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

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20130516160311.GA12299@amd.pavel.ucw.cz>
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
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/