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