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OvmfPkg/VirtioMmioDeviceLib: Add virtio 1.0 detection.

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Add #defines for the Version field.  Read and store the version,
log the version found as info message.

Continue to return UNSUPPORTED for now, we need some more patches
to complete virtio 1.0 support first.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Philippe Mathieu-Daude <philmd@redhat.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
This commit is contained in:
Gerd Hoffmann
2021-08-27 21:44:54 +08:00
committed by mergify[bot]
parent 94e465e5cb
commit 08293e43da
2 changed files with 17 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

17
OvmfPkg/Library/VirtioMmioDeviceLib/VirtioMmioDevice.c
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@@ -58,7 +58,6 @@ VirtioMmioInit (
)
{
UINT32 MagicValue;
UINT32 Version;
//
// Initialize VirtIo Mmio Device
@@ -66,7 +65,6 @@ VirtioMmioInit (
CopyMem (&Device->VirtioDevice, &mMmioDeviceProtocolTemplate,
sizeof (VIRTIO_DEVICE_PROTOCOL));
Device->BaseAddress = BaseAddress;
Device->VirtioDevice.Revision = VIRTIO_SPEC_REVISION (0, 9, 5);
Device->VirtioDevice.SubSystemDeviceId =
MmioRead32 (BaseAddress + VIRTIO_MMIO_OFFSET_DEVICE_ID);
@@ -78,8 +76,19 @@ VirtioMmioInit (
return EFI_UNSUPPORTED;
}
Version = VIRTIO_CFG_READ (Device, VIRTIO_MMIO_OFFSET_VERSION);
if (Version != 1) {
Device->Version = VIRTIO_CFG_READ (Device, VIRTIO_MMIO_OFFSET_VERSION);
switch (Device->Version) {
case VIRTIO_MMIO_DEVICE_VERSION_0_95:
DEBUG ((DEBUG_INFO, "%a virtio 0.9.5, id %d\n", __FUNCTION__,
Device->VirtioDevice.SubSystemDeviceId));
Device->VirtioDevice.Revision = VIRTIO_SPEC_REVISION (0, 9, 5);
break;
case VIRTIO_MMIO_DEVICE_VERSION_1_00:
DEBUG ((DEBUG_INFO, "%a virtio 1.0, id %d\n", __FUNCTION__,
Device->VirtioDevice.SubSystemDeviceId));
Device->VirtioDevice.Revision = VIRTIO_SPEC_REVISION (1, 0, 0);
return EFI_UNSUPPORTED;
default:
return EFI_UNSUPPORTED;
}