arch/powerpc/include/asm/kvm_ppc.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 IBM Corp. 2008
  16  *
  17  * Authors: Hollis Blanchard <hollisb@us.ibm.com>
  18  */
  19
  20 #ifndef __POWERPC_KVM_PPC_H__
  21 #define __POWERPC_KVM_PPC_H__
  22
  23 /* This file exists just so we can dereference kvm_vcpu, avoiding nested header
  24  * dependencies. */
  25
  26 #include <linux/mutex.h>
  27 #include <linux/timer.h>
  28 #include <linux/types.h>
  29 #include <linux/kvm_types.h>
  30 #include <linux/kvm_host.h>
  31 #include <linux/bug.h>
  32 #ifdef CONFIG_PPC_BOOK3S
  33 #include <asm/kvm_book3s.h>
  34 #else
  35 #include <asm/kvm_booke.h>
  36 #endif
  37 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
  38 #include <asm/paca.h>
  39 #endif
  40
  41 /*
  42  * KVMPPC_INST_SW_BREAKPOINT is debug Instruction
  43  * for supporting software breakpoint.
  44  */
  45 #define KVMPPC_INST_SW_BREAKPOINT       0x00dddd00
  46
  47 enum emulation_result {
  48         EMULATE_DONE,         /* no further processing */
  49         EMULATE_DO_MMIO,      /* kvm_run filled with MMIO request */
  50         EMULATE_FAIL,         /* can't emulate this instruction */
  51         EMULATE_AGAIN,        /* something went wrong. go again */
  52         EMULATE_EXIT_USER,    /* emulation requires exit to user-space */
  53 };
  54
  55 enum instruction_type {
  56         INST_GENERIC,
  57         INST_SC,                /* system call */
  58 };
  59
  60 enum xlate_instdata {
  61         XLATE_INST,             /* translate instruction address */
  62         XLATE_DATA              /* translate data address */
  63 };
  64
  65 enum xlate_readwrite {
  66         XLATE_READ,             /* check for read permissions */
  67         XLATE_WRITE             /* check for write permissions */
  68 };
  69
  70 extern int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu);
  71 extern int __kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu);
  72 extern void kvmppc_handler_highmem(void);
  73
  74 extern void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu);
  75 extern int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
  76                               unsigned int rt, unsigned int bytes,
  77                               int is_default_endian);
  78 extern int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
  79                                unsigned int rt, unsigned int bytes,
  80                                int is_default_endian);
  81 extern int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
  82                                u64 val, unsigned int bytes,
  83                                int is_default_endian);
  84
  85 extern int kvmppc_load_last_inst(struct kvm_vcpu *vcpu,
  86                                  enum instruction_type type, u32 *inst);
  87
  88 extern int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
  89                      bool data);
  90 extern int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
  91                      bool data);
  92 extern int kvmppc_emulate_instruction(struct kvm_run *run,
  93                                       struct kvm_vcpu *vcpu);
  94 extern int kvmppc_emulate_loadstore(struct kvm_vcpu *vcpu);
  95 extern int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu);
  96 extern void kvmppc_emulate_dec(struct kvm_vcpu *vcpu);
  97 extern u32 kvmppc_get_dec(struct kvm_vcpu *vcpu, u64 tb);
  98 extern void kvmppc_decrementer_func(struct kvm_vcpu *vcpu);
  99 extern int kvmppc_sanity_check(struct kvm_vcpu *vcpu);
 100 extern int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu);
 101 extern void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu);
 102
 103 /* Core-specific hooks */
 104
 105 extern void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 gvaddr, gpa_t gpaddr,
 106                            unsigned int gtlb_idx);
 107 extern void kvmppc_mmu_priv_switch(struct kvm_vcpu *vcpu, int usermode);
 108 extern void kvmppc_mmu_switch_pid(struct kvm_vcpu *vcpu, u32 pid);
 109 extern void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu);
 110 extern int kvmppc_mmu_init(struct kvm_vcpu *vcpu);
 111 extern int kvmppc_mmu_dtlb_index(struct kvm_vcpu *vcpu, gva_t eaddr);
 112 extern int kvmppc_mmu_itlb_index(struct kvm_vcpu *vcpu, gva_t eaddr);
 113 extern gpa_t kvmppc_mmu_xlate(struct kvm_vcpu *vcpu, unsigned int gtlb_index,
 114                               gva_t eaddr);
 115 extern void kvmppc_mmu_dtlb_miss(struct kvm_vcpu *vcpu);
 116 extern void kvmppc_mmu_itlb_miss(struct kvm_vcpu *vcpu);
 117 extern int kvmppc_xlate(struct kvm_vcpu *vcpu, ulong eaddr,
 118                         enum xlate_instdata xlid, enum xlate_readwrite xlrw,
 119                         struct kvmppc_pte *pte);
 120
 121 extern struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm,
 122                                                 unsigned int id);
 123 extern void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu);
 124 extern int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu);
 125 extern int kvmppc_core_check_processor_compat(void);
 126 extern int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu,
 127                                       struct kvm_translation *tr);
 128
 129 extern void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
 130 extern void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu);
 131
 132 extern int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu);
 133 extern int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu);
 134 extern void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags);
 135 extern void kvmppc_core_queue_fpunavail(struct kvm_vcpu *vcpu);
 136 extern void kvmppc_core_queue_vec_unavail(struct kvm_vcpu *vcpu);
 137 extern void kvmppc_core_queue_vsx_unavail(struct kvm_vcpu *vcpu);
 138 extern void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu);
 139 extern void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu);
 140 extern void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
 141                                        struct kvm_interrupt *irq);
 142 extern void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu);
 143 extern void kvmppc_core_queue_dtlb_miss(struct kvm_vcpu *vcpu, ulong dear_flags,
 144                                         ulong esr_flags);
 145 extern void kvmppc_core_queue_data_storage(struct kvm_vcpu *vcpu,
 146                                            ulong dear_flags,
 147                                            ulong esr_flags);
 148 extern void kvmppc_core_queue_itlb_miss(struct kvm_vcpu *vcpu);
 149 extern void kvmppc_core_queue_inst_storage(struct kvm_vcpu *vcpu,
 150                                            ulong esr_flags);
 151 extern void kvmppc_core_flush_tlb(struct kvm_vcpu *vcpu);
 152 extern int kvmppc_core_check_requests(struct kvm_vcpu *vcpu);
 153
 154 extern int kvmppc_booke_init(void);
 155 extern void kvmppc_booke_exit(void);
 156
 157 extern void kvmppc_core_destroy_mmu(struct kvm_vcpu *vcpu);
 158 extern int kvmppc_kvm_pv(struct kvm_vcpu *vcpu);
 159 extern void kvmppc_map_magic(struct kvm_vcpu *vcpu);
 160
 161 extern int kvmppc_allocate_hpt(struct kvm_hpt_info *info, u32 order);
 162 extern void kvmppc_set_hpt(struct kvm *kvm, struct kvm_hpt_info *info);
 163 extern long kvmppc_alloc_reset_hpt(struct kvm *kvm, int order);
 164 extern void kvmppc_free_hpt(struct kvm_hpt_info *info);
 165 extern long kvmppc_prepare_vrma(struct kvm *kvm,
 166                                 struct kvm_userspace_memory_region *mem);
 167 extern void kvmppc_map_vrma(struct kvm_vcpu *vcpu,
 168                         struct kvm_memory_slot *memslot, unsigned long porder);
 169 extern int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu);
 170
 171 extern long kvm_vm_ioctl_create_spapr_tce(struct kvm *kvm,
 172                                 struct kvm_create_spapr_tce_64 *args);
 173 extern struct kvmppc_spapr_tce_table *kvmppc_find_table(
 174                 struct kvm_vcpu *vcpu, unsigned long liobn);
 175 extern long kvmppc_ioba_validate(struct kvmppc_spapr_tce_table *stt,
 176                 unsigned long ioba, unsigned long npages);
 177 extern long kvmppc_tce_validate(struct kvmppc_spapr_tce_table *tt,
 178                 unsigned long tce);
 179 extern long kvmppc_gpa_to_ua(struct kvm *kvm, unsigned long gpa,
 180                 unsigned long *ua, unsigned long **prmap);
 181 extern void kvmppc_tce_put(struct kvmppc_spapr_tce_table *tt,
 182                 unsigned long idx, unsigned long tce);
 183 extern long kvmppc_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
 184                              unsigned long ioba, unsigned long tce);
 185 extern long kvmppc_h_put_tce_indirect(struct kvm_vcpu *vcpu,
 186                 unsigned long liobn, unsigned long ioba,
 187                 unsigned long tce_list, unsigned long npages);
 188 extern long kvmppc_h_stuff_tce(struct kvm_vcpu *vcpu,
 189                 unsigned long liobn, unsigned long ioba,
 190                 unsigned long tce_value, unsigned long npages);
 191 extern long kvmppc_h_get_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
 192                              unsigned long ioba);
 193 extern struct page *kvm_alloc_hpt_cma(unsigned long nr_pages);
 194 extern void kvm_free_hpt_cma(struct page *page, unsigned long nr_pages);
 195 extern int kvmppc_core_init_vm(struct kvm *kvm);
 196 extern void kvmppc_core_destroy_vm(struct kvm *kvm);
 197 extern void kvmppc_core_free_memslot(struct kvm *kvm,
 198                                      struct kvm_memory_slot *free,
 199                                      struct kvm_memory_slot *dont);
 200 extern int kvmppc_core_create_memslot(struct kvm *kvm,
 201                                       struct kvm_memory_slot *slot,
 202                                       unsigned long npages);
 203 extern int kvmppc_core_prepare_memory_region(struct kvm *kvm,
 204                                 struct kvm_memory_slot *memslot,
 205                                 const struct kvm_userspace_memory_region *mem);
 206 extern void kvmppc_core_commit_memory_region(struct kvm *kvm,
 207                                 const struct kvm_userspace_memory_region *mem,
 208                                 const struct kvm_memory_slot *old,
 209                                 const struct kvm_memory_slot *new);
 210 extern int kvm_vm_ioctl_get_smmu_info(struct kvm *kvm,
 211                                       struct kvm_ppc_smmu_info *info);
 212 extern void kvmppc_core_flush_memslot(struct kvm *kvm,
 213                                       struct kvm_memory_slot *memslot);
 214
 215 extern int kvmppc_bookehv_init(void);
 216 extern void kvmppc_bookehv_exit(void);
 217
 218 extern int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu);
 219
 220 extern int kvm_vm_ioctl_get_htab_fd(struct kvm *kvm, struct kvm_get_htab_fd *);
 221 extern long kvm_vm_ioctl_resize_hpt_prepare(struct kvm *kvm,
 222                                             struct kvm_ppc_resize_hpt *rhpt);
 223 extern long kvm_vm_ioctl_resize_hpt_commit(struct kvm *kvm,
 224                                            struct kvm_ppc_resize_hpt *rhpt);
 225
 226 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq);
 227
 228 extern int kvm_vm_ioctl_rtas_define_token(struct kvm *kvm, void __user *argp);
 229 extern int kvmppc_rtas_hcall(struct kvm_vcpu *vcpu);
 230 extern void kvmppc_rtas_tokens_free(struct kvm *kvm);
 231 extern int kvmppc_xics_set_xive(struct kvm *kvm, u32 irq, u32 server,
 232                                 u32 priority);
 233 extern int kvmppc_xics_get_xive(struct kvm *kvm, u32 irq, u32 *server,
 234                                 u32 *priority);
 235 extern int kvmppc_xics_int_on(struct kvm *kvm, u32 irq);
 236 extern int kvmppc_xics_int_off(struct kvm *kvm, u32 irq);
 237
 238 void kvmppc_core_dequeue_debug(struct kvm_vcpu *vcpu);
 239 void kvmppc_core_queue_debug(struct kvm_vcpu *vcpu);
 240
 241 union kvmppc_one_reg {
 242         u32     wval;
 243         u64     dval;
 244         vector128 vval;
 245         u64     vsxval[2];
 246         struct {
 247                 u64     addr;
 248                 u64     length;
 249         }       vpaval;
 250 };
 251
 252 struct kvmppc_ops {
 253         struct module *owner;
 254         int (*get_sregs)(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
 255         int (*set_sregs)(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
 256         int (*get_one_reg)(struct kvm_vcpu *vcpu, u64 id,
 257                            union kvmppc_one_reg *val);
 258         int (*set_one_reg)(struct kvm_vcpu *vcpu, u64 id,
 259                            union kvmppc_one_reg *val);
 260         void (*vcpu_load)(struct kvm_vcpu *vcpu, int cpu);
 261         void (*vcpu_put)(struct kvm_vcpu *vcpu);
 262         void (*set_msr)(struct kvm_vcpu *vcpu, u64 msr);
 263         int (*vcpu_run)(struct kvm_run *run, struct kvm_vcpu *vcpu);
 264         struct kvm_vcpu *(*vcpu_create)(struct kvm *kvm, unsigned int id);
 265         void (*vcpu_free)(struct kvm_vcpu *vcpu);
 266         int (*check_requests)(struct kvm_vcpu *vcpu);
 267         int (*get_dirty_log)(struct kvm *kvm, struct kvm_dirty_log *log);
 268         void (*flush_memslot)(struct kvm *kvm, struct kvm_memory_slot *memslot);
 269         int (*prepare_memory_region)(struct kvm *kvm,
 270                                      struct kvm_memory_slot *memslot,
 271                                      const struct kvm_userspace_memory_region *mem);
 272         void (*commit_memory_region)(struct kvm *kvm,
 273                                      const struct kvm_userspace_memory_region *mem,
 274                                      const struct kvm_memory_slot *old,
 275                                      const struct kvm_memory_slot *new);
 276         int (*unmap_hva)(struct kvm *kvm, unsigned long hva);
 277         int (*unmap_hva_range)(struct kvm *kvm, unsigned long start,
 278                            unsigned long end);
 279         int (*age_hva)(struct kvm *kvm, unsigned long start, unsigned long end);
 280         int (*test_age_hva)(struct kvm *kvm, unsigned long hva);
 281         void (*set_spte_hva)(struct kvm *kvm, unsigned long hva, pte_t pte);
 282         void (*mmu_destroy)(struct kvm_vcpu *vcpu);
 283         void (*free_memslot)(struct kvm_memory_slot *free,
 284                              struct kvm_memory_slot *dont);
 285         int (*create_memslot)(struct kvm_memory_slot *slot,
 286                               unsigned long npages);
 287         int (*init_vm)(struct kvm *kvm);
 288         void (*destroy_vm)(struct kvm *kvm);
 289         int (*get_smmu_info)(struct kvm *kvm, struct kvm_ppc_smmu_info *info);
 290         int (*emulate_op)(struct kvm_run *run, struct kvm_vcpu *vcpu,
 291                           unsigned int inst, int *advance);
 292         int (*emulate_mtspr)(struct kvm_vcpu *vcpu, int sprn, ulong spr_val);
 293         int (*emulate_mfspr)(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val);
 294         void (*fast_vcpu_kick)(struct kvm_vcpu *vcpu);
 295         long (*arch_vm_ioctl)(struct file *filp, unsigned int ioctl,
 296                               unsigned long arg);
 297         int (*hcall_implemented)(unsigned long hcall);
 298         int (*irq_bypass_add_producer)(struct irq_bypass_consumer *,
 299                                        struct irq_bypass_producer *);
 300         void (*irq_bypass_del_producer)(struct irq_bypass_consumer *,
 301                                         struct irq_bypass_producer *);
 302         int (*configure_mmu)(struct kvm *kvm, struct kvm_ppc_mmuv3_cfg *cfg);
 303         int (*get_rmmu_info)(struct kvm *kvm, struct kvm_ppc_rmmu_info *info);
 304 };
 305
 306 extern struct kvmppc_ops *kvmppc_hv_ops;
 307 extern struct kvmppc_ops *kvmppc_pr_ops;
 308
 309 static inline int kvmppc_get_last_inst(struct kvm_vcpu *vcpu,
 310                                         enum instruction_type type, u32 *inst)
 311 {
 312         int ret = EMULATE_DONE;
 313         u32 fetched_inst;
 314
 315         /* Load the instruction manually if it failed to do so in the
 316          * exit path */
 317         if (vcpu->arch.last_inst == KVM_INST_FETCH_FAILED)
 318                 ret = kvmppc_load_last_inst(vcpu, type, &vcpu->arch.last_inst);
 319
 320         /*  Write fetch_failed unswapped if the fetch failed */
 321         if (ret == EMULATE_DONE)
 322                 fetched_inst = kvmppc_need_byteswap(vcpu) ?
 323                                 swab32(vcpu->arch.last_inst) :
 324                                 vcpu->arch.last_inst;
 325         else
 326                 fetched_inst = vcpu->arch.last_inst;
 327
 328         *inst = fetched_inst;
 329         return ret;
 330 }
 331
 332 static inline bool is_kvmppc_hv_enabled(struct kvm *kvm)
 333 {
 334         return kvm->arch.kvm_ops == kvmppc_hv_ops;
 335 }
 336
 337 extern int kvmppc_hwrng_present(void);
 338
 339 /*
 340  * Cuts out inst bits with ordering according to spec.
 341  * That means the leftmost bit is zero. All given bits are included.
 342  */
 343 static inline u32 kvmppc_get_field(u64 inst, int msb, int lsb)
 344 {
 345         u32 r;
 346         u32 mask;
 347
 348         BUG_ON(msb > lsb);
 349
 350         mask = (1 << (lsb - msb + 1)) - 1;
 351         r = (inst >> (63 - lsb)) & mask;
 352
 353         return r;
 354 }
 355
 356 /*
 357  * Replaces inst bits with ordering according to spec.
 358  */
 359 static inline u32 kvmppc_set_field(u64 inst, int msb, int lsb, int value)
 360 {
 361         u32 r;
 362         u32 mask;
 363
 364         BUG_ON(msb > lsb);
 365
 366         mask = ((1 << (lsb - msb + 1)) - 1) << (63 - lsb);
 367         r = (inst & ~mask) | ((value << (63 - lsb)) & mask);
 368
 369         return r;
 370 }
 371
 372 #define one_reg_size(id)        \
 373         (1ul << (((id) & KVM_REG_SIZE_MASK) >> KVM_REG_SIZE_SHIFT))
 374
 375 #define get_reg_val(id, reg)    ({              \
 376         union kvmppc_one_reg __u;               \
 377         switch (one_reg_size(id)) {             \
 378         case 4: __u.wval = (reg); break;        \
 379         case 8: __u.dval = (reg); break;        \
 380         default: BUG();                         \
 381         }                                       \
 382         __u;                                    \
 383 })
 384
 385
 386 #define set_reg_val(id, val)    ({              \
 387         u64 __v;                                \
 388         switch (one_reg_size(id)) {             \
 389         case 4: __v = (val).wval; break;        \
 390         case 8: __v = (val).dval; break;        \
 391         default: BUG();                         \
 392         }                                       \
 393         __v;                                    \
 394 })
 395
 396 int kvmppc_core_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
 397 int kvmppc_core_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
 398
 399 int kvmppc_get_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
 400 int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
 401
 402 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg);
 403 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg);
 404 int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id, union kvmppc_one_reg *);
 405 int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id, union kvmppc_one_reg *);
 406
 407 void kvmppc_set_pid(struct kvm_vcpu *vcpu, u32 pid);
 408
 409 struct openpic;
 410
 411 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 412 extern void kvm_cma_reserve(void) __init;
 413 static inline void kvmppc_set_xics_phys(int cpu, unsigned long addr)
 414 {
 415         paca[cpu].kvm_hstate.xics_phys = addr;
 416 }
 417
 418 static inline u32 kvmppc_get_xics_latch(void)
 419 {
 420         u32 xirr;
 421
 422         xirr = get_paca()->kvm_hstate.saved_xirr;
 423         get_paca()->kvm_hstate.saved_xirr = 0;
 424         return xirr;
 425 }
 426
 427 static inline void kvmppc_set_host_ipi(int cpu, u8 host_ipi)
 428 {
 429         paca[cpu].kvm_hstate.host_ipi = host_ipi;
 430 }
 431
 432 static inline void kvmppc_fast_vcpu_kick(struct kvm_vcpu *vcpu)
 433 {
 434         vcpu->kvm->arch.kvm_ops->fast_vcpu_kick(vcpu);
 435 }
 436
 437 extern void kvm_hv_vm_activated(void);
 438 extern void kvm_hv_vm_deactivated(void);
 439 extern bool kvm_hv_mode_active(void);
 440
 441 #else
 442 static inline void __init kvm_cma_reserve(void)
 443 {}
 444
 445 static inline void kvmppc_set_xics_phys(int cpu, unsigned long addr)
 446 {}
 447
 448 static inline u32 kvmppc_get_xics_latch(void)
 449 {
 450         return 0;
 451 }
 452
 453 static inline void kvmppc_set_host_ipi(int cpu, u8 host_ipi)
 454 {}
 455
 456 static inline void kvmppc_fast_vcpu_kick(struct kvm_vcpu *vcpu)
 457 {
 458         kvm_vcpu_kick(vcpu);
 459 }
 460
 461 static inline bool kvm_hv_mode_active(void)             { return false; }
 462
 463 #endif
 464
 465 #ifdef CONFIG_KVM_XICS
 466 static inline int kvmppc_xics_enabled(struct kvm_vcpu *vcpu)
 467 {
 468         return vcpu->arch.irq_type == KVMPPC_IRQ_XICS;
 469 }
 470
 471 static inline struct kvmppc_passthru_irqmap *kvmppc_get_passthru_irqmap(
 472                                 struct kvm *kvm)
 473 {
 474         if (kvm && kvm_irq_bypass)
 475                 return kvm->arch.pimap;
 476         return NULL;
 477 }
 478
 479 extern void kvmppc_alloc_host_rm_ops(void);
 480 extern void kvmppc_free_host_rm_ops(void);
 481 extern void kvmppc_free_pimap(struct kvm *kvm);
 482 extern int kvmppc_xics_rm_complete(struct kvm_vcpu *vcpu, u32 hcall);
 483 extern void kvmppc_xics_free_icp(struct kvm_vcpu *vcpu);
 484 extern int kvmppc_xics_create_icp(struct kvm_vcpu *vcpu, unsigned long server);
 485 extern int kvm_vm_ioctl_xics_irq(struct kvm *kvm, struct kvm_irq_level *args);
 486 extern int kvmppc_xics_hcall(struct kvm_vcpu *vcpu, u32 cmd);
 487 extern u64 kvmppc_xics_get_icp(struct kvm_vcpu *vcpu);
 488 extern int kvmppc_xics_set_icp(struct kvm_vcpu *vcpu, u64 icpval);
 489 extern int kvmppc_xics_connect_vcpu(struct kvm_device *dev,
 490                         struct kvm_vcpu *vcpu, u32 cpu);
 491 extern void kvmppc_xics_ipi_action(void);
 492 extern void kvmppc_xics_set_mapped(struct kvm *kvm, unsigned long guest_irq,
 493                                    unsigned long host_irq);
 494 extern void kvmppc_xics_clr_mapped(struct kvm *kvm, unsigned long guest_irq,
 495                                    unsigned long host_irq);
 496 extern long kvmppc_deliver_irq_passthru(struct kvm_vcpu *vcpu, __be32 xirr,
 497                                         struct kvmppc_irq_map *irq_map,
 498                                         struct kvmppc_passthru_irqmap *pimap,
 499                                         bool *again);
 500 extern int h_ipi_redirect;
 501 #else
 502 static inline struct kvmppc_passthru_irqmap *kvmppc_get_passthru_irqmap(
 503                                 struct kvm *kvm)
 504         { return NULL; }
 505 static inline void kvmppc_alloc_host_rm_ops(void) {};
 506 static inline void kvmppc_free_host_rm_ops(void) {};
 507 static inline void kvmppc_free_pimap(struct kvm *kvm) {};
 508 static inline int kvmppc_xics_rm_complete(struct kvm_vcpu *vcpu, u32 hcall)
 509         { return 0; }
 510 static inline int kvmppc_xics_enabled(struct kvm_vcpu *vcpu)
 511         { return 0; }
 512 static inline void kvmppc_xics_free_icp(struct kvm_vcpu *vcpu) { }
 513 static inline int kvmppc_xics_create_icp(struct kvm_vcpu *vcpu,
 514                                          unsigned long server)
 515         { return -EINVAL; }
 516 static inline int kvm_vm_ioctl_xics_irq(struct kvm *kvm,
 517                                         struct kvm_irq_level *args)
 518         { return -ENOTTY; }
 519 static inline int kvmppc_xics_hcall(struct kvm_vcpu *vcpu, u32 cmd)
 520         { return 0; }
 521 #endif
 522
 523 /*
 524  * Prototypes for functions called only from assembler code.
 525  * Having prototypes reduces sparse errors.
 526  */
 527 long kvmppc_rm_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
 528                          unsigned long ioba, unsigned long tce);
 529 long kvmppc_rm_h_put_tce_indirect(struct kvm_vcpu *vcpu,
 530                                   unsigned long liobn, unsigned long ioba,
 531                                   unsigned long tce_list, unsigned long npages);
 532 long kvmppc_rm_h_stuff_tce(struct kvm_vcpu *vcpu,
 533                            unsigned long liobn, unsigned long ioba,
 534                            unsigned long tce_value, unsigned long npages);
 535 long int kvmppc_rm_h_confer(struct kvm_vcpu *vcpu, int target,
 536                             unsigned int yield_count);
 537 long kvmppc_h_random(struct kvm_vcpu *vcpu);
 538 void kvmhv_commence_exit(int trap);
 539 long kvmppc_realmode_machine_check(struct kvm_vcpu *vcpu);
 540 void kvmppc_subcore_enter_guest(void);
 541 void kvmppc_subcore_exit_guest(void);
 542 long kvmppc_realmode_hmi_handler(void);
 543 long kvmppc_h_enter(struct kvm_vcpu *vcpu, unsigned long flags,
 544                     long pte_index, unsigned long pteh, unsigned long ptel);
 545 long kvmppc_h_remove(struct kvm_vcpu *vcpu, unsigned long flags,
 546                      unsigned long pte_index, unsigned long avpn);
 547 long kvmppc_h_bulk_remove(struct kvm_vcpu *vcpu);
 548 long kvmppc_h_protect(struct kvm_vcpu *vcpu, unsigned long flags,
 549                       unsigned long pte_index, unsigned long avpn,
 550                       unsigned long va);
 551 long kvmppc_h_read(struct kvm_vcpu *vcpu, unsigned long flags,
 552                    unsigned long pte_index);
 553 long kvmppc_h_clear_ref(struct kvm_vcpu *vcpu, unsigned long flags,
 554                         unsigned long pte_index);
 555 long kvmppc_h_clear_mod(struct kvm_vcpu *vcpu, unsigned long flags,
 556                         unsigned long pte_index);
 557 long kvmppc_hpte_hv_fault(struct kvm_vcpu *vcpu, unsigned long addr,
 558                           unsigned long slb_v, unsigned int status, bool data);
 559 unsigned long kvmppc_rm_h_xirr(struct kvm_vcpu *vcpu);
 560 int kvmppc_rm_h_ipi(struct kvm_vcpu *vcpu, unsigned long server,
 561                     unsigned long mfrr);
 562 int kvmppc_rm_h_cppr(struct kvm_vcpu *vcpu, unsigned long cppr);
 563 int kvmppc_rm_h_eoi(struct kvm_vcpu *vcpu, unsigned long xirr);
 564
 565 /*
 566  * Host-side operations we want to set up while running in real
 567  * mode in the guest operating on the xics.
 568  * Currently only VCPU wakeup is supported.
 569  */
 570
 571 union kvmppc_rm_state {
 572         unsigned long raw;
 573         struct {
 574                 u32 in_host;
 575                 u32 rm_action;
 576         };
 577 };
 578
 579 struct kvmppc_host_rm_core {
 580         union kvmppc_rm_state rm_state;
 581         void *rm_data;
 582         char pad[112];
 583 };
 584
 585 struct kvmppc_host_rm_ops {
 586         struct kvmppc_host_rm_core      *rm_core;
 587         void            (*vcpu_kick)(struct kvm_vcpu *vcpu);
 588 };
 589
 590 extern struct kvmppc_host_rm_ops *kvmppc_host_rm_ops_hv;
 591
 592 static inline unsigned long kvmppc_get_epr(struct kvm_vcpu *vcpu)
 593 {
 594 #ifdef CONFIG_KVM_BOOKE_HV
 595         return mfspr(SPRN_GEPR);
 596 #elif defined(CONFIG_BOOKE)
 597         return vcpu->arch.epr;
 598 #else
 599         return 0;
 600 #endif
 601 }
 602
 603 static inline void kvmppc_set_epr(struct kvm_vcpu *vcpu, u32 epr)
 604 {
 605 #ifdef CONFIG_KVM_BOOKE_HV
 606         mtspr(SPRN_GEPR, epr);
 607 #elif defined(CONFIG_BOOKE)
 608         vcpu->arch.epr = epr;
 609 #endif
 610 }
 611
 612 #ifdef CONFIG_KVM_MPIC
 613
 614 void kvmppc_mpic_set_epr(struct kvm_vcpu *vcpu);
 615 int kvmppc_mpic_connect_vcpu(struct kvm_device *dev, struct kvm_vcpu *vcpu,
 616                              u32 cpu);
 617 void kvmppc_mpic_disconnect_vcpu(struct openpic *opp, struct kvm_vcpu *vcpu);
 618
 619 #else
 620
 621 static inline void kvmppc_mpic_set_epr(struct kvm_vcpu *vcpu)
 622 {
 623 }
 624
 625 static inline int kvmppc_mpic_connect_vcpu(struct kvm_device *dev,
 626                 struct kvm_vcpu *vcpu, u32 cpu)
 627 {
 628         return -EINVAL;
 629 }
 630
 631 static inline void kvmppc_mpic_disconnect_vcpu(struct openpic *opp,
 632                 struct kvm_vcpu *vcpu)
 633 {
 634 }
 635
 636 #endif /* CONFIG_KVM_MPIC */
 637
 638 int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu,
 639                               struct kvm_config_tlb *cfg);
 640 int kvm_vcpu_ioctl_dirty_tlb(struct kvm_vcpu *vcpu,
 641                              struct kvm_dirty_tlb *cfg);
 642
 643 long kvmppc_alloc_lpid(void);
 644 void kvmppc_claim_lpid(long lpid);
 645 void kvmppc_free_lpid(long lpid);
 646 void kvmppc_init_lpid(unsigned long nr_lpids);
 647
 648 static inline void kvmppc_mmu_flush_icache(kvm_pfn_t pfn)
 649 {
 650         struct page *page;
 651         /*
 652          * We can only access pages that the kernel maps
 653          * as memory. Bail out for unmapped ones.
 654          */
 655         if (!pfn_valid(pfn))
 656                 return;
 657
 658         /* Clear i-cache for new pages */
 659         page = pfn_to_page(pfn);
 660         if (!test_bit(PG_arch_1, &page->flags)) {
 661                 flush_dcache_icache_page(page);
 662                 set_bit(PG_arch_1, &page->flags);
 663         }
 664 }
 665
 666 /*
 667  * Shared struct helpers. The shared struct can be little or big endian,
 668  * depending on the guest endianness. So expose helpers to all of them.
 669  */
 670 static inline bool kvmppc_shared_big_endian(struct kvm_vcpu *vcpu)
 671 {
 672 #if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
 673         /* Only Book3S_64 PR supports bi-endian for now */
 674         return vcpu->arch.shared_big_endian;
 675 #elif defined(CONFIG_PPC_BOOK3S_64) && defined(__LITTLE_ENDIAN__)
 676         /* Book3s_64 HV on little endian is always little endian */
 677         return false;
 678 #else
 679         return true;
 680 #endif
 681 }
 682
 683 #define SPRNG_WRAPPER_GET(reg, bookehv_spr)                             \
 684 static inline ulong kvmppc_get_##reg(struct kvm_vcpu *vcpu)             \
 685 {                                                                       \
 686         return mfspr(bookehv_spr);                                      \
 687 }                                                                       \
 688
 689 #define SPRNG_WRAPPER_SET(reg, bookehv_spr)                             \
 690 static inline void kvmppc_set_##reg(struct kvm_vcpu *vcpu, ulong val)   \
 691 {                                                                       \
 692         mtspr(bookehv_spr, val);                                                \
 693 }                                                                       \
 694
 695 #define SHARED_WRAPPER_GET(reg, size)                                   \
 696 static inline u##size kvmppc_get_##reg(struct kvm_vcpu *vcpu)           \
 697 {                                                                       \
 698         if (kvmppc_shared_big_endian(vcpu))                             \
 699                return be##size##_to_cpu(vcpu->arch.shared->reg);        \
 700         else                                                            \
 701                return le##size##_to_cpu(vcpu->arch.shared->reg);        \
 702 }                                                                       \
 703
 704 #define SHARED_WRAPPER_SET(reg, size)                                   \
 705 static inline void kvmppc_set_##reg(struct kvm_vcpu *vcpu, u##size val) \
 706 {                                                                       \
 707         if (kvmppc_shared_big_endian(vcpu))                             \
 708                vcpu->arch.shared->reg = cpu_to_be##size(val);           \
 709         else                                                            \
 710                vcpu->arch.shared->reg = cpu_to_le##size(val);           \
 711 }                                                                       \
 712
 713 #define SHARED_WRAPPER(reg, size)                                       \
 714         SHARED_WRAPPER_GET(reg, size)                                   \
 715         SHARED_WRAPPER_SET(reg, size)                                   \
 716
 717 #define SPRNG_WRAPPER(reg, bookehv_spr)                                 \
 718         SPRNG_WRAPPER_GET(reg, bookehv_spr)                             \
 719         SPRNG_WRAPPER_SET(reg, bookehv_spr)                             \
 720
 721 #ifdef CONFIG_KVM_BOOKE_HV
 722
 723 #define SHARED_SPRNG_WRAPPER(reg, size, bookehv_spr)                    \
 724         SPRNG_WRAPPER(reg, bookehv_spr)                                 \
 725
 726 #else
 727
 728 #define SHARED_SPRNG_WRAPPER(reg, size, bookehv_spr)                    \
 729         SHARED_WRAPPER(reg, size)                                       \
 730
 731 #endif
 732
 733 SHARED_WRAPPER(critical, 64)
 734 SHARED_SPRNG_WRAPPER(sprg0, 64, SPRN_GSPRG0)
 735 SHARED_SPRNG_WRAPPER(sprg1, 64, SPRN_GSPRG1)
 736 SHARED_SPRNG_WRAPPER(sprg2, 64, SPRN_GSPRG2)
 737 SHARED_SPRNG_WRAPPER(sprg3, 64, SPRN_GSPRG3)
 738 SHARED_SPRNG_WRAPPER(srr0, 64, SPRN_GSRR0)
 739 SHARED_SPRNG_WRAPPER(srr1, 64, SPRN_GSRR1)
 740 SHARED_SPRNG_WRAPPER(dar, 64, SPRN_GDEAR)
 741 SHARED_SPRNG_WRAPPER(esr, 64, SPRN_GESR)
 742 SHARED_WRAPPER_GET(msr, 64)
 743 static inline void kvmppc_set_msr_fast(struct kvm_vcpu *vcpu, u64 val)
 744 {
 745         if (kvmppc_shared_big_endian(vcpu))
 746                vcpu->arch.shared->msr = cpu_to_be64(val);
 747         else
 748                vcpu->arch.shared->msr = cpu_to_le64(val);
 749 }
 750 SHARED_WRAPPER(dsisr, 32)
 751 SHARED_WRAPPER(int_pending, 32)
 752 SHARED_WRAPPER(sprg4, 64)
 753 SHARED_WRAPPER(sprg5, 64)
 754 SHARED_WRAPPER(sprg6, 64)
 755 SHARED_WRAPPER(sprg7, 64)
 756
 757 static inline u32 kvmppc_get_sr(struct kvm_vcpu *vcpu, int nr)
 758 {
 759         if (kvmppc_shared_big_endian(vcpu))
 760                return be32_to_cpu(vcpu->arch.shared->sr[nr]);
 761         else
 762                return le32_to_cpu(vcpu->arch.shared->sr[nr]);
 763 }
 764
 765 static inline void kvmppc_set_sr(struct kvm_vcpu *vcpu, int nr, u32 val)
 766 {
 767         if (kvmppc_shared_big_endian(vcpu))
 768                vcpu->arch.shared->sr[nr] = cpu_to_be32(val);
 769         else
 770                vcpu->arch.shared->sr[nr] = cpu_to_le32(val);
 771 }
 772
 773 /*
 774  * Please call after prepare_to_enter. This function puts the lazy ee and irq
 775  * disabled tracking state back to normal mode, without actually enabling
 776  * interrupts.
 777  */
 778 static inline void kvmppc_fix_ee_before_entry(void)
 779 {
 780         trace_hardirqs_on();
 781
 782 #ifdef CONFIG_PPC64
 783         /*
 784          * To avoid races, the caller must have gone directly from having
 785          * interrupts fully-enabled to hard-disabled.
 786          */
 787         WARN_ON(local_paca->irq_happened != PACA_IRQ_HARD_DIS);
 788
 789         /* Only need to enable IRQs by hard enabling them after this */
 790         local_paca->irq_happened = 0;
 791         local_paca->soft_enabled = 1;
 792 #endif
 793 }
 794
 795 static inline ulong kvmppc_get_ea_indexed(struct kvm_vcpu *vcpu, int ra, int rb)
 796 {
 797         ulong ea;
 798         ulong msr_64bit = 0;
 799
 800         ea = kvmppc_get_gpr(vcpu, rb);
 801         if (ra)
 802                 ea += kvmppc_get_gpr(vcpu, ra);
 803
 804 #if defined(CONFIG_PPC_BOOK3E_64)
 805         msr_64bit = MSR_CM;
 806 #elif defined(CONFIG_PPC_BOOK3S_64)
 807         msr_64bit = MSR_SF;
 808 #endif
 809
 810         if (!(kvmppc_get_msr(vcpu) & msr_64bit))
 811                 ea = (uint32_t)ea;
 812
 813         return ea;
 814 }
 815
 816 extern void xics_wake_cpu(int cpu);
 817
 818 #endif /* __POWERPC_KVM_PPC_H__ */