old, new; |
Alex Williamson | b7f69c5 | 2012-12-10 10:33:03 -0700 | [diff] [blame] | 771 | struct kvm_memslots *slots = NULL, *old_memslots; |
Takuya Yoshikawa | f64c039 | 2013-01-29 11:00:07 +0900 | [diff] [blame] | 772 | enum kvm_mr_change change; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 773 | |
Xiao Guangrong | a50d64d | 2012-08-21 10:58:13 +0800 | [diff] [blame] | 774 | r = check_memory_region_flags(mem); |
| 775 | if (r) |
| 776 | goto out; |
| 777 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 778 | r = -EINVAL; |
| 779 | /* General sanity checks */ |
| 780 | if (mem->memory_size & (PAGE_SIZE - 1)) |
| 781 | goto out; |
| 782 | if (mem->guest_phys_addr & (PAGE_SIZE - 1)) |
| 783 | goto out; |
Takuya Yoshikawa | fa3d315 | 2011-05-07 16:35:38 +0900 | [diff] [blame] | 784 | /* We can read the guest memory with __xxx_user() later on. */ |
Takuya Yoshikawa | 47ae31e | 2013-02-27 19:43:00 +0900 | [diff] [blame] | 785 | if ((mem->slot < KVM_USER_MEM_SLOTS) && |
Takuya Yoshikawa | fa3d315 | 2011-05-07 16:35:38 +0900 | [diff] [blame] | 786 | ((mem->userspace_addr & (PAGE_SIZE - 1)) || |
Heiko Carstens | 9e3bb6b | 2011-05-24 07:51:27 +0200 | [diff] [blame] | 787 | !access_ok(VERIFY_WRITE, |
| 788 | (void __user *)(unsigned long)mem->userspace_addr, |
| 789 | mem->memory_size))) |
Hollis Blanchard | 7874980 | 2008-11-07 13:32:12 -0600 | [diff] [blame] | 790 | goto out; |
Xiao Guangrong | 93a5cef | 2011-11-24 17:37:48 +0800 | [diff] [blame] | 791 | if (mem->slot >= KVM_MEM_SLOTS_NUM) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 792 | goto out; |
| 793 | if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr) |
| 794 | goto out; |
| 795 | |
Takuya Yoshikawa | a843fac | 2013-01-11 18:27:43 +0900 | [diff] [blame] | 796 | slot = id_to_memslot(kvm->memslots, mem->slot); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 797 | base_gfn = mem->guest_phys_addr >> PAGE_SHIFT; |
| 798 | npages = mem->memory_size >> PAGE_SHIFT; |
| 799 | |
Takuya Yoshikawa | 660c22c | 2010-04-13 22:47:24 +0900 | [diff] [blame] | 800 | if (npages > KVM_MEM_MAX_NR_PAGES) |
| 801 | goto out; |
| 802 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 803 | if (!npages) |
| 804 | mem->flags &= ~KVM_MEM_LOG_DIRTY_PAGES; |
| 805 | |
Takuya Yoshikawa | a843fac | 2013-01-11 18:27:43 +0900 | [diff] [blame] | 806 | new = old = *slot; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 807 | |
Avi Kivity | e36d96f | 2010-06-21 10:56:36 +0300 | [diff] [blame] | 808 | new.id = mem->slot; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 809 | new.base_gfn = base_gfn; |
| 810 | new.npages = npages; |
| 811 | new.flags = mem->flags; |
| 812 | |
Takuya Yoshikawa | f64c039 | 2013-01-29 11:00:07 +0900 | [diff] [blame] | 813 | if (npages) { |
| 814 | if (!old.npages) |
| 815 | change = KVM_MR_CREATE; |
| 816 | else { /* Modify an existing slot. */ |
| 817 | if ((mem->userspace_addr != old.userspace_addr) || |
Takuya Yoshikawa | 75d61fb | 2013-01-30 19:40:41 +0900 | [diff] [blame] | 818 | (npages != old.npages) || |
| 819 | ((new.flags ^ old.flags) & KVM_MEM_READONLY)) |
Takuya Yoshikawa | f64c039 | 2013-01-29 11:00:07 +0900 | [diff] [blame] | 820 | goto out; |
| 821 | |
| 822 | if (base_gfn != old.base_gfn) |
| 823 | change = KVM_MR_MOVE; |
| 824 | else if (new.flags != old.flags) |
| 825 | change = KVM_MR_FLAGS_ONLY; |
| 826 | else { /* Nothing to change. */ |
| 827 | r = 0; |
| 828 | goto out; |
| 829 | } |
| 830 | } |
| 831 | } else if (old.npages) { |
| 832 | change = KVM_MR_DELETE; |
| 833 | } else /* Modify a non-existent slot: disallowed. */ |
Takuya Yoshikawa | 0ea75e1 | 2013-01-11 18:26:10 +0900 | [diff] [blame] | 834 | goto out; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 835 | |
Takuya Yoshikawa | f64c039 | 2013-01-29 11:00:07 +0900 | [diff] [blame] | 836 | if ((change == KVM_MR_CREATE) || (change == KVM_MR_MOVE)) { |
Takuya Yoshikawa | 0a706be | 2013-01-11 18:26:55 +0900 | [diff] [blame] | 837 | /* Check for overlaps */ |
| 838 | r = -EEXIST; |
| 839 | kvm_for_each_memslot(slot, kvm->memslots) { |
Takuya Yoshikawa | a843fac | 2013-01-11 18:27:43 +0900 | [diff] [blame] | 840 | if ((slot->id >= KVM_USER_MEM_SLOTS) || |
| 841 | (slot->id == mem->slot)) |
Takuya Yoshikawa | 0a706be | 2013-01-11 18:26:55 +0900 | [diff] [blame] | 842 | continue; |
| 843 | if (!((base_gfn + npages <= slot->base_gfn) || |
| 844 | (base_gfn >= slot->base_gfn + slot->npages))) |
| 845 | goto out; |
| 846 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 847 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 848 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 849 | /* Free page dirty bitmap if unneeded */ |
| 850 | if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES)) |
Al Viro | 8b6d44c | 2007-02-09 16:38:40 +0000 | [diff] [blame] | 851 | new.dirty_bitmap = NULL; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 852 | |
| 853 | r = -ENOMEM; |
Takuya Yoshikawa | f64c039 | 2013-01-29 11:00:07 +0900 | [diff] [blame] | 854 | if (change == KVM_MR_CREATE) { |
Takuya Yoshikawa | 189a2f7 | 2012-02-08 13:01:09 +0900 | [diff] [blame] | 855 | new.userspace_addr = mem->userspace_addr; |
Takuya Yoshikawa | d89cc61 | 2012-08-01 18:03:28 +0900 | [diff] [blame] | 856 | |
Aneesh Kumar K.V | 5587027 | 2013-10-07 22:18:00 +0530 | [diff] [blame] | 857 | if (kvm_arch_create_memslot(kvm, &new, npages)) |
Takuya Yoshikawa | db3fe4e | 2012-02-08 13:02:18 +0900 | [diff] [blame] | 858 | goto out_free; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 859 | } |
Joerg Roedel | ec04b26 | 2009-06-19 15:16:23 +0200 | [diff] [blame] | 860 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 861 | /* Allocate page dirty bitmap if needed */ |
| 862 | if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) { |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 863 | if (kvm_create_dirty_bitmap(&new) < 0) |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 864 | goto out_free; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 865 | } |
| 866 | |
Igor Mammedov | 7449613 | 2015-03-20 12:21:37 +0000 | [diff] [blame] | 867 | slots = kvm_kvzalloc(sizeof(struct kvm_memslots)); |
Paolo Bonzini | f2a8103 | 2014-11-14 10:46:45 +0100 | [diff] [blame] | 868 | if (!slots) |
| 869 | goto out_free; |
Igor Mammedov | 7449613 | 2015-03-20 12:21:37 +0000 | [diff] [blame] | 870 | memcpy(slots, kvm->memslots, sizeof(struct kvm_memslots)); |
Paolo Bonzini | f2a8103 | 2014-11-14 10:46:45 +0100 | [diff] [blame] | 871 | |
Takuya Yoshikawa | f64c039 | 2013-01-29 11:00:07 +0900 | [diff] [blame] | 872 | if ((change == KVM_MR_DELETE) || (change == KVM_MR_MOVE)) { |
Xiao Guangrong | 28a3754 | 2011-11-24 19:04:35 +0800 | [diff] [blame] | 873 | slot = id_to_memslot(slots, mem->slot); |
| 874 | slot->flags |= KVM_MEMSLOT_INVALID; |
| 875 | |
Paolo Bonzini | 5cc1502 | 2014-11-14 10:55:31 +0100 | [diff] [blame] | 876 | old_memslots = install_new_memslots(kvm, slots); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 877 | |
Alex Williamson | e40f193 | 2012-12-10 10:32:57 -0700 | [diff] [blame] | 878 | /* slot was deleted or moved, clear iommu mapping */ |
| 879 | kvm_iommu_unmap_pages(kvm, &old); |
Marcelo Tosatti | 12d6e75 | 2012-08-24 15:54:58 -0300 | [diff] [blame] | 880 | /* From this point no new shadow pages pointing to a deleted, |
| 881 | * or moved, memslot will be created. |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 882 | * |
| 883 | * validation of sp->gfn happens in: |
Xiubo Li | b7d409d | 2015-02-26 14:58:24 +0800 | [diff] [blame] | 884 | * - gfn_to_hva (kvm_read_guest, gfn_to_pfn) |
| 885 | * - kvm_is_visible_gfn (mmu_check_roots) |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 886 | */ |
Marcelo Tosatti | 2df72e9 | 2012-08-24 15:54:57 -0300 | [diff] [blame] | 887 | kvm_arch_flush_shadow_memslot(kvm, slot); |
Paolo Bonzini | f2a8103 | 2014-11-14 10:46:45 +0100 | [diff] [blame] | 888 | |
| 889 | /* |
| 890 | * We can re-use the old_memslots from above, the only difference |
| 891 | * from the currently installed memslots is the invalid flag. This |
| 892 | * will get overwritten by update_memslots anyway. |
| 893 | */ |
Alex Williamson | b7f69c5 | 2012-12-10 10:33:03 -0700 | [diff] [blame] | 894 | slots = old_memslots; |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 895 | } |
Marcelo Tosatti | 34d4cb8 | 2008-07-10 20:49:31 -0300 | [diff] [blame] | 896 | |
Takuya Yoshikawa | 7b6195a | 2013-02-27 19:44:34 +0900 | [diff] [blame] | 897 | r = kvm_arch_prepare_memory_region(kvm, &new, mem, change); |
Marcelo Tosatti | f7784b8 | 2009-12-23 14:35:18 -0200 | [diff] [blame] | 898 | if (r) |
Alex Williamson | b7f69c5 | 2012-12-10 10:33:03 -0700 | [diff] [blame] | 899 | goto out_slots; |
Marcelo Tosatti | f7784b8 | 2009-12-23 14:35:18 -0200 | [diff] [blame] | 900 | |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 901 | /* actual memory is freed via old in kvm_free_physmem_slot below */ |
Takuya Yoshikawa | f64c039 | 2013-01-29 11:00:07 +0900 | [diff] [blame] | 902 | if (change == KVM_MR_DELETE) { |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 903 | new.dirty_bitmap = NULL; |
Takuya Yoshikawa | db3fe4e | 2012-02-08 13:02:18 +0900 | [diff] [blame] | 904 | memset(&new.arch, 0, sizeof(new.arch)); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 905 | } |
| 906 | |
Paolo Bonzini | 5cc1502 | 2014-11-14 10:55:31 +0100 | [diff] [blame] | 907 | update_memslots(slots, &new); |
| 908 | old_memslots = install_new_memslots(kvm, slots); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 909 | |
Takuya Yoshikawa | 8482644 | 2013-02-27 19:45:25 +0900 | [diff] [blame] | 910 | kvm_arch_commit_memory_region(kvm, mem, &old, change); |
Zhang Xiantao | 3ad82a7 | 2007-11-20 13:11:38 +0800 | [diff] [blame] | 911 | |
Aneesh Kumar K.V | 5587027 | 2013-10-07 22:18:00 +0530 | [diff] [blame] | 912 | kvm_free_physmem_slot(kvm, &old, &new); |
Igor Mammedov | 7449613 | 2015-03-20 12:21:37 +0000 | [diff] [blame] | 913 | kvfree(old_memslots); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 914 | |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 915 | /* |
| 916 | * IOMMU mapping: New slots need to be mapped. Old slots need to be |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 917 | * un-mapped and re-mapped if their base changes. Since base change |
| 918 | * unmapping is handled above with slot deletion, mapping alone is |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 919 | * needed here. Anything else the iommu might care about for existing |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 920 | * slots (size changes, userspace addr changes and read-only flag |
| 921 | * changes) is disallowed above, so any other attribute changes getting |
| 922 | * here can be skipped. |
Izik Eidus | 210c7c4 | 2007-10-24 23:52:57 +0200 | [diff] [blame] | 923 | */ |
| 924 | if ((change == KVM_MR_CREATE) || (change == KVM_MR_MOVE)) { |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 925 | r = kvm_iommu_map_pages(kvm, &new); |
Yang Zhang | e0230e1 | 2013-10-24 09:56:39 +0800 | [diff] [blame] | 926 | return r; |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 927 | } |
| 928 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 929 | return 0; |
| 930 | |
| 931 | out_slots: |
Igor Mammedov | 7449613 | 2015-03-20 12:21:37 +0000 | [diff] [blame] | 932 | kvfree(slots); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 933 | out_free: |
Aneesh Kumar K.V | 5587027 | 2013-10-07 22:18:00 +0530 | [diff] [blame] | 934 | kvm_free_physmem_slot(kvm, &new, &old); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 935 | out: |
| 936 | return r; |
Izik Eidus | 210c7c4 | 2007-10-24 23:52:57 +0200 | [diff] [blame] | 937 | } |
| 938 | EXPORT_SYMBOL_GPL(__kvm_set_memory_region); |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 939 | |
| 940 | int kvm_set_memory_region(struct kvm *kvm, |
Takuya Yoshikawa | 47ae31e | 2013-02-27 19:43:00 +0900 | [diff] [blame] | 941 | struct kvm_userspace_memory_region *mem) |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 942 | { |
| 943 | int r; |
| 944 | |
Marcelo Tosatti | 79fac95 | 2009-12-23 14:35:26 -0200 | [diff] [blame] | 945 | mutex_lock(&kvm->slots_lock); |
Takuya Yoshikawa | 47ae31e | 2013-02-27 19:43:00 +0900 | [diff] [blame] | 946 | r = __kvm_set_memory_region(kvm, mem); |
Marcelo Tosatti | 79fac95 | 2009-12-23 14:35:26 -0200 | [diff] [blame] | 947 | mutex_unlock(&kvm->slots_lock); |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 948 | return r; |
| 949 | } |
Izik Eidus | 210c7c4 | 2007-10-24 23:52:57 +0200 | [diff] [blame] | 950 | EXPORT_SYMBOL_GPL(kvm_set_memory_region); |
| 951 | |
Stephen Hemminger | 7940876 | 2013-12-29 12:12:29 -0800 | [diff] [blame] | 952 | static int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, |
| 953 | struct kvm_userspace_memory_region *mem) |
Izik Eidus | 210c7c4 | 2007-10-24 23:52:57 +0200 | [diff] [blame] | 954 | { |
Alex Williamson | bbacc0c | 2012-12-10 10:33:09 -0700 | [diff] [blame] | 955 | if (mem->slot >= KVM_USER_MEM_SLOTS) |
Izik Eidus | e0d62c7 | 2007-10-24 23:57:46 +0200 | [diff] [blame] | 956 | return -EINVAL; |
Takuya Yoshikawa | 47ae31e | 2013-02-27 19:43:00 +0900 | [diff] [blame] | 957 | return kvm_set_memory_region(kvm, mem); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 958 | } |
| 959 | |
Zhang Xiantao | 5bb064d | 2007-11-18 20:29:43 +0800 | [diff] [blame] | 960 | int kvm_get_dirty_log(struct kvm *kvm, |
| 961 | struct kvm_dirty_log *log, int *is_dirty) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 962 | { |
| 963 | struct kvm_memory_slot *memslot; |
| 964 | int r, i; |
Takuya Yoshikawa | 87bf6e7 | 2010-04-12 19:35:35 +0900 | [diff] [blame] | 965 | unsigned long n; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 966 | unsigned long any = 0; |
| 967 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 968 | r = -EINVAL; |
Alex Williamson | bbacc0c | 2012-12-10 10:33:09 -0700 | [diff] [blame] | 969 | if (log->slot >= KVM_USER_MEM_SLOTS) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 970 | goto out; |
| 971 | |
Xiao Guangrong | 28a3754 | 2011-11-24 19:04:35 +0800 | [diff] [blame] | 972 | memslot = id_to_memslot(kvm->memslots, log->slot); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 973 | r = -ENOENT; |
| 974 | if (!memslot->dirty_bitmap) |
| 975 | goto out; |
| 976 | |
Takuya Yoshikawa | 87bf6e7 | 2010-04-12 19:35:35 +0900 | [diff] [blame] | 977 | n = kvm_dirty_bitmap_bytes(memslot); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 978 | |
Uri Lublin | cd1a4a9 | 2007-02-22 16:43:09 +0200 | [diff] [blame] | 979 | for (i = 0; !any && i < n/sizeof(long); ++i) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 980 | any = memslot->dirty_bitmap[i]; |
| 981 | |
| 982 | r = -EFAULT; |
| 983 | if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n)) |
| 984 | goto out; |
| 985 | |
Zhang Xiantao | 5bb064d | 2007-11-18 20:29:43 +0800 | [diff] [blame] | 986 | if (any) |
| 987 | *is_dirty = 1; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 988 | |
| 989 | r = 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 990 | out: |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 991 | return r; |
| 992 | } |
Aneesh Kumar K.V | 2ba9f0d | 2013-10-07 22:17:59 +0530 | [diff] [blame] | 993 | EXPORT_SYMBOL_GPL(kvm_get_dirty_log); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 994 | |
Mario Smarduch | ba0513b | 2015-01-15 15:58:53 -0800 | [diff] [blame] | 995 | #ifdef CONFIG_KVM_GENERIC_DIRTYLOG_READ_PROTECT |
| 996 | /** |
| 997 | * kvm_get_dirty_log_protect - get a snapshot of dirty pages, and if any pages |
| 998 | * are dirty write protect them for next write. |
| 999 | * @kvm: pointer to kvm instance |
| 1000 | * @log: slot id and address to which we copy the log |
| 1001 | * @is_dirty: flag set if any page is dirty |
| 1002 | * |
| 1003 | * We need to keep it in mind that VCPU threads can write to the bitmap |
| 1004 | * concurrently. So, to avoid losing track of dirty pages we keep the |
| 1005 | * following order: |
| 1006 | * |
| 1007 | * 1. Take a snapshot of the bit and clear it if needed. |
| 1008 | * 2. Write protect the corresponding page. |
| 1009 | * 3. Copy the snapshot to the userspace. |
| 1010 | * 4. Upon return caller flushes TLB's if needed. |
| 1011 | * |
| 1012 | * Between 2 and 4, the guest may write to the page using the remaining TLB |
| 1013 | * entry. This is not a problem because the page is reported dirty using |
| 1014 | * the snapshot taken before and step 4 ensures that writes done after |
| 1015 | * exiting to userspace will be logged for the next call. |
| 1016 | * |
| 1017 | */ |
| 1018 | int kvm_get_dirty_log_protect(struct kvm *kvm, |
| 1019 | struct kvm_dirty_log *log, bool *is_dirty) |
| 1020 | { |
| 1021 | struct kvm_memory_slot *memslot; |
| 1022 | int r, i; |
| 1023 | unsigned long n; |
| 1024 | unsigned long *dirty_bitmap; |
| 1025 | unsigned long *dirty_bitmap_buffer; |
| 1026 | |
| 1027 | r = -EINVAL; |
| 1028 | if (log->slot >= KVM_USER_MEM_SLOTS) |
| 1029 | goto out; |
| 1030 | |
| 1031 | memslot = id_to_memslot(kvm->memslots, log->slot); |
| 1032 | |
| 1033 | dirty_bitmap = memslot->dirty_bitmap; |
| 1034 | r = -ENOENT; |
| 1035 | if (!dirty_bitmap) |
| 1036 | goto out; |
| 1037 | |
| 1038 | n = kvm_dirty_bitmap_bytes(memslot); |
| 1039 | |
| 1040 | dirty_bitmap_buffer = dirty_bitmap + n / sizeof(long); |
| 1041 | memset(dirty_bitmap_buffer, 0, n); |
| 1042 | |
| 1043 | spin_lock(&kvm->mmu_lock); |
| 1044 | *is_dirty = false; |
| 1045 | for (i = 0; i < n / sizeof(long); i++) { |
| 1046 | unsigned long mask; |
| 1047 | gfn_t offset; |
| 1048 | |
| 1049 | if (!dirty_bitmap[i]) |
| 1050 | continue; |
| 1051 | |
| 1052 | *is_dirty = true; |
| 1053 | |
| 1054 | mask = xchg(&dirty_bitmap[i], 0); |
| 1055 | dirty_bitmap_buffer[i] = mask; |
| 1056 | |
Takuya Yoshikawa | 58d2930 | 2015-03-17 16:19:58 +0900 | [diff] [blame] | 1057 | if (mask) { |
| 1058 | offset = i * BITS_PER_LONG; |
| 1059 | kvm_arch_mmu_enable_log_dirty_pt_masked(kvm, memslot, |
| 1060 | offset, mask); |
| 1061 | } |
Mario Smarduch | ba0513b | 2015-01-15 15:58:53 -0800 | [diff] [blame] | 1062 | } |
| 1063 | |
| 1064 | spin_unlock(&kvm->mmu_lock); |
| 1065 | |
| 1066 | r = -EFAULT; |
| 1067 | if (copy_to_user(log->dirty_bitmap, dirty_bitmap_buffer, n)) |
| 1068 | goto out; |
| 1069 | |
| 1070 | r = 0; |
| 1071 | out: |
| 1072 | return r; |
| 1073 | } |
| 1074 | EXPORT_SYMBOL_GPL(kvm_get_dirty_log_protect); |
| 1075 | #endif |
| 1076 | |
Takuya Yoshikawa | db3fe4e | 2012-02-08 13:02:18 +0900 | [diff] [blame] | 1077 | bool kvm_largepages_enabled(void) |
| 1078 | { |
| 1079 | return largepages_enabled; |
| 1080 | } |
| 1081 | |
Marcelo Tosatti | 54dee99 | 2009-06-11 12:07:44 -0300 | [diff] [blame] | 1082 | void kvm_disable_largepages(void) |
| 1083 | { |
| 1084 | largepages_enabled = false; |
| 1085 | } |
| 1086 | EXPORT_SYMBOL_GPL(kvm_disable_largepages); |
| 1087 | |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1088 | struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn) |
| 1089 | { |
| 1090 | return __gfn_to_memslot(kvm_memslots(kvm), gfn); |
| 1091 | } |
Avi Kivity | a1f4d395 | 2010-06-21 11:44:20 +0300 | [diff] [blame] | 1092 | EXPORT_SYMBOL_GPL(gfn_to_memslot); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1093 | |
Izik Eidus | e0d62c7 | 2007-10-24 23:57:46 +0200 | [diff] [blame] | 1094 | int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn) |
| 1095 | { |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 1096 | struct kvm_memory_slot *memslot = gfn_to_memslot(kvm, gfn); |
Izik Eidus | e0d62c7 | 2007-10-24 23:57:46 +0200 | [diff] [blame] | 1097 | |
Alex Williamson | bbacc0c | 2012-12-10 10:33:09 -0700 | [diff] [blame] | 1098 | if (!memslot || memslot->id >= KVM_USER_MEM_SLOTS || |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 1099 | memslot->flags & KVM_MEMSLOT_INVALID) |
| 1100 | return 0; |
Izik Eidus | e0d62c7 | 2007-10-24 23:57:46 +0200 | [diff] [blame] | 1101 | |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 1102 | return 1; |
Izik Eidus | e0d62c7 | 2007-10-24 23:57:46 +0200 | [diff] [blame] | 1103 | } |
| 1104 | EXPORT_SYMBOL_GPL(kvm_is_visible_gfn); |
| 1105 | |
Joerg Roedel | 8f0b1ab | 2010-01-28 12:37:56 +0100 | [diff] [blame] | 1106 | unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn) |
| 1107 | { |
| 1108 | struct vm_area_struct *vma; |
| 1109 | unsigned long addr, size; |
| 1110 | |
| 1111 | size = PAGE_SIZE; |
| 1112 | |
| 1113 | addr = gfn_to_hva(kvm, gfn); |
| 1114 | if (kvm_is_error_hva(addr)) |
| 1115 | return PAGE_SIZE; |
| 1116 | |
| 1117 | down_read(¤t->mm->mmap_sem); |
| 1118 | vma = find_vma(current->mm, addr); |
| 1119 | if (!vma) |
| 1120 | goto out; |
| 1121 | |
| 1122 | size = vma_kernel_pagesize(vma); |
| 1123 | |
| 1124 | out: |
| 1125 | up_read(¤t->mm->mmap_sem); |
| 1126 | |
| 1127 | return size; |
| 1128 | } |
| 1129 | |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1130 | static bool memslot_is_readonly(struct kvm_memory_slot *slot) |
| 1131 | { |
| 1132 | return slot->flags & KVM_MEM_READONLY; |
| 1133 | } |
| 1134 | |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1135 | static unsigned long __gfn_to_hva_many(struct kvm_memory_slot *slot, gfn_t gfn, |
| 1136 | gfn_t *nr_pages, bool write) |
Izik Eidus | 539cb66 | 2007-11-11 22:05:04 +0200 | [diff] [blame] | 1137 | { |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 1138 | if (!slot || slot->flags & KVM_MEMSLOT_INVALID) |
Xiao Guangrong | ca3a490 | 2012-08-21 11:01:50 +0800 | [diff] [blame] | 1139 | return KVM_HVA_ERR_BAD; |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 1140 | |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1141 | if (memslot_is_readonly(slot) && write) |
| 1142 | return KVM_HVA_ERR_RO_BAD; |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 1143 | |
| 1144 | if (nr_pages) |
| 1145 | *nr_pages = slot->npages - (gfn - slot->base_gfn); |
| 1146 | |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1147 | return __gfn_to_hva_memslot(slot, gfn); |
Izik Eidus | 539cb66 | 2007-11-11 22:05:04 +0200 | [diff] [blame] | 1148 | } |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 1149 | |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1150 | static unsigned long gfn_to_hva_many(struct kvm_memory_slot *slot, gfn_t gfn, |
| 1151 | gfn_t *nr_pages) |
| 1152 | { |
| 1153 | return __gfn_to_hva_many(slot, gfn, nr_pages, true); |
| 1154 | } |
| 1155 | |
| 1156 | unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, |
Stephen Hemminger | 7940876 | 2013-12-29 12:12:29 -0800 | [diff] [blame] | 1157 | gfn_t gfn) |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1158 | { |
| 1159 | return gfn_to_hva_many(slot, gfn, NULL); |
| 1160 | } |
| 1161 | EXPORT_SYMBOL_GPL(gfn_to_hva_memslot); |
| 1162 | |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 1163 | unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn) |
| 1164 | { |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1165 | return gfn_to_hva_many(gfn_to_memslot(kvm, gfn), gfn, NULL); |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 1166 | } |
Sheng Yang | 0d15029 | 2008-04-25 21:44:50 +0800 | [diff] [blame] | 1167 | EXPORT_SYMBOL_GPL(gfn_to_hva); |
Izik Eidus | 539cb66 | 2007-11-11 22:05:04 +0200 | [diff] [blame] | 1168 | |
Xiao Guangrong | 86ab8cf | 2012-08-21 10:59:53 +0800 | [diff] [blame] | 1169 | /* |
Paolo Bonzini | ba6a354 | 2013-09-09 13:52:33 +0200 | [diff] [blame] | 1170 | * If writable is set to false, the hva returned by this function is only |
| 1171 | * allowed to be read. |
Xiao Guangrong | 86ab8cf | 2012-08-21 10:59:53 +0800 | [diff] [blame] | 1172 | */ |
Christoffer Dall | 64d8312 | 2014-08-19 12:15:00 +0200 | [diff] [blame] | 1173 | unsigned long gfn_to_hva_memslot_prot(struct kvm_memory_slot *slot, |
| 1174 | gfn_t gfn, bool *writable) |
Gleb Natapov | 8030089 | 2010-10-19 18:13:41 +0200 | [diff] [blame] | 1175 | { |
Gleb Natapov | a2ac07f | 2013-10-01 19:58:36 +0300 | [diff] [blame] | 1176 | unsigned long hva = __gfn_to_hva_many(slot, gfn, NULL, false); |
| 1177 | |
| 1178 | if (!kvm_is_error_hva(hva) && writable) |
Paolo Bonzini | ba6a354 | 2013-09-09 13:52:33 +0200 | [diff] [blame] | 1179 | *writable = !memslot_is_readonly(slot); |
| 1180 | |
Gleb Natapov | a2ac07f | 2013-10-01 19:58:36 +0300 | [diff] [blame] | 1181 | return hva; |
Xiao Guangrong | 86ab8cf | 2012-08-21 10:59:53 +0800 | [diff] [blame] | 1182 | } |
| 1183 | |
Christoffer Dall | 64d8312 | 2014-08-19 12:15:00 +0200 | [diff] [blame] | 1184 | unsigned long gfn_to_hva_prot(struct kvm *kvm, gfn_t gfn, bool *writable) |
| 1185 | { |
| 1186 | struct kvm_memory_slot *slot = gfn_to_memslot(kvm, gfn); |
| 1187 | |
| 1188 | return gfn_to_hva_memslot_prot(slot, gfn, writable); |
| 1189 | } |
| 1190 | |
Geoff Levand | 39369f7 | 2013-04-05 19:20:30 +0000 | [diff] [blame] | 1191 | 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] | 1192 | unsigned long start, int write, struct page **page) |
| 1193 | { |
| 1194 | int flags = FOLL_TOUCH | FOLL_NOWAIT | FOLL_HWPOISON | FOLL_GET; |
| 1195 | |
| 1196 | if (write) |
| 1197 | flags |= FOLL_WRITE; |
| 1198 | |
| 1199 | return __get_user_pages(tsk, mm, start, 1, flags, page, NULL, NULL); |
| 1200 | } |
| 1201 | |
Huang Ying | fafc3db | 2011-01-30 11:15:49 +0800 | [diff] [blame] | 1202 | static inline int check_user_page_hwpoison(unsigned long addr) |
| 1203 | { |
| 1204 | int rc, flags = FOLL_TOUCH | FOLL_HWPOISON | FOLL_WRITE; |
| 1205 | |
| 1206 | rc = __get_user_pages(current, current->mm, addr, 1, |
| 1207 | flags, NULL, NULL, NULL); |
| 1208 | return rc == -EHWPOISON; |
| 1209 | } |
| 1210 | |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1211 | /* |
| 1212 | * The atomic path to get the writable pfn which will be stored in @pfn, |
| 1213 | * true indicates success, otherwise false is returned. |
| 1214 | */ |
| 1215 | static bool hva_to_pfn_fast(unsigned long addr, bool atomic, bool *async, |
| 1216 | bool write_fault, bool *writable, pfn_t *pfn) |
| 1217 | { |
| 1218 | struct page *page[1]; |
| 1219 | int npages; |
| 1220 | |
| 1221 | if (!(async || atomic)) |
| 1222 | return false; |
| 1223 | |
Xiao Guangrong | 12ce13f | 2012-08-21 11:00:49 +0800 | [diff] [blame] | 1224 | /* |
| 1225 | * Fast pin a writable pfn only if it is a write fault request |
| 1226 | * or the caller allows to map a writable pfn for a read fault |
| 1227 | * request. |
| 1228 | */ |
| 1229 | if (!(write_fault || writable)) |
| 1230 | return false; |
| 1231 | |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1232 | npages = __get_user_pages_fast(addr, 1, 1, page); |
| 1233 | if (npages == 1) { |
| 1234 | *pfn = page_to_pfn(page[0]); |
| 1235 | |
| 1236 | if (writable) |
| 1237 | *writable = true; |
| 1238 | return true; |
| 1239 | } |
| 1240 | |
| 1241 | return false; |
| 1242 | } |
| 1243 | |
| 1244 | /* |
| 1245 | * The slow path to get the pfn of the specified host virtual address, |
| 1246 | * 1 indicates success, -errno is returned if error is detected. |
| 1247 | */ |
| 1248 | static int hva_to_pfn_slow(unsigned long addr, bool *async, bool write_fault, |
| 1249 | bool *writable, pfn_t *pfn) |
Avi Kivity | 954bbbc | 2007-03-30 14:02:32 +0300 | [diff] [blame] | 1250 | { |
Anthony Liguori | 8d4e128 | 2007-10-18 09:59:34 -0500 | [diff] [blame] | 1251 | struct page *page[1]; |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 1252 | int npages = 0; |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1253 | |
| 1254 | might_sleep(); |
| 1255 | |
| 1256 | if (writable) |
| 1257 | *writable = write_fault; |
| 1258 | |
| 1259 | if (async) { |
| 1260 | down_read(¤t->mm->mmap_sem); |
| 1261 | npages = get_user_page_nowait(current, current->mm, |
| 1262 | addr, write_fault, page); |
| 1263 | up_read(¤t->mm->mmap_sem); |
Andrea Arcangeli | 0664e57 | 2015-02-11 15:27:28 -0800 | [diff] [blame] | 1264 | } else |
| 1265 | npages = __get_user_pages_unlocked(current, current->mm, addr, 1, |
| 1266 | write_fault, 0, page, |
| 1267 | FOLL_TOUCH|FOLL_HWPOISON); |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1268 | if (npages != 1) |
| 1269 | return npages; |
| 1270 | |
| 1271 | /* map read fault as writable if possible */ |
Xiao Guangrong | 12ce13f | 2012-08-21 11:00:49 +0800 | [diff] [blame] | 1272 | if (unlikely(!write_fault) && writable) { |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1273 | struct page *wpage[1]; |
| 1274 | |
| 1275 | npages = __get_user_pages_fast(addr, 1, 1, wpage); |
| 1276 | if (npages == 1) { |
| 1277 | *writable = true; |
| 1278 | put_page(page[0]); |
| 1279 | page[0] = wpage[0]; |
| 1280 | } |
| 1281 | |
| 1282 | npages = 1; |
| 1283 | } |
| 1284 | *pfn = page_to_pfn(page[0]); |
| 1285 | return npages; |
| 1286 | } |
| 1287 | |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1288 | static bool vma_is_valid(struct vm_area_struct *vma, bool write_fault) |
| 1289 | { |
| 1290 | if (unlikely(!(vma->vm_flags & VM_READ))) |
| 1291 | return false; |
| 1292 | |
| 1293 | if (write_fault && (unlikely(!(vma->vm_flags & VM_WRITE)))) |
| 1294 | return false; |
| 1295 | |
| 1296 | return true; |
| 1297 | } |
| 1298 | |
Xiao Guangrong | 12ce13f | 2012-08-21 11:00:49 +0800 | [diff] [blame] | 1299 | /* |
| 1300 | * Pin guest page in memory and return its pfn. |
| 1301 | * @addr: host virtual address which maps memory to the guest |
| 1302 | * @atomic: whether this function can sleep |
| 1303 | * @async: whether this function need to wait IO complete if the |
| 1304 | * host page is not in the memory |
| 1305 | * @write_fault: whether we should get a writable host page |
| 1306 | * @writable: whether it allows to map a writable host page for !@write_fault |
| 1307 | * |
| 1308 | * The function will map a writable host page for these two cases: |
| 1309 | * 1): @write_fault = true |
| 1310 | * 2): @write_fault = false && @writable, @writable will tell the caller |
| 1311 | * whether the mapping is writable. |
| 1312 | */ |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1313 | static pfn_t hva_to_pfn(unsigned long addr, bool atomic, bool *async, |
| 1314 | bool write_fault, bool *writable) |
| 1315 | { |
| 1316 | struct vm_area_struct *vma; |
| 1317 | pfn_t pfn = 0; |
| 1318 | int npages; |
Avi Kivity | 954bbbc | 2007-03-30 14:02:32 +0300 | [diff] [blame] | 1319 | |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 1320 | /* we can do it either atomically or asynchronously, not both */ |
| 1321 | BUG_ON(atomic && async); |
| 1322 | |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1323 | if (hva_to_pfn_fast(addr, atomic, async, write_fault, writable, &pfn)) |
| 1324 | return pfn; |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1325 | |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1326 | if (atomic) |
| 1327 | return KVM_PFN_ERR_FAULT; |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1328 | |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1329 | npages = hva_to_pfn_slow(addr, async, write_fault, writable, &pfn); |
| 1330 | if (npages == 1) |
| 1331 | return pfn; |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 1332 | |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1333 | down_read(¤t->mm->mmap_sem); |
| 1334 | if (npages == -EHWPOISON || |
| 1335 | (!async && check_user_page_hwpoison(addr))) { |
| 1336 | pfn = KVM_PFN_ERR_HWPOISON; |
| 1337 | goto exit; |
Xiao Guangrong | 887c08a | 2010-08-22 19:10:28 +0800 | [diff] [blame] | 1338 | } |
Izik Eidus | 539cb66 | 2007-11-11 22:05:04 +0200 | [diff] [blame] | 1339 | |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1340 | vma = find_vma_intersection(current->mm, addr, addr + 1); |
Anthony Liguori | 8d4e128 | 2007-10-18 09:59:34 -0500 | [diff] [blame] | 1341 | |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1342 | if (vma == NULL) |
| 1343 | pfn = KVM_PFN_ERR_FAULT; |
| 1344 | else if ((vma->vm_flags & VM_PFNMAP)) { |
| 1345 | pfn = ((addr - vma->vm_start) >> PAGE_SHIFT) + |
| 1346 | vma->vm_pgoff; |
Ard Biesheuvel | bf4bea8 | 2014-11-10 08:33:56 +0000 | [diff] [blame] | 1347 | BUG_ON(!kvm_is_reserved_pfn(pfn)); |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1348 | } else { |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1349 | if (async && vma_is_valid(vma, write_fault)) |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1350 | *async = true; |
| 1351 | pfn = KVM_PFN_ERR_FAULT; |
| 1352 | } |
| 1353 | exit: |
| 1354 | up_read(¤t->mm->mmap_sem); |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1355 | return pfn; |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1356 | } |
| 1357 | |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1358 | static pfn_t |
| 1359 | __gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn, bool atomic, |
| 1360 | bool *async, bool write_fault, bool *writable) |
Xiao Guangrong | 887c08a | 2010-08-22 19:10:28 +0800 | [diff] [blame] | 1361 | { |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1362 | unsigned long addr = __gfn_to_hva_many(slot, gfn, NULL, write_fault); |
| 1363 | |
| 1364 | if (addr == KVM_HVA_ERR_RO_BAD) |
| 1365 | return KVM_PFN_ERR_RO_FAULT; |
| 1366 | |
| 1367 | if (kvm_is_error_hva(addr)) |
Xiao Guangrong | 81c52c5 | 2012-10-16 20:10:59 +0800 | [diff] [blame] | 1368 | return KVM_PFN_NOSLOT; |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1369 | |
| 1370 | /* Do not map writable pfn in the readonly memslot. */ |
| 1371 | if (writable && memslot_is_readonly(slot)) { |
| 1372 | *writable = false; |
| 1373 | writable = NULL; |
| 1374 | } |
| 1375 | |
| 1376 | return hva_to_pfn(addr, atomic, async, write_fault, |
| 1377 | writable); |
Xiao Guangrong | 887c08a | 2010-08-22 19:10:28 +0800 | [diff] [blame] | 1378 | } |
Xiao Guangrong | 887c08a | 2010-08-22 19:10:28 +0800 | [diff] [blame] | 1379 | |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1380 | static pfn_t __gfn_to_pfn(struct kvm *kvm, gfn_t gfn, bool atomic, bool *async, |
| 1381 | bool write_fault, bool *writable) |
Marcelo Tosatti | 506f0d6 | 2009-12-23 14:35:19 -0200 | [diff] [blame] | 1382 | { |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1383 | struct kvm_memory_slot *slot; |
Marcelo Tosatti | 506f0d6 | 2009-12-23 14:35:19 -0200 | [diff] [blame] | 1384 | |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 1385 | if (async) |
| 1386 | *async = false; |
| 1387 | |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1388 | slot = gfn_to_memslot(kvm, gfn); |
Marcelo Tosatti | 506f0d6 | 2009-12-23 14:35:19 -0200 | [diff] [blame] | 1389 | |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1390 | return __gfn_to_pfn_memslot(slot, gfn, atomic, async, write_fault, |
| 1391 | writable); |
Xiao Guangrong | 365fb3f | 2010-08-28 19:24:13 +0800 | [diff] [blame] | 1392 | } |
| 1393 | |
| 1394 | pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn) |
| 1395 | { |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1396 | return __gfn_to_pfn(kvm, gfn, true, NULL, true, NULL); |
Xiao Guangrong | 365fb3f | 2010-08-28 19:24:13 +0800 | [diff] [blame] | 1397 | } |
| 1398 | EXPORT_SYMBOL_GPL(gfn_to_pfn_atomic); |
| 1399 | |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1400 | pfn_t gfn_to_pfn_async(struct kvm *kvm, gfn_t gfn, bool *async, |
| 1401 | bool write_fault, bool *writable) |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 1402 | { |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1403 | return __gfn_to_pfn(kvm, gfn, false, async, write_fault, writable); |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 1404 | } |
| 1405 | EXPORT_SYMBOL_GPL(gfn_to_pfn_async); |
| 1406 | |
Xiao Guangrong | 365fb3f | 2010-08-28 19:24:13 +0800 | [diff] [blame] | 1407 | pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn) |
| 1408 | { |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1409 | return __gfn_to_pfn(kvm, gfn, false, NULL, true, NULL); |
Marcelo Tosatti | 506f0d6 | 2009-12-23 14:35:19 -0200 | [diff] [blame] | 1410 | } |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1411 | EXPORT_SYMBOL_GPL(gfn_to_pfn); |
| 1412 | |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1413 | pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault, |
| 1414 | bool *writable) |
| 1415 | { |
| 1416 | return __gfn_to_pfn(kvm, gfn, false, NULL, write_fault, writable); |
| 1417 | } |
| 1418 | EXPORT_SYMBOL_GPL(gfn_to_pfn_prot); |
| 1419 | |
Xiao Guangrong | d566104 | 2012-07-17 21:56:16 +0800 | [diff] [blame] | 1420 | 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] | 1421 | { |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1422 | return __gfn_to_pfn_memslot(slot, gfn, false, NULL, true, NULL); |
Marcelo Tosatti | 506f0d6 | 2009-12-23 14:35:19 -0200 | [diff] [blame] | 1423 | } |
| 1424 | |
Xiao Guangrong | 037d92d | 2012-08-21 10:59:12 +0800 | [diff] [blame] | 1425 | pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn) |
| 1426 | { |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1427 | return __gfn_to_pfn_memslot(slot, gfn, true, NULL, true, NULL); |
Xiao Guangrong | 037d92d | 2012-08-21 10:59:12 +0800 | [diff] [blame] | 1428 | } |
| 1429 | EXPORT_SYMBOL_GPL(gfn_to_pfn_memslot_atomic); |
| 1430 | |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 1431 | int gfn_to_page_many_atomic(struct kvm *kvm, gfn_t gfn, struct page **pages, |
| 1432 | int nr_pages) |
| 1433 | { |
| 1434 | unsigned long addr; |
| 1435 | gfn_t entry; |
| 1436 | |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1437 | addr = gfn_to_hva_many(gfn_to_memslot(kvm, gfn), gfn, &entry); |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 1438 | if (kvm_is_error_hva(addr)) |
| 1439 | return -1; |
| 1440 | |
| 1441 | if (entry < nr_pages) |
| 1442 | return 0; |
| 1443 | |
| 1444 | return __get_user_pages_fast(addr, nr_pages, 1, pages); |
| 1445 | } |
| 1446 | EXPORT_SYMBOL_GPL(gfn_to_page_many_atomic); |
| 1447 | |
Xiao Guangrong | a276632 | 2012-07-26 11:58:59 +0800 | [diff] [blame] | 1448 | static struct page *kvm_pfn_to_page(pfn_t pfn) |
| 1449 | { |
Xiao Guangrong | 81c52c5 | 2012-10-16 20:10:59 +0800 | [diff] [blame] | 1450 | if (is_error_noslot_pfn(pfn)) |
Xiao Guangrong | 6cede2e | 2012-08-03 15:41:22 +0800 | [diff] [blame] | 1451 | return KVM_ERR_PTR_BAD_PAGE; |
Xiao Guangrong | a276632 | 2012-07-26 11:58:59 +0800 | [diff] [blame] | 1452 | |
Ard Biesheuvel | bf4bea8 | 2014-11-10 08:33:56 +0000 | [diff] [blame] | 1453 | if (kvm_is_reserved_pfn(pfn)) { |
Xiao Guangrong | cb9aaa3 | 2012-08-03 15:42:10 +0800 | [diff] [blame] | 1454 | WARN_ON(1); |
| 1455 | return KVM_ERR_PTR_BAD_PAGE; |
| 1456 | } |
| 1457 | |
Xiao Guangrong | a276632 | 2012-07-26 11:58:59 +0800 | [diff] [blame] | 1458 | return pfn_to_page(pfn); |
| 1459 | } |
| 1460 | |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1461 | struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn) |
| 1462 | { |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1463 | pfn_t pfn; |
| 1464 | |
| 1465 | pfn = gfn_to_pfn(kvm, gfn); |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1466 | |
Xiao Guangrong | a276632 | 2012-07-26 11:58:59 +0800 | [diff] [blame] | 1467 | return kvm_pfn_to_page(pfn); |
Avi Kivity | 954bbbc | 2007-03-30 14:02:32 +0300 | [diff] [blame] | 1468 | } |
| 1469 | EXPORT_SYMBOL_GPL(gfn_to_page); |
| 1470 | |
Izik Eidus | b4231d6 | 2007-11-20 11:49:33 +0200 | [diff] [blame] | 1471 | void kvm_release_page_clean(struct page *page) |
| 1472 | { |
Xiao Guangrong | 32cad84 | 2012-08-03 15:42:52 +0800 | [diff] [blame] | 1473 | WARN_ON(is_error_page(page)); |
| 1474 | |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1475 | kvm_release_pfn_clean(page_to_pfn(page)); |
Izik Eidus | b4231d6 | 2007-11-20 11:49:33 +0200 | [diff] [blame] | 1476 | } |
| 1477 | EXPORT_SYMBOL_GPL(kvm_release_page_clean); |
| 1478 | |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1479 | void kvm_release_pfn_clean(pfn_t pfn) |
| 1480 | { |
Ard Biesheuvel | bf4bea8 | 2014-11-10 08:33:56 +0000 | [diff] [blame] | 1481 | if (!is_error_noslot_pfn(pfn) && !kvm_is_reserved_pfn(pfn)) |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1482 | put_page(pfn_to_page(pfn)); |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1483 | } |
| 1484 | EXPORT_SYMBOL_GPL(kvm_release_pfn_clean); |
| 1485 | |
Izik Eidus | b4231d6 | 2007-11-20 11:49:33 +0200 | [diff] [blame] | 1486 | void kvm_release_page_dirty(struct page *page) |
Izik Eidus | 8a7ae05 | 2007-10-18 11:09:33 +0200 | [diff] [blame] | 1487 | { |
Xiao Guangrong | a276632 | 2012-07-26 11:58:59 +0800 | [diff] [blame] | 1488 | WARN_ON(is_error_page(page)); |
| 1489 | |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1490 | kvm_release_pfn_dirty(page_to_pfn(page)); |
Izik Eidus | 8a7ae05 | 2007-10-18 11:09:33 +0200 | [diff] [blame] | 1491 | } |
Izik Eidus | b4231d6 | 2007-11-20 11:49:33 +0200 | [diff] [blame] | 1492 | EXPORT_SYMBOL_GPL(kvm_release_page_dirty); |
Izik Eidus | 8a7ae05 | 2007-10-18 11:09:33 +0200 | [diff] [blame] | 1493 | |
Stephen Hemminger | 7940876 | 2013-12-29 12:12:29 -0800 | [diff] [blame] | 1494 | static void kvm_release_pfn_dirty(pfn_t pfn) |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1495 | { |
| 1496 | kvm_set_pfn_dirty(pfn); |
| 1497 | kvm_release_pfn_clean(pfn); |
| 1498 | } |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1499 | |
| 1500 | void kvm_set_pfn_dirty(pfn_t pfn) |
| 1501 | { |
Ard Biesheuvel | bf4bea8 | 2014-11-10 08:33:56 +0000 | [diff] [blame] | 1502 | if (!kvm_is_reserved_pfn(pfn)) { |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1503 | struct page *page = pfn_to_page(pfn); |
Xiubo Li | f95ef0c | 2015-02-26 14:58:23 +0800 | [diff] [blame] | 1504 | |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1505 | if (!PageReserved(page)) |
| 1506 | SetPageDirty(page); |
| 1507 | } |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1508 | } |
| 1509 | EXPORT_SYMBOL_GPL(kvm_set_pfn_dirty); |
| 1510 | |
| 1511 | void kvm_set_pfn_accessed(pfn_t pfn) |
| 1512 | { |
Ard Biesheuvel | bf4bea8 | 2014-11-10 08:33:56 +0000 | [diff] [blame] | 1513 | if (!kvm_is_reserved_pfn(pfn)) |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1514 | mark_page_accessed(pfn_to_page(pfn)); |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1515 | } |
| 1516 | EXPORT_SYMBOL_GPL(kvm_set_pfn_accessed); |
| 1517 | |
| 1518 | void kvm_get_pfn(pfn_t pfn) |
| 1519 | { |
Ard Biesheuvel | bf4bea8 | 2014-11-10 08:33:56 +0000 | [diff] [blame] | 1520 | if (!kvm_is_reserved_pfn(pfn)) |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1521 | get_page(pfn_to_page(pfn)); |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1522 | } |
| 1523 | EXPORT_SYMBOL_GPL(kvm_get_pfn); |
| 1524 | |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1525 | static int next_segment(unsigned long len, int offset) |
| 1526 | { |
| 1527 | if (len > PAGE_SIZE - offset) |
| 1528 | return PAGE_SIZE - offset; |
| 1529 | else |
| 1530 | return len; |
| 1531 | } |
| 1532 | |
| 1533 | int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, |
| 1534 | int len) |
| 1535 | { |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1536 | int r; |
| 1537 | unsigned long addr; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1538 | |
Paolo Bonzini | ba6a354 | 2013-09-09 13:52:33 +0200 | [diff] [blame] | 1539 | addr = gfn_to_hva_prot(kvm, gfn, NULL); |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1540 | if (kvm_is_error_hva(addr)) |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1541 | return -EFAULT; |
Paolo Bonzini | 3180a7f | 2015-04-02 14:08:20 +0200 | [diff] [blame] | 1542 | r = __copy_from_user(data, (void __user *)addr + offset, len); |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1543 | if (r) |
| 1544 | return -EFAULT; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1545 | return 0; |
| 1546 | } |
| 1547 | EXPORT_SYMBOL_GPL(kvm_read_guest_page); |
| 1548 | |
| 1549 | int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len) |
| 1550 | { |
| 1551 | gfn_t gfn = gpa >> PAGE_SHIFT; |
| 1552 | int seg; |
| 1553 | int offset = offset_in_page(gpa); |
| 1554 | int ret; |
| 1555 | |
| 1556 | while ((seg = next_segment(len, offset)) != 0) { |
| 1557 | ret = kvm_read_guest_page(kvm, gfn, data, offset, seg); |
| 1558 | if (ret < 0) |
| 1559 | return ret; |
| 1560 | offset = 0; |
| 1561 | len -= seg; |
| 1562 | data += seg; |
| 1563 | ++gfn; |
| 1564 | } |
| 1565 | return 0; |
| 1566 | } |
| 1567 | EXPORT_SYMBOL_GPL(kvm_read_guest); |
| 1568 | |
Marcelo Tosatti | 7ec5458 | 2007-12-20 19:18:23 -0500 | [diff] [blame] | 1569 | int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, |
| 1570 | unsigned long len) |
| 1571 | { |
| 1572 | int r; |
| 1573 | unsigned long addr; |
| 1574 | gfn_t gfn = gpa >> PAGE_SHIFT; |
| 1575 | int offset = offset_in_page(gpa); |
| 1576 | |
Paolo Bonzini | ba6a354 | 2013-09-09 13:52:33 +0200 | [diff] [blame] | 1577 | addr = gfn_to_hva_prot(kvm, gfn, NULL); |
Marcelo Tosatti | 7ec5458 | 2007-12-20 19:18:23 -0500 | [diff] [blame] | 1578 | if (kvm_is_error_hva(addr)) |
| 1579 | return -EFAULT; |
Andrea Arcangeli | 0aac03f | 2008-01-30 19:57:35 +0100 | [diff] [blame] | 1580 | pagefault_disable(); |
Paolo Bonzini | 3180a7f | 2015-04-02 14:08:20 +0200 | [diff] [blame] | 1581 | r = __copy_from_user_inatomic(data, (void __user *)addr + offset, len); |
Andrea Arcangeli | 0aac03f | 2008-01-30 19:57:35 +0100 | [diff] [blame] | 1582 | pagefault_enable(); |
Marcelo Tosatti | 7ec5458 | 2007-12-20 19:18:23 -0500 | [diff] [blame] | 1583 | if (r) |
| 1584 | return -EFAULT; |
| 1585 | return 0; |
| 1586 | } |
| 1587 | EXPORT_SYMBOL(kvm_read_guest_atomic); |
| 1588 | |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1589 | int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, const void *data, |
| 1590 | int offset, int len) |
| 1591 | { |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1592 | int r; |
| 1593 | unsigned long addr; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1594 | |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1595 | addr = gfn_to_hva(kvm, gfn); |
| 1596 | if (kvm_is_error_hva(addr)) |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1597 | return -EFAULT; |
Xiao Guangrong | 8b0cedf | 2011-05-15 23:22:04 +0800 | [diff] [blame] | 1598 | r = __copy_to_user((void __user *)addr + offset, data, len); |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1599 | if (r) |
| 1600 | return -EFAULT; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1601 | mark_page_dirty(kvm, gfn); |
| 1602 | return 0; |
| 1603 | } |
| 1604 | EXPORT_SYMBOL_GPL(kvm_write_guest_page); |
| 1605 | |
| 1606 | int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, |
| 1607 | unsigned long len) |
| 1608 | { |
| 1609 | gfn_t gfn = gpa >> PAGE_SHIFT; |
| 1610 | int seg; |
| 1611 | int offset = offset_in_page(gpa); |
| 1612 | int ret; |
| 1613 | |
| 1614 | while ((seg = next_segment(len, offset)) != 0) { |
| 1615 | ret = kvm_write_guest_page(kvm, gfn, data, offset, seg); |
| 1616 | if (ret < 0) |
| 1617 | return ret; |
| 1618 | offset = 0; |
| 1619 | len -= seg; |
| 1620 | data += seg; |
| 1621 | ++gfn; |
| 1622 | } |
| 1623 | return 0; |
| 1624 | } |
Wincy Van | ff651cb | 2014-12-11 08:52:58 +0300 | [diff] [blame] | 1625 | EXPORT_SYMBOL_GPL(kvm_write_guest); |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1626 | |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1627 | int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc, |
Andrew Honig | 8f96452 | 2013-03-29 09:35:21 -0700 | [diff] [blame] | 1628 | gpa_t gpa, unsigned long len) |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1629 | { |
| 1630 | struct kvm_memslots *slots = kvm_memslots(kvm); |
| 1631 | int offset = offset_in_page(gpa); |
Andrew Honig | 8f96452 | 2013-03-29 09:35:21 -0700 | [diff] [blame] | 1632 | gfn_t start_gfn = gpa >> PAGE_SHIFT; |
| 1633 | gfn_t end_gfn = (gpa + len - 1) >> PAGE_SHIFT; |
| 1634 | gfn_t nr_pages_needed = end_gfn - start_gfn + 1; |
| 1635 | gfn_t nr_pages_avail; |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1636 | |
| 1637 | ghc->gpa = gpa; |
| 1638 | ghc->generation = slots->generation; |
Andrew Honig | 8f96452 | 2013-03-29 09:35:21 -0700 | [diff] [blame] | 1639 | ghc->len = len; |
| 1640 | ghc->memslot = gfn_to_memslot(kvm, start_gfn); |
Radim Krčmář | ca3f087 | 2015-04-08 14:16:48 +0200 | [diff] [blame] | 1641 | ghc->hva = gfn_to_hva_many(ghc->memslot, start_gfn, NULL); |
| 1642 | if (!kvm_is_error_hva(ghc->hva) && nr_pages_needed <= 1) { |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1643 | ghc->hva += offset; |
Andrew Honig | 8f96452 | 2013-03-29 09:35:21 -0700 | [diff] [blame] | 1644 | } else { |
| 1645 | /* |
| 1646 | * If the requested region crosses two memslots, we still |
| 1647 | * verify that the entire region is valid here. |
| 1648 | */ |
| 1649 | while (start_gfn <= end_gfn) { |
| 1650 | ghc->memslot = gfn_to_memslot(kvm, start_gfn); |
| 1651 | ghc->hva = gfn_to_hva_many(ghc->memslot, start_gfn, |
| 1652 | &nr_pages_avail); |
| 1653 | if (kvm_is_error_hva(ghc->hva)) |
| 1654 | return -EFAULT; |
| 1655 | start_gfn += nr_pages_avail; |
| 1656 | } |
| 1657 | /* Use the slow path for cross page reads and writes. */ |
| 1658 | ghc->memslot = NULL; |
| 1659 | } |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1660 | return 0; |
| 1661 | } |
| 1662 | EXPORT_SYMBOL_GPL(kvm_gfn_to_hva_cache_init); |
| 1663 | |
| 1664 | int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, |
| 1665 | void *data, unsigned long len) |
| 1666 | { |
| 1667 | struct kvm_memslots *slots = kvm_memslots(kvm); |
| 1668 | int r; |
| 1669 | |
Andrew Honig | 8f96452 | 2013-03-29 09:35:21 -0700 | [diff] [blame] | 1670 | BUG_ON(len > ghc->len); |
| 1671 | |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1672 | if (slots->generation != ghc->generation) |
Andrew Honig | 8f96452 | 2013-03-29 09:35:21 -0700 | [diff] [blame] | 1673 | kvm_gfn_to_hva_cache_init(kvm, ghc, ghc->gpa, ghc->len); |
| 1674 | |
| 1675 | if (unlikely(!ghc->memslot)) |
| 1676 | return kvm_write_guest(kvm, ghc->gpa, data, len); |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1677 | |
| 1678 | if (kvm_is_error_hva(ghc->hva)) |
| 1679 | return -EFAULT; |
| 1680 | |
Xiao Guangrong | 8b0cedf | 2011-05-15 23:22:04 +0800 | [diff] [blame] | 1681 | r = __copy_to_user((void __user *)ghc->hva, data, len); |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1682 | if (r) |
| 1683 | return -EFAULT; |
| 1684 | mark_page_dirty_in_slot(kvm, ghc->memslot, ghc->gpa >> PAGE_SHIFT); |
| 1685 | |
| 1686 | return 0; |
| 1687 | } |
| 1688 | EXPORT_SYMBOL_GPL(kvm_write_guest_cached); |
| 1689 | |
Gleb Natapov | e03b644 | 2011-07-11 15:28:11 -0400 | [diff] [blame] | 1690 | int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, |
| 1691 | void *data, unsigned long len) |
| 1692 | { |
| 1693 | struct kvm_memslots *slots = kvm_memslots(kvm); |
| 1694 | int r; |
| 1695 | |
Andrew Honig | 8f96452 | 2013-03-29 09:35:21 -0700 | [diff] [blame] | 1696 | BUG_ON(len > ghc->len); |
| 1697 | |
Gleb Natapov | e03b644 | 2011-07-11 15:28:11 -0400 | [diff] [blame] | 1698 | if (slots->generation != ghc->generation) |
Andrew Honig | 8f96452 | 2013-03-29 09:35:21 -0700 | [diff] [blame] | 1699 | kvm_gfn_to_hva_cache_init(kvm, ghc, ghc->gpa, ghc->len); |
| 1700 | |
| 1701 | if (unlikely(!ghc->memslot)) |
| 1702 | return kvm_read_guest(kvm, ghc->gpa, data, len); |
Gleb Natapov | e03b644 | 2011-07-11 15:28:11 -0400 | [diff] [blame] | 1703 | |
| 1704 | if (kvm_is_error_hva(ghc->hva)) |
| 1705 | return -EFAULT; |
| 1706 | |
| 1707 | r = __copy_from_user(data, (void __user *)ghc->hva, len); |
| 1708 | if (r) |
| 1709 | return -EFAULT; |
| 1710 | |
| 1711 | return 0; |
| 1712 | } |
| 1713 | EXPORT_SYMBOL_GPL(kvm_read_guest_cached); |
| 1714 | |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1715 | int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len) |
| 1716 | { |
Heiko Carstens | 8a3caa6 | 2013-11-18 10:35:55 +0100 | [diff] [blame] | 1717 | const void *zero_page = (const void *) __va(page_to_phys(ZERO_PAGE(0))); |
| 1718 | |
| 1719 | return kvm_write_guest_page(kvm, gfn, zero_page, offset, len); |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1720 | } |
| 1721 | EXPORT_SYMBOL_GPL(kvm_clear_guest_page); |
| 1722 | |
| 1723 | int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len) |
| 1724 | { |
| 1725 | gfn_t gfn = gpa >> PAGE_SHIFT; |
| 1726 | int seg; |
| 1727 | int offset = offset_in_page(gpa); |
| 1728 | int ret; |
| 1729 | |
Kevin Mulvey | bfda0e8 | 2015-02-20 08:21:36 -0500 | [diff] [blame] | 1730 | while ((seg = next_segment(len, offset)) != 0) { |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1731 | ret = kvm_clear_guest_page(kvm, gfn, offset, seg); |
| 1732 | if (ret < 0) |
| 1733 | return ret; |
| 1734 | offset = 0; |
| 1735 | len -= seg; |
| 1736 | ++gfn; |
| 1737 | } |
| 1738 | return 0; |
| 1739 | } |
| 1740 | EXPORT_SYMBOL_GPL(kvm_clear_guest); |
| 1741 | |
Stephen Hemminger | 7940876 | 2013-12-29 12:12:29 -0800 | [diff] [blame] | 1742 | static void mark_page_dirty_in_slot(struct kvm *kvm, |
| 1743 | struct kvm_memory_slot *memslot, |
| 1744 | gfn_t gfn) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1745 | { |
Rusty Russell | 7e9d619 | 2007-07-31 20:41:14 +1000 | [diff] [blame] | 1746 | if (memslot && memslot->dirty_bitmap) { |
| 1747 | unsigned long rel_gfn = gfn - memslot->base_gfn; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1748 | |
Takuya Yoshikawa | b74ca3b | 2012-10-04 17:13:12 -0700 | [diff] [blame] | 1749 | set_bit_le(rel_gfn, memslot->dirty_bitmap); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1750 | } |
| 1751 | } |
| 1752 | |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1753 | void mark_page_dirty(struct kvm *kvm, gfn_t gfn) |
| 1754 | { |
| 1755 | struct kvm_memory_slot *memslot; |
| 1756 | |
| 1757 | memslot = gfn_to_memslot(kvm, gfn); |
| 1758 | mark_page_dirty_in_slot(kvm, memslot, gfn); |
| 1759 | } |
Aneesh Kumar K.V | 2ba9f0d | 2013-10-07 22:17:59 +0530 | [diff] [blame] | 1760 | EXPORT_SYMBOL_GPL(mark_page_dirty); |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1761 | |
Paolo Bonzini | f781951 | 2015-02-04 18:20:58 +0100 | [diff] [blame] | 1762 | static int kvm_vcpu_check_block(struct kvm_vcpu *vcpu) |
| 1763 | { |
| 1764 | if (kvm_arch_vcpu_runnable(vcpu)) { |
| 1765 | kvm_make_request(KVM_REQ_UNHALT, vcpu); |
| 1766 | return -EINTR; |
| 1767 | } |
| 1768 | if (kvm_cpu_has_pending_timer(vcpu)) |
| 1769 | return -EINTR; |
| 1770 | if (signal_pending(current)) |
| 1771 | return -EINTR; |
| 1772 | |
| 1773 | return 0; |
| 1774 | } |
| 1775 | |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1776 | /* |
| 1777 | * The vCPU has executed a HLT instruction with in-kernel mode enabled. |
| 1778 | */ |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 1779 | void kvm_vcpu_block(struct kvm_vcpu *vcpu) |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1780 | { |
Paolo Bonzini | f781951 | 2015-02-04 18:20:58 +0100 | [diff] [blame] | 1781 | ktime_t start, cur; |
Marcelo Tosatti | e5c239c | 2008-05-08 19:47:01 -0300 | [diff] [blame] | 1782 | DEFINE_WAIT(wait); |
Paolo Bonzini | f781951 | 2015-02-04 18:20:58 +0100 | [diff] [blame] | 1783 | bool waited = false; |
| 1784 | |
| 1785 | start = cur = ktime_get(); |
| 1786 | if (halt_poll_ns) { |
| 1787 | ktime_t stop = ktime_add_ns(ktime_get(), halt_poll_ns); |
Xiubo Li | f95ef0c | 2015-02-26 14:58:23 +0800 | [diff] [blame] | 1788 | |
Paolo Bonzini | f781951 | 2015-02-04 18:20:58 +0100 | [diff] [blame] | 1789 | do { |
| 1790 | /* |
| 1791 | * This sets KVM_REQ_UNHALT if an interrupt |
| 1792 | * arrives. |
| 1793 | */ |
| 1794 | if (kvm_vcpu_check_block(vcpu) < 0) { |
| 1795 | ++vcpu->stat.halt_successful_poll; |
| 1796 | goto out; |
| 1797 | } |
| 1798 | cur = ktime_get(); |
| 1799 | } while (single_task_running() && ktime_before(cur, stop)); |
| 1800 | } |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1801 | |
Marcelo Tosatti | e5c239c | 2008-05-08 19:47:01 -0300 | [diff] [blame] | 1802 | for (;;) { |
| 1803 | prepare_to_wait(&vcpu->wq, &wait, TASK_INTERRUPTIBLE); |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1804 | |
Paolo Bonzini | f781951 | 2015-02-04 18:20:58 +0100 | [diff] [blame] | 1805 | if (kvm_vcpu_check_block(vcpu) < 0) |
Marcelo Tosatti | e5c239c | 2008-05-08 19:47:01 -0300 | [diff] [blame] | 1806 | break; |
| 1807 | |
Paolo Bonzini | f781951 | 2015-02-04 18:20:58 +0100 | [diff] [blame] | 1808 | waited = true; |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1809 | schedule(); |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1810 | } |
| 1811 | |
Marcelo Tosatti | e5c239c | 2008-05-08 19:47:01 -0300 | [diff] [blame] | 1812 | finish_wait(&vcpu->wq, &wait); |
Paolo Bonzini | f781951 | 2015-02-04 18:20:58 +0100 | [diff] [blame] | 1813 | cur = ktime_get(); |
| 1814 | |
| 1815 | out: |
| 1816 | trace_kvm_vcpu_wakeup(ktime_to_ns(cur) - ktime_to_ns(start), waited); |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1817 | } |
Aneesh Kumar K.V | 2ba9f0d | 2013-10-07 22:17:59 +0530 | [diff] [blame] | 1818 | EXPORT_SYMBOL_GPL(kvm_vcpu_block); |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1819 | |
Marcelo Tosatti | 8c84780 | 2012-03-14 17:58:48 -0300 | [diff] [blame] | 1820 | #ifndef CONFIG_S390 |
Christoffer Dall | b6d3383 | 2012-03-08 16:44:24 -0500 | [diff] [blame] | 1821 | /* |
| 1822 | * Kick a sleeping VCPU, or a guest VCPU in guest mode, into host kernel mode. |
| 1823 | */ |
| 1824 | void kvm_vcpu_kick(struct kvm_vcpu *vcpu) |
| 1825 | { |
| 1826 | int me; |
| 1827 | int cpu = vcpu->cpu; |
| 1828 | wait_queue_head_t *wqp; |
| 1829 | |
| 1830 | wqp = kvm_arch_vcpu_wq(vcpu); |
| 1831 | if (waitqueue_active(wqp)) { |
| 1832 | wake_up_interruptible(wqp); |
| 1833 | ++vcpu->stat.halt_wakeup; |
| 1834 | } |
| 1835 | |
| 1836 | me = get_cpu(); |
| 1837 | if (cpu != me && (unsigned)cpu < nr_cpu_ids && cpu_online(cpu)) |
| 1838 | if (kvm_arch_vcpu_should_kick(vcpu)) |
| 1839 | smp_send_reschedule(cpu); |
| 1840 | put_cpu(); |
| 1841 | } |
Yang Zhang | a20ed54 | 2013-04-11 19:25:15 +0800 | [diff] [blame] | 1842 | EXPORT_SYMBOL_GPL(kvm_vcpu_kick); |
Marcelo Tosatti | 8c84780 | 2012-03-14 17:58:48 -0300 | [diff] [blame] | 1843 | #endif /* !CONFIG_S390 */ |
Christoffer Dall | b6d3383 | 2012-03-08 16:44:24 -0500 | [diff] [blame] | 1844 | |
Dan Carpenter | fa93384 | 2014-05-23 13:20:42 +0300 | [diff] [blame] | 1845 | int kvm_vcpu_yield_to(struct kvm_vcpu *target) |
Konstantin Weitz | 41628d3 | 2012-04-25 15:30:38 +0200 | [diff] [blame] | 1846 | { |
| 1847 | struct pid *pid; |
| 1848 | struct task_struct *task = NULL; |
Dan Carpenter | fa93384 | 2014-05-23 13:20:42 +0300 | [diff] [blame] | 1849 | int ret = 0; |
Konstantin Weitz | 41628d3 | 2012-04-25 15:30:38 +0200 | [diff] [blame] | 1850 | |
| 1851 | rcu_read_lock(); |
| 1852 | pid = rcu_dereference(target->pid); |
| 1853 | if (pid) |
Sam Bobroff | 27fbe64b | 2014-09-19 09:40:41 +1000 | [diff] [blame] | 1854 | task = get_pid_task(pid, PIDTYPE_PID); |
Konstantin Weitz | 41628d3 | 2012-04-25 15:30:38 +0200 | [diff] [blame] | 1855 | rcu_read_unlock(); |
| 1856 | if (!task) |
Raghavendra K T | c45c528 | 2013-01-22 13:09:24 +0530 | [diff] [blame] | 1857 | return ret; |
Raghavendra K T | c45c528 | 2013-01-22 13:09:24 +0530 | [diff] [blame] | 1858 | ret = yield_to(task, 1); |
Konstantin Weitz | 41628d3 | 2012-04-25 15:30:38 +0200 | [diff] [blame] | 1859 | put_task_struct(task); |
Raghavendra K T | c45c528 | 2013-01-22 13:09:24 +0530 | [diff] [blame] | 1860 | |
| 1861 | return ret; |
Konstantin Weitz | 41628d3 | 2012-04-25 15:30:38 +0200 | [diff] [blame] | 1862 | } |
| 1863 | EXPORT_SYMBOL_GPL(kvm_vcpu_yield_to); |
| 1864 | |
Raghavendra K T | 06e48c5 | 2012-07-19 15:17:52 +0530 | [diff] [blame] | 1865 | /* |
| 1866 | * Helper that checks whether a VCPU is eligible for directed yield. |
| 1867 | * Most eligible candidate to yield is decided by following heuristics: |
| 1868 | * |
| 1869 | * (a) VCPU which has not done pl-exit or cpu relax intercepted recently |
| 1870 | * (preempted lock holder), indicated by @in_spin_loop. |
| 1871 | * Set at the beiginning and cleared at the end of interception/PLE handler. |
| 1872 | * |
| 1873 | * (b) VCPU which has done pl-exit/ cpu relax intercepted but did not get |
| 1874 | * chance last time (mostly it has become eligible now since we have probably |
| 1875 | * yielded to lockholder in last iteration. This is done by toggling |
| 1876 | * @dy_eligible each time a VCPU checked for eligibility.) |
| 1877 | * |
| 1878 | * Yielding to a recently pl-exited/cpu relax intercepted VCPU before yielding |
| 1879 | * to preempted lock-holder could result in wrong VCPU selection and CPU |
| 1880 | * burning. Giving priority for a potential lock-holder increases lock |
| 1881 | * progress. |
| 1882 | * |
| 1883 | * Since algorithm is based on heuristics, accessing another VCPU data without |
| 1884 | * locking does not harm. It may result in trying to yield to same VCPU, fail |
| 1885 | * and continue with next VCPU and so on. |
| 1886 | */ |
Stephen Hemminger | 7940876 | 2013-12-29 12:12:29 -0800 | [diff] [blame] | 1887 | static bool kvm_vcpu_eligible_for_directed_yield(struct kvm_vcpu *vcpu) |
Raghavendra K T | 06e48c5 | 2012-07-19 15:17:52 +0530 | [diff] [blame] | 1888 | { |
Scott Wood | 4a55dd7 | 2014-01-09 18:43:16 -0600 | [diff] [blame] | 1889 | #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT |
Raghavendra K T | 06e48c5 | 2012-07-19 15:17:52 +0530 | [diff] [blame] | 1890 | bool eligible; |
| 1891 | |
| 1892 | eligible = !vcpu->spin_loop.in_spin_loop || |
Christian Borntraeger | 3465611 | 2014-09-04 21:13:31 +0200 | [diff] [blame] | 1893 | vcpu->spin_loop.dy_eligible; |
Raghavendra K T | 06e48c5 | 2012-07-19 15:17:52 +0530 | [diff] [blame] | 1894 | |
| 1895 | if (vcpu->spin_loop.in_spin_loop) |
| 1896 | kvm_vcpu_set_dy_eligible(vcpu, !vcpu->spin_loop.dy_eligible); |
| 1897 | |
| 1898 | return eligible; |
Scott Wood | 4a55dd7 | 2014-01-09 18:43:16 -0600 | [diff] [blame] | 1899 | #else |
| 1900 | return true; |
Raghavendra K T | 06e48c5 | 2012-07-19 15:17:52 +0530 | [diff] [blame] | 1901 | #endif |
Scott Wood | 4a55dd7 | 2014-01-09 18:43:16 -0600 | [diff] [blame] | 1902 | } |
Raghavendra K T | c45c528 | 2013-01-22 13:09:24 +0530 | [diff] [blame] | 1903 | |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 1904 | void kvm_vcpu_on_spin(struct kvm_vcpu *me) |
Zhai, Edwin | d255f4f | 2009-10-09 18:03:20 +0800 | [diff] [blame] | 1905 | { |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 1906 | struct kvm *kvm = me->kvm; |
| 1907 | struct kvm_vcpu *vcpu; |
| 1908 | int last_boosted_vcpu = me->kvm->last_boosted_vcpu; |
| 1909 | int yielded = 0; |
Raghavendra K T | c45c528 | 2013-01-22 13:09:24 +0530 | [diff] [blame] | 1910 | int try = 3; |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 1911 | int pass; |
| 1912 | int i; |
Zhai, Edwin | d255f4f | 2009-10-09 18:03:20 +0800 | [diff] [blame] | 1913 | |
Raghavendra K T | 4c08849 | 2012-07-18 19:07:46 +0530 | [diff] [blame] | 1914 | kvm_vcpu_set_in_spin_loop(me, true); |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 1915 | /* |
| 1916 | * We boost the priority of a VCPU that is runnable but not |
| 1917 | * currently running, because it got preempted by something |
| 1918 | * else and called schedule in __vcpu_run. Hopefully that |
| 1919 | * VCPU is holding the lock that we need and will release it. |
| 1920 | * We approximate round-robin by starting at the last boosted VCPU. |
| 1921 | */ |
Raghavendra K T | c45c528 | 2013-01-22 13:09:24 +0530 | [diff] [blame] | 1922 | for (pass = 0; pass < 2 && !yielded && try; pass++) { |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 1923 | kvm_for_each_vcpu(i, vcpu, kvm) { |
Rik van Riel | 5cfc2aa | 2012-06-19 16:51:04 -0400 | [diff] [blame] | 1924 | if (!pass && i <= last_boosted_vcpu) { |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 1925 | i = last_boosted_vcpu; |
| 1926 | continue; |
| 1927 | } else if (pass && i > last_boosted_vcpu) |
| 1928 | break; |
Raghavendra K T | 7bc7ae2 | 2013-03-04 23:32:27 +0530 | [diff] [blame] | 1929 | if (!ACCESS_ONCE(vcpu->preempted)) |
| 1930 | continue; |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 1931 | if (vcpu == me) |
| 1932 | continue; |
Michael Mueller | 98f4a14 | 2014-02-26 16:14:18 +0100 | [diff] [blame] | 1933 | if (waitqueue_active(&vcpu->wq) && !kvm_arch_vcpu_runnable(vcpu)) |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 1934 | continue; |
Raghavendra K T | 06e48c5 | 2012-07-19 15:17:52 +0530 | [diff] [blame] | 1935 | if (!kvm_vcpu_eligible_for_directed_yield(vcpu)) |
| 1936 | continue; |
Raghavendra K T | c45c528 | 2013-01-22 13:09:24 +0530 | [diff] [blame] | 1937 | |
| 1938 | yielded = kvm_vcpu_yield_to(vcpu); |
| 1939 | if (yielded > 0) { |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 1940 | kvm->last_boosted_vcpu = i; |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 1941 | break; |
Raghavendra K T | c45c528 | 2013-01-22 13:09:24 +0530 | [diff] [blame] | 1942 | } else if (yielded < 0) { |
| 1943 | try--; |
| 1944 | if (!try) |
| 1945 | break; |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 1946 | } |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 1947 | } |
| 1948 | } |
Raghavendra K T | 4c08849 | 2012-07-18 19:07:46 +0530 | [diff] [blame] | 1949 | kvm_vcpu_set_in_spin_loop(me, false); |
Raghavendra K T | 06e48c5 | 2012-07-19 15:17:52 +0530 | [diff] [blame] | 1950 | |
| 1951 | /* Ensure vcpu is not eligible during next spinloop */ |
| 1952 | kvm_vcpu_set_dy_eligible(me, false); |
Zhai, Edwin | d255f4f | 2009-10-09 18:03:20 +0800 | [diff] [blame] | 1953 | } |
| 1954 | EXPORT_SYMBOL_GPL(kvm_vcpu_on_spin); |
| 1955 | |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 1956 | 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] | 1957 | { |
| 1958 | struct kvm_vcpu *vcpu = vma->vm_file->private_data; |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 1959 | struct page *page; |
| 1960 | |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 1961 | if (vmf->pgoff == 0) |
Avi Kivity | 039576c | 2007-03-20 12:46:50 +0200 | [diff] [blame] | 1962 | page = virt_to_page(vcpu->run); |
Avi Kivity | 0956676 | 2008-01-23 18:14:23 +0200 | [diff] [blame] | 1963 | #ifdef CONFIG_X86 |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 1964 | else if (vmf->pgoff == KVM_PIO_PAGE_OFFSET) |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 1965 | page = virt_to_page(vcpu->arch.pio_data); |
Avi Kivity | 0956676 | 2008-01-23 18:14:23 +0200 | [diff] [blame] | 1966 | #endif |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 1967 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
| 1968 | else if (vmf->pgoff == KVM_COALESCED_MMIO_PAGE_OFFSET) |
| 1969 | page = virt_to_page(vcpu->kvm->coalesced_mmio_ring); |
| 1970 | #endif |
Avi Kivity | 039576c | 2007-03-20 12:46:50 +0200 | [diff] [blame] | 1971 | else |
Carsten Otte | 5b1c149 | 2012-01-04 10:25:23 +0100 | [diff] [blame] | 1972 | return kvm_arch_vcpu_fault(vcpu, vmf); |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 1973 | get_page(page); |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 1974 | vmf->page = page; |
| 1975 | return 0; |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 1976 | } |
| 1977 | |
Alexey Dobriyan | f0f37e2 | 2009-09-27 22:29:37 +0400 | [diff] [blame] | 1978 | static const struct vm_operations_struct kvm_vcpu_vm_ops = { |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 1979 | .fault = kvm_vcpu_fault, |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 1980 | }; |
| 1981 | |
| 1982 | static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma) |
| 1983 | { |
| 1984 | vma->vm_ops = &kvm_vcpu_vm_ops; |
| 1985 | return 0; |
| 1986 | } |
| 1987 | |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1988 | static int kvm_vcpu_release(struct inode *inode, struct file *filp) |
| 1989 | { |
| 1990 | struct kvm_vcpu *vcpu = filp->private_data; |
| 1991 | |
Al Viro | 66c0b39 | 2008-04-19 20:33:56 +0100 | [diff] [blame] | 1992 | kvm_put_kvm(vcpu->kvm); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1993 | return 0; |
| 1994 | } |
| 1995 | |
Christian Borntraeger | 3d3aab1 | 2008-12-02 11:17:32 +0100 | [diff] [blame] | 1996 | static struct file_operations kvm_vcpu_fops = { |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 1997 | .release = kvm_vcpu_release, |
| 1998 | .unlocked_ioctl = kvm_vcpu_ioctl, |
Christian Borntraeger | de8e5d7 | 2015-02-03 09:35:15 +0100 | [diff] [blame] | 1999 | #ifdef CONFIG_KVM_COMPAT |
Alexander Graf | 1dda606 | 2011-06-08 02:45:37 +0200 | [diff] [blame] | 2000 | .compat_ioctl = kvm_vcpu_compat_ioctl, |
| 2001 | #endif |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 2002 | .mmap = kvm_vcpu_mmap, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 2003 | .llseek = noop_llseek, |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2004 | }; |
| 2005 | |
| 2006 | /* |
| 2007 | * Allocates an inode for the vcpu. |
| 2008 | */ |
| 2009 | static int create_vcpu_fd(struct kvm_vcpu *vcpu) |
| 2010 | { |
Yann Droneaud | 24009b0 | 2013-08-24 22:14:07 +0200 | [diff] [blame] | 2011 | return anon_inode_getfd("kvm-vcpu", &kvm_vcpu_fops, vcpu, O_RDWR | O_CLOEXEC); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2012 | } |
| 2013 | |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 2014 | /* |
| 2015 | * Creates some virtual cpus. Good luck creating more than one. |
| 2016 | */ |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 2017 | static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, u32 id) |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 2018 | { |
| 2019 | int r; |
Gleb Natapov | 988a2ca | 2009-06-09 15:56:29 +0300 | [diff] [blame] | 2020 | struct kvm_vcpu *vcpu, *v; |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 2021 | |
Andy Honig | 338c7db | 2013-11-18 16:09:22 -0800 | [diff] [blame] | 2022 | if (id >= KVM_MAX_VCPUS) |
| 2023 | return -EINVAL; |
| 2024 | |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 2025 | vcpu = kvm_arch_vcpu_create(kvm, id); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2026 | if (IS_ERR(vcpu)) |
| 2027 | return PTR_ERR(vcpu); |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 2028 | |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 2029 | preempt_notifier_init(&vcpu->preempt_notifier, &kvm_preempt_ops); |
| 2030 | |
Avi Kivity | 26e5215 | 2007-11-20 15:30:24 +0200 | [diff] [blame] | 2031 | r = kvm_arch_vcpu_setup(vcpu); |
| 2032 | if (r) |
Jan Kiszka | d780592 | 2011-05-23 10:33:05 +0200 | [diff] [blame] | 2033 | goto vcpu_destroy; |
Avi Kivity | 26e5215 | 2007-11-20 15:30:24 +0200 | [diff] [blame] | 2034 | |
Shaohua Li | 11ec280 | 2007-07-23 14:51:37 +0800 | [diff] [blame] | 2035 | mutex_lock(&kvm->lock); |
Avi Kivity | 3e51570 | 2012-03-05 14:23:29 +0200 | [diff] [blame] | 2036 | if (!kvm_vcpu_compatible(vcpu)) { |
| 2037 | r = -EINVAL; |
| 2038 | goto unlock_vcpu_destroy; |
| 2039 | } |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 2040 | if (atomic_read(&kvm->online_vcpus) == KVM_MAX_VCPUS) { |
| 2041 | r = -EINVAL; |
Jan Kiszka | d780592 | 2011-05-23 10:33:05 +0200 | [diff] [blame] | 2042 | goto unlock_vcpu_destroy; |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2043 | } |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 2044 | |
Gleb Natapov | 988a2ca | 2009-06-09 15:56:29 +0300 | [diff] [blame] | 2045 | kvm_for_each_vcpu(r, v, kvm) |
| 2046 | if (v->vcpu_id == id) { |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 2047 | r = -EEXIST; |
Jan Kiszka | d780592 | 2011-05-23 10:33:05 +0200 | [diff] [blame] | 2048 | goto unlock_vcpu_destroy; |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 2049 | } |
| 2050 | |
| 2051 | BUG_ON(kvm->vcpus[atomic_read(&kvm->online_vcpus)]); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2052 | |
| 2053 | /* Now it's all set up, let userspace reach it */ |
Al Viro | 66c0b39 | 2008-04-19 20:33:56 +0100 | [diff] [blame] | 2054 | kvm_get_kvm(kvm); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2055 | r = create_vcpu_fd(vcpu); |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 2056 | if (r < 0) { |
| 2057 | kvm_put_kvm(kvm); |
Jan Kiszka | d780592 | 2011-05-23 10:33:05 +0200 | [diff] [blame] | 2058 | goto unlock_vcpu_destroy; |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 2059 | } |
| 2060 | |
| 2061 | kvm->vcpus[atomic_read(&kvm->online_vcpus)] = vcpu; |
| 2062 | smp_wmb(); |
| 2063 | atomic_inc(&kvm->online_vcpus); |
| 2064 | |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 2065 | mutex_unlock(&kvm->lock); |
Marcelo Tosatti | 42897d8 | 2012-11-27 23:29:02 -0200 | [diff] [blame] | 2066 | kvm_arch_vcpu_postcreate(vcpu); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2067 | return r; |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 2068 | |
Jan Kiszka | d780592 | 2011-05-23 10:33:05 +0200 | [diff] [blame] | 2069 | unlock_vcpu_destroy: |
Glauber Costa | 7d8fece | 2008-09-17 23:16:59 -0300 | [diff] [blame] | 2070 | mutex_unlock(&kvm->lock); |
Jan Kiszka | d780592 | 2011-05-23 10:33:05 +0200 | [diff] [blame] | 2071 | vcpu_destroy: |
Hollis Blanchard | d40ccc6 | 2007-11-19 14:04:43 -0600 | [diff] [blame] | 2072 | kvm_arch_vcpu_destroy(vcpu); |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 2073 | return r; |
| 2074 | } |
| 2075 | |
Avi Kivity | 1961d27 | 2007-03-05 19:46:05 +0200 | [diff] [blame] | 2076 | static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset) |
| 2077 | { |
| 2078 | if (sigset) { |
| 2079 | sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP)); |
| 2080 | vcpu->sigset_active = 1; |
| 2081 | vcpu->sigset = *sigset; |
| 2082 | } else |
| 2083 | vcpu->sigset_active = 0; |
| 2084 | return 0; |
| 2085 | } |
| 2086 | |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2087 | static long kvm_vcpu_ioctl(struct file *filp, |
| 2088 | unsigned int ioctl, unsigned long arg) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2089 | { |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2090 | struct kvm_vcpu *vcpu = filp->private_data; |
Al Viro | 2f366987 | 2007-02-09 16:38:35 +0000 | [diff] [blame] | 2091 | void __user *argp = (void __user *)arg; |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 2092 | int r; |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 2093 | struct kvm_fpu *fpu = NULL; |
| 2094 | struct kvm_sregs *kvm_sregs = NULL; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2095 | |
Avi Kivity | 6d4e4c4 | 2007-11-21 16:41:05 +0200 | [diff] [blame] | 2096 | if (vcpu->kvm->mm != current->mm) |
| 2097 | return -EIO; |
Avi Kivity | 2122ff5 | 2010-05-13 11:25:04 +0300 | [diff] [blame] | 2098 | |
David Matlack | 2ea75be | 2014-09-19 16:03:25 -0700 | [diff] [blame] | 2099 | if (unlikely(_IOC_TYPE(ioctl) != KVMIO)) |
| 2100 | return -EINVAL; |
| 2101 | |
Sanjay Lal | 2f4d9b5 | 2012-11-21 18:34:15 -0800 | [diff] [blame] | 2102 | #if defined(CONFIG_S390) || defined(CONFIG_PPC) || defined(CONFIG_MIPS) |
Avi Kivity | 2122ff5 | 2010-05-13 11:25:04 +0300 | [diff] [blame] | 2103 | /* |
| 2104 | * Special cases: vcpu ioctls that are asynchronous to vcpu execution, |
| 2105 | * so vcpu_load() would break it. |
| 2106 | */ |
Jens Freimann | 47b43c5 | 2014-11-11 20:57:06 +0100 | [diff] [blame] | 2107 | if (ioctl == KVM_S390_INTERRUPT || ioctl == KVM_S390_IRQ || ioctl == KVM_INTERRUPT) |
Avi Kivity | 2122ff5 | 2010-05-13 11:25:04 +0300 | [diff] [blame] | 2108 | return kvm_arch_vcpu_ioctl(filp, ioctl, arg); |
| 2109 | #endif |
| 2110 | |
| 2111 | |
Michael S. Tsirkin | 9fc7744 | 2012-09-16 11:50:30 +0300 | [diff] [blame] | 2112 | r = vcpu_load(vcpu); |
| 2113 | if (r) |
| 2114 | return r; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2115 | switch (ioctl) { |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 2116 | case KVM_RUN: |
Avi Kivity | f0fe510 | 2007-03-07 13:11:17 +0200 | [diff] [blame] | 2117 | r = -EINVAL; |
| 2118 | if (arg) |
| 2119 | goto out; |
Christian Borntraeger | 7a72f7a | 2014-08-05 16:44:14 +0200 | [diff] [blame] | 2120 | if (unlikely(vcpu->pid != current->pids[PIDTYPE_PID].pid)) { |
| 2121 | /* The thread running this VCPU changed. */ |
| 2122 | struct pid *oldpid = vcpu->pid; |
| 2123 | struct pid *newpid = get_task_pid(current, PIDTYPE_PID); |
Xiubo Li | f95ef0c | 2015-02-26 14:58:23 +0800 | [diff] [blame] | 2124 | |
Christian Borntraeger | 7a72f7a | 2014-08-05 16:44:14 +0200 | [diff] [blame] | 2125 | rcu_assign_pointer(vcpu->pid, newpid); |
| 2126 | if (oldpid) |
| 2127 | synchronize_rcu(); |
| 2128 | put_pid(oldpid); |
| 2129 | } |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 2130 | r = kvm_arch_vcpu_ioctl_run(vcpu, vcpu->run); |
Gleb Natapov | 64be500 | 2010-10-24 16:49:08 +0200 | [diff] [blame] | 2131 | trace_kvm_userspace_exit(vcpu->run->exit_reason, r); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2132 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2133 | case KVM_GET_REGS: { |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 2134 | struct kvm_regs *kvm_regs; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2135 | |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 2136 | r = -ENOMEM; |
| 2137 | kvm_regs = kzalloc(sizeof(struct kvm_regs), GFP_KERNEL); |
| 2138 | if (!kvm_regs) |
| 2139 | goto out; |
| 2140 | r = kvm_arch_vcpu_ioctl_get_regs(vcpu, kvm_regs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2141 | if (r) |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 2142 | goto out_free1; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2143 | r = -EFAULT; |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 2144 | if (copy_to_user(argp, kvm_regs, sizeof(struct kvm_regs))) |
| 2145 | goto out_free1; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2146 | r = 0; |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 2147 | out_free1: |
| 2148 | kfree(kvm_regs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2149 | break; |
| 2150 | } |
| 2151 | case KVM_SET_REGS: { |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 2152 | struct kvm_regs *kvm_regs; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2153 | |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 2154 | r = -ENOMEM; |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 2155 | kvm_regs = memdup_user(argp, sizeof(*kvm_regs)); |
| 2156 | if (IS_ERR(kvm_regs)) { |
| 2157 | r = PTR_ERR(kvm_regs); |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 2158 | goto out; |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 2159 | } |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 2160 | r = kvm_arch_vcpu_ioctl_set_regs(vcpu, kvm_regs); |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 2161 | kfree(kvm_regs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2162 | break; |
| 2163 | } |
| 2164 | case KVM_GET_SREGS: { |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 2165 | kvm_sregs = kzalloc(sizeof(struct kvm_sregs), GFP_KERNEL); |
| 2166 | r = -ENOMEM; |
| 2167 | if (!kvm_sregs) |
| 2168 | goto out; |
| 2169 | r = kvm_arch_vcpu_ioctl_get_sregs(vcpu, kvm_sregs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2170 | if (r) |
| 2171 | goto out; |
| 2172 | r = -EFAULT; |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 2173 | if (copy_to_user(argp, kvm_sregs, sizeof(struct kvm_sregs))) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2174 | goto out; |
| 2175 | r = 0; |
| 2176 | break; |
| 2177 | } |
| 2178 | case KVM_SET_SREGS: { |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 2179 | kvm_sregs = memdup_user(argp, sizeof(*kvm_sregs)); |
| 2180 | if (IS_ERR(kvm_sregs)) { |
| 2181 | r = PTR_ERR(kvm_sregs); |
Guo Chao | 1859541 | 2012-11-02 18:33:21 +0800 | [diff] [blame] | 2182 | kvm_sregs = NULL; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2183 | goto out; |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 2184 | } |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 2185 | r = kvm_arch_vcpu_ioctl_set_sregs(vcpu, kvm_sregs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2186 | break; |
| 2187 | } |
Marcelo Tosatti | 62d9f0d | 2008-04-11 13:24:45 -0300 | [diff] [blame] | 2188 | case KVM_GET_MP_STATE: { |
| 2189 | struct kvm_mp_state mp_state; |
| 2190 | |
| 2191 | r = kvm_arch_vcpu_ioctl_get_mpstate(vcpu, &mp_state); |
| 2192 | if (r) |
| 2193 | goto out; |
| 2194 | r = -EFAULT; |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2195 | if (copy_to_user(argp, &mp_state, sizeof(mp_state))) |
Marcelo Tosatti | 62d9f0d | 2008-04-11 13:24:45 -0300 | [diff] [blame] | 2196 | goto out; |
| 2197 | r = 0; |
| 2198 | break; |
| 2199 | } |
| 2200 | case KVM_SET_MP_STATE: { |
| 2201 | struct kvm_mp_state mp_state; |
| 2202 | |
| 2203 | r = -EFAULT; |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2204 | if (copy_from_user(&mp_state, argp, sizeof(mp_state))) |
Marcelo Tosatti | 62d9f0d | 2008-04-11 13:24:45 -0300 | [diff] [blame] | 2205 | goto out; |
| 2206 | r = kvm_arch_vcpu_ioctl_set_mpstate(vcpu, &mp_state); |
Marcelo Tosatti | 62d9f0d | 2008-04-11 13:24:45 -0300 | [diff] [blame] | 2207 | break; |
| 2208 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2209 | case KVM_TRANSLATE: { |
| 2210 | struct kvm_translation tr; |
| 2211 | |
| 2212 | r = -EFAULT; |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2213 | if (copy_from_user(&tr, argp, sizeof(tr))) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2214 | goto out; |
Zhang Xiantao | 8b00679 | 2007-11-16 13:05:55 +0800 | [diff] [blame] | 2215 | r = kvm_arch_vcpu_ioctl_translate(vcpu, &tr); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2216 | if (r) |
| 2217 | goto out; |
| 2218 | r = -EFAULT; |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2219 | if (copy_to_user(argp, &tr, sizeof(tr))) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2220 | goto out; |
| 2221 | r = 0; |
| 2222 | break; |
| 2223 | } |
Jan Kiszka | d0bfb94 | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 2224 | case KVM_SET_GUEST_DEBUG: { |
| 2225 | struct kvm_guest_debug dbg; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2226 | |
| 2227 | r = -EFAULT; |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2228 | if (copy_from_user(&dbg, argp, sizeof(dbg))) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2229 | goto out; |
Jan Kiszka | d0bfb94 | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 2230 | r = kvm_arch_vcpu_ioctl_set_guest_debug(vcpu, &dbg); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2231 | break; |
| 2232 | } |
Avi Kivity | 1961d27 | 2007-03-05 19:46:05 +0200 | [diff] [blame] | 2233 | case KVM_SET_SIGNAL_MASK: { |
| 2234 | struct kvm_signal_mask __user *sigmask_arg = argp; |
| 2235 | struct kvm_signal_mask kvm_sigmask; |
| 2236 | sigset_t sigset, *p; |
| 2237 | |
| 2238 | p = NULL; |
| 2239 | if (argp) { |
| 2240 | r = -EFAULT; |
| 2241 | if (copy_from_user(&kvm_sigmask, argp, |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2242 | sizeof(kvm_sigmask))) |
Avi Kivity | 1961d27 | 2007-03-05 19:46:05 +0200 | [diff] [blame] | 2243 | goto out; |
| 2244 | r = -EINVAL; |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2245 | if (kvm_sigmask.len != sizeof(sigset)) |
Avi Kivity | 1961d27 | 2007-03-05 19:46:05 +0200 | [diff] [blame] | 2246 | goto out; |
| 2247 | r = -EFAULT; |
| 2248 | if (copy_from_user(&sigset, sigmask_arg->sigset, |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2249 | sizeof(sigset))) |
Avi Kivity | 1961d27 | 2007-03-05 19:46:05 +0200 | [diff] [blame] | 2250 | goto out; |
| 2251 | p = &sigset; |
| 2252 | } |
Andi Kleen | 376d41f | 2010-06-10 13:10:47 +0200 | [diff] [blame] | 2253 | r = kvm_vcpu_ioctl_set_sigmask(vcpu, p); |
Avi Kivity | 1961d27 | 2007-03-05 19:46:05 +0200 | [diff] [blame] | 2254 | break; |
| 2255 | } |
Avi Kivity | b883673 | 2007-04-01 16:34:31 +0300 | [diff] [blame] | 2256 | case KVM_GET_FPU: { |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 2257 | fpu = kzalloc(sizeof(struct kvm_fpu), GFP_KERNEL); |
| 2258 | r = -ENOMEM; |
| 2259 | if (!fpu) |
| 2260 | goto out; |
| 2261 | r = kvm_arch_vcpu_ioctl_get_fpu(vcpu, fpu); |
Avi Kivity | b883673 | 2007-04-01 16:34:31 +0300 | [diff] [blame] | 2262 | if (r) |
| 2263 | goto out; |
| 2264 | r = -EFAULT; |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 2265 | if (copy_to_user(argp, fpu, sizeof(struct kvm_fpu))) |
Avi Kivity | b883673 | 2007-04-01 16:34:31 +0300 | [diff] [blame] | 2266 | goto out; |
| 2267 | r = 0; |
| 2268 | break; |
| 2269 | } |
| 2270 | case KVM_SET_FPU: { |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 2271 | fpu = memdup_user(argp, sizeof(*fpu)); |
| 2272 | if (IS_ERR(fpu)) { |
| 2273 | r = PTR_ERR(fpu); |
Guo Chao | 1859541 | 2012-11-02 18:33:21 +0800 | [diff] [blame] | 2274 | fpu = NULL; |
Avi Kivity | b883673 | 2007-04-01 16:34:31 +0300 | [diff] [blame] | 2275 | goto out; |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 2276 | } |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 2277 | r = kvm_arch_vcpu_ioctl_set_fpu(vcpu, fpu); |
Avi Kivity | b883673 | 2007-04-01 16:34:31 +0300 | [diff] [blame] | 2278 | break; |
| 2279 | } |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2280 | default: |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 2281 | r = kvm_arch_vcpu_ioctl(filp, ioctl, arg); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2282 | } |
| 2283 | out: |
Avi Kivity | 2122ff5 | 2010-05-13 11:25:04 +0300 | [diff] [blame] | 2284 | vcpu_put(vcpu); |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 2285 | kfree(fpu); |
| 2286 | kfree(kvm_sregs); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2287 | return r; |
| 2288 | } |
| 2289 | |
Christian Borntraeger | de8e5d7 | 2015-02-03 09:35:15 +0100 | [diff] [blame] | 2290 | #ifdef CONFIG_KVM_COMPAT |
Alexander Graf | 1dda606 | 2011-06-08 02:45:37 +0200 | [diff] [blame] | 2291 | static long kvm_vcpu_compat_ioctl(struct file *filp, |
| 2292 | unsigned int ioctl, unsigned long arg) |
| 2293 | { |
| 2294 | struct kvm_vcpu *vcpu = filp->private_data; |
| 2295 | void __user *argp = compat_ptr(arg); |
| 2296 | int r; |
| 2297 | |
| 2298 | if (vcpu->kvm->mm != current->mm) |
| 2299 | return -EIO; |
| 2300 | |
| 2301 | switch (ioctl) { |
| 2302 | case KVM_SET_SIGNAL_MASK: { |
| 2303 | struct kvm_signal_mask __user *sigmask_arg = argp; |
| 2304 | struct kvm_signal_mask kvm_sigmask; |
| 2305 | compat_sigset_t csigset; |
| 2306 | sigset_t sigset; |
| 2307 | |
| 2308 | if (argp) { |
| 2309 | r = -EFAULT; |
| 2310 | if (copy_from_user(&kvm_sigmask, argp, |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2311 | sizeof(kvm_sigmask))) |
Alexander Graf | 1dda606 | 2011-06-08 02:45:37 +0200 | [diff] [blame] | 2312 | goto out; |
| 2313 | r = -EINVAL; |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2314 | if (kvm_sigmask.len != sizeof(csigset)) |
Alexander Graf | 1dda606 | 2011-06-08 02:45:37 +0200 | [diff] [blame] | 2315 | goto out; |
| 2316 | r = -EFAULT; |
| 2317 | if (copy_from_user(&csigset, sigmask_arg->sigset, |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2318 | sizeof(csigset))) |
Alexander Graf | 1dda606 | 2011-06-08 02:45:37 +0200 | [diff] [blame] | 2319 | goto out; |
Alan Cox | 760a9a3 | 2012-08-22 14:34:11 +0100 | [diff] [blame] | 2320 | sigset_from_compat(&sigset, &csigset); |
| 2321 | r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset); |
| 2322 | } else |
| 2323 | r = kvm_vcpu_ioctl_set_sigmask(vcpu, NULL); |
Alexander Graf | 1dda606 | 2011-06-08 02:45:37 +0200 | [diff] [blame] | 2324 | break; |
| 2325 | } |
| 2326 | default: |
| 2327 | r = kvm_vcpu_ioctl(filp, ioctl, arg); |
| 2328 | } |
| 2329 | |
| 2330 | out: |
| 2331 | return r; |
| 2332 | } |
| 2333 | #endif |
| 2334 | |
Scott Wood | 852b6d5 | 2013-04-12 14:08:42 +0000 | [diff] [blame] | 2335 | static int kvm_device_ioctl_attr(struct kvm_device *dev, |
| 2336 | int (*accessor)(struct kvm_device *dev, |
| 2337 | struct kvm_device_attr *attr), |
| 2338 | unsigned long arg) |
| 2339 | { |
| 2340 | struct kvm_device_attr attr; |
| 2341 | |
| 2342 | if (!accessor) |
| 2343 | return -EPERM; |
| 2344 | |
| 2345 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) |
| 2346 | return -EFAULT; |
| 2347 | |
| 2348 | return accessor(dev, &attr); |
| 2349 | } |
| 2350 | |
| 2351 | static long kvm_device_ioctl(struct file *filp, unsigned int ioctl, |
| 2352 | unsigned long arg) |
| 2353 | { |
| 2354 | struct kvm_device *dev = filp->private_data; |
| 2355 | |
| 2356 | switch (ioctl) { |
| 2357 | case KVM_SET_DEVICE_ATTR: |
| 2358 | return kvm_device_ioctl_attr(dev, dev->ops->set_attr, arg); |
| 2359 | case KVM_GET_DEVICE_ATTR: |
| 2360 | return kvm_device_ioctl_attr(dev, dev->ops->get_attr, arg); |
| 2361 | case KVM_HAS_DEVICE_ATTR: |
| 2362 | return kvm_device_ioctl_attr(dev, dev->ops->has_attr, arg); |
| 2363 | default: |
| 2364 | if (dev->ops->ioctl) |
| 2365 | return dev->ops->ioctl(dev, ioctl, arg); |
| 2366 | |
| 2367 | return -ENOTTY; |
| 2368 | } |
| 2369 | } |
| 2370 | |
Scott Wood | 852b6d5 | 2013-04-12 14:08:42 +0000 | [diff] [blame] | 2371 | static int kvm_device_release(struct inode *inode, struct file *filp) |
| 2372 | { |
| 2373 | struct kvm_device *dev = filp->private_data; |
| 2374 | struct kvm *kvm = dev->kvm; |
| 2375 | |
Scott Wood | 852b6d5 | 2013-04-12 14:08:42 +0000 | [diff] [blame] | 2376 | kvm_put_kvm(kvm); |
| 2377 | return 0; |
| 2378 | } |
| 2379 | |
| 2380 | static const struct file_operations kvm_device_fops = { |
| 2381 | .unlocked_ioctl = kvm_device_ioctl, |
Christian Borntraeger | de8e5d7 | 2015-02-03 09:35:15 +0100 | [diff] [blame] | 2382 | #ifdef CONFIG_KVM_COMPAT |
Scott Wood | db6ae61 | 2013-04-30 20:00:45 -0500 | [diff] [blame] | 2383 | .compat_ioctl = kvm_device_ioctl, |
| 2384 | #endif |
Scott Wood | 852b6d5 | 2013-04-12 14:08:42 +0000 | [diff] [blame] | 2385 | .release = kvm_device_release, |
| 2386 | }; |
| 2387 | |
| 2388 | struct kvm_device *kvm_device_from_filp(struct file *filp) |
| 2389 | { |
| 2390 | if (filp->f_op != &kvm_device_fops) |
| 2391 | return NULL; |
| 2392 | |
| 2393 | return filp->private_data; |
| 2394 | } |
| 2395 | |
Will Deacon | d60eacb | 2014-09-02 10:27:33 +0100 | [diff] [blame] | 2396 | static struct kvm_device_ops *kvm_device_ops_table[KVM_DEV_TYPE_MAX] = { |
| 2397 | #ifdef CONFIG_KVM_MPIC |
| 2398 | [KVM_DEV_TYPE_FSL_MPIC_20] = &kvm_mpic_ops, |
| 2399 | [KVM_DEV_TYPE_FSL_MPIC_42] = &kvm_mpic_ops, |
| 2400 | #endif |
| 2401 | |
| 2402 | #ifdef CONFIG_KVM_XICS |
| 2403 | [KVM_DEV_TYPE_XICS] = &kvm_xics_ops, |
| 2404 | #endif |
Will Deacon | d60eacb | 2014-09-02 10:27:33 +0100 | [diff] [blame] | 2405 | }; |
| 2406 | |
| 2407 | int kvm_register_device_ops(struct kvm_device_ops *ops, u32 type) |
| 2408 | { |
| 2409 | if (type >= ARRAY_SIZE(kvm_device_ops_table)) |
| 2410 | return -ENOSPC; |
| 2411 | |
| 2412 | if (kvm_device_ops_table[type] != NULL) |
| 2413 | return -EEXIST; |
| 2414 | |
| 2415 | kvm_device_ops_table[type] = ops; |
| 2416 | return 0; |
| 2417 | } |
| 2418 | |
Wanpeng Li | 571ee1b | 2014-10-09 18:30:08 +0800 | [diff] [blame] | 2419 | void kvm_unregister_device_ops(u32 type) |
| 2420 | { |
| 2421 | if (kvm_device_ops_table[type] != NULL) |
| 2422 | kvm_device_ops_table[type] = NULL; |
| 2423 | } |
| 2424 | |
Scott Wood | 852b6d5 | 2013-04-12 14:08:42 +0000 | [diff] [blame] | 2425 | static int kvm_ioctl_create_device(struct kvm *kvm, |
| 2426 | struct kvm_create_device *cd) |
| 2427 | { |
| 2428 | struct kvm_device_ops *ops = NULL; |
| 2429 | struct kvm_device *dev; |
| 2430 | bool test = cd->flags & KVM_CREATE_DEVICE_TEST; |
| 2431 | int ret; |
| 2432 | |
Will Deacon | d60eacb | 2014-09-02 10:27:33 +0100 | [diff] [blame] | 2433 | if (cd->type >= ARRAY_SIZE(kvm_device_ops_table)) |
Scott Wood | 852b6d5 | 2013-04-12 14:08:42 +0000 | [diff] [blame] | 2434 | return -ENODEV; |
Will Deacon | d60eacb | 2014-09-02 10:27:33 +0100 | [diff] [blame] | 2435 | |
| 2436 | ops = kvm_device_ops_table[cd->type]; |
| 2437 | if (ops == NULL) |
| 2438 | return -ENODEV; |
Scott Wood | 852b6d5 | 2013-04-12 14:08:42 +0000 | [diff] [blame] | 2439 | |
| 2440 | if (test) |
| 2441 | return 0; |
| 2442 | |
| 2443 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
| 2444 | if (!dev) |
| 2445 | return -ENOMEM; |
| 2446 | |
| 2447 | dev->ops = ops; |
| 2448 | dev->kvm = kvm; |
Scott Wood | 852b6d5 | 2013-04-12 14:08:42 +0000 | [diff] [blame] | 2449 | |
| 2450 | ret = ops->create(dev, cd->type); |
| 2451 | if (ret < 0) { |
| 2452 | kfree(dev); |
| 2453 | return ret; |
| 2454 | } |
| 2455 | |
Yann Droneaud | 24009b0 | 2013-08-24 22:14:07 +0200 | [diff] [blame] | 2456 | ret = anon_inode_getfd(ops->name, &kvm_device_fops, dev, O_RDWR | O_CLOEXEC); |
Scott Wood | 852b6d5 | 2013-04-12 14:08:42 +0000 | [diff] [blame] | 2457 | if (ret < 0) { |
| 2458 | ops->destroy(dev); |
| 2459 | return ret; |
| 2460 | } |
| 2461 | |
Scott Wood | 07f0a7b | 2013-04-25 14:11:23 +0000 | [diff] [blame] | 2462 | list_add(&dev->vm_node, &kvm->devices); |
Scott Wood | 852b6d5 | 2013-04-12 14:08:42 +0000 | [diff] [blame] | 2463 | kvm_get_kvm(kvm); |
| 2464 | cd->fd = ret; |
| 2465 | return 0; |
| 2466 | } |
| 2467 | |
Alexander Graf | 92b591a | 2014-07-14 18:33:08 +0200 | [diff] [blame] | 2468 | static long kvm_vm_ioctl_check_extension_generic(struct kvm *kvm, long arg) |
| 2469 | { |
| 2470 | switch (arg) { |
| 2471 | case KVM_CAP_USER_MEMORY: |
| 2472 | case KVM_CAP_DESTROY_MEMORY_REGION_WORKS: |
| 2473 | case KVM_CAP_JOIN_MEMORY_REGIONS_WORKS: |
| 2474 | #ifdef CONFIG_KVM_APIC_ARCHITECTURE |
| 2475 | case KVM_CAP_SET_BOOT_CPU_ID: |
| 2476 | #endif |
| 2477 | case KVM_CAP_INTERNAL_ERROR_DATA: |
| 2478 | #ifdef CONFIG_HAVE_KVM_MSI |
| 2479 | case KVM_CAP_SIGNAL_MSI: |
| 2480 | #endif |
Paul Mackerras | 297e210 | 2014-06-30 20:51:13 +1000 | [diff] [blame] | 2481 | #ifdef CONFIG_HAVE_KVM_IRQFD |
Paolo Bonzini | dc9be0f | 2015-03-05 11:54:46 +0100 | [diff] [blame] | 2482 | case KVM_CAP_IRQFD: |
Alexander Graf | 92b591a | 2014-07-14 18:33:08 +0200 | [diff] [blame] | 2483 | case KVM_CAP_IRQFD_RESAMPLE: |
| 2484 | #endif |
| 2485 | case KVM_CAP_CHECK_EXTENSION_VM: |
| 2486 | return 1; |
| 2487 | #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING |
| 2488 | case KVM_CAP_IRQ_ROUTING: |
| 2489 | return KVM_MAX_IRQ_ROUTES; |
| 2490 | #endif |
| 2491 | default: |
| 2492 | break; |
| 2493 | } |
| 2494 | return kvm_vm_ioctl_check_extension(kvm, arg); |
| 2495 | } |
| 2496 | |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2497 | static long kvm_vm_ioctl(struct file *filp, |
| 2498 | unsigned int ioctl, unsigned long arg) |
| 2499 | { |
| 2500 | struct kvm *kvm = filp->private_data; |
| 2501 | void __user *argp = (void __user *)arg; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2502 | int r; |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2503 | |
Avi Kivity | 6d4e4c4 | 2007-11-21 16:41:05 +0200 | [diff] [blame] | 2504 | if (kvm->mm != current->mm) |
| 2505 | return -EIO; |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2506 | switch (ioctl) { |
| 2507 | case KVM_CREATE_VCPU: |
| 2508 | r = kvm_vm_ioctl_create_vcpu(kvm, arg); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2509 | break; |
Izik Eidus | 6fc138d | 2007-10-09 19:20:39 +0200 | [diff] [blame] | 2510 | case KVM_SET_USER_MEMORY_REGION: { |
| 2511 | struct kvm_userspace_memory_region kvm_userspace_mem; |
| 2512 | |
| 2513 | r = -EFAULT; |
| 2514 | if (copy_from_user(&kvm_userspace_mem, argp, |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2515 | sizeof(kvm_userspace_mem))) |
Izik Eidus | 6fc138d | 2007-10-09 19:20:39 +0200 | [diff] [blame] | 2516 | goto out; |
| 2517 | |
Takuya Yoshikawa | 47ae31e | 2013-02-27 19:43:00 +0900 | [diff] [blame] | 2518 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2519 | break; |
| 2520 | } |
| 2521 | case KVM_GET_DIRTY_LOG: { |
| 2522 | struct kvm_dirty_log log; |
| 2523 | |
| 2524 | r = -EFAULT; |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2525 | if (copy_from_user(&log, argp, sizeof(log))) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2526 | goto out; |
Avi Kivity | 2c6f5df | 2007-02-20 18:27:58 +0200 | [diff] [blame] | 2527 | r = kvm_vm_ioctl_get_dirty_log(kvm, &log); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2528 | break; |
| 2529 | } |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2530 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
| 2531 | case KVM_REGISTER_COALESCED_MMIO: { |
| 2532 | struct kvm_coalesced_mmio_zone zone; |
Xiubo Li | f95ef0c | 2015-02-26 14:58:23 +0800 | [diff] [blame] | 2533 | |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2534 | r = -EFAULT; |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2535 | if (copy_from_user(&zone, argp, sizeof(zone))) |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2536 | goto out; |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2537 | r = kvm_vm_ioctl_register_coalesced_mmio(kvm, &zone); |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2538 | break; |
| 2539 | } |
| 2540 | case KVM_UNREGISTER_COALESCED_MMIO: { |
| 2541 | struct kvm_coalesced_mmio_zone zone; |
Xiubo Li | f95ef0c | 2015-02-26 14:58:23 +0800 | [diff] [blame] | 2542 | |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2543 | r = -EFAULT; |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2544 | if (copy_from_user(&zone, argp, sizeof(zone))) |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2545 | goto out; |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2546 | r = kvm_vm_ioctl_unregister_coalesced_mmio(kvm, &zone); |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2547 | break; |
| 2548 | } |
| 2549 | #endif |
Gregory Haskins | 721eecbf | 2009-05-20 10:30:49 -0400 | [diff] [blame] | 2550 | case KVM_IRQFD: { |
| 2551 | struct kvm_irqfd data; |
| 2552 | |
| 2553 | r = -EFAULT; |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2554 | if (copy_from_user(&data, argp, sizeof(data))) |
Gregory Haskins | 721eecbf | 2009-05-20 10:30:49 -0400 | [diff] [blame] | 2555 | goto out; |
Alex Williamson | d4db293 | 2012-06-29 09:56:08 -0600 | [diff] [blame] | 2556 | r = kvm_irqfd(kvm, &data); |
Gregory Haskins | 721eecbf | 2009-05-20 10:30:49 -0400 | [diff] [blame] | 2557 | break; |
| 2558 | } |
Gregory Haskins | d34e6b1 | 2009-07-07 17:08:49 -0400 | [diff] [blame] | 2559 | case KVM_IOEVENTFD: { |
| 2560 | struct kvm_ioeventfd data; |
| 2561 | |
| 2562 | r = -EFAULT; |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2563 | if (copy_from_user(&data, argp, sizeof(data))) |
Gregory Haskins | d34e6b1 | 2009-07-07 17:08:49 -0400 | [diff] [blame] | 2564 | goto out; |
| 2565 | r = kvm_ioeventfd(kvm, &data); |
| 2566 | break; |
| 2567 | } |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 2568 | #ifdef CONFIG_KVM_APIC_ARCHITECTURE |
| 2569 | case KVM_SET_BOOT_CPU_ID: |
| 2570 | r = 0; |
Marcelo Tosatti | 894a9c5 | 2009-06-23 15:05:14 -0300 | [diff] [blame] | 2571 | mutex_lock(&kvm->lock); |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 2572 | if (atomic_read(&kvm->online_vcpus) != 0) |
| 2573 | r = -EBUSY; |
| 2574 | else |
| 2575 | kvm->bsp_vcpu_id = arg; |
Marcelo Tosatti | 894a9c5 | 2009-06-23 15:05:14 -0300 | [diff] [blame] | 2576 | mutex_unlock(&kvm->lock); |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 2577 | break; |
| 2578 | #endif |
Jan Kiszka | 07975ad | 2012-03-29 21:14:12 +0200 | [diff] [blame] | 2579 | #ifdef CONFIG_HAVE_KVM_MSI |
| 2580 | case KVM_SIGNAL_MSI: { |
| 2581 | struct kvm_msi msi; |
| 2582 | |
| 2583 | r = -EFAULT; |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2584 | if (copy_from_user(&msi, argp, sizeof(msi))) |
Jan Kiszka | 07975ad | 2012-03-29 21:14:12 +0200 | [diff] [blame] | 2585 | goto out; |
| 2586 | r = kvm_send_userspace_msi(kvm, &msi); |
| 2587 | break; |
| 2588 | } |
| 2589 | #endif |
Christoffer Dall | 23d43cf | 2012-07-24 08:51:20 -0400 | [diff] [blame] | 2590 | #ifdef __KVM_HAVE_IRQ_LINE |
| 2591 | case KVM_IRQ_LINE_STATUS: |
| 2592 | case KVM_IRQ_LINE: { |
| 2593 | struct kvm_irq_level irq_event; |
| 2594 | |
| 2595 | r = -EFAULT; |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2596 | if (copy_from_user(&irq_event, argp, sizeof(irq_event))) |
Christoffer Dall | 23d43cf | 2012-07-24 08:51:20 -0400 | [diff] [blame] | 2597 | goto out; |
| 2598 | |
Yang Zhang | aa2fbe6 | 2013-04-11 19:21:40 +0800 | [diff] [blame] | 2599 | r = kvm_vm_ioctl_irq_line(kvm, &irq_event, |
| 2600 | ioctl == KVM_IRQ_LINE_STATUS); |
Christoffer Dall | 23d43cf | 2012-07-24 08:51:20 -0400 | [diff] [blame] | 2601 | if (r) |
| 2602 | goto out; |
| 2603 | |
| 2604 | r = -EFAULT; |
| 2605 | if (ioctl == KVM_IRQ_LINE_STATUS) { |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2606 | if (copy_to_user(argp, &irq_event, sizeof(irq_event))) |
Christoffer Dall | 23d43cf | 2012-07-24 08:51:20 -0400 | [diff] [blame] | 2607 | goto out; |
| 2608 | } |
| 2609 | |
| 2610 | r = 0; |
| 2611 | break; |
| 2612 | } |
| 2613 | #endif |
Alexander Graf | aa8d594 | 2013-04-15 21:12:53 +0200 | [diff] [blame] | 2614 | #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING |
| 2615 | case KVM_SET_GSI_ROUTING: { |
| 2616 | struct kvm_irq_routing routing; |
| 2617 | struct kvm_irq_routing __user *urouting; |
| 2618 | struct kvm_irq_routing_entry *entries; |
| 2619 | |
| 2620 | r = -EFAULT; |
| 2621 | if (copy_from_user(&routing, argp, sizeof(routing))) |
| 2622 | goto out; |
| 2623 | r = -EINVAL; |
| 2624 | if (routing.nr >= KVM_MAX_IRQ_ROUTES) |
| 2625 | goto out; |
| 2626 | if (routing.flags) |
| 2627 | goto out; |
| 2628 | r = -ENOMEM; |
| 2629 | entries = vmalloc(routing.nr * sizeof(*entries)); |
| 2630 | if (!entries) |
| 2631 | goto out; |
| 2632 | r = -EFAULT; |
| 2633 | urouting = argp; |
| 2634 | if (copy_from_user(entries, urouting->entries, |
| 2635 | routing.nr * sizeof(*entries))) |
| 2636 | goto out_free_irq_routing; |
| 2637 | r = kvm_set_irq_routing(kvm, entries, routing.nr, |
| 2638 | routing.flags); |
Xiubo Li | a642a17 | 2015-02-26 14:58:20 +0800 | [diff] [blame] | 2639 | out_free_irq_routing: |
Alexander Graf | aa8d594 | 2013-04-15 21:12:53 +0200 | [diff] [blame] | 2640 | vfree(entries); |
| 2641 | break; |
| 2642 | } |
| 2643 | #endif /* CONFIG_HAVE_KVM_IRQ_ROUTING */ |
Scott Wood | 852b6d5 | 2013-04-12 14:08:42 +0000 | [diff] [blame] | 2644 | case KVM_CREATE_DEVICE: { |
| 2645 | struct kvm_create_device cd; |
| 2646 | |
| 2647 | r = -EFAULT; |
| 2648 | if (copy_from_user(&cd, argp, sizeof(cd))) |
| 2649 | goto out; |
| 2650 | |
| 2651 | r = kvm_ioctl_create_device(kvm, &cd); |
| 2652 | if (r) |
| 2653 | goto out; |
| 2654 | |
| 2655 | r = -EFAULT; |
| 2656 | if (copy_to_user(argp, &cd, sizeof(cd))) |
| 2657 | goto out; |
| 2658 | |
| 2659 | r = 0; |
| 2660 | break; |
| 2661 | } |
Alexander Graf | 92b591a | 2014-07-14 18:33:08 +0200 | [diff] [blame] | 2662 | case KVM_CHECK_EXTENSION: |
| 2663 | r = kvm_vm_ioctl_check_extension_generic(kvm, arg); |
| 2664 | break; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2665 | default: |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2666 | r = kvm_arch_vm_ioctl(filp, ioctl, arg); |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2667 | } |
| 2668 | out: |
| 2669 | return r; |
| 2670 | } |
| 2671 | |
Christian Borntraeger | de8e5d7 | 2015-02-03 09:35:15 +0100 | [diff] [blame] | 2672 | #ifdef CONFIG_KVM_COMPAT |
Arnd Bergmann | 6ff5894 | 2009-10-22 14:19:27 +0200 | [diff] [blame] | 2673 | struct compat_kvm_dirty_log { |
| 2674 | __u32 slot; |
| 2675 | __u32 padding1; |
| 2676 | union { |
| 2677 | compat_uptr_t dirty_bitmap; /* one bit per page */ |
| 2678 | __u64 padding2; |
| 2679 | }; |
| 2680 | }; |
| 2681 | |
| 2682 | static long kvm_vm_compat_ioctl(struct file *filp, |
| 2683 | unsigned int ioctl, unsigned long arg) |
| 2684 | { |
| 2685 | struct kvm *kvm = filp->private_data; |
| 2686 | int r; |
| 2687 | |
| 2688 | if (kvm->mm != current->mm) |
| 2689 | return -EIO; |
| 2690 | switch (ioctl) { |
| 2691 | case KVM_GET_DIRTY_LOG: { |
| 2692 | struct compat_kvm_dirty_log compat_log; |
| 2693 | struct kvm_dirty_log log; |
| 2694 | |
| 2695 | r = -EFAULT; |
| 2696 | if (copy_from_user(&compat_log, (void __user *)arg, |
| 2697 | sizeof(compat_log))) |
| 2698 | goto out; |
| 2699 | log.slot = compat_log.slot; |
| 2700 | log.padding1 = compat_log.padding1; |
| 2701 | log.padding2 = compat_log.padding2; |
| 2702 | log.dirty_bitmap = compat_ptr(compat_log.dirty_bitmap); |
| 2703 | |
| 2704 | r = kvm_vm_ioctl_get_dirty_log(kvm, &log); |
Arnd Bergmann | 6ff5894 | 2009-10-22 14:19:27 +0200 | [diff] [blame] | 2705 | break; |
| 2706 | } |
| 2707 | default: |
| 2708 | r = kvm_vm_ioctl(filp, ioctl, arg); |
| 2709 | } |
| 2710 | |
| 2711 | out: |
| 2712 | return r; |
| 2713 | } |
| 2714 | #endif |
| 2715 | |
Christian Borntraeger | 3d3aab1 | 2008-12-02 11:17:32 +0100 | [diff] [blame] | 2716 | static struct file_operations kvm_vm_fops = { |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2717 | .release = kvm_vm_release, |
| 2718 | .unlocked_ioctl = kvm_vm_ioctl, |
Christian Borntraeger | de8e5d7 | 2015-02-03 09:35:15 +0100 | [diff] [blame] | 2719 | #ifdef CONFIG_KVM_COMPAT |
Arnd Bergmann | 6ff5894 | 2009-10-22 14:19:27 +0200 | [diff] [blame] | 2720 | .compat_ioctl = kvm_vm_compat_ioctl, |
| 2721 | #endif |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 2722 | .llseek = noop_llseek, |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2723 | }; |
| 2724 | |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 2725 | static int kvm_dev_ioctl_create_vm(unsigned long type) |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2726 | { |
Heiko Carstens | aac8763 | 2010-10-27 17:22:10 +0200 | [diff] [blame] | 2727 | int r; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2728 | struct kvm *kvm; |
| 2729 | |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 2730 | kvm = kvm_create_vm(type); |
Avi Kivity | d6d2816 | 2007-06-28 08:38:16 -0400 | [diff] [blame] | 2731 | if (IS_ERR(kvm)) |
| 2732 | return PTR_ERR(kvm); |
Takuya Yoshikawa | 6ce5a09 | 2010-03-15 22:13:30 +0900 | [diff] [blame] | 2733 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
| 2734 | r = kvm_coalesced_mmio_init(kvm); |
| 2735 | if (r < 0) { |
| 2736 | kvm_put_kvm(kvm); |
| 2737 | return r; |
| 2738 | } |
| 2739 | #endif |
Yann Droneaud | 24009b0 | 2013-08-24 22:14:07 +0200 | [diff] [blame] | 2740 | r = anon_inode_getfd("kvm-vm", &kvm_vm_fops, kvm, O_RDWR | O_CLOEXEC); |
Heiko Carstens | aac8763 | 2010-10-27 17:22:10 +0200 | [diff] [blame] | 2741 | if (r < 0) |
Al Viro | 66c0b39 | 2008-04-19 20:33:56 +0100 | [diff] [blame] | 2742 | kvm_put_kvm(kvm); |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2743 | |
Heiko Carstens | aac8763 | 2010-10-27 17:22:10 +0200 | [diff] [blame] | 2744 | return r; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2745 | } |
| 2746 | |
| 2747 | static long kvm_dev_ioctl(struct file *filp, |
| 2748 | unsigned int ioctl, unsigned long arg) |
| 2749 | { |
Avi Kivity | 07c45a3 | 2007-03-07 13:05:38 +0200 | [diff] [blame] | 2750 | long r = -EINVAL; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2751 | |
| 2752 | switch (ioctl) { |
| 2753 | case KVM_GET_API_VERSION: |
Avi Kivity | f0fe510 | 2007-03-07 13:11:17 +0200 | [diff] [blame] | 2754 | if (arg) |
| 2755 | goto out; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2756 | r = KVM_API_VERSION; |
| 2757 | break; |
| 2758 | case KVM_CREATE_VM: |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 2759 | r = kvm_dev_ioctl_create_vm(arg); |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2760 | break; |
Zhang Xiantao | 018d00d | 2007-11-15 23:07:47 +0800 | [diff] [blame] | 2761 | case KVM_CHECK_EXTENSION: |
Alexander Graf | 784aa3d | 2014-07-14 18:27:35 +0200 | [diff] [blame] | 2762 | r = kvm_vm_ioctl_check_extension_generic(NULL, arg); |
Avi Kivity | 5d308f4 | 2007-03-01 17:56:20 +0200 | [diff] [blame] | 2763 | break; |
Avi Kivity | 07c45a3 | 2007-03-07 13:05:38 +0200 | [diff] [blame] | 2764 | case KVM_GET_VCPU_MMAP_SIZE: |
Avi Kivity | 07c45a3 | 2007-03-07 13:05:38 +0200 | [diff] [blame] | 2765 | if (arg) |
| 2766 | goto out; |
Avi Kivity | adb1ff4 | 2008-01-24 15:13:08 +0200 | [diff] [blame] | 2767 | r = PAGE_SIZE; /* struct kvm_run */ |
| 2768 | #ifdef CONFIG_X86 |
| 2769 | r += PAGE_SIZE; /* pio data page */ |
| 2770 | #endif |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2771 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
| 2772 | r += PAGE_SIZE; /* coalesced mmio ring page */ |
| 2773 | #endif |
Avi Kivity | 07c45a3 | 2007-03-07 13:05:38 +0200 | [diff] [blame] | 2774 | break; |
Feng(Eric) Liu | d4c9ff2 | 2008-04-10 08:47:53 -0400 | [diff] [blame] | 2775 | case KVM_TRACE_ENABLE: |
| 2776 | case KVM_TRACE_PAUSE: |
| 2777 | case KVM_TRACE_DISABLE: |
Marcelo Tosatti | 2023a29 | 2009-06-18 11:47:28 -0300 | [diff] [blame] | 2778 | r = -EOPNOTSUPP; |
Feng(Eric) Liu | d4c9ff2 | 2008-04-10 08:47:53 -0400 | [diff] [blame] | 2779 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2780 | default: |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 2781 | return kvm_arch_dev_ioctl(filp, ioctl, arg); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2782 | } |
| 2783 | out: |
| 2784 | return r; |
| 2785 | } |
| 2786 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2787 | static struct file_operations kvm_chardev_ops = { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2788 | .unlocked_ioctl = kvm_dev_ioctl, |
| 2789 | .compat_ioctl = kvm_dev_ioctl, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 2790 | .llseek = noop_llseek, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2791 | }; |
| 2792 | |
| 2793 | static struct miscdevice kvm_dev = { |
Avi Kivity | bbe4432 | 2007-03-04 13:27:36 +0200 | [diff] [blame] | 2794 | KVM_MINOR, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2795 | "kvm", |
| 2796 | &kvm_chardev_ops, |
| 2797 | }; |
| 2798 | |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2799 | static void hardware_enable_nolock(void *junk) |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 2800 | { |
| 2801 | int cpu = raw_smp_processor_id(); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2802 | int r; |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 2803 | |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 2804 | if (cpumask_test_cpu(cpu, cpus_hardware_enabled)) |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 2805 | return; |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2806 | |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 2807 | cpumask_set_cpu(cpu, cpus_hardware_enabled); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2808 | |
Radim Krčmář | 13a34e0 | 2014-08-28 15:13:03 +0200 | [diff] [blame] | 2809 | r = kvm_arch_hardware_enable(); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2810 | |
| 2811 | if (r) { |
| 2812 | cpumask_clear_cpu(cpu, cpus_hardware_enabled); |
| 2813 | atomic_inc(&hardware_enable_failed); |
Xiubo Li | 1170adc | 2015-02-26 14:58:26 +0800 | [diff] [blame] | 2814 | pr_info("kvm: enabling virtualization on CPU%d failed\n", cpu); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2815 | } |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 2816 | } |
| 2817 | |
Paolo Bonzini | 4fa92fb | 2013-09-10 12:57:17 +0200 | [diff] [blame] | 2818 | static void hardware_enable(void) |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2819 | { |
Paolo Bonzini | 4a937f9 | 2013-09-10 12:58:35 +0200 | [diff] [blame] | 2820 | raw_spin_lock(&kvm_count_lock); |
Paolo Bonzini | 4fa92fb | 2013-09-10 12:57:17 +0200 | [diff] [blame] | 2821 | if (kvm_usage_count) |
| 2822 | hardware_enable_nolock(NULL); |
Paolo Bonzini | 4a937f9 | 2013-09-10 12:58:35 +0200 | [diff] [blame] | 2823 | raw_spin_unlock(&kvm_count_lock); |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2824 | } |
| 2825 | |
| 2826 | static void hardware_disable_nolock(void *junk) |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 2827 | { |
| 2828 | int cpu = raw_smp_processor_id(); |
| 2829 | |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 2830 | if (!cpumask_test_cpu(cpu, cpus_hardware_enabled)) |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 2831 | return; |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 2832 | cpumask_clear_cpu(cpu, cpus_hardware_enabled); |
Radim Krčmář | 13a34e0 | 2014-08-28 15:13:03 +0200 | [diff] [blame] | 2833 | kvm_arch_hardware_disable(); |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 2834 | } |
| 2835 | |
Paolo Bonzini | 4fa92fb | 2013-09-10 12:57:17 +0200 | [diff] [blame] | 2836 | static void hardware_disable(void) |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2837 | { |
Paolo Bonzini | 4a937f9 | 2013-09-10 12:58:35 +0200 | [diff] [blame] | 2838 | raw_spin_lock(&kvm_count_lock); |
Paolo Bonzini | 4fa92fb | 2013-09-10 12:57:17 +0200 | [diff] [blame] | 2839 | if (kvm_usage_count) |
| 2840 | hardware_disable_nolock(NULL); |
Paolo Bonzini | 4a937f9 | 2013-09-10 12:58:35 +0200 | [diff] [blame] | 2841 | raw_spin_unlock(&kvm_count_lock); |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2842 | } |
| 2843 | |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2844 | static void hardware_disable_all_nolock(void) |
| 2845 | { |
| 2846 | BUG_ON(!kvm_usage_count); |
| 2847 | |
| 2848 | kvm_usage_count--; |
| 2849 | if (!kvm_usage_count) |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2850 | on_each_cpu(hardware_disable_nolock, NULL, 1); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2851 | } |
| 2852 | |
| 2853 | static void hardware_disable_all(void) |
| 2854 | { |
Paolo Bonzini | 4a937f9 | 2013-09-10 12:58:35 +0200 | [diff] [blame] | 2855 | raw_spin_lock(&kvm_count_lock); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2856 | hardware_disable_all_nolock(); |
Paolo Bonzini | 4a937f9 | 2013-09-10 12:58:35 +0200 | [diff] [blame] | 2857 | raw_spin_unlock(&kvm_count_lock); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2858 | } |
| 2859 | |
| 2860 | static int hardware_enable_all(void) |
| 2861 | { |
| 2862 | int r = 0; |
| 2863 | |
Paolo Bonzini | 4a937f9 | 2013-09-10 12:58:35 +0200 | [diff] [blame] | 2864 | raw_spin_lock(&kvm_count_lock); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2865 | |
| 2866 | kvm_usage_count++; |
| 2867 | if (kvm_usage_count == 1) { |
| 2868 | atomic_set(&hardware_enable_failed, 0); |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2869 | on_each_cpu(hardware_enable_nolock, NULL, 1); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2870 | |
| 2871 | if (atomic_read(&hardware_enable_failed)) { |
| 2872 | hardware_disable_all_nolock(); |
| 2873 | r = -EBUSY; |
| 2874 | } |
| 2875 | } |
| 2876 | |
Paolo Bonzini | 4a937f9 | 2013-09-10 12:58:35 +0200 | [diff] [blame] | 2877 | raw_spin_unlock(&kvm_count_lock); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 2878 | |
| 2879 | return r; |
| 2880 | } |
| 2881 | |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 2882 | static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val, |
| 2883 | void *v) |
| 2884 | { |
| 2885 | int cpu = (long)v; |
| 2886 | |
Avi Kivity | 1a6f4d7 | 2007-11-11 18:37:32 +0200 | [diff] [blame] | 2887 | val &= ~CPU_TASKS_FROZEN; |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 2888 | switch (val) { |
Avi Kivity | cec9ad2 | 2007-05-24 13:11:41 +0300 | [diff] [blame] | 2889 | case CPU_DYING: |
Xiubo Li | 1170adc | 2015-02-26 14:58:26 +0800 | [diff] [blame] | 2890 | pr_info("kvm: disabling virtualization on CPU%d\n", |
Avi Kivity | 6ec8a85 | 2007-08-19 15:57:26 +0300 | [diff] [blame] | 2891 | cpu); |
Paolo Bonzini | 4fa92fb | 2013-09-10 12:57:17 +0200 | [diff] [blame] | 2892 | hardware_disable(); |
Avi Kivity | 6ec8a85 | 2007-08-19 15:57:26 +0300 | [diff] [blame] | 2893 | break; |
Zachary Amsden | da908f2 | 2010-08-19 22:07:27 -1000 | [diff] [blame] | 2894 | case CPU_STARTING: |
Xiubo Li | 1170adc | 2015-02-26 14:58:26 +0800 | [diff] [blame] | 2895 | pr_info("kvm: enabling virtualization on CPU%d\n", |
Jeremy Katz | 43934a3 | 2007-02-19 14:37:46 +0200 | [diff] [blame] | 2896 | cpu); |
Paolo Bonzini | 4fa92fb | 2013-09-10 12:57:17 +0200 | [diff] [blame] | 2897 | hardware_enable(); |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 2898 | break; |
| 2899 | } |
| 2900 | return NOTIFY_OK; |
| 2901 | } |
| 2902 | |
Rusty Russell | 9a2b85c | 2007-07-17 23:17:55 +1000 | [diff] [blame] | 2903 | static int kvm_reboot(struct notifier_block *notifier, unsigned long val, |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 2904 | void *v) |
Rusty Russell | 9a2b85c | 2007-07-17 23:17:55 +1000 | [diff] [blame] | 2905 | { |
Sheng Yang | 8e1c181 | 2009-04-29 11:09:04 +0800 | [diff] [blame] | 2906 | /* |
| 2907 | * Some (well, at least mine) BIOSes hang on reboot if |
| 2908 | * in vmx root mode. |
| 2909 | * |
| 2910 | * And Intel TXT required VMX off for all cpu when system shutdown. |
| 2911 | */ |
Xiubo Li | 1170adc | 2015-02-26 14:58:26 +0800 | [diff] [blame] | 2912 | pr_info("kvm: exiting hardware virtualization\n"); |
Sheng Yang | 8e1c181 | 2009-04-29 11:09:04 +0800 | [diff] [blame] | 2913 | kvm_rebooting = true; |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 2914 | on_each_cpu(hardware_disable_nolock, NULL, 1); |
Rusty Russell | 9a2b85c | 2007-07-17 23:17:55 +1000 | [diff] [blame] | 2915 | return NOTIFY_OK; |
| 2916 | } |
| 2917 | |
| 2918 | static struct notifier_block kvm_reboot_notifier = { |
| 2919 | .notifier_call = kvm_reboot, |
| 2920 | .priority = 0, |
| 2921 | }; |
| 2922 | |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2923 | static void kvm_io_bus_destroy(struct kvm_io_bus *bus) |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 2924 | { |
| 2925 | int i; |
| 2926 | |
| 2927 | for (i = 0; i < bus->dev_count; i++) { |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2928 | struct kvm_io_device *pos = bus->range[i].dev; |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 2929 | |
| 2930 | kvm_iodevice_destructor(pos); |
| 2931 | } |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 2932 | kfree(bus); |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 2933 | } |
| 2934 | |
Paolo Bonzini | c21fbff | 2013-08-27 15:41:41 +0200 | [diff] [blame] | 2935 | static inline int kvm_io_bus_cmp(const struct kvm_io_range *r1, |
Xiubo Li | 20e87b7 | 2015-02-26 14:58:25 +0800 | [diff] [blame] | 2936 | const struct kvm_io_range *r2) |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2937 | { |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2938 | if (r1->addr < r2->addr) |
| 2939 | return -1; |
| 2940 | if (r1->addr + r1->len > r2->addr + r2->len) |
| 2941 | return 1; |
| 2942 | return 0; |
| 2943 | } |
| 2944 | |
Paolo Bonzini | a343c9b | 2013-07-16 13:03:29 +0200 | [diff] [blame] | 2945 | static int kvm_io_bus_sort_cmp(const void *p1, const void *p2) |
| 2946 | { |
Paolo Bonzini | c21fbff | 2013-08-27 15:41:41 +0200 | [diff] [blame] | 2947 | return kvm_io_bus_cmp(p1, p2); |
Paolo Bonzini | a343c9b | 2013-07-16 13:03:29 +0200 | [diff] [blame] | 2948 | } |
| 2949 | |
Geoff Levand | 39369f7 | 2013-04-05 19:20:30 +0000 | [diff] [blame] | 2950 | 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] | 2951 | gpa_t addr, int len) |
| 2952 | { |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2953 | bus->range[bus->dev_count++] = (struct kvm_io_range) { |
| 2954 | .addr = addr, |
| 2955 | .len = len, |
| 2956 | .dev = dev, |
| 2957 | }; |
| 2958 | |
| 2959 | sort(bus->range, bus->dev_count, sizeof(struct kvm_io_range), |
| 2960 | kvm_io_bus_sort_cmp, NULL); |
| 2961 | |
| 2962 | return 0; |
| 2963 | } |
| 2964 | |
Geoff Levand | 39369f7 | 2013-04-05 19:20:30 +0000 | [diff] [blame] | 2965 | 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] | 2966 | gpa_t addr, int len) |
| 2967 | { |
| 2968 | struct kvm_io_range *range, key; |
| 2969 | int off; |
| 2970 | |
| 2971 | key = (struct kvm_io_range) { |
| 2972 | .addr = addr, |
| 2973 | .len = len, |
| 2974 | }; |
| 2975 | |
| 2976 | range = bsearch(&key, bus->range, bus->dev_count, |
| 2977 | sizeof(struct kvm_io_range), kvm_io_bus_sort_cmp); |
| 2978 | if (range == NULL) |
| 2979 | return -ENOENT; |
| 2980 | |
| 2981 | off = range - bus->range; |
| 2982 | |
Paolo Bonzini | c21fbff | 2013-08-27 15:41:41 +0200 | [diff] [blame] | 2983 | while (off > 0 && kvm_io_bus_cmp(&key, &bus->range[off-1]) == 0) |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 2984 | off--; |
| 2985 | |
| 2986 | return off; |
| 2987 | } |
| 2988 | |
Nikolay Nikolaev | e32edf4 | 2015-03-26 14:39:28 +0000 | [diff] [blame] | 2989 | static int __kvm_io_bus_write(struct kvm_vcpu *vcpu, struct kvm_io_bus *bus, |
Cornelia Huck | 126a5af | 2013-07-03 16:30:53 +0200 | [diff] [blame] | 2990 | struct kvm_io_range *range, const void *val) |
| 2991 | { |
| 2992 | int idx; |
| 2993 | |
| 2994 | idx = kvm_io_bus_get_first_dev(bus, range->addr, range->len); |
| 2995 | if (idx < 0) |
| 2996 | return -EOPNOTSUPP; |
| 2997 | |
| 2998 | while (idx < bus->dev_count && |
Paolo Bonzini | c21fbff | 2013-08-27 15:41:41 +0200 | [diff] [blame] | 2999 | kvm_io_bus_cmp(range, &bus->range[idx]) == 0) { |
Nikolay Nikolaev | e32edf4 | 2015-03-26 14:39:28 +0000 | [diff] [blame] | 3000 | if (!kvm_iodevice_write(vcpu, bus->range[idx].dev, range->addr, |
Cornelia Huck | 126a5af | 2013-07-03 16:30:53 +0200 | [diff] [blame] | 3001 | range->len, val)) |
| 3002 | return idx; |
| 3003 | idx++; |
| 3004 | } |
| 3005 | |
| 3006 | return -EOPNOTSUPP; |
| 3007 | } |
| 3008 | |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 3009 | /* kvm_io_bus_write - called under kvm->slots_lock */ |
Nikolay Nikolaev | e32edf4 | 2015-03-26 14:39:28 +0000 | [diff] [blame] | 3010 | int kvm_io_bus_write(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr, |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 3011 | int len, const void *val) |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 3012 | { |
Cornelia Huck | 126a5af | 2013-07-03 16:30:53 +0200 | [diff] [blame] | 3013 | struct kvm_io_bus *bus; |
| 3014 | struct kvm_io_range range; |
| 3015 | int r; |
| 3016 | |
| 3017 | range = (struct kvm_io_range) { |
| 3018 | .addr = addr, |
| 3019 | .len = len, |
| 3020 | }; |
| 3021 | |
Nikolay Nikolaev | e32edf4 | 2015-03-26 14:39:28 +0000 | [diff] [blame] | 3022 | bus = srcu_dereference(vcpu->kvm->buses[bus_idx], &vcpu->kvm->srcu); |
| 3023 | r = __kvm_io_bus_write(vcpu, bus, &range, val); |
Cornelia Huck | 126a5af | 2013-07-03 16:30:53 +0200 | [diff] [blame] | 3024 | return r < 0 ? r : 0; |
| 3025 | } |
| 3026 | |
| 3027 | /* kvm_io_bus_write_cookie - called under kvm->slots_lock */ |
Nikolay Nikolaev | e32edf4 | 2015-03-26 14:39:28 +0000 | [diff] [blame] | 3028 | int kvm_io_bus_write_cookie(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, |
| 3029 | gpa_t addr, int len, const void *val, long cookie) |
Cornelia Huck | 126a5af | 2013-07-03 16:30:53 +0200 | [diff] [blame] | 3030 | { |
Lai Jiangshan | 90d83dc | 2010-04-19 17:41:23 +0800 | [diff] [blame] | 3031 | struct kvm_io_bus *bus; |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 3032 | struct kvm_io_range range; |
| 3033 | |
| 3034 | range = (struct kvm_io_range) { |
| 3035 | .addr = addr, |
| 3036 | .len = len, |
| 3037 | }; |
Lai Jiangshan | 90d83dc | 2010-04-19 17:41:23 +0800 | [diff] [blame] | 3038 | |
Nikolay Nikolaev | e32edf4 | 2015-03-26 14:39:28 +0000 | [diff] [blame] | 3039 | bus = srcu_dereference(vcpu->kvm->buses[bus_idx], &vcpu->kvm->srcu); |
Cornelia Huck | 126a5af | 2013-07-03 16:30:53 +0200 | [diff] [blame] | 3040 | |
| 3041 | /* First try the device referenced by cookie. */ |
| 3042 | if ((cookie >= 0) && (cookie < bus->dev_count) && |
Paolo Bonzini | c21fbff | 2013-08-27 15:41:41 +0200 | [diff] [blame] | 3043 | (kvm_io_bus_cmp(&range, &bus->range[cookie]) == 0)) |
Nikolay Nikolaev | e32edf4 | 2015-03-26 14:39:28 +0000 | [diff] [blame] | 3044 | if (!kvm_iodevice_write(vcpu, bus->range[cookie].dev, addr, len, |
Cornelia Huck | 126a5af | 2013-07-03 16:30:53 +0200 | [diff] [blame] | 3045 | val)) |
| 3046 | return cookie; |
| 3047 | |
| 3048 | /* |
| 3049 | * cookie contained garbage; fall back to search and return the |
| 3050 | * correct cookie value. |
| 3051 | */ |
Nikolay Nikolaev | e32edf4 | 2015-03-26 14:39:28 +0000 | [diff] [blame] | 3052 | return __kvm_io_bus_write(vcpu, bus, &range, val); |
Cornelia Huck | 126a5af | 2013-07-03 16:30:53 +0200 | [diff] [blame] | 3053 | } |
| 3054 | |
Nikolay Nikolaev | e32edf4 | 2015-03-26 14:39:28 +0000 | [diff] [blame] | 3055 | static int __kvm_io_bus_read(struct kvm_vcpu *vcpu, struct kvm_io_bus *bus, |
| 3056 | struct kvm_io_range *range, void *val) |
Cornelia Huck | 126a5af | 2013-07-03 16:30:53 +0200 | [diff] [blame] | 3057 | { |
| 3058 | int idx; |
| 3059 | |
| 3060 | idx = kvm_io_bus_get_first_dev(bus, range->addr, range->len); |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 3061 | if (idx < 0) |
| 3062 | return -EOPNOTSUPP; |
| 3063 | |
| 3064 | while (idx < bus->dev_count && |
Paolo Bonzini | c21fbff | 2013-08-27 15:41:41 +0200 | [diff] [blame] | 3065 | kvm_io_bus_cmp(range, &bus->range[idx]) == 0) { |
Nikolay Nikolaev | e32edf4 | 2015-03-26 14:39:28 +0000 | [diff] [blame] | 3066 | if (!kvm_iodevice_read(vcpu, bus->range[idx].dev, range->addr, |
Cornelia Huck | 126a5af | 2013-07-03 16:30:53 +0200 | [diff] [blame] | 3067 | range->len, val)) |
| 3068 | return idx; |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 3069 | idx++; |
| 3070 | } |
| 3071 | |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 3072 | return -EOPNOTSUPP; |
| 3073 | } |
Michael S. Tsirkin | 68c3b4d | 2014-03-31 21:50:44 +0300 | [diff] [blame] | 3074 | EXPORT_SYMBOL_GPL(kvm_io_bus_write); |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 3075 | |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 3076 | /* kvm_io_bus_read - called under kvm->slots_lock */ |
Nikolay Nikolaev | e32edf4 | 2015-03-26 14:39:28 +0000 | [diff] [blame] | 3077 | int kvm_io_bus_read(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, gpa_t addr, |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 3078 | int len, void *val) |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 3079 | { |
Cornelia Huck | 126a5af | 2013-07-03 16:30:53 +0200 | [diff] [blame] | 3080 | struct kvm_io_bus *bus; |
| 3081 | struct kvm_io_range range; |
| 3082 | int r; |
| 3083 | |
| 3084 | range = (struct kvm_io_range) { |
| 3085 | .addr = addr, |
| 3086 | .len = len, |
| 3087 | }; |
| 3088 | |
Nikolay Nikolaev | e32edf4 | 2015-03-26 14:39:28 +0000 | [diff] [blame] | 3089 | bus = srcu_dereference(vcpu->kvm->buses[bus_idx], &vcpu->kvm->srcu); |
| 3090 | r = __kvm_io_bus_read(vcpu, bus, &range, val); |
Cornelia Huck | 126a5af | 2013-07-03 16:30:53 +0200 | [diff] [blame] | 3091 | return r < 0 ? r : 0; |
| 3092 | } |
| 3093 | |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 3094 | |
Marcelo Tosatti | 79fac95 | 2009-12-23 14:35:26 -0200 | [diff] [blame] | 3095 | /* Caller must hold slots_lock. */ |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 3096 | int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, |
| 3097 | int len, struct kvm_io_device *dev) |
Michael S. Tsirkin | 6c47469 | 2009-06-29 22:24:26 +0300 | [diff] [blame] | 3098 | { |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 3099 | struct kvm_io_bus *new_bus, *bus; |
Gregory Haskins | 090b7af | 2009-07-07 17:08:44 -0400 | [diff] [blame] | 3100 | |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 3101 | bus = kvm->buses[bus_idx]; |
Amos Kong | 6ea34c9 | 2013-05-25 06:44:15 +0800 | [diff] [blame] | 3102 | /* exclude ioeventfd which is limited by maximum fd */ |
| 3103 | if (bus->dev_count - bus->ioeventfd_count > NR_IOBUS_DEVS - 1) |
Gregory Haskins | 090b7af | 2009-07-07 17:08:44 -0400 | [diff] [blame] | 3104 | return -ENOSPC; |
| 3105 | |
Amos Kong | a1300716 | 2012-03-09 12:17:32 +0800 | [diff] [blame] | 3106 | new_bus = kzalloc(sizeof(*bus) + ((bus->dev_count + 1) * |
| 3107 | sizeof(struct kvm_io_range)), GFP_KERNEL); |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 3108 | if (!new_bus) |
| 3109 | return -ENOMEM; |
Amos Kong | a1300716 | 2012-03-09 12:17:32 +0800 | [diff] [blame] | 3110 | memcpy(new_bus, bus, sizeof(*bus) + (bus->dev_count * |
| 3111 | sizeof(struct kvm_io_range))); |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 3112 | kvm_io_bus_insert_dev(new_bus, dev, addr, len); |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 3113 | rcu_assign_pointer(kvm->buses[bus_idx], new_bus); |
| 3114 | synchronize_srcu_expedited(&kvm->srcu); |
| 3115 | kfree(bus); |
Gregory Haskins | 090b7af | 2009-07-07 17:08:44 -0400 | [diff] [blame] | 3116 | |
| 3117 | return 0; |
| 3118 | } |
| 3119 | |
Marcelo Tosatti | 79fac95 | 2009-12-23 14:35:26 -0200 | [diff] [blame] | 3120 | /* Caller must hold slots_lock. */ |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 3121 | int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx, |
| 3122 | struct kvm_io_device *dev) |
Gregory Haskins | 090b7af | 2009-07-07 17:08:44 -0400 | [diff] [blame] | 3123 | { |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 3124 | int i, r; |
| 3125 | struct kvm_io_bus *new_bus, *bus; |
Michael S. Tsirkin | 6c47469 | 2009-06-29 22:24:26 +0300 | [diff] [blame] | 3126 | |
Sasha Levin | cdfca7b | 2011-12-04 19:36:28 +0200 | [diff] [blame] | 3127 | bus = kvm->buses[bus_idx]; |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 3128 | r = -ENOENT; |
Amos Kong | a1300716 | 2012-03-09 12:17:32 +0800 | [diff] [blame] | 3129 | for (i = 0; i < bus->dev_count; i++) |
| 3130 | if (bus->range[i].dev == dev) { |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 3131 | r = 0; |
Gregory Haskins | 090b7af | 2009-07-07 17:08:44 -0400 | [diff] [blame] | 3132 | break; |
| 3133 | } |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 3134 | |
Amos Kong | a1300716 | 2012-03-09 12:17:32 +0800 | [diff] [blame] | 3135 | if (r) |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 3136 | return r; |
Amos Kong | a1300716 | 2012-03-09 12:17:32 +0800 | [diff] [blame] | 3137 | |
| 3138 | new_bus = kzalloc(sizeof(*bus) + ((bus->dev_count - 1) * |
| 3139 | sizeof(struct kvm_io_range)), GFP_KERNEL); |
| 3140 | if (!new_bus) |
| 3141 | return -ENOMEM; |
| 3142 | |
| 3143 | memcpy(new_bus, bus, sizeof(*bus) + i * sizeof(struct kvm_io_range)); |
| 3144 | new_bus->dev_count--; |
| 3145 | memcpy(new_bus->range + i, bus->range + i + 1, |
| 3146 | (new_bus->dev_count - i) * sizeof(struct kvm_io_range)); |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 3147 | |
| 3148 | rcu_assign_pointer(kvm->buses[bus_idx], new_bus); |
| 3149 | synchronize_srcu_expedited(&kvm->srcu); |
| 3150 | kfree(bus); |
| 3151 | return r; |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 3152 | } |
| 3153 | |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 3154 | static struct notifier_block kvm_cpu_notifier = { |
| 3155 | .notifier_call = kvm_cpu_hotplug, |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 3156 | }; |
| 3157 | |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 3158 | static int vm_stat_get(void *_offset, u64 *val) |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 3159 | { |
| 3160 | unsigned offset = (long)_offset; |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 3161 | struct kvm *kvm; |
| 3162 | |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 3163 | *val = 0; |
Paolo Bonzini | 2f303b7 | 2013-09-25 13:53:07 +0200 | [diff] [blame] | 3164 | spin_lock(&kvm_lock); |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 3165 | list_for_each_entry(kvm, &vm_list, vm_list) |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 3166 | *val += *(u32 *)((void *)kvm + offset); |
Paolo Bonzini | 2f303b7 | 2013-09-25 13:53:07 +0200 | [diff] [blame] | 3167 | spin_unlock(&kvm_lock); |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 3168 | return 0; |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 3169 | } |
| 3170 | |
| 3171 | DEFINE_SIMPLE_ATTRIBUTE(vm_stat_fops, vm_stat_get, NULL, "%llu\n"); |
| 3172 | |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 3173 | static int vcpu_stat_get(void *_offset, u64 *val) |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 3174 | { |
| 3175 | unsigned offset = (long)_offset; |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 3176 | struct kvm *kvm; |
| 3177 | struct kvm_vcpu *vcpu; |
| 3178 | int i; |
| 3179 | |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 3180 | *val = 0; |
Paolo Bonzini | 2f303b7 | 2013-09-25 13:53:07 +0200 | [diff] [blame] | 3181 | spin_lock(&kvm_lock); |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 3182 | list_for_each_entry(kvm, &vm_list, vm_list) |
Gleb Natapov | 988a2ca | 2009-06-09 15:56:29 +0300 | [diff] [blame] | 3183 | kvm_for_each_vcpu(i, vcpu, kvm) |
| 3184 | *val += *(u32 *)((void *)vcpu + offset); |
| 3185 | |
Paolo Bonzini | 2f303b7 | 2013-09-25 13:53:07 +0200 | [diff] [blame] | 3186 | spin_unlock(&kvm_lock); |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 3187 | return 0; |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 3188 | } |
| 3189 | |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 3190 | DEFINE_SIMPLE_ATTRIBUTE(vcpu_stat_fops, vcpu_stat_get, NULL, "%llu\n"); |
| 3191 | |
Alexey Dobriyan | 828c095 | 2009-10-01 15:43:56 -0700 | [diff] [blame] | 3192 | static const struct file_operations *stat_fops[] = { |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 3193 | [KVM_STAT_VCPU] = &vcpu_stat_fops, |
| 3194 | [KVM_STAT_VM] = &vm_stat_fops, |
| 3195 | }; |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 3196 | |
Hamo | 4f69b68 | 2011-12-15 14:23:16 +0800 | [diff] [blame] | 3197 | static int kvm_init_debug(void) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3198 | { |
Paolo Bonzini | 0c8eb04 | 2013-10-30 12:12:13 +0100 | [diff] [blame] | 3199 | int r = -EEXIST; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3200 | struct kvm_stats_debugfs_item *p; |
| 3201 | |
Hollis Blanchard | 76f7c87 | 2008-04-15 16:05:42 -0500 | [diff] [blame] | 3202 | kvm_debugfs_dir = debugfs_create_dir("kvm", NULL); |
Hamo | 4f69b68 | 2011-12-15 14:23:16 +0800 | [diff] [blame] | 3203 | if (kvm_debugfs_dir == NULL) |
| 3204 | goto out; |
| 3205 | |
| 3206 | for (p = debugfs_entries; p->name; ++p) { |
Hollis Blanchard | 76f7c87 | 2008-04-15 16:05:42 -0500 | [diff] [blame] | 3207 | p->dentry = debugfs_create_file(p->name, 0444, kvm_debugfs_dir, |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 3208 | (void *)(long)p->offset, |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 3209 | stat_fops[p->kind]); |
Hamo | 4f69b68 | 2011-12-15 14:23:16 +0800 | [diff] [blame] | 3210 | if (p->dentry == NULL) |
| 3211 | goto out_dir; |
| 3212 | } |
| 3213 | |
| 3214 | return 0; |
| 3215 | |
| 3216 | out_dir: |
| 3217 | debugfs_remove_recursive(kvm_debugfs_dir); |
| 3218 | out: |
| 3219 | return r; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3220 | } |
| 3221 | |
| 3222 | static void kvm_exit_debug(void) |
| 3223 | { |
| 3224 | struct kvm_stats_debugfs_item *p; |
| 3225 | |
| 3226 | for (p = debugfs_entries; p->name; ++p) |
| 3227 | debugfs_remove(p->dentry); |
Hollis Blanchard | 76f7c87 | 2008-04-15 16:05:42 -0500 | [diff] [blame] | 3228 | debugfs_remove(kvm_debugfs_dir); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3229 | } |
| 3230 | |
Rafael J. Wysocki | fb3600c | 2011-03-23 22:16:23 +0100 | [diff] [blame] | 3231 | static int kvm_suspend(void) |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 3232 | { |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 3233 | if (kvm_usage_count) |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 3234 | hardware_disable_nolock(NULL); |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 3235 | return 0; |
| 3236 | } |
| 3237 | |
Rafael J. Wysocki | fb3600c | 2011-03-23 22:16:23 +0100 | [diff] [blame] | 3238 | static void kvm_resume(void) |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 3239 | { |
Zachary Amsden | ca84d1a | 2010-08-19 22:07:28 -1000 | [diff] [blame] | 3240 | if (kvm_usage_count) { |
Paolo Bonzini | 4a937f9 | 2013-09-10 12:58:35 +0200 | [diff] [blame] | 3241 | WARN_ON(raw_spin_is_locked(&kvm_count_lock)); |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 3242 | hardware_enable_nolock(NULL); |
Zachary Amsden | ca84d1a | 2010-08-19 22:07:28 -1000 | [diff] [blame] | 3243 | } |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 3244 | } |
| 3245 | |
Rafael J. Wysocki | fb3600c | 2011-03-23 22:16:23 +0100 | [diff] [blame] | 3246 | static struct syscore_ops kvm_syscore_ops = { |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 3247 | .suspend = kvm_suspend, |
| 3248 | .resume = kvm_resume, |
| 3249 | }; |
| 3250 | |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 3251 | static inline |
| 3252 | struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn) |
| 3253 | { |
| 3254 | return container_of(pn, struct kvm_vcpu, preempt_notifier); |
| 3255 | } |
| 3256 | |
| 3257 | static void kvm_sched_in(struct preempt_notifier *pn, int cpu) |
| 3258 | { |
| 3259 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); |
Xiubo Li | f95ef0c | 2015-02-26 14:58:23 +0800 | [diff] [blame] | 3260 | |
Raghavendra K T | 3a08a8f | 2013-03-04 23:32:07 +0530 | [diff] [blame] | 3261 | if (vcpu->preempted) |
| 3262 | vcpu->preempted = false; |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 3263 | |
Radim Krčmář | e790d9e | 2014-08-21 18:08:05 +0200 | [diff] [blame] | 3264 | kvm_arch_sched_in(vcpu, cpu); |
| 3265 | |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 3266 | kvm_arch_vcpu_load(vcpu, cpu); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 3267 | } |
| 3268 | |
| 3269 | static void kvm_sched_out(struct preempt_notifier *pn, |
| 3270 | struct task_struct *next) |
| 3271 | { |
| 3272 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); |
| 3273 | |
Raghavendra K T | 3a08a8f | 2013-03-04 23:32:07 +0530 | [diff] [blame] | 3274 | if (current->state == TASK_RUNNING) |
| 3275 | vcpu->preempted = true; |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 3276 | kvm_arch_vcpu_put(vcpu); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 3277 | } |
| 3278 | |
Avi Kivity | 0ee75be | 2010-04-28 15:39:01 +0300 | [diff] [blame] | 3279 | int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align, |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 3280 | struct module *module) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3281 | { |
| 3282 | int r; |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 3283 | int cpu; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3284 | |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 3285 | r = kvm_arch_init(opaque); |
| 3286 | if (r) |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 3287 | goto out_fail; |
Zhang Xiantao | cb498ea | 2007-11-14 20:39:31 +0800 | [diff] [blame] | 3288 | |
Asias He | 7dac16c | 2013-05-08 10:57:29 +0800 | [diff] [blame] | 3289 | /* |
| 3290 | * kvm_arch_init makes sure there's at most one caller |
| 3291 | * for architectures that support multiple implementations, |
| 3292 | * like intel and amd on x86. |
| 3293 | * kvm_arch_init must be called before kvm_irqfd_init to avoid creating |
| 3294 | * conflicts in case kvm is already setup for another implementation. |
| 3295 | */ |
| 3296 | r = kvm_irqfd_init(); |
| 3297 | if (r) |
| 3298 | goto out_irqfd; |
| 3299 | |
Avi Kivity | 8437a61 | 2009-06-06 14:52:35 -0700 | [diff] [blame] | 3300 | if (!zalloc_cpumask_var(&cpus_hardware_enabled, GFP_KERNEL)) { |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 3301 | r = -ENOMEM; |
| 3302 | goto out_free_0; |
| 3303 | } |
| 3304 | |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 3305 | r = kvm_arch_hardware_setup(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3306 | if (r < 0) |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 3307 | goto out_free_0a; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3308 | |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 3309 | for_each_online_cpu(cpu) { |
| 3310 | smp_call_function_single(cpu, |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 3311 | kvm_arch_check_processor_compat, |
Jens Axboe | 8691e5a | 2008-06-06 11:18:06 +0200 | [diff] [blame] | 3312 | &r, 1); |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 3313 | if (r < 0) |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 3314 | goto out_free_1; |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 3315 | } |
| 3316 | |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 3317 | r = register_cpu_notifier(&kvm_cpu_notifier); |
| 3318 | if (r) |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 3319 | goto out_free_2; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3320 | register_reboot_notifier(&kvm_reboot_notifier); |
| 3321 | |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 3322 | /* A kmem cache lets us meet the alignment requirements of fx_save. */ |
Avi Kivity | 0ee75be | 2010-04-28 15:39:01 +0300 | [diff] [blame] | 3323 | if (!vcpu_align) |
| 3324 | vcpu_align = __alignof__(struct kvm_vcpu); |
| 3325 | kvm_vcpu_cache = kmem_cache_create("kvm_vcpu", vcpu_size, vcpu_align, |
Joe Perches | 56919c5 | 2007-11-12 20:06:51 -0800 | [diff] [blame] | 3326 | 0, NULL); |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 3327 | if (!kvm_vcpu_cache) { |
| 3328 | r = -ENOMEM; |
Rafael J. Wysocki | fb3600c | 2011-03-23 22:16:23 +0100 | [diff] [blame] | 3329 | goto out_free_3; |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 3330 | } |
| 3331 | |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 3332 | r = kvm_async_pf_init(); |
| 3333 | if (r) |
| 3334 | goto out_free; |
| 3335 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3336 | kvm_chardev_ops.owner = module; |
Christian Borntraeger | 3d3aab1 | 2008-12-02 11:17:32 +0100 | [diff] [blame] | 3337 | kvm_vm_fops.owner = module; |
| 3338 | kvm_vcpu_fops.owner = module; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3339 | |
| 3340 | r = misc_register(&kvm_dev); |
| 3341 | if (r) { |
Xiubo Li | 1170adc | 2015-02-26 14:58:26 +0800 | [diff] [blame] | 3342 | pr_err("kvm: misc device register failed\n"); |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 3343 | goto out_unreg; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3344 | } |
| 3345 | |
Rafael J. Wysocki | fb3600c | 2011-03-23 22:16:23 +0100 | [diff] [blame] | 3346 | register_syscore_ops(&kvm_syscore_ops); |
| 3347 | |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 3348 | kvm_preempt_ops.sched_in = kvm_sched_in; |
| 3349 | kvm_preempt_ops.sched_out = kvm_sched_out; |
| 3350 | |
Hamo | 4f69b68 | 2011-12-15 14:23:16 +0800 | [diff] [blame] | 3351 | r = kvm_init_debug(); |
| 3352 | if (r) { |
Xiubo Li | 1170adc | 2015-02-26 14:58:26 +0800 | [diff] [blame] | 3353 | pr_err("kvm: create debugfs files failed\n"); |
Hamo | 4f69b68 | 2011-12-15 14:23:16 +0800 | [diff] [blame] | 3354 | goto out_undebugfs; |
| 3355 | } |
Darrick J. Wong | 0ea4ed8 | 2009-10-14 16:21:00 -0700 | [diff] [blame] | 3356 | |
Paolo Bonzini | 3c3c29f | 2014-09-24 13:02:46 +0200 | [diff] [blame] | 3357 | r = kvm_vfio_ops_init(); |
| 3358 | WARN_ON(r); |
| 3359 | |
Avi Kivity | c7addb9 | 2007-09-16 18:58:32 +0200 | [diff] [blame] | 3360 | return 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3361 | |
Hamo | 4f69b68 | 2011-12-15 14:23:16 +0800 | [diff] [blame] | 3362 | out_undebugfs: |
| 3363 | unregister_syscore_ops(&kvm_syscore_ops); |
Wei Yongjun | afc2f79 | 2013-05-05 20:03:40 +0800 | [diff] [blame] | 3364 | misc_deregister(&kvm_dev); |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 3365 | out_unreg: |
| 3366 | kvm_async_pf_deinit(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3367 | out_free: |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 3368 | kmem_cache_destroy(kvm_vcpu_cache); |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 3369 | out_free_3: |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3370 | unregister_reboot_notifier(&kvm_reboot_notifier); |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 3371 | unregister_cpu_notifier(&kvm_cpu_notifier); |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 3372 | out_free_2: |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 3373 | out_free_1: |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 3374 | kvm_arch_hardware_unsetup(); |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 3375 | out_free_0a: |
| 3376 | free_cpumask_var(cpus_hardware_enabled); |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 3377 | out_free_0: |
Cornelia Huck | a0f155e | 2013-02-28 12:33:18 +0100 | [diff] [blame] | 3378 | kvm_irqfd_exit(); |
| 3379 | out_irqfd: |
Asias He | 7dac16c | 2013-05-08 10:57:29 +0800 | [diff] [blame] | 3380 | kvm_arch_exit(); |
| 3381 | out_fail: |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3382 | return r; |
| 3383 | } |
Zhang Xiantao | cb498ea | 2007-11-14 20:39:31 +0800 | [diff] [blame] | 3384 | EXPORT_SYMBOL_GPL(kvm_init); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3385 | |
Zhang Xiantao | cb498ea | 2007-11-14 20:39:31 +0800 | [diff] [blame] | 3386 | void kvm_exit(void) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3387 | { |
Darrick J. Wong | 0ea4ed8 | 2009-10-14 16:21:00 -0700 | [diff] [blame] | 3388 | kvm_exit_debug(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3389 | misc_deregister(&kvm_dev); |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 3390 | kmem_cache_destroy(kvm_vcpu_cache); |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 3391 | kvm_async_pf_deinit(); |
Rafael J. Wysocki | fb3600c | 2011-03-23 22:16:23 +0100 | [diff] [blame] | 3392 | unregister_syscore_ops(&kvm_syscore_ops); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3393 | unregister_reboot_notifier(&kvm_reboot_notifier); |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 3394 | unregister_cpu_notifier(&kvm_cpu_notifier); |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 3395 | on_each_cpu(hardware_disable_nolock, NULL, 1); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 3396 | kvm_arch_hardware_unsetup(); |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 3397 | kvm_arch_exit(); |
Cornelia Huck | a0f155e | 2013-02-28 12:33:18 +0100 | [diff] [blame] | 3398 | kvm_irqfd_exit(); |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 3399 | free_cpumask_var(cpus_hardware_enabled); |
Wanpeng Li | 571ee1b | 2014-10-09 18:30:08 +0800 | [diff] [blame] | 3400 | kvm_vfio_ops_exit(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3401 | } |
Zhang Xiantao | cb498ea | 2007-11-14 20:39:31 +0800 | [diff] [blame] | 3402 | EXPORT_SYMBOL_GPL(kvm_exit); |