Re: passing smbios table from qemu

[Ross Philipson <ross.philipson@citrix.com>]

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@lists.xen.org [mailto:xen-devel-
>>> bounces@lists.xen.org] On Behalf Of Ian Campbell
>>> Sent: Tuesday, January 07, 2014 8:56 AM
>>> To: Zhang, Eniac
>>> Cc: xen-devel@lists.xen.org
>>> 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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