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ACPI, APEI, Add WHEA _OSC support

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APEI firmware first mode must be turned on explicitly on some
machines, otherwise there may be no GHES hardware error record for
hardware error notification.  APEI bit in generic _OSC call can be
used to do that, but on some machine, a special WHEA _OSC call must be
used.  This patch adds the support to that WHEA _OSC call.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Reviewed-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Huang Ying 2011-07-13 13:14:21 +08:00 committed by Len Brown
parent eccddd32ce
commit 9fb0bfe140
3 changed files with 38 additions and 0 deletions
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26
drivers/acpi/apei/apei-base.c
View File

@ -604,3 +604,29 @@ struct dentry *apei_get_debugfs_dir(void)
return dapei;
}
EXPORT_SYMBOL_GPL(apei_get_debugfs_dir);
int apei_osc_setup(void)
{
static u8 whea_uuid_str[] = "ed855e0c-6c90-47bf-a62a-26de0fc5ad5c";
acpi_handle handle;
u32 capbuf[3];
struct acpi_osc_context context = {
.uuid_str = whea_uuid_str,
.rev = 1,
.cap.length = sizeof(capbuf),
.cap.pointer = capbuf,
};
capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
capbuf[OSC_SUPPORT_TYPE] = 0;
capbuf[OSC_CONTROL_TYPE] = 0;
if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle))
|| ACPI_FAILURE(acpi_run_osc(handle, &context)))
return -EIO;
else {
kfree(context.ret.pointer);
return 0;
}
}
EXPORT_SYMBOL_GPL(apei_osc_setup);

2
drivers/acpi/apei/apei-internal.h
View File

@ -124,4 +124,6 @@ void apei_estatus_print(const char *pfx,
const struct acpi_hest_generic_status *estatus);
int apei_estatus_check_header(const struct acpi_hest_generic_status *estatus);
int apei_estatus_check(const struct acpi_hest_generic_status *estatus);
int apei_osc_setup(void);
#endif

10
drivers/acpi/apei/ghes.c
View File

@ -681,6 +681,16 @@ static int __init ghes_init(void)
if (rc)
goto err_ioremap_exit;
rc = apei_osc_setup();
if (rc == 0 && osc_sb_apei_support_acked)
pr_info(GHES_PFX "APEI firmware first mode is enabled by APEI bit and WHEA _OSC.\n");
else if (rc == 0 && !osc_sb_apei_support_acked)
pr_info(GHES_PFX "APEI firmware first mode is enabled by WHEA _OSC.\n");
else if (rc && osc_sb_apei_support_acked)
pr_info(GHES_PFX "APEI firmware first mode is enabled by APEI bit.\n");
else
pr_info(GHES_PFX "Failed to enable APEI firmware first mode.\n");
return 0;
err_ioremap_exit:
ghes_ioremap_exit();