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Subject[PATCH 07/19] ACPI, APEI, GHES, Support disable GHES at boot time
Date
From: Huang Ying <ying.huang@intel.com>

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 <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>
---
drivers/acpi/apei/ghes.c | 8 ++++++++
drivers/acpi/apei/hest.c | 17 +++++++++--------
include/acpi/apei.h | 1 +
3 files changed, 18 insertions(+), 8 deletions(-)
diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index f339c0f..b142b94 100644
--- 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
index 181bc2f..05fee06 100644
--- 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
index e67b523..d40bc55 100644
--- 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);
--
1.7.6.396.ge0613


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