1 /* 2 * This program is free software; you can redistribute it and/or modify 3 * it under the terms of the GNU General Public License, version 2, as 4 * published by the Free Software Foundation. 5 * 6 * This program is distributed in the hope that it will be useful, 7 * but WITHOUT ANY WARRANTY; without even the implied warranty of 8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 9 * GNU General Public License for more details. 10 * 11 * You should have received a copy of the GNU General Public License 12 * along with this program; if not, write to the Free Software 13 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. 14 * 15 * Copyright IBM Corp. 2007 16 * 17 * Authors: Hollis Blanchard <hollisb@us.ibm.com> 18 */ 19 20 #ifndef __POWERPC_KVM_HOST_H__ 21 #define __POWERPC_KVM_HOST_H__ 22 23 #include <linux/mutex.h> 24 #include <linux/hrtimer.h> 25 #include <linux/interrupt.h> 26 #include <linux/types.h> 27 #include <linux/kvm_types.h> 28 #include <linux/threads.h> 29 #include <linux/spinlock.h> 30 #include <linux/kvm_para.h> 31 #include <linux/list.h> 32 #include <linux/atomic.h> 33 #include <asm/kvm_asm.h> 34 #include <asm/processor.h> 35 #include <asm/page.h> 36 #include <asm/cacheflush.h> 37 38 #define KVM_MAX_VCPUS NR_CPUS 39 #define KVM_MAX_VCORES NR_CPUS 40 #define KVM_USER_MEM_SLOTS 32 41 #define KVM_MEM_SLOTS_NUM KVM_USER_MEM_SLOTS 42 43 #ifdef CONFIG_KVM_MMIO 44 #define KVM_COALESCED_MMIO_PAGE_OFFSET 1 45 #endif 46 47 #if !defined(CONFIG_KVM_440) 48 #include <linux/mmu_notifier.h> 49 50 #define KVM_ARCH_WANT_MMU_NOTIFIER 51 52 struct kvm; 53 extern int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); 54 extern int kvm_unmap_hva_range(struct kvm *kvm, 55 unsigned long start, unsigned long end); 56 extern int kvm_age_hva(struct kvm *kvm, unsigned long hva); 57 extern int kvm_test_age_hva(struct kvm *kvm, unsigned long hva); 58 extern void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); 59 60 #endif 61 62 /* We don't currently support large pages. */ 63 #define KVM_HPAGE_GFN_SHIFT(x) 0 64 #define KVM_NR_PAGE_SIZES 1 65 #define KVM_PAGES_PER_HPAGE(x) (1UL<<31) 66 67 #define HPTEG_CACHE_NUM (1 << 15) 68 #define HPTEG_HASH_BITS_PTE 13 69 #define HPTEG_HASH_BITS_PTE_LONG 12 70 #define HPTEG_HASH_BITS_VPTE 13 71 #define HPTEG_HASH_BITS_VPTE_LONG 5 72 #define HPTEG_HASH_NUM_PTE (1 << HPTEG_HASH_BITS_PTE) 73 #define HPTEG_HASH_NUM_PTE_LONG (1 << HPTEG_HASH_BITS_PTE_LONG) 74 #define HPTEG_HASH_NUM_VPTE (1 << HPTEG_HASH_BITS_VPTE) 75 #define HPTEG_HASH_NUM_VPTE_LONG (1 << HPTEG_HASH_BITS_VPTE_LONG) 76 77 /* Physical Address Mask - allowed range of real mode RAM access */ 78 #define KVM_PAM 0x0fffffffffffffffULL 79 80 struct kvm; 81 struct kvm_run; 82 struct kvm_vcpu; 83 84 struct lppaca; 85 struct slb_shadow; 86 struct dtl_entry; 87 88 struct kvm_vm_stat { 89 u32 remote_tlb_flush; 90 }; 91 92 struct kvm_vcpu_stat { 93 u32 sum_exits; 94 u32 mmio_exits; 95 u32 dcr_exits; 96 u32 signal_exits; 97 u32 light_exits; 98 /* Account for special types of light exits: */ 99 u32 itlb_real_miss_exits; 100 u32 itlb_virt_miss_exits; 101 u32 dtlb_real_miss_exits; 102 u32 dtlb_virt_miss_exits; 103 u32 syscall_exits; 104 u32 isi_exits; 105 u32 dsi_exits; 106 u32 emulated_inst_exits; 107 u32 dec_exits; 108 u32 ext_intr_exits; 109 u32 halt_wakeup; 110 u32 dbell_exits; 111 u32 gdbell_exits; 112 #ifdef CONFIG_PPC_BOOK3S 113 u32 pf_storage; 114 u32 pf_instruc; 115 u32 sp_storage; 116 u32 sp_instruc; 117 u32 queue_intr; 118 u32 ld; 119 u32 ld_slow; 120 u32 st; 121 u32 st_slow; 122 #endif 123 }; 124 125 enum kvm_exit_types { 126 MMIO_EXITS, 127 DCR_EXITS, 128 SIGNAL_EXITS, 129 ITLB_REAL_MISS_EXITS, 130 ITLB_VIRT_MISS_EXITS, 131 DTLB_REAL_MISS_EXITS, 132 DTLB_VIRT_MISS_EXITS, 133 SYSCALL_EXITS, 134 ISI_EXITS, 135 DSI_EXITS, 136 EMULATED_INST_EXITS, 137 EMULATED_MTMSRWE_EXITS, 138 EMULATED_WRTEE_EXITS, 139 EMULATED_MTSPR_EXITS, 140 EMULATED_MFSPR_EXITS, 141 EMULATED_MTMSR_EXITS, 142 EMULATED_MFMSR_EXITS, 143 EMULATED_TLBSX_EXITS, 144 EMULATED_TLBWE_EXITS, 145 EMULATED_RFI_EXITS, 146 EMULATED_RFCI_EXITS, 147 DEC_EXITS, 148 EXT_INTR_EXITS, 149 HALT_WAKEUP, 150 USR_PR_INST, 151 FP_UNAVAIL, 152 DEBUG_EXITS, 153 TIMEINGUEST, 154 DBELL_EXITS, 155 GDBELL_EXITS, 156 __NUMBER_OF_KVM_EXIT_TYPES 157 }; 158 159 /* allow access to big endian 32bit upper/lower parts and 64bit var */ 160 struct kvmppc_exit_timing { 161 union { 162 u64 tv64; 163 struct { 164 u32 tbu, tbl; 165 } tv32; 166 }; 167 }; 168 169 struct kvmppc_pginfo { 170 unsigned long pfn; 171 atomic_t refcnt; 172 }; 173 174 struct kvmppc_spapr_tce_table { 175 struct list_head list; 176 struct kvm *kvm; 177 u64 liobn; 178 u32 window_size; 179 struct page *pages[0]; 180 }; 181 182 struct kvmppc_linear_info { 183 void *base_virt; 184 unsigned long base_pfn; 185 unsigned long npages; 186 struct list_head list; 187 atomic_t use_count; 188 int type; 189 }; 190 191 /* 192 * The reverse mapping array has one entry for each HPTE, 193 * which stores the guest's view of the second word of the HPTE 194 * (including the guest physical address of the mapping), 195 * plus forward and backward pointers in a doubly-linked ring 196 * of HPTEs that map the same host page. The pointers in this 197 * ring are 32-bit HPTE indexes, to save space. 198 */ 199 struct revmap_entry { 200 unsigned long guest_rpte; 201 unsigned int forw, back; 202 }; 203 204 /* 205 * We use the top bit of each memslot->arch.rmap entry as a lock bit, 206 * and bit 32 as a present flag. The bottom 32 bits are the 207 * index in the guest HPT of a HPTE that points to the page. 208 */ 209 #define KVMPPC_RMAP_LOCK_BIT 63 210 #define KVMPPC_RMAP_RC_SHIFT 32 211 #define KVMPPC_RMAP_REFERENCED (HPTE_R_R << KVMPPC_RMAP_RC_SHIFT) 212 #define KVMPPC_RMAP_CHANGED (HPTE_R_C << KVMPPC_RMAP_RC_SHIFT) 213 #define KVMPPC_RMAP_PRESENT 0x100000000ul 214 #define KVMPPC_RMAP_INDEX 0xfffffffful 215 216 /* Low-order bits in memslot->arch.slot_phys[] */ 217 #define KVMPPC_PAGE_ORDER_MASK 0x1f 218 #define KVMPPC_PAGE_NO_CACHE HPTE_R_I /* 0x20 */ 219 #define KVMPPC_PAGE_WRITETHRU HPTE_R_W /* 0x40 */ 220 #define KVMPPC_GOT_PAGE 0x80 221 222 struct kvm_arch_memory_slot { 223 #ifdef CONFIG_KVM_BOOK3S_64_HV 224 unsigned long *rmap; 225 unsigned long *slot_phys; 226 #endif /* CONFIG_KVM_BOOK3S_64_HV */ 227 }; 228 229 struct kvm_arch { 230 unsigned int lpid; 231 #ifdef CONFIG_KVM_BOOK3S_64_HV 232 unsigned long hpt_virt; 233 struct revmap_entry *revmap; 234 unsigned int host_lpid; 235 unsigned long host_lpcr; 236 unsigned long sdr1; 237 unsigned long host_sdr1; 238 int tlbie_lock; 239 unsigned long lpcr; 240 unsigned long rmor; 241 struct kvmppc_linear_info *rma; 242 unsigned long vrma_slb_v; 243 int rma_setup_done; 244 int using_mmu_notifiers; 245 u32 hpt_order; 246 atomic_t vcpus_running; 247 u32 online_vcores; 248 unsigned long hpt_npte; 249 unsigned long hpt_mask; 250 atomic_t hpte_mod_interest; 251 spinlock_t slot_phys_lock; 252 cpumask_t need_tlb_flush; 253 struct kvmppc_vcore *vcores[KVM_MAX_VCORES]; 254 struct kvmppc_linear_info *hpt_li; 255 #endif /* CONFIG_KVM_BOOK3S_64_HV */ 256 #ifdef CONFIG_PPC_BOOK3S_64 257 struct list_head spapr_tce_tables; 258 #endif 259 }; 260 261 /* 262 * Struct for a virtual core. 263 * Note: entry_exit_count combines an entry count in the bottom 8 bits 264 * and an exit count in the next 8 bits. This is so that we can 265 * atomically increment the entry count iff the exit count is 0 266 * without taking the lock. 267 */ 268 struct kvmppc_vcore { 269 int n_runnable; 270 int n_busy; 271 int num_threads; 272 int entry_exit_count; 273 int n_woken; 274 int nap_count; 275 int napping_threads; 276 u16 pcpu; 277 u16 last_cpu; 278 u8 vcore_state; 279 u8 in_guest; 280 struct list_head runnable_threads; 281 spinlock_t lock; 282 wait_queue_head_t wq; 283 u64 stolen_tb; 284 u64 preempt_tb; 285 struct kvm_vcpu *runner; 286 }; 287 288 #define VCORE_ENTRY_COUNT(vc) ((vc)->entry_exit_count & 0xff) 289 #define VCORE_EXIT_COUNT(vc) ((vc)->entry_exit_count >> 8) 290 291 /* Values for vcore_state */ 292 #define VCORE_INACTIVE 0 293 #define VCORE_SLEEPING 1 294 #define VCORE_STARTING 2 295 #define VCORE_RUNNING 3 296 #define VCORE_EXITING 4 297 298 /* 299 * Struct used to manage memory for a virtual processor area 300 * registered by a PAPR guest. There are three types of area 301 * that a guest can register. 302 */ 303 struct kvmppc_vpa { 304 void *pinned_addr; /* Address in kernel linear mapping */ 305 void *pinned_end; /* End of region */ 306 unsigned long next_gpa; /* Guest phys addr for update */ 307 unsigned long len; /* Number of bytes required */ 308 u8 update_pending; /* 1 => update pinned_addr from next_gpa */ 309 }; 310 311 struct kvmppc_pte { 312 ulong eaddr; 313 u64 vpage; 314 ulong raddr; 315 bool may_read : 1; 316 bool may_write : 1; 317 bool may_execute : 1; 318 }; 319 320 struct kvmppc_mmu { 321 /* book3s_64 only */ 322 void (*slbmte)(struct kvm_vcpu *vcpu, u64 rb, u64 rs); 323 u64 (*slbmfee)(struct kvm_vcpu *vcpu, u64 slb_nr); 324 u64 (*slbmfev)(struct kvm_vcpu *vcpu, u64 slb_nr); 325 void (*slbie)(struct kvm_vcpu *vcpu, u64 slb_nr); 326 void (*slbia)(struct kvm_vcpu *vcpu); 327 /* book3s */ 328 void (*mtsrin)(struct kvm_vcpu *vcpu, u32 srnum, ulong value); 329 u32 (*mfsrin)(struct kvm_vcpu *vcpu, u32 srnum); 330 int (*xlate)(struct kvm_vcpu *vcpu, gva_t eaddr, struct kvmppc_pte *pte, bool data); 331 void (*reset_msr)(struct kvm_vcpu *vcpu); 332 void (*tlbie)(struct kvm_vcpu *vcpu, ulong addr, bool large); 333 int (*esid_to_vsid)(struct kvm_vcpu *vcpu, ulong esid, u64 *vsid); 334 u64 (*ea_to_vp)(struct kvm_vcpu *vcpu, gva_t eaddr, bool data); 335 bool (*is_dcbz32)(struct kvm_vcpu *vcpu); 336 }; 337 338 struct kvmppc_slb { 339 u64 esid; 340 u64 vsid; 341 u64 orige; 342 u64 origv; 343 bool valid : 1; 344 bool Ks : 1; 345 bool Kp : 1; 346 bool nx : 1; 347 bool large : 1; /* PTEs are 16MB */ 348 bool tb : 1; /* 1TB segment */ 349 bool class : 1; 350 }; 351 352 # ifdef CONFIG_PPC_FSL_BOOK3E 353 #define KVMPPC_BOOKE_IAC_NUM 2 354 #define KVMPPC_BOOKE_DAC_NUM 2 355 # else 356 #define KVMPPC_BOOKE_IAC_NUM 4 357 #define KVMPPC_BOOKE_DAC_NUM 2 358 # endif 359 #define KVMPPC_BOOKE_MAX_IAC 4 360 #define KVMPPC_BOOKE_MAX_DAC 2 361 362 struct kvmppc_booke_debug_reg { 363 u32 dbcr0; 364 u32 dbcr1; 365 u32 dbcr2; 366 #ifdef CONFIG_KVM_E500MC 367 u32 dbcr4; 368 #endif 369 u64 iac[KVMPPC_BOOKE_MAX_IAC]; 370 u64 dac[KVMPPC_BOOKE_MAX_DAC]; 371 }; 372 373 struct kvm_vcpu_arch { 374 ulong host_stack; 375 u32 host_pid; 376 #ifdef CONFIG_PPC_BOOK3S 377 struct kvmppc_slb slb[64]; 378 int slb_max; /* 1 + index of last valid entry in slb[] */ 379 int slb_nr; /* total number of entries in SLB */ 380 struct kvmppc_mmu mmu; 381 #endif 382 383 ulong gpr[32]; 384 385 u64 fpr[32]; 386 u64 fpscr; 387 388 #ifdef CONFIG_SPE 389 ulong evr[32]; 390 ulong spefscr; 391 ulong host_spefscr; 392 u64 acc; 393 #endif 394 #ifdef CONFIG_ALTIVEC 395 vector128 vr[32]; 396 vector128 vscr; 397 #endif 398 399 #ifdef CONFIG_VSX 400 u64 vsr[64]; 401 #endif 402 403 #ifdef CONFIG_KVM_BOOKE_HV 404 u32 host_mas4; 405 u32 host_mas6; 406 u32 shadow_epcr; 407 u32 shadow_msrp; 408 u32 eplc; 409 u32 epsc; 410 u32 oldpir; 411 #endif 412 413 #if defined(CONFIG_BOOKE) 414 #if defined(CONFIG_KVM_BOOKE_HV) || defined(CONFIG_64BIT) 415 u32 epcr; 416 #endif 417 #endif 418 419 #ifdef CONFIG_PPC_BOOK3S 420 /* For Gekko paired singles */ 421 u32 qpr[32]; 422 #endif 423 424 ulong pc; 425 ulong ctr; 426 ulong lr; 427 428 ulong xer; 429 u32 cr; 430 431 #ifdef CONFIG_PPC_BOOK3S 432 ulong hflags; 433 ulong guest_owned_ext; 434 ulong purr; 435 ulong spurr; 436 ulong dscr; 437 ulong amr; 438 ulong uamor; 439 u32 ctrl; 440 ulong dabr; 441 ulong cfar; 442 #endif 443 u32 vrsave; /* also USPRG0 */ 444 u32 mmucr; 445 /* shadow_msr is unused for BookE HV */ 446 ulong shadow_msr; 447 ulong csrr0; 448 ulong csrr1; 449 ulong dsrr0; 450 ulong dsrr1; 451 ulong mcsrr0; 452 ulong mcsrr1; 453 ulong mcsr; 454 u32 dec; 455 #ifdef CONFIG_BOOKE 456 u32 decar; 457 #endif 458 u32 tbl; 459 u32 tbu; 460 u32 tcr; 461 ulong tsr; /* we need to perform set/clr_bits() which requires ulong */ 462 u32 ivor[64]; 463 ulong ivpr; 464 u32 pvr; 465 466 u32 shadow_pid; 467 u32 shadow_pid1; 468 u32 pid; 469 u32 swap_pid; 470 471 u32 ccr0; 472 u32 ccr1; 473 u32 dbsr; 474 475 u64 mmcr[3]; 476 u32 pmc[8]; 477 478 #ifdef CONFIG_KVM_EXIT_TIMING 479 struct mutex exit_timing_lock; 480 struct kvmppc_exit_timing timing_exit; 481 struct kvmppc_exit_timing timing_last_enter; 482 u32 last_exit_type; 483 u32 timing_count_type[__NUMBER_OF_KVM_EXIT_TYPES]; 484 u64 timing_sum_duration[__NUMBER_OF_KVM_EXIT_TYPES]; 485 u64 timing_sum_quad_duration[__NUMBER_OF_KVM_EXIT_TYPES]; 486 u64 timing_min_duration[__NUMBER_OF_KVM_EXIT_TYPES]; 487 u64 timing_max_duration[__NUMBER_OF_KVM_EXIT_TYPES]; 488 u64 timing_last_exit; 489 struct dentry *debugfs_exit_timing; 490 #endif 491 492 #ifdef CONFIG_PPC_BOOK3S 493 ulong fault_dar; 494 u32 fault_dsisr; 495 #endif 496 497 #ifdef CONFIG_BOOKE 498 ulong fault_dear; 499 ulong fault_esr; 500 ulong queued_dear; 501 ulong queued_esr; 502 spinlock_t wdt_lock; 503 struct timer_list wdt_timer; 504 u32 tlbcfg[4]; 505 u32 mmucfg; 506 u32 epr; 507 struct kvmppc_booke_debug_reg dbg_reg; 508 #endif 509 gpa_t paddr_accessed; 510 gva_t vaddr_accessed; 511 512 u8 io_gpr; /* GPR used as IO source/target */ 513 u8 mmio_is_bigendian; 514 u8 mmio_sign_extend; 515 u8 dcr_needed; 516 u8 dcr_is_write; 517 u8 osi_needed; 518 u8 osi_enabled; 519 u8 papr_enabled; 520 u8 watchdog_enabled; 521 u8 sane; 522 u8 cpu_type; 523 u8 hcall_needed; 524 u8 epr_enabled; 525 u8 epr_needed; 526 527 u32 cpr0_cfgaddr; /* holds the last set cpr0_cfgaddr */ 528 529 struct hrtimer dec_timer; 530 struct tasklet_struct tasklet; 531 u64 dec_jiffies; 532 u64 dec_expires; 533 unsigned long pending_exceptions; 534 u8 ceded; 535 u8 prodded; 536 u32 last_inst; 537 538 wait_queue_head_t *wqp; 539 struct kvmppc_vcore *vcore; 540 int ret; 541 int trap; 542 int state; 543 int ptid; 544 bool timer_running; 545 wait_queue_head_t cpu_run; 546 547 struct kvm_vcpu_arch_shared *shared; 548 unsigned long magic_page_pa; /* phys addr to map the magic page to */ 549 unsigned long magic_page_ea; /* effect. addr to map the magic page to */ 550 551 #ifdef CONFIG_KVM_BOOK3S_64_HV 552 struct kvm_vcpu_arch_shared shregs; 553 554 unsigned long pgfault_addr; 555 long pgfault_index; 556 unsigned long pgfault_hpte[2]; 557 558 struct list_head run_list; 559 struct task_struct *run_task; 560 struct kvm_run *kvm_run; 561 pgd_t *pgdir; 562 563 spinlock_t vpa_update_lock; 564 struct kvmppc_vpa vpa; 565 struct kvmppc_vpa dtl; 566 struct dtl_entry *dtl_ptr; 567 unsigned long dtl_index; 568 u64 stolen_logged; 569 struct kvmppc_vpa slb_shadow; 570 571 spinlock_t tbacct_lock; 572 u64 busy_stolen; 573 u64 busy_preempt; 574 #endif 575 }; 576 577 /* Values for vcpu->arch.state */ 578 #define KVMPPC_VCPU_NOTREADY 0 579 #define KVMPPC_VCPU_RUNNABLE 1 580 #define KVMPPC_VCPU_BUSY_IN_HOST 2 581 582 /* Values for vcpu->arch.io_gpr */ 583 #define KVM_MMIO_REG_MASK 0x001f 584 #define KVM_MMIO_REG_EXT_MASK 0xffe0 585 #define KVM_MMIO_REG_GPR 0x0000 586 #define KVM_MMIO_REG_FPR 0x0020 587 #define KVM_MMIO_REG_QPR 0x0040 588 #define KVM_MMIO_REG_FQPR 0x0060 589 590 #define __KVM_HAVE_ARCH_WQP 591 592 #endif /* __POWERPC_KVM_HOST_H__ */ 593