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authorAnton Blanchard <anton@samba.org>2012-06-24 22:26:17 +0400
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2012-07-10 13:18:59 +0400
commitd6b9a81b2a45786384f5bd3516bd6ddfb4b772c6 (patch)
tree3d6b8ba13ecd47584959f44d312b2babf64478f6 /arch/powerpc/Kconfig.debug
parenta980349725346ce7e3c1774e327c2f1fdca4593d (diff)
downloadlinux-d6b9a81b2a45786384f5bd3516bd6ddfb4b772c6.tar.xz
powerpc: IOMMU fault injection
Add the ability to inject IOMMU faults. We enable this per device via a fail_iommu sysfs property, similar to fault injection on other subsystems. An example: ... 0003:01:00.1 Ethernet controller: Emulex Corporation OneConnect 10Gb NIC (be3) (rev 02) To inject one error to this device: echo 1 > /sys/bus/pci/devices/0003:01:00.1/fail_iommu echo 1 > /sys/kernel/debug/fail_iommu/probability echo 1 > /sys/kernel/debug/fail_iommu/times As feared, the first failure injected on the be3 results in an unrecoverable error, taking down both functions of the card permanently: be2net 0003:01:00.1: Unrecoverable error in the card Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/Kconfig.debug')
-rw-r--r--arch/powerpc/Kconfig.debug9
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/powerpc/Kconfig.debug b/arch/powerpc/Kconfig.debug
index e5f26890a69e..5416e28a7538 100644
--- a/arch/powerpc/Kconfig.debug
+++ b/arch/powerpc/Kconfig.debug
@@ -331,4 +331,13 @@ config STRICT_DEVMEM
If you are unsure, say Y.
+config FAIL_IOMMU
+ bool "Fault-injection capability for IOMMU"
+ depends on FAULT_INJECTION
+ help
+ Provide fault-injection capability for IOMMU. Each device can
+ be selectively enabled via the fail_iommu property.
+
+ If you are unsure, say N.
+
endmenu