Re: [PATCH 06/10] vfio-iommufd: Allow iommufd to be used in place of a container fd

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To: "Tian, Kevin" <kevin.tian@xxxxxxxxx>
Subject: Re: [PATCH 06/10] vfio-iommufd: Allow iommufd to be used in place of a container fd
From: Nicolin Chen <nicolinc@xxxxxxxxxx>
Date: Tue, 1 Nov 2022 02:19:04 -0700
Cc: Jason Gunthorpe <jgg@xxxxxxxxxx>, Alexander Gordeev <agordeev@xxxxxxxxxxxxx>, David Airlie <airlied@xxxxxxxxx>, Tony Krowiak <akrowiak@xxxxxxxxxxxxx>, Alex Williamson <alex.williamson@xxxxxxxxxx>, Christian Borntraeger <borntraeger@xxxxxxxxxxxxx>, Cornelia Huck <cohuck@xxxxxxxxxx>, Daniel Vetter <daniel@xxxxxxxx>, Diana Craciun <diana.craciun@xxxxxxxxxxx>, "dri-devel@xxxxxxxxxxxxxxxxxxxxx" <dri-devel@xxxxxxxxxxxxxxxxxxxxx>, Eric Auger <eric.auger@xxxxxxxxxx>, "Eric Farman" <farman@xxxxxxxxxxxxx>, Harald Freudenberger <freude@xxxxxxxxxxxxx>, Vasily Gorbik <gor@xxxxxxxxxxxxx>, Heiko Carstens <hca@xxxxxxxxxxxxx>, "intel-gfx@xxxxxxxxxxxxxxxxxxxxx" <intel-gfx@xxxxxxxxxxxxxxxxxxxxx>, "intel-gvt-dev@xxxxxxxxxxxxxxxxxxxxx" <intel-gvt-dev@xxxxxxxxxxxxxxxxxxxxx>, "iommu@xxxxxxxxxxxxxxx" <iommu@xxxxxxxxxxxxxxx>, Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx>, Jason Herne <jjherne@xxxxxxxxxxxxx>, "Joonas Lahtinen" <joonas.lahtinen@xxxxxxxxxxxxxxx>, Joerg Roedel <joro@xxxxxxxxxx>, "kvm@xxxxxxxxxxxxxxx" <kvm@xxxxxxxxxxxxxxx>, "linux-s390@xxxxxxxxxxxxxxx" <linux-s390@xxxxxxxxxxxxxxx>, Longfang Liu <liulongfang@xxxxxxxxxx>, "Matthew Rosato" <mjrosato@xxxxxxxxxxxxx>, Peter Oberparleiter <oberpar@xxxxxxxxxxxxx>, Halil Pasic <pasic@xxxxxxxxxxxxx>, Robin Murphy <robin.murphy@xxxxxxx>, "Vivi, Rodrigo" <rodrigo.vivi@xxxxxxxxx>, Shameer Kolothum <shameerali.kolothum.thodi@xxxxxxxxxx>, Sven Schnelle <svens@xxxxxxxxxxxxx>, Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxxxxxxxx>, Vineeth Vijayan <vneethv@xxxxxxxxxxxxx>, Will Deacon <will@xxxxxxxxxx>, Yishai Hadas <yishaih@xxxxxxxxxx>, Zhenyu Wang <zhenyuw@xxxxxxxxxxxxxxx>, "Wang, Zhi A" <zhi.a.wang@xxxxxxxxx>, Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>, "Liu, Yi L" <yi.l.liu@xxxxxxxxx>
In-reply-to: <BN9PR11MB527655AB662598A9D5F9F1778C369@BN9PR11MB5276.namprd11.prod.outlook.com>
References: <0-v1-4991695894d8+211-vfio_iommufd_jgg@nvidia.com> <6-v1-4991695894d8+211-vfio_iommufd_jgg@nvidia.com> <BN9PR11MB527655AB662598A9D5F9F1778C369@BN9PR11MB5276.namprd11.prod.outlook.com>

On Tue, Nov 01, 2022 at 08:09:52AM +0000, Tian, Kevin wrote:

> > From: Jason Gunthorpe <jgg@xxxxxxxxxx>
> > Sent: Wednesday, October 26, 2022 2:51 AM
> >
> >  menuconfig VFIO
> >       tristate "VFIO Non-Privileged userspace driver framework"
> >       select IOMMU_API
> > +     depends on IOMMUFD || !IOMMUFD
> 
> Out of curiosity. What is the meaning of this dependency claim?

"is it a module or not" -- from https://lwn.net/Articles/683476/

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- Re: [PATCH 06/10] vfio-iommufd: Allow iommufd to be used in place of a container fd
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References:
- [PATCH 00/10] Connect VFIO to IOMMUFD
  - From: Jason Gunthorpe
- [PATCH 06/10] vfio-iommufd: Allow iommufd to be used in place of a container fd
  - From: Jason Gunthorpe
- RE: [PATCH 06/10] vfio-iommufd: Allow iommufd to be used in place of a container fd
  - From: Tian, Kevin

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