[PATCH] x86-64: Add command line option to set machine check tolerance level (8c566ef5) · Commits · e / devices / android_kernel_fairphone_FP3

Documentation/x86_64/boot-options.txt

+5 −0

Original line number	Original line	Diff line number	Diff line
	@@ -11,6 +11,11 @@ Machine check
	If your BIOS doesn't do that it's a good idea to enable though		If your BIOS doesn't do that it's a good idea to enable though
	to make sure you log even machine check events that result		to make sure you log even machine check events that result
	in a reboot.		in a reboot.
			mce=tolerancelevel (number)
			0: always panic, 1: panic if deadlock possible,
			2: try to avoid panic, 3: never panic or exit (for testing)
			default is 1
			Can be also set using sysfs which is preferable.

	nomce (for compatibility with i386): same as mce=off		nomce (for compatibility with i386): same as mce=off

+4 −0

Original line number	Original line	Diff line number	Diff line
	@@ -17,6 +17,7 @@
	#include <linux/fs.h>		#include <linux/fs.h>
	#include <linux/cpu.h>		#include <linux/cpu.h>
	#include <linux/percpu.h>		#include <linux/percpu.h>
			#include <linux/ctype.h>
	#include <asm/processor.h>		#include <asm/processor.h>
	#include <asm/msr.h>		#include <asm/msr.h>
	#include <asm/mce.h>		#include <asm/mce.h>
	@@ -489,6 +490,7 @@ static int __init mcheck_disable(char *str)

	/* mce=off disables machine check. Note you can reenable it later		/* mce=off disables machine check. Note you can reenable it later
	using sysfs.		using sysfs.
			mce=TOLERANCELEVEL (number, see above)
	mce=bootlog Log MCEs from before booting. Disabled by default to work		mce=bootlog Log MCEs from before booting. Disabled by default to work
	around buggy BIOS that leave bogus MCEs. */		around buggy BIOS that leave bogus MCEs. */
	static int __init mcheck_enable(char *str)		static int __init mcheck_enable(char *str)
	@@ -499,6 +501,8 @@ static int __init mcheck_enable(char *str)
	mce_dont_init = 1;		mce_dont_init = 1;
	else if (!strcmp(str, "bootlog"))		else if (!strcmp(str, "bootlog"))
	mce_bootlog = 1;		mce_bootlog = 1;
			else if (isdigit(str[0]))
			get_option(&str, &tolerant);
	else		else
	printk("mce= argument %s ignored. Please use /sys", str);		printk("mce= argument %s ignored. Please use /sys", str);
	return 0;		return 0;