Marc Zyngier | 4f8d663 | 2012-12-10 16:29:28 +0000 | [diff] [blame] | 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 | |
Marc Zyngier | 0d854a6 | 2013-02-07 10:46:46 +0000 | [diff] [blame] | 37 | #define KVM_VCPU_MAX_FEATURES 2 |
Marc Zyngier | 4f8d663 | 2012-12-10 16:29:28 +0000 | [diff] [blame] | 38 | |
| 39 | /* We don't currently support large pages. */ |
| 40 | #define KVM_HPAGE_GFN_SHIFT(x) 0 |
| 41 | #define KVM_NR_PAGE_SIZES 1 |
| 42 | #define KVM_PAGES_PER_HPAGE(x) (1UL<<31) |
| 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; |
Marc Zyngier | 40033a6 | 2013-02-06 19:17:50 +0000 | [diff] [blame] | 87 | union { |
| 88 | u64 sys_regs[NR_SYS_REGS]; |
| 89 | u32 cp15[NR_CP15_REGS]; |
| 90 | }; |
Marc Zyngier | 4f8d663 | 2012-12-10 16:29:28 +0000 | [diff] [blame] | 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 */ |
Chen Gang | 6c8c0c4 | 2013-07-22 04:40:38 +0100 | [diff] [blame^] | 132 | int target; |
Marc Zyngier | 4f8d663 | 2012-12-10 16:29:28 +0000 | [diff] [blame] | 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 | unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu); |
| 155 | int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices); |
| 156 | struct kvm_one_reg; |
| 157 | int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); |
| 158 | int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); |
| 159 | |
| 160 | #define KVM_ARCH_WANT_MMU_NOTIFIER |
| 161 | struct kvm; |
| 162 | int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); |
| 163 | int kvm_unmap_hva_range(struct kvm *kvm, |
| 164 | unsigned long start, unsigned long end); |
| 165 | void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); |
| 166 | |
| 167 | /* We do not have shadow page tables, hence the empty hooks */ |
| 168 | static inline int kvm_age_hva(struct kvm *kvm, unsigned long hva) |
| 169 | { |
| 170 | return 0; |
| 171 | } |
| 172 | |
| 173 | static inline int kvm_test_age_hva(struct kvm *kvm, unsigned long hva) |
| 174 | { |
| 175 | return 0; |
| 176 | } |
| 177 | |
| 178 | struct kvm_vcpu *kvm_arm_get_running_vcpu(void); |
| 179 | struct kvm_vcpu __percpu **kvm_get_running_vcpus(void); |
| 180 | |
| 181 | u64 kvm_call_hyp(void *hypfn, ...); |
| 182 | |
| 183 | int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run, |
| 184 | int exception_index); |
| 185 | |
| 186 | int kvm_perf_init(void); |
| 187 | int kvm_perf_teardown(void); |
| 188 | |
Marc Zyngier | 092bd14 | 2012-12-17 17:07:52 +0000 | [diff] [blame] | 189 | static inline void __cpu_init_hyp_mode(phys_addr_t boot_pgd_ptr, |
| 190 | phys_addr_t pgd_ptr, |
| 191 | unsigned long hyp_stack_ptr, |
| 192 | unsigned long vector_ptr) |
| 193 | { |
| 194 | /* |
| 195 | * Call initialization code, and switch to the full blown |
| 196 | * HYP code. |
| 197 | */ |
| 198 | kvm_call_hyp((void *)boot_pgd_ptr, pgd_ptr, |
| 199 | hyp_stack_ptr, vector_ptr); |
| 200 | } |
| 201 | |
Marc Zyngier | 4f8d663 | 2012-12-10 16:29:28 +0000 | [diff] [blame] | 202 | #endif /* __ARM64_KVM_HOST_H__ */ |