I/O Machine Check Architecture events may signal failing PCIe components or links. The AER event contains details on what was happening on the wire when the error was signaled.
Trace the CPER PCIe Error section (UEFI v2.10, Appendix N.2.7) reported by the I/O MCA. Cc: Dan Williams <dan.j.willi...@intel.com> Reviewed-by: Dave Jiang <dave.ji...@intel.com> Signed-off-by: Fabio M. De Francesco <fabio.m.de.france...@linux.intel.com> --- drivers/acpi/Kconfig | 1 + drivers/acpi/acpi_extlog.c | 32 ++++++++++++++++++++++++++++++++ drivers/pci/pcie/aer.c | 2 +- 3 files changed, 34 insertions(+), 1 deletion(-) diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig index 7bc40c2735ac0..2bbd9e4868ad7 100644 --- a/drivers/acpi/Kconfig +++ b/drivers/acpi/Kconfig @@ -493,6 +493,7 @@ config ACPI_EXTLOG tristate "Extended Error Log support" depends on X86_MCE && X86_LOCAL_APIC && EDAC select UEFI_CPER + select ACPI_APEI_PCIEAER help Certain usages such as Predictive Failure Analysis (PFA) require more information about the error than what can be described in diff --git a/drivers/acpi/acpi_extlog.c b/drivers/acpi/acpi_extlog.c index 47d11cb5c9120..cefe8d2d8affc 100644 --- a/drivers/acpi/acpi_extlog.c +++ b/drivers/acpi/acpi_extlog.c @@ -132,6 +132,34 @@ static int print_extlog_rcd(const char *pfx, return 1; } +static void extlog_print_pcie(struct cper_sec_pcie *pcie_err, + int severity) +{ + struct aer_capability_regs *aer; + struct pci_dev *pdev; + unsigned int devfn; + unsigned int bus; + int aer_severity; + int domain; + + if (!(pcie_err->validation_bits & CPER_PCIE_VALID_DEVICE_ID || + pcie_err->validation_bits & CPER_PCIE_VALID_AER_INFO)) + return; + + aer_severity = cper_severity_to_aer(severity); + aer = (struct aer_capability_regs *)pcie_err->aer_info; + domain = pcie_err->device_id.segment; + bus = pcie_err->device_id.bus; + devfn = PCI_DEVFN(pcie_err->device_id.device, + pcie_err->device_id.function); + pdev = pci_get_domain_bus_and_slot(domain, bus, devfn); + if (!pdev) + return; + + pci_print_aer(pdev, aer_severity, aer); + pci_dev_put(pdev); +} + static int extlog_print(struct notifier_block *nb, unsigned long val, void *data) { @@ -183,6 +211,10 @@ static int extlog_print(struct notifier_block *nb, unsigned long val, if (gdata->error_data_length >= sizeof(*mem)) trace_extlog_mem_event(mem, err_seq, fru_id, fru_text, (u8)gdata->error_severity); + } else if (guid_equal(sec_type, &CPER_SEC_PCIE)) { + struct cper_sec_pcie *pcie_err = acpi_hest_get_payload(gdata); + + extlog_print_pcie(pcie_err, gdata->error_severity); } else { void *err = acpi_hest_get_payload(gdata); diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c index 70ac661883672..f019d12b89662 100644 --- a/drivers/pci/pcie/aer.c +++ b/drivers/pci/pcie/aer.c @@ -940,7 +940,7 @@ void pci_print_aer(struct pci_dev *dev, int aer_severity, pcie_print_tlp_log(dev, &aer->header_log, info.level, dev_fmt(" ")); } -EXPORT_SYMBOL_NS_GPL(pci_print_aer, "CXL"); +EXPORT_SYMBOL_GPL(pci_print_aer); /** * add_error_device - list device to be handled -- 2.49.0