linux-kernel - RE: [PATCH v7 3/9] iommu: Add iommu_copy_struct_from_user

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Date: Fri, 22 Dec 2023 03:25:49 +0000
From: "Tian, Kevin" <kevin.tian@...el.com>
To: "Liu, Yi L" <yi.l.liu@...el.com>, "joro@...tes.org" <joro@...tes.org>,
	"alex.williamson@...hat.com" <alex.williamson@...hat.com>, "jgg@...dia.com"
	<jgg@...dia.com>, "robin.murphy@....com" <robin.murphy@....com>,
	"baolu.lu@...ux.intel.com" <baolu.lu@...ux.intel.com>
CC: "cohuck@...hat.com" <cohuck@...hat.com>, "eric.auger@...hat.com"
	<eric.auger@...hat.com>, "nicolinc@...dia.com" <nicolinc@...dia.com>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>, "mjrosato@...ux.ibm.com"
	<mjrosato@...ux.ibm.com>, "chao.p.peng@...ux.intel.com"
	<chao.p.peng@...ux.intel.com>, "yi.y.sun@...ux.intel.com"
	<yi.y.sun@...ux.intel.com>, "peterx@...hat.com" <peterx@...hat.com>,
	"jasowang@...hat.com" <jasowang@...hat.com>,
	"shameerali.kolothum.thodi@...wei.com"
	<shameerali.kolothum.thodi@...wei.com>, "lulu@...hat.com" <lulu@...hat.com>,
	"suravee.suthikulpanit@....com" <suravee.suthikulpanit@....com>,
	"iommu@...ts.linux.dev" <iommu@...ts.linux.dev>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-kselftest@...r.kernel.org" <linux-kselftest@...r.kernel.org>, "Duan,
 Zhenzhong" <zhenzhong.duan@...el.com>, "joao.m.martins@...cle.com"
	<joao.m.martins@...cle.com>, "Zeng, Xin" <xin.zeng@...el.com>, "Zhao, Yan Y"
	<yan.y.zhao@...el.com>, "j.granados@...sung.com" <j.granados@...sung.com>
Subject: RE: [PATCH v7 3/9] iommu: Add iommu_copy_struct_from_user_array
 helper

> From: Liu, Yi L <yi.l.liu@...el.com>
> Sent: Thursday, December 21, 2023 11:40 PM
> 
> From: Nicolin Chen <nicolinc@...dia.com>
> 
> Wrap up the data pointer/num sanity and __iommu_copy_struct_from_user
> call for iommu drivers to copy driver specific data at a specific location
> in the struct iommu_user_data_array, and
> iommu_respond_struct_to_user_array()
> to copy response to a specific location in the struct iommu_user_data_array.
> 
> And expect it to be used in cache_invalidate_user ops for example.
> 
> Signed-off-by: Nicolin Chen <nicolinc@...dia.com>
> Co-developed-by: Yi Liu <yi.l.liu@...el.com>
> Signed-off-by: Yi Liu <yi.l.liu@...el.com>

Reviewed-by: Kevin Tian <kevin.tian@...el.com>