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 	/* If data relocations are enabled, it's safe to use nmi_enter() */
328 	if (mfmsr() & MSR_DR) {
329 		nmi_enter();
330 		return;
331 	}
332 
333 	/*
334 	 * But do not use nmi_enter() for pseries hash guest taking a real-mode
335 	 * NMI because not everything it touches is within the RMA limit.
336 	 */
337 	if (IS_ENABLED(CONFIG_PPC_BOOK3S_64) &&
338 	    firmware_has_feature(FW_FEATURE_LPAR) &&
339 	    !radix_enabled())
340 		return;
341 
342 	/*
343 	 * Likewise, don't use it if we have some form of instrumentation (like
344 	 * KASAN shadow) that is not safe to access in real mode (even on radix)
345 	 */
346 	if (IS_ENABLED(CONFIG_KASAN))
347 		return;
348 
349 	/* Otherwise, it should be safe to call it */
350 	nmi_enter();
351 }
352 
353 static inline void interrupt_nmi_exit_prepare(struct pt_regs *regs, struct interrupt_nmi_state *state)
354 {
355 	if (mfmsr() & MSR_DR) {
356 		// nmi_exit if relocations are on
357 		nmi_exit();
358 	} else if (IS_ENABLED(CONFIG_PPC_BOOK3S_64) &&
359 		   firmware_has_feature(FW_FEATURE_LPAR) &&
360 		   !radix_enabled()) {
361 		// no nmi_exit for a pseries hash guest taking a real mode exception
362 	} else if (IS_ENABLED(CONFIG_KASAN)) {
363 		// no nmi_exit for KASAN in real mode
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_ASYNC(machine_check_exception_async);
597 #endif
598 DECLARE_INTERRUPT_HANDLER_NMI(machine_check_exception);
599 DECLARE_INTERRUPT_HANDLER(SMIException);
600 DECLARE_INTERRUPT_HANDLER(handle_hmi_exception);
601 DECLARE_INTERRUPT_HANDLER(unknown_exception);
602 DECLARE_INTERRUPT_HANDLER_ASYNC(unknown_async_exception);
603 DECLARE_INTERRUPT_HANDLER_NMI(unknown_nmi_exception);
604 DECLARE_INTERRUPT_HANDLER(instruction_breakpoint_exception);
605 DECLARE_INTERRUPT_HANDLER(RunModeException);
606 DECLARE_INTERRUPT_HANDLER(single_step_exception);
607 DECLARE_INTERRUPT_HANDLER(program_check_exception);
608 DECLARE_INTERRUPT_HANDLER(emulation_assist_interrupt);
609 DECLARE_INTERRUPT_HANDLER(alignment_exception);
610 DECLARE_INTERRUPT_HANDLER(StackOverflow);
611 DECLARE_INTERRUPT_HANDLER(stack_overflow_exception);
612 DECLARE_INTERRUPT_HANDLER(kernel_fp_unavailable_exception);
613 DECLARE_INTERRUPT_HANDLER(altivec_unavailable_exception);
614 DECLARE_INTERRUPT_HANDLER(vsx_unavailable_exception);
615 DECLARE_INTERRUPT_HANDLER(facility_unavailable_exception);
616 DECLARE_INTERRUPT_HANDLER(fp_unavailable_tm);
617 DECLARE_INTERRUPT_HANDLER(altivec_unavailable_tm);
618 DECLARE_INTERRUPT_HANDLER(vsx_unavailable_tm);
619 DECLARE_INTERRUPT_HANDLER_NMI(performance_monitor_exception_nmi);
620 DECLARE_INTERRUPT_HANDLER_ASYNC(performance_monitor_exception_async);
621 DECLARE_INTERRUPT_HANDLER_RAW(performance_monitor_exception);
622 DECLARE_INTERRUPT_HANDLER(DebugException);
623 DECLARE_INTERRUPT_HANDLER(altivec_assist_exception);
624 DECLARE_INTERRUPT_HANDLER(CacheLockingException);
625 DECLARE_INTERRUPT_HANDLER(SPEFloatingPointException);
626 DECLARE_INTERRUPT_HANDLER(SPEFloatingPointRoundException);
627 DECLARE_INTERRUPT_HANDLER_NMI(WatchdogException);
628 DECLARE_INTERRUPT_HANDLER(kernel_bad_stack);
629 
630 /* slb.c */
631 DECLARE_INTERRUPT_HANDLER_RAW(do_slb_fault);
632 DECLARE_INTERRUPT_HANDLER(do_bad_segment_interrupt);
633 
634 /* hash_utils.c */
635 DECLARE_INTERRUPT_HANDLER(do_hash_fault);
636 
637 /* fault.c */
638 DECLARE_INTERRUPT_HANDLER(do_page_fault);
639 DECLARE_INTERRUPT_HANDLER(do_bad_page_fault_segv);
640 
641 /* process.c */
642 DECLARE_INTERRUPT_HANDLER(do_break);
643 
644 /* time.c */
645 DECLARE_INTERRUPT_HANDLER_ASYNC(timer_interrupt);
646 
647 /* mce.c */
648 DECLARE_INTERRUPT_HANDLER_NMI(machine_check_early);
649 DECLARE_INTERRUPT_HANDLER_NMI(hmi_exception_realmode);
650 
651 DECLARE_INTERRUPT_HANDLER_ASYNC(TAUException);
652 
653 /* irq.c */
654 DECLARE_INTERRUPT_HANDLER_ASYNC(do_IRQ);
655 
656 void __noreturn unrecoverable_exception(struct pt_regs *regs);
657 
658 void replay_system_reset(void);
659 void replay_soft_interrupts(void);
660 
661 static inline void interrupt_cond_local_irq_enable(struct pt_regs *regs)
662 {
663 	if (!arch_irq_disabled_regs(regs))
664 		local_irq_enable();
665 }
666 
667 long system_call_exception(long r3, long r4, long r5, long r6, long r7, long r8,
668 			   unsigned long r0, struct pt_regs *regs);
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