linux-kernel - Re: [PATCH RFC 05/11] arm-smmu-v3/sva: Add SVA domain support

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Message-ID: <20220321115821.GL11336@nvidia.com>
Date:   Mon, 21 Mar 2022 08:58:21 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Jean-Philippe Brucker <jean-philippe@...aro.org>
Cc:     Lu Baolu <baolu.lu@...ux.intel.com>,
        Joerg Roedel <joro@...tes.org>,
        Christoph Hellwig <hch@...radead.org>,
        Kevin Tian <kevin.tian@...el.com>,
        Ashok Raj <ashok.raj@...el.com>, Will Deacon <will@...nel.org>,
        Robin Murphy <robin.murphy@....com>,
        Jean-Philippe Brucker <jean-philippe@...aro.com>,
        Eric Auger <eric.auger@...hat.com>,
        Liu Yi L <yi.l.liu@...el.com>,
        Jacob jun Pan <jacob.jun.pan@...el.com>,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH RFC 05/11] arm-smmu-v3/sva: Add SVA domain support

On Mon, Mar 21, 2022 at 11:31:19AM +0000, Jean-Philippe Brucker wrote:
> For now we could just return a naked struct iommu_domain. Sanity checks in
> arm_smmu_attach_dev() would be good too, a SVA domain can't be attached as
> a parent domain.

Now that we have per-domain ops the 'standard' arm_smmu_attach_dev()
cannot be called on a SVA iommu_domain already.

Jason