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ACPI, eMCA: Combine eMCA/EDAC event reporting priority

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eMCA has higher H/W event reporting priority. Once it is
loaded, EDAC event reporting should be disabled, unless EDAC
overrides eMCA priority via command line parameter "edac_report=force".

Signed-off-by: Chen, Gong <gong.chen@linux.intel.com>
Acked-by: Tony Luck <tony.luck@intel.com>
Link: http://lkml.kernel.org/r/1386310630-12529-4-git-send-email-gong.chen@linux.intel.com
[ Boris: massage printk message. ]
Signed-off-by: Borislav Petkov <bp@suse.de>
This commit is contained in:
Chen, Gong 2013-12-06 01:17:10 -05:00 committed by Borislav Petkov
parent fd52103966
commit 42139eb356
1 changed files with 16 additions and 2 deletions
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18
drivers/acpi/acpi_extlog.c
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@ -12,6 +12,7 @@
#include <acpi/acpi_bus.h>
#include <linux/cper.h>
#include <linux/ratelimit.h>
#include <linux/edac.h>
#include <asm/cpu.h>
#include <asm/mce.h>
@ -43,6 +44,8 @@ struct extlog_l1_head {
u8 rev1[12];
};
static int old_edac_report_status;
static u8 extlog_dsm_uuid[] = "663E35AF-CC10-41A4-88EA-5470AF055295";
/* L1 table related physical address */
@ -150,7 +153,7 @@ static int extlog_print(struct notifier_block *nb, unsigned long val,
rc = print_extlog_rcd(NULL, (struct acpi_generic_status *)elog_buf, cpu);
return NOTIFY_DONE;
return NOTIFY_STOP;
}
static int extlog_get_dsm(acpi_handle handle, int rev, int func, u64 *ret)
@ -231,8 +234,12 @@ static int __init extlog_init(void)
u64 cap;
int rc;
rc = -ENODEV;
if (get_edac_report_status() == EDAC_REPORTING_FORCE) {
pr_warn("Not loading eMCA, error reporting force-enabled through EDAC.\n");
return -EPERM;
}
rc = -ENODEV;
rdmsrl(MSR_IA32_MCG_CAP, cap);
if (!(cap & MCG_ELOG_P))
return rc;
@ -287,6 +294,12 @@ static int __init extlog_init(void)
if (elog_buf == NULL)
goto err_release_elog;
/*
* eMCA event report method has higher priority than EDAC method,
* unless EDAC event report method is mandatory.
*/
old_edac_report_status = get_edac_report_status();
set_edac_report_status(EDAC_REPORTING_DISABLED);
mce_register_decode_chain(&extlog_mce_dec);
/* enable OS to be involved to take over management from BIOS */
((struct extlog_l1_head *)extlog_l1_addr)->flags |= FLAG_OS_OPTIN;
@ -308,6 +321,7 @@ err:
static void __exit extlog_exit(void)
{
set_edac_report_status(old_edac_report_status);
mce_unregister_decode_chain(&extlog_mce_dec);
((struct extlog_l1_head *)extlog_l1_addr)->flags &= ~FLAG_OS_OPTIN;
if (extlog_l1_addr)