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powerpc/83xx: handle machine check caused by watchdog timer

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When the watchdog timer is set in interrupt mode, it causes a
machine check when it times out. The purpose of this mode is to
ease debugging, not to crash the kernel and reboot the machine.

This patch implements a special handling for that, in order to not
crash the kernel if the watchdog times out while in interrupt or
within the idle task.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
[scottwood: added missing #include]
Signed-off-by: Scott Wood <oss@buserror.net>
This commit is contained in:
Christophe Leroy
2018-12-10 11:41:29 +00:00
committed by Scott Wood
parent 01f45c8fb8
commit 0deae39cec
4 changed files with 26 additions and 4 deletions
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arch/powerpc/include/asm/cputable.h
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@@ -44,6 +44,7 @@ extern int machine_check_e500(struct pt_regs *regs);
extern int machine_check_e200(struct pt_regs *regs);
extern int machine_check_47x(struct pt_regs *regs);
int machine_check_8xx(struct pt_regs *regs);
int machine_check_83xx(struct pt_regs *regs);
extern void cpu_down_flush_e500v2(void);
extern void cpu_down_flush_e500mc(void);