diff options
| author | Tom Murphy <[email protected]> | 2020-11-24 16:20:51 +0800 |
|---|---|---|
| committer | Will Deacon <[email protected]> | 2020-11-25 12:03:48 +0000 |
| commit | 2a2b8eaa5b25668a6f717f94b55f4e3aaf87629d (patch) | |
| tree | 93b3b75f1def62809f901b1a852834fe4cc1ef71 /include/linux | |
| parent | 66930e7e1e58880046a0d39eacccf67e8027d980 (diff) | |
iommu: Handle freelists when using deferred flushing in iommu drivers
Allow the iommu_unmap_fast to return newly freed page table pages and
pass the freelist to queue_iova in the dma-iommu ops path.
This is useful for iommu drivers (in this case the intel iommu driver)
which need to wait for the ioTLB to be flushed before newly
free/unmapped page table pages can be freed. This way we can still batch
ioTLB free operations and handle the freelists.
Signed-off-by: Tom Murphy <[email protected]>
Signed-off-by: Lu Baolu <[email protected]>
Tested-by: Logan Gunthorpe <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Will Deacon <[email protected]>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/iommu.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h index b95a6f8db6ff..e56bae327e35 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -180,6 +180,7 @@ struct iommu_iotlb_gather { unsigned long start; unsigned long end; size_t pgsize; + struct page *freelist; }; /** |