From d6b9a81b2a45786384f5bd3516bd6ddfb4b772c6 Mon Sep 17 00:00:00 2001 From: Anton Blanchard Date: Sun, 24 Jun 2012 18:26:17 +0000 Subject: 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 Signed-off-by: Benjamin Herrenschmidt --- arch/powerpc/include/asm/device.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'arch/powerpc/include') diff --git a/arch/powerpc/include/asm/device.h b/arch/powerpc/include/asm/device.h index 63d5ca49cece..77e97dd0c15d 100644 --- a/arch/powerpc/include/asm/device.h +++ b/arch/powerpc/include/asm/device.h @@ -34,6 +34,9 @@ struct dev_archdata { #ifdef CONFIG_EEH struct eeh_dev *edev; #endif +#ifdef CONFIG_FAIL_IOMMU + int fail_iommu; +#endif }; struct pdev_archdata { -- cgit v1.2.1