From: Will Deacon <will.deacon-5wv7dgnIgG8@public.gmane.org> To: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Cc: Will Deacon <will.deacon-5wv7dgnIgG8@public.gmane.org>, laurent.pinchart-ryLnwIuWjnjg/C1BVhZhaw@public.gmane.org, Varun.Sethi-KZfg59tc24xl57MIdRCFDg@public.gmane.org, prem.mallappa-dY08KVG/lbpWk0Htik3J/w@public.gmane.org, Robin.Murphy-5wv7dgnIgG8@public.gmane.org Subject: [PATCH 0/4] Generic IOMMU page table framework Date: Thu, 27 Nov 2014 11:51:14 +0000 [thread overview] Message-ID: <1417089078-22900-1-git-send-email-will.deacon@arm.com> (raw) Hi all, This series introduces a generic IOMMU page table allocation framework, implements support for ARM long-descriptors and then ports the arm-smmu driver over to the new code. There are a few reasons for doing this: - Page table code is hard, and I don't enjoy shopping - A number of IOMMUs actually use the same table format, but currently duplicate the code - It provides a CPU (and architecture) independent allocator, which may be useful for some systems where the CPU is using a different table format for its own mappings As illustrated in the final patch, an IOMMU driver interacts with the allocator by passing in a configuration structure describing the input and output address ranges, the supported pages sizes and a set of ops for performing various TLB invalidation and PTE flushing routines. The LPAE code implements support for 4k/2M/1G, 16k/32M and 64k/512M mappings, but I decided not to implement the contiguous bit in the interest of trying to keep the code semi-readable. This could always be added later, if needed. I also included some self-tests for the LPAE implementation. Ideally we'd merge these, but I'm also happy to drop them if there are objections. Tested with the self-tests, but also VFIO + MMU-500 at stage-1 and stage-2. Patches taken against my iommu/devel branch (queued by Joerg for 3.19). All feedback welcome. Will --->8 Will Deacon (4): iommu: introduce generic page table allocation framework iommu: add ARM LPAE page table allocator iommu: add self-consistency tests to ARM LPAE IO page table allocator iommu/arm-smmu: make use of generic LPAE allocator MAINTAINERS | 1 + arch/arm64/Kconfig | 1 - drivers/iommu/Kconfig | 32 +- drivers/iommu/Makefile | 2 + drivers/iommu/arm-smmu.c | 872 +++++++++++--------------------------- drivers/iommu/io-pgtable-arm.c | 925 +++++++++++++++++++++++++++++++++++++++++ drivers/iommu/io-pgtable.c | 78 ++++ drivers/iommu/io-pgtable.h | 77 ++++ 8 files changed, 1361 insertions(+), 627 deletions(-) create mode 100644 drivers/iommu/io-pgtable-arm.c create mode 100644 drivers/iommu/io-pgtable.c create mode 100644 drivers/iommu/io-pgtable.h -- 2.1.1
WARNING: multiple messages have this Message-ID (diff)
From: will.deacon@arm.com (Will Deacon) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH 0/4] Generic IOMMU page table framework Date: Thu, 27 Nov 2014 11:51:14 +0000 [thread overview] Message-ID: <1417089078-22900-1-git-send-email-will.deacon@arm.com> (raw) Hi all, This series introduces a generic IOMMU page table allocation framework, implements support for ARM long-descriptors and then ports the arm-smmu driver over to the new code. There are a few reasons for doing this: - Page table code is hard, and I don't enjoy shopping - A number of IOMMUs actually use the same table format, but currently duplicate the code - It provides a CPU (and architecture) independent allocator, which may be useful for some systems where the CPU is using a different table format for its own mappings As illustrated in the final patch, an IOMMU driver interacts with the allocator by passing in a configuration structure describing the input and output address ranges, the supported pages sizes and a set of ops for performing various TLB invalidation and PTE flushing routines. The LPAE code implements support for 4k/2M/1G, 16k/32M and 64k/512M mappings, but I decided not to implement the contiguous bit in the interest of trying to keep the code semi-readable. This could always be added later, if needed. I also included some self-tests for the LPAE implementation. Ideally we'd merge these, but I'm also happy to drop them if there are objections. Tested with the self-tests, but also VFIO + MMU-500 at stage-1 and stage-2. Patches taken against my iommu/devel branch (queued by Joerg for 3.19). All feedback welcome. Will --->8 Will Deacon (4): iommu: introduce generic page table allocation framework iommu: add ARM LPAE page table allocator iommu: add self-consistency tests to ARM LPAE IO page table allocator iommu/arm-smmu: make use of generic LPAE allocator MAINTAINERS | 1 + arch/arm64/Kconfig | 1 - drivers/iommu/Kconfig | 32 +- drivers/iommu/Makefile | 2 + drivers/iommu/arm-smmu.c | 872 +++++++++++--------------------------- drivers/iommu/io-pgtable-arm.c | 925 +++++++++++++++++++++++++++++++++++++++++ drivers/iommu/io-pgtable.c | 78 ++++ drivers/iommu/io-pgtable.h | 77 ++++ 8 files changed, 1361 insertions(+), 627 deletions(-) create mode 100644 drivers/iommu/io-pgtable-arm.c create mode 100644 drivers/iommu/io-pgtable.c create mode 100644 drivers/iommu/io-pgtable.h -- 2.1.1
next reply other threads:[~2014-11-27 11:51 UTC|newest] Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top 2014-11-27 11:51 Will Deacon [this message] 2014-11-27 11:51 ` [PATCH 0/4] Generic IOMMU page table framework Will Deacon [not found] ` <1417089078-22900-1-git-send-email-will.deacon-5wv7dgnIgG8@public.gmane.org> 2014-11-27 11:51 ` [PATCH 1/4] iommu: introduce generic page table allocation framework Will Deacon 2014-11-27 11:51 ` Will Deacon [not found] ` <1417089078-22900-2-git-send-email-will.deacon-5wv7dgnIgG8@public.gmane.org> 2014-11-30 22:00 ` Laurent Pinchart 2014-11-30 22:00 ` Laurent Pinchart 2014-12-01 12:13 ` Will Deacon 2014-12-01 12:13 ` Will Deacon [not found] ` <20141201121338.GD18466-5wv7dgnIgG8@public.gmane.org> 2014-12-01 13:33 ` Laurent Pinchart 2014-12-01 13:33 ` Laurent Pinchart 2014-12-01 13:53 ` Will Deacon 2014-12-01 13:53 ` Will Deacon 2014-12-14 23:46 ` Laurent Pinchart 2014-12-14 23:46 ` Laurent Pinchart 2014-12-15 9:45 ` Will Deacon 2014-12-15 9:45 ` Will Deacon 2014-11-27 11:51 ` [PATCH 2/4] iommu: add ARM LPAE page table allocator Will Deacon 2014-11-27 11:51 ` Will Deacon [not found] ` <1417089078-22900-3-git-send-email-will.deacon-5wv7dgnIgG8@public.gmane.org> 2014-11-30 23:29 ` Laurent Pinchart 2014-11-30 23:29 ` Laurent Pinchart 2014-12-01 17:23 ` Will Deacon 2014-12-01 17:23 ` Will Deacon [not found] ` <20141201172315.GI18466-5wv7dgnIgG8@public.gmane.org> 2014-12-01 20:21 ` Laurent Pinchart 2014-12-01 20:21 ` Laurent Pinchart 2014-12-02 9:41 ` Will Deacon 2014-12-02 9:41 ` Will Deacon [not found] ` <20141202094156.GB9917-5wv7dgnIgG8@public.gmane.org> 2014-12-02 11:47 ` Laurent Pinchart 2014-12-02 11:47 ` Laurent Pinchart 2014-12-05 18:48 ` Will Deacon 2014-12-05 18:48 ` Will Deacon 2014-12-02 22:41 ` Mitchel Humpherys 2014-12-02 22:41 ` Mitchel Humpherys [not found] ` <vnkw8uipznbj.fsf-Yf+dfxj6toJBVvN7MMdr1KRtKmQZhJ7pQQ4Iyu8u01E@public.gmane.org> 2014-12-03 11:11 ` Will Deacon 2014-12-03 11:11 ` Will Deacon 2014-12-05 10:55 ` Varun Sethi 2014-12-05 10:55 ` Varun Sethi [not found] ` <BN3PR0301MB12198CE5D736CDC6A221EDC2EA790-CEkquS/Gb81uuip9JPHoc5wN6zqB+hSMnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org> 2014-12-05 18:48 ` Will Deacon 2014-12-05 18:48 ` Will Deacon [not found] ` <20141205184802.GH1203-5wv7dgnIgG8@public.gmane.org> 2014-12-14 17:45 ` Varun Sethi 2014-12-14 17:45 ` Varun Sethi [not found] ` <BN3PR0301MB1219D3161E4E9DB314FDD8FAEA6E0-CEkquS/Gb81uuip9JPHoc5wN6zqB+hSMnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org> 2014-12-15 13:30 ` Will Deacon 2014-12-15 13:30 ` Will Deacon [not found] ` <20141215133020.GJ20738-5wv7dgnIgG8@public.gmane.org> 2014-12-15 15:43 ` Will Deacon 2014-12-15 15:43 ` Will Deacon 2014-12-15 16:35 ` Varun Sethi 2014-12-15 16:35 ` Varun Sethi [not found] ` <BN3PR0301MB12194A8F5CFF870B7A124623EA6F0-CEkquS/Gb81uuip9JPHoc5wN6zqB+hSMnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org> 2014-12-15 17:25 ` Will Deacon 2014-12-15 17:25 ` Will Deacon 2014-12-15 16:43 ` Varun Sethi 2014-12-15 16:43 ` Varun Sethi [not found] ` <BN3PR0301MB12199C5CAD33E745CC7E51F4EA6F0-CEkquS/Gb81uuip9JPHoc5wN6zqB+hSMnBOFsp37pqbUKgpGm//BTAC/G2K4zDHf@public.gmane.org> 2014-12-15 17:20 ` Will Deacon 2014-12-15 17:20 ` Will Deacon 2014-11-27 11:51 ` [PATCH 3/4] iommu: add self-consistency tests to ARM LPAE IO " Will Deacon 2014-11-27 11:51 ` Will Deacon 2014-11-27 11:51 ` [PATCH 4/4] iommu/arm-smmu: make use of generic LPAE allocator Will Deacon 2014-11-27 11:51 ` Will Deacon 2014-11-30 22:03 ` [PATCH 0/4] Generic IOMMU page table framework Laurent Pinchart 2014-11-30 22:03 ` Laurent Pinchart 2014-12-01 12:05 ` Will Deacon 2014-12-01 12:05 ` Will Deacon [not found] ` <20141201120534.GC18466-5wv7dgnIgG8@public.gmane.org> 2014-12-02 13:47 ` Laurent Pinchart 2014-12-02 13:47 ` Laurent Pinchart 2014-12-02 13:53 ` Will Deacon 2014-12-02 13:53 ` Will Deacon [not found] ` <20141202135356.GF9917-5wv7dgnIgG8@public.gmane.org> 2014-12-02 22:29 ` Laurent Pinchart 2014-12-02 22:29 ` Laurent Pinchart 2014-12-14 23:49 ` Laurent Pinchart 2014-12-14 23:49 ` Laurent Pinchart 2014-12-15 16:10 ` Will Deacon 2014-12-15 16:10 ` Will Deacon [not found] ` <20141215161052.GM20738-5wv7dgnIgG8@public.gmane.org> 2014-12-15 17:33 ` Laurent Pinchart 2014-12-15 17:33 ` Laurent Pinchart 2014-12-15 17:39 ` Will Deacon 2014-12-15 17:39 ` Will Deacon [not found] ` <20141215173911.GT20738-5wv7dgnIgG8@public.gmane.org> 2014-12-15 17:46 ` Laurent Pinchart 2014-12-15 17:46 ` Laurent Pinchart
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