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>

diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c
index 27300aece203e4adb5846c1d2451cee7966f6231..188b81d56ac40df2613fa5684ea8185063dcf4eb 100644 (file)
--- 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;
        }