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authorHuang Ying <ying.huang@intel.com>2011-07-13 09:14:21 +0400
committerLen Brown <len.brown@intel.com>2011-07-14 07:38:49 +0400
commit9fb0bfe1408d5506b7b83d13d1eed573fd71d67d (patch)
tree51700355f453ab47de4bd799a4468c030db6e088 /drivers/acpi/apei
parenteccddd32ced0df8f9130024157bf8d37df860d76 (diff)
downloadlinux-9fb0bfe1408d5506b7b83d13d1eed573fd71d67d.tar.xz
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: 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>
Diffstat (limited to 'drivers/acpi/apei')
-rw-r--r--drivers/acpi/apei/apei-base.c26
-rw-r--r--drivers/acpi/apei/apei-internal.h2
-rw-r--r--drivers/acpi/apei/ghes.c10
3 files changed, 38 insertions, 0 deletions
diff --git a/drivers/acpi/apei/apei-base.c b/drivers/acpi/apei/apei-base.c
index 0714194229da..8041248fce9b 100644
--- a/drivers/acpi/apei/apei-base.c
+++ b/drivers/acpi/apei/apei-base.c
@@ -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);
diff --git a/drivers/acpi/apei/apei-internal.h b/drivers/acpi/apei/apei-internal.h
index f286cf753f32..f57050e7a5e7 100644
--- a/drivers/acpi/apei/apei-internal.h
+++ b/drivers/acpi/apei/apei-internal.h
@@ -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
diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index b142b94bf8b2..b1390a61cde1 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -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();