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; 106 107 /* Exception Information */ 108 struct kvm_vcpu_fault_info fault; 109 110 /* Debug state */ 111 u64 debug_flags; 112 113 /* Pointer to host CPU context */ 114 kvm_cpu_context_t *host_cpu_context; 115 116 /* VGIC state */ 117 struct vgic_cpu vgic_cpu; 118 struct arch_timer_cpu timer_cpu; 119 120 /* 121 * Anything that is not used directly from assembly code goes 122 * here. 123 */ 124 125 /* Don't run the guest */ 126 bool pause; 127 128 /* IO related fields */ 129 struct kvm_decode mmio_decode; 130 131 /* Interrupt related fields */ 132 u64 irq_lines; /* IRQ and FIQ levels */ 133 134 /* Cache some mmu pages needed inside spinlock regions */ 135 struct kvm_mmu_memory_cache mmu_page_cache; 136 137 /* Target CPU and feature flags */ 138 int target; 139 DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES); 140 141 /* Detect first run of a vcpu */ 142 bool has_run_once; 143 }; 144 145 #define vcpu_gp_regs(v) (&(v)->arch.ctxt.gp_regs) 146 #define vcpu_sys_reg(v,r) ((v)->arch.ctxt.sys_regs[(r)]) 147 /* 148 * CP14 and CP15 live in the same array, as they are backed by the 149 * same system registers. 150 */ 151 #define vcpu_cp14(v,r) ((v)->arch.ctxt.copro[(r)]) 152 #define vcpu_cp15(v,r) ((v)->arch.ctxt.copro[(r)]) 153 154 #ifdef CONFIG_CPU_BIG_ENDIAN 155 #define vcpu_cp15_64_high(v,r) vcpu_cp15((v),(r)) 156 #define vcpu_cp15_64_low(v,r) vcpu_cp15((v),(r) + 1) 157 #else 158 #define vcpu_cp15_64_high(v,r) vcpu_cp15((v),(r) + 1) 159 #define vcpu_cp15_64_low(v,r) vcpu_cp15((v),(r)) 160 #endif 161 162 struct kvm_vm_stat { 163 u32 remote_tlb_flush; 164 }; 165 166 struct kvm_vcpu_stat { 167 u32 halt_successful_poll; 168 u32 halt_wakeup; 169 }; 170 171 int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init); 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); 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 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 int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end); 183 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva); 184 185 /* We do not have shadow page tables, hence the empty hooks */ 186 static inline void kvm_arch_mmu_notifier_invalidate_page(struct kvm *kvm, 187 unsigned long address) 188 { 189 } 190 191 struct kvm_vcpu *kvm_arm_get_running_vcpu(void); 192 struct kvm_vcpu * __percpu *kvm_get_running_vcpus(void); 193 194 u64 kvm_call_hyp(void *hypfn, ...); 195 void force_vm_exit(const cpumask_t *mask); 196 void kvm_mmu_wp_memory_region(struct kvm *kvm, int slot); 197 198 int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run, 199 int exception_index); 200 201 int kvm_perf_init(void); 202 int kvm_perf_teardown(void); 203 204 struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr); 205 206 static inline void __cpu_init_hyp_mode(phys_addr_t boot_pgd_ptr, 207 phys_addr_t pgd_ptr, 208 unsigned long hyp_stack_ptr, 209 unsigned long vector_ptr) 210 { 211 /* 212 * Call initialization code, and switch to the full blown 213 * HYP code. 214 */ 215 kvm_call_hyp((void *)boot_pgd_ptr, pgd_ptr, 216 hyp_stack_ptr, vector_ptr); 217 } 218 219 struct vgic_sr_vectors { 220 void *save_vgic; 221 void *restore_vgic; 222 }; 223 224 static inline void kvm_arch_hardware_disable(void) {} 225 static inline void kvm_arch_hardware_unsetup(void) {} 226 static inline void kvm_arch_sync_events(struct kvm *kvm) {} 227 static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {} 228 static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {} 229 230 #endif /* __ARM64_KVM_HOST_H__ */ 231