trace, RAS: Add eMCA trace event interface
Add trace interface to elaborate all H/W error related information.
Signed-off-by: Chen, Gong <gong.chen@linux.intel.com>
Acked-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index a34a228..206942b 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -370,6 +370,7 @@
tristate "Extended Error Log support"
depends on X86_MCE && X86_LOCAL_APIC
select UEFI_CPER
+ select RAS
default n
help
Certain usages such as Predictive Failure Analysis (PFA) require
@@ -384,6 +385,7 @@
Enhanced MCA Logging allows firmware to provide additional error
information to system software, synchronous with MCE or CMCI. This
- driver adds support for that functionality.
+ driver adds support for that functionality with corresponding
+ tracepoint which carries that information to userspace.
endif # ACPI
diff --git a/drivers/acpi/acpi_extlog.c b/drivers/acpi/acpi_extlog.c
index 1853341..e61da95 100644
--- a/drivers/acpi/acpi_extlog.c
+++ b/drivers/acpi/acpi_extlog.c
@@ -16,6 +16,7 @@
#include <asm/mce.h>
#include "apei/apei-internal.h"
+#include <ras/ras_event.h>
#define EXT_ELOG_ENTRY_MASK GENMASK_ULL(51, 0) /* elog entry address mask */
@@ -137,8 +138,12 @@
struct mce *mce = (struct mce *)data;
int bank = mce->bank;
int cpu = mce->extcpu;
- struct acpi_generic_status *estatus;
- int rc;
+ struct acpi_generic_status *estatus, *tmp;
+ struct acpi_generic_data *gdata;
+ const uuid_le *fru_id = &NULL_UUID_LE;
+ char *fru_text = "";
+ uuid_le *sec_type;
+ static u32 err_seq;
estatus = extlog_elog_entry_check(cpu, bank);
if (estatus == NULL)
@@ -148,7 +153,23 @@
/* clear record status to enable BIOS to update it again */
estatus->block_status = 0;
- rc = print_extlog_rcd(NULL, (struct acpi_generic_status *)elog_buf, cpu);
+ tmp = (struct acpi_generic_status *)elog_buf;
+ print_extlog_rcd(NULL, tmp, cpu);
+
+ /* log event via trace */
+ err_seq++;
+ gdata = (struct acpi_generic_data *)(tmp + 1);
+ if (gdata->validation_bits & CPER_SEC_VALID_FRU_ID)
+ fru_id = (uuid_le *)gdata->fru_id;
+ if (gdata->validation_bits & CPER_SEC_VALID_FRU_TEXT)
+ fru_text = gdata->fru_text;
+ sec_type = (uuid_le *)gdata->section_type;
+ if (!uuid_le_cmp(*sec_type, CPER_SEC_PLATFORM_MEM)) {
+ struct cper_sec_mem_err *mem = (void *)(gdata + 1);
+ if (gdata->error_data_length >= sizeof(*mem))
+ trace_extlog_mem_event(mem, err_seq, fru_id, fru_text,
+ (u8)gdata->error_severity);
+ }
return NOTIFY_STOP;
}