iommu/amd: Support IOMMU_DOMAIN_IDENTITY type allocation

Add support to allocate direct mapped domains through the
IOMMU-API.

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

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 27300aece203..188b81d56ac4 100644
--- a/drivers/iommu/amd_iommu.c
+++ b/drivers/iommu/amd_iommu.c
@@ -2996,6 +2996,13 @@ static struct iommu_domain *amd_iommu_domain_alloc(unsigned type)
                 }
                 pdomain = &dma_domain->domain;
                 break;
+        case IOMMU_DOMAIN_IDENTITY:
+                pdomain = protection_domain_alloc();
+                if (!pdomain)
+                        return NULL;
+
+                pdomain->mode = PAGE_MODE_NONE;
+                break;
         default:
                 return NULL;
         }