1/* 2 * Copyright (C) 2012 - Virtual Open Systems and Columbia University 3 * Author: Christoffer Dall <c.dall@virtualopensystems.com> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License, version 2, as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 17 */ 18 19#ifndef __ARM_KVM_HOST_H__ 20#define __ARM_KVM_HOST_H__ 21 22#include <linux/types.h> 23#include <linux/kvm_types.h> 24#include <asm/kvm.h> 25#include <asm/kvm_asm.h> 26#include <asm/kvm_mmio.h> 27#include <asm/fpstate.h> 28#include <kvm/arm_arch_timer.h> 29 30#define __KVM_HAVE_ARCH_INTC_INITIALIZED 31 32#define KVM_USER_MEM_SLOTS 32 33#define KVM_PRIVATE_MEM_SLOTS 4 34#define KVM_COALESCED_MMIO_PAGE_OFFSET 1 35#define KVM_HAVE_ONE_REG 36#define KVM_HALT_POLL_NS_DEFAULT 500000 37 38#define KVM_VCPU_MAX_FEATURES 2 39 40#include <kvm/arm_vgic.h> 41 42#define KVM_MAX_VCPUS VGIC_V2_MAX_CPUS 43 44u32 *kvm_vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num, u32 mode); 45int __attribute_const__ kvm_target_cpu(void); 46int kvm_reset_vcpu(struct kvm_vcpu *vcpu); 47void kvm_reset_coprocs(struct kvm_vcpu *vcpu); 48 49struct kvm_arch { 50 /* VTTBR value associated with below pgd and vmid */ 51 u64 vttbr; 52 53 /* Timer */ 54 struct arch_timer_kvm timer; 55 56 /* 57 * Anything that is not used directly from assembly code goes 58 * here. 59 */ 60 61 /* The VMID generation used for the virt. memory system */ 62 u64 vmid_gen; 63 u32 vmid; 64 65 /* Stage-2 page table */ 66 pgd_t *pgd; 67 68 /* Interrupt controller */ 69 struct vgic_dist vgic; 70 int max_vcpus; 71}; 72 73#define KVM_NR_MEM_OBJS 40 74 75/* 76 * We don't want allocation failures within the mmu code, so we preallocate 77 * enough memory for a single page fault in a cache. 78 */ 79struct kvm_mmu_memory_cache { 80 int nobjs; 81 void *objects[KVM_NR_MEM_OBJS]; 82}; 83 84struct kvm_vcpu_fault_info { 85 u32 hsr; /* Hyp Syndrome Register */ 86 u32 hxfar; /* Hyp Data/Inst. Fault Address Register */ 87 u32 hpfar; /* Hyp IPA Fault Address Register */ 88 u32 hyp_pc; /* PC when exception was taken from Hyp mode */ 89}; 90 91typedef struct vfp_hard_struct kvm_cpu_context_t; 92 93struct kvm_vcpu_arch { 94 struct kvm_regs regs; 95 96 int target; /* Processor target */ 97 DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES); 98 99 /* System control coprocessor (cp15) */ 100 u32 cp15[NR_CP15_REGS]; 101 102 /* The CPU type we expose to the VM */ 103 u32 midr; 104 105 /* HYP trapping configuration */ 106 u32 hcr; 107 108 /* Interrupt related fields */ 109 u32 irq_lines; /* IRQ and FIQ levels */ 110 111 /* Exception Information */ 112 struct kvm_vcpu_fault_info fault; 113 114 /* Floating point registers (VFP and Advanced SIMD/NEON) */ 115 struct vfp_hard_struct vfp_guest; 116 117 /* Host FP context */ 118 kvm_cpu_context_t *host_cpu_context; 119 120 /* VGIC state */ 121 struct vgic_cpu vgic_cpu; 122 struct arch_timer_cpu timer_cpu; 123 124 /* 125 * Anything that is not used directly from assembly code goes 126 * here. 127 */ 128 129 /* vcpu power-off state */ 130 bool power_off; 131 132 /* Don't run the guest (internal implementation need) */ 133 bool pause; 134 135 /* IO related fields */ 136 struct kvm_decode mmio_decode; 137 138 /* Cache some mmu pages needed inside spinlock regions */ 139 struct kvm_mmu_memory_cache mmu_page_cache; 140 141 /* Detect first run of a vcpu */ 142 bool has_run_once; 143}; 144 145struct kvm_vm_stat { 146 u32 remote_tlb_flush; 147}; 148 149struct kvm_vcpu_stat { 150 u32 halt_successful_poll; 151 u32 halt_attempted_poll; 152 u32 halt_wakeup; 153}; 154 155int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init); 156unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu); 157int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices); 158int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); 159int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); 160u64 kvm_call_hyp(void *hypfn, ...); 161void force_vm_exit(const cpumask_t *mask); 162 163#define KVM_ARCH_WANT_MMU_NOTIFIER 164int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); 165int kvm_unmap_hva_range(struct kvm *kvm, 166 unsigned long start, unsigned long end); 167void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); 168 169unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu); 170int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices); 171int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end); 172int kvm_test_age_hva(struct kvm *kvm, unsigned long hva); 173 174/* We do not have shadow page tables, hence the empty hooks */ 175static inline void kvm_arch_mmu_notifier_invalidate_page(struct kvm *kvm, 176 unsigned long address) 177{ 178} 179 180struct kvm_vcpu *kvm_arm_get_running_vcpu(void); 181struct kvm_vcpu __percpu **kvm_get_running_vcpus(void); 182 183int kvm_arm_copy_coproc_indices(struct kvm_vcpu *vcpu, u64 __user *uindices); 184unsigned long kvm_arm_num_coproc_regs(struct kvm_vcpu *vcpu); 185int kvm_arm_coproc_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *); 186int kvm_arm_coproc_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *); 187 188int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run, 189 int exception_index); 190 191static inline void __cpu_init_hyp_mode(phys_addr_t boot_pgd_ptr, 192 phys_addr_t pgd_ptr, 193 unsigned long hyp_stack_ptr, 194 unsigned long vector_ptr) 195{ 196 /* 197 * Call initialization code, and switch to the full blown HYP 198 * code. The init code doesn't need to preserve these 199 * registers as r0-r3 are already callee saved according to 200 * the AAPCS. 201 * Note that we slightly misuse the prototype by casing the 202 * stack pointer to a void *. 203 * 204 * We don't have enough registers to perform the full init in 205 * one go. Install the boot PGD first, and then install the 206 * runtime PGD, stack pointer and vectors. The PGDs are always 207 * passed as the third argument, in order to be passed into 208 * r2-r3 to the init code (yes, this is compliant with the 209 * PCS!). 210 */ 211 212 kvm_call_hyp(NULL, 0, boot_pgd_ptr); 213 214 kvm_call_hyp((void*)hyp_stack_ptr, vector_ptr, pgd_ptr); 215} 216 217static inline int kvm_arch_dev_ioctl_check_extension(long ext) 218{ 219 return 0; 220} 221 222int kvm_perf_init(void); 223int kvm_perf_teardown(void); 224 225void kvm_mmu_wp_memory_region(struct kvm *kvm, int slot); 226 227struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr); 228 229static inline void kvm_arch_hardware_disable(void) {} 230static inline void kvm_arch_hardware_unsetup(void) {} 231static inline void kvm_arch_sync_events(struct kvm *kvm) {} 232static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {} 233static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {} 234 235static inline void kvm_arm_init_debug(void) {} 236static inline void kvm_arm_setup_debug(struct kvm_vcpu *vcpu) {} 237static inline void kvm_arm_clear_debug(struct kvm_vcpu *vcpu) {} 238static inline void kvm_arm_reset_debug_ptr(struct kvm_vcpu *vcpu) {} 239 240#endif /* __ARM_KVM_HOST_H__ */ 241