[PATCH 0/8] io-pgtable lock removal

Hi Robin,

On 6/8/2017 7:51 AM, Robin Murphy wrote:

Hi all,

Here's the cleaned up nominally-final version of the patches everybody's
keen to see. #1 is just a non-critical thing-I-spotted-in-passing fix,
#2-#4 do some preparatory work (and bid farewell to everyone's least
favourite bit of code, hooray!), and #5-#8 do the dirty deed itself.

The branch I've previously shared has been updated too:

   git://linux-arm.org/linux-rm  iommu/pgtable

All feedback welcome, as I'd really like to land this for 4.13.

I tested the series on a QDF2400 development platform and see notable
performance improvements particularly in workloads that make concurrent
accesses to a single iommu_domain.

Robin.


Robin Murphy (8):
   iommu/io-pgtable-arm-v7s: Check table PTEs more precisely
   iommu/io-pgtable-arm: Improve split_blk_unmap
   iommu/io-pgtable-arm-v7s: Refactor split_blk_unmap
   iommu/io-pgtable: Introduce explicit coherency
   iommu/io-pgtable-arm: Support lockless operation
   iommu/io-pgtable-arm-v7s: Support lockless operation
   iommu/arm-smmu: Remove io-pgtable spinlock
   iommu/arm-smmu-v3: Remove io-pgtable spinlock

  drivers/iommu/arm-smmu-v3.c        |  36 ++-----
  drivers/iommu/arm-smmu.c           |  48 ++++------
  drivers/iommu/io-pgtable-arm-v7s.c | 173 +++++++++++++++++++++------------
  drivers/iommu/io-pgtable-arm.c     | 190 ++++++++++++++++++++++++-------------
  drivers/iommu/io-pgtable.h         |   6 ++
  5 files changed, 268 insertions(+), 185 deletions(-)

-- 
Qualcomm Datacenter Technologies as an affiliate of Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.