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 /* These values are internal and can be increased later */ 48 #define KVM_NR_IRQCHIPS 1 49 #define KVM_IRQCHIP_NUM_PINS 256 50 51 #if !defined(CONFIG_KVM_440) 52 #include <linux/mmu_notifier.h> 53 54 #define KVM_ARCH_WANT_MMU_NOTIFIER 55 56 struct kvm; 57 extern int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); 58 extern int kvm_unmap_hva_range(struct kvm *kvm, 59 unsigned long start, unsigned long end); 60 extern int kvm_age_hva(struct kvm *kvm, unsigned long hva); 61 extern int kvm_test_age_hva(struct kvm *kvm, unsigned long hva); 62 extern void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); 63 64 #endif 65 66 /* We don't currently support large pages. */ 67 #define KVM_HPAGE_GFN_SHIFT(x) 0 68 #define KVM_NR_PAGE_SIZES 1 69 #define KVM_PAGES_PER_HPAGE(x) (1UL<<31) 70 71 #define HPTEG_CACHE_NUM (1 << 15) 72 #define HPTEG_HASH_BITS_PTE 13 73 #define HPTEG_HASH_BITS_PTE_LONG 12 74 #define HPTEG_HASH_BITS_VPTE 13 75 #define HPTEG_HASH_BITS_VPTE_LONG 5 76 #define HPTEG_HASH_NUM_PTE (1 << HPTEG_HASH_BITS_PTE) 77 #define HPTEG_HASH_NUM_PTE_LONG (1 << HPTEG_HASH_BITS_PTE_LONG) 78 #define HPTEG_HASH_NUM_VPTE (1 << HPTEG_HASH_BITS_VPTE) 79 #define HPTEG_HASH_NUM_VPTE_LONG (1 << HPTEG_HASH_BITS_VPTE_LONG) 80 81 /* Physical Address Mask - allowed range of real mode RAM access */ 82 #define KVM_PAM 0x0fffffffffffffffULL 83 84 struct kvm; 85 struct kvm_run; 86 struct kvm_vcpu; 87 88 struct lppaca; 89 struct slb_shadow; 90 struct dtl_entry; 91 92 struct kvm_vm_stat { 93 u32 remote_tlb_flush; 94 }; 95 96 struct kvm_vcpu_stat { 97 u32 sum_exits; 98 u32 mmio_exits; 99 u32 dcr_exits; 100 u32 signal_exits; 101 u32 light_exits; 102 /* Account for special types of light exits: */ 103 u32 itlb_real_miss_exits; 104 u32 itlb_virt_miss_exits; 105 u32 dtlb_real_miss_exits; 106 u32 dtlb_virt_miss_exits; 107 u32 syscall_exits; 108 u32 isi_exits; 109 u32 dsi_exits; 110 u32 emulated_inst_exits; 111 u32 dec_exits; 112 u32 ext_intr_exits; 113 u32 halt_wakeup; 114 u32 dbell_exits; 115 u32 gdbell_exits; 116 #ifdef CONFIG_PPC_BOOK3S 117 u32 pf_storage; 118 u32 pf_instruc; 119 u32 sp_storage; 120 u32 sp_instruc; 121 u32 queue_intr; 122 u32 ld; 123 u32 ld_slow; 124 u32 st; 125 u32 st_slow; 126 #endif 127 }; 128 129 enum kvm_exit_types { 130 MMIO_EXITS, 131 DCR_EXITS, 132 SIGNAL_EXITS, 133 ITLB_REAL_MISS_EXITS, 134 ITLB_VIRT_MISS_EXITS, 135 DTLB_REAL_MISS_EXITS, 136 DTLB_VIRT_MISS_EXITS, 137 SYSCALL_EXITS, 138 ISI_EXITS, 139 DSI_EXITS, 140 EMULATED_INST_EXITS, 141 EMULATED_MTMSRWE_EXITS, 142 EMULATED_WRTEE_EXITS, 143 EMULATED_MTSPR_EXITS, 144 EMULATED_MFSPR_EXITS, 145 EMULATED_MTMSR_EXITS, 146 EMULATED_MFMSR_EXITS, 147 EMULATED_TLBSX_EXITS, 148 EMULATED_TLBWE_EXITS, 149 EMULATED_RFI_EXITS, 150 EMULATED_RFCI_EXITS, 151 DEC_EXITS, 152 EXT_INTR_EXITS, 153 HALT_WAKEUP, 154 USR_PR_INST, 155 FP_UNAVAIL, 156 DEBUG_EXITS, 157 TIMEINGUEST, 158 DBELL_EXITS, 159 GDBELL_EXITS, 160 __NUMBER_OF_KVM_EXIT_TYPES 161 }; 162 163 /* allow access to big endian 32bit upper/lower parts and 64bit var */ 164 struct kvmppc_exit_timing { 165 union { 166 u64 tv64; 167 struct { 168 u32 tbu, tbl; 169 } tv32; 170 }; 171 }; 172 173 struct kvmppc_pginfo { 174 unsigned long pfn; 175 atomic_t refcnt; 176 }; 177 178 struct kvmppc_spapr_tce_table { 179 struct list_head list; 180 struct kvm *kvm; 181 u64 liobn; 182 u32 window_size; 183 struct page *pages[0]; 184 }; 185 186 struct kvmppc_linear_info { 187 void *base_virt; 188 unsigned long base_pfn; 189 unsigned long npages; 190 struct list_head list; 191 atomic_t use_count; 192 int type; 193 }; 194 195 /* XICS components, defined in book3s_xics.c */ 196 struct kvmppc_xics; 197 struct kvmppc_icp; 198 199 /* 200 * The reverse mapping array has one entry for each HPTE, 201 * which stores the guest's view of the second word of the HPTE 202 * (including the guest physical address of the mapping), 203 * plus forward and backward pointers in a doubly-linked ring 204 * of HPTEs that map the same host page. The pointers in this 205 * ring are 32-bit HPTE indexes, to save space. 206 */ 207 struct revmap_entry { 208 unsigned long guest_rpte; 209 unsigned int forw, back; 210 }; 211 212 /* 213 * We use the top bit of each memslot->arch.rmap entry as a lock bit, 214 * and bit 32 as a present flag. The bottom 32 bits are the 215 * index in the guest HPT of a HPTE that points to the page. 216 */ 217 #define KVMPPC_RMAP_LOCK_BIT 63 218 #define KVMPPC_RMAP_RC_SHIFT 32 219 #define KVMPPC_RMAP_REFERENCED (HPTE_R_R << KVMPPC_RMAP_RC_SHIFT) 220 #define KVMPPC_RMAP_CHANGED (HPTE_R_C << KVMPPC_RMAP_RC_SHIFT) 221 #define KVMPPC_RMAP_PRESENT 0x100000000ul 222 #define KVMPPC_RMAP_INDEX 0xfffffffful 223 224 /* Low-order bits in memslot->arch.slot_phys[] */ 225 #define KVMPPC_PAGE_ORDER_MASK 0x1f 226 #define KVMPPC_PAGE_NO_CACHE HPTE_R_I /* 0x20 */ 227 #define KVMPPC_PAGE_WRITETHRU HPTE_R_W /* 0x40 */ 228 #define KVMPPC_GOT_PAGE 0x80 229 230 struct kvm_arch_memory_slot { 231 #ifdef CONFIG_KVM_BOOK3S_64_HV 232 unsigned long *rmap; 233 unsigned long *slot_phys; 234 #endif /* CONFIG_KVM_BOOK3S_64_HV */ 235 }; 236 237 struct kvm_arch { 238 unsigned int lpid; 239 #ifdef CONFIG_KVM_BOOK3S_64_HV 240 unsigned long hpt_virt; 241 struct revmap_entry *revmap; 242 unsigned int host_lpid; 243 unsigned long host_lpcr; 244 unsigned long sdr1; 245 unsigned long host_sdr1; 246 int tlbie_lock; 247 unsigned long lpcr; 248 unsigned long rmor; 249 struct kvmppc_linear_info *rma; 250 unsigned long vrma_slb_v; 251 int rma_setup_done; 252 int using_mmu_notifiers; 253 u32 hpt_order; 254 atomic_t vcpus_running; 255 u32 online_vcores; 256 unsigned long hpt_npte; 257 unsigned long hpt_mask; 258 atomic_t hpte_mod_interest; 259 spinlock_t slot_phys_lock; 260 cpumask_t need_tlb_flush; 261 struct kvmppc_vcore *vcores[KVM_MAX_VCORES]; 262 struct kvmppc_linear_info *hpt_li; 263 #endif /* CONFIG_KVM_BOOK3S_64_HV */ 264 #ifdef CONFIG_PPC_BOOK3S_64 265 struct list_head spapr_tce_tables; 266 struct list_head rtas_tokens; 267 #endif 268 #ifdef CONFIG_KVM_MPIC 269 struct openpic *mpic; 270 #endif 271 #ifdef CONFIG_KVM_XICS 272 struct kvmppc_xics *xics; 273 #endif 274 }; 275 276 /* 277 * Struct for a virtual core. 278 * Note: entry_exit_count combines an entry count in the bottom 8 bits 279 * and an exit count in the next 8 bits. This is so that we can 280 * atomically increment the entry count iff the exit count is 0 281 * without taking the lock. 282 */ 283 struct kvmppc_vcore { 284 int n_runnable; 285 int n_busy; 286 int num_threads; 287 int entry_exit_count; 288 int n_woken; 289 int nap_count; 290 int napping_threads; 291 u16 pcpu; 292 u16 last_cpu; 293 u8 vcore_state; 294 u8 in_guest; 295 struct list_head runnable_threads; 296 spinlock_t lock; 297 wait_queue_head_t wq; 298 u64 stolen_tb; 299 u64 preempt_tb; 300 struct kvm_vcpu *runner; 301 }; 302 303 #define VCORE_ENTRY_COUNT(vc) ((vc)->entry_exit_count & 0xff) 304 #define VCORE_EXIT_COUNT(vc) ((vc)->entry_exit_count >> 8) 305 306 /* Values for vcore_state */ 307 #define VCORE_INACTIVE 0 308 #define VCORE_SLEEPING 1 309 #define VCORE_STARTING 2 310 #define VCORE_RUNNING 3 311 #define VCORE_EXITING 4 312 313 /* 314 * Struct used to manage memory for a virtual processor area 315 * registered by a PAPR guest. There are three types of area 316 * that a guest can register. 317 */ 318 struct kvmppc_vpa { 319 unsigned long gpa; /* Current guest phys addr */ 320 void *pinned_addr; /* Address in kernel linear mapping */ 321 void *pinned_end; /* End of region */ 322 unsigned long next_gpa; /* Guest phys addr for update */ 323 unsigned long len; /* Number of bytes required */ 324 u8 update_pending; /* 1 => update pinned_addr from next_gpa */ 325 bool dirty; /* true => area has been modified by kernel */ 326 }; 327 328 struct kvmppc_pte { 329 ulong eaddr; 330 u64 vpage; 331 ulong raddr; 332 bool may_read : 1; 333 bool may_write : 1; 334 bool may_execute : 1; 335 }; 336 337 struct kvmppc_mmu { 338 /* book3s_64 only */ 339 void (*slbmte)(struct kvm_vcpu *vcpu, u64 rb, u64 rs); 340 u64 (*slbmfee)(struct kvm_vcpu *vcpu, u64 slb_nr); 341 u64 (*slbmfev)(struct kvm_vcpu *vcpu, u64 slb_nr); 342 void (*slbie)(struct kvm_vcpu *vcpu, u64 slb_nr); 343 void (*slbia)(struct kvm_vcpu *vcpu); 344 /* book3s */ 345 void (*mtsrin)(struct kvm_vcpu *vcpu, u32 srnum, ulong value); 346 u32 (*mfsrin)(struct kvm_vcpu *vcpu, u32 srnum); 347 int (*xlate)(struct kvm_vcpu *vcpu, gva_t eaddr, struct kvmppc_pte *pte, bool data); 348 void (*reset_msr)(struct kvm_vcpu *vcpu); 349 void (*tlbie)(struct kvm_vcpu *vcpu, ulong addr, bool large); 350 int (*esid_to_vsid)(struct kvm_vcpu *vcpu, ulong esid, u64 *vsid); 351 u64 (*ea_to_vp)(struct kvm_vcpu *vcpu, gva_t eaddr, bool data); 352 bool (*is_dcbz32)(struct kvm_vcpu *vcpu); 353 }; 354 355 struct kvmppc_slb { 356 u64 esid; 357 u64 vsid; 358 u64 orige; 359 u64 origv; 360 bool valid : 1; 361 bool Ks : 1; 362 bool Kp : 1; 363 bool nx : 1; 364 bool large : 1; /* PTEs are 16MB */ 365 bool tb : 1; /* 1TB segment */ 366 bool class : 1; 367 }; 368 369 # ifdef CONFIG_PPC_FSL_BOOK3E 370 #define KVMPPC_BOOKE_IAC_NUM 2 371 #define KVMPPC_BOOKE_DAC_NUM 2 372 # else 373 #define KVMPPC_BOOKE_IAC_NUM 4 374 #define KVMPPC_BOOKE_DAC_NUM 2 375 # endif 376 #define KVMPPC_BOOKE_MAX_IAC 4 377 #define KVMPPC_BOOKE_MAX_DAC 2 378 379 /* KVMPPC_EPR_USER takes precedence over KVMPPC_EPR_KERNEL */ 380 #define KVMPPC_EPR_NONE 0 /* EPR not supported */ 381 #define KVMPPC_EPR_USER 1 /* exit to userspace to fill EPR */ 382 #define KVMPPC_EPR_KERNEL 2 /* in-kernel irqchip */ 383 384 struct kvmppc_booke_debug_reg { 385 u32 dbcr0; 386 u32 dbcr1; 387 u32 dbcr2; 388 #ifdef CONFIG_KVM_E500MC 389 u32 dbcr4; 390 #endif 391 u64 iac[KVMPPC_BOOKE_MAX_IAC]; 392 u64 dac[KVMPPC_BOOKE_MAX_DAC]; 393 }; 394 395 #define KVMPPC_IRQ_DEFAULT 0 396 #define KVMPPC_IRQ_MPIC 1 397 #define KVMPPC_IRQ_XICS 2 398 399 struct openpic; 400 401 struct kvm_vcpu_arch { 402 ulong host_stack; 403 u32 host_pid; 404 #ifdef CONFIG_PPC_BOOK3S 405 struct kvmppc_slb slb[64]; 406 int slb_max; /* 1 + index of last valid entry in slb[] */ 407 int slb_nr; /* total number of entries in SLB */ 408 struct kvmppc_mmu mmu; 409 #endif 410 411 ulong gpr[32]; 412 413 u64 fpr[32]; 414 u64 fpscr; 415 416 #ifdef CONFIG_SPE 417 ulong evr[32]; 418 ulong spefscr; 419 ulong host_spefscr; 420 u64 acc; 421 #endif 422 #ifdef CONFIG_ALTIVEC 423 vector128 vr[32]; 424 vector128 vscr; 425 #endif 426 427 #ifdef CONFIG_VSX 428 u64 vsr[64]; 429 #endif 430 431 #ifdef CONFIG_KVM_BOOKE_HV 432 u32 host_mas4; 433 u32 host_mas6; 434 u32 shadow_epcr; 435 u32 shadow_msrp; 436 u32 eplc; 437 u32 epsc; 438 u32 oldpir; 439 #endif 440 441 #if defined(CONFIG_BOOKE) 442 #if defined(CONFIG_KVM_BOOKE_HV) || defined(CONFIG_64BIT) 443 u32 epcr; 444 #endif 445 #endif 446 447 #ifdef CONFIG_PPC_BOOK3S 448 /* For Gekko paired singles */ 449 u32 qpr[32]; 450 #endif 451 452 ulong pc; 453 ulong ctr; 454 ulong lr; 455 456 ulong xer; 457 u32 cr; 458 459 #ifdef CONFIG_PPC_BOOK3S 460 ulong hflags; 461 ulong guest_owned_ext; 462 ulong purr; 463 ulong spurr; 464 ulong dscr; 465 ulong amr; 466 ulong uamor; 467 u32 ctrl; 468 ulong dabr; 469 ulong cfar; 470 #endif 471 u32 vrsave; /* also USPRG0 */ 472 u32 mmucr; 473 /* shadow_msr is unused for BookE HV */ 474 ulong shadow_msr; 475 ulong csrr0; 476 ulong csrr1; 477 ulong dsrr0; 478 ulong dsrr1; 479 ulong mcsrr0; 480 ulong mcsrr1; 481 ulong mcsr; 482 u32 dec; 483 #ifdef CONFIG_BOOKE 484 u32 decar; 485 #endif 486 u32 tbl; 487 u32 tbu; 488 u32 tcr; 489 ulong tsr; /* we need to perform set/clr_bits() which requires ulong */ 490 u32 ivor[64]; 491 ulong ivpr; 492 u32 pvr; 493 494 u32 shadow_pid; 495 u32 shadow_pid1; 496 u32 pid; 497 u32 swap_pid; 498 499 u32 ccr0; 500 u32 ccr1; 501 u32 dbsr; 502 503 u64 mmcr[3]; 504 u32 pmc[8]; 505 506 #ifdef CONFIG_KVM_EXIT_TIMING 507 struct mutex exit_timing_lock; 508 struct kvmppc_exit_timing timing_exit; 509 struct kvmppc_exit_timing timing_last_enter; 510 u32 last_exit_type; 511 u32 timing_count_type[__NUMBER_OF_KVM_EXIT_TYPES]; 512 u64 timing_sum_duration[__NUMBER_OF_KVM_EXIT_TYPES]; 513 u64 timing_sum_quad_duration[__NUMBER_OF_KVM_EXIT_TYPES]; 514 u64 timing_min_duration[__NUMBER_OF_KVM_EXIT_TYPES]; 515 u64 timing_max_duration[__NUMBER_OF_KVM_EXIT_TYPES]; 516 u64 timing_last_exit; 517 struct dentry *debugfs_exit_timing; 518 #endif 519 520 #ifdef CONFIG_PPC_BOOK3S 521 ulong fault_dar; 522 u32 fault_dsisr; 523 #endif 524 525 #ifdef CONFIG_BOOKE 526 ulong fault_dear; 527 ulong fault_esr; 528 ulong queued_dear; 529 ulong queued_esr; 530 spinlock_t wdt_lock; 531 struct timer_list wdt_timer; 532 u32 tlbcfg[4]; 533 u32 tlbps[4]; 534 u32 mmucfg; 535 u32 eptcfg; 536 u32 epr; 537 u32 crit_save; 538 struct kvmppc_booke_debug_reg dbg_reg; 539 #endif 540 gpa_t paddr_accessed; 541 gva_t vaddr_accessed; 542 543 u8 io_gpr; /* GPR used as IO source/target */ 544 u8 mmio_is_bigendian; 545 u8 mmio_sign_extend; 546 u8 dcr_needed; 547 u8 dcr_is_write; 548 u8 osi_needed; 549 u8 osi_enabled; 550 u8 papr_enabled; 551 u8 watchdog_enabled; 552 u8 sane; 553 u8 cpu_type; 554 u8 hcall_needed; 555 u8 epr_flags; /* KVMPPC_EPR_xxx */ 556 u8 epr_needed; 557 558 u32 cpr0_cfgaddr; /* holds the last set cpr0_cfgaddr */ 559 560 struct hrtimer dec_timer; 561 struct tasklet_struct tasklet; 562 u64 dec_jiffies; 563 u64 dec_expires; 564 unsigned long pending_exceptions; 565 u8 ceded; 566 u8 prodded; 567 u32 last_inst; 568 569 wait_queue_head_t *wqp; 570 struct kvmppc_vcore *vcore; 571 int ret; 572 int trap; 573 int state; 574 int ptid; 575 bool timer_running; 576 wait_queue_head_t cpu_run; 577 578 struct kvm_vcpu_arch_shared *shared; 579 unsigned long magic_page_pa; /* phys addr to map the magic page to */ 580 unsigned long magic_page_ea; /* effect. addr to map the magic page to */ 581 582 int irq_type; /* one of KVM_IRQ_* */ 583 int irq_cpu_id; 584 struct openpic *mpic; /* KVM_IRQ_MPIC */ 585 #ifdef CONFIG_KVM_XICS 586 struct kvmppc_icp *icp; /* XICS presentation controller */ 587 #endif 588 589 #ifdef CONFIG_KVM_BOOK3S_64_HV 590 struct kvm_vcpu_arch_shared shregs; 591 592 unsigned long pgfault_addr; 593 long pgfault_index; 594 unsigned long pgfault_hpte[2]; 595 596 struct list_head run_list; 597 struct task_struct *run_task; 598 struct kvm_run *kvm_run; 599 pgd_t *pgdir; 600 601 spinlock_t vpa_update_lock; 602 struct kvmppc_vpa vpa; 603 struct kvmppc_vpa dtl; 604 struct dtl_entry *dtl_ptr; 605 unsigned long dtl_index; 606 u64 stolen_logged; 607 struct kvmppc_vpa slb_shadow; 608 609 spinlock_t tbacct_lock; 610 u64 busy_stolen; 611 u64 busy_preempt; 612 #endif 613 }; 614 615 /* Values for vcpu->arch.state */ 616 #define KVMPPC_VCPU_NOTREADY 0 617 #define KVMPPC_VCPU_RUNNABLE 1 618 #define KVMPPC_VCPU_BUSY_IN_HOST 2 619 620 /* Values for vcpu->arch.io_gpr */ 621 #define KVM_MMIO_REG_MASK 0x001f 622 #define KVM_MMIO_REG_EXT_MASK 0xffe0 623 #define KVM_MMIO_REG_GPR 0x0000 624 #define KVM_MMIO_REG_FPR 0x0020 625 #define KVM_MMIO_REG_QPR 0x0040 626 #define KVM_MMIO_REG_FQPR 0x0060 627 628 #define __KVM_HAVE_ARCH_WQP 629 #define __KVM_HAVE_CREATE_DEVICE 630 631 #endif /* __POWERPC_KVM_HOST_H__ */ 632