RE: [PATCH v5 13/29] iommufd/viommu: Introduce IOMMUFD_OBJ_HW_QUEUE and its related struct

Tian, Kevin
2025-05-23T08:09:13Z

> From: Nicolin Chen <nicolinc@nvidia.com>
> Sent: Sunday, May 18, 2025 11:22 AM
>
> +
> +enum iommufd_viommu_flags {
> + /*
> + * The HW does not go through an address translation table but
> reads the
> + * physical address space directly: iommufd core should pin the
> physical
> + * pages backing the queue memory that's allocated for the HW
> QUEUE, and
> + * ensure those physical pages are contiguous in the physical space.
> + */
> + IOMMUFD_VIOMMU_FLAG_HW_QUEUE_READS_PA = 1 << 0,
> +};

The queue itself doesn't read an address.

What about 'QUEUE_BASE_PA'?

Reviewed-by: Kevin Tian <kevin.tian@intel.com>