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ACPI: extlog: Trace CPER PCI Express Error Section

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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 v2.11, Appendix N.2.7) reported
by the I/O MCA.

Reviewed-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Signed-off-by: Fabio M. De Francesco <fabio.m.de.francesco@linux.intel.com>
Link: https://patch.msgid.link/20260114101543.85926-3-fabio.m.de.francesco@linux.intel.com
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Fabio M. De Francesco 2026-01-14 11:14:22 +01:00 • committed by Rafael J. Wysocki
parent a2995f7dab
commit e778ffefa3
2 changed files with 35 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

34
drivers/acpi/acpi_extlog.c
View file

@ -132,6 +132,36 @@ static int print_extlog_rcd(const char *pfx,
return 1;
}
static void extlog_print_pcie(struct cper_sec_pcie *pcie_err,
int severity)
{
#ifdef ACPI_APEI_PCIEAER
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);
#endif
}
static int extlog_print(struct notifier_block *nb, unsigned long val,
void *data)
{
@ -183,6 +213,10 @@ 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);

2
drivers/pci/pcie/aer.c
View file

@ -973,7 +973,7 @@ 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