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>

diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 6c0bd49cee5f25dfcbf22066168dd9cac4284657..891d713d9c96ccc810c7d0801c05bfad9789d980 100644 (file)
--- 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