Re: [Qemu-devel] Booting from VirtIO disk

[Stefan Hajnoczi]

2010/12/8 अनुज <address@hidden>:
> Hi list
>
> I got confused after observing that there is no support for VirtIO
> block devices in Seabios supplied with Qemu-0.12.3. But still it can
> accept a VirtIO disk as a bootable device and perfectly boots from it.
> Then How it's done?
>
> But I can see the VirtIO block device code in Seabios source supplied
> with Qemu-0.13.0.

Before SeaBIOS had native support for virtio-blk there was the extboot
option ROM which could boot from virtio-blk devices by reading a
special I/O port (it does not speak virtio-blk, see qemu-kvm.git
hw/extboot.c).

Stefan