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 #ifdef CONFIG_KVM_BOOK3S_64_HV 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->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 kvm->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 unsigned long *rmap; 226 }; 227 228 struct kvm_arch { 229 unsigned int lpid; 230 #ifdef CONFIG_KVM_BOOK3S_64_HV 231 unsigned long hpt_virt; 232 struct revmap_entry *revmap; 233 unsigned int host_lpid; 234 unsigned long host_lpcr; 235 unsigned long sdr1; 236 unsigned long host_sdr1; 237 int tlbie_lock; 238 unsigned long lpcr; 239 unsigned long rmor; 240 struct kvmppc_linear_info *rma; 241 unsigned long vrma_slb_v; 242 int rma_setup_done; 243 int using_mmu_notifiers; 244 u32 hpt_order; 245 atomic_t vcpus_running; 246 unsigned long hpt_npte; 247 unsigned long hpt_mask; 248 spinlock_t slot_phys_lock; 249 unsigned long *slot_phys[KVM_MEM_SLOTS_NUM]; 250 int slot_npages[KVM_MEM_SLOTS_NUM]; 251 unsigned short last_vcpu[NR_CPUS]; 252 struct kvmppc_vcore *vcores[KVM_MAX_VCORES]; 253 struct kvmppc_linear_info *hpt_li; 254 #endif /* CONFIG_KVM_BOOK3S_64_HV */ 255 #ifdef CONFIG_PPC_BOOK3S_64 256 struct list_head spapr_tce_tables; 257 #endif 258 }; 259 260 /* 261 * Struct for a virtual core. 262 * Note: entry_exit_count combines an entry count in the bottom 8 bits 263 * and an exit count in the next 8 bits. This is so that we can 264 * atomically increment the entry count iff the exit count is 0 265 * without taking the lock. 266 */ 267 struct kvmppc_vcore { 268 int n_runnable; 269 int n_busy; 270 int num_threads; 271 int entry_exit_count; 272 int n_woken; 273 int nap_count; 274 int napping_threads; 275 u16 pcpu; 276 u8 vcore_state; 277 u8 in_guest; 278 struct list_head runnable_threads; 279 spinlock_t lock; 280 wait_queue_head_t wq; 281 u64 stolen_tb; 282 u64 preempt_tb; 283 struct kvm_vcpu *runner; 284 }; 285 286 #define VCORE_ENTRY_COUNT(vc) ((vc)->entry_exit_count & 0xff) 287 #define VCORE_EXIT_COUNT(vc) ((vc)->entry_exit_count >> 8) 288 289 /* Values for vcore_state */ 290 #define VCORE_INACTIVE 0 291 #define VCORE_RUNNING 1 292 #define VCORE_EXITING 2 293 #define VCORE_SLEEPING 3 294 295 /* 296 * Struct used to manage memory for a virtual processor area 297 * registered by a PAPR guest. There are three types of area 298 * that a guest can register. 299 */ 300 struct kvmppc_vpa { 301 void *pinned_addr; /* Address in kernel linear mapping */ 302 void *pinned_end; /* End of region */ 303 unsigned long next_gpa; /* Guest phys addr for update */ 304 unsigned long len; /* Number of bytes required */ 305 u8 update_pending; /* 1 => update pinned_addr from next_gpa */ 306 }; 307 308 struct kvmppc_pte { 309 ulong eaddr; 310 u64 vpage; 311 ulong raddr; 312 bool may_read : 1; 313 bool may_write : 1; 314 bool may_execute : 1; 315 }; 316 317 struct kvmppc_mmu { 318 /* book3s_64 only */ 319 void (*slbmte)(struct kvm_vcpu *vcpu, u64 rb, u64 rs); 320 u64 (*slbmfee)(struct kvm_vcpu *vcpu, u64 slb_nr); 321 u64 (*slbmfev)(struct kvm_vcpu *vcpu, u64 slb_nr); 322 void (*slbie)(struct kvm_vcpu *vcpu, u64 slb_nr); 323 void (*slbia)(struct kvm_vcpu *vcpu); 324 /* book3s */ 325 void (*mtsrin)(struct kvm_vcpu *vcpu, u32 srnum, ulong value); 326 u32 (*mfsrin)(struct kvm_vcpu *vcpu, u32 srnum); 327 int (*xlate)(struct kvm_vcpu *vcpu, gva_t eaddr, struct kvmppc_pte *pte, bool data); 328 void (*reset_msr)(struct kvm_vcpu *vcpu); 329 void (*tlbie)(struct kvm_vcpu *vcpu, ulong addr, bool large); 330 int (*esid_to_vsid)(struct kvm_vcpu *vcpu, ulong esid, u64 *vsid); 331 u64 (*ea_to_vp)(struct kvm_vcpu *vcpu, gva_t eaddr, bool data); 332 bool (*is_dcbz32)(struct kvm_vcpu *vcpu); 333 }; 334 335 struct kvmppc_slb { 336 u64 esid; 337 u64 vsid; 338 u64 orige; 339 u64 origv; 340 bool valid : 1; 341 bool Ks : 1; 342 bool Kp : 1; 343 bool nx : 1; 344 bool large : 1; /* PTEs are 16MB */ 345 bool tb : 1; /* 1TB segment */ 346 bool class : 1; 347 }; 348 349 struct kvm_vcpu_arch { 350 ulong host_stack; 351 u32 host_pid; 352 #ifdef CONFIG_PPC_BOOK3S 353 struct kvmppc_slb slb[64]; 354 int slb_max; /* 1 + index of last valid entry in slb[] */ 355 int slb_nr; /* total number of entries in SLB */ 356 struct kvmppc_mmu mmu; 357 #endif 358 359 ulong gpr[32]; 360 361 u64 fpr[32]; 362 u64 fpscr; 363 364 #ifdef CONFIG_SPE 365 ulong evr[32]; 366 ulong spefscr; 367 ulong host_spefscr; 368 u64 acc; 369 #endif 370 #ifdef CONFIG_ALTIVEC 371 vector128 vr[32]; 372 vector128 vscr; 373 #endif 374 375 #ifdef CONFIG_VSX 376 u64 vsr[64]; 377 #endif 378 379 #ifdef CONFIG_KVM_BOOKE_HV 380 u32 host_mas4; 381 u32 host_mas6; 382 u32 shadow_epcr; 383 u32 epcr; 384 u32 shadow_msrp; 385 u32 eplc; 386 u32 epsc; 387 u32 oldpir; 388 #endif 389 390 #ifdef CONFIG_PPC_BOOK3S 391 /* For Gekko paired singles */ 392 u32 qpr[32]; 393 #endif 394 395 ulong pc; 396 ulong ctr; 397 ulong lr; 398 399 ulong xer; 400 u32 cr; 401 402 #ifdef CONFIG_PPC_BOOK3S 403 ulong hflags; 404 ulong guest_owned_ext; 405 ulong purr; 406 ulong spurr; 407 ulong dscr; 408 ulong amr; 409 ulong uamor; 410 u32 ctrl; 411 ulong dabr; 412 #endif 413 u32 vrsave; /* also USPRG0 */ 414 u32 mmucr; 415 /* shadow_msr is unused for BookE HV */ 416 ulong shadow_msr; 417 ulong csrr0; 418 ulong csrr1; 419 ulong dsrr0; 420 ulong dsrr1; 421 ulong mcsrr0; 422 ulong mcsrr1; 423 ulong mcsr; 424 u32 dec; 425 #ifdef CONFIG_BOOKE 426 u32 decar; 427 #endif 428 u32 tbl; 429 u32 tbu; 430 u32 tcr; 431 ulong tsr; /* we need to perform set/clr_bits() which requires ulong */ 432 u32 ivor[64]; 433 ulong ivpr; 434 u32 pvr; 435 436 u32 shadow_pid; 437 u32 shadow_pid1; 438 u32 pid; 439 u32 swap_pid; 440 441 u32 ccr0; 442 u32 ccr1; 443 u32 dbcr0; 444 u32 dbcr1; 445 u32 dbsr; 446 447 u64 mmcr[3]; 448 u32 pmc[8]; 449 450 #ifdef CONFIG_KVM_EXIT_TIMING 451 struct mutex exit_timing_lock; 452 struct kvmppc_exit_timing timing_exit; 453 struct kvmppc_exit_timing timing_last_enter; 454 u32 last_exit_type; 455 u32 timing_count_type[__NUMBER_OF_KVM_EXIT_TYPES]; 456 u64 timing_sum_duration[__NUMBER_OF_KVM_EXIT_TYPES]; 457 u64 timing_sum_quad_duration[__NUMBER_OF_KVM_EXIT_TYPES]; 458 u64 timing_min_duration[__NUMBER_OF_KVM_EXIT_TYPES]; 459 u64 timing_max_duration[__NUMBER_OF_KVM_EXIT_TYPES]; 460 u64 timing_last_exit; 461 struct dentry *debugfs_exit_timing; 462 #endif 463 464 #ifdef CONFIG_PPC_BOOK3S 465 ulong fault_dar; 466 u32 fault_dsisr; 467 #endif 468 469 #ifdef CONFIG_BOOKE 470 ulong fault_dear; 471 ulong fault_esr; 472 ulong queued_dear; 473 ulong queued_esr; 474 u32 tlbcfg[4]; 475 u32 mmucfg; 476 u32 epr; 477 #endif 478 gpa_t paddr_accessed; 479 gva_t vaddr_accessed; 480 481 u8 io_gpr; /* GPR used as IO source/target */ 482 u8 mmio_is_bigendian; 483 u8 mmio_sign_extend; 484 u8 dcr_needed; 485 u8 dcr_is_write; 486 u8 osi_needed; 487 u8 osi_enabled; 488 u8 papr_enabled; 489 u8 sane; 490 u8 cpu_type; 491 u8 hcall_needed; 492 493 u32 cpr0_cfgaddr; /* holds the last set cpr0_cfgaddr */ 494 495 struct hrtimer dec_timer; 496 struct tasklet_struct tasklet; 497 u64 dec_jiffies; 498 u64 dec_expires; 499 unsigned long pending_exceptions; 500 u16 last_cpu; 501 u8 ceded; 502 u8 prodded; 503 u32 last_inst; 504 505 wait_queue_head_t *wqp; 506 struct kvmppc_vcore *vcore; 507 int ret; 508 int trap; 509 int state; 510 int ptid; 511 bool timer_running; 512 wait_queue_head_t cpu_run; 513 514 struct kvm_vcpu_arch_shared *shared; 515 unsigned long magic_page_pa; /* phys addr to map the magic page to */ 516 unsigned long magic_page_ea; /* effect. addr to map the magic page to */ 517 518 #ifdef CONFIG_KVM_BOOK3S_64_HV 519 struct kvm_vcpu_arch_shared shregs; 520 521 unsigned long pgfault_addr; 522 long pgfault_index; 523 unsigned long pgfault_hpte[2]; 524 525 struct list_head run_list; 526 struct task_struct *run_task; 527 struct kvm_run *kvm_run; 528 pgd_t *pgdir; 529 530 spinlock_t vpa_update_lock; 531 struct kvmppc_vpa vpa; 532 struct kvmppc_vpa dtl; 533 struct dtl_entry *dtl_ptr; 534 unsigned long dtl_index; 535 u64 stolen_logged; 536 struct kvmppc_vpa slb_shadow; 537 #endif 538 }; 539 540 /* Values for vcpu->arch.state */ 541 #define KVMPPC_VCPU_STOPPED 0 542 #define KVMPPC_VCPU_BUSY_IN_HOST 1 543 #define KVMPPC_VCPU_RUNNABLE 2 544 545 /* Values for vcpu->arch.io_gpr */ 546 #define KVM_MMIO_REG_MASK 0x001f 547 #define KVM_MMIO_REG_EXT_MASK 0xffe0 548 #define KVM_MMIO_REG_GPR 0x0000 549 #define KVM_MMIO_REG_FPR 0x0020 550 #define KVM_MMIO_REG_QPR 0x0040 551 #define KVM_MMIO_REG_FQPR 0x0060 552 553 #define __KVM_HAVE_ARCH_WQP 554 555 #endif /* __POWERPC_KVM_HOST_H__ */ 556