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

[Ian Campbell]

On Mon, 2012-07-02 at 11:04 +0100, Ian Campbell wrote:
> 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.

FYI these are now in SeaBIOS mainline... I imagine they would backport
trivially but if you want me to take a look please let me knw!


> 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
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