From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756871Ab1KWPnR (ORCPT ); Wed, 23 Nov 2011 10:43:17 -0500 Received: from casper.infradead.org ([85.118.1.10]:55895 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756697Ab1KWPnN (ORCPT ); Wed, 23 Nov 2011 10:43:13 -0500 Message-ID: <1322062985.15493.176.camel@shinybook.infradead.org> Subject: Re: [PATCH] drm/i915: By default, enable RC6 on IVB and SNB when reasonable From: David Woodhouse To: Daniel Vetter Cc: rajesh.sankaran@intel.com, Keith Packard , Matthew Garrett , intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org Date: Wed, 23 Nov 2011 15:43:05 +0000 In-Reply-To: <20111123154128.GG3864@phenom.ffwll.local> References: <1321684889-18691-1-git-send-email-keithp@keithp.com> <20111122201531.GD5547@srcf.ucam.org> <861uszfrah.fsf@sumi.keithp.com> <20111123102643.GB3864@phenom.ffwll.local> <1322056914.15493.158.camel@shinybook.infradead.org> <20111123143931.GE3864@phenom.ffwll.local> <1322060623.15493.168.camel@shinybook.infradead.org> <20111123154128.GG3864@phenom.ffwll.local> Content-Type: multipart/signed; micalg="sha1"; protocol="application/x-pkcs7-signature"; boundary="=-82xBJspvF2y3FgneP2ka" X-Mailer: Evolution 3.2.1 (3.2.1-2.fc16) Mime-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --=-82xBJspvF2y3FgneP2ka Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable 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 onl= y > instantiates a identity mapping and leaves the dmar unit on. Is that > wrong?=20 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(). --=20 dwmw2 --=-82xBJspvF2y3FgneP2ka Content-Type: application/x-pkcs7-signature; name="smime.p7s" Content-Disposition: attachment; filename="smime.p7s" Content-Transfer-Encoding: base64 MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIITvzCCBi0w ggQVoAMCAQICAwCtOTANBgkqhkiG9w0BAQUFADBUMRQwEgYDVQQKEwtDQWNlcnQgSW5jLjEeMBwG A1UECxMVaHR0cDovL3d3dy5DQWNlcnQub3JnMRwwGgYDVQQDExNDQWNlcnQgQ2xhc3MgMyBSb290 MB4XDTEwMDYxMjEwMDMwMFoXDTEyMDYxMTEwMDMwMFowgegxGDAWBgNVBAMTD0RhdmlkIFdvb2Ro b3VzZTEiMCAGCSqGSIb3DQEJARYTZHdtdzJAaW5mcmFkZWFkLm9yZzEfMB0GCSqGSIb3DQEJARYQ ZGF2aWRAd29vZGhvdS5zZTEoMCYGCSqGSIb3DQEJARYZZGF2aWQud29vZGhvdXNlQGludGVsLmNv bTEkMCIGCSqGSIb3DQEJARYVZHdtdzJAbGludXguaW50ZWwuY29tMTcwNQYJKoZIhvcNAQkBFigx MDg3MmEwN2Y2ZDdlMWUwN2Y1NWZmMTcyYTAzYjMwMGVlYWFkMjAzMIIBIjANBgkqhkiG9w0BAQEF AAOCAQ8AMIIBCgKCAQEA29OPhNvMxBMW83psWdVhZDtmJvgN+tBEp1r6MZamONsR0k81a6fDFwJz 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