A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-09 21:59:12 -04:00
Code Issues Projects Releases Packages Wiki Activity

iommu: arm-smmu: skip tlb flush during unmap

Browse source 
With fragmented physical memory, mappings are generated of lower granule.
This increases the unmap latency of large buffers.  When not supporting
demand paging in smmu, unmap can defer the invalidation till next map.
This change aggregates invalidations across multiple unmaps till a new
mapping is created on that context. The new mapping can be using an iova
previously unmapped hence the stale TLB can cause issue. Hence invalidate
the TLB during map.

Change-Id: I1d64227ca075067a43075729ba26be684126d679
Signed-off-by: Prakash Gupta <guptap@codeaurora.org>
This commit is contained in:
Prakash Gupta 2020-12-04 00:20:32 +05:30
commit c765bad7cc
1 changed files with 0 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

1
drivers/iommu/arm-smmu.c
View file

@ -3288,7 +3288,6 @@ static size_t arm_smmu_unmap(struct iommu_domain *domain, unsigned long iova,
arm_smmu_rpm_get(smmu);
spin_lock_irqsave(&smmu_domain->cb_lock, flags);
ret = ops->unmap(ops, iova, size, gather);
arm_smmu_deferred_flush(smmu_domain);
spin_unlock_irqrestore(&smmu_domain->cb_lock, flags);
arm_smmu_rpm_put(smmu);