Re: [Xen-devel] [PATCH 2/2] x86/microcode: enable boot time (pre-Dom0) loading

[Borislav Petkov <bp@xxxxxxxxx>]

On Thu, Dec 01, 2011 at 10:02:10AM +0000, Jan Beulich wrote:
> >>> On 01.12.11 at 10:55, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:
> > On Thu, 2011-12-01 at 08:04 +0000, Jan Beulich wrote:
> >> 
> >> > I got the impression they wanted some new .pack format or so?
> >> > Or is the format that they were talking about exactly what you
> >> picked?
> >> 
> >> I merely picked the binary formats that are already in use; I see no
> >> reason to invent another one. 
> > 
> > Adding a header/magic number so you can detect which of the blobs is
> > microcode?
> 
> This is precisely what I did *not* want to do.

Well, AFAICR, we talked about using the setup_data linked list in
the user-mode kernel header and since parse_setup_data() looks at
data->type, then probably something should state the type of the ucode
image, but I'm not sure on the details.

FWIW, hpa mentioned at KS he already has some code doing early ucode
loading so I'll let him chime in here. He's away this week though so it
could take a while.

-- 
Regards/Gruss,
Boris.

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