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 #define KVM_MAX_VCPUS 4 30 #define KVM_USER_MEM_SLOTS 32 31 #define KVM_PRIVATE_MEM_SLOTS 4 32 #define KVM_COALESCED_MMIO_PAGE_OFFSET 1 33 34 #include <kvm/arm_vgic.h> 35 #include <kvm/arm_arch_timer.h> 36 37 #define KVM_VCPU_MAX_FEATURES 2 38 39 struct kvm_vcpu; 40 int kvm_target_cpu(void); 41 int kvm_reset_vcpu(struct kvm_vcpu *vcpu); 42 int kvm_arch_dev_ioctl_check_extension(long ext); 43 44 struct kvm_arch { 45 /* The VMID generation used for the virt. memory system */ 46 u64 vmid_gen; 47 u32 vmid; 48 49 /* 1-level 2nd stage table and lock */ 50 spinlock_t pgd_lock; 51 pgd_t *pgd; 52 53 /* VTTBR value associated with above pgd and vmid */ 54 u64 vttbr; 55 56 /* Interrupt controller */ 57 struct vgic_dist vgic; 58 59 /* Timer */ 60 struct arch_timer_kvm timer; 61 }; 62 63 #define KVM_NR_MEM_OBJS 40 64 65 /* 66 * We don't want allocation failures within the mmu code, so we preallocate 67 * enough memory for a single page fault in a cache. 68 */ 69 struct kvm_mmu_memory_cache { 70 int nobjs; 71 void *objects[KVM_NR_MEM_OBJS]; 72 }; 73 74 struct kvm_vcpu_fault_info { 75 u32 esr_el2; /* Hyp Syndrom Register */ 76 u64 far_el2; /* Hyp Fault Address Register */ 77 u64 hpfar_el2; /* Hyp IPA Fault Address Register */ 78 }; 79 80 struct kvm_cpu_context { 81 struct kvm_regs gp_regs; 82 union { 83 u64 sys_regs[NR_SYS_REGS]; 84 u32 cp15[NR_CP15_REGS]; 85 }; 86 }; 87 88 typedef struct kvm_cpu_context kvm_cpu_context_t; 89 90 struct kvm_vcpu_arch { 91 struct kvm_cpu_context ctxt; 92 93 /* HYP configuration */ 94 u64 hcr_el2; 95 96 /* Exception Information */ 97 struct kvm_vcpu_fault_info fault; 98 99 /* Pointer to host CPU context */ 100 kvm_cpu_context_t *host_cpu_context; 101 102 /* VGIC state */ 103 struct vgic_cpu vgic_cpu; 104 struct arch_timer_cpu timer_cpu; 105 106 /* 107 * Anything that is not used directly from assembly code goes 108 * here. 109 */ 110 /* dcache set/way operation pending */ 111 int last_pcpu; 112 cpumask_t require_dcache_flush; 113 114 /* Don't run the guest */ 115 bool pause; 116 117 /* IO related fields */ 118 struct kvm_decode mmio_decode; 119 120 /* Interrupt related fields */ 121 u64 irq_lines; /* IRQ and FIQ levels */ 122 123 /* Cache some mmu pages needed inside spinlock regions */ 124 struct kvm_mmu_memory_cache mmu_page_cache; 125 126 /* Target CPU and feature flags */ 127 int target; 128 DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES); 129 130 /* Detect first run of a vcpu */ 131 bool has_run_once; 132 }; 133 134 #define vcpu_gp_regs(v) (&(v)->arch.ctxt.gp_regs) 135 #define vcpu_sys_reg(v,r) ((v)->arch.ctxt.sys_regs[(r)]) 136 #define vcpu_cp15(v,r) ((v)->arch.ctxt.cp15[(r)]) 137 138 struct kvm_vm_stat { 139 u32 remote_tlb_flush; 140 }; 141 142 struct kvm_vcpu_stat { 143 u32 halt_wakeup; 144 }; 145 146 struct kvm_vcpu_init; 147 int kvm_vcpu_set_target(struct kvm_vcpu *vcpu, 148 const struct kvm_vcpu_init *init); 149 int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init); 150 unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu); 151 int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices); 152 struct kvm_one_reg; 153 int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); 154 int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); 155 156 #define KVM_ARCH_WANT_MMU_NOTIFIER 157 struct kvm; 158 int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); 159 int kvm_unmap_hva_range(struct kvm *kvm, 160 unsigned long start, unsigned long end); 161 void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); 162 163 /* We do not have shadow page tables, hence the empty hooks */ 164 static inline int kvm_age_hva(struct kvm *kvm, unsigned long hva) 165 { 166 return 0; 167 } 168 169 static inline int kvm_test_age_hva(struct kvm *kvm, unsigned long hva) 170 { 171 return 0; 172 } 173 174 struct kvm_vcpu *kvm_arm_get_running_vcpu(void); 175 struct kvm_vcpu __percpu **kvm_get_running_vcpus(void); 176 177 u64 kvm_call_hyp(void *hypfn, ...); 178 179 int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run, 180 int exception_index); 181 182 int kvm_perf_init(void); 183 int kvm_perf_teardown(void); 184 185 static inline void __cpu_init_hyp_mode(phys_addr_t boot_pgd_ptr, 186 phys_addr_t pgd_ptr, 187 unsigned long hyp_stack_ptr, 188 unsigned long vector_ptr) 189 { 190 /* 191 * Call initialization code, and switch to the full blown 192 * HYP code. 193 */ 194 kvm_call_hyp((void *)boot_pgd_ptr, pgd_ptr, 195 hyp_stack_ptr, vector_ptr); 196 } 197 198 #endif /* __ARM64_KVM_HOST_H__ */ 199