[PATCH 1/2] OvmfPkg/Virtio10: define VIRTIO_F_IOMMU_PLATFORM feature bit

[Brijesh Singh <brijesh.singh@amd.com>]

This feature indicates that the device is behind an IOMMU that translates
bus addresses from the device into physical addresses in memory.  If this
feature bit is set to 0, then the device emits physical addresses which
are not translated further, even though an IOMMU may be present.
see [1] for more infromation

[1] https://lists.oasis-open.org/archives/virtio-dev/201610/msg00121.html

Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
 OvmfPkg/Include/IndustryStandard/Virtio10.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/OvmfPkg/Include/IndustryStandard/Virtio10.h b/OvmfPkg/Include/IndustryStandard/Virtio10.h
index 4c9b62a3cf59..c5efb5cfcb8a 100644
--- a/OvmfPkg/Include/IndustryStandard/Virtio10.h
+++ b/OvmfPkg/Include/IndustryStandard/Virtio10.h
@@ -2,6 +2,7 @@
   Definitions from the VirtIo 1.0 specification (csprd05).
 
   Copyright (C) 2016, Red Hat, Inc.
+  Copyright (C) 2017, AMD, Inc.
 
   This program and the accompanying materials are licensed and made available
   under the terms and conditions of the BSD License which accompanies this
@@ -81,6 +82,7 @@ typedef struct {
 //
 // VirtIo 1.0 reserved (device-independent) feature bits
 //
-#define VIRTIO_F_VERSION_1 BIT32
+#define VIRTIO_F_VERSION_1      BIT32
+#define VIRTIO_F_IOMMU_PLATFORM BIT33
 
 #endif // _VIRTIO_1_0_H_
-- 
2.7.4