From: Jason Gunthorpe <jgg@nvidia.com>
To: Alex Williamson <alex.williamson@redhat.com>
Cc: Yi Liu <yi.l.liu@intel.com>,
joro@8bytes.org, kevin.tian@intel.com, robin.murphy@arm.com,
cohuck@redhat.com, eric.auger@redhat.com, nicolinc@nvidia.com,
kvm@vger.kernel.org, mjrosato@linux.ibm.com,
chao.p.peng@linux.intel.com, yi.y.sun@linux.intel.com,
peterx@redhat.com, jasowang@redhat.com,
shameerali.kolothum.thodi@huawei.com, lulu@redhat.com,
suravee.suthikulpanit@amd.com,
intel-gvt-dev@lists.freedesktop.org,
intel-gfx@lists.freedesktop.org, linux-s390@vger.kernel.org,
Timothy Pearson <tpearson@raptorengineering.com>,
Michael Ellerman <mpe@ellerman.id.au>
Subject: Re: [PATCH v3 05/15] kvm/vfio: Accept vfio device file from userspace
Date: Tue, 14 Feb 2023 20:17:46 -0400 [thread overview]
Message-ID: <Y+wkqnCAe42Ogcof@nvidia.com> (raw)
In-Reply-To: <20230214164235.64e2dccb.alex.williamson@redhat.com>
On Tue, Feb 14, 2023 at 04:42:35PM -0700, Alex Williamson wrote:
> A device file opened through a group could be passed through this
> interface though, right?
Yes, I think so
> Do we just chalk that up to user error? Maybe the SPAPR extension
> at least needs to be documented as relying on registering groups
> rather than devices.
The way these APIs work is you have to pass the same FD to all of
them. The SPAPR stuff is no different, if you used a cdev with
KVM_DEV_VFIO_GROUP_ADD then you have to use the same cdev fd with the
SPAPR group_fd. Yi just didn't rename it.
It is weird, but logically self consistent, I think.
> > I'm still thinking about proposing to just delete all this SPAPR
> > stuff. Power still hasn't had the patches applied to make it work
> > again so it seems to all be dead.
>
> There's been some off-list discussion about at least fixing SPAPR
> support, but yes, it either needs to get some love or we ought to think
> about its future. Thanks,
The patches exist, they just need to be applied AFAIK. If the people
responsible can't care enough about this to even do that then I find
it hard to care at all about the state of SPAPR.
Jason
next prev parent reply other threads:[~2023-02-15 0:17 UTC|newest]
Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-02-13 15:13 [PATCH v3 00/15] Add vfio_device cdev for iommufd support Yi Liu
2023-02-13 15:13 ` [PATCH v3 01/15] vfio: Allocate per device file structure Yi Liu
2023-02-13 15:13 ` [PATCH v3 02/15] vfio: Refine vfio file kAPIs Yi Liu
2023-02-13 15:13 ` [PATCH v3 03/15] vfio: Accept vfio device file in the driver facing kAPI Yi Liu
2023-02-13 23:21 ` Alex Williamson
2023-02-14 2:19 ` Liu, Yi L
2023-02-13 23:43 ` Jason Gunthorpe
2023-02-14 2:02 ` Liu, Yi L
2023-02-14 7:19 ` Liu, Yi L
2023-02-17 10:55 ` Liu, Yi L
2023-02-17 15:59 ` Jason Gunthorpe
2023-02-18 2:54 ` Liu, Yi L
2023-02-15 12:38 ` Jason Gunthorpe
2023-02-15 14:43 ` Liu, Yi L
2023-02-15 14:46 ` Jason Gunthorpe
2023-02-15 15:32 ` Alex Williamson
2023-02-15 17:04 ` Jason Gunthorpe
2023-02-15 17:19 ` Alex Williamson
2023-02-15 17:33 ` Jason Gunthorpe
2023-02-13 15:13 ` [PATCH v3 04/15] kvm/vfio: Rename kvm_vfio_group to prepare for accepting vfio device fd Yi Liu
2023-02-13 15:13 ` [PATCH v3 05/15] kvm/vfio: Accept vfio device file from userspace Yi Liu
2023-02-14 22:26 ` Alex Williamson
2023-02-14 23:25 ` Jason Gunthorpe
2023-02-14 23:42 ` Alex Williamson
2023-02-15 0:17 ` Jason Gunthorpe [this message]
2023-02-15 0:27 ` Timothy Pearson
2023-02-17 5:34 ` Liu, Yi L
2023-02-17 5:48 ` Liu, Yi L
2023-02-17 16:00 ` Jason Gunthorpe
2023-02-15 7:37 ` Liu, Yi L
2023-02-13 15:13 ` [PATCH v3 06/15] vfio: Pass struct vfio_device_file * to vfio_device_open/close() Yi Liu
2023-02-13 15:13 ` [PATCH v3 07/15] vfio: Block device access via device fd until device is opened Yi Liu
2023-02-14 22:46 ` Alex Williamson
2023-02-15 6:12 ` Liu, Yi L
2023-02-13 15:13 ` [PATCH v3 08/15] vfio: Add infrastructure for bind_iommufd from userspace Yi Liu
2023-02-13 15:13 ` [PATCH v3 09/15] vfio-iommufd: Add detach_ioas support for physical VFIO devices Yi Liu
2023-02-14 8:05 ` Tian, Kevin
2023-02-13 15:13 ` [PATCH v3 10/15] vfio-iommufd: Add detach_ioas for emulated " Yi Liu
2023-02-14 8:06 ` Tian, Kevin
2023-02-13 15:13 ` [PATCH v3 11/15] vfio: Add cdev_device_open_cnt to vfio_group Yi Liu
2023-02-14 8:18 ` Tian, Kevin
2023-02-13 15:13 ` [PATCH v3 12/15] vfio: Make vfio_device_open() single open for device cdev path Yi Liu
2023-02-14 8:25 ` Tian, Kevin
2023-02-13 15:13 ` [PATCH v3 13/15] vfio: Add cdev for vfio_device Yi Liu
2023-02-14 8:32 ` Tian, Kevin
2023-02-14 8:35 ` Liu, Yi L
2023-02-13 15:13 ` [PATCH v3 14/15] vfio: Add ioctls for device cdev using iommufd Yi Liu
2023-02-14 8:53 ` Tian, Kevin
2023-02-14 23:39 ` Yan Zhao
2023-02-15 2:04 ` Tian, Kevin
2023-02-15 7:37 ` Liu, Yi L
2023-02-16 8:24 ` Yan Zhao
2023-02-16 9:10 ` Liu, Yi L
2023-02-16 9:23 ` Yan Zhao
2023-02-16 10:28 ` Liu, Yi L
2023-02-16 14:24 ` Jason Gunthorpe
2023-02-13 15:13 ` [PATCH v3 15/15] vfio: Compile group optionally Yi Liu
2023-02-13 19:47 ` [PATCH v3 00/15] Add vfio_device cdev for iommufd support Alex Williamson
2023-02-13 23:21 ` Jason Gunthorpe
2023-02-14 15:15 ` Liu, Yi L
2023-02-14 15:54 ` Alex Williamson
2023-02-14 16:48 ` Jason Gunthorpe
2023-02-14 1:55 ` Liu, Yi L
2023-02-14 15:47 ` Alex Williamson
2023-02-15 7:54 ` Liu, Yi L
2023-02-15 20:09 ` Alex Williamson
2023-02-16 2:53 ` Liu, Yi L
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