Messages in this thread | | | Date | Wed, 26 Nov 2014 07:39:26 -0500 | From | boris ostrovsky <> | Subject | Re: [PATCH 3.17 100/141] x86, microcode: Fix accessing dis_ucode_ldr on 32-bit |
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On 11/26/2014 5:55 AM, Borislav Petkov wrote: > On Wed, Nov 26, 2014 at 12:00:45AM -0500, Boris Ostrovsky wrote: >> Sigh... I take this back. It breaks 32-bit baremetal. I haven't looked any >> further but it seems to be dying very early. I suspect cpuid pv_op is not >> set up yet. If that's true, perhaps you could check whether it is valid in >> x86_guest()? > Right, this is why we're using the native variants in the early loader. > So we need a different method for detecting very early whether we're > running as a guest. > > What I'd like more, though, is if we continue debugging the original > issue where we fail in load_ucode_intel_ap(). Does it happen on this line: > > initrd_start_addr = (unsigned long)__pa_nodebug(*initrd_start_p);
I don't have access to my test setup right now (and won't be until late today at best) but I am pretty sure this was the line when I was looking at this yesterday.
> > where we deref the initrd_start_p? Do you have a full splat with a Code: > section?
https://lkml.org/lkml/2014/11/25/973 is all I have right now.
-boris
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