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 #define __KVM_HAVE_ARCH_INTC_INITIALIZED 32 33 #define KVM_USER_MEM_SLOTS 32 34 #define KVM_PRIVATE_MEM_SLOTS 4 35 #define KVM_COALESCED_MMIO_PAGE_OFFSET 1 36 37 #include <kvm/arm_vgic.h> 38 #include <kvm/arm_arch_timer.h> 39 40 #define KVM_MAX_VCPUS VGIC_V3_MAX_CPUS 41 42 #define KVM_VCPU_MAX_FEATURES 3 43 44 int __attribute_const__ kvm_target_cpu(void); 45 int kvm_reset_vcpu(struct kvm_vcpu *vcpu); 46 int kvm_arch_dev_ioctl_check_extension(long ext); 47 48 struct kvm_arch { 49 /* The VMID generation used for the virt. memory system */ 50 u64 vmid_gen; 51 u32 vmid; 52 53 /* 1-level 2nd stage table and lock */ 54 spinlock_t pgd_lock; 55 pgd_t *pgd; 56 57 /* VTTBR value associated with above pgd and vmid */ 58 u64 vttbr; 59 60 /* The maximum number of vCPUs depends on the used GIC model */ 61 int max_vcpus; 62 63 /* Interrupt controller */ 64 struct vgic_dist vgic; 65 66 /* Timer */ 67 struct arch_timer_kvm timer; 68 }; 69 70 #define KVM_NR_MEM_OBJS 40 71 72 /* 73 * We don't want allocation failures within the mmu code, so we preallocate 74 * enough memory for a single page fault in a cache. 75 */ 76 struct kvm_mmu_memory_cache { 77 int nobjs; 78 void *objects[KVM_NR_MEM_OBJS]; 79 }; 80 81 struct kvm_vcpu_fault_info { 82 u32 esr_el2; /* Hyp Syndrom Register */ 83 u64 far_el2; /* Hyp Fault Address Register */ 84 u64 hpfar_el2; /* Hyp IPA Fault Address Register */ 85 }; 86 87 struct kvm_cpu_context { 88 struct kvm_regs gp_regs; 89 union { 90 u64 sys_regs[NR_SYS_REGS]; 91 u32 copro[NR_COPRO_REGS]; 92 }; 93 }; 94 95 typedef struct kvm_cpu_context kvm_cpu_context_t; 96 97 struct kvm_vcpu_arch { 98 struct kvm_cpu_context ctxt; 99 100 /* HYP configuration */ 101 u64 hcr_el2; 102 u32 mdcr_el2; 103 104 /* Exception Information */ 105 struct kvm_vcpu_fault_info fault; 106 107 /* Guest debug state */ 108 u64 debug_flags; 109 110 /* 111 * We maintain more than a single set of debug registers to support 112 * debugging the guest from the host and to maintain separate host and 113 * guest state during world switches. vcpu_debug_state are the debug 114 * registers of the vcpu as the guest sees them. host_debug_state are 115 * the host registers which are saved and restored during 116 * world switches. external_debug_state contains the debug 117 * values we want to debug the guest. This is set via the 118 * KVM_SET_GUEST_DEBUG ioctl. 119 * 120 * debug_ptr points to the set of debug registers that should be loaded 121 * onto the hardware when running the guest. 122 */ 123 struct kvm_guest_debug_arch *debug_ptr; 124 struct kvm_guest_debug_arch vcpu_debug_state; 125 struct kvm_guest_debug_arch external_debug_state; 126 127 /* Pointer to host CPU context */ 128 kvm_cpu_context_t *host_cpu_context; 129 struct kvm_guest_debug_arch host_debug_state; 130 131 /* VGIC state */ 132 struct vgic_cpu vgic_cpu; 133 struct arch_timer_cpu timer_cpu; 134 135 /* 136 * Anything that is not used directly from assembly code goes 137 * here. 138 */ 139 140 /* 141 * Guest registers we preserve during guest debugging. 142 * 143 * These shadow registers are updated by the kvm_handle_sys_reg 144 * trap handler if the guest accesses or updates them while we 145 * are using guest debug. 146 */ 147 struct { 148 u32 mdscr_el1; 149 } guest_debug_preserved; 150 151 /* Don't run the guest */ 152 bool pause; 153 154 /* IO related fields */ 155 struct kvm_decode mmio_decode; 156 157 /* Interrupt related fields */ 158 u64 irq_lines; /* IRQ and FIQ levels */ 159 160 /* Cache some mmu pages needed inside spinlock regions */ 161 struct kvm_mmu_memory_cache mmu_page_cache; 162 163 /* Target CPU and feature flags */ 164 int target; 165 DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES); 166 167 /* Detect first run of a vcpu */ 168 bool has_run_once; 169 }; 170 171 #define vcpu_gp_regs(v) (&(v)->arch.ctxt.gp_regs) 172 #define vcpu_sys_reg(v,r) ((v)->arch.ctxt.sys_regs[(r)]) 173 /* 174 * CP14 and CP15 live in the same array, as they are backed by the 175 * same system registers. 176 */ 177 #define vcpu_cp14(v,r) ((v)->arch.ctxt.copro[(r)]) 178 #define vcpu_cp15(v,r) ((v)->arch.ctxt.copro[(r)]) 179 180 #ifdef CONFIG_CPU_BIG_ENDIAN 181 #define vcpu_cp15_64_high(v,r) vcpu_cp15((v),(r)) 182 #define vcpu_cp15_64_low(v,r) vcpu_cp15((v),(r) + 1) 183 #else 184 #define vcpu_cp15_64_high(v,r) vcpu_cp15((v),(r) + 1) 185 #define vcpu_cp15_64_low(v,r) vcpu_cp15((v),(r)) 186 #endif 187 188 struct kvm_vm_stat { 189 u32 remote_tlb_flush; 190 }; 191 192 struct kvm_vcpu_stat { 193 u32 halt_successful_poll; 194 u32 halt_attempted_poll; 195 u32 halt_wakeup; 196 }; 197 198 int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init); 199 unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu); 200 int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices); 201 int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); 202 int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); 203 204 #define KVM_ARCH_WANT_MMU_NOTIFIER 205 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); 206 int kvm_unmap_hva_range(struct kvm *kvm, 207 unsigned long start, unsigned long end); 208 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); 209 int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end); 210 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva); 211 212 /* We do not have shadow page tables, hence the empty hooks */ 213 static inline void kvm_arch_mmu_notifier_invalidate_page(struct kvm *kvm, 214 unsigned long address) 215 { 216 } 217 218 struct kvm_vcpu *kvm_arm_get_running_vcpu(void); 219 struct kvm_vcpu * __percpu *kvm_get_running_vcpus(void); 220 221 u64 kvm_call_hyp(void *hypfn, ...); 222 void force_vm_exit(const cpumask_t *mask); 223 void kvm_mmu_wp_memory_region(struct kvm *kvm, int slot); 224 225 int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run, 226 int exception_index); 227 228 int kvm_perf_init(void); 229 int kvm_perf_teardown(void); 230 231 struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr); 232 233 static inline void __cpu_init_hyp_mode(phys_addr_t boot_pgd_ptr, 234 phys_addr_t pgd_ptr, 235 unsigned long hyp_stack_ptr, 236 unsigned long vector_ptr) 237 { 238 /* 239 * Call initialization code, and switch to the full blown 240 * HYP code. 241 */ 242 kvm_call_hyp((void *)boot_pgd_ptr, pgd_ptr, 243 hyp_stack_ptr, vector_ptr); 244 } 245 246 static inline void kvm_arch_hardware_disable(void) {} 247 static inline void kvm_arch_hardware_unsetup(void) {} 248 static inline void kvm_arch_sync_events(struct kvm *kvm) {} 249 static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {} 250 static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {} 251 252 void kvm_arm_init_debug(void); 253 void kvm_arm_setup_debug(struct kvm_vcpu *vcpu); 254 void kvm_arm_clear_debug(struct kvm_vcpu *vcpu); 255 void kvm_arm_reset_debug_ptr(struct kvm_vcpu *vcpu); 256 257 #endif /* __ARM64_KVM_HOST_H__ */ 258