From 5489403fb00c0421d4c89dcae8a34bf535a3362d Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Wed, 18 Jan 2012 14:03:11 +0100 Subject: [PATCH] iommu/amd: Work around broken IVRS tables On some systems the IVRS table does not contain all PCI devices present in the system. In case a device not present in the IVRS table is translated by the IOMMU no DMA is possible from that device by default. This patch fixes this by removing the DTE entry for every PCI device present in the system and not covered by IVRS. Cc: stable@vger.kernel.org # >= 3.0 Signed-off-by: Joerg Roedel --- drivers/iommu/amd_iommu.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index cce1f03b88953..f75e0608be5bb 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -2863,6 +2863,9 @@ static unsigned device_dma_ops_init(void) for_each_pci_dev(pdev) { if (!check_device(&pdev->dev)) { + + iommu_ignore_device(&pdev->dev); + unhandled += 1; continue; } -- 2.39.5