Commit e778ffef authored by Fabio M. De Francesco's avatar Fabio M. De Francesco Committed by Rafael J. Wysocki
Browse files

ACPI: extlog: Trace CPER PCI Express Error Section 



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: default avatarDave Jiang <dave.jiang@intel.com>
Reviewed-by: default avatarJonathan Cameron <jonathan.cameron@huawei.com>
Signed-off-by: default avatarFabio 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: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent a2995f7d

drivers/acpi/acpi_extlog.c

+34 −0
Original line number Diff line number Diff line
@@ -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);

drivers/pci/pcie/aer.c

+1 −1
Original line number Diff line number Diff line
@@ -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