[PATCH v3 2/4] iommu/io-pgtable-arm: Add read_and_clear_dirty() support

[Tian, Kevin]

> From: Jason Gunthorpe <jgg at nvidia.com>
> Sent: Thursday, May 23, 2024 1:51 AM
> 
> diff --git a/drivers/iommu/iommufd/iommufd_private.h
> b/drivers/iommu/iommufd/iommufd_private.h
> index 991f864d1f9bc1..de3761e15cab54 100644
> --- a/drivers/iommu/iommufd/iommufd_private.h
> +++ b/drivers/iommu/iommufd/iommufd_private.h
> @@ -52,6 +52,7 @@ struct io_pagetable {
>  	/* IOVA that cannot be allocated, struct iopt_reserved */
>  	struct rb_root_cached reserved_itree;
>  	u8 disable_large_pages;
> +	u8 dirty_tracking_enabled;
>  	unsigned long iova_alignment;
>  };
> 

should it be a hwpt flag instead?