linux-kernel - Re: [PATCH v2 0/6] IOMMUFD: Deliver IO page faults to user space

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Message-ID: <20231204153209.GN1489931@ziepe.ca>
Date:   Mon, 4 Dec 2023 11:32:09 -0400
From:   Jason Gunthorpe <jgg@...pe.ca>
To:     Joel Granados <j.granados@...sung.com>
Cc:     Lu Baolu <baolu.lu@...ux.intel.com>,
        Kevin Tian <kevin.tian@...el.com>,
        Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>,
        Robin Murphy <robin.murphy@....com>,
        Jean-Philippe Brucker <jean-philippe@...aro.org>,
        Nicolin Chen <nicolinc@...dia.com>,
        Yi Liu <yi.l.liu@...el.com>,
        Jacob Pan <jacob.jun.pan@...ux.intel.com>,
        iommu@...ts.linux.dev, linux-kselftest@...r.kernel.org,
        virtualization@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/6] IOMMUFD: Deliver IO page faults to user space

On Mon, Dec 04, 2023 at 04:07:44PM +0100, Joel Granados wrote:
> On Thu, Oct 26, 2023 at 10:49:24AM +0800, Lu Baolu wrote:
> > Hi folks,
> > 
> > This series implements the functionality of delivering IO page faults to
> > user space through the IOMMUFD framework for nested translation. Nested
> Does this mean the IOPF_CAPABLE HWPT needs to be parented by a HWPT
> created with IOMMU_HWPT_ALLOC_NEST_PARENT set?

I would expect no. Both a nested and un-nested configuration should
work.

Jason