diff options
Diffstat (limited to 'OvmfPkg/VirtioBlkDxe/VirtioBlk.c')
| -rw-r--r-- | OvmfPkg/VirtioBlkDxe/VirtioBlk.c | 25 |
1 files changed, 20 insertions, 5 deletions
diff --git a/OvmfPkg/VirtioBlkDxe/VirtioBlk.c b/OvmfPkg/VirtioBlkDxe/VirtioBlk.c index 8257effac2..f1c3f87e20 100644 --- a/OvmfPkg/VirtioBlkDxe/VirtioBlk.c +++ b/OvmfPkg/VirtioBlkDxe/VirtioBlk.c @@ -692,6 +692,20 @@ VirtioBlkInit ( }
}
+ Features &= VIRTIO_BLK_F_BLK_SIZE | VIRTIO_BLK_F_TOPOLOGY | VIRTIO_BLK_F_RO |
+ VIRTIO_BLK_F_FLUSH | VIRTIO_F_VERSION_1;
+
+ //
+ // In virtio-1.0, feature negotiation is expected to complete before queue
+ // discovery, and the device can also reject the selected set of features.
+ //
+ if (Dev->VirtIo->Revision >= VIRTIO_SPEC_REVISION (1, 0, 0)) {
+ Status = Virtio10WriteFeatures (Dev->VirtIo, Features, &NextDevStat);
+ if (EFI_ERROR (Status)) {
+ goto Failed;
+ }
+ }
+
//
// step 4b -- allocate virtqueue
//
@@ -739,11 +753,12 @@ VirtioBlkInit ( //
// step 5 -- Report understood features.
//
- Features &= VIRTIO_BLK_F_BLK_SIZE | VIRTIO_BLK_F_TOPOLOGY | VIRTIO_BLK_F_RO |
- VIRTIO_BLK_F_FLUSH;
- Status = Dev->VirtIo->SetGuestFeatures (Dev->VirtIo, Features);
- if (EFI_ERROR (Status)) {
- goto ReleaseQueue;
+ if (Dev->VirtIo->Revision < VIRTIO_SPEC_REVISION (1, 0, 0)) {
+ Features &= ~(UINT64)VIRTIO_F_VERSION_1;
+ Status = Dev->VirtIo->SetGuestFeatures (Dev->VirtIo, Features);
+ if (EFI_ERROR (Status)) {
+ goto ReleaseQueue;
+ }
}
//
|