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

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Message-ID: <4FE0A160.9080103@zytor.com>
Date:	Tue, 19 Jun 2012 08:57:20 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Borislav Petkov <bp@...64.org>
CC:	Peter Zijlstra <peterz@...radead.org>,
	Henrique de Moraes Holschuh <hmh@....eng.br>,
	LKML <linux-kernel@...r.kernel.org>, x86 <x86@...nel.org>,
	Ingo Molnar <mingo@...nel.org>,
	Andreas Herrmann <andreas.herrmann3@....com>,
	Dimitri Sivanich <sivanich@....com>,
	Dmitry Adamushko <dmitry.adamushko@...il.com>,
	Greg Kroah-Hartman <greg@...ah.com>
Subject: Re: [PATCH] x86, microcode: Make reload interface per system

On 06/19/2012 08:06 AM, Borislav Petkov wrote:
> 
> Now we load the ucode driver very early if it is built-in (look at
> printk timestamps):
> 
> [    3.651275] microcode: CPU0: patch_level=0x010000c4
> [    3.664943] microcode: CPU1: patch_level=0x010000c4
> [    3.670177] microcode: CPU2: patch_level=0x010000c4
> [    3.675407] microcode: CPU3: patch_level=0x010000c4
> ...
> 
> and then later, when we have userspace, we can use the reload thing to
> re-request microcode. Which is also fine, I guess.
> 

Right, although we can push it much, much earlier than that.

	-hpa
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