[syslinux] virtio console support feasible?

H. Peter Anvin hpa at zytor.com
Wed Aug 28 10:35:50 PDT 2013

On 08/22/2013 10:12 AM, Ferenc Wagner wrote:
> Hi,
> I boot lots of headless virtual machines through Syslinux, and it
> bothers me that serial emulation must be turned on for the sake of
> bootloader interaction only.  Would it be feasible to add virtio console
> support to Syslinux besides VGA and serial console?  Some PCI utility
> functions are certainly there, but is the current architecture up to
> early PCI I/O?  Or is this something that the BIOS should emulate, just
> like it makes virtio disks accessible via standard interrupts?

BIOS emulation would definitely be better.  virtio is really not the
best protocol for console access (it is much too heavyweight), but it is
definitely *doable*.


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