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