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 #define KVM_HALT_POLL_NS_DEFAULT 500000 37 38 #include <kvm/arm_vgic.h> 39 #include <kvm/arm_arch_timer.h> 40 41 #define KVM_MAX_VCPUS VGIC_V3_MAX_CPUS 42 43 #define KVM_VCPU_MAX_FEATURES 3 44 45 int __attribute_const__ kvm_target_cpu(void); 46 int kvm_reset_vcpu(struct kvm_vcpu *vcpu); 47 int kvm_arch_dev_ioctl_check_extension(long ext); 48 49 struct kvm_arch { 50 /* The VMID generation used for the virt. memory system */ 51 u64 vmid_gen; 52 u32 vmid; 53 54 /* 1-level 2nd stage table and lock */ 55 spinlock_t pgd_lock; 56 pgd_t *pgd; 57 58 /* VTTBR value associated with above pgd and vmid */ 59 u64 vttbr; 60 61 /* The maximum number of vCPUs depends on the used GIC model */ 62 int max_vcpus; 63 64 /* Interrupt controller */ 65 struct vgic_dist vgic; 66 67 /* Timer */ 68 struct arch_timer_kvm timer; 69 }; 70 71 #define KVM_NR_MEM_OBJS 40 72 73 /* 74 * We don't want allocation failures within the mmu code, so we preallocate 75 * enough memory for a single page fault in a cache. 76 */ 77 struct kvm_mmu_memory_cache { 78 int nobjs; 79 void *objects[KVM_NR_MEM_OBJS]; 80 }; 81 82 struct kvm_vcpu_fault_info { 83 u32 esr_el2; /* Hyp Syndrom Register */ 84 u64 far_el2; /* Hyp Fault Address Register */ 85 u64 hpfar_el2; /* Hyp IPA Fault Address Register */ 86 }; 87 88 struct kvm_cpu_context { 89 struct kvm_regs gp_regs; 90 union { 91 u64 sys_regs[NR_SYS_REGS]; 92 u32 copro[NR_COPRO_REGS]; 93 }; 94 }; 95 96 typedef struct kvm_cpu_context kvm_cpu_context_t; 97 98 struct kvm_vcpu_arch { 99 struct kvm_cpu_context ctxt; 100 101 /* HYP configuration */ 102 u64 hcr_el2; 103 u32 mdcr_el2; 104 105 /* Exception Information */ 106 struct kvm_vcpu_fault_info fault; 107 108 /* Guest debug state */ 109 u64 debug_flags; 110 111 /* 112 * We maintain more than a single set of debug registers to support 113 * debugging the guest from the host and to maintain separate host and 114 * guest state during world switches. vcpu_debug_state are the debug 115 * registers of the vcpu as the guest sees them. host_debug_state are 116 * the host registers which are saved and restored during 117 * world switches. external_debug_state contains the debug 118 * values we want to debug the guest. This is set via the 119 * KVM_SET_GUEST_DEBUG ioctl. 120 * 121 * debug_ptr points to the set of debug registers that should be loaded 122 * onto the hardware when running the guest. 123 */ 124 struct kvm_guest_debug_arch *debug_ptr; 125 struct kvm_guest_debug_arch vcpu_debug_state; 126 struct kvm_guest_debug_arch external_debug_state; 127 128 /* Pointer to host CPU context */ 129 kvm_cpu_context_t *host_cpu_context; 130 struct kvm_guest_debug_arch host_debug_state; 131 132 /* VGIC state */ 133 struct vgic_cpu vgic_cpu; 134 struct arch_timer_cpu timer_cpu; 135 136 /* 137 * Anything that is not used directly from assembly code goes 138 * here. 139 */ 140 141 /* 142 * Guest registers we preserve during guest debugging. 143 * 144 * These shadow registers are updated by the kvm_handle_sys_reg 145 * trap handler if the guest accesses or updates them while we 146 * are using guest debug. 147 */ 148 struct { 149 u32 mdscr_el1; 150 } guest_debug_preserved; 151 152 /* Don't run the guest */ 153 bool pause; 154 155 /* IO related fields */ 156 struct kvm_decode mmio_decode; 157 158 /* Interrupt related fields */ 159 u64 irq_lines; /* IRQ and FIQ levels */ 160 161 /* Cache some mmu pages needed inside spinlock regions */ 162 struct kvm_mmu_memory_cache mmu_page_cache; 163 164 /* Target CPU and feature flags */ 165 int target; 166 DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES); 167 168 /* Detect first run of a vcpu */ 169 bool has_run_once; 170 }; 171 172 #define vcpu_gp_regs(v) (&(v)->arch.ctxt.gp_regs) 173 #define vcpu_sys_reg(v,r) ((v)->arch.ctxt.sys_regs[(r)]) 174 /* 175 * CP14 and CP15 live in the same array, as they are backed by the 176 * same system registers. 177 */ 178 #define vcpu_cp14(v,r) ((v)->arch.ctxt.copro[(r)]) 179 #define vcpu_cp15(v,r) ((v)->arch.ctxt.copro[(r)]) 180 181 #ifdef CONFIG_CPU_BIG_ENDIAN 182 #define vcpu_cp15_64_high(v,r) vcpu_cp15((v),(r)) 183 #define vcpu_cp15_64_low(v,r) vcpu_cp15((v),(r) + 1) 184 #else 185 #define vcpu_cp15_64_high(v,r) vcpu_cp15((v),(r) + 1) 186 #define vcpu_cp15_64_low(v,r) vcpu_cp15((v),(r)) 187 #endif 188 189 struct kvm_vm_stat { 190 u32 remote_tlb_flush; 191 }; 192 193 struct kvm_vcpu_stat { 194 u32 halt_successful_poll; 195 u32 halt_attempted_poll; 196 u32 halt_wakeup; 197 }; 198 199 int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init); 200 unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu); 201 int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices); 202 int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); 203 int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); 204 205 #define KVM_ARCH_WANT_MMU_NOTIFIER 206 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); 207 int kvm_unmap_hva_range(struct kvm *kvm, 208 unsigned long start, unsigned long end); 209 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); 210 int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end); 211 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva); 212 213 /* We do not have shadow page tables, hence the empty hooks */ 214 static inline void kvm_arch_mmu_notifier_invalidate_page(struct kvm *kvm, 215 unsigned long address) 216 { 217 } 218 219 struct kvm_vcpu *kvm_arm_get_running_vcpu(void); 220 struct kvm_vcpu * __percpu *kvm_get_running_vcpus(void); 221 222 u64 kvm_call_hyp(void *hypfn, ...); 223 void force_vm_exit(const cpumask_t *mask); 224 void kvm_mmu_wp_memory_region(struct kvm *kvm, int slot); 225 226 int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run, 227 int exception_index); 228 229 int kvm_perf_init(void); 230 int kvm_perf_teardown(void); 231 232 struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr); 233 234 static inline void __cpu_init_hyp_mode(phys_addr_t boot_pgd_ptr, 235 phys_addr_t pgd_ptr, 236 unsigned long hyp_stack_ptr, 237 unsigned long vector_ptr) 238 { 239 /* 240 * Call initialization code, and switch to the full blown 241 * HYP code. 242 */ 243 kvm_call_hyp((void *)boot_pgd_ptr, pgd_ptr, 244 hyp_stack_ptr, vector_ptr); 245 } 246 247 static inline void kvm_arch_hardware_disable(void) {} 248 static inline void kvm_arch_hardware_unsetup(void) {} 249 static inline void kvm_arch_sync_events(struct kvm *kvm) {} 250 static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {} 251 static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {} 252 253 void kvm_arm_init_debug(void); 254 void kvm_arm_setup_debug(struct kvm_vcpu *vcpu); 255 void kvm_arm_clear_debug(struct kvm_vcpu *vcpu); 256 void kvm_arm_reset_debug_ptr(struct kvm_vcpu *vcpu); 257 258 #endif /* __ARM64_KVM_HOST_H__ */ 259