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