[GIT PULL] iommu/arm-smmu: Updates for 5.15

[Will Deacon]

Hi Joerg,

Please pull these Arm SMMU updates for 5.15. There's not tonnes here, but
a good mixture of optimisations and cleanups -- summary in the tag.

This applies cleanly against iommu/next, but I suspect it will conflict
with Robin's series on the list. Please shout if you need anything from
me to help with that (e.g. rebase, checking a merge conflict).

Cheers,

Will

--->8

The following changes since commit ff1176468d368232b684f75e82563369208bc371:

  Linux 5.14-rc3 (2021-07-25 15:35:14 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/will/linux.git tags/arm-smmu-updates

for you to fetch changes up to fac956710ab0812f9e395e9f7a27da551412830f:

  iommu/arm-smmu-v3: Stop pre-zeroing batch commands (2021-08-13 14:26:06 +0100)

----------------------------------------------------------------
Arm SMMU updates for 5.15

- SMMUv3

  * Minor optimisation to avoid zeroing struct members on CMD submission

  * Increased use of batched commands to reduce submission latency

  * Refactoring in preparation for ECMDQ support

- SMMUv2

  * Fix races when probing devices with identical StreamIDs

  * Optimise walk cache flushing for Qualcomm implementations

  * Allow deep sleep states for some Qualcomm SoCs with shared clocks

----------------------------------------------------------------
Ashish Mhetre (1):
      iommu: Fix race condition during default domain allocation

John Garry (2):
      iommu/arm-smmu-v3: Remove some unneeded init in arm_smmu_cmdq_issue_cmdlist()
      iommu/arm-smmu-v3: Stop pre-zeroing batch commands

Krishna Reddy (1):
      iommu/arm-smmu: Fix race condition during iommu_group creation

Sai Prakash Ranjan (2):
      iommu/arm-smmu: Add clk_bulk_{prepare/unprepare} to system pm callbacks
      iommu/arm-smmu: Optimize ->tlb_flush_walk() for qcom implementation

Zhen Lei (4):
      iommu/arm-smmu-v3: Use command queue batching helpers to improve performance
      iommu/arm-smmu-v3: Add and use static helper function arm_smmu_cmdq_issue_cmd_with_sync()
      iommu/arm-smmu-v3: Add and use static helper function arm_smmu_get_cmdq()
      iommu/arm-smmu-v3: Extract reusable function __arm_smmu_cmdq_skip_err()

 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 89 +++++++++++++++++------------
 drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c  | 11 ++++
 drivers/iommu/arm/arm-smmu/arm-smmu.c       | 45 ++++++++++++---
 drivers/iommu/arm/arm-smmu/arm-smmu.h       |  1 +
 drivers/iommu/iommu.c                       |  2 +
 5 files changed, 106 insertions(+), 42 deletions(-)