1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 #ifndef _ASM_POWERPC_INTERRUPT_H
3 #define _ASM_POWERPC_INTERRUPT_H
4
5 /* BookE/4xx */
6 #define INTERRUPT_CRITICAL_INPUT 0x100
7
8 /* BookE */
9 #define INTERRUPT_DEBUG 0xd00
10 #ifdef CONFIG_BOOKE
11 #define INTERRUPT_PERFMON 0x260
12 #define INTERRUPT_DOORBELL 0x280
13 #endif
14
15 /* BookS/4xx/8xx */
16 #define INTERRUPT_MACHINE_CHECK 0x200
17
18 /* BookS/8xx */
19 #define INTERRUPT_SYSTEM_RESET 0x100
20
21 /* BookS */
22 #define INTERRUPT_DATA_SEGMENT 0x380
23 #define INTERRUPT_INST_SEGMENT 0x480
24 #define INTERRUPT_TRACE 0xd00
25 #define INTERRUPT_H_DATA_STORAGE 0xe00
26 #define INTERRUPT_HMI 0xe60
27 #define INTERRUPT_H_FAC_UNAVAIL 0xf80
28 #ifdef CONFIG_PPC_BOOK3S
29 #define INTERRUPT_DOORBELL 0xa00
30 #define INTERRUPT_PERFMON 0xf00
31 #define INTERRUPT_ALTIVEC_UNAVAIL 0xf20
32 #endif
33
34 /* BookE/BookS/4xx/8xx */
35 #define INTERRUPT_DATA_STORAGE 0x300
36 #define INTERRUPT_INST_STORAGE 0x400
37 #define INTERRUPT_EXTERNAL 0x500
38 #define INTERRUPT_ALIGNMENT 0x600
39 #define INTERRUPT_PROGRAM 0x700
40 #define INTERRUPT_SYSCALL 0xc00
41 #define INTERRUPT_TRACE 0xd00
42
43 /* BookE/BookS/44x */
44 #define INTERRUPT_FP_UNAVAIL 0x800
45
46 /* BookE/BookS/44x/8xx */
47 #define INTERRUPT_DECREMENTER 0x900
48
49 #ifndef INTERRUPT_PERFMON
50 #define INTERRUPT_PERFMON 0x0
51 #endif
52
53 /* 8xx */
54 #define INTERRUPT_SOFT_EMU_8xx 0x1000
55 #define INTERRUPT_INST_TLB_MISS_8xx 0x1100
56 #define INTERRUPT_DATA_TLB_MISS_8xx 0x1200
57 #define INTERRUPT_INST_TLB_ERROR_8xx 0x1300
58 #define INTERRUPT_DATA_TLB_ERROR_8xx 0x1400
59 #define INTERRUPT_DATA_BREAKPOINT_8xx 0x1c00
60 #define INTERRUPT_INST_BREAKPOINT_8xx 0x1d00
61
62 /* 603 */
63 #define INTERRUPT_INST_TLB_MISS_603 0x1000
64 #define INTERRUPT_DATA_LOAD_TLB_MISS_603 0x1100
65 #define INTERRUPT_DATA_STORE_TLB_MISS_603 0x1200
66
67 #ifndef __ASSEMBLY__
68
69 #include <linux/context_tracking.h>
70 #include <linux/hardirq.h>
71 #include <asm/cputime.h>
72 #include <asm/firmware.h>
73 #include <asm/ftrace.h>
74 #include <asm/kprobes.h>
75 #include <asm/runlatch.h>
76
77 #ifdef CONFIG_PPC_IRQ_SOFT_MASK_DEBUG
78 /*
79 * WARN/BUG is handled with a program interrupt so minimise checks here to
80 * avoid recursion and maximise the chance of getting the first oops handled.
81 */
82 #define INT_SOFT_MASK_BUG_ON(regs, cond) \
83 do { \
84 if ((user_mode(regs) || (TRAP(regs) != INTERRUPT_PROGRAM))) \
85 BUG_ON(cond); \
86 } while (0)
87 #else
88 #define INT_SOFT_MASK_BUG_ON(regs, cond)
89 #endif
90
91 #ifdef CONFIG_PPC_BOOK3S_64
92 extern char __end_soft_masked[];
93 bool search_kernel_soft_mask_table(unsigned long addr);
94 unsigned long search_kernel_restart_table(unsigned long addr);
95
96 DECLARE_STATIC_KEY_FALSE(interrupt_exit_not_reentrant);
97
is_implicit_soft_masked(struct pt_regs * regs)98 static inline bool is_implicit_soft_masked(struct pt_regs *regs)
99 {
100 if (regs->msr & MSR_PR)
101 return false;
102
103 if (regs->nip >= (unsigned long)__end_soft_masked)
104 return false;
105
106 return search_kernel_soft_mask_table(regs->nip);
107 }
108
srr_regs_clobbered(void)109 static inline void srr_regs_clobbered(void)
110 {
111 local_paca->srr_valid = 0;
112 local_paca->hsrr_valid = 0;
113 }
114 #else
search_kernel_restart_table(unsigned long addr)115 static inline unsigned long search_kernel_restart_table(unsigned long addr)
116 {
117 return 0;
118 }
119
is_implicit_soft_masked(struct pt_regs * regs)120 static inline bool is_implicit_soft_masked(struct pt_regs *regs)
121 {
122 return false;
123 }
124
srr_regs_clobbered(void)125 static inline void srr_regs_clobbered(void)
126 {
127 }
128 #endif
129
nap_adjust_return(struct pt_regs * regs)130 static inline void nap_adjust_return(struct pt_regs *regs)
131 {
132 #ifdef CONFIG_PPC_970_NAP
133 if (unlikely(test_thread_local_flags(_TLF_NAPPING))) {
134 /* Can avoid a test-and-clear because NMIs do not call this */
135 clear_thread_local_flags(_TLF_NAPPING);
136 regs_set_return_ip(regs, (unsigned long)power4_idle_nap_return);
137 }
138 #endif
139 }
140
booke_restore_dbcr0(void)141 static inline void booke_restore_dbcr0(void)
142 {
143 #ifdef CONFIG_PPC_ADV_DEBUG_REGS
144 unsigned long dbcr0 = current->thread.debug.dbcr0;
145
146 if (IS_ENABLED(CONFIG_PPC32) && unlikely(dbcr0 & DBCR0_IDM)) {
147 mtspr(SPRN_DBSR, -1);
148 mtspr(SPRN_DBCR0, global_dbcr0[smp_processor_id()]);
149 }
150 #endif
151 }
152
interrupt_enter_prepare(struct pt_regs * regs)153 static inline void interrupt_enter_prepare(struct pt_regs *regs)
154 {
155 #ifdef CONFIG_PPC64
156 irq_soft_mask_set(IRQS_ALL_DISABLED);
157
158 /*
159 * If the interrupt was taken with HARD_DIS clear, then enable MSR[EE].
160 * Asynchronous interrupts get here with HARD_DIS set (see below), so
161 * this enables MSR[EE] for synchronous interrupts. IRQs remain
162 * soft-masked. The interrupt handler may later call
163 * interrupt_cond_local_irq_enable() to achieve a regular process
164 * context.
165 */
166 if (!(local_paca->irq_happened & PACA_IRQ_HARD_DIS)) {
167 INT_SOFT_MASK_BUG_ON(regs, !(regs->msr & MSR_EE));
168 __hard_irq_enable();
169 } else {
170 __hard_RI_enable();
171 }
172 /* Enable MSR[RI] early, to support kernel SLB and hash faults */
173 #endif
174
175 if (!arch_irq_disabled_regs(regs))
176 trace_hardirqs_off();
177
178 if (user_mode(regs)) {
179 kuap_lock();
180 CT_WARN_ON(ct_state() != CONTEXT_USER);
181 user_exit_irqoff();
182
183 account_cpu_user_entry();
184 account_stolen_time();
185 } else {
186 kuap_save_and_lock(regs);
187 /*
188 * CT_WARN_ON comes here via program_check_exception,
189 * so avoid recursion.
190 */
191 if (TRAP(regs) != INTERRUPT_PROGRAM)
192 CT_WARN_ON(ct_state() != CONTEXT_KERNEL &&
193 ct_state() != CONTEXT_IDLE);
194 INT_SOFT_MASK_BUG_ON(regs, is_implicit_soft_masked(regs));
195 INT_SOFT_MASK_BUG_ON(regs, arch_irq_disabled_regs(regs) &&
196 search_kernel_restart_table(regs->nip));
197 }
198 INT_SOFT_MASK_BUG_ON(regs, !arch_irq_disabled_regs(regs) &&
199 !(regs->msr & MSR_EE));
200
201 booke_restore_dbcr0();
202 }
203
204 /*
205 * Care should be taken to note that interrupt_exit_prepare and
206 * interrupt_async_exit_prepare do not necessarily return immediately to
207 * regs context (e.g., if regs is usermode, we don't necessarily return to
208 * user mode). Other interrupts might be taken between here and return,
209 * context switch / preemption may occur in the exit path after this, or a
210 * signal may be delivered, etc.
211 *
212 * The real interrupt exit code is platform specific, e.g.,
213 * interrupt_exit_user_prepare / interrupt_exit_kernel_prepare for 64s.
214 *
215 * However interrupt_nmi_exit_prepare does return directly to regs, because
216 * NMIs do not do "exit work" or replay soft-masked interrupts.
217 */
interrupt_exit_prepare(struct pt_regs * regs)218 static inline void interrupt_exit_prepare(struct pt_regs *regs)
219 {
220 }
221
interrupt_async_enter_prepare(struct pt_regs * regs)222 static inline void interrupt_async_enter_prepare(struct pt_regs *regs)
223 {
224 #ifdef CONFIG_PPC64
225 /* Ensure interrupt_enter_prepare does not enable MSR[EE] */
226 local_paca->irq_happened |= PACA_IRQ_HARD_DIS;
227 #endif
228 interrupt_enter_prepare(regs);
229 #ifdef CONFIG_PPC_BOOK3S_64
230 /*
231 * RI=1 is set by interrupt_enter_prepare, so this thread flags access
232 * has to come afterward (it can cause SLB faults).
233 */
234 if (cpu_has_feature(CPU_FTR_CTRL) &&
235 !test_thread_local_flags(_TLF_RUNLATCH))
236 __ppc64_runlatch_on();
237 #endif
238 irq_enter();
239 }
240
interrupt_async_exit_prepare(struct pt_regs * regs)241 static inline void interrupt_async_exit_prepare(struct pt_regs *regs)
242 {
243 /*
244 * Adjust at exit so the main handler sees the true NIA. This must
245 * come before irq_exit() because irq_exit can enable interrupts, and
246 * if another interrupt is taken before nap_adjust_return has run
247 * here, then that interrupt would return directly to idle nap return.
248 */
249 nap_adjust_return(regs);
250
251 irq_exit();
252 interrupt_exit_prepare(regs);
253 }
254
255 struct interrupt_nmi_state {
256 #ifdef CONFIG_PPC64
257 u8 irq_soft_mask;
258 u8 irq_happened;
259 u8 ftrace_enabled;
260 u64 softe;
261 #endif
262 };
263
nmi_disables_ftrace(struct pt_regs * regs)264 static inline bool nmi_disables_ftrace(struct pt_regs *regs)
265 {
266 /* Allow DEC and PMI to be traced when they are soft-NMI */
267 if (IS_ENABLED(CONFIG_PPC_BOOK3S_64)) {
268 if (TRAP(regs) == INTERRUPT_DECREMENTER)
269 return false;
270 if (TRAP(regs) == INTERRUPT_PERFMON)
271 return false;
272 }
273 if (IS_ENABLED(CONFIG_PPC_BOOK3E_64)) {
274 if (TRAP(regs) == INTERRUPT_PERFMON)
275 return false;
276 }
277
278 return true;
279 }
280
interrupt_nmi_enter_prepare(struct pt_regs * regs,struct interrupt_nmi_state * state)281 static inline void interrupt_nmi_enter_prepare(struct pt_regs *regs, struct interrupt_nmi_state *state)
282 {
283 #ifdef CONFIG_PPC64
284 state->irq_soft_mask = local_paca->irq_soft_mask;
285 state->irq_happened = local_paca->irq_happened;
286 state->softe = regs->softe;
287
288 /*
289 * Set IRQS_ALL_DISABLED unconditionally so irqs_disabled() does
290 * the right thing, and set IRQ_HARD_DIS. We do not want to reconcile
291 * because that goes through irq tracing which we don't want in NMI.
292 */
293 local_paca->irq_soft_mask = IRQS_ALL_DISABLED;
294 local_paca->irq_happened |= PACA_IRQ_HARD_DIS;
295
296 if (!(regs->msr & MSR_EE) || is_implicit_soft_masked(regs)) {
297 /*
298 * Adjust regs->softe to be soft-masked if it had not been
299 * reconcied (e.g., interrupt entry with MSR[EE]=0 but softe
300 * not yet set disabled), or if it was in an implicit soft
301 * masked state. This makes arch_irq_disabled_regs(regs)
302 * behave as expected.
303 */
304 regs->softe = IRQS_ALL_DISABLED;
305 }
306
307 __hard_RI_enable();
308
309 /* Don't do any per-CPU operations until interrupt state is fixed */
310
311 if (nmi_disables_ftrace(regs)) {
312 state->ftrace_enabled = this_cpu_get_ftrace_enabled();
313 this_cpu_set_ftrace_enabled(0);
314 }
315 #endif
316
317 /* If data relocations are enabled, it's safe to use nmi_enter() */
318 if (mfmsr() & MSR_DR) {
319 nmi_enter();
320 return;
321 }
322
323 /*
324 * But do not use nmi_enter() for pseries hash guest taking a real-mode
325 * NMI because not everything it touches is within the RMA limit.
326 */
327 if (IS_ENABLED(CONFIG_PPC_BOOK3S_64) &&
328 firmware_has_feature(FW_FEATURE_LPAR) &&
329 !radix_enabled())
330 return;
331
332 /*
333 * Likewise, don't use it if we have some form of instrumentation (like
334 * KASAN shadow) that is not safe to access in real mode (even on radix)
335 */
336 if (IS_ENABLED(CONFIG_KASAN))
337 return;
338
339 /*
340 * Likewise, do not use it in real mode if percpu first chunk is not
341 * embedded. With CONFIG_NEED_PER_CPU_PAGE_FIRST_CHUNK enabled there
342 * are chances where percpu allocation can come from vmalloc area.
343 */
344 if (percpu_first_chunk_is_paged)
345 return;
346
347 /* Otherwise, it should be safe to call it */
348 nmi_enter();
349 }
350
interrupt_nmi_exit_prepare(struct pt_regs * regs,struct interrupt_nmi_state * state)351 static inline void interrupt_nmi_exit_prepare(struct pt_regs *regs, struct interrupt_nmi_state *state)
352 {
353 if (mfmsr() & MSR_DR) {
354 // nmi_exit if relocations are on
355 nmi_exit();
356 } else if (IS_ENABLED(CONFIG_PPC_BOOK3S_64) &&
357 firmware_has_feature(FW_FEATURE_LPAR) &&
358 !radix_enabled()) {
359 // no nmi_exit for a pseries hash guest taking a real mode exception
360 } else if (IS_ENABLED(CONFIG_KASAN)) {
361 // no nmi_exit for KASAN in real mode
362 } else if (percpu_first_chunk_is_paged) {
363 // no nmi_exit if percpu first chunk is not embedded
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_RAW(machine_check_early_boot);
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
interrupt_cond_local_irq_enable(struct pt_regs * regs)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(struct pt_regs *regs, unsigned long r0);
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 */
681