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>

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index fb43cc5857c761e663c792ce1a34ef9d24582f46..9703913f6bdd8ae79b4a3a21f828c350177bde70 100644 (file)
--- 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)