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_BOOK3S_64
  78 extern char __end_soft_masked[];
  79 bool search_kernel_soft_mask_table(unsigned long addr);
  80 unsigned long search_kernel_restart_table(unsigned long addr);
  81
  82 DECLARE_STATIC_KEY_FALSE(interrupt_exit_not_reentrant);
  83
  84 static inline bool is_implicit_soft_masked(struct pt_regs *regs)
  85 {
  86         if (regs->msr & MSR_PR)
  87                 return false;
  88
  89         if (regs->nip >= (unsigned long)__end_soft_masked)
  90                 return false;
  91
  92         return search_kernel_soft_mask_table(regs->nip);
  93 }
  94
  95 static inline void srr_regs_clobbered(void)
  96 {
  97         local_paca->srr_valid = 0;
  98         local_paca->hsrr_valid = 0;
  99 }
 100 #else
 101 static inline unsigned long search_kernel_restart_table(unsigned long addr)
 102 {
 103         return 0;
 104 }
 105
 106 static inline bool is_implicit_soft_masked(struct pt_regs *regs)
 107 {
 108         return false;
 109 }
 110
 111 static inline void srr_regs_clobbered(void)
 112 {
 113 }
 114 #endif
 115
 116 static inline void nap_adjust_return(struct pt_regs *regs)
 117 {
 118 #ifdef CONFIG_PPC_970_NAP
 119         if (unlikely(test_thread_local_flags(_TLF_NAPPING))) {
 120                 /* Can avoid a test-and-clear because NMIs do not call this */
 121                 clear_thread_local_flags(_TLF_NAPPING);
 122                 regs_set_return_ip(regs, (unsigned long)power4_idle_nap_return);
 123         }
 124 #endif
 125 }
 126
 127 static inline void booke_restore_dbcr0(void)
 128 {
 129 #ifdef CONFIG_PPC_ADV_DEBUG_REGS
 130         unsigned long dbcr0 = current->thread.debug.dbcr0;
 131
 132         if (IS_ENABLED(CONFIG_PPC32) && unlikely(dbcr0 & DBCR0_IDM)) {
 133                 mtspr(SPRN_DBSR, -1);
 134                 mtspr(SPRN_DBCR0, global_dbcr0[smp_processor_id()]);
 135         }
 136 #endif
 137 }
 138
 139 static inline void interrupt_enter_prepare(struct pt_regs *regs)
 140 {
 141 #ifdef CONFIG_PPC32
 142         if (!arch_irq_disabled_regs(regs))
 143                 trace_hardirqs_off();
 144
 145         if (user_mode(regs))
 146                 kuap_lock();
 147         else
 148                 kuap_save_and_lock(regs);
 149
 150         if (user_mode(regs))
 151                 account_cpu_user_entry();
 152 #endif
 153
 154 #ifdef CONFIG_PPC64
 155         bool trace_enable = false;
 156
 157         if (IS_ENABLED(CONFIG_TRACE_IRQFLAGS)) {
 158                 if (irq_soft_mask_set_return(IRQS_ALL_DISABLED) == IRQS_ENABLED)
 159                         trace_enable = true;
 160         } else {
 161                 irq_soft_mask_set(IRQS_ALL_DISABLED);
 162         }
 163
 164         /*
 165          * If the interrupt was taken with HARD_DIS clear, then enable MSR[EE].
 166          * Asynchronous interrupts get here with HARD_DIS set (see below), so
 167          * this enables MSR[EE] for synchronous interrupts. IRQs remain
 168          * soft-masked. The interrupt handler may later call
 169          * interrupt_cond_local_irq_enable() to achieve a regular process
 170          * context.
 171          */
 172         if (!(local_paca->irq_happened & PACA_IRQ_HARD_DIS)) {
 173                 if (IS_ENABLED(CONFIG_PPC_IRQ_SOFT_MASK_DEBUG))
 174                         BUG_ON(!(regs->msr & MSR_EE));
 175                 __hard_irq_enable();
 176         } else {
 177                 __hard_RI_enable();
 178         }
 179
 180         /* Do this when RI=1 because it can cause SLB faults */
 181         if (trace_enable)
 182                 trace_hardirqs_off();
 183
 184         if (user_mode(regs)) {
 185                 kuap_lock();
 186                 CT_WARN_ON(ct_state() != CONTEXT_USER);
 187                 user_exit_irqoff();
 188
 189                 account_cpu_user_entry();
 190                 account_stolen_time();
 191         } else {
 192                 kuap_save_and_lock(regs);
 193                 /*
 194                  * CT_WARN_ON comes here via program_check_exception,
 195                  * so avoid recursion.
 196                  */
 197                 if (TRAP(regs) != INTERRUPT_PROGRAM) {
 198                         CT_WARN_ON(ct_state() != CONTEXT_KERNEL);
 199                         if (IS_ENABLED(CONFIG_PPC_IRQ_SOFT_MASK_DEBUG))
 200                                 BUG_ON(is_implicit_soft_masked(regs));
 201                 }
 202
 203                 /* Move this under a debugging check */
 204                 if (IS_ENABLED(CONFIG_PPC_IRQ_SOFT_MASK_DEBUG) &&
 205                                 arch_irq_disabled_regs(regs))
 206                         BUG_ON(search_kernel_restart_table(regs->nip));
 207         }
 208         if (IS_ENABLED(CONFIG_PPC_IRQ_SOFT_MASK_DEBUG))
 209                 BUG_ON(!arch_irq_disabled_regs(regs) && !(regs->msr & MSR_EE));
 210 #endif
 211
 212         booke_restore_dbcr0();
 213 }
 214
 215 /*
 216  * Care should be taken to note that interrupt_exit_prepare and
 217  * interrupt_async_exit_prepare do not necessarily return immediately to
 218  * regs context (e.g., if regs is usermode, we don't necessarily return to
 219  * user mode). Other interrupts might be taken between here and return,
 220  * context switch / preemption may occur in the exit path after this, or a
 221  * signal may be delivered, etc.
 222  *
 223  * The real interrupt exit code is platform specific, e.g.,
 224  * interrupt_exit_user_prepare / interrupt_exit_kernel_prepare for 64s.
 225  *
 226  * However interrupt_nmi_exit_prepare does return directly to regs, because
 227  * NMIs do not do "exit work" or replay soft-masked interrupts.
 228  */
 229 static inline void interrupt_exit_prepare(struct pt_regs *regs)
 230 {
 231 }
 232
 233 static inline void interrupt_async_enter_prepare(struct pt_regs *regs)
 234 {
 235 #ifdef CONFIG_PPC64
 236         /* Ensure interrupt_enter_prepare does not enable MSR[EE] */
 237         local_paca->irq_happened |= PACA_IRQ_HARD_DIS;
 238 #endif
 239         interrupt_enter_prepare(regs);
 240 #ifdef CONFIG_PPC_BOOK3S_64
 241         /*
 242          * RI=1 is set by interrupt_enter_prepare, so this thread flags access
 243          * has to come afterward (it can cause SLB faults).
 244          */
 245         if (cpu_has_feature(CPU_FTR_CTRL) &&
 246             !test_thread_local_flags(_TLF_RUNLATCH))
 247                 __ppc64_runlatch_on();
 248 #endif
 249         irq_enter();
 250 }
 251
 252 static inline void interrupt_async_exit_prepare(struct pt_regs *regs)
 253 {
 254         /*
 255          * Adjust at exit so the main handler sees the true NIA. This must
 256          * come before irq_exit() because irq_exit can enable interrupts, and
 257          * if another interrupt is taken before nap_adjust_return has run
 258          * here, then that interrupt would return directly to idle nap return.
 259          */
 260         nap_adjust_return(regs);
 261
 262         irq_exit();
 263         interrupt_exit_prepare(regs);
 264 }
 265
 266 struct interrupt_nmi_state {
 267 #ifdef CONFIG_PPC64
 268         u8 irq_soft_mask;
 269         u8 irq_happened;
 270         u8 ftrace_enabled;
 271         u64 softe;
 272 #endif
 273 };
 274
 275 static inline bool nmi_disables_ftrace(struct pt_regs *regs)
 276 {
 277         /* Allow DEC and PMI to be traced when they are soft-NMI */
 278         if (IS_ENABLED(CONFIG_PPC_BOOK3S_64)) {
 279                 if (TRAP(regs) == INTERRUPT_DECREMENTER)
 280                        return false;
 281                 if (TRAP(regs) == INTERRUPT_PERFMON)
 282                        return false;
 283         }
 284         if (IS_ENABLED(CONFIG_PPC_BOOK3E)) {
 285                 if (TRAP(regs) == INTERRUPT_PERFMON)
 286                         return false;
 287         }
 288
 289         return true;
 290 }
 291
 292 static inline void interrupt_nmi_enter_prepare(struct pt_regs *regs, struct interrupt_nmi_state *state)
 293 {
 294 #ifdef CONFIG_PPC64
 295         state->irq_soft_mask = local_paca->irq_soft_mask;
 296         state->irq_happened = local_paca->irq_happened;
 297         state->softe = regs->softe;
 298
 299         /*
 300          * Set IRQS_ALL_DISABLED unconditionally so irqs_disabled() does
 301          * the right thing, and set IRQ_HARD_DIS. We do not want to reconcile
 302          * because that goes through irq tracing which we don't want in NMI.
 303          */
 304         local_paca->irq_soft_mask = IRQS_ALL_DISABLED;
 305         local_paca->irq_happened |= PACA_IRQ_HARD_DIS;
 306
 307         if (!(regs->msr & MSR_EE) || is_implicit_soft_masked(regs)) {
 308                 /*
 309                  * Adjust regs->softe to be soft-masked if it had not been
 310                  * reconcied (e.g., interrupt entry with MSR[EE]=0 but softe
 311                  * not yet set disabled), or if it was in an implicit soft
 312                  * masked state. This makes arch_irq_disabled_regs(regs)
 313                  * behave as expected.
 314                  */
 315                 regs->softe = IRQS_ALL_DISABLED;
 316         }
 317
 318         __hard_RI_enable();
 319
 320         /* Don't do any per-CPU operations until interrupt state is fixed */
 321
 322         if (nmi_disables_ftrace(regs)) {
 323                 state->ftrace_enabled = this_cpu_get_ftrace_enabled();
 324                 this_cpu_set_ftrace_enabled(0);
 325         }
 326 #endif
 327
 328         /* If data relocations are enabled, it's safe to use nmi_enter() */
 329         if (mfmsr() & MSR_DR) {
 330                 nmi_enter();
 331                 return;
 332         }
 333
 334         /*
 335          * But do not use nmi_enter() for pseries hash guest taking a real-mode
 336          * NMI because not everything it touches is within the RMA limit.
 337          */
 338         if (IS_ENABLED(CONFIG_PPC_BOOK3S_64) &&
 339             firmware_has_feature(FW_FEATURE_LPAR) &&
 340             !radix_enabled())
 341                 return;
 342
 343         /*
 344          * Likewise, don't use it if we have some form of instrumentation (like
 345          * KASAN shadow) that is not safe to access in real mode (even on radix)
 346          */
 347         if (IS_ENABLED(CONFIG_KASAN))
 348                 return;
 349
 350         /* Otherwise, it should be safe to call it */
 351         nmi_enter();
 352 }
 353
 354 static inline void interrupt_nmi_exit_prepare(struct pt_regs *regs, struct interrupt_nmi_state *state)
 355 {
 356         if (mfmsr() & MSR_DR) {
 357                 // nmi_exit if relocations are on
 358                 nmi_exit();
 359         } else if (IS_ENABLED(CONFIG_PPC_BOOK3S_64) &&
 360                    firmware_has_feature(FW_FEATURE_LPAR) &&
 361                    !radix_enabled()) {
 362                 // no nmi_exit for a pseries hash guest taking a real mode exception
 363         } else if (IS_ENABLED(CONFIG_KASAN)) {
 364                 // no nmi_exit for KASAN in real mode
 365         } else {
 366                 nmi_exit();
 367         }
 368
 369         /*
 370          * nmi does not call nap_adjust_return because nmi should not create
 371          * new work to do (must use irq_work for that).
 372          */
 373
 374 #ifdef CONFIG_PPC64
 375 #ifdef CONFIG_PPC_BOOK3S
 376         if (arch_irq_disabled_regs(regs)) {
 377                 unsigned long rst = search_kernel_restart_table(regs->nip);
 378                 if (rst)
 379                         regs_set_return_ip(regs, rst);
 380         }
 381 #endif
 382
 383         if (nmi_disables_ftrace(regs))
 384                 this_cpu_set_ftrace_enabled(state->ftrace_enabled);
 385
 386         /* Check we didn't change the pending interrupt mask. */
 387         WARN_ON_ONCE((state->irq_happened | PACA_IRQ_HARD_DIS) != local_paca->irq_happened);
 388         regs->softe = state->softe;
 389         local_paca->irq_happened = state->irq_happened;
 390         local_paca->irq_soft_mask = state->irq_soft_mask;
 391 #endif
 392 }
 393
 394 /*
 395  * Don't use noinstr here like x86, but rather add NOKPROBE_SYMBOL to each
 396  * function definition. The reason for this is the noinstr section is placed
 397  * after the main text section, i.e., very far away from the interrupt entry
 398  * asm. That creates problems with fitting linker stubs when building large
 399  * kernels.
 400  */
 401 #define interrupt_handler __visible noinline notrace __no_kcsan __no_sanitize_address
 402
 403 /**
 404  * DECLARE_INTERRUPT_HANDLER_RAW - Declare raw interrupt handler function
 405  * @func:       Function name of the entry point
 406  * @returns:    Returns a value back to asm caller
 407  */
 408 #define DECLARE_INTERRUPT_HANDLER_RAW(func)                             \
 409         __visible long func(struct pt_regs *regs)
 410
 411 /**
 412  * DEFINE_INTERRUPT_HANDLER_RAW - Define raw interrupt handler function
 413  * @func:       Function name of the entry point
 414  * @returns:    Returns a value back to asm caller
 415  *
 416  * @func is called from ASM entry code.
 417  *
 418  * This is a plain function which does no tracing, reconciling, etc.
 419  * The macro is written so it acts as function definition. Append the
 420  * body with a pair of curly brackets.
 421  *
 422  * raw interrupt handlers must not enable or disable interrupts, or
 423  * schedule, tracing and instrumentation (ftrace, lockdep, etc) would
 424  * not be advisable either, although may be possible in a pinch, the
 425  * trace will look odd at least.
 426  *
 427  * A raw handler may call one of the other interrupt handler functions
 428  * to be converted into that interrupt context without these restrictions.
 429  *
 430  * On PPC64, _RAW handlers may return with fast_interrupt_return.
 431  *
 432  * Specific handlers may have additional restrictions.
 433  */
 434 #define DEFINE_INTERRUPT_HANDLER_RAW(func)                              \
 435 static __always_inline __no_sanitize_address __no_kcsan long            \
 436 ____##func(struct pt_regs *regs);                                       \
 437                                                                         \
 438 interrupt_handler long func(struct pt_regs *regs)                       \
 439 {                                                                       \
 440         long ret;                                                       \
 441                                                                         \
 442         __hard_RI_enable();                                             \
 443                                                                         \
 444         ret = ____##func (regs);                                        \
 445                                                                         \
 446         return ret;                                                     \
 447 }                                                                       \
 448 NOKPROBE_SYMBOL(func);                                                  \
 449                                                                         \
 450 static __always_inline __no_sanitize_address __no_kcsan long            \
 451 ____##func(struct pt_regs *regs)
 452
 453 /**
 454  * DECLARE_INTERRUPT_HANDLER - Declare synchronous interrupt handler function
 455  * @func:       Function name of the entry point
 456  */
 457 #define DECLARE_INTERRUPT_HANDLER(func)                                 \
 458         __visible void func(struct pt_regs *regs)
 459
 460 /**
 461  * DEFINE_INTERRUPT_HANDLER - Define synchronous interrupt handler function
 462  * @func:       Function name of the entry point
 463  *
 464  * @func is called from ASM entry code.
 465  *
 466  * The macro is written so it acts as function definition. Append the
 467  * body with a pair of curly brackets.
 468  */
 469 #define DEFINE_INTERRUPT_HANDLER(func)                                  \
 470 static __always_inline void ____##func(struct pt_regs *regs);           \
 471                                                                         \
 472 interrupt_handler void func(struct pt_regs *regs)                       \
 473 {                                                                       \
 474         interrupt_enter_prepare(regs);                                  \
 475                                                                         \
 476         ____##func (regs);                                              \
 477                                                                         \
 478         interrupt_exit_prepare(regs);                                   \
 479 }                                                                       \
 480 NOKPROBE_SYMBOL(func);                                                  \
 481                                                                         \
 482 static __always_inline void ____##func(struct pt_regs *regs)
 483
 484 /**
 485  * DECLARE_INTERRUPT_HANDLER_RET - Declare synchronous interrupt handler function
 486  * @func:       Function name of the entry point
 487  * @returns:    Returns a value back to asm caller
 488  */
 489 #define DECLARE_INTERRUPT_HANDLER_RET(func)                             \
 490         __visible long func(struct pt_regs *regs)
 491
 492 /**
 493  * DEFINE_INTERRUPT_HANDLER_RET - Define synchronous interrupt handler function
 494  * @func:       Function name of the entry point
 495  * @returns:    Returns a value back to asm caller
 496  *
 497  * @func is called from ASM entry code.
 498  *
 499  * The macro is written so it acts as function definition. Append the
 500  * body with a pair of curly brackets.
 501  */
 502 #define DEFINE_INTERRUPT_HANDLER_RET(func)                              \
 503 static __always_inline long ____##func(struct pt_regs *regs);           \
 504                                                                         \
 505 interrupt_handler long func(struct pt_regs *regs)                       \
 506 {                                                                       \
 507         long ret;                                                       \
 508                                                                         \
 509         interrupt_enter_prepare(regs);                                  \
 510                                                                         \
 511         ret = ____##func (regs);                                        \
 512                                                                         \
 513         interrupt_exit_prepare(regs);                                   \
 514                                                                         \
 515         return ret;                                                     \
 516 }                                                                       \
 517 NOKPROBE_SYMBOL(func);                                                  \
 518                                                                         \
 519 static __always_inline long ____##func(struct pt_regs *regs)
 520
 521 /**
 522  * DECLARE_INTERRUPT_HANDLER_ASYNC - Declare asynchronous interrupt handler function
 523  * @func:       Function name of the entry point
 524  */
 525 #define DECLARE_INTERRUPT_HANDLER_ASYNC(func)                           \
 526         __visible void func(struct pt_regs *regs)
 527
 528 /**
 529  * DEFINE_INTERRUPT_HANDLER_ASYNC - Define asynchronous interrupt handler function
 530  * @func:       Function name of the entry point
 531  *
 532  * @func is called from ASM entry code.
 533  *
 534  * The macro is written so it acts as function definition. Append the
 535  * body with a pair of curly brackets.
 536  */
 537 #define DEFINE_INTERRUPT_HANDLER_ASYNC(func)                            \
 538 static __always_inline void ____##func(struct pt_regs *regs);           \
 539                                                                         \
 540 interrupt_handler void func(struct pt_regs *regs)                       \
 541 {                                                                       \
 542         interrupt_async_enter_prepare(regs);                            \
 543                                                                         \
 544         ____##func (regs);                                              \
 545                                                                         \
 546         interrupt_async_exit_prepare(regs);                             \
 547 }                                                                       \
 548 NOKPROBE_SYMBOL(func);                                                  \
 549                                                                         \
 550 static __always_inline void ____##func(struct pt_regs *regs)
 551
 552 /**
 553  * DECLARE_INTERRUPT_HANDLER_NMI - Declare NMI interrupt handler function
 554  * @func:       Function name of the entry point
 555  * @returns:    Returns a value back to asm caller
 556  */
 557 #define DECLARE_INTERRUPT_HANDLER_NMI(func)                             \
 558         __visible long func(struct pt_regs *regs)
 559
 560 /**
 561  * DEFINE_INTERRUPT_HANDLER_NMI - Define NMI interrupt handler function
 562  * @func:       Function name of the entry point
 563  * @returns:    Returns a value back to asm caller
 564  *
 565  * @func is called from ASM entry code.
 566  *
 567  * The macro is written so it acts as function definition. Append the
 568  * body with a pair of curly brackets.
 569  */
 570 #define DEFINE_INTERRUPT_HANDLER_NMI(func)                              \
 571 static __always_inline __no_sanitize_address __no_kcsan long            \
 572 ____##func(struct pt_regs *regs);                                       \
 573                                                                         \
 574 interrupt_handler long func(struct pt_regs *regs)                       \
 575 {                                                                       \
 576         struct interrupt_nmi_state state;                               \
 577         long ret;                                                       \
 578                                                                         \
 579         interrupt_nmi_enter_prepare(regs, &state);                      \
 580                                                                         \
 581         ret = ____##func (regs);                                        \
 582                                                                         \
 583         interrupt_nmi_exit_prepare(regs, &state);                       \
 584                                                                         \
 585         return ret;                                                     \
 586 }                                                                       \
 587 NOKPROBE_SYMBOL(func);                                                  \
 588                                                                         \
 589 static __always_inline  __no_sanitize_address __no_kcsan long           \
 590 ____##func(struct pt_regs *regs)
 591
 592
 593 /* Interrupt handlers */
 594 /* kernel/traps.c */
 595 DECLARE_INTERRUPT_HANDLER_NMI(system_reset_exception);
 596 #ifdef CONFIG_PPC_BOOK3S_64
 597 DECLARE_INTERRUPT_HANDLER_ASYNC(machine_check_exception_async);
 598 #endif
 599 DECLARE_INTERRUPT_HANDLER_NMI(machine_check_exception);
 600 DECLARE_INTERRUPT_HANDLER(SMIException);
 601 DECLARE_INTERRUPT_HANDLER(handle_hmi_exception);
 602 DECLARE_INTERRUPT_HANDLER(unknown_exception);
 603 DECLARE_INTERRUPT_HANDLER_ASYNC(unknown_async_exception);
 604 DECLARE_INTERRUPT_HANDLER_NMI(unknown_nmi_exception);
 605 DECLARE_INTERRUPT_HANDLER(instruction_breakpoint_exception);
 606 DECLARE_INTERRUPT_HANDLER(RunModeException);
 607 DECLARE_INTERRUPT_HANDLER(single_step_exception);
 608 DECLARE_INTERRUPT_HANDLER(program_check_exception);
 609 DECLARE_INTERRUPT_HANDLER(emulation_assist_interrupt);
 610 DECLARE_INTERRUPT_HANDLER(alignment_exception);
 611 DECLARE_INTERRUPT_HANDLER(StackOverflow);
 612 DECLARE_INTERRUPT_HANDLER(stack_overflow_exception);
 613 DECLARE_INTERRUPT_HANDLER(kernel_fp_unavailable_exception);
 614 DECLARE_INTERRUPT_HANDLER(altivec_unavailable_exception);
 615 DECLARE_INTERRUPT_HANDLER(vsx_unavailable_exception);
 616 DECLARE_INTERRUPT_HANDLER(facility_unavailable_exception);
 617 DECLARE_INTERRUPT_HANDLER(fp_unavailable_tm);
 618 DECLARE_INTERRUPT_HANDLER(altivec_unavailable_tm);
 619 DECLARE_INTERRUPT_HANDLER(vsx_unavailable_tm);
 620 DECLARE_INTERRUPT_HANDLER_NMI(performance_monitor_exception_nmi);
 621 DECLARE_INTERRUPT_HANDLER_ASYNC(performance_monitor_exception_async);
 622 DECLARE_INTERRUPT_HANDLER_RAW(performance_monitor_exception);
 623 DECLARE_INTERRUPT_HANDLER(DebugException);
 624 DECLARE_INTERRUPT_HANDLER(altivec_assist_exception);
 625 DECLARE_INTERRUPT_HANDLER(CacheLockingException);
 626 DECLARE_INTERRUPT_HANDLER(SPEFloatingPointException);
 627 DECLARE_INTERRUPT_HANDLER(SPEFloatingPointRoundException);
 628 DECLARE_INTERRUPT_HANDLER_NMI(WatchdogException);
 629 DECLARE_INTERRUPT_HANDLER(kernel_bad_stack);
 630
 631 /* slb.c */
 632 DECLARE_INTERRUPT_HANDLER_RAW(do_slb_fault);
 633 DECLARE_INTERRUPT_HANDLER(do_bad_segment_interrupt);
 634
 635 /* hash_utils.c */
 636 DECLARE_INTERRUPT_HANDLER(do_hash_fault);
 637
 638 /* fault.c */
 639 DECLARE_INTERRUPT_HANDLER(do_page_fault);
 640 DECLARE_INTERRUPT_HANDLER(do_bad_page_fault_segv);
 641
 642 /* process.c */
 643 DECLARE_INTERRUPT_HANDLER(do_break);
 644
 645 /* time.c */
 646 DECLARE_INTERRUPT_HANDLER_ASYNC(timer_interrupt);
 647
 648 /* mce.c */
 649 DECLARE_INTERRUPT_HANDLER_NMI(machine_check_early);
 650 DECLARE_INTERRUPT_HANDLER_NMI(hmi_exception_realmode);
 651
 652 DECLARE_INTERRUPT_HANDLER_ASYNC(TAUException);
 653
 654 /* irq.c */
 655 DECLARE_INTERRUPT_HANDLER_ASYNC(do_IRQ);
 656
 657 void __noreturn unrecoverable_exception(struct pt_regs *regs);
 658
 659 void replay_system_reset(void);
 660 void replay_soft_interrupts(void);
 661
 662 static inline void interrupt_cond_local_irq_enable(struct pt_regs *regs)
 663 {
 664         if (!arch_irq_disabled_regs(regs))
 665                 local_irq_enable();
 666 }
 667
 668 long system_call_exception(long r3, long r4, long r5, long r6, long r7, long r8,
 669                            unsigned long r0, struct pt_regs *regs);
 670 notrace unsigned long syscall_exit_prepare(unsigned long r3, struct pt_regs *regs, long scv);
 671 notrace unsigned long interrupt_exit_user_prepare(struct pt_regs *regs);
 672 notrace unsigned long interrupt_exit_kernel_prepare(struct pt_regs *regs);
 673 #ifdef CONFIG_PPC64
 674 unsigned long syscall_exit_restart(unsigned long r3, struct pt_regs *regs);
 675 unsigned long interrupt_exit_user_restart(struct pt_regs *regs);
 676 unsigned long interrupt_exit_kernel_restart(struct pt_regs *regs);
 677 #endif
 678
 679 #endif /* __ASSEMBLY__ */
 680
 681 #endif /* _ASM_POWERPC_INTERRUPT_H */