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/ftrace.h>
  73 #include <asm/kprobes.h>
  74 #include <asm/runlatch.h>
  75
  76 #ifdef CONFIG_PPC_BOOK3S_64
  77 extern char __end_soft_masked[];
  78 bool search_kernel_soft_mask_table(unsigned long addr);
  79 unsigned long search_kernel_restart_table(unsigned long addr);
  80
  81 DECLARE_STATIC_KEY_FALSE(interrupt_exit_not_reentrant);
  82
  83 static inline bool is_implicit_soft_masked(struct pt_regs *regs)
  84 {
  85         if (regs->msr & MSR_PR)
  86                 return false;
  87
  88         if (regs->nip >= (unsigned long)__end_soft_masked)
  89                 return false;
  90
  91         return search_kernel_soft_mask_table(regs->nip);
  92 }
  93
  94 static inline void srr_regs_clobbered(void)
  95 {
  96         local_paca->srr_valid = 0;
  97         local_paca->hsrr_valid = 0;
  98 }
  99 #else
 100 static inline unsigned long search_kernel_restart_table(unsigned long addr)
 101 {
 102         return 0;
 103 }
 104
 105 static inline bool is_implicit_soft_masked(struct pt_regs *regs)
 106 {
 107         return false;
 108 }
 109
 110 static inline void srr_regs_clobbered(void)
 111 {
 112 }
 113 #endif
 114
 115 static inline void nap_adjust_return(struct pt_regs *regs)
 116 {
 117 #ifdef CONFIG_PPC_970_NAP
 118         if (unlikely(test_thread_local_flags(_TLF_NAPPING))) {
 119                 /* Can avoid a test-and-clear because NMIs do not call this */
 120                 clear_thread_local_flags(_TLF_NAPPING);
 121                 regs_set_return_ip(regs, (unsigned long)power4_idle_nap_return);
 122         }
 123 #endif
 124 }
 125
 126 static inline void booke_restore_dbcr0(void)
 127 {
 128 #ifdef CONFIG_PPC_ADV_DEBUG_REGS
 129         unsigned long dbcr0 = current->thread.debug.dbcr0;
 130
 131         if (IS_ENABLED(CONFIG_PPC32) && unlikely(dbcr0 & DBCR0_IDM)) {
 132                 mtspr(SPRN_DBSR, -1);
 133                 mtspr(SPRN_DBCR0, global_dbcr0[smp_processor_id()]);
 134         }
 135 #endif
 136 }
 137
 138 static inline void interrupt_enter_prepare(struct pt_regs *regs)
 139 {
 140 #ifdef CONFIG_PPC32
 141         if (!arch_irq_disabled_regs(regs))
 142                 trace_hardirqs_off();
 143
 144         if (user_mode(regs))
 145                 kuap_lock();
 146         else
 147                 kuap_save_and_lock(regs);
 148
 149         if (user_mode(regs))
 150                 account_cpu_user_entry();
 151 #endif
 152
 153 #ifdef CONFIG_PPC64
 154         bool trace_enable = false;
 155
 156         if (IS_ENABLED(CONFIG_TRACE_IRQFLAGS)) {
 157                 if (irq_soft_mask_set_return(IRQS_ALL_DISABLED) == IRQS_ENABLED)
 158                         trace_enable = true;
 159         } else {
 160                 irq_soft_mask_set(IRQS_ALL_DISABLED);
 161         }
 162
 163         /*
 164          * If the interrupt was taken with HARD_DIS clear, then enable MSR[EE].
 165          * Asynchronous interrupts get here with HARD_DIS set (see below), so
 166          * this enables MSR[EE] for synchronous interrupts. IRQs remain
 167          * soft-masked. The interrupt handler may later call
 168          * interrupt_cond_local_irq_enable() to achieve a regular process
 169          * context.
 170          */
 171         if (!(local_paca->irq_happened & PACA_IRQ_HARD_DIS)) {
 172                 if (IS_ENABLED(CONFIG_PPC_IRQ_SOFT_MASK_DEBUG))
 173                         BUG_ON(!(regs->msr & MSR_EE));
 174                 __hard_irq_enable();
 175         } else {
 176                 __hard_RI_enable();
 177         }
 178
 179         /* Do this when RI=1 because it can cause SLB faults */
 180         if (trace_enable)
 181                 trace_hardirqs_off();
 182
 183         if (user_mode(regs)) {
 184                 kuap_lock();
 185                 CT_WARN_ON(ct_state() != CONTEXT_USER);
 186                 user_exit_irqoff();
 187
 188                 account_cpu_user_entry();
 189                 account_stolen_time();
 190         } else {
 191                 kuap_save_and_lock(regs);
 192                 /*
 193                  * CT_WARN_ON comes here via program_check_exception,
 194                  * so avoid recursion.
 195                  */
 196                 if (TRAP(regs) != INTERRUPT_PROGRAM) {
 197                         CT_WARN_ON(ct_state() != CONTEXT_KERNEL);
 198                         if (IS_ENABLED(CONFIG_PPC_IRQ_SOFT_MASK_DEBUG))
 199                                 BUG_ON(is_implicit_soft_masked(regs));
 200                 }
 201
 202                 /* Move this under a debugging check */
 203                 if (IS_ENABLED(CONFIG_PPC_IRQ_SOFT_MASK_DEBUG) &&
 204                                 arch_irq_disabled_regs(regs))
 205                         BUG_ON(search_kernel_restart_table(regs->nip));
 206         }
 207         if (IS_ENABLED(CONFIG_PPC_IRQ_SOFT_MASK_DEBUG))
 208                 BUG_ON(!arch_irq_disabled_regs(regs) && !(regs->msr & MSR_EE));
 209 #endif
 210
 211         booke_restore_dbcr0();
 212 }
 213
 214 /*
 215  * Care should be taken to note that interrupt_exit_prepare and
 216  * interrupt_async_exit_prepare do not necessarily return immediately to
 217  * regs context (e.g., if regs is usermode, we don't necessarily return to
 218  * user mode). Other interrupts might be taken between here and return,
 219  * context switch / preemption may occur in the exit path after this, or a
 220  * signal may be delivered, etc.
 221  *
 222  * The real interrupt exit code is platform specific, e.g.,
 223  * interrupt_exit_user_prepare / interrupt_exit_kernel_prepare for 64s.
 224  *
 225  * However interrupt_nmi_exit_prepare does return directly to regs, because
 226  * NMIs do not do "exit work" or replay soft-masked interrupts.
 227  */
 228 static inline void interrupt_exit_prepare(struct pt_regs *regs)
 229 {
 230 }
 231
 232 static inline void interrupt_async_enter_prepare(struct pt_regs *regs)
 233 {
 234 #ifdef CONFIG_PPC64
 235         /* Ensure interrupt_enter_prepare does not enable MSR[EE] */
 236         local_paca->irq_happened |= PACA_IRQ_HARD_DIS;
 237 #endif
 238         interrupt_enter_prepare(regs);
 239 #ifdef CONFIG_PPC_BOOK3S_64
 240         /*
 241          * RI=1 is set by interrupt_enter_prepare, so this thread flags access
 242          * has to come afterward (it can cause SLB faults).
 243          */
 244         if (cpu_has_feature(CPU_FTR_CTRL) &&
 245             !test_thread_local_flags(_TLF_RUNLATCH))
 246                 __ppc64_runlatch_on();
 247 #endif
 248         irq_enter();
 249 }
 250
 251 static inline void interrupt_async_exit_prepare(struct pt_regs *regs)
 252 {
 253         /*
 254          * Adjust at exit so the main handler sees the true NIA. This must
 255          * come before irq_exit() because irq_exit can enable interrupts, and
 256          * if another interrupt is taken before nap_adjust_return has run
 257          * here, then that interrupt would return directly to idle nap return.
 258          */
 259         nap_adjust_return(regs);
 260
 261         irq_exit();
 262         interrupt_exit_prepare(regs);
 263 }
 264
 265 struct interrupt_nmi_state {
 266 #ifdef CONFIG_PPC64
 267         u8 irq_soft_mask;
 268         u8 irq_happened;
 269         u8 ftrace_enabled;
 270         u64 softe;
 271 #endif
 272 };
 273
 274 static inline bool nmi_disables_ftrace(struct pt_regs *regs)
 275 {
 276         /* Allow DEC and PMI to be traced when they are soft-NMI */
 277         if (IS_ENABLED(CONFIG_PPC_BOOK3S_64)) {
 278                 if (TRAP(regs) == INTERRUPT_DECREMENTER)
 279                        return false;
 280                 if (TRAP(regs) == INTERRUPT_PERFMON)
 281                        return false;
 282         }
 283         if (IS_ENABLED(CONFIG_PPC_BOOK3E)) {
 284                 if (TRAP(regs) == INTERRUPT_PERFMON)
 285                         return false;
 286         }
 287
 288         return true;
 289 }
 290
 291 static inline void interrupt_nmi_enter_prepare(struct pt_regs *regs, struct interrupt_nmi_state *state)
 292 {
 293 #ifdef CONFIG_PPC64
 294         state->irq_soft_mask = local_paca->irq_soft_mask;
 295         state->irq_happened = local_paca->irq_happened;
 296         state->softe = regs->softe;
 297
 298         /*
 299          * Set IRQS_ALL_DISABLED unconditionally so irqs_disabled() does
 300          * the right thing, and set IRQ_HARD_DIS. We do not want to reconcile
 301          * because that goes through irq tracing which we don't want in NMI.
 302          */
 303         local_paca->irq_soft_mask = IRQS_ALL_DISABLED;
 304         local_paca->irq_happened |= PACA_IRQ_HARD_DIS;
 305
 306         if (!(regs->msr & MSR_EE) || is_implicit_soft_masked(regs)) {
 307                 /*
 308                  * Adjust regs->softe to be soft-masked if it had not been
 309                  * reconcied (e.g., interrupt entry with MSR[EE]=0 but softe
 310                  * not yet set disabled), or if it was in an implicit soft
 311                  * masked state. This makes arch_irq_disabled_regs(regs)
 312                  * behave as expected.
 313                  */
 314                 regs->softe = IRQS_ALL_DISABLED;
 315         }
 316
 317         __hard_RI_enable();
 318
 319         /* Don't do any per-CPU operations until interrupt state is fixed */
 320
 321         if (nmi_disables_ftrace(regs)) {
 322                 state->ftrace_enabled = this_cpu_get_ftrace_enabled();
 323                 this_cpu_set_ftrace_enabled(0);
 324         }
 325 #endif
 326
 327         /* If data relocations are enabled, it's safe to use nmi_enter() */
 328         if (mfmsr() & MSR_DR) {
 329                 nmi_enter();
 330                 return;
 331         }
 332
 333         /*
 334          * But do not use nmi_enter() for pseries hash guest taking a real-mode
 335          * NMI because not everything it touches is within the RMA limit.
 336          */
 337         if (IS_ENABLED(CONFIG_PPC_BOOK3S_64) &&
 338             firmware_has_feature(FW_FEATURE_LPAR) &&
 339             !radix_enabled())
 340                 return;
 341
 342         /*
 343          * Likewise, don't use it if we have some form of instrumentation (like
 344          * KASAN shadow) that is not safe to access in real mode (even on radix)
 345          */
 346         if (IS_ENABLED(CONFIG_KASAN))
 347                 return;
 348
 349         /* Otherwise, it should be safe to call it */
 350         nmi_enter();
 351 }
 352
 353 static inline void interrupt_nmi_exit_prepare(struct pt_regs *regs, struct interrupt_nmi_state *state)
 354 {
 355         if (mfmsr() & MSR_DR) {
 356                 // nmi_exit if relocations are on
 357                 nmi_exit();
 358         } else if (IS_ENABLED(CONFIG_PPC_BOOK3S_64) &&
 359                    firmware_has_feature(FW_FEATURE_LPAR) &&
 360                    !radix_enabled()) {
 361                 // no nmi_exit for a pseries hash guest taking a real mode exception
 362         } else if (IS_ENABLED(CONFIG_KASAN)) {
 363                 // no nmi_exit for KASAN in real mode
 364         } else {
 365                 nmi_exit();
 366         }
 367
 368         /*
 369          * nmi does not call nap_adjust_return because nmi should not create
 370          * new work to do (must use irq_work for that).
 371          */
 372
 373 #ifdef CONFIG_PPC64
 374 #ifdef CONFIG_PPC_BOOK3S
 375         if (arch_irq_disabled_regs(regs)) {
 376                 unsigned long rst = search_kernel_restart_table(regs->nip);
 377                 if (rst)
 378                         regs_set_return_ip(regs, rst);
 379         }
 380 #endif
 381
 382         if (nmi_disables_ftrace(regs))
 383                 this_cpu_set_ftrace_enabled(state->ftrace_enabled);
 384
 385         /* Check we didn't change the pending interrupt mask. */
 386         WARN_ON_ONCE((state->irq_happened | PACA_IRQ_HARD_DIS) != local_paca->irq_happened);
 387         regs->softe = state->softe;
 388         local_paca->irq_happened = state->irq_happened;
 389         local_paca->irq_soft_mask = state->irq_soft_mask;
 390 #endif
 391 }
 392
 393 /*
 394  * Don't use noinstr here like x86, but rather add NOKPROBE_SYMBOL to each
 395  * function definition. The reason for this is the noinstr section is placed
 396  * after the main text section, i.e., very far away from the interrupt entry
 397  * asm. That creates problems with fitting linker stubs when building large
 398  * kernels.
 399  */
 400 #define interrupt_handler __visible noinline notrace __no_kcsan __no_sanitize_address
 401
 402 /**
 403  * DECLARE_INTERRUPT_HANDLER_RAW - Declare raw interrupt handler function
 404  * @func:       Function name of the entry point
 405  * @returns:    Returns a value back to asm caller
 406  */
 407 #define DECLARE_INTERRUPT_HANDLER_RAW(func)                             \
 408         __visible long func(struct pt_regs *regs)
 409
 410 /**
 411  * DEFINE_INTERRUPT_HANDLER_RAW - Define raw interrupt handler function
 412  * @func:       Function name of the entry point
 413  * @returns:    Returns a value back to asm caller
 414  *
 415  * @func is called from ASM entry code.
 416  *
 417  * This is a plain function which does no tracing, reconciling, etc.
 418  * The macro is written so it acts as function definition. Append the
 419  * body with a pair of curly brackets.
 420  *
 421  * raw interrupt handlers must not enable or disable interrupts, or
 422  * schedule, tracing and instrumentation (ftrace, lockdep, etc) would
 423  * not be advisable either, although may be possible in a pinch, the
 424  * trace will look odd at least.
 425  *
 426  * A raw handler may call one of the other interrupt handler functions
 427  * to be converted into that interrupt context without these restrictions.
 428  *
 429  * On PPC64, _RAW handlers may return with fast_interrupt_return.
 430  *
 431  * Specific handlers may have additional restrictions.
 432  */
 433 #define DEFINE_INTERRUPT_HANDLER_RAW(func)                              \
 434 static __always_inline __no_sanitize_address __no_kcsan long            \
 435 ____##func(struct pt_regs *regs);                                       \
 436                                                                         \
 437 interrupt_handler long func(struct pt_regs *regs)                       \
 438 {                                                                       \
 439         long ret;                                                       \
 440                                                                         \
 441         __hard_RI_enable();                                             \
 442                                                                         \
 443         ret = ____##func (regs);                                        \
 444                                                                         \
 445         return ret;                                                     \
 446 }                                                                       \
 447 NOKPROBE_SYMBOL(func);                                                  \
 448                                                                         \
 449 static __always_inline __no_sanitize_address __no_kcsan long            \
 450 ____##func(struct pt_regs *regs)
 451
 452 /**
 453  * DECLARE_INTERRUPT_HANDLER - Declare synchronous interrupt handler function
 454  * @func:       Function name of the entry point
 455  */
 456 #define DECLARE_INTERRUPT_HANDLER(func)                                 \
 457         __visible void func(struct pt_regs *regs)
 458
 459 /**
 460  * DEFINE_INTERRUPT_HANDLER - Define synchronous interrupt handler function
 461  * @func:       Function name of the entry point
 462  *
 463  * @func is called from ASM entry code.
 464  *
 465  * The macro is written so it acts as function definition. Append the
 466  * body with a pair of curly brackets.
 467  */
 468 #define DEFINE_INTERRUPT_HANDLER(func)                                  \
 469 static __always_inline void ____##func(struct pt_regs *regs);           \
 470                                                                         \
 471 interrupt_handler void func(struct pt_regs *regs)                       \
 472 {                                                                       \
 473         interrupt_enter_prepare(regs);                                  \
 474                                                                         \
 475         ____##func (regs);                                              \
 476                                                                         \
 477         interrupt_exit_prepare(regs);                                   \
 478 }                                                                       \
 479 NOKPROBE_SYMBOL(func);                                                  \
 480                                                                         \
 481 static __always_inline void ____##func(struct pt_regs *regs)
 482
 483 /**
 484  * DECLARE_INTERRUPT_HANDLER_RET - Declare synchronous interrupt handler function
 485  * @func:       Function name of the entry point
 486  * @returns:    Returns a value back to asm caller
 487  */
 488 #define DECLARE_INTERRUPT_HANDLER_RET(func)                             \
 489         __visible long func(struct pt_regs *regs)
 490
 491 /**
 492  * DEFINE_INTERRUPT_HANDLER_RET - Define synchronous interrupt handler function
 493  * @func:       Function name of the entry point
 494  * @returns:    Returns a value back to asm caller
 495  *
 496  * @func is called from ASM entry code.
 497  *
 498  * The macro is written so it acts as function definition. Append the
 499  * body with a pair of curly brackets.
 500  */
 501 #define DEFINE_INTERRUPT_HANDLER_RET(func)                              \
 502 static __always_inline long ____##func(struct pt_regs *regs);           \
 503                                                                         \
 504 interrupt_handler long func(struct pt_regs *regs)                       \
 505 {                                                                       \
 506         long ret;                                                       \
 507                                                                         \
 508         interrupt_enter_prepare(regs);                                  \
 509                                                                         \
 510         ret = ____##func (regs);                                        \
 511                                                                         \
 512         interrupt_exit_prepare(regs);                                   \
 513                                                                         \
 514         return ret;                                                     \
 515 }                                                                       \
 516 NOKPROBE_SYMBOL(func);                                                  \
 517                                                                         \
 518 static __always_inline long ____##func(struct pt_regs *regs)
 519
 520 /**
 521  * DECLARE_INTERRUPT_HANDLER_ASYNC - Declare asynchronous interrupt handler function
 522  * @func:       Function name of the entry point
 523  */
 524 #define DECLARE_INTERRUPT_HANDLER_ASYNC(func)                           \
 525         __visible void func(struct pt_regs *regs)
 526
 527 /**
 528  * DEFINE_INTERRUPT_HANDLER_ASYNC - Define asynchronous interrupt handler function
 529  * @func:       Function name of the entry point
 530  *
 531  * @func is called from ASM entry code.
 532  *
 533  * The macro is written so it acts as function definition. Append the
 534  * body with a pair of curly brackets.
 535  */
 536 #define DEFINE_INTERRUPT_HANDLER_ASYNC(func)                            \
 537 static __always_inline void ____##func(struct pt_regs *regs);           \
 538                                                                         \
 539 interrupt_handler void func(struct pt_regs *regs)                       \
 540 {                                                                       \
 541         interrupt_async_enter_prepare(regs);                            \
 542                                                                         \
 543         ____##func (regs);                                              \
 544                                                                         \
 545         interrupt_async_exit_prepare(regs);                             \
 546 }                                                                       \
 547 NOKPROBE_SYMBOL(func);                                                  \
 548                                                                         \
 549 static __always_inline void ____##func(struct pt_regs *regs)
 550
 551 /**
 552  * DECLARE_INTERRUPT_HANDLER_NMI - Declare NMI interrupt handler function
 553  * @func:       Function name of the entry point
 554  * @returns:    Returns a value back to asm caller
 555  */
 556 #define DECLARE_INTERRUPT_HANDLER_NMI(func)                             \
 557         __visible long func(struct pt_regs *regs)
 558
 559 /**
 560  * DEFINE_INTERRUPT_HANDLER_NMI - Define NMI interrupt handler function
 561  * @func:       Function name of the entry point
 562  * @returns:    Returns a value back to asm caller
 563  *
 564  * @func is called from ASM entry code.
 565  *
 566  * The macro is written so it acts as function definition. Append the
 567  * body with a pair of curly brackets.
 568  */
 569 #define DEFINE_INTERRUPT_HANDLER_NMI(func)                              \
 570 static __always_inline __no_sanitize_address __no_kcsan long            \
 571 ____##func(struct pt_regs *regs);                                       \
 572                                                                         \
 573 interrupt_handler long func(struct pt_regs *regs)                       \
 574 {                                                                       \
 575         struct interrupt_nmi_state state;                               \
 576         long ret;                                                       \
 577                                                                         \
 578         interrupt_nmi_enter_prepare(regs, &state);                      \
 579                                                                         \
 580         ret = ____##func (regs);                                        \
 581                                                                         \
 582         interrupt_nmi_exit_prepare(regs, &state);                       \
 583                                                                         \
 584         return ret;                                                     \
 585 }                                                                       \
 586 NOKPROBE_SYMBOL(func);                                                  \
 587                                                                         \
 588 static __always_inline  __no_sanitize_address __no_kcsan long           \
 589 ____##func(struct pt_regs *regs)
 590
 591
 592 /* Interrupt handlers */
 593 /* kernel/traps.c */
 594 DECLARE_INTERRUPT_HANDLER_NMI(system_reset_exception);
 595 #ifdef CONFIG_PPC_BOOK3S_64
 596 DECLARE_INTERRUPT_HANDLER_ASYNC(machine_check_exception_async);
 597 #endif
 598 DECLARE_INTERRUPT_HANDLER_NMI(machine_check_exception);
 599 DECLARE_INTERRUPT_HANDLER(SMIException);
 600 DECLARE_INTERRUPT_HANDLER(handle_hmi_exception);
 601 DECLARE_INTERRUPT_HANDLER(unknown_exception);
 602 DECLARE_INTERRUPT_HANDLER_ASYNC(unknown_async_exception);
 603 DECLARE_INTERRUPT_HANDLER_NMI(unknown_nmi_exception);
 604 DECLARE_INTERRUPT_HANDLER(instruction_breakpoint_exception);
 605 DECLARE_INTERRUPT_HANDLER(RunModeException);
 606 DECLARE_INTERRUPT_HANDLER(single_step_exception);
 607 DECLARE_INTERRUPT_HANDLER(program_check_exception);
 608 DECLARE_INTERRUPT_HANDLER(emulation_assist_interrupt);
 609 DECLARE_INTERRUPT_HANDLER(alignment_exception);
 610 DECLARE_INTERRUPT_HANDLER(StackOverflow);
 611 DECLARE_INTERRUPT_HANDLER(stack_overflow_exception);
 612 DECLARE_INTERRUPT_HANDLER(kernel_fp_unavailable_exception);
 613 DECLARE_INTERRUPT_HANDLER(altivec_unavailable_exception);
 614 DECLARE_INTERRUPT_HANDLER(vsx_unavailable_exception);
 615 DECLARE_INTERRUPT_HANDLER(facility_unavailable_exception);
 616 DECLARE_INTERRUPT_HANDLER(fp_unavailable_tm);
 617 DECLARE_INTERRUPT_HANDLER(altivec_unavailable_tm);
 618 DECLARE_INTERRUPT_HANDLER(vsx_unavailable_tm);
 619 DECLARE_INTERRUPT_HANDLER_NMI(performance_monitor_exception_nmi);
 620 DECLARE_INTERRUPT_HANDLER_ASYNC(performance_monitor_exception_async);
 621 DECLARE_INTERRUPT_HANDLER_RAW(performance_monitor_exception);
 622 DECLARE_INTERRUPT_HANDLER(DebugException);
 623 DECLARE_INTERRUPT_HANDLER(altivec_assist_exception);
 624 DECLARE_INTERRUPT_HANDLER(CacheLockingException);
 625 DECLARE_INTERRUPT_HANDLER(SPEFloatingPointException);
 626 DECLARE_INTERRUPT_HANDLER(SPEFloatingPointRoundException);
 627 DECLARE_INTERRUPT_HANDLER_NMI(WatchdogException);
 628 DECLARE_INTERRUPT_HANDLER(kernel_bad_stack);
 629
 630 /* slb.c */
 631 DECLARE_INTERRUPT_HANDLER_RAW(do_slb_fault);
 632 DECLARE_INTERRUPT_HANDLER(do_bad_segment_interrupt);
 633
 634 /* hash_utils.c */
 635 DECLARE_INTERRUPT_HANDLER(do_hash_fault);
 636
 637 /* fault.c */
 638 DECLARE_INTERRUPT_HANDLER(do_page_fault);
 639 DECLARE_INTERRUPT_HANDLER(do_bad_page_fault_segv);
 640
 641 /* process.c */
 642 DECLARE_INTERRUPT_HANDLER(do_break);
 643
 644 /* time.c */
 645 DECLARE_INTERRUPT_HANDLER_ASYNC(timer_interrupt);
 646
 647 /* mce.c */
 648 DECLARE_INTERRUPT_HANDLER_NMI(machine_check_early);
 649 DECLARE_INTERRUPT_HANDLER_NMI(hmi_exception_realmode);
 650
 651 DECLARE_INTERRUPT_HANDLER_ASYNC(TAUException);
 652
 653 /* irq.c */
 654 DECLARE_INTERRUPT_HANDLER_ASYNC(do_IRQ);
 655
 656 void __noreturn unrecoverable_exception(struct pt_regs *regs);
 657
 658 void replay_system_reset(void);
 659 void replay_soft_interrupts(void);
 660
 661 static inline void interrupt_cond_local_irq_enable(struct pt_regs *regs)
 662 {
 663         if (!arch_irq_disabled_regs(regs))
 664                 local_irq_enable();
 665 }
 666
 667 long system_call_exception(long r3, long r4, long r5, long r6, long r7, long r8,
 668                            unsigned long r0, struct pt_regs *regs);
 669 notrace unsigned long syscall_exit_prepare(unsigned long r3, struct pt_regs *regs, long scv);
 670 notrace unsigned long interrupt_exit_user_prepare(struct pt_regs *regs);
 671 notrace unsigned long interrupt_exit_kernel_prepare(struct pt_regs *regs);
 672 #ifdef CONFIG_PPC64
 673 unsigned long syscall_exit_restart(unsigned long r3, struct pt_regs *regs);
 674 unsigned long interrupt_exit_user_restart(struct pt_regs *regs);
 675 unsigned long interrupt_exit_kernel_restart(struct pt_regs *regs);
 676 #endif
 677
 678 #endif /* __ASSEMBLY__ */
 679
 680 #endif /* _ASM_POWERPC_INTERRUPT_H */