linux-kernel - RE: [PATCH v5 04/11] iommu/vt-d: Add helper to setup pasid nested translation

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Message-ID: <BN9PR11MB52766CFA874D8775869E918F8CD7A@BN9PR11MB5276.namprd11.prod.outlook.com>
Date:   Mon, 16 Oct 2023 08:30:35 +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>,
        "Martins, Joao" <joao.m.martins@...cle.com>,
        Jacob Pan <jacob.jun.pan@...ux.intel.com>
Subject: RE: [PATCH v5 04/11] iommu/vt-d: Add helper to setup pasid nested
 translation

> From: Liu, Yi L <yi.l.liu@...el.com>
> Sent: Friday, October 13, 2023 8:40 PM
> 
> >> + *
> >> + * This is used for nested translation based vIOMMU. e.g. guest IOVA and
> >> + * guest shared virtual address. In this case, the first-level page tables
> >> + * are used for GVA/GIOVA-GPA translation in the guest, the second-level
> >> + * page tables are used for GPA-HPA translation.
> >
> > No need to mention guest or vIOMMU. Just stick to the fact of
> > nested configuration.
> 
> how about below?
> 
> * This is used for nested translation. The input domain should be
> * nested type and nested on a parent with 'is_nested_parent' flag
> * set.

* This is used for nested translation. The input domain should be
* the nested type with the parent having 'is_nested_parent' flag set.