arch/powerpc/include/asm/interrupt.h

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2 #ifndef _ASM_POWERPC_INTERRUPT_H
   3 #define _ASM_POWERPC_INTERRUPT_H
   4
   5 /* BookE/4xx */
   6 #define INTERRUPT_CRITICAL_INPUT  0x100
   7
   8 /* BookE */
   9 #define INTERRUPT_DEBUG           0xd00
  10 #ifdef CONFIG_BOOKE
  11 #define INTERRUPT_PERFMON         0x260
  12 #define INTERRUPT_DOORBELL        0x280
  13 #endif
  14
  15 /* BookS/4xx/8xx */
  16 #define INTERRUPT_MACHINE_CHECK   0x200
  17
  18 /* BookS/8xx */
  19 #define INTERRUPT_SYSTEM_RESET    0x100
  20
  21 /* BookS */
  22 #define INTERRUPT_DATA_SEGMENT    0x380
  23 #define INTERRUPT_INST_SEGMENT    0x480
  24 #define INTERRUPT_TRACE           0xd00
  25 #define INTERRUPT_H_DATA_STORAGE  0xe00
  26 #define INTERRUPT_HMI                   0xe60
  27 #define INTERRUPT_H_FAC_UNAVAIL   0xf80
  28 #ifdef CONFIG_PPC_BOOK3S
  29 #define INTERRUPT_DOORBELL        0xa00
  30 #define INTERRUPT_PERFMON         0xf00
  31 #define INTERRUPT_ALTIVEC_UNAVAIL       0xf20
  32 #endif
  33
  34 /* BookE/BookS/4xx/8xx */
  35 #define INTERRUPT_DATA_STORAGE    0x300
  36 #define INTERRUPT_INST_STORAGE    0x400
  37 #define INTERRUPT_EXTERNAL              0x500
  38 #define INTERRUPT_ALIGNMENT       0x600
  39 #define INTERRUPT_PROGRAM         0x700
  40 #define INTERRUPT_SYSCALL         0xc00
  41 #define INTERRUPT_TRACE                 0xd00
  42
  43 /* BookE/BookS/44x */
  44 #define INTERRUPT_FP_UNAVAIL      0x800
  45
  46 /* BookE/BookS/44x/8xx */
  47 #define INTERRUPT_DECREMENTER     0x900
  48
  49 #ifndef INTERRUPT_PERFMON
  50 #define INTERRUPT_PERFMON         0x0
  51 #endif
  52
  53 /* 8xx */
  54 #define INTERRUPT_SOFT_EMU_8xx          0x1000
  55 #define INTERRUPT_INST_TLB_MISS_8xx     0x1100
  56 #define INTERRUPT_DATA_TLB_MISS_8xx     0x1200
  57 #define INTERRUPT_INST_TLB_ERROR_8xx    0x1300
  58 #define INTERRUPT_DATA_TLB_ERROR_8xx    0x1400
  59 #define INTERRUPT_DATA_BREAKPOINT_8xx   0x1c00
  60 #define INTERRUPT_INST_BREAKPOINT_8xx   0x1d00
  61
  62 /* 603 */
  63 #define INTERRUPT_INST_TLB_MISS_603             0x1000
  64 #define INTERRUPT_DATA_LOAD_TLB_MISS_603        0x1100
  65 #define INTERRUPT_DATA_STORE_TLB_MISS_603       0x1200
  66
  67 #ifndef __ASSEMBLY__
  68
  69 #include <linux/context_tracking.h>
  70 #include <linux/hardirq.h>
  71 #include <asm/cputime.h>
  72 #include <asm/firmware.h>
  73 #include <asm/ftrace.h>
  74 #include <asm/kprobes.h>
  75 #include <asm/runlatch.h>
  76
  77 #ifdef CONFIG_PPC_IRQ_SOFT_MASK_DEBUG
  78 /*
  79  * WARN/BUG is handled with a program interrupt so minimise checks here to
  80  * avoid recursion and maximise the chance of getting the first oops handled.
  81  */
  82 #define INT_SOFT_MASK_BUG_ON(regs, cond)                                \
  83 do {                                                                    \
  84         if ((user_mode(regs) || (TRAP(regs) != INTERRUPT_PROGRAM)))     \
  85                 BUG_ON(cond);                                           \
  86 } while (0)
  87 #else
  88 #define INT_SOFT_MASK_BUG_ON(regs, cond)
  89 #endif
  90
  91 #ifdef CONFIG_PPC_BOOK3S_64
  92 extern char __end_soft_masked[];
  93 bool search_kernel_soft_mask_table(unsigned long addr);
  94 unsigned long search_kernel_restart_table(unsigned long addr);
  95
  96 DECLARE_STATIC_KEY_FALSE(interrupt_exit_not_reentrant);
  97
  98 static inline bool is_implicit_soft_masked(struct pt_regs *regs)
  99 {
 100         if (user_mode(regs))
 101                 return false;
 102
 103         if (regs->nip >= (unsigned long)__end_soft_masked)
 104                 return false;
 105
 106         return search_kernel_soft_mask_table(regs->nip);
 107 }
 108
 109 static inline void srr_regs_clobbered(void)
 110 {
 111         local_paca->srr_valid = 0;
 112         local_paca->hsrr_valid = 0;
 113 }
 114 #else
 115 static inline unsigned long search_kernel_restart_table(unsigned long addr)
 116 {
 117         return 0;
 118 }
 119
 120 static inline bool is_implicit_soft_masked(struct pt_regs *regs)
 121 {
 122         return false;
 123 }
 124
 125 static inline void srr_regs_clobbered(void)
 126 {
 127 }
 128 #endif
 129
 130 static inline void nap_adjust_return(struct pt_regs *regs)
 131 {
 132 #ifdef CONFIG_PPC_970_NAP
 133         if (unlikely(test_thread_local_flags(_TLF_NAPPING))) {
 134                 /* Can avoid a test-and-clear because NMIs do not call this */
 135                 clear_thread_local_flags(_TLF_NAPPING);
 136                 regs_set_return_ip(regs, (unsigned long)power4_idle_nap_return);
 137         }
 138 #endif
 139 }
 140
 141 static inline void booke_restore_dbcr0(void)
 142 {
 143 #ifdef CONFIG_PPC_ADV_DEBUG_REGS
 144         unsigned long dbcr0 = current->thread.debug.dbcr0;
 145
 146         if (IS_ENABLED(CONFIG_PPC32) && unlikely(dbcr0 & DBCR0_IDM)) {
 147                 mtspr(SPRN_DBSR, -1);
 148                 mtspr(SPRN_DBCR0, global_dbcr0[smp_processor_id()]);
 149         }
 150 #endif
 151 }
 152
 153 static inline void interrupt_enter_prepare(struct pt_regs *regs)
 154 {
 155 #ifdef CONFIG_PPC64
 156         irq_soft_mask_set(IRQS_ALL_DISABLED);
 157
 158         /*
 159          * If the interrupt was taken with HARD_DIS clear, then enable MSR[EE].
 160          * Asynchronous interrupts get here with HARD_DIS set (see below), so
 161          * this enables MSR[EE] for synchronous interrupts. IRQs remain
 162          * soft-masked. The interrupt handler may later call
 163          * interrupt_cond_local_irq_enable() to achieve a regular process
 164          * context.
 165          */
 166         if (!(local_paca->irq_happened & PACA_IRQ_HARD_DIS)) {
 167                 INT_SOFT_MASK_BUG_ON(regs, !(regs->msr & MSR_EE));
 168                 __hard_irq_enable();
 169         } else {
 170                 __hard_RI_enable();
 171         }
 172         /* Enable MSR[RI] early, to support kernel SLB and hash faults */
 173 #endif
 174
 175         if (!arch_irq_disabled_regs(regs))
 176                 trace_hardirqs_off();
 177
 178         if (user_mode(regs)) {
 179                 kuap_lock();
 180                 CT_WARN_ON(ct_state() != CONTEXT_USER);
 181                 user_exit_irqoff();
 182
 183                 account_cpu_user_entry();
 184                 account_stolen_time();
 185         } else {
 186                 kuap_save_and_lock(regs);
 187                 /*
 188                  * CT_WARN_ON comes here via program_check_exception,
 189                  * so avoid recursion.
 190                  */
 191                 if (TRAP(regs) != INTERRUPT_PROGRAM)
 192                         CT_WARN_ON(ct_state() != CONTEXT_KERNEL &&
 193                                    ct_state() != CONTEXT_IDLE);
 194                 INT_SOFT_MASK_BUG_ON(regs, is_implicit_soft_masked(regs));
 195                 INT_SOFT_MASK_BUG_ON(regs, arch_irq_disabled_regs(regs) &&
 196                                            search_kernel_restart_table(regs->nip));
 197         }
 198         INT_SOFT_MASK_BUG_ON(regs, !arch_irq_disabled_regs(regs) &&
 199                                    !(regs->msr & MSR_EE));
 200
 201         booke_restore_dbcr0();
 202 }
 203
 204 /*
 205  * Care should be taken to note that interrupt_exit_prepare and
 206  * interrupt_async_exit_prepare do not necessarily return immediately to
 207  * regs context (e.g., if regs is usermode, we don't necessarily return to
 208  * user mode). Other interrupts might be taken between here and return,
 209  * context switch / preemption may occur in the exit path after this, or a
 210  * signal may be delivered, etc.
 211  *
 212  * The real interrupt exit code is platform specific, e.g.,
 213  * interrupt_exit_user_prepare / interrupt_exit_kernel_prepare for 64s.
 214  *
 215  * However interrupt_nmi_exit_prepare does return directly to regs, because
 216  * NMIs do not do "exit work" or replay soft-masked interrupts.
 217  */
 218 static inline void interrupt_exit_prepare(struct pt_regs *regs)
 219 {
 220 }
 221
 222 static inline void interrupt_async_enter_prepare(struct pt_regs *regs)
 223 {
 224 #ifdef CONFIG_PPC64
 225         /* Ensure interrupt_enter_prepare does not enable MSR[EE] */
 226         local_paca->irq_happened |= PACA_IRQ_HARD_DIS;
 227 #endif
 228         interrupt_enter_prepare(regs);
 229 #ifdef CONFIG_PPC_BOOK3S_64
 230         /*
 231          * RI=1 is set by interrupt_enter_prepare, so this thread flags access
 232          * has to come afterward (it can cause SLB faults).
 233          */
 234         if (cpu_has_feature(CPU_FTR_CTRL) &&
 235             !test_thread_local_flags(_TLF_RUNLATCH))
 236                 __ppc64_runlatch_on();
 237 #endif
 238         irq_enter();
 239 }
 240
 241 static inline void interrupt_async_exit_prepare(struct pt_regs *regs)
 242 {
 243         /*
 244          * Adjust at exit so the main handler sees the true NIA. This must
 245          * come before irq_exit() because irq_exit can enable interrupts, and
 246          * if another interrupt is taken before nap_adjust_return has run
 247          * here, then that interrupt would return directly to idle nap return.
 248          */
 249         nap_adjust_return(regs);
 250
 251         irq_exit();
 252         interrupt_exit_prepare(regs);
 253 }
 254
 255 struct interrupt_nmi_state {
 256 #ifdef CONFIG_PPC64
 257         u8 irq_soft_mask;
 258         u8 irq_happened;
 259         u8 ftrace_enabled;
 260         u64 softe;
 261 #endif
 262 };
 263
 264 static inline bool nmi_disables_ftrace(struct pt_regs *regs)
 265 {
 266         /* Allow DEC and PMI to be traced when they are soft-NMI */
 267         if (IS_ENABLED(CONFIG_PPC_BOOK3S_64)) {
 268                 if (TRAP(regs) == INTERRUPT_DECREMENTER)
 269                        return false;
 270                 if (TRAP(regs) == INTERRUPT_PERFMON)
 271                        return false;
 272         }
 273         if (IS_ENABLED(CONFIG_PPC_BOOK3E_64)) {
 274                 if (TRAP(regs) == INTERRUPT_PERFMON)
 275                         return false;
 276         }
 277
 278         return true;
 279 }
 280
 281 static inline void interrupt_nmi_enter_prepare(struct pt_regs *regs, struct interrupt_nmi_state *state)
 282 {
 283 #ifdef CONFIG_PPC64
 284         state->irq_soft_mask = local_paca->irq_soft_mask;
 285         state->irq_happened = local_paca->irq_happened;
 286         state->softe = regs->softe;
 287
 288         /*
 289          * Set IRQS_ALL_DISABLED unconditionally so irqs_disabled() does
 290          * the right thing, and set IRQ_HARD_DIS. We do not want to reconcile
 291          * because that goes through irq tracing which we don't want in NMI.
 292          */
 293         local_paca->irq_soft_mask = IRQS_ALL_DISABLED;
 294         local_paca->irq_happened |= PACA_IRQ_HARD_DIS;
 295
 296         if (!(regs->msr & MSR_EE) || is_implicit_soft_masked(regs)) {
 297                 /*
 298                  * Adjust regs->softe to be soft-masked if it had not been
 299                  * reconcied (e.g., interrupt entry with MSR[EE]=0 but softe
 300                  * not yet set disabled), or if it was in an implicit soft
 301                  * masked state. This makes arch_irq_disabled_regs(regs)
 302                  * behave as expected.
 303                  */
 304                 regs->softe = IRQS_ALL_DISABLED;
 305         }
 306
 307         __hard_RI_enable();
 308
 309         /* Don't do any per-CPU operations until interrupt state is fixed */
 310
 311         if (nmi_disables_ftrace(regs)) {
 312                 state->ftrace_enabled = this_cpu_get_ftrace_enabled();
 313                 this_cpu_set_ftrace_enabled(0);
 314         }
 315 #endif
 316
 317         /* If data relocations are enabled, it's safe to use nmi_enter() */
 318         if (mfmsr() & MSR_DR) {
 319                 nmi_enter();
 320                 return;
 321         }
 322
 323         /*
 324          * But do not use nmi_enter() for pseries hash guest taking a real-mode
 325          * NMI because not everything it touches is within the RMA limit.
 326          */
 327         if (IS_ENABLED(CONFIG_PPC_BOOK3S_64) &&
 328             firmware_has_feature(FW_FEATURE_LPAR) &&
 329             !radix_enabled())
 330                 return;
 331
 332         /*
 333          * Likewise, don't use it if we have some form of instrumentation (like
 334          * KASAN shadow) that is not safe to access in real mode (even on radix)
 335          */
 336         if (IS_ENABLED(CONFIG_KASAN))
 337                 return;
 338
 339         /* Otherwise, it should be safe to call it */
 340         nmi_enter();
 341 }
 342
 343 static inline void interrupt_nmi_exit_prepare(struct pt_regs *regs, struct interrupt_nmi_state *state)
 344 {
 345         if (mfmsr() & MSR_DR) {
 346                 // nmi_exit if relocations are on
 347                 nmi_exit();
 348         } else if (IS_ENABLED(CONFIG_PPC_BOOK3S_64) &&
 349                    firmware_has_feature(FW_FEATURE_LPAR) &&
 350                    !radix_enabled()) {
 351                 // no nmi_exit for a pseries hash guest taking a real mode exception
 352         } else if (IS_ENABLED(CONFIG_KASAN)) {
 353                 // no nmi_exit for KASAN in real mode
 354         } else {
 355                 nmi_exit();
 356         }
 357
 358         /*
 359          * nmi does not call nap_adjust_return because nmi should not create
 360          * new work to do (must use irq_work for that).
 361          */
 362
 363 #ifdef CONFIG_PPC64
 364 #ifdef CONFIG_PPC_BOOK3S
 365         if (arch_irq_disabled_regs(regs)) {
 366                 unsigned long rst = search_kernel_restart_table(regs->nip);
 367                 if (rst)
 368                         regs_set_return_ip(regs, rst);
 369         }
 370 #endif
 371
 372         if (nmi_disables_ftrace(regs))
 373                 this_cpu_set_ftrace_enabled(state->ftrace_enabled);
 374
 375         /* Check we didn't change the pending interrupt mask. */
 376         WARN_ON_ONCE((state->irq_happened | PACA_IRQ_HARD_DIS) != local_paca->irq_happened);
 377         regs->softe = state->softe;
 378         local_paca->irq_happened = state->irq_happened;
 379         local_paca->irq_soft_mask = state->irq_soft_mask;
 380 #endif
 381 }
 382
 383 /*
 384  * Don't use noinstr here like x86, but rather add NOKPROBE_SYMBOL to each
 385  * function definition. The reason for this is the noinstr section is placed
 386  * after the main text section, i.e., very far away from the interrupt entry
 387  * asm. That creates problems with fitting linker stubs when building large
 388  * kernels.
 389  */
 390 #define interrupt_handler __visible noinline notrace __no_kcsan __no_sanitize_address
 391
 392 /**
 393  * DECLARE_INTERRUPT_HANDLER_RAW - Declare raw interrupt handler function
 394  * @func:       Function name of the entry point
 395  * @returns:    Returns a value back to asm caller
 396  */
 397 #define DECLARE_INTERRUPT_HANDLER_RAW(func)                             \
 398         __visible long func(struct pt_regs *regs)
 399
 400 /**
 401  * DEFINE_INTERRUPT_HANDLER_RAW - Define raw interrupt handler function
 402  * @func:       Function name of the entry point
 403  * @returns:    Returns a value back to asm caller
 404  *
 405  * @func is called from ASM entry code.
 406  *
 407  * This is a plain function which does no tracing, reconciling, etc.
 408  * The macro is written so it acts as function definition. Append the
 409  * body with a pair of curly brackets.
 410  *
 411  * raw interrupt handlers must not enable or disable interrupts, or
 412  * schedule, tracing and instrumentation (ftrace, lockdep, etc) would
 413  * not be advisable either, although may be possible in a pinch, the
 414  * trace will look odd at least.
 415  *
 416  * A raw handler may call one of the other interrupt handler functions
 417  * to be converted into that interrupt context without these restrictions.
 418  *
 419  * On PPC64, _RAW handlers may return with fast_interrupt_return.
 420  *
 421  * Specific handlers may have additional restrictions.
 422  */
 423 #define DEFINE_INTERRUPT_HANDLER_RAW(func)                              \
 424 static __always_inline __no_sanitize_address __no_kcsan long            \
 425 ____##func(struct pt_regs *regs);                                       \
 426                                                                         \
 427 interrupt_handler long func(struct pt_regs *regs)                       \
 428 {                                                                       \
 429         long ret;                                                       \
 430                                                                         \
 431         __hard_RI_enable();                                             \
 432                                                                         \
 433         ret = ____##func (regs);                                        \
 434                                                                         \
 435         return ret;                                                     \
 436 }                                                                       \
 437 NOKPROBE_SYMBOL(func);                                                  \
 438                                                                         \
 439 static __always_inline __no_sanitize_address __no_kcsan long            \
 440 ____##func(struct pt_regs *regs)
 441
 442 /**
 443  * DECLARE_INTERRUPT_HANDLER - Declare synchronous interrupt handler function
 444  * @func:       Function name of the entry point
 445  */
 446 #define DECLARE_INTERRUPT_HANDLER(func)                                 \
 447         __visible void func(struct pt_regs *regs)
 448
 449 /**
 450  * DEFINE_INTERRUPT_HANDLER - Define synchronous interrupt handler function
 451  * @func:       Function name of the entry point
 452  *
 453  * @func is called from ASM entry code.
 454  *
 455  * The macro is written so it acts as function definition. Append the
 456  * body with a pair of curly brackets.
 457  */
 458 #define DEFINE_INTERRUPT_HANDLER(func)                                  \
 459 static __always_inline void ____##func(struct pt_regs *regs);           \
 460                                                                         \
 461 interrupt_handler void func(struct pt_regs *regs)                       \
 462 {                                                                       \
 463         interrupt_enter_prepare(regs);                                  \
 464                                                                         \
 465         ____##func (regs);                                              \
 466                                                                         \
 467         interrupt_exit_prepare(regs);                                   \
 468 }                                                                       \
 469 NOKPROBE_SYMBOL(func);                                                  \
 470                                                                         \
 471 static __always_inline void ____##func(struct pt_regs *regs)
 472
 473 /**
 474  * DECLARE_INTERRUPT_HANDLER_RET - Declare synchronous interrupt handler function
 475  * @func:       Function name of the entry point
 476  * @returns:    Returns a value back to asm caller
 477  */
 478 #define DECLARE_INTERRUPT_HANDLER_RET(func)                             \
 479         __visible long func(struct pt_regs *regs)
 480
 481 /**
 482  * DEFINE_INTERRUPT_HANDLER_RET - Define synchronous interrupt handler function
 483  * @func:       Function name of the entry point
 484  * @returns:    Returns a value back to asm caller
 485  *
 486  * @func is called from ASM entry code.
 487  *
 488  * The macro is written so it acts as function definition. Append the
 489  * body with a pair of curly brackets.
 490  */
 491 #define DEFINE_INTERRUPT_HANDLER_RET(func)                              \
 492 static __always_inline long ____##func(struct pt_regs *regs);           \
 493                                                                         \
 494 interrupt_handler long func(struct pt_regs *regs)                       \
 495 {                                                                       \
 496         long ret;                                                       \
 497                                                                         \
 498         interrupt_enter_prepare(regs);                                  \
 499                                                                         \
 500         ret = ____##func (regs);                                        \
 501                                                                         \
 502         interrupt_exit_prepare(regs);                                   \
 503                                                                         \
 504         return ret;                                                     \
 505 }                                                                       \
 506 NOKPROBE_SYMBOL(func);                                                  \
 507                                                                         \
 508 static __always_inline long ____##func(struct pt_regs *regs)
 509
 510 /**
 511  * DECLARE_INTERRUPT_HANDLER_ASYNC - Declare asynchronous interrupt handler function
 512  * @func:       Function name of the entry point
 513  */
 514 #define DECLARE_INTERRUPT_HANDLER_ASYNC(func)                           \
 515         __visible void func(struct pt_regs *regs)
 516
 517 /**
 518  * DEFINE_INTERRUPT_HANDLER_ASYNC - Define asynchronous interrupt handler function
 519  * @func:       Function name of the entry point
 520  *
 521  * @func is called from ASM entry code.
 522  *
 523  * The macro is written so it acts as function definition. Append the
 524  * body with a pair of curly brackets.
 525  */
 526 #define DEFINE_INTERRUPT_HANDLER_ASYNC(func)                            \
 527 static __always_inline void ____##func(struct pt_regs *regs);           \
 528                                                                         \
 529 interrupt_handler void func(struct pt_regs *regs)                       \
 530 {                                                                       \
 531         interrupt_async_enter_prepare(regs);                            \
 532                                                                         \
 533         ____##func (regs);                                              \
 534                                                                         \
 535         interrupt_async_exit_prepare(regs);                             \
 536 }                                                                       \
 537 NOKPROBE_SYMBOL(func);                                                  \
 538                                                                         \
 539 static __always_inline void ____##func(struct pt_regs *regs)
 540
 541 /**
 542  * DECLARE_INTERRUPT_HANDLER_NMI - Declare NMI interrupt handler function
 543  * @func:       Function name of the entry point
 544  * @returns:    Returns a value back to asm caller
 545  */
 546 #define DECLARE_INTERRUPT_HANDLER_NMI(func)                             \
 547         __visible long func(struct pt_regs *regs)
 548
 549 /**
 550  * DEFINE_INTERRUPT_HANDLER_NMI - Define NMI interrupt handler function
 551  * @func:       Function name of the entry point
 552  * @returns:    Returns a value back to asm caller
 553  *
 554  * @func is called from ASM entry code.
 555  *
 556  * The macro is written so it acts as function definition. Append the
 557  * body with a pair of curly brackets.
 558  */
 559 #define DEFINE_INTERRUPT_HANDLER_NMI(func)                              \
 560 static __always_inline __no_sanitize_address __no_kcsan long            \
 561 ____##func(struct pt_regs *regs);                                       \
 562                                                                         \
 563 interrupt_handler long func(struct pt_regs *regs)                       \
 564 {                                                                       \
 565         struct interrupt_nmi_state state;                               \
 566         long ret;                                                       \
 567                                                                         \
 568         interrupt_nmi_enter_prepare(regs, &state);                      \
 569                                                                         \
 570         ret = ____##func (regs);                                        \
 571                                                                         \
 572         interrupt_nmi_exit_prepare(regs, &state);                       \
 573                                                                         \
 574         return ret;                                                     \
 575 }                                                                       \
 576 NOKPROBE_SYMBOL(func);                                                  \
 577                                                                         \
 578 static __always_inline  __no_sanitize_address __no_kcsan long           \
 579 ____##func(struct pt_regs *regs)
 580
 581
 582 /* Interrupt handlers */
 583 /* kernel/traps.c */
 584 DECLARE_INTERRUPT_HANDLER_NMI(system_reset_exception);
 585 #ifdef CONFIG_PPC_BOOK3S_64
 586 DECLARE_INTERRUPT_HANDLER_RAW(machine_check_early_boot);
 587 DECLARE_INTERRUPT_HANDLER_ASYNC(machine_check_exception_async);
 588 #endif
 589 DECLARE_INTERRUPT_HANDLER_NMI(machine_check_exception);
 590 DECLARE_INTERRUPT_HANDLER(SMIException);
 591 DECLARE_INTERRUPT_HANDLER(handle_hmi_exception);
 592 DECLARE_INTERRUPT_HANDLER(unknown_exception);
 593 DECLARE_INTERRUPT_HANDLER_ASYNC(unknown_async_exception);
 594 DECLARE_INTERRUPT_HANDLER_NMI(unknown_nmi_exception);
 595 DECLARE_INTERRUPT_HANDLER(instruction_breakpoint_exception);
 596 DECLARE_INTERRUPT_HANDLER(RunModeException);
 597 DECLARE_INTERRUPT_HANDLER(single_step_exception);
 598 DECLARE_INTERRUPT_HANDLER(program_check_exception);
 599 DECLARE_INTERRUPT_HANDLER(emulation_assist_interrupt);
 600 DECLARE_INTERRUPT_HANDLER(alignment_exception);
 601 DECLARE_INTERRUPT_HANDLER(StackOverflow);
 602 DECLARE_INTERRUPT_HANDLER(stack_overflow_exception);
 603 DECLARE_INTERRUPT_HANDLER(kernel_fp_unavailable_exception);
 604 DECLARE_INTERRUPT_HANDLER(altivec_unavailable_exception);
 605 DECLARE_INTERRUPT_HANDLER(vsx_unavailable_exception);
 606 DECLARE_INTERRUPT_HANDLER(facility_unavailable_exception);
 607 DECLARE_INTERRUPT_HANDLER(fp_unavailable_tm);
 608 DECLARE_INTERRUPT_HANDLER(altivec_unavailable_tm);
 609 DECLARE_INTERRUPT_HANDLER(vsx_unavailable_tm);
 610 DECLARE_INTERRUPT_HANDLER_NMI(performance_monitor_exception_nmi);
 611 DECLARE_INTERRUPT_HANDLER_ASYNC(performance_monitor_exception_async);
 612 DECLARE_INTERRUPT_HANDLER_RAW(performance_monitor_exception);
 613 DECLARE_INTERRUPT_HANDLER(DebugException);
 614 DECLARE_INTERRUPT_HANDLER(altivec_assist_exception);
 615 DECLARE_INTERRUPT_HANDLER(CacheLockingException);
 616 DECLARE_INTERRUPT_HANDLER(SPEFloatingPointException);
 617 DECLARE_INTERRUPT_HANDLER(SPEFloatingPointRoundException);
 618 DECLARE_INTERRUPT_HANDLER_NMI(WatchdogException);
 619 DECLARE_INTERRUPT_HANDLER(kernel_bad_stack);
 620
 621 /* slb.c */
 622 DECLARE_INTERRUPT_HANDLER_RAW(do_slb_fault);
 623 DECLARE_INTERRUPT_HANDLER(do_bad_segment_interrupt);
 624
 625 /* hash_utils.c */
 626 DECLARE_INTERRUPT_HANDLER(do_hash_fault);
 627
 628 /* fault.c */
 629 DECLARE_INTERRUPT_HANDLER(do_page_fault);
 630 DECLARE_INTERRUPT_HANDLER(do_bad_page_fault_segv);
 631
 632 /* process.c */
 633 DECLARE_INTERRUPT_HANDLER(do_break);
 634
 635 /* time.c */
 636 DECLARE_INTERRUPT_HANDLER_ASYNC(timer_interrupt);
 637
 638 /* mce.c */
 639 DECLARE_INTERRUPT_HANDLER_NMI(machine_check_early);
 640 DECLARE_INTERRUPT_HANDLER_NMI(hmi_exception_realmode);
 641
 642 DECLARE_INTERRUPT_HANDLER_ASYNC(TAUException);
 643
 644 /* irq.c */
 645 DECLARE_INTERRUPT_HANDLER_ASYNC(do_IRQ);
 646
 647 void __noreturn unrecoverable_exception(struct pt_regs *regs);
 648
 649 void replay_system_reset(void);
 650 void replay_soft_interrupts(void);
 651
 652 static inline void interrupt_cond_local_irq_enable(struct pt_regs *regs)
 653 {
 654         if (!arch_irq_disabled_regs(regs))
 655                 local_irq_enable();
 656 }
 657
 658 long system_call_exception(struct pt_regs *regs, unsigned long r0);
 659 notrace unsigned long syscall_exit_prepare(unsigned long r3, struct pt_regs *regs, long scv);
 660 notrace unsigned long interrupt_exit_user_prepare(struct pt_regs *regs);
 661 notrace unsigned long interrupt_exit_kernel_prepare(struct pt_regs *regs);
 662 #ifdef CONFIG_PPC64
 663 unsigned long syscall_exit_restart(unsigned long r3, struct pt_regs *regs);
 664 unsigned long interrupt_exit_user_restart(struct pt_regs *regs);
 665 unsigned long interrupt_exit_kernel_restart(struct pt_regs *regs);
 666 #endif
 667
 668 #endif /* __ASSEMBLY__ */
 669
 670 #endif /* _ASM_POWERPC_INTERRUPT_H */