Re: [kvm-devel] [RFC] linuxboot Option ROM for Linux kernel booting

[Anthony L. <ali...@us...>]

Nguyen Anh Quynh wrote:
> Hi,
>
> This should be submitted to upstream (but not to kvm-devel list), but
> this is only the test code that I want to quickly send out for
> comments. In case it looks OK, I will send it to upstream later.
>
> Inspired by extboot and conversations with Anthony and HPA, this
> linuxboot option ROM is a simple option ROM that intercepts int19 in
> order to execute linux setup code. This approach eliminates the need
> to manipulate the boot sector for this purpose.
>
> To test it, just load linux kernel with your KVM/QEMU image using
> -kernel option in normal way.
>
> I succesfully compiled and tested it with kvm-66 on Ubuntu 7.10, guest
> Ubuntu 8.04.
>   

For the next rounds, could you actually rebase against upstream QEMU and 
submit to qemu-devel?  One of Paul Brook's objections to extboot had 
historically been that it wasn't not easily sharable with other 
architectures.  With a C version, it seems more reasonable now to do that.

Make sure you remove all the old linux boot code too within QEMU along 
with the -hda checks.

Regards,

Anthony Liguori

> Thanks,
> Quynh
>
>
> # diffstat linuxboot1.diff
>  Makefile             |   13 ++++-
>  linuxboot/Makefile   |   40 +++++++++++++++
>  linuxboot/boot.S     |   54 +++++++++++++++++++++
>  linuxboot/farvar.h   |  130 +++++++++++++++++++++++++++++++++++++++++++++++++++
>  linuxboot/rom.c      |  104 ++++++++++++++++++++++++++++++++++++++++
>  linuxboot/signrom    |binary
>  linuxboot/signrom.c  |  128 ++++++++++++++++++++++++++++++++++++++++++++++++++
>  linuxboot/util.h     |   69 +++++++++++++++++++++++++++
>  qemu/Makefile        |    3 -
>  qemu/Makefile.target |    2
>  qemu/hw/linuxboot.c  |   39 +++++++++++++++
>  qemu/hw/pc.c         |   22 +++++++-
>  qemu/hw/pc.h         |    5 +
>  13 files changed, 600 insertions(+), 9 deletions(-)
>