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authorJoerg Roedel <jroedel@suse.de>2016-07-26 15:18:54 +0200
committerJoerg Roedel <jroedel@suse.de>2016-07-26 15:55:57 +0200
commit3254de6bf74fe94c197c9f819fe62a3a3c36f073 (patch)
treefc0a10176d1e30a47439a263e7404468f90f04fb /drivers/iommu
parentb3311b061de2e51db683a67092546876839df532 (diff)
downloadlinux-3254de6bf74fe94c197c9f819fe62a3a3c36f073.tar.bz2
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 <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/amd_iommu.c9
1 files changed, 8 insertions, 1 deletions
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)