linux-kernel - Re: [RFC v16 1/9] iommu: Introduce attach/detach_pasid

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Date:   Mon, 6 Dec 2021 11:48:23 +0100
From:   Joerg Roedel <joro@...tes.org>
To:     Eric Auger <eric.auger@...hat.com>
Cc:     eric.auger.pro@...il.com, iommu@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org, kvm@...r.kernel.org,
        kvmarm@...ts.cs.columbia.edu, will@...nel.org,
        robin.murphy@....com, jean-philippe@...aro.org,
        zhukeqian1@...wei.com, alex.williamson@...hat.com,
        jacob.jun.pan@...ux.intel.com, yi.l.liu@...el.com,
        kevin.tian@...el.com, ashok.raj@...el.com, maz@...nel.org,
        peter.maydell@...aro.org, vivek.gautam@....com,
        shameerali.kolothum.thodi@...wei.com, wangxingang5@...wei.com,
        jiangkunkun@...wei.com, yuzenghui@...wei.com,
        nicoleotsuka@...il.com, chenxiang66@...ilicon.com,
        sumitg@...dia.com, nicolinc@...dia.com, vdumpa@...dia.com,
        zhangfei.gao@...aro.org, zhangfei.gao@...il.com,
        lushenming@...wei.com, vsethi@...dia.com
Subject: Re: [RFC v16 1/9] iommu: Introduce attach/detach_pasid_table API

On Wed, Oct 27, 2021 at 12:44:20PM +0200, Eric Auger wrote:
> Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@....com>
> Signed-off-by: Liu, Yi L <yi.l.liu@...ux.intel.com>
> Signed-off-by: Ashok Raj <ashok.raj@...el.com>
> Signed-off-by: Jacob Pan <jacob.jun.pan@...ux.intel.com>
> Signed-off-by: Eric Auger <eric.auger@...hat.com>

This Signed-of-by chain looks dubious, you are the author but the last
one in the chain?

> +int iommu_uapi_attach_pasid_table(struct iommu_domain *domain,
> +				  void __user *uinfo)
> +{

[...]

> +	if (pasid_table_data.format == IOMMU_PASID_FORMAT_SMMUV3 &&
> +	    pasid_table_data.argsz <
> +		offsetofend(struct iommu_pasid_table_config, vendor_data.smmuv3))
> +		return -EINVAL;

This check looks like it belongs in driver specific code.

Regards,

	Joerg