From: Joerg Roedel <jroedel@suse.de>
Date: Thu, 28 May 2015 16:41:41 +0000 (+0200)
Subject: iommu/amd: Support IOMMU_DOMAIN_IDENTITY type allocation
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=07f643a35d6b50f0f091444f07db1353188e787e;p=linux-beck.git

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 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;
 	}