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 37 #define KVM_MAX_VCPUS NR_CPUS 38 #define KVM_MAX_VCORES NR_CPUS 39 #define KVM_MEMORY_SLOTS 32 40 /* memory slots that does not exposed to userspace */ 41 #define KVM_PRIVATE_MEM_SLOTS 4 42 #define KVM_MEM_SLOTS_NUM (KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS) 43 44 #ifdef CONFIG_KVM_MMIO 45 #define KVM_COALESCED_MMIO_PAGE_OFFSET 1 46 #endif 47 48 #ifdef CONFIG_KVM_BOOK3S_64_HV 49 #include <linux/mmu_notifier.h> 50 51 #define KVM_ARCH_WANT_MMU_NOTIFIER 52 53 struct kvm; 54 extern int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); 55 extern int kvm_age_hva(struct kvm *kvm, unsigned long hva); 56 extern int kvm_test_age_hva(struct kvm *kvm, unsigned long hva); 57 extern void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte); 58 59 #endif 60 61 /* We don't currently support large pages. */ 62 #define KVM_HPAGE_GFN_SHIFT(x) 0 63 #define KVM_NR_PAGE_SIZES 1 64 #define KVM_PAGES_PER_HPAGE(x) (1UL<<31) 65 66 #define HPTEG_CACHE_NUM (1 << 15) 67 #define HPTEG_HASH_BITS_PTE 13 68 #define HPTEG_HASH_BITS_PTE_LONG 12 69 #define HPTEG_HASH_BITS_VPTE 13 70 #define HPTEG_HASH_BITS_VPTE_LONG 5 71 #define HPTEG_HASH_NUM_PTE (1 << HPTEG_HASH_BITS_PTE) 72 #define HPTEG_HASH_NUM_PTE_LONG (1 << HPTEG_HASH_BITS_PTE_LONG) 73 #define HPTEG_HASH_NUM_VPTE (1 << HPTEG_HASH_BITS_VPTE) 74 #define HPTEG_HASH_NUM_VPTE_LONG (1 << HPTEG_HASH_BITS_VPTE_LONG) 75 76 /* Physical Address Mask - allowed range of real mode RAM access */ 77 #define KVM_PAM 0x0fffffffffffffffULL 78 79 struct kvm; 80 struct kvm_run; 81 struct kvm_vcpu; 82 83 struct lppaca; 84 struct slb_shadow; 85 struct dtl_entry; 86 87 struct kvm_vm_stat { 88 u32 remote_tlb_flush; 89 }; 90 91 struct kvm_vcpu_stat { 92 u32 sum_exits; 93 u32 mmio_exits; 94 u32 dcr_exits; 95 u32 signal_exits; 96 u32 light_exits; 97 /* Account for special types of light exits: */ 98 u32 itlb_real_miss_exits; 99 u32 itlb_virt_miss_exits; 100 u32 dtlb_real_miss_exits; 101 u32 dtlb_virt_miss_exits; 102 u32 syscall_exits; 103 u32 isi_exits; 104 u32 dsi_exits; 105 u32 emulated_inst_exits; 106 u32 dec_exits; 107 u32 ext_intr_exits; 108 u32 halt_wakeup; 109 u32 dbell_exits; 110 u32 gdbell_exits; 111 #ifdef CONFIG_PPC_BOOK3S 112 u32 pf_storage; 113 u32 pf_instruc; 114 u32 sp_storage; 115 u32 sp_instruc; 116 u32 queue_intr; 117 u32 ld; 118 u32 ld_slow; 119 u32 st; 120 u32 st_slow; 121 #endif 122 }; 123 124 enum kvm_exit_types { 125 MMIO_EXITS, 126 DCR_EXITS, 127 SIGNAL_EXITS, 128 ITLB_REAL_MISS_EXITS, 129 ITLB_VIRT_MISS_EXITS, 130 DTLB_REAL_MISS_EXITS, 131 DTLB_VIRT_MISS_EXITS, 132 SYSCALL_EXITS, 133 ISI_EXITS, 134 DSI_EXITS, 135 EMULATED_INST_EXITS, 136 EMULATED_MTMSRWE_EXITS, 137 EMULATED_WRTEE_EXITS, 138 EMULATED_MTSPR_EXITS, 139 EMULATED_MFSPR_EXITS, 140 EMULATED_MTMSR_EXITS, 141 EMULATED_MFMSR_EXITS, 142 EMULATED_TLBSX_EXITS, 143 EMULATED_TLBWE_EXITS, 144 EMULATED_RFI_EXITS, 145 EMULATED_RFCI_EXITS, 146 DEC_EXITS, 147 EXT_INTR_EXITS, 148 HALT_WAKEUP, 149 USR_PR_INST, 150 FP_UNAVAIL, 151 DEBUG_EXITS, 152 TIMEINGUEST, 153 DBELL_EXITS, 154 GDBELL_EXITS, 155 __NUMBER_OF_KVM_EXIT_TYPES 156 }; 157 158 /* allow access to big endian 32bit upper/lower parts and 64bit var */ 159 struct kvmppc_exit_timing { 160 union { 161 u64 tv64; 162 struct { 163 u32 tbu, tbl; 164 } tv32; 165 }; 166 }; 167 168 struct kvmppc_pginfo { 169 unsigned long pfn; 170 atomic_t refcnt; 171 }; 172 173 struct kvmppc_spapr_tce_table { 174 struct list_head list; 175 struct kvm *kvm; 176 u64 liobn; 177 u32 window_size; 178 struct page *pages[0]; 179 }; 180 181 struct kvmppc_linear_info { 182 void *base_virt; 183 unsigned long base_pfn; 184 unsigned long npages; 185 struct list_head list; 186 atomic_t use_count; 187 int type; 188 }; 189 190 /* 191 * The reverse mapping array has one entry for each HPTE, 192 * which stores the guest's view of the second word of the HPTE 193 * (including the guest physical address of the mapping), 194 * plus forward and backward pointers in a doubly-linked ring 195 * of HPTEs that map the same host page. The pointers in this 196 * ring are 32-bit HPTE indexes, to save space. 197 */ 198 struct revmap_entry { 199 unsigned long guest_rpte; 200 unsigned int forw, back; 201 }; 202 203 /* 204 * We use the top bit of each memslot->rmap entry as a lock bit, 205 * and bit 32 as a present flag. The bottom 32 bits are the 206 * index in the guest HPT of a HPTE that points to the page. 207 */ 208 #define KVMPPC_RMAP_LOCK_BIT 63 209 #define KVMPPC_RMAP_RC_SHIFT 32 210 #define KVMPPC_RMAP_REFERENCED (HPTE_R_R << KVMPPC_RMAP_RC_SHIFT) 211 #define KVMPPC_RMAP_CHANGED (HPTE_R_C << KVMPPC_RMAP_RC_SHIFT) 212 #define KVMPPC_RMAP_PRESENT 0x100000000ul 213 #define KVMPPC_RMAP_INDEX 0xfffffffful 214 215 /* Low-order bits in kvm->arch.slot_phys[][] */ 216 #define KVMPPC_PAGE_ORDER_MASK 0x1f 217 #define KVMPPC_PAGE_NO_CACHE HPTE_R_I /* 0x20 */ 218 #define KVMPPC_PAGE_WRITETHRU HPTE_R_W /* 0x40 */ 219 #define KVMPPC_GOT_PAGE 0x80 220 221 struct kvm_arch_memory_slot { 222 }; 223 224 struct kvm_arch { 225 unsigned int lpid; 226 #ifdef CONFIG_KVM_BOOK3S_64_HV 227 unsigned long hpt_virt; 228 struct revmap_entry *revmap; 229 unsigned int host_lpid; 230 unsigned long host_lpcr; 231 unsigned long sdr1; 232 unsigned long host_sdr1; 233 int tlbie_lock; 234 unsigned long lpcr; 235 unsigned long rmor; 236 struct kvmppc_linear_info *rma; 237 unsigned long vrma_slb_v; 238 int rma_setup_done; 239 int using_mmu_notifiers; 240 u32 hpt_order; 241 atomic_t vcpus_running; 242 unsigned long hpt_npte; 243 unsigned long hpt_mask; 244 spinlock_t slot_phys_lock; 245 unsigned long *slot_phys[KVM_MEM_SLOTS_NUM]; 246 int slot_npages[KVM_MEM_SLOTS_NUM]; 247 unsigned short last_vcpu[NR_CPUS]; 248 struct kvmppc_vcore *vcores[KVM_MAX_VCORES]; 249 struct kvmppc_linear_info *hpt_li; 250 #endif /* CONFIG_KVM_BOOK3S_64_HV */ 251 #ifdef CONFIG_PPC_BOOK3S_64 252 struct list_head spapr_tce_tables; 253 #endif 254 }; 255 256 /* 257 * Struct for a virtual core. 258 * Note: entry_exit_count combines an entry count in the bottom 8 bits 259 * and an exit count in the next 8 bits. This is so that we can 260 * atomically increment the entry count iff the exit count is 0 261 * without taking the lock. 262 */ 263 struct kvmppc_vcore { 264 int n_runnable; 265 int n_busy; 266 int num_threads; 267 int entry_exit_count; 268 int n_woken; 269 int nap_count; 270 int napping_threads; 271 u16 pcpu; 272 u8 vcore_state; 273 u8 in_guest; 274 struct list_head runnable_threads; 275 spinlock_t lock; 276 wait_queue_head_t wq; 277 u64 stolen_tb; 278 u64 preempt_tb; 279 struct kvm_vcpu *runner; 280 }; 281 282 #define VCORE_ENTRY_COUNT(vc) ((vc)->entry_exit_count & 0xff) 283 #define VCORE_EXIT_COUNT(vc) ((vc)->entry_exit_count >> 8) 284 285 /* Values for vcore_state */ 286 #define VCORE_INACTIVE 0 287 #define VCORE_RUNNING 1 288 #define VCORE_EXITING 2 289 #define VCORE_SLEEPING 3 290 291 /* 292 * Struct used to manage memory for a virtual processor area 293 * registered by a PAPR guest. There are three types of area 294 * that a guest can register. 295 */ 296 struct kvmppc_vpa { 297 void *pinned_addr; /* Address in kernel linear mapping */ 298 void *pinned_end; /* End of region */ 299 unsigned long next_gpa; /* Guest phys addr for update */ 300 unsigned long len; /* Number of bytes required */ 301 u8 update_pending; /* 1 => update pinned_addr from next_gpa */ 302 }; 303 304 struct kvmppc_pte { 305 ulong eaddr; 306 u64 vpage; 307 ulong raddr; 308 bool may_read : 1; 309 bool may_write : 1; 310 bool may_execute : 1; 311 }; 312 313 struct kvmppc_mmu { 314 /* book3s_64 only */ 315 void (*slbmte)(struct kvm_vcpu *vcpu, u64 rb, u64 rs); 316 u64 (*slbmfee)(struct kvm_vcpu *vcpu, u64 slb_nr); 317 u64 (*slbmfev)(struct kvm_vcpu *vcpu, u64 slb_nr); 318 void (*slbie)(struct kvm_vcpu *vcpu, u64 slb_nr); 319 void (*slbia)(struct kvm_vcpu *vcpu); 320 /* book3s */ 321 void (*mtsrin)(struct kvm_vcpu *vcpu, u32 srnum, ulong value); 322 u32 (*mfsrin)(struct kvm_vcpu *vcpu, u32 srnum); 323 int (*xlate)(struct kvm_vcpu *vcpu, gva_t eaddr, struct kvmppc_pte *pte, bool data); 324 void (*reset_msr)(struct kvm_vcpu *vcpu); 325 void (*tlbie)(struct kvm_vcpu *vcpu, ulong addr, bool large); 326 int (*esid_to_vsid)(struct kvm_vcpu *vcpu, ulong esid, u64 *vsid); 327 u64 (*ea_to_vp)(struct kvm_vcpu *vcpu, gva_t eaddr, bool data); 328 bool (*is_dcbz32)(struct kvm_vcpu *vcpu); 329 }; 330 331 struct kvmppc_slb { 332 u64 esid; 333 u64 vsid; 334 u64 orige; 335 u64 origv; 336 bool valid : 1; 337 bool Ks : 1; 338 bool Kp : 1; 339 bool nx : 1; 340 bool large : 1; /* PTEs are 16MB */ 341 bool tb : 1; /* 1TB segment */ 342 bool class : 1; 343 }; 344 345 struct kvm_vcpu_arch { 346 ulong host_stack; 347 u32 host_pid; 348 #ifdef CONFIG_PPC_BOOK3S 349 struct kvmppc_slb slb[64]; 350 int slb_max; /* 1 + index of last valid entry in slb[] */ 351 int slb_nr; /* total number of entries in SLB */ 352 struct kvmppc_mmu mmu; 353 #endif 354 355 ulong gpr[32]; 356 357 u64 fpr[32]; 358 u64 fpscr; 359 360 #ifdef CONFIG_SPE 361 ulong evr[32]; 362 ulong spefscr; 363 ulong host_spefscr; 364 u64 acc; 365 #endif 366 #ifdef CONFIG_ALTIVEC 367 vector128 vr[32]; 368 vector128 vscr; 369 #endif 370 371 #ifdef CONFIG_VSX 372 u64 vsr[64]; 373 #endif 374 375 #ifdef CONFIG_KVM_BOOKE_HV 376 u32 host_mas4; 377 u32 host_mas6; 378 u32 shadow_epcr; 379 u32 epcr; 380 u32 shadow_msrp; 381 u32 eplc; 382 u32 epsc; 383 u32 oldpir; 384 #endif 385 386 #ifdef CONFIG_PPC_BOOK3S 387 /* For Gekko paired singles */ 388 u32 qpr[32]; 389 #endif 390 391 ulong pc; 392 ulong ctr; 393 ulong lr; 394 395 ulong xer; 396 u32 cr; 397 398 #ifdef CONFIG_PPC_BOOK3S 399 ulong hflags; 400 ulong guest_owned_ext; 401 ulong purr; 402 ulong spurr; 403 ulong dscr; 404 ulong amr; 405 ulong uamor; 406 u32 ctrl; 407 ulong dabr; 408 #endif 409 u32 vrsave; /* also USPRG0 */ 410 u32 mmucr; 411 /* shadow_msr is unused for BookE HV */ 412 ulong shadow_msr; 413 ulong csrr0; 414 ulong csrr1; 415 ulong dsrr0; 416 ulong dsrr1; 417 ulong mcsrr0; 418 ulong mcsrr1; 419 ulong mcsr; 420 u32 dec; 421 #ifdef CONFIG_BOOKE 422 u32 decar; 423 #endif 424 u32 tbl; 425 u32 tbu; 426 u32 tcr; 427 ulong tsr; /* we need to perform set/clr_bits() which requires ulong */ 428 u32 ivor[64]; 429 ulong ivpr; 430 u32 pvr; 431 432 u32 shadow_pid; 433 u32 shadow_pid1; 434 u32 pid; 435 u32 swap_pid; 436 437 u32 ccr0; 438 u32 ccr1; 439 u32 dbcr0; 440 u32 dbcr1; 441 u32 dbsr; 442 443 u64 mmcr[3]; 444 u32 pmc[8]; 445 446 #ifdef CONFIG_KVM_EXIT_TIMING 447 struct mutex exit_timing_lock; 448 struct kvmppc_exit_timing timing_exit; 449 struct kvmppc_exit_timing timing_last_enter; 450 u32 last_exit_type; 451 u32 timing_count_type[__NUMBER_OF_KVM_EXIT_TYPES]; 452 u64 timing_sum_duration[__NUMBER_OF_KVM_EXIT_TYPES]; 453 u64 timing_sum_quad_duration[__NUMBER_OF_KVM_EXIT_TYPES]; 454 u64 timing_min_duration[__NUMBER_OF_KVM_EXIT_TYPES]; 455 u64 timing_max_duration[__NUMBER_OF_KVM_EXIT_TYPES]; 456 u64 timing_last_exit; 457 struct dentry *debugfs_exit_timing; 458 #endif 459 460 #ifdef CONFIG_PPC_BOOK3S 461 ulong fault_dar; 462 u32 fault_dsisr; 463 #endif 464 465 #ifdef CONFIG_BOOKE 466 ulong fault_dear; 467 ulong fault_esr; 468 ulong queued_dear; 469 ulong queued_esr; 470 u32 tlbcfg[4]; 471 u32 mmucfg; 472 u32 epr; 473 #endif 474 gpa_t paddr_accessed; 475 gva_t vaddr_accessed; 476 477 u8 io_gpr; /* GPR used as IO source/target */ 478 u8 mmio_is_bigendian; 479 u8 mmio_sign_extend; 480 u8 dcr_needed; 481 u8 dcr_is_write; 482 u8 osi_needed; 483 u8 osi_enabled; 484 u8 papr_enabled; 485 u8 sane; 486 u8 cpu_type; 487 u8 hcall_needed; 488 489 u32 cpr0_cfgaddr; /* holds the last set cpr0_cfgaddr */ 490 491 struct hrtimer dec_timer; 492 struct tasklet_struct tasklet; 493 u64 dec_jiffies; 494 u64 dec_expires; 495 unsigned long pending_exceptions; 496 u16 last_cpu; 497 u8 ceded; 498 u8 prodded; 499 u32 last_inst; 500 501 wait_queue_head_t *wqp; 502 struct kvmppc_vcore *vcore; 503 int ret; 504 int trap; 505 int state; 506 int ptid; 507 bool timer_running; 508 wait_queue_head_t cpu_run; 509 510 struct kvm_vcpu_arch_shared *shared; 511 unsigned long magic_page_pa; /* phys addr to map the magic page to */ 512 unsigned long magic_page_ea; /* effect. addr to map the magic page to */ 513 514 #ifdef CONFIG_KVM_BOOK3S_64_HV 515 struct kvm_vcpu_arch_shared shregs; 516 517 unsigned long pgfault_addr; 518 long pgfault_index; 519 unsigned long pgfault_hpte[2]; 520 521 struct list_head run_list; 522 struct task_struct *run_task; 523 struct kvm_run *kvm_run; 524 pgd_t *pgdir; 525 526 spinlock_t vpa_update_lock; 527 struct kvmppc_vpa vpa; 528 struct kvmppc_vpa dtl; 529 struct dtl_entry *dtl_ptr; 530 unsigned long dtl_index; 531 u64 stolen_logged; 532 struct kvmppc_vpa slb_shadow; 533 #endif 534 }; 535 536 /* Values for vcpu->arch.state */ 537 #define KVMPPC_VCPU_STOPPED 0 538 #define KVMPPC_VCPU_BUSY_IN_HOST 1 539 #define KVMPPC_VCPU_RUNNABLE 2 540 541 /* Values for vcpu->arch.io_gpr */ 542 #define KVM_MMIO_REG_MASK 0x001f 543 #define KVM_MMIO_REG_EXT_MASK 0xffe0 544 #define KVM_MMIO_REG_GPR 0x0000 545 #define KVM_MMIO_REG_FPR 0x0020 546 #define KVM_MMIO_REG_QPR 0x0040 547 #define KVM_MMIO_REG_FQPR 0x0060 548 549 #define __KVM_HAVE_ARCH_WQP 550 551 #endif /* __POWERPC_KVM_HOST_H__ */ 552