Branch: refs/heads/master
Home: https://github.com/tianocore/edk2
Commit: f6e19abd978a0c7ad9d5eea11c1db34e2522b2b1
https://github.com/tianocore/edk2/commit/f6e19abd978a0c7ad9d5eea11c1db34e2522b2b1
Author: Pedro Tôrres <[email protected]>
Date: 2025-01-04 (Sat, 04 Jan 2025)
Changed paths:
M OvmfPkg/VirtioSerialDxe/VirtioSerial.c
Log Message:
-----------
OvmfPkg/VirtioSerialDxe: respond CONSOLE_PORT with PORT_OPEN
The VirtIO spec states that "Upon receipt of a
VIRTIO_CONSOLE_CONSOLE_PORT message, the driver SHOULD treat the port in
a manner suitable for text console access and MUST respond with a
VIRTIO_CONSOLE_PORT_OPEN message, which MUST have value set to 1". See
https://docs.oasis-open.org/virtio/virtio/v1.3/virtio-v1.3.html#x1-3330002.
The current driver implementation, however, does not comply with that
and only sends PORT_OPEN messages upon receipt of PORT_OPEN messages.
This causes a problem in platforms like Apple's Virtualization
Framework, where PORT_OPEN messages are not sent back to the driver
after CONSOLE_PORT messages are received by the device, a behaviour that
is compliant with the VirtIO specification.
This patch addresses this issue by always responding CONSOLE_PORT
messages with PORT_OPEN messages.
Signed-off-by: Pedro Tôrres <[email protected]>
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