[SeaBIOS] Bug#678042: seabios - Please enable Xen support

[Ian Campbell]

On Mon, 2012-07-02 at 13:47 +0400, Michael Tokarev wrote:
> 28.06.2012 14:07, Ian Campbell wrote:
> > On Wed, 2012-06-27 at 12:10 +0100, Ian Campbell wrote:
> >> SeaBIOS using a config derived from xen/tools/firmware/seabios-config
> >> (which is the 1.6.x based config we use) works for me while a config
> >> from "make defconfig" does not. I will investigate further.
> > 
> > CONFIG_USE_SMM is the culprit.
> > 
> > Xen doesn't support SMM mode for HVM guests. Seems like the best option
> > at this point is to disable SMM if usingXen().
> > 
> > I'll also include this in the series I'm about to send out.
> 
> So, what's the bottom line of all this discussion?  Please excuse
> me but I don't understand what it is all about...  And it looks
> like with at least stock 1.7 version of seabios it isn't a good
> idea to make universal image (with xen support included), right?

Right.

I sent out a series which fixed all the issues I discovered in the
course of investigating this bug, including the SMM issue:
http://marc.info/?l=xen-devel&m=134087840707895

> Bastian, what do you think, is it okay to build a separate image
> for xen for now?

Backporting the above fixes if/when they are accepted would be another
option.

FWIW the .config used by xen-unstable to build SeaBIOS 1.6.x is
http://xenbits.xen.org/hg/xen-unstable.hg/file/4f92bdf3370c/tools/firmware/seabios-config

Ian.

-- 
Ian Campbell

The water was not fit to drink.  To make it palatable, we had to add whiskey.
By diligent effort, I learned to like it.
		-- Winston Churchill