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authorHuang Ying <ying.huang@intel.com>2011-07-13 13:14:20 +0800
committerLen Brown <len.brown@intel.com>2011-07-13 23:38:20 -0400
commiteccddd32ced0df8f9130024157bf8d37df860d76 (patch)
tree6e4372e5096fde4d2ffea12a0b992bef06ad589f
parentb6a9501658530d8b8374e37f1edb549039a8a260 (diff)
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ACPI, APEI, Add APEI bit support in generic _OSC call
In APEI firmware first mode, hardware error is reported by hardware to firmware firstly, then firmware reports the error to Linux in a GHES error record via POLL/SCI/IRQ/NMI etc. This may result in some issues if OS has no full APEI support. So some firmware implementation will work in a back-compatible mode by default. Where firmware will only notify OS in old-fashion, without GHES record. For example, for a fatal hardware error, only NMI is signaled, no GHES record. To gain full APEI power on these machines, APEI bit in generic _OSC call can be specified to tell firmware that Linux has full APEI support. This patch adds the APEI bit support in generic _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>
-rw-r--r--drivers/acpi/bus.c16
-rw-r--r--include/linux/acpi.h2
2 files changed, 16 insertions, 2 deletions
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index d1e06c1..43ce3b0 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -39,6 +39,7 @@
#include <linux/pci.h>
#include <acpi/acpi_bus.h>
#include <acpi/acpi_drivers.h>
+#include <acpi/apei.h>
#include <linux/dmi.h>
#include <linux/suspend.h>
@@ -519,6 +520,7 @@ out_kfree:
}
EXPORT_SYMBOL(acpi_run_osc);
+bool osc_sb_apei_support_acked;
static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48";
static void acpi_bus_osc_support(void)
{
@@ -541,11 +543,21 @@ static void acpi_bus_osc_support(void)
#if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)
capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PPC_OST_SUPPORT;
#endif
+
+#ifdef CONFIG_ACPI_APEI_GHES
+ if (!ghes_disable)
+ capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_APEI_SUPPORT;
+#endif
if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
return;
- if (ACPI_SUCCESS(acpi_run_osc(handle, &context)))
+ if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) {
+ u32 *capbuf_ret = context.ret.pointer;
+ if (context.ret.length > OSC_SUPPORT_TYPE)
+ osc_sb_apei_support_acked =
+ capbuf_ret[OSC_SUPPORT_TYPE] & OSC_SB_APEI_SUPPORT;
kfree(context.ret.pointer);
- /* do we need to check the returned cap? Sounds no */
+ }
+ /* do we need to check other returned cap? Sounds no */
}
/* --------------------------------------------------------------------------
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 1deb2a7..e19527d 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -280,6 +280,8 @@ acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context);
#define OSC_SB_CPUHP_OST_SUPPORT 8
#define OSC_SB_APEI_SUPPORT 16
+extern bool osc_sb_apei_support_acked;
+
/* PCI defined _OSC bits */
/* _OSC DW1 Definition (OS Support Fields) */
#define OSC_EXT_PCI_CONFIG_SUPPORT 1