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| author | Ganesh Goudar <ganeshgr@linux.ibm.com> | 2022-01-20 15:19:31 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2022-03-07 16:05:00 +0300 |
| commit | cc15ff3275694fedc33cd3d53212a43eec7aa0bc (patch) | |
| tree | dc15adec5a7491d5c1d6405e63169188942d45a8 /arch/powerpc/include/asm/mce.h | |
| parent | 0a182611d149b5b747014fbb230ec35b20a45c86 (diff) | |
| download | linux-cc15ff3275694fedc33cd3d53212a43eec7aa0bc.tar.xz | |
powerpc/mce: Avoid using irq_work_queue() in realmode
In realmode mce handler we use irq_work_queue() to defer
the processing of mce events, irq_work_queue() can only
be called when translation is enabled because it touches
memory outside RMA, hence we enable translation before
calling irq_work_queue and disable on return, though it
is not safe to do in realmode.
To avoid this, program the decrementer and call the event
processing functions from timer handler.
Signed-off-by: Ganesh Goudar <ganeshgr@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220120121931.517974-1-ganeshgr@linux.ibm.com
Diffstat (limited to 'arch/powerpc/include/asm/mce.h')
| -rw-r--r-- | arch/powerpc/include/asm/mce.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/mce.h b/arch/powerpc/include/asm/mce.h index 331d944280b8..c9f0936bd3c9 100644 --- a/arch/powerpc/include/asm/mce.h +++ b/arch/powerpc/include/asm/mce.h @@ -235,8 +235,21 @@ extern void machine_check_print_event_info(struct machine_check_event *evt, unsigned long addr_to_pfn(struct pt_regs *regs, unsigned long addr); extern void mce_common_process_ue(struct pt_regs *regs, struct mce_error_info *mce_err); +void mce_irq_work_queue(void); int mce_register_notifier(struct notifier_block *nb); int mce_unregister_notifier(struct notifier_block *nb); + +#ifdef CONFIG_PPC_BOOK3S_64 +void mce_run_irq_context_handlers(void); +#else +static inline void mce_run_irq_context_handlers(void) { }; +#endif /* CONFIG_PPC_BOOK3S_64 */ + +#ifdef CONFIG_PPC_BOOK3S_64 +void set_mce_pending_irq_work(void); +void clear_mce_pending_irq_work(void); +#endif /* CONFIG_PPC_BOOK3S_64 */ + #ifdef CONFIG_PPC_BOOK3S_64 void flush_and_reload_slb(void); void flush_erat(void); |