linux-kernel - Re: [PATCH v2 1/3] iommufd: Add devices_users to track the hw

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Date:   Thu, 2 Feb 2023 11:03:08 -0400
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Nicolin Chen <nicolinc@...dia.com>
Cc:     kevin.tian@...el.com, yi.l.liu@...el.com, iommu@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/3] iommufd: Add devices_users to track the
 hw_pagetable usage by device

On Wed, Feb 01, 2023 at 11:28:05PM -0800, Nicolin Chen wrote:

> So, in short, we'll have to wait for ->domain_alloc_user()
> patch (in the nesting series) to unblock the problem that we
> discussed above regarding the iopt_table_add_domain().

I think that is probably OK

It would be good to prepare a SMMUv3 patch assuming Robin's stuff
lands to move the domain iopt determination to allocate so we are
ready.

Jason