Marc Zyngier | 4f8d663 | 2012-12-10 16:29:28 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2012,2013 - ARM Ltd |
| 3 | * Author: Marc Zyngier <marc.zyngier@arm.com> |
| 4 | * |
| 5 | * Derived from arch/arm/include/asm/kvm_host.h: |
| 6 | * Copyright (C) 2012 - Virtual Open Systems and Columbia University |
| 7 | * Author: Christoffer Dall <c.dall@virtualopensystems.com> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License version 2 as |
| 11 | * published by the Free Software Foundation. |
| 12 | * |
| 13 | * This program is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | * GNU General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU General Public License |
| 19 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 20 | */ |
| 21 | |
| 22 | #ifndef __ARM64_KVM_HOST_H__ |
| 23 | #define __ARM64_KVM_HOST_H__ |
| 24 | |
Paolo Bonzini | 6564730 | 2014-08-29 14:01:17 +0200 | [diff] [blame] | 25 | #include <linux/types.h> |
| 26 | #include <linux/kvm_types.h> |
Marc Zyngier | 4f8d663 | 2012-12-10 16:29:28 +0000 | [diff] [blame] | 27 | #include <asm/kvm.h> |
| 28 | #include <asm/kvm_asm.h> |
| 29 | #include <asm/kvm_mmio.h> |
| 30 | |
Anup Patel | da78147 | 2013-12-12 16:12:22 +0000 | [diff] [blame] | 31 | #if defined(CONFIG_KVM_ARM_MAX_VCPUS) |
| 32 | #define KVM_MAX_VCPUS CONFIG_KVM_ARM_MAX_VCPUS |
| 33 | #else |
| 34 | #define KVM_MAX_VCPUS 0 |
| 35 | #endif |
| 36 | |
Marc Zyngier | 4f8d663 | 2012-12-10 16:29:28 +0000 | [diff] [blame] | 37 | #define KVM_USER_MEM_SLOTS 32 |
| 38 | #define KVM_PRIVATE_MEM_SLOTS 4 |
| 39 | #define KVM_COALESCED_MMIO_PAGE_OFFSET 1 |
| 40 | |
| 41 | #include <kvm/arm_vgic.h> |
| 42 | #include <kvm/arm_arch_timer.h> |
| 43 | |
Anup Patel | 7d0f84a | 2014-04-29 11:24:16 +0530 | [diff] [blame] | 44 | #define KVM_VCPU_MAX_FEATURES 3 |
Marc Zyngier | 4f8d663 | 2012-12-10 16:29:28 +0000 | [diff] [blame] | 45 | |
Will Deacon | 6951e48 | 2014-08-26 15:13:20 +0100 | [diff] [blame] | 46 | int __attribute_const__ kvm_target_cpu(void); |
Marc Zyngier | 4f8d663 | 2012-12-10 16:29:28 +0000 | [diff] [blame] | 47 | int kvm_reset_vcpu(struct kvm_vcpu *vcpu); |
| 48 | int kvm_arch_dev_ioctl_check_extension(long ext); |
| 49 | |
| 50 | struct kvm_arch { |
| 51 | /* The VMID generation used for the virt. memory system */ |
| 52 | u64 vmid_gen; |
| 53 | u32 vmid; |
| 54 | |
| 55 | /* 1-level 2nd stage table and lock */ |
| 56 | spinlock_t pgd_lock; |
| 57 | pgd_t *pgd; |
| 58 | |
| 59 | /* VTTBR value associated with above pgd and vmid */ |
| 60 | u64 vttbr; |
| 61 | |
Andre Przywara | 3caa2d8 | 2014-06-02 16:26:01 +0200 | [diff] [blame^] | 62 | /* The maximum number of vCPUs depends on the used GIC model */ |
| 63 | int max_vcpus; |
| 64 | |
Marc Zyngier | 4f8d663 | 2012-12-10 16:29:28 +0000 | [diff] [blame] | 65 | /* Interrupt controller */ |
| 66 | struct vgic_dist vgic; |
| 67 | |
| 68 | /* Timer */ |
| 69 | struct arch_timer_kvm timer; |
| 70 | }; |
| 71 | |
| 72 | #define KVM_NR_MEM_OBJS 40 |
| 73 | |
| 74 | /* |
| 75 | * We don't want allocation failures within the mmu code, so we preallocate |
| 76 | * enough memory for a single page fault in a cache. |
| 77 | */ |
| 78 | struct kvm_mmu_memory_cache { |
| 79 | int nobjs; |
| 80 | void *objects[KVM_NR_MEM_OBJS]; |
| 81 | }; |
| 82 | |
| 83 | struct kvm_vcpu_fault_info { |
| 84 | u32 esr_el2; /* Hyp Syndrom Register */ |
| 85 | u64 far_el2; /* Hyp Fault Address Register */ |
| 86 | u64 hpfar_el2; /* Hyp IPA Fault Address Register */ |
| 87 | }; |
| 88 | |
| 89 | struct kvm_cpu_context { |
| 90 | struct kvm_regs gp_regs; |
Marc Zyngier | 40033a6 | 2013-02-06 19:17:50 +0000 | [diff] [blame] | 91 | union { |
| 92 | u64 sys_regs[NR_SYS_REGS]; |
Marc Zyngier | 7256401 | 2014-04-24 10:27:13 +0100 | [diff] [blame] | 93 | u32 copro[NR_COPRO_REGS]; |
Marc Zyngier | 40033a6 | 2013-02-06 19:17:50 +0000 | [diff] [blame] | 94 | }; |
Marc Zyngier | 4f8d663 | 2012-12-10 16:29:28 +0000 | [diff] [blame] | 95 | }; |
| 96 | |
| 97 | typedef struct kvm_cpu_context kvm_cpu_context_t; |
| 98 | |
| 99 | struct kvm_vcpu_arch { |
| 100 | struct kvm_cpu_context ctxt; |
| 101 | |
| 102 | /* HYP configuration */ |
| 103 | u64 hcr_el2; |
| 104 | |
| 105 | /* Exception Information */ |
| 106 | struct kvm_vcpu_fault_info fault; |
| 107 | |
Marc Zyngier | 0c557ed | 2014-04-24 10:24:46 +0100 | [diff] [blame] | 108 | /* Debug state */ |
| 109 | u64 debug_flags; |
| 110 | |
Marc Zyngier | 4f8d663 | 2012-12-10 16:29:28 +0000 | [diff] [blame] | 111 | /* Pointer to host CPU context */ |
| 112 | kvm_cpu_context_t *host_cpu_context; |
| 113 | |
| 114 | /* VGIC state */ |
| 115 | struct vgic_cpu vgic_cpu; |
| 116 | struct arch_timer_cpu timer_cpu; |
| 117 | |
| 118 | /* |
| 119 | * Anything that is not used directly from assembly code goes |
| 120 | * here. |
| 121 | */ |
| 122 | /* dcache set/way operation pending */ |
| 123 | int last_pcpu; |
| 124 | cpumask_t require_dcache_flush; |
| 125 | |
| 126 | /* Don't run the guest */ |
| 127 | bool pause; |
| 128 | |
| 129 | /* IO related fields */ |
| 130 | struct kvm_decode mmio_decode; |
| 131 | |
| 132 | /* Interrupt related fields */ |
| 133 | u64 irq_lines; /* IRQ and FIQ levels */ |
| 134 | |
| 135 | /* Cache some mmu pages needed inside spinlock regions */ |
| 136 | struct kvm_mmu_memory_cache mmu_page_cache; |
| 137 | |
| 138 | /* Target CPU and feature flags */ |
Chen Gang | 6c8c0c4 | 2013-07-22 04:40:38 +0100 | [diff] [blame] | 139 | int target; |
Marc Zyngier | 4f8d663 | 2012-12-10 16:29:28 +0000 | [diff] [blame] | 140 | DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES); |
| 141 | |
| 142 | /* Detect first run of a vcpu */ |
| 143 | bool has_run_once; |
| 144 | }; |
| 145 | |
| 146 | #define vcpu_gp_regs(v) (&(v)->arch.ctxt.gp_regs) |
| 147 | #define vcpu_sys_reg(v,r) ((v)->arch.ctxt.sys_regs[(r)]) |
Marc Zyngier | 7256401 | 2014-04-24 10:27:13 +0100 | [diff] [blame] | 148 | /* |
| 149 | * CP14 and CP15 live in the same array, as they are backed by the |
| 150 | * same system registers. |
| 151 | */ |
| 152 | #define vcpu_cp14(v,r) ((v)->arch.ctxt.copro[(r)]) |
| 153 | #define vcpu_cp15(v,r) ((v)->arch.ctxt.copro[(r)]) |
Marc Zyngier | 4f8d663 | 2012-12-10 16:29:28 +0000 | [diff] [blame] | 154 | |
Victor Kamensky | f0a3eaf | 2014-07-02 17:19:30 +0100 | [diff] [blame] | 155 | #ifdef CONFIG_CPU_BIG_ENDIAN |
Marc Zyngier | dedf97e | 2014-08-01 12:00:36 +0100 | [diff] [blame] | 156 | #define vcpu_cp15_64_high(v,r) vcpu_cp15((v),(r)) |
| 157 | #define vcpu_cp15_64_low(v,r) vcpu_cp15((v),(r) + 1) |
Victor Kamensky | f0a3eaf | 2014-07-02 17:19:30 +0100 | [diff] [blame] | 158 | #else |
Marc Zyngier | dedf97e | 2014-08-01 12:00:36 +0100 | [diff] [blame] | 159 | #define vcpu_cp15_64_high(v,r) vcpu_cp15((v),(r) + 1) |
| 160 | #define vcpu_cp15_64_low(v,r) vcpu_cp15((v),(r)) |
Victor Kamensky | f0a3eaf | 2014-07-02 17:19:30 +0100 | [diff] [blame] | 161 | #endif |
| 162 | |
Marc Zyngier | 4f8d663 | 2012-12-10 16:29:28 +0000 | [diff] [blame] | 163 | struct kvm_vm_stat { |
| 164 | u32 remote_tlb_flush; |
| 165 | }; |
| 166 | |
| 167 | struct kvm_vcpu_stat { |
| 168 | u32 halt_wakeup; |
| 169 | }; |
| 170 | |
Anup Patel | 473bdc0 | 2013-09-30 14:20:06 +0530 | [diff] [blame] | 171 | int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init); |
Marc Zyngier | 4f8d663 | 2012-12-10 16:29:28 +0000 | [diff] [blame] | 172 | unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu); |
| 173 | int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices); |
Marc Zyngier | 4f8d663 | 2012-12-10 16:29:28 +0000 | [diff] [blame] | 174 | int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); |
| 175 | int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); |
| 176 | |
| 177 | #define KVM_ARCH_WANT_MMU_NOTIFIER |
Marc Zyngier | 4f8d663 | 2012-12-10 16:29:28 +0000 | [diff] [blame] | 178 | int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); |
| 179 | int kvm_unmap_hva_range(struct kvm *kvm, |
| 180 | unsigned long start, unsigned long end); |
| 181 | void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); |
| 182 | |
| 183 | /* We do not have shadow page tables, hence the empty hooks */ |
Andres Lagar-Cavilla | 5712846 | 2014-09-22 14:54:42 -0700 | [diff] [blame] | 184 | static inline int kvm_age_hva(struct kvm *kvm, unsigned long start, |
| 185 | unsigned long end) |
Marc Zyngier | 4f8d663 | 2012-12-10 16:29:28 +0000 | [diff] [blame] | 186 | { |
| 187 | return 0; |
| 188 | } |
| 189 | |
| 190 | static inline int kvm_test_age_hva(struct kvm *kvm, unsigned long hva) |
| 191 | { |
| 192 | return 0; |
| 193 | } |
| 194 | |
Tang Chen | fe71557 | 2014-09-24 15:57:57 +0800 | [diff] [blame] | 195 | static inline void kvm_arch_mmu_notifier_invalidate_page(struct kvm *kvm, |
| 196 | unsigned long address) |
| 197 | { |
| 198 | } |
| 199 | |
Marc Zyngier | 4f8d663 | 2012-12-10 16:29:28 +0000 | [diff] [blame] | 200 | struct kvm_vcpu *kvm_arm_get_running_vcpu(void); |
Will Deacon | 4000be4 | 2014-08-26 15:13:21 +0100 | [diff] [blame] | 201 | struct kvm_vcpu * __percpu *kvm_get_running_vcpus(void); |
Marc Zyngier | 4f8d663 | 2012-12-10 16:29:28 +0000 | [diff] [blame] | 202 | |
| 203 | u64 kvm_call_hyp(void *hypfn, ...); |
Christoffer Dall | cf5d3188 | 2014-10-16 17:00:18 +0200 | [diff] [blame] | 204 | void force_vm_exit(const cpumask_t *mask); |
Mario Smarduch | 8199ed0 | 2015-01-15 15:58:59 -0800 | [diff] [blame] | 205 | void kvm_mmu_wp_memory_region(struct kvm *kvm, int slot); |
Marc Zyngier | 4f8d663 | 2012-12-10 16:29:28 +0000 | [diff] [blame] | 206 | |
| 207 | int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run, |
| 208 | int exception_index); |
| 209 | |
| 210 | int kvm_perf_init(void); |
| 211 | int kvm_perf_teardown(void); |
| 212 | |
Andre Przywara | 4429fc6 | 2014-06-02 15:37:13 +0200 | [diff] [blame] | 213 | struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr); |
| 214 | |
Marc Zyngier | 092bd14 | 2012-12-17 17:07:52 +0000 | [diff] [blame] | 215 | static inline void __cpu_init_hyp_mode(phys_addr_t boot_pgd_ptr, |
| 216 | phys_addr_t pgd_ptr, |
| 217 | unsigned long hyp_stack_ptr, |
| 218 | unsigned long vector_ptr) |
| 219 | { |
| 220 | /* |
| 221 | * Call initialization code, and switch to the full blown |
| 222 | * HYP code. |
| 223 | */ |
| 224 | kvm_call_hyp((void *)boot_pgd_ptr, pgd_ptr, |
| 225 | hyp_stack_ptr, vector_ptr); |
| 226 | } |
| 227 | |
Marc Zyngier | 1a9b130 | 2013-06-21 11:57:56 +0100 | [diff] [blame] | 228 | struct vgic_sr_vectors { |
| 229 | void *save_vgic; |
| 230 | void *restore_vgic; |
| 231 | }; |
| 232 | |
| 233 | static inline void vgic_arch_setup(const struct vgic_params *vgic) |
| 234 | { |
| 235 | extern struct vgic_sr_vectors __vgic_sr_vectors; |
| 236 | |
| 237 | switch(vgic->type) |
| 238 | { |
| 239 | case VGIC_V2: |
| 240 | __vgic_sr_vectors.save_vgic = __save_vgic_v2_state; |
| 241 | __vgic_sr_vectors.restore_vgic = __restore_vgic_v2_state; |
| 242 | break; |
| 243 | |
Marc Zyngier | 67b2abf | 2013-07-09 10:45:49 +0100 | [diff] [blame] | 244 | #ifdef CONFIG_ARM_GIC_V3 |
| 245 | case VGIC_V3: |
| 246 | __vgic_sr_vectors.save_vgic = __save_vgic_v3_state; |
| 247 | __vgic_sr_vectors.restore_vgic = __restore_vgic_v3_state; |
| 248 | break; |
| 249 | #endif |
| 250 | |
Marc Zyngier | 1a9b130 | 2013-06-21 11:57:56 +0100 | [diff] [blame] | 251 | default: |
| 252 | BUG(); |
| 253 | } |
| 254 | } |
| 255 | |
Radim Krčmář | 13a34e0 | 2014-08-28 15:13:03 +0200 | [diff] [blame] | 256 | static inline void kvm_arch_hardware_disable(void) {} |
Radim Krčmář | 0865e63 | 2014-08-28 15:13:02 +0200 | [diff] [blame] | 257 | static inline void kvm_arch_hardware_unsetup(void) {} |
| 258 | static inline void kvm_arch_sync_events(struct kvm *kvm) {} |
| 259 | static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {} |
| 260 | static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {} |
| 261 | |
Marc Zyngier | 4f8d663 | 2012-12-10 16:29:28 +0000 | [diff] [blame] | 262 | #endif /* __ARM64_KVM_HOST_H__ */ |