AMD IOMMU: add domain destroy function for IOMMU API

Impact: add a generic function for releasing protection domains

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 6c0bd49cee5f..891d713d9c96 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -1636,4 +1636,25 @@ out_free:
         return -ENOMEM;
 }
 
+static void amd_iommu_domain_destroy(struct iommu_domain *dom)
+{
+        struct protection_domain *domain = dom->priv;
+
+        if (!domain)
+                return;
+
+        if (domain->dev_cnt > 0)
+                cleanup_domain(domain);
+
+        BUG_ON(domain->dev_cnt != 0);
+
+        free_pagetable(domain);
+
+        domain_id_free(domain->id);
+
+        kfree(domain);
+
+        dom->priv = NULL;
+}
+
 #endif