Re: [Xen-devel] Update Seabios on xen-unstable

[Ross Philipson <Ross.Philipson@xxxxxxxxxx>]

> -----Original Message-----
> From: xen-devel-bounces@xxxxxxxxxxxxx [mailto:xen-devel-
> bounces@xxxxxxxxxxxxx] On Behalf Of Ian Campbell
> Sent: Friday, January 11, 2013 4:54 AM
> To: fantonifabio@xxxxxxxxxx
> Cc: Anthony Perard; xen-devel; Stefano Stabellini
> Subject: Re: [Xen-devel] Update Seabios on xen-unstable
> 
> On Fri, 2013-01-11 at 09:29 +0000, Fabio Fantoni wrote:
> 
> > I see the "HVM firmware passthrough" patch, but I not found
> > documentation about it.
> 
> Check the list for posts from Ross.

I am working on support in xl to introduce params for specifying
the firmware files to pass in. I will document what they are in
the xl.cfg docs. Also, the header file xen/public/hvm/hvm_xs_string.h
indicates what the input blobs should look like.

> 
> > Can I use it to do a rapid test adding qxl vgabios?
> 
> I don't think so, AFAIK, it is for passing through ACPI and SMBIOS
> tables, not BIOSes them selves

Yes it is for SMBIOS and ACPI right now. I could enhance it to
load other things but as noted below, I though SeaBIOS could
load OROMs specified by the devices.

> 
> > With xen seabios is built-in into hvmloader (instead of kvm and qemu).
> > I didn't see any fixed paths to link vgabioses so I think that seabios
> > can't autoload it in xen now.
> 
> SeaBIOS on Xen loads the BIOS from the device's ROM BAR. IOW it is
> supplied by qemu.
> 
> Ian.
> 
> 
> 
> 
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