Commit 9fb0bfe1 authored by Huang Ying's avatar Huang Ying Committed by Len Brown
Browse files

ACPI, APEI, Add WHEA _OSC support 



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: default avatarHuang Ying <ying.huang@intel.com>
Reviewed-by: default avatarAndi Kleen <ak@linux.intel.com>
Reviewed-by: default avatarMatthew Garrett <mjg@redhat.com>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent eccddd32

drivers/acpi/apei/apei-base.c

+26 −0
Original line number Diff line number Diff line
@@ -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);

drivers/acpi/apei/apei-internal.h

+2 −0
Original line number Diff line number Diff line
@@ -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

drivers/acpi/apei/ghes.c

+10 −0
Original line number Diff line number Diff line
@@ -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();

CRA Git | Maintained and supported by SUSTech CRA and CCSE