diff options
| author | Will Deacon <will.deacon@arm.com> | 2018-10-01 12:42:49 +0100 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2018-10-01 13:01:31 +0100 |
| commit | 7d321bd3542500caf125249f44dc37cb4e738013 (patch) | |
| tree | dbe77095cb6a0166aeb7ce0abe9a6f6c885695d7 /Documentation | |
| parent | 07fdef34d2be6811f00c6f9e4e2a1483cf86696c (diff) | |
iommu/arm-smmu: Ensure that page-table updates are visible before TLBI
The IO-pgtable code relies on the driver TLB invalidation callbacks to
ensure that all page-table updates are visible to the IOMMU page-table
walker.
In the case that the page-table walker is cache-coherent, we cannot rely
on an implicit DSB from the DMA-mapping code, so we must ensure that we
execute a DSB in our tlb_add_flush() callback prior to triggering the
invalidation.
Cc: <stable@vger.kernel.org>
Cc: Robin Murphy <robin.murphy@arm.com>
Fixes: 2df7a25ce4a7 ("iommu/arm-smmu: Clean up DMA API usage")
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'Documentation')
0 files changed, 0 insertions, 0 deletions