arch/powerpc/include/asm/kvm_book3s.h

   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 SUSE Linux Products GmbH 2009
  16  *
  17  * Authors: Alexander Graf <agraf@suse.de>
  18  */
  19
  20 #ifndef __ASM_KVM_BOOK3S_H__
  21 #define __ASM_KVM_BOOK3S_H__
  22
  23 #include <linux/types.h>
  24 #include <linux/kvm_host.h>
  25 #include <asm/kvm_book3s_asm.h>
  26
  27 struct kvmppc_bat {
  28         u64 raw;
  29         u32 bepi;
  30         u32 bepi_mask;
  31         u32 brpn;
  32         u8 wimg;
  33         u8 pp;
  34         bool vs         : 1;
  35         bool vp         : 1;
  36 };
  37
  38 struct kvmppc_sid_map {
  39         u64 guest_vsid;
  40         u64 guest_esid;
  41         u64 host_vsid;
  42         bool valid      : 1;
  43 };
  44
  45 #define SID_MAP_BITS    9
  46 #define SID_MAP_NUM     (1 << SID_MAP_BITS)
  47 #define SID_MAP_MASK    (SID_MAP_NUM - 1)
  48
  49 #ifdef CONFIG_PPC_BOOK3S_64
  50 #define SID_CONTEXTS    1
  51 #else
  52 #define SID_CONTEXTS    128
  53 #define VSID_POOL_SIZE  (SID_CONTEXTS * 16)
  54 #endif
  55
  56 struct hpte_cache {
  57         struct hlist_node list_pte;
  58         struct hlist_node list_pte_long;
  59         struct hlist_node list_vpte;
  60         struct hlist_node list_vpte_long;
  61         struct rcu_head rcu_head;
  62         u64 host_vpn;
  63         u64 pfn;
  64         ulong slot;
  65         struct kvmppc_pte pte;
  66 };
  67
  68 struct kvmppc_vcpu_book3s {
  69         struct kvm_vcpu vcpu;
  70         struct kvmppc_book3s_shadow_vcpu *shadow_vcpu;
  71         struct kvmppc_sid_map sid_map[SID_MAP_NUM];
  72         struct {
  73                 u64 esid;
  74                 u64 vsid;
  75         } slb_shadow[64];
  76         u8 slb_shadow_max;
  77         struct kvmppc_bat ibat[8];
  78         struct kvmppc_bat dbat[8];
  79         u64 hid[6];
  80         u64 gqr[8];
  81         u64 sdr1;
  82         u64 hior;
  83         u64 msr_mask;
  84         u64 purr_offset;
  85         u64 spurr_offset;
  86 #ifdef CONFIG_PPC_BOOK3S_32
  87         u32 vsid_pool[VSID_POOL_SIZE];
  88         u32 vsid_next;
  89 #else
  90         u64 proto_vsid_first;
  91         u64 proto_vsid_max;
  92         u64 proto_vsid_next;
  93 #endif
  94         int context_id[SID_CONTEXTS];
  95
  96         bool hior_explicit;             /* HIOR is set by ioctl, not PVR */
  97
  98         struct hlist_head hpte_hash_pte[HPTEG_HASH_NUM_PTE];
  99         struct hlist_head hpte_hash_pte_long[HPTEG_HASH_NUM_PTE_LONG];
 100         struct hlist_head hpte_hash_vpte[HPTEG_HASH_NUM_VPTE];
 101         struct hlist_head hpte_hash_vpte_long[HPTEG_HASH_NUM_VPTE_LONG];
 102         int hpte_cache_count;
 103         spinlock_t mmu_lock;
 104 };
 105
 106 #define CONTEXT_HOST            0
 107 #define CONTEXT_GUEST           1
 108 #define CONTEXT_GUEST_END       2
 109
 110 #define VSID_REAL       0x0fffffffffc00000ULL
 111 #define VSID_BAT        0x0fffffffffb00000ULL
 112 #define VSID_1T         0x1000000000000000ULL
 113 #define VSID_REAL_DR    0x2000000000000000ULL
 114 #define VSID_REAL_IR    0x4000000000000000ULL
 115 #define VSID_PR         0x8000000000000000ULL
 116
 117 extern void kvmppc_mmu_pte_flush(struct kvm_vcpu *vcpu, ulong ea, ulong ea_mask);
 118 extern void kvmppc_mmu_pte_vflush(struct kvm_vcpu *vcpu, u64 vp, u64 vp_mask);
 119 extern void kvmppc_mmu_pte_pflush(struct kvm_vcpu *vcpu, ulong pa_start, ulong pa_end);
 120 extern void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 new_msr);
 121 extern void kvmppc_set_pvr(struct kvm_vcpu *vcpu, u32 pvr);
 122 extern void kvmppc_mmu_book3s_64_init(struct kvm_vcpu *vcpu);
 123 extern void kvmppc_mmu_book3s_32_init(struct kvm_vcpu *vcpu);
 124 extern void kvmppc_mmu_book3s_hv_init(struct kvm_vcpu *vcpu);
 125 extern int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte);
 126 extern int kvmppc_mmu_map_segment(struct kvm_vcpu *vcpu, ulong eaddr);
 127 extern void kvmppc_mmu_flush_segment(struct kvm_vcpu *vcpu, ulong eaddr, ulong seg_size);
 128 extern void kvmppc_mmu_flush_segments(struct kvm_vcpu *vcpu);
 129 extern int kvmppc_book3s_hv_page_fault(struct kvm_run *run,
 130                         struct kvm_vcpu *vcpu, unsigned long addr,
 131                         unsigned long status);
 132 extern long kvmppc_hv_find_lock_hpte(struct kvm *kvm, gva_t eaddr,
 133                         unsigned long slb_v, unsigned long valid);
 134
 135 extern void kvmppc_mmu_hpte_cache_map(struct kvm_vcpu *vcpu, struct hpte_cache *pte);
 136 extern struct hpte_cache *kvmppc_mmu_hpte_cache_next(struct kvm_vcpu *vcpu);
 137 extern void kvmppc_mmu_hpte_destroy(struct kvm_vcpu *vcpu);
 138 extern int kvmppc_mmu_hpte_init(struct kvm_vcpu *vcpu);
 139 extern void kvmppc_mmu_invalidate_pte(struct kvm_vcpu *vcpu, struct hpte_cache *pte);
 140 extern int kvmppc_mmu_hpte_sysinit(void);
 141 extern void kvmppc_mmu_hpte_sysexit(void);
 142 extern int kvmppc_mmu_hv_init(void);
 143
 144 extern int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, bool data);
 145 extern int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, bool data);
 146 extern void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec);
 147 extern void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
 148                                           unsigned int vec);
 149 extern void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags);
 150 extern void kvmppc_set_bat(struct kvm_vcpu *vcpu, struct kvmppc_bat *bat,
 151                            bool upper, u32 val);
 152 extern void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr);
 153 extern int kvmppc_emulate_paired_single(struct kvm_run *run, struct kvm_vcpu *vcpu);
 154 extern pfn_t kvmppc_gfn_to_pfn(struct kvm_vcpu *vcpu, gfn_t gfn);
 155 extern void kvmppc_add_revmap_chain(struct kvm *kvm, struct revmap_entry *rev,
 156                         unsigned long *rmap, long pte_index, int realmode);
 157 extern void kvmppc_invalidate_hpte(struct kvm *kvm, unsigned long *hptep,
 158                         unsigned long pte_index);
 159 void kvmppc_clear_ref_hpte(struct kvm *kvm, unsigned long *hptep,
 160                         unsigned long pte_index);
 161 extern void *kvmppc_pin_guest_page(struct kvm *kvm, unsigned long addr,
 162                         unsigned long *nb_ret);
 163 extern void kvmppc_unpin_guest_page(struct kvm *kvm, void *addr,
 164                         unsigned long gpa, bool dirty);
 165 extern long kvmppc_virtmode_h_enter(struct kvm_vcpu *vcpu, unsigned long flags,
 166                         long pte_index, unsigned long pteh, unsigned long ptel);
 167 extern long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags,
 168                         long pte_index, unsigned long pteh, unsigned long ptel,
 169                         pgd_t *pgdir, bool realmode, unsigned long *idx_ret);
 170 extern long kvmppc_do_h_remove(struct kvm *kvm, unsigned long flags,
 171                         unsigned long pte_index, unsigned long avpn,
 172                         unsigned long *hpret);
 173 extern long kvmppc_hv_get_dirty_log(struct kvm *kvm,
 174                         struct kvm_memory_slot *memslot, unsigned long *map);
 175
 176 extern void kvmppc_entry_trampoline(void);
 177 extern void kvmppc_hv_entry_trampoline(void);
 178 extern void kvmppc_load_up_fpu(void);
 179 extern void kvmppc_load_up_altivec(void);
 180 extern void kvmppc_load_up_vsx(void);
 181 extern u32 kvmppc_alignment_dsisr(struct kvm_vcpu *vcpu, unsigned int inst);
 182 extern ulong kvmppc_alignment_dar(struct kvm_vcpu *vcpu, unsigned int inst);
 183 extern int kvmppc_h_pr(struct kvm_vcpu *vcpu, unsigned long cmd);
 184
 185 static inline struct kvmppc_vcpu_book3s *to_book3s(struct kvm_vcpu *vcpu)
 186 {
 187         return container_of(vcpu, struct kvmppc_vcpu_book3s, vcpu);
 188 }
 189
 190 extern void kvm_return_point(void);
 191
 192 /* Also add subarch specific defines */
 193
 194 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
 195 #include <asm/kvm_book3s_32.h>
 196 #endif
 197 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
 198 #include <asm/kvm_book3s_64.h>
 199 #endif
 200
 201 #ifdef CONFIG_KVM_BOOK3S_PR
 202
 203 static inline unsigned long kvmppc_interrupt_offset(struct kvm_vcpu *vcpu)
 204 {
 205         return to_book3s(vcpu)->hior;
 206 }
 207
 208 static inline void kvmppc_update_int_pending(struct kvm_vcpu *vcpu,
 209                         unsigned long pending_now, unsigned long old_pending)
 210 {
 211         if (pending_now)
 212                 vcpu->arch.shared->int_pending = 1;
 213         else if (old_pending)
 214                 vcpu->arch.shared->int_pending = 0;
 215 }
 216
 217 static inline void kvmppc_set_gpr(struct kvm_vcpu *vcpu, int num, ulong val)
 218 {
 219         if ( num < 14 ) {
 220                 struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 221                 svcpu->gpr[num] = val;
 222                 svcpu_put(svcpu);
 223                 to_book3s(vcpu)->shadow_vcpu->gpr[num] = val;
 224         } else
 225                 vcpu->arch.gpr[num] = val;
 226 }
 227
 228 static inline ulong kvmppc_get_gpr(struct kvm_vcpu *vcpu, int num)
 229 {
 230         if ( num < 14 ) {
 231                 struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 232                 ulong r = svcpu->gpr[num];
 233                 svcpu_put(svcpu);
 234                 return r;
 235         } else
 236                 return vcpu->arch.gpr[num];
 237 }
 238
 239 static inline void kvmppc_set_cr(struct kvm_vcpu *vcpu, u32 val)
 240 {
 241         struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 242         svcpu->cr = val;
 243         svcpu_put(svcpu);
 244         to_book3s(vcpu)->shadow_vcpu->cr = val;
 245 }
 246
 247 static inline u32 kvmppc_get_cr(struct kvm_vcpu *vcpu)
 248 {
 249         struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 250         u32 r;
 251         r = svcpu->cr;
 252         svcpu_put(svcpu);
 253         return r;
 254 }
 255
 256 static inline void kvmppc_set_xer(struct kvm_vcpu *vcpu, u32 val)
 257 {
 258         struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 259         svcpu->xer = val;
 260         to_book3s(vcpu)->shadow_vcpu->xer = val;
 261         svcpu_put(svcpu);
 262 }
 263
 264 static inline u32 kvmppc_get_xer(struct kvm_vcpu *vcpu)
 265 {
 266         struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 267         u32 r;
 268         r = svcpu->xer;
 269         svcpu_put(svcpu);
 270         return r;
 271 }
 272
 273 static inline void kvmppc_set_ctr(struct kvm_vcpu *vcpu, ulong val)
 274 {
 275         struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 276         svcpu->ctr = val;
 277         svcpu_put(svcpu);
 278 }
 279
 280 static inline ulong kvmppc_get_ctr(struct kvm_vcpu *vcpu)
 281 {
 282         struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 283         ulong r;
 284         r = svcpu->ctr;
 285         svcpu_put(svcpu);
 286         return r;
 287 }
 288
 289 static inline void kvmppc_set_lr(struct kvm_vcpu *vcpu, ulong val)
 290 {
 291         struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 292         svcpu->lr = val;
 293         svcpu_put(svcpu);
 294 }
 295
 296 static inline ulong kvmppc_get_lr(struct kvm_vcpu *vcpu)
 297 {
 298         struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 299         ulong r;
 300         r = svcpu->lr;
 301         svcpu_put(svcpu);
 302         return r;
 303 }
 304
 305 static inline void kvmppc_set_pc(struct kvm_vcpu *vcpu, ulong val)
 306 {
 307         struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 308         svcpu->pc = val;
 309         svcpu_put(svcpu);
 310 }
 311
 312 static inline ulong kvmppc_get_pc(struct kvm_vcpu *vcpu)
 313 {
 314         struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 315         ulong r;
 316         r = svcpu->pc;
 317         svcpu_put(svcpu);
 318         return r;
 319 }
 320
 321 static inline u32 kvmppc_get_last_inst(struct kvm_vcpu *vcpu)
 322 {
 323         ulong pc = kvmppc_get_pc(vcpu);
 324         struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 325         u32 r;
 326
 327         /* Load the instruction manually if it failed to do so in the
 328          * exit path */
 329         if (svcpu->last_inst == KVM_INST_FETCH_FAILED)
 330                 kvmppc_ld(vcpu, &pc, sizeof(u32), &svcpu->last_inst, false);
 331
 332         r = svcpu->last_inst;
 333         svcpu_put(svcpu);
 334         return r;
 335 }
 336
 337 /*
 338  * Like kvmppc_get_last_inst(), but for fetching a sc instruction.
 339  * Because the sc instruction sets SRR0 to point to the following
 340  * instruction, we have to fetch from pc - 4.
 341  */
 342 static inline u32 kvmppc_get_last_sc(struct kvm_vcpu *vcpu)
 343 {
 344         ulong pc = kvmppc_get_pc(vcpu) - 4;
 345         struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 346         u32 r;
 347
 348         /* Load the instruction manually if it failed to do so in the
 349          * exit path */
 350         if (svcpu->last_inst == KVM_INST_FETCH_FAILED)
 351                 kvmppc_ld(vcpu, &pc, sizeof(u32), &svcpu->last_inst, false);
 352
 353         r = svcpu->last_inst;
 354         svcpu_put(svcpu);
 355         return r;
 356 }
 357
 358 static inline ulong kvmppc_get_fault_dar(struct kvm_vcpu *vcpu)
 359 {
 360         struct kvmppc_book3s_shadow_vcpu *svcpu = svcpu_get(vcpu);
 361         ulong r;
 362         r = svcpu->fault_dar;
 363         svcpu_put(svcpu);
 364         return r;
 365 }
 366
 367 static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
 368 {
 369         ulong crit_raw = vcpu->arch.shared->critical;
 370         ulong crit_r1 = kvmppc_get_gpr(vcpu, 1);
 371         bool crit;
 372
 373         /* Truncate crit indicators in 32 bit mode */
 374         if (!(vcpu->arch.shared->msr & MSR_SF)) {
 375                 crit_raw &= 0xffffffff;
 376                 crit_r1 &= 0xffffffff;
 377         }
 378
 379         /* Critical section when crit == r1 */
 380         crit = (crit_raw == crit_r1);
 381         /* ... and we're in supervisor mode */
 382         crit = crit && !(vcpu->arch.shared->msr & MSR_PR);
 383
 384         return crit;
 385 }
 386 #else /* CONFIG_KVM_BOOK3S_PR */
 387
 388 static inline unsigned long kvmppc_interrupt_offset(struct kvm_vcpu *vcpu)
 389 {
 390         return 0;
 391 }
 392
 393 static inline void kvmppc_update_int_pending(struct kvm_vcpu *vcpu,
 394                         unsigned long pending_now, unsigned long old_pending)
 395 {
 396 }
 397
 398 static inline void kvmppc_set_gpr(struct kvm_vcpu *vcpu, int num, ulong val)
 399 {
 400         vcpu->arch.gpr[num] = val;
 401 }
 402
 403 static inline ulong kvmppc_get_gpr(struct kvm_vcpu *vcpu, int num)
 404 {
 405         return vcpu->arch.gpr[num];
 406 }
 407
 408 static inline void kvmppc_set_cr(struct kvm_vcpu *vcpu, u32 val)
 409 {
 410         vcpu->arch.cr = val;
 411 }
 412
 413 static inline u32 kvmppc_get_cr(struct kvm_vcpu *vcpu)
 414 {
 415         return vcpu->arch.cr;
 416 }
 417
 418 static inline void kvmppc_set_xer(struct kvm_vcpu *vcpu, u32 val)
 419 {
 420         vcpu->arch.xer = val;
 421 }
 422
 423 static inline u32 kvmppc_get_xer(struct kvm_vcpu *vcpu)
 424 {
 425         return vcpu->arch.xer;
 426 }
 427
 428 static inline void kvmppc_set_ctr(struct kvm_vcpu *vcpu, ulong val)
 429 {
 430         vcpu->arch.ctr = val;
 431 }
 432
 433 static inline ulong kvmppc_get_ctr(struct kvm_vcpu *vcpu)
 434 {
 435         return vcpu->arch.ctr;
 436 }
 437
 438 static inline void kvmppc_set_lr(struct kvm_vcpu *vcpu, ulong val)
 439 {
 440         vcpu->arch.lr = val;
 441 }
 442
 443 static inline ulong kvmppc_get_lr(struct kvm_vcpu *vcpu)
 444 {
 445         return vcpu->arch.lr;
 446 }
 447
 448 static inline void kvmppc_set_pc(struct kvm_vcpu *vcpu, ulong val)
 449 {
 450         vcpu->arch.pc = val;
 451 }
 452
 453 static inline ulong kvmppc_get_pc(struct kvm_vcpu *vcpu)
 454 {
 455         return vcpu->arch.pc;
 456 }
 457
 458 static inline u32 kvmppc_get_last_inst(struct kvm_vcpu *vcpu)
 459 {
 460         ulong pc = kvmppc_get_pc(vcpu);
 461
 462         /* Load the instruction manually if it failed to do so in the
 463          * exit path */
 464         if (vcpu->arch.last_inst == KVM_INST_FETCH_FAILED)
 465                 kvmppc_ld(vcpu, &pc, sizeof(u32), &vcpu->arch.last_inst, false);
 466
 467         return vcpu->arch.last_inst;
 468 }
 469
 470 /*
 471  * Like kvmppc_get_last_inst(), but for fetching a sc instruction.
 472  * Because the sc instruction sets SRR0 to point to the following
 473  * instruction, we have to fetch from pc - 4.
 474  */
 475 static inline u32 kvmppc_get_last_sc(struct kvm_vcpu *vcpu)
 476 {
 477         ulong pc = kvmppc_get_pc(vcpu) - 4;
 478
 479         /* Load the instruction manually if it failed to do so in the
 480          * exit path */
 481         if (vcpu->arch.last_inst == KVM_INST_FETCH_FAILED)
 482                 kvmppc_ld(vcpu, &pc, sizeof(u32), &vcpu->arch.last_inst, false);
 483
 484         return vcpu->arch.last_inst;
 485 }
 486
 487 static inline ulong kvmppc_get_fault_dar(struct kvm_vcpu *vcpu)
 488 {
 489         return vcpu->arch.fault_dar;
 490 }
 491
 492 static inline bool kvmppc_critical_section(struct kvm_vcpu *vcpu)
 493 {
 494         return false;
 495 }
 496 #endif
 497
 498 /* Magic register values loaded into r3 and r4 before the 'sc' assembly
 499  * instruction for the OSI hypercalls */
 500 #define OSI_SC_MAGIC_R3                 0x113724FA
 501 #define OSI_SC_MAGIC_R4                 0x77810F9B
 502
 503 #define INS_DCBZ                        0x7c0007ec
 504 /* TO = 31 for unconditional trap */
 505 #define INS_TW                          0x7fe00008
 506
 507 /* LPIDs we support with this build -- runtime limit may be lower */
 508 #define KVMPPC_NR_LPIDS                 (LPID_RSVD + 1)
 509
 510 #endif /* __ASM_KVM_BOOK3S_H__ */