Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751447AbbEGJIK (ORCPT ); Thu, 7 May 2015 05:08:10 -0400 Received: from mout.kundenserver.de ([212.227.17.13]:52145 "EHLO mout.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750725AbbEGJIE (ORCPT ); Thu, 7 May 2015 05:08:04 -0400 From: Arnd Bergmann To: linaro-acpi@lists.linaro.org Cc: Suravee Suthikulanit , "Rafael J. Wysocki" , herbert@gondor.apana.org.au, catalin.marinas@arm.com, will.deacon@arm.com, linux-kernel@vger.kernel.org, linux-crypto@vger.kernel.org, linux-acpi@vger.kernel.org, netdev@vger.kernel.org, Mika Westerberg , davem@davemloft.net, linux-arm-kernel@lists.infradead.org, lenb@kernel.org Subject: Re: [Linaro-acpi] [V2 PATCH 1/5] ACPI / scan: Parse _CCA and setup device coherency Date: Thu, 07 May 2015 11:07:08 +0200 Message-ID: <2842267.oTDe4myPcU@wuerfel> User-Agent: KMail/4.11.5 (Linux/3.16.0-10-generic; KDE/4.11.5; x86_64; ; ) In-Reply-To: <554A92C3.7060606@amd.com> References: <1430838729-21572-1-git-send-email-Suravee.Suthikulpanit@amd.com> <4573209.dHyztuCFMt@vostro.rjw.lan> <554A92C3.7060606@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" X-Provags-ID: V03:K0:6mGs60vTgcZ0T/enLlb9988fTqrcVZ0LAfaxgxmcPzZgy+lNTxW gDLd8N5Yu87CpEfJmDifkSeHCmHI524LqeNCxBXnlUKrO9P8YKcBcblI4CxAvQkQ+p/K+3v JAY/Clm2Pe6qLZx9mzzlg/06upusgPeO3UiGgCBYzEIkuJi5S+Z6194RxLMozG318918IXi Rm7iiCo3abL9vwSXN6yJQ== X-UI-Out-Filterresults: notjunk:1; Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 953 Lines: 27 On Wednesday 06 May 2015 17:16:35 Suravee Suthikulanit wrote: > On 5/6/2015 5:21 PM, Rafael J. Wysocki wrote: > >>>> > >>+ bool > >>>> > >>+ > >>>> > >>+config ACPI_SUPPORT_CCA_ZERO > >>> > > > >>> > >I guess this means "we support devices that can DMA, but are not coherent". > >>> > >right? > >> > > >> >Yes, basically when _CCA=0. > > So what about > > > > ARCH_SUPPORT_CACHE_INCOHERENT_DMA > > Since this is specific to ACPI _CCA, I just want to be clear with the > naming. How about directly using the architecture names here, this is inherently architecture specific, and it's more likely that if another architecture gets added in the future that it will have other requirements. Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/