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

From: Nicolin Chen <redacted>
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>