Re: [PATCH v12 09/17] iommu/vt-d: Add blocking domain support

[Jason Gunthorpe]

On Fri, Aug 26, 2022 at 08:11:33PM +0800, Lu Baolu wrote:
> The Intel IOMMU hardwares support blocking DMA transactions by clearing
> the translation table entries. This implements a real blocking domain to
> avoid using an empty UNMANAGED domain. The detach_dev callback of the
> domain ops is not used in any path. Remove it to avoid dead code as well.
> 
> Signed-off-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
> Tested-by: Tony Zhu <tony.zhu@xxxxxxxxx>
> ---
>  drivers/iommu/intel/iommu.c | 25 ++++++++++++++++++-------
>  1 file changed, 18 insertions(+), 7 deletions(-)

At this point I'd suggest to make a little series that does all the
blocking domain stuff in one shot

The removal of detach_dev callbacks is pretty nice for clarity.

Jason