Hi Robin,
> From: Robin Murphy, Sent: Friday, June 14, 2019 6:55 PM
>
> On 13/06/2019 11:20, Yoshihiro Shimoda wrote:
> > +bool blk_queue_can_use_iommu_merging(struct request_queue *q,
> > +struct device *dev)
> > +{
> > + struct iommu_domain *domain;
> > +
> >
On 13/06/2019 11:20, Yoshihiro Shimoda wrote:
This patch adds a helper function whether a queue can merge
the segments by an IOMMU.
Signed-off-by: Yoshihiro Shimoda
---
block/blk-settings.c | 28
include/linux/blkdev.h | 2 ++
2 files changed, 30
I'm a little worried about this directly calling into the iommu
API instead of going through the DMA mapping code. We still have
plenty of iommus not using the iommu layer for DMA mapping. But at
least this code is in the block layer and not the driver, so maybe
we can live with it.
This patch adds a helper function whether a queue can merge
the segments by an IOMMU.
Signed-off-by: Yoshihiro Shimoda
---
block/blk-settings.c | 28
include/linux/blkdev.h | 2 ++
2 files changed, 30 insertions(+)
diff --git a/block/blk-settings.c
