First, break the PCIe AER handling out into its own function to separate
it from the standard GHES processing
Then fix the AER handling to process all errors in the AER driver rather
than only handling recoverable errors.
V4: Rebase to 4.15-rc1 and add reviewed-by
Tyler Baicar (2):
acpi: apei: handle PCIe AER errors in separate function
acpi: apei: call into AER handling regardless of severity
drivers/acpi/apei/ghes.c | 76 +++++++++++++++++++++++++++++-------------------
1 file changed, 46 insertions(+), 30 deletions(-)
--
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a Linux Foundation Collaborative Project.
From 1586768535842098824@xxx Thu Dec 14 14:06:38 +0000 2017
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Move PCIe AER error handling code into a separate function.
Signed-off-by: Tyler Baicar <[email protected]>
Reviewed-by: Borislav Petkov <[email protected]>
---
drivers/acpi/apei/ghes.c | 64 +++++++++++++++++++++++++-----------------------
1 file changed, 34 insertions(+), 30 deletions(-)
diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index 6402f7f..f67eb76 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -414,6 +414,39 @@ static void ghes_handle_memory_failure(struct acpi_hest_generic_data *gdata, int
#endif
}
+static void ghes_handle_aer(struct acpi_hest_generic_data *gdata, int sev, int sec_sev)
+{
+#ifdef CONFIG_ACPI_APEI_PCIEAER
+ struct cper_sec_pcie *pcie_err = acpi_hest_get_payload(gdata);
+
+ if (sev == GHES_SEV_RECOVERABLE &&
+ sec_sev == GHES_SEV_RECOVERABLE &&
+ pcie_err->validation_bits & CPER_PCIE_VALID_DEVICE_ID &&
+ pcie_err->validation_bits & CPER_PCIE_VALID_AER_INFO) {
+ unsigned int devfn;
+ int aer_severity;
+
+ devfn = PCI_DEVFN(pcie_err->device_id.device,
+ pcie_err->device_id.function);
+ aer_severity = cper_severity_to_aer(gdata->error_severity);
+
+ /*
+ * If firmware reset the component to contain
+ * the error, we must reinitialize it before
+ * use, so treat it as a fatal AER error.
+ */
+ if (gdata->flags & CPER_SEC_RESET)
+ aer_severity = AER_FATAL;
+
+ aer_recover_queue(pcie_err->device_id.segment,
+ pcie_err->device_id.bus,
+ devfn, aer_severity,
+ (struct aer_capability_regs *)
+ pcie_err->aer_info);
+ }
+#endif
+}
+
static void ghes_do_proc(struct ghes *ghes,
const struct acpi_hest_generic_status *estatus)
{
@@ -441,38 +474,9 @@ static void ghes_do_proc(struct ghes *ghes,
arch_apei_report_mem_error(sev, mem_err);
ghes_handle_memory_failure(gdata, sev);
}
-#ifdef CONFIG_ACPI_APEI_PCIEAER
else if (guid_equal(sec_type, &CPER_SEC_PCIE)) {
- struct cper_sec_pcie *pcie_err = acpi_hest_get_payload(gdata);
-
- if (sev == GHES_SEV_RECOVERABLE &&
- sec_sev == GHES_SEV_RECOVERABLE &&
- pcie_err->validation_bits & CPER_PCIE_VALID_DEVICE_ID &&
- pcie_err->validation_bits & CPER_PCIE_VALID_AER_INFO) {
- unsigned int devfn;
- int aer_severity;
-
- devfn = PCI_DEVFN(pcie_err->device_id.device,
- pcie_err->device_id.function);
- aer_severity = cper_severity_to_aer(gdata->error_severity);
-
- /*
- * If firmware reset the component to contain
- * the error, we must reinitialize it before
- * use, so treat it as a fatal AER error.
- */
- if (gdata->flags & CPER_SEC_RESET)
- aer_severity = AER_FATAL;
-
- aer_recover_queue(pcie_err->device_id.segment,
- pcie_err->device_id.bus,
- devfn, aer_severity,
- (struct aer_capability_regs *)
- pcie_err->aer_info);
- }
-
+ ghes_handle_aer(gdata, sev, sec_sev);
}
-#endif
else if (guid_equal(sec_type, &CPER_SEC_PROC_ARM)) {
struct cper_sec_proc_arm *err = acpi_hest_get_payload(gdata);
--
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Qualcomm Technologies, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project.
From 1585380915679044800@xxx Wed Nov 29 06:31:01 +0000 2017
X-GM-THRID: 1584463326614035138
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Currently the GHES code only calls into the AER driver for
recoverable type errors. This is incorrect because errors of
other severities do not get logged by the AER driver and do not
get exposed to user space via the AER trace event. So, call
into the AER driver for PCIe errors regardless of the severity
Signed-off-by: Tyler Baicar <[email protected]>
Reviewed-by: Borislav Petkov <[email protected]>
---
drivers/acpi/apei/ghes.c | 22 +++++++++++++++++-----
1 file changed, 17 insertions(+), 5 deletions(-)
diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index f67eb76..cc65d19 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -414,14 +414,26 @@ static void ghes_handle_memory_failure(struct acpi_hest_generic_data *gdata, int
#endif
}
-static void ghes_handle_aer(struct acpi_hest_generic_data *gdata, int sev, int sec_sev)
+/*
+ * PCIe AER errors need to be sent to the AER driver for reporting and
+ * recovery. The GHES severities map to the following AER severities and
+ * require the following handling:
+ *
+ * GHES_SEV_CORRECTABLE -> AER_CORRECTABLE
+ * These need to be reported by the AER driver but no recovery is
+ * necessary.
+ * GHES_SEV_RECOVERABLE -> AER_NONFATAL
+ * GHES_SEV_RECOVERABLE && CPER_SEC_RESET -> AER_FATAL
+ * These both need to be reported and recovered from by the AER driver.
+ * GHES_SEV_PANIC does not make it to this handling since the kernel must
+ * panic.
+ */
+static void ghes_handle_aer(struct acpi_hest_generic_data *gdata)
{
#ifdef CONFIG_ACPI_APEI_PCIEAER
struct cper_sec_pcie *pcie_err = acpi_hest_get_payload(gdata);
- if (sev == GHES_SEV_RECOVERABLE &&
- sec_sev == GHES_SEV_RECOVERABLE &&
- pcie_err->validation_bits & CPER_PCIE_VALID_DEVICE_ID &&
+ if (pcie_err->validation_bits & CPER_PCIE_VALID_DEVICE_ID &&
pcie_err->validation_bits & CPER_PCIE_VALID_AER_INFO) {
unsigned int devfn;
int aer_severity;
@@ -475,7 +487,7 @@ static void ghes_do_proc(struct ghes *ghes,
ghes_handle_memory_failure(gdata, sev);
}
else if (guid_equal(sec_type, &CPER_SEC_PCIE)) {
- ghes_handle_aer(gdata, sev, sec_sev);
+ ghes_handle_aer(gdata);
}
else if (guid_equal(sec_type, &CPER_SEC_PROC_ARM)) {
struct cper_sec_proc_arm *err = acpi_hest_get_payload(gdata);
--
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project.
From 1585315692331157663@xxx Tue Nov 28 13:14:19 +0000 2017
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