linux-kernel - RE: [PATCH 01/17] iommu: Add new iommu op to create domains owned by userspace

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Date:   Fri, 10 Feb 2023 08:24:00 +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>
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>,
        "baolu.lu@...ux.intel.com" <baolu.lu@...ux.intel.com>
Subject: RE: [PATCH 01/17] iommu: Add new iommu op to create domains owned by
 userspace

> From: Liu, Yi L <yi.l.liu@...el.com>
> Sent: Thursday, February 9, 2023 12:32 PM
> 
> From: Lu Baolu <baolu.lu@...ux.intel.com>
> 
> Introduce a new iommu_domain op to create domains owned by userspace,
> e.g. through iommufd. These domains have a few different properties
> compares to kernel owned domains:
> 
>  - They may be MANAGED domains, but created with special parameters.
>    For instance aperture size changes/number of levels, different
>    IOPTE formats, or other things necessary to make a vIOMMU work
> 

what is *MANAGED* domain?

today we only have the separation between DMA domain and
UNMANAGED domain.

soon with Jason's cleanup all domains are called UNMANAGED.