I described the optimization more detail in patch 1 and 2, and patch 3-5 are
the implementation on arm-smmu/arm-smmu-v3 of patch 2.
Patch 1 is v2. In v1, I directly replaced writel with writel_relaxed in
queue_inc_prod. But Robin figured that it may lead SMMU consume stale
memory contents. I thought more than 3 whole days and got this one.
This patchset is based on Robin Murphy's [PATCH v2 0/8] io-pgtable lock removal.
Zhen Lei (5):
iommu/arm-smmu-v3: put off the execution of TLBI* to reduce lock
confliction
iommu: add a new member unmap_tlb_sync into struct iommu_ops
iommu/arm-smmu-v3: add support for unmap an iova range with only one
tlb sync
iommu/arm-smmu: add support for unmap a memory range with only one tlb
sync
iommu/io-pgtable: delete member tlb_sync_pending of struct io_pgtable
drivers/iommu/arm-smmu-v3.c | 52 ++++++++++++++++++++++++++++++++++----
drivers/iommu/arm-smmu.c | 10 ++++++++
drivers/iommu/io-pgtable-arm-v7s.c | 32 +++++++++++++++--------
drivers/iommu/io-pgtable-arm.c | 30 ++++++++++++++--------
drivers/iommu/io-pgtable.h | 9 ++-----
drivers/iommu/iommu.c | 3 +++
include/linux/iommu.h | 1 +
7 files changed, 104 insertions(+), 33 deletions(-)
--
2.5.0
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