1 /* 2 * This file is subject to the terms and conditions of the GNU General Public 3 * License. See the file "COPYING" in the main directory of this archive 4 * for more details. 5 * 6 * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved. 7 * Authors: Sanjay Lal <sanjayl@kymasys.com> 8 */ 9 10 #ifndef __MIPS_KVM_HOST_H__ 11 #define __MIPS_KVM_HOST_H__ 12 13 #include <linux/mutex.h> 14 #include <linux/hrtimer.h> 15 #include <linux/interrupt.h> 16 #include <linux/types.h> 17 #include <linux/kvm.h> 18 #include <linux/kvm_types.h> 19 #include <linux/threads.h> 20 #include <linux/spinlock.h> 21 22 /* MIPS KVM register ids */ 23 #define MIPS_CP0_32(_R, _S) \ 24 (KVM_REG_MIPS | KVM_REG_SIZE_U32 | 0x10000 | (8 * (_R) + (_S))) 25 26 #define MIPS_CP0_64(_R, _S) \ 27 (KVM_REG_MIPS | KVM_REG_SIZE_U64 | 0x10000 | (8 * (_R) + (_S))) 28 29 #define KVM_REG_MIPS_CP0_INDEX MIPS_CP0_32(0, 0) 30 #define KVM_REG_MIPS_CP0_ENTRYLO0 MIPS_CP0_64(2, 0) 31 #define KVM_REG_MIPS_CP0_ENTRYLO1 MIPS_CP0_64(3, 0) 32 #define KVM_REG_MIPS_CP0_CONTEXT MIPS_CP0_64(4, 0) 33 #define KVM_REG_MIPS_CP0_USERLOCAL MIPS_CP0_64(4, 2) 34 #define KVM_REG_MIPS_CP0_PAGEMASK MIPS_CP0_32(5, 0) 35 #define KVM_REG_MIPS_CP0_PAGEGRAIN MIPS_CP0_32(5, 1) 36 #define KVM_REG_MIPS_CP0_WIRED MIPS_CP0_32(6, 0) 37 #define KVM_REG_MIPS_CP0_HWRENA MIPS_CP0_32(7, 0) 38 #define KVM_REG_MIPS_CP0_BADVADDR MIPS_CP0_64(8, 0) 39 #define KVM_REG_MIPS_CP0_COUNT MIPS_CP0_32(9, 0) 40 #define KVM_REG_MIPS_CP0_ENTRYHI MIPS_CP0_64(10, 0) 41 #define KVM_REG_MIPS_CP0_COMPARE MIPS_CP0_32(11, 0) 42 #define KVM_REG_MIPS_CP0_STATUS MIPS_CP0_32(12, 0) 43 #define KVM_REG_MIPS_CP0_CAUSE MIPS_CP0_32(13, 0) 44 #define KVM_REG_MIPS_CP0_EPC MIPS_CP0_64(14, 0) 45 #define KVM_REG_MIPS_CP0_EBASE MIPS_CP0_64(15, 1) 46 #define KVM_REG_MIPS_CP0_CONFIG MIPS_CP0_32(16, 0) 47 #define KVM_REG_MIPS_CP0_CONFIG1 MIPS_CP0_32(16, 1) 48 #define KVM_REG_MIPS_CP0_CONFIG2 MIPS_CP0_32(16, 2) 49 #define KVM_REG_MIPS_CP0_CONFIG3 MIPS_CP0_32(16, 3) 50 #define KVM_REG_MIPS_CP0_CONFIG7 MIPS_CP0_32(16, 7) 51 #define KVM_REG_MIPS_CP0_XCONTEXT MIPS_CP0_64(20, 0) 52 #define KVM_REG_MIPS_CP0_ERROREPC MIPS_CP0_64(30, 0) 53 54 55 #define KVM_MAX_VCPUS 1 56 #define KVM_USER_MEM_SLOTS 8 57 /* memory slots that does not exposed to userspace */ 58 #define KVM_PRIVATE_MEM_SLOTS 0 59 60 #define KVM_COALESCED_MMIO_PAGE_OFFSET 1 61 62 63 64 /* Special address that contains the comm page, used for reducing # of traps */ 65 #define KVM_GUEST_COMMPAGE_ADDR 0x0 66 67 #define KVM_GUEST_KERNEL_MODE(vcpu) ((kvm_read_c0_guest_status(vcpu->arch.cop0) & (ST0_EXL | ST0_ERL)) || \ 68 ((kvm_read_c0_guest_status(vcpu->arch.cop0) & KSU_USER) == 0)) 69 70 #define KVM_GUEST_KUSEG 0x00000000UL 71 #define KVM_GUEST_KSEG0 0x40000000UL 72 #define KVM_GUEST_KSEG23 0x60000000UL 73 #define KVM_GUEST_KSEGX(a) ((_ACAST32_(a)) & 0x60000000) 74 #define KVM_GUEST_CPHYSADDR(a) ((_ACAST32_(a)) & 0x1fffffff) 75 76 #define KVM_GUEST_CKSEG0ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG0) 77 #define KVM_GUEST_CKSEG1ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG1) 78 #define KVM_GUEST_CKSEG23ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG23) 79 80 /* 81 * Map an address to a certain kernel segment 82 */ 83 #define KVM_GUEST_KSEG0ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG0) 84 #define KVM_GUEST_KSEG1ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG1) 85 #define KVM_GUEST_KSEG23ADDR(a) (KVM_GUEST_CPHYSADDR(a) | KVM_GUEST_KSEG23) 86 87 #define KVM_INVALID_PAGE 0xdeadbeef 88 #define KVM_INVALID_INST 0xdeadbeef 89 #define KVM_INVALID_ADDR 0xdeadbeef 90 91 #define KVM_MALTA_GUEST_RTC_ADDR 0xb8000070UL 92 93 #define GUEST_TICKS_PER_JIFFY (40000000/HZ) 94 #define MS_TO_NS(x) (x * 1E6L) 95 96 #define CAUSEB_DC 27 97 #define CAUSEF_DC (_ULCAST_(1) << 27) 98 99 extern atomic_t kvm_mips_instance; 100 extern pfn_t(*kvm_mips_gfn_to_pfn) (struct kvm *kvm, gfn_t gfn); 101 extern void (*kvm_mips_release_pfn_clean) (pfn_t pfn); 102 extern bool(*kvm_mips_is_error_pfn) (pfn_t pfn); 103 104 struct kvm_vm_stat { 105 u32 remote_tlb_flush; 106 }; 107 108 struct kvm_vcpu_stat { 109 u32 wait_exits; 110 u32 cache_exits; 111 u32 signal_exits; 112 u32 int_exits; 113 u32 cop_unusable_exits; 114 u32 tlbmod_exits; 115 u32 tlbmiss_ld_exits; 116 u32 tlbmiss_st_exits; 117 u32 addrerr_st_exits; 118 u32 addrerr_ld_exits; 119 u32 syscall_exits; 120 u32 resvd_inst_exits; 121 u32 break_inst_exits; 122 u32 flush_dcache_exits; 123 u32 halt_wakeup; 124 }; 125 126 enum kvm_mips_exit_types { 127 WAIT_EXITS, 128 CACHE_EXITS, 129 SIGNAL_EXITS, 130 INT_EXITS, 131 COP_UNUSABLE_EXITS, 132 TLBMOD_EXITS, 133 TLBMISS_LD_EXITS, 134 TLBMISS_ST_EXITS, 135 ADDRERR_ST_EXITS, 136 ADDRERR_LD_EXITS, 137 SYSCALL_EXITS, 138 RESVD_INST_EXITS, 139 BREAK_INST_EXITS, 140 FLUSH_DCACHE_EXITS, 141 MAX_KVM_MIPS_EXIT_TYPES 142 }; 143 144 struct kvm_arch_memory_slot { 145 }; 146 147 struct kvm_arch { 148 /* Guest GVA->HPA page table */ 149 unsigned long *guest_pmap; 150 unsigned long guest_pmap_npages; 151 152 /* Wired host TLB used for the commpage */ 153 int commpage_tlb; 154 }; 155 156 #define N_MIPS_COPROC_REGS 32 157 #define N_MIPS_COPROC_SEL 8 158 159 struct mips_coproc { 160 unsigned long reg[N_MIPS_COPROC_REGS][N_MIPS_COPROC_SEL]; 161 #ifdef CONFIG_KVM_MIPS_DEBUG_COP0_COUNTERS 162 unsigned long stat[N_MIPS_COPROC_REGS][N_MIPS_COPROC_SEL]; 163 #endif 164 }; 165 166 /* 167 * Coprocessor 0 register names 168 */ 169 #define MIPS_CP0_TLB_INDEX 0 170 #define MIPS_CP0_TLB_RANDOM 1 171 #define MIPS_CP0_TLB_LOW 2 172 #define MIPS_CP0_TLB_LO0 2 173 #define MIPS_CP0_TLB_LO1 3 174 #define MIPS_CP0_TLB_CONTEXT 4 175 #define MIPS_CP0_TLB_PG_MASK 5 176 #define MIPS_CP0_TLB_WIRED 6 177 #define MIPS_CP0_HWRENA 7 178 #define MIPS_CP0_BAD_VADDR 8 179 #define MIPS_CP0_COUNT 9 180 #define MIPS_CP0_TLB_HI 10 181 #define MIPS_CP0_COMPARE 11 182 #define MIPS_CP0_STATUS 12 183 #define MIPS_CP0_CAUSE 13 184 #define MIPS_CP0_EXC_PC 14 185 #define MIPS_CP0_PRID 15 186 #define MIPS_CP0_CONFIG 16 187 #define MIPS_CP0_LLADDR 17 188 #define MIPS_CP0_WATCH_LO 18 189 #define MIPS_CP0_WATCH_HI 19 190 #define MIPS_CP0_TLB_XCONTEXT 20 191 #define MIPS_CP0_ECC 26 192 #define MIPS_CP0_CACHE_ERR 27 193 #define MIPS_CP0_TAG_LO 28 194 #define MIPS_CP0_TAG_HI 29 195 #define MIPS_CP0_ERROR_PC 30 196 #define MIPS_CP0_DEBUG 23 197 #define MIPS_CP0_DEPC 24 198 #define MIPS_CP0_PERFCNT 25 199 #define MIPS_CP0_ERRCTL 26 200 #define MIPS_CP0_DATA_LO 28 201 #define MIPS_CP0_DATA_HI 29 202 #define MIPS_CP0_DESAVE 31 203 204 #define MIPS_CP0_CONFIG_SEL 0 205 #define MIPS_CP0_CONFIG1_SEL 1 206 #define MIPS_CP0_CONFIG2_SEL 2 207 #define MIPS_CP0_CONFIG3_SEL 3 208 209 /* Config0 register bits */ 210 #define CP0C0_M 31 211 #define CP0C0_K23 28 212 #define CP0C0_KU 25 213 #define CP0C0_MDU 20 214 #define CP0C0_MM 17 215 #define CP0C0_BM 16 216 #define CP0C0_BE 15 217 #define CP0C0_AT 13 218 #define CP0C0_AR 10 219 #define CP0C0_MT 7 220 #define CP0C0_VI 3 221 #define CP0C0_K0 0 222 223 /* Config1 register bits */ 224 #define CP0C1_M 31 225 #define CP0C1_MMU 25 226 #define CP0C1_IS 22 227 #define CP0C1_IL 19 228 #define CP0C1_IA 16 229 #define CP0C1_DS 13 230 #define CP0C1_DL 10 231 #define CP0C1_DA 7 232 #define CP0C1_C2 6 233 #define CP0C1_MD 5 234 #define CP0C1_PC 4 235 #define CP0C1_WR 3 236 #define CP0C1_CA 2 237 #define CP0C1_EP 1 238 #define CP0C1_FP 0 239 240 /* Config2 Register bits */ 241 #define CP0C2_M 31 242 #define CP0C2_TU 28 243 #define CP0C2_TS 24 244 #define CP0C2_TL 20 245 #define CP0C2_TA 16 246 #define CP0C2_SU 12 247 #define CP0C2_SS 8 248 #define CP0C2_SL 4 249 #define CP0C2_SA 0 250 251 /* Config3 Register bits */ 252 #define CP0C3_M 31 253 #define CP0C3_ISA_ON_EXC 16 254 #define CP0C3_ULRI 13 255 #define CP0C3_DSPP 10 256 #define CP0C3_LPA 7 257 #define CP0C3_VEIC 6 258 #define CP0C3_VInt 5 259 #define CP0C3_SP 4 260 #define CP0C3_MT 2 261 #define CP0C3_SM 1 262 #define CP0C3_TL 0 263 264 /* Have config1, Cacheable, noncoherent, write-back, write allocate*/ 265 #define MIPS_CONFIG0 \ 266 ((1 << CP0C0_M) | (0x3 << CP0C0_K0)) 267 268 /* Have config2, no coprocessor2 attached, no MDMX support attached, 269 no performance counters, watch registers present, 270 no code compression, EJTAG present, no FPU, no watch registers */ 271 #define MIPS_CONFIG1 \ 272 ((1 << CP0C1_M) | \ 273 (0 << CP0C1_C2) | (0 << CP0C1_MD) | (0 << CP0C1_PC) | \ 274 (0 << CP0C1_WR) | (0 << CP0C1_CA) | (1 << CP0C1_EP) | \ 275 (0 << CP0C1_FP)) 276 277 /* Have config3, no tertiary/secondary caches implemented */ 278 #define MIPS_CONFIG2 \ 279 ((1 << CP0C2_M)) 280 281 /* No config4, no DSP ASE, no large physaddr (PABITS), 282 no external interrupt controller, no vectored interrupts, 283 no 1kb pages, no SmartMIPS ASE, no trace logic */ 284 #define MIPS_CONFIG3 \ 285 ((0 << CP0C3_M) | (0 << CP0C3_DSPP) | (0 << CP0C3_LPA) | \ 286 (0 << CP0C3_VEIC) | (0 << CP0C3_VInt) | (0 << CP0C3_SP) | \ 287 (0 << CP0C3_SM) | (0 << CP0C3_TL)) 288 289 /* MMU types, the first four entries have the same layout as the 290 CP0C0_MT field. */ 291 enum mips_mmu_types { 292 MMU_TYPE_NONE, 293 MMU_TYPE_R4000, 294 MMU_TYPE_RESERVED, 295 MMU_TYPE_FMT, 296 MMU_TYPE_R3000, 297 MMU_TYPE_R6000, 298 MMU_TYPE_R8000 299 }; 300 301 /* 302 * Trap codes 303 */ 304 #define T_INT 0 /* Interrupt pending */ 305 #define T_TLB_MOD 1 /* TLB modified fault */ 306 #define T_TLB_LD_MISS 2 /* TLB miss on load or ifetch */ 307 #define T_TLB_ST_MISS 3 /* TLB miss on a store */ 308 #define T_ADDR_ERR_LD 4 /* Address error on a load or ifetch */ 309 #define T_ADDR_ERR_ST 5 /* Address error on a store */ 310 #define T_BUS_ERR_IFETCH 6 /* Bus error on an ifetch */ 311 #define T_BUS_ERR_LD_ST 7 /* Bus error on a load or store */ 312 #define T_SYSCALL 8 /* System call */ 313 #define T_BREAK 9 /* Breakpoint */ 314 #define T_RES_INST 10 /* Reserved instruction exception */ 315 #define T_COP_UNUSABLE 11 /* Coprocessor unusable */ 316 #define T_OVFLOW 12 /* Arithmetic overflow */ 317 318 /* 319 * Trap definitions added for r4000 port. 320 */ 321 #define T_TRAP 13 /* Trap instruction */ 322 #define T_VCEI 14 /* Virtual coherency exception */ 323 #define T_FPE 15 /* Floating point exception */ 324 #define T_WATCH 23 /* Watch address reference */ 325 #define T_VCED 31 /* Virtual coherency data */ 326 327 /* Resume Flags */ 328 #define RESUME_FLAG_DR (1<<0) /* Reload guest nonvolatile state? */ 329 #define RESUME_FLAG_HOST (1<<1) /* Resume host? */ 330 331 #define RESUME_GUEST 0 332 #define RESUME_GUEST_DR RESUME_FLAG_DR 333 #define RESUME_HOST RESUME_FLAG_HOST 334 335 enum emulation_result { 336 EMULATE_DONE, /* no further processing */ 337 EMULATE_DO_MMIO, /* kvm_run filled with MMIO request */ 338 EMULATE_FAIL, /* can't emulate this instruction */ 339 EMULATE_WAIT, /* WAIT instruction */ 340 EMULATE_PRIV_FAIL, 341 }; 342 343 #define MIPS3_PG_G 0x00000001 /* Global; ignore ASID if in lo0 & lo1 */ 344 #define MIPS3_PG_V 0x00000002 /* Valid */ 345 #define MIPS3_PG_NV 0x00000000 346 #define MIPS3_PG_D 0x00000004 /* Dirty */ 347 348 #define mips3_paddr_to_tlbpfn(x) \ 349 (((unsigned long)(x) >> MIPS3_PG_SHIFT) & MIPS3_PG_FRAME) 350 #define mips3_tlbpfn_to_paddr(x) \ 351 ((unsigned long)((x) & MIPS3_PG_FRAME) << MIPS3_PG_SHIFT) 352 353 #define MIPS3_PG_SHIFT 6 354 #define MIPS3_PG_FRAME 0x3fffffc0 355 356 #define VPN2_MASK 0xffffe000 357 #define TLB_IS_GLOBAL(x) (((x).tlb_lo0 & MIPS3_PG_G) && \ 358 ((x).tlb_lo1 & MIPS3_PG_G)) 359 #define TLB_VPN2(x) ((x).tlb_hi & VPN2_MASK) 360 #define TLB_ASID(x) ((x).tlb_hi & ASID_MASK) 361 #define TLB_IS_VALID(x, va) (((va) & (1 << PAGE_SHIFT)) \ 362 ? ((x).tlb_lo1 & MIPS3_PG_V) \ 363 : ((x).tlb_lo0 & MIPS3_PG_V)) 364 #define TLB_HI_VPN2_HIT(x, y) ((TLB_VPN2(x) & ~(x).tlb_mask) == \ 365 ((y) & VPN2_MASK & ~(x).tlb_mask)) 366 #define TLB_HI_ASID_HIT(x, y) (TLB_IS_GLOBAL(x) || \ 367 TLB_ASID(x) == ((y) & ASID_MASK)) 368 369 struct kvm_mips_tlb { 370 long tlb_mask; 371 long tlb_hi; 372 long tlb_lo0; 373 long tlb_lo1; 374 }; 375 376 #define KVM_MIPS_GUEST_TLB_SIZE 64 377 struct kvm_vcpu_arch { 378 void *host_ebase, *guest_ebase; 379 unsigned long host_stack; 380 unsigned long host_gp; 381 382 /* Host CP0 registers used when handling exits from guest */ 383 unsigned long host_cp0_badvaddr; 384 unsigned long host_cp0_cause; 385 unsigned long host_cp0_epc; 386 unsigned long host_cp0_entryhi; 387 uint32_t guest_inst; 388 389 /* GPRS */ 390 unsigned long gprs[32]; 391 unsigned long hi; 392 unsigned long lo; 393 unsigned long pc; 394 395 /* FPU State */ 396 struct mips_fpu_struct fpu; 397 398 /* COP0 State */ 399 struct mips_coproc *cop0; 400 401 /* Host KSEG0 address of the EI/DI offset */ 402 void *kseg0_commpage; 403 404 u32 io_gpr; /* GPR used as IO source/target */ 405 406 struct hrtimer comparecount_timer; 407 /* Count timer control KVM register */ 408 uint32_t count_ctl; 409 /* Count bias from the raw time */ 410 uint32_t count_bias; 411 /* Frequency of timer in Hz */ 412 uint32_t count_hz; 413 /* Dynamic nanosecond bias (multiple of count_period) to avoid overflow */ 414 s64 count_dyn_bias; 415 /* Resume time */ 416 ktime_t count_resume; 417 /* Period of timer tick in ns */ 418 u64 count_period; 419 420 /* Bitmask of exceptions that are pending */ 421 unsigned long pending_exceptions; 422 423 /* Bitmask of pending exceptions to be cleared */ 424 unsigned long pending_exceptions_clr; 425 426 unsigned long pending_load_cause; 427 428 /* Save/Restore the entryhi register when are are preempted/scheduled back in */ 429 unsigned long preempt_entryhi; 430 431 /* S/W Based TLB for guest */ 432 struct kvm_mips_tlb guest_tlb[KVM_MIPS_GUEST_TLB_SIZE]; 433 434 /* Cached guest kernel/user ASIDs */ 435 uint32_t guest_user_asid[NR_CPUS]; 436 uint32_t guest_kernel_asid[NR_CPUS]; 437 struct mm_struct guest_kernel_mm, guest_user_mm; 438 439 int last_sched_cpu; 440 441 /* WAIT executed */ 442 int wait; 443 }; 444 445 446 #define kvm_read_c0_guest_index(cop0) (cop0->reg[MIPS_CP0_TLB_INDEX][0]) 447 #define kvm_write_c0_guest_index(cop0, val) (cop0->reg[MIPS_CP0_TLB_INDEX][0] = val) 448 #define kvm_read_c0_guest_entrylo0(cop0) (cop0->reg[MIPS_CP0_TLB_LO0][0]) 449 #define kvm_read_c0_guest_entrylo1(cop0) (cop0->reg[MIPS_CP0_TLB_LO1][0]) 450 #define kvm_read_c0_guest_context(cop0) (cop0->reg[MIPS_CP0_TLB_CONTEXT][0]) 451 #define kvm_write_c0_guest_context(cop0, val) (cop0->reg[MIPS_CP0_TLB_CONTEXT][0] = (val)) 452 #define kvm_read_c0_guest_userlocal(cop0) (cop0->reg[MIPS_CP0_TLB_CONTEXT][2]) 453 #define kvm_write_c0_guest_userlocal(cop0, val) (cop0->reg[MIPS_CP0_TLB_CONTEXT][2] = (val)) 454 #define kvm_read_c0_guest_pagemask(cop0) (cop0->reg[MIPS_CP0_TLB_PG_MASK][0]) 455 #define kvm_write_c0_guest_pagemask(cop0, val) (cop0->reg[MIPS_CP0_TLB_PG_MASK][0] = (val)) 456 #define kvm_read_c0_guest_wired(cop0) (cop0->reg[MIPS_CP0_TLB_WIRED][0]) 457 #define kvm_write_c0_guest_wired(cop0, val) (cop0->reg[MIPS_CP0_TLB_WIRED][0] = (val)) 458 #define kvm_read_c0_guest_hwrena(cop0) (cop0->reg[MIPS_CP0_HWRENA][0]) 459 #define kvm_write_c0_guest_hwrena(cop0, val) (cop0->reg[MIPS_CP0_HWRENA][0] = (val)) 460 #define kvm_read_c0_guest_badvaddr(cop0) (cop0->reg[MIPS_CP0_BAD_VADDR][0]) 461 #define kvm_write_c0_guest_badvaddr(cop0, val) (cop0->reg[MIPS_CP0_BAD_VADDR][0] = (val)) 462 #define kvm_read_c0_guest_count(cop0) (cop0->reg[MIPS_CP0_COUNT][0]) 463 #define kvm_write_c0_guest_count(cop0, val) (cop0->reg[MIPS_CP0_COUNT][0] = (val)) 464 #define kvm_read_c0_guest_entryhi(cop0) (cop0->reg[MIPS_CP0_TLB_HI][0]) 465 #define kvm_write_c0_guest_entryhi(cop0, val) (cop0->reg[MIPS_CP0_TLB_HI][0] = (val)) 466 #define kvm_read_c0_guest_compare(cop0) (cop0->reg[MIPS_CP0_COMPARE][0]) 467 #define kvm_write_c0_guest_compare(cop0, val) (cop0->reg[MIPS_CP0_COMPARE][0] = (val)) 468 #define kvm_read_c0_guest_status(cop0) (cop0->reg[MIPS_CP0_STATUS][0]) 469 #define kvm_write_c0_guest_status(cop0, val) (cop0->reg[MIPS_CP0_STATUS][0] = (val)) 470 #define kvm_read_c0_guest_intctl(cop0) (cop0->reg[MIPS_CP0_STATUS][1]) 471 #define kvm_write_c0_guest_intctl(cop0, val) (cop0->reg[MIPS_CP0_STATUS][1] = (val)) 472 #define kvm_read_c0_guest_cause(cop0) (cop0->reg[MIPS_CP0_CAUSE][0]) 473 #define kvm_write_c0_guest_cause(cop0, val) (cop0->reg[MIPS_CP0_CAUSE][0] = (val)) 474 #define kvm_read_c0_guest_epc(cop0) (cop0->reg[MIPS_CP0_EXC_PC][0]) 475 #define kvm_write_c0_guest_epc(cop0, val) (cop0->reg[MIPS_CP0_EXC_PC][0] = (val)) 476 #define kvm_read_c0_guest_prid(cop0) (cop0->reg[MIPS_CP0_PRID][0]) 477 #define kvm_write_c0_guest_prid(cop0, val) (cop0->reg[MIPS_CP0_PRID][0] = (val)) 478 #define kvm_read_c0_guest_ebase(cop0) (cop0->reg[MIPS_CP0_PRID][1]) 479 #define kvm_write_c0_guest_ebase(cop0, val) (cop0->reg[MIPS_CP0_PRID][1] = (val)) 480 #define kvm_read_c0_guest_config(cop0) (cop0->reg[MIPS_CP0_CONFIG][0]) 481 #define kvm_read_c0_guest_config1(cop0) (cop0->reg[MIPS_CP0_CONFIG][1]) 482 #define kvm_read_c0_guest_config2(cop0) (cop0->reg[MIPS_CP0_CONFIG][2]) 483 #define kvm_read_c0_guest_config3(cop0) (cop0->reg[MIPS_CP0_CONFIG][3]) 484 #define kvm_read_c0_guest_config7(cop0) (cop0->reg[MIPS_CP0_CONFIG][7]) 485 #define kvm_write_c0_guest_config(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][0] = (val)) 486 #define kvm_write_c0_guest_config1(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][1] = (val)) 487 #define kvm_write_c0_guest_config2(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][2] = (val)) 488 #define kvm_write_c0_guest_config3(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][3] = (val)) 489 #define kvm_write_c0_guest_config7(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][7] = (val)) 490 #define kvm_read_c0_guest_errorepc(cop0) (cop0->reg[MIPS_CP0_ERROR_PC][0]) 491 #define kvm_write_c0_guest_errorepc(cop0, val) (cop0->reg[MIPS_CP0_ERROR_PC][0] = (val)) 492 493 /* 494 * Some of the guest registers may be modified asynchronously (e.g. from a 495 * hrtimer callback in hard irq context) and therefore need stronger atomicity 496 * guarantees than other registers. 497 */ 498 499 static inline void _kvm_atomic_set_c0_guest_reg(unsigned long *reg, 500 unsigned long val) 501 { 502 unsigned long temp; 503 do { 504 __asm__ __volatile__( 505 " .set mips3 \n" 506 " " __LL "%0, %1 \n" 507 " or %0, %2 \n" 508 " " __SC "%0, %1 \n" 509 " .set mips0 \n" 510 : "=&r" (temp), "+m" (*reg) 511 : "r" (val)); 512 } while (unlikely(!temp)); 513 } 514 515 static inline void _kvm_atomic_clear_c0_guest_reg(unsigned long *reg, 516 unsigned long val) 517 { 518 unsigned long temp; 519 do { 520 __asm__ __volatile__( 521 " .set mips3 \n" 522 " " __LL "%0, %1 \n" 523 " and %0, %2 \n" 524 " " __SC "%0, %1 \n" 525 " .set mips0 \n" 526 : "=&r" (temp), "+m" (*reg) 527 : "r" (~val)); 528 } while (unlikely(!temp)); 529 } 530 531 static inline void _kvm_atomic_change_c0_guest_reg(unsigned long *reg, 532 unsigned long change, 533 unsigned long val) 534 { 535 unsigned long temp; 536 do { 537 __asm__ __volatile__( 538 " .set mips3 \n" 539 " " __LL "%0, %1 \n" 540 " and %0, %2 \n" 541 " or %0, %3 \n" 542 " " __SC "%0, %1 \n" 543 " .set mips0 \n" 544 : "=&r" (temp), "+m" (*reg) 545 : "r" (~change), "r" (val & change)); 546 } while (unlikely(!temp)); 547 } 548 549 #define kvm_set_c0_guest_status(cop0, val) (cop0->reg[MIPS_CP0_STATUS][0] |= (val)) 550 #define kvm_clear_c0_guest_status(cop0, val) (cop0->reg[MIPS_CP0_STATUS][0] &= ~(val)) 551 552 /* Cause can be modified asynchronously from hardirq hrtimer callback */ 553 #define kvm_set_c0_guest_cause(cop0, val) \ 554 _kvm_atomic_set_c0_guest_reg(&cop0->reg[MIPS_CP0_CAUSE][0], val) 555 #define kvm_clear_c0_guest_cause(cop0, val) \ 556 _kvm_atomic_clear_c0_guest_reg(&cop0->reg[MIPS_CP0_CAUSE][0], val) 557 #define kvm_change_c0_guest_cause(cop0, change, val) \ 558 _kvm_atomic_change_c0_guest_reg(&cop0->reg[MIPS_CP0_CAUSE][0], \ 559 change, val) 560 561 #define kvm_set_c0_guest_ebase(cop0, val) (cop0->reg[MIPS_CP0_PRID][1] |= (val)) 562 #define kvm_clear_c0_guest_ebase(cop0, val) (cop0->reg[MIPS_CP0_PRID][1] &= ~(val)) 563 #define kvm_change_c0_guest_ebase(cop0, change, val) \ 564 { \ 565 kvm_clear_c0_guest_ebase(cop0, change); \ 566 kvm_set_c0_guest_ebase(cop0, ((val) & (change))); \ 567 } 568 569 570 struct kvm_mips_callbacks { 571 int (*handle_cop_unusable)(struct kvm_vcpu *vcpu); 572 int (*handle_tlb_mod)(struct kvm_vcpu *vcpu); 573 int (*handle_tlb_ld_miss)(struct kvm_vcpu *vcpu); 574 int (*handle_tlb_st_miss)(struct kvm_vcpu *vcpu); 575 int (*handle_addr_err_st)(struct kvm_vcpu *vcpu); 576 int (*handle_addr_err_ld)(struct kvm_vcpu *vcpu); 577 int (*handle_syscall)(struct kvm_vcpu *vcpu); 578 int (*handle_res_inst)(struct kvm_vcpu *vcpu); 579 int (*handle_break)(struct kvm_vcpu *vcpu); 580 int (*vm_init)(struct kvm *kvm); 581 int (*vcpu_init)(struct kvm_vcpu *vcpu); 582 int (*vcpu_setup)(struct kvm_vcpu *vcpu); 583 gpa_t (*gva_to_gpa)(gva_t gva); 584 void (*queue_timer_int)(struct kvm_vcpu *vcpu); 585 void (*dequeue_timer_int)(struct kvm_vcpu *vcpu); 586 void (*queue_io_int)(struct kvm_vcpu *vcpu, 587 struct kvm_mips_interrupt *irq); 588 void (*dequeue_io_int)(struct kvm_vcpu *vcpu, 589 struct kvm_mips_interrupt *irq); 590 int (*irq_deliver)(struct kvm_vcpu *vcpu, unsigned int priority, 591 uint32_t cause); 592 int (*irq_clear)(struct kvm_vcpu *vcpu, unsigned int priority, 593 uint32_t cause); 594 int (*get_one_reg)(struct kvm_vcpu *vcpu, 595 const struct kvm_one_reg *reg, s64 *v); 596 int (*set_one_reg)(struct kvm_vcpu *vcpu, 597 const struct kvm_one_reg *reg, s64 v); 598 }; 599 extern struct kvm_mips_callbacks *kvm_mips_callbacks; 600 int kvm_mips_emulation_init(struct kvm_mips_callbacks **install_callbacks); 601 602 /* Debug: dump vcpu state */ 603 int kvm_arch_vcpu_dump_regs(struct kvm_vcpu *vcpu); 604 605 /* Trampoline ASM routine to start running in "Guest" context */ 606 extern int __kvm_mips_vcpu_run(struct kvm_run *run, struct kvm_vcpu *vcpu); 607 608 /* TLB handling */ 609 uint32_t kvm_get_kernel_asid(struct kvm_vcpu *vcpu); 610 611 uint32_t kvm_get_user_asid(struct kvm_vcpu *vcpu); 612 613 uint32_t kvm_get_commpage_asid (struct kvm_vcpu *vcpu); 614 615 extern int kvm_mips_handle_kseg0_tlb_fault(unsigned long badbaddr, 616 struct kvm_vcpu *vcpu); 617 618 extern int kvm_mips_handle_commpage_tlb_fault(unsigned long badvaddr, 619 struct kvm_vcpu *vcpu); 620 621 extern int kvm_mips_handle_mapped_seg_tlb_fault(struct kvm_vcpu *vcpu, 622 struct kvm_mips_tlb *tlb, 623 unsigned long *hpa0, 624 unsigned long *hpa1); 625 626 extern enum emulation_result kvm_mips_handle_tlbmiss(unsigned long cause, 627 uint32_t *opc, 628 struct kvm_run *run, 629 struct kvm_vcpu *vcpu); 630 631 extern enum emulation_result kvm_mips_handle_tlbmod(unsigned long cause, 632 uint32_t *opc, 633 struct kvm_run *run, 634 struct kvm_vcpu *vcpu); 635 636 extern void kvm_mips_dump_host_tlbs(void); 637 extern void kvm_mips_dump_guest_tlbs(struct kvm_vcpu *vcpu); 638 extern void kvm_mips_flush_host_tlb(int skip_kseg0); 639 extern int kvm_mips_host_tlb_inv(struct kvm_vcpu *vcpu, unsigned long entryhi); 640 extern int kvm_mips_host_tlb_inv_index(struct kvm_vcpu *vcpu, int index); 641 642 extern int kvm_mips_guest_tlb_lookup(struct kvm_vcpu *vcpu, 643 unsigned long entryhi); 644 extern int kvm_mips_host_tlb_lookup(struct kvm_vcpu *vcpu, unsigned long vaddr); 645 extern unsigned long kvm_mips_translate_guest_kseg0_to_hpa(struct kvm_vcpu *vcpu, 646 unsigned long gva); 647 extern void kvm_get_new_mmu_context(struct mm_struct *mm, unsigned long cpu, 648 struct kvm_vcpu *vcpu); 649 extern void kvm_local_flush_tlb_all(void); 650 extern void kvm_mips_alloc_new_mmu_context(struct kvm_vcpu *vcpu); 651 extern void kvm_mips_vcpu_load(struct kvm_vcpu *vcpu, int cpu); 652 extern void kvm_mips_vcpu_put(struct kvm_vcpu *vcpu); 653 654 /* Emulation */ 655 uint32_t kvm_get_inst(uint32_t *opc, struct kvm_vcpu *vcpu); 656 enum emulation_result update_pc(struct kvm_vcpu *vcpu, uint32_t cause); 657 658 extern enum emulation_result kvm_mips_emulate_inst(unsigned long cause, 659 uint32_t *opc, 660 struct kvm_run *run, 661 struct kvm_vcpu *vcpu); 662 663 extern enum emulation_result kvm_mips_emulate_syscall(unsigned long cause, 664 uint32_t *opc, 665 struct kvm_run *run, 666 struct kvm_vcpu *vcpu); 667 668 extern enum emulation_result kvm_mips_emulate_tlbmiss_ld(unsigned long cause, 669 uint32_t *opc, 670 struct kvm_run *run, 671 struct kvm_vcpu *vcpu); 672 673 extern enum emulation_result kvm_mips_emulate_tlbinv_ld(unsigned long cause, 674 uint32_t *opc, 675 struct kvm_run *run, 676 struct kvm_vcpu *vcpu); 677 678 extern enum emulation_result kvm_mips_emulate_tlbmiss_st(unsigned long cause, 679 uint32_t *opc, 680 struct kvm_run *run, 681 struct kvm_vcpu *vcpu); 682 683 extern enum emulation_result kvm_mips_emulate_tlbinv_st(unsigned long cause, 684 uint32_t *opc, 685 struct kvm_run *run, 686 struct kvm_vcpu *vcpu); 687 688 extern enum emulation_result kvm_mips_emulate_tlbmod(unsigned long cause, 689 uint32_t *opc, 690 struct kvm_run *run, 691 struct kvm_vcpu *vcpu); 692 693 extern enum emulation_result kvm_mips_emulate_fpu_exc(unsigned long cause, 694 uint32_t *opc, 695 struct kvm_run *run, 696 struct kvm_vcpu *vcpu); 697 698 extern enum emulation_result kvm_mips_handle_ri(unsigned long cause, 699 uint32_t *opc, 700 struct kvm_run *run, 701 struct kvm_vcpu *vcpu); 702 703 extern enum emulation_result kvm_mips_emulate_ri_exc(unsigned long cause, 704 uint32_t *opc, 705 struct kvm_run *run, 706 struct kvm_vcpu *vcpu); 707 708 extern enum emulation_result kvm_mips_emulate_bp_exc(unsigned long cause, 709 uint32_t *opc, 710 struct kvm_run *run, 711 struct kvm_vcpu *vcpu); 712 713 extern enum emulation_result kvm_mips_complete_mmio_load(struct kvm_vcpu *vcpu, 714 struct kvm_run *run); 715 716 uint32_t kvm_mips_read_count(struct kvm_vcpu *vcpu); 717 void kvm_mips_write_count(struct kvm_vcpu *vcpu, uint32_t count); 718 void kvm_mips_write_compare(struct kvm_vcpu *vcpu, uint32_t compare); 719 void kvm_mips_init_count(struct kvm_vcpu *vcpu); 720 int kvm_mips_set_count_ctl(struct kvm_vcpu *vcpu, s64 count_ctl); 721 int kvm_mips_set_count_resume(struct kvm_vcpu *vcpu, s64 count_resume); 722 int kvm_mips_set_count_hz(struct kvm_vcpu *vcpu, s64 count_hz); 723 void kvm_mips_count_enable_cause(struct kvm_vcpu *vcpu); 724 void kvm_mips_count_disable_cause(struct kvm_vcpu *vcpu); 725 enum hrtimer_restart kvm_mips_count_timeout(struct kvm_vcpu *vcpu); 726 727 enum emulation_result kvm_mips_check_privilege(unsigned long cause, 728 uint32_t *opc, 729 struct kvm_run *run, 730 struct kvm_vcpu *vcpu); 731 732 enum emulation_result kvm_mips_emulate_cache(uint32_t inst, 733 uint32_t *opc, 734 uint32_t cause, 735 struct kvm_run *run, 736 struct kvm_vcpu *vcpu); 737 enum emulation_result kvm_mips_emulate_CP0(uint32_t inst, 738 uint32_t *opc, 739 uint32_t cause, 740 struct kvm_run *run, 741 struct kvm_vcpu *vcpu); 742 enum emulation_result kvm_mips_emulate_store(uint32_t inst, 743 uint32_t cause, 744 struct kvm_run *run, 745 struct kvm_vcpu *vcpu); 746 enum emulation_result kvm_mips_emulate_load(uint32_t inst, 747 uint32_t cause, 748 struct kvm_run *run, 749 struct kvm_vcpu *vcpu); 750 751 /* Dynamic binary translation */ 752 extern int kvm_mips_trans_cache_index(uint32_t inst, uint32_t *opc, 753 struct kvm_vcpu *vcpu); 754 extern int kvm_mips_trans_cache_va(uint32_t inst, uint32_t *opc, 755 struct kvm_vcpu *vcpu); 756 extern int kvm_mips_trans_mfc0(uint32_t inst, uint32_t *opc, 757 struct kvm_vcpu *vcpu); 758 extern int kvm_mips_trans_mtc0(uint32_t inst, uint32_t *opc, 759 struct kvm_vcpu *vcpu); 760 761 /* Misc */ 762 extern void kvm_mips_dump_stats(struct kvm_vcpu *vcpu); 763 extern unsigned long kvm_mips_get_ramsize(struct kvm *kvm); 764 765 static inline void kvm_arch_hardware_disable(void) {} 766 static inline void kvm_arch_hardware_unsetup(void) {} 767 static inline void kvm_arch_sync_events(struct kvm *kvm) {} 768 static inline void kvm_arch_free_memslot(struct kvm *kvm, 769 struct kvm_memory_slot *free, struct kvm_memory_slot *dont) {} 770 static inline void kvm_arch_memslots_updated(struct kvm *kvm) {} 771 static inline void kvm_arch_flush_shadow_all(struct kvm *kvm) {} 772 static inline void kvm_arch_flush_shadow_memslot(struct kvm *kvm, 773 struct kvm_memory_slot *slot) {} 774 static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {} 775 static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {} 776 777 #endif /* __MIPS_KVM_HOST_H__ */ 778