From 3254de6bf74fe94c197c9f819fe62a3a3c36f073 Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Tue, 26 Jul 2016 15:18:54 +0200 Subject: [PATCH] iommu/amd: Update Alias-DTE in update_device_table() Not doing so might cause IO-Page-Faults when a device uses an alias request-id and the alias-dte is left in a lower page-mode which does not cover the address allocated from the iova-allocator. Fixes: 492667dacc0a ('x86/amd-iommu: Remove amd_iommu_pd_table') Cc: stable@vger.kernel.org Signed-off-by: Joerg Roedel --- drivers/iommu/amd_iommu.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index fb43cc5857c7..9703913f6bdd 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -2239,8 +2239,15 @@ static void update_device_table(struct protection_domain *domain) { struct iommu_dev_data *dev_data; - list_for_each_entry(dev_data, &domain->dev_list, list) + list_for_each_entry(dev_data, &domain->dev_list, list) { set_dte_entry(dev_data->devid, domain, dev_data->ats.enabled); + + if (dev_data->devid == dev_data->alias) + continue; + + /* There is an alias, update device table entry for it */ + set_dte_entry(dev_data->alias, domain, dev_data->ats.enabled); + } } static void update_domain(struct protection_domain *domain) -- 2.34.1