linux-kernel - Re: [PATCH v2 2/3] driver: provide sysfs interfaces to access TXT config space

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Date:	Thu, 16 May 2013 18:03:12 +0200
From:	Pavel Machek <pavel@....cz>
To:	Qiaowei Ren <qiaowei.ren@...el.com>
Cc:	Matthew Garrett <matthew.garrett@...ula.com>,
	linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org,
	Xiaoyan Zhang <xiaoyan.zhang@...el.com>,
	Gang Wei <gang.wei@...el.com>, Greg KH <greg@...ah.com>
Subject: Re: [PATCH v2 2/3] driver: provide sysfs interfaces to access TXT
 config space

On Tue 2013-05-14 01:24:43, Qiaowei Ren wrote:
> These interfaces are located in /sys/devices/platform/intel_txt/config,
> and including totally 37 files, providing access to Intel TXT
> configuration registers.

This looks like very wrong interface... equivalent of /dev/mem.

> +What:		/sys/devices/platform/intel_txt/config/STS_raw
> +Date:		May 2013
> +KernelVersion:	3.9
> +Contact:	"Qiaowei Ren" <qiaowei.ren@...el.com>
> +Description:	TXT.STS is the general status register. This read-only register
> +		is used by AC modules and the MLE to get the status of various
> +		Intel TXT features.

This is not enough to allow people to understand what this does/should
do, nor does it allow (for example) ARM people to implement something
compatible.

Is there specific reason why "better" interface is impossible?
									Pavel
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