[git pull] IOMMU Updates for Linux v5.10

[git pull] IOMMU Updates for Linux v5.10

[Joerg Roedel]

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Hi Linus,

there is a minor conflict this time in include/linux/iommu.h which
should be easy to resolve. I would attach my resolution, but somehow git
[show|log] didn't show it to me.

The conflict is in a function signature, specifically the type of the
pasid parameter. My resolution used iopasid_t.

With that in mind:

The following changes since commit 549738f15da0e5a00275977623be199fbbf7df50:

  Linux 5.9-rc8 (2020-10-04 16:04:34 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git tags/iommu-updates-v5.10

for you to fetch changes up to 7e3c3883c381aeda903778d7e99fc4cd523be610:

  Merge branches 'arm/allwinner', 'arm/mediatek', 'arm/renesas', 'arm/tegra', 'arm/qcom', 'arm/smmu', 'ppc/pamu', 'x86/amd', 'x86/vt-d' and 'core' into next (2020-10-07 11:51:59 +0200)

----------------------------------------------------------------
IOMMU Updates for Linux v5.10

Including:

	- ARM-SMMU Updates from Will:

	  - Continued SVM enablement, where page-table is shared with
	    CPU

	  - Groundwork to support integrated SMMU with Adreno GPU

	  - Allow disabling of MSI-based polling on the kernel
	    command-line

	  - Minor driver fixes and cleanups (octal permissions, error
	    messages, ...)

	- Secure Nested Paging Support for AMD IOMMU. The IOMMU will
	  fault when a device tries DMA on memory owned by a guest. This
	  needs new fault-types as well as a rewrite of the IOMMU memory
	  semaphore for command completions.

	- Allow broken Intel IOMMUs (wrong address widths reported) to
	  still be used for interrupt remapping.

	- IOMMU UAPI updates for supporting vSVA, where the IOMMU can
	  access address spaces of processes running in a VM.

	- Support for the MT8167 IOMMU in the Mediatek IOMMU driver.

	- Device-tree updates for the Renesas driver to support r8a7742.

	- Several smaller fixes and cleanups all over the place.

----------------------------------------------------------------
Alex Dewar (1):
      iommu/pamu: Replace use of kzfree with kfree_sensitive

Andy Shevchenko (1):
      iommu/vt-d: Move intel_iommu_gfx_mapped to Intel IOMMU header

Barry Song (3):
      iommu/arm-smmu-v3: replace symbolic permissions by octal permissions for module parameter
      iommu/arm-smmu-v3: replace module_param_named by module_param for disable_bypass
      iommu/arm-smmu-v3: permit users to disable msi polling

David Woodhouse (1):
      iommu/vt-d: Gracefully handle DMAR units with no supported address widths

Dmitry Osipenko (1):
      iommu/tegra-smmu: Add locking around mapping operations

Fabien Parent (3):
      dt-bindings: iommu: Add binding for MediaTek MT8167 IOMMU
      iommu/mediatek: Add flag for legacy ivrp paddr
      iommu/mediatek: Add support for MT8167

Jacob Pan (6):
      docs: IOMMU user API
      iommu/uapi: Add argsz for user filled data
      iommu/uapi: Use named union for user data
      iommu/uapi: Rename uapi functions
      iommu/uapi: Handle data and argsz filled by users
      iommu/vt-d: Check UAPI data processed by IOMMU core

Jean-Philippe Brucker (9):
      iommu/arm-smmu-v3: Fix endianness annotations
      arm64: mm: Pin down ASIDs for sharing mm with devices
      arm64: cpufeature: Export symbol read_sanitised_ftr_reg()
      iommu/io-pgtable-arm: Move some definitions to a header
      iommu/arm-smmu-v3: Move definitions to a header
      iommu/arm-smmu-v3: Share process page tables
      iommu/arm-smmu-v3: Seize private ASID
      iommu/arm-smmu-v3: Check for SVA features
      iommu/arm-smmu-v3: Add SVA device feature

Joerg Roedel (3):
      iommu/sun50i: Fix set-but-not-used variable warning
      Merge tag 'arm-smmu-updates' of git://git.kernel.org/.../will/linux into arm/smmu
      Merge branches 'arm/allwinner', 'arm/mediatek', 'arm/renesas', 'arm/tegra', 'arm/qcom', 'arm/smmu', 'ppc/pamu', 'x86/amd', 'x86/vt-d' and 'core' into next

Jordan Crouse (3):
      iommu/arm-smmu: Pass io-pgtable config to implementation specific function
      iommu/arm-smmu: Add support for split pagetables
      iommu/arm-smmu: Prepare for the adreno-smmu implementation

Krzysztof Kozlowski (5):
      iommu/mediatek: Drop of_match_ptr to fix -Wunused-const-variable
      iommu/amd: Add missing function prototypes to fix -Wmissing-prototypes
      iommu/amd: Fix kerneldoc comments
      iommu/vt-d: Drop kerneldoc marker from regular comment
      iommu/qcom: Drop of_match_ptr to fix -Wunused-const-variable

Lad Prabhakar (4):
      dt-bindings: iommu: renesas,ipmmu-vmsa: Sort compatible string in increasing number of the SoC
      dt-bindings: iommu: renesas,ipmmu-vmsa: Add r8a7742 support
      ARM: dts: r8a7742: Add IPMMU DT nodes
      iommu/renesas: Update help description for IPMMU_VMSA config

Lu Baolu (1):
      iommu/vt-d: Use device numa domain if RHSA is missing

Miles Chen (1):
      iommu/mediatek: Check 4GB mode by reading infracfg

Nicolin Chen (5):
      iommu/tegra-smmu: Fix tlb_mask
      memory: tegra: Correct num_tlb_lines for tegra210
      iommu/tegra-smmu: Do not use PAGE_SHIFT and PAGE_MASK
      iommu/tegra-smmu: Fix iova->phys translation
      iommu/tegra-smmu: Allow to group clients in same swgroup

Rob Clark (1):
      iommu/arm-smmu: Constify some helpers

Robin Murphy (1):
      iommu/dma: Remove broken huge page handling

Suravee Suthikulpanit (3):
      iommu/amd: Use 4K page for completion wait write-back semaphore
      iommu/amd: Add support for RMP_PAGE_FAULT and RMP_HW_ERR
      iommu/amd: Re-purpose Exclusion range registers to support SNP CWWB

Thierry Reding (3):
      iommu/tegra-smmu: Set IOMMU group name
      iommu/tegra-smmu: Balance IOMMU group reference count
      iommu/tegra-smmu: Prune IOMMU group when it is released

Tom Murphy (2):
      iommu: Rename iommu_tlb_* functions to iommu_iotlb_*
      iommu/dma: Handle init_iova_flush_queue() failure in dma-iommu path

Will Deacon (1):
      Merge branch 'for-next/svm' of git://git.kernel.org/.../arm64/linux into for-joerg/arm-smmu/updates

Yu Kuai (1):
      iommu/qcom: add missing put_device() call in qcom_iommu_of_xlate()

Yuqi Jin (1):
      iommu/iova: Replace cmpxchg with xchg in queue_iova

Zenghui Yu (1):
      iommu/arm-smmu-v3: Fix l1 stream table size in the error message

Zhou Wang (1):
      iommu/arm-smmu-v3: Ensure queue is read after updating prod pointer

 .../devicetree/bindings/iommu/mediatek,iommu.txt   |   2 +
 .../bindings/iommu/renesas,ipmmu-vmsa.yaml         |   3 +-
 Documentation/userspace-api/iommu.rst              | 209 +++++
 MAINTAINERS                                        |   4 +-
 arch/arm/boot/dts/r8a7742.dtsi                     |  48 ++
 arch/arm64/include/asm/barrier.h                   |   1 +
 arch/arm64/include/asm/io.h                        |   1 +
 arch/arm64/include/asm/mmu.h                       |   3 +
 arch/arm64/include/asm/mmu_context.h               |  11 +-
 arch/arm64/kernel/cpufeature.c                     |   1 +
 arch/arm64/mm/context.c                            | 105 ++-
 drivers/iommu/Kconfig                              |  12 +-
 drivers/iommu/amd/amd_iommu.h                      |   9 +
 drivers/iommu/amd/amd_iommu_types.h                |   6 +-
 drivers/iommu/amd/init.c                           |  48 +-
 drivers/iommu/amd/iommu.c                          |  90 ++-
 drivers/iommu/arm/arm-smmu-v3/Makefile             |   5 +-
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c    | 248 ++++++
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c        | 843 ++++-----------------
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h        | 723 ++++++++++++++++++
 drivers/iommu/arm/arm-smmu/arm-smmu-impl.c         |   3 +-
 drivers/iommu/arm/arm-smmu/arm-smmu.c              | 102 +--
 drivers/iommu/arm/arm-smmu/arm-smmu.h              |  84 +-
 drivers/iommu/arm/arm-smmu/qcom_iommu.c            |  12 +-
 drivers/iommu/dma-iommu.c                          |  22 +-
 drivers/iommu/fsl_pamu.c                           |   2 +-
 drivers/iommu/intel/dmar.c                         |  48 +-
 drivers/iommu/intel/iommu.c                        |  62 +-
 drivers/iommu/intel/svm.c                          |  13 +-
 drivers/iommu/io-pgtable-arm.c                     |  27 +-
 drivers/iommu/io-pgtable-arm.h                     |  30 +
 drivers/iommu/iommu.c                              | 200 ++++-
 drivers/iommu/iova.c                               |   2 +-
 drivers/iommu/mtk_iommu.c                          |  49 +-
 drivers/iommu/mtk_iommu.h                          |   1 +
 drivers/iommu/sun50i-iommu.c                       |  15 +-
 drivers/iommu/tegra-smmu.c                         | 138 +++-
 drivers/memory/tegra/tegra210.c                    |   2 +-
 drivers/vfio/vfio_iommu_type1.c                    |   2 +-
 include/drm/intel-gtt.h                            |   5 +-
 include/dt-bindings/memory/mt8167-larb-port.h      |  51 ++
 include/linux/intel-iommu.h                        |   1 +
 include/linux/io-pgtable.h                         |   2 +-
 include/linux/iommu.h                              |  45 +-
 include/linux/soc/mediatek/infracfg.h              |   3 +
 include/uapi/linux/iommu.h                         |  18 +-
 46 files changed, 2372 insertions(+), 939 deletions(-)
 create mode 100644 Documentation/userspace-api/iommu.rst
 create mode 100644 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
 create mode 100644 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h
 create mode 100644 drivers/iommu/io-pgtable-arm.h
 create mode 100644 include/dt-bindings/memory/mt8167-larb-port.h

Please pull.

Thanks,

	Joerg

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Re: [git pull] IOMMU Updates for Linux v5.10

[Linus Torvalds]

On Tue, Oct 13, 2020 at 9:04 AM Joerg Roedel <joro@8bytes.org> wrote:
>
> there is a minor conflict this time in include/linux/iommu.h which
> should be easy to resolve. I would attach my resolution, but somehow git
> [show|log] didn't show it to me.

So when a resolution takes one side over the other (as opposed to
mixing two sides), then "git show" doesn't show it as a conflict any
more.

The reason is simple: at "git merge" time, git figures out the common
base, so it has all of "base", "side1" and "side2" to look at and does
a three-way diff (for the simplified normal case). So it can see it as
a conflict, because it sees both where you came from, and where you
ended up.

But once you have resolved the conflict and committed the end result,
"git show" (and "git log") doesn't do the whole expensive "what was
the base" thing any more. "git show" just sees the parents (so "side1"
and "side2") and the end result, but doesn't really see - or care -
about the fact that some time in the distant past you also had that
"base" state.

As a result, "git show" doesn't ever really understand the notion of a
"merge conflict", and all it shows is really "whee, this end result
looks like neither side" as a kind of pseudo-conflict diff.

Anyway, thanks for the describing the conflict, it was indeed not
complicated, this email is just to explain your "but somehow git
[show|log] didn't show it to me" thing.

                   Linus
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Re: [git pull] IOMMU Updates for Linux v5.10

[pr-tracker-bot]

The pull request you sent on Tue, 13 Oct 2020 18:03:58 +0200:

> git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git tags/iommu-updates-v5.10

has been merged into torvalds/linux.git:
https://git.kernel.org/torvalds/c/531d29b0b674036347a04c08c0898ff1aa522180

Thank you!

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Re: [git pull] IOMMU Updates for Linux v5.10

[Joerg Roedel]

On Wed, Oct 14, 2020 at 12:15:55PM -0700, Linus Torvalds wrote:
> As a result, "git show" doesn't ever really understand the notion of a
> "merge conflict", and all it shows is really "whee, this end result
> looks like neither side" as a kind of pseudo-conflict diff.

Ah okay, that makes sense. Thanks for the explanation.

> Anyway, thanks for the describing the conflict, it was indeed not
> complicated, this email is just to explain your "but somehow git
> [show|log] didn't show it to me" thing.

Yeah, next time I try to get the diff before commiting the merge, that
probably works better. A diff is better than describing conflict
resolutions verbally.

Regards,

	Joerg
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