Re: [Xen-devel] [PATCH V3] x86, amd_ucode: Support multiple container files appended together

[Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>]

On 06/27/2014 04:15 AM, Jan Beulich wrote:
> > > > On 26.06.14 at 22:00, <boris.ostrovsky@xxxxxxxxxx> wrote:
> > The trouble is that if I have two files in my hands, both called
> > microcode_amd_fam15h.bin, I don't know which one is the more up-to-date
> > (would be nice to have a tool to print file info).
> >
> > Of course, one can argue that in that case I shouldn't be using neither
> > but HW makes its own verification of patches so in principle trying both
> > should be safe (provided that SW tries not to load older revision).
> I think we should focus on getting things to work with realistic
> blobs, i.e. such that distros and their tools would generate. If you
> update a respective package, it'll be clear which blob is the latest,
> and there's generally not going to be two blobs for the same family
> put on a single system. People obtaining ucode blobs manually from
> elsewhere should know what they're doing and not try to paste
> together two of them targeting the same family.
Ok.

I only mention this scenario because I myself needed to deal with this 
(on more than one occasion, in fact) when I had two containers and 
didn't know which one is which.
-boris

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