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>

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index fe6d7cc715f7b95546de4aec57496ffe305c3332..8a152564a0982f89c46dd5b42ffb26d3234e8059 100644 (file)
--- 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);