arch/arm64/include/asm/kvm_host.h

   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__ */