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authorHuang Ying <ying.huang@intel.com>2009-04-24 10:45:31 +0800
committerJesse Barnes <jbarnes@virtuousgeek.org>2009-06-16 14:29:34 -0700
commitbfe5a7401785f864a4f30b4f066bfa045a28b9f6 (patch)
tree8642a8ec3a4a6639d0e55817b43210137d3b332b /Documentation/PCI
parent634deb028c9188b4144863ea87dde5457fb93e92 (diff)
PCI: PCIE AER: Document for PCIE AER software error injection
This patch adds a minimal HOWTO for PCIE AER software error injection in Documentation/PCI/pcieaer-howto.txt. Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'Documentation/PCI')
-rw-r--r--Documentation/PCI/pcieaer-howto.txt21
1 files changed, 21 insertions, 0 deletions
diff --git a/Documentation/PCI/pcieaer-howto.txt b/Documentation/PCI/pcieaer-howto.txt
index ddeb14beacc8..f6b1ba7464dc 100644
--- a/Documentation/PCI/pcieaer-howto.txt
+++ b/Documentation/PCI/pcieaer-howto.txt
@@ -246,3 +246,24 @@ with the PCI Express AER Root driver?
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/kernel/people/yhuang/
+
+More information about aer-inject can be found in the document comes
+with its source code.

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