[RESEND,v9,00/13] iommu: Shared Virtual Addressing for SMMUv3 (PT sharing part)

Message

Jean-Philippe Brucker Aug. 17, 2020, 5:15 p.m. UTC

This is version 9 of the page table sharing support for SMMUv3, rebased
onto v5.9-rc1.

v9 resend:
* Rebased onto v5.9-rc1. Moved to drivers/iommu/arm/arm-smmu-v3/ as a
  result.

v9: https://lore.kernel.org/linux-iommu/[e-mail]/
* Moved most of the SVA code to arm-smmu-v3-sva.c. This required moving
  struct definitions and macros to arm-smmu-v3.h (patch 7), hence the
  new 700 insertions/deletions in the diffstat.
* Updated patches 4 and 8 following review.
* Fixed a bug when replacing a private ASID.

v8: https://lore.kernel.org/linux-iommu/[e-mail]/
* Split SVA series into three parts: page table sharing, I/O page
  faults, and additional features (DVM, VHE and HTTU).

Fenghua Yu (1):
  mm: Define pasid in mm

Jean-Philippe Brucker (12):
  iommu/ioasid: Add ioasid references
  iommu/sva: Add PASID helpers
  arm64: mm: Pin down ASIDs for sharing mm with devices
  iommu/io-pgtable-arm: Move some definitions to a header
  arm64: cpufeature: Export symbol read_sanitised_ftr_reg()
  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
  iommu/arm-smmu-v3: Implement iommu_sva_bind/unbind()
  iommu/arm-smmu-v3: Hook up ATC invalidation to mm ops

 drivers/iommu/Kconfig                         |  17 +
 drivers/iommu/Makefile                        |   1 +
 drivers/iommu/arm/arm-smmu-v3/Makefile        |   5 +-
 arch/arm64/include/asm/mmu.h                  |   3 +
 arch/arm64/include/asm/mmu_context.h          |  11 +-
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h   | 752 +++++++++++++++
 drivers/iommu/io-pgtable-arm.h                |  30 +
 drivers/iommu/iommu-sva-lib.h                 |  15 +
 include/linux/ioasid.h                        |  10 +-
 include/linux/mm_types.h                      |   4 +
 arch/arm64/kernel/cpufeature.c                |   1 +
 arch/arm64/mm/context.c                       | 105 ++-
 .../iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c   | 487 ++++++++++
 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c   | 860 ++++--------------
 drivers/iommu/intel/iommu.c                   |   4 +-
 drivers/iommu/intel/svm.c                     |   6 +-
 drivers/iommu/io-pgtable-arm.c                |  27 +-
 drivers/iommu/ioasid.c                        |  38 +-
 drivers/iommu/iommu-sva-lib.c                 |  85 ++
 MAINTAINERS                                   |   3 +-
 20 files changed, 1729 insertions(+), 735 deletions(-)
 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 drivers/iommu/iommu-sva-lib.h
 create mode 100644 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c
 create mode 100644 drivers/iommu/iommu-sva-lib.c

Comments

Joerg Roedel Sept. 4, 2020, 9:08 a.m. UTC | #1

On Mon, Aug 17, 2020 at 07:15:46PM +0200, Jean-Philippe Brucker wrote:
> Jean-Philippe Brucker (12):
>   iommu/ioasid: Add ioasid references
>   iommu/sva: Add PASID helpers
>   arm64: mm: Pin down ASIDs for sharing mm with devices
>   iommu/io-pgtable-arm: Move some definitions to a header
>   arm64: cpufeature: Export symbol read_sanitised_ftr_reg()
>   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
>   iommu/arm-smmu-v3: Implement iommu_sva_bind/unbind()
>   iommu/arm-smmu-v3: Hook up ATC invalidation to mm ops

Looks like the mm parts still need Acks/Reviews?

Jean-Philippe Brucker Sept. 17, 2020, 2:36 p.m. UTC | #2

On Fri, Sep 04, 2020 at 11:08:34AM +0200, Joerg Roedel wrote:
> On Mon, Aug 17, 2020 at 07:15:46PM +0200, Jean-Philippe Brucker wrote:
> > Jean-Philippe Brucker (12):
> >   iommu/ioasid: Add ioasid references
> >   iommu/sva: Add PASID helpers
> >   arm64: mm: Pin down ASIDs for sharing mm with devices
> >   iommu/io-pgtable-arm: Move some definitions to a header
> >   arm64: cpufeature: Export symbol read_sanitised_ftr_reg()
> >   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
> >   iommu/arm-smmu-v3: Implement iommu_sva_bind/unbind()
> >   iommu/arm-smmu-v3: Hook up ATC invalidation to mm ops
> 
> Looks like the mm parts still need Acks/Reviews?
> 

Yes, I was hoping that the original [1] would get an ack or review.
Hopefully it will get picked up for 5.10, but I'll also Cc the mm list in
my v10.

Thanks,
Jean

[1] https://lore.kernel.org/linux-iommu/[e-mail]/T/#u