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 kvm_rma_info { 187 atomic_t use_count; 188 unsigned long base_pfn; 189 }; 190 191 /* XICS components, defined in book3s_xics.c */ 192 struct kvmppc_xics; 193 struct kvmppc_icp; 194 195 /* 196 * The reverse mapping array has one entry for each HPTE, 197 * which stores the guest's view of the second word of the HPTE 198 * (including the guest physical address of the mapping), 199 * plus forward and backward pointers in a doubly-linked ring 200 * of HPTEs that map the same host page. The pointers in this 201 * ring are 32-bit HPTE indexes, to save space. 202 */ 203 struct revmap_entry { 204 unsigned long guest_rpte; 205 unsigned int forw, back; 206 }; 207 208 /* 209 * We use the top bit of each memslot->arch.rmap entry as a lock bit, 210 * and bit 32 as a present flag. The bottom 32 bits are the 211 * index in the guest HPT of a HPTE that points to the page. 212 */ 213 #define KVMPPC_RMAP_LOCK_BIT 63 214 #define KVMPPC_RMAP_RC_SHIFT 32 215 #define KVMPPC_RMAP_REFERENCED (HPTE_R_R << KVMPPC_RMAP_RC_SHIFT) 216 #define KVMPPC_RMAP_CHANGED (HPTE_R_C << KVMPPC_RMAP_RC_SHIFT) 217 #define KVMPPC_RMAP_PRESENT 0x100000000ul 218 #define KVMPPC_RMAP_INDEX 0xfffffffful 219 220 /* Low-order bits in memslot->arch.slot_phys[] */ 221 #define KVMPPC_PAGE_ORDER_MASK 0x1f 222 #define KVMPPC_PAGE_NO_CACHE HPTE_R_I /* 0x20 */ 223 #define KVMPPC_PAGE_WRITETHRU HPTE_R_W /* 0x40 */ 224 #define KVMPPC_GOT_PAGE 0x80 225 226 struct kvm_arch_memory_slot { 227 #ifdef CONFIG_KVM_BOOK3S_64_HV 228 unsigned long *rmap; 229 unsigned long *slot_phys; 230 #endif /* CONFIG_KVM_BOOK3S_64_HV */ 231 }; 232 233 struct kvm_arch { 234 unsigned int lpid; 235 #ifdef CONFIG_KVM_BOOK3S_64_HV 236 unsigned long hpt_virt; 237 struct revmap_entry *revmap; 238 unsigned int host_lpid; 239 unsigned long host_lpcr; 240 unsigned long sdr1; 241 unsigned long host_sdr1; 242 int tlbie_lock; 243 unsigned long lpcr; 244 unsigned long rmor; 245 struct kvm_rma_info *rma; 246 unsigned long vrma_slb_v; 247 int rma_setup_done; 248 int using_mmu_notifiers; 249 u32 hpt_order; 250 atomic_t vcpus_running; 251 u32 online_vcores; 252 unsigned long hpt_npte; 253 unsigned long hpt_mask; 254 atomic_t hpte_mod_interest; 255 spinlock_t slot_phys_lock; 256 cpumask_t need_tlb_flush; 257 struct kvmppc_vcore *vcores[KVM_MAX_VCORES]; 258 int hpt_cma_alloc; 259 #endif /* CONFIG_KVM_BOOK3S_64_HV */ 260 #ifdef CONFIG_PPC_BOOK3S_64 261 struct list_head spapr_tce_tables; 262 struct list_head rtas_tokens; 263 #endif 264 #ifdef CONFIG_KVM_MPIC 265 struct openpic *mpic; 266 #endif 267 #ifdef CONFIG_KVM_XICS 268 struct kvmppc_xics *xics; 269 #endif 270 }; 271 272 /* 273 * Struct for a virtual core. 274 * Note: entry_exit_count combines an entry count in the bottom 8 bits 275 * and an exit count in the next 8 bits. This is so that we can 276 * atomically increment the entry count iff the exit count is 0 277 * without taking the lock. 278 */ 279 struct kvmppc_vcore { 280 int n_runnable; 281 int n_busy; 282 int num_threads; 283 int entry_exit_count; 284 int n_woken; 285 int nap_count; 286 int napping_threads; 287 u16 pcpu; 288 u16 last_cpu; 289 u8 vcore_state; 290 u8 in_guest; 291 struct list_head runnable_threads; 292 spinlock_t lock; 293 wait_queue_head_t wq; 294 u64 stolen_tb; 295 u64 preempt_tb; 296 struct kvm_vcpu *runner; 297 }; 298 299 #define VCORE_ENTRY_COUNT(vc) ((vc)->entry_exit_count & 0xff) 300 #define VCORE_EXIT_COUNT(vc) ((vc)->entry_exit_count >> 8) 301 302 /* Values for vcore_state */ 303 #define VCORE_INACTIVE 0 304 #define VCORE_SLEEPING 1 305 #define VCORE_STARTING 2 306 #define VCORE_RUNNING 3 307 #define VCORE_EXITING 4 308 309 /* 310 * Struct used to manage memory for a virtual processor area 311 * registered by a PAPR guest. There are three types of area 312 * that a guest can register. 313 */ 314 struct kvmppc_vpa { 315 unsigned long gpa; /* Current guest phys addr */ 316 void *pinned_addr; /* Address in kernel linear mapping */ 317 void *pinned_end; /* End of region */ 318 unsigned long next_gpa; /* Guest phys addr for update */ 319 unsigned long len; /* Number of bytes required */ 320 u8 update_pending; /* 1 => update pinned_addr from next_gpa */ 321 bool dirty; /* true => area has been modified by kernel */ 322 }; 323 324 struct kvmppc_pte { 325 ulong eaddr; 326 u64 vpage; 327 ulong raddr; 328 bool may_read : 1; 329 bool may_write : 1; 330 bool may_execute : 1; 331 }; 332 333 struct kvmppc_mmu { 334 /* book3s_64 only */ 335 void (*slbmte)(struct kvm_vcpu *vcpu, u64 rb, u64 rs); 336 u64 (*slbmfee)(struct kvm_vcpu *vcpu, u64 slb_nr); 337 u64 (*slbmfev)(struct kvm_vcpu *vcpu, u64 slb_nr); 338 void (*slbie)(struct kvm_vcpu *vcpu, u64 slb_nr); 339 void (*slbia)(struct kvm_vcpu *vcpu); 340 /* book3s */ 341 void (*mtsrin)(struct kvm_vcpu *vcpu, u32 srnum, ulong value); 342 u32 (*mfsrin)(struct kvm_vcpu *vcpu, u32 srnum); 343 int (*xlate)(struct kvm_vcpu *vcpu, gva_t eaddr, struct kvmppc_pte *pte, bool data); 344 void (*reset_msr)(struct kvm_vcpu *vcpu); 345 void (*tlbie)(struct kvm_vcpu *vcpu, ulong addr, bool large); 346 int (*esid_to_vsid)(struct kvm_vcpu *vcpu, ulong esid, u64 *vsid); 347 u64 (*ea_to_vp)(struct kvm_vcpu *vcpu, gva_t eaddr, bool data); 348 bool (*is_dcbz32)(struct kvm_vcpu *vcpu); 349 }; 350 351 struct kvmppc_slb { 352 u64 esid; 353 u64 vsid; 354 u64 orige; 355 u64 origv; 356 bool valid : 1; 357 bool Ks : 1; 358 bool Kp : 1; 359 bool nx : 1; 360 bool large : 1; /* PTEs are 16MB */ 361 bool tb : 1; /* 1TB segment */ 362 bool class : 1; 363 }; 364 365 # ifdef CONFIG_PPC_FSL_BOOK3E 366 #define KVMPPC_BOOKE_IAC_NUM 2 367 #define KVMPPC_BOOKE_DAC_NUM 2 368 # else 369 #define KVMPPC_BOOKE_IAC_NUM 4 370 #define KVMPPC_BOOKE_DAC_NUM 2 371 # endif 372 #define KVMPPC_BOOKE_MAX_IAC 4 373 #define KVMPPC_BOOKE_MAX_DAC 2 374 375 /* KVMPPC_EPR_USER takes precedence over KVMPPC_EPR_KERNEL */ 376 #define KVMPPC_EPR_NONE 0 /* EPR not supported */ 377 #define KVMPPC_EPR_USER 1 /* exit to userspace to fill EPR */ 378 #define KVMPPC_EPR_KERNEL 2 /* in-kernel irqchip */ 379 380 struct kvmppc_booke_debug_reg { 381 u32 dbcr0; 382 u32 dbcr1; 383 u32 dbcr2; 384 #ifdef CONFIG_KVM_E500MC 385 u32 dbcr4; 386 #endif 387 u64 iac[KVMPPC_BOOKE_MAX_IAC]; 388 u64 dac[KVMPPC_BOOKE_MAX_DAC]; 389 }; 390 391 #define KVMPPC_IRQ_DEFAULT 0 392 #define KVMPPC_IRQ_MPIC 1 393 #define KVMPPC_IRQ_XICS 2 394 395 struct openpic; 396 397 struct kvm_vcpu_arch { 398 ulong host_stack; 399 u32 host_pid; 400 #ifdef CONFIG_PPC_BOOK3S 401 struct kvmppc_slb slb[64]; 402 int slb_max; /* 1 + index of last valid entry in slb[] */ 403 int slb_nr; /* total number of entries in SLB */ 404 struct kvmppc_mmu mmu; 405 #endif 406 407 ulong gpr[32]; 408 409 u64 fpr[32]; 410 u64 fpscr; 411 412 #ifdef CONFIG_SPE 413 ulong evr[32]; 414 ulong spefscr; 415 ulong host_spefscr; 416 u64 acc; 417 #endif 418 #ifdef CONFIG_ALTIVEC 419 vector128 vr[32]; 420 vector128 vscr; 421 #endif 422 423 #ifdef CONFIG_VSX 424 u64 vsr[64]; 425 #endif 426 427 #ifdef CONFIG_KVM_BOOKE_HV 428 u32 host_mas4; 429 u32 host_mas6; 430 u32 shadow_epcr; 431 u32 shadow_msrp; 432 u32 eplc; 433 u32 epsc; 434 u32 oldpir; 435 #endif 436 437 #if defined(CONFIG_BOOKE) 438 #if defined(CONFIG_KVM_BOOKE_HV) || defined(CONFIG_64BIT) 439 u32 epcr; 440 #endif 441 #endif 442 443 #ifdef CONFIG_PPC_BOOK3S 444 /* For Gekko paired singles */ 445 u32 qpr[32]; 446 #endif 447 448 ulong pc; 449 ulong ctr; 450 ulong lr; 451 452 ulong xer; 453 u32 cr; 454 455 #ifdef CONFIG_PPC_BOOK3S 456 ulong hflags; 457 ulong guest_owned_ext; 458 ulong purr; 459 ulong spurr; 460 ulong dscr; 461 ulong amr; 462 ulong uamor; 463 u32 ctrl; 464 ulong dabr; 465 ulong cfar; 466 #endif 467 u32 vrsave; /* also USPRG0 */ 468 u32 mmucr; 469 /* shadow_msr is unused for BookE HV */ 470 ulong shadow_msr; 471 ulong csrr0; 472 ulong csrr1; 473 ulong dsrr0; 474 ulong dsrr1; 475 ulong mcsrr0; 476 ulong mcsrr1; 477 ulong mcsr; 478 u32 dec; 479 #ifdef CONFIG_BOOKE 480 u32 decar; 481 #endif 482 u32 tbl; 483 u32 tbu; 484 u32 tcr; 485 ulong tsr; /* we need to perform set/clr_bits() which requires ulong */ 486 u32 ivor[64]; 487 ulong ivpr; 488 u32 pvr; 489 490 u32 shadow_pid; 491 u32 shadow_pid1; 492 u32 pid; 493 u32 swap_pid; 494 495 u32 ccr0; 496 u32 ccr1; 497 u32 dbsr; 498 499 u64 mmcr[3]; 500 u32 pmc[8]; 501 502 #ifdef CONFIG_KVM_EXIT_TIMING 503 struct mutex exit_timing_lock; 504 struct kvmppc_exit_timing timing_exit; 505 struct kvmppc_exit_timing timing_last_enter; 506 u32 last_exit_type; 507 u32 timing_count_type[__NUMBER_OF_KVM_EXIT_TYPES]; 508 u64 timing_sum_duration[__NUMBER_OF_KVM_EXIT_TYPES]; 509 u64 timing_sum_quad_duration[__NUMBER_OF_KVM_EXIT_TYPES]; 510 u64 timing_min_duration[__NUMBER_OF_KVM_EXIT_TYPES]; 511 u64 timing_max_duration[__NUMBER_OF_KVM_EXIT_TYPES]; 512 u64 timing_last_exit; 513 struct dentry *debugfs_exit_timing; 514 #endif 515 516 #ifdef CONFIG_PPC_BOOK3S 517 ulong fault_dar; 518 u32 fault_dsisr; 519 #endif 520 521 #ifdef CONFIG_BOOKE 522 ulong fault_dear; 523 ulong fault_esr; 524 ulong queued_dear; 525 ulong queued_esr; 526 spinlock_t wdt_lock; 527 struct timer_list wdt_timer; 528 u32 tlbcfg[4]; 529 u32 tlbps[4]; 530 u32 mmucfg; 531 u32 eptcfg; 532 u32 epr; 533 u32 crit_save; 534 struct kvmppc_booke_debug_reg dbg_reg; 535 #endif 536 gpa_t paddr_accessed; 537 gva_t vaddr_accessed; 538 539 u8 io_gpr; /* GPR used as IO source/target */ 540 u8 mmio_is_bigendian; 541 u8 mmio_sign_extend; 542 u8 dcr_needed; 543 u8 dcr_is_write; 544 u8 osi_needed; 545 u8 osi_enabled; 546 u8 papr_enabled; 547 u8 watchdog_enabled; 548 u8 sane; 549 u8 cpu_type; 550 u8 hcall_needed; 551 u8 epr_flags; /* KVMPPC_EPR_xxx */ 552 u8 epr_needed; 553 554 u32 cpr0_cfgaddr; /* holds the last set cpr0_cfgaddr */ 555 556 struct hrtimer dec_timer; 557 struct tasklet_struct tasklet; 558 u64 dec_jiffies; 559 u64 dec_expires; 560 unsigned long pending_exceptions; 561 u8 ceded; 562 u8 prodded; 563 u32 last_inst; 564 565 wait_queue_head_t *wqp; 566 struct kvmppc_vcore *vcore; 567 int ret; 568 int trap; 569 int state; 570 int ptid; 571 bool timer_running; 572 wait_queue_head_t cpu_run; 573 574 struct kvm_vcpu_arch_shared *shared; 575 unsigned long magic_page_pa; /* phys addr to map the magic page to */ 576 unsigned long magic_page_ea; /* effect. addr to map the magic page to */ 577 578 int irq_type; /* one of KVM_IRQ_* */ 579 int irq_cpu_id; 580 struct openpic *mpic; /* KVM_IRQ_MPIC */ 581 #ifdef CONFIG_KVM_XICS 582 struct kvmppc_icp *icp; /* XICS presentation controller */ 583 #endif 584 585 #ifdef CONFIG_KVM_BOOK3S_64_HV 586 struct kvm_vcpu_arch_shared shregs; 587 588 unsigned long pgfault_addr; 589 long pgfault_index; 590 unsigned long pgfault_hpte[2]; 591 592 struct list_head run_list; 593 struct task_struct *run_task; 594 struct kvm_run *kvm_run; 595 pgd_t *pgdir; 596 597 spinlock_t vpa_update_lock; 598 struct kvmppc_vpa vpa; 599 struct kvmppc_vpa dtl; 600 struct dtl_entry *dtl_ptr; 601 unsigned long dtl_index; 602 u64 stolen_logged; 603 struct kvmppc_vpa slb_shadow; 604 605 spinlock_t tbacct_lock; 606 u64 busy_stolen; 607 u64 busy_preempt; 608 #endif 609 }; 610 611 /* Values for vcpu->arch.state */ 612 #define KVMPPC_VCPU_NOTREADY 0 613 #define KVMPPC_VCPU_RUNNABLE 1 614 #define KVMPPC_VCPU_BUSY_IN_HOST 2 615 616 /* Values for vcpu->arch.io_gpr */ 617 #define KVM_MMIO_REG_MASK 0x001f 618 #define KVM_MMIO_REG_EXT_MASK 0xffe0 619 #define KVM_MMIO_REG_GPR 0x0000 620 #define KVM_MMIO_REG_FPR 0x0020 621 #define KVM_MMIO_REG_QPR 0x0040 622 #define KVM_MMIO_REG_FQPR 0x0060 623 624 #define __KVM_HAVE_ARCH_WQP 625 #define __KVM_HAVE_CREATE_DEVICE 626 627 #endif /* __POWERPC_KVM_HOST_H__ */ 628