Re: [tip:x86/microcode] x86/microcode_intel_early.c: Early updateucode on Intel's CPU

[H. Peter Anvin]

On 12/19/2012 03:40 PM, Borislav Petkov wrote:
> This is done on the BSP, right? So we can measure it how long it takes
> by taking TSC values of start and end.

Yes, and we can count the number of #PF traps cheaply enough.  It would 
be interesting to put a counter on the number of #PFs and the number of 
resets and read them out on a large-system boot.

> Sounds doable but we should take a hard look at the patches so that we
> don't miss anything.
>
> Also, I don't know how stuff like that would be approached for a wider
> testing - I mean, it is a serious change in x86 boot code and there will
> be issues.

The goal should be to have this into -tip and -next by the middle of 
January in order to make the 3.9 merge window, I think.

	-hpa

--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.

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