RE: [PATCH v7 4/9] iommufd/selftest: Add mock_domain_cache_invalidate_user support

[Tian, Kevin]

> From: Liu, Yi L <yi.l.liu@xxxxxxxxx>
> Sent: Thursday, December 21, 2023 11:40 PM
> +
> +
> +		if ((inv.flags & IOMMU_TEST_INVALIDATE_FLAG_ALL) &&
> +		    (inv.flags &
> IOMMU_TEST_INVALIDATE_FLAG_TRIGGER_ERROR)) {
> +			rc = -EINVAL;
> +			break;
> +		}
> +

a  nit. is there a reason why the two flags can not be set together?

in concept a mock iommu error could occur in either invalidate-one
or invalidate-all.

otherwise,

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