linux-kernel - Re: [tip:x86/microcode] x86/microcode_intel_early.c: Early update ucode on Intel's CPU

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Message-ID: <CAE9FiQXGZYZiH3eUup2UXGWkeqKjsiHk7aMTFJO7xxFkqTpBZA@mail.gmail.com>
Date:	Mon, 10 Dec 2012 18:39:39 -0800
From:	Yinghai Lu <yinghai@...nel.org>
To:	"Yu, Fenghua" <fenghua.yu@...el.com>
Cc:	"mingo@...nel.org" <mingo@...nel.org>,
	"hpa@...or.com" <hpa@...or.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"hpa@...ux.intel.com" <hpa@...ux.intel.com>,
	"linux-tip-commits@...r.kernel.org" 
	<linux-tip-commits@...r.kernel.org>
Subject: Re: [tip:x86/microcode] x86/microcode_intel_early.c: Early update
 ucode on Intel's CPU

On Mon, Dec 3, 2012 at 4:18 PM, Yu, Fenghua <fenghua.yu@...el.com> wrote:
>> From: yhlu.kernel@...il.com [mailto:yhlu.kernel@...il.com] On Behalf Of
>> Yinghai Lu
>>
>> may need to copy the ucode.bin to BRK at first. that will make code
>> much simple, and later does not need to
>> copy them back in free_bootmem_initrd.
>>
>> aka, this patchset is not ready for 3.8 even.
>>
>
> I will relocate saved microcode blob (mc_saved_in_initrd) after initrd is
> relocated in updated patches. Thus, mc_saved_in_initrd always point to
> right initrd during boot time.

No, you should not copy that several times.

just pre-allocate some kbytes in BRK, and copy to there one time.

Yinghai
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