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OvmfPkg/VirtioNetDxe: negotiate VIRTIO_F_IOMMU_PLATFORM

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VirtioNetDxe driver has been updated to use IOMMU-like member functions
from VIRTIO_DEVICE_PROTOCOL to translate the system physical address to
device address. We do not need to do anything special when
VIRTIO_F_IOMMU_PLATFORM bit is present hence treat it in parallel with
VIRTIO_F_VERSION_1.

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>
Tested-by: Laszlo Ersek <lersek@redhat.com>
This commit is contained in:
Brijesh Singh 2017-09-14 16:22:47 -05:00 committed by Laszlo Ersek
parent 8fa54a8a94
commit f60ed5ab7f
1 changed files with 3 additions and 2 deletions
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5
OvmfPkg/VirtioNetDxe/SnpInitialize.c
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@ -562,7 +562,8 @@ VirtioNetInitialize (
ASSERT (Dev->Snm.MediaPresentSupported ==
!!(Features & VIRTIO_NET_F_STATUS));
Features &= VIRTIO_NET_F_MAC | VIRTIO_NET_F_STATUS | VIRTIO_F_VERSION_1;
Features &= VIRTIO_NET_F_MAC | VIRTIO_NET_F_STATUS | VIRTIO_F_VERSION_1 |
VIRTIO_F_IOMMU_PLATFORM;
//
// In virtio-1.0, feature negotiation is expected to complete before queue
@ -602,7 +603,7 @@ VirtioNetInitialize (
// step 5 -- keep only the features we want
//
if (Dev->VirtIo->Revision < VIRTIO_SPEC_REVISION (1, 0, 0)) {
Features &= ~(UINT64)VIRTIO_F_VERSION_1;
Features &= ~(UINT64)(VIRTIO_F_VERSION_1 | VIRTIO_F_IOMMU_PLATFORM);
Status = Dev->VirtIo->SetGuestFeatures (Dev->VirtIo, Features);
if (EFI_ERROR (Status)) {
goto ReleaseTxRing;