1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef ARCH_X86_KVM_X86_H 3 #define ARCH_X86_KVM_X86_H 4 5 #include <linux/kvm_host.h> 6 #include <asm/pvclock.h> 7 #include "kvm_cache_regs.h" 8 9 #define KVM_DEFAULT_PLE_GAP 128 10 #define KVM_VMX_DEFAULT_PLE_WINDOW 4096 11 #define KVM_DEFAULT_PLE_WINDOW_GROW 2 12 #define KVM_DEFAULT_PLE_WINDOW_SHRINK 0 13 #define KVM_VMX_DEFAULT_PLE_WINDOW_MAX UINT_MAX 14 #define KVM_SVM_DEFAULT_PLE_WINDOW_MAX USHRT_MAX 15 #define KVM_SVM_DEFAULT_PLE_WINDOW 3000 16 17 static inline unsigned int __grow_ple_window(unsigned int val, 18 unsigned int base, unsigned int modifier, unsigned int max) 19 { 20 u64 ret = val; 21 22 if (modifier < 1) 23 return base; 24 25 if (modifier < base) 26 ret *= modifier; 27 else 28 ret += modifier; 29 30 return min(ret, (u64)max); 31 } 32 33 static inline unsigned int __shrink_ple_window(unsigned int val, 34 unsigned int base, unsigned int modifier, unsigned int min) 35 { 36 if (modifier < 1) 37 return base; 38 39 if (modifier < base) 40 val /= modifier; 41 else 42 val -= modifier; 43 44 return max(val, min); 45 } 46 47 #define MSR_IA32_CR_PAT_DEFAULT 0x0007040600070406ULL 48 49 static inline void kvm_clear_exception_queue(struct kvm_vcpu *vcpu) 50 { 51 vcpu->arch.exception.pending = false; 52 vcpu->arch.exception.injected = false; 53 } 54 55 static inline void kvm_queue_interrupt(struct kvm_vcpu *vcpu, u8 vector, 56 bool soft) 57 { 58 vcpu->arch.interrupt.injected = true; 59 vcpu->arch.interrupt.soft = soft; 60 vcpu->arch.interrupt.nr = vector; 61 } 62 63 static inline void kvm_clear_interrupt_queue(struct kvm_vcpu *vcpu) 64 { 65 vcpu->arch.interrupt.injected = false; 66 } 67 68 static inline bool kvm_event_needs_reinjection(struct kvm_vcpu *vcpu) 69 { 70 return vcpu->arch.exception.injected || vcpu->arch.interrupt.injected || 71 vcpu->arch.nmi_injected; 72 } 73 74 static inline bool kvm_exception_is_soft(unsigned int nr) 75 { 76 return (nr == BP_VECTOR) || (nr == OF_VECTOR); 77 } 78 79 static inline bool is_protmode(struct kvm_vcpu *vcpu) 80 { 81 return kvm_read_cr0_bits(vcpu, X86_CR0_PE); 82 } 83 84 static inline int is_long_mode(struct kvm_vcpu *vcpu) 85 { 86 #ifdef CONFIG_X86_64 87 return vcpu->arch.efer & EFER_LMA; 88 #else 89 return 0; 90 #endif 91 } 92 93 static inline bool is_64_bit_mode(struct kvm_vcpu *vcpu) 94 { 95 int cs_db, cs_l; 96 97 if (!is_long_mode(vcpu)) 98 return false; 99 kvm_x86_ops->get_cs_db_l_bits(vcpu, &cs_db, &cs_l); 100 return cs_l; 101 } 102 103 static inline bool is_la57_mode(struct kvm_vcpu *vcpu) 104 { 105 #ifdef CONFIG_X86_64 106 return (vcpu->arch.efer & EFER_LMA) && 107 kvm_read_cr4_bits(vcpu, X86_CR4_LA57); 108 #else 109 return 0; 110 #endif 111 } 112 113 static inline bool x86_exception_has_error_code(unsigned int vector) 114 { 115 static u32 exception_has_error_code = BIT(DF_VECTOR) | BIT(TS_VECTOR) | 116 BIT(NP_VECTOR) | BIT(SS_VECTOR) | BIT(GP_VECTOR) | 117 BIT(PF_VECTOR) | BIT(AC_VECTOR); 118 119 return (1U << vector) & exception_has_error_code; 120 } 121 122 static inline bool mmu_is_nested(struct kvm_vcpu *vcpu) 123 { 124 return vcpu->arch.walk_mmu == &vcpu->arch.nested_mmu; 125 } 126 127 static inline int is_pae(struct kvm_vcpu *vcpu) 128 { 129 return kvm_read_cr4_bits(vcpu, X86_CR4_PAE); 130 } 131 132 static inline int is_pse(struct kvm_vcpu *vcpu) 133 { 134 return kvm_read_cr4_bits(vcpu, X86_CR4_PSE); 135 } 136 137 static inline int is_paging(struct kvm_vcpu *vcpu) 138 { 139 return likely(kvm_read_cr0_bits(vcpu, X86_CR0_PG)); 140 } 141 142 static inline u32 bit(int bitno) 143 { 144 return 1 << (bitno & 31); 145 } 146 147 static inline u8 vcpu_virt_addr_bits(struct kvm_vcpu *vcpu) 148 { 149 return kvm_read_cr4_bits(vcpu, X86_CR4_LA57) ? 57 : 48; 150 } 151 152 static inline u8 ctxt_virt_addr_bits(struct x86_emulate_ctxt *ctxt) 153 { 154 return (ctxt->ops->get_cr(ctxt, 4) & X86_CR4_LA57) ? 57 : 48; 155 } 156 157 static inline u64 get_canonical(u64 la, u8 vaddr_bits) 158 { 159 return ((int64_t)la << (64 - vaddr_bits)) >> (64 - vaddr_bits); 160 } 161 162 static inline bool is_noncanonical_address(u64 la, struct kvm_vcpu *vcpu) 163 { 164 #ifdef CONFIG_X86_64 165 return get_canonical(la, vcpu_virt_addr_bits(vcpu)) != la; 166 #else 167 return false; 168 #endif 169 } 170 171 static inline bool emul_is_noncanonical_address(u64 la, 172 struct x86_emulate_ctxt *ctxt) 173 { 174 #ifdef CONFIG_X86_64 175 return get_canonical(la, ctxt_virt_addr_bits(ctxt)) != la; 176 #else 177 return false; 178 #endif 179 } 180 181 static inline void vcpu_cache_mmio_info(struct kvm_vcpu *vcpu, 182 gva_t gva, gfn_t gfn, unsigned access) 183 { 184 u64 gen = kvm_memslots(vcpu->kvm)->generation; 185 186 if (unlikely(gen & KVM_MEMSLOT_GEN_UPDATE_IN_PROGRESS)) 187 return; 188 189 /* 190 * If this is a shadow nested page table, the "GVA" is 191 * actually a nGPA. 192 */ 193 vcpu->arch.mmio_gva = mmu_is_nested(vcpu) ? 0 : gva & PAGE_MASK; 194 vcpu->arch.access = access; 195 vcpu->arch.mmio_gfn = gfn; 196 vcpu->arch.mmio_gen = gen; 197 } 198 199 static inline bool vcpu_match_mmio_gen(struct kvm_vcpu *vcpu) 200 { 201 return vcpu->arch.mmio_gen == kvm_memslots(vcpu->kvm)->generation; 202 } 203 204 /* 205 * Clear the mmio cache info for the given gva. If gva is MMIO_GVA_ANY, we 206 * clear all mmio cache info. 207 */ 208 #define MMIO_GVA_ANY (~(gva_t)0) 209 210 static inline void vcpu_clear_mmio_info(struct kvm_vcpu *vcpu, gva_t gva) 211 { 212 if (gva != MMIO_GVA_ANY && vcpu->arch.mmio_gva != (gva & PAGE_MASK)) 213 return; 214 215 vcpu->arch.mmio_gva = 0; 216 } 217 218 static inline bool vcpu_match_mmio_gva(struct kvm_vcpu *vcpu, unsigned long gva) 219 { 220 if (vcpu_match_mmio_gen(vcpu) && vcpu->arch.mmio_gva && 221 vcpu->arch.mmio_gva == (gva & PAGE_MASK)) 222 return true; 223 224 return false; 225 } 226 227 static inline bool vcpu_match_mmio_gpa(struct kvm_vcpu *vcpu, gpa_t gpa) 228 { 229 if (vcpu_match_mmio_gen(vcpu) && vcpu->arch.mmio_gfn && 230 vcpu->arch.mmio_gfn == gpa >> PAGE_SHIFT) 231 return true; 232 233 return false; 234 } 235 236 static inline unsigned long kvm_register_readl(struct kvm_vcpu *vcpu, 237 enum kvm_reg reg) 238 { 239 unsigned long val = kvm_register_read(vcpu, reg); 240 241 return is_64_bit_mode(vcpu) ? val : (u32)val; 242 } 243 244 static inline void kvm_register_writel(struct kvm_vcpu *vcpu, 245 enum kvm_reg reg, 246 unsigned long val) 247 { 248 if (!is_64_bit_mode(vcpu)) 249 val = (u32)val; 250 return kvm_register_write(vcpu, reg, val); 251 } 252 253 static inline bool kvm_check_has_quirk(struct kvm *kvm, u64 quirk) 254 { 255 return !(kvm->arch.disabled_quirks & quirk); 256 } 257 258 void kvm_set_pending_timer(struct kvm_vcpu *vcpu); 259 int kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq, int inc_eip); 260 261 void kvm_write_tsc(struct kvm_vcpu *vcpu, struct msr_data *msr); 262 u64 get_kvmclock_ns(struct kvm *kvm); 263 264 int kvm_read_guest_virt(struct kvm_vcpu *vcpu, 265 gva_t addr, void *val, unsigned int bytes, 266 struct x86_exception *exception); 267 268 int kvm_write_guest_virt_system(struct kvm_vcpu *vcpu, 269 gva_t addr, void *val, unsigned int bytes, 270 struct x86_exception *exception); 271 272 int handle_ud(struct kvm_vcpu *vcpu); 273 274 void kvm_deliver_exception_payload(struct kvm_vcpu *vcpu); 275 276 void kvm_vcpu_mtrr_init(struct kvm_vcpu *vcpu); 277 u8 kvm_mtrr_get_guest_memory_type(struct kvm_vcpu *vcpu, gfn_t gfn); 278 bool kvm_mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data); 279 int kvm_mtrr_set_msr(struct kvm_vcpu *vcpu, u32 msr, u64 data); 280 int kvm_mtrr_get_msr(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata); 281 bool kvm_mtrr_check_gfn_range_consistency(struct kvm_vcpu *vcpu, gfn_t gfn, 282 int page_num); 283 bool kvm_vector_hashing_enabled(void); 284 int x86_emulate_instruction(struct kvm_vcpu *vcpu, unsigned long cr2, 285 int emulation_type, void *insn, int insn_len); 286 287 #define KVM_SUPPORTED_XCR0 (XFEATURE_MASK_FP | XFEATURE_MASK_SSE \ 288 | XFEATURE_MASK_YMM | XFEATURE_MASK_BNDREGS \ 289 | XFEATURE_MASK_BNDCSR | XFEATURE_MASK_AVX512 \ 290 | XFEATURE_MASK_PKRU) 291 extern u64 host_xcr0; 292 293 extern u64 kvm_supported_xcr0(void); 294 295 extern unsigned int min_timer_period_us; 296 297 extern unsigned int lapic_timer_advance_ns; 298 299 extern bool enable_vmware_backdoor; 300 301 extern struct static_key kvm_no_apic_vcpu; 302 303 static inline u64 nsec_to_cycles(struct kvm_vcpu *vcpu, u64 nsec) 304 { 305 return pvclock_scale_delta(nsec, vcpu->arch.virtual_tsc_mult, 306 vcpu->arch.virtual_tsc_shift); 307 } 308 309 /* Same "calling convention" as do_div: 310 * - divide (n << 32) by base 311 * - put result in n 312 * - return remainder 313 */ 314 #define do_shl32_div32(n, base) \ 315 ({ \ 316 u32 __quot, __rem; \ 317 asm("divl %2" : "=a" (__quot), "=d" (__rem) \ 318 : "rm" (base), "0" (0), "1" ((u32) n)); \ 319 n = __quot; \ 320 __rem; \ 321 }) 322 323 static inline bool kvm_mwait_in_guest(struct kvm *kvm) 324 { 325 return kvm->arch.mwait_in_guest; 326 } 327 328 static inline bool kvm_hlt_in_guest(struct kvm *kvm) 329 { 330 return kvm->arch.hlt_in_guest; 331 } 332 333 static inline bool kvm_pause_in_guest(struct kvm *kvm) 334 { 335 return kvm->arch.pause_in_guest; 336 } 337 338 DECLARE_PER_CPU(struct kvm_vcpu *, current_vcpu); 339 340 static inline void kvm_before_interrupt(struct kvm_vcpu *vcpu) 341 { 342 __this_cpu_write(current_vcpu, vcpu); 343 } 344 345 static inline void kvm_after_interrupt(struct kvm_vcpu *vcpu) 346 { 347 __this_cpu_write(current_vcpu, NULL); 348 } 349 350 void kvm_load_guest_xcr0(struct kvm_vcpu *vcpu); 351 void kvm_put_guest_xcr0(struct kvm_vcpu *vcpu); 352 #endif 353