Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2012 - Virtual Open Systems and Columbia University |
| 3 | * Author: Christoffer Dall <c.dall@virtualopensystems.com> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License, version 2, as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write to the Free Software |
| 16 | * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
| 17 | */ |
| 18 | |
Lorenzo Pieralisi | 1fcf7ce | 2013-08-05 15:04:46 +0100 | [diff] [blame] | 19 | #include <linux/cpu_pm.h> |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 20 | #include <linux/errno.h> |
| 21 | #include <linux/err.h> |
| 22 | #include <linux/kvm_host.h> |
Andre Przywara | 1085fdc | 2016-07-15 12:43:31 +0100 | [diff] [blame] | 23 | #include <linux/list.h> |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 24 | #include <linux/module.h> |
| 25 | #include <linux/vmalloc.h> |
| 26 | #include <linux/fs.h> |
| 27 | #include <linux/mman.h> |
| 28 | #include <linux/sched.h> |
Christoffer Dall | 86ce853 | 2013-01-20 18:28:08 -0500 | [diff] [blame] | 29 | #include <linux/kvm.h> |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 30 | #include <trace/events/kvm.h> |
Shannon Zhao | b02386e | 2016-02-26 19:29:19 +0800 | [diff] [blame] | 31 | #include <kvm/arm_pmu.h> |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 32 | |
| 33 | #define CREATE_TRACE_POINTS |
| 34 | #include "trace.h" |
| 35 | |
Linus Torvalds | 7c0f6ba | 2016-12-24 11:46:01 -0800 | [diff] [blame] | 36 | #include <linux/uaccess.h> |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 37 | #include <asm/ptrace.h> |
| 38 | #include <asm/mman.h> |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 39 | #include <asm/tlbflush.h> |
Christoffer Dall | 5b3e5e5 | 2013-01-20 18:28:09 -0500 | [diff] [blame] | 40 | #include <asm/cacheflush.h> |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 41 | #include <asm/virt.h> |
| 42 | #include <asm/kvm_arm.h> |
| 43 | #include <asm/kvm_asm.h> |
| 44 | #include <asm/kvm_mmu.h> |
Christoffer Dall | f7ed45b | 2013-01-20 18:47:42 -0500 | [diff] [blame] | 45 | #include <asm/kvm_emulate.h> |
Christoffer Dall | 5b3e5e5 | 2013-01-20 18:28:09 -0500 | [diff] [blame] | 46 | #include <asm/kvm_coproc.h> |
Marc Zyngier | aa024c2 | 2013-01-20 18:28:13 -0500 | [diff] [blame] | 47 | #include <asm/kvm_psci.h> |
Marc Zyngier | 910917b | 2015-10-27 12:18:48 +0000 | [diff] [blame] | 48 | #include <asm/sections.h> |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 49 | |
| 50 | #ifdef REQUIRES_VIRT |
| 51 | __asm__(".arch_extension virt"); |
| 52 | #endif |
| 53 | |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 54 | static DEFINE_PER_CPU(unsigned long, kvm_arm_hyp_stack_page); |
Marc Zyngier | 3de50da | 2013-04-08 16:47:19 +0100 | [diff] [blame] | 55 | static kvm_cpu_context_t __percpu *kvm_host_cpu_state; |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 56 | static unsigned long hyp_default_vectors; |
| 57 | |
Marc Zyngier | 1638a12 | 2013-01-21 19:36:11 -0500 | [diff] [blame] | 58 | /* Per-CPU variable containing the currently running vcpu. */ |
| 59 | static DEFINE_PER_CPU(struct kvm_vcpu *, kvm_arm_running_vcpu); |
| 60 | |
Christoffer Dall | f7ed45b | 2013-01-20 18:47:42 -0500 | [diff] [blame] | 61 | /* The VMID used in the VTTBR */ |
| 62 | static atomic64_t kvm_vmid_gen = ATOMIC64_INIT(1); |
Vladimir Murzin | 20475f7 | 2015-11-16 11:28:18 +0000 | [diff] [blame] | 63 | static u32 kvm_next_vmid; |
| 64 | static unsigned int kvm_vmid_bits __read_mostly; |
Christoffer Dall | f7ed45b | 2013-01-20 18:47:42 -0500 | [diff] [blame] | 65 | static DEFINE_SPINLOCK(kvm_vmid_lock); |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 66 | |
Pavel Fedin | c7da6fa | 2015-12-18 14:38:43 +0300 | [diff] [blame] | 67 | static bool vgic_present; |
| 68 | |
AKASHI Takahiro | 67f6919 | 2016-04-27 17:47:05 +0100 | [diff] [blame] | 69 | static DEFINE_PER_CPU(unsigned char, kvm_arm_hardware_enabled); |
| 70 | |
Marc Zyngier | 1638a12 | 2013-01-21 19:36:11 -0500 | [diff] [blame] | 71 | static void kvm_arm_set_running_vcpu(struct kvm_vcpu *vcpu) |
| 72 | { |
| 73 | BUG_ON(preemptible()); |
Christoph Lameter | 1436c1a | 2013-10-21 13:17:08 +0100 | [diff] [blame] | 74 | __this_cpu_write(kvm_arm_running_vcpu, vcpu); |
Marc Zyngier | 1638a12 | 2013-01-21 19:36:11 -0500 | [diff] [blame] | 75 | } |
| 76 | |
| 77 | /** |
| 78 | * kvm_arm_get_running_vcpu - get the vcpu running on the current CPU. |
| 79 | * Must be called from non-preemptible context |
| 80 | */ |
| 81 | struct kvm_vcpu *kvm_arm_get_running_vcpu(void) |
| 82 | { |
| 83 | BUG_ON(preemptible()); |
Christoph Lameter | 1436c1a | 2013-10-21 13:17:08 +0100 | [diff] [blame] | 84 | return __this_cpu_read(kvm_arm_running_vcpu); |
Marc Zyngier | 1638a12 | 2013-01-21 19:36:11 -0500 | [diff] [blame] | 85 | } |
| 86 | |
| 87 | /** |
| 88 | * kvm_arm_get_running_vcpus - get the per-CPU array of currently running vcpus. |
| 89 | */ |
Will Deacon | 4000be4 | 2014-08-26 15:13:21 +0100 | [diff] [blame] | 90 | struct kvm_vcpu * __percpu *kvm_get_running_vcpus(void) |
Marc Zyngier | 1638a12 | 2013-01-21 19:36:11 -0500 | [diff] [blame] | 91 | { |
| 92 | return &kvm_arm_running_vcpu; |
| 93 | } |
| 94 | |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 95 | int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu) |
| 96 | { |
| 97 | return kvm_vcpu_exiting_guest_mode(vcpu) == IN_GUEST_MODE; |
| 98 | } |
| 99 | |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 100 | int kvm_arch_hardware_setup(void) |
| 101 | { |
| 102 | return 0; |
| 103 | } |
| 104 | |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 105 | void kvm_arch_check_processor_compat(void *rtn) |
| 106 | { |
| 107 | *(int *)rtn = 0; |
| 108 | } |
| 109 | |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 110 | |
Christoffer Dall | d5d8184 | 2013-01-20 18:28:07 -0500 | [diff] [blame] | 111 | /** |
| 112 | * kvm_arch_init_vm - initializes a VM data structure |
| 113 | * @kvm: pointer to the KVM struct |
| 114 | */ |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 115 | int kvm_arch_init_vm(struct kvm *kvm, unsigned long type) |
| 116 | { |
Marc Zyngier | 94d0e59 | 2016-10-18 18:37:49 +0100 | [diff] [blame] | 117 | int ret, cpu; |
Christoffer Dall | d5d8184 | 2013-01-20 18:28:07 -0500 | [diff] [blame] | 118 | |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 119 | if (type) |
| 120 | return -EINVAL; |
| 121 | |
Marc Zyngier | 94d0e59 | 2016-10-18 18:37:49 +0100 | [diff] [blame] | 122 | kvm->arch.last_vcpu_ran = alloc_percpu(typeof(*kvm->arch.last_vcpu_ran)); |
| 123 | if (!kvm->arch.last_vcpu_ran) |
| 124 | return -ENOMEM; |
| 125 | |
| 126 | for_each_possible_cpu(cpu) |
| 127 | *per_cpu_ptr(kvm->arch.last_vcpu_ran, cpu) = -1; |
| 128 | |
Christoffer Dall | d5d8184 | 2013-01-20 18:28:07 -0500 | [diff] [blame] | 129 | ret = kvm_alloc_stage2_pgd(kvm); |
| 130 | if (ret) |
| 131 | goto out_fail_alloc; |
| 132 | |
Marc Zyngier | c8dddec | 2016-06-13 15:00:45 +0100 | [diff] [blame] | 133 | ret = create_hyp_mappings(kvm, kvm + 1, PAGE_HYP); |
Christoffer Dall | d5d8184 | 2013-01-20 18:28:07 -0500 | [diff] [blame] | 134 | if (ret) |
| 135 | goto out_free_stage2_pgd; |
| 136 | |
Marc Zyngier | 6c3d63c | 2014-06-23 17:37:18 +0100 | [diff] [blame] | 137 | kvm_vgic_early_init(kvm); |
Christoffer Dall | a1a6438 | 2013-11-16 10:51:25 -0800 | [diff] [blame] | 138 | kvm_timer_init(kvm); |
| 139 | |
Christoffer Dall | d5d8184 | 2013-01-20 18:28:07 -0500 | [diff] [blame] | 140 | /* Mark the initial VMID generation invalid */ |
| 141 | kvm->arch.vmid_gen = 0; |
| 142 | |
Andre Przywara | 3caa2d8 | 2014-06-02 16:26:01 +0200 | [diff] [blame] | 143 | /* The maximum number of VCPUs is limited by the host's GIC model */ |
Pavel Fedin | c7da6fa | 2015-12-18 14:38:43 +0300 | [diff] [blame] | 144 | kvm->arch.max_vcpus = vgic_present ? |
| 145 | kvm_vgic_get_max_vcpus() : KVM_MAX_VCPUS; |
Andre Przywara | 3caa2d8 | 2014-06-02 16:26:01 +0200 | [diff] [blame] | 146 | |
Christoffer Dall | d5d8184 | 2013-01-20 18:28:07 -0500 | [diff] [blame] | 147 | return ret; |
| 148 | out_free_stage2_pgd: |
| 149 | kvm_free_stage2_pgd(kvm); |
| 150 | out_fail_alloc: |
Marc Zyngier | 94d0e59 | 2016-10-18 18:37:49 +0100 | [diff] [blame] | 151 | free_percpu(kvm->arch.last_vcpu_ran); |
| 152 | kvm->arch.last_vcpu_ran = NULL; |
Christoffer Dall | d5d8184 | 2013-01-20 18:28:07 -0500 | [diff] [blame] | 153 | return ret; |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 154 | } |
| 155 | |
Luiz Capitulino | 235539b | 2016-09-07 14:47:23 -0400 | [diff] [blame] | 156 | bool kvm_arch_has_vcpu_debugfs(void) |
| 157 | { |
| 158 | return false; |
| 159 | } |
| 160 | |
| 161 | int kvm_arch_create_vcpu_debugfs(struct kvm_vcpu *vcpu) |
| 162 | { |
| 163 | return 0; |
| 164 | } |
| 165 | |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 166 | int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf) |
| 167 | { |
| 168 | return VM_FAULT_SIGBUS; |
| 169 | } |
| 170 | |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 171 | |
Christoffer Dall | d5d8184 | 2013-01-20 18:28:07 -0500 | [diff] [blame] | 172 | /** |
| 173 | * kvm_arch_destroy_vm - destroy the VM data structure |
| 174 | * @kvm: pointer to the KVM struct |
| 175 | */ |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 176 | void kvm_arch_destroy_vm(struct kvm *kvm) |
| 177 | { |
| 178 | int i; |
| 179 | |
Marc Zyngier | 94d0e59 | 2016-10-18 18:37:49 +0100 | [diff] [blame] | 180 | free_percpu(kvm->arch.last_vcpu_ran); |
| 181 | kvm->arch.last_vcpu_ran = NULL; |
| 182 | |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 183 | for (i = 0; i < KVM_MAX_VCPUS; ++i) { |
| 184 | if (kvm->vcpus[i]) { |
| 185 | kvm_arch_vcpu_free(kvm->vcpus[i]); |
| 186 | kvm->vcpus[i] = NULL; |
| 187 | } |
| 188 | } |
Marc Zyngier | c1bfb57 | 2014-07-08 12:09:01 +0100 | [diff] [blame] | 189 | |
| 190 | kvm_vgic_destroy(kvm); |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 191 | } |
| 192 | |
Alexander Graf | 784aa3d | 2014-07-14 18:27:35 +0200 | [diff] [blame] | 193 | int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 194 | { |
| 195 | int r; |
| 196 | switch (ext) { |
Marc Zyngier | 1a89dd9 | 2013-01-21 19:36:12 -0500 | [diff] [blame] | 197 | case KVM_CAP_IRQCHIP: |
Pavel Fedin | c7da6fa | 2015-12-18 14:38:43 +0300 | [diff] [blame] | 198 | r = vgic_present; |
| 199 | break; |
Nikolay Nikolaev | d44758c | 2015-01-24 12:00:02 +0000 | [diff] [blame] | 200 | case KVM_CAP_IOEVENTFD: |
Christoffer Dall | 7330672 | 2013-10-25 17:29:18 +0100 | [diff] [blame] | 201 | case KVM_CAP_DEVICE_CTRL: |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 202 | case KVM_CAP_USER_MEMORY: |
| 203 | case KVM_CAP_SYNC_MMU: |
| 204 | case KVM_CAP_DESTROY_MEMORY_REGION_WORKS: |
| 205 | case KVM_CAP_ONE_REG: |
Marc Zyngier | aa024c2 | 2013-01-20 18:28:13 -0500 | [diff] [blame] | 206 | case KVM_CAP_ARM_PSCI: |
Anup Patel | 4447a20 | 2014-04-29 11:24:25 +0530 | [diff] [blame] | 207 | case KVM_CAP_ARM_PSCI_0_2: |
Christoffer Dall | 9804788 | 2014-08-19 12:18:04 +0200 | [diff] [blame] | 208 | case KVM_CAP_READONLY_MEM: |
Alex Bennée | ecccf0c | 2015-03-13 17:02:52 +0000 | [diff] [blame] | 209 | case KVM_CAP_MP_STATE: |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 210 | r = 1; |
| 211 | break; |
| 212 | case KVM_CAP_COALESCED_MMIO: |
| 213 | r = KVM_COALESCED_MMIO_PAGE_OFFSET; |
| 214 | break; |
Christoffer Dall | 3401d546 | 2013-01-23 13:18:04 -0500 | [diff] [blame] | 215 | case KVM_CAP_ARM_SET_DEVICE_ADDR: |
| 216 | r = 1; |
Marc Zyngier | ca46e10 | 2013-04-03 10:43:13 +0100 | [diff] [blame] | 217 | break; |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 218 | case KVM_CAP_NR_VCPUS: |
| 219 | r = num_online_cpus(); |
| 220 | break; |
| 221 | case KVM_CAP_MAX_VCPUS: |
| 222 | r = KVM_MAX_VCPUS; |
| 223 | break; |
Vladimir Murzin | 2988509 | 2016-11-02 11:55:34 +0000 | [diff] [blame] | 224 | case KVM_CAP_MSI_DEVID: |
| 225 | if (!kvm) |
| 226 | r = -EINVAL; |
| 227 | else |
| 228 | r = kvm->arch.vgic.msis_require_devid; |
| 229 | break; |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 230 | default: |
Andre Przywara | b46f01c | 2016-07-15 12:43:25 +0100 | [diff] [blame] | 231 | r = kvm_arch_dev_ioctl_check_extension(kvm, ext); |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 232 | break; |
| 233 | } |
| 234 | return r; |
| 235 | } |
| 236 | |
| 237 | long kvm_arch_dev_ioctl(struct file *filp, |
| 238 | unsigned int ioctl, unsigned long arg) |
| 239 | { |
| 240 | return -EINVAL; |
| 241 | } |
| 242 | |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 243 | |
| 244 | struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id) |
| 245 | { |
| 246 | int err; |
| 247 | struct kvm_vcpu *vcpu; |
| 248 | |
Christoffer Dall | 716139d | 2014-12-09 14:33:45 +0100 | [diff] [blame] | 249 | if (irqchip_in_kernel(kvm) && vgic_initialized(kvm)) { |
| 250 | err = -EBUSY; |
| 251 | goto out; |
| 252 | } |
| 253 | |
Andre Przywara | 3caa2d8 | 2014-06-02 16:26:01 +0200 | [diff] [blame] | 254 | if (id >= kvm->arch.max_vcpus) { |
| 255 | err = -EINVAL; |
| 256 | goto out; |
| 257 | } |
| 258 | |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 259 | vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); |
| 260 | if (!vcpu) { |
| 261 | err = -ENOMEM; |
| 262 | goto out; |
| 263 | } |
| 264 | |
| 265 | err = kvm_vcpu_init(vcpu, kvm, id); |
| 266 | if (err) |
| 267 | goto free_vcpu; |
| 268 | |
Marc Zyngier | c8dddec | 2016-06-13 15:00:45 +0100 | [diff] [blame] | 269 | err = create_hyp_mappings(vcpu, vcpu + 1, PAGE_HYP); |
Christoffer Dall | d5d8184 | 2013-01-20 18:28:07 -0500 | [diff] [blame] | 270 | if (err) |
| 271 | goto vcpu_uninit; |
| 272 | |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 273 | return vcpu; |
Christoffer Dall | d5d8184 | 2013-01-20 18:28:07 -0500 | [diff] [blame] | 274 | vcpu_uninit: |
| 275 | kvm_vcpu_uninit(vcpu); |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 276 | free_vcpu: |
| 277 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
| 278 | out: |
| 279 | return ERR_PTR(err); |
| 280 | } |
| 281 | |
Dominik Dingel | 31928aa | 2014-12-04 15:47:07 +0100 | [diff] [blame] | 282 | void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu) |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 283 | { |
Marc Zyngier | 6c3d63c | 2014-06-23 17:37:18 +0100 | [diff] [blame] | 284 | kvm_vgic_vcpu_early_init(vcpu); |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 285 | } |
| 286 | |
| 287 | void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu) |
| 288 | { |
Christoffer Dall | d5d8184 | 2013-01-20 18:28:07 -0500 | [diff] [blame] | 289 | kvm_mmu_free_memory_caches(vcpu); |
Marc Zyngier | 967f842 | 2013-01-23 13:21:59 -0500 | [diff] [blame] | 290 | kvm_timer_vcpu_terminate(vcpu); |
Marc Zyngier | c1bfb57 | 2014-07-08 12:09:01 +0100 | [diff] [blame] | 291 | kvm_vgic_vcpu_destroy(vcpu); |
Shannon Zhao | 5f0a714 | 2015-09-11 15:18:05 +0800 | [diff] [blame] | 292 | kvm_pmu_vcpu_destroy(vcpu); |
James Morse | 591d215 | 2016-06-08 17:24:45 +0100 | [diff] [blame] | 293 | kvm_vcpu_uninit(vcpu); |
Christoffer Dall | d5d8184 | 2013-01-20 18:28:07 -0500 | [diff] [blame] | 294 | kmem_cache_free(kvm_vcpu_cache, vcpu); |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 295 | } |
| 296 | |
| 297 | void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu) |
| 298 | { |
| 299 | kvm_arch_vcpu_free(vcpu); |
| 300 | } |
| 301 | |
| 302 | int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu) |
| 303 | { |
Christoffer Dall | 1a74847 | 2015-03-13 17:02:55 +0000 | [diff] [blame] | 304 | return kvm_timer_should_fire(vcpu); |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 305 | } |
| 306 | |
Christoffer Dall | d35268d | 2015-08-25 19:48:21 +0200 | [diff] [blame] | 307 | void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) |
| 308 | { |
| 309 | kvm_timer_schedule(vcpu); |
| 310 | } |
| 311 | |
| 312 | void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) |
| 313 | { |
| 314 | kvm_timer_unschedule(vcpu); |
| 315 | } |
| 316 | |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 317 | int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) |
| 318 | { |
Christoffer Dall | f7ed45b | 2013-01-20 18:47:42 -0500 | [diff] [blame] | 319 | /* Force users to call KVM_ARM_VCPU_INIT */ |
| 320 | vcpu->arch.target = -1; |
Christoffer Dall | f7fa034d | 2014-10-16 16:40:53 +0200 | [diff] [blame] | 321 | bitmap_zero(vcpu->arch.features, KVM_VCPU_MAX_FEATURES); |
Marc Zyngier | 1a89dd9 | 2013-01-21 19:36:12 -0500 | [diff] [blame] | 322 | |
Marc Zyngier | 967f842 | 2013-01-23 13:21:59 -0500 | [diff] [blame] | 323 | /* Set up the timer */ |
| 324 | kvm_timer_vcpu_init(vcpu); |
| 325 | |
Alex Bennée | 84e690b | 2015-07-07 17:30:00 +0100 | [diff] [blame] | 326 | kvm_arm_reset_debug_ptr(vcpu); |
| 327 | |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 328 | return 0; |
| 329 | } |
| 330 | |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 331 | void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
| 332 | { |
Marc Zyngier | 94d0e59 | 2016-10-18 18:37:49 +0100 | [diff] [blame] | 333 | int *last_ran; |
| 334 | |
| 335 | last_ran = this_cpu_ptr(vcpu->kvm->arch.last_vcpu_ran); |
| 336 | |
| 337 | /* |
| 338 | * We might get preempted before the vCPU actually runs, but |
| 339 | * over-invalidation doesn't affect correctness. |
| 340 | */ |
| 341 | if (*last_ran != vcpu->vcpu_id) { |
| 342 | kvm_call_hyp(__kvm_tlb_flush_local_vmid, vcpu); |
| 343 | *last_ran = vcpu->vcpu_id; |
| 344 | } |
| 345 | |
Christoffer Dall | 86ce853 | 2013-01-20 18:28:08 -0500 | [diff] [blame] | 346 | vcpu->cpu = cpu; |
Marc Zyngier | 3de50da | 2013-04-08 16:47:19 +0100 | [diff] [blame] | 347 | vcpu->arch.host_cpu_context = this_cpu_ptr(kvm_host_cpu_state); |
Christoffer Dall | 5b3e5e5 | 2013-01-20 18:28:09 -0500 | [diff] [blame] | 348 | |
Marc Zyngier | 1638a12 | 2013-01-21 19:36:11 -0500 | [diff] [blame] | 349 | kvm_arm_set_running_vcpu(vcpu); |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 350 | } |
| 351 | |
| 352 | void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) |
| 353 | { |
Christoffer Dall | e9b152c | 2013-12-11 20:29:11 -0800 | [diff] [blame] | 354 | /* |
| 355 | * The arch-generic KVM code expects the cpu field of a vcpu to be -1 |
| 356 | * if the vcpu is no longer assigned to a cpu. This is used for the |
| 357 | * optimized make_all_cpus_request path. |
| 358 | */ |
| 359 | vcpu->cpu = -1; |
| 360 | |
Marc Zyngier | 1638a12 | 2013-01-21 19:36:11 -0500 | [diff] [blame] | 361 | kvm_arm_set_running_vcpu(NULL); |
Marc Zyngier | 9b4a300 | 2016-01-29 19:04:48 +0000 | [diff] [blame] | 362 | kvm_timer_vcpu_put(vcpu); |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 363 | } |
| 364 | |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 365 | int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu, |
| 366 | struct kvm_mp_state *mp_state) |
| 367 | { |
Eric Auger | 3781528 | 2015-09-25 23:41:14 +0200 | [diff] [blame] | 368 | if (vcpu->arch.power_off) |
Alex Bennée | ecccf0c | 2015-03-13 17:02:52 +0000 | [diff] [blame] | 369 | mp_state->mp_state = KVM_MP_STATE_STOPPED; |
| 370 | else |
| 371 | mp_state->mp_state = KVM_MP_STATE_RUNNABLE; |
| 372 | |
| 373 | return 0; |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 374 | } |
| 375 | |
| 376 | int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu, |
| 377 | struct kvm_mp_state *mp_state) |
| 378 | { |
Alex Bennée | ecccf0c | 2015-03-13 17:02:52 +0000 | [diff] [blame] | 379 | switch (mp_state->mp_state) { |
| 380 | case KVM_MP_STATE_RUNNABLE: |
Eric Auger | 3781528 | 2015-09-25 23:41:14 +0200 | [diff] [blame] | 381 | vcpu->arch.power_off = false; |
Alex Bennée | ecccf0c | 2015-03-13 17:02:52 +0000 | [diff] [blame] | 382 | break; |
| 383 | case KVM_MP_STATE_STOPPED: |
Eric Auger | 3781528 | 2015-09-25 23:41:14 +0200 | [diff] [blame] | 384 | vcpu->arch.power_off = true; |
Alex Bennée | ecccf0c | 2015-03-13 17:02:52 +0000 | [diff] [blame] | 385 | break; |
| 386 | default: |
| 387 | return -EINVAL; |
| 388 | } |
| 389 | |
| 390 | return 0; |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 391 | } |
| 392 | |
Christoffer Dall | 5b3e5e5 | 2013-01-20 18:28:09 -0500 | [diff] [blame] | 393 | /** |
| 394 | * kvm_arch_vcpu_runnable - determine if the vcpu can be scheduled |
| 395 | * @v: The VCPU pointer |
| 396 | * |
| 397 | * If the guest CPU is not waiting for interrupts or an interrupt line is |
| 398 | * asserted, the CPU is by definition runnable. |
| 399 | */ |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 400 | int kvm_arch_vcpu_runnable(struct kvm_vcpu *v) |
| 401 | { |
Eric Auger | 4f5f1dc | 2015-09-25 23:41:15 +0200 | [diff] [blame] | 402 | return ((!!v->arch.irq_lines || kvm_vgic_vcpu_pending_irq(v)) |
Eric Auger | 3b92830 | 2015-09-25 23:41:17 +0200 | [diff] [blame] | 403 | && !v->arch.power_off && !v->arch.pause); |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 404 | } |
| 405 | |
Christoffer Dall | f7ed45b | 2013-01-20 18:47:42 -0500 | [diff] [blame] | 406 | /* Just ensure a guest exit from a particular CPU */ |
| 407 | static void exit_vm_noop(void *info) |
| 408 | { |
| 409 | } |
| 410 | |
| 411 | void force_vm_exit(const cpumask_t *mask) |
| 412 | { |
Eric Auger | 898f949 | 2016-03-07 23:50:36 +0700 | [diff] [blame] | 413 | preempt_disable(); |
Christoffer Dall | f7ed45b | 2013-01-20 18:47:42 -0500 | [diff] [blame] | 414 | smp_call_function_many(mask, exit_vm_noop, NULL, true); |
Eric Auger | 898f949 | 2016-03-07 23:50:36 +0700 | [diff] [blame] | 415 | preempt_enable(); |
Christoffer Dall | f7ed45b | 2013-01-20 18:47:42 -0500 | [diff] [blame] | 416 | } |
| 417 | |
| 418 | /** |
| 419 | * need_new_vmid_gen - check that the VMID is still valid |
Andrea Gelmini | 6a727b0 | 2016-05-21 13:48:35 +0200 | [diff] [blame] | 420 | * @kvm: The VM's VMID to check |
Christoffer Dall | f7ed45b | 2013-01-20 18:47:42 -0500 | [diff] [blame] | 421 | * |
| 422 | * return true if there is a new generation of VMIDs being used |
| 423 | * |
| 424 | * The hardware supports only 256 values with the value zero reserved for the |
| 425 | * host, so we check if an assigned value belongs to a previous generation, |
| 426 | * which which requires us to assign a new value. If we're the first to use a |
| 427 | * VMID for the new generation, we must flush necessary caches and TLBs on all |
| 428 | * CPUs. |
| 429 | */ |
| 430 | static bool need_new_vmid_gen(struct kvm *kvm) |
| 431 | { |
| 432 | return unlikely(kvm->arch.vmid_gen != atomic64_read(&kvm_vmid_gen)); |
| 433 | } |
| 434 | |
| 435 | /** |
| 436 | * update_vttbr - Update the VTTBR with a valid VMID before the guest runs |
| 437 | * @kvm The guest that we are about to run |
| 438 | * |
| 439 | * Called from kvm_arch_vcpu_ioctl_run before entering the guest to ensure the |
| 440 | * VM has a valid VMID, otherwise assigns a new one and flushes corresponding |
| 441 | * caches and TLBs. |
| 442 | */ |
| 443 | static void update_vttbr(struct kvm *kvm) |
| 444 | { |
| 445 | phys_addr_t pgd_phys; |
| 446 | u64 vmid; |
| 447 | |
| 448 | if (!need_new_vmid_gen(kvm)) |
| 449 | return; |
| 450 | |
| 451 | spin_lock(&kvm_vmid_lock); |
| 452 | |
| 453 | /* |
| 454 | * We need to re-check the vmid_gen here to ensure that if another vcpu |
| 455 | * already allocated a valid vmid for this vm, then this vcpu should |
| 456 | * use the same vmid. |
| 457 | */ |
| 458 | if (!need_new_vmid_gen(kvm)) { |
| 459 | spin_unlock(&kvm_vmid_lock); |
| 460 | return; |
| 461 | } |
| 462 | |
| 463 | /* First user of a new VMID generation? */ |
| 464 | if (unlikely(kvm_next_vmid == 0)) { |
| 465 | atomic64_inc(&kvm_vmid_gen); |
| 466 | kvm_next_vmid = 1; |
| 467 | |
| 468 | /* |
| 469 | * On SMP we know no other CPUs can use this CPU's or each |
| 470 | * other's VMID after force_vm_exit returns since the |
| 471 | * kvm_vmid_lock blocks them from reentry to the guest. |
| 472 | */ |
| 473 | force_vm_exit(cpu_all_mask); |
| 474 | /* |
| 475 | * Now broadcast TLB + ICACHE invalidation over the inner |
| 476 | * shareable domain to make sure all data structures are |
| 477 | * clean. |
| 478 | */ |
| 479 | kvm_call_hyp(__kvm_flush_vm_context); |
| 480 | } |
| 481 | |
| 482 | kvm->arch.vmid_gen = atomic64_read(&kvm_vmid_gen); |
| 483 | kvm->arch.vmid = kvm_next_vmid; |
| 484 | kvm_next_vmid++; |
Vladimir Murzin | 20475f7 | 2015-11-16 11:28:18 +0000 | [diff] [blame] | 485 | kvm_next_vmid &= (1 << kvm_vmid_bits) - 1; |
Christoffer Dall | f7ed45b | 2013-01-20 18:47:42 -0500 | [diff] [blame] | 486 | |
| 487 | /* update vttbr to be used with the new vmid */ |
Suzuki K Poulose | 9163ee23 | 2016-03-22 17:01:21 +0000 | [diff] [blame] | 488 | pgd_phys = virt_to_phys(kvm->arch.pgd); |
Joel Schopp | dbff124 | 2014-07-09 11:17:04 -0500 | [diff] [blame] | 489 | BUG_ON(pgd_phys & ~VTTBR_BADDR_MASK); |
Vladimir Murzin | 20475f7 | 2015-11-16 11:28:18 +0000 | [diff] [blame] | 490 | vmid = ((u64)(kvm->arch.vmid) << VTTBR_VMID_SHIFT) & VTTBR_VMID_MASK(kvm_vmid_bits); |
Joel Schopp | dbff124 | 2014-07-09 11:17:04 -0500 | [diff] [blame] | 491 | kvm->arch.vttbr = pgd_phys | vmid; |
Christoffer Dall | f7ed45b | 2013-01-20 18:47:42 -0500 | [diff] [blame] | 492 | |
| 493 | spin_unlock(&kvm_vmid_lock); |
| 494 | } |
| 495 | |
Christoffer Dall | f7ed45b | 2013-01-20 18:47:42 -0500 | [diff] [blame] | 496 | static int kvm_vcpu_first_run_init(struct kvm_vcpu *vcpu) |
| 497 | { |
Christoffer Dall | 0597112 | 2014-12-12 21:19:23 +0100 | [diff] [blame] | 498 | struct kvm *kvm = vcpu->kvm; |
Christoffer Dall | 41a5448 | 2016-05-18 16:26:00 +0100 | [diff] [blame] | 499 | int ret = 0; |
Christoffer Dall | e1ba020 | 2013-09-23 14:55:55 -0700 | [diff] [blame] | 500 | |
Christoffer Dall | f7ed45b | 2013-01-20 18:47:42 -0500 | [diff] [blame] | 501 | if (likely(vcpu->arch.has_run_once)) |
| 502 | return 0; |
| 503 | |
| 504 | vcpu->arch.has_run_once = true; |
Marc Zyngier | aa024c2 | 2013-01-20 18:28:13 -0500 | [diff] [blame] | 505 | |
| 506 | /* |
Peter Maydell | 6d3cfbe | 2014-12-04 15:02:24 +0000 | [diff] [blame] | 507 | * Map the VGIC hardware resources before running a vcpu the first |
| 508 | * time on this VM. |
Marc Zyngier | 01ac5e3 | 2013-01-21 19:36:16 -0500 | [diff] [blame] | 509 | */ |
Pavel Fedin | c2f5851 | 2015-08-05 11:53:57 +0100 | [diff] [blame] | 510 | if (unlikely(irqchip_in_kernel(kvm) && !vgic_ready(kvm))) { |
Christoffer Dall | 0597112 | 2014-12-12 21:19:23 +0100 | [diff] [blame] | 511 | ret = kvm_vgic_map_resources(kvm); |
Marc Zyngier | 01ac5e3 | 2013-01-21 19:36:16 -0500 | [diff] [blame] | 512 | if (ret) |
| 513 | return ret; |
| 514 | } |
| 515 | |
Christoffer Dall | 0597112 | 2014-12-12 21:19:23 +0100 | [diff] [blame] | 516 | /* |
| 517 | * Enable the arch timers only if we have an in-kernel VGIC |
| 518 | * and it has been properly initialized, since we cannot handle |
| 519 | * interrupts from the virtual timer with a userspace gic. |
| 520 | */ |
| 521 | if (irqchip_in_kernel(kvm) && vgic_initialized(kvm)) |
Christoffer Dall | 41a5448 | 2016-05-18 16:26:00 +0100 | [diff] [blame] | 522 | ret = kvm_timer_enable(vcpu); |
Christoffer Dall | 0597112 | 2014-12-12 21:19:23 +0100 | [diff] [blame] | 523 | |
Christoffer Dall | 41a5448 | 2016-05-18 16:26:00 +0100 | [diff] [blame] | 524 | return ret; |
Christoffer Dall | f7ed45b | 2013-01-20 18:47:42 -0500 | [diff] [blame] | 525 | } |
| 526 | |
Eric Auger | c1426e4 | 2015-03-04 11:14:34 +0100 | [diff] [blame] | 527 | bool kvm_arch_intc_initialized(struct kvm *kvm) |
| 528 | { |
| 529 | return vgic_initialized(kvm); |
| 530 | } |
| 531 | |
Christoffer Dall | b13216c | 2016-04-27 10:28:00 +0100 | [diff] [blame] | 532 | void kvm_arm_halt_guest(struct kvm *kvm) |
Eric Auger | 3b92830 | 2015-09-25 23:41:17 +0200 | [diff] [blame] | 533 | { |
| 534 | int i; |
| 535 | struct kvm_vcpu *vcpu; |
| 536 | |
| 537 | kvm_for_each_vcpu(i, vcpu, kvm) |
| 538 | vcpu->arch.pause = true; |
Christoffer Dall | b13216c | 2016-04-27 10:28:00 +0100 | [diff] [blame] | 539 | kvm_make_all_cpus_request(kvm, KVM_REQ_VCPU_EXIT); |
Eric Auger | 3b92830 | 2015-09-25 23:41:17 +0200 | [diff] [blame] | 540 | } |
| 541 | |
Christoffer Dall | 35a2d58 | 2016-05-20 15:25:28 +0200 | [diff] [blame] | 542 | void kvm_arm_halt_vcpu(struct kvm_vcpu *vcpu) |
| 543 | { |
| 544 | vcpu->arch.pause = true; |
| 545 | kvm_vcpu_kick(vcpu); |
| 546 | } |
| 547 | |
| 548 | void kvm_arm_resume_vcpu(struct kvm_vcpu *vcpu) |
Christoffer Dall | b13216c | 2016-04-27 10:28:00 +0100 | [diff] [blame] | 549 | { |
| 550 | struct swait_queue_head *wq = kvm_arch_vcpu_wq(vcpu); |
| 551 | |
| 552 | vcpu->arch.pause = false; |
| 553 | swake_up(wq); |
| 554 | } |
| 555 | |
| 556 | void kvm_arm_resume_guest(struct kvm *kvm) |
Eric Auger | 3b92830 | 2015-09-25 23:41:17 +0200 | [diff] [blame] | 557 | { |
| 558 | int i; |
| 559 | struct kvm_vcpu *vcpu; |
| 560 | |
Christoffer Dall | b13216c | 2016-04-27 10:28:00 +0100 | [diff] [blame] | 561 | kvm_for_each_vcpu(i, vcpu, kvm) |
| 562 | kvm_arm_resume_vcpu(vcpu); |
Eric Auger | 3b92830 | 2015-09-25 23:41:17 +0200 | [diff] [blame] | 563 | } |
| 564 | |
Eric Auger | 3781528 | 2015-09-25 23:41:14 +0200 | [diff] [blame] | 565 | static void vcpu_sleep(struct kvm_vcpu *vcpu) |
Marc Zyngier | aa024c2 | 2013-01-20 18:28:13 -0500 | [diff] [blame] | 566 | { |
Marcelo Tosatti | 8577370 | 2016-02-19 09:46:39 +0100 | [diff] [blame] | 567 | struct swait_queue_head *wq = kvm_arch_vcpu_wq(vcpu); |
Marc Zyngier | aa024c2 | 2013-01-20 18:28:13 -0500 | [diff] [blame] | 568 | |
Marcelo Tosatti | 8577370 | 2016-02-19 09:46:39 +0100 | [diff] [blame] | 569 | swait_event_interruptible(*wq, ((!vcpu->arch.power_off) && |
Eric Auger | 3b92830 | 2015-09-25 23:41:17 +0200 | [diff] [blame] | 570 | (!vcpu->arch.pause))); |
Marc Zyngier | aa024c2 | 2013-01-20 18:28:13 -0500 | [diff] [blame] | 571 | } |
| 572 | |
Andre Przywara | e8180dc | 2013-05-09 00:28:06 +0200 | [diff] [blame] | 573 | static int kvm_vcpu_initialized(struct kvm_vcpu *vcpu) |
| 574 | { |
| 575 | return vcpu->arch.target >= 0; |
| 576 | } |
| 577 | |
Christoffer Dall | f7ed45b | 2013-01-20 18:47:42 -0500 | [diff] [blame] | 578 | /** |
| 579 | * kvm_arch_vcpu_ioctl_run - the main VCPU run function to execute guest code |
| 580 | * @vcpu: The VCPU pointer |
| 581 | * @run: The kvm_run structure pointer used for userspace state exchange |
| 582 | * |
| 583 | * This function is called through the VCPU_RUN ioctl called from user space. It |
| 584 | * will execute VM code in a loop until the time slice for the process is used |
| 585 | * or some emulation is needed from user space in which case the function will |
| 586 | * return with return value 0 and with the kvm_run structure filled in with the |
| 587 | * required data for the requested emulation. |
| 588 | */ |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 589 | int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run) |
| 590 | { |
Christoffer Dall | f7ed45b | 2013-01-20 18:47:42 -0500 | [diff] [blame] | 591 | int ret; |
| 592 | sigset_t sigsaved; |
| 593 | |
Andre Przywara | e8180dc | 2013-05-09 00:28:06 +0200 | [diff] [blame] | 594 | if (unlikely(!kvm_vcpu_initialized(vcpu))) |
Christoffer Dall | f7ed45b | 2013-01-20 18:47:42 -0500 | [diff] [blame] | 595 | return -ENOEXEC; |
| 596 | |
| 597 | ret = kvm_vcpu_first_run_init(vcpu); |
| 598 | if (ret) |
| 599 | return ret; |
| 600 | |
Christoffer Dall | 45e96ea | 2013-01-20 18:43:58 -0500 | [diff] [blame] | 601 | if (run->exit_reason == KVM_EXIT_MMIO) { |
| 602 | ret = kvm_handle_mmio_return(vcpu, vcpu->run); |
| 603 | if (ret) |
| 604 | return ret; |
| 605 | } |
| 606 | |
Christoffer Dall | f7ed45b | 2013-01-20 18:47:42 -0500 | [diff] [blame] | 607 | if (vcpu->sigset_active) |
| 608 | sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved); |
| 609 | |
| 610 | ret = 1; |
| 611 | run->exit_reason = KVM_EXIT_UNKNOWN; |
| 612 | while (ret > 0) { |
| 613 | /* |
| 614 | * Check conditions before entering the guest |
| 615 | */ |
| 616 | cond_resched(); |
| 617 | |
| 618 | update_vttbr(vcpu->kvm); |
| 619 | |
Eric Auger | 3b92830 | 2015-09-25 23:41:17 +0200 | [diff] [blame] | 620 | if (vcpu->arch.power_off || vcpu->arch.pause) |
Eric Auger | 3781528 | 2015-09-25 23:41:14 +0200 | [diff] [blame] | 621 | vcpu_sleep(vcpu); |
Marc Zyngier | aa024c2 | 2013-01-20 18:28:13 -0500 | [diff] [blame] | 622 | |
Marc Zyngier | abdf584 | 2015-06-08 15:00:28 +0100 | [diff] [blame] | 623 | /* |
Marc Zyngier | abdf584 | 2015-06-08 15:00:28 +0100 | [diff] [blame] | 624 | * Preparing the interrupts to be injected also |
| 625 | * involves poking the GIC, which must be done in a |
| 626 | * non-preemptible context. |
| 627 | */ |
| 628 | preempt_disable(); |
Shannon Zhao | b02386e | 2016-02-26 19:29:19 +0800 | [diff] [blame] | 629 | kvm_pmu_flush_hwstate(vcpu); |
Christoffer Dall | 7e16aa8 | 2015-11-24 10:31:07 +0100 | [diff] [blame] | 630 | kvm_timer_flush_hwstate(vcpu); |
Marc Zyngier | 9a99d05 | 2015-06-05 09:33:28 +0100 | [diff] [blame] | 631 | kvm_vgic_flush_hwstate(vcpu); |
Marc Zyngier | 1a89dd9 | 2013-01-21 19:36:12 -0500 | [diff] [blame] | 632 | |
Christoffer Dall | f7ed45b | 2013-01-20 18:47:42 -0500 | [diff] [blame] | 633 | local_irq_disable(); |
| 634 | |
| 635 | /* |
| 636 | * Re-check atomic conditions |
| 637 | */ |
| 638 | if (signal_pending(current)) { |
| 639 | ret = -EINTR; |
| 640 | run->exit_reason = KVM_EXIT_INTR; |
| 641 | } |
| 642 | |
Eric Auger | 101d3da | 2015-09-25 23:41:16 +0200 | [diff] [blame] | 643 | if (ret <= 0 || need_new_vmid_gen(vcpu->kvm) || |
Eric Auger | 3b92830 | 2015-09-25 23:41:17 +0200 | [diff] [blame] | 644 | vcpu->arch.power_off || vcpu->arch.pause) { |
Christoffer Dall | f7ed45b | 2013-01-20 18:47:42 -0500 | [diff] [blame] | 645 | local_irq_enable(); |
Shannon Zhao | b02386e | 2016-02-26 19:29:19 +0800 | [diff] [blame] | 646 | kvm_pmu_sync_hwstate(vcpu); |
Christoffer Dall | 4b4b451 | 2015-08-30 15:01:27 +0200 | [diff] [blame] | 647 | kvm_timer_sync_hwstate(vcpu); |
Marc Zyngier | 1a89dd9 | 2013-01-21 19:36:12 -0500 | [diff] [blame] | 648 | kvm_vgic_sync_hwstate(vcpu); |
Marc Zyngier | abdf584 | 2015-06-08 15:00:28 +0100 | [diff] [blame] | 649 | preempt_enable(); |
Christoffer Dall | f7ed45b | 2013-01-20 18:47:42 -0500 | [diff] [blame] | 650 | continue; |
| 651 | } |
| 652 | |
Alex Bennée | 56c7f5e | 2015-07-07 17:29:56 +0100 | [diff] [blame] | 653 | kvm_arm_setup_debug(vcpu); |
| 654 | |
Christoffer Dall | f7ed45b | 2013-01-20 18:47:42 -0500 | [diff] [blame] | 655 | /************************************************************** |
| 656 | * Enter the guest |
| 657 | */ |
| 658 | trace_kvm_entry(*vcpu_pc(vcpu)); |
Paolo Bonzini | 6edaa53 | 2016-06-15 15:18:26 +0200 | [diff] [blame] | 659 | guest_enter_irqoff(); |
Christoffer Dall | f7ed45b | 2013-01-20 18:47:42 -0500 | [diff] [blame] | 660 | vcpu->mode = IN_GUEST_MODE; |
| 661 | |
| 662 | ret = kvm_call_hyp(__kvm_vcpu_run, vcpu); |
| 663 | |
| 664 | vcpu->mode = OUTSIDE_GUEST_MODE; |
Amit Tomar | b19e689 | 2015-11-26 10:09:43 +0000 | [diff] [blame] | 665 | vcpu->stat.exits++; |
Christoffer Dall | 1b3d546 | 2015-05-28 19:49:10 +0100 | [diff] [blame] | 666 | /* |
| 667 | * Back from guest |
| 668 | *************************************************************/ |
| 669 | |
Alex Bennée | 56c7f5e | 2015-07-07 17:29:56 +0100 | [diff] [blame] | 670 | kvm_arm_clear_debug(vcpu); |
| 671 | |
Christoffer Dall | f7ed45b | 2013-01-20 18:47:42 -0500 | [diff] [blame] | 672 | /* |
| 673 | * We may have taken a host interrupt in HYP mode (ie |
| 674 | * while executing the guest). This interrupt is still |
| 675 | * pending, as we haven't serviced it yet! |
| 676 | * |
| 677 | * We're now back in SVC mode, with interrupts |
| 678 | * disabled. Enabling the interrupts now will have |
| 679 | * the effect of taking the interrupt again, in SVC |
| 680 | * mode this time. |
| 681 | */ |
| 682 | local_irq_enable(); |
| 683 | |
| 684 | /* |
Paolo Bonzini | 6edaa53 | 2016-06-15 15:18:26 +0200 | [diff] [blame] | 685 | * We do local_irq_enable() before calling guest_exit() so |
Christoffer Dall | 1b3d546 | 2015-05-28 19:49:10 +0100 | [diff] [blame] | 686 | * that if a timer interrupt hits while running the guest we |
| 687 | * account that tick as being spent in the guest. We enable |
Paolo Bonzini | 6edaa53 | 2016-06-15 15:18:26 +0200 | [diff] [blame] | 688 | * preemption after calling guest_exit() so that if we get |
Christoffer Dall | 1b3d546 | 2015-05-28 19:49:10 +0100 | [diff] [blame] | 689 | * preempted we make sure ticks after that is not counted as |
| 690 | * guest time. |
| 691 | */ |
Paolo Bonzini | 6edaa53 | 2016-06-15 15:18:26 +0200 | [diff] [blame] | 692 | guest_exit(); |
Christoffer Dall | b5905dc | 2015-08-30 15:55:22 +0200 | [diff] [blame] | 693 | trace_kvm_exit(ret, kvm_vcpu_trap_get_class(vcpu), *vcpu_pc(vcpu)); |
Christoffer Dall | 1b3d546 | 2015-05-28 19:49:10 +0100 | [diff] [blame] | 694 | |
Christoffer Dall | 4b4b451 | 2015-08-30 15:01:27 +0200 | [diff] [blame] | 695 | /* |
Shannon Zhao | b02386e | 2016-02-26 19:29:19 +0800 | [diff] [blame] | 696 | * We must sync the PMU and timer state before the vgic state so |
| 697 | * that the vgic can properly sample the updated state of the |
Christoffer Dall | 4b4b451 | 2015-08-30 15:01:27 +0200 | [diff] [blame] | 698 | * interrupt line. |
| 699 | */ |
Shannon Zhao | b02386e | 2016-02-26 19:29:19 +0800 | [diff] [blame] | 700 | kvm_pmu_sync_hwstate(vcpu); |
Christoffer Dall | 4b4b451 | 2015-08-30 15:01:27 +0200 | [diff] [blame] | 701 | kvm_timer_sync_hwstate(vcpu); |
| 702 | |
Marc Zyngier | 1a89dd9 | 2013-01-21 19:36:12 -0500 | [diff] [blame] | 703 | kvm_vgic_sync_hwstate(vcpu); |
Marc Zyngier | abdf584 | 2015-06-08 15:00:28 +0100 | [diff] [blame] | 704 | |
| 705 | preempt_enable(); |
| 706 | |
Christoffer Dall | f7ed45b | 2013-01-20 18:47:42 -0500 | [diff] [blame] | 707 | ret = handle_exit(vcpu, run, ret); |
| 708 | } |
| 709 | |
| 710 | if (vcpu->sigset_active) |
| 711 | sigprocmask(SIG_SETMASK, &sigsaved, NULL); |
| 712 | return ret; |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 713 | } |
| 714 | |
Christoffer Dall | 86ce853 | 2013-01-20 18:28:08 -0500 | [diff] [blame] | 715 | static int vcpu_interrupt_line(struct kvm_vcpu *vcpu, int number, bool level) |
| 716 | { |
| 717 | int bit_index; |
| 718 | bool set; |
| 719 | unsigned long *ptr; |
| 720 | |
| 721 | if (number == KVM_ARM_IRQ_CPU_IRQ) |
| 722 | bit_index = __ffs(HCR_VI); |
| 723 | else /* KVM_ARM_IRQ_CPU_FIQ */ |
| 724 | bit_index = __ffs(HCR_VF); |
| 725 | |
| 726 | ptr = (unsigned long *)&vcpu->arch.irq_lines; |
| 727 | if (level) |
| 728 | set = test_and_set_bit(bit_index, ptr); |
| 729 | else |
| 730 | set = test_and_clear_bit(bit_index, ptr); |
| 731 | |
| 732 | /* |
| 733 | * If we didn't change anything, no need to wake up or kick other CPUs |
| 734 | */ |
| 735 | if (set == level) |
| 736 | return 0; |
| 737 | |
| 738 | /* |
| 739 | * The vcpu irq_lines field was updated, wake up sleeping VCPUs and |
| 740 | * trigger a world-switch round on the running physical CPU to set the |
| 741 | * virtual IRQ/FIQ fields in the HCR appropriately. |
| 742 | */ |
| 743 | kvm_vcpu_kick(vcpu); |
| 744 | |
| 745 | return 0; |
| 746 | } |
| 747 | |
Alexander Graf | 79558f1 | 2013-04-16 19:21:41 +0200 | [diff] [blame] | 748 | int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_level, |
| 749 | bool line_status) |
Christoffer Dall | 86ce853 | 2013-01-20 18:28:08 -0500 | [diff] [blame] | 750 | { |
| 751 | u32 irq = irq_level->irq; |
| 752 | unsigned int irq_type, vcpu_idx, irq_num; |
| 753 | int nrcpus = atomic_read(&kvm->online_vcpus); |
| 754 | struct kvm_vcpu *vcpu = NULL; |
| 755 | bool level = irq_level->level; |
| 756 | |
| 757 | irq_type = (irq >> KVM_ARM_IRQ_TYPE_SHIFT) & KVM_ARM_IRQ_TYPE_MASK; |
| 758 | vcpu_idx = (irq >> KVM_ARM_IRQ_VCPU_SHIFT) & KVM_ARM_IRQ_VCPU_MASK; |
| 759 | irq_num = (irq >> KVM_ARM_IRQ_NUM_SHIFT) & KVM_ARM_IRQ_NUM_MASK; |
| 760 | |
| 761 | trace_kvm_irq_line(irq_type, vcpu_idx, irq_num, irq_level->level); |
| 762 | |
Marc Zyngier | 5863c2c | 2013-01-21 19:36:15 -0500 | [diff] [blame] | 763 | switch (irq_type) { |
| 764 | case KVM_ARM_IRQ_TYPE_CPU: |
| 765 | if (irqchip_in_kernel(kvm)) |
| 766 | return -ENXIO; |
Christoffer Dall | 86ce853 | 2013-01-20 18:28:08 -0500 | [diff] [blame] | 767 | |
Marc Zyngier | 5863c2c | 2013-01-21 19:36:15 -0500 | [diff] [blame] | 768 | if (vcpu_idx >= nrcpus) |
| 769 | return -EINVAL; |
Christoffer Dall | 86ce853 | 2013-01-20 18:28:08 -0500 | [diff] [blame] | 770 | |
Marc Zyngier | 5863c2c | 2013-01-21 19:36:15 -0500 | [diff] [blame] | 771 | vcpu = kvm_get_vcpu(kvm, vcpu_idx); |
| 772 | if (!vcpu) |
| 773 | return -EINVAL; |
Christoffer Dall | 86ce853 | 2013-01-20 18:28:08 -0500 | [diff] [blame] | 774 | |
Marc Zyngier | 5863c2c | 2013-01-21 19:36:15 -0500 | [diff] [blame] | 775 | if (irq_num > KVM_ARM_IRQ_CPU_FIQ) |
| 776 | return -EINVAL; |
Christoffer Dall | 86ce853 | 2013-01-20 18:28:08 -0500 | [diff] [blame] | 777 | |
Marc Zyngier | 5863c2c | 2013-01-21 19:36:15 -0500 | [diff] [blame] | 778 | return vcpu_interrupt_line(vcpu, irq_num, level); |
| 779 | case KVM_ARM_IRQ_TYPE_PPI: |
| 780 | if (!irqchip_in_kernel(kvm)) |
| 781 | return -ENXIO; |
| 782 | |
| 783 | if (vcpu_idx >= nrcpus) |
| 784 | return -EINVAL; |
| 785 | |
| 786 | vcpu = kvm_get_vcpu(kvm, vcpu_idx); |
| 787 | if (!vcpu) |
| 788 | return -EINVAL; |
| 789 | |
| 790 | if (irq_num < VGIC_NR_SGIS || irq_num >= VGIC_NR_PRIVATE_IRQS) |
| 791 | return -EINVAL; |
| 792 | |
| 793 | return kvm_vgic_inject_irq(kvm, vcpu->vcpu_id, irq_num, level); |
| 794 | case KVM_ARM_IRQ_TYPE_SPI: |
| 795 | if (!irqchip_in_kernel(kvm)) |
| 796 | return -ENXIO; |
| 797 | |
Andre Przywara | fd1d0dd | 2015-04-10 16:17:59 +0100 | [diff] [blame] | 798 | if (irq_num < VGIC_NR_PRIVATE_IRQS) |
Marc Zyngier | 5863c2c | 2013-01-21 19:36:15 -0500 | [diff] [blame] | 799 | return -EINVAL; |
| 800 | |
| 801 | return kvm_vgic_inject_irq(kvm, 0, irq_num, level); |
| 802 | } |
| 803 | |
| 804 | return -EINVAL; |
Christoffer Dall | 86ce853 | 2013-01-20 18:28:08 -0500 | [diff] [blame] | 805 | } |
| 806 | |
Christoffer Dall | f7fa034d | 2014-10-16 16:40:53 +0200 | [diff] [blame] | 807 | static int kvm_vcpu_set_target(struct kvm_vcpu *vcpu, |
| 808 | const struct kvm_vcpu_init *init) |
| 809 | { |
| 810 | unsigned int i; |
| 811 | int phys_target = kvm_target_cpu(); |
| 812 | |
| 813 | if (init->target != phys_target) |
| 814 | return -EINVAL; |
| 815 | |
| 816 | /* |
| 817 | * Secondary and subsequent calls to KVM_ARM_VCPU_INIT must |
| 818 | * use the same target. |
| 819 | */ |
| 820 | if (vcpu->arch.target != -1 && vcpu->arch.target != init->target) |
| 821 | return -EINVAL; |
| 822 | |
| 823 | /* -ENOENT for unknown features, -EINVAL for invalid combinations. */ |
| 824 | for (i = 0; i < sizeof(init->features) * 8; i++) { |
| 825 | bool set = (init->features[i / 32] & (1 << (i % 32))); |
| 826 | |
| 827 | if (set && i >= KVM_VCPU_MAX_FEATURES) |
| 828 | return -ENOENT; |
| 829 | |
| 830 | /* |
| 831 | * Secondary and subsequent calls to KVM_ARM_VCPU_INIT must |
| 832 | * use the same feature set. |
| 833 | */ |
| 834 | if (vcpu->arch.target != -1 && i < KVM_VCPU_MAX_FEATURES && |
| 835 | test_bit(i, vcpu->arch.features) != set) |
| 836 | return -EINVAL; |
| 837 | |
| 838 | if (set) |
| 839 | set_bit(i, vcpu->arch.features); |
| 840 | } |
| 841 | |
| 842 | vcpu->arch.target = phys_target; |
| 843 | |
| 844 | /* Now we know what it is, we can reset it. */ |
| 845 | return kvm_reset_vcpu(vcpu); |
| 846 | } |
| 847 | |
| 848 | |
Christoffer Dall | 478a823 | 2013-11-19 17:43:19 -0800 | [diff] [blame] | 849 | static int kvm_arch_vcpu_ioctl_vcpu_init(struct kvm_vcpu *vcpu, |
| 850 | struct kvm_vcpu_init *init) |
| 851 | { |
| 852 | int ret; |
| 853 | |
| 854 | ret = kvm_vcpu_set_target(vcpu, init); |
| 855 | if (ret) |
| 856 | return ret; |
| 857 | |
Christoffer Dall | 957db10 | 2014-11-27 10:35:03 +0100 | [diff] [blame] | 858 | /* |
| 859 | * Ensure a rebooted VM will fault in RAM pages and detect if the |
| 860 | * guest MMU is turned off and flush the caches as needed. |
| 861 | */ |
| 862 | if (vcpu->arch.has_run_once) |
| 863 | stage2_unmap_vm(vcpu->kvm); |
| 864 | |
Christoffer Dall | b856a59 | 2014-10-16 17:21:16 +0200 | [diff] [blame] | 865 | vcpu_reset_hcr(vcpu); |
| 866 | |
Christoffer Dall | 478a823 | 2013-11-19 17:43:19 -0800 | [diff] [blame] | 867 | /* |
Eric Auger | 3781528 | 2015-09-25 23:41:14 +0200 | [diff] [blame] | 868 | * Handle the "start in power-off" case. |
Christoffer Dall | 478a823 | 2013-11-19 17:43:19 -0800 | [diff] [blame] | 869 | */ |
Christoffer Dall | 03f1d4c | 2014-12-02 15:27:51 +0100 | [diff] [blame] | 870 | if (test_bit(KVM_ARM_VCPU_POWER_OFF, vcpu->arch.features)) |
Eric Auger | 3781528 | 2015-09-25 23:41:14 +0200 | [diff] [blame] | 871 | vcpu->arch.power_off = true; |
Christoffer Dall | 3ad8b3d | 2014-10-16 16:14:43 +0200 | [diff] [blame] | 872 | else |
Eric Auger | 3781528 | 2015-09-25 23:41:14 +0200 | [diff] [blame] | 873 | vcpu->arch.power_off = false; |
Christoffer Dall | 478a823 | 2013-11-19 17:43:19 -0800 | [diff] [blame] | 874 | |
| 875 | return 0; |
| 876 | } |
| 877 | |
Shannon Zhao | f577f6c | 2016-01-11 20:56:17 +0800 | [diff] [blame] | 878 | static int kvm_arm_vcpu_set_attr(struct kvm_vcpu *vcpu, |
| 879 | struct kvm_device_attr *attr) |
| 880 | { |
| 881 | int ret = -ENXIO; |
| 882 | |
| 883 | switch (attr->group) { |
| 884 | default: |
Shannon Zhao | bb0c70b | 2016-01-11 21:35:32 +0800 | [diff] [blame] | 885 | ret = kvm_arm_vcpu_arch_set_attr(vcpu, attr); |
Shannon Zhao | f577f6c | 2016-01-11 20:56:17 +0800 | [diff] [blame] | 886 | break; |
| 887 | } |
| 888 | |
| 889 | return ret; |
| 890 | } |
| 891 | |
| 892 | static int kvm_arm_vcpu_get_attr(struct kvm_vcpu *vcpu, |
| 893 | struct kvm_device_attr *attr) |
| 894 | { |
| 895 | int ret = -ENXIO; |
| 896 | |
| 897 | switch (attr->group) { |
| 898 | default: |
Shannon Zhao | bb0c70b | 2016-01-11 21:35:32 +0800 | [diff] [blame] | 899 | ret = kvm_arm_vcpu_arch_get_attr(vcpu, attr); |
Shannon Zhao | f577f6c | 2016-01-11 20:56:17 +0800 | [diff] [blame] | 900 | break; |
| 901 | } |
| 902 | |
| 903 | return ret; |
| 904 | } |
| 905 | |
| 906 | static int kvm_arm_vcpu_has_attr(struct kvm_vcpu *vcpu, |
| 907 | struct kvm_device_attr *attr) |
| 908 | { |
| 909 | int ret = -ENXIO; |
| 910 | |
| 911 | switch (attr->group) { |
| 912 | default: |
Shannon Zhao | bb0c70b | 2016-01-11 21:35:32 +0800 | [diff] [blame] | 913 | ret = kvm_arm_vcpu_arch_has_attr(vcpu, attr); |
Shannon Zhao | f577f6c | 2016-01-11 20:56:17 +0800 | [diff] [blame] | 914 | break; |
| 915 | } |
| 916 | |
| 917 | return ret; |
| 918 | } |
| 919 | |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 920 | long kvm_arch_vcpu_ioctl(struct file *filp, |
| 921 | unsigned int ioctl, unsigned long arg) |
| 922 | { |
| 923 | struct kvm_vcpu *vcpu = filp->private_data; |
| 924 | void __user *argp = (void __user *)arg; |
Shannon Zhao | f577f6c | 2016-01-11 20:56:17 +0800 | [diff] [blame] | 925 | struct kvm_device_attr attr; |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 926 | |
| 927 | switch (ioctl) { |
| 928 | case KVM_ARM_VCPU_INIT: { |
| 929 | struct kvm_vcpu_init init; |
| 930 | |
| 931 | if (copy_from_user(&init, argp, sizeof(init))) |
| 932 | return -EFAULT; |
| 933 | |
Christoffer Dall | 478a823 | 2013-11-19 17:43:19 -0800 | [diff] [blame] | 934 | return kvm_arch_vcpu_ioctl_vcpu_init(vcpu, &init); |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 935 | } |
| 936 | case KVM_SET_ONE_REG: |
| 937 | case KVM_GET_ONE_REG: { |
| 938 | struct kvm_one_reg reg; |
Andre Przywara | e8180dc | 2013-05-09 00:28:06 +0200 | [diff] [blame] | 939 | |
| 940 | if (unlikely(!kvm_vcpu_initialized(vcpu))) |
| 941 | return -ENOEXEC; |
| 942 | |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 943 | if (copy_from_user(®, argp, sizeof(reg))) |
| 944 | return -EFAULT; |
| 945 | if (ioctl == KVM_SET_ONE_REG) |
| 946 | return kvm_arm_set_reg(vcpu, ®); |
| 947 | else |
| 948 | return kvm_arm_get_reg(vcpu, ®); |
| 949 | } |
| 950 | case KVM_GET_REG_LIST: { |
| 951 | struct kvm_reg_list __user *user_list = argp; |
| 952 | struct kvm_reg_list reg_list; |
| 953 | unsigned n; |
| 954 | |
Andre Przywara | e8180dc | 2013-05-09 00:28:06 +0200 | [diff] [blame] | 955 | if (unlikely(!kvm_vcpu_initialized(vcpu))) |
| 956 | return -ENOEXEC; |
| 957 | |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 958 | if (copy_from_user(®_list, user_list, sizeof(reg_list))) |
| 959 | return -EFAULT; |
| 960 | n = reg_list.n; |
| 961 | reg_list.n = kvm_arm_num_regs(vcpu); |
| 962 | if (copy_to_user(user_list, ®_list, sizeof(reg_list))) |
| 963 | return -EFAULT; |
| 964 | if (n < reg_list.n) |
| 965 | return -E2BIG; |
| 966 | return kvm_arm_copy_reg_indices(vcpu, user_list->reg); |
| 967 | } |
Shannon Zhao | f577f6c | 2016-01-11 20:56:17 +0800 | [diff] [blame] | 968 | case KVM_SET_DEVICE_ATTR: { |
| 969 | if (copy_from_user(&attr, argp, sizeof(attr))) |
| 970 | return -EFAULT; |
| 971 | return kvm_arm_vcpu_set_attr(vcpu, &attr); |
| 972 | } |
| 973 | case KVM_GET_DEVICE_ATTR: { |
| 974 | if (copy_from_user(&attr, argp, sizeof(attr))) |
| 975 | return -EFAULT; |
| 976 | return kvm_arm_vcpu_get_attr(vcpu, &attr); |
| 977 | } |
| 978 | case KVM_HAS_DEVICE_ATTR: { |
| 979 | if (copy_from_user(&attr, argp, sizeof(attr))) |
| 980 | return -EFAULT; |
| 981 | return kvm_arm_vcpu_has_attr(vcpu, &attr); |
| 982 | } |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 983 | default: |
| 984 | return -EINVAL; |
| 985 | } |
| 986 | } |
| 987 | |
Mario Smarduch | 53c810c | 2015-01-15 15:58:57 -0800 | [diff] [blame] | 988 | /** |
| 989 | * kvm_vm_ioctl_get_dirty_log - get and clear the log of dirty pages in a slot |
| 990 | * @kvm: kvm instance |
| 991 | * @log: slot id and address to which we copy the log |
| 992 | * |
| 993 | * Steps 1-4 below provide general overview of dirty page logging. See |
| 994 | * kvm_get_dirty_log_protect() function description for additional details. |
| 995 | * |
| 996 | * We call kvm_get_dirty_log_protect() to handle steps 1-3, upon return we |
| 997 | * always flush the TLB (step 4) even if previous step failed and the dirty |
| 998 | * bitmap may be corrupt. Regardless of previous outcome the KVM logging API |
| 999 | * does not preclude user space subsequent dirty log read. Flushing TLB ensures |
| 1000 | * writes will be marked dirty for next log read. |
| 1001 | * |
| 1002 | * 1. Take a snapshot of the bit and clear it if needed. |
| 1003 | * 2. Write protect the corresponding page. |
| 1004 | * 3. Copy the snapshot to the userspace. |
| 1005 | * 4. Flush TLB's if needed. |
| 1006 | */ |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1007 | int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log) |
| 1008 | { |
Mario Smarduch | 53c810c | 2015-01-15 15:58:57 -0800 | [diff] [blame] | 1009 | bool is_dirty = false; |
| 1010 | int r; |
| 1011 | |
| 1012 | mutex_lock(&kvm->slots_lock); |
| 1013 | |
| 1014 | r = kvm_get_dirty_log_protect(kvm, log, &is_dirty); |
| 1015 | |
| 1016 | if (is_dirty) |
| 1017 | kvm_flush_remote_tlbs(kvm); |
| 1018 | |
| 1019 | mutex_unlock(&kvm->slots_lock); |
| 1020 | return r; |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1021 | } |
| 1022 | |
Christoffer Dall | 3401d546 | 2013-01-23 13:18:04 -0500 | [diff] [blame] | 1023 | static int kvm_vm_ioctl_set_device_addr(struct kvm *kvm, |
| 1024 | struct kvm_arm_device_addr *dev_addr) |
| 1025 | { |
Christoffer Dall | 330690c | 2013-01-21 19:36:13 -0500 | [diff] [blame] | 1026 | unsigned long dev_id, type; |
| 1027 | |
| 1028 | dev_id = (dev_addr->id & KVM_ARM_DEVICE_ID_MASK) >> |
| 1029 | KVM_ARM_DEVICE_ID_SHIFT; |
| 1030 | type = (dev_addr->id & KVM_ARM_DEVICE_TYPE_MASK) >> |
| 1031 | KVM_ARM_DEVICE_TYPE_SHIFT; |
| 1032 | |
| 1033 | switch (dev_id) { |
| 1034 | case KVM_ARM_DEVICE_VGIC_V2: |
Pavel Fedin | c7da6fa | 2015-12-18 14:38:43 +0300 | [diff] [blame] | 1035 | if (!vgic_present) |
| 1036 | return -ENXIO; |
Christoffer Dall | ce01e4e | 2013-09-23 14:55:56 -0700 | [diff] [blame] | 1037 | return kvm_vgic_addr(kvm, type, &dev_addr->addr, true); |
Christoffer Dall | 330690c | 2013-01-21 19:36:13 -0500 | [diff] [blame] | 1038 | default: |
| 1039 | return -ENODEV; |
| 1040 | } |
Christoffer Dall | 3401d546 | 2013-01-23 13:18:04 -0500 | [diff] [blame] | 1041 | } |
| 1042 | |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1043 | long kvm_arch_vm_ioctl(struct file *filp, |
| 1044 | unsigned int ioctl, unsigned long arg) |
| 1045 | { |
Christoffer Dall | 3401d546 | 2013-01-23 13:18:04 -0500 | [diff] [blame] | 1046 | struct kvm *kvm = filp->private_data; |
| 1047 | void __user *argp = (void __user *)arg; |
| 1048 | |
| 1049 | switch (ioctl) { |
Marc Zyngier | 5863c2c | 2013-01-21 19:36:15 -0500 | [diff] [blame] | 1050 | case KVM_CREATE_IRQCHIP: { |
Christoffer Dall | a28ebea | 2016-08-09 19:13:01 +0200 | [diff] [blame] | 1051 | int ret; |
Pavel Fedin | c7da6fa | 2015-12-18 14:38:43 +0300 | [diff] [blame] | 1052 | if (!vgic_present) |
| 1053 | return -ENXIO; |
Christoffer Dall | a28ebea | 2016-08-09 19:13:01 +0200 | [diff] [blame] | 1054 | mutex_lock(&kvm->lock); |
| 1055 | ret = kvm_vgic_create(kvm, KVM_DEV_TYPE_ARM_VGIC_V2); |
| 1056 | mutex_unlock(&kvm->lock); |
| 1057 | return ret; |
Marc Zyngier | 5863c2c | 2013-01-21 19:36:15 -0500 | [diff] [blame] | 1058 | } |
Christoffer Dall | 3401d546 | 2013-01-23 13:18:04 -0500 | [diff] [blame] | 1059 | case KVM_ARM_SET_DEVICE_ADDR: { |
| 1060 | struct kvm_arm_device_addr dev_addr; |
| 1061 | |
| 1062 | if (copy_from_user(&dev_addr, argp, sizeof(dev_addr))) |
| 1063 | return -EFAULT; |
| 1064 | return kvm_vm_ioctl_set_device_addr(kvm, &dev_addr); |
| 1065 | } |
Anup Patel | 42c4e0c | 2013-09-30 14:20:07 +0530 | [diff] [blame] | 1066 | case KVM_ARM_PREFERRED_TARGET: { |
| 1067 | int err; |
| 1068 | struct kvm_vcpu_init init; |
| 1069 | |
| 1070 | err = kvm_vcpu_preferred_target(&init); |
| 1071 | if (err) |
| 1072 | return err; |
| 1073 | |
| 1074 | if (copy_to_user(argp, &init, sizeof(init))) |
| 1075 | return -EFAULT; |
| 1076 | |
| 1077 | return 0; |
| 1078 | } |
Christoffer Dall | 3401d546 | 2013-01-23 13:18:04 -0500 | [diff] [blame] | 1079 | default: |
| 1080 | return -EINVAL; |
| 1081 | } |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1082 | } |
| 1083 | |
Marc Zyngier | d157f4a | 2013-04-12 19:12:07 +0100 | [diff] [blame] | 1084 | static void cpu_init_hyp_mode(void *dummy) |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1085 | { |
Marc Zyngier | dac288f | 2013-05-14 12:11:37 +0100 | [diff] [blame] | 1086 | phys_addr_t pgd_ptr; |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1087 | unsigned long hyp_stack_ptr; |
| 1088 | unsigned long stack_page; |
| 1089 | unsigned long vector_ptr; |
| 1090 | |
| 1091 | /* Switch from the HYP stub to our own HYP init vector */ |
Marc Zyngier | 5a677ce | 2013-04-12 19:12:06 +0100 | [diff] [blame] | 1092 | __hyp_set_vectors(kvm_get_idmap_vector()); |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1093 | |
Marc Zyngier | dac288f | 2013-05-14 12:11:37 +0100 | [diff] [blame] | 1094 | pgd_ptr = kvm_mmu_get_httbr(); |
Christoph Lameter | 1436c1a | 2013-10-21 13:17:08 +0100 | [diff] [blame] | 1095 | stack_page = __this_cpu_read(kvm_arm_hyp_stack_page); |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1096 | hyp_stack_ptr = stack_page + PAGE_SIZE; |
Ard Biesheuvel | a0bf977 | 2016-02-16 13:52:39 +0100 | [diff] [blame] | 1097 | vector_ptr = (unsigned long)kvm_ksym_ref(__kvm_hyp_vector); |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1098 | |
Marc Zyngier | 12fda81 | 2016-06-30 18:40:45 +0100 | [diff] [blame] | 1099 | __cpu_init_hyp_mode(pgd_ptr, hyp_stack_ptr, vector_ptr); |
Marc Zyngier | 35a2491 | 2016-02-01 17:54:35 +0000 | [diff] [blame] | 1100 | __cpu_init_stage2(); |
Alex Bennée | 56c7f5e | 2015-07-07 17:29:56 +0100 | [diff] [blame] | 1101 | |
Jintack Lim | 488f94d | 2016-12-01 14:32:05 -0500 | [diff] [blame] | 1102 | if (is_kernel_in_hyp_mode()) |
| 1103 | kvm_timer_init_vhe(); |
| 1104 | |
Alex Bennée | 56c7f5e | 2015-07-07 17:29:56 +0100 | [diff] [blame] | 1105 | kvm_arm_init_debug(); |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1106 | } |
| 1107 | |
James Morse | 5f5560b | 2016-03-30 18:33:04 +0100 | [diff] [blame] | 1108 | static void cpu_hyp_reinit(void) |
| 1109 | { |
| 1110 | if (is_kernel_in_hyp_mode()) { |
| 1111 | /* |
AKASHI Takahiro | 67f6919 | 2016-04-27 17:47:05 +0100 | [diff] [blame] | 1112 | * __cpu_init_stage2() is safe to call even if the PM |
James Morse | 5f5560b | 2016-03-30 18:33:04 +0100 | [diff] [blame] | 1113 | * event was cancelled before the CPU was reset. |
| 1114 | */ |
AKASHI Takahiro | 67f6919 | 2016-04-27 17:47:05 +0100 | [diff] [blame] | 1115 | __cpu_init_stage2(); |
James Morse | 5f5560b | 2016-03-30 18:33:04 +0100 | [diff] [blame] | 1116 | } else { |
| 1117 | if (__hyp_get_vectors() == hyp_default_vectors) |
| 1118 | cpu_init_hyp_mode(NULL); |
| 1119 | } |
| 1120 | } |
| 1121 | |
AKASHI Takahiro | 67f6919 | 2016-04-27 17:47:05 +0100 | [diff] [blame] | 1122 | static void cpu_hyp_reset(void) |
Marc Zyngier | d157f4a | 2013-04-12 19:12:07 +0100 | [diff] [blame] | 1123 | { |
Marc Zyngier | 12fda81 | 2016-06-30 18:40:45 +0100 | [diff] [blame] | 1124 | if (!is_kernel_in_hyp_mode()) |
Marc Zyngier | e537ecd | 2016-06-30 18:40:48 +0100 | [diff] [blame] | 1125 | __cpu_reset_hyp_mode(hyp_default_vectors, |
| 1126 | kvm_get_idmap_start()); |
Marc Zyngier | d157f4a | 2013-04-12 19:12:07 +0100 | [diff] [blame] | 1127 | } |
| 1128 | |
AKASHI Takahiro | 67f6919 | 2016-04-27 17:47:05 +0100 | [diff] [blame] | 1129 | static void _kvm_arch_hardware_enable(void *discard) |
| 1130 | { |
| 1131 | if (!__this_cpu_read(kvm_arm_hardware_enabled)) { |
| 1132 | cpu_hyp_reinit(); |
| 1133 | __this_cpu_write(kvm_arm_hardware_enabled, 1); |
| 1134 | } |
| 1135 | } |
| 1136 | |
| 1137 | int kvm_arch_hardware_enable(void) |
| 1138 | { |
| 1139 | _kvm_arch_hardware_enable(NULL); |
| 1140 | return 0; |
| 1141 | } |
| 1142 | |
| 1143 | static void _kvm_arch_hardware_disable(void *discard) |
| 1144 | { |
| 1145 | if (__this_cpu_read(kvm_arm_hardware_enabled)) { |
| 1146 | cpu_hyp_reset(); |
| 1147 | __this_cpu_write(kvm_arm_hardware_enabled, 0); |
| 1148 | } |
| 1149 | } |
| 1150 | |
| 1151 | void kvm_arch_hardware_disable(void) |
| 1152 | { |
| 1153 | _kvm_arch_hardware_disable(NULL); |
| 1154 | } |
Marc Zyngier | d157f4a | 2013-04-12 19:12:07 +0100 | [diff] [blame] | 1155 | |
Lorenzo Pieralisi | 1fcf7ce | 2013-08-05 15:04:46 +0100 | [diff] [blame] | 1156 | #ifdef CONFIG_CPU_PM |
| 1157 | static int hyp_init_cpu_pm_notifier(struct notifier_block *self, |
| 1158 | unsigned long cmd, |
| 1159 | void *v) |
| 1160 | { |
AKASHI Takahiro | 67f6919 | 2016-04-27 17:47:05 +0100 | [diff] [blame] | 1161 | /* |
| 1162 | * kvm_arm_hardware_enabled is left with its old value over |
| 1163 | * PM_ENTER->PM_EXIT. It is used to indicate PM_EXIT should |
| 1164 | * re-enable hyp. |
| 1165 | */ |
| 1166 | switch (cmd) { |
| 1167 | case CPU_PM_ENTER: |
| 1168 | if (__this_cpu_read(kvm_arm_hardware_enabled)) |
| 1169 | /* |
| 1170 | * don't update kvm_arm_hardware_enabled here |
| 1171 | * so that the hardware will be re-enabled |
| 1172 | * when we resume. See below. |
| 1173 | */ |
| 1174 | cpu_hyp_reset(); |
Lorenzo Pieralisi | 1fcf7ce | 2013-08-05 15:04:46 +0100 | [diff] [blame] | 1175 | |
AKASHI Takahiro | 67f6919 | 2016-04-27 17:47:05 +0100 | [diff] [blame] | 1176 | return NOTIFY_OK; |
| 1177 | case CPU_PM_EXIT: |
| 1178 | if (__this_cpu_read(kvm_arm_hardware_enabled)) |
| 1179 | /* The hardware was enabled before suspend. */ |
| 1180 | cpu_hyp_reinit(); |
| 1181 | |
| 1182 | return NOTIFY_OK; |
| 1183 | |
| 1184 | default: |
| 1185 | return NOTIFY_DONE; |
| 1186 | } |
Lorenzo Pieralisi | 1fcf7ce | 2013-08-05 15:04:46 +0100 | [diff] [blame] | 1187 | } |
| 1188 | |
| 1189 | static struct notifier_block hyp_init_cpu_pm_nb = { |
| 1190 | .notifier_call = hyp_init_cpu_pm_notifier, |
| 1191 | }; |
| 1192 | |
| 1193 | static void __init hyp_cpu_pm_init(void) |
| 1194 | { |
| 1195 | cpu_pm_register_notifier(&hyp_init_cpu_pm_nb); |
| 1196 | } |
Sudeep Holla | 06a71a2 | 2016-04-04 14:46:51 +0100 | [diff] [blame] | 1197 | static void __init hyp_cpu_pm_exit(void) |
| 1198 | { |
| 1199 | cpu_pm_unregister_notifier(&hyp_init_cpu_pm_nb); |
| 1200 | } |
Lorenzo Pieralisi | 1fcf7ce | 2013-08-05 15:04:46 +0100 | [diff] [blame] | 1201 | #else |
| 1202 | static inline void hyp_cpu_pm_init(void) |
| 1203 | { |
| 1204 | } |
Sudeep Holla | 06a71a2 | 2016-04-04 14:46:51 +0100 | [diff] [blame] | 1205 | static inline void hyp_cpu_pm_exit(void) |
| 1206 | { |
| 1207 | } |
Lorenzo Pieralisi | 1fcf7ce | 2013-08-05 15:04:46 +0100 | [diff] [blame] | 1208 | #endif |
| 1209 | |
Marc Zyngier | 1e947ba | 2015-01-29 11:59:54 +0000 | [diff] [blame] | 1210 | static void teardown_common_resources(void) |
| 1211 | { |
| 1212 | free_percpu(kvm_host_cpu_state); |
| 1213 | } |
| 1214 | |
| 1215 | static int init_common_resources(void) |
| 1216 | { |
| 1217 | kvm_host_cpu_state = alloc_percpu(kvm_cpu_context_t); |
| 1218 | if (!kvm_host_cpu_state) { |
| 1219 | kvm_err("Cannot allocate host CPU state\n"); |
| 1220 | return -ENOMEM; |
| 1221 | } |
| 1222 | |
Vladimir Murzin | 6134993 | 2016-09-22 09:18:01 +0100 | [diff] [blame] | 1223 | /* set size of VMID supported by CPU */ |
| 1224 | kvm_vmid_bits = kvm_get_vmid_bits(); |
| 1225 | kvm_info("%d-bit VMID\n", kvm_vmid_bits); |
| 1226 | |
Marc Zyngier | 1e947ba | 2015-01-29 11:59:54 +0000 | [diff] [blame] | 1227 | return 0; |
| 1228 | } |
| 1229 | |
| 1230 | static int init_subsystems(void) |
| 1231 | { |
AKASHI Takahiro | 67f6919 | 2016-04-27 17:47:05 +0100 | [diff] [blame] | 1232 | int err = 0; |
Marc Zyngier | 1e947ba | 2015-01-29 11:59:54 +0000 | [diff] [blame] | 1233 | |
| 1234 | /* |
AKASHI Takahiro | 67f6919 | 2016-04-27 17:47:05 +0100 | [diff] [blame] | 1235 | * Enable hardware so that subsystem initialisation can access EL2. |
James Morse | 5f5560b | 2016-03-30 18:33:04 +0100 | [diff] [blame] | 1236 | */ |
AKASHI Takahiro | 67f6919 | 2016-04-27 17:47:05 +0100 | [diff] [blame] | 1237 | on_each_cpu(_kvm_arch_hardware_enable, NULL, 1); |
James Morse | 5f5560b | 2016-03-30 18:33:04 +0100 | [diff] [blame] | 1238 | |
| 1239 | /* |
| 1240 | * Register CPU lower-power notifier |
| 1241 | */ |
| 1242 | hyp_cpu_pm_init(); |
| 1243 | |
| 1244 | /* |
Marc Zyngier | 1e947ba | 2015-01-29 11:59:54 +0000 | [diff] [blame] | 1245 | * Init HYP view of VGIC |
| 1246 | */ |
| 1247 | err = kvm_vgic_hyp_init(); |
| 1248 | switch (err) { |
| 1249 | case 0: |
| 1250 | vgic_present = true; |
| 1251 | break; |
| 1252 | case -ENODEV: |
| 1253 | case -ENXIO: |
| 1254 | vgic_present = false; |
AKASHI Takahiro | 67f6919 | 2016-04-27 17:47:05 +0100 | [diff] [blame] | 1255 | err = 0; |
Marc Zyngier | 1e947ba | 2015-01-29 11:59:54 +0000 | [diff] [blame] | 1256 | break; |
| 1257 | default: |
AKASHI Takahiro | 67f6919 | 2016-04-27 17:47:05 +0100 | [diff] [blame] | 1258 | goto out; |
Marc Zyngier | 1e947ba | 2015-01-29 11:59:54 +0000 | [diff] [blame] | 1259 | } |
| 1260 | |
| 1261 | /* |
| 1262 | * Init HYP architected timer support |
| 1263 | */ |
| 1264 | err = kvm_timer_hyp_init(); |
| 1265 | if (err) |
AKASHI Takahiro | 67f6919 | 2016-04-27 17:47:05 +0100 | [diff] [blame] | 1266 | goto out; |
Marc Zyngier | 1e947ba | 2015-01-29 11:59:54 +0000 | [diff] [blame] | 1267 | |
| 1268 | kvm_perf_init(); |
| 1269 | kvm_coproc_table_init(); |
| 1270 | |
AKASHI Takahiro | 67f6919 | 2016-04-27 17:47:05 +0100 | [diff] [blame] | 1271 | out: |
| 1272 | on_each_cpu(_kvm_arch_hardware_disable, NULL, 1); |
| 1273 | |
| 1274 | return err; |
Marc Zyngier | 1e947ba | 2015-01-29 11:59:54 +0000 | [diff] [blame] | 1275 | } |
| 1276 | |
| 1277 | static void teardown_hyp_mode(void) |
| 1278 | { |
| 1279 | int cpu; |
| 1280 | |
| 1281 | if (is_kernel_in_hyp_mode()) |
| 1282 | return; |
| 1283 | |
| 1284 | free_hyp_pgds(); |
| 1285 | for_each_possible_cpu(cpu) |
| 1286 | free_page(per_cpu(kvm_arm_hyp_stack_page, cpu)); |
Sudeep Holla | 06a71a2 | 2016-04-04 14:46:51 +0100 | [diff] [blame] | 1287 | hyp_cpu_pm_exit(); |
Marc Zyngier | 1e947ba | 2015-01-29 11:59:54 +0000 | [diff] [blame] | 1288 | } |
| 1289 | |
| 1290 | static int init_vhe_mode(void) |
| 1291 | { |
Marc Zyngier | 1e947ba | 2015-01-29 11:59:54 +0000 | [diff] [blame] | 1292 | kvm_info("VHE mode initialized successfully\n"); |
| 1293 | return 0; |
| 1294 | } |
| 1295 | |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1296 | /** |
| 1297 | * Inits Hyp-mode on all online CPUs |
| 1298 | */ |
| 1299 | static int init_hyp_mode(void) |
| 1300 | { |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1301 | int cpu; |
| 1302 | int err = 0; |
| 1303 | |
| 1304 | /* |
| 1305 | * Allocate Hyp PGD and setup Hyp identity mapping |
| 1306 | */ |
| 1307 | err = kvm_mmu_init(); |
| 1308 | if (err) |
| 1309 | goto out_err; |
| 1310 | |
| 1311 | /* |
| 1312 | * It is probably enough to obtain the default on one |
| 1313 | * CPU. It's unlikely to be different on the others. |
| 1314 | */ |
| 1315 | hyp_default_vectors = __hyp_get_vectors(); |
| 1316 | |
| 1317 | /* |
| 1318 | * Allocate stack pages for Hypervisor-mode |
| 1319 | */ |
| 1320 | for_each_possible_cpu(cpu) { |
| 1321 | unsigned long stack_page; |
| 1322 | |
| 1323 | stack_page = __get_free_page(GFP_KERNEL); |
| 1324 | if (!stack_page) { |
| 1325 | err = -ENOMEM; |
Marc Zyngier | 1e947ba | 2015-01-29 11:59:54 +0000 | [diff] [blame] | 1326 | goto out_err; |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1327 | } |
| 1328 | |
| 1329 | per_cpu(kvm_arm_hyp_stack_page, cpu) = stack_page; |
| 1330 | } |
| 1331 | |
| 1332 | /* |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1333 | * Map the Hyp-code called directly from the host |
| 1334 | */ |
Linus Torvalds | 588ab3f | 2016-03-17 20:03:47 -0700 | [diff] [blame] | 1335 | err = create_hyp_mappings(kvm_ksym_ref(__hyp_text_start), |
Marc Zyngier | 5900270 | 2016-06-13 15:00:48 +0100 | [diff] [blame] | 1336 | kvm_ksym_ref(__hyp_text_end), PAGE_HYP_EXEC); |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1337 | if (err) { |
| 1338 | kvm_err("Cannot map world-switch code\n"); |
Marc Zyngier | 1e947ba | 2015-01-29 11:59:54 +0000 | [diff] [blame] | 1339 | goto out_err; |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1340 | } |
| 1341 | |
Ard Biesheuvel | a0bf977 | 2016-02-16 13:52:39 +0100 | [diff] [blame] | 1342 | err = create_hyp_mappings(kvm_ksym_ref(__start_rodata), |
Marc Zyngier | 74a6b88 | 2016-06-13 15:00:47 +0100 | [diff] [blame] | 1343 | kvm_ksym_ref(__end_rodata), PAGE_HYP_RO); |
Marc Zyngier | 910917b | 2015-10-27 12:18:48 +0000 | [diff] [blame] | 1344 | if (err) { |
| 1345 | kvm_err("Cannot map rodata section\n"); |
Marc Zyngier | 1e947ba | 2015-01-29 11:59:54 +0000 | [diff] [blame] | 1346 | goto out_err; |
Marc Zyngier | 910917b | 2015-10-27 12:18:48 +0000 | [diff] [blame] | 1347 | } |
| 1348 | |
Marc Zyngier | c8ea039 | 2016-10-20 10:17:21 +0100 | [diff] [blame] | 1349 | err = create_hyp_mappings(kvm_ksym_ref(__bss_start), |
| 1350 | kvm_ksym_ref(__bss_stop), PAGE_HYP_RO); |
| 1351 | if (err) { |
| 1352 | kvm_err("Cannot map bss section\n"); |
| 1353 | goto out_err; |
| 1354 | } |
| 1355 | |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1356 | /* |
| 1357 | * Map the Hyp stack pages |
| 1358 | */ |
| 1359 | for_each_possible_cpu(cpu) { |
| 1360 | char *stack_page = (char *)per_cpu(kvm_arm_hyp_stack_page, cpu); |
Marc Zyngier | c8dddec | 2016-06-13 15:00:45 +0100 | [diff] [blame] | 1361 | err = create_hyp_mappings(stack_page, stack_page + PAGE_SIZE, |
| 1362 | PAGE_HYP); |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1363 | |
| 1364 | if (err) { |
| 1365 | kvm_err("Cannot map hyp stack\n"); |
Marc Zyngier | 1e947ba | 2015-01-29 11:59:54 +0000 | [diff] [blame] | 1366 | goto out_err; |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1367 | } |
| 1368 | } |
| 1369 | |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1370 | for_each_possible_cpu(cpu) { |
Marc Zyngier | 3de50da | 2013-04-08 16:47:19 +0100 | [diff] [blame] | 1371 | kvm_cpu_context_t *cpu_ctxt; |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1372 | |
Marc Zyngier | 3de50da | 2013-04-08 16:47:19 +0100 | [diff] [blame] | 1373 | cpu_ctxt = per_cpu_ptr(kvm_host_cpu_state, cpu); |
Marc Zyngier | c8dddec | 2016-06-13 15:00:45 +0100 | [diff] [blame] | 1374 | err = create_hyp_mappings(cpu_ctxt, cpu_ctxt + 1, PAGE_HYP); |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1375 | |
| 1376 | if (err) { |
Marc Zyngier | 3de50da | 2013-04-08 16:47:19 +0100 | [diff] [blame] | 1377 | kvm_err("Cannot map host CPU state: %d\n", err); |
Marc Zyngier | 1e947ba | 2015-01-29 11:59:54 +0000 | [diff] [blame] | 1378 | goto out_err; |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1379 | } |
| 1380 | } |
| 1381 | |
| 1382 | kvm_info("Hyp mode initialized successfully\n"); |
Marc Zyngier | 210552c | 2013-03-05 03:18:00 +0000 | [diff] [blame] | 1383 | |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1384 | return 0; |
Marc Zyngier | 1e947ba | 2015-01-29 11:59:54 +0000 | [diff] [blame] | 1385 | |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1386 | out_err: |
Marc Zyngier | 1e947ba | 2015-01-29 11:59:54 +0000 | [diff] [blame] | 1387 | teardown_hyp_mode(); |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1388 | kvm_err("error initializing Hyp mode: %d\n", err); |
| 1389 | return err; |
| 1390 | } |
| 1391 | |
Andre Przywara | d4e071c | 2013-04-17 12:52:01 +0200 | [diff] [blame] | 1392 | static void check_kvm_target_cpu(void *ret) |
| 1393 | { |
| 1394 | *(int *)ret = kvm_target_cpu(); |
| 1395 | } |
| 1396 | |
Andre Przywara | 4429fc6 | 2014-06-02 15:37:13 +0200 | [diff] [blame] | 1397 | struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr) |
| 1398 | { |
| 1399 | struct kvm_vcpu *vcpu; |
| 1400 | int i; |
| 1401 | |
| 1402 | mpidr &= MPIDR_HWID_BITMASK; |
| 1403 | kvm_for_each_vcpu(i, vcpu, kvm) { |
| 1404 | if (mpidr == kvm_vcpu_get_mpidr_aff(vcpu)) |
| 1405 | return vcpu; |
| 1406 | } |
| 1407 | return NULL; |
| 1408 | } |
| 1409 | |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1410 | /** |
| 1411 | * Initialize Hyp-mode and memory mappings on all CPUs. |
| 1412 | */ |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1413 | int kvm_arch_init(void *opaque) |
| 1414 | { |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1415 | int err; |
Andre Przywara | d4e071c | 2013-04-17 12:52:01 +0200 | [diff] [blame] | 1416 | int ret, cpu; |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1417 | |
| 1418 | if (!is_hyp_mode_available()) { |
| 1419 | kvm_err("HYP mode not available\n"); |
| 1420 | return -ENODEV; |
| 1421 | } |
| 1422 | |
Andre Przywara | d4e071c | 2013-04-17 12:52:01 +0200 | [diff] [blame] | 1423 | for_each_online_cpu(cpu) { |
| 1424 | smp_call_function_single(cpu, check_kvm_target_cpu, &ret, 1); |
| 1425 | if (ret < 0) { |
| 1426 | kvm_err("Error, CPU %d not supported!\n", cpu); |
| 1427 | return -ENODEV; |
| 1428 | } |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1429 | } |
| 1430 | |
Marc Zyngier | 1e947ba | 2015-01-29 11:59:54 +0000 | [diff] [blame] | 1431 | err = init_common_resources(); |
| 1432 | if (err) |
| 1433 | return err; |
Srivatsa S. Bhat | 8146875 | 2014-03-18 15:53:05 +0530 | [diff] [blame] | 1434 | |
Marc Zyngier | 1e947ba | 2015-01-29 11:59:54 +0000 | [diff] [blame] | 1435 | if (is_kernel_in_hyp_mode()) |
| 1436 | err = init_vhe_mode(); |
| 1437 | else |
| 1438 | err = init_hyp_mode(); |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1439 | if (err) |
| 1440 | goto out_err; |
| 1441 | |
Marc Zyngier | 1e947ba | 2015-01-29 11:59:54 +0000 | [diff] [blame] | 1442 | err = init_subsystems(); |
| 1443 | if (err) |
| 1444 | goto out_hyp; |
Marc Zyngier | d157f4a | 2013-04-12 19:12:07 +0100 | [diff] [blame] | 1445 | |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1446 | return 0; |
Marc Zyngier | 1e947ba | 2015-01-29 11:59:54 +0000 | [diff] [blame] | 1447 | |
| 1448 | out_hyp: |
| 1449 | teardown_hyp_mode(); |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1450 | out_err: |
Marc Zyngier | 1e947ba | 2015-01-29 11:59:54 +0000 | [diff] [blame] | 1451 | teardown_common_resources(); |
Christoffer Dall | 342cd0a | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1452 | return err; |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1453 | } |
| 1454 | |
| 1455 | /* NOP: Compiling as a module not supported */ |
| 1456 | void kvm_arch_exit(void) |
| 1457 | { |
Marc Zyngier | 210552c | 2013-03-05 03:18:00 +0000 | [diff] [blame] | 1458 | kvm_perf_teardown(); |
Christoffer Dall | 749cf76c | 2013-01-20 18:28:06 -0500 | [diff] [blame] | 1459 | } |
| 1460 | |
| 1461 | static int arm_init(void) |
| 1462 | { |
| 1463 | int rc = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); |
| 1464 | return rc; |
| 1465 | } |
| 1466 | |
| 1467 | module_init(arm_init); |