From: Will Deacon <will@kernel.org>
To: iommu@lists.linux-foundation.org
Cc: Vijay Kilary <vkilari@codeaurora.org>,
Jean-Philippe Brucker <jean-philippe.brucker@arm.com>,
Will Deacon <will@kernel.org>, Jan Glauber <jglauber@marvell.com>,
Alex Williamson <alex.williamson@redhat.com>,
Jayachandran Chandrasekharan Nair <jnair@marvell.com>,
Jon Masters <jcm@redhat.com>, Robin Murphy <robin.murphy@arm.com>
Subject: [RFC PATCH v2 00/19] Try to reduce lock contention on the SMMUv3 command queue
Date: Thu, 11 Jul 2019 18:19:08 +0100 [thread overview]
Message-ID: <20190711171927.28803-1-will@kernel.org> (raw)
Hi everyone,
This is a significant rework of the RFC I previously posted here:
https://lkml.kernel.org/r/20190611134603.4253-1-will.deacon@arm.com
But this time, it looks like it might actually be worthwhile according
to my perf profiles, where __iommu_unmap() falls a long way down the
profile for a multi-threaded netperf run. I'm still relying on others to
confirm this is useful, however.
Some of the changes since last time are:
* Support for constructing and submitting a list of commands in the
driver
* Numerous changes to the IOMMU and io-pgtable APIs so that we can
submit commands in batches
* Removal of cmpxchg() from cmdq_shared_lock() fast-path
* Code restructuring and cleanups
This current applies against my iommu/devel branch that Joerg has pulled
for 5.3. If you want to test it out, I've put everything here:
https://git.kernel.org/pub/scm/linux/kernel/git/will/linux.git/log/?h=iommu/cmdq
Feedback welcome. I appreciate that we're in the merge window, but I
wanted to get this on the list for people to look at as an RFC.
Cheers,
Will
--->8
Cc: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Jayachandran Chandrasekharan Nair <jnair@marvell.com>
Cc: Jan Glauber <jglauber@marvell.com>
Cc: Jon Masters <jcm@redhat.com>
Cc: Eric Auger <eric.auger@redhat.com>
Cc: Zhen Lei <thunder.leizhen@huawei.com>
Cc: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Vijay Kilary <vkilari@codeaurora.org>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: John Garry <john.garry@huawei.com>
Cc: Alex Williamson <alex.williamson@redhat.com>
Will Deacon (19):
iommu: Remove empty iommu_tlb_range_add() callback from iommu_ops
iommu/io-pgtable-arm: Remove redundant call to io_pgtable_tlb_sync()
iommu/io-pgtable: Rename iommu_gather_ops to iommu_flush_ops
iommu: Introduce struct iommu_iotlb_gather for batching TLB flushes
iommu: Introduce iommu_iotlb_gather_add_page()
iommu: Pass struct iommu_iotlb_gather to ->unmap() and ->iotlb_sync()
iommu/io-pgtable: Introduce tlb_flush_walk() and tlb_flush_leaf()
iommu/io-pgtable: Hook up ->tlb_flush_walk() and ->tlb_flush_leaf() in
drivers
iommu/io-pgtable-arm: Call ->tlb_flush_walk() and ->tlb_flush_leaf()
iommu/io-pgtable: Replace ->tlb_add_flush() with ->tlb_add_page()
iommu/io-pgtable: Remove unused ->tlb_sync() callback
iommu/io-pgtable: Pass struct iommu_iotlb_gather to ->unmap()
iommu/io-pgtable: Pass struct iommu_iotlb_gather to ->tlb_add_page()
iommu/arm-smmu-v3: Separate s/w and h/w views of prod and cons indexes
iommu/arm-smmu-v3: Drop unused 'q' argument from Q_OVF macro
iommu/arm-smmu-v3: Move low-level queue fields out of arm_smmu_queue
iommu/arm-smmu-v3: Operate directly on low-level queue where possible
iommu/arm-smmu-v3: Reduce contention during command-queue insertion
iommu/arm-smmu-v3: Defer TLB invalidation until ->iotlb_sync()
drivers/gpu/drm/panfrost/panfrost_mmu.c | 24 +-
drivers/iommu/amd_iommu.c | 11 +-
drivers/iommu/arm-smmu-v3.c | 856 ++++++++++++++++++++++++--------
drivers/iommu/arm-smmu.c | 103 +++-
drivers/iommu/dma-iommu.c | 9 +-
drivers/iommu/exynos-iommu.c | 3 +-
drivers/iommu/intel-iommu.c | 3 +-
drivers/iommu/io-pgtable-arm-v7s.c | 57 +--
drivers/iommu/io-pgtable-arm.c | 48 +-
drivers/iommu/iommu.c | 24 +-
drivers/iommu/ipmmu-vmsa.c | 28 +-
drivers/iommu/msm_iommu.c | 42 +-
drivers/iommu/mtk_iommu.c | 45 +-
drivers/iommu/mtk_iommu_v1.c | 3 +-
drivers/iommu/omap-iommu.c | 2 +-
drivers/iommu/qcom_iommu.c | 44 +-
drivers/iommu/rockchip-iommu.c | 2 +-
drivers/iommu/s390-iommu.c | 3 +-
drivers/iommu/tegra-gart.c | 12 +-
drivers/iommu/tegra-smmu.c | 2 +-
drivers/vfio/vfio_iommu_type1.c | 27 +-
include/linux/io-pgtable.h | 57 ++-
include/linux/iommu.h | 92 +++-
23 files changed, 1090 insertions(+), 407 deletions(-)
--
2.11.0
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next reply other threads:[~2019-07-11 17:28 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-11 17:19 Will Deacon [this message]
2019-07-11 17:19 ` [RFC PATCH v2 01/19] iommu: Remove empty iommu_tlb_range_add() callback from iommu_ops Will Deacon
2019-07-11 17:19 ` [RFC PATCH v2 02/19] iommu/io-pgtable-arm: Remove redundant call to io_pgtable_tlb_sync() Will Deacon
2019-07-11 17:19 ` [RFC PATCH v2 03/19] iommu/io-pgtable: Rename iommu_gather_ops to iommu_flush_ops Will Deacon
2019-07-11 17:19 ` [RFC PATCH v2 04/19] iommu: Introduce struct iommu_iotlb_gather for batching TLB flushes Will Deacon
2019-07-24 7:19 ` Joerg Roedel
2019-07-24 7:41 ` Will Deacon
2019-07-25 7:58 ` Joerg Roedel
2019-07-11 17:19 ` [RFC PATCH v2 05/19] iommu: Introduce iommu_iotlb_gather_add_page() Will Deacon
2019-07-11 17:19 ` [RFC PATCH v2 06/19] iommu: Pass struct iommu_iotlb_gather to ->unmap() and ->iotlb_sync() Will Deacon
2019-07-11 17:19 ` [RFC PATCH v2 07/19] iommu/io-pgtable: Introduce tlb_flush_walk() and tlb_flush_leaf() Will Deacon
2019-07-11 17:19 ` [RFC PATCH v2 08/19] iommu/io-pgtable: Hook up ->tlb_flush_walk() and ->tlb_flush_leaf() in drivers Will Deacon
2019-07-11 17:19 ` [RFC PATCH v2 09/19] iommu/io-pgtable-arm: Call ->tlb_flush_walk() and ->tlb_flush_leaf() Will Deacon
2019-07-11 17:19 ` [RFC PATCH v2 10/19] iommu/io-pgtable: Replace ->tlb_add_flush() with ->tlb_add_page() Will Deacon
2019-07-11 17:19 ` [RFC PATCH v2 11/19] iommu/io-pgtable: Remove unused ->tlb_sync() callback Will Deacon
2019-07-11 17:19 ` [RFC PATCH v2 12/19] iommu/io-pgtable: Pass struct iommu_iotlb_gather to ->unmap() Will Deacon
2019-07-11 17:19 ` [RFC PATCH v2 13/19] iommu/io-pgtable: Pass struct iommu_iotlb_gather to ->tlb_add_page() Will Deacon
2019-07-11 17:19 ` [RFC PATCH v2 14/19] iommu/arm-smmu-v3: Separate s/w and h/w views of prod and cons indexes Will Deacon
2019-07-11 17:19 ` [RFC PATCH v2 15/19] iommu/arm-smmu-v3: Drop unused 'q' argument from Q_OVF macro Will Deacon
2019-07-11 17:19 ` [RFC PATCH v2 16/19] iommu/arm-smmu-v3: Move low-level queue fields out of arm_smmu_queue Will Deacon
2019-07-11 17:19 ` [RFC PATCH v2 17/19] iommu/arm-smmu-v3: Operate directly on low-level queue where possible Will Deacon
2019-07-11 17:19 ` [RFC PATCH v2 18/19] iommu/arm-smmu-v3: Reduce contention during command-queue insertion Will Deacon
2019-07-19 11:04 ` John Garry
2019-07-24 12:15 ` Will Deacon
2019-07-24 14:03 ` John Garry
2019-07-24 14:07 ` Will Deacon
2019-07-24 8:20 ` John Garry
2019-07-24 14:33 ` Will Deacon
2019-07-25 11:31 ` John Garry
2019-07-11 17:19 ` [RFC PATCH v2 19/19] iommu/arm-smmu-v3: Defer TLB invalidation until ->iotlb_sync() Will Deacon
2019-07-19 4:25 ` [RFC PATCH v2 00/19] Try to reduce lock contention on the SMMUv3 command queue Ganapatrao Kulkarni
2019-07-24 12:28 ` Will Deacon
2019-07-24 9:58 ` John Garry
2019-07-24 12:20 ` Will Deacon
2019-07-24 14:25 ` John Garry
2019-07-24 14:48 ` Will Deacon
2019-07-25 10:11 ` John Garry
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