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EDAC: Add an edac_report parameter to EDAC

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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: Chen, Gong <gong.chen@linux.intel.com>
Acked-by: Tony 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: Borislav Petkov <bp@suse.de>
This commit is contained in:
Chen, Gong 2013-12-06 01:17:08 -05:00 • committed by Borislav Petkov
commit c700f013ad
3 changed files with 55 additions and 0 deletions
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8
Documentation/kernel-parameters.txt
View file

@ -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

19
drivers/edac/edac_stub.c
View file

@ -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

28
include/linux/edac.h
View file

@ -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) {