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_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->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 kvm->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 }; 224 225 struct kvm_arch { 226 unsigned int lpid; 227 #ifdef CONFIG_KVM_BOOK3S_64_HV 228 unsigned long hpt_virt; 229 struct revmap_entry *revmap; 230 unsigned int host_lpid; 231 unsigned long host_lpcr; 232 unsigned long sdr1; 233 unsigned long host_sdr1; 234 int tlbie_lock; 235 unsigned long lpcr; 236 unsigned long rmor; 237 struct kvmppc_linear_info *rma; 238 unsigned long vrma_slb_v; 239 int rma_setup_done; 240 int using_mmu_notifiers; 241 u32 hpt_order; 242 atomic_t vcpus_running; 243 unsigned long hpt_npte; 244 unsigned long hpt_mask; 245 spinlock_t slot_phys_lock; 246 unsigned long *slot_phys[KVM_MEM_SLOTS_NUM]; 247 int slot_npages[KVM_MEM_SLOTS_NUM]; 248 unsigned short last_vcpu[NR_CPUS]; 249 struct kvmppc_vcore *vcores[KVM_MAX_VCORES]; 250 struct kvmppc_linear_info *hpt_li; 251 #endif /* CONFIG_KVM_BOOK3S_64_HV */ 252 #ifdef CONFIG_PPC_BOOK3S_64 253 struct list_head spapr_tce_tables; 254 #endif 255 }; 256 257 /* 258 * Struct for a virtual core. 259 * Note: entry_exit_count combines an entry count in the bottom 8 bits 260 * and an exit count in the next 8 bits. This is so that we can 261 * atomically increment the entry count iff the exit count is 0 262 * without taking the lock. 263 */ 264 struct kvmppc_vcore { 265 int n_runnable; 266 int n_busy; 267 int num_threads; 268 int entry_exit_count; 269 int n_woken; 270 int nap_count; 271 int napping_threads; 272 u16 pcpu; 273 u8 vcore_state; 274 u8 in_guest; 275 struct list_head runnable_threads; 276 spinlock_t lock; 277 wait_queue_head_t wq; 278 u64 stolen_tb; 279 u64 preempt_tb; 280 struct kvm_vcpu *runner; 281 }; 282 283 #define VCORE_ENTRY_COUNT(vc) ((vc)->entry_exit_count & 0xff) 284 #define VCORE_EXIT_COUNT(vc) ((vc)->entry_exit_count >> 8) 285 286 /* Values for vcore_state */ 287 #define VCORE_INACTIVE 0 288 #define VCORE_RUNNING 1 289 #define VCORE_EXITING 2 290 #define VCORE_SLEEPING 3 291 292 /* 293 * Struct used to manage memory for a virtual processor area 294 * registered by a PAPR guest. There are three types of area 295 * that a guest can register. 296 */ 297 struct kvmppc_vpa { 298 void *pinned_addr; /* Address in kernel linear mapping */ 299 void *pinned_end; /* End of region */ 300 unsigned long next_gpa; /* Guest phys addr for update */ 301 unsigned long len; /* Number of bytes required */ 302 u8 update_pending; /* 1 => update pinned_addr from next_gpa */ 303 }; 304 305 struct kvmppc_pte { 306 ulong eaddr; 307 u64 vpage; 308 ulong raddr; 309 bool may_read : 1; 310 bool may_write : 1; 311 bool may_execute : 1; 312 }; 313 314 struct kvmppc_mmu { 315 /* book3s_64 only */ 316 void (*slbmte)(struct kvm_vcpu *vcpu, u64 rb, u64 rs); 317 u64 (*slbmfee)(struct kvm_vcpu *vcpu, u64 slb_nr); 318 u64 (*slbmfev)(struct kvm_vcpu *vcpu, u64 slb_nr); 319 void (*slbie)(struct kvm_vcpu *vcpu, u64 slb_nr); 320 void (*slbia)(struct kvm_vcpu *vcpu); 321 /* book3s */ 322 void (*mtsrin)(struct kvm_vcpu *vcpu, u32 srnum, ulong value); 323 u32 (*mfsrin)(struct kvm_vcpu *vcpu, u32 srnum); 324 int (*xlate)(struct kvm_vcpu *vcpu, gva_t eaddr, struct kvmppc_pte *pte, bool data); 325 void (*reset_msr)(struct kvm_vcpu *vcpu); 326 void (*tlbie)(struct kvm_vcpu *vcpu, ulong addr, bool large); 327 int (*esid_to_vsid)(struct kvm_vcpu *vcpu, ulong esid, u64 *vsid); 328 u64 (*ea_to_vp)(struct kvm_vcpu *vcpu, gva_t eaddr, bool data); 329 bool (*is_dcbz32)(struct kvm_vcpu *vcpu); 330 }; 331 332 struct kvmppc_slb { 333 u64 esid; 334 u64 vsid; 335 u64 orige; 336 u64 origv; 337 bool valid : 1; 338 bool Ks : 1; 339 bool Kp : 1; 340 bool nx : 1; 341 bool large : 1; /* PTEs are 16MB */ 342 bool tb : 1; /* 1TB segment */ 343 bool class : 1; 344 }; 345 346 struct kvm_vcpu_arch { 347 ulong host_stack; 348 u32 host_pid; 349 #ifdef CONFIG_PPC_BOOK3S 350 struct kvmppc_slb slb[64]; 351 int slb_max; /* 1 + index of last valid entry in slb[] */ 352 int slb_nr; /* total number of entries in SLB */ 353 struct kvmppc_mmu mmu; 354 #endif 355 356 ulong gpr[32]; 357 358 u64 fpr[32]; 359 u64 fpscr; 360 361 #ifdef CONFIG_SPE 362 ulong evr[32]; 363 ulong spefscr; 364 ulong host_spefscr; 365 u64 acc; 366 #endif 367 #ifdef CONFIG_ALTIVEC 368 vector128 vr[32]; 369 vector128 vscr; 370 #endif 371 372 #ifdef CONFIG_VSX 373 u64 vsr[64]; 374 #endif 375 376 #ifdef CONFIG_KVM_BOOKE_HV 377 u32 host_mas4; 378 u32 host_mas6; 379 u32 shadow_epcr; 380 u32 epcr; 381 u32 shadow_msrp; 382 u32 eplc; 383 u32 epsc; 384 u32 oldpir; 385 #endif 386 387 #ifdef CONFIG_PPC_BOOK3S 388 /* For Gekko paired singles */ 389 u32 qpr[32]; 390 #endif 391 392 ulong pc; 393 ulong ctr; 394 ulong lr; 395 396 ulong xer; 397 u32 cr; 398 399 #ifdef CONFIG_PPC_BOOK3S 400 ulong hflags; 401 ulong guest_owned_ext; 402 ulong purr; 403 ulong spurr; 404 ulong dscr; 405 ulong amr; 406 ulong uamor; 407 u32 ctrl; 408 ulong dabr; 409 #endif 410 u32 vrsave; /* also USPRG0 */ 411 u32 mmucr; 412 /* shadow_msr is unused for BookE HV */ 413 ulong shadow_msr; 414 ulong csrr0; 415 ulong csrr1; 416 ulong dsrr0; 417 ulong dsrr1; 418 ulong mcsrr0; 419 ulong mcsrr1; 420 ulong mcsr; 421 u32 dec; 422 #ifdef CONFIG_BOOKE 423 u32 decar; 424 #endif 425 u32 tbl; 426 u32 tbu; 427 u32 tcr; 428 ulong tsr; /* we need to perform set/clr_bits() which requires ulong */ 429 u32 ivor[64]; 430 ulong ivpr; 431 u32 pvr; 432 433 u32 shadow_pid; 434 u32 shadow_pid1; 435 u32 pid; 436 u32 swap_pid; 437 438 u32 ccr0; 439 u32 ccr1; 440 u32 dbcr0; 441 u32 dbcr1; 442 u32 dbsr; 443 444 u64 mmcr[3]; 445 u32 pmc[8]; 446 447 #ifdef CONFIG_KVM_EXIT_TIMING 448 struct mutex exit_timing_lock; 449 struct kvmppc_exit_timing timing_exit; 450 struct kvmppc_exit_timing timing_last_enter; 451 u32 last_exit_type; 452 u32 timing_count_type[__NUMBER_OF_KVM_EXIT_TYPES]; 453 u64 timing_sum_duration[__NUMBER_OF_KVM_EXIT_TYPES]; 454 u64 timing_sum_quad_duration[__NUMBER_OF_KVM_EXIT_TYPES]; 455 u64 timing_min_duration[__NUMBER_OF_KVM_EXIT_TYPES]; 456 u64 timing_max_duration[__NUMBER_OF_KVM_EXIT_TYPES]; 457 u64 timing_last_exit; 458 struct dentry *debugfs_exit_timing; 459 #endif 460 461 #ifdef CONFIG_PPC_BOOK3S 462 ulong fault_dar; 463 u32 fault_dsisr; 464 #endif 465 466 #ifdef CONFIG_BOOKE 467 ulong fault_dear; 468 ulong fault_esr; 469 ulong queued_dear; 470 ulong queued_esr; 471 u32 tlbcfg[4]; 472 u32 mmucfg; 473 u32 epr; 474 #endif 475 gpa_t paddr_accessed; 476 gva_t vaddr_accessed; 477 478 u8 io_gpr; /* GPR used as IO source/target */ 479 u8 mmio_is_bigendian; 480 u8 mmio_sign_extend; 481 u8 dcr_needed; 482 u8 dcr_is_write; 483 u8 osi_needed; 484 u8 osi_enabled; 485 u8 papr_enabled; 486 u8 sane; 487 u8 cpu_type; 488 u8 hcall_needed; 489 490 u32 cpr0_cfgaddr; /* holds the last set cpr0_cfgaddr */ 491 492 struct hrtimer dec_timer; 493 struct tasklet_struct tasklet; 494 u64 dec_jiffies; 495 u64 dec_expires; 496 unsigned long pending_exceptions; 497 u16 last_cpu; 498 u8 ceded; 499 u8 prodded; 500 u32 last_inst; 501 502 wait_queue_head_t *wqp; 503 struct kvmppc_vcore *vcore; 504 int ret; 505 int trap; 506 int state; 507 int ptid; 508 bool timer_running; 509 wait_queue_head_t cpu_run; 510 511 struct kvm_vcpu_arch_shared *shared; 512 unsigned long magic_page_pa; /* phys addr to map the magic page to */ 513 unsigned long magic_page_ea; /* effect. addr to map the magic page to */ 514 515 #ifdef CONFIG_KVM_BOOK3S_64_HV 516 struct kvm_vcpu_arch_shared shregs; 517 518 unsigned long pgfault_addr; 519 long pgfault_index; 520 unsigned long pgfault_hpte[2]; 521 522 struct list_head run_list; 523 struct task_struct *run_task; 524 struct kvm_run *kvm_run; 525 pgd_t *pgdir; 526 527 spinlock_t vpa_update_lock; 528 struct kvmppc_vpa vpa; 529 struct kvmppc_vpa dtl; 530 struct dtl_entry *dtl_ptr; 531 unsigned long dtl_index; 532 u64 stolen_logged; 533 struct kvmppc_vpa slb_shadow; 534 #endif 535 }; 536 537 /* Values for vcpu->arch.state */ 538 #define KVMPPC_VCPU_STOPPED 0 539 #define KVMPPC_VCPU_BUSY_IN_HOST 1 540 #define KVMPPC_VCPU_RUNNABLE 2 541 542 /* Values for vcpu->arch.io_gpr */ 543 #define KVM_MMIO_REG_MASK 0x001f 544 #define KVM_MMIO_REG_EXT_MASK 0xffe0 545 #define KVM_MMIO_REG_GPR 0x0000 546 #define KVM_MMIO_REG_FPR 0x0020 547 #define KVM_MMIO_REG_QPR 0x0040 548 #define KVM_MMIO_REG_FQPR 0x0060 549 550 #define __KVM_HAVE_ARCH_WQP 551 552 #endif /* __POWERPC_KVM_HOST_H__ */ 553