diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/generic_pt/common.h | 6 | ||||
| -rw-r--r-- | include/linux/generic_pt/iommu.h | 7 |
2 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/generic_pt/common.h b/include/linux/generic_pt/common.h index 96f8a6a7d60e..883069e32952 100644 --- a/include/linux/generic_pt/common.h +++ b/include/linux/generic_pt/common.h @@ -86,6 +86,12 @@ enum { */ enum pt_features { /** + * @PT_FEAT_DMA_INCOHERENT: Cache flush page table memory before + * assuming the HW can read it. Otherwise a SMP release is sufficient + * for HW to read it. + */ + PT_FEAT_DMA_INCOHERENT, + /** * @PT_FEAT_FULL_VA: The table can span the full VA range from 0 to * PT_VADDR_MAX. */ diff --git a/include/linux/generic_pt/iommu.h b/include/linux/generic_pt/iommu.h index fde7ccf007c5..21132e342a79 100644 --- a/include/linux/generic_pt/iommu.h +++ b/include/linux/generic_pt/iommu.h @@ -57,6 +57,13 @@ struct pt_iommu { * table walkers. */ int nid; + + /** + * @iommu_device: Device pointer used for any DMA cache flushing when + * PT_FEAT_DMA_INCOHERENT. This is the iommu device that created the + * page table which must have dma ops that perform cache flushing. + */ + struct device *iommu_device; }; /** |