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 | |
David Hildenbrand | 920552b | 2015-09-18 12:34:53 +0200 | [diff] [blame] | 69 | /* Architectures should define their poll value according to the halt latency */ |
| 70 | static unsigned int halt_poll_ns = KVM_HALT_POLL_NS_DEFAULT; |
Paolo Bonzini | f781951 | 2015-02-04 18:20:58 +0100 | [diff] [blame] | 71 | module_param(halt_poll_ns, uint, S_IRUGO | S_IWUSR); |
| 72 | |
Wanpeng Li | aca6ff2 | 2015-09-03 22:07:38 +0800 | [diff] [blame] | 73 | /* Default doubles per-vcpu halt_poll_ns. */ |
| 74 | static unsigned int halt_poll_ns_grow = 2; |
Christian Borntraeger | 6b6de68 | 2016-02-09 13:47:55 +0100 | [diff] [blame] | 75 | module_param(halt_poll_ns_grow, uint, S_IRUGO | S_IWUSR); |
Wanpeng Li | aca6ff2 | 2015-09-03 22:07:38 +0800 | [diff] [blame] | 76 | |
| 77 | /* Default resets per-vcpu halt_poll_ns . */ |
| 78 | static unsigned int halt_poll_ns_shrink; |
Christian Borntraeger | 6b6de68 | 2016-02-09 13:47:55 +0100 | [diff] [blame] | 79 | module_param(halt_poll_ns_shrink, uint, S_IRUGO | S_IWUSR); |
Wanpeng Li | aca6ff2 | 2015-09-03 22:07:38 +0800 | [diff] [blame] | 80 | |
Marcelo Tosatti | fa40a82 | 2009-06-04 15:08:24 -0300 | [diff] [blame] | 81 | /* |
| 82 | * Ordering of locks: |
| 83 | * |
Xiubo Li | b7d409d | 2015-02-26 14:58:24 +0800 | [diff] [blame] | 84 | * kvm->lock --> kvm->slots_lock --> kvm->irq_lock |
Marcelo Tosatti | fa40a82 | 2009-06-04 15:08:24 -0300 | [diff] [blame] | 85 | */ |
| 86 | |
Paolo Bonzini | 2f303b7 | 2013-09-25 13:53:07 +0200 | [diff] [blame] | 87 | DEFINE_SPINLOCK(kvm_lock); |
Paolo Bonzini | 4a937f9 | 2013-09-10 12:58:35 +0200 | [diff] [blame] | 88 | static DEFINE_RAW_SPINLOCK(kvm_count_lock); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 89 | LIST_HEAD(vm_list); |
Avi Kivity | 133de90 | 2007-02-12 00:54:44 -0800 | [diff] [blame] | 90 | |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 91 | static cpumask_var_t cpus_hardware_enabled; |
Xiubo Li | f4fee93 | 2015-02-26 14:58:21 +0800 | [diff] [blame] | 92 | static int kvm_usage_count; |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 93 | static atomic_t hardware_enable_failed; |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 94 | |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 95 | struct kmem_cache *kvm_vcpu_cache; |
| 96 | EXPORT_SYMBOL_GPL(kvm_vcpu_cache); |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 97 | |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 98 | static __read_mostly struct preempt_ops kvm_preempt_ops; |
| 99 | |
Hollis Blanchard | 76f7c87 | 2008-04-15 16:05:42 -0500 | [diff] [blame] | 100 | struct dentry *kvm_debugfs_dir; |
Paul Mackerras | e23a808 | 2015-03-28 14:21:01 +1100 | [diff] [blame] | 101 | EXPORT_SYMBOL_GPL(kvm_debugfs_dir); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 102 | |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 103 | static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl, |
| 104 | unsigned long arg); |
Christian Borntraeger | de8e5d7 | 2015-02-03 09:35:15 +0100 | [diff] [blame] | 105 | #ifdef CONFIG_KVM_COMPAT |
Alexander Graf | 1dda606 | 2011-06-08 02:45:37 +0200 | [diff] [blame] | 106 | static long kvm_vcpu_compat_ioctl(struct file *file, unsigned int ioctl, |
| 107 | unsigned long arg); |
| 108 | #endif |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 109 | static int hardware_enable_all(void); |
| 110 | static void hardware_disable_all(void); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 111 | |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 112 | static void kvm_io_bus_destroy(struct kvm_io_bus *bus); |
Stephen Hemminger | 7940876 | 2013-12-29 12:12:29 -0800 | [diff] [blame] | 113 | |
Dan Williams | ba049e9 | 2016-01-15 16:56:11 -0800 | [diff] [blame] | 114 | static void kvm_release_pfn_dirty(kvm_pfn_t pfn); |
Paolo Bonzini | bc009e4 | 2015-05-26 12:43:41 +0200 | [diff] [blame] | 115 | static void mark_page_dirty_in_slot(struct kvm_memory_slot *memslot, gfn_t gfn); |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 116 | |
Andi Kleen | 5248013 | 2014-02-08 08:51:57 +0100 | [diff] [blame] | 117 | __visible bool kvm_rebooting; |
Avi Kivity | b7c4145 | 2010-12-02 17:52:50 +0200 | [diff] [blame] | 118 | EXPORT_SYMBOL_GPL(kvm_rebooting); |
Avi Kivity | 4ecac3f | 2008-05-13 13:23:38 +0300 | [diff] [blame] | 119 | |
Marcelo Tosatti | 54dee99 | 2009-06-11 12:07:44 -0300 | [diff] [blame] | 120 | static bool largepages_enabled = true; |
| 121 | |
Dan Williams | ba049e9 | 2016-01-15 16:56:11 -0800 | [diff] [blame] | 122 | bool kvm_is_reserved_pfn(kvm_pfn_t pfn) |
Ben-Ami Yassour | cbff90a | 2008-07-28 19:26:24 +0300 | [diff] [blame] | 123 | { |
Andrea Arcangeli | 11feeb4 | 2013-07-25 03:04:38 +0200 | [diff] [blame] | 124 | if (pfn_valid(pfn)) |
Ard Biesheuvel | bf4bea8 | 2014-11-10 08:33:56 +0000 | [diff] [blame] | 125 | return PageReserved(pfn_to_page(pfn)); |
Ben-Ami Yassour | cbff90a | 2008-07-28 19:26:24 +0300 | [diff] [blame] | 126 | |
| 127 | return true; |
| 128 | } |
| 129 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 130 | /* |
| 131 | * Switches to specified vcpu, until a matching vcpu_put() |
| 132 | */ |
Michael S. Tsirkin | 9fc7744 | 2012-09-16 11:50:30 +0300 | [diff] [blame] | 133 | int vcpu_load(struct kvm_vcpu *vcpu) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 134 | { |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 135 | int cpu; |
| 136 | |
Michael S. Tsirkin | 9fc7744 | 2012-09-16 11:50:30 +0300 | [diff] [blame] | 137 | if (mutex_lock_killable(&vcpu->mutex)) |
| 138 | return -EINTR; |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 139 | cpu = get_cpu(); |
| 140 | preempt_notifier_register(&vcpu->preempt_notifier); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 141 | kvm_arch_vcpu_load(vcpu, cpu); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 142 | put_cpu(); |
Michael S. Tsirkin | 9fc7744 | 2012-09-16 11:50:30 +0300 | [diff] [blame] | 143 | return 0; |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 144 | } |
| 145 | |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 146 | void vcpu_put(struct kvm_vcpu *vcpu) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 147 | { |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 148 | preempt_disable(); |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 149 | kvm_arch_vcpu_put(vcpu); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 150 | preempt_notifier_unregister(&vcpu->preempt_notifier); |
| 151 | preempt_enable(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 152 | mutex_unlock(&vcpu->mutex); |
| 153 | } |
| 154 | |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 155 | static void ack_flush(void *_completed) |
| 156 | { |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 157 | } |
| 158 | |
Tang Chen | 445b823 | 2014-09-24 15:57:55 +0800 | [diff] [blame] | 159 | bool kvm_make_all_cpus_request(struct kvm *kvm, unsigned int req) |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 160 | { |
Avi Kivity | 597a5f5 | 2008-07-20 14:24:22 +0300 | [diff] [blame] | 161 | int i, cpu, me; |
Rusty Russell | 6ef7a1b | 2008-12-08 20:28:04 +1030 | [diff] [blame] | 162 | cpumask_var_t cpus; |
| 163 | bool called = true; |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 164 | struct kvm_vcpu *vcpu; |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 165 | |
Li Zefan | 79f5599 | 2009-06-15 14:58:26 +0800 | [diff] [blame] | 166 | zalloc_cpumask_var(&cpus, GFP_ATOMIC); |
Rusty Russell | 6ef7a1b | 2008-12-08 20:28:04 +1030 | [diff] [blame] | 167 | |
Xiao Guangrong | 3cba413 | 2011-01-12 15:41:22 +0800 | [diff] [blame] | 168 | me = get_cpu(); |
Gleb Natapov | 988a2ca | 2009-06-09 15:56:29 +0300 | [diff] [blame] | 169 | kvm_for_each_vcpu(i, vcpu, kvm) { |
Xiao Guangrong | 3cba413 | 2011-01-12 15:41:22 +0800 | [diff] [blame] | 170 | kvm_make_request(req, vcpu); |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 171 | cpu = vcpu->cpu; |
Xiao Guangrong | 6b7e2d0 | 2011-01-12 15:40:31 +0800 | [diff] [blame] | 172 | |
| 173 | /* Set ->requests bit before we read ->mode */ |
| 174 | smp_mb(); |
| 175 | |
| 176 | if (cpus != NULL && cpu != -1 && cpu != me && |
| 177 | kvm_vcpu_exiting_guest_mode(vcpu) != OUTSIDE_GUEST_MODE) |
Rusty Russell | 6ef7a1b | 2008-12-08 20:28:04 +1030 | [diff] [blame] | 178 | cpumask_set_cpu(cpu, cpus); |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 179 | } |
Rusty Russell | 6ef7a1b | 2008-12-08 20:28:04 +1030 | [diff] [blame] | 180 | if (unlikely(cpus == NULL)) |
| 181 | smp_call_function_many(cpu_online_mask, ack_flush, NULL, 1); |
| 182 | else if (!cpumask_empty(cpus)) |
| 183 | smp_call_function_many(cpus, ack_flush, NULL, 1); |
| 184 | else |
| 185 | called = false; |
Xiao Guangrong | 3cba413 | 2011-01-12 15:41:22 +0800 | [diff] [blame] | 186 | put_cpu(); |
Rusty Russell | 6ef7a1b | 2008-12-08 20:28:04 +1030 | [diff] [blame] | 187 | free_cpumask_var(cpus); |
Rusty Russell | 4984689 | 2008-12-08 20:26:24 +1030 | [diff] [blame] | 188 | return called; |
| 189 | } |
| 190 | |
Mario Smarduch | a6d5101 | 2015-01-15 15:58:52 -0800 | [diff] [blame] | 191 | #ifndef CONFIG_HAVE_KVM_ARCH_TLB_FLUSH_ALL |
Rusty Russell | 4984689 | 2008-12-08 20:26:24 +1030 | [diff] [blame] | 192 | void kvm_flush_remote_tlbs(struct kvm *kvm) |
| 193 | { |
Xiao Guangrong | a086f6a | 2014-04-17 17:06:12 +0800 | [diff] [blame] | 194 | long dirty_count = kvm->tlbs_dirty; |
| 195 | |
| 196 | smp_mb(); |
Tang Chen | 445b823 | 2014-09-24 15:57:55 +0800 | [diff] [blame] | 197 | if (kvm_make_all_cpus_request(kvm, KVM_REQ_TLB_FLUSH)) |
Rusty Russell | 4984689 | 2008-12-08 20:26:24 +1030 | [diff] [blame] | 198 | ++kvm->stat.remote_tlb_flush; |
Xiao Guangrong | a086f6a | 2014-04-17 17:06:12 +0800 | [diff] [blame] | 199 | cmpxchg(&kvm->tlbs_dirty, dirty_count, 0); |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 200 | } |
Aneesh Kumar K.V | 2ba9f0d | 2013-10-07 22:17:59 +0530 | [diff] [blame] | 201 | EXPORT_SYMBOL_GPL(kvm_flush_remote_tlbs); |
Mario Smarduch | a6d5101 | 2015-01-15 15:58:52 -0800 | [diff] [blame] | 202 | #endif |
Avi Kivity | d9e368d | 2007-06-07 19:18:30 +0300 | [diff] [blame] | 203 | |
Marcelo Tosatti | 2e53d63 | 2008-02-20 14:47:24 -0500 | [diff] [blame] | 204 | void kvm_reload_remote_mmus(struct kvm *kvm) |
| 205 | { |
Tang Chen | 445b823 | 2014-09-24 15:57:55 +0800 | [diff] [blame] | 206 | kvm_make_all_cpus_request(kvm, KVM_REQ_MMU_RELOAD); |
Marcelo Tosatti | 2e53d63 | 2008-02-20 14:47:24 -0500 | [diff] [blame] | 207 | } |
| 208 | |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 209 | int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id) |
| 210 | { |
| 211 | struct page *page; |
| 212 | int r; |
| 213 | |
| 214 | mutex_init(&vcpu->mutex); |
| 215 | vcpu->cpu = -1; |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 216 | vcpu->kvm = kvm; |
| 217 | vcpu->vcpu_id = id; |
Rik van Riel | 34bb10b | 2011-02-01 09:52:41 -0500 | [diff] [blame] | 218 | vcpu->pid = NULL; |
Marcelo Tosatti | 8577370 | 2016-02-19 09:46:39 +0100 | [diff] [blame] | 219 | init_swait_queue_head(&vcpu->wq); |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 220 | kvm_async_pf_vcpu_init(vcpu); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 221 | |
Feng Wu | bf9f6ac | 2015-09-18 22:29:55 +0800 | [diff] [blame] | 222 | vcpu->pre_pcpu = -1; |
| 223 | INIT_LIST_HEAD(&vcpu->blocked_vcpu_list); |
| 224 | |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 225 | page = alloc_page(GFP_KERNEL | __GFP_ZERO); |
| 226 | if (!page) { |
| 227 | r = -ENOMEM; |
| 228 | goto fail; |
| 229 | } |
| 230 | vcpu->run = page_address(page); |
| 231 | |
Raghavendra K T | 4c08849 | 2012-07-18 19:07:46 +0530 | [diff] [blame] | 232 | kvm_vcpu_set_in_spin_loop(vcpu, false); |
| 233 | kvm_vcpu_set_dy_eligible(vcpu, false); |
Raghavendra K T | 3a08a8f | 2013-03-04 23:32:07 +0530 | [diff] [blame] | 234 | vcpu->preempted = false; |
Raghavendra K T | 4c08849 | 2012-07-18 19:07:46 +0530 | [diff] [blame] | 235 | |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 236 | r = kvm_arch_vcpu_init(vcpu); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 237 | if (r < 0) |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 238 | goto fail_free_run; |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 239 | return 0; |
| 240 | |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 241 | fail_free_run: |
| 242 | free_page((unsigned long)vcpu->run); |
| 243 | fail: |
Rusty Russell | 76fafa5 | 2007-10-08 10:50:48 +1000 | [diff] [blame] | 244 | return r; |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 245 | } |
| 246 | EXPORT_SYMBOL_GPL(kvm_vcpu_init); |
| 247 | |
| 248 | void kvm_vcpu_uninit(struct kvm_vcpu *vcpu) |
| 249 | { |
Rik van Riel | 34bb10b | 2011-02-01 09:52:41 -0500 | [diff] [blame] | 250 | put_pid(vcpu->pid); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 251 | kvm_arch_vcpu_uninit(vcpu); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 252 | free_page((unsigned long)vcpu->run); |
| 253 | } |
| 254 | EXPORT_SYMBOL_GPL(kvm_vcpu_uninit); |
| 255 | |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 256 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) |
| 257 | static inline struct kvm *mmu_notifier_to_kvm(struct mmu_notifier *mn) |
| 258 | { |
| 259 | return container_of(mn, struct kvm, mmu_notifier); |
| 260 | } |
| 261 | |
| 262 | static void kvm_mmu_notifier_invalidate_page(struct mmu_notifier *mn, |
| 263 | struct mm_struct *mm, |
| 264 | unsigned long address) |
| 265 | { |
| 266 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 267 | int need_tlb_flush, idx; |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 268 | |
| 269 | /* |
| 270 | * When ->invalidate_page runs, the linux pte has been zapped |
| 271 | * already but the page is still allocated until |
| 272 | * ->invalidate_page returns. So if we increase the sequence |
| 273 | * here the kvm page fault will notice if the spte can't be |
| 274 | * established because the page is going to be freed. If |
| 275 | * instead the kvm page fault establishes the spte before |
| 276 | * ->invalidate_page runs, kvm_unmap_hva will release it |
| 277 | * before returning. |
| 278 | * |
| 279 | * The sequence increase only need to be seen at spin_unlock |
| 280 | * time, and not at spin_lock time. |
| 281 | * |
| 282 | * Increasing the sequence after the spin_unlock would be |
| 283 | * unsafe because the kvm page fault could then establish the |
| 284 | * pte after kvm_unmap_hva returned, without noticing the page |
| 285 | * is going to be freed. |
| 286 | */ |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 287 | idx = srcu_read_lock(&kvm->srcu); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 288 | spin_lock(&kvm->mmu_lock); |
Takuya Yoshikawa | 565f3be | 2012-02-10 15:28:31 +0900 | [diff] [blame] | 289 | |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 290 | kvm->mmu_notifier_seq++; |
Xiao Guangrong | a4ee1ca | 2010-11-23 11:13:00 +0800 | [diff] [blame] | 291 | need_tlb_flush = kvm_unmap_hva(kvm, address) | kvm->tlbs_dirty; |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 292 | /* we've to flush the tlb before the pages can be freed */ |
| 293 | if (need_tlb_flush) |
| 294 | kvm_flush_remote_tlbs(kvm); |
| 295 | |
Takuya Yoshikawa | 565f3be | 2012-02-10 15:28:31 +0900 | [diff] [blame] | 296 | spin_unlock(&kvm->mmu_lock); |
Tang Chen | fe71557 | 2014-09-24 15:57:57 +0800 | [diff] [blame] | 297 | |
| 298 | kvm_arch_mmu_notifier_invalidate_page(kvm, address); |
| 299 | |
Takuya Yoshikawa | 565f3be | 2012-02-10 15:28:31 +0900 | [diff] [blame] | 300 | srcu_read_unlock(&kvm->srcu, idx); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 301 | } |
| 302 | |
Izik Eidus | 3da0dd4 | 2009-09-23 21:47:18 +0300 | [diff] [blame] | 303 | static void kvm_mmu_notifier_change_pte(struct mmu_notifier *mn, |
| 304 | struct mm_struct *mm, |
| 305 | unsigned long address, |
| 306 | pte_t pte) |
| 307 | { |
| 308 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 309 | int idx; |
Izik Eidus | 3da0dd4 | 2009-09-23 21:47:18 +0300 | [diff] [blame] | 310 | |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 311 | idx = srcu_read_lock(&kvm->srcu); |
Izik Eidus | 3da0dd4 | 2009-09-23 21:47:18 +0300 | [diff] [blame] | 312 | spin_lock(&kvm->mmu_lock); |
| 313 | kvm->mmu_notifier_seq++; |
| 314 | kvm_set_spte_hva(kvm, address, pte); |
| 315 | spin_unlock(&kvm->mmu_lock); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 316 | srcu_read_unlock(&kvm->srcu, idx); |
Izik Eidus | 3da0dd4 | 2009-09-23 21:47:18 +0300 | [diff] [blame] | 317 | } |
| 318 | |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 319 | static void kvm_mmu_notifier_invalidate_range_start(struct mmu_notifier *mn, |
| 320 | struct mm_struct *mm, |
| 321 | unsigned long start, |
| 322 | unsigned long end) |
| 323 | { |
| 324 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 325 | int need_tlb_flush = 0, idx; |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 326 | |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 327 | idx = srcu_read_lock(&kvm->srcu); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 328 | spin_lock(&kvm->mmu_lock); |
| 329 | /* |
| 330 | * The count increase must become visible at unlock time as no |
| 331 | * spte can be established without taking the mmu_lock and |
| 332 | * count is also read inside the mmu_lock critical section. |
| 333 | */ |
| 334 | kvm->mmu_notifier_count++; |
Takuya Yoshikawa | b3ae209 | 2012-07-02 17:56:33 +0900 | [diff] [blame] | 335 | need_tlb_flush = kvm_unmap_hva_range(kvm, start, end); |
Xiao Guangrong | a4ee1ca | 2010-11-23 11:13:00 +0800 | [diff] [blame] | 336 | need_tlb_flush |= kvm->tlbs_dirty; |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 337 | /* we've to flush the tlb before the pages can be freed */ |
| 338 | if (need_tlb_flush) |
| 339 | kvm_flush_remote_tlbs(kvm); |
Takuya Yoshikawa | 565f3be | 2012-02-10 15:28:31 +0900 | [diff] [blame] | 340 | |
| 341 | spin_unlock(&kvm->mmu_lock); |
| 342 | srcu_read_unlock(&kvm->srcu, idx); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 343 | } |
| 344 | |
| 345 | static void kvm_mmu_notifier_invalidate_range_end(struct mmu_notifier *mn, |
| 346 | struct mm_struct *mm, |
| 347 | unsigned long start, |
| 348 | unsigned long end) |
| 349 | { |
| 350 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
| 351 | |
| 352 | spin_lock(&kvm->mmu_lock); |
| 353 | /* |
| 354 | * This sequence increase will notify the kvm page fault that |
| 355 | * the page that is going to be mapped in the spte could have |
| 356 | * been freed. |
| 357 | */ |
| 358 | kvm->mmu_notifier_seq++; |
Paul Mackerras | a355aa5 | 2011-12-12 12:37:21 +0000 | [diff] [blame] | 359 | smp_wmb(); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 360 | /* |
| 361 | * The above sequence increase must be visible before the |
Paul Mackerras | a355aa5 | 2011-12-12 12:37:21 +0000 | [diff] [blame] | 362 | * below count decrease, which is ensured by the smp_wmb above |
| 363 | * in conjunction with the smp_rmb in mmu_notifier_retry(). |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 364 | */ |
| 365 | kvm->mmu_notifier_count--; |
| 366 | spin_unlock(&kvm->mmu_lock); |
| 367 | |
| 368 | BUG_ON(kvm->mmu_notifier_count < 0); |
| 369 | } |
| 370 | |
| 371 | static int kvm_mmu_notifier_clear_flush_young(struct mmu_notifier *mn, |
| 372 | struct mm_struct *mm, |
Andres Lagar-Cavilla | 5712846 | 2014-09-22 14:54:42 -0700 | [diff] [blame] | 373 | unsigned long start, |
| 374 | unsigned long end) |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 375 | { |
| 376 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 377 | int young, idx; |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 378 | |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 379 | idx = srcu_read_lock(&kvm->srcu); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 380 | spin_lock(&kvm->mmu_lock); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 381 | |
Andres Lagar-Cavilla | 5712846 | 2014-09-22 14:54:42 -0700 | [diff] [blame] | 382 | young = kvm_age_hva(kvm, start, end); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 383 | if (young) |
| 384 | kvm_flush_remote_tlbs(kvm); |
| 385 | |
Takuya Yoshikawa | 565f3be | 2012-02-10 15:28:31 +0900 | [diff] [blame] | 386 | spin_unlock(&kvm->mmu_lock); |
| 387 | srcu_read_unlock(&kvm->srcu, idx); |
| 388 | |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 389 | return young; |
| 390 | } |
| 391 | |
Vladimir Davydov | 1d7715c | 2015-09-09 15:35:41 -0700 | [diff] [blame] | 392 | static int kvm_mmu_notifier_clear_young(struct mmu_notifier *mn, |
| 393 | struct mm_struct *mm, |
| 394 | unsigned long start, |
| 395 | unsigned long end) |
| 396 | { |
| 397 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
| 398 | int young, idx; |
| 399 | |
| 400 | idx = srcu_read_lock(&kvm->srcu); |
| 401 | spin_lock(&kvm->mmu_lock); |
| 402 | /* |
| 403 | * Even though we do not flush TLB, this will still adversely |
| 404 | * affect performance on pre-Haswell Intel EPT, where there is |
| 405 | * no EPT Access Bit to clear so that we have to tear down EPT |
| 406 | * tables instead. If we find this unacceptable, we can always |
| 407 | * add a parameter to kvm_age_hva so that it effectively doesn't |
| 408 | * do anything on clear_young. |
| 409 | * |
| 410 | * Also note that currently we never issue secondary TLB flushes |
| 411 | * from clear_young, leaving this job up to the regular system |
| 412 | * cadence. If we find this inaccurate, we might come up with a |
| 413 | * more sophisticated heuristic later. |
| 414 | */ |
| 415 | young = kvm_age_hva(kvm, start, end); |
| 416 | spin_unlock(&kvm->mmu_lock); |
| 417 | srcu_read_unlock(&kvm->srcu, idx); |
| 418 | |
| 419 | return young; |
| 420 | } |
| 421 | |
Andrea Arcangeli | 8ee5382 | 2011-01-13 15:47:10 -0800 | [diff] [blame] | 422 | static int kvm_mmu_notifier_test_young(struct mmu_notifier *mn, |
| 423 | struct mm_struct *mm, |
| 424 | unsigned long address) |
| 425 | { |
| 426 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
| 427 | int young, idx; |
| 428 | |
| 429 | idx = srcu_read_lock(&kvm->srcu); |
| 430 | spin_lock(&kvm->mmu_lock); |
| 431 | young = kvm_test_age_hva(kvm, address); |
| 432 | spin_unlock(&kvm->mmu_lock); |
| 433 | srcu_read_unlock(&kvm->srcu, idx); |
| 434 | |
| 435 | return young; |
| 436 | } |
| 437 | |
Marcelo Tosatti | 85db06e | 2008-12-10 21:23:26 +0100 | [diff] [blame] | 438 | static void kvm_mmu_notifier_release(struct mmu_notifier *mn, |
| 439 | struct mm_struct *mm) |
| 440 | { |
| 441 | struct kvm *kvm = mmu_notifier_to_kvm(mn); |
Lai Jiangshan | eda2bed | 2010-04-20 14:29:29 +0800 | [diff] [blame] | 442 | int idx; |
| 443 | |
| 444 | idx = srcu_read_lock(&kvm->srcu); |
Marcelo Tosatti | 2df72e9 | 2012-08-24 15:54:57 -0300 | [diff] [blame] | 445 | kvm_arch_flush_shadow_all(kvm); |
Lai Jiangshan | eda2bed | 2010-04-20 14:29:29 +0800 | [diff] [blame] | 446 | srcu_read_unlock(&kvm->srcu, idx); |
Marcelo Tosatti | 85db06e | 2008-12-10 21:23:26 +0100 | [diff] [blame] | 447 | } |
| 448 | |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 449 | static const struct mmu_notifier_ops kvm_mmu_notifier_ops = { |
| 450 | .invalidate_page = kvm_mmu_notifier_invalidate_page, |
| 451 | .invalidate_range_start = kvm_mmu_notifier_invalidate_range_start, |
| 452 | .invalidate_range_end = kvm_mmu_notifier_invalidate_range_end, |
| 453 | .clear_flush_young = kvm_mmu_notifier_clear_flush_young, |
Vladimir Davydov | 1d7715c | 2015-09-09 15:35:41 -0700 | [diff] [blame] | 454 | .clear_young = kvm_mmu_notifier_clear_young, |
Andrea Arcangeli | 8ee5382 | 2011-01-13 15:47:10 -0800 | [diff] [blame] | 455 | .test_young = kvm_mmu_notifier_test_young, |
Izik Eidus | 3da0dd4 | 2009-09-23 21:47:18 +0300 | [diff] [blame] | 456 | .change_pte = kvm_mmu_notifier_change_pte, |
Marcelo Tosatti | 85db06e | 2008-12-10 21:23:26 +0100 | [diff] [blame] | 457 | .release = kvm_mmu_notifier_release, |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 458 | }; |
Avi Kivity | 4c07b0a | 2009-12-20 14:54:04 +0200 | [diff] [blame] | 459 | |
| 460 | static int kvm_init_mmu_notifier(struct kvm *kvm) |
| 461 | { |
| 462 | kvm->mmu_notifier.ops = &kvm_mmu_notifier_ops; |
| 463 | return mmu_notifier_register(&kvm->mmu_notifier, current->mm); |
| 464 | } |
| 465 | |
| 466 | #else /* !(CONFIG_MMU_NOTIFIER && KVM_ARCH_WANT_MMU_NOTIFIER) */ |
| 467 | |
| 468 | static int kvm_init_mmu_notifier(struct kvm *kvm) |
| 469 | { |
| 470 | return 0; |
| 471 | } |
| 472 | |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 473 | #endif /* CONFIG_MMU_NOTIFIER && KVM_ARCH_WANT_MMU_NOTIFIER */ |
| 474 | |
Paolo Bonzini | a47d2b0 | 2015-05-17 11:41:37 +0200 | [diff] [blame] | 475 | static struct kvm_memslots *kvm_alloc_memslots(void) |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 476 | { |
| 477 | int i; |
Paolo Bonzini | a47d2b0 | 2015-05-17 11:41:37 +0200 | [diff] [blame] | 478 | struct kvm_memslots *slots; |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 479 | |
Paolo Bonzini | a47d2b0 | 2015-05-17 11:41:37 +0200 | [diff] [blame] | 480 | slots = kvm_kvzalloc(sizeof(struct kvm_memslots)); |
| 481 | if (!slots) |
| 482 | return NULL; |
| 483 | |
| 484 | /* |
| 485 | * Init kvm generation close to the maximum to easily test the |
| 486 | * code of handling generation number wrap-around. |
| 487 | */ |
| 488 | slots->generation = -150; |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 489 | for (i = 0; i < KVM_MEM_SLOTS_NUM; i++) |
Xiao Guangrong | f85e2cb | 2011-11-24 17:41:54 +0800 | [diff] [blame] | 490 | slots->id_to_index[i] = slots->memslots[i].id = i; |
Paolo Bonzini | a47d2b0 | 2015-05-17 11:41:37 +0200 | [diff] [blame] | 491 | |
| 492 | return slots; |
| 493 | } |
| 494 | |
| 495 | static void kvm_destroy_dirty_bitmap(struct kvm_memory_slot *memslot) |
| 496 | { |
| 497 | if (!memslot->dirty_bitmap) |
| 498 | return; |
| 499 | |
| 500 | kvfree(memslot->dirty_bitmap); |
| 501 | memslot->dirty_bitmap = NULL; |
| 502 | } |
| 503 | |
| 504 | /* |
| 505 | * Free any memory in @free but not in @dont. |
| 506 | */ |
| 507 | static void kvm_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free, |
| 508 | struct kvm_memory_slot *dont) |
| 509 | { |
| 510 | if (!dont || free->dirty_bitmap != dont->dirty_bitmap) |
| 511 | kvm_destroy_dirty_bitmap(free); |
| 512 | |
| 513 | kvm_arch_free_memslot(kvm, free, dont); |
| 514 | |
| 515 | free->npages = 0; |
| 516 | } |
| 517 | |
| 518 | static void kvm_free_memslots(struct kvm *kvm, struct kvm_memslots *slots) |
| 519 | { |
| 520 | struct kvm_memory_slot *memslot; |
| 521 | |
| 522 | if (!slots) |
| 523 | return; |
| 524 | |
| 525 | kvm_for_each_memslot(memslot, slots) |
| 526 | kvm_free_memslot(kvm, memslot, NULL); |
| 527 | |
| 528 | kvfree(slots); |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 529 | } |
| 530 | |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 531 | static struct kvm *kvm_create_vm(unsigned long type) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 532 | { |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 533 | int r, i; |
| 534 | struct kvm *kvm = kvm_arch_alloc_vm(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 535 | |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 536 | if (!kvm) |
| 537 | return ERR_PTR(-ENOMEM); |
| 538 | |
Paolo Bonzini | e9ad4ec | 2016-03-21 10:15:25 +0100 | [diff] [blame] | 539 | spin_lock_init(&kvm->mmu_lock); |
| 540 | atomic_inc(¤t->mm->mm_count); |
| 541 | kvm->mm = current->mm; |
| 542 | kvm_eventfd_init(kvm); |
| 543 | mutex_init(&kvm->lock); |
| 544 | mutex_init(&kvm->irq_lock); |
| 545 | mutex_init(&kvm->slots_lock); |
| 546 | atomic_set(&kvm->users_count, 1); |
| 547 | INIT_LIST_HEAD(&kvm->devices); |
| 548 | |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 549 | r = kvm_arch_init_vm(kvm, type); |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 550 | if (r) |
Christian Borntraeger | 719d93c | 2014-01-16 13:44:20 +0100 | [diff] [blame] | 551 | goto out_err_no_disable; |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 552 | |
| 553 | r = hardware_enable_all(); |
| 554 | if (r) |
Christian Borntraeger | 719d93c | 2014-01-16 13:44:20 +0100 | [diff] [blame] | 555 | goto out_err_no_disable; |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 556 | |
Paolo Bonzini | c77dcac | 2014-08-06 14:24:45 +0200 | [diff] [blame] | 557 | #ifdef CONFIG_HAVE_KVM_IRQFD |
Gleb Natapov | 136bdfe | 2009-08-24 11:54:23 +0300 | [diff] [blame] | 558 | INIT_HLIST_HEAD(&kvm->irq_ack_notifier_list); |
Avi Kivity | 75858a8 | 2009-01-04 17:10:50 +0200 | [diff] [blame] | 559 | #endif |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 560 | |
Alex Williamson | 1e702d9 | 2012-12-10 10:33:32 -0700 | [diff] [blame] | 561 | BUILD_BUG_ON(KVM_MEM_SLOTS_NUM > SHRT_MAX); |
| 562 | |
Marcelo Tosatti | 46a26bf | 2009-12-23 14:35:16 -0200 | [diff] [blame] | 563 | r = -ENOMEM; |
Paolo Bonzini | f481b06 | 2015-05-17 17:30:37 +0200 | [diff] [blame] | 564 | for (i = 0; i < KVM_ADDRESS_SPACE_NUM; i++) { |
| 565 | kvm->memslots[i] = kvm_alloc_memslots(); |
| 566 | if (!kvm->memslots[i]) |
| 567 | goto out_err_no_srcu; |
| 568 | } |
Paolo Bonzini | 00f034a | 2014-08-20 14:29:21 +0200 | [diff] [blame] | 569 | |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 570 | if (init_srcu_struct(&kvm->srcu)) |
Christian Borntraeger | 719d93c | 2014-01-16 13:44:20 +0100 | [diff] [blame] | 571 | goto out_err_no_srcu; |
| 572 | if (init_srcu_struct(&kvm->irq_srcu)) |
| 573 | goto out_err_no_irq_srcu; |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 574 | for (i = 0; i < KVM_NR_BUSES; i++) { |
| 575 | kvm->buses[i] = kzalloc(sizeof(struct kvm_io_bus), |
| 576 | GFP_KERNEL); |
Jan Kiszka | 57e7fbe | 2010-11-09 12:42:12 +0100 | [diff] [blame] | 577 | if (!kvm->buses[i]) |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 578 | goto out_err; |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 579 | } |
Mike Waychison | 74b5c5b | 2011-06-03 13:04:53 -0700 | [diff] [blame] | 580 | |
Mike Waychison | 74b5c5b | 2011-06-03 13:04:53 -0700 | [diff] [blame] | 581 | r = kvm_init_mmu_notifier(kvm); |
| 582 | if (r) |
| 583 | goto out_err; |
| 584 | |
Paolo Bonzini | 2f303b7 | 2013-09-25 13:53:07 +0200 | [diff] [blame] | 585 | spin_lock(&kvm_lock); |
Rusty Russell | 5e58cfe | 2007-07-23 17:08:21 +1000 | [diff] [blame] | 586 | list_add(&kvm->vm_list, &vm_list); |
Paolo Bonzini | 2f303b7 | 2013-09-25 13:53:07 +0200 | [diff] [blame] | 587 | spin_unlock(&kvm_lock); |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 588 | |
Peter Zijlstra | 2ecd9d2 | 2015-07-03 18:53:58 +0200 | [diff] [blame] | 589 | preempt_notifier_inc(); |
| 590 | |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 591 | return kvm; |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 592 | |
| 593 | out_err: |
Christian Borntraeger | 719d93c | 2014-01-16 13:44:20 +0100 | [diff] [blame] | 594 | cleanup_srcu_struct(&kvm->irq_srcu); |
| 595 | out_err_no_irq_srcu: |
Jan Kiszka | 57e7fbe | 2010-11-09 12:42:12 +0100 | [diff] [blame] | 596 | cleanup_srcu_struct(&kvm->srcu); |
Christian Borntraeger | 719d93c | 2014-01-16 13:44:20 +0100 | [diff] [blame] | 597 | out_err_no_srcu: |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 598 | hardware_disable_all(); |
Christian Borntraeger | 719d93c | 2014-01-16 13:44:20 +0100 | [diff] [blame] | 599 | out_err_no_disable: |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 600 | for (i = 0; i < KVM_NR_BUSES; i++) |
| 601 | kfree(kvm->buses[i]); |
Paolo Bonzini | f481b06 | 2015-05-17 17:30:37 +0200 | [diff] [blame] | 602 | for (i = 0; i < KVM_ADDRESS_SPACE_NUM; i++) |
| 603 | kvm_free_memslots(kvm, kvm->memslots[i]); |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 604 | kvm_arch_free_vm(kvm); |
Paolo Bonzini | e9ad4ec | 2016-03-21 10:15:25 +0100 | [diff] [blame] | 605 | mmdrop(current->mm); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 606 | return ERR_PTR(r); |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 607 | } |
| 608 | |
Takuya Yoshikawa | 92eca8f | 2012-05-20 13:13:28 +0900 | [diff] [blame] | 609 | /* |
| 610 | * Avoid using vmalloc for a small buffer. |
| 611 | * Should not be used when the size is statically known. |
| 612 | */ |
Takuya Yoshikawa | c1a7b32 | 2012-05-20 13:15:07 +0900 | [diff] [blame] | 613 | void *kvm_kvzalloc(unsigned long size) |
Takuya Yoshikawa | 92eca8f | 2012-05-20 13:13:28 +0900 | [diff] [blame] | 614 | { |
| 615 | if (size > PAGE_SIZE) |
| 616 | return vzalloc(size); |
| 617 | else |
| 618 | return kzalloc(size, GFP_KERNEL); |
| 619 | } |
| 620 | |
Scott Wood | 07f0a7b | 2013-04-25 14:11:23 +0000 | [diff] [blame] | 621 | static void kvm_destroy_devices(struct kvm *kvm) |
| 622 | { |
Geliang Tang | e6e3b5a | 2016-01-01 19:47:12 +0800 | [diff] [blame] | 623 | struct kvm_device *dev, *tmp; |
Scott Wood | 07f0a7b | 2013-04-25 14:11:23 +0000 | [diff] [blame] | 624 | |
Geliang Tang | e6e3b5a | 2016-01-01 19:47:12 +0800 | [diff] [blame] | 625 | list_for_each_entry_safe(dev, tmp, &kvm->devices, vm_node) { |
| 626 | list_del(&dev->vm_node); |
Scott Wood | 07f0a7b | 2013-04-25 14:11:23 +0000 | [diff] [blame] | 627 | dev->ops->destroy(dev); |
| 628 | } |
| 629 | } |
| 630 | |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 631 | static void kvm_destroy_vm(struct kvm *kvm) |
| 632 | { |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 633 | int i; |
Avi Kivity | 6d4e4c4 | 2007-11-21 16:41:05 +0200 | [diff] [blame] | 634 | struct mm_struct *mm = kvm->mm; |
| 635 | |
Sheng Yang | ad8ba2c | 2009-01-06 10:03:02 +0800 | [diff] [blame] | 636 | kvm_arch_sync_events(kvm); |
Paolo Bonzini | 2f303b7 | 2013-09-25 13:53:07 +0200 | [diff] [blame] | 637 | spin_lock(&kvm_lock); |
Avi Kivity | 133de90 | 2007-02-12 00:54:44 -0800 | [diff] [blame] | 638 | list_del(&kvm->vm_list); |
Paolo Bonzini | 2f303b7 | 2013-09-25 13:53:07 +0200 | [diff] [blame] | 639 | spin_unlock(&kvm_lock); |
Avi Kivity | 399ec80 | 2008-11-19 13:58:46 +0200 | [diff] [blame] | 640 | kvm_free_irq_routing(kvm); |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 641 | for (i = 0; i < KVM_NR_BUSES; i++) |
| 642 | kvm_io_bus_destroy(kvm->buses[i]); |
Avi Kivity | 980da6c | 2009-12-20 15:13:43 +0200 | [diff] [blame] | 643 | kvm_coalesced_mmio_free(kvm); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 644 | #if defined(CONFIG_MMU_NOTIFIER) && defined(KVM_ARCH_WANT_MMU_NOTIFIER) |
| 645 | mmu_notifier_unregister(&kvm->mmu_notifier, kvm->mm); |
Gleb Natapov | f00be0c | 2009-03-19 12:20:36 +0200 | [diff] [blame] | 646 | #else |
Marcelo Tosatti | 2df72e9 | 2012-08-24 15:54:57 -0300 | [diff] [blame] | 647 | kvm_arch_flush_shadow_all(kvm); |
Andrea Arcangeli | e930bff | 2008-07-25 16:24:52 +0200 | [diff] [blame] | 648 | #endif |
Zhang Xiantao | d19a9cd | 2007-11-18 18:43:45 +0800 | [diff] [blame] | 649 | kvm_arch_destroy_vm(kvm); |
Scott Wood | 07f0a7b | 2013-04-25 14:11:23 +0000 | [diff] [blame] | 650 | kvm_destroy_devices(kvm); |
Paolo Bonzini | f481b06 | 2015-05-17 17:30:37 +0200 | [diff] [blame] | 651 | for (i = 0; i < KVM_ADDRESS_SPACE_NUM; i++) |
| 652 | kvm_free_memslots(kvm, kvm->memslots[i]); |
Paolo Bonzini | 820b3fc | 2014-06-03 13:44:17 +0200 | [diff] [blame] | 653 | cleanup_srcu_struct(&kvm->irq_srcu); |
Jan Kiszka | d89f5ef | 2010-11-09 17:02:49 +0100 | [diff] [blame] | 654 | cleanup_srcu_struct(&kvm->srcu); |
| 655 | kvm_arch_free_vm(kvm); |
Peter Zijlstra | 2ecd9d2 | 2015-07-03 18:53:58 +0200 | [diff] [blame] | 656 | preempt_notifier_dec(); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 657 | hardware_disable_all(); |
Avi Kivity | 6d4e4c4 | 2007-11-21 16:41:05 +0200 | [diff] [blame] | 658 | mmdrop(mm); |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 659 | } |
| 660 | |
Izik Eidus | d39f13b | 2008-03-30 16:01:25 +0300 | [diff] [blame] | 661 | void kvm_get_kvm(struct kvm *kvm) |
| 662 | { |
| 663 | atomic_inc(&kvm->users_count); |
| 664 | } |
| 665 | EXPORT_SYMBOL_GPL(kvm_get_kvm); |
| 666 | |
| 667 | void kvm_put_kvm(struct kvm *kvm) |
| 668 | { |
| 669 | if (atomic_dec_and_test(&kvm->users_count)) |
| 670 | kvm_destroy_vm(kvm); |
| 671 | } |
| 672 | EXPORT_SYMBOL_GPL(kvm_put_kvm); |
| 673 | |
| 674 | |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 675 | static int kvm_vm_release(struct inode *inode, struct file *filp) |
| 676 | { |
| 677 | struct kvm *kvm = filp->private_data; |
| 678 | |
Gregory Haskins | 721eecb | 2009-05-20 10:30:49 -0400 | [diff] [blame] | 679 | kvm_irqfd_release(kvm); |
| 680 | |
Izik Eidus | d39f13b | 2008-03-30 16:01:25 +0300 | [diff] [blame] | 681 | kvm_put_kvm(kvm); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 682 | return 0; |
| 683 | } |
| 684 | |
Takuya Yoshikawa | 515a012 | 2010-10-27 18:23:54 +0900 | [diff] [blame] | 685 | /* |
| 686 | * Allocation size is twice as large as the actual dirty bitmap size. |
Takuya Yoshikawa | 93474b2 | 2012-03-01 19:34:45 +0900 | [diff] [blame] | 687 | * 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] | 688 | */ |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 689 | static int kvm_create_dirty_bitmap(struct kvm_memory_slot *memslot) |
| 690 | { |
Takuya Yoshikawa | 515a012 | 2010-10-27 18:23:54 +0900 | [diff] [blame] | 691 | unsigned long dirty_bytes = 2 * kvm_dirty_bitmap_bytes(memslot); |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 692 | |
Takuya Yoshikawa | 92eca8f | 2012-05-20 13:13:28 +0900 | [diff] [blame] | 693 | memslot->dirty_bitmap = kvm_kvzalloc(dirty_bytes); |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 694 | if (!memslot->dirty_bitmap) |
| 695 | return -ENOMEM; |
| 696 | |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 697 | return 0; |
| 698 | } |
| 699 | |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 700 | /* |
Igor Mammedov | 0e60b07 | 2014-12-01 17:29:26 +0000 | [diff] [blame] | 701 | * Insert memslot and re-sort memslots based on their GFN, |
| 702 | * so binary search could be used to lookup GFN. |
| 703 | * Sorting algorithm takes advantage of having initially |
| 704 | * sorted array and known changed memslot position. |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 705 | */ |
Paolo Bonzini | 5cc1502 | 2014-11-14 10:55:31 +0100 | [diff] [blame] | 706 | static void update_memslots(struct kvm_memslots *slots, |
| 707 | struct kvm_memory_slot *new) |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 708 | { |
Paolo Bonzini | 8593176c | 2014-11-14 10:22:07 +0100 | [diff] [blame] | 709 | int id = new->id; |
| 710 | int i = slots->id_to_index[id]; |
Igor Mammedov | 063584d | 2014-11-13 23:00:13 +0000 | [diff] [blame] | 711 | struct kvm_memory_slot *mslots = slots->memslots; |
Xiao Guangrong | f85e2cb | 2011-11-24 17:41:54 +0800 | [diff] [blame] | 712 | |
Paolo Bonzini | 8593176c | 2014-11-14 10:22:07 +0100 | [diff] [blame] | 713 | WARN_ON(mslots[i].id != id); |
Igor Mammedov | 9c1a5d38 | 2014-12-01 17:29:27 +0000 | [diff] [blame] | 714 | if (!new->npages) { |
Paolo Bonzini | dbaff30 | 2014-12-27 21:08:16 +0100 | [diff] [blame] | 715 | WARN_ON(!mslots[i].npages); |
Igor Mammedov | 9c1a5d38 | 2014-12-01 17:29:27 +0000 | [diff] [blame] | 716 | if (mslots[i].npages) |
| 717 | slots->used_slots--; |
| 718 | } else { |
| 719 | if (!mslots[i].npages) |
| 720 | slots->used_slots++; |
| 721 | } |
Igor Mammedov | 0e60b07 | 2014-12-01 17:29:26 +0000 | [diff] [blame] | 722 | |
Igor Mammedov | 7f379cf | 2014-12-01 17:29:24 +0000 | [diff] [blame] | 723 | while (i < KVM_MEM_SLOTS_NUM - 1 && |
Igor Mammedov | 0e60b07 | 2014-12-01 17:29:26 +0000 | [diff] [blame] | 724 | new->base_gfn <= mslots[i + 1].base_gfn) { |
| 725 | if (!mslots[i + 1].npages) |
| 726 | break; |
Igor Mammedov | 7f379cf | 2014-12-01 17:29:24 +0000 | [diff] [blame] | 727 | mslots[i] = mslots[i + 1]; |
| 728 | slots->id_to_index[mslots[i].id] = i; |
| 729 | i++; |
| 730 | } |
Paolo Bonzini | efbeec7 | 2014-12-27 18:01:00 +0100 | [diff] [blame] | 731 | |
| 732 | /* |
| 733 | * The ">=" is needed when creating a slot with base_gfn == 0, |
| 734 | * so that it moves before all those with base_gfn == npages == 0. |
| 735 | * |
| 736 | * On the other hand, if new->npages is zero, the above loop has |
| 737 | * already left i pointing to the beginning of the empty part of |
| 738 | * mslots, and the ">=" would move the hole backwards in this |
| 739 | * case---which is wrong. So skip the loop when deleting a slot. |
| 740 | */ |
| 741 | if (new->npages) { |
| 742 | while (i > 0 && |
| 743 | new->base_gfn >= mslots[i - 1].base_gfn) { |
| 744 | mslots[i] = mslots[i - 1]; |
| 745 | slots->id_to_index[mslots[i].id] = i; |
| 746 | i--; |
| 747 | } |
Paolo Bonzini | dbaff30 | 2014-12-27 21:08:16 +0100 | [diff] [blame] | 748 | } else |
| 749 | WARN_ON_ONCE(i != slots->used_slots); |
Xiao Guangrong | f85e2cb | 2011-11-24 17:41:54 +0800 | [diff] [blame] | 750 | |
Paolo Bonzini | 8593176c | 2014-11-14 10:22:07 +0100 | [diff] [blame] | 751 | mslots[i] = *new; |
| 752 | slots->id_to_index[mslots[i].id] = i; |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 753 | } |
| 754 | |
Paolo Bonzini | 09170a4 | 2015-05-18 13:59:39 +0200 | [diff] [blame] | 755 | static int check_memory_region_flags(const struct kvm_userspace_memory_region *mem) |
Xiao Guangrong | a50d64d | 2012-08-21 10:58:13 +0800 | [diff] [blame] | 756 | { |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 757 | u32 valid_flags = KVM_MEM_LOG_DIRTY_PAGES; |
| 758 | |
Christoffer Dall | 0f8a4de | 2014-08-26 14:00:37 +0200 | [diff] [blame] | 759 | #ifdef __KVM_HAVE_READONLY_MEM |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 760 | valid_flags |= KVM_MEM_READONLY; |
| 761 | #endif |
| 762 | |
| 763 | if (mem->flags & ~valid_flags) |
Xiao Guangrong | a50d64d | 2012-08-21 10:58:13 +0800 | [diff] [blame] | 764 | return -EINVAL; |
| 765 | |
| 766 | return 0; |
| 767 | } |
| 768 | |
Gleb Natapov | 7ec4fb4 | 2012-12-24 17:49:30 +0200 | [diff] [blame] | 769 | static struct kvm_memslots *install_new_memslots(struct kvm *kvm, |
Paolo Bonzini | f481b06 | 2015-05-17 17:30:37 +0200 | [diff] [blame] | 770 | int as_id, struct kvm_memslots *slots) |
Gleb Natapov | 7ec4fb4 | 2012-12-24 17:49:30 +0200 | [diff] [blame] | 771 | { |
Paolo Bonzini | f481b06 | 2015-05-17 17:30:37 +0200 | [diff] [blame] | 772 | struct kvm_memslots *old_memslots = __kvm_memslots(kvm, as_id); |
Gleb Natapov | 7ec4fb4 | 2012-12-24 17:49:30 +0200 | [diff] [blame] | 773 | |
David Matlack | ee3d157 | 2014-08-18 15:46:06 -0700 | [diff] [blame] | 774 | /* |
| 775 | * Set the low bit in the generation, which disables SPTE caching |
| 776 | * until the end of synchronize_srcu_expedited. |
| 777 | */ |
| 778 | WARN_ON(old_memslots->generation & 1); |
| 779 | slots->generation = old_memslots->generation + 1; |
| 780 | |
Paolo Bonzini | f481b06 | 2015-05-17 17:30:37 +0200 | [diff] [blame] | 781 | rcu_assign_pointer(kvm->memslots[as_id], slots); |
Gleb Natapov | 7ec4fb4 | 2012-12-24 17:49:30 +0200 | [diff] [blame] | 782 | synchronize_srcu_expedited(&kvm->srcu); |
Takuya Yoshikawa | e59dbe0 | 2013-07-04 13:40:29 +0900 | [diff] [blame] | 783 | |
David Matlack | ee3d157 | 2014-08-18 15:46:06 -0700 | [diff] [blame] | 784 | /* |
| 785 | * Increment the new memslot generation a second time. This prevents |
| 786 | * vm exits that race with memslot updates from caching a memslot |
| 787 | * generation that will (potentially) be valid forever. |
| 788 | */ |
| 789 | slots->generation++; |
| 790 | |
Paolo Bonzini | 15f4601 | 2015-05-17 21:26:08 +0200 | [diff] [blame] | 791 | kvm_arch_memslots_updated(kvm, slots); |
Takuya Yoshikawa | e59dbe0 | 2013-07-04 13:40:29 +0900 | [diff] [blame] | 792 | |
| 793 | return old_memslots; |
Gleb Natapov | 7ec4fb4 | 2012-12-24 17:49:30 +0200 | [diff] [blame] | 794 | } |
| 795 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 796 | /* |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 797 | * Allocate some memory and give it an address in the guest physical address |
| 798 | * space. |
| 799 | * |
| 800 | * Discontiguous memory is allowed, mostly for framebuffers. |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 801 | * |
Dominik Dingel | 02d5d55 | 2014-10-27 16:22:56 +0100 | [diff] [blame] | 802 | * Must be called holding kvm->slots_lock for write. |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 803 | */ |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 804 | int __kvm_set_memory_region(struct kvm *kvm, |
Paolo Bonzini | 09170a4 | 2015-05-18 13:59:39 +0200 | [diff] [blame] | 805 | const struct kvm_userspace_memory_region *mem) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 806 | { |
Avi Kivity | 8234b22 | 2010-12-27 12:08:45 +0200 | [diff] [blame] | 807 | int r; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 808 | gfn_t base_gfn; |
Heiko Carstens | 28bcb11 | 2009-09-03 17:35:35 +0200 | [diff] [blame] | 809 | unsigned long npages; |
Takuya Yoshikawa | a843fac | 2013-01-11 18:27:43 +0900 | [diff] [blame] | 810 | struct kvm_memory_slot *slot; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 811 | struct kvm_memory_slot old, new; |
Alex Williamson | b7f69c5 | 2012-12-10 10:33:03 -0700 | [diff] [blame] | 812 | struct kvm_memslots *slots = NULL, *old_memslots; |
Paolo Bonzini | f481b06 | 2015-05-17 17:30:37 +0200 | [diff] [blame] | 813 | int as_id, id; |
Takuya Yoshikawa | f64c039 | 2013-01-29 11:00:07 +0900 | [diff] [blame] | 814 | enum kvm_mr_change change; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 815 | |
Xiao Guangrong | a50d64d | 2012-08-21 10:58:13 +0800 | [diff] [blame] | 816 | r = check_memory_region_flags(mem); |
| 817 | if (r) |
| 818 | goto out; |
| 819 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 820 | r = -EINVAL; |
Paolo Bonzini | f481b06 | 2015-05-17 17:30:37 +0200 | [diff] [blame] | 821 | as_id = mem->slot >> 16; |
| 822 | id = (u16)mem->slot; |
| 823 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 824 | /* General sanity checks */ |
| 825 | if (mem->memory_size & (PAGE_SIZE - 1)) |
| 826 | goto out; |
| 827 | if (mem->guest_phys_addr & (PAGE_SIZE - 1)) |
| 828 | goto out; |
Takuya Yoshikawa | fa3d315 | 2011-05-07 16:35:38 +0900 | [diff] [blame] | 829 | /* We can read the guest memory with __xxx_user() later on. */ |
Paolo Bonzini | f481b06 | 2015-05-17 17:30:37 +0200 | [diff] [blame] | 830 | if ((id < KVM_USER_MEM_SLOTS) && |
Takuya Yoshikawa | fa3d315 | 2011-05-07 16:35:38 +0900 | [diff] [blame] | 831 | ((mem->userspace_addr & (PAGE_SIZE - 1)) || |
Heiko Carstens | 9e3bb6b | 2011-05-24 07:51:27 +0200 | [diff] [blame] | 832 | !access_ok(VERIFY_WRITE, |
| 833 | (void __user *)(unsigned long)mem->userspace_addr, |
| 834 | mem->memory_size))) |
Hollis Blanchard | 7874980 | 2008-11-07 13:32:12 -0600 | [diff] [blame] | 835 | goto out; |
Paolo Bonzini | f481b06 | 2015-05-17 17:30:37 +0200 | [diff] [blame] | 836 | if (as_id >= KVM_ADDRESS_SPACE_NUM || id >= KVM_MEM_SLOTS_NUM) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 837 | goto out; |
| 838 | if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr) |
| 839 | goto out; |
| 840 | |
Paolo Bonzini | f481b06 | 2015-05-17 17:30:37 +0200 | [diff] [blame] | 841 | slot = id_to_memslot(__kvm_memslots(kvm, as_id), id); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 842 | base_gfn = mem->guest_phys_addr >> PAGE_SHIFT; |
| 843 | npages = mem->memory_size >> PAGE_SHIFT; |
| 844 | |
Takuya Yoshikawa | 660c22c | 2010-04-13 22:47:24 +0900 | [diff] [blame] | 845 | if (npages > KVM_MEM_MAX_NR_PAGES) |
| 846 | goto out; |
| 847 | |
Takuya Yoshikawa | a843fac | 2013-01-11 18:27:43 +0900 | [diff] [blame] | 848 | new = old = *slot; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 849 | |
Paolo Bonzini | f481b06 | 2015-05-17 17:30:37 +0200 | [diff] [blame] | 850 | new.id = id; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 851 | new.base_gfn = base_gfn; |
| 852 | new.npages = npages; |
| 853 | new.flags = mem->flags; |
| 854 | |
Takuya Yoshikawa | f64c039 | 2013-01-29 11:00:07 +0900 | [diff] [blame] | 855 | if (npages) { |
| 856 | if (!old.npages) |
| 857 | change = KVM_MR_CREATE; |
| 858 | else { /* Modify an existing slot. */ |
| 859 | if ((mem->userspace_addr != old.userspace_addr) || |
Takuya Yoshikawa | 75d61fb | 2013-01-30 19:40:41 +0900 | [diff] [blame] | 860 | (npages != old.npages) || |
| 861 | ((new.flags ^ old.flags) & KVM_MEM_READONLY)) |
Takuya Yoshikawa | f64c039 | 2013-01-29 11:00:07 +0900 | [diff] [blame] | 862 | goto out; |
| 863 | |
| 864 | if (base_gfn != old.base_gfn) |
| 865 | change = KVM_MR_MOVE; |
| 866 | else if (new.flags != old.flags) |
| 867 | change = KVM_MR_FLAGS_ONLY; |
| 868 | else { /* Nothing to change. */ |
| 869 | r = 0; |
| 870 | goto out; |
| 871 | } |
| 872 | } |
Paolo Bonzini | 09170a4 | 2015-05-18 13:59:39 +0200 | [diff] [blame] | 873 | } else { |
| 874 | if (!old.npages) |
| 875 | goto out; |
| 876 | |
Takuya Yoshikawa | f64c039 | 2013-01-29 11:00:07 +0900 | [diff] [blame] | 877 | change = KVM_MR_DELETE; |
Paolo Bonzini | 09170a4 | 2015-05-18 13:59:39 +0200 | [diff] [blame] | 878 | new.base_gfn = 0; |
| 879 | new.flags = 0; |
| 880 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 881 | |
Takuya Yoshikawa | f64c039 | 2013-01-29 11:00:07 +0900 | [diff] [blame] | 882 | if ((change == KVM_MR_CREATE) || (change == KVM_MR_MOVE)) { |
Takuya Yoshikawa | 0a706be | 2013-01-11 18:26:55 +0900 | [diff] [blame] | 883 | /* Check for overlaps */ |
| 884 | r = -EEXIST; |
Paolo Bonzini | f481b06 | 2015-05-17 17:30:37 +0200 | [diff] [blame] | 885 | kvm_for_each_memslot(slot, __kvm_memslots(kvm, as_id)) { |
Takuya Yoshikawa | a843fac | 2013-01-11 18:27:43 +0900 | [diff] [blame] | 886 | if ((slot->id >= KVM_USER_MEM_SLOTS) || |
Paolo Bonzini | f481b06 | 2015-05-17 17:30:37 +0200 | [diff] [blame] | 887 | (slot->id == id)) |
Takuya Yoshikawa | 0a706be | 2013-01-11 18:26:55 +0900 | [diff] [blame] | 888 | continue; |
| 889 | if (!((base_gfn + npages <= slot->base_gfn) || |
| 890 | (base_gfn >= slot->base_gfn + slot->npages))) |
| 891 | goto out; |
| 892 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 893 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 894 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 895 | /* Free page dirty bitmap if unneeded */ |
| 896 | if (!(new.flags & KVM_MEM_LOG_DIRTY_PAGES)) |
Al Viro | 8b6d44c | 2007-02-09 16:38:40 +0000 | [diff] [blame] | 897 | new.dirty_bitmap = NULL; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 898 | |
| 899 | r = -ENOMEM; |
Takuya Yoshikawa | f64c039 | 2013-01-29 11:00:07 +0900 | [diff] [blame] | 900 | if (change == KVM_MR_CREATE) { |
Takuya Yoshikawa | 189a2f7 | 2012-02-08 13:01:09 +0900 | [diff] [blame] | 901 | new.userspace_addr = mem->userspace_addr; |
Takuya Yoshikawa | d89cc61 | 2012-08-01 18:03:28 +0900 | [diff] [blame] | 902 | |
Aneesh Kumar K.V | 5587027 | 2013-10-07 22:18:00 +0530 | [diff] [blame] | 903 | if (kvm_arch_create_memslot(kvm, &new, npages)) |
Takuya Yoshikawa | db3fe4e | 2012-02-08 13:02:18 +0900 | [diff] [blame] | 904 | goto out_free; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 905 | } |
Joerg Roedel | ec04b26 | 2009-06-19 15:16:23 +0200 | [diff] [blame] | 906 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 907 | /* Allocate page dirty bitmap if needed */ |
| 908 | if ((new.flags & KVM_MEM_LOG_DIRTY_PAGES) && !new.dirty_bitmap) { |
Takuya Yoshikawa | a36a57b1 | 2010-10-27 18:22:19 +0900 | [diff] [blame] | 909 | if (kvm_create_dirty_bitmap(&new) < 0) |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 910 | goto out_free; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 911 | } |
| 912 | |
Igor Mammedov | 7449613 | 2015-03-20 12:21:37 +0000 | [diff] [blame] | 913 | slots = kvm_kvzalloc(sizeof(struct kvm_memslots)); |
Paolo Bonzini | f2a8103 | 2014-11-14 10:46:45 +0100 | [diff] [blame] | 914 | if (!slots) |
| 915 | goto out_free; |
Paolo Bonzini | f481b06 | 2015-05-17 17:30:37 +0200 | [diff] [blame] | 916 | memcpy(slots, __kvm_memslots(kvm, as_id), sizeof(struct kvm_memslots)); |
Paolo Bonzini | f2a8103 | 2014-11-14 10:46:45 +0100 | [diff] [blame] | 917 | |
Takuya Yoshikawa | f64c039 | 2013-01-29 11:00:07 +0900 | [diff] [blame] | 918 | if ((change == KVM_MR_DELETE) || (change == KVM_MR_MOVE)) { |
Paolo Bonzini | f481b06 | 2015-05-17 17:30:37 +0200 | [diff] [blame] | 919 | slot = id_to_memslot(slots, id); |
Xiao Guangrong | 28a3754 | 2011-11-24 19:04:35 +0800 | [diff] [blame] | 920 | slot->flags |= KVM_MEMSLOT_INVALID; |
| 921 | |
Paolo Bonzini | f481b06 | 2015-05-17 17:30:37 +0200 | [diff] [blame] | 922 | old_memslots = install_new_memslots(kvm, as_id, slots); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 923 | |
Alex Williamson | e40f193 | 2012-12-10 10:32:57 -0700 | [diff] [blame] | 924 | /* slot was deleted or moved, clear iommu mapping */ |
| 925 | kvm_iommu_unmap_pages(kvm, &old); |
Marcelo Tosatti | 12d6e75 | 2012-08-24 15:54:58 -0300 | [diff] [blame] | 926 | /* From this point no new shadow pages pointing to a deleted, |
| 927 | * or moved, memslot will be created. |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 928 | * |
| 929 | * validation of sp->gfn happens in: |
Xiubo Li | b7d409d | 2015-02-26 14:58:24 +0800 | [diff] [blame] | 930 | * - gfn_to_hva (kvm_read_guest, gfn_to_pfn) |
| 931 | * - kvm_is_visible_gfn (mmu_check_roots) |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 932 | */ |
Marcelo Tosatti | 2df72e9 | 2012-08-24 15:54:57 -0300 | [diff] [blame] | 933 | kvm_arch_flush_shadow_memslot(kvm, slot); |
Paolo Bonzini | f2a8103 | 2014-11-14 10:46:45 +0100 | [diff] [blame] | 934 | |
| 935 | /* |
| 936 | * We can re-use the old_memslots from above, the only difference |
| 937 | * from the currently installed memslots is the invalid flag. This |
| 938 | * will get overwritten by update_memslots anyway. |
| 939 | */ |
Alex Williamson | b7f69c5 | 2012-12-10 10:33:03 -0700 | [diff] [blame] | 940 | slots = old_memslots; |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 941 | } |
Marcelo Tosatti | 34d4cb8 | 2008-07-10 20:49:31 -0300 | [diff] [blame] | 942 | |
Takuya Yoshikawa | 7b6195a | 2013-02-27 19:44:34 +0900 | [diff] [blame] | 943 | r = kvm_arch_prepare_memory_region(kvm, &new, mem, change); |
Marcelo Tosatti | f7784b8 | 2009-12-23 14:35:18 -0200 | [diff] [blame] | 944 | if (r) |
Alex Williamson | b7f69c5 | 2012-12-10 10:33:03 -0700 | [diff] [blame] | 945 | goto out_slots; |
Marcelo Tosatti | f7784b8 | 2009-12-23 14:35:18 -0200 | [diff] [blame] | 946 | |
Paolo Bonzini | a47d2b0 | 2015-05-17 11:41:37 +0200 | [diff] [blame] | 947 | /* actual memory is freed via old in kvm_free_memslot below */ |
Takuya Yoshikawa | f64c039 | 2013-01-29 11:00:07 +0900 | [diff] [blame] | 948 | if (change == KVM_MR_DELETE) { |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 949 | new.dirty_bitmap = NULL; |
Takuya Yoshikawa | db3fe4e | 2012-02-08 13:02:18 +0900 | [diff] [blame] | 950 | memset(&new.arch, 0, sizeof(new.arch)); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 951 | } |
| 952 | |
Paolo Bonzini | 5cc1502 | 2014-11-14 10:55:31 +0100 | [diff] [blame] | 953 | update_memslots(slots, &new); |
Paolo Bonzini | f481b06 | 2015-05-17 17:30:37 +0200 | [diff] [blame] | 954 | old_memslots = install_new_memslots(kvm, as_id, slots); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 955 | |
Paolo Bonzini | f36f3f2 | 2015-05-18 13:20:23 +0200 | [diff] [blame] | 956 | kvm_arch_commit_memory_region(kvm, mem, &old, &new, change); |
Zhang Xiantao | 3ad82a7 | 2007-11-20 13:11:38 +0800 | [diff] [blame] | 957 | |
Paolo Bonzini | a47d2b0 | 2015-05-17 11:41:37 +0200 | [diff] [blame] | 958 | kvm_free_memslot(kvm, &old, &new); |
Igor Mammedov | 7449613 | 2015-03-20 12:21:37 +0000 | [diff] [blame] | 959 | kvfree(old_memslots); |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 960 | |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 961 | /* |
| 962 | * 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] | 963 | * un-mapped and re-mapped if their base changes. Since base change |
| 964 | * unmapping is handled above with slot deletion, mapping alone is |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 965 | * needed here. Anything else the iommu might care about for existing |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 966 | * slots (size changes, userspace addr changes and read-only flag |
| 967 | * changes) is disallowed above, so any other attribute changes getting |
| 968 | * here can be skipped. |
Izik Eidus | 210c7c4 | 2007-10-24 23:52:57 +0200 | [diff] [blame] | 969 | */ |
| 970 | if ((change == KVM_MR_CREATE) || (change == KVM_MR_MOVE)) { |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 971 | r = kvm_iommu_map_pages(kvm, &new); |
Yang Zhang | e0230e1 | 2013-10-24 09:56:39 +0800 | [diff] [blame] | 972 | return r; |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 973 | } |
| 974 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 975 | return 0; |
| 976 | |
| 977 | out_slots: |
Igor Mammedov | 7449613 | 2015-03-20 12:21:37 +0000 | [diff] [blame] | 978 | kvfree(slots); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 979 | out_free: |
Paolo Bonzini | a47d2b0 | 2015-05-17 11:41:37 +0200 | [diff] [blame] | 980 | kvm_free_memslot(kvm, &new, &old); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 981 | out: |
| 982 | return r; |
Izik Eidus | 210c7c4 | 2007-10-24 23:52:57 +0200 | [diff] [blame] | 983 | } |
| 984 | EXPORT_SYMBOL_GPL(__kvm_set_memory_region); |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 985 | |
| 986 | int kvm_set_memory_region(struct kvm *kvm, |
Paolo Bonzini | 09170a4 | 2015-05-18 13:59:39 +0200 | [diff] [blame] | 987 | const struct kvm_userspace_memory_region *mem) |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 988 | { |
| 989 | int r; |
| 990 | |
Marcelo Tosatti | 79fac95 | 2009-12-23 14:35:26 -0200 | [diff] [blame] | 991 | mutex_lock(&kvm->slots_lock); |
Takuya Yoshikawa | 47ae31e | 2013-02-27 19:43:00 +0900 | [diff] [blame] | 992 | r = __kvm_set_memory_region(kvm, mem); |
Marcelo Tosatti | 79fac95 | 2009-12-23 14:35:26 -0200 | [diff] [blame] | 993 | mutex_unlock(&kvm->slots_lock); |
Sheng Yang | f78e0e2 | 2007-10-29 09:40:42 +0800 | [diff] [blame] | 994 | return r; |
| 995 | } |
Izik Eidus | 210c7c4 | 2007-10-24 23:52:57 +0200 | [diff] [blame] | 996 | EXPORT_SYMBOL_GPL(kvm_set_memory_region); |
| 997 | |
Stephen Hemminger | 7940876 | 2013-12-29 12:12:29 -0800 | [diff] [blame] | 998 | static int kvm_vm_ioctl_set_memory_region(struct kvm *kvm, |
| 999 | struct kvm_userspace_memory_region *mem) |
Izik Eidus | 210c7c4 | 2007-10-24 23:52:57 +0200 | [diff] [blame] | 1000 | { |
Paolo Bonzini | f481b06 | 2015-05-17 17:30:37 +0200 | [diff] [blame] | 1001 | if ((u16)mem->slot >= KVM_USER_MEM_SLOTS) |
Izik Eidus | e0d62c7 | 2007-10-24 23:57:46 +0200 | [diff] [blame] | 1002 | return -EINVAL; |
Paolo Bonzini | 09170a4 | 2015-05-18 13:59:39 +0200 | [diff] [blame] | 1003 | |
Takuya Yoshikawa | 47ae31e | 2013-02-27 19:43:00 +0900 | [diff] [blame] | 1004 | return kvm_set_memory_region(kvm, mem); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1005 | } |
| 1006 | |
Zhang Xiantao | 5bb064d | 2007-11-18 20:29:43 +0800 | [diff] [blame] | 1007 | int kvm_get_dirty_log(struct kvm *kvm, |
| 1008 | struct kvm_dirty_log *log, int *is_dirty) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1009 | { |
Paolo Bonzini | 9f6b802 | 2015-05-17 16:20:07 +0200 | [diff] [blame] | 1010 | struct kvm_memslots *slots; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1011 | struct kvm_memory_slot *memslot; |
Paolo Bonzini | f481b06 | 2015-05-17 17:30:37 +0200 | [diff] [blame] | 1012 | int r, i, as_id, id; |
Takuya Yoshikawa | 87bf6e7 | 2010-04-12 19:35:35 +0900 | [diff] [blame] | 1013 | unsigned long n; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1014 | unsigned long any = 0; |
| 1015 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1016 | r = -EINVAL; |
Paolo Bonzini | f481b06 | 2015-05-17 17:30:37 +0200 | [diff] [blame] | 1017 | as_id = log->slot >> 16; |
| 1018 | id = (u16)log->slot; |
| 1019 | if (as_id >= KVM_ADDRESS_SPACE_NUM || id >= KVM_USER_MEM_SLOTS) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1020 | goto out; |
| 1021 | |
Paolo Bonzini | f481b06 | 2015-05-17 17:30:37 +0200 | [diff] [blame] | 1022 | slots = __kvm_memslots(kvm, as_id); |
| 1023 | memslot = id_to_memslot(slots, id); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1024 | r = -ENOENT; |
| 1025 | if (!memslot->dirty_bitmap) |
| 1026 | goto out; |
| 1027 | |
Takuya Yoshikawa | 87bf6e7 | 2010-04-12 19:35:35 +0900 | [diff] [blame] | 1028 | n = kvm_dirty_bitmap_bytes(memslot); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1029 | |
Uri Lublin | cd1a4a9 | 2007-02-22 16:43:09 +0200 | [diff] [blame] | 1030 | for (i = 0; !any && i < n/sizeof(long); ++i) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1031 | any = memslot->dirty_bitmap[i]; |
| 1032 | |
| 1033 | r = -EFAULT; |
| 1034 | if (copy_to_user(log->dirty_bitmap, memslot->dirty_bitmap, n)) |
| 1035 | goto out; |
| 1036 | |
Zhang Xiantao | 5bb064d | 2007-11-18 20:29:43 +0800 | [diff] [blame] | 1037 | if (any) |
| 1038 | *is_dirty = 1; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1039 | |
| 1040 | r = 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1041 | out: |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1042 | return r; |
| 1043 | } |
Aneesh Kumar K.V | 2ba9f0d | 2013-10-07 22:17:59 +0530 | [diff] [blame] | 1044 | EXPORT_SYMBOL_GPL(kvm_get_dirty_log); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1045 | |
Mario Smarduch | ba0513b | 2015-01-15 15:58:53 -0800 | [diff] [blame] | 1046 | #ifdef CONFIG_KVM_GENERIC_DIRTYLOG_READ_PROTECT |
| 1047 | /** |
| 1048 | * kvm_get_dirty_log_protect - get a snapshot of dirty pages, and if any pages |
| 1049 | * are dirty write protect them for next write. |
| 1050 | * @kvm: pointer to kvm instance |
| 1051 | * @log: slot id and address to which we copy the log |
| 1052 | * @is_dirty: flag set if any page is dirty |
| 1053 | * |
| 1054 | * We need to keep it in mind that VCPU threads can write to the bitmap |
| 1055 | * concurrently. So, to avoid losing track of dirty pages we keep the |
| 1056 | * following order: |
| 1057 | * |
| 1058 | * 1. Take a snapshot of the bit and clear it if needed. |
| 1059 | * 2. Write protect the corresponding page. |
| 1060 | * 3. Copy the snapshot to the userspace. |
| 1061 | * 4. Upon return caller flushes TLB's if needed. |
| 1062 | * |
| 1063 | * Between 2 and 4, the guest may write to the page using the remaining TLB |
| 1064 | * entry. This is not a problem because the page is reported dirty using |
| 1065 | * the snapshot taken before and step 4 ensures that writes done after |
| 1066 | * exiting to userspace will be logged for the next call. |
| 1067 | * |
| 1068 | */ |
| 1069 | int kvm_get_dirty_log_protect(struct kvm *kvm, |
| 1070 | struct kvm_dirty_log *log, bool *is_dirty) |
| 1071 | { |
Paolo Bonzini | 9f6b802 | 2015-05-17 16:20:07 +0200 | [diff] [blame] | 1072 | struct kvm_memslots *slots; |
Mario Smarduch | ba0513b | 2015-01-15 15:58:53 -0800 | [diff] [blame] | 1073 | struct kvm_memory_slot *memslot; |
Paolo Bonzini | f481b06 | 2015-05-17 17:30:37 +0200 | [diff] [blame] | 1074 | int r, i, as_id, id; |
Mario Smarduch | ba0513b | 2015-01-15 15:58:53 -0800 | [diff] [blame] | 1075 | unsigned long n; |
| 1076 | unsigned long *dirty_bitmap; |
| 1077 | unsigned long *dirty_bitmap_buffer; |
| 1078 | |
| 1079 | r = -EINVAL; |
Paolo Bonzini | f481b06 | 2015-05-17 17:30:37 +0200 | [diff] [blame] | 1080 | as_id = log->slot >> 16; |
| 1081 | id = (u16)log->slot; |
| 1082 | if (as_id >= KVM_ADDRESS_SPACE_NUM || id >= KVM_USER_MEM_SLOTS) |
Mario Smarduch | ba0513b | 2015-01-15 15:58:53 -0800 | [diff] [blame] | 1083 | goto out; |
| 1084 | |
Paolo Bonzini | f481b06 | 2015-05-17 17:30:37 +0200 | [diff] [blame] | 1085 | slots = __kvm_memslots(kvm, as_id); |
| 1086 | memslot = id_to_memslot(slots, id); |
Mario Smarduch | ba0513b | 2015-01-15 15:58:53 -0800 | [diff] [blame] | 1087 | |
| 1088 | dirty_bitmap = memslot->dirty_bitmap; |
| 1089 | r = -ENOENT; |
| 1090 | if (!dirty_bitmap) |
| 1091 | goto out; |
| 1092 | |
| 1093 | n = kvm_dirty_bitmap_bytes(memslot); |
| 1094 | |
| 1095 | dirty_bitmap_buffer = dirty_bitmap + n / sizeof(long); |
| 1096 | memset(dirty_bitmap_buffer, 0, n); |
| 1097 | |
| 1098 | spin_lock(&kvm->mmu_lock); |
| 1099 | *is_dirty = false; |
| 1100 | for (i = 0; i < n / sizeof(long); i++) { |
| 1101 | unsigned long mask; |
| 1102 | gfn_t offset; |
| 1103 | |
| 1104 | if (!dirty_bitmap[i]) |
| 1105 | continue; |
| 1106 | |
| 1107 | *is_dirty = true; |
| 1108 | |
| 1109 | mask = xchg(&dirty_bitmap[i], 0); |
| 1110 | dirty_bitmap_buffer[i] = mask; |
| 1111 | |
Takuya Yoshikawa | 58d2930 | 2015-03-17 16:19:58 +0900 | [diff] [blame] | 1112 | if (mask) { |
| 1113 | offset = i * BITS_PER_LONG; |
| 1114 | kvm_arch_mmu_enable_log_dirty_pt_masked(kvm, memslot, |
| 1115 | offset, mask); |
| 1116 | } |
Mario Smarduch | ba0513b | 2015-01-15 15:58:53 -0800 | [diff] [blame] | 1117 | } |
| 1118 | |
| 1119 | spin_unlock(&kvm->mmu_lock); |
| 1120 | |
| 1121 | r = -EFAULT; |
| 1122 | if (copy_to_user(log->dirty_bitmap, dirty_bitmap_buffer, n)) |
| 1123 | goto out; |
| 1124 | |
| 1125 | r = 0; |
| 1126 | out: |
| 1127 | return r; |
| 1128 | } |
| 1129 | EXPORT_SYMBOL_GPL(kvm_get_dirty_log_protect); |
| 1130 | #endif |
| 1131 | |
Takuya Yoshikawa | db3fe4e | 2012-02-08 13:02:18 +0900 | [diff] [blame] | 1132 | bool kvm_largepages_enabled(void) |
| 1133 | { |
| 1134 | return largepages_enabled; |
| 1135 | } |
| 1136 | |
Marcelo Tosatti | 54dee99 | 2009-06-11 12:07:44 -0300 | [diff] [blame] | 1137 | void kvm_disable_largepages(void) |
| 1138 | { |
| 1139 | largepages_enabled = false; |
| 1140 | } |
| 1141 | EXPORT_SYMBOL_GPL(kvm_disable_largepages); |
| 1142 | |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1143 | struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn) |
| 1144 | { |
| 1145 | return __gfn_to_memslot(kvm_memslots(kvm), gfn); |
| 1146 | } |
Avi Kivity | a1f4d395 | 2010-06-21 11:44:20 +0300 | [diff] [blame] | 1147 | EXPORT_SYMBOL_GPL(gfn_to_memslot); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1148 | |
Paolo Bonzini | 8e73485 | 2015-05-17 13:58:53 +0200 | [diff] [blame] | 1149 | struct kvm_memory_slot *kvm_vcpu_gfn_to_memslot(struct kvm_vcpu *vcpu, gfn_t gfn) |
| 1150 | { |
| 1151 | return __gfn_to_memslot(kvm_vcpu_memslots(vcpu), gfn); |
| 1152 | } |
| 1153 | |
Yaowei Bai | 33e9415 | 2015-11-14 11:21:06 +0800 | [diff] [blame] | 1154 | bool kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn) |
Izik Eidus | e0d62c7 | 2007-10-24 23:57:46 +0200 | [diff] [blame] | 1155 | { |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 1156 | struct kvm_memory_slot *memslot = gfn_to_memslot(kvm, gfn); |
Izik Eidus | e0d62c7 | 2007-10-24 23:57:46 +0200 | [diff] [blame] | 1157 | |
Alex Williamson | bbacc0c | 2012-12-10 10:33:09 -0700 | [diff] [blame] | 1158 | if (!memslot || memslot->id >= KVM_USER_MEM_SLOTS || |
Xiao Guangrong | bf3e05b | 2011-11-24 17:40:57 +0800 | [diff] [blame] | 1159 | memslot->flags & KVM_MEMSLOT_INVALID) |
Yaowei Bai | 33e9415 | 2015-11-14 11:21:06 +0800 | [diff] [blame] | 1160 | return false; |
Izik Eidus | e0d62c7 | 2007-10-24 23:57:46 +0200 | [diff] [blame] | 1161 | |
Yaowei Bai | 33e9415 | 2015-11-14 11:21:06 +0800 | [diff] [blame] | 1162 | return true; |
Izik Eidus | e0d62c7 | 2007-10-24 23:57:46 +0200 | [diff] [blame] | 1163 | } |
| 1164 | EXPORT_SYMBOL_GPL(kvm_is_visible_gfn); |
| 1165 | |
Joerg Roedel | 8f0b1ab | 2010-01-28 12:37:56 +0100 | [diff] [blame] | 1166 | unsigned long kvm_host_page_size(struct kvm *kvm, gfn_t gfn) |
| 1167 | { |
| 1168 | struct vm_area_struct *vma; |
| 1169 | unsigned long addr, size; |
| 1170 | |
| 1171 | size = PAGE_SIZE; |
| 1172 | |
| 1173 | addr = gfn_to_hva(kvm, gfn); |
| 1174 | if (kvm_is_error_hva(addr)) |
| 1175 | return PAGE_SIZE; |
| 1176 | |
| 1177 | down_read(¤t->mm->mmap_sem); |
| 1178 | vma = find_vma(current->mm, addr); |
| 1179 | if (!vma) |
| 1180 | goto out; |
| 1181 | |
| 1182 | size = vma_kernel_pagesize(vma); |
| 1183 | |
| 1184 | out: |
| 1185 | up_read(¤t->mm->mmap_sem); |
| 1186 | |
| 1187 | return size; |
| 1188 | } |
| 1189 | |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1190 | static bool memslot_is_readonly(struct kvm_memory_slot *slot) |
| 1191 | { |
| 1192 | return slot->flags & KVM_MEM_READONLY; |
| 1193 | } |
| 1194 | |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1195 | static unsigned long __gfn_to_hva_many(struct kvm_memory_slot *slot, gfn_t gfn, |
| 1196 | gfn_t *nr_pages, bool write) |
Izik Eidus | 539cb66 | 2007-11-11 22:05:04 +0200 | [diff] [blame] | 1197 | { |
Marcelo Tosatti | bc6678a | 2009-12-23 14:35:21 -0200 | [diff] [blame] | 1198 | if (!slot || slot->flags & KVM_MEMSLOT_INVALID) |
Xiao Guangrong | ca3a490 | 2012-08-21 11:01:50 +0800 | [diff] [blame] | 1199 | return KVM_HVA_ERR_BAD; |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 1200 | |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1201 | if (memslot_is_readonly(slot) && write) |
| 1202 | return KVM_HVA_ERR_RO_BAD; |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 1203 | |
| 1204 | if (nr_pages) |
| 1205 | *nr_pages = slot->npages - (gfn - slot->base_gfn); |
| 1206 | |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1207 | return __gfn_to_hva_memslot(slot, gfn); |
Izik Eidus | 539cb66 | 2007-11-11 22:05:04 +0200 | [diff] [blame] | 1208 | } |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 1209 | |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1210 | static unsigned long gfn_to_hva_many(struct kvm_memory_slot *slot, gfn_t gfn, |
| 1211 | gfn_t *nr_pages) |
| 1212 | { |
| 1213 | return __gfn_to_hva_many(slot, gfn, nr_pages, true); |
| 1214 | } |
| 1215 | |
| 1216 | unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, |
Stephen Hemminger | 7940876 | 2013-12-29 12:12:29 -0800 | [diff] [blame] | 1217 | gfn_t gfn) |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1218 | { |
| 1219 | return gfn_to_hva_many(slot, gfn, NULL); |
| 1220 | } |
| 1221 | EXPORT_SYMBOL_GPL(gfn_to_hva_memslot); |
| 1222 | |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 1223 | unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn) |
| 1224 | { |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1225 | return gfn_to_hva_many(gfn_to_memslot(kvm, gfn), gfn, NULL); |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 1226 | } |
Sheng Yang | 0d15029 | 2008-04-25 21:44:50 +0800 | [diff] [blame] | 1227 | EXPORT_SYMBOL_GPL(gfn_to_hva); |
Izik Eidus | 539cb66 | 2007-11-11 22:05:04 +0200 | [diff] [blame] | 1228 | |
Paolo Bonzini | 8e73485 | 2015-05-17 13:58:53 +0200 | [diff] [blame] | 1229 | unsigned long kvm_vcpu_gfn_to_hva(struct kvm_vcpu *vcpu, gfn_t gfn) |
| 1230 | { |
| 1231 | return gfn_to_hva_many(kvm_vcpu_gfn_to_memslot(vcpu, gfn), gfn, NULL); |
| 1232 | } |
| 1233 | EXPORT_SYMBOL_GPL(kvm_vcpu_gfn_to_hva); |
| 1234 | |
Xiao Guangrong | 86ab8cf | 2012-08-21 10:59:53 +0800 | [diff] [blame] | 1235 | /* |
Paolo Bonzini | ba6a354 | 2013-09-09 13:52:33 +0200 | [diff] [blame] | 1236 | * If writable is set to false, the hva returned by this function is only |
| 1237 | * allowed to be read. |
Xiao Guangrong | 86ab8cf | 2012-08-21 10:59:53 +0800 | [diff] [blame] | 1238 | */ |
Christoffer Dall | 64d8312 | 2014-08-19 12:15:00 +0200 | [diff] [blame] | 1239 | unsigned long gfn_to_hva_memslot_prot(struct kvm_memory_slot *slot, |
| 1240 | gfn_t gfn, bool *writable) |
Gleb Natapov | 8030089 | 2010-10-19 18:13:41 +0200 | [diff] [blame] | 1241 | { |
Gleb Natapov | a2ac07f | 2013-10-01 19:58:36 +0300 | [diff] [blame] | 1242 | unsigned long hva = __gfn_to_hva_many(slot, gfn, NULL, false); |
| 1243 | |
| 1244 | if (!kvm_is_error_hva(hva) && writable) |
Paolo Bonzini | ba6a354 | 2013-09-09 13:52:33 +0200 | [diff] [blame] | 1245 | *writable = !memslot_is_readonly(slot); |
| 1246 | |
Gleb Natapov | a2ac07f | 2013-10-01 19:58:36 +0300 | [diff] [blame] | 1247 | return hva; |
Xiao Guangrong | 86ab8cf | 2012-08-21 10:59:53 +0800 | [diff] [blame] | 1248 | } |
| 1249 | |
Christoffer Dall | 64d8312 | 2014-08-19 12:15:00 +0200 | [diff] [blame] | 1250 | unsigned long gfn_to_hva_prot(struct kvm *kvm, gfn_t gfn, bool *writable) |
| 1251 | { |
| 1252 | struct kvm_memory_slot *slot = gfn_to_memslot(kvm, gfn); |
| 1253 | |
| 1254 | return gfn_to_hva_memslot_prot(slot, gfn, writable); |
| 1255 | } |
| 1256 | |
Paolo Bonzini | 8e73485 | 2015-05-17 13:58:53 +0200 | [diff] [blame] | 1257 | unsigned long kvm_vcpu_gfn_to_hva_prot(struct kvm_vcpu *vcpu, gfn_t gfn, bool *writable) |
| 1258 | { |
| 1259 | struct kvm_memory_slot *slot = kvm_vcpu_gfn_to_memslot(vcpu, gfn); |
| 1260 | |
| 1261 | return gfn_to_hva_memslot_prot(slot, gfn, writable); |
| 1262 | } |
| 1263 | |
Dave Hansen | d4edcf0 | 2016-02-12 13:01:56 -0800 | [diff] [blame] | 1264 | static int get_user_page_nowait(unsigned long start, int write, |
| 1265 | struct page **page) |
Gleb Natapov | 0857b9e | 2011-02-01 13:21:47 +0200 | [diff] [blame] | 1266 | { |
| 1267 | int flags = FOLL_TOUCH | FOLL_NOWAIT | FOLL_HWPOISON | FOLL_GET; |
| 1268 | |
| 1269 | if (write) |
| 1270 | flags |= FOLL_WRITE; |
| 1271 | |
Dave Hansen | d4edcf0 | 2016-02-12 13:01:56 -0800 | [diff] [blame] | 1272 | return __get_user_pages(current, current->mm, start, 1, flags, page, |
| 1273 | NULL, NULL); |
Gleb Natapov | 0857b9e | 2011-02-01 13:21:47 +0200 | [diff] [blame] | 1274 | } |
| 1275 | |
Huang Ying | fafc3db | 2011-01-30 11:15:49 +0800 | [diff] [blame] | 1276 | static inline int check_user_page_hwpoison(unsigned long addr) |
| 1277 | { |
| 1278 | int rc, flags = FOLL_TOUCH | FOLL_HWPOISON | FOLL_WRITE; |
| 1279 | |
| 1280 | rc = __get_user_pages(current, current->mm, addr, 1, |
| 1281 | flags, NULL, NULL, NULL); |
| 1282 | return rc == -EHWPOISON; |
| 1283 | } |
| 1284 | |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1285 | /* |
| 1286 | * The atomic path to get the writable pfn which will be stored in @pfn, |
| 1287 | * true indicates success, otherwise false is returned. |
| 1288 | */ |
| 1289 | static bool hva_to_pfn_fast(unsigned long addr, bool atomic, bool *async, |
Dan Williams | ba049e9 | 2016-01-15 16:56:11 -0800 | [diff] [blame] | 1290 | bool write_fault, bool *writable, kvm_pfn_t *pfn) |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1291 | { |
| 1292 | struct page *page[1]; |
| 1293 | int npages; |
| 1294 | |
| 1295 | if (!(async || atomic)) |
| 1296 | return false; |
| 1297 | |
Xiao Guangrong | 12ce13f | 2012-08-21 11:00:49 +0800 | [diff] [blame] | 1298 | /* |
| 1299 | * Fast pin a writable pfn only if it is a write fault request |
| 1300 | * or the caller allows to map a writable pfn for a read fault |
| 1301 | * request. |
| 1302 | */ |
| 1303 | if (!(write_fault || writable)) |
| 1304 | return false; |
| 1305 | |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1306 | npages = __get_user_pages_fast(addr, 1, 1, page); |
| 1307 | if (npages == 1) { |
| 1308 | *pfn = page_to_pfn(page[0]); |
| 1309 | |
| 1310 | if (writable) |
| 1311 | *writable = true; |
| 1312 | return true; |
| 1313 | } |
| 1314 | |
| 1315 | return false; |
| 1316 | } |
| 1317 | |
| 1318 | /* |
| 1319 | * The slow path to get the pfn of the specified host virtual address, |
| 1320 | * 1 indicates success, -errno is returned if error is detected. |
| 1321 | */ |
| 1322 | static int hva_to_pfn_slow(unsigned long addr, bool *async, bool write_fault, |
Dan Williams | ba049e9 | 2016-01-15 16:56:11 -0800 | [diff] [blame] | 1323 | bool *writable, kvm_pfn_t *pfn) |
Avi Kivity | 954bbbc | 2007-03-30 14:02:32 +0300 | [diff] [blame] | 1324 | { |
Anthony Liguori | 8d4e128 | 2007-10-18 09:59:34 -0500 | [diff] [blame] | 1325 | struct page *page[1]; |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 1326 | int npages = 0; |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1327 | |
| 1328 | might_sleep(); |
| 1329 | |
| 1330 | if (writable) |
| 1331 | *writable = write_fault; |
| 1332 | |
| 1333 | if (async) { |
| 1334 | down_read(¤t->mm->mmap_sem); |
Dave Hansen | d4edcf0 | 2016-02-12 13:01:56 -0800 | [diff] [blame] | 1335 | npages = get_user_page_nowait(addr, write_fault, page); |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1336 | up_read(¤t->mm->mmap_sem); |
Andrea Arcangeli | 0664e57 | 2015-02-11 15:27:28 -0800 | [diff] [blame] | 1337 | } else |
| 1338 | npages = __get_user_pages_unlocked(current, current->mm, addr, 1, |
| 1339 | write_fault, 0, page, |
| 1340 | FOLL_TOUCH|FOLL_HWPOISON); |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1341 | if (npages != 1) |
| 1342 | return npages; |
| 1343 | |
| 1344 | /* map read fault as writable if possible */ |
Xiao Guangrong | 12ce13f | 2012-08-21 11:00:49 +0800 | [diff] [blame] | 1345 | if (unlikely(!write_fault) && writable) { |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1346 | struct page *wpage[1]; |
| 1347 | |
| 1348 | npages = __get_user_pages_fast(addr, 1, 1, wpage); |
| 1349 | if (npages == 1) { |
| 1350 | *writable = true; |
| 1351 | put_page(page[0]); |
| 1352 | page[0] = wpage[0]; |
| 1353 | } |
| 1354 | |
| 1355 | npages = 1; |
| 1356 | } |
| 1357 | *pfn = page_to_pfn(page[0]); |
| 1358 | return npages; |
| 1359 | } |
| 1360 | |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1361 | static bool vma_is_valid(struct vm_area_struct *vma, bool write_fault) |
| 1362 | { |
| 1363 | if (unlikely(!(vma->vm_flags & VM_READ))) |
| 1364 | return false; |
| 1365 | |
| 1366 | if (write_fault && (unlikely(!(vma->vm_flags & VM_WRITE)))) |
| 1367 | return false; |
| 1368 | |
| 1369 | return true; |
| 1370 | } |
| 1371 | |
Xiao Guangrong | 12ce13f | 2012-08-21 11:00:49 +0800 | [diff] [blame] | 1372 | /* |
| 1373 | * Pin guest page in memory and return its pfn. |
| 1374 | * @addr: host virtual address which maps memory to the guest |
| 1375 | * @atomic: whether this function can sleep |
| 1376 | * @async: whether this function need to wait IO complete if the |
| 1377 | * host page is not in the memory |
| 1378 | * @write_fault: whether we should get a writable host page |
| 1379 | * @writable: whether it allows to map a writable host page for !@write_fault |
| 1380 | * |
| 1381 | * The function will map a writable host page for these two cases: |
| 1382 | * 1): @write_fault = true |
| 1383 | * 2): @write_fault = false && @writable, @writable will tell the caller |
| 1384 | * whether the mapping is writable. |
| 1385 | */ |
Dan Williams | ba049e9 | 2016-01-15 16:56:11 -0800 | [diff] [blame] | 1386 | static kvm_pfn_t hva_to_pfn(unsigned long addr, bool atomic, bool *async, |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1387 | bool write_fault, bool *writable) |
| 1388 | { |
| 1389 | struct vm_area_struct *vma; |
Dan Williams | ba049e9 | 2016-01-15 16:56:11 -0800 | [diff] [blame] | 1390 | kvm_pfn_t pfn = 0; |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1391 | int npages; |
Avi Kivity | 954bbbc | 2007-03-30 14:02:32 +0300 | [diff] [blame] | 1392 | |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 1393 | /* we can do it either atomically or asynchronously, not both */ |
| 1394 | BUG_ON(atomic && async); |
| 1395 | |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1396 | if (hva_to_pfn_fast(addr, atomic, async, write_fault, writable, &pfn)) |
| 1397 | return pfn; |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1398 | |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1399 | if (atomic) |
| 1400 | return KVM_PFN_ERR_FAULT; |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1401 | |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1402 | npages = hva_to_pfn_slow(addr, async, write_fault, writable, &pfn); |
| 1403 | if (npages == 1) |
| 1404 | return pfn; |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 1405 | |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1406 | down_read(¤t->mm->mmap_sem); |
| 1407 | if (npages == -EHWPOISON || |
| 1408 | (!async && check_user_page_hwpoison(addr))) { |
| 1409 | pfn = KVM_PFN_ERR_HWPOISON; |
| 1410 | goto exit; |
Xiao Guangrong | 887c08a | 2010-08-22 19:10:28 +0800 | [diff] [blame] | 1411 | } |
Izik Eidus | 539cb66 | 2007-11-11 22:05:04 +0200 | [diff] [blame] | 1412 | |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1413 | vma = find_vma_intersection(current->mm, addr, addr + 1); |
Anthony Liguori | 8d4e128 | 2007-10-18 09:59:34 -0500 | [diff] [blame] | 1414 | |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1415 | if (vma == NULL) |
| 1416 | pfn = KVM_PFN_ERR_FAULT; |
| 1417 | else if ((vma->vm_flags & VM_PFNMAP)) { |
| 1418 | pfn = ((addr - vma->vm_start) >> PAGE_SHIFT) + |
| 1419 | vma->vm_pgoff; |
Ard Biesheuvel | bf4bea8 | 2014-11-10 08:33:56 +0000 | [diff] [blame] | 1420 | BUG_ON(!kvm_is_reserved_pfn(pfn)); |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1421 | } else { |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1422 | if (async && vma_is_valid(vma, write_fault)) |
Xiao Guangrong | 2fc8431 | 2012-08-21 11:00:22 +0800 | [diff] [blame] | 1423 | *async = true; |
| 1424 | pfn = KVM_PFN_ERR_FAULT; |
| 1425 | } |
| 1426 | exit: |
| 1427 | up_read(¤t->mm->mmap_sem); |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1428 | return pfn; |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1429 | } |
| 1430 | |
Dan Williams | ba049e9 | 2016-01-15 16:56:11 -0800 | [diff] [blame] | 1431 | kvm_pfn_t __gfn_to_pfn_memslot(struct kvm_memory_slot *slot, gfn_t gfn, |
| 1432 | bool atomic, bool *async, bool write_fault, |
| 1433 | bool *writable) |
Xiao Guangrong | 887c08a | 2010-08-22 19:10:28 +0800 | [diff] [blame] | 1434 | { |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1435 | unsigned long addr = __gfn_to_hva_many(slot, gfn, NULL, write_fault); |
| 1436 | |
Paolo Bonzini | b2740d3 | 2016-02-23 15:36:01 +0100 | [diff] [blame] | 1437 | if (addr == KVM_HVA_ERR_RO_BAD) { |
| 1438 | if (writable) |
| 1439 | *writable = false; |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1440 | return KVM_PFN_ERR_RO_FAULT; |
Paolo Bonzini | b2740d3 | 2016-02-23 15:36:01 +0100 | [diff] [blame] | 1441 | } |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1442 | |
Paolo Bonzini | b2740d3 | 2016-02-23 15:36:01 +0100 | [diff] [blame] | 1443 | if (kvm_is_error_hva(addr)) { |
| 1444 | if (writable) |
| 1445 | *writable = false; |
Xiao Guangrong | 81c52c5 | 2012-10-16 20:10:59 +0800 | [diff] [blame] | 1446 | return KVM_PFN_NOSLOT; |
Paolo Bonzini | b2740d3 | 2016-02-23 15:36:01 +0100 | [diff] [blame] | 1447 | } |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1448 | |
| 1449 | /* Do not map writable pfn in the readonly memslot. */ |
| 1450 | if (writable && memslot_is_readonly(slot)) { |
| 1451 | *writable = false; |
| 1452 | writable = NULL; |
| 1453 | } |
| 1454 | |
| 1455 | return hva_to_pfn(addr, atomic, async, write_fault, |
| 1456 | writable); |
Xiao Guangrong | 887c08a | 2010-08-22 19:10:28 +0800 | [diff] [blame] | 1457 | } |
Paolo Bonzini | 3520469 | 2015-04-02 11:20:48 +0200 | [diff] [blame] | 1458 | EXPORT_SYMBOL_GPL(__gfn_to_pfn_memslot); |
Xiao Guangrong | 887c08a | 2010-08-22 19:10:28 +0800 | [diff] [blame] | 1459 | |
Dan Williams | ba049e9 | 2016-01-15 16:56:11 -0800 | [diff] [blame] | 1460 | kvm_pfn_t gfn_to_pfn_prot(struct kvm *kvm, gfn_t gfn, bool write_fault, |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1461 | bool *writable) |
| 1462 | { |
Paolo Bonzini | e37afc6 | 2015-05-19 16:09:04 +0200 | [diff] [blame] | 1463 | return __gfn_to_pfn_memslot(gfn_to_memslot(kvm, gfn), gfn, false, NULL, |
| 1464 | write_fault, writable); |
Marcelo Tosatti | 612819c | 2010-10-22 14:18:18 -0200 | [diff] [blame] | 1465 | } |
| 1466 | EXPORT_SYMBOL_GPL(gfn_to_pfn_prot); |
| 1467 | |
Dan Williams | ba049e9 | 2016-01-15 16:56:11 -0800 | [diff] [blame] | 1468 | kvm_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] | 1469 | { |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1470 | return __gfn_to_pfn_memslot(slot, gfn, false, NULL, true, NULL); |
Marcelo Tosatti | 506f0d6 | 2009-12-23 14:35:19 -0200 | [diff] [blame] | 1471 | } |
Paolo Bonzini | e37afc6 | 2015-05-19 16:09:04 +0200 | [diff] [blame] | 1472 | EXPORT_SYMBOL_GPL(gfn_to_pfn_memslot); |
Marcelo Tosatti | 506f0d6 | 2009-12-23 14:35:19 -0200 | [diff] [blame] | 1473 | |
Dan Williams | ba049e9 | 2016-01-15 16:56:11 -0800 | [diff] [blame] | 1474 | kvm_pfn_t gfn_to_pfn_memslot_atomic(struct kvm_memory_slot *slot, gfn_t gfn) |
Xiao Guangrong | 037d92d | 2012-08-21 10:59:12 +0800 | [diff] [blame] | 1475 | { |
Xiao Guangrong | 4d8b81a | 2012-08-21 11:02:51 +0800 | [diff] [blame] | 1476 | return __gfn_to_pfn_memslot(slot, gfn, true, NULL, true, NULL); |
Xiao Guangrong | 037d92d | 2012-08-21 10:59:12 +0800 | [diff] [blame] | 1477 | } |
| 1478 | EXPORT_SYMBOL_GPL(gfn_to_pfn_memslot_atomic); |
| 1479 | |
Dan Williams | ba049e9 | 2016-01-15 16:56:11 -0800 | [diff] [blame] | 1480 | kvm_pfn_t gfn_to_pfn_atomic(struct kvm *kvm, gfn_t gfn) |
Paolo Bonzini | e37afc6 | 2015-05-19 16:09:04 +0200 | [diff] [blame] | 1481 | { |
| 1482 | return gfn_to_pfn_memslot_atomic(gfn_to_memslot(kvm, gfn), gfn); |
| 1483 | } |
| 1484 | EXPORT_SYMBOL_GPL(gfn_to_pfn_atomic); |
| 1485 | |
Dan Williams | ba049e9 | 2016-01-15 16:56:11 -0800 | [diff] [blame] | 1486 | kvm_pfn_t kvm_vcpu_gfn_to_pfn_atomic(struct kvm_vcpu *vcpu, gfn_t gfn) |
Paolo Bonzini | 8e73485 | 2015-05-17 13:58:53 +0200 | [diff] [blame] | 1487 | { |
| 1488 | return gfn_to_pfn_memslot_atomic(kvm_vcpu_gfn_to_memslot(vcpu, gfn), gfn); |
| 1489 | } |
| 1490 | EXPORT_SYMBOL_GPL(kvm_vcpu_gfn_to_pfn_atomic); |
| 1491 | |
Dan Williams | ba049e9 | 2016-01-15 16:56:11 -0800 | [diff] [blame] | 1492 | kvm_pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn) |
Paolo Bonzini | e37afc6 | 2015-05-19 16:09:04 +0200 | [diff] [blame] | 1493 | { |
| 1494 | return gfn_to_pfn_memslot(gfn_to_memslot(kvm, gfn), gfn); |
| 1495 | } |
| 1496 | EXPORT_SYMBOL_GPL(gfn_to_pfn); |
| 1497 | |
Dan Williams | ba049e9 | 2016-01-15 16:56:11 -0800 | [diff] [blame] | 1498 | kvm_pfn_t kvm_vcpu_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn) |
Paolo Bonzini | 8e73485 | 2015-05-17 13:58:53 +0200 | [diff] [blame] | 1499 | { |
| 1500 | return gfn_to_pfn_memslot(kvm_vcpu_gfn_to_memslot(vcpu, gfn), gfn); |
| 1501 | } |
| 1502 | EXPORT_SYMBOL_GPL(kvm_vcpu_gfn_to_pfn); |
| 1503 | |
Paolo Bonzini | d9ef13c | 2015-05-19 16:01:50 +0200 | [diff] [blame] | 1504 | int gfn_to_page_many_atomic(struct kvm_memory_slot *slot, gfn_t gfn, |
| 1505 | struct page **pages, int nr_pages) |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 1506 | { |
| 1507 | unsigned long addr; |
| 1508 | gfn_t entry; |
| 1509 | |
Paolo Bonzini | d9ef13c | 2015-05-19 16:01:50 +0200 | [diff] [blame] | 1510 | addr = gfn_to_hva_many(slot, gfn, &entry); |
Xiao Guangrong | 4898778 | 2010-08-22 19:11:43 +0800 | [diff] [blame] | 1511 | if (kvm_is_error_hva(addr)) |
| 1512 | return -1; |
| 1513 | |
| 1514 | if (entry < nr_pages) |
| 1515 | return 0; |
| 1516 | |
| 1517 | return __get_user_pages_fast(addr, nr_pages, 1, pages); |
| 1518 | } |
| 1519 | EXPORT_SYMBOL_GPL(gfn_to_page_many_atomic); |
| 1520 | |
Dan Williams | ba049e9 | 2016-01-15 16:56:11 -0800 | [diff] [blame] | 1521 | static struct page *kvm_pfn_to_page(kvm_pfn_t pfn) |
Xiao Guangrong | a276632 | 2012-07-26 11:58:59 +0800 | [diff] [blame] | 1522 | { |
Xiao Guangrong | 81c52c5 | 2012-10-16 20:10:59 +0800 | [diff] [blame] | 1523 | if (is_error_noslot_pfn(pfn)) |
Xiao Guangrong | 6cede2e | 2012-08-03 15:41:22 +0800 | [diff] [blame] | 1524 | return KVM_ERR_PTR_BAD_PAGE; |
Xiao Guangrong | a276632 | 2012-07-26 11:58:59 +0800 | [diff] [blame] | 1525 | |
Ard Biesheuvel | bf4bea8 | 2014-11-10 08:33:56 +0000 | [diff] [blame] | 1526 | if (kvm_is_reserved_pfn(pfn)) { |
Xiao Guangrong | cb9aaa3 | 2012-08-03 15:42:10 +0800 | [diff] [blame] | 1527 | WARN_ON(1); |
| 1528 | return KVM_ERR_PTR_BAD_PAGE; |
| 1529 | } |
| 1530 | |
Xiao Guangrong | a276632 | 2012-07-26 11:58:59 +0800 | [diff] [blame] | 1531 | return pfn_to_page(pfn); |
| 1532 | } |
| 1533 | |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1534 | struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn) |
| 1535 | { |
Dan Williams | ba049e9 | 2016-01-15 16:56:11 -0800 | [diff] [blame] | 1536 | kvm_pfn_t pfn; |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1537 | |
| 1538 | pfn = gfn_to_pfn(kvm, gfn); |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1539 | |
Xiao Guangrong | a276632 | 2012-07-26 11:58:59 +0800 | [diff] [blame] | 1540 | return kvm_pfn_to_page(pfn); |
Avi Kivity | 954bbbc | 2007-03-30 14:02:32 +0300 | [diff] [blame] | 1541 | } |
| 1542 | EXPORT_SYMBOL_GPL(gfn_to_page); |
| 1543 | |
Paolo Bonzini | 8e73485 | 2015-05-17 13:58:53 +0200 | [diff] [blame] | 1544 | struct page *kvm_vcpu_gfn_to_page(struct kvm_vcpu *vcpu, gfn_t gfn) |
| 1545 | { |
Dan Williams | ba049e9 | 2016-01-15 16:56:11 -0800 | [diff] [blame] | 1546 | kvm_pfn_t pfn; |
Paolo Bonzini | 8e73485 | 2015-05-17 13:58:53 +0200 | [diff] [blame] | 1547 | |
| 1548 | pfn = kvm_vcpu_gfn_to_pfn(vcpu, gfn); |
| 1549 | |
| 1550 | return kvm_pfn_to_page(pfn); |
| 1551 | } |
| 1552 | EXPORT_SYMBOL_GPL(kvm_vcpu_gfn_to_page); |
| 1553 | |
Izik Eidus | b4231d6 | 2007-11-20 11:49:33 +0200 | [diff] [blame] | 1554 | void kvm_release_page_clean(struct page *page) |
| 1555 | { |
Xiao Guangrong | 32cad84 | 2012-08-03 15:42:52 +0800 | [diff] [blame] | 1556 | WARN_ON(is_error_page(page)); |
| 1557 | |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1558 | kvm_release_pfn_clean(page_to_pfn(page)); |
Izik Eidus | b4231d6 | 2007-11-20 11:49:33 +0200 | [diff] [blame] | 1559 | } |
| 1560 | EXPORT_SYMBOL_GPL(kvm_release_page_clean); |
| 1561 | |
Dan Williams | ba049e9 | 2016-01-15 16:56:11 -0800 | [diff] [blame] | 1562 | void kvm_release_pfn_clean(kvm_pfn_t pfn) |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1563 | { |
Ard Biesheuvel | bf4bea8 | 2014-11-10 08:33:56 +0000 | [diff] [blame] | 1564 | if (!is_error_noslot_pfn(pfn) && !kvm_is_reserved_pfn(pfn)) |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1565 | put_page(pfn_to_page(pfn)); |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1566 | } |
| 1567 | EXPORT_SYMBOL_GPL(kvm_release_pfn_clean); |
| 1568 | |
Izik Eidus | b4231d6 | 2007-11-20 11:49:33 +0200 | [diff] [blame] | 1569 | void kvm_release_page_dirty(struct page *page) |
Izik Eidus | 8a7ae05 | 2007-10-18 11:09:33 +0200 | [diff] [blame] | 1570 | { |
Xiao Guangrong | a276632 | 2012-07-26 11:58:59 +0800 | [diff] [blame] | 1571 | WARN_ON(is_error_page(page)); |
| 1572 | |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1573 | kvm_release_pfn_dirty(page_to_pfn(page)); |
Izik Eidus | 8a7ae05 | 2007-10-18 11:09:33 +0200 | [diff] [blame] | 1574 | } |
Izik Eidus | b4231d6 | 2007-11-20 11:49:33 +0200 | [diff] [blame] | 1575 | EXPORT_SYMBOL_GPL(kvm_release_page_dirty); |
Izik Eidus | 8a7ae05 | 2007-10-18 11:09:33 +0200 | [diff] [blame] | 1576 | |
Dan Williams | ba049e9 | 2016-01-15 16:56:11 -0800 | [diff] [blame] | 1577 | static void kvm_release_pfn_dirty(kvm_pfn_t pfn) |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1578 | { |
| 1579 | kvm_set_pfn_dirty(pfn); |
| 1580 | kvm_release_pfn_clean(pfn); |
| 1581 | } |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1582 | |
Dan Williams | ba049e9 | 2016-01-15 16:56:11 -0800 | [diff] [blame] | 1583 | void kvm_set_pfn_dirty(kvm_pfn_t pfn) |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1584 | { |
Ard Biesheuvel | bf4bea8 | 2014-11-10 08:33:56 +0000 | [diff] [blame] | 1585 | if (!kvm_is_reserved_pfn(pfn)) { |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1586 | struct page *page = pfn_to_page(pfn); |
Xiubo Li | f95ef0c | 2015-02-26 14:58:23 +0800 | [diff] [blame] | 1587 | |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1588 | if (!PageReserved(page)) |
| 1589 | SetPageDirty(page); |
| 1590 | } |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1591 | } |
| 1592 | EXPORT_SYMBOL_GPL(kvm_set_pfn_dirty); |
| 1593 | |
Dan Williams | ba049e9 | 2016-01-15 16:56:11 -0800 | [diff] [blame] | 1594 | void kvm_set_pfn_accessed(kvm_pfn_t pfn) |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1595 | { |
Ard Biesheuvel | bf4bea8 | 2014-11-10 08:33:56 +0000 | [diff] [blame] | 1596 | if (!kvm_is_reserved_pfn(pfn)) |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1597 | mark_page_accessed(pfn_to_page(pfn)); |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1598 | } |
| 1599 | EXPORT_SYMBOL_GPL(kvm_set_pfn_accessed); |
| 1600 | |
Dan Williams | ba049e9 | 2016-01-15 16:56:11 -0800 | [diff] [blame] | 1601 | void kvm_get_pfn(kvm_pfn_t pfn) |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1602 | { |
Ard Biesheuvel | bf4bea8 | 2014-11-10 08:33:56 +0000 | [diff] [blame] | 1603 | if (!kvm_is_reserved_pfn(pfn)) |
Anthony Liguori | 2e2e373 | 2008-04-30 15:37:07 -0500 | [diff] [blame] | 1604 | get_page(pfn_to_page(pfn)); |
Anthony Liguori | 35149e2 | 2008-04-02 14:46:56 -0500 | [diff] [blame] | 1605 | } |
| 1606 | EXPORT_SYMBOL_GPL(kvm_get_pfn); |
| 1607 | |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1608 | static int next_segment(unsigned long len, int offset) |
| 1609 | { |
| 1610 | if (len > PAGE_SIZE - offset) |
| 1611 | return PAGE_SIZE - offset; |
| 1612 | else |
| 1613 | return len; |
| 1614 | } |
| 1615 | |
Paolo Bonzini | 8e73485 | 2015-05-17 13:58:53 +0200 | [diff] [blame] | 1616 | static int __kvm_read_guest_page(struct kvm_memory_slot *slot, gfn_t gfn, |
| 1617 | void *data, int offset, int len) |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1618 | { |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1619 | int r; |
| 1620 | unsigned long addr; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1621 | |
Paolo Bonzini | 8e73485 | 2015-05-17 13:58:53 +0200 | [diff] [blame] | 1622 | addr = gfn_to_hva_memslot_prot(slot, gfn, NULL); |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1623 | if (kvm_is_error_hva(addr)) |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1624 | return -EFAULT; |
Paolo Bonzini | 3180a7f | 2015-04-02 14:08:20 +0200 | [diff] [blame] | 1625 | r = __copy_from_user(data, (void __user *)addr + offset, len); |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1626 | if (r) |
| 1627 | return -EFAULT; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1628 | return 0; |
| 1629 | } |
Paolo Bonzini | 8e73485 | 2015-05-17 13:58:53 +0200 | [diff] [blame] | 1630 | |
| 1631 | int kvm_read_guest_page(struct kvm *kvm, gfn_t gfn, void *data, int offset, |
| 1632 | int len) |
| 1633 | { |
| 1634 | struct kvm_memory_slot *slot = gfn_to_memslot(kvm, gfn); |
| 1635 | |
| 1636 | return __kvm_read_guest_page(slot, gfn, data, offset, len); |
| 1637 | } |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1638 | EXPORT_SYMBOL_GPL(kvm_read_guest_page); |
| 1639 | |
Paolo Bonzini | 8e73485 | 2015-05-17 13:58:53 +0200 | [diff] [blame] | 1640 | int kvm_vcpu_read_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, void *data, |
| 1641 | int offset, int len) |
| 1642 | { |
| 1643 | struct kvm_memory_slot *slot = kvm_vcpu_gfn_to_memslot(vcpu, gfn); |
| 1644 | |
| 1645 | return __kvm_read_guest_page(slot, gfn, data, offset, len); |
| 1646 | } |
| 1647 | EXPORT_SYMBOL_GPL(kvm_vcpu_read_guest_page); |
| 1648 | |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1649 | int kvm_read_guest(struct kvm *kvm, gpa_t gpa, void *data, unsigned long len) |
| 1650 | { |
| 1651 | gfn_t gfn = gpa >> PAGE_SHIFT; |
| 1652 | int seg; |
| 1653 | int offset = offset_in_page(gpa); |
| 1654 | int ret; |
| 1655 | |
| 1656 | while ((seg = next_segment(len, offset)) != 0) { |
| 1657 | ret = kvm_read_guest_page(kvm, gfn, data, offset, seg); |
| 1658 | if (ret < 0) |
| 1659 | return ret; |
| 1660 | offset = 0; |
| 1661 | len -= seg; |
| 1662 | data += seg; |
| 1663 | ++gfn; |
| 1664 | } |
| 1665 | return 0; |
| 1666 | } |
| 1667 | EXPORT_SYMBOL_GPL(kvm_read_guest); |
| 1668 | |
Paolo Bonzini | 8e73485 | 2015-05-17 13:58:53 +0200 | [diff] [blame] | 1669 | int kvm_vcpu_read_guest(struct kvm_vcpu *vcpu, gpa_t gpa, void *data, unsigned long len) |
| 1670 | { |
| 1671 | gfn_t gfn = gpa >> PAGE_SHIFT; |
| 1672 | int seg; |
| 1673 | int offset = offset_in_page(gpa); |
| 1674 | int ret; |
| 1675 | |
| 1676 | while ((seg = next_segment(len, offset)) != 0) { |
| 1677 | ret = kvm_vcpu_read_guest_page(vcpu, gfn, data, offset, seg); |
| 1678 | if (ret < 0) |
| 1679 | return ret; |
| 1680 | offset = 0; |
| 1681 | len -= seg; |
| 1682 | data += seg; |
| 1683 | ++gfn; |
| 1684 | } |
| 1685 | return 0; |
| 1686 | } |
| 1687 | EXPORT_SYMBOL_GPL(kvm_vcpu_read_guest); |
| 1688 | |
| 1689 | static int __kvm_read_guest_atomic(struct kvm_memory_slot *slot, gfn_t gfn, |
| 1690 | void *data, int offset, unsigned long len) |
Marcelo Tosatti | 7ec5458 | 2007-12-20 19:18:23 -0500 | [diff] [blame] | 1691 | { |
| 1692 | int r; |
| 1693 | unsigned long addr; |
Marcelo Tosatti | 7ec5458 | 2007-12-20 19:18:23 -0500 | [diff] [blame] | 1694 | |
Paolo Bonzini | 8e73485 | 2015-05-17 13:58:53 +0200 | [diff] [blame] | 1695 | addr = gfn_to_hva_memslot_prot(slot, gfn, NULL); |
Marcelo Tosatti | 7ec5458 | 2007-12-20 19:18:23 -0500 | [diff] [blame] | 1696 | if (kvm_is_error_hva(addr)) |
| 1697 | return -EFAULT; |
Andrea Arcangeli | 0aac03f | 2008-01-30 19:57:35 +0100 | [diff] [blame] | 1698 | pagefault_disable(); |
Paolo Bonzini | 3180a7f | 2015-04-02 14:08:20 +0200 | [diff] [blame] | 1699 | r = __copy_from_user_inatomic(data, (void __user *)addr + offset, len); |
Andrea Arcangeli | 0aac03f | 2008-01-30 19:57:35 +0100 | [diff] [blame] | 1700 | pagefault_enable(); |
Marcelo Tosatti | 7ec5458 | 2007-12-20 19:18:23 -0500 | [diff] [blame] | 1701 | if (r) |
| 1702 | return -EFAULT; |
| 1703 | return 0; |
| 1704 | } |
Marcelo Tosatti | 7ec5458 | 2007-12-20 19:18:23 -0500 | [diff] [blame] | 1705 | |
Paolo Bonzini | 8e73485 | 2015-05-17 13:58:53 +0200 | [diff] [blame] | 1706 | int kvm_read_guest_atomic(struct kvm *kvm, gpa_t gpa, void *data, |
| 1707 | unsigned long len) |
| 1708 | { |
| 1709 | gfn_t gfn = gpa >> PAGE_SHIFT; |
| 1710 | struct kvm_memory_slot *slot = gfn_to_memslot(kvm, gfn); |
| 1711 | int offset = offset_in_page(gpa); |
| 1712 | |
| 1713 | return __kvm_read_guest_atomic(slot, gfn, data, offset, len); |
| 1714 | } |
| 1715 | EXPORT_SYMBOL_GPL(kvm_read_guest_atomic); |
| 1716 | |
| 1717 | int kvm_vcpu_read_guest_atomic(struct kvm_vcpu *vcpu, gpa_t gpa, |
| 1718 | void *data, unsigned long len) |
| 1719 | { |
| 1720 | gfn_t gfn = gpa >> PAGE_SHIFT; |
| 1721 | struct kvm_memory_slot *slot = kvm_vcpu_gfn_to_memslot(vcpu, gfn); |
| 1722 | int offset = offset_in_page(gpa); |
| 1723 | |
| 1724 | return __kvm_read_guest_atomic(slot, gfn, data, offset, len); |
| 1725 | } |
| 1726 | EXPORT_SYMBOL_GPL(kvm_vcpu_read_guest_atomic); |
| 1727 | |
| 1728 | static int __kvm_write_guest_page(struct kvm_memory_slot *memslot, gfn_t gfn, |
| 1729 | const void *data, int offset, int len) |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1730 | { |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1731 | int r; |
| 1732 | unsigned long addr; |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1733 | |
Radim Krčmář | 251eb84 | 2015-04-10 21:47:27 +0200 | [diff] [blame] | 1734 | addr = gfn_to_hva_memslot(memslot, gfn); |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1735 | if (kvm_is_error_hva(addr)) |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1736 | return -EFAULT; |
Xiao Guangrong | 8b0cedf | 2011-05-15 23:22:04 +0800 | [diff] [blame] | 1737 | r = __copy_to_user((void __user *)addr + offset, data, len); |
Izik Eidus | e0506bc | 2007-11-11 22:10:22 +0200 | [diff] [blame] | 1738 | if (r) |
| 1739 | return -EFAULT; |
Paolo Bonzini | bc009e4 | 2015-05-26 12:43:41 +0200 | [diff] [blame] | 1740 | mark_page_dirty_in_slot(memslot, gfn); |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1741 | return 0; |
| 1742 | } |
Paolo Bonzini | 8e73485 | 2015-05-17 13:58:53 +0200 | [diff] [blame] | 1743 | |
| 1744 | int kvm_write_guest_page(struct kvm *kvm, gfn_t gfn, |
| 1745 | const void *data, int offset, int len) |
| 1746 | { |
| 1747 | struct kvm_memory_slot *slot = gfn_to_memslot(kvm, gfn); |
| 1748 | |
| 1749 | return __kvm_write_guest_page(slot, gfn, data, offset, len); |
| 1750 | } |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1751 | EXPORT_SYMBOL_GPL(kvm_write_guest_page); |
| 1752 | |
Paolo Bonzini | 8e73485 | 2015-05-17 13:58:53 +0200 | [diff] [blame] | 1753 | int kvm_vcpu_write_guest_page(struct kvm_vcpu *vcpu, gfn_t gfn, |
| 1754 | const void *data, int offset, int len) |
| 1755 | { |
| 1756 | struct kvm_memory_slot *slot = kvm_vcpu_gfn_to_memslot(vcpu, gfn); |
| 1757 | |
| 1758 | return __kvm_write_guest_page(slot, gfn, data, offset, len); |
| 1759 | } |
| 1760 | EXPORT_SYMBOL_GPL(kvm_vcpu_write_guest_page); |
| 1761 | |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1762 | int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, |
| 1763 | unsigned long len) |
| 1764 | { |
| 1765 | gfn_t gfn = gpa >> PAGE_SHIFT; |
| 1766 | int seg; |
| 1767 | int offset = offset_in_page(gpa); |
| 1768 | int ret; |
| 1769 | |
| 1770 | while ((seg = next_segment(len, offset)) != 0) { |
| 1771 | ret = kvm_write_guest_page(kvm, gfn, data, offset, seg); |
| 1772 | if (ret < 0) |
| 1773 | return ret; |
| 1774 | offset = 0; |
| 1775 | len -= seg; |
| 1776 | data += seg; |
| 1777 | ++gfn; |
| 1778 | } |
| 1779 | return 0; |
| 1780 | } |
Wincy Van | ff651cb | 2014-12-11 08:52:58 +0300 | [diff] [blame] | 1781 | EXPORT_SYMBOL_GPL(kvm_write_guest); |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1782 | |
Paolo Bonzini | 8e73485 | 2015-05-17 13:58:53 +0200 | [diff] [blame] | 1783 | int kvm_vcpu_write_guest(struct kvm_vcpu *vcpu, gpa_t gpa, const void *data, |
| 1784 | unsigned long len) |
| 1785 | { |
| 1786 | gfn_t gfn = gpa >> PAGE_SHIFT; |
| 1787 | int seg; |
| 1788 | int offset = offset_in_page(gpa); |
| 1789 | int ret; |
| 1790 | |
| 1791 | while ((seg = next_segment(len, offset)) != 0) { |
| 1792 | ret = kvm_vcpu_write_guest_page(vcpu, gfn, data, offset, seg); |
| 1793 | if (ret < 0) |
| 1794 | return ret; |
| 1795 | offset = 0; |
| 1796 | len -= seg; |
| 1797 | data += seg; |
| 1798 | ++gfn; |
| 1799 | } |
| 1800 | return 0; |
| 1801 | } |
| 1802 | EXPORT_SYMBOL_GPL(kvm_vcpu_write_guest); |
| 1803 | |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1804 | 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] | 1805 | gpa_t gpa, unsigned long len) |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1806 | { |
| 1807 | struct kvm_memslots *slots = kvm_memslots(kvm); |
| 1808 | int offset = offset_in_page(gpa); |
Andrew Honig | 8f96452 | 2013-03-29 09:35:21 -0700 | [diff] [blame] | 1809 | gfn_t start_gfn = gpa >> PAGE_SHIFT; |
| 1810 | gfn_t end_gfn = (gpa + len - 1) >> PAGE_SHIFT; |
| 1811 | gfn_t nr_pages_needed = end_gfn - start_gfn + 1; |
| 1812 | gfn_t nr_pages_avail; |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1813 | |
| 1814 | ghc->gpa = gpa; |
| 1815 | ghc->generation = slots->generation; |
Andrew Honig | 8f96452 | 2013-03-29 09:35:21 -0700 | [diff] [blame] | 1816 | ghc->len = len; |
| 1817 | ghc->memslot = gfn_to_memslot(kvm, start_gfn); |
Radim Krčmář | ca3f087 | 2015-04-08 14:16:48 +0200 | [diff] [blame] | 1818 | ghc->hva = gfn_to_hva_many(ghc->memslot, start_gfn, NULL); |
| 1819 | if (!kvm_is_error_hva(ghc->hva) && nr_pages_needed <= 1) { |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1820 | ghc->hva += offset; |
Andrew Honig | 8f96452 | 2013-03-29 09:35:21 -0700 | [diff] [blame] | 1821 | } else { |
| 1822 | /* |
| 1823 | * If the requested region crosses two memslots, we still |
| 1824 | * verify that the entire region is valid here. |
| 1825 | */ |
| 1826 | while (start_gfn <= end_gfn) { |
| 1827 | ghc->memslot = gfn_to_memslot(kvm, start_gfn); |
| 1828 | ghc->hva = gfn_to_hva_many(ghc->memslot, start_gfn, |
| 1829 | &nr_pages_avail); |
| 1830 | if (kvm_is_error_hva(ghc->hva)) |
| 1831 | return -EFAULT; |
| 1832 | start_gfn += nr_pages_avail; |
| 1833 | } |
| 1834 | /* Use the slow path for cross page reads and writes. */ |
| 1835 | ghc->memslot = NULL; |
| 1836 | } |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1837 | return 0; |
| 1838 | } |
| 1839 | EXPORT_SYMBOL_GPL(kvm_gfn_to_hva_cache_init); |
| 1840 | |
| 1841 | int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, |
| 1842 | void *data, unsigned long len) |
| 1843 | { |
| 1844 | struct kvm_memslots *slots = kvm_memslots(kvm); |
| 1845 | int r; |
| 1846 | |
Andrew Honig | 8f96452 | 2013-03-29 09:35:21 -0700 | [diff] [blame] | 1847 | BUG_ON(len > ghc->len); |
| 1848 | |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1849 | if (slots->generation != ghc->generation) |
Andrew Honig | 8f96452 | 2013-03-29 09:35:21 -0700 | [diff] [blame] | 1850 | kvm_gfn_to_hva_cache_init(kvm, ghc, ghc->gpa, ghc->len); |
| 1851 | |
| 1852 | if (unlikely(!ghc->memslot)) |
| 1853 | return kvm_write_guest(kvm, ghc->gpa, data, len); |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1854 | |
| 1855 | if (kvm_is_error_hva(ghc->hva)) |
| 1856 | return -EFAULT; |
| 1857 | |
Xiao Guangrong | 8b0cedf | 2011-05-15 23:22:04 +0800 | [diff] [blame] | 1858 | r = __copy_to_user((void __user *)ghc->hva, data, len); |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1859 | if (r) |
| 1860 | return -EFAULT; |
Paolo Bonzini | bc009e4 | 2015-05-26 12:43:41 +0200 | [diff] [blame] | 1861 | mark_page_dirty_in_slot(ghc->memslot, ghc->gpa >> PAGE_SHIFT); |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1862 | |
| 1863 | return 0; |
| 1864 | } |
| 1865 | EXPORT_SYMBOL_GPL(kvm_write_guest_cached); |
| 1866 | |
Gleb Natapov | e03b644 | 2011-07-11 15:28:11 -0400 | [diff] [blame] | 1867 | int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, |
| 1868 | void *data, unsigned long len) |
| 1869 | { |
| 1870 | struct kvm_memslots *slots = kvm_memslots(kvm); |
| 1871 | int r; |
| 1872 | |
Andrew Honig | 8f96452 | 2013-03-29 09:35:21 -0700 | [diff] [blame] | 1873 | BUG_ON(len > ghc->len); |
| 1874 | |
Gleb Natapov | e03b644 | 2011-07-11 15:28:11 -0400 | [diff] [blame] | 1875 | if (slots->generation != ghc->generation) |
Andrew Honig | 8f96452 | 2013-03-29 09:35:21 -0700 | [diff] [blame] | 1876 | kvm_gfn_to_hva_cache_init(kvm, ghc, ghc->gpa, ghc->len); |
| 1877 | |
| 1878 | if (unlikely(!ghc->memslot)) |
| 1879 | return kvm_read_guest(kvm, ghc->gpa, data, len); |
Gleb Natapov | e03b644 | 2011-07-11 15:28:11 -0400 | [diff] [blame] | 1880 | |
| 1881 | if (kvm_is_error_hva(ghc->hva)) |
| 1882 | return -EFAULT; |
| 1883 | |
| 1884 | r = __copy_from_user(data, (void __user *)ghc->hva, len); |
| 1885 | if (r) |
| 1886 | return -EFAULT; |
| 1887 | |
| 1888 | return 0; |
| 1889 | } |
| 1890 | EXPORT_SYMBOL_GPL(kvm_read_guest_cached); |
| 1891 | |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1892 | int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len) |
| 1893 | { |
Heiko Carstens | 8a3caa6 | 2013-11-18 10:35:55 +0100 | [diff] [blame] | 1894 | const void *zero_page = (const void *) __va(page_to_phys(ZERO_PAGE(0))); |
| 1895 | |
| 1896 | return kvm_write_guest_page(kvm, gfn, zero_page, offset, len); |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1897 | } |
| 1898 | EXPORT_SYMBOL_GPL(kvm_clear_guest_page); |
| 1899 | |
| 1900 | int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len) |
| 1901 | { |
| 1902 | gfn_t gfn = gpa >> PAGE_SHIFT; |
| 1903 | int seg; |
| 1904 | int offset = offset_in_page(gpa); |
| 1905 | int ret; |
| 1906 | |
Kevin Mulvey | bfda0e8 | 2015-02-20 08:21:36 -0500 | [diff] [blame] | 1907 | while ((seg = next_segment(len, offset)) != 0) { |
Izik Eidus | 195aefd | 2007-10-01 22:14:18 +0200 | [diff] [blame] | 1908 | ret = kvm_clear_guest_page(kvm, gfn, offset, seg); |
| 1909 | if (ret < 0) |
| 1910 | return ret; |
| 1911 | offset = 0; |
| 1912 | len -= seg; |
| 1913 | ++gfn; |
| 1914 | } |
| 1915 | return 0; |
| 1916 | } |
| 1917 | EXPORT_SYMBOL_GPL(kvm_clear_guest); |
| 1918 | |
Paolo Bonzini | bc009e4 | 2015-05-26 12:43:41 +0200 | [diff] [blame] | 1919 | static void mark_page_dirty_in_slot(struct kvm_memory_slot *memslot, |
Stephen Hemminger | 7940876 | 2013-12-29 12:12:29 -0800 | [diff] [blame] | 1920 | gfn_t gfn) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1921 | { |
Rusty Russell | 7e9d619 | 2007-07-31 20:41:14 +1000 | [diff] [blame] | 1922 | if (memslot && memslot->dirty_bitmap) { |
| 1923 | unsigned long rel_gfn = gfn - memslot->base_gfn; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1924 | |
Takuya Yoshikawa | b74ca3b | 2012-10-04 17:13:12 -0700 | [diff] [blame] | 1925 | set_bit_le(rel_gfn, memslot->dirty_bitmap); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 1926 | } |
| 1927 | } |
| 1928 | |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1929 | void mark_page_dirty(struct kvm *kvm, gfn_t gfn) |
| 1930 | { |
| 1931 | struct kvm_memory_slot *memslot; |
| 1932 | |
| 1933 | memslot = gfn_to_memslot(kvm, gfn); |
Paolo Bonzini | bc009e4 | 2015-05-26 12:43:41 +0200 | [diff] [blame] | 1934 | mark_page_dirty_in_slot(memslot, gfn); |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1935 | } |
Aneesh Kumar K.V | 2ba9f0d | 2013-10-07 22:17:59 +0530 | [diff] [blame] | 1936 | EXPORT_SYMBOL_GPL(mark_page_dirty); |
Gleb Natapov | 49c7754 | 2010-10-18 15:22:23 +0200 | [diff] [blame] | 1937 | |
Paolo Bonzini | 8e73485 | 2015-05-17 13:58:53 +0200 | [diff] [blame] | 1938 | void kvm_vcpu_mark_page_dirty(struct kvm_vcpu *vcpu, gfn_t gfn) |
| 1939 | { |
| 1940 | struct kvm_memory_slot *memslot; |
| 1941 | |
| 1942 | memslot = kvm_vcpu_gfn_to_memslot(vcpu, gfn); |
| 1943 | mark_page_dirty_in_slot(memslot, gfn); |
| 1944 | } |
| 1945 | EXPORT_SYMBOL_GPL(kvm_vcpu_mark_page_dirty); |
| 1946 | |
Wanpeng Li | aca6ff2 | 2015-09-03 22:07:38 +0800 | [diff] [blame] | 1947 | static void grow_halt_poll_ns(struct kvm_vcpu *vcpu) |
| 1948 | { |
Christian Borntraeger | 6b6de68 | 2016-02-09 13:47:55 +0100 | [diff] [blame] | 1949 | unsigned int old, val, grow; |
Wanpeng Li | aca6ff2 | 2015-09-03 22:07:38 +0800 | [diff] [blame] | 1950 | |
Wanpeng Li | 2cbd782 | 2015-09-03 22:07:39 +0800 | [diff] [blame] | 1951 | old = val = vcpu->halt_poll_ns; |
Christian Borntraeger | 6b6de68 | 2016-02-09 13:47:55 +0100 | [diff] [blame] | 1952 | grow = READ_ONCE(halt_poll_ns_grow); |
Wanpeng Li | aca6ff2 | 2015-09-03 22:07:38 +0800 | [diff] [blame] | 1953 | /* 10us base */ |
Christian Borntraeger | 6b6de68 | 2016-02-09 13:47:55 +0100 | [diff] [blame] | 1954 | if (val == 0 && grow) |
Wanpeng Li | aca6ff2 | 2015-09-03 22:07:38 +0800 | [diff] [blame] | 1955 | val = 10000; |
| 1956 | else |
Christian Borntraeger | 6b6de68 | 2016-02-09 13:47:55 +0100 | [diff] [blame] | 1957 | val *= grow; |
Wanpeng Li | aca6ff2 | 2015-09-03 22:07:38 +0800 | [diff] [blame] | 1958 | |
David Matlack | 313f636 | 2016-03-08 16:19:44 -0800 | [diff] [blame] | 1959 | if (val > halt_poll_ns) |
| 1960 | val = halt_poll_ns; |
| 1961 | |
Wanpeng Li | aca6ff2 | 2015-09-03 22:07:38 +0800 | [diff] [blame] | 1962 | vcpu->halt_poll_ns = val; |
Wanpeng Li | 2cbd782 | 2015-09-03 22:07:39 +0800 | [diff] [blame] | 1963 | trace_kvm_halt_poll_ns_grow(vcpu->vcpu_id, val, old); |
Wanpeng Li | aca6ff2 | 2015-09-03 22:07:38 +0800 | [diff] [blame] | 1964 | } |
| 1965 | |
| 1966 | static void shrink_halt_poll_ns(struct kvm_vcpu *vcpu) |
| 1967 | { |
Christian Borntraeger | 6b6de68 | 2016-02-09 13:47:55 +0100 | [diff] [blame] | 1968 | unsigned int old, val, shrink; |
Wanpeng Li | aca6ff2 | 2015-09-03 22:07:38 +0800 | [diff] [blame] | 1969 | |
Wanpeng Li | 2cbd782 | 2015-09-03 22:07:39 +0800 | [diff] [blame] | 1970 | old = val = vcpu->halt_poll_ns; |
Christian Borntraeger | 6b6de68 | 2016-02-09 13:47:55 +0100 | [diff] [blame] | 1971 | shrink = READ_ONCE(halt_poll_ns_shrink); |
| 1972 | if (shrink == 0) |
Wanpeng Li | aca6ff2 | 2015-09-03 22:07:38 +0800 | [diff] [blame] | 1973 | val = 0; |
| 1974 | else |
Christian Borntraeger | 6b6de68 | 2016-02-09 13:47:55 +0100 | [diff] [blame] | 1975 | val /= shrink; |
Wanpeng Li | aca6ff2 | 2015-09-03 22:07:38 +0800 | [diff] [blame] | 1976 | |
| 1977 | vcpu->halt_poll_ns = val; |
Wanpeng Li | 2cbd782 | 2015-09-03 22:07:39 +0800 | [diff] [blame] | 1978 | trace_kvm_halt_poll_ns_shrink(vcpu->vcpu_id, val, old); |
Wanpeng Li | aca6ff2 | 2015-09-03 22:07:38 +0800 | [diff] [blame] | 1979 | } |
| 1980 | |
Paolo Bonzini | f781951 | 2015-02-04 18:20:58 +0100 | [diff] [blame] | 1981 | static int kvm_vcpu_check_block(struct kvm_vcpu *vcpu) |
| 1982 | { |
| 1983 | if (kvm_arch_vcpu_runnable(vcpu)) { |
| 1984 | kvm_make_request(KVM_REQ_UNHALT, vcpu); |
| 1985 | return -EINTR; |
| 1986 | } |
| 1987 | if (kvm_cpu_has_pending_timer(vcpu)) |
| 1988 | return -EINTR; |
| 1989 | if (signal_pending(current)) |
| 1990 | return -EINTR; |
| 1991 | |
| 1992 | return 0; |
| 1993 | } |
| 1994 | |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1995 | /* |
| 1996 | * The vCPU has executed a HLT instruction with in-kernel mode enabled. |
| 1997 | */ |
Hollis Blanchard | 8776e51 | 2007-10-31 17:24:24 -0500 | [diff] [blame] | 1998 | void kvm_vcpu_block(struct kvm_vcpu *vcpu) |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 1999 | { |
Paolo Bonzini | f781951 | 2015-02-04 18:20:58 +0100 | [diff] [blame] | 2000 | ktime_t start, cur; |
Marcelo Tosatti | 8577370 | 2016-02-19 09:46:39 +0100 | [diff] [blame] | 2001 | DECLARE_SWAITQUEUE(wait); |
Paolo Bonzini | f781951 | 2015-02-04 18:20:58 +0100 | [diff] [blame] | 2002 | bool waited = false; |
Wanpeng Li | aca6ff2 | 2015-09-03 22:07:38 +0800 | [diff] [blame] | 2003 | u64 block_ns; |
Paolo Bonzini | f781951 | 2015-02-04 18:20:58 +0100 | [diff] [blame] | 2004 | |
| 2005 | start = cur = ktime_get(); |
Wanpeng Li | 19020f8 | 2015-09-03 22:07:37 +0800 | [diff] [blame] | 2006 | if (vcpu->halt_poll_ns) { |
| 2007 | ktime_t stop = ktime_add_ns(ktime_get(), vcpu->halt_poll_ns); |
Xiubo Li | f95ef0c | 2015-02-26 14:58:23 +0800 | [diff] [blame] | 2008 | |
Paolo Bonzini | 62bea5b | 2015-09-15 18:27:57 +0200 | [diff] [blame] | 2009 | ++vcpu->stat.halt_attempted_poll; |
Paolo Bonzini | f781951 | 2015-02-04 18:20:58 +0100 | [diff] [blame] | 2010 | do { |
| 2011 | /* |
| 2012 | * This sets KVM_REQ_UNHALT if an interrupt |
| 2013 | * arrives. |
| 2014 | */ |
| 2015 | if (kvm_vcpu_check_block(vcpu) < 0) { |
| 2016 | ++vcpu->stat.halt_successful_poll; |
| 2017 | goto out; |
| 2018 | } |
| 2019 | cur = ktime_get(); |
| 2020 | } while (single_task_running() && ktime_before(cur, stop)); |
| 2021 | } |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 2022 | |
Christoffer Dall | 3217f7c | 2015-08-27 16:41:15 +0200 | [diff] [blame] | 2023 | kvm_arch_vcpu_blocking(vcpu); |
| 2024 | |
Marcelo Tosatti | e5c239c | 2008-05-08 19:47:01 -0300 | [diff] [blame] | 2025 | for (;;) { |
Marcelo Tosatti | 8577370 | 2016-02-19 09:46:39 +0100 | [diff] [blame] | 2026 | prepare_to_swait(&vcpu->wq, &wait, TASK_INTERRUPTIBLE); |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 2027 | |
Paolo Bonzini | f781951 | 2015-02-04 18:20:58 +0100 | [diff] [blame] | 2028 | if (kvm_vcpu_check_block(vcpu) < 0) |
Marcelo Tosatti | e5c239c | 2008-05-08 19:47:01 -0300 | [diff] [blame] | 2029 | break; |
| 2030 | |
Paolo Bonzini | f781951 | 2015-02-04 18:20:58 +0100 | [diff] [blame] | 2031 | waited = true; |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 2032 | schedule(); |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 2033 | } |
| 2034 | |
Marcelo Tosatti | 8577370 | 2016-02-19 09:46:39 +0100 | [diff] [blame] | 2035 | finish_swait(&vcpu->wq, &wait); |
Paolo Bonzini | f781951 | 2015-02-04 18:20:58 +0100 | [diff] [blame] | 2036 | cur = ktime_get(); |
| 2037 | |
Christoffer Dall | 3217f7c | 2015-08-27 16:41:15 +0200 | [diff] [blame] | 2038 | kvm_arch_vcpu_unblocking(vcpu); |
Paolo Bonzini | f781951 | 2015-02-04 18:20:58 +0100 | [diff] [blame] | 2039 | out: |
Wanpeng Li | aca6ff2 | 2015-09-03 22:07:38 +0800 | [diff] [blame] | 2040 | block_ns = ktime_to_ns(cur) - ktime_to_ns(start); |
| 2041 | |
| 2042 | if (halt_poll_ns) { |
| 2043 | if (block_ns <= vcpu->halt_poll_ns) |
| 2044 | ; |
| 2045 | /* we had a long block, shrink polling */ |
| 2046 | else if (vcpu->halt_poll_ns && block_ns > halt_poll_ns) |
| 2047 | shrink_halt_poll_ns(vcpu); |
| 2048 | /* we had a short halt and our poll time is too small */ |
| 2049 | else if (vcpu->halt_poll_ns < halt_poll_ns && |
| 2050 | block_ns < halt_poll_ns) |
| 2051 | grow_halt_poll_ns(vcpu); |
Wanpeng Li | edb9272 | 2015-09-14 17:38:51 +0800 | [diff] [blame] | 2052 | } else |
| 2053 | vcpu->halt_poll_ns = 0; |
Wanpeng Li | aca6ff2 | 2015-09-03 22:07:38 +0800 | [diff] [blame] | 2054 | |
| 2055 | trace_kvm_vcpu_wakeup(block_ns, waited); |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 2056 | } |
Aneesh Kumar K.V | 2ba9f0d | 2013-10-07 22:17:59 +0530 | [diff] [blame] | 2057 | EXPORT_SYMBOL_GPL(kvm_vcpu_block); |
Eddie Dong | b6958ce | 2007-07-18 12:15:21 +0300 | [diff] [blame] | 2058 | |
Marcelo Tosatti | 8c84780 | 2012-03-14 17:58:48 -0300 | [diff] [blame] | 2059 | #ifndef CONFIG_S390 |
Christoffer Dall | b6d3383 | 2012-03-08 16:44:24 -0500 | [diff] [blame] | 2060 | /* |
| 2061 | * Kick a sleeping VCPU, or a guest VCPU in guest mode, into host kernel mode. |
| 2062 | */ |
| 2063 | void kvm_vcpu_kick(struct kvm_vcpu *vcpu) |
| 2064 | { |
| 2065 | int me; |
| 2066 | int cpu = vcpu->cpu; |
Marcelo Tosatti | 8577370 | 2016-02-19 09:46:39 +0100 | [diff] [blame] | 2067 | struct swait_queue_head *wqp; |
Christoffer Dall | b6d3383 | 2012-03-08 16:44:24 -0500 | [diff] [blame] | 2068 | |
| 2069 | wqp = kvm_arch_vcpu_wq(vcpu); |
Marcelo Tosatti | 8577370 | 2016-02-19 09:46:39 +0100 | [diff] [blame] | 2070 | if (swait_active(wqp)) { |
| 2071 | swake_up(wqp); |
Christoffer Dall | b6d3383 | 2012-03-08 16:44:24 -0500 | [diff] [blame] | 2072 | ++vcpu->stat.halt_wakeup; |
| 2073 | } |
| 2074 | |
| 2075 | me = get_cpu(); |
| 2076 | if (cpu != me && (unsigned)cpu < nr_cpu_ids && cpu_online(cpu)) |
| 2077 | if (kvm_arch_vcpu_should_kick(vcpu)) |
| 2078 | smp_send_reschedule(cpu); |
| 2079 | put_cpu(); |
| 2080 | } |
Yang Zhang | a20ed54 | 2013-04-11 19:25:15 +0800 | [diff] [blame] | 2081 | EXPORT_SYMBOL_GPL(kvm_vcpu_kick); |
Marcelo Tosatti | 8c84780 | 2012-03-14 17:58:48 -0300 | [diff] [blame] | 2082 | #endif /* !CONFIG_S390 */ |
Christoffer Dall | b6d3383 | 2012-03-08 16:44:24 -0500 | [diff] [blame] | 2083 | |
Dan Carpenter | fa93384 | 2014-05-23 13:20:42 +0300 | [diff] [blame] | 2084 | int kvm_vcpu_yield_to(struct kvm_vcpu *target) |
Konstantin Weitz | 41628d3 | 2012-04-25 15:30:38 +0200 | [diff] [blame] | 2085 | { |
| 2086 | struct pid *pid; |
| 2087 | struct task_struct *task = NULL; |
Dan Carpenter | fa93384 | 2014-05-23 13:20:42 +0300 | [diff] [blame] | 2088 | int ret = 0; |
Konstantin Weitz | 41628d3 | 2012-04-25 15:30:38 +0200 | [diff] [blame] | 2089 | |
| 2090 | rcu_read_lock(); |
| 2091 | pid = rcu_dereference(target->pid); |
| 2092 | if (pid) |
Sam Bobroff | 27fbe64b | 2014-09-19 09:40:41 +1000 | [diff] [blame] | 2093 | task = get_pid_task(pid, PIDTYPE_PID); |
Konstantin Weitz | 41628d3 | 2012-04-25 15:30:38 +0200 | [diff] [blame] | 2094 | rcu_read_unlock(); |
| 2095 | if (!task) |
Raghavendra K T | c45c528 | 2013-01-22 13:09:24 +0530 | [diff] [blame] | 2096 | return ret; |
Raghavendra K T | c45c528 | 2013-01-22 13:09:24 +0530 | [diff] [blame] | 2097 | ret = yield_to(task, 1); |
Konstantin Weitz | 41628d3 | 2012-04-25 15:30:38 +0200 | [diff] [blame] | 2098 | put_task_struct(task); |
Raghavendra K T | c45c528 | 2013-01-22 13:09:24 +0530 | [diff] [blame] | 2099 | |
| 2100 | return ret; |
Konstantin Weitz | 41628d3 | 2012-04-25 15:30:38 +0200 | [diff] [blame] | 2101 | } |
| 2102 | EXPORT_SYMBOL_GPL(kvm_vcpu_yield_to); |
| 2103 | |
Raghavendra K T | 06e48c5 | 2012-07-19 15:17:52 +0530 | [diff] [blame] | 2104 | /* |
| 2105 | * Helper that checks whether a VCPU is eligible for directed yield. |
| 2106 | * Most eligible candidate to yield is decided by following heuristics: |
| 2107 | * |
| 2108 | * (a) VCPU which has not done pl-exit or cpu relax intercepted recently |
| 2109 | * (preempted lock holder), indicated by @in_spin_loop. |
| 2110 | * Set at the beiginning and cleared at the end of interception/PLE handler. |
| 2111 | * |
| 2112 | * (b) VCPU which has done pl-exit/ cpu relax intercepted but did not get |
| 2113 | * chance last time (mostly it has become eligible now since we have probably |
| 2114 | * yielded to lockholder in last iteration. This is done by toggling |
| 2115 | * @dy_eligible each time a VCPU checked for eligibility.) |
| 2116 | * |
| 2117 | * Yielding to a recently pl-exited/cpu relax intercepted VCPU before yielding |
| 2118 | * to preempted lock-holder could result in wrong VCPU selection and CPU |
| 2119 | * burning. Giving priority for a potential lock-holder increases lock |
| 2120 | * progress. |
| 2121 | * |
| 2122 | * Since algorithm is based on heuristics, accessing another VCPU data without |
| 2123 | * locking does not harm. It may result in trying to yield to same VCPU, fail |
| 2124 | * and continue with next VCPU and so on. |
| 2125 | */ |
Stephen Hemminger | 7940876 | 2013-12-29 12:12:29 -0800 | [diff] [blame] | 2126 | 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] | 2127 | { |
Scott Wood | 4a55dd7 | 2014-01-09 18:43:16 -0600 | [diff] [blame] | 2128 | #ifdef CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT |
Raghavendra K T | 06e48c5 | 2012-07-19 15:17:52 +0530 | [diff] [blame] | 2129 | bool eligible; |
| 2130 | |
| 2131 | eligible = !vcpu->spin_loop.in_spin_loop || |
Christian Borntraeger | 3465611 | 2014-09-04 21:13:31 +0200 | [diff] [blame] | 2132 | vcpu->spin_loop.dy_eligible; |
Raghavendra K T | 06e48c5 | 2012-07-19 15:17:52 +0530 | [diff] [blame] | 2133 | |
| 2134 | if (vcpu->spin_loop.in_spin_loop) |
| 2135 | kvm_vcpu_set_dy_eligible(vcpu, !vcpu->spin_loop.dy_eligible); |
| 2136 | |
| 2137 | return eligible; |
Scott Wood | 4a55dd7 | 2014-01-09 18:43:16 -0600 | [diff] [blame] | 2138 | #else |
| 2139 | return true; |
Raghavendra K T | 06e48c5 | 2012-07-19 15:17:52 +0530 | [diff] [blame] | 2140 | #endif |
Scott Wood | 4a55dd7 | 2014-01-09 18:43:16 -0600 | [diff] [blame] | 2141 | } |
Raghavendra K T | c45c528 | 2013-01-22 13:09:24 +0530 | [diff] [blame] | 2142 | |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 2143 | void kvm_vcpu_on_spin(struct kvm_vcpu *me) |
Zhai, Edwin | d255f4f | 2009-10-09 18:03:20 +0800 | [diff] [blame] | 2144 | { |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 2145 | struct kvm *kvm = me->kvm; |
| 2146 | struct kvm_vcpu *vcpu; |
| 2147 | int last_boosted_vcpu = me->kvm->last_boosted_vcpu; |
| 2148 | int yielded = 0; |
Raghavendra K T | c45c528 | 2013-01-22 13:09:24 +0530 | [diff] [blame] | 2149 | int try = 3; |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 2150 | int pass; |
| 2151 | int i; |
Zhai, Edwin | d255f4f | 2009-10-09 18:03:20 +0800 | [diff] [blame] | 2152 | |
Raghavendra K T | 4c08849 | 2012-07-18 19:07:46 +0530 | [diff] [blame] | 2153 | kvm_vcpu_set_in_spin_loop(me, true); |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 2154 | /* |
| 2155 | * We boost the priority of a VCPU that is runnable but not |
| 2156 | * currently running, because it got preempted by something |
| 2157 | * else and called schedule in __vcpu_run. Hopefully that |
| 2158 | * VCPU is holding the lock that we need and will release it. |
| 2159 | * We approximate round-robin by starting at the last boosted VCPU. |
| 2160 | */ |
Raghavendra K T | c45c528 | 2013-01-22 13:09:24 +0530 | [diff] [blame] | 2161 | for (pass = 0; pass < 2 && !yielded && try; pass++) { |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 2162 | kvm_for_each_vcpu(i, vcpu, kvm) { |
Rik van Riel | 5cfc2aa | 2012-06-19 16:51:04 -0400 | [diff] [blame] | 2163 | if (!pass && i <= last_boosted_vcpu) { |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 2164 | i = last_boosted_vcpu; |
| 2165 | continue; |
| 2166 | } else if (pass && i > last_boosted_vcpu) |
| 2167 | break; |
Raghavendra K T | 7bc7ae2 | 2013-03-04 23:32:27 +0530 | [diff] [blame] | 2168 | if (!ACCESS_ONCE(vcpu->preempted)) |
| 2169 | continue; |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 2170 | if (vcpu == me) |
| 2171 | continue; |
Marcelo Tosatti | 8577370 | 2016-02-19 09:46:39 +0100 | [diff] [blame] | 2172 | if (swait_active(&vcpu->wq) && !kvm_arch_vcpu_runnable(vcpu)) |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 2173 | continue; |
Raghavendra K T | 06e48c5 | 2012-07-19 15:17:52 +0530 | [diff] [blame] | 2174 | if (!kvm_vcpu_eligible_for_directed_yield(vcpu)) |
| 2175 | continue; |
Raghavendra K T | c45c528 | 2013-01-22 13:09:24 +0530 | [diff] [blame] | 2176 | |
| 2177 | yielded = kvm_vcpu_yield_to(vcpu); |
| 2178 | if (yielded > 0) { |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 2179 | kvm->last_boosted_vcpu = i; |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 2180 | break; |
Raghavendra K T | c45c528 | 2013-01-22 13:09:24 +0530 | [diff] [blame] | 2181 | } else if (yielded < 0) { |
| 2182 | try--; |
| 2183 | if (!try) |
| 2184 | break; |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 2185 | } |
Rik van Riel | 217ece6 | 2011-02-01 09:53:28 -0500 | [diff] [blame] | 2186 | } |
| 2187 | } |
Raghavendra K T | 4c08849 | 2012-07-18 19:07:46 +0530 | [diff] [blame] | 2188 | kvm_vcpu_set_in_spin_loop(me, false); |
Raghavendra K T | 06e48c5 | 2012-07-19 15:17:52 +0530 | [diff] [blame] | 2189 | |
| 2190 | /* Ensure vcpu is not eligible during next spinloop */ |
| 2191 | kvm_vcpu_set_dy_eligible(me, false); |
Zhai, Edwin | d255f4f | 2009-10-09 18:03:20 +0800 | [diff] [blame] | 2192 | } |
| 2193 | EXPORT_SYMBOL_GPL(kvm_vcpu_on_spin); |
| 2194 | |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 2195 | 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] | 2196 | { |
| 2197 | struct kvm_vcpu *vcpu = vma->vm_file->private_data; |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 2198 | struct page *page; |
| 2199 | |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 2200 | if (vmf->pgoff == 0) |
Avi Kivity | 039576c | 2007-03-20 12:46:50 +0200 | [diff] [blame] | 2201 | page = virt_to_page(vcpu->run); |
Avi Kivity | 0956676 | 2008-01-23 18:14:23 +0200 | [diff] [blame] | 2202 | #ifdef CONFIG_X86 |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 2203 | else if (vmf->pgoff == KVM_PIO_PAGE_OFFSET) |
Zhang Xiantao | ad312c7 | 2007-12-13 23:50:52 +0800 | [diff] [blame] | 2204 | page = virt_to_page(vcpu->arch.pio_data); |
Avi Kivity | 0956676 | 2008-01-23 18:14:23 +0200 | [diff] [blame] | 2205 | #endif |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2206 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
| 2207 | else if (vmf->pgoff == KVM_COALESCED_MMIO_PAGE_OFFSET) |
| 2208 | page = virt_to_page(vcpu->kvm->coalesced_mmio_ring); |
| 2209 | #endif |
Avi Kivity | 039576c | 2007-03-20 12:46:50 +0200 | [diff] [blame] | 2210 | else |
Carsten Otte | 5b1c149 | 2012-01-04 10:25:23 +0100 | [diff] [blame] | 2211 | return kvm_arch_vcpu_fault(vcpu, vmf); |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 2212 | get_page(page); |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 2213 | vmf->page = page; |
| 2214 | return 0; |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 2215 | } |
| 2216 | |
Alexey Dobriyan | f0f37e2 | 2009-09-27 22:29:37 +0400 | [diff] [blame] | 2217 | static const struct vm_operations_struct kvm_vcpu_vm_ops = { |
npiggin@suse.de | e4a533a | 2007-12-05 18:15:52 +1100 | [diff] [blame] | 2218 | .fault = kvm_vcpu_fault, |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 2219 | }; |
| 2220 | |
| 2221 | static int kvm_vcpu_mmap(struct file *file, struct vm_area_struct *vma) |
| 2222 | { |
| 2223 | vma->vm_ops = &kvm_vcpu_vm_ops; |
| 2224 | return 0; |
| 2225 | } |
| 2226 | |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2227 | static int kvm_vcpu_release(struct inode *inode, struct file *filp) |
| 2228 | { |
| 2229 | struct kvm_vcpu *vcpu = filp->private_data; |
| 2230 | |
Al Viro | 66c0b39 | 2008-04-19 20:33:56 +0100 | [diff] [blame] | 2231 | kvm_put_kvm(vcpu->kvm); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2232 | return 0; |
| 2233 | } |
| 2234 | |
Christian Borntraeger | 3d3aab1 | 2008-12-02 11:17:32 +0100 | [diff] [blame] | 2235 | static struct file_operations kvm_vcpu_fops = { |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2236 | .release = kvm_vcpu_release, |
| 2237 | .unlocked_ioctl = kvm_vcpu_ioctl, |
Christian Borntraeger | de8e5d7 | 2015-02-03 09:35:15 +0100 | [diff] [blame] | 2238 | #ifdef CONFIG_KVM_COMPAT |
Alexander Graf | 1dda606 | 2011-06-08 02:45:37 +0200 | [diff] [blame] | 2239 | .compat_ioctl = kvm_vcpu_compat_ioctl, |
| 2240 | #endif |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 2241 | .mmap = kvm_vcpu_mmap, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 2242 | .llseek = noop_llseek, |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2243 | }; |
| 2244 | |
| 2245 | /* |
| 2246 | * Allocates an inode for the vcpu. |
| 2247 | */ |
| 2248 | static int create_vcpu_fd(struct kvm_vcpu *vcpu) |
| 2249 | { |
Yann Droneaud | 24009b0 | 2013-08-24 22:14:07 +0200 | [diff] [blame] | 2250 | 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] | 2251 | } |
| 2252 | |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 2253 | /* |
| 2254 | * Creates some virtual cpus. Good luck creating more than one. |
| 2255 | */ |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 2256 | static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, u32 id) |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 2257 | { |
| 2258 | int r; |
David Hildenbrand | e09fefd | 2015-11-05 09:03:50 +0100 | [diff] [blame] | 2259 | struct kvm_vcpu *vcpu; |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 2260 | |
Andy Honig | 338c7db | 2013-11-18 16:09:22 -0800 | [diff] [blame] | 2261 | if (id >= KVM_MAX_VCPUS) |
| 2262 | return -EINVAL; |
| 2263 | |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 2264 | vcpu = kvm_arch_vcpu_create(kvm, id); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2265 | if (IS_ERR(vcpu)) |
| 2266 | return PTR_ERR(vcpu); |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 2267 | |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 2268 | preempt_notifier_init(&vcpu->preempt_notifier, &kvm_preempt_ops); |
| 2269 | |
Avi Kivity | 26e5215 | 2007-11-20 15:30:24 +0200 | [diff] [blame] | 2270 | r = kvm_arch_vcpu_setup(vcpu); |
| 2271 | if (r) |
Jan Kiszka | d780592 | 2011-05-23 10:33:05 +0200 | [diff] [blame] | 2272 | goto vcpu_destroy; |
Avi Kivity | 26e5215 | 2007-11-20 15:30:24 +0200 | [diff] [blame] | 2273 | |
Shaohua Li | 11ec280 | 2007-07-23 14:51:37 +0800 | [diff] [blame] | 2274 | mutex_lock(&kvm->lock); |
Avi Kivity | 3e51570 | 2012-03-05 14:23:29 +0200 | [diff] [blame] | 2275 | if (!kvm_vcpu_compatible(vcpu)) { |
| 2276 | r = -EINVAL; |
| 2277 | goto unlock_vcpu_destroy; |
| 2278 | } |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 2279 | if (atomic_read(&kvm->online_vcpus) == KVM_MAX_VCPUS) { |
| 2280 | r = -EINVAL; |
Jan Kiszka | d780592 | 2011-05-23 10:33:05 +0200 | [diff] [blame] | 2281 | goto unlock_vcpu_destroy; |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2282 | } |
David Hildenbrand | e09fefd | 2015-11-05 09:03:50 +0100 | [diff] [blame] | 2283 | if (kvm_get_vcpu_by_id(kvm, id)) { |
| 2284 | r = -EEXIST; |
| 2285 | goto unlock_vcpu_destroy; |
| 2286 | } |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 2287 | |
| 2288 | BUG_ON(kvm->vcpus[atomic_read(&kvm->online_vcpus)]); |
Rusty Russell | fb3f0f5 | 2007-07-27 17:16:56 +1000 | [diff] [blame] | 2289 | |
| 2290 | /* Now it's all set up, let userspace reach it */ |
Al Viro | 66c0b39 | 2008-04-19 20:33:56 +0100 | [diff] [blame] | 2291 | kvm_get_kvm(kvm); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2292 | r = create_vcpu_fd(vcpu); |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 2293 | if (r < 0) { |
| 2294 | kvm_put_kvm(kvm); |
Jan Kiszka | d780592 | 2011-05-23 10:33:05 +0200 | [diff] [blame] | 2295 | goto unlock_vcpu_destroy; |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 2296 | } |
| 2297 | |
| 2298 | kvm->vcpus[atomic_read(&kvm->online_vcpus)] = vcpu; |
Paolo Bonzini | dd48924 | 2015-07-29 11:32:20 +0200 | [diff] [blame] | 2299 | |
| 2300 | /* |
| 2301 | * Pairs with smp_rmb() in kvm_get_vcpu. Write kvm->vcpus |
| 2302 | * before kvm->online_vcpu's incremented value. |
| 2303 | */ |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 2304 | smp_wmb(); |
| 2305 | atomic_inc(&kvm->online_vcpus); |
| 2306 | |
Gleb Natapov | 73880c8 | 2009-06-09 15:56:28 +0300 | [diff] [blame] | 2307 | mutex_unlock(&kvm->lock); |
Marcelo Tosatti | 42897d8 | 2012-11-27 23:29:02 -0200 | [diff] [blame] | 2308 | kvm_arch_vcpu_postcreate(vcpu); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2309 | return r; |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 2310 | |
Jan Kiszka | d780592 | 2011-05-23 10:33:05 +0200 | [diff] [blame] | 2311 | unlock_vcpu_destroy: |
Glauber Costa | 7d8fece | 2008-09-17 23:16:59 -0300 | [diff] [blame] | 2312 | mutex_unlock(&kvm->lock); |
Jan Kiszka | d780592 | 2011-05-23 10:33:05 +0200 | [diff] [blame] | 2313 | vcpu_destroy: |
Hollis Blanchard | d40ccc6 | 2007-11-19 14:04:43 -0600 | [diff] [blame] | 2314 | kvm_arch_vcpu_destroy(vcpu); |
Avi Kivity | c5ea766 | 2007-02-20 18:41:05 +0200 | [diff] [blame] | 2315 | return r; |
| 2316 | } |
| 2317 | |
Avi Kivity | 1961d27 | 2007-03-05 19:46:05 +0200 | [diff] [blame] | 2318 | static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset) |
| 2319 | { |
| 2320 | if (sigset) { |
| 2321 | sigdelsetmask(sigset, sigmask(SIGKILL)|sigmask(SIGSTOP)); |
| 2322 | vcpu->sigset_active = 1; |
| 2323 | vcpu->sigset = *sigset; |
| 2324 | } else |
| 2325 | vcpu->sigset_active = 0; |
| 2326 | return 0; |
| 2327 | } |
| 2328 | |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2329 | static long kvm_vcpu_ioctl(struct file *filp, |
| 2330 | unsigned int ioctl, unsigned long arg) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2331 | { |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2332 | struct kvm_vcpu *vcpu = filp->private_data; |
Al Viro | 2f366987 | 2007-02-09 16:38:35 +0000 | [diff] [blame] | 2333 | void __user *argp = (void __user *)arg; |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 2334 | int r; |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 2335 | struct kvm_fpu *fpu = NULL; |
| 2336 | struct kvm_sregs *kvm_sregs = NULL; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2337 | |
Avi Kivity | 6d4e4c4 | 2007-11-21 16:41:05 +0200 | [diff] [blame] | 2338 | if (vcpu->kvm->mm != current->mm) |
| 2339 | return -EIO; |
Avi Kivity | 2122ff5 | 2010-05-13 11:25:04 +0300 | [diff] [blame] | 2340 | |
David Matlack | 2ea75be | 2014-09-19 16:03:25 -0700 | [diff] [blame] | 2341 | if (unlikely(_IOC_TYPE(ioctl) != KVMIO)) |
| 2342 | return -EINVAL; |
| 2343 | |
Sanjay Lal | 2f4d9b5 | 2012-11-21 18:34:15 -0800 | [diff] [blame] | 2344 | #if defined(CONFIG_S390) || defined(CONFIG_PPC) || defined(CONFIG_MIPS) |
Avi Kivity | 2122ff5 | 2010-05-13 11:25:04 +0300 | [diff] [blame] | 2345 | /* |
| 2346 | * Special cases: vcpu ioctls that are asynchronous to vcpu execution, |
| 2347 | * so vcpu_load() would break it. |
| 2348 | */ |
Jens Freimann | 47b43c5 | 2014-11-11 20:57:06 +0100 | [diff] [blame] | 2349 | if (ioctl == KVM_S390_INTERRUPT || ioctl == KVM_S390_IRQ || ioctl == KVM_INTERRUPT) |
Avi Kivity | 2122ff5 | 2010-05-13 11:25:04 +0300 | [diff] [blame] | 2350 | return kvm_arch_vcpu_ioctl(filp, ioctl, arg); |
| 2351 | #endif |
| 2352 | |
| 2353 | |
Michael S. Tsirkin | 9fc7744 | 2012-09-16 11:50:30 +0300 | [diff] [blame] | 2354 | r = vcpu_load(vcpu); |
| 2355 | if (r) |
| 2356 | return r; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2357 | switch (ioctl) { |
Avi Kivity | 9a2bb7f | 2007-02-22 12:58:31 +0200 | [diff] [blame] | 2358 | case KVM_RUN: |
Avi Kivity | f0fe510 | 2007-03-07 13:11:17 +0200 | [diff] [blame] | 2359 | r = -EINVAL; |
| 2360 | if (arg) |
| 2361 | goto out; |
Christian Borntraeger | 7a72f7a | 2014-08-05 16:44:14 +0200 | [diff] [blame] | 2362 | if (unlikely(vcpu->pid != current->pids[PIDTYPE_PID].pid)) { |
| 2363 | /* The thread running this VCPU changed. */ |
| 2364 | struct pid *oldpid = vcpu->pid; |
| 2365 | struct pid *newpid = get_task_pid(current, PIDTYPE_PID); |
Xiubo Li | f95ef0c | 2015-02-26 14:58:23 +0800 | [diff] [blame] | 2366 | |
Christian Borntraeger | 7a72f7a | 2014-08-05 16:44:14 +0200 | [diff] [blame] | 2367 | rcu_assign_pointer(vcpu->pid, newpid); |
| 2368 | if (oldpid) |
| 2369 | synchronize_rcu(); |
| 2370 | put_pid(oldpid); |
| 2371 | } |
Hollis Blanchard | b6c7a5d | 2007-11-01 14:16:10 -0500 | [diff] [blame] | 2372 | r = kvm_arch_vcpu_ioctl_run(vcpu, vcpu->run); |
Gleb Natapov | 64be500 | 2010-10-24 16:49:08 +0200 | [diff] [blame] | 2373 | trace_kvm_userspace_exit(vcpu->run->exit_reason, r); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2374 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2375 | case KVM_GET_REGS: { |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 2376 | struct kvm_regs *kvm_regs; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2377 | |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 2378 | r = -ENOMEM; |
| 2379 | kvm_regs = kzalloc(sizeof(struct kvm_regs), GFP_KERNEL); |
| 2380 | if (!kvm_regs) |
| 2381 | goto out; |
| 2382 | r = kvm_arch_vcpu_ioctl_get_regs(vcpu, kvm_regs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2383 | if (r) |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 2384 | goto out_free1; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2385 | r = -EFAULT; |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 2386 | if (copy_to_user(argp, kvm_regs, sizeof(struct kvm_regs))) |
| 2387 | goto out_free1; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2388 | r = 0; |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 2389 | out_free1: |
| 2390 | kfree(kvm_regs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2391 | break; |
| 2392 | } |
| 2393 | case KVM_SET_REGS: { |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 2394 | struct kvm_regs *kvm_regs; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2395 | |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 2396 | r = -ENOMEM; |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 2397 | kvm_regs = memdup_user(argp, sizeof(*kvm_regs)); |
| 2398 | if (IS_ERR(kvm_regs)) { |
| 2399 | r = PTR_ERR(kvm_regs); |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 2400 | goto out; |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 2401 | } |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 2402 | r = kvm_arch_vcpu_ioctl_set_regs(vcpu, kvm_regs); |
Xiantao Zhang | 3e4bb3a | 2008-02-25 18:52:20 +0800 | [diff] [blame] | 2403 | kfree(kvm_regs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2404 | break; |
| 2405 | } |
| 2406 | case KVM_GET_SREGS: { |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 2407 | kvm_sregs = kzalloc(sizeof(struct kvm_sregs), GFP_KERNEL); |
| 2408 | r = -ENOMEM; |
| 2409 | if (!kvm_sregs) |
| 2410 | goto out; |
| 2411 | r = kvm_arch_vcpu_ioctl_get_sregs(vcpu, kvm_sregs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2412 | if (r) |
| 2413 | goto out; |
| 2414 | r = -EFAULT; |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 2415 | if (copy_to_user(argp, kvm_sregs, sizeof(struct kvm_sregs))) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2416 | goto out; |
| 2417 | r = 0; |
| 2418 | break; |
| 2419 | } |
| 2420 | case KVM_SET_SREGS: { |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 2421 | kvm_sregs = memdup_user(argp, sizeof(*kvm_sregs)); |
| 2422 | if (IS_ERR(kvm_sregs)) { |
| 2423 | r = PTR_ERR(kvm_sregs); |
Guo Chao | 1859541 | 2012-11-02 18:33:21 +0800 | [diff] [blame] | 2424 | kvm_sregs = NULL; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2425 | goto out; |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 2426 | } |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 2427 | r = kvm_arch_vcpu_ioctl_set_sregs(vcpu, kvm_sregs); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2428 | break; |
| 2429 | } |
Marcelo Tosatti | 62d9f0d | 2008-04-11 13:24:45 -0300 | [diff] [blame] | 2430 | case KVM_GET_MP_STATE: { |
| 2431 | struct kvm_mp_state mp_state; |
| 2432 | |
| 2433 | r = kvm_arch_vcpu_ioctl_get_mpstate(vcpu, &mp_state); |
| 2434 | if (r) |
| 2435 | goto out; |
| 2436 | r = -EFAULT; |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2437 | if (copy_to_user(argp, &mp_state, sizeof(mp_state))) |
Marcelo Tosatti | 62d9f0d | 2008-04-11 13:24:45 -0300 | [diff] [blame] | 2438 | goto out; |
| 2439 | r = 0; |
| 2440 | break; |
| 2441 | } |
| 2442 | case KVM_SET_MP_STATE: { |
| 2443 | struct kvm_mp_state mp_state; |
| 2444 | |
| 2445 | r = -EFAULT; |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2446 | if (copy_from_user(&mp_state, argp, sizeof(mp_state))) |
Marcelo Tosatti | 62d9f0d | 2008-04-11 13:24:45 -0300 | [diff] [blame] | 2447 | goto out; |
| 2448 | r = kvm_arch_vcpu_ioctl_set_mpstate(vcpu, &mp_state); |
Marcelo Tosatti | 62d9f0d | 2008-04-11 13:24:45 -0300 | [diff] [blame] | 2449 | break; |
| 2450 | } |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2451 | case KVM_TRANSLATE: { |
| 2452 | struct kvm_translation tr; |
| 2453 | |
| 2454 | r = -EFAULT; |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2455 | if (copy_from_user(&tr, argp, sizeof(tr))) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2456 | goto out; |
Zhang Xiantao | 8b00679 | 2007-11-16 13:05:55 +0800 | [diff] [blame] | 2457 | r = kvm_arch_vcpu_ioctl_translate(vcpu, &tr); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2458 | if (r) |
| 2459 | goto out; |
| 2460 | r = -EFAULT; |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2461 | if (copy_to_user(argp, &tr, sizeof(tr))) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2462 | goto out; |
| 2463 | r = 0; |
| 2464 | break; |
| 2465 | } |
Jan Kiszka | d0bfb94 | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 2466 | case KVM_SET_GUEST_DEBUG: { |
| 2467 | struct kvm_guest_debug dbg; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2468 | |
| 2469 | r = -EFAULT; |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2470 | if (copy_from_user(&dbg, argp, sizeof(dbg))) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2471 | goto out; |
Jan Kiszka | d0bfb94 | 2008-12-15 13:52:10 +0100 | [diff] [blame] | 2472 | r = kvm_arch_vcpu_ioctl_set_guest_debug(vcpu, &dbg); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2473 | break; |
| 2474 | } |
Avi Kivity | 1961d27 | 2007-03-05 19:46:05 +0200 | [diff] [blame] | 2475 | case KVM_SET_SIGNAL_MASK: { |
| 2476 | struct kvm_signal_mask __user *sigmask_arg = argp; |
| 2477 | struct kvm_signal_mask kvm_sigmask; |
| 2478 | sigset_t sigset, *p; |
| 2479 | |
| 2480 | p = NULL; |
| 2481 | if (argp) { |
| 2482 | r = -EFAULT; |
| 2483 | if (copy_from_user(&kvm_sigmask, argp, |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2484 | sizeof(kvm_sigmask))) |
Avi Kivity | 1961d27 | 2007-03-05 19:46:05 +0200 | [diff] [blame] | 2485 | goto out; |
| 2486 | r = -EINVAL; |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2487 | if (kvm_sigmask.len != sizeof(sigset)) |
Avi Kivity | 1961d27 | 2007-03-05 19:46:05 +0200 | [diff] [blame] | 2488 | goto out; |
| 2489 | r = -EFAULT; |
| 2490 | if (copy_from_user(&sigset, sigmask_arg->sigset, |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2491 | sizeof(sigset))) |
Avi Kivity | 1961d27 | 2007-03-05 19:46:05 +0200 | [diff] [blame] | 2492 | goto out; |
| 2493 | p = &sigset; |
| 2494 | } |
Andi Kleen | 376d41f | 2010-06-10 13:10:47 +0200 | [diff] [blame] | 2495 | r = kvm_vcpu_ioctl_set_sigmask(vcpu, p); |
Avi Kivity | 1961d27 | 2007-03-05 19:46:05 +0200 | [diff] [blame] | 2496 | break; |
| 2497 | } |
Avi Kivity | b883673 | 2007-04-01 16:34:31 +0300 | [diff] [blame] | 2498 | case KVM_GET_FPU: { |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 2499 | fpu = kzalloc(sizeof(struct kvm_fpu), GFP_KERNEL); |
| 2500 | r = -ENOMEM; |
| 2501 | if (!fpu) |
| 2502 | goto out; |
| 2503 | r = kvm_arch_vcpu_ioctl_get_fpu(vcpu, fpu); |
Avi Kivity | b883673 | 2007-04-01 16:34:31 +0300 | [diff] [blame] | 2504 | if (r) |
| 2505 | goto out; |
| 2506 | r = -EFAULT; |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 2507 | if (copy_to_user(argp, fpu, sizeof(struct kvm_fpu))) |
Avi Kivity | b883673 | 2007-04-01 16:34:31 +0300 | [diff] [blame] | 2508 | goto out; |
| 2509 | r = 0; |
| 2510 | break; |
| 2511 | } |
| 2512 | case KVM_SET_FPU: { |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 2513 | fpu = memdup_user(argp, sizeof(*fpu)); |
| 2514 | if (IS_ERR(fpu)) { |
| 2515 | r = PTR_ERR(fpu); |
Guo Chao | 1859541 | 2012-11-02 18:33:21 +0800 | [diff] [blame] | 2516 | fpu = NULL; |
Avi Kivity | b883673 | 2007-04-01 16:34:31 +0300 | [diff] [blame] | 2517 | goto out; |
Sasha Levin | ff5c2c0 | 2011-12-04 19:36:29 +0200 | [diff] [blame] | 2518 | } |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 2519 | r = kvm_arch_vcpu_ioctl_set_fpu(vcpu, fpu); |
Avi Kivity | b883673 | 2007-04-01 16:34:31 +0300 | [diff] [blame] | 2520 | break; |
| 2521 | } |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2522 | default: |
Carsten Otte | 313a3dc | 2007-10-11 19:16:52 +0200 | [diff] [blame] | 2523 | r = kvm_arch_vcpu_ioctl(filp, ioctl, arg); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2524 | } |
| 2525 | out: |
Avi Kivity | 2122ff5 | 2010-05-13 11:25:04 +0300 | [diff] [blame] | 2526 | vcpu_put(vcpu); |
Dave Hansen | fa3795a | 2008-08-11 10:01:46 -0700 | [diff] [blame] | 2527 | kfree(fpu); |
| 2528 | kfree(kvm_sregs); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2529 | return r; |
| 2530 | } |
| 2531 | |
Christian Borntraeger | de8e5d7 | 2015-02-03 09:35:15 +0100 | [diff] [blame] | 2532 | #ifdef CONFIG_KVM_COMPAT |
Alexander Graf | 1dda606 | 2011-06-08 02:45:37 +0200 | [diff] [blame] | 2533 | static long kvm_vcpu_compat_ioctl(struct file *filp, |
| 2534 | unsigned int ioctl, unsigned long arg) |
| 2535 | { |
| 2536 | struct kvm_vcpu *vcpu = filp->private_data; |
| 2537 | void __user *argp = compat_ptr(arg); |
| 2538 | int r; |
| 2539 | |
| 2540 | if (vcpu->kvm->mm != current->mm) |
| 2541 | return -EIO; |
| 2542 | |
| 2543 | switch (ioctl) { |
| 2544 | case KVM_SET_SIGNAL_MASK: { |
| 2545 | struct kvm_signal_mask __user *sigmask_arg = argp; |
| 2546 | struct kvm_signal_mask kvm_sigmask; |
| 2547 | compat_sigset_t csigset; |
| 2548 | sigset_t sigset; |
| 2549 | |
| 2550 | if (argp) { |
| 2551 | r = -EFAULT; |
| 2552 | if (copy_from_user(&kvm_sigmask, argp, |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2553 | sizeof(kvm_sigmask))) |
Alexander Graf | 1dda606 | 2011-06-08 02:45:37 +0200 | [diff] [blame] | 2554 | goto out; |
| 2555 | r = -EINVAL; |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2556 | if (kvm_sigmask.len != sizeof(csigset)) |
Alexander Graf | 1dda606 | 2011-06-08 02:45:37 +0200 | [diff] [blame] | 2557 | goto out; |
| 2558 | r = -EFAULT; |
| 2559 | if (copy_from_user(&csigset, sigmask_arg->sigset, |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2560 | sizeof(csigset))) |
Alexander Graf | 1dda606 | 2011-06-08 02:45:37 +0200 | [diff] [blame] | 2561 | goto out; |
Alan Cox | 760a9a3 | 2012-08-22 14:34:11 +0100 | [diff] [blame] | 2562 | sigset_from_compat(&sigset, &csigset); |
| 2563 | r = kvm_vcpu_ioctl_set_sigmask(vcpu, &sigset); |
| 2564 | } else |
| 2565 | r = kvm_vcpu_ioctl_set_sigmask(vcpu, NULL); |
Alexander Graf | 1dda606 | 2011-06-08 02:45:37 +0200 | [diff] [blame] | 2566 | break; |
| 2567 | } |
| 2568 | default: |
| 2569 | r = kvm_vcpu_ioctl(filp, ioctl, arg); |
| 2570 | } |
| 2571 | |
| 2572 | out: |
| 2573 | return r; |
| 2574 | } |
| 2575 | #endif |
| 2576 | |
Scott Wood | 852b6d5 | 2013-04-12 14:08:42 +0000 | [diff] [blame] | 2577 | static int kvm_device_ioctl_attr(struct kvm_device *dev, |
| 2578 | int (*accessor)(struct kvm_device *dev, |
| 2579 | struct kvm_device_attr *attr), |
| 2580 | unsigned long arg) |
| 2581 | { |
| 2582 | struct kvm_device_attr attr; |
| 2583 | |
| 2584 | if (!accessor) |
| 2585 | return -EPERM; |
| 2586 | |
| 2587 | if (copy_from_user(&attr, (void __user *)arg, sizeof(attr))) |
| 2588 | return -EFAULT; |
| 2589 | |
| 2590 | return accessor(dev, &attr); |
| 2591 | } |
| 2592 | |
| 2593 | static long kvm_device_ioctl(struct file *filp, unsigned int ioctl, |
| 2594 | unsigned long arg) |
| 2595 | { |
| 2596 | struct kvm_device *dev = filp->private_data; |
| 2597 | |
| 2598 | switch (ioctl) { |
| 2599 | case KVM_SET_DEVICE_ATTR: |
| 2600 | return kvm_device_ioctl_attr(dev, dev->ops->set_attr, arg); |
| 2601 | case KVM_GET_DEVICE_ATTR: |
| 2602 | return kvm_device_ioctl_attr(dev, dev->ops->get_attr, arg); |
| 2603 | case KVM_HAS_DEVICE_ATTR: |
| 2604 | return kvm_device_ioctl_attr(dev, dev->ops->has_attr, arg); |
| 2605 | default: |
| 2606 | if (dev->ops->ioctl) |
| 2607 | return dev->ops->ioctl(dev, ioctl, arg); |
| 2608 | |
| 2609 | return -ENOTTY; |
| 2610 | } |
| 2611 | } |
| 2612 | |
Scott Wood | 852b6d5 | 2013-04-12 14:08:42 +0000 | [diff] [blame] | 2613 | static int kvm_device_release(struct inode *inode, struct file *filp) |
| 2614 | { |
| 2615 | struct kvm_device *dev = filp->private_data; |
| 2616 | struct kvm *kvm = dev->kvm; |
| 2617 | |
Scott Wood | 852b6d5 | 2013-04-12 14:08:42 +0000 | [diff] [blame] | 2618 | kvm_put_kvm(kvm); |
| 2619 | return 0; |
| 2620 | } |
| 2621 | |
| 2622 | static const struct file_operations kvm_device_fops = { |
| 2623 | .unlocked_ioctl = kvm_device_ioctl, |
Christian Borntraeger | de8e5d7 | 2015-02-03 09:35:15 +0100 | [diff] [blame] | 2624 | #ifdef CONFIG_KVM_COMPAT |
Scott Wood | db6ae61 | 2013-04-30 20:00:45 -0500 | [diff] [blame] | 2625 | .compat_ioctl = kvm_device_ioctl, |
| 2626 | #endif |
Scott Wood | 852b6d5 | 2013-04-12 14:08:42 +0000 | [diff] [blame] | 2627 | .release = kvm_device_release, |
| 2628 | }; |
| 2629 | |
| 2630 | struct kvm_device *kvm_device_from_filp(struct file *filp) |
| 2631 | { |
| 2632 | if (filp->f_op != &kvm_device_fops) |
| 2633 | return NULL; |
| 2634 | |
| 2635 | return filp->private_data; |
| 2636 | } |
| 2637 | |
Will Deacon | d60eacb | 2014-09-02 10:27:33 +0100 | [diff] [blame] | 2638 | static struct kvm_device_ops *kvm_device_ops_table[KVM_DEV_TYPE_MAX] = { |
| 2639 | #ifdef CONFIG_KVM_MPIC |
| 2640 | [KVM_DEV_TYPE_FSL_MPIC_20] = &kvm_mpic_ops, |
| 2641 | [KVM_DEV_TYPE_FSL_MPIC_42] = &kvm_mpic_ops, |
| 2642 | #endif |
| 2643 | |
| 2644 | #ifdef CONFIG_KVM_XICS |
| 2645 | [KVM_DEV_TYPE_XICS] = &kvm_xics_ops, |
| 2646 | #endif |
Will Deacon | d60eacb | 2014-09-02 10:27:33 +0100 | [diff] [blame] | 2647 | }; |
| 2648 | |
| 2649 | int kvm_register_device_ops(struct kvm_device_ops *ops, u32 type) |
| 2650 | { |
| 2651 | if (type >= ARRAY_SIZE(kvm_device_ops_table)) |
| 2652 | return -ENOSPC; |
| 2653 | |
| 2654 | if (kvm_device_ops_table[type] != NULL) |
| 2655 | return -EEXIST; |
| 2656 | |
| 2657 | kvm_device_ops_table[type] = ops; |
| 2658 | return 0; |
| 2659 | } |
| 2660 | |
Wanpeng Li | 571ee1b | 2014-10-09 18:30:08 +0800 | [diff] [blame] | 2661 | void kvm_unregister_device_ops(u32 type) |
| 2662 | { |
| 2663 | if (kvm_device_ops_table[type] != NULL) |
| 2664 | kvm_device_ops_table[type] = NULL; |
| 2665 | } |
| 2666 | |
Scott Wood | 852b6d5 | 2013-04-12 14:08:42 +0000 | [diff] [blame] | 2667 | static int kvm_ioctl_create_device(struct kvm *kvm, |
| 2668 | struct kvm_create_device *cd) |
| 2669 | { |
| 2670 | struct kvm_device_ops *ops = NULL; |
| 2671 | struct kvm_device *dev; |
| 2672 | bool test = cd->flags & KVM_CREATE_DEVICE_TEST; |
| 2673 | int ret; |
| 2674 | |
Will Deacon | d60eacb | 2014-09-02 10:27:33 +0100 | [diff] [blame] | 2675 | if (cd->type >= ARRAY_SIZE(kvm_device_ops_table)) |
Scott Wood | 852b6d5 | 2013-04-12 14:08:42 +0000 | [diff] [blame] | 2676 | return -ENODEV; |
Will Deacon | d60eacb | 2014-09-02 10:27:33 +0100 | [diff] [blame] | 2677 | |
| 2678 | ops = kvm_device_ops_table[cd->type]; |
| 2679 | if (ops == NULL) |
| 2680 | return -ENODEV; |
Scott Wood | 852b6d5 | 2013-04-12 14:08:42 +0000 | [diff] [blame] | 2681 | |
| 2682 | if (test) |
| 2683 | return 0; |
| 2684 | |
| 2685 | dev = kzalloc(sizeof(*dev), GFP_KERNEL); |
| 2686 | if (!dev) |
| 2687 | return -ENOMEM; |
| 2688 | |
| 2689 | dev->ops = ops; |
| 2690 | dev->kvm = kvm; |
Scott Wood | 852b6d5 | 2013-04-12 14:08:42 +0000 | [diff] [blame] | 2691 | |
| 2692 | ret = ops->create(dev, cd->type); |
| 2693 | if (ret < 0) { |
| 2694 | kfree(dev); |
| 2695 | return ret; |
| 2696 | } |
| 2697 | |
Yann Droneaud | 24009b0 | 2013-08-24 22:14:07 +0200 | [diff] [blame] | 2698 | 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] | 2699 | if (ret < 0) { |
| 2700 | ops->destroy(dev); |
| 2701 | return ret; |
| 2702 | } |
| 2703 | |
Scott Wood | 07f0a7b | 2013-04-25 14:11:23 +0000 | [diff] [blame] | 2704 | list_add(&dev->vm_node, &kvm->devices); |
Scott Wood | 852b6d5 | 2013-04-12 14:08:42 +0000 | [diff] [blame] | 2705 | kvm_get_kvm(kvm); |
| 2706 | cd->fd = ret; |
| 2707 | return 0; |
| 2708 | } |
| 2709 | |
Alexander Graf | 92b591a | 2014-07-14 18:33:08 +0200 | [diff] [blame] | 2710 | static long kvm_vm_ioctl_check_extension_generic(struct kvm *kvm, long arg) |
| 2711 | { |
| 2712 | switch (arg) { |
| 2713 | case KVM_CAP_USER_MEMORY: |
| 2714 | case KVM_CAP_DESTROY_MEMORY_REGION_WORKS: |
| 2715 | case KVM_CAP_JOIN_MEMORY_REGIONS_WORKS: |
Alexander Graf | 92b591a | 2014-07-14 18:33:08 +0200 | [diff] [blame] | 2716 | case KVM_CAP_INTERNAL_ERROR_DATA: |
| 2717 | #ifdef CONFIG_HAVE_KVM_MSI |
| 2718 | case KVM_CAP_SIGNAL_MSI: |
| 2719 | #endif |
Paul Mackerras | 297e210 | 2014-06-30 20:51:13 +1000 | [diff] [blame] | 2720 | #ifdef CONFIG_HAVE_KVM_IRQFD |
Paolo Bonzini | dc9be0f | 2015-03-05 11:54:46 +0100 | [diff] [blame] | 2721 | case KVM_CAP_IRQFD: |
Alexander Graf | 92b591a | 2014-07-14 18:33:08 +0200 | [diff] [blame] | 2722 | case KVM_CAP_IRQFD_RESAMPLE: |
| 2723 | #endif |
Jason Wang | e9ea506 | 2015-09-15 14:41:59 +0800 | [diff] [blame] | 2724 | case KVM_CAP_IOEVENTFD_ANY_LENGTH: |
Alexander Graf | 92b591a | 2014-07-14 18:33:08 +0200 | [diff] [blame] | 2725 | case KVM_CAP_CHECK_EXTENSION_VM: |
| 2726 | return 1; |
| 2727 | #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING |
| 2728 | case KVM_CAP_IRQ_ROUTING: |
| 2729 | return KVM_MAX_IRQ_ROUTES; |
| 2730 | #endif |
Paolo Bonzini | f481b06 | 2015-05-17 17:30:37 +0200 | [diff] [blame] | 2731 | #if KVM_ADDRESS_SPACE_NUM > 1 |
| 2732 | case KVM_CAP_MULTI_ADDRESS_SPACE: |
| 2733 | return KVM_ADDRESS_SPACE_NUM; |
| 2734 | #endif |
Alexander Graf | 92b591a | 2014-07-14 18:33:08 +0200 | [diff] [blame] | 2735 | default: |
| 2736 | break; |
| 2737 | } |
| 2738 | return kvm_vm_ioctl_check_extension(kvm, arg); |
| 2739 | } |
| 2740 | |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2741 | static long kvm_vm_ioctl(struct file *filp, |
| 2742 | unsigned int ioctl, unsigned long arg) |
| 2743 | { |
| 2744 | struct kvm *kvm = filp->private_data; |
| 2745 | void __user *argp = (void __user *)arg; |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2746 | int r; |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2747 | |
Avi Kivity | 6d4e4c4 | 2007-11-21 16:41:05 +0200 | [diff] [blame] | 2748 | if (kvm->mm != current->mm) |
| 2749 | return -EIO; |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2750 | switch (ioctl) { |
| 2751 | case KVM_CREATE_VCPU: |
| 2752 | r = kvm_vm_ioctl_create_vcpu(kvm, arg); |
Avi Kivity | bccf215 | 2007-02-21 18:04:26 +0200 | [diff] [blame] | 2753 | break; |
Izik Eidus | 6fc138d | 2007-10-09 19:20:39 +0200 | [diff] [blame] | 2754 | case KVM_SET_USER_MEMORY_REGION: { |
| 2755 | struct kvm_userspace_memory_region kvm_userspace_mem; |
| 2756 | |
| 2757 | r = -EFAULT; |
| 2758 | if (copy_from_user(&kvm_userspace_mem, argp, |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2759 | sizeof(kvm_userspace_mem))) |
Izik Eidus | 6fc138d | 2007-10-09 19:20:39 +0200 | [diff] [blame] | 2760 | goto out; |
| 2761 | |
Takuya Yoshikawa | 47ae31e | 2013-02-27 19:43:00 +0900 | [diff] [blame] | 2762 | r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2763 | break; |
| 2764 | } |
| 2765 | case KVM_GET_DIRTY_LOG: { |
| 2766 | struct kvm_dirty_log log; |
| 2767 | |
| 2768 | r = -EFAULT; |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2769 | if (copy_from_user(&log, argp, sizeof(log))) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2770 | goto out; |
Avi Kivity | 2c6f5df | 2007-02-20 18:27:58 +0200 | [diff] [blame] | 2771 | r = kvm_vm_ioctl_get_dirty_log(kvm, &log); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 2772 | break; |
| 2773 | } |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2774 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
| 2775 | case KVM_REGISTER_COALESCED_MMIO: { |
| 2776 | struct kvm_coalesced_mmio_zone zone; |
Xiubo Li | f95ef0c | 2015-02-26 14:58:23 +0800 | [diff] [blame] | 2777 | |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2778 | r = -EFAULT; |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2779 | if (copy_from_user(&zone, argp, sizeof(zone))) |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2780 | goto out; |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2781 | r = kvm_vm_ioctl_register_coalesced_mmio(kvm, &zone); |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2782 | break; |
| 2783 | } |
| 2784 | case KVM_UNREGISTER_COALESCED_MMIO: { |
| 2785 | struct kvm_coalesced_mmio_zone zone; |
Xiubo Li | f95ef0c | 2015-02-26 14:58:23 +0800 | [diff] [blame] | 2786 | |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2787 | r = -EFAULT; |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2788 | if (copy_from_user(&zone, argp, sizeof(zone))) |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2789 | goto out; |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2790 | r = kvm_vm_ioctl_unregister_coalesced_mmio(kvm, &zone); |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 2791 | break; |
| 2792 | } |
| 2793 | #endif |
Gregory Haskins | 721eecb | 2009-05-20 10:30:49 -0400 | [diff] [blame] | 2794 | case KVM_IRQFD: { |
| 2795 | struct kvm_irqfd data; |
| 2796 | |
| 2797 | r = -EFAULT; |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2798 | if (copy_from_user(&data, argp, sizeof(data))) |
Gregory Haskins | 721eecb | 2009-05-20 10:30:49 -0400 | [diff] [blame] | 2799 | goto out; |
Alex Williamson | d4db293 | 2012-06-29 09:56:08 -0600 | [diff] [blame] | 2800 | r = kvm_irqfd(kvm, &data); |
Gregory Haskins | 721eecb | 2009-05-20 10:30:49 -0400 | [diff] [blame] | 2801 | break; |
| 2802 | } |
Gregory Haskins | d34e6b1 | 2009-07-07 17:08:49 -0400 | [diff] [blame] | 2803 | case KVM_IOEVENTFD: { |
| 2804 | struct kvm_ioeventfd data; |
| 2805 | |
| 2806 | r = -EFAULT; |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2807 | if (copy_from_user(&data, argp, sizeof(data))) |
Gregory Haskins | d34e6b1 | 2009-07-07 17:08:49 -0400 | [diff] [blame] | 2808 | goto out; |
| 2809 | r = kvm_ioeventfd(kvm, &data); |
| 2810 | break; |
| 2811 | } |
Jan Kiszka | 07975ad | 2012-03-29 21:14:12 +0200 | [diff] [blame] | 2812 | #ifdef CONFIG_HAVE_KVM_MSI |
| 2813 | case KVM_SIGNAL_MSI: { |
| 2814 | struct kvm_msi msi; |
| 2815 | |
| 2816 | r = -EFAULT; |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2817 | if (copy_from_user(&msi, argp, sizeof(msi))) |
Jan Kiszka | 07975ad | 2012-03-29 21:14:12 +0200 | [diff] [blame] | 2818 | goto out; |
| 2819 | r = kvm_send_userspace_msi(kvm, &msi); |
| 2820 | break; |
| 2821 | } |
| 2822 | #endif |
Christoffer Dall | 23d43cf | 2012-07-24 08:51:20 -0400 | [diff] [blame] | 2823 | #ifdef __KVM_HAVE_IRQ_LINE |
| 2824 | case KVM_IRQ_LINE_STATUS: |
| 2825 | case KVM_IRQ_LINE: { |
| 2826 | struct kvm_irq_level irq_event; |
| 2827 | |
| 2828 | r = -EFAULT; |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2829 | if (copy_from_user(&irq_event, argp, sizeof(irq_event))) |
Christoffer Dall | 23d43cf | 2012-07-24 08:51:20 -0400 | [diff] [blame] | 2830 | goto out; |
| 2831 | |
Yang Zhang | aa2fbe6 | 2013-04-11 19:21:40 +0800 | [diff] [blame] | 2832 | r = kvm_vm_ioctl_irq_line(kvm, &irq_event, |
| 2833 | ioctl == KVM_IRQ_LINE_STATUS); |
Christoffer Dall | 23d43cf | 2012-07-24 08:51:20 -0400 | [diff] [blame] | 2834 | if (r) |
| 2835 | goto out; |
| 2836 | |
| 2837 | r = -EFAULT; |
| 2838 | if (ioctl == KVM_IRQ_LINE_STATUS) { |
Xiubo Li | 893bdbf | 2015-02-26 14:58:19 +0800 | [diff] [blame] | 2839 | if (copy_to_user(argp, &irq_event, sizeof(irq_event))) |
Christoffer Dall | 23d43cf | 2012-07-24 08:51:20 -0400 | [diff] [blame] | 2840 | goto out; |
| 2841 | } |
| 2842 | |
| 2843 | r = 0; |
| 2844 | break; |
| 2845 | } |
| 2846 | #endif |
Alexander Graf | aa8d594 | 2013-04-15 21:12:53 +0200 | [diff] [blame] | 2847 | #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING |
| 2848 | case KVM_SET_GSI_ROUTING: { |
| 2849 | struct kvm_irq_routing routing; |
| 2850 | struct kvm_irq_routing __user *urouting; |
| 2851 | struct kvm_irq_routing_entry *entries; |
| 2852 | |
| 2853 | r = -EFAULT; |
| 2854 | if (copy_from_user(&routing, argp, sizeof(routing))) |
| 2855 | goto out; |
| 2856 | r = -EINVAL; |
| 2857 | if (routing.nr >= KVM_MAX_IRQ_ROUTES) |
| 2858 | goto out; |
| 2859 | if (routing.flags) |
| 2860 | goto out; |
| 2861 | r = -ENOMEM; |
| 2862 | entries = vmalloc(routing.nr * sizeof(*entries)); |
| 2863 | if (!entries) |
| 2864 | goto out; |
| 2865 | r = -EFAULT; |
| 2866 | urouting = argp; |
| 2867 | if (copy_from_user(entries, urouting->entries, |
| 2868 | routing.nr * sizeof(*entries))) |
| 2869 | goto out_free_irq_routing; |
| 2870 | r = kvm_set_irq_routing(kvm, entries, routing.nr, |
| 2871 | routing.flags); |
Xiubo Li | a642a17 | 2015-02-26 14:58:20 +0800 | [diff] [blame] | 2872 | out_free_irq_routing: |
Alexander Graf | aa8d594 | 2013-04-15 21:12:53 +0200 | [diff] [blame] | 2873 | vfree(entries); |
| 2874 | break; |
| 2875 | } |
| 2876 | #endif /* CONFIG_HAVE_KVM_IRQ_ROUTING */ |
Scott Wood | 852b6d5 | 2013-04-12 14:08:42 +0000 | [diff] [blame] | 2877 | case KVM_CREATE_DEVICE: { |
| 2878 | struct kvm_create_device cd; |
| 2879 | |
| 2880 | r = -EFAULT; |
| 2881 | if (copy_from_user(&cd, argp, sizeof(cd))) |
| 2882 | goto out; |
| 2883 | |
| 2884 | r = kvm_ioctl_create_device(kvm, &cd); |
| 2885 | if (r) |
| 2886 | goto out; |
| 2887 | |
| 2888 | r = -EFAULT; |
| 2889 | if (copy_to_user(argp, &cd, sizeof(cd))) |
| 2890 | goto out; |
| 2891 | |
| 2892 | r = 0; |
| 2893 | break; |
| 2894 | } |
Alexander Graf | 92b591a | 2014-07-14 18:33:08 +0200 | [diff] [blame] | 2895 | case KVM_CHECK_EXTENSION: |
| 2896 | r = kvm_vm_ioctl_check_extension_generic(kvm, arg); |
| 2897 | break; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2898 | default: |
Carsten Otte | 1fe779f | 2007-10-29 16:08:35 +0100 | [diff] [blame] | 2899 | r = kvm_arch_vm_ioctl(filp, ioctl, arg); |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2900 | } |
| 2901 | out: |
| 2902 | return r; |
| 2903 | } |
| 2904 | |
Christian Borntraeger | de8e5d7 | 2015-02-03 09:35:15 +0100 | [diff] [blame] | 2905 | #ifdef CONFIG_KVM_COMPAT |
Arnd Bergmann | 6ff5894 | 2009-10-22 14:19:27 +0200 | [diff] [blame] | 2906 | struct compat_kvm_dirty_log { |
| 2907 | __u32 slot; |
| 2908 | __u32 padding1; |
| 2909 | union { |
| 2910 | compat_uptr_t dirty_bitmap; /* one bit per page */ |
| 2911 | __u64 padding2; |
| 2912 | }; |
| 2913 | }; |
| 2914 | |
| 2915 | static long kvm_vm_compat_ioctl(struct file *filp, |
| 2916 | unsigned int ioctl, unsigned long arg) |
| 2917 | { |
| 2918 | struct kvm *kvm = filp->private_data; |
| 2919 | int r; |
| 2920 | |
| 2921 | if (kvm->mm != current->mm) |
| 2922 | return -EIO; |
| 2923 | switch (ioctl) { |
| 2924 | case KVM_GET_DIRTY_LOG: { |
| 2925 | struct compat_kvm_dirty_log compat_log; |
| 2926 | struct kvm_dirty_log log; |
| 2927 | |
| 2928 | r = -EFAULT; |
| 2929 | if (copy_from_user(&compat_log, (void __user *)arg, |
| 2930 | sizeof(compat_log))) |
| 2931 | goto out; |
| 2932 | log.slot = compat_log.slot; |
| 2933 | log.padding1 = compat_log.padding1; |
| 2934 | log.padding2 = compat_log.padding2; |
| 2935 | log.dirty_bitmap = compat_ptr(compat_log.dirty_bitmap); |
| 2936 | |
| 2937 | r = kvm_vm_ioctl_get_dirty_log(kvm, &log); |
Arnd Bergmann | 6ff5894 | 2009-10-22 14:19:27 +0200 | [diff] [blame] | 2938 | break; |
| 2939 | } |
| 2940 | default: |
| 2941 | r = kvm_vm_ioctl(filp, ioctl, arg); |
| 2942 | } |
| 2943 | |
| 2944 | out: |
| 2945 | return r; |
| 2946 | } |
| 2947 | #endif |
| 2948 | |
Christian Borntraeger | 3d3aab1 | 2008-12-02 11:17:32 +0100 | [diff] [blame] | 2949 | static struct file_operations kvm_vm_fops = { |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2950 | .release = kvm_vm_release, |
| 2951 | .unlocked_ioctl = kvm_vm_ioctl, |
Christian Borntraeger | de8e5d7 | 2015-02-03 09:35:15 +0100 | [diff] [blame] | 2952 | #ifdef CONFIG_KVM_COMPAT |
Arnd Bergmann | 6ff5894 | 2009-10-22 14:19:27 +0200 | [diff] [blame] | 2953 | .compat_ioctl = kvm_vm_compat_ioctl, |
| 2954 | #endif |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 2955 | .llseek = noop_llseek, |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2956 | }; |
| 2957 | |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 2958 | static int kvm_dev_ioctl_create_vm(unsigned long type) |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2959 | { |
Heiko Carstens | aac8763 | 2010-10-27 17:22:10 +0200 | [diff] [blame] | 2960 | int r; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2961 | struct kvm *kvm; |
| 2962 | |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 2963 | kvm = kvm_create_vm(type); |
Avi Kivity | d6d2816 | 2007-06-28 08:38:16 -0400 | [diff] [blame] | 2964 | if (IS_ERR(kvm)) |
| 2965 | return PTR_ERR(kvm); |
Takuya Yoshikawa | 6ce5a09 | 2010-03-15 22:13:30 +0900 | [diff] [blame] | 2966 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
| 2967 | r = kvm_coalesced_mmio_init(kvm); |
| 2968 | if (r < 0) { |
| 2969 | kvm_put_kvm(kvm); |
| 2970 | return r; |
| 2971 | } |
| 2972 | #endif |
Yann Droneaud | 24009b0 | 2013-08-24 22:14:07 +0200 | [diff] [blame] | 2973 | 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] | 2974 | if (r < 0) |
Al Viro | 66c0b39 | 2008-04-19 20:33:56 +0100 | [diff] [blame] | 2975 | kvm_put_kvm(kvm); |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2976 | |
Heiko Carstens | aac8763 | 2010-10-27 17:22:10 +0200 | [diff] [blame] | 2977 | return r; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2978 | } |
| 2979 | |
| 2980 | static long kvm_dev_ioctl(struct file *filp, |
| 2981 | unsigned int ioctl, unsigned long arg) |
| 2982 | { |
Avi Kivity | 07c45a3 | 2007-03-07 13:05:38 +0200 | [diff] [blame] | 2983 | long r = -EINVAL; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2984 | |
| 2985 | switch (ioctl) { |
| 2986 | case KVM_GET_API_VERSION: |
Avi Kivity | f0fe510 | 2007-03-07 13:11:17 +0200 | [diff] [blame] | 2987 | if (arg) |
| 2988 | goto out; |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2989 | r = KVM_API_VERSION; |
| 2990 | break; |
| 2991 | case KVM_CREATE_VM: |
Carsten Otte | e08b963 | 2012-01-04 10:25:20 +0100 | [diff] [blame] | 2992 | r = kvm_dev_ioctl_create_vm(arg); |
Avi Kivity | f17abe9 | 2007-02-21 19:28:04 +0200 | [diff] [blame] | 2993 | break; |
Zhang Xiantao | 018d00d | 2007-11-15 23:07:47 +0800 | [diff] [blame] | 2994 | case KVM_CHECK_EXTENSION: |
Alexander Graf | 784aa3d | 2014-07-14 18:27:35 +0200 | [diff] [blame] | 2995 | r = kvm_vm_ioctl_check_extension_generic(NULL, arg); |
Avi Kivity | 5d308f4 | 2007-03-01 17:56:20 +0200 | [diff] [blame] | 2996 | break; |
Avi Kivity | 07c45a3 | 2007-03-07 13:05:38 +0200 | [diff] [blame] | 2997 | case KVM_GET_VCPU_MMAP_SIZE: |
Avi Kivity | 07c45a3 | 2007-03-07 13:05:38 +0200 | [diff] [blame] | 2998 | if (arg) |
| 2999 | goto out; |
Avi Kivity | adb1ff4 | 2008-01-24 15:13:08 +0200 | [diff] [blame] | 3000 | r = PAGE_SIZE; /* struct kvm_run */ |
| 3001 | #ifdef CONFIG_X86 |
| 3002 | r += PAGE_SIZE; /* pio data page */ |
| 3003 | #endif |
Laurent Vivier | 5f94c17 | 2008-05-30 16:05:54 +0200 | [diff] [blame] | 3004 | #ifdef KVM_COALESCED_MMIO_PAGE_OFFSET |
| 3005 | r += PAGE_SIZE; /* coalesced mmio ring page */ |
| 3006 | #endif |
Avi Kivity | 07c45a3 | 2007-03-07 13:05:38 +0200 | [diff] [blame] | 3007 | break; |
Feng(Eric) Liu | d4c9ff2 | 2008-04-10 08:47:53 -0400 | [diff] [blame] | 3008 | case KVM_TRACE_ENABLE: |
| 3009 | case KVM_TRACE_PAUSE: |
| 3010 | case KVM_TRACE_DISABLE: |
Marcelo Tosatti | 2023a29 | 2009-06-18 11:47:28 -0300 | [diff] [blame] | 3011 | r = -EOPNOTSUPP; |
Feng(Eric) Liu | d4c9ff2 | 2008-04-10 08:47:53 -0400 | [diff] [blame] | 3012 | break; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3013 | default: |
Carsten Otte | 043405e | 2007-10-10 17:16:19 +0200 | [diff] [blame] | 3014 | return kvm_arch_dev_ioctl(filp, ioctl, arg); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3015 | } |
| 3016 | out: |
| 3017 | return r; |
| 3018 | } |
| 3019 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3020 | static struct file_operations kvm_chardev_ops = { |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3021 | .unlocked_ioctl = kvm_dev_ioctl, |
| 3022 | .compat_ioctl = kvm_dev_ioctl, |
Arnd Bergmann | 6038f37 | 2010-08-15 18:52:59 +0200 | [diff] [blame] | 3023 | .llseek = noop_llseek, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3024 | }; |
| 3025 | |
| 3026 | static struct miscdevice kvm_dev = { |
Avi Kivity | bbe4432 | 2007-03-04 13:27:36 +0200 | [diff] [blame] | 3027 | KVM_MINOR, |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3028 | "kvm", |
| 3029 | &kvm_chardev_ops, |
| 3030 | }; |
| 3031 | |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 3032 | static void hardware_enable_nolock(void *junk) |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 3033 | { |
| 3034 | int cpu = raw_smp_processor_id(); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 3035 | int r; |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 3036 | |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 3037 | if (cpumask_test_cpu(cpu, cpus_hardware_enabled)) |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 3038 | return; |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 3039 | |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 3040 | cpumask_set_cpu(cpu, cpus_hardware_enabled); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 3041 | |
Radim Krčmář | 13a34e0 | 2014-08-28 15:13:03 +0200 | [diff] [blame] | 3042 | r = kvm_arch_hardware_enable(); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 3043 | |
| 3044 | if (r) { |
| 3045 | cpumask_clear_cpu(cpu, cpus_hardware_enabled); |
| 3046 | atomic_inc(&hardware_enable_failed); |
Xiubo Li | 1170adc | 2015-02-26 14:58:26 +0800 | [diff] [blame] | 3047 | pr_info("kvm: enabling virtualization on CPU%d failed\n", cpu); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 3048 | } |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 3049 | } |
| 3050 | |
Paolo Bonzini | 4fa92fb | 2013-09-10 12:57:17 +0200 | [diff] [blame] | 3051 | static void hardware_enable(void) |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 3052 | { |
Paolo Bonzini | 4a937f9 | 2013-09-10 12:58:35 +0200 | [diff] [blame] | 3053 | raw_spin_lock(&kvm_count_lock); |
Paolo Bonzini | 4fa92fb | 2013-09-10 12:57:17 +0200 | [diff] [blame] | 3054 | if (kvm_usage_count) |
| 3055 | hardware_enable_nolock(NULL); |
Paolo Bonzini | 4a937f9 | 2013-09-10 12:58:35 +0200 | [diff] [blame] | 3056 | raw_spin_unlock(&kvm_count_lock); |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 3057 | } |
| 3058 | |
| 3059 | static void hardware_disable_nolock(void *junk) |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 3060 | { |
| 3061 | int cpu = raw_smp_processor_id(); |
| 3062 | |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 3063 | if (!cpumask_test_cpu(cpu, cpus_hardware_enabled)) |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 3064 | return; |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 3065 | cpumask_clear_cpu(cpu, cpus_hardware_enabled); |
Radim Krčmář | 13a34e0 | 2014-08-28 15:13:03 +0200 | [diff] [blame] | 3066 | kvm_arch_hardware_disable(); |
Avi Kivity | 1b6c016 | 2007-05-24 13:03:52 +0300 | [diff] [blame] | 3067 | } |
| 3068 | |
Paolo Bonzini | 4fa92fb | 2013-09-10 12:57:17 +0200 | [diff] [blame] | 3069 | static void hardware_disable(void) |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 3070 | { |
Paolo Bonzini | 4a937f9 | 2013-09-10 12:58:35 +0200 | [diff] [blame] | 3071 | raw_spin_lock(&kvm_count_lock); |
Paolo Bonzini | 4fa92fb | 2013-09-10 12:57:17 +0200 | [diff] [blame] | 3072 | if (kvm_usage_count) |
| 3073 | hardware_disable_nolock(NULL); |
Paolo Bonzini | 4a937f9 | 2013-09-10 12:58:35 +0200 | [diff] [blame] | 3074 | raw_spin_unlock(&kvm_count_lock); |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 3075 | } |
| 3076 | |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 3077 | static void hardware_disable_all_nolock(void) |
| 3078 | { |
| 3079 | BUG_ON(!kvm_usage_count); |
| 3080 | |
| 3081 | kvm_usage_count--; |
| 3082 | if (!kvm_usage_count) |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 3083 | on_each_cpu(hardware_disable_nolock, NULL, 1); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 3084 | } |
| 3085 | |
| 3086 | static void hardware_disable_all(void) |
| 3087 | { |
Paolo Bonzini | 4a937f9 | 2013-09-10 12:58:35 +0200 | [diff] [blame] | 3088 | raw_spin_lock(&kvm_count_lock); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 3089 | hardware_disable_all_nolock(); |
Paolo Bonzini | 4a937f9 | 2013-09-10 12:58:35 +0200 | [diff] [blame] | 3090 | raw_spin_unlock(&kvm_count_lock); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 3091 | } |
| 3092 | |
| 3093 | static int hardware_enable_all(void) |
| 3094 | { |
| 3095 | int r = 0; |
| 3096 | |
Paolo Bonzini | 4a937f9 | 2013-09-10 12:58:35 +0200 | [diff] [blame] | 3097 | raw_spin_lock(&kvm_count_lock); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 3098 | |
| 3099 | kvm_usage_count++; |
| 3100 | if (kvm_usage_count == 1) { |
| 3101 | atomic_set(&hardware_enable_failed, 0); |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 3102 | on_each_cpu(hardware_enable_nolock, NULL, 1); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 3103 | |
| 3104 | if (atomic_read(&hardware_enable_failed)) { |
| 3105 | hardware_disable_all_nolock(); |
| 3106 | r = -EBUSY; |
| 3107 | } |
| 3108 | } |
| 3109 | |
Paolo Bonzini | 4a937f9 | 2013-09-10 12:58:35 +0200 | [diff] [blame] | 3110 | raw_spin_unlock(&kvm_count_lock); |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 3111 | |
| 3112 | return r; |
| 3113 | } |
| 3114 | |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 3115 | static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val, |
| 3116 | void *v) |
| 3117 | { |
Avi Kivity | 1a6f4d7 | 2007-11-11 18:37:32 +0200 | [diff] [blame] | 3118 | val &= ~CPU_TASKS_FROZEN; |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 3119 | switch (val) { |
Avi Kivity | cec9ad2 | 2007-05-24 13:11:41 +0300 | [diff] [blame] | 3120 | case CPU_DYING: |
Paolo Bonzini | 4fa92fb | 2013-09-10 12:57:17 +0200 | [diff] [blame] | 3121 | hardware_disable(); |
Avi Kivity | 6ec8a856 | 2007-08-19 15:57:26 +0300 | [diff] [blame] | 3122 | break; |
Zachary Amsden | da908f2 | 2010-08-19 22:07:27 -1000 | [diff] [blame] | 3123 | case CPU_STARTING: |
Paolo Bonzini | 4fa92fb | 2013-09-10 12:57:17 +0200 | [diff] [blame] | 3124 | hardware_enable(); |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 3125 | break; |
| 3126 | } |
| 3127 | return NOTIFY_OK; |
| 3128 | } |
| 3129 | |
Rusty Russell | 9a2b85c | 2007-07-17 23:17:55 +1000 | [diff] [blame] | 3130 | static int kvm_reboot(struct notifier_block *notifier, unsigned long val, |
Mike Day | d77c26f | 2007-10-08 09:02:08 -0400 | [diff] [blame] | 3131 | void *v) |
Rusty Russell | 9a2b85c | 2007-07-17 23:17:55 +1000 | [diff] [blame] | 3132 | { |
Sheng Yang | 8e1c181 | 2009-04-29 11:09:04 +0800 | [diff] [blame] | 3133 | /* |
| 3134 | * Some (well, at least mine) BIOSes hang on reboot if |
| 3135 | * in vmx root mode. |
| 3136 | * |
| 3137 | * And Intel TXT required VMX off for all cpu when system shutdown. |
| 3138 | */ |
Xiubo Li | 1170adc | 2015-02-26 14:58:26 +0800 | [diff] [blame] | 3139 | pr_info("kvm: exiting hardware virtualization\n"); |
Sheng Yang | 8e1c181 | 2009-04-29 11:09:04 +0800 | [diff] [blame] | 3140 | kvm_rebooting = true; |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 3141 | on_each_cpu(hardware_disable_nolock, NULL, 1); |
Rusty Russell | 9a2b85c | 2007-07-17 23:17:55 +1000 | [diff] [blame] | 3142 | return NOTIFY_OK; |
| 3143 | } |
| 3144 | |
| 3145 | static struct notifier_block kvm_reboot_notifier = { |
| 3146 | .notifier_call = kvm_reboot, |
| 3147 | .priority = 0, |
| 3148 | }; |
| 3149 | |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 3150 | static void kvm_io_bus_destroy(struct kvm_io_bus *bus) |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 3151 | { |
| 3152 | int i; |
| 3153 | |
| 3154 | for (i = 0; i < bus->dev_count; i++) { |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 3155 | struct kvm_io_device *pos = bus->range[i].dev; |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 3156 | |
| 3157 | kvm_iodevice_destructor(pos); |
| 3158 | } |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 3159 | kfree(bus); |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 3160 | } |
| 3161 | |
Paolo Bonzini | c21fbff | 2013-08-27 15:41:41 +0200 | [diff] [blame] | 3162 | 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] | 3163 | const struct kvm_io_range *r2) |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 3164 | { |
Jason Wang | 8f4216c7 | 2015-09-15 14:41:57 +0800 | [diff] [blame] | 3165 | gpa_t addr1 = r1->addr; |
| 3166 | gpa_t addr2 = r2->addr; |
| 3167 | |
| 3168 | if (addr1 < addr2) |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 3169 | return -1; |
Jason Wang | 8f4216c7 | 2015-09-15 14:41:57 +0800 | [diff] [blame] | 3170 | |
| 3171 | /* If r2->len == 0, match the exact address. If r2->len != 0, |
| 3172 | * accept any overlapping write. Any order is acceptable for |
| 3173 | * overlapping ranges, because kvm_io_bus_get_first_dev ensures |
| 3174 | * we process all of them. |
| 3175 | */ |
| 3176 | if (r2->len) { |
| 3177 | addr1 += r1->len; |
| 3178 | addr2 += r2->len; |
| 3179 | } |
| 3180 | |
| 3181 | if (addr1 > addr2) |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 3182 | return 1; |
Jason Wang | 8f4216c7 | 2015-09-15 14:41:57 +0800 | [diff] [blame] | 3183 | |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 3184 | return 0; |
| 3185 | } |
| 3186 | |
Paolo Bonzini | a343c9b | 2013-07-16 13:03:29 +0200 | [diff] [blame] | 3187 | static int kvm_io_bus_sort_cmp(const void *p1, const void *p2) |
| 3188 | { |
Paolo Bonzini | c21fbff | 2013-08-27 15:41:41 +0200 | [diff] [blame] | 3189 | return kvm_io_bus_cmp(p1, p2); |
Paolo Bonzini | a343c9b | 2013-07-16 13:03:29 +0200 | [diff] [blame] | 3190 | } |
| 3191 | |
Geoff Levand | 39369f7 | 2013-04-05 19:20:30 +0000 | [diff] [blame] | 3192 | 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] | 3193 | gpa_t addr, int len) |
| 3194 | { |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 3195 | bus->range[bus->dev_count++] = (struct kvm_io_range) { |
| 3196 | .addr = addr, |
| 3197 | .len = len, |
| 3198 | .dev = dev, |
| 3199 | }; |
| 3200 | |
| 3201 | sort(bus->range, bus->dev_count, sizeof(struct kvm_io_range), |
| 3202 | kvm_io_bus_sort_cmp, NULL); |
| 3203 | |
| 3204 | return 0; |
| 3205 | } |
| 3206 | |
Geoff Levand | 39369f7 | 2013-04-05 19:20:30 +0000 | [diff] [blame] | 3207 | 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] | 3208 | gpa_t addr, int len) |
| 3209 | { |
| 3210 | struct kvm_io_range *range, key; |
| 3211 | int off; |
| 3212 | |
| 3213 | key = (struct kvm_io_range) { |
| 3214 | .addr = addr, |
| 3215 | .len = len, |
| 3216 | }; |
| 3217 | |
| 3218 | range = bsearch(&key, bus->range, bus->dev_count, |
| 3219 | sizeof(struct kvm_io_range), kvm_io_bus_sort_cmp); |
| 3220 | if (range == NULL) |
| 3221 | return -ENOENT; |
| 3222 | |
| 3223 | off = range - bus->range; |
| 3224 | |
Paolo Bonzini | c21fbff | 2013-08-27 15:41:41 +0200 | [diff] [blame] | 3225 | 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] | 3226 | off--; |
| 3227 | |
| 3228 | return off; |
| 3229 | } |
| 3230 | |
Nikolay Nikolaev | e32edf4 | 2015-03-26 14:39:28 +0000 | [diff] [blame] | 3231 | 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] | 3232 | struct kvm_io_range *range, const void *val) |
| 3233 | { |
| 3234 | int idx; |
| 3235 | |
| 3236 | idx = kvm_io_bus_get_first_dev(bus, range->addr, range->len); |
| 3237 | if (idx < 0) |
| 3238 | return -EOPNOTSUPP; |
| 3239 | |
| 3240 | while (idx < bus->dev_count && |
Paolo Bonzini | c21fbff | 2013-08-27 15:41:41 +0200 | [diff] [blame] | 3241 | kvm_io_bus_cmp(range, &bus->range[idx]) == 0) { |
Nikolay Nikolaev | e32edf4 | 2015-03-26 14:39:28 +0000 | [diff] [blame] | 3242 | if (!kvm_iodevice_write(vcpu, bus->range[idx].dev, range->addr, |
Cornelia Huck | 126a5af | 2013-07-03 16:30:53 +0200 | [diff] [blame] | 3243 | range->len, val)) |
| 3244 | return idx; |
| 3245 | idx++; |
| 3246 | } |
| 3247 | |
| 3248 | return -EOPNOTSUPP; |
| 3249 | } |
| 3250 | |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 3251 | /* kvm_io_bus_write - called under kvm->slots_lock */ |
Nikolay Nikolaev | e32edf4 | 2015-03-26 14:39:28 +0000 | [diff] [blame] | 3252 | 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] | 3253 | int len, const void *val) |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 3254 | { |
Cornelia Huck | 126a5af | 2013-07-03 16:30:53 +0200 | [diff] [blame] | 3255 | struct kvm_io_bus *bus; |
| 3256 | struct kvm_io_range range; |
| 3257 | int r; |
| 3258 | |
| 3259 | range = (struct kvm_io_range) { |
| 3260 | .addr = addr, |
| 3261 | .len = len, |
| 3262 | }; |
| 3263 | |
Nikolay Nikolaev | e32edf4 | 2015-03-26 14:39:28 +0000 | [diff] [blame] | 3264 | bus = srcu_dereference(vcpu->kvm->buses[bus_idx], &vcpu->kvm->srcu); |
| 3265 | r = __kvm_io_bus_write(vcpu, bus, &range, val); |
Cornelia Huck | 126a5af | 2013-07-03 16:30:53 +0200 | [diff] [blame] | 3266 | return r < 0 ? r : 0; |
| 3267 | } |
| 3268 | |
| 3269 | /* kvm_io_bus_write_cookie - called under kvm->slots_lock */ |
Nikolay Nikolaev | e32edf4 | 2015-03-26 14:39:28 +0000 | [diff] [blame] | 3270 | int kvm_io_bus_write_cookie(struct kvm_vcpu *vcpu, enum kvm_bus bus_idx, |
| 3271 | gpa_t addr, int len, const void *val, long cookie) |
Cornelia Huck | 126a5af | 2013-07-03 16:30:53 +0200 | [diff] [blame] | 3272 | { |
Lai Jiangshan | 90d83dc | 2010-04-19 17:41:23 +0800 | [diff] [blame] | 3273 | struct kvm_io_bus *bus; |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 3274 | struct kvm_io_range range; |
| 3275 | |
| 3276 | range = (struct kvm_io_range) { |
| 3277 | .addr = addr, |
| 3278 | .len = len, |
| 3279 | }; |
Lai Jiangshan | 90d83dc | 2010-04-19 17:41:23 +0800 | [diff] [blame] | 3280 | |
Nikolay Nikolaev | e32edf4 | 2015-03-26 14:39:28 +0000 | [diff] [blame] | 3281 | bus = srcu_dereference(vcpu->kvm->buses[bus_idx], &vcpu->kvm->srcu); |
Cornelia Huck | 126a5af | 2013-07-03 16:30:53 +0200 | [diff] [blame] | 3282 | |
| 3283 | /* First try the device referenced by cookie. */ |
| 3284 | if ((cookie >= 0) && (cookie < bus->dev_count) && |
Paolo Bonzini | c21fbff | 2013-08-27 15:41:41 +0200 | [diff] [blame] | 3285 | (kvm_io_bus_cmp(&range, &bus->range[cookie]) == 0)) |
Nikolay Nikolaev | e32edf4 | 2015-03-26 14:39:28 +0000 | [diff] [blame] | 3286 | if (!kvm_iodevice_write(vcpu, bus->range[cookie].dev, addr, len, |
Cornelia Huck | 126a5af | 2013-07-03 16:30:53 +0200 | [diff] [blame] | 3287 | val)) |
| 3288 | return cookie; |
| 3289 | |
| 3290 | /* |
| 3291 | * cookie contained garbage; fall back to search and return the |
| 3292 | * correct cookie value. |
| 3293 | */ |
Nikolay Nikolaev | e32edf4 | 2015-03-26 14:39:28 +0000 | [diff] [blame] | 3294 | return __kvm_io_bus_write(vcpu, bus, &range, val); |
Cornelia Huck | 126a5af | 2013-07-03 16:30:53 +0200 | [diff] [blame] | 3295 | } |
| 3296 | |
Nikolay Nikolaev | e32edf4 | 2015-03-26 14:39:28 +0000 | [diff] [blame] | 3297 | static int __kvm_io_bus_read(struct kvm_vcpu *vcpu, struct kvm_io_bus *bus, |
| 3298 | struct kvm_io_range *range, void *val) |
Cornelia Huck | 126a5af | 2013-07-03 16:30:53 +0200 | [diff] [blame] | 3299 | { |
| 3300 | int idx; |
| 3301 | |
| 3302 | idx = kvm_io_bus_get_first_dev(bus, range->addr, range->len); |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 3303 | if (idx < 0) |
| 3304 | return -EOPNOTSUPP; |
| 3305 | |
| 3306 | while (idx < bus->dev_count && |
Paolo Bonzini | c21fbff | 2013-08-27 15:41:41 +0200 | [diff] [blame] | 3307 | kvm_io_bus_cmp(range, &bus->range[idx]) == 0) { |
Nikolay Nikolaev | e32edf4 | 2015-03-26 14:39:28 +0000 | [diff] [blame] | 3308 | if (!kvm_iodevice_read(vcpu, bus->range[idx].dev, range->addr, |
Cornelia Huck | 126a5af | 2013-07-03 16:30:53 +0200 | [diff] [blame] | 3309 | range->len, val)) |
| 3310 | return idx; |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 3311 | idx++; |
| 3312 | } |
| 3313 | |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 3314 | return -EOPNOTSUPP; |
| 3315 | } |
Michael S. Tsirkin | 68c3b4d | 2014-03-31 21:50:44 +0300 | [diff] [blame] | 3316 | EXPORT_SYMBOL_GPL(kvm_io_bus_write); |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 3317 | |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 3318 | /* kvm_io_bus_read - called under kvm->slots_lock */ |
Nikolay Nikolaev | e32edf4 | 2015-03-26 14:39:28 +0000 | [diff] [blame] | 3319 | 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] | 3320 | int len, void *val) |
Michael S. Tsirkin | bda9020 | 2009-06-29 22:24:32 +0300 | [diff] [blame] | 3321 | { |
Cornelia Huck | 126a5af | 2013-07-03 16:30:53 +0200 | [diff] [blame] | 3322 | struct kvm_io_bus *bus; |
| 3323 | struct kvm_io_range range; |
| 3324 | int r; |
| 3325 | |
| 3326 | range = (struct kvm_io_range) { |
| 3327 | .addr = addr, |
| 3328 | .len = len, |
| 3329 | }; |
| 3330 | |
Nikolay Nikolaev | e32edf4 | 2015-03-26 14:39:28 +0000 | [diff] [blame] | 3331 | bus = srcu_dereference(vcpu->kvm->buses[bus_idx], &vcpu->kvm->srcu); |
| 3332 | r = __kvm_io_bus_read(vcpu, bus, &range, val); |
Cornelia Huck | 126a5af | 2013-07-03 16:30:53 +0200 | [diff] [blame] | 3333 | return r < 0 ? r : 0; |
| 3334 | } |
| 3335 | |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 3336 | |
Marcelo Tosatti | 79fac95 | 2009-12-23 14:35:26 -0200 | [diff] [blame] | 3337 | /* Caller must hold slots_lock. */ |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 3338 | int kvm_io_bus_register_dev(struct kvm *kvm, enum kvm_bus bus_idx, gpa_t addr, |
| 3339 | int len, struct kvm_io_device *dev) |
Michael S. Tsirkin | 6c47469 | 2009-06-29 22:24:26 +0300 | [diff] [blame] | 3340 | { |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 3341 | struct kvm_io_bus *new_bus, *bus; |
Gregory Haskins | 090b7af | 2009-07-07 17:08:44 -0400 | [diff] [blame] | 3342 | |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 3343 | bus = kvm->buses[bus_idx]; |
Amos Kong | 6ea34c9 | 2013-05-25 06:44:15 +0800 | [diff] [blame] | 3344 | /* exclude ioeventfd which is limited by maximum fd */ |
| 3345 | if (bus->dev_count - bus->ioeventfd_count > NR_IOBUS_DEVS - 1) |
Gregory Haskins | 090b7af | 2009-07-07 17:08:44 -0400 | [diff] [blame] | 3346 | return -ENOSPC; |
| 3347 | |
Jason Wang | d3febdd | 2015-08-25 17:05:46 +0800 | [diff] [blame] | 3348 | new_bus = kmalloc(sizeof(*bus) + ((bus->dev_count + 1) * |
Amos Kong | a1300716 | 2012-03-09 12:17:32 +0800 | [diff] [blame] | 3349 | sizeof(struct kvm_io_range)), GFP_KERNEL); |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 3350 | if (!new_bus) |
| 3351 | return -ENOMEM; |
Amos Kong | a1300716 | 2012-03-09 12:17:32 +0800 | [diff] [blame] | 3352 | memcpy(new_bus, bus, sizeof(*bus) + (bus->dev_count * |
| 3353 | sizeof(struct kvm_io_range))); |
Sasha Levin | 743eeb0 | 2011-07-27 16:00:48 +0300 | [diff] [blame] | 3354 | kvm_io_bus_insert_dev(new_bus, dev, addr, len); |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 3355 | rcu_assign_pointer(kvm->buses[bus_idx], new_bus); |
| 3356 | synchronize_srcu_expedited(&kvm->srcu); |
| 3357 | kfree(bus); |
Gregory Haskins | 090b7af | 2009-07-07 17:08:44 -0400 | [diff] [blame] | 3358 | |
| 3359 | return 0; |
| 3360 | } |
| 3361 | |
Marcelo Tosatti | 79fac95 | 2009-12-23 14:35:26 -0200 | [diff] [blame] | 3362 | /* Caller must hold slots_lock. */ |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 3363 | int kvm_io_bus_unregister_dev(struct kvm *kvm, enum kvm_bus bus_idx, |
| 3364 | struct kvm_io_device *dev) |
Gregory Haskins | 090b7af | 2009-07-07 17:08:44 -0400 | [diff] [blame] | 3365 | { |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 3366 | int i, r; |
| 3367 | struct kvm_io_bus *new_bus, *bus; |
Michael S. Tsirkin | 6c47469 | 2009-06-29 22:24:26 +0300 | [diff] [blame] | 3368 | |
Sasha Levin | cdfca7b | 2011-12-04 19:36:28 +0200 | [diff] [blame] | 3369 | bus = kvm->buses[bus_idx]; |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 3370 | r = -ENOENT; |
Amos Kong | a1300716 | 2012-03-09 12:17:32 +0800 | [diff] [blame] | 3371 | for (i = 0; i < bus->dev_count; i++) |
| 3372 | if (bus->range[i].dev == dev) { |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 3373 | r = 0; |
Gregory Haskins | 090b7af | 2009-07-07 17:08:44 -0400 | [diff] [blame] | 3374 | break; |
| 3375 | } |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 3376 | |
Amos Kong | a1300716 | 2012-03-09 12:17:32 +0800 | [diff] [blame] | 3377 | if (r) |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 3378 | return r; |
Amos Kong | a1300716 | 2012-03-09 12:17:32 +0800 | [diff] [blame] | 3379 | |
Jason Wang | d3febdd | 2015-08-25 17:05:46 +0800 | [diff] [blame] | 3380 | new_bus = kmalloc(sizeof(*bus) + ((bus->dev_count - 1) * |
Amos Kong | a1300716 | 2012-03-09 12:17:32 +0800 | [diff] [blame] | 3381 | sizeof(struct kvm_io_range)), GFP_KERNEL); |
| 3382 | if (!new_bus) |
| 3383 | return -ENOMEM; |
| 3384 | |
| 3385 | memcpy(new_bus, bus, sizeof(*bus) + i * sizeof(struct kvm_io_range)); |
| 3386 | new_bus->dev_count--; |
| 3387 | memcpy(new_bus->range + i, bus->range + i + 1, |
| 3388 | (new_bus->dev_count - i) * sizeof(struct kvm_io_range)); |
Marcelo Tosatti | e93f8a0 | 2009-12-23 14:35:24 -0200 | [diff] [blame] | 3389 | |
| 3390 | rcu_assign_pointer(kvm->buses[bus_idx], new_bus); |
| 3391 | synchronize_srcu_expedited(&kvm->srcu); |
| 3392 | kfree(bus); |
| 3393 | return r; |
Gregory Haskins | 2eeb2e9 | 2007-05-31 14:08:53 -0400 | [diff] [blame] | 3394 | } |
| 3395 | |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 3396 | static struct notifier_block kvm_cpu_notifier = { |
| 3397 | .notifier_call = kvm_cpu_hotplug, |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 3398 | }; |
| 3399 | |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 3400 | static int vm_stat_get(void *_offset, u64 *val) |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 3401 | { |
| 3402 | unsigned offset = (long)_offset; |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 3403 | struct kvm *kvm; |
| 3404 | |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 3405 | *val = 0; |
Paolo Bonzini | 2f303b7 | 2013-09-25 13:53:07 +0200 | [diff] [blame] | 3406 | spin_lock(&kvm_lock); |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 3407 | list_for_each_entry(kvm, &vm_list, vm_list) |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 3408 | *val += *(u32 *)((void *)kvm + offset); |
Paolo Bonzini | 2f303b7 | 2013-09-25 13:53:07 +0200 | [diff] [blame] | 3409 | spin_unlock(&kvm_lock); |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 3410 | return 0; |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 3411 | } |
| 3412 | |
| 3413 | DEFINE_SIMPLE_ATTRIBUTE(vm_stat_fops, vm_stat_get, NULL, "%llu\n"); |
| 3414 | |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 3415 | static int vcpu_stat_get(void *_offset, u64 *val) |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 3416 | { |
| 3417 | unsigned offset = (long)_offset; |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 3418 | struct kvm *kvm; |
| 3419 | struct kvm_vcpu *vcpu; |
| 3420 | int i; |
| 3421 | |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 3422 | *val = 0; |
Paolo Bonzini | 2f303b7 | 2013-09-25 13:53:07 +0200 | [diff] [blame] | 3423 | spin_lock(&kvm_lock); |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 3424 | list_for_each_entry(kvm, &vm_list, vm_list) |
Gleb Natapov | 988a2ca | 2009-06-09 15:56:29 +0300 | [diff] [blame] | 3425 | kvm_for_each_vcpu(i, vcpu, kvm) |
| 3426 | *val += *(u32 *)((void *)vcpu + offset); |
| 3427 | |
Paolo Bonzini | 2f303b7 | 2013-09-25 13:53:07 +0200 | [diff] [blame] | 3428 | spin_unlock(&kvm_lock); |
Christoph Hellwig | 8b88b09 | 2008-02-08 04:20:26 -0800 | [diff] [blame] | 3429 | return 0; |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 3430 | } |
| 3431 | |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 3432 | DEFINE_SIMPLE_ATTRIBUTE(vcpu_stat_fops, vcpu_stat_get, NULL, "%llu\n"); |
| 3433 | |
Alexey Dobriyan | 828c095 | 2009-10-01 15:43:56 -0700 | [diff] [blame] | 3434 | static const struct file_operations *stat_fops[] = { |
Avi Kivity | ba1389b | 2007-11-18 16:24:12 +0200 | [diff] [blame] | 3435 | [KVM_STAT_VCPU] = &vcpu_stat_fops, |
| 3436 | [KVM_STAT_VM] = &vm_stat_fops, |
| 3437 | }; |
Avi Kivity | 1165f5f | 2007-04-19 17:27:43 +0300 | [diff] [blame] | 3438 | |
Hamo | 4f69b68 | 2011-12-15 14:23:16 +0800 | [diff] [blame] | 3439 | static int kvm_init_debug(void) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3440 | { |
Paolo Bonzini | 0c8eb04 | 2013-10-30 12:12:13 +0100 | [diff] [blame] | 3441 | int r = -EEXIST; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3442 | struct kvm_stats_debugfs_item *p; |
| 3443 | |
Hollis Blanchard | 76f7c87 | 2008-04-15 16:05:42 -0500 | [diff] [blame] | 3444 | kvm_debugfs_dir = debugfs_create_dir("kvm", NULL); |
Hamo | 4f69b68 | 2011-12-15 14:23:16 +0800 | [diff] [blame] | 3445 | if (kvm_debugfs_dir == NULL) |
| 3446 | goto out; |
| 3447 | |
| 3448 | for (p = debugfs_entries; p->name; ++p) { |
Janosch Frank | 4bd33b5 | 2015-10-14 12:37:35 +0200 | [diff] [blame] | 3449 | if (!debugfs_create_file(p->name, 0444, kvm_debugfs_dir, |
| 3450 | (void *)(long)p->offset, |
| 3451 | stat_fops[p->kind])) |
Hamo | 4f69b68 | 2011-12-15 14:23:16 +0800 | [diff] [blame] | 3452 | goto out_dir; |
| 3453 | } |
| 3454 | |
| 3455 | return 0; |
| 3456 | |
| 3457 | out_dir: |
| 3458 | debugfs_remove_recursive(kvm_debugfs_dir); |
| 3459 | out: |
| 3460 | return r; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3461 | } |
| 3462 | |
Rafael J. Wysocki | fb3600c | 2011-03-23 22:16:23 +0100 | [diff] [blame] | 3463 | static int kvm_suspend(void) |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 3464 | { |
Alexander Graf | 10474ae | 2009-09-15 11:37:46 +0200 | [diff] [blame] | 3465 | if (kvm_usage_count) |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 3466 | hardware_disable_nolock(NULL); |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 3467 | return 0; |
| 3468 | } |
| 3469 | |
Rafael J. Wysocki | fb3600c | 2011-03-23 22:16:23 +0100 | [diff] [blame] | 3470 | static void kvm_resume(void) |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 3471 | { |
Zachary Amsden | ca84d1a | 2010-08-19 22:07:28 -1000 | [diff] [blame] | 3472 | if (kvm_usage_count) { |
Paolo Bonzini | 4a937f9 | 2013-09-10 12:58:35 +0200 | [diff] [blame] | 3473 | WARN_ON(raw_spin_is_locked(&kvm_count_lock)); |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 3474 | hardware_enable_nolock(NULL); |
Zachary Amsden | ca84d1a | 2010-08-19 22:07:28 -1000 | [diff] [blame] | 3475 | } |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 3476 | } |
| 3477 | |
Rafael J. Wysocki | fb3600c | 2011-03-23 22:16:23 +0100 | [diff] [blame] | 3478 | static struct syscore_ops kvm_syscore_ops = { |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 3479 | .suspend = kvm_suspend, |
| 3480 | .resume = kvm_resume, |
| 3481 | }; |
| 3482 | |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 3483 | static inline |
| 3484 | struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn) |
| 3485 | { |
| 3486 | return container_of(pn, struct kvm_vcpu, preempt_notifier); |
| 3487 | } |
| 3488 | |
| 3489 | static void kvm_sched_in(struct preempt_notifier *pn, int cpu) |
| 3490 | { |
| 3491 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); |
Xiubo Li | f95ef0c | 2015-02-26 14:58:23 +0800 | [diff] [blame] | 3492 | |
Raghavendra K T | 3a08a8f | 2013-03-04 23:32:07 +0530 | [diff] [blame] | 3493 | if (vcpu->preempted) |
| 3494 | vcpu->preempted = false; |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 3495 | |
Radim Krčmář | e790d9e | 2014-08-21 18:08:05 +0200 | [diff] [blame] | 3496 | kvm_arch_sched_in(vcpu, cpu); |
| 3497 | |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 3498 | kvm_arch_vcpu_load(vcpu, cpu); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 3499 | } |
| 3500 | |
| 3501 | static void kvm_sched_out(struct preempt_notifier *pn, |
| 3502 | struct task_struct *next) |
| 3503 | { |
| 3504 | struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn); |
| 3505 | |
Raghavendra K T | 3a08a8f | 2013-03-04 23:32:07 +0530 | [diff] [blame] | 3506 | if (current->state == TASK_RUNNING) |
| 3507 | vcpu->preempted = true; |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 3508 | kvm_arch_vcpu_put(vcpu); |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 3509 | } |
| 3510 | |
Avi Kivity | 0ee75be | 2010-04-28 15:39:01 +0300 | [diff] [blame] | 3511 | int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align, |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 3512 | struct module *module) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3513 | { |
| 3514 | int r; |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 3515 | int cpu; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3516 | |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 3517 | r = kvm_arch_init(opaque); |
| 3518 | if (r) |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 3519 | goto out_fail; |
Zhang Xiantao | cb498ea | 2007-11-14 20:39:31 +0800 | [diff] [blame] | 3520 | |
Asias He | 7dac16c | 2013-05-08 10:57:29 +0800 | [diff] [blame] | 3521 | /* |
| 3522 | * kvm_arch_init makes sure there's at most one caller |
| 3523 | * for architectures that support multiple implementations, |
| 3524 | * like intel and amd on x86. |
| 3525 | * kvm_arch_init must be called before kvm_irqfd_init to avoid creating |
| 3526 | * conflicts in case kvm is already setup for another implementation. |
| 3527 | */ |
| 3528 | r = kvm_irqfd_init(); |
| 3529 | if (r) |
| 3530 | goto out_irqfd; |
| 3531 | |
Avi Kivity | 8437a61 | 2009-06-06 14:52:35 -0700 | [diff] [blame] | 3532 | if (!zalloc_cpumask_var(&cpus_hardware_enabled, GFP_KERNEL)) { |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 3533 | r = -ENOMEM; |
| 3534 | goto out_free_0; |
| 3535 | } |
| 3536 | |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 3537 | r = kvm_arch_hardware_setup(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3538 | if (r < 0) |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 3539 | goto out_free_0a; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3540 | |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 3541 | for_each_online_cpu(cpu) { |
| 3542 | smp_call_function_single(cpu, |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 3543 | kvm_arch_check_processor_compat, |
Jens Axboe | 8691e5a | 2008-06-06 11:18:06 +0200 | [diff] [blame] | 3544 | &r, 1); |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 3545 | if (r < 0) |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 3546 | goto out_free_1; |
Yang, Sheng | 002c7f7 | 2007-07-31 14:23:01 +0300 | [diff] [blame] | 3547 | } |
| 3548 | |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 3549 | r = register_cpu_notifier(&kvm_cpu_notifier); |
| 3550 | if (r) |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 3551 | goto out_free_2; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3552 | register_reboot_notifier(&kvm_reboot_notifier); |
| 3553 | |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 3554 | /* A kmem cache lets us meet the alignment requirements of fx_save. */ |
Avi Kivity | 0ee75be | 2010-04-28 15:39:01 +0300 | [diff] [blame] | 3555 | if (!vcpu_align) |
| 3556 | vcpu_align = __alignof__(struct kvm_vcpu); |
| 3557 | kvm_vcpu_cache = kmem_cache_create("kvm_vcpu", vcpu_size, vcpu_align, |
Joe Perches | 56919c5 | 2007-11-12 20:06:51 -0800 | [diff] [blame] | 3558 | 0, NULL); |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 3559 | if (!kvm_vcpu_cache) { |
| 3560 | r = -ENOMEM; |
Rafael J. Wysocki | fb3600c | 2011-03-23 22:16:23 +0100 | [diff] [blame] | 3561 | goto out_free_3; |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 3562 | } |
| 3563 | |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 3564 | r = kvm_async_pf_init(); |
| 3565 | if (r) |
| 3566 | goto out_free; |
| 3567 | |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3568 | kvm_chardev_ops.owner = module; |
Christian Borntraeger | 3d3aab1 | 2008-12-02 11:17:32 +0100 | [diff] [blame] | 3569 | kvm_vm_fops.owner = module; |
| 3570 | kvm_vcpu_fops.owner = module; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3571 | |
| 3572 | r = misc_register(&kvm_dev); |
| 3573 | if (r) { |
Xiubo Li | 1170adc | 2015-02-26 14:58:26 +0800 | [diff] [blame] | 3574 | pr_err("kvm: misc device register failed\n"); |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 3575 | goto out_unreg; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3576 | } |
| 3577 | |
Rafael J. Wysocki | fb3600c | 2011-03-23 22:16:23 +0100 | [diff] [blame] | 3578 | register_syscore_ops(&kvm_syscore_ops); |
| 3579 | |
Avi Kivity | 15ad714 | 2007-07-11 18:17:21 +0300 | [diff] [blame] | 3580 | kvm_preempt_ops.sched_in = kvm_sched_in; |
| 3581 | kvm_preempt_ops.sched_out = kvm_sched_out; |
| 3582 | |
Hamo | 4f69b68 | 2011-12-15 14:23:16 +0800 | [diff] [blame] | 3583 | r = kvm_init_debug(); |
| 3584 | if (r) { |
Xiubo Li | 1170adc | 2015-02-26 14:58:26 +0800 | [diff] [blame] | 3585 | pr_err("kvm: create debugfs files failed\n"); |
Hamo | 4f69b68 | 2011-12-15 14:23:16 +0800 | [diff] [blame] | 3586 | goto out_undebugfs; |
| 3587 | } |
Darrick J. Wong | 0ea4ed8 | 2009-10-14 16:21:00 -0700 | [diff] [blame] | 3588 | |
Paolo Bonzini | 3c3c29f | 2014-09-24 13:02:46 +0200 | [diff] [blame] | 3589 | r = kvm_vfio_ops_init(); |
| 3590 | WARN_ON(r); |
| 3591 | |
Avi Kivity | c7addb9 | 2007-09-16 18:58:32 +0200 | [diff] [blame] | 3592 | return 0; |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3593 | |
Hamo | 4f69b68 | 2011-12-15 14:23:16 +0800 | [diff] [blame] | 3594 | out_undebugfs: |
| 3595 | unregister_syscore_ops(&kvm_syscore_ops); |
Wei Yongjun | afc2f79 | 2013-05-05 20:03:40 +0800 | [diff] [blame] | 3596 | misc_deregister(&kvm_dev); |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 3597 | out_unreg: |
| 3598 | kvm_async_pf_deinit(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3599 | out_free: |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 3600 | kmem_cache_destroy(kvm_vcpu_cache); |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 3601 | out_free_3: |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3602 | unregister_reboot_notifier(&kvm_reboot_notifier); |
Avi Kivity | 774c47f | 2007-02-12 00:54:47 -0800 | [diff] [blame] | 3603 | unregister_cpu_notifier(&kvm_cpu_notifier); |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 3604 | out_free_2: |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 3605 | out_free_1: |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 3606 | kvm_arch_hardware_unsetup(); |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 3607 | out_free_0a: |
| 3608 | free_cpumask_var(cpus_hardware_enabled); |
Zhang Xiantao | d2308784 | 2007-11-29 15:35:39 +0800 | [diff] [blame] | 3609 | out_free_0: |
Cornelia Huck | a0f155e | 2013-02-28 12:33:18 +0100 | [diff] [blame] | 3610 | kvm_irqfd_exit(); |
| 3611 | out_irqfd: |
Asias He | 7dac16c | 2013-05-08 10:57:29 +0800 | [diff] [blame] | 3612 | kvm_arch_exit(); |
| 3613 | out_fail: |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3614 | return r; |
| 3615 | } |
Zhang Xiantao | cb498ea | 2007-11-14 20:39:31 +0800 | [diff] [blame] | 3616 | EXPORT_SYMBOL_GPL(kvm_init); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3617 | |
Zhang Xiantao | cb498ea | 2007-11-14 20:39:31 +0800 | [diff] [blame] | 3618 | void kvm_exit(void) |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3619 | { |
Janosch Frank | 4bd33b5 | 2015-10-14 12:37:35 +0200 | [diff] [blame] | 3620 | debugfs_remove_recursive(kvm_debugfs_dir); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3621 | misc_deregister(&kvm_dev); |
Rusty Russell | c16f862 | 2007-07-30 21:12:19 +1000 | [diff] [blame] | 3622 | kmem_cache_destroy(kvm_vcpu_cache); |
Gleb Natapov | af585b9 | 2010-10-14 11:22:46 +0200 | [diff] [blame] | 3623 | kvm_async_pf_deinit(); |
Rafael J. Wysocki | fb3600c | 2011-03-23 22:16:23 +0100 | [diff] [blame] | 3624 | unregister_syscore_ops(&kvm_syscore_ops); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3625 | unregister_reboot_notifier(&kvm_reboot_notifier); |
Avi Kivity | 59ae6c6 | 2007-02-12 00:54:48 -0800 | [diff] [blame] | 3626 | unregister_cpu_notifier(&kvm_cpu_notifier); |
Takuya Yoshikawa | 75b7127 | 2010-11-16 17:37:41 +0900 | [diff] [blame] | 3627 | on_each_cpu(hardware_disable_nolock, NULL, 1); |
Zhang Xiantao | e9b11c1 | 2007-11-14 20:38:21 +0800 | [diff] [blame] | 3628 | kvm_arch_hardware_unsetup(); |
Zhang Xiantao | f8c16bb | 2007-11-14 20:40:21 +0800 | [diff] [blame] | 3629 | kvm_arch_exit(); |
Cornelia Huck | a0f155e | 2013-02-28 12:33:18 +0100 | [diff] [blame] | 3630 | kvm_irqfd_exit(); |
Rusty Russell | 7f59f49 | 2008-12-07 21:25:45 +1030 | [diff] [blame] | 3631 | free_cpumask_var(cpus_hardware_enabled); |
Wanpeng Li | 571ee1b | 2014-10-09 18:30:08 +0800 | [diff] [blame] | 3632 | kvm_vfio_ops_exit(); |
Avi Kivity | 6aa8b73 | 2006-12-10 02:21:36 -0800 | [diff] [blame] | 3633 | } |
Zhang Xiantao | cb498ea | 2007-11-14 20:39:31 +0800 | [diff] [blame] | 3634 | EXPORT_SYMBOL_GPL(kvm_exit); |