Re: [PATCH v7 03/14] IOMMU/x86: support freeing of pagetables

["Durrant, Paul" <xadimgnik@xxxxxxxxx>]

On 05/07/2022 13:44, Jan Beulich wrote:
> For vendor specific code to support superpages we need to be able to
> deal with a superpage mapping replacing an intermediate page table (or
> hierarchy thereof). Consequently an iommu_alloc_pgtable() counterpart is
> needed to free individual page tables while a domain is still alive.
> Since the freeing needs to be deferred until after a suitable IOTLB
> flush was performed, released page tables get queued for processing by a
> tasklet.
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
> Reviewed-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
Reviewed-by: Paul Durrant <paul@xxxxxxx>