walkaround, pls. add aerdriver.forceload=y to kernel boot parameter line
when booting kernel. Note that forceload=n by default.
+nosourceid, another parameter of type bool, can be used when broken
+hardware (mostly chipsets) has root ports that cannot obtain the reporting
+source ID. nosourceid=n by default.
+
2.3 AER error output
When a PCI-E AER error is captured, an error message will be outputed to
console. If it's a correctable error, it is outputed as a warning.
3.3 helper functions
-3.3.1 int pci_find_aer_capability(struct pci_dev *dev);
-pci_find_aer_capability locates the PCI Express AER capability
-in the device configuration space. If the device doesn't support
-PCI-Express AER, the function returns 0.
-
-3.3.2 int pci_enable_pcie_error_reporting(struct pci_dev *dev);
+3.3.1 int pci_enable_pcie_error_reporting(struct pci_dev *dev);
pci_enable_pcie_error_reporting enables the device to send error
messages to root port when an error is detected. Note that devices
don't enable the error reporting by default, so device drivers need
call this function to enable it.
-3.3.3 int pci_disable_pcie_error_reporting(struct pci_dev *dev);
+3.3.2 int pci_disable_pcie_error_reporting(struct pci_dev *dev);
pci_disable_pcie_error_reporting disables the device to send error
messages to root port when an error is detected.
-3.3.4 int pci_cleanup_aer_uncorrect_error_status(struct pci_dev *dev);
+3.3.3 int pci_cleanup_aer_uncorrect_error_status(struct pci_dev *dev);
pci_cleanup_aer_uncorrect_error_status cleanups the uncorrectable
error status register.
A: It could call the helper functions to enable AER in devices and
cleanup uncorrectable status register. Pls. refer to section 3.3.
+
+4. Software error injection
+
+Debugging PCIE AER error recovery code is quite difficult because it
+is hard to trigger real hardware errors. Software based error
+injection can be used to fake various kinds of PCIE errors.
+
+First you should enable PCIE AER software error injection in kernel
+configuration, that is, following item should be in your .config.
+
+CONFIG_PCIEAER_INJECT=y or CONFIG_PCIEAER_INJECT=m
+
+After reboot with new kernel or insert the module, a device file named
+/dev/aer_inject should be created.
+
+Then, you need a user space tool named aer-inject, which can be gotten
+from:
+ http://www.kernel.org/pub/linux/utils/pci/aer-inject/
+
+More information about aer-inject can be found in the document comes
+with its source code.