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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 (user_mode(regs))
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         /*
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
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
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 */
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