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Commit e3a61b0a authored by Simon Arlott's avatar Simon Arlott Committed by Ingo Molnar
Browse files

x86: add unknown_nmi_panic kernel parameter 



It's not possible to enable the unknown_nmi_panic sysctl option
until init is run. It's useful to be able to panic the kernel
during boot too, this adds a parameter to enable this option.

Signed-off-by: default avatarSimon Arlott <simon@fire.lp0.eu>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 5b664cb2

Documentation/kernel-parameters.txt

+4 −0
Original line number Diff line number Diff line
@@ -2158,6 +2158,10 @@ and is between 256 and 4096 characters. It is defined in the file 
			Note that genuine overcurrent events won't be

			reported either.



	unknown_nmi_panic

			[X86-32,X86-64]

			Set unknown_nmi_panic=1 early on boot.



	usbcore.autosuspend=

			[USB] The autosuspend time delay (in seconds) used

			for newly-detected USB devices (default 2).  This

arch/x86/kernel/nmi.c

+7 −0
Original line number Diff line number Diff line
@@ -448,6 +448,13 @@ nmi_watchdog_tick(struct pt_regs *regs, unsigned reason) 


#ifdef CONFIG_SYSCTL



static int __init setup_unknown_nmi_panic(char *str)

{

	unknown_nmi_panic = 1;

	return 1;

}

__setup("unknown_nmi_panic", setup_unknown_nmi_panic);



static int unknown_nmi_panic_callback(struct pt_regs *regs, int cpu)

{

	unsigned char reason = get_nmi_reason();