[PATCH v5 4/5] iommu: Introduce iommu_dev_reset_prepare() and iommu_dev_reset_done()

[Tian, Kevin]

> From: Nicolin Chen <nicolinc at nvidia.com>
> Sent: Tuesday, November 11, 2025 1:13 PM
> 
> + *
> + * This function attaches all RID/PASID of the device's to
> IOMMU_DOMAIN_BLOCKED
> + * allowing any blocked-domain-supporting IOMMU driver to pause
> translation and

__iommu_group_alloc_blocking_domain() will allocate a paging
domain if a driver doesn't support blocked_domain itself. So in the
end this applies to all IOMMU drivers.

I saw several other places mention IOMMU_DOMAIN_BLOCKED in this
series. Not very accurate.