1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) 2019 Western Digital Corporation or its affiliates. 4 * 5 * Authors: 6 * Anup Patel <anup.patel@wdc.com> 7 */ 8 9 #ifndef __RISCV_KVM_HOST_H__ 10 #define __RISCV_KVM_HOST_H__ 11 12 #include <linux/types.h> 13 #include <linux/kvm.h> 14 #include <linux/kvm_types.h> 15 #include <linux/spinlock.h> 16 #include <asm/hwcap.h> 17 #include <asm/kvm_aia.h> 18 #include <asm/ptrace.h> 19 #include <asm/kvm_tlb.h> 20 #include <asm/kvm_vmid.h> 21 #include <asm/kvm_vcpu_config.h> 22 #include <asm/kvm_vcpu_fp.h> 23 #include <asm/kvm_vcpu_insn.h> 24 #include <asm/kvm_vcpu_sbi.h> 25 #include <asm/kvm_vcpu_sbi_fwft.h> 26 #include <asm/kvm_vcpu_timer.h> 27 #include <asm/kvm_vcpu_pmu.h> 28 29 #define KVM_MAX_VCPUS 1024 30 31 #define KVM_HALT_POLL_NS_DEFAULT 500000 32 33 #define KVM_VCPU_MAX_FEATURES 0 34 35 #define KVM_IRQCHIP_NUM_PINS 1024 36 37 #define KVM_REQ_SLEEP \ 38 KVM_ARCH_REQ_FLAGS(0, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP) 39 #define KVM_REQ_VCPU_RESET KVM_ARCH_REQ(1) 40 #define KVM_REQ_UPDATE_HGATP KVM_ARCH_REQ(2) 41 #define KVM_REQ_FENCE_I \ 42 KVM_ARCH_REQ_FLAGS(3, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP) 43 #define KVM_REQ_HFENCE_VVMA_ALL \ 44 KVM_ARCH_REQ_FLAGS(4, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP) 45 #define KVM_REQ_HFENCE \ 46 KVM_ARCH_REQ_FLAGS(5, KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP) 47 #define KVM_REQ_STEAL_UPDATE KVM_ARCH_REQ(6) 48 49 #define __KVM_HAVE_ARCH_FLUSH_REMOTE_TLBS_RANGE 50 51 #define KVM_HAVE_MMU_RWLOCK 52 53 #define KVM_DIRTY_LOG_MANUAL_CAPS (KVM_DIRTY_LOG_MANUAL_PROTECT_ENABLE | \ 54 KVM_DIRTY_LOG_INITIALLY_SET) 55 56 struct kvm_vm_stat { 57 struct kvm_vm_stat_generic generic; 58 }; 59 60 struct kvm_vcpu_stat { 61 struct kvm_vcpu_stat_generic generic; 62 u64 ecall_exit_stat; 63 u64 wfi_exit_stat; 64 u64 wrs_exit_stat; 65 u64 mmio_exit_user; 66 u64 mmio_exit_kernel; 67 u64 csr_exit_user; 68 u64 csr_exit_kernel; 69 u64 signal_exits; 70 u64 exits; 71 u64 instr_illegal_exits; 72 u64 load_misaligned_exits; 73 u64 store_misaligned_exits; 74 u64 load_access_exits; 75 u64 store_access_exits; 76 }; 77 78 struct kvm_arch_memory_slot { 79 }; 80 81 struct kvm_arch { 82 /* G-stage vmid */ 83 struct kvm_vmid vmid; 84 85 /* G-stage page table */ 86 pgd_t *pgd; 87 phys_addr_t pgd_phys; 88 unsigned long pgd_levels; 89 struct kvm_mmu_memory_cache pgd_split_page_cache; 90 91 /* Guest Timer */ 92 struct kvm_guest_timer timer; 93 94 /* AIA Guest/VM context */ 95 struct kvm_aia aia; 96 97 /* KVM_CAP_RISCV_MP_STATE_RESET */ 98 bool mp_state_reset; 99 }; 100 101 struct kvm_cpu_trap { 102 unsigned long sepc; 103 unsigned long scause; 104 unsigned long stval; 105 unsigned long htval; 106 unsigned long htinst; 107 }; 108 109 struct kvm_cpu_context { 110 unsigned long zero; 111 unsigned long ra; 112 unsigned long sp; 113 unsigned long gp; 114 unsigned long tp; 115 unsigned long t0; 116 unsigned long t1; 117 unsigned long t2; 118 unsigned long s0; 119 unsigned long s1; 120 unsigned long a0; 121 unsigned long a1; 122 unsigned long a2; 123 unsigned long a3; 124 unsigned long a4; 125 unsigned long a5; 126 unsigned long a6; 127 unsigned long a7; 128 unsigned long s2; 129 unsigned long s3; 130 unsigned long s4; 131 unsigned long s5; 132 unsigned long s6; 133 unsigned long s7; 134 unsigned long s8; 135 unsigned long s9; 136 unsigned long s10; 137 unsigned long s11; 138 unsigned long t3; 139 unsigned long t4; 140 unsigned long t5; 141 unsigned long t6; 142 unsigned long sepc; 143 unsigned long sstatus; 144 unsigned long hstatus; 145 union __riscv_fp_state fp; 146 struct __riscv_v_ext_state vector; 147 }; 148 149 struct kvm_vcpu_csr { 150 unsigned long vsstatus; 151 unsigned long vsie; 152 unsigned long vstvec; 153 unsigned long vsscratch; 154 unsigned long vsepc; 155 unsigned long vscause; 156 unsigned long vstval; 157 unsigned long hvip; 158 unsigned long vsatp; 159 unsigned long scounteren; 160 unsigned long senvcfg; 161 }; 162 163 struct kvm_vcpu_smstateen_csr { 164 unsigned long sstateen0; 165 }; 166 167 struct kvm_vcpu_zicfiss_csr { 168 unsigned long ssp; 169 }; 170 171 struct kvm_vcpu_reset_state { 172 spinlock_t lock; 173 unsigned long pc; 174 unsigned long a1; 175 }; 176 177 struct kvm_vcpu_arch { 178 /* VCPU ran at least once */ 179 bool ran_atleast_once; 180 181 /* Last Host CPU on which Guest VCPU exited */ 182 int last_exit_cpu; 183 184 /* ISA feature bits (similar to MISA) */ 185 DECLARE_BITMAP(isa, RISCV_ISA_EXT_MAX); 186 187 /* Vendor, Arch, and Implementation details */ 188 unsigned long mvendorid; 189 unsigned long marchid; 190 unsigned long mimpid; 191 192 /* SSCRATCH, STVEC, and SCOUNTEREN of Host */ 193 unsigned long host_sscratch; 194 unsigned long host_stvec; 195 unsigned long host_scounteren; 196 unsigned long host_senvcfg; 197 unsigned long host_sstateen0; 198 199 /* CPU context of Host */ 200 struct kvm_cpu_context host_context; 201 202 /* CPU context of Guest VCPU */ 203 struct kvm_cpu_context guest_context; 204 205 /* CPU CSR context of Guest VCPU */ 206 struct kvm_vcpu_csr guest_csr; 207 208 /* CPU Smstateen CSR context of Guest VCPU */ 209 struct kvm_vcpu_smstateen_csr smstateen_csr; 210 211 /* CPU Zicfiss CSR context of Guest VCPU */ 212 struct kvm_vcpu_zicfiss_csr zicfiss_csr; 213 214 /* CPU reset state of Guest VCPU */ 215 struct kvm_vcpu_reset_state reset_state; 216 217 /* 218 * VCPU interrupts 219 * 220 * The irqs_pending bitmap represents pending interrupts whereas 221 * irqs_pending_mask represents bits changed in irqs_pending. Updates 222 * to these bitmaps are serialized so vcpu interrupt sync/flush cannot 223 * drop a newly injected interrupt while syncing guest-visible HVIP. 224 */ 225 #define KVM_RISCV_VCPU_NR_IRQS 64 226 raw_spinlock_t irqs_pending_lock; 227 DECLARE_BITMAP(irqs_pending, KVM_RISCV_VCPU_NR_IRQS); 228 DECLARE_BITMAP(irqs_pending_mask, KVM_RISCV_VCPU_NR_IRQS); 229 230 /* VCPU Timer */ 231 struct kvm_vcpu_timer timer; 232 233 /* HFENCE request queue */ 234 spinlock_t hfence_lock; 235 unsigned long hfence_head; 236 unsigned long hfence_tail; 237 struct kvm_riscv_hfence hfence_queue[KVM_RISCV_VCPU_MAX_HFENCE]; 238 239 /* MMIO instruction details */ 240 struct kvm_mmio_decode mmio_decode; 241 242 /* CSR instruction details */ 243 struct kvm_csr_decode csr_decode; 244 245 /* SBI context */ 246 struct kvm_vcpu_sbi_context sbi_context; 247 248 /* AIA VCPU context */ 249 struct kvm_vcpu_aia aia_context; 250 251 /* Cache pages needed to program page tables with spinlock held */ 252 struct kvm_mmu_memory_cache mmu_page_cache; 253 254 /* VCPU power state */ 255 struct kvm_mp_state mp_state; 256 spinlock_t mp_state_lock; 257 258 /* Don't run the VCPU (blocked) */ 259 bool pause; 260 261 /* Performance monitoring context */ 262 struct kvm_pmu pmu_context; 263 264 /* Firmware feature SBI extension context */ 265 struct kvm_sbi_fwft fwft_context; 266 267 /* 'static' configurations which are set only once */ 268 struct kvm_vcpu_config cfg; 269 270 /* Indicates modified guest CSRs */ 271 bool csr_dirty; 272 273 /* SBI steal-time accounting */ 274 struct { 275 gpa_t shmem; 276 u64 last_steal; 277 } sta; 278 }; 279 280 /* 281 * Returns true if a Performance Monitoring Interrupt (PMI), a.k.a. perf event, 282 * arrived in guest context. For riscv, any event that arrives while a vCPU is 283 * loaded is considered to be "in guest". 284 */ 285 static inline bool kvm_arch_pmi_in_guest(struct kvm_vcpu *vcpu) 286 { 287 return IS_ENABLED(CONFIG_GUEST_PERF_EVENTS) && !!vcpu; 288 } 289 290 static inline void kvm_arch_vcpu_blocking(struct kvm_vcpu *vcpu) {} 291 static inline void kvm_arch_vcpu_unblocking(struct kvm_vcpu *vcpu) {} 292 293 void kvm_riscv_clear_former_vcpu(void); 294 295 int kvm_riscv_setup_default_irq_routing(struct kvm *kvm, u32 lines); 296 297 void __kvm_riscv_unpriv_trap(void); 298 299 unsigned long kvm_riscv_vcpu_unpriv_read(struct kvm_vcpu *vcpu, 300 bool read_insn, 301 unsigned long guest_addr, 302 struct kvm_cpu_trap *trap); 303 void kvm_riscv_vcpu_trap_redirect(struct kvm_vcpu *vcpu, 304 struct kvm_cpu_trap *trap); 305 int kvm_riscv_vcpu_exit(struct kvm_vcpu *vcpu, struct kvm_run *run, 306 struct kvm_cpu_trap *trap); 307 308 void __kvm_riscv_switch_to(struct kvm_vcpu_arch *vcpu_arch); 309 310 void kvm_riscv_vcpu_setup_isa(struct kvm_vcpu *vcpu); 311 unsigned long kvm_riscv_vcpu_num_regs(struct kvm_vcpu *vcpu); 312 int kvm_riscv_vcpu_copy_reg_indices(struct kvm_vcpu *vcpu, 313 u64 __user *uindices); 314 int kvm_riscv_vcpu_get_reg(struct kvm_vcpu *vcpu, 315 const struct kvm_one_reg *reg); 316 int kvm_riscv_vcpu_set_reg(struct kvm_vcpu *vcpu, 317 const struct kvm_one_reg *reg); 318 319 int kvm_riscv_vcpu_set_interrupt(struct kvm_vcpu *vcpu, unsigned int irq); 320 int kvm_riscv_vcpu_unset_interrupt(struct kvm_vcpu *vcpu, unsigned int irq); 321 void kvm_riscv_vcpu_flush_interrupts(struct kvm_vcpu *vcpu); 322 void kvm_riscv_vcpu_sync_interrupts(struct kvm_vcpu *vcpu); 323 bool kvm_riscv_vcpu_has_interrupts(struct kvm_vcpu *vcpu, u64 mask); 324 void __kvm_riscv_vcpu_power_off(struct kvm_vcpu *vcpu); 325 void kvm_riscv_vcpu_power_off(struct kvm_vcpu *vcpu); 326 void __kvm_riscv_vcpu_power_on(struct kvm_vcpu *vcpu); 327 void kvm_riscv_vcpu_power_on(struct kvm_vcpu *vcpu); 328 bool kvm_riscv_vcpu_stopped(struct kvm_vcpu *vcpu); 329 330 void kvm_riscv_vcpu_record_steal_time(struct kvm_vcpu *vcpu); 331 332 /* Flags representing implementation specific details */ 333 DECLARE_STATIC_KEY_FALSE(kvm_riscv_vsstage_tlb_no_gpa); 334 335 #endif /* __RISCV_KVM_HOST_H__ */ 336