This is useful to be able to freeze a specific version of SeaBIOS to
prevent guest visible changes between BIOS updates. This is currently
not possible since the extension byte 2 provided by SeaBIOS does not
set the VM bit, whereas QEMU sets it unconditionally.
Allowing to clear it also seems useful if we want to hide the fact that
the guest system is running inside a virtual machine.
Signed-off-by: Daniil Tatianin <d-tatianin@yandex-team.ru>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-ID: <20250724195409.43499-1-d-tatianin@yandex-team.ru>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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