iommu/amd: Keep a list of devices in an alias group

Some broken devices might use any request-id from the alias
group, so we need to set a DTE entry for every device in
there. This patch adds creation of those lists.

Signed-off-by: Joerg Roedel <jroedel@suse.de>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index fe6d7cc715f7..8a152564a098 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -93,6 +93,7 @@ static struct dma_map_ops amd_iommu_dma_ops;
 struct iommu_dev_data {
         struct list_head list;            /* For domain->dev_list */
         struct list_head dev_data_list;   /* For global dev_data_list */
+        struct list_head alias_list;      /* Link alias-groups together */
         struct iommu_dev_data *alias_data;/* The alias dev_data */
         struct protection_domain *domain; /* Domain the device is bound to */
         atomic_t bind;                    /* Domain attach reference count */
@@ -135,6 +136,8 @@ static struct iommu_dev_data *alloc_dev_data(u16 devid)
         if (!dev_data)
                 return NULL;
 
+        INIT_LIST_HEAD(&dev_data->alias_list);
+
         dev_data->devid = devid;
         atomic_set(&dev_data->bind, 0);
 
@@ -383,6 +386,9 @@ static int iommu_init_device(struct device *dev)
                         return -ENOTSUPP;
                 }
                 dev_data->alias_data = alias_data;
+
+                /* Add device to the alias_list */
+                list_add(&dev_data->alias_list, &alias_data->alias_list);
         }
 
         ret = init_iommu_group(dev);