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

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Message-ID: <115a6f87-11e5-5af8-eba2-60305177e554@linux.intel.com>
Date:   Sat, 11 Feb 2023 11:16:12 +0800
From:   Baolu Lu <baolu.lu@...ux.intel.com>
To:     "Tian, Kevin" <kevin.tian@...el.com>,
        "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:     baolu.lu@...ux.intel.com, "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>
Subject: Re: [PATCH 01/17] iommu: Add new iommu op to create domains owned by
 userspace

On 2023/2/10 16:24, Tian, Kevin wrote:
>> 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.

It should be UNMANAGED domain.

Best regards,
baolu