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Message-ID: <ZAtjYFMio7t66KWy@nvidia.com>
Date:   Fri, 10 Mar 2023 13:05:36 -0400
From:   Jason Gunthorpe <jgg@...dia.com>
To:     Eric Auger <eric.auger@...hat.com>
Cc:     Nicolin Chen <nicolinc@...dia.com>, robin.murphy@....com,
        will@...nel.org, kevin.tian@...el.com, baolu.lu@...ux.intel.com,
        joro@...tes.org, shameerali.kolothum.thodi@...wei.com,
        jean-philippe@...aro.org, linux-arm-kernel@...ts.infradead.org,
        iommu@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 05/14] iommu/arm-smmu-v3: Remove ARM_SMMU_DOMAIN_NESTED

On Fri, Mar 10, 2023 at 05:39:22PM +0100, Eric Auger wrote:

> > Also drop the unused arm_smmu_enable_nesting(). One following patche will
> > configure the correct smmu_domain->stage.
> >
> > Signed-off-by: Nicolin Chen <nicolinc@...dia.com>
> > ---
> >  drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 18 ------------------
> >  drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h |  1 -
> If you go this way you may also remove it from arm/arm-smmu/arm-smmu.c.
> Then if I am not wrong no other driver does implement enable_nesting cb.
> Shouldn't we also remove it and fellow iommu_enable_nesting()?

Yes, lets just put this patch in the series please:

https://lore.kernel.org/kvm/0-v1-0093c9b0e345+19-vfio_no_nesting_jgg@nvidia.com/

Jason

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