Re: [PATCH 7/7] iommu/vt-d: Refine intel_iommu_domain_alloc_user()

[Jason Gunthorpe]

On Fri, Oct 11, 2024 at 12:27:22PM +0800, Lu Baolu wrote:
> The domain_alloc_user ops should always allocate a guest-compatible page
> table unless specific allocation flags are specified.
> 
> Currently, IOMMU_HWPT_ALLOC_NEST_PARENT and IOMMU_HWPT_ALLOC_DIRTY_TRACKING
> require special handling, as both require hardware support for scalable
> mode and second-stage translation. In such cases, the driver should select
> a second-stage page table for the paging domain.
> 
> Suggested-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
> Signed-off-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>
> ---
>  drivers/iommu/intel/iommu.c | 17 +++++++++++++++--
>  1 file changed, 15 insertions(+), 2 deletions(-)

Reviewed-by: Jason Gunthorpe <jgg@xxxxxxxxxx>

Jason