Re: [Xen-devel] passing smbios table from qemu

[Ross Philipson <ross.philipson@xxxxxxxxxx>]

On 01/09/2014 05:06 AM, Ian Campbell wrote:
> On Wed, 2014-01-08 at 18:29 +0000, Ross Philipson wrote:
> > > -----Original Message-----
> > > From: xen-devel-bounces@xxxxxxxxxxxxx [mailto:xen-devel-
> > > bounces@xxxxxxxxxxxxx] On Behalf Of Ian Campbell
> > > Sent: Tuesday, January 07, 2014 8:56 AM
> > > To: Zhang, Eniac
> > > Cc: xen-devel@xxxxxxxxxxxxx
> > > Subject: Re: [Xen-devel] passing smbios table from qemu
> > >
> > > On Mon, 2014-01-06 at 21:01 +0000, Zhang, Eniac wrote:
> > >
> > > > Question, am I missing anything, or this feature (passing smbios) is
> > > > still work in progress?
> > > Under Xen smbios tables are supplied via hvmloader, not via qemu.
> > >
> > > What tables and or values do you want to override/supply?
> > >
> > > I believe that libxc supports passing in extra smbios tables when
> > > building the guest (via struct xc_hvm_build_args.smbios_module) but
> > > nothing has been plumbed in to make use of this.
> > >
> > > I'm not aware of any on going work to plumb that stuff further up, e.g.
> > > to libxl and xl or other toolstacks. (I think the libxc functionality is
> > > only consumed by the XenClient toolstack).
> > Just FYI, I did go back and add the support (and docs) for it in
> > libxl. I did this after the first set of patches went in per someone's
> > request (can't recall who it was at the moment).
> Ah yes, here it is:
>         smbios_firmware="STRING"
>             Specify a path to a file that contains extra SMBIOS firmware
>             structures to pass in to a guest. The file can contain a set DMTF
>             predefined structures which will override the internal defaults.
>             Not all predefined structures can be overridden, only the
>             following types: 0, 1, 2, 3, 11, 22, 39. The file can also contain
>             any number of vendor defined SMBIOS structures (type 128 - 255).
>             Since SMBIOS structures do not present their overall size, each
>             entry in the file must be preceded by a 32b integer indicating the
>             size of the next structure.
>
> Did you not have a tool/library for helping to create such blobs
> somewhere? Or is my memory playing tricks?
Your memory is intact; I did provide a helper library. I posted it as a 
tarball since I could not figure out where such a thing might live in 
the xen tree. I posted it twice - the second time with some fixes:
http://lists.xen.org/archives/html/xen-devel/2013-03/msg01850.html


> Ian.
>
>
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