Re: [PATCH V2 2/9] ras: acpi/apei: cper: generic error data entry v3 per ACPI 6.1
From: Suzuki K Poulose
Date: Thu Apr 14 2016 - 06:22:56 EST
On 06/04/16 16:12, Tyler Baicar wrote:
Currently when a RAS error is reported it is not timestamped.
The ACPI 6.1 spec adds the timestamp field to the generic error
data entry v3 structure. The timestamp of when the firmware
generated the error is now being reported.
Signed-off-by: Jonathan (Zhixiong) Zhang <zjzhang@xxxxxxxxxxxxxx>
Signed-off-by: Richard Ruigrok <rruigrok@xxxxxxxxxxxxxx>
Signed-off-by: Tyler Baicar <tbaicar@xxxxxxxxxxxxxx>
Signed-off-by: Naveen Kaje <nkaje@xxxxxxxxxxxxxx>
---
drivers/acpi/apei/ghes.c | 35 ++++++++++++--
drivers/firmware/efi/cper.c | 111 +++++++++++++++++++++++++++++++++++++-------
2 files changed, 126 insertions(+), 20 deletions(-)
diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index 9b0543e..a6848706 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -419,7 +419,15 @@ static void ghes_handle_memory_failure(struct acpi_hest_generic_data *gdata, int
int flags = -1;
int sec_sev = ghes_severity(gdata->error_severity);
struct cper_sec_mem_err *mem_err;
- mem_err = (struct cper_sec_mem_err *)(gdata + 1);
+ struct acpi_hest_generic_data_v300 *gdata_v3 = NULL;
+
+ if ((gdata->revision >> 8) >= 0x03)
Could we please make that a macro ? We seem to be using the check everywhere.
+ gdata_v3 = (struct acpi_hest_generic_data_v300 *)gdata;
+
+ if (gdata_v3)
+ mem_err = (struct cper_sec_mem_err *)(gdata_v3 + 1);
+ else
+ mem_err = (struct cper_sec_mem_err *)(gdata + 1);
if (!(mem_err->validation_bits & CPER_MEM_VALID_PA))
return;
@@ -449,14 +457,27 @@ static void ghes_do_proc(struct ghes *ghes,
{
int sev, sec_sev;
struct acpi_hest_generic_data *gdata;
+ struct acpi_hest_generic_data_v300 *gdata_v3 = NULL;
+ uuid_le sec_type;
sev = ghes_severity(estatus->error_severity);
apei_estatus_for_each_section(estatus, gdata) {
sec_sev = ghes_severity(gdata->error_severity);
- if (!uuid_le_cmp(*(uuid_le *)gdata->section_type,
+ sec_type = *(uuid_le *)gdata->section_type;
+
+ if ((gdata->revision >> 8) >= 0x03)
+ gdata_v3 = (struct acpi_hest_generic_data_v300 *)gdata;
+
+ if (!uuid_le_cmp(sec_type,
CPER_SEC_PLATFORM_MEM)) {
struct cper_sec_mem_err *mem_err;
- mem_err = (struct cper_sec_mem_err *)(gdata+1);
+
+ if (gdata_v3)
+ mem_err = (struct cper_sec_mem_err *)
+ (gdata_v3 + 1);
+ else
+ mem_err = (struct cper_sec_mem_err *)
+ (gdata + 1);
ghes_edac_report_mem_error(ghes, sev, mem_err);
arch_apei_report_mem_error(sev, mem_err);
@@ -466,7 +487,13 @@ static void ghes_do_proc(struct ghes *ghes,
else if (!uuid_le_cmp(*(uuid_le *)gdata->section_type,
CPER_SEC_PCIE)) {
struct cper_sec_pcie *pcie_err;
- pcie_err = (struct cper_sec_pcie *)(gdata+1);
+
+ if (gdata_v3)
+ pcie_err = (struct cper_sec_pcie *)
+ (gdata_v3 + 1);
+ else
+ pcie_err = (struct cper_sec_pcie *)
+ (gdata + 1);
if (sev == GHES_SEV_RECOVERABLE &&
sec_sev == GHES_SEV_RECOVERABLE &&
pcie_err->validation_bits & CPER_PCIE_VALID_DEVICE_ID &&
diff --git a/drivers/firmware/efi/cper.c b/drivers/firmware/efi/cper.c
index d425374..23f62962 100644
--- a/drivers/firmware/efi/cper.c
+++ b/drivers/firmware/efi/cper.c
@@ -32,6 +32,8 @@
#include <linux/acpi.h>
#include <linux/pci.h>
#include <linux/aer.h>
+#include <linux/printk.h>
+#include <linux/bcd.h>
#define INDENT_SP " "
@@ -392,6 +394,10 @@ static void cper_estatus_print_section(
uuid_le *sec_type = (uuid_le *)gdata->section_type;
__u16 severity;
char newpfx[64];
+ struct acpi_hest_generic_data_v300 *gdata_v3 = NULL;
+
+ if ((gdata->revision >> 8) >= 0x03)
+ gdata_v3 = (struct acpi_hest_generic_data_v300 *)gdata;
severity = gdata->error_severity;
printk("%s""Error %d, type: %s\n", pfx, sec_no,
@@ -403,14 +409,24 @@ static void cper_estatus_print_section(
snprintf(newpfx, sizeof(newpfx), "%s%s", pfx, INDENT_SP);
if (!uuid_le_cmp(*sec_type, CPER_SEC_PROC_GENERIC)) {
- struct cper_sec_proc_generic *proc_err = (void *)(gdata + 1);
+ struct cper_sec_proc_generic *proc_err;
+
+ if (gdata_v3)
+ proc_err = (void *)(gdata_v3 + 1);
+ else
+ proc_err = (void *)(gdata + 1);
printk("%s""section_type: general processor error\n", newpfx);
if (gdata->error_data_length >= sizeof(*proc_err))
cper_print_proc_generic(newpfx, proc_err);
else
goto err_section_too_small;
} else if (!uuid_le_cmp(*sec_type, CPER_SEC_PLATFORM_MEM)) {
- struct cper_sec_mem_err *mem_err = (void *)(gdata + 1);
+ struct cper_sec_mem_err *mem_err;
+
+ if (gdata_v3)
+ mem_err = (void *)(gdata_v3 + 1);
+ else
+ mem_err = (void *)(gdata + 1);
printk("%s""section_type: memory error\n", newpfx);
if (gdata->error_data_length >=
sizeof(struct cper_sec_mem_err_old))
@@ -419,7 +435,12 @@ static void cper_estatus_print_section(
else
goto err_section_too_small;
} else if (!uuid_le_cmp(*sec_type, CPER_SEC_PCIE)) {
- struct cper_sec_pcie *pcie = (void *)(gdata + 1);
+ struct cper_sec_pcie *pcie;
+
+ if (gdata_v3)
+ pcie = (void *)(gdata_v3 + 1);
+ else
+ pcie = (void *)(gdata + 1);
The only use of the gdata_v3 above cases is to get the payload(or error_record).
So instead of spilling these checks all over could we use something like :
#define acpi_hest_generic_data_version(gdata) \
(gdata->revision >> 8)
static inline void *
acpi_hest_generic_data_payload(struct acpi_hest_generic_data *gdata)
{
return acpi_hest_generic_data_version(gdata) >= 3 ?
((struct acpi_hest_generic_data_v300 *)(gdata)) + 1 :
gdata + 1;
}
And then do :
void *payload = acpi_hest_generic_data_payload(gdata);
printk("%s""section_type: PCIe error\n", newpfx);
if (gdata->error_data_length >= sizeof(*pcie))
cper_print_pcie(newpfx, pcie, gdata);
@@ -434,10 +455,38 @@ err_section_too_small:
pr_err(FW_WARN "error section length is too small\n");
}
+static void cper_estatus_print_section_v300(const char *pfx,
+ const struct acpi_hest_generic_data_v300 *gdata, int sec_no)
+{
+ __u8 hour, min, sec, day, mon, year, century, *timestamp;
+
+ if (gdata->validation_bits & ACPI_HEST_GEN_VALID_TIMESTAMP) {
+ timestamp = (__u8 *)&(gdata->time_stamp);
+ memcpy(&sec, timestamp, 1);
+ memcpy(&min, timestamp + 1, 1);
+ memcpy(&hour, timestamp + 2, 1);
+ memcpy(&day, timestamp + 4, 1);
+ memcpy(&mon, timestamp + 5, 1);
+ memcpy(&year, timestamp + 6, 1);
+ memcpy(¢ury, timestamp + 7, 1);
+ printk("%stime: ", pfx);
+ printk("%7s", 0x01 & *(timestamp + 3) ? "precise" : "");
+ printk(" %02d:%02d:%02d %02d%02d-%02d-%02d\n",
+ bcd2bin(hour), bcd2bin(min), bcd2bin(sec),
+ bcd2bin(century), bcd2bin(year), bcd2bin(mon),
+ bcd2bin(day));
+ }
+
+ cper_estatus_print_section(pfx,
+ (const struct acpi_hest_generic_data *)gdata,
+ sec_no);
+}
Wouldn't it be better do the v3 header check from cper_erstatus_print_section() and call out
to cper_erstatus_print_section_v300() ? That way, we can leave the callers unaffected,
even for future changes.
+ if (gdata_v3) {
+ while (data_len >= sizeof(*gdata_v3)) {
+ gedata_len = gdata_v3->error_data_length;
+ cper_estatus_print_section_v300(newpfx, gdata_v3,
+ sec_no);
+ data_len -= gedata_len + sizeof(*gdata_v3);
+ gdata_v3 = (void *)(gdata_v3 + 1) + gedata_len;
+ sec_no++;
+ }
+ } else {
+ while (data_len >= sizeof(*gdata)) {
+ gedata_len = gdata->error_data_length;
+ cper_estatus_print_section(newpfx, gdata, sec_no);
+ data_len -= gedata_len + sizeof(*gdata);
+ gdata = (void *)(gdata + 1) + gedata_len;
+ sec_no++;
+ }
With the change mentioned above and storing the sizeof(), we could make this
hunk a bit more cleaner.
Suzuki