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Commit c700f013 authored by Chen, Gong's avatar Chen, Gong Committed by Borislav Petkov
Browse files

EDAC: Add an edac_report parameter to EDAC 



This new parameter is used to control how to report HW error reporting,
especially for newer Intel platform, like Ivybridge-EX, which contains
an enhanced error decoding functionality in the firmware, i.e. eMCA.

Signed-off-by: default avatarChen, Gong <gong.chen@linux.intel.com>
Acked-by: default avatarTony Luck <tony.luck@intel.com>
Link: http://lkml.kernel.org/r/1386310630-12529-2-git-send-email-gong.chen@linux.intel.com


[ Boris: massage commit message. ]
Signed-off-by: default avatarBorislav Petkov <bp@suse.de>
parent 545104dd

Documentation/kernel-parameters.txt

+8 −0
Original line number Diff line number Diff line
@@ -881,6 +881,14 @@ bytes respectively. Such letter suffixes can also be entirely omitted. 


			The xen output can only be used by Xen PV guests.



	edac_report=	[HW,EDAC] Control how to report EDAC event

			Format: {"on" | "off" | "force"}

			on: enable EDAC to report H/W event. May be overridden

			by other higher priority error reporting module.

			off: disable H/W event reporting through EDAC.

			force: enforce the use of EDAC to report H/W event.

			default: on.



	ekgdboc=	[X86,KGDB] Allow early kernel console debugging

			ekgdboc=kbd

drivers/edac/edac_stub.c

+19 −0
Original line number Diff line number Diff line
@@ -29,6 +29,25 @@ EXPORT_SYMBOL_GPL(edac_err_assert); 


static atomic_t edac_subsys_valid = ATOMIC_INIT(0);



int edac_report_status = EDAC_REPORTING_ENABLED;

EXPORT_SYMBOL_GPL(edac_report_status);



static int __init edac_report_setup(char *str)

{

	if (!str)

		return -EINVAL;



	if (!strncmp(str, "on", 2))

		set_edac_report_status(EDAC_REPORTING_ENABLED);

	else if (!strncmp(str, "off", 3))

		set_edac_report_status(EDAC_REPORTING_DISABLED);

	else if (!strncmp(str, "force", 5))

		set_edac_report_status(EDAC_REPORTING_FORCE);



	return 0;

}

__setup("edac_report=", edac_report_setup);



/*

 * called to determine if there is an EDAC driver interested in

 * knowing an event (such as NMI) occurred

include/linux/edac.h

+28 −0
Original line number Diff line number Diff line
@@ -35,6 +35,34 @@ extern void edac_atomic_assert_error(void); 
extern struct bus_type *edac_get_sysfs_subsys(void);

extern void edac_put_sysfs_subsys(void);



enum {

	EDAC_REPORTING_ENABLED,

	EDAC_REPORTING_DISABLED,

	EDAC_REPORTING_FORCE

};



extern int edac_report_status;

#ifdef CONFIG_EDAC

static inline int get_edac_report_status(void)

{

	return edac_report_status;

}



static inline void set_edac_report_status(int new)

{

	edac_report_status = new;

}

#else

static inline int get_edac_report_status(void)

{

	return EDAC_REPORTING_DISABLED;

}



static inline void set_edac_report_status(int new)

{

}

#endif



static inline void opstate_init(void)

{

	switch (edac_op_state) {