APEI firmware first mode must be turned on explicitly on some
machines, otherwise they 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 APEI _OSC call must
be used. This patch adds the support to that APEI _OSC call.
Signed-off-by: Huang Ying <ying.huang@xxxxxxxxx>
---
drivers/acpi/apei/apei-base.c | 26 ++++++++++++++++++++++++++
drivers/acpi/apei/apei-internal.h | 2 ++
drivers/acpi/apei/ghes.c | 4 ++++
3 files changed, 32 insertions(+)
--- 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 apei_uuid_str[] = "ed855e0c-6c90-47bf-a62a-26de0fc5ad5c";
+ acpi_handle handle;
+ u32 capbuf[3];
+ struct acpi_osc_context context = {
+ .uuid_str = apei_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);
--- 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
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -678,6 +678,10 @@ static int __init ghes_init(void)
if (rc)
goto err_ioremap_exit;
+ rc = apei_osc_setup();
+ if (rc)
+ pr_info(GHES_PFX "Evaluate APEI _OSC failed!\n");
+
return 0;
err_ioremap_exit:
ghes_ioremap_exit();
--
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