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 /* 328 * Do not use nmi_enter() for pseries hash guest taking a real-mode 329 * NMI because not everything it touches is within the RMA limit. 330 */ 331 if (!IS_ENABLED(CONFIG_PPC_BOOK3S_64) || 332 !firmware_has_feature(FW_FEATURE_LPAR) || 333 radix_enabled() || (mfmsr() & MSR_DR)) 334 nmi_enter(); 335 } 336 337 static inline void interrupt_nmi_exit_prepare(struct pt_regs *regs, struct interrupt_nmi_state *state) 338 { 339 if (!IS_ENABLED(CONFIG_PPC_BOOK3S_64) || 340 !firmware_has_feature(FW_FEATURE_LPAR) || 341 radix_enabled() || (mfmsr() & MSR_DR)) 342 nmi_exit(); 343 344 /* 345 * nmi does not call nap_adjust_return because nmi should not create 346 * new work to do (must use irq_work for that). 347 */ 348 349 #ifdef CONFIG_PPC64 350 #ifdef CONFIG_PPC_BOOK3S 351 if (arch_irq_disabled_regs(regs)) { 352 unsigned long rst = search_kernel_restart_table(regs->nip); 353 if (rst) 354 regs_set_return_ip(regs, rst); 355 } 356 #endif 357 358 if (nmi_disables_ftrace(regs)) 359 this_cpu_set_ftrace_enabled(state->ftrace_enabled); 360 361 /* Check we didn't change the pending interrupt mask. */ 362 WARN_ON_ONCE((state->irq_happened | PACA_IRQ_HARD_DIS) != local_paca->irq_happened); 363 regs->softe = state->softe; 364 local_paca->irq_happened = state->irq_happened; 365 local_paca->irq_soft_mask = state->irq_soft_mask; 366 #endif 367 } 368 369 /* 370 * Don't use noinstr here like x86, but rather add NOKPROBE_SYMBOL to each 371 * function definition. The reason for this is the noinstr section is placed 372 * after the main text section, i.e., very far away from the interrupt entry 373 * asm. That creates problems with fitting linker stubs when building large 374 * kernels. 375 */ 376 #define interrupt_handler __visible noinline notrace __no_kcsan __no_sanitize_address 377 378 /** 379 * DECLARE_INTERRUPT_HANDLER_RAW - Declare raw interrupt handler function 380 * @func: Function name of the entry point 381 * @returns: Returns a value back to asm caller 382 */ 383 #define DECLARE_INTERRUPT_HANDLER_RAW(func) \ 384 __visible long func(struct pt_regs *regs) 385 386 /** 387 * DEFINE_INTERRUPT_HANDLER_RAW - Define raw interrupt handler function 388 * @func: Function name of the entry point 389 * @returns: Returns a value back to asm caller 390 * 391 * @func is called from ASM entry code. 392 * 393 * This is a plain function which does no tracing, reconciling, etc. 394 * The macro is written so it acts as function definition. Append the 395 * body with a pair of curly brackets. 396 * 397 * raw interrupt handlers must not enable or disable interrupts, or 398 * schedule, tracing and instrumentation (ftrace, lockdep, etc) would 399 * not be advisable either, although may be possible in a pinch, the 400 * trace will look odd at least. 401 * 402 * A raw handler may call one of the other interrupt handler functions 403 * to be converted into that interrupt context without these restrictions. 404 * 405 * On PPC64, _RAW handlers may return with fast_interrupt_return. 406 * 407 * Specific handlers may have additional restrictions. 408 */ 409 #define DEFINE_INTERRUPT_HANDLER_RAW(func) \ 410 static __always_inline long ____##func(struct pt_regs *regs); \ 411 \ 412 interrupt_handler long func(struct pt_regs *regs) \ 413 { \ 414 long ret; \ 415 \ 416 __hard_RI_enable(); \ 417 \ 418 ret = ____##func (regs); \ 419 \ 420 return ret; \ 421 } \ 422 NOKPROBE_SYMBOL(func); \ 423 \ 424 static __always_inline long ____##func(struct pt_regs *regs) 425 426 /** 427 * DECLARE_INTERRUPT_HANDLER - Declare synchronous interrupt handler function 428 * @func: Function name of the entry point 429 */ 430 #define DECLARE_INTERRUPT_HANDLER(func) \ 431 __visible void func(struct pt_regs *regs) 432 433 /** 434 * DEFINE_INTERRUPT_HANDLER - Define synchronous interrupt handler function 435 * @func: Function name of the entry point 436 * 437 * @func is called from ASM entry code. 438 * 439 * The macro is written so it acts as function definition. Append the 440 * body with a pair of curly brackets. 441 */ 442 #define DEFINE_INTERRUPT_HANDLER(func) \ 443 static __always_inline void ____##func(struct pt_regs *regs); \ 444 \ 445 interrupt_handler void func(struct pt_regs *regs) \ 446 { \ 447 interrupt_enter_prepare(regs); \ 448 \ 449 ____##func (regs); \ 450 \ 451 interrupt_exit_prepare(regs); \ 452 } \ 453 NOKPROBE_SYMBOL(func); \ 454 \ 455 static __always_inline void ____##func(struct pt_regs *regs) 456 457 /** 458 * DECLARE_INTERRUPT_HANDLER_RET - Declare synchronous interrupt handler function 459 * @func: Function name of the entry point 460 * @returns: Returns a value back to asm caller 461 */ 462 #define DECLARE_INTERRUPT_HANDLER_RET(func) \ 463 __visible long func(struct pt_regs *regs) 464 465 /** 466 * DEFINE_INTERRUPT_HANDLER_RET - Define synchronous interrupt handler function 467 * @func: Function name of the entry point 468 * @returns: Returns a value back to asm caller 469 * 470 * @func is called from ASM entry code. 471 * 472 * The macro is written so it acts as function definition. Append the 473 * body with a pair of curly brackets. 474 */ 475 #define DEFINE_INTERRUPT_HANDLER_RET(func) \ 476 static __always_inline long ____##func(struct pt_regs *regs); \ 477 \ 478 interrupt_handler long func(struct pt_regs *regs) \ 479 { \ 480 long ret; \ 481 \ 482 interrupt_enter_prepare(regs); \ 483 \ 484 ret = ____##func (regs); \ 485 \ 486 interrupt_exit_prepare(regs); \ 487 \ 488 return ret; \ 489 } \ 490 NOKPROBE_SYMBOL(func); \ 491 \ 492 static __always_inline long ____##func(struct pt_regs *regs) 493 494 /** 495 * DECLARE_INTERRUPT_HANDLER_ASYNC - Declare asynchronous interrupt handler function 496 * @func: Function name of the entry point 497 */ 498 #define DECLARE_INTERRUPT_HANDLER_ASYNC(func) \ 499 __visible void func(struct pt_regs *regs) 500 501 /** 502 * DEFINE_INTERRUPT_HANDLER_ASYNC - Define asynchronous interrupt handler function 503 * @func: Function name of the entry point 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_ASYNC(func) \ 511 static __always_inline void ____##func(struct pt_regs *regs); \ 512 \ 513 interrupt_handler void func(struct pt_regs *regs) \ 514 { \ 515 interrupt_async_enter_prepare(regs); \ 516 \ 517 ____##func (regs); \ 518 \ 519 interrupt_async_exit_prepare(regs); \ 520 } \ 521 NOKPROBE_SYMBOL(func); \ 522 \ 523 static __always_inline void ____##func(struct pt_regs *regs) 524 525 /** 526 * DECLARE_INTERRUPT_HANDLER_NMI - Declare NMI interrupt handler function 527 * @func: Function name of the entry point 528 * @returns: Returns a value back to asm caller 529 */ 530 #define DECLARE_INTERRUPT_HANDLER_NMI(func) \ 531 __visible long func(struct pt_regs *regs) 532 533 /** 534 * DEFINE_INTERRUPT_HANDLER_NMI - Define NMI interrupt handler function 535 * @func: Function name of the entry point 536 * @returns: Returns a value back to asm caller 537 * 538 * @func is called from ASM entry code. 539 * 540 * The macro is written so it acts as function definition. Append the 541 * body with a pair of curly brackets. 542 */ 543 #define DEFINE_INTERRUPT_HANDLER_NMI(func) \ 544 static __always_inline long ____##func(struct pt_regs *regs); \ 545 \ 546 interrupt_handler long func(struct pt_regs *regs) \ 547 { \ 548 struct interrupt_nmi_state state; \ 549 long ret; \ 550 \ 551 interrupt_nmi_enter_prepare(regs, &state); \ 552 \ 553 ret = ____##func (regs); \ 554 \ 555 interrupt_nmi_exit_prepare(regs, &state); \ 556 \ 557 return ret; \ 558 } \ 559 NOKPROBE_SYMBOL(func); \ 560 \ 561 static __always_inline long ____##func(struct pt_regs *regs) 562 563 564 /* Interrupt handlers */ 565 /* kernel/traps.c */ 566 DECLARE_INTERRUPT_HANDLER_NMI(system_reset_exception); 567 #ifdef CONFIG_PPC_BOOK3S_64 568 DECLARE_INTERRUPT_HANDLER_ASYNC(machine_check_exception_async); 569 #endif 570 DECLARE_INTERRUPT_HANDLER_NMI(machine_check_exception); 571 DECLARE_INTERRUPT_HANDLER(SMIException); 572 DECLARE_INTERRUPT_HANDLER(handle_hmi_exception); 573 DECLARE_INTERRUPT_HANDLER(unknown_exception); 574 DECLARE_INTERRUPT_HANDLER_ASYNC(unknown_async_exception); 575 DECLARE_INTERRUPT_HANDLER_NMI(unknown_nmi_exception); 576 DECLARE_INTERRUPT_HANDLER(instruction_breakpoint_exception); 577 DECLARE_INTERRUPT_HANDLER(RunModeException); 578 DECLARE_INTERRUPT_HANDLER(single_step_exception); 579 DECLARE_INTERRUPT_HANDLER(program_check_exception); 580 DECLARE_INTERRUPT_HANDLER(emulation_assist_interrupt); 581 DECLARE_INTERRUPT_HANDLER(alignment_exception); 582 DECLARE_INTERRUPT_HANDLER(StackOverflow); 583 DECLARE_INTERRUPT_HANDLER(stack_overflow_exception); 584 DECLARE_INTERRUPT_HANDLER(kernel_fp_unavailable_exception); 585 DECLARE_INTERRUPT_HANDLER(altivec_unavailable_exception); 586 DECLARE_INTERRUPT_HANDLER(vsx_unavailable_exception); 587 DECLARE_INTERRUPT_HANDLER(facility_unavailable_exception); 588 DECLARE_INTERRUPT_HANDLER(fp_unavailable_tm); 589 DECLARE_INTERRUPT_HANDLER(altivec_unavailable_tm); 590 DECLARE_INTERRUPT_HANDLER(vsx_unavailable_tm); 591 DECLARE_INTERRUPT_HANDLER_NMI(performance_monitor_exception_nmi); 592 DECLARE_INTERRUPT_HANDLER_ASYNC(performance_monitor_exception_async); 593 DECLARE_INTERRUPT_HANDLER_RAW(performance_monitor_exception); 594 DECLARE_INTERRUPT_HANDLER(DebugException); 595 DECLARE_INTERRUPT_HANDLER(altivec_assist_exception); 596 DECLARE_INTERRUPT_HANDLER(CacheLockingException); 597 DECLARE_INTERRUPT_HANDLER(SPEFloatingPointException); 598 DECLARE_INTERRUPT_HANDLER(SPEFloatingPointRoundException); 599 DECLARE_INTERRUPT_HANDLER_NMI(WatchdogException); 600 DECLARE_INTERRUPT_HANDLER(kernel_bad_stack); 601 602 /* slb.c */ 603 DECLARE_INTERRUPT_HANDLER_RAW(do_slb_fault); 604 DECLARE_INTERRUPT_HANDLER(do_bad_segment_interrupt); 605 606 /* hash_utils.c */ 607 DECLARE_INTERRUPT_HANDLER(do_hash_fault); 608 609 /* fault.c */ 610 DECLARE_INTERRUPT_HANDLER(do_page_fault); 611 DECLARE_INTERRUPT_HANDLER(do_bad_page_fault_segv); 612 613 /* process.c */ 614 DECLARE_INTERRUPT_HANDLER(do_break); 615 616 /* time.c */ 617 DECLARE_INTERRUPT_HANDLER_ASYNC(timer_interrupt); 618 619 /* mce.c */ 620 DECLARE_INTERRUPT_HANDLER_NMI(machine_check_early); 621 DECLARE_INTERRUPT_HANDLER_NMI(hmi_exception_realmode); 622 623 DECLARE_INTERRUPT_HANDLER_ASYNC(TAUException); 624 625 /* irq.c */ 626 DECLARE_INTERRUPT_HANDLER_ASYNC(do_IRQ); 627 628 void __noreturn unrecoverable_exception(struct pt_regs *regs); 629 630 void replay_system_reset(void); 631 void replay_soft_interrupts(void); 632 633 static inline void interrupt_cond_local_irq_enable(struct pt_regs *regs) 634 { 635 if (!arch_irq_disabled_regs(regs)) 636 local_irq_enable(); 637 } 638 639 long system_call_exception(long r3, long r4, long r5, long r6, long r7, long r8, 640 unsigned long r0, struct pt_regs *regs); 641 notrace unsigned long syscall_exit_prepare(unsigned long r3, struct pt_regs *regs, long scv); 642 notrace unsigned long interrupt_exit_user_prepare(struct pt_regs *regs); 643 notrace unsigned long interrupt_exit_kernel_prepare(struct pt_regs *regs); 644 #ifdef CONFIG_PPC64 645 unsigned long syscall_exit_restart(unsigned long r3, struct pt_regs *regs); 646 unsigned long interrupt_exit_user_restart(struct pt_regs *regs); 647 unsigned long interrupt_exit_kernel_restart(struct pt_regs *regs); 648 #endif 649 650 #endif /* __ASSEMBLY__ */ 651 652 #endif /* _ASM_POWERPC_INTERRUPT_H */ 653