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 enum emulation_result {
  42         EMULATE_DONE,         /* no further processing */
  43         EMULATE_DO_MMIO,      /* kvm_run filled with MMIO request */
  44         EMULATE_DO_DCR,       /* kvm_run filled with DCR request */
  45         EMULATE_FAIL,         /* can't emulate this instruction */
  46         EMULATE_AGAIN,        /* something went wrong. go again */
  47         EMULATE_EXIT_USER,    /* emulation requires exit to user-space */
  48 };
  49
  50 extern int kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu);
  51 extern int __kvmppc_vcpu_run(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu);
  52 extern void kvmppc_handler_highmem(void);
  53
  54 extern void kvmppc_dump_vcpu(struct kvm_vcpu *vcpu);
  55 extern int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
  56                               unsigned int rt, unsigned int bytes,
  57                               int is_bigendian);
  58 extern int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
  59                                unsigned int rt, unsigned int bytes,
  60                                int is_bigendian);
  61 extern int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
  62                                u64 val, unsigned int bytes, int is_bigendian);
  63
  64 extern int kvmppc_emulate_instruction(struct kvm_run *run,
  65                                       struct kvm_vcpu *vcpu);
  66 extern int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu);
  67 extern void kvmppc_emulate_dec(struct kvm_vcpu *vcpu);
  68 extern u32 kvmppc_get_dec(struct kvm_vcpu *vcpu, u64 tb);
  69 extern void kvmppc_decrementer_func(unsigned long data);
  70 extern int kvmppc_sanity_check(struct kvm_vcpu *vcpu);
  71 extern int kvmppc_subarch_vcpu_init(struct kvm_vcpu *vcpu);
  72 extern void kvmppc_subarch_vcpu_uninit(struct kvm_vcpu *vcpu);
  73
  74 /* Core-specific hooks */
  75
  76 extern void kvmppc_mmu_map(struct kvm_vcpu *vcpu, u64 gvaddr, gpa_t gpaddr,
  77                            unsigned int gtlb_idx);
  78 extern void kvmppc_mmu_priv_switch(struct kvm_vcpu *vcpu, int usermode);
  79 extern void kvmppc_mmu_switch_pid(struct kvm_vcpu *vcpu, u32 pid);
  80 extern void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu);
  81 extern int kvmppc_mmu_init(struct kvm_vcpu *vcpu);
  82 extern int kvmppc_mmu_dtlb_index(struct kvm_vcpu *vcpu, gva_t eaddr);
  83 extern int kvmppc_mmu_itlb_index(struct kvm_vcpu *vcpu, gva_t eaddr);
  84 extern gpa_t kvmppc_mmu_xlate(struct kvm_vcpu *vcpu, unsigned int gtlb_index,
  85                               gva_t eaddr);
  86 extern void kvmppc_mmu_dtlb_miss(struct kvm_vcpu *vcpu);
  87 extern void kvmppc_mmu_itlb_miss(struct kvm_vcpu *vcpu);
  88
  89 extern struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm,
  90                                                 unsigned int id);
  91 extern void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu);
  92 extern int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu);
  93 extern int kvmppc_core_check_processor_compat(void);
  94 extern int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu,
  95                                       struct kvm_translation *tr);
  96
  97 extern void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
  98 extern void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu);
  99
 100 extern int kvmppc_core_prepare_to_enter(struct kvm_vcpu *vcpu);
 101 extern int kvmppc_core_pending_dec(struct kvm_vcpu *vcpu);
 102 extern void kvmppc_core_queue_program(struct kvm_vcpu *vcpu, ulong flags);
 103 extern void kvmppc_core_queue_dec(struct kvm_vcpu *vcpu);
 104 extern void kvmppc_core_dequeue_dec(struct kvm_vcpu *vcpu);
 105 extern void kvmppc_core_queue_external(struct kvm_vcpu *vcpu,
 106                                        struct kvm_interrupt *irq);
 107 extern void kvmppc_core_dequeue_external(struct kvm_vcpu *vcpu);
 108 extern void kvmppc_core_flush_tlb(struct kvm_vcpu *vcpu);
 109
 110 extern int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
 111                                   unsigned int op, int *advance);
 112 extern int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn,
 113                                      ulong val);
 114 extern int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn,
 115                                      ulong *val);
 116 extern int kvmppc_core_check_requests(struct kvm_vcpu *vcpu);
 117
 118 extern int kvmppc_booke_init(void);
 119 extern void kvmppc_booke_exit(void);
 120
 121 extern void kvmppc_core_destroy_mmu(struct kvm_vcpu *vcpu);
 122 extern int kvmppc_kvm_pv(struct kvm_vcpu *vcpu);
 123 extern void kvmppc_map_magic(struct kvm_vcpu *vcpu);
 124
 125 extern long kvmppc_alloc_hpt(struct kvm *kvm, u32 *htab_orderp);
 126 extern long kvmppc_alloc_reset_hpt(struct kvm *kvm, u32 *htab_orderp);
 127 extern void kvmppc_free_hpt(struct kvm *kvm);
 128 extern long kvmppc_prepare_vrma(struct kvm *kvm,
 129                                 struct kvm_userspace_memory_region *mem);
 130 extern void kvmppc_map_vrma(struct kvm_vcpu *vcpu,
 131                         struct kvm_memory_slot *memslot, unsigned long porder);
 132 extern int kvmppc_pseries_do_hcall(struct kvm_vcpu *vcpu);
 133
 134 extern long kvm_vm_ioctl_create_spapr_tce(struct kvm *kvm,
 135                                 struct kvm_create_spapr_tce *args);
 136 extern long kvmppc_h_put_tce(struct kvm_vcpu *vcpu, unsigned long liobn,
 137                              unsigned long ioba, unsigned long tce);
 138 extern long kvm_vm_ioctl_allocate_rma(struct kvm *kvm,
 139                                 struct kvm_allocate_rma *rma);
 140 extern struct kvm_rma_info *kvm_alloc_rma(void);
 141 extern void kvm_release_rma(struct kvm_rma_info *ri);
 142 extern struct page *kvm_alloc_hpt(unsigned long nr_pages);
 143 extern void kvm_release_hpt(struct page *page, unsigned long nr_pages);
 144 extern int kvmppc_core_init_vm(struct kvm *kvm);
 145 extern void kvmppc_core_destroy_vm(struct kvm *kvm);
 146 extern void kvmppc_core_free_memslot(struct kvm_memory_slot *free,
 147                                      struct kvm_memory_slot *dont);
 148 extern int kvmppc_core_create_memslot(struct kvm_memory_slot *slot,
 149                                       unsigned long npages);
 150 extern int kvmppc_core_prepare_memory_region(struct kvm *kvm,
 151                                 struct kvm_memory_slot *memslot,
 152                                 struct kvm_userspace_memory_region *mem);
 153 extern void kvmppc_core_commit_memory_region(struct kvm *kvm,
 154                                 struct kvm_userspace_memory_region *mem,
 155                                 const struct kvm_memory_slot *old);
 156 extern int kvm_vm_ioctl_get_smmu_info(struct kvm *kvm,
 157                                       struct kvm_ppc_smmu_info *info);
 158 extern void kvmppc_core_flush_memslot(struct kvm *kvm,
 159                                       struct kvm_memory_slot *memslot);
 160
 161 extern int kvmppc_bookehv_init(void);
 162 extern void kvmppc_bookehv_exit(void);
 163
 164 extern int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu);
 165
 166 extern int kvm_vm_ioctl_get_htab_fd(struct kvm *kvm, struct kvm_get_htab_fd *);
 167
 168 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq);
 169
 170 extern int kvm_vm_ioctl_rtas_define_token(struct kvm *kvm, void __user *argp);
 171 extern int kvmppc_rtas_hcall(struct kvm_vcpu *vcpu);
 172 extern void kvmppc_rtas_tokens_free(struct kvm *kvm);
 173 extern int kvmppc_xics_set_xive(struct kvm *kvm, u32 irq, u32 server,
 174                                 u32 priority);
 175 extern int kvmppc_xics_get_xive(struct kvm *kvm, u32 irq, u32 *server,
 176                                 u32 *priority);
 177 extern int kvmppc_xics_int_on(struct kvm *kvm, u32 irq);
 178 extern int kvmppc_xics_int_off(struct kvm *kvm, u32 irq);
 179
 180 /*
 181  * Cuts out inst bits with ordering according to spec.
 182  * That means the leftmost bit is zero. All given bits are included.
 183  */
 184 static inline u32 kvmppc_get_field(u64 inst, int msb, int lsb)
 185 {
 186         u32 r;
 187         u32 mask;
 188
 189         BUG_ON(msb > lsb);
 190
 191         mask = (1 << (lsb - msb + 1)) - 1;
 192         r = (inst >> (63 - lsb)) & mask;
 193
 194         return r;
 195 }
 196
 197 /*
 198  * Replaces inst bits with ordering according to spec.
 199  */
 200 static inline u32 kvmppc_set_field(u64 inst, int msb, int lsb, int value)
 201 {
 202         u32 r;
 203         u32 mask;
 204
 205         BUG_ON(msb > lsb);
 206
 207         mask = ((1 << (lsb - msb + 1)) - 1) << (63 - lsb);
 208         r = (inst & ~mask) | ((value << (63 - lsb)) & mask);
 209
 210         return r;
 211 }
 212
 213 union kvmppc_one_reg {
 214         u32     wval;
 215         u64     dval;
 216         vector128 vval;
 217         u64     vsxval[2];
 218         struct {
 219                 u64     addr;
 220                 u64     length;
 221         }       vpaval;
 222 };
 223
 224 #define one_reg_size(id)        \
 225         (1ul << (((id) & KVM_REG_SIZE_MASK) >> KVM_REG_SIZE_SHIFT))
 226
 227 #define get_reg_val(id, reg)    ({              \
 228         union kvmppc_one_reg __u;               \
 229         switch (one_reg_size(id)) {             \
 230         case 4: __u.wval = (reg); break;        \
 231         case 8: __u.dval = (reg); break;        \
 232         default: BUG();                         \
 233         }                                       \
 234         __u;                                    \
 235 })
 236
 237
 238 #define set_reg_val(id, val)    ({              \
 239         u64 __v;                                \
 240         switch (one_reg_size(id)) {             \
 241         case 4: __v = (val).wval; break;        \
 242         case 8: __v = (val).dval; break;        \
 243         default: BUG();                         \
 244         }                                       \
 245         __v;                                    \
 246 })
 247
 248 void kvmppc_core_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
 249 int kvmppc_core_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
 250
 251 void kvmppc_get_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
 252 int kvmppc_set_sregs_ivor(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
 253
 254 int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg);
 255 int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg);
 256 int kvmppc_get_one_reg(struct kvm_vcpu *vcpu, u64 id, union kvmppc_one_reg *);
 257 int kvmppc_set_one_reg(struct kvm_vcpu *vcpu, u64 id, union kvmppc_one_reg *);
 258
 259 void kvmppc_set_pid(struct kvm_vcpu *vcpu, u32 pid);
 260
 261 struct openpic;
 262
 263 #ifdef CONFIG_KVM_BOOK3S_64_HV
 264 extern void kvm_cma_reserve(void) __init;
 265 static inline void kvmppc_set_xics_phys(int cpu, unsigned long addr)
 266 {
 267         paca[cpu].kvm_hstate.xics_phys = addr;
 268 }
 269
 270 static inline u32 kvmppc_get_xics_latch(void)
 271 {
 272         u32 xirr = get_paca()->kvm_hstate.saved_xirr;
 273
 274         get_paca()->kvm_hstate.saved_xirr = 0;
 275
 276         return xirr;
 277 }
 278
 279 static inline void kvmppc_set_host_ipi(int cpu, u8 host_ipi)
 280 {
 281         paca[cpu].kvm_hstate.host_ipi = host_ipi;
 282 }
 283
 284 extern void kvmppc_fast_vcpu_kick(struct kvm_vcpu *vcpu);
 285
 286 #else
 287 static inline void __init kvm_cma_reserve(void)
 288 {}
 289
 290 static inline void kvmppc_set_xics_phys(int cpu, unsigned long addr)
 291 {}
 292
 293 static inline u32 kvmppc_get_xics_latch(void)
 294 {
 295         return 0;
 296 }
 297
 298 static inline void kvmppc_set_host_ipi(int cpu, u8 host_ipi)
 299 {}
 300
 301 static inline void kvmppc_fast_vcpu_kick(struct kvm_vcpu *vcpu)
 302 {
 303         kvm_vcpu_kick(vcpu);
 304 }
 305 #endif
 306
 307 #ifdef CONFIG_KVM_XICS
 308 static inline int kvmppc_xics_enabled(struct kvm_vcpu *vcpu)
 309 {
 310         return vcpu->arch.irq_type == KVMPPC_IRQ_XICS;
 311 }
 312 extern void kvmppc_xics_free_icp(struct kvm_vcpu *vcpu);
 313 extern int kvmppc_xics_create_icp(struct kvm_vcpu *vcpu, unsigned long server);
 314 extern int kvm_vm_ioctl_xics_irq(struct kvm *kvm, struct kvm_irq_level *args);
 315 extern int kvmppc_xics_hcall(struct kvm_vcpu *vcpu, u32 cmd);
 316 extern u64 kvmppc_xics_get_icp(struct kvm_vcpu *vcpu);
 317 extern int kvmppc_xics_set_icp(struct kvm_vcpu *vcpu, u64 icpval);
 318 extern int kvmppc_xics_connect_vcpu(struct kvm_device *dev,
 319                         struct kvm_vcpu *vcpu, u32 cpu);
 320 #else
 321 static inline int kvmppc_xics_enabled(struct kvm_vcpu *vcpu)
 322         { return 0; }
 323 static inline void kvmppc_xics_free_icp(struct kvm_vcpu *vcpu) { }
 324 static inline int kvmppc_xics_create_icp(struct kvm_vcpu *vcpu,
 325                                          unsigned long server)
 326         { return -EINVAL; }
 327 static inline int kvm_vm_ioctl_xics_irq(struct kvm *kvm,
 328                                         struct kvm_irq_level *args)
 329         { return -ENOTTY; }
 330 static inline int kvmppc_xics_hcall(struct kvm_vcpu *vcpu, u32 cmd)
 331         { return 0; }
 332 #endif
 333
 334 static inline void kvmppc_set_epr(struct kvm_vcpu *vcpu, u32 epr)
 335 {
 336 #ifdef CONFIG_KVM_BOOKE_HV
 337         mtspr(SPRN_GEPR, epr);
 338 #elif defined(CONFIG_BOOKE)
 339         vcpu->arch.epr = epr;
 340 #endif
 341 }
 342
 343 #ifdef CONFIG_KVM_MPIC
 344
 345 void kvmppc_mpic_set_epr(struct kvm_vcpu *vcpu);
 346 int kvmppc_mpic_connect_vcpu(struct kvm_device *dev, struct kvm_vcpu *vcpu,
 347                              u32 cpu);
 348 void kvmppc_mpic_disconnect_vcpu(struct openpic *opp, struct kvm_vcpu *vcpu);
 349
 350 #else
 351
 352 static inline void kvmppc_mpic_set_epr(struct kvm_vcpu *vcpu)
 353 {
 354 }
 355
 356 static inline int kvmppc_mpic_connect_vcpu(struct kvm_device *dev,
 357                 struct kvm_vcpu *vcpu, u32 cpu)
 358 {
 359         return -EINVAL;
 360 }
 361
 362 static inline void kvmppc_mpic_disconnect_vcpu(struct openpic *opp,
 363                 struct kvm_vcpu *vcpu)
 364 {
 365 }
 366
 367 #endif /* CONFIG_KVM_MPIC */
 368
 369 int kvm_vcpu_ioctl_config_tlb(struct kvm_vcpu *vcpu,
 370                               struct kvm_config_tlb *cfg);
 371 int kvm_vcpu_ioctl_dirty_tlb(struct kvm_vcpu *vcpu,
 372                              struct kvm_dirty_tlb *cfg);
 373
 374 long kvmppc_alloc_lpid(void);
 375 void kvmppc_claim_lpid(long lpid);
 376 void kvmppc_free_lpid(long lpid);
 377 void kvmppc_init_lpid(unsigned long nr_lpids);
 378
 379 static inline void kvmppc_mmu_flush_icache(pfn_t pfn)
 380 {
 381         struct page *page;
 382         /*
 383          * We can only access pages that the kernel maps
 384          * as memory. Bail out for unmapped ones.
 385          */
 386         if (!pfn_valid(pfn))
 387                 return;
 388
 389         /* Clear i-cache for new pages */
 390         page = pfn_to_page(pfn);
 391         if (!test_bit(PG_arch_1, &page->flags)) {
 392                 flush_dcache_icache_page(page);
 393                 set_bit(PG_arch_1, &page->flags);
 394         }
 395 }
 396
 397 /*
 398  * Please call after prepare_to_enter. This function puts the lazy ee and irq
 399  * disabled tracking state back to normal mode, without actually enabling
 400  * interrupts.
 401  */
 402 static inline void kvmppc_fix_ee_before_entry(void)
 403 {
 404         trace_hardirqs_on();
 405
 406 #ifdef CONFIG_PPC64
 407         /* Only need to enable IRQs by hard enabling them after this */
 408         local_paca->irq_happened = 0;
 409         local_paca->soft_enabled = 1;
 410 #endif
 411 }
 412
 413 static inline ulong kvmppc_get_ea_indexed(struct kvm_vcpu *vcpu, int ra, int rb)
 414 {
 415         ulong ea;
 416         ulong msr_64bit = 0;
 417
 418         ea = kvmppc_get_gpr(vcpu, rb);
 419         if (ra)
 420                 ea += kvmppc_get_gpr(vcpu, ra);
 421
 422 #if defined(CONFIG_PPC_BOOK3E_64)
 423         msr_64bit = MSR_CM;
 424 #elif defined(CONFIG_PPC_BOOK3S_64)
 425         msr_64bit = MSR_SF;
 426 #endif
 427
 428         if (!(vcpu->arch.shared->msr & msr_64bit))
 429                 ea = (uint32_t)ea;
 430
 431         return ea;
 432 }
 433
 434 extern void xics_wake_cpu(int cpu);
 435
 436 #endif /* __POWERPC_KVM_PPC_H__ */