From e3e59876e82a5e1a07f365d5474e7b6943524725 Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Thu, 3 Sep 2009 14:02:10 +0200 Subject: [PATCH] x86/amd-iommu: Dump fault entry on DTE error This patch adds code to dump the content of the device table entry which caused an ILLEGAL_DEV_TABLE_ENTRY error from the IOMMU hardware. Signed-off-by: Joerg Roedel --- arch/x86/kernel/amd_iommu.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c index 6c99f5037801..364c6de26374 100644 --- a/arch/x86/kernel/amd_iommu.c +++ b/arch/x86/kernel/amd_iommu.c @@ -138,6 +138,15 @@ static int iommu_has_npcache(struct amd_iommu *iommu) * ****************************************************************************/ +static void dump_dte_entry(u16 devid) +{ + int i; + + for (i = 0; i < 8; ++i) + pr_err("AMD-Vi: DTE[%d]: %08x\n", i, + amd_iommu_dev_table[devid].data[i]); +} + static void iommu_print_event(void *__evt) { u32 *event = __evt; @@ -155,6 +164,7 @@ static void iommu_print_event(void *__evt) "address=0x%016llx flags=0x%04x]\n", PCI_BUS(devid), PCI_SLOT(devid), PCI_FUNC(devid), address, flags); + dump_dte_entry(devid); break; case EVENT_TYPE_IO_FAULT: printk("IO_PAGE_FAULT device=%02x:%02x.%x " -- 2.34.1