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OvmfPkg/Virtio10: define VIRTIO_F_IOMMU_PLATFORM feature bit 

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

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>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Regression-tested-by: Laszlo Ersek <lersek@redhat.com>
This commit is contained in:
Brijesh Singh 2017-08-25 06:37:46 -04:00 committed by Laszlo Ersek
parent 0b9c0c6540
commit 4fb268029e
1 changed files with 3 additions and 1 deletions
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2
OvmfPkg/Include/IndustryStandard/Virtio10.h
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@ -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
@ -82,5 +83,6 @@ typedef struct {
// VirtIo 1.0 reserved (device-independent) feature bits
//
#define VIRTIO_F_VERSION_1 BIT32
#define VIRTIO_F_IOMMU_PLATFORM BIT33
#endif // _VIRTIO_1_0_H_