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_PPC64
  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 (IS_ENABLED(CONFIG_PPC_IRQ_SOFT_MASK_DEBUG) &&               \
  85             (user_mode(regs) || (TRAP(regs) != INTERRUPT_PROGRAM)))     \
  86                 BUG_ON(cond);                                           \
  87 } while (0)
  88 #endif
  89
  90 #ifdef CONFIG_PPC_BOOK3S_64
  91 extern char __end_soft_masked[];
  92 bool search_kernel_soft_mask_table(unsigned long addr);
  93 unsigned long search_kernel_restart_table(unsigned long addr);
  94
  95 DECLARE_STATIC_KEY_FALSE(interrupt_exit_not_reentrant);
  96
  97 static inline bool is_implicit_soft_masked(struct pt_regs *regs)
  98 {
  99         if (regs->msr & MSR_PR)
 100                 return false;
 101
 102         if (regs->nip >= (unsigned long)__end_soft_masked)
 103                 return false;
 104
 105         return search_kernel_soft_mask_table(regs->nip);
 106 }
 107
 108 static inline void srr_regs_clobbered(void)
 109 {
 110         local_paca->srr_valid = 0;
 111         local_paca->hsrr_valid = 0;
 112 }
 113 #else
 114 static inline unsigned long search_kernel_restart_table(unsigned long addr)
 115 {
 116         return 0;
 117 }
 118
 119 static inline bool is_implicit_soft_masked(struct pt_regs *regs)
 120 {
 121         return false;
 122 }
 123
 124 static inline void srr_regs_clobbered(void)
 125 {
 126 }
 127 #endif
 128
 129 static inline void nap_adjust_return(struct pt_regs *regs)
 130 {
 131 #ifdef CONFIG_PPC_970_NAP
 132         if (unlikely(test_thread_local_flags(_TLF_NAPPING))) {
 133                 /* Can avoid a test-and-clear because NMIs do not call this */
 134                 clear_thread_local_flags(_TLF_NAPPING);
 135                 regs_set_return_ip(regs, (unsigned long)power4_idle_nap_return);
 136         }
 137 #endif
 138 }
 139
 140 static inline void booke_restore_dbcr0(void)
 141 {
 142 #ifdef CONFIG_PPC_ADV_DEBUG_REGS
 143         unsigned long dbcr0 = current->thread.debug.dbcr0;
 144
 145         if (IS_ENABLED(CONFIG_PPC32) && unlikely(dbcr0 & DBCR0_IDM)) {
 146                 mtspr(SPRN_DBSR, -1);
 147                 mtspr(SPRN_DBCR0, global_dbcr0[smp_processor_id()]);
 148         }
 149 #endif
 150 }
 151
 152 static inline void interrupt_enter_prepare(struct pt_regs *regs)
 153 {
 154 #ifdef CONFIG_PPC32
 155         if (!arch_irq_disabled_regs(regs))
 156                 trace_hardirqs_off();
 157
 158         if (user_mode(regs))
 159                 kuap_lock();
 160         else
 161                 kuap_save_and_lock(regs);
 162
 163         if (user_mode(regs))
 164                 account_cpu_user_entry();
 165 #endif
 166
 167 #ifdef CONFIG_PPC64
 168         bool trace_enable = false;
 169
 170         if (IS_ENABLED(CONFIG_TRACE_IRQFLAGS)) {
 171                 if (irq_soft_mask_set_return(IRQS_ALL_DISABLED) == IRQS_ENABLED)
 172                         trace_enable = true;
 173         } else {
 174                 irq_soft_mask_set(IRQS_ALL_DISABLED);
 175         }
 176
 177         /*
 178          * If the interrupt was taken with HARD_DIS clear, then enable MSR[EE].
 179          * Asynchronous interrupts get here with HARD_DIS set (see below), so
 180          * this enables MSR[EE] for synchronous interrupts. IRQs remain
 181          * soft-masked. The interrupt handler may later call
 182          * interrupt_cond_local_irq_enable() to achieve a regular process
 183          * context.
 184          */
 185         if (!(local_paca->irq_happened & PACA_IRQ_HARD_DIS)) {
 186                 INT_SOFT_MASK_BUG_ON(regs, !(regs->msr & MSR_EE));
 187                 __hard_irq_enable();
 188         } else {
 189                 __hard_RI_enable();
 190         }
 191
 192         /* Do this when RI=1 because it can cause SLB faults */
 193         if (trace_enable)
 194                 trace_hardirqs_off();
 195
 196         if (user_mode(regs)) {
 197                 kuap_lock();
 198                 CT_WARN_ON(ct_state() != CONTEXT_USER);
 199                 user_exit_irqoff();
 200
 201                 account_cpu_user_entry();
 202                 account_stolen_time();
 203         } else {
 204                 kuap_save_and_lock(regs);
 205                 /*
 206                  * CT_WARN_ON comes here via program_check_exception,
 207                  * so avoid recursion.
 208                  */
 209                 if (TRAP(regs) != INTERRUPT_PROGRAM)
 210                         CT_WARN_ON(ct_state() != CONTEXT_KERNEL &&
 211                                    ct_state() != CONTEXT_IDLE);
 212                 INT_SOFT_MASK_BUG_ON(regs, is_implicit_soft_masked(regs));
 213                 INT_SOFT_MASK_BUG_ON(regs, arch_irq_disabled_regs(regs) &&
 214                                            search_kernel_restart_table(regs->nip));
 215         }
 216         INT_SOFT_MASK_BUG_ON(regs, !arch_irq_disabled_regs(regs) &&
 217                                    !(regs->msr & MSR_EE));
 218 #endif
 219
 220         booke_restore_dbcr0();
 221 }
 222
 223 /*
 224  * Care should be taken to note that interrupt_exit_prepare and
 225  * interrupt_async_exit_prepare do not necessarily return immediately to
 226  * regs context (e.g., if regs is usermode, we don't necessarily return to
 227  * user mode). Other interrupts might be taken between here and return,
 228  * context switch / preemption may occur in the exit path after this, or a
 229  * signal may be delivered, etc.
 230  *
 231  * The real interrupt exit code is platform specific, e.g.,
 232  * interrupt_exit_user_prepare / interrupt_exit_kernel_prepare for 64s.
 233  *
 234  * However interrupt_nmi_exit_prepare does return directly to regs, because
 235  * NMIs do not do "exit work" or replay soft-masked interrupts.
 236  */
 237 static inline void interrupt_exit_prepare(struct pt_regs *regs)
 238 {
 239 }
 240
 241 static inline void interrupt_async_enter_prepare(struct pt_regs *regs)
 242 {
 243 #ifdef CONFIG_PPC64
 244         /* Ensure interrupt_enter_prepare does not enable MSR[EE] */
 245         local_paca->irq_happened |= PACA_IRQ_HARD_DIS;
 246 #endif
 247         interrupt_enter_prepare(regs);
 248 #ifdef CONFIG_PPC_BOOK3S_64
 249         /*
 250          * RI=1 is set by interrupt_enter_prepare, so this thread flags access
 251          * has to come afterward (it can cause SLB faults).
 252          */
 253         if (cpu_has_feature(CPU_FTR_CTRL) &&
 254             !test_thread_local_flags(_TLF_RUNLATCH))
 255                 __ppc64_runlatch_on();
 256 #endif
 257         irq_enter();
 258 }
 259
 260 static inline void interrupt_async_exit_prepare(struct pt_regs *regs)
 261 {
 262         /*
 263          * Adjust at exit so the main handler sees the true NIA. This must
 264          * come before irq_exit() because irq_exit can enable interrupts, and
 265          * if another interrupt is taken before nap_adjust_return has run
 266          * here, then that interrupt would return directly to idle nap return.
 267          */
 268         nap_adjust_return(regs);
 269
 270         irq_exit();
 271         interrupt_exit_prepare(regs);
 272 }
 273
 274 struct interrupt_nmi_state {
 275 #ifdef CONFIG_PPC64
 276         u8 irq_soft_mask;
 277         u8 irq_happened;
 278         u8 ftrace_enabled;
 279         u64 softe;
 280 #endif
 281 };
 282
 283 static inline bool nmi_disables_ftrace(struct pt_regs *regs)
 284 {
 285         /* Allow DEC and PMI to be traced when they are soft-NMI */
 286         if (IS_ENABLED(CONFIG_PPC_BOOK3S_64)) {
 287                 if (TRAP(regs) == INTERRUPT_DECREMENTER)
 288                        return false;
 289                 if (TRAP(regs) == INTERRUPT_PERFMON)
 290                        return false;
 291         }
 292         if (IS_ENABLED(CONFIG_PPC_BOOK3E_64)) {
 293                 if (TRAP(regs) == INTERRUPT_PERFMON)
 294                         return false;
 295         }
 296
 297         return true;
 298 }
 299
 300 static inline void interrupt_nmi_enter_prepare(struct pt_regs *regs, struct interrupt_nmi_state *state)
 301 {
 302 #ifdef CONFIG_PPC64
 303         state->irq_soft_mask = local_paca->irq_soft_mask;
 304         state->irq_happened = local_paca->irq_happened;
 305         state->softe = regs->softe;
 306
 307         /*
 308          * Set IRQS_ALL_DISABLED unconditionally so irqs_disabled() does
 309          * the right thing, and set IRQ_HARD_DIS. We do not want to reconcile
 310          * because that goes through irq tracing which we don't want in NMI.
 311          */
 312         local_paca->irq_soft_mask = IRQS_ALL_DISABLED;
 313         local_paca->irq_happened |= PACA_IRQ_HARD_DIS;
 314
 315         if (!(regs->msr & MSR_EE) || is_implicit_soft_masked(regs)) {
 316                 /*
 317                  * Adjust regs->softe to be soft-masked if it had not been
 318                  * reconcied (e.g., interrupt entry with MSR[EE]=0 but softe
 319                  * not yet set disabled), or if it was in an implicit soft
 320                  * masked state. This makes arch_irq_disabled_regs(regs)
 321                  * behave as expected.
 322                  */
 323                 regs->softe = IRQS_ALL_DISABLED;
 324         }
 325
 326         __hard_RI_enable();
 327
 328         /* Don't do any per-CPU operations until interrupt state is fixed */
 329
 330         if (nmi_disables_ftrace(regs)) {
 331                 state->ftrace_enabled = this_cpu_get_ftrace_enabled();
 332                 this_cpu_set_ftrace_enabled(0);
 333         }
 334 #endif
 335
 336         /* If data relocations are enabled, it's safe to use nmi_enter() */
 337         if (mfmsr() & MSR_DR) {
 338                 nmi_enter();
 339                 return;
 340         }
 341
 342         /*
 343          * But do not use nmi_enter() for pseries hash guest taking a real-mode
 344          * NMI because not everything it touches is within the RMA limit.
 345          */
 346         if (IS_ENABLED(CONFIG_PPC_BOOK3S_64) &&
 347             firmware_has_feature(FW_FEATURE_LPAR) &&
 348             !radix_enabled())
 349                 return;
 350
 351         /*
 352          * Likewise, don't use it if we have some form of instrumentation (like
 353          * KASAN shadow) that is not safe to access in real mode (even on radix)
 354          */
 355         if (IS_ENABLED(CONFIG_KASAN))
 356                 return;
 357
 358         /* Otherwise, it should be safe to call it */
 359         nmi_enter();
 360 }
 361
 362 static inline void interrupt_nmi_exit_prepare(struct pt_regs *regs, struct interrupt_nmi_state *state)
 363 {
 364         if (mfmsr() & MSR_DR) {
 365                 // nmi_exit if relocations are on
 366                 nmi_exit();
 367         } else if (IS_ENABLED(CONFIG_PPC_BOOK3S_64) &&
 368                    firmware_has_feature(FW_FEATURE_LPAR) &&
 369                    !radix_enabled()) {
 370                 // no nmi_exit for a pseries hash guest taking a real mode exception
 371         } else if (IS_ENABLED(CONFIG_KASAN)) {
 372                 // no nmi_exit for KASAN in real mode
 373         } else {
 374                 nmi_exit();
 375         }
 376
 377         /*
 378          * nmi does not call nap_adjust_return because nmi should not create
 379          * new work to do (must use irq_work for that).
 380          */
 381
 382 #ifdef CONFIG_PPC64
 383 #ifdef CONFIG_PPC_BOOK3S
 384         if (arch_irq_disabled_regs(regs)) {
 385                 unsigned long rst = search_kernel_restart_table(regs->nip);
 386                 if (rst)
 387                         regs_set_return_ip(regs, rst);
 388         }
 389 #endif
 390
 391         if (nmi_disables_ftrace(regs))
 392                 this_cpu_set_ftrace_enabled(state->ftrace_enabled);
 393
 394         /* Check we didn't change the pending interrupt mask. */
 395         WARN_ON_ONCE((state->irq_happened | PACA_IRQ_HARD_DIS) != local_paca->irq_happened);
 396         regs->softe = state->softe;
 397         local_paca->irq_happened = state->irq_happened;
 398         local_paca->irq_soft_mask = state->irq_soft_mask;
 399 #endif
 400 }
 401
 402 /*
 403  * Don't use noinstr here like x86, but rather add NOKPROBE_SYMBOL to each
 404  * function definition. The reason for this is the noinstr section is placed
 405  * after the main text section, i.e., very far away from the interrupt entry
 406  * asm. That creates problems with fitting linker stubs when building large
 407  * kernels.
 408  */
 409 #define interrupt_handler __visible noinline notrace __no_kcsan __no_sanitize_address
 410
 411 /**
 412  * DECLARE_INTERRUPT_HANDLER_RAW - Declare raw interrupt handler function
 413  * @func:       Function name of the entry point
 414  * @returns:    Returns a value back to asm caller
 415  */
 416 #define DECLARE_INTERRUPT_HANDLER_RAW(func)                             \
 417         __visible long func(struct pt_regs *regs)
 418
 419 /**
 420  * DEFINE_INTERRUPT_HANDLER_RAW - Define raw interrupt handler function
 421  * @func:       Function name of the entry point
 422  * @returns:    Returns a value back to asm caller
 423  *
 424  * @func is called from ASM entry code.
 425  *
 426  * This is a plain function which does no tracing, reconciling, etc.
 427  * The macro is written so it acts as function definition. Append the
 428  * body with a pair of curly brackets.
 429  *
 430  * raw interrupt handlers must not enable or disable interrupts, or
 431  * schedule, tracing and instrumentation (ftrace, lockdep, etc) would
 432  * not be advisable either, although may be possible in a pinch, the
 433  * trace will look odd at least.
 434  *
 435  * A raw handler may call one of the other interrupt handler functions
 436  * to be converted into that interrupt context without these restrictions.
 437  *
 438  * On PPC64, _RAW handlers may return with fast_interrupt_return.
 439  *
 440  * Specific handlers may have additional restrictions.
 441  */
 442 #define DEFINE_INTERRUPT_HANDLER_RAW(func)                              \
 443 static __always_inline __no_sanitize_address __no_kcsan long            \
 444 ____##func(struct pt_regs *regs);                                       \
 445                                                                         \
 446 interrupt_handler long func(struct pt_regs *regs)                       \
 447 {                                                                       \
 448         long ret;                                                       \
 449                                                                         \
 450         __hard_RI_enable();                                             \
 451                                                                         \
 452         ret = ____##func (regs);                                        \
 453                                                                         \
 454         return ret;                                                     \
 455 }                                                                       \
 456 NOKPROBE_SYMBOL(func);                                                  \
 457                                                                         \
 458 static __always_inline __no_sanitize_address __no_kcsan long            \
 459 ____##func(struct pt_regs *regs)
 460
 461 /**
 462  * DECLARE_INTERRUPT_HANDLER - Declare synchronous interrupt handler function
 463  * @func:       Function name of the entry point
 464  */
 465 #define DECLARE_INTERRUPT_HANDLER(func)                                 \
 466         __visible void func(struct pt_regs *regs)
 467
 468 /**
 469  * DEFINE_INTERRUPT_HANDLER - Define synchronous interrupt handler function
 470  * @func:       Function name of the entry point
 471  *
 472  * @func is called from ASM entry code.
 473  *
 474  * The macro is written so it acts as function definition. Append the
 475  * body with a pair of curly brackets.
 476  */
 477 #define DEFINE_INTERRUPT_HANDLER(func)                                  \
 478 static __always_inline void ____##func(struct pt_regs *regs);           \
 479                                                                         \
 480 interrupt_handler void func(struct pt_regs *regs)                       \
 481 {                                                                       \
 482         interrupt_enter_prepare(regs);                                  \
 483                                                                         \
 484         ____##func (regs);                                              \
 485                                                                         \
 486         interrupt_exit_prepare(regs);                                   \
 487 }                                                                       \
 488 NOKPROBE_SYMBOL(func);                                                  \
 489                                                                         \
 490 static __always_inline void ____##func(struct pt_regs *regs)
 491
 492 /**
 493  * DECLARE_INTERRUPT_HANDLER_RET - Declare synchronous interrupt handler function
 494  * @func:       Function name of the entry point
 495  * @returns:    Returns a value back to asm caller
 496  */
 497 #define DECLARE_INTERRUPT_HANDLER_RET(func)                             \
 498         __visible long func(struct pt_regs *regs)
 499
 500 /**
 501  * DEFINE_INTERRUPT_HANDLER_RET - Define synchronous interrupt handler function
 502  * @func:       Function name of the entry point
 503  * @returns:    Returns a value back to asm caller
 504  *
 505  * @func is called from ASM entry code.
 506  *
 507  * The macro is written so it acts as function definition. Append the
 508  * body with a pair of curly brackets.
 509  */
 510 #define DEFINE_INTERRUPT_HANDLER_RET(func)                              \
 511 static __always_inline long ____##func(struct pt_regs *regs);           \
 512                                                                         \
 513 interrupt_handler long func(struct pt_regs *regs)                       \
 514 {                                                                       \
 515         long ret;                                                       \
 516                                                                         \
 517         interrupt_enter_prepare(regs);                                  \
 518                                                                         \
 519         ret = ____##func (regs);                                        \
 520                                                                         \
 521         interrupt_exit_prepare(regs);                                   \
 522                                                                         \
 523         return ret;                                                     \
 524 }                                                                       \
 525 NOKPROBE_SYMBOL(func);                                                  \
 526                                                                         \
 527 static __always_inline long ____##func(struct pt_regs *regs)
 528
 529 /**
 530  * DECLARE_INTERRUPT_HANDLER_ASYNC - Declare asynchronous interrupt handler function
 531  * @func:       Function name of the entry point
 532  */
 533 #define DECLARE_INTERRUPT_HANDLER_ASYNC(func)                           \
 534         __visible void func(struct pt_regs *regs)
 535
 536 /**
 537  * DEFINE_INTERRUPT_HANDLER_ASYNC - Define asynchronous interrupt handler function
 538  * @func:       Function name of the entry point
 539  *
 540  * @func is called from ASM entry code.
 541  *
 542  * The macro is written so it acts as function definition. Append the
 543  * body with a pair of curly brackets.
 544  */
 545 #define DEFINE_INTERRUPT_HANDLER_ASYNC(func)                            \
 546 static __always_inline void ____##func(struct pt_regs *regs);           \
 547                                                                         \
 548 interrupt_handler void func(struct pt_regs *regs)                       \
 549 {                                                                       \
 550         interrupt_async_enter_prepare(regs);                            \
 551                                                                         \
 552         ____##func (regs);                                              \
 553                                                                         \
 554         interrupt_async_exit_prepare(regs);                             \
 555 }                                                                       \
 556 NOKPROBE_SYMBOL(func);                                                  \
 557                                                                         \
 558 static __always_inline void ____##func(struct pt_regs *regs)
 559
 560 /**
 561  * DECLARE_INTERRUPT_HANDLER_NMI - Declare NMI interrupt handler function
 562  * @func:       Function name of the entry point
 563  * @returns:    Returns a value back to asm caller
 564  */
 565 #define DECLARE_INTERRUPT_HANDLER_NMI(func)                             \
 566         __visible long func(struct pt_regs *regs)
 567
 568 /**
 569  * DEFINE_INTERRUPT_HANDLER_NMI - Define NMI interrupt handler function
 570  * @func:       Function name of the entry point
 571  * @returns:    Returns a value back to asm caller
 572  *
 573  * @func is called from ASM entry code.
 574  *
 575  * The macro is written so it acts as function definition. Append the
 576  * body with a pair of curly brackets.
 577  */
 578 #define DEFINE_INTERRUPT_HANDLER_NMI(func)                              \
 579 static __always_inline __no_sanitize_address __no_kcsan long            \
 580 ____##func(struct pt_regs *regs);                                       \
 581                                                                         \
 582 interrupt_handler long func(struct pt_regs *regs)                       \
 583 {                                                                       \
 584         struct interrupt_nmi_state state;                               \
 585         long ret;                                                       \
 586                                                                         \
 587         interrupt_nmi_enter_prepare(regs, &state);                      \
 588                                                                         \
 589         ret = ____##func (regs);                                        \
 590                                                                         \
 591         interrupt_nmi_exit_prepare(regs, &state);                       \
 592                                                                         \
 593         return ret;                                                     \
 594 }                                                                       \
 595 NOKPROBE_SYMBOL(func);                                                  \
 596                                                                         \
 597 static __always_inline  __no_sanitize_address __no_kcsan long           \
 598 ____##func(struct pt_regs *regs)
 599
 600
 601 /* Interrupt handlers */
 602 /* kernel/traps.c */
 603 DECLARE_INTERRUPT_HANDLER_NMI(system_reset_exception);
 604 #ifdef CONFIG_PPC_BOOK3S_64
 605 DECLARE_INTERRUPT_HANDLER_RAW(machine_check_early_boot);
 606 DECLARE_INTERRUPT_HANDLER_ASYNC(machine_check_exception_async);
 607 #endif
 608 DECLARE_INTERRUPT_HANDLER_NMI(machine_check_exception);
 609 DECLARE_INTERRUPT_HANDLER(SMIException);
 610 DECLARE_INTERRUPT_HANDLER(handle_hmi_exception);
 611 DECLARE_INTERRUPT_HANDLER(unknown_exception);
 612 DECLARE_INTERRUPT_HANDLER_ASYNC(unknown_async_exception);
 613 DECLARE_INTERRUPT_HANDLER_NMI(unknown_nmi_exception);
 614 DECLARE_INTERRUPT_HANDLER(instruction_breakpoint_exception);
 615 DECLARE_INTERRUPT_HANDLER(RunModeException);
 616 DECLARE_INTERRUPT_HANDLER(single_step_exception);
 617 DECLARE_INTERRUPT_HANDLER(program_check_exception);
 618 DECLARE_INTERRUPT_HANDLER(emulation_assist_interrupt);
 619 DECLARE_INTERRUPT_HANDLER(alignment_exception);
 620 DECLARE_INTERRUPT_HANDLER(StackOverflow);
 621 DECLARE_INTERRUPT_HANDLER(stack_overflow_exception);
 622 DECLARE_INTERRUPT_HANDLER(kernel_fp_unavailable_exception);
 623 DECLARE_INTERRUPT_HANDLER(altivec_unavailable_exception);
 624 DECLARE_INTERRUPT_HANDLER(vsx_unavailable_exception);
 625 DECLARE_INTERRUPT_HANDLER(facility_unavailable_exception);
 626 DECLARE_INTERRUPT_HANDLER(fp_unavailable_tm);
 627 DECLARE_INTERRUPT_HANDLER(altivec_unavailable_tm);
 628 DECLARE_INTERRUPT_HANDLER(vsx_unavailable_tm);
 629 DECLARE_INTERRUPT_HANDLER_NMI(performance_monitor_exception_nmi);
 630 DECLARE_INTERRUPT_HANDLER_ASYNC(performance_monitor_exception_async);
 631 DECLARE_INTERRUPT_HANDLER_RAW(performance_monitor_exception);
 632 DECLARE_INTERRUPT_HANDLER(DebugException);
 633 DECLARE_INTERRUPT_HANDLER(altivec_assist_exception);
 634 DECLARE_INTERRUPT_HANDLER(CacheLockingException);
 635 DECLARE_INTERRUPT_HANDLER(SPEFloatingPointException);
 636 DECLARE_INTERRUPT_HANDLER(SPEFloatingPointRoundException);
 637 DECLARE_INTERRUPT_HANDLER_NMI(WatchdogException);
 638 DECLARE_INTERRUPT_HANDLER(kernel_bad_stack);
 639
 640 /* slb.c */
 641 DECLARE_INTERRUPT_HANDLER_RAW(do_slb_fault);
 642 DECLARE_INTERRUPT_HANDLER(do_bad_segment_interrupt);
 643
 644 /* hash_utils.c */
 645 DECLARE_INTERRUPT_HANDLER(do_hash_fault);
 646
 647 /* fault.c */
 648 DECLARE_INTERRUPT_HANDLER(do_page_fault);
 649 DECLARE_INTERRUPT_HANDLER(do_bad_page_fault_segv);
 650
 651 /* process.c */
 652 DECLARE_INTERRUPT_HANDLER(do_break);
 653
 654 /* time.c */
 655 DECLARE_INTERRUPT_HANDLER_ASYNC(timer_interrupt);
 656
 657 /* mce.c */
 658 DECLARE_INTERRUPT_HANDLER_NMI(machine_check_early);
 659 DECLARE_INTERRUPT_HANDLER_NMI(hmi_exception_realmode);
 660
 661 DECLARE_INTERRUPT_HANDLER_ASYNC(TAUException);
 662
 663 /* irq.c */
 664 DECLARE_INTERRUPT_HANDLER_ASYNC(do_IRQ);
 665
 666 void __noreturn unrecoverable_exception(struct pt_regs *regs);
 667
 668 void replay_system_reset(void);
 669 void replay_soft_interrupts(void);
 670
 671 static inline void interrupt_cond_local_irq_enable(struct pt_regs *regs)
 672 {
 673         if (!arch_irq_disabled_regs(regs))
 674                 local_irq_enable();
 675 }
 676
 677 long system_call_exception(struct pt_regs *regs, unsigned long r0);
 678 notrace unsigned long syscall_exit_prepare(unsigned long r3, struct pt_regs *regs, long scv);
 679 notrace unsigned long interrupt_exit_user_prepare(struct pt_regs *regs);
 680 notrace unsigned long interrupt_exit_kernel_prepare(struct pt_regs *regs);
 681 #ifdef CONFIG_PPC64
 682 unsigned long syscall_exit_restart(unsigned long r3, struct pt_regs *regs);
 683 unsigned long interrupt_exit_user_restart(struct pt_regs *regs);
 684 unsigned long interrupt_exit_kernel_restart(struct pt_regs *regs);
 685 #endif
 686
 687 #endif /* __ASSEMBLY__ */
 688
 689 #endif /* _ASM_POWERPC_INTERRUPT_H */