IOMMU Archive on lore.kernel.org
 help / color / Atom feed
From: Jean-Philippe Brucker <jean-philippe@linaro.org>
To: iommu@lists.linux-foundation.org, devicetree@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, linux-pci@vger.kernel.org,
	linux-mm@kvack.org
Cc: mark.rutland@arm.com, kevin.tian@intel.com,
	catalin.marinas@arm.com, robin.murphy@arm.com,
	robh+dt@kernel.org, zhangfei.gao@linaro.org, will@kernel.org,
	christian.koenig@amd.com
Subject: [PATCH v4 00/26] iommu: Shared Virtual Addressing and SMMUv3 support
Date: Mon, 24 Feb 2020 19:23:35 +0100
Message-ID: <20200224182401.353359-1-jean-philippe@linaro.org> (raw)

Shared Virtual Addressing (SVA) allows to share process page tables with
devices using the IOMMU. Add a generic implementation of the IOMMU SVA
API, and add support in the Arm SMMUv3 driver.

Previous versions of this patchset were sent over a year ago [1][2] but
we've made a lot of progress since then:

* ATS support for SMMUv3 was merged in v5.2.
* The bind() and fault reporting APIs have been merged in v5.3.
* IOASID were added in v5.5.
* SMMUv3 PASID was added in v5.6, with some pending for v5.7.

* The first user of the bind() API will be merged in v5.7 [3]. The zip
  accelerator is also the first piece of hardware that I've been able to
  use for testing (previous versions were developed with software models)
  and I now have tools for evaluating SVA performance. Unfortunately I
  still don't have hardware that supports ATS and PRI; the zip accelerator
  uses stall.

These are the remaining changes for SVA support in SMMUv3. Since v3 [1]
I fixed countless bugs and - I think - addressed everyone's comments.
Thanks to recent MMU notifier rework, iommu-sva.c is a lot more
straightforward. I'm still unhappy with the complicated locking in the
SMMUv3 driver resulting from patch 12 (Seize private ASID), but I
haven't found anything better.

Please find all SVA patches on branches sva/current and sva/zip-devel at
https://jpbrucker.net/git/linux

[1] https://lore.kernel.org/linux-iommu/20180920170046.20154-1-jean-philippe.brucker@arm.com/
[2] https://lore.kernel.org/linux-iommu/20180511190641.23008-1-jean-philippe.brucker@arm.com/
[3] https://lore.kernel.org/linux-iommu/1581407665-13504-1-git-send-email-zhangfei.gao@linaro.org/

Jean-Philippe Brucker (26):
  mm/mmu_notifiers: pass private data down to alloc_notifier()
  iommu/sva: Manage process address spaces
  iommu: Add a page fault handler
  iommu/sva: Search mm by PASID
  iommu/iopf: Handle mm faults
  iommu/sva: Register page fault handler
  arm64: mm: Pin down ASIDs for sharing mm with devices
  iommu/io-pgtable-arm: Move some definitions to a header
  iommu/arm-smmu-v3: Manage ASIDs with xarray
  arm64: cpufeature: Export symbol read_sanitised_ftr_reg()
  iommu/arm-smmu-v3: Share process page tables
  iommu/arm-smmu-v3: Seize private ASID
  iommu/arm-smmu-v3: Add support for VHE
  iommu/arm-smmu-v3: Enable broadcast TLB maintenance
  iommu/arm-smmu-v3: Add SVA feature checking
  iommu/arm-smmu-v3: Add dev_to_master() helper
  iommu/arm-smmu-v3: Implement mm operations
  iommu/arm-smmu-v3: Hook up ATC invalidation to mm ops
  iommu/arm-smmu-v3: Add support for Hardware Translation Table Update
  iommu/arm-smmu-v3: Maintain a SID->device structure
  iommu/arm-smmu-v3: Ratelimit event dump
  dt-bindings: document stall property for IOMMU masters
  iommu/arm-smmu-v3: Add stall support for platform devices
  PCI/ATS: Add PRI stubs
  PCI/ATS: Export symbols of PRI functions
  iommu/arm-smmu-v3: Add support for PRI

 .../devicetree/bindings/iommu/iommu.txt       |   18 +
 arch/arm64/include/asm/mmu.h                  |    1 +
 arch/arm64/include/asm/mmu_context.h          |   11 +-
 arch/arm64/kernel/cpufeature.c                |    1 +
 arch/arm64/mm/context.c                       |  103 +-
 drivers/iommu/Kconfig                         |   13 +
 drivers/iommu/Makefile                        |    2 +
 drivers/iommu/arm-smmu-v3.c                   | 1354 +++++++++++++++--
 drivers/iommu/io-pgfault.c                    |  533 +++++++
 drivers/iommu/io-pgtable-arm.c                |   27 +-
 drivers/iommu/io-pgtable-arm.h                |   30 +
 drivers/iommu/iommu-sva.c                     |  596 ++++++++
 drivers/iommu/iommu-sva.h                     |   64 +
 drivers/iommu/iommu.c                         |    1 +
 drivers/iommu/of_iommu.c                      |    5 +-
 drivers/misc/sgi-gru/grutlbpurge.c            |    4 +-
 drivers/pci/ats.c                             |    4 +
 include/linux/iommu.h                         |   73 +
 include/linux/mmu_notifier.h                  |   10 +-
 include/linux/pci-ats.h                       |    8 +
 mm/mmu_notifier.c                             |    6 +-
 21 files changed, 2699 insertions(+), 165 deletions(-)
 create mode 100644 drivers/iommu/io-pgfault.c
 create mode 100644 drivers/iommu/io-pgtable-arm.h
 create mode 100644 drivers/iommu/iommu-sva.c
 create mode 100644 drivers/iommu/iommu-sva.h

-- 
2.25.0

_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu

             reply index

Thread overview: 68+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-24 18:23 Jean-Philippe Brucker [this message]
2020-02-24 18:23 ` [PATCH v4 01/26] mm/mmu_notifiers: pass private data down to alloc_notifier() Jean-Philippe Brucker
2020-02-24 19:00   ` Jason Gunthorpe
2020-02-25  9:24     ` Jean-Philippe Brucker
2020-02-25 14:08       ` Jason Gunthorpe
2020-02-28 14:39         ` Jean-Philippe Brucker
2020-02-28 14:48           ` Jason Gunthorpe
2020-02-28 15:04             ` Jean-Philippe Brucker
2020-02-28 15:13               ` Jason Gunthorpe
2020-03-06  9:56                 ` Jean-Philippe Brucker
2020-03-06 13:09                   ` Jason Gunthorpe
2020-03-06 14:35                     ` Jean-Philippe Brucker
2020-03-06 14:52                       ` Jason Gunthorpe
2020-03-06 16:15                         ` Jean-Philippe Brucker
2020-03-06 17:42                           ` Jason Gunthorpe
2020-03-13 18:49                             ` Jean-Philippe Brucker
2020-03-13 19:13                               ` Jason Gunthorpe
2020-03-16 15:46                     ` Christoph Hellwig
2020-03-17 18:40                       ` Jason Gunthorpe
2020-03-05 16:36   ` Christoph Hellwig
2020-02-24 18:23 ` [PATCH v4 02/26] iommu/sva: Manage process address spaces Jean-Philippe Brucker
2020-02-26 12:35   ` Jonathan Cameron
2020-02-28 14:43     ` Jean-Philippe Brucker
2020-02-28 16:26       ` Jonathan Cameron
2020-02-26 19:13   ` Jacob Pan
2020-02-28 14:40     ` Jean-Philippe Brucker
2020-02-28 14:57       ` Jason Gunthorpe
2020-02-24 18:23 ` [PATCH v4 03/26] iommu: Add a page fault handler Jean-Philippe Brucker
2020-02-25  3:30   ` Xu Zaibo
2020-02-25  9:25     ` Jean-Philippe Brucker
2020-02-26  3:05       ` Xu Zaibo
2020-02-26 13:59   ` Jonathan Cameron
2020-02-28 14:44     ` Jean-Philippe Brucker
2020-02-24 18:23 ` [PATCH v4 04/26] iommu/sva: Search mm by PASID Jean-Philippe Brucker
2020-02-24 18:23 ` [PATCH v4 05/26] iommu/iopf: Handle mm faults Jean-Philippe Brucker
2020-02-24 18:23 ` [PATCH v4 06/26] iommu/sva: Register page fault handler Jean-Philippe Brucker
2020-02-26 19:39   ` Jacob Pan
2020-02-28 14:44     ` Jean-Philippe Brucker
2020-02-24 18:23 ` [PATCH v4 07/26] arm64: mm: Pin down ASIDs for sharing mm with devices Jean-Philippe Brucker
2020-02-27 17:43   ` Jonathan Cameron
2020-03-04 14:10     ` Jean-Philippe Brucker
2020-02-24 18:23 ` [PATCH v4 08/26] iommu/io-pgtable-arm: Move some definitions to a header Jean-Philippe Brucker
2020-02-24 18:23 ` [PATCH v4 09/26] iommu/arm-smmu-v3: Manage ASIDs with xarray Jean-Philippe Brucker
2020-02-24 18:23 ` [PATCH v4 10/26] arm64: cpufeature: Export symbol read_sanitised_ftr_reg() Jean-Philippe Brucker
2020-02-24 18:23 ` [PATCH v4 11/26] iommu/arm-smmu-v3: Share process page tables Jean-Philippe Brucker
2020-02-24 18:23 ` [PATCH v4 12/26] iommu/arm-smmu-v3: Seize private ASID Jean-Philippe Brucker
2020-02-24 18:23 ` [PATCH v4 13/26] iommu/arm-smmu-v3: Add support for VHE Jean-Philippe Brucker
2020-02-24 18:23 ` [PATCH v4 14/26] iommu/arm-smmu-v3: Enable broadcast TLB maintenance Jean-Philippe Brucker
2020-02-24 18:23 ` [PATCH v4 15/26] iommu/arm-smmu-v3: Add SVA feature checking Jean-Philippe Brucker
2020-02-24 18:23 ` [PATCH v4 16/26] iommu/arm-smmu-v3: Add dev_to_master() helper Jean-Philippe Brucker
2020-02-24 18:23 ` [PATCH v4 17/26] iommu/arm-smmu-v3: Implement mm operations Jean-Philippe Brucker
2020-02-24 18:23 ` [PATCH v4 18/26] iommu/arm-smmu-v3: Hook up ATC invalidation to mm ops Jean-Philippe Brucker
2020-02-24 18:23 ` [PATCH v4 19/26] iommu/arm-smmu-v3: Add support for Hardware Translation Table Update Jean-Philippe Brucker
2020-02-24 18:23 ` [PATCH v4 20/26] iommu/arm-smmu-v3: Maintain a SID->device structure Jean-Philippe Brucker
2020-02-24 18:23 ` [PATCH v4 21/26] iommu/arm-smmu-v3: Ratelimit event dump Jean-Philippe Brucker
2020-02-24 18:23 ` [PATCH v4 22/26] dt-bindings: document stall property for IOMMU masters Jean-Philippe Brucker
2020-02-24 18:23 ` [PATCH v4 23/26] iommu/arm-smmu-v3: Add stall support for platform devices Jean-Philippe Brucker
2020-02-26  8:44   ` Xu Zaibo
2020-03-04 14:09     ` Jean-Philippe Brucker
2020-02-27 18:17   ` Jonathan Cameron
2020-03-04 14:08     ` Jean-Philippe Brucker
2020-03-09 10:48       ` Jonathan Cameron
2020-02-24 18:23 ` [PATCH v4 24/26] PCI/ATS: Add PRI stubs Jean-Philippe Brucker
2020-02-27 20:55   ` Bjorn Helgaas
2020-02-24 18:24 ` [PATCH v4 25/26] PCI/ATS: Export symbols of PRI functions Jean-Philippe Brucker
2020-02-27 20:55   ` Bjorn Helgaas
2020-02-24 18:24 ` [PATCH v4 26/26] iommu/arm-smmu-v3: Add support for PRI Jean-Philippe Brucker
2020-02-27 18:22 ` [PATCH v4 00/26] iommu: Shared Virtual Addressing and SMMUv3 support Jonathan Cameron

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200224182401.353359-1-jean-philippe@linaro.org \
    --to=jean-philippe@linaro.org \
    --cc=catalin.marinas@arm.com \
    --cc=christian.koenig@amd.com \
    --cc=devicetree@vger.kernel.org \
    --cc=iommu@lists.linux-foundation.org \
    --cc=kevin.tian@intel.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-mm@kvack.org \
    --cc=linux-pci@vger.kernel.org \
    --cc=mark.rutland@arm.com \
    --cc=robh+dt@kernel.org \
    --cc=robin.murphy@arm.com \
    --cc=will@kernel.org \
    --cc=zhangfei.gao@linaro.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

IOMMU Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-iommu/0 linux-iommu/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-iommu linux-iommu/ https://lore.kernel.org/linux-iommu \
		iommu@lists.linux-foundation.org
	public-inbox-index linux-iommu

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.linux-foundation.lists.iommu


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git