iommu/amd: Update Alias-DTE in update_device_table()

commit 3254de6bf74fe94c197c9f819fe62a3a3c36f073 upstream.

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')
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index e54e335d082b32d29f1d764a35fd0d729a67f8c4..0397985a260128c6054513a22133adafd460991c 100644 (file)
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -2324,8 +2324,15 @@ 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)