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 */
690