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; 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 #ifdef CONFIG_PPC_BOOK3S 110 u32 pf_storage; 111 u32 pf_instruc; 112 u32 sp_storage; 113 u32 sp_instruc; 114 u32 queue_intr; 115 u32 ld; 116 u32 ld_slow; 117 u32 st; 118 u32 st_slow; 119 #endif 120 }; 121 122 enum kvm_exit_types { 123 MMIO_EXITS, 124 DCR_EXITS, 125 SIGNAL_EXITS, 126 ITLB_REAL_MISS_EXITS, 127 ITLB_VIRT_MISS_EXITS, 128 DTLB_REAL_MISS_EXITS, 129 DTLB_VIRT_MISS_EXITS, 130 SYSCALL_EXITS, 131 ISI_EXITS, 132 DSI_EXITS, 133 EMULATED_INST_EXITS, 134 EMULATED_MTMSRWE_EXITS, 135 EMULATED_WRTEE_EXITS, 136 EMULATED_MTSPR_EXITS, 137 EMULATED_MFSPR_EXITS, 138 EMULATED_MTMSR_EXITS, 139 EMULATED_MFMSR_EXITS, 140 EMULATED_TLBSX_EXITS, 141 EMULATED_TLBWE_EXITS, 142 EMULATED_RFI_EXITS, 143 DEC_EXITS, 144 EXT_INTR_EXITS, 145 HALT_WAKEUP, 146 USR_PR_INST, 147 FP_UNAVAIL, 148 DEBUG_EXITS, 149 TIMEINGUEST, 150 __NUMBER_OF_KVM_EXIT_TYPES 151 }; 152 153 /* allow access to big endian 32bit upper/lower parts and 64bit var */ 154 struct kvmppc_exit_timing { 155 union { 156 u64 tv64; 157 struct { 158 u32 tbu, tbl; 159 } tv32; 160 }; 161 }; 162 163 struct kvmppc_pginfo { 164 unsigned long pfn; 165 atomic_t refcnt; 166 }; 167 168 struct kvmppc_spapr_tce_table { 169 struct list_head list; 170 struct kvm *kvm; 171 u64 liobn; 172 u32 window_size; 173 struct page *pages[0]; 174 }; 175 176 struct kvmppc_linear_info { 177 void *base_virt; 178 unsigned long base_pfn; 179 unsigned long npages; 180 struct list_head list; 181 atomic_t use_count; 182 int type; 183 }; 184 185 /* 186 * The reverse mapping array has one entry for each HPTE, 187 * which stores the guest's view of the second word of the HPTE 188 * (including the guest physical address of the mapping), 189 * plus forward and backward pointers in a doubly-linked ring 190 * of HPTEs that map the same host page. The pointers in this 191 * ring are 32-bit HPTE indexes, to save space. 192 */ 193 struct revmap_entry { 194 unsigned long guest_rpte; 195 unsigned int forw, back; 196 }; 197 198 /* 199 * We use the top bit of each memslot->rmap entry as a lock bit, 200 * and bit 32 as a present flag. The bottom 32 bits are the 201 * index in the guest HPT of a HPTE that points to the page. 202 */ 203 #define KVMPPC_RMAP_LOCK_BIT 63 204 #define KVMPPC_RMAP_RC_SHIFT 32 205 #define KVMPPC_RMAP_REFERENCED (HPTE_R_R << KVMPPC_RMAP_RC_SHIFT) 206 #define KVMPPC_RMAP_CHANGED (HPTE_R_C << KVMPPC_RMAP_RC_SHIFT) 207 #define KVMPPC_RMAP_PRESENT 0x100000000ul 208 #define KVMPPC_RMAP_INDEX 0xfffffffful 209 210 /* Low-order bits in kvm->arch.slot_phys[][] */ 211 #define KVMPPC_PAGE_ORDER_MASK 0x1f 212 #define KVMPPC_PAGE_NO_CACHE HPTE_R_I /* 0x20 */ 213 #define KVMPPC_PAGE_WRITETHRU HPTE_R_W /* 0x40 */ 214 #define KVMPPC_GOT_PAGE 0x80 215 216 struct kvm_arch_memory_slot { 217 }; 218 219 struct kvm_arch { 220 #ifdef CONFIG_KVM_BOOK3S_64_HV 221 unsigned long hpt_virt; 222 struct revmap_entry *revmap; 223 unsigned int lpid; 224 unsigned int host_lpid; 225 unsigned long host_lpcr; 226 unsigned long sdr1; 227 unsigned long host_sdr1; 228 int tlbie_lock; 229 unsigned long lpcr; 230 unsigned long rmor; 231 struct kvmppc_linear_info *rma; 232 unsigned long vrma_slb_v; 233 int rma_setup_done; 234 int using_mmu_notifiers; 235 struct list_head spapr_tce_tables; 236 spinlock_t slot_phys_lock; 237 unsigned long *slot_phys[KVM_MEM_SLOTS_NUM]; 238 int slot_npages[KVM_MEM_SLOTS_NUM]; 239 unsigned short last_vcpu[NR_CPUS]; 240 struct kvmppc_vcore *vcores[KVM_MAX_VCORES]; 241 struct kvmppc_linear_info *hpt_li; 242 #endif /* CONFIG_KVM_BOOK3S_64_HV */ 243 }; 244 245 /* 246 * Struct for a virtual core. 247 * Note: entry_exit_count combines an entry count in the bottom 8 bits 248 * and an exit count in the next 8 bits. This is so that we can 249 * atomically increment the entry count iff the exit count is 0 250 * without taking the lock. 251 */ 252 struct kvmppc_vcore { 253 int n_runnable; 254 int n_busy; 255 int num_threads; 256 int entry_exit_count; 257 int n_woken; 258 int nap_count; 259 int napping_threads; 260 u16 pcpu; 261 u8 vcore_state; 262 u8 in_guest; 263 struct list_head runnable_threads; 264 spinlock_t lock; 265 wait_queue_head_t wq; 266 }; 267 268 #define VCORE_ENTRY_COUNT(vc) ((vc)->entry_exit_count & 0xff) 269 #define VCORE_EXIT_COUNT(vc) ((vc)->entry_exit_count >> 8) 270 271 /* Values for vcore_state */ 272 #define VCORE_INACTIVE 0 273 #define VCORE_RUNNING 1 274 #define VCORE_EXITING 2 275 #define VCORE_SLEEPING 3 276 277 struct kvmppc_pte { 278 ulong eaddr; 279 u64 vpage; 280 ulong raddr; 281 bool may_read : 1; 282 bool may_write : 1; 283 bool may_execute : 1; 284 }; 285 286 struct kvmppc_mmu { 287 /* book3s_64 only */ 288 void (*slbmte)(struct kvm_vcpu *vcpu, u64 rb, u64 rs); 289 u64 (*slbmfee)(struct kvm_vcpu *vcpu, u64 slb_nr); 290 u64 (*slbmfev)(struct kvm_vcpu *vcpu, u64 slb_nr); 291 void (*slbie)(struct kvm_vcpu *vcpu, u64 slb_nr); 292 void (*slbia)(struct kvm_vcpu *vcpu); 293 /* book3s */ 294 void (*mtsrin)(struct kvm_vcpu *vcpu, u32 srnum, ulong value); 295 u32 (*mfsrin)(struct kvm_vcpu *vcpu, u32 srnum); 296 int (*xlate)(struct kvm_vcpu *vcpu, gva_t eaddr, struct kvmppc_pte *pte, bool data); 297 void (*reset_msr)(struct kvm_vcpu *vcpu); 298 void (*tlbie)(struct kvm_vcpu *vcpu, ulong addr, bool large); 299 int (*esid_to_vsid)(struct kvm_vcpu *vcpu, ulong esid, u64 *vsid); 300 u64 (*ea_to_vp)(struct kvm_vcpu *vcpu, gva_t eaddr, bool data); 301 bool (*is_dcbz32)(struct kvm_vcpu *vcpu); 302 }; 303 304 struct kvmppc_slb { 305 u64 esid; 306 u64 vsid; 307 u64 orige; 308 u64 origv; 309 bool valid : 1; 310 bool Ks : 1; 311 bool Kp : 1; 312 bool nx : 1; 313 bool large : 1; /* PTEs are 16MB */ 314 bool tb : 1; /* 1TB segment */ 315 bool class : 1; 316 }; 317 318 struct kvm_vcpu_arch { 319 ulong host_stack; 320 u32 host_pid; 321 #ifdef CONFIG_PPC_BOOK3S 322 struct kvmppc_slb slb[64]; 323 int slb_max; /* 1 + index of last valid entry in slb[] */ 324 int slb_nr; /* total number of entries in SLB */ 325 struct kvmppc_mmu mmu; 326 #endif 327 328 ulong gpr[32]; 329 330 u64 fpr[32]; 331 u64 fpscr; 332 333 #ifdef CONFIG_SPE 334 ulong evr[32]; 335 ulong spefscr; 336 ulong host_spefscr; 337 u64 acc; 338 #endif 339 #ifdef CONFIG_ALTIVEC 340 vector128 vr[32]; 341 vector128 vscr; 342 #endif 343 344 #ifdef CONFIG_VSX 345 u64 vsr[64]; 346 #endif 347 348 #ifdef CONFIG_PPC_BOOK3S 349 /* For Gekko paired singles */ 350 u32 qpr[32]; 351 #endif 352 353 ulong pc; 354 ulong ctr; 355 ulong lr; 356 357 ulong xer; 358 u32 cr; 359 360 #ifdef CONFIG_PPC_BOOK3S 361 ulong hflags; 362 ulong guest_owned_ext; 363 ulong purr; 364 ulong spurr; 365 ulong dscr; 366 ulong amr; 367 ulong uamor; 368 u32 ctrl; 369 ulong dabr; 370 #endif 371 u32 vrsave; /* also USPRG0 */ 372 u32 mmucr; 373 ulong shadow_msr; 374 ulong csrr0; 375 ulong csrr1; 376 ulong dsrr0; 377 ulong dsrr1; 378 ulong mcsrr0; 379 ulong mcsrr1; 380 ulong mcsr; 381 u32 dec; 382 u32 decar; 383 u32 tbl; 384 u32 tbu; 385 u32 tcr; 386 ulong tsr; /* we need to perform set/clr_bits() which requires ulong */ 387 u32 ivor[64]; 388 ulong ivpr; 389 u32 pvr; 390 391 u32 shadow_pid; 392 u32 shadow_pid1; 393 u32 pid; 394 u32 swap_pid; 395 396 u32 ccr0; 397 u32 ccr1; 398 u32 dbcr0; 399 u32 dbcr1; 400 u32 dbsr; 401 402 u64 mmcr[3]; 403 u32 pmc[8]; 404 405 #ifdef CONFIG_KVM_EXIT_TIMING 406 struct mutex exit_timing_lock; 407 struct kvmppc_exit_timing timing_exit; 408 struct kvmppc_exit_timing timing_last_enter; 409 u32 last_exit_type; 410 u32 timing_count_type[__NUMBER_OF_KVM_EXIT_TYPES]; 411 u64 timing_sum_duration[__NUMBER_OF_KVM_EXIT_TYPES]; 412 u64 timing_sum_quad_duration[__NUMBER_OF_KVM_EXIT_TYPES]; 413 u64 timing_min_duration[__NUMBER_OF_KVM_EXIT_TYPES]; 414 u64 timing_max_duration[__NUMBER_OF_KVM_EXIT_TYPES]; 415 u64 timing_last_exit; 416 struct dentry *debugfs_exit_timing; 417 #endif 418 419 #ifdef CONFIG_PPC_BOOK3S 420 ulong fault_dar; 421 u32 fault_dsisr; 422 #endif 423 424 #ifdef CONFIG_BOOKE 425 ulong fault_dear; 426 ulong fault_esr; 427 ulong queued_dear; 428 ulong queued_esr; 429 #endif 430 gpa_t paddr_accessed; 431 432 u8 io_gpr; /* GPR used as IO source/target */ 433 u8 mmio_is_bigendian; 434 u8 mmio_sign_extend; 435 u8 dcr_needed; 436 u8 dcr_is_write; 437 u8 osi_needed; 438 u8 osi_enabled; 439 u8 papr_enabled; 440 u8 sane; 441 u8 cpu_type; 442 u8 hcall_needed; 443 444 u32 cpr0_cfgaddr; /* holds the last set cpr0_cfgaddr */ 445 446 struct hrtimer dec_timer; 447 struct tasklet_struct tasklet; 448 u64 dec_jiffies; 449 u64 dec_expires; 450 unsigned long pending_exceptions; 451 u16 last_cpu; 452 u8 ceded; 453 u8 prodded; 454 u32 last_inst; 455 456 struct lppaca *vpa; 457 struct slb_shadow *slb_shadow; 458 struct dtl *dtl; 459 struct dtl *dtl_end; 460 461 wait_queue_head_t *wqp; 462 struct kvmppc_vcore *vcore; 463 int ret; 464 int trap; 465 int state; 466 int ptid; 467 bool timer_running; 468 wait_queue_head_t cpu_run; 469 470 struct kvm_vcpu_arch_shared *shared; 471 unsigned long magic_page_pa; /* phys addr to map the magic page to */ 472 unsigned long magic_page_ea; /* effect. addr to map the magic page to */ 473 474 #ifdef CONFIG_KVM_BOOK3S_64_HV 475 struct kvm_vcpu_arch_shared shregs; 476 477 unsigned long pgfault_addr; 478 long pgfault_index; 479 unsigned long pgfault_hpte[2]; 480 481 struct list_head run_list; 482 struct task_struct *run_task; 483 struct kvm_run *kvm_run; 484 pgd_t *pgdir; 485 #endif 486 }; 487 488 /* Values for vcpu->arch.state */ 489 #define KVMPPC_VCPU_STOPPED 0 490 #define KVMPPC_VCPU_BUSY_IN_HOST 1 491 #define KVMPPC_VCPU_RUNNABLE 2 492 493 /* Values for vcpu->arch.io_gpr */ 494 #define KVM_MMIO_REG_MASK 0x001f 495 #define KVM_MMIO_REG_EXT_MASK 0xffe0 496 #define KVM_MMIO_REG_GPR 0x0000 497 #define KVM_MMIO_REG_FPR 0x0020 498 #define KVM_MMIO_REG_QPR 0x0040 499 #define KVM_MMIO_REG_FQPR 0x0060 500 501 #endif /* __POWERPC_KVM_HOST_H__ */ 502