Re: [Xen-devel] [SeaBIOS] SeaBIOS causing Xen HVM VCPU Triple fault

[Ian Campbell <ijc@xxxxxxxxxxxxxx>]

On Thu, 2014-02-06 at 10:01 +0000, Jan Beulich wrote:
> >>> On 06.02.14 at 09:36, Ian Campbell <ijc@xxxxxxxxxxxxxx> wrote:
> > (adding xen-devel too) 
> > On Thu, 2014-02-06 at 09:31 +0100, Gerd Hoffmann wrote:
> >> > commit e144bb7af49ca8756b7222a75811f3b85b0bc1f5
> >> > Author: Gerd Hoffmann <kraxel@xxxxxxxxxx>
> >> > Date:   Mon Jun 3 16:30:18 2013 +0200
> >> > 
> >> >     usb: add xhci support
> >> >    
> >> >     $subject says all.  Support for usb3 streams is not implemented yet,
> >> >     otherwise it is fully functional.  Tested all usb devices supported
> >> >     by qemu (keyboard, storage, usb hubs), except for usb attached scsi
> >> >     in usb3 mode (which needs streams).
> >> >    
> >> >     Tested on qemu only, tagged with QEMU_HARDWARE because of that.
> >> >     Testing with physical hardware to be done.
> >> 
> >> That commit made seabios size (default qemu config, gcc 4.7+) jump from
> >> 128k to 256k in size because the code didn't fit into 128k any more.
> >> 
> >> Most likely the failure isn't related to xhci at all, but to the size
> >> change.
> >> 
> >> You can try to turn off some features (hardware support) you don't need
> >> to make the bios image smaller.  1.7.4 also has a config option to
> >> explicitly set the image size you want.
> >> 
> >> IIRC xen combines seabios and hvmloader into a single 256k image
> >> somehow, so it might make sense to set the seabios image size to
> >> something between 128k and 256k.  But better ask the xen people for
> >> details here.
> 
> A patch allowing the size to be other than a power of 2 was rejected.
> And I vaguely seem to recall that you actually participated in that?
> 
> > I think this was fixed in Xen with
> > http://xenbits.xen.org/gitweb/?p=xen.git;a=commit;h=5f2875739beef3a75c7a7e85
> >  
> > 79b6cbcb464e61b3
> > 
> > I suppose this should be backported to the 4.3.x stable branch.
> 
> It was backported already, and is part of 4.3.1.

Oops, gitweb didn't find it.

Debian only has 4.3.0 so that makes sense...

Ian.


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