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 #if defined(CONFIG_KVM_ARM_MAX_VCPUS) 34 #define KVM_MAX_VCPUS CONFIG_KVM_ARM_MAX_VCPUS 35 #else 36 #define KVM_MAX_VCPUS 0 37 #endif 38 39 #define KVM_USER_MEM_SLOTS 32 40 #define KVM_PRIVATE_MEM_SLOTS 4 41 #define KVM_COALESCED_MMIO_PAGE_OFFSET 1 42 43 #include <kvm/arm_vgic.h> 44 #include <kvm/arm_arch_timer.h> 45 46 #define KVM_VCPU_MAX_FEATURES 3 47 48 int __attribute_const__ kvm_target_cpu(void); 49 int kvm_reset_vcpu(struct kvm_vcpu *vcpu); 50 int kvm_arch_dev_ioctl_check_extension(long ext); 51 52 struct kvm_arch { 53 /* The VMID generation used for the virt. memory system */ 54 u64 vmid_gen; 55 u32 vmid; 56 57 /* 1-level 2nd stage table and lock */ 58 spinlock_t pgd_lock; 59 pgd_t *pgd; 60 61 /* VTTBR value associated with above pgd and vmid */ 62 u64 vttbr; 63 64 /* The maximum number of vCPUs depends on the used GIC model */ 65 int max_vcpus; 66 67 /* Interrupt controller */ 68 struct vgic_dist vgic; 69 70 /* Timer */ 71 struct arch_timer_kvm timer; 72 }; 73 74 #define KVM_NR_MEM_OBJS 40 75 76 /* 77 * We don't want allocation failures within the mmu code, so we preallocate 78 * enough memory for a single page fault in a cache. 79 */ 80 struct kvm_mmu_memory_cache { 81 int nobjs; 82 void *objects[KVM_NR_MEM_OBJS]; 83 }; 84 85 struct kvm_vcpu_fault_info { 86 u32 esr_el2; /* Hyp Syndrom Register */ 87 u64 far_el2; /* Hyp Fault Address Register */ 88 u64 hpfar_el2; /* Hyp IPA Fault Address Register */ 89 }; 90 91 struct kvm_cpu_context { 92 struct kvm_regs gp_regs; 93 union { 94 u64 sys_regs[NR_SYS_REGS]; 95 u32 copro[NR_COPRO_REGS]; 96 }; 97 }; 98 99 typedef struct kvm_cpu_context kvm_cpu_context_t; 100 101 struct kvm_vcpu_arch { 102 struct kvm_cpu_context ctxt; 103 104 /* HYP configuration */ 105 u64 hcr_el2; 106 u32 mdcr_el2; 107 108 /* Exception Information */ 109 struct kvm_vcpu_fault_info fault; 110 111 /* Guest debug state */ 112 u64 debug_flags; 113 114 /* 115 * We maintain more than a single set of debug registers to support 116 * debugging the guest from the host and to maintain separate host and 117 * guest state during world switches. vcpu_debug_state are the debug 118 * registers of the vcpu as the guest sees them. host_debug_state are 119 * the host registers which are saved and restored during 120 * world switches. external_debug_state contains the debug 121 * values we want to debug the guest. This is set via the 122 * KVM_SET_GUEST_DEBUG ioctl. 123 * 124 * debug_ptr points to the set of debug registers that should be loaded 125 * onto the hardware when running the guest. 126 */ 127 struct kvm_guest_debug_arch *debug_ptr; 128 struct kvm_guest_debug_arch vcpu_debug_state; 129 struct kvm_guest_debug_arch external_debug_state; 130 131 /* Pointer to host CPU context */ 132 kvm_cpu_context_t *host_cpu_context; 133 struct kvm_guest_debug_arch host_debug_state; 134 135 /* VGIC state */ 136 struct vgic_cpu vgic_cpu; 137 struct arch_timer_cpu timer_cpu; 138 139 /* 140 * Anything that is not used directly from assembly code goes 141 * here. 142 */ 143 144 /* 145 * Guest registers we preserve during guest debugging. 146 * 147 * These shadow registers are updated by the kvm_handle_sys_reg 148 * trap handler if the guest accesses or updates them while we 149 * are using guest debug. 150 */ 151 struct { 152 u32 mdscr_el1; 153 } guest_debug_preserved; 154 155 /* Don't run the guest */ 156 bool pause; 157 158 /* IO related fields */ 159 struct kvm_decode mmio_decode; 160 161 /* Interrupt related fields */ 162 u64 irq_lines; /* IRQ and FIQ levels */ 163 164 /* Cache some mmu pages needed inside spinlock regions */ 165 struct kvm_mmu_memory_cache mmu_page_cache; 166 167 /* Target CPU and feature flags */ 168 int target; 169 DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES); 170 171 /* Detect first run of a vcpu */ 172 bool has_run_once; 173 }; 174 175 #define vcpu_gp_regs(v) (&(v)->arch.ctxt.gp_regs) 176 #define vcpu_sys_reg(v,r) ((v)->arch.ctxt.sys_regs[(r)]) 177 /* 178 * CP14 and CP15 live in the same array, as they are backed by the 179 * same system registers. 180 */ 181 #define vcpu_cp14(v,r) ((v)->arch.ctxt.copro[(r)]) 182 #define vcpu_cp15(v,r) ((v)->arch.ctxt.copro[(r)]) 183 184 #ifdef CONFIG_CPU_BIG_ENDIAN 185 #define vcpu_cp15_64_high(v,r) vcpu_cp15((v),(r)) 186 #define vcpu_cp15_64_low(v,r) vcpu_cp15((v),(r) + 1) 187 #else 188 #define vcpu_cp15_64_high(v,r) vcpu_cp15((v),(r) + 1) 189 #define vcpu_cp15_64_low(v,r) vcpu_cp15((v),(r)) 190 #endif 191 192 struct kvm_vm_stat { 193 u32 remote_tlb_flush; 194 }; 195 196 struct kvm_vcpu_stat { 197 u32 halt_successful_poll; 198 u32 halt_wakeup; 199 }; 200 201 int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init); 202 unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu); 203 int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices); 204 int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); 205 int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); 206 207 #define KVM_ARCH_WANT_MMU_NOTIFIER 208 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); 209 int kvm_unmap_hva_range(struct kvm *kvm, 210 unsigned long start, unsigned long end); 211 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); 212 int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end); 213 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva); 214 215 /* We do not have shadow page tables, hence the empty hooks */ 216 static inline void kvm_arch_mmu_notifier_invalidate_page(struct kvm *kvm, 217 unsigned long address) 218 { 219 } 220 221 struct kvm_vcpu *kvm_arm_get_running_vcpu(void); 222 struct kvm_vcpu * __percpu *kvm_get_running_vcpus(void); 223 224 u64 kvm_call_hyp(void *hypfn, ...); 225 void force_vm_exit(const cpumask_t *mask); 226 void kvm_mmu_wp_memory_region(struct kvm *kvm, int slot); 227 228 int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run, 229 int exception_index); 230 231 int kvm_perf_init(void); 232 int kvm_perf_teardown(void); 233 234 struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr); 235 236 static inline void __cpu_init_hyp_mode(phys_addr_t boot_pgd_ptr, 237 phys_addr_t pgd_ptr, 238 unsigned long hyp_stack_ptr, 239 unsigned long vector_ptr) 240 { 241 /* 242 * Call initialization code, and switch to the full blown 243 * HYP code. 244 */ 245 kvm_call_hyp((void *)boot_pgd_ptr, pgd_ptr, 246 hyp_stack_ptr, vector_ptr); 247 } 248 249 static inline void kvm_arch_hardware_disable(void) {} 250 static inline void kvm_arch_hardware_unsetup(void) {} 251 static inline void kvm_arch_sync_events(struct kvm *kvm) {} 252 static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {} 253 static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {} 254 255 void kvm_arm_init_debug(void); 256 void kvm_arm_setup_debug(struct kvm_vcpu *vcpu); 257 void kvm_arm_clear_debug(struct kvm_vcpu *vcpu); 258 void kvm_arm_reset_debug_ptr(struct kvm_vcpu *vcpu); 259 260 #endif /* __ARM64_KVM_HOST_H__ */ 261