linux-kernel - Re: [RFC v6][PATCH 0b/4] intel_txt: Intel(R) Trusted Execution Technology support for Linux

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Message-ID: <4A83011A.2090808@zytor.com>
Date:	Wed, 12 Aug 2009 10:51:22 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Arjan van de Ven <arjan@...ux.intel.com>
CC:	"Wang, Shane" <shane.wang@...el.com>, Ingo Molnar <mingo@...e.hu>,
	"Cihula, Joseph" <joseph.cihula@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"andi@...stfloor.org" <andi@...stfloor.org>,
	"chrisw@...s-sol.org" <chrisw@...s-sol.org>,
	"jmorris@...ei.org" <jmorris@...ei.org>,
	"jbeulich@...ell.com" <jbeulich@...ell.com>,
	"peterm@...hat.com" <peterm@...hat.com>,
	"Wei, Gang" <gang.wei@...el.com>
Subject: Re: [RFC v6][PATCH 0b/4] intel_txt: Intel(R) Trusted Execution	Technology
 support for Linux - Details

On 08/12/2009 09:30 AM, Arjan van de Ven wrote:
> H. Peter Anvin wrote:
>> On 08/12/2009 08:42 AM, Wang, Shane wrote:
>>> oh, S3 support by TXT is one of TXT support. We have code to secure
>>> S3 sleep and resume.
>>> Without S3 support, TXT code is incomplete.
>>>
>>
>> That doesn't make any sense.
>>
>> The question is: if the user doesn't want S3, do they still need to
>> enable S3 in order to be able to use TXT?  Otherwise, this code needs to
>> be properly conditionalized.
>>
> 
> it's the other way around
> if you have S3 support, you also need the TXT S3 piece.
> the S3 piece of TXT is irrelevant if you cannot do S3.

Right.  Which means the S3 TXT part should be conditionalized on
CONFIG_ACPI_SLEEP.

	-hpa

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

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