From: Will Deacon <will.deacon-5wv7dgnIgG8@public.gmane.org>
To: Auger Eric <eric.auger-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Cc: Robin Murphy <robin.murphy-5wv7dgnIgG8@public.gmane.org>,
joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org,
iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
punit.agrawal-5wv7dgnIgG8@public.gmane.org,
thunder.leizhen-hv44wF8Li93QT0dZR+AlfA@public.gmane.org
Subject: Re: [PATCH v7 00/22] Generic DT bindings for PCI IOMMUs and ARM SMMU
Date: Mon, 19 Sep 2016 13:24:36 +0100 [thread overview]
Message-ID: <20160919122435.GD9005@arm.com> (raw)
In-Reply-To: <48f3bc10-3966-7d50-d070-7ec7f0946c92-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
On Mon, Sep 19, 2016 at 02:13:45PM +0200, Auger Eric wrote:
> On 16/09/2016 18:18, Robin Murphy wrote:
> > What I probably will do, though, since we have the functionality in
> > place for the sake of the old binding, and I think there are other folks
> > who want PCI iommu-map support but would prefer not to bother with DMA
> > ops on the host, is add a command-line option to disable DMA domains
> > even for the generic bindings.
>
> Yes this would be a good thing I think. This series has an important
> impact on platforms which do not have smmu v3, where contexts are scarce
> HW resources.
Rather than disabling DMA domains entirely, we could specify a number
of contexts to reserve for other use (e.g. VFIO). It's a pity that these
options are global for the system, as opposed to per SMMU instance,
but I can't see a good way around that.
Will
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WARNING: multiple messages have this Message-ID (diff)
From: will.deacon@arm.com (Will Deacon)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v7 00/22] Generic DT bindings for PCI IOMMUs and ARM SMMU
Date: Mon, 19 Sep 2016 13:24:36 +0100 [thread overview]
Message-ID: <20160919122435.GD9005@arm.com> (raw)
In-Reply-To: <48f3bc10-3966-7d50-d070-7ec7f0946c92@redhat.com>
On Mon, Sep 19, 2016 at 02:13:45PM +0200, Auger Eric wrote:
> On 16/09/2016 18:18, Robin Murphy wrote:
> > What I probably will do, though, since we have the functionality in
> > place for the sake of the old binding, and I think there are other folks
> > who want PCI iommu-map support but would prefer not to bother with DMA
> > ops on the host, is add a command-line option to disable DMA domains
> > even for the generic bindings.
>
> Yes this would be a good thing I think. This series has an important
> impact on platforms which do not have smmu v3, where contexts are scarce
> HW resources.
Rather than disabling DMA domains entirely, we could specify a number
of contexts to reserve for other use (e.g. VFIO). It's a pity that these
options are global for the system, as opposed to per SMMU instance,
but I can't see a good way around that.
Will
next prev parent reply other threads:[~2016-09-19 12:24 UTC|newest]
Thread overview: 104+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-12 16:13 [PATCH v7 00/22] Generic DT bindings for PCI IOMMUs and ARM SMMU Robin Murphy
2016-09-12 16:13 ` Robin Murphy
[not found] ` <cover.1473695704.git.robin.murphy-5wv7dgnIgG8@public.gmane.org>
2016-09-12 16:13 ` [PATCH v7 01/22] Docs: dt: add PCI IOMMU map bindings Robin Murphy
2016-09-12 16:13 ` Robin Murphy
2016-09-12 16:13 ` [PATCH v7 02/22] of/irq: Break out msi-map lookup (again) Robin Murphy
2016-09-12 16:13 ` Robin Murphy
2016-09-12 16:13 ` [PATCH v7 03/22] iommu/of: Handle iommu-map property for PCI Robin Murphy
2016-09-12 16:13 ` Robin Murphy
2016-09-12 16:13 ` [PATCH v7 04/22] iommu: Introduce iommu_fwspec Robin Murphy
2016-09-12 16:13 ` Robin Murphy
[not found] ` <742a71630de502ac5a7a8641c6ed368d8409324d.1473695704.git.robin.murphy-5wv7dgnIgG8@public.gmane.org>
2016-09-13 9:54 ` [PATCH v7.1 " Robin Murphy
2016-09-13 9:54 ` Robin Murphy
2016-09-12 16:13 ` [PATCH v7 05/22] Docs: dt: document ARM SMMUv3 generic binding usage Robin Murphy
2016-09-12 16:13 ` Robin Murphy
[not found] ` <2273645f1fa5c76b6b98b5fd03804ab8b55a7691.1473695704.git.robin.murphy-5wv7dgnIgG8@public.gmane.org>
2016-09-20 14:46 ` Rob Herring
2016-09-20 14:46 ` Rob Herring
2016-09-12 16:13 ` [PATCH v7 06/22] iommu/arm-smmu: Fall back to global bypass Robin Murphy
2016-09-12 16:13 ` Robin Murphy
2016-09-12 16:13 ` [PATCH v7 07/22] iommu/arm-smmu: Implement of_xlate() for SMMUv3 Robin Murphy
2016-09-12 16:13 ` Robin Murphy
2016-09-12 16:13 ` [PATCH v7 08/22] iommu/arm-smmu: Support non-PCI devices with SMMUv3 Robin Murphy
2016-09-12 16:13 ` Robin Murphy
2016-09-12 16:13 ` [PATCH v7 09/22] iommu/arm-smmu: Set PRIVCFG in stage 1 STEs Robin Murphy
2016-09-12 16:13 ` Robin Murphy
2016-09-12 16:13 ` [PATCH v7 10/22] iommu/arm-smmu: Handle stream IDs more dynamically Robin Murphy
2016-09-12 16:13 ` Robin Murphy
2016-09-12 16:13 ` [PATCH v7 11/22] iommu/arm-smmu: Consolidate stream map entry state Robin Murphy
2016-09-12 16:13 ` Robin Murphy
2016-09-12 16:13 ` [PATCH v7 12/22] iommu/arm-smmu: Keep track of S2CR state Robin Murphy
2016-09-12 16:13 ` Robin Murphy
2016-09-12 16:13 ` [PATCH v7 13/22] iommu/arm-smmu: Refactor mmu-masters handling Robin Murphy
2016-09-12 16:13 ` Robin Murphy
[not found] ` <046d2d21f988d6ece916fc45b0af0804a7f200f2.1473695704.git.robin.murphy-5wv7dgnIgG8@public.gmane.org>
2016-09-14 14:21 ` [PATCH v7.1 " Robin Murphy
2016-09-14 14:21 ` Robin Murphy
2016-09-12 16:13 ` [PATCH v7 14/22] iommu/arm-smmu: Streamline SMMU data lookups Robin Murphy
2016-09-12 16:13 ` Robin Murphy
2016-09-12 16:13 ` [PATCH v7 15/22] iommu/arm-smmu: Add a stream map entry iterator Robin Murphy
2016-09-12 16:13 ` Robin Murphy
2016-09-12 16:13 ` [PATCH v7 16/22] iommu/arm-smmu: Intelligent SMR allocation Robin Murphy
2016-09-12 16:13 ` Robin Murphy
2016-09-12 16:13 ` [PATCH v7 17/22] iommu/arm-smmu: Convert to iommu_fwspec Robin Murphy
2016-09-12 16:13 ` Robin Murphy
2016-09-12 16:13 ` [PATCH v7 18/22] Docs: dt: document ARM SMMU generic binding usage Robin Murphy
2016-09-12 16:13 ` Robin Murphy
2016-09-12 16:13 ` [PATCH v7 19/22] iommu/arm-smmu: Wire up generic configuration support Robin Murphy
2016-09-12 16:13 ` Robin Murphy
[not found] ` <228dc6c675f10ae7481640d4ef2f4960c170621f.1473695704.git.robin.murphy-5wv7dgnIgG8@public.gmane.org>
2016-09-14 14:26 ` [PATCH v7.1 " Robin Murphy
2016-09-14 14:26 ` Robin Murphy
2016-09-12 16:13 ` [PATCH v7 20/22] iommu/arm-smmu: Set domain geometry Robin Murphy
2016-09-12 16:13 ` Robin Murphy
2016-09-12 16:13 ` [PATCH v7 21/22] iommu/dma: Add support for mapping MSIs Robin Murphy
2016-09-12 16:13 ` Robin Murphy
[not found] ` <2273af20d844bd618c6a90b57e639700328ebf7f.1473695704.git.robin.murphy-5wv7dgnIgG8@public.gmane.org>
2016-10-05 7:00 ` Nipun Gupta
2016-10-05 7:00 ` Nipun Gupta
[not found] ` <DB6PR0402MB2694B2E5AE266F138784D2C2E6C40-2mNvjAGDOPn2WJ5A9zev/o3W/0Ik+aLCnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org>
2016-10-05 9:55 ` Robin Murphy
2016-10-05 9:55 ` Robin Murphy
[not found] ` <6ec9519b-01df-3be8-2967-7556bd306909-5wv7dgnIgG8@public.gmane.org>
2016-10-05 11:31 ` Nipun Gupta
2016-10-05 11:31 ` Nipun Gupta
2016-09-12 16:14 ` [PATCH v7 22/22] iommu/dma: Avoid PCI host bridge windows Robin Murphy
2016-09-12 16:14 ` Robin Murphy
[not found] ` <5f7bfee298f98d29a35933d3e0252d32b83d62b8.1473695704.git.robin.murphy-5wv7dgnIgG8@public.gmane.org>
2016-09-14 10:55 ` Marek Szyprowski
2016-09-14 10:55 ` Marek Szyprowski
[not found] ` <ab8693f6-20d6-2a95-9f1f-0607e72bc012-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
2016-09-14 11:10 ` Robin Murphy
2016-09-14 11:10 ` Robin Murphy
[not found] ` <49c51c4f-cb00-445d-b8f8-b632babf2b3e-5wv7dgnIgG8@public.gmane.org>
2016-09-14 12:35 ` Marek Szyprowski
2016-09-14 12:35 ` Marek Szyprowski
[not found] ` <dc9f945f-2756-ab70-d061-9fdc7c5afdee-Sze3O3UU22JBDgjK7y7TUQ@public.gmane.org>
2016-09-14 13:25 ` Robin Murphy
2016-09-14 13:25 ` Robin Murphy
[not found] ` <bbdc42fa-ea35-945f-3e2a-e0ab03fc997d-5wv7dgnIgG8@public.gmane.org>
2016-09-15 7:08 ` Marek Szyprowski
2016-09-15 7:08 ` Marek Szyprowski
2016-09-13 12:14 ` [PATCH v7 00/22] Generic DT bindings for PCI IOMMUs and ARM SMMU Auger Eric
2016-09-13 12:14 ` Auger Eric
[not found] ` <92f27a6b-9752-516d-3924-c552fc6a5ace-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-09-13 12:40 ` Robin Murphy
2016-09-13 12:40 ` Robin Murphy
[not found] ` <e24821be-5cc4-52b3-f961-1eb32cf58293-5wv7dgnIgG8@public.gmane.org>
2016-09-13 12:57 ` Auger Eric
2016-09-13 12:57 ` Auger Eric
2016-09-14 8:41 ` Auger Eric
2016-09-14 8:41 ` Auger Eric
[not found] ` <11ebd81e-2ea5-5ff3-35b3-be95f03e05bd-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-09-14 9:20 ` Will Deacon
2016-09-14 9:20 ` Will Deacon
[not found] ` <20160914092051.GB19622-5wv7dgnIgG8@public.gmane.org>
2016-09-14 9:35 ` Auger Eric
2016-09-14 9:35 ` Auger Eric
2016-09-14 10:35 ` Robin Murphy
2016-09-14 10:35 ` Robin Murphy
[not found] ` <d03ea5e7-59f1-8b49-4ba2-d05fc2030ebc-5wv7dgnIgG8@public.gmane.org>
2016-09-14 12:32 ` Auger Eric
2016-09-14 12:32 ` Auger Eric
[not found] ` <04a0a682-4fdc-8d62-57cd-efdf730582c6-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-09-14 12:53 ` Robin Murphy
2016-09-14 12:53 ` Robin Murphy
[not found] ` <c2645c5e-edd3-2b31-4311-0ca621a915e2-5wv7dgnIgG8@public.gmane.org>
2016-09-15 9:29 ` Auger Eric
2016-09-15 9:29 ` Auger Eric
[not found] ` <4d87d5f2-0350-b5f8-ffc3-4e9377cf1f87-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-09-15 10:15 ` Robin Murphy
2016-09-15 10:15 ` Robin Murphy
[not found] ` <fc4ce398-4eeb-f2ca-b964-e9f466be79c4-5wv7dgnIgG8@public.gmane.org>
2016-09-15 16:46 ` Auger Eric
2016-09-15 16:46 ` Auger Eric
[not found] ` <1838c65d-5944-8946-781c-b420bea1acab-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-09-16 16:18 ` Robin Murphy
2016-09-16 16:18 ` Robin Murphy
[not found] ` <f16db032-1905-9804-0607-fe007af72b0e-5wv7dgnIgG8@public.gmane.org>
2016-09-19 12:13 ` Auger Eric
2016-09-19 12:13 ` Auger Eric
[not found] ` <48f3bc10-3966-7d50-d070-7ec7f0946c92-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2016-09-19 12:24 ` Will Deacon [this message]
2016-09-19 12:24 ` Will Deacon
[not found] ` <20160919122435.GD9005-5wv7dgnIgG8@public.gmane.org>
2016-09-19 12:41 ` Robin Murphy
2016-09-19 12:41 ` Robin Murphy
[not found] ` <99ee0946-c7ff-e6e4-08c1-ff686ea1a8a5-5wv7dgnIgG8@public.gmane.org>
2016-09-19 14:17 ` Will Deacon
2016-09-19 14:17 ` Will Deacon
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