ACPI, APEI, GHES, Support disable GHES at boot time

Some machine may have broken firmware so that GHES and firmware first mode should be disabled. This patch adds support to that. Signed-off-by: Huang Ying <[email protected]> Reviewed-by: Andi Kleen <[email protected]> Reviewed-by: Matthew Garrett <[email protected]> Signed-off-by: Len Brown <[email protected]>
mgowda · Jul 14, 2011 · b6a9501 · b6a9501
1 parent 86cd473
commit b6a9501
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Showing 3 changed files with 18 additions and 8 deletions.
diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
@@ -77,6 +77,9 @@ struct ghes {
 	};
 };
 
+int ghes_disable;
+module_param_named(disable, ghes_disable, bool, 0);
+
 static int ghes_panic_timeout	__read_mostly = 30;
 
 /*
@@ -665,6 +668,11 @@ static int __init ghes_init(void)
 		return -EINVAL;
 	}
 
+	if (ghes_disable) {
+		pr_info(GHES_PFX "GHES is not enabled!\n");
+		return -EINVAL;
+	}
+
 	rc = ghes_ioremap_init();
 	if (rc)
 		goto err;

diff --git a/drivers/acpi/apei/hest.c b/drivers/acpi/apei/hest.c
@@ -231,16 +231,17 @@ void __init acpi_hest_init(void)
 		goto err;
 	}
 
-	rc = apei_hest_parse(hest_parse_ghes_count, &ghes_count);
-	if (rc)
-		goto err;
-
-	rc = hest_ghes_dev_register(ghes_count);
-	if (!rc) {
-		pr_info(HEST_PFX "Table parsing has been initialized.\n");
-		return;
+	if (!ghes_disable) {
+		rc = apei_hest_parse(hest_parse_ghes_count, &ghes_count);
+		if (rc)
+			goto err;
+		rc = hest_ghes_dev_register(ghes_count);
+		if (rc)
+			goto err;
 	}
 
+	pr_info(HEST_PFX "Table parsing has been initialized.\n");
+	return;
 err:
 	hest_disable = 1;
 }
diff --git a/include/acpi/apei.h b/include/acpi/apei.h
@@ -18,6 +18,7 @@
 
 extern int hest_disable;
 extern int erst_disable;
+extern int ghes_disable;
 
 #ifdef CONFIG_ACPI_APEI
 void __init acpi_hest_init(void);