audk/OvmfPkg/VirtioRngDxe
Laszlo Ersek 0a781bdc7f OvmfPkg: VirtioRngDxe: adapt feature negotiation to virtio-1.0
Relative to virtio-0.9.5, virtio-1.0 reverses the order of queue discovery
and feature negotiation. In virtio-1.0, feature negotiation has to
complete first, and the device can also reject a self-inconsistent feature
request through the new VSTAT_FEATURES_OK status bit. (For example if the
driver requests a higher level feature but clears a prerequisite feature.)

Furthermore, we retain the VIRTIO_F_VERSION_1 feature bit if the
VIRTIO_DEVICE_PROTOCOL provider has high enough revision.

Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
2016-04-06 19:21:50 +02:00
..
VirtioRng.c OvmfPkg: VirtioRngDxe: adapt feature negotiation to virtio-1.0 2016-04-06 19:21:50 +02:00
VirtioRng.h OvmfPkg: implement UEFI driver for Virtio RNG devices 2016-02-24 12:07:32 +01:00
VirtioRng.inf OvmfPkg: implement UEFI driver for Virtio RNG devices 2016-02-24 12:07:32 +01:00