From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from tx2ehsobe004.messaging.microsoft.com ([65.55.88.14]:20181 "EHLO TX2EHSOBE007.bigfish.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754638Ab0G2JGl (ORCPT ); Thu, 29 Jul 2010 05:06:41 -0400 Date: Thu, 29 Jul 2010 11:06:08 +0200 From: "Roedel, Joerg" Subject: Re: [PATCH 1/2] arm: msm: Add System MMU support. Message-ID: <20100729090607.GN26098@amd.com> References: <20100729123512Y.fujita.tomonori@lab.ntt.co.jp> <201007291026.55928.arnd@arndb.de> <20100729084018.GM26098@amd.com> <20100729174621W.fujita.tomonori@lab.ntt.co.jp> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Disposition: inline In-Reply-To: <20100729174621W.fujita.tomonori@lab.ntt.co.jp> Sender: linux-arm-msm-owner@vger.kernel.org List-ID: To: FUJITA Tomonori Cc: "arnd@arndb.de" , "stepanm@codeaurora.org" , "linux-arm-kernel@lists.infradead.org" , "linux-arm-msm@vger.kernel.org" , "dwalker@codeaurora.org" , "linux-kernel@vger.kernel.org" On Thu, Jul 29, 2010 at 04:46:59AM -0400, FUJITA Tomonori wrote: > On Thu, 29 Jul 2010 10:40:19 +0200 > "Roedel, Joerg" wrote: > > > The IOMMU-API is not about SR-IOV. > > That's true. However, the point is that include/iommu.h is far from > the IOMMU-API. > > You could still insist that include/iommu.h is designed for the > generic IOMMU-API. But the fact is that it's designed for very > specific purposes. No intention to make it for generic purposes. I have no clue about the ARM iommus on the omap-platform. From a quick look into the header file I see some similarities to the IOMMU-API. I am also very open for discussions about how the IOMMU-API could be extended to fit the needs of other platforms. Only because nobody has tried to discuss about such an effort is no reason to push the IOMMU-API back. > > Since you added it two years ago, nobody has tried to extend > it. Instead, we have something like > arch/arm/plat-omap/include/plat/iommu.h. And I think we should try to merge this platform-specific functionality into the IOMMU-API. Joerg -- Joerg Roedel - AMD Operating System Research Center Advanced Micro Devices GmbH Einsteinring 24 85609 Dornach General Managers: Alberto Bozzo, Andrew Bowd Registration: Dornach, Landkr. Muenchen; Registerger. Muenchen, HRB Nr. 43632 From mboxrd@z Thu Jan 1 00:00:00 1970 From: Joerg.Roedel@amd.com (Roedel, Joerg) Date: Thu, 29 Jul 2010 11:06:08 +0200 Subject: [PATCH 1/2] arm: msm: Add System MMU support. In-Reply-To: <20100729174621W.fujita.tomonori@lab.ntt.co.jp> References: <20100729123512Y.fujita.tomonori@lab.ntt.co.jp> <201007291026.55928.arnd@arndb.de> <20100729084018.GM26098@amd.com> <20100729174621W.fujita.tomonori@lab.ntt.co.jp> Message-ID: <20100729090607.GN26098@amd.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Thu, Jul 29, 2010 at 04:46:59AM -0400, FUJITA Tomonori wrote: > On Thu, 29 Jul 2010 10:40:19 +0200 > "Roedel, Joerg" wrote: > > > The IOMMU-API is not about SR-IOV. > > That's true. However, the point is that include/iommu.h is far from > the IOMMU-API. > > You could still insist that include/iommu.h is designed for the > generic IOMMU-API. But the fact is that it's designed for very > specific purposes. No intention to make it for generic purposes. I have no clue about the ARM iommus on the omap-platform. From a quick look into the header file I see some similarities to the IOMMU-API. I am also very open for discussions about how the IOMMU-API could be extended to fit the needs of other platforms. Only because nobody has tried to discuss about such an effort is no reason to push the IOMMU-API back. > > Since you added it two years ago, nobody has tried to extend > it. Instead, we have something like > arch/arm/plat-omap/include/plat/iommu.h. And I think we should try to merge this platform-specific functionality into the IOMMU-API. Joerg -- Joerg Roedel - AMD Operating System Research Center Advanced Micro Devices GmbH Einsteinring 24 85609 Dornach General Managers: Alberto Bozzo, Andrew Bowd Registration: Dornach, Landkr. Muenchen; Registerger. Muenchen, HRB Nr. 43632