linux-kernel - Re: [PATCH] drm/i915: By default, enable RC6 on IVB and SNB when reasonable

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: <1322062985.15493.176.camel@shinybook.infradead.org>
Date:	Wed, 23 Nov 2011 15:43:05 +0000
From:	David Woodhouse <dwmw2@...radead.org>
To:	Daniel Vetter <daniel@...ll.ch>
Cc:	rajesh.sankaran@...el.com, Keith Packard <keithp@...thp.com>,
	Matthew Garrett <mjg@...hat.com>,
	intel-gfx@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
	dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH] drm/i915: By default, enable RC6 on IVB and SNB when
 reasonable

On Wed, 2011-11-23 at 16:41 +0100, Daniel Vetter wrote:
> Hm, that comment confuses me a bit. I've always thought that igfx_off only
> instantiates a identity mapping and leaves the dmar unit on. Is that
> wrong? 

It's completely off. If a DMAR unit has *only* graphics devices behind
it (as the one for the built-in graphics does, because it's a whole
boatload of speshul case for integration with the GTT), we just don't
enable it at all. See the second for_each_drhd_unit() loop in
init_no_remapping_devices().

-- 
dwmw2

Download attachment "smime.p7s" of type "application/x-pkcs7-signature" (5818 bytes)