From: Joerg Roedel <joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org> To: Will Deacon <will.deacon-5wv7dgnIgG8@public.gmane.org> Cc: Andreas Herrmann <andreas.herrmann-bsGFqQB8/DxBDgjK7y7TUQ@public.gmane.org>, "iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org" <iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org>, "devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org" <devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org>, "linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org" <linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org> Subject: Re: [PATCH 7/9] documentation: iommu: add description of ARM System MMU binding Date: Fri, 21 Jun 2013 15:55:08 +0200 [thread overview] Message-ID: <20130621135507.GI11309@8bytes.org> (raw) In-Reply-To: <20130621095729.GA7766-MRww78TxoiP5vMa5CHWGZ34zcgK1vI+I0E9HWUfgJXw@public.gmane.org> Hi Will, On Fri, Jun 21, 2013 at 10:57:29AM +0100, Will Deacon wrote: > This is a common driver that will support any IOMMUs compatible with v1 or > v2 of the ARM SMMU architecture. Currently, that includes SMMUs known > informatively as MMU-400, MMU-401 and MMU-500. I had a look at the other > IOMMU drivers in the kernel and they seem to be driving incompatible IOMMUs, > so I don't see how this driver can replace those. > > However, we'll hopefully see ARM SMMU-compatible devices turning up soon (I > know of many SoCs in development that are looking at them). That sounds great. So in the future there will be a single driver for most future SOCs. This is a real improvement over the current situation. >From NVidia is another driver with 'smmu' in its name, is that one also incompatible? > Chaining is really horrible and exists as a hack to support virtualisation > using two separate SMMUs, where neither of them can support nested > translation. I see, thanks for the explanation. Joerg
WARNING: multiple messages have this Message-ID (diff)
From: joro@8bytes.org (Joerg Roedel) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH 7/9] documentation: iommu: add description of ARM System MMU binding Date: Fri, 21 Jun 2013 15:55:08 +0200 [thread overview] Message-ID: <20130621135507.GI11309@8bytes.org> (raw) In-Reply-To: <20130621095729.GA7766@mudshark.cambridge.arm.com> Hi Will, On Fri, Jun 21, 2013 at 10:57:29AM +0100, Will Deacon wrote: > This is a common driver that will support any IOMMUs compatible with v1 or > v2 of the ARM SMMU architecture. Currently, that includes SMMUs known > informatively as MMU-400, MMU-401 and MMU-500. I had a look at the other > IOMMU drivers in the kernel and they seem to be driving incompatible IOMMUs, > so I don't see how this driver can replace those. > > However, we'll hopefully see ARM SMMU-compatible devices turning up soon (I > know of many SoCs in development that are looking at them). That sounds great. So in the future there will be a single driver for most future SOCs. This is a real improvement over the current situation. >From NVidia is another driver with 'smmu' in its name, is that one also incompatible? > Chaining is really horrible and exists as a hack to support virtualisation > using two separate SMMUs, where neither of them can support nested > translation. I see, thanks for the explanation. Joerg
next prev parent reply other threads:[~2013-06-21 13:55 UTC|newest] Thread overview: 97+ messages / expand[flat|nested] mbox.gz Atom feed top 2013-06-10 18:34 [PATCH 0/9] Add support for ARM SMMU architectures 1 and 2 Will Deacon 2013-06-10 18:34 ` Will Deacon [not found] ` <1370889285-22799-1-git-send-email-will.deacon-5wv7dgnIgG8@public.gmane.org> 2013-06-10 18:34 ` [PATCH 1/9] dma: pl330: rip out broken, redundant ID probing Will Deacon 2013-06-10 18:34 ` Will Deacon [not found] ` <1370889285-22799-2-git-send-email-will.deacon-5wv7dgnIgG8@public.gmane.org> 2013-06-11 4:37 ` Jassi Brar 2013-06-11 22:31 ` Grant Likely 2013-06-11 22:31 ` Grant Likely 2013-06-12 5:31 ` Vinod Koul 2013-06-12 5:31 ` Vinod Koul 2013-06-11 4:40 ` Jassi Brar 2013-06-11 4:40 ` Jassi Brar [not found] ` <CAJe_Zhc1UoTC4q4oaW=dzyi_10Q7EoezoT=G8_v+yCmBxV75+A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2013-06-11 8:45 ` Will Deacon 2013-06-11 8:45 ` Will Deacon 2013-06-10 18:34 ` [PATCH 2/9] dma: pl330: use dma_addr_t for describing bus addresses Will Deacon 2013-06-10 18:34 ` Will Deacon [not found] ` <1370889285-22799-3-git-send-email-will.deacon-5wv7dgnIgG8@public.gmane.org> 2013-06-11 4:37 ` Jassi Brar [not found] ` <CAJe_ZheKMVQgq42Vx5N1TXXdgFJ2sp50ixU30A7beXhmSVHnZQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2013-06-12 5:31 ` Vinod Koul 2013-06-12 5:31 ` Vinod Koul 2013-06-11 22:32 ` Grant Likely 2013-06-11 22:32 ` Grant Likely 2013-06-11 4:39 ` Jassi Brar 2013-06-11 4:39 ` Jassi Brar 2013-06-10 18:34 ` [PATCH 3/9] ARM: dma-mapping: convert DMA direction into IOMMU protection attributes Will Deacon 2013-06-10 18:34 ` Will Deacon 2013-06-19 8:37 ` Marek Szyprowski 2013-06-19 8:37 ` Marek Szyprowski [not found] ` <51C16DAF.1090205-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org> 2013-06-19 8:52 ` Will Deacon 2013-06-19 8:52 ` Will Deacon [not found] ` <20130619085202.GC20351-MRww78TxoiP5vMa5CHWGZ34zcgK1vI+I0E9HWUfgJXw@public.gmane.org> 2013-06-19 8:57 ` Marek Szyprowski 2013-06-19 8:57 ` Marek Szyprowski [not found] ` <1370889285-22799-4-git-send-email-will.deacon-5wv7dgnIgG8@public.gmane.org> 2013-06-25 10:12 ` Hiroshi Doyu 2013-06-25 10:12 ` Hiroshi Doyu [not found] ` <20130625131215.d3cea2a5668a3d41dbbeb064-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2013-06-25 11:37 ` Will Deacon 2013-06-25 11:37 ` Will Deacon [not found] ` <20130625113714.GF31838-MRww78TxoiP5vMa5CHWGZ34zcgK1vI+I0E9HWUfgJXw@public.gmane.org> 2013-06-25 11:52 ` Hiroshi Doyu 2013-06-25 11:52 ` Hiroshi Doyu 2013-06-25 11:52 ` Hiroshi Doyu [not found] ` <20130625.145226.1632119404634300971.hdoyu-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2013-06-25 12:34 ` Will Deacon 2013-06-25 12:34 ` Will Deacon 2013-06-10 18:34 ` [PATCH 4/9] ARM: dma-mapping: NULLify dev->archdata.mapping pointer on detach Will Deacon 2013-06-10 18:34 ` Will Deacon [not found] ` <1370889285-22799-5-git-send-email-will.deacon-5wv7dgnIgG8@public.gmane.org> 2013-06-11 5:34 ` Hiroshi Doyu 2013-06-11 5:34 ` Hiroshi Doyu [not found] ` <20130611.083455.1500863288897785600.hdoyu-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2013-06-11 8:50 ` Will Deacon 2013-06-11 8:50 ` Will Deacon [not found] ` <20130611085015.GC24729-MRww78TxoiP5vMa5CHWGZ34zcgK1vI+I0E9HWUfgJXw@public.gmane.org> 2013-06-11 9:39 ` Hiroshi Doyu 2013-06-11 9:39 ` Hiroshi Doyu [not found] ` <20130611123933.4d278ff4e056f395788ad060-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2013-06-19 8:59 ` Marek Szyprowski 2013-06-19 8:59 ` Marek Szyprowski 2013-06-10 18:34 ` [PATCH 5/9] arm64: pgtable: use pte_index instead of __pte_index Will Deacon 2013-06-10 18:34 ` Will Deacon 2013-06-10 18:34 ` [PATCH 6/9] arm64: device: add iommu pointer to device archdata Will Deacon 2013-06-10 18:34 ` Will Deacon 2013-06-10 18:34 ` [PATCH 7/9] documentation: iommu: add description of ARM System MMU binding Will Deacon 2013-06-10 18:34 ` Will Deacon [not found] ` <1370889285-22799-8-git-send-email-will.deacon-5wv7dgnIgG8@public.gmane.org> 2013-06-12 8:44 ` Grant Likely 2013-06-12 8:44 ` Grant Likely 2013-06-20 20:08 ` Joerg Roedel 2013-06-20 20:08 ` Joerg Roedel [not found] ` <20130620200845.GF11309-zLv9SwRftAIdnm+yROfE0A@public.gmane.org> 2013-06-21 9:57 ` Will Deacon 2013-06-21 9:57 ` Will Deacon [not found] ` <20130621095729.GA7766-MRww78TxoiP5vMa5CHWGZ34zcgK1vI+I0E9HWUfgJXw@public.gmane.org> 2013-06-21 13:55 ` Joerg Roedel [this message] 2013-06-21 13:55 ` Joerg Roedel [not found] ` <20130621135507.GI11309-zLv9SwRftAIdnm+yROfE0A@public.gmane.org> 2013-06-21 16:41 ` Will Deacon 2013-06-21 16:41 ` Will Deacon 2013-06-25 19:18 ` Stuart Yoder 2013-06-25 19:18 ` Stuart Yoder [not found] ` <CALRxmdBxFWoRKv+bUu8VEwNNcAJUej9jM2V8N0rrqrr_Vpe8fQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2013-06-26 13:39 ` Will Deacon 2013-06-26 13:39 ` Will Deacon [not found] ` <20130626133941.GD7417-MRww78TxoiP5vMa5CHWGZ34zcgK1vI+I0E9HWUfgJXw@public.gmane.org> 2013-06-26 16:19 ` Stuart Yoder 2013-06-26 16:19 ` Stuart Yoder [not found] ` <CALRxmdCycFK2wW=C4aU79mudSaT+2vU8nzXxepdstubg+YSdQg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2013-06-26 17:42 ` Will Deacon 2013-06-26 17:42 ` Will Deacon [not found] ` <20130626174231.GH10333-MRww78TxoiP5vMa5CHWGZ34zcgK1vI+I0E9HWUfgJXw@public.gmane.org> 2013-06-27 18:22 ` Stuart Yoder 2013-06-27 18:22 ` Stuart Yoder [not found] ` <CALRxmdD5fyp06xW+z=rWagJc_bcJmpr1H9Zbdf=xbg9cCzvVfw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2013-06-28 9:06 ` Will Deacon 2013-06-28 9:06 ` Will Deacon [not found] ` <20130628090635.GB29002-MRww78TxoiP5vMa5CHWGZ34zcgK1vI+I0E9HWUfgJXw@public.gmane.org> 2013-06-28 16:03 ` Stuart Yoder 2013-06-28 16:03 ` Stuart Yoder 2013-06-10 18:34 ` [PATCH 8/9] iommu: add support for ARM Ltd. System MMU architecture Will Deacon 2013-06-10 18:34 ` Will Deacon [not found] ` <1370889285-22799-9-git-send-email-will.deacon-5wv7dgnIgG8@public.gmane.org> 2013-06-20 21:26 ` Joerg Roedel 2013-06-20 21:26 ` Joerg Roedel [not found] ` <20130620212646.GG11309-zLv9SwRftAIdnm+yROfE0A@public.gmane.org> 2013-06-21 10:23 ` Will Deacon 2013-06-21 10:23 ` Will Deacon [not found] ` <20130621102318.GB7766-MRww78TxoiP5vMa5CHWGZ34zcgK1vI+I0E9HWUfgJXw@public.gmane.org> 2013-06-21 14:13 ` Joerg Roedel 2013-06-21 14:13 ` Joerg Roedel 2013-06-21 15:00 ` Will Deacon 2013-06-21 15:00 ` Will Deacon [not found] ` <20130621150006.GG7766-MRww78TxoiP5vMa5CHWGZ34zcgK1vI+I0E9HWUfgJXw@public.gmane.org> 2013-06-21 15:30 ` Joerg Roedel 2013-06-21 15:30 ` Joerg Roedel [not found] ` <20130621153044.GL11309-zLv9SwRftAIdnm+yROfE0A@public.gmane.org> 2013-06-21 16:40 ` Will Deacon 2013-06-21 16:40 ` Will Deacon 2013-06-10 18:34 ` [PATCH 9/9] MAINTAINERS: add entry for ARM system MMU driver Will Deacon 2013-06-10 18:34 ` Will Deacon [not found] ` <1370889285-22799-10-git-send-email-will.deacon-5wv7dgnIgG8@public.gmane.org> 2013-06-12 8:45 ` Grant Likely 2013-06-12 8:45 ` Grant Likely
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