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 25 #include <linux/types.h> 26 #include <linux/kvm_types.h> 27 #include <asm/kvm.h> 28 #include <asm/kvm_asm.h> 29 #include <asm/kvm_mmio.h> 30 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 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 44 #define KVM_VCPU_MAX_FEATURES 3 45 46 int __attribute_const__ kvm_target_cpu(void); 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 62 /* Interrupt controller */ 63 struct vgic_dist vgic; 64 65 /* Timer */ 66 struct arch_timer_kvm timer; 67 }; 68 69 #define KVM_NR_MEM_OBJS 40 70 71 /* 72 * We don't want allocation failures within the mmu code, so we preallocate 73 * enough memory for a single page fault in a cache. 74 */ 75 struct kvm_mmu_memory_cache { 76 int nobjs; 77 void *objects[KVM_NR_MEM_OBJS]; 78 }; 79 80 struct kvm_vcpu_fault_info { 81 u32 esr_el2; /* Hyp Syndrom Register */ 82 u64 far_el2; /* Hyp Fault Address Register */ 83 u64 hpfar_el2; /* Hyp IPA Fault Address Register */ 84 }; 85 86 struct kvm_cpu_context { 87 struct kvm_regs gp_regs; 88 union { 89 u64 sys_regs[NR_SYS_REGS]; 90 u32 copro[NR_COPRO_REGS]; 91 }; 92 }; 93 94 typedef struct kvm_cpu_context kvm_cpu_context_t; 95 96 struct kvm_vcpu_arch { 97 struct kvm_cpu_context ctxt; 98 99 /* HYP configuration */ 100 u64 hcr_el2; 101 102 /* Exception Information */ 103 struct kvm_vcpu_fault_info fault; 104 105 /* Debug state */ 106 u64 debug_flags; 107 108 /* Pointer to host CPU context */ 109 kvm_cpu_context_t *host_cpu_context; 110 111 /* VGIC state */ 112 struct vgic_cpu vgic_cpu; 113 struct arch_timer_cpu timer_cpu; 114 115 /* 116 * Anything that is not used directly from assembly code goes 117 * here. 118 */ 119 /* dcache set/way operation pending */ 120 int last_pcpu; 121 cpumask_t require_dcache_flush; 122 123 /* Don't run the guest */ 124 bool pause; 125 126 /* IO related fields */ 127 struct kvm_decode mmio_decode; 128 129 /* Interrupt related fields */ 130 u64 irq_lines; /* IRQ and FIQ levels */ 131 132 /* Cache some mmu pages needed inside spinlock regions */ 133 struct kvm_mmu_memory_cache mmu_page_cache; 134 135 /* Target CPU and feature flags */ 136 int target; 137 DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES); 138 139 /* Detect first run of a vcpu */ 140 bool has_run_once; 141 }; 142 143 #define vcpu_gp_regs(v) (&(v)->arch.ctxt.gp_regs) 144 #define vcpu_sys_reg(v,r) ((v)->arch.ctxt.sys_regs[(r)]) 145 /* 146 * CP14 and CP15 live in the same array, as they are backed by the 147 * same system registers. 148 */ 149 #define vcpu_cp14(v,r) ((v)->arch.ctxt.copro[(r)]) 150 #define vcpu_cp15(v,r) ((v)->arch.ctxt.copro[(r)]) 151 152 #ifdef CONFIG_CPU_BIG_ENDIAN 153 #define vcpu_cp15_64_high(v,r) vcpu_cp15((v),(r)) 154 #define vcpu_cp15_64_low(v,r) vcpu_cp15((v),(r) + 1) 155 #else 156 #define vcpu_cp15_64_high(v,r) vcpu_cp15((v),(r) + 1) 157 #define vcpu_cp15_64_low(v,r) vcpu_cp15((v),(r)) 158 #endif 159 160 struct kvm_vm_stat { 161 u32 remote_tlb_flush; 162 }; 163 164 struct kvm_vcpu_stat { 165 u32 halt_wakeup; 166 }; 167 168 int kvm_vcpu_set_target(struct kvm_vcpu *vcpu, 169 const struct kvm_vcpu_init *init); 170 int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init); 171 unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu); 172 int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices); 173 int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); 174 int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); 175 176 #define KVM_ARCH_WANT_MMU_NOTIFIER 177 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); 178 int kvm_unmap_hva_range(struct kvm *kvm, 179 unsigned long start, unsigned long end); 180 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); 181 182 /* We do not have shadow page tables, hence the empty hooks */ 183 static inline int kvm_age_hva(struct kvm *kvm, unsigned long start, 184 unsigned long end) 185 { 186 return 0; 187 } 188 189 static inline int kvm_test_age_hva(struct kvm *kvm, unsigned long hva) 190 { 191 return 0; 192 } 193 194 static inline void kvm_arch_mmu_notifier_invalidate_page(struct kvm *kvm, 195 unsigned long address) 196 { 197 } 198 199 struct kvm_vcpu *kvm_arm_get_running_vcpu(void); 200 struct kvm_vcpu * __percpu *kvm_get_running_vcpus(void); 201 202 u64 kvm_call_hyp(void *hypfn, ...); 203 204 int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run, 205 int exception_index); 206 207 int kvm_perf_init(void); 208 int kvm_perf_teardown(void); 209 210 static inline void __cpu_init_hyp_mode(phys_addr_t boot_pgd_ptr, 211 phys_addr_t pgd_ptr, 212 unsigned long hyp_stack_ptr, 213 unsigned long vector_ptr) 214 { 215 /* 216 * Call initialization code, and switch to the full blown 217 * HYP code. 218 */ 219 kvm_call_hyp((void *)boot_pgd_ptr, pgd_ptr, 220 hyp_stack_ptr, vector_ptr); 221 } 222 223 struct vgic_sr_vectors { 224 void *save_vgic; 225 void *restore_vgic; 226 }; 227 228 static inline void vgic_arch_setup(const struct vgic_params *vgic) 229 { 230 extern struct vgic_sr_vectors __vgic_sr_vectors; 231 232 switch(vgic->type) 233 { 234 case VGIC_V2: 235 __vgic_sr_vectors.save_vgic = __save_vgic_v2_state; 236 __vgic_sr_vectors.restore_vgic = __restore_vgic_v2_state; 237 break; 238 239 #ifdef CONFIG_ARM_GIC_V3 240 case VGIC_V3: 241 __vgic_sr_vectors.save_vgic = __save_vgic_v3_state; 242 __vgic_sr_vectors.restore_vgic = __restore_vgic_v3_state; 243 break; 244 #endif 245 246 default: 247 BUG(); 248 } 249 } 250 251 static inline void kvm_arch_hardware_disable(void) {} 252 static inline void kvm_arch_hardware_unsetup(void) {} 253 static inline void kvm_arch_sync_events(struct kvm *kvm) {} 254 static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {} 255 static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {} 256 257 #endif /* __ARM64_KVM_HOST_H__ */ 258