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 
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 
109 static inline void srr_regs_clobbered(void)
110 {
111 	local_paca->srr_valid = 0;
112 	local_paca->hsrr_valid = 0;
113 }
114 #else
115 static inline unsigned long search_kernel_restart_table(unsigned long addr)
116 {
117 	return 0;
118 }
119 
120 static inline bool is_implicit_soft_masked(struct pt_regs *regs)
121 {
122 	return false;
123 }
124 
125 static inline void srr_regs_clobbered(void)
126 {
127 }
128 #endif
129 
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 
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 
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  */
218 static inline void interrupt_exit_prepare(struct pt_regs *regs)
219 {
220 }
221 
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 
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 
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 
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 	/* Otherwise, it should be safe to call it */
340 	nmi_enter();
341 }
342 
343 static inline void interrupt_nmi_exit_prepare(struct pt_regs *regs, struct interrupt_nmi_state *state)
344 {
345 	if (mfmsr() & MSR_DR) {
346 		// nmi_exit if relocations are on
347 		nmi_exit();
348 	} else if (IS_ENABLED(CONFIG_PPC_BOOK3S_64) &&
349 		   firmware_has_feature(FW_FEATURE_LPAR) &&
350 		   !radix_enabled()) {
351 		// no nmi_exit for a pseries hash guest taking a real mode exception
352 	} else if (IS_ENABLED(CONFIG_KASAN)) {
353 		// no nmi_exit for KASAN in real mode
354 	} else {
355 		nmi_exit();
356 	}
357 
358 	/*
359 	 * nmi does not call nap_adjust_return because nmi should not create
360 	 * new work to do (must use irq_work for that).
361 	 */
362 
363 #ifdef CONFIG_PPC64
364 #ifdef CONFIG_PPC_BOOK3S
365 	if (arch_irq_disabled_regs(regs)) {
366 		unsigned long rst = search_kernel_restart_table(regs->nip);
367 		if (rst)
368 			regs_set_return_ip(regs, rst);
369 	}
370 #endif
371 
372 	if (nmi_disables_ftrace(regs))
373 		this_cpu_set_ftrace_enabled(state->ftrace_enabled);
374 
375 	/* Check we didn't change the pending interrupt mask. */
376 	WARN_ON_ONCE((state->irq_happened | PACA_IRQ_HARD_DIS) != local_paca->irq_happened);
377 	regs->softe = state->softe;
378 	local_paca->irq_happened = state->irq_happened;
379 	local_paca->irq_soft_mask = state->irq_soft_mask;
380 #endif
381 }
382 
383 /*
384  * Don't use noinstr here like x86, but rather add NOKPROBE_SYMBOL to each
385  * function definition. The reason for this is the noinstr section is placed
386  * after the main text section, i.e., very far away from the interrupt entry
387  * asm. That creates problems with fitting linker stubs when building large
388  * kernels.
389  */
390 #define interrupt_handler __visible noinline notrace __no_kcsan __no_sanitize_address
391 
392 /**
393  * DECLARE_INTERRUPT_HANDLER_RAW - Declare raw interrupt handler function
394  * @func:	Function name of the entry point
395  * @returns:	Returns a value back to asm caller
396  */
397 #define DECLARE_INTERRUPT_HANDLER_RAW(func)				\
398 	__visible long func(struct pt_regs *regs)
399 
400 /**
401  * DEFINE_INTERRUPT_HANDLER_RAW - Define raw interrupt handler function
402  * @func:	Function name of the entry point
403  * @returns:	Returns a value back to asm caller
404  *
405  * @func is called from ASM entry code.
406  *
407  * This is a plain function which does no tracing, reconciling, etc.
408  * The macro is written so it acts as function definition. Append the
409  * body with a pair of curly brackets.
410  *
411  * raw interrupt handlers must not enable or disable interrupts, or
412  * schedule, tracing and instrumentation (ftrace, lockdep, etc) would
413  * not be advisable either, although may be possible in a pinch, the
414  * trace will look odd at least.
415  *
416  * A raw handler may call one of the other interrupt handler functions
417  * to be converted into that interrupt context without these restrictions.
418  *
419  * On PPC64, _RAW handlers may return with fast_interrupt_return.
420  *
421  * Specific handlers may have additional restrictions.
422  */
423 #define DEFINE_INTERRUPT_HANDLER_RAW(func)				\
424 static __always_inline __no_sanitize_address __no_kcsan long		\
425 ____##func(struct pt_regs *regs);					\
426 									\
427 interrupt_handler long func(struct pt_regs *regs)			\
428 {									\
429 	long ret;							\
430 									\
431 	__hard_RI_enable();						\
432 									\
433 	ret = ____##func (regs);					\
434 									\
435 	return ret;							\
436 }									\
437 NOKPROBE_SYMBOL(func);							\
438 									\
439 static __always_inline __no_sanitize_address __no_kcsan long		\
440 ____##func(struct pt_regs *regs)
441 
442 /**
443  * DECLARE_INTERRUPT_HANDLER - Declare synchronous interrupt handler function
444  * @func:	Function name of the entry point
445  */
446 #define DECLARE_INTERRUPT_HANDLER(func)					\
447 	__visible void func(struct pt_regs *regs)
448 
449 /**
450  * DEFINE_INTERRUPT_HANDLER - Define synchronous interrupt handler function
451  * @func:	Function name of the entry point
452  *
453  * @func is called from ASM entry code.
454  *
455  * The macro is written so it acts as function definition. Append the
456  * body with a pair of curly brackets.
457  */
458 #define DEFINE_INTERRUPT_HANDLER(func)					\
459 static __always_inline void ____##func(struct pt_regs *regs);		\
460 									\
461 interrupt_handler void func(struct pt_regs *regs)			\
462 {									\
463 	interrupt_enter_prepare(regs);					\
464 									\
465 	____##func (regs);						\
466 									\
467 	interrupt_exit_prepare(regs);					\
468 }									\
469 NOKPROBE_SYMBOL(func);							\
470 									\
471 static __always_inline void ____##func(struct pt_regs *regs)
472 
473 /**
474  * DECLARE_INTERRUPT_HANDLER_RET - Declare synchronous interrupt handler function
475  * @func:	Function name of the entry point
476  * @returns:	Returns a value back to asm caller
477  */
478 #define DECLARE_INTERRUPT_HANDLER_RET(func)				\
479 	__visible long func(struct pt_regs *regs)
480 
481 /**
482  * DEFINE_INTERRUPT_HANDLER_RET - Define synchronous interrupt handler function
483  * @func:	Function name of the entry point
484  * @returns:	Returns a value back to asm caller
485  *
486  * @func is called from ASM entry code.
487  *
488  * The macro is written so it acts as function definition. Append the
489  * body with a pair of curly brackets.
490  */
491 #define DEFINE_INTERRUPT_HANDLER_RET(func)				\
492 static __always_inline long ____##func(struct pt_regs *regs);		\
493 									\
494 interrupt_handler long func(struct pt_regs *regs)			\
495 {									\
496 	long ret;							\
497 									\
498 	interrupt_enter_prepare(regs);					\
499 									\
500 	ret = ____##func (regs);					\
501 									\
502 	interrupt_exit_prepare(regs);					\
503 									\
504 	return ret;							\
505 }									\
506 NOKPROBE_SYMBOL(func);							\
507 									\
508 static __always_inline long ____##func(struct pt_regs *regs)
509 
510 /**
511  * DECLARE_INTERRUPT_HANDLER_ASYNC - Declare asynchronous interrupt handler function
512  * @func:	Function name of the entry point
513  */
514 #define DECLARE_INTERRUPT_HANDLER_ASYNC(func)				\
515 	__visible void func(struct pt_regs *regs)
516 
517 /**
518  * DEFINE_INTERRUPT_HANDLER_ASYNC - Define asynchronous interrupt handler function
519  * @func:	Function name of the entry point
520  *
521  * @func is called from ASM entry code.
522  *
523  * The macro is written so it acts as function definition. Append the
524  * body with a pair of curly brackets.
525  */
526 #define DEFINE_INTERRUPT_HANDLER_ASYNC(func)				\
527 static __always_inline void ____##func(struct pt_regs *regs);		\
528 									\
529 interrupt_handler void func(struct pt_regs *regs)			\
530 {									\
531 	interrupt_async_enter_prepare(regs);				\
532 									\
533 	____##func (regs);						\
534 									\
535 	interrupt_async_exit_prepare(regs);				\
536 }									\
537 NOKPROBE_SYMBOL(func);							\
538 									\
539 static __always_inline void ____##func(struct pt_regs *regs)
540 
541 /**
542  * DECLARE_INTERRUPT_HANDLER_NMI - Declare NMI interrupt handler function
543  * @func:	Function name of the entry point
544  * @returns:	Returns a value back to asm caller
545  */
546 #define DECLARE_INTERRUPT_HANDLER_NMI(func)				\
547 	__visible long func(struct pt_regs *regs)
548 
549 /**
550  * DEFINE_INTERRUPT_HANDLER_NMI - Define NMI interrupt handler function
551  * @func:	Function name of the entry point
552  * @returns:	Returns a value back to asm caller
553  *
554  * @func is called from ASM entry code.
555  *
556  * The macro is written so it acts as function definition. Append the
557  * body with a pair of curly brackets.
558  */
559 #define DEFINE_INTERRUPT_HANDLER_NMI(func)				\
560 static __always_inline __no_sanitize_address __no_kcsan long		\
561 ____##func(struct pt_regs *regs);					\
562 									\
563 interrupt_handler long func(struct pt_regs *regs)			\
564 {									\
565 	struct interrupt_nmi_state state;				\
566 	long ret;							\
567 									\
568 	interrupt_nmi_enter_prepare(regs, &state);			\
569 									\
570 	ret = ____##func (regs);					\
571 									\
572 	interrupt_nmi_exit_prepare(regs, &state);			\
573 									\
574 	return ret;							\
575 }									\
576 NOKPROBE_SYMBOL(func);							\
577 									\
578 static __always_inline  __no_sanitize_address __no_kcsan long		\
579 ____##func(struct pt_regs *regs)
580 
581 
582 /* Interrupt handlers */
583 /* kernel/traps.c */
584 DECLARE_INTERRUPT_HANDLER_NMI(system_reset_exception);
585 #ifdef CONFIG_PPC_BOOK3S_64
586 DECLARE_INTERRUPT_HANDLER_RAW(machine_check_early_boot);
587 DECLARE_INTERRUPT_HANDLER_ASYNC(machine_check_exception_async);
588 #endif
589 DECLARE_INTERRUPT_HANDLER_NMI(machine_check_exception);
590 DECLARE_INTERRUPT_HANDLER(SMIException);
591 DECLARE_INTERRUPT_HANDLER(handle_hmi_exception);
592 DECLARE_INTERRUPT_HANDLER(unknown_exception);
593 DECLARE_INTERRUPT_HANDLER_ASYNC(unknown_async_exception);
594 DECLARE_INTERRUPT_HANDLER_NMI(unknown_nmi_exception);
595 DECLARE_INTERRUPT_HANDLER(instruction_breakpoint_exception);
596 DECLARE_INTERRUPT_HANDLER(RunModeException);
597 DECLARE_INTERRUPT_HANDLER(single_step_exception);
598 DECLARE_INTERRUPT_HANDLER(program_check_exception);
599 DECLARE_INTERRUPT_HANDLER(emulation_assist_interrupt);
600 DECLARE_INTERRUPT_HANDLER(alignment_exception);
601 DECLARE_INTERRUPT_HANDLER(StackOverflow);
602 DECLARE_INTERRUPT_HANDLER(stack_overflow_exception);
603 DECLARE_INTERRUPT_HANDLER(kernel_fp_unavailable_exception);
604 DECLARE_INTERRUPT_HANDLER(altivec_unavailable_exception);
605 DECLARE_INTERRUPT_HANDLER(vsx_unavailable_exception);
606 DECLARE_INTERRUPT_HANDLER(facility_unavailable_exception);
607 DECLARE_INTERRUPT_HANDLER(fp_unavailable_tm);
608 DECLARE_INTERRUPT_HANDLER(altivec_unavailable_tm);
609 DECLARE_INTERRUPT_HANDLER(vsx_unavailable_tm);
610 DECLARE_INTERRUPT_HANDLER_NMI(performance_monitor_exception_nmi);
611 DECLARE_INTERRUPT_HANDLER_ASYNC(performance_monitor_exception_async);
612 DECLARE_INTERRUPT_HANDLER_RAW(performance_monitor_exception);
613 DECLARE_INTERRUPT_HANDLER(DebugException);
614 DECLARE_INTERRUPT_HANDLER(altivec_assist_exception);
615 DECLARE_INTERRUPT_HANDLER(CacheLockingException);
616 DECLARE_INTERRUPT_HANDLER(SPEFloatingPointException);
617 DECLARE_INTERRUPT_HANDLER(SPEFloatingPointRoundException);
618 DECLARE_INTERRUPT_HANDLER_NMI(WatchdogException);
619 DECLARE_INTERRUPT_HANDLER(kernel_bad_stack);
620 
621 /* slb.c */
622 DECLARE_INTERRUPT_HANDLER_RAW(do_slb_fault);
623 DECLARE_INTERRUPT_HANDLER(do_bad_segment_interrupt);
624 
625 /* hash_utils.c */
626 DECLARE_INTERRUPT_HANDLER(do_hash_fault);
627 
628 /* fault.c */
629 DECLARE_INTERRUPT_HANDLER(do_page_fault);
630 DECLARE_INTERRUPT_HANDLER(do_bad_page_fault_segv);
631 
632 /* process.c */
633 DECLARE_INTERRUPT_HANDLER(do_break);
634 
635 /* time.c */
636 DECLARE_INTERRUPT_HANDLER_ASYNC(timer_interrupt);
637 
638 /* mce.c */
639 DECLARE_INTERRUPT_HANDLER_NMI(machine_check_early);
640 DECLARE_INTERRUPT_HANDLER_NMI(hmi_exception_realmode);
641 
642 DECLARE_INTERRUPT_HANDLER_ASYNC(TAUException);
643 
644 /* irq.c */
645 DECLARE_INTERRUPT_HANDLER_ASYNC(do_IRQ);
646 
647 void __noreturn unrecoverable_exception(struct pt_regs *regs);
648 
649 void replay_system_reset(void);
650 void replay_soft_interrupts(void);
651 
652 static inline void interrupt_cond_local_irq_enable(struct pt_regs *regs)
653 {
654 	if (!arch_irq_disabled_regs(regs))
655 		local_irq_enable();
656 }
657 
658 long system_call_exception(struct pt_regs *regs, unsigned long r0);
659 notrace unsigned long syscall_exit_prepare(unsigned long r3, struct pt_regs *regs, long scv);
660 notrace unsigned long interrupt_exit_user_prepare(struct pt_regs *regs);
661 notrace unsigned long interrupt_exit_kernel_prepare(struct pt_regs *regs);
662 #ifdef CONFIG_PPC64
663 unsigned long syscall_exit_restart(unsigned long r3, struct pt_regs *regs);
664 unsigned long interrupt_exit_user_restart(struct pt_regs *regs);
665 unsigned long interrupt_exit_kernel_restart(struct pt_regs *regs);
666 #endif
667 
668 #endif /* __ASSEMBLY__ */
669 
670 #endif /* _ASM_POWERPC_INTERRUPT_H */
671