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 <asm/kvm.h> 26 #include <asm/kvm_asm.h> 27 #include <asm/kvm_mmio.h> 28 29 #if defined(CONFIG_KVM_ARM_MAX_VCPUS) 30 #define KVM_MAX_VCPUS CONFIG_KVM_ARM_MAX_VCPUS 31 #else 32 #define KVM_MAX_VCPUS 0 33 #endif 34 35 #define KVM_USER_MEM_SLOTS 32 36 #define KVM_PRIVATE_MEM_SLOTS 4 37 #define KVM_COALESCED_MMIO_PAGE_OFFSET 1 38 39 #include <kvm/arm_vgic.h> 40 #include <kvm/arm_arch_timer.h> 41 42 #define KVM_VCPU_MAX_FEATURES 2 43 44 struct kvm_vcpu; 45 int 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 /* Interrupt controller */ 62 struct vgic_dist vgic; 63 64 /* Timer */ 65 struct arch_timer_kvm timer; 66 }; 67 68 #define KVM_NR_MEM_OBJS 40 69 70 /* 71 * We don't want allocation failures within the mmu code, so we preallocate 72 * enough memory for a single page fault in a cache. 73 */ 74 struct kvm_mmu_memory_cache { 75 int nobjs; 76 void *objects[KVM_NR_MEM_OBJS]; 77 }; 78 79 struct kvm_vcpu_fault_info { 80 u32 esr_el2; /* Hyp Syndrom Register */ 81 u64 far_el2; /* Hyp Fault Address Register */ 82 u64 hpfar_el2; /* Hyp IPA Fault Address Register */ 83 }; 84 85 struct kvm_cpu_context { 86 struct kvm_regs gp_regs; 87 union { 88 u64 sys_regs[NR_SYS_REGS]; 89 u32 cp15[NR_CP15_REGS]; 90 }; 91 }; 92 93 typedef struct kvm_cpu_context kvm_cpu_context_t; 94 95 struct kvm_vcpu_arch { 96 struct kvm_cpu_context ctxt; 97 98 /* HYP configuration */ 99 u64 hcr_el2; 100 101 /* Exception Information */ 102 struct kvm_vcpu_fault_info fault; 103 104 /* Pointer to host CPU context */ 105 kvm_cpu_context_t *host_cpu_context; 106 107 /* VGIC state */ 108 struct vgic_cpu vgic_cpu; 109 struct arch_timer_cpu timer_cpu; 110 111 /* 112 * Anything that is not used directly from assembly code goes 113 * here. 114 */ 115 /* dcache set/way operation pending */ 116 int last_pcpu; 117 cpumask_t require_dcache_flush; 118 119 /* Don't run the guest */ 120 bool pause; 121 122 /* IO related fields */ 123 struct kvm_decode mmio_decode; 124 125 /* Interrupt related fields */ 126 u64 irq_lines; /* IRQ and FIQ levels */ 127 128 /* Cache some mmu pages needed inside spinlock regions */ 129 struct kvm_mmu_memory_cache mmu_page_cache; 130 131 /* Target CPU and feature flags */ 132 int target; 133 DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES); 134 135 /* Detect first run of a vcpu */ 136 bool has_run_once; 137 }; 138 139 #define vcpu_gp_regs(v) (&(v)->arch.ctxt.gp_regs) 140 #define vcpu_sys_reg(v,r) ((v)->arch.ctxt.sys_regs[(r)]) 141 #define vcpu_cp15(v,r) ((v)->arch.ctxt.cp15[(r)]) 142 143 struct kvm_vm_stat { 144 u32 remote_tlb_flush; 145 }; 146 147 struct kvm_vcpu_stat { 148 u32 halt_wakeup; 149 }; 150 151 struct kvm_vcpu_init; 152 int kvm_vcpu_set_target(struct kvm_vcpu *vcpu, 153 const struct kvm_vcpu_init *init); 154 int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init); 155 unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu); 156 int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices); 157 struct kvm_one_reg; 158 int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); 159 int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); 160 161 #define KVM_ARCH_WANT_MMU_NOTIFIER 162 struct kvm; 163 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); 164 int kvm_unmap_hva_range(struct kvm *kvm, 165 unsigned long start, unsigned long end); 166 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); 167 168 /* We do not have shadow page tables, hence the empty hooks */ 169 static inline int kvm_age_hva(struct kvm *kvm, unsigned long hva) 170 { 171 return 0; 172 } 173 174 static inline int kvm_test_age_hva(struct kvm *kvm, unsigned long hva) 175 { 176 return 0; 177 } 178 179 struct kvm_vcpu *kvm_arm_get_running_vcpu(void); 180 struct kvm_vcpu __percpu **kvm_get_running_vcpus(void); 181 182 u64 kvm_call_hyp(void *hypfn, ...); 183 184 int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run, 185 int exception_index); 186 187 int kvm_perf_init(void); 188 int kvm_perf_teardown(void); 189 190 static inline void __cpu_init_hyp_mode(phys_addr_t boot_pgd_ptr, 191 phys_addr_t pgd_ptr, 192 unsigned long hyp_stack_ptr, 193 unsigned long vector_ptr) 194 { 195 /* 196 * Call initialization code, and switch to the full blown 197 * HYP code. 198 */ 199 kvm_call_hyp((void *)boot_pgd_ptr, pgd_ptr, 200 hyp_stack_ptr, vector_ptr); 201 } 202 203 #endif /* __ARM64_KVM_HOST_H__ */ 204