linux-kernel - Re: [PATCH 2/2] x86, microcode: Make reload interface per system

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Message-ID: <561ca4ba-6e2d-4b58-9dba-4ca51afad204@email.android.com>
Date:	Fri, 22 Jun 2012 19:26:52 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Henrique de Moraes Holschuh <hmh@....eng.br>
CC:	Borislav Petkov <bp@...64.org>,
	Peter Zijlstra <peterz@...radead.org>,
	"Yu, Fenghua" <fenghua.yu@...el.com>, X86-ML <x86@...nel.org>,
	Ingo Molnar <mingo@...nel.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	LKML <linux-kernel@...r.kernel.org>,
	Andreas Herrmann <andreas.herrmann3@....com>
Subject: Re: [PATCH 2/2] x86, microcode: Make reload interface per system

Not quite.

Henrique de Moraes Holschuh <hmh@....eng.br> wrote:

>On Fri, 22 Jun 2012, H. Peter Anvin wrote:
>> On 06/20/2012 04:09 AM, Borislav Petkov wrote:
>> > Yeah, both should be workable. Let's see what Intel wants to do:
>hpa,
>> > Fenghua?
>> 
>> What we want to do is to have a unified binary blob (which would be
>> about half that size) but the format may be affected by Fenghua's
>> ongoing work so we're not quite ready to rev the format now just to
>do
>> it again.
>
>Any reason why you can't just take a single file with one binary
>microcode
>appended back-to-back after the other (i.e. exactly what
>/dev/cpu/microcode
>accepts)?
>
>You'd only be able to release that memory after all cores were brought
>online [and any microcode that did get used to update a core was copied
>somewhere else for future use], but that's hardly a big problem.
>
>-- 
>  "One disk to rule them all, One disk to find them. One disk to bring
>  them all and in the darkness grind them. In the Land of Redmond
>  where the shadows lie." -- The Silicon Valley Tarot
>  Henrique Holschuh

-- 
Sent from my mobile phone. Please excuse brevity and lack of formatting.
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