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