From: "Tian, Kevin" <kevin.tian@intel.com> To: David Gibson <david@gibson.dropbear.id.au>, "Liu, Yi L" <yi.l.liu@intel.com> Cc: "alex.williamson@redhat.com" <alex.williamson@redhat.com>, "jgg@nvidia.com" <jgg@nvidia.com>, "hch@lst.de" <hch@lst.de>, "jasowang@redhat.com" <jasowang@redhat.com>, "joro@8bytes.org" <joro@8bytes.org>, "jean-philippe@linaro.org" <jean-philippe@linaro.org>, "parav@mellanox.com" <parav@mellanox.com>, "lkml@metux.net" <lkml@metux.net>, "pbonzini@redhat.com" <pbonzini@redhat.com>, "lushenming@huawei.com" <lushenming@huawei.com>, "eric.auger@redhat.com" <eric.auger@redhat.com>, "corbet@lwn.net" <corbet@lwn.net>, "Raj, Ashok" <ashok.raj@intel.com>, "yi.l.liu@linux.intel.com" <yi.l.liu@linux.intel.com>, "Tian, Jun J" <jun.j.tian@intel.com>, "Wu, Hao" <hao.wu@intel.com>, "Jiang, Dave" <dave.jiang@intel.com>, "jacob.jun.pan@linux.intel.com" <jacob.jun.pan@linux.intel.com>, "kwankhede@nvidia.com" <kwankhede@nvidia.com>, "robin.murphy@arm.com" <robin.murphy@arm.com>, "kvm@vger.kernel.org" <kvm@vger.kernel.org>, "iommu@lists.linux-foundation.org" <iommu@lists.linux-foundation.org>, "dwmw2@infradead.org" <dwmw2@infradead.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "baolu.lu@linux.intel.com" <baolu.lu@linux.intel.com>, "nicolinc@nvidia.com" <nicolinc@nvidia.com> Subject: RE: [RFC 03/20] vfio: Add vfio_[un]register_device() Date: Wed, 29 Sep 2021 03:40:11 +0000 [thread overview] Message-ID: <BN9PR11MB5433C0320604707451C11C538CA99@BN9PR11MB5433.namprd11.prod.outlook.com> (raw) In-Reply-To: <YVPS43bNjvzdxdiM@yekko> > From: David Gibson <david@gibson.dropbear.id.au> > Sent: Wednesday, September 29, 2021 10:44 AM > > > > > One open about how to organize the device nodes under > /dev/vfio/devices/. > > This RFC adopts a simple policy by keeping a flat layout with mixed > devname > > from all kinds of devices. The prerequisite of this model is that devnames > > from different bus types are unique formats: > > > > /dev/vfio/devices/0000:00:14.2 (pci) > > /dev/vfio/devices/PNP0103:00 (platform) > > /dev/vfio/devices/83b8f4f2-509f-382f-3c1e-e6bfe0fa1001 (mdev) > > Oof. I really don't think this is a good idea. Ensuring that a > format is "unique" in the sense that it can't collide with any of the > other formats, for *every* value of the parameters on both sides is > actually pretty complicated in general. > > I think per-type sub-directories would be helpful here, Jason's > suggestion of just sequential numbers would work as well. we'll follow Jason's suggestion in next version. > > + /* > > + * Refcounting can't start until the driver call register. Don’t > > + * start twice when the device is exposed in both group and > nongroup > > + * interfaces. > > + */ > > + if (!refcount_read(&device->refcount)) > > Is there a possible race here with something getting in and > incrementing the refcount between the read and set? this will not be required in next version, which will always create both group and nongroup interfaces for every device (then let driver providing .bind_iommufd() callback for whether nongroup interface is functional). It will be centrally processed within existing vfio_[un]register_group_dev(), thus above race is not a concern any more. > > > + refcount_set(&device->refcount, 1); > > > > mutex_lock(&group->device_lock); > > list_add(&device->group_next, &group->device_list); > > @@ -804,7 +810,78 @@ int vfio_register_group_dev(struct vfio_device > *device) > > > > return 0; > > } > > -EXPORT_SYMBOL_GPL(vfio_register_group_dev); > > + > > +static int __vfio_register_nongroup_dev(struct vfio_device *device) > > +{ > > + struct vfio_device *existing_device; > > + struct device *dev; > > + int ret = 0, minor; > > + > > + mutex_lock(&vfio.device_lock); > > + list_for_each_entry(existing_device, &vfio.device_list, vfio_next) { > > + if (existing_device == device) { > > + ret = -EBUSY; > > + goto out_unlock; > > This indicates a bug in the caller, doesn't it? Should it be a BUG or > WARN instead? this call is initiated by userspace. Per Jason's suggestion we don't even need to check it then no lock is required. Thanks Kevin
WARNING: multiple messages have this Message-ID (diff)
From: "Tian, Kevin" <kevin.tian@intel.com> To: David Gibson <david@gibson.dropbear.id.au>, "Liu, Yi L" <yi.l.liu@intel.com> Cc: "kvm@vger.kernel.org" <kvm@vger.kernel.org>, "jasowang@redhat.com" <jasowang@redhat.com>, "kwankhede@nvidia.com" <kwankhede@nvidia.com>, "hch@lst.de" <hch@lst.de>, "jean-philippe@linaro.org" <jean-philippe@linaro.org>, "Jiang, Dave" <dave.jiang@intel.com>, "Raj, Ashok" <ashok.raj@intel.com>, "corbet@lwn.net" <corbet@lwn.net>, "jgg@nvidia.com" <jgg@nvidia.com>, "parav@mellanox.com" <parav@mellanox.com>, "alex.williamson@redhat.com" <alex.williamson@redhat.com>, "lkml@metux.net" <lkml@metux.net>, "dwmw2@infradead.org" <dwmw2@infradead.org>, "Tian, Jun J" <jun.j.tian@intel.com>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "lushenming@huawei.com" <lushenming@huawei.com>, "iommu@lists.linux-foundation.org" <iommu@lists.linux-foundation.org>, "pbonzini@redhat.com" <pbonzini@redhat.com>, "robin.murphy@arm.com" <robin.murphy@arm.com> Subject: RE: [RFC 03/20] vfio: Add vfio_[un]register_device() Date: Wed, 29 Sep 2021 03:40:11 +0000 [thread overview] Message-ID: <BN9PR11MB5433C0320604707451C11C538CA99@BN9PR11MB5433.namprd11.prod.outlook.com> (raw) In-Reply-To: <YVPS43bNjvzdxdiM@yekko> > From: David Gibson <david@gibson.dropbear.id.au> > Sent: Wednesday, September 29, 2021 10:44 AM > > > > > One open about how to organize the device nodes under > /dev/vfio/devices/. > > This RFC adopts a simple policy by keeping a flat layout with mixed > devname > > from all kinds of devices. The prerequisite of this model is that devnames > > from different bus types are unique formats: > > > > /dev/vfio/devices/0000:00:14.2 (pci) > > /dev/vfio/devices/PNP0103:00 (platform) > > /dev/vfio/devices/83b8f4f2-509f-382f-3c1e-e6bfe0fa1001 (mdev) > > Oof. I really don't think this is a good idea. Ensuring that a > format is "unique" in the sense that it can't collide with any of the > other formats, for *every* value of the parameters on both sides is > actually pretty complicated in general. > > I think per-type sub-directories would be helpful here, Jason's > suggestion of just sequential numbers would work as well. we'll follow Jason's suggestion in next version. > > + /* > > + * Refcounting can't start until the driver call register. Don’t > > + * start twice when the device is exposed in both group and > nongroup > > + * interfaces. > > + */ > > + if (!refcount_read(&device->refcount)) > > Is there a possible race here with something getting in and > incrementing the refcount between the read and set? this will not be required in next version, which will always create both group and nongroup interfaces for every device (then let driver providing .bind_iommufd() callback for whether nongroup interface is functional). It will be centrally processed within existing vfio_[un]register_group_dev(), thus above race is not a concern any more. > > > + refcount_set(&device->refcount, 1); > > > > mutex_lock(&group->device_lock); > > list_add(&device->group_next, &group->device_list); > > @@ -804,7 +810,78 @@ int vfio_register_group_dev(struct vfio_device > *device) > > > > return 0; > > } > > -EXPORT_SYMBOL_GPL(vfio_register_group_dev); > > + > > +static int __vfio_register_nongroup_dev(struct vfio_device *device) > > +{ > > + struct vfio_device *existing_device; > > + struct device *dev; > > + int ret = 0, minor; > > + > > + mutex_lock(&vfio.device_lock); > > + list_for_each_entry(existing_device, &vfio.device_list, vfio_next) { > > + if (existing_device == device) { > > + ret = -EBUSY; > > + goto out_unlock; > > This indicates a bug in the caller, doesn't it? Should it be a BUG or > WARN instead? this call is initiated by userspace. Per Jason's suggestion we don't even need to check it then no lock is required. Thanks Kevin _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
next prev parent reply other threads:[~2021-09-29 3:40 UTC|newest] Thread overview: 537+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-09-19 6:38 [RFC 00/20] Introduce /dev/iommu for userspace I/O address space management Liu Yi L 2021-09-19 6:38 ` Liu Yi L 2021-09-19 6:38 ` [RFC 01/20] iommu/iommufd: Add /dev/iommu core Liu Yi L 2021-09-19 6:38 ` Liu Yi L 2021-09-21 15:41 ` Jason Gunthorpe 2021-09-21 15:41 ` Jason Gunthorpe via iommu 2021-09-22 1:51 ` Tian, Kevin 2021-09-22 1:51 ` Tian, Kevin 2021-09-22 12:40 ` Jason Gunthorpe 2021-09-22 12:40 ` Jason Gunthorpe via iommu 2021-09-22 13:59 ` Tian, Kevin 2021-09-22 13:59 ` Tian, Kevin 2021-09-22 14:10 ` Jason Gunthorpe 2021-09-22 14:10 ` Jason Gunthorpe via iommu 2021-10-15 9:18 ` Liu, Yi L 2021-10-15 9:18 ` Liu, Yi L 2021-10-15 11:18 ` Jason Gunthorpe 2021-10-15 11:18 ` Jason Gunthorpe via iommu 2021-10-15 11:29 ` Liu, Yi L 2021-10-15 11:29 ` Liu, Yi L 2021-10-19 16:57 ` Jacob Pan 2021-10-19 16:57 ` Jacob Pan 2021-10-19 16:57 ` Jason Gunthorpe 2021-10-19 16:57 ` Jason Gunthorpe via iommu 2021-10-19 17:11 ` Jacob Pan 2021-10-19 17:11 ` Jacob Pan 2021-10-19 17:12 ` Jason Gunthorpe 2021-10-19 17:12 ` Jason Gunthorpe via iommu 2021-09-19 6:38 ` [RFC 02/20] vfio: Add device class for /dev/vfio/devices Liu Yi L 2021-09-19 6:38 ` Liu Yi L 2021-09-21 15:57 ` Jason Gunthorpe 2021-09-21 15:57 ` Jason Gunthorpe via iommu 2021-09-21 23:56 ` Tian, Kevin 2021-09-21 23:56 ` Tian, Kevin 2021-09-22 0:55 ` Jason Gunthorpe 2021-09-22 0:55 ` Jason Gunthorpe via iommu 2021-09-22 1:07 ` Tian, Kevin 2021-09-22 1:07 ` Tian, Kevin 2021-09-22 12:31 ` Jason Gunthorpe 2021-09-22 12:31 ` Jason Gunthorpe via iommu 2021-09-22 3:22 ` Tian, Kevin 2021-09-22 3:22 ` Tian, Kevin 2021-09-22 12:50 ` Jason Gunthorpe 2021-09-22 12:50 ` Jason Gunthorpe via iommu 2021-09-22 14:09 ` Tian, Kevin 2021-09-22 14:09 ` Tian, Kevin 2021-09-21 19:56 ` Alex Williamson 2021-09-21 19:56 ` Alex Williamson 2021-09-22 0:56 ` Tian, Kevin 2021-09-22 0:56 ` Tian, Kevin 2021-09-29 2:08 ` David Gibson 2021-09-29 2:08 ` David Gibson 2021-09-29 19:05 ` Alex Williamson 2021-09-29 19:05 ` Alex Williamson 2021-09-30 2:43 ` David Gibson 2021-09-30 2:43 ` David Gibson 2021-10-20 12:39 ` Liu, Yi L 2021-10-20 12:39 ` Liu, Yi L 2021-09-19 6:38 ` [RFC 03/20] vfio: Add vfio_[un]register_device() Liu Yi L 2021-09-19 6:38 ` Liu Yi L 2021-09-21 16:01 ` Jason Gunthorpe 2021-09-21 16:01 ` Jason Gunthorpe via iommu 2021-09-21 23:10 ` Tian, Kevin 2021-09-21 23:10 ` Tian, Kevin 2021-09-22 0:53 ` Jason Gunthorpe 2021-09-22 0:53 ` Jason Gunthorpe via iommu 2021-09-22 0:59 ` Tian, Kevin 2021-09-22 0:59 ` Tian, Kevin 2021-09-22 9:23 ` Tian, Kevin 2021-09-22 9:23 ` Tian, Kevin 2021-09-22 12:22 ` Jason Gunthorpe 2021-09-22 12:22 ` Jason Gunthorpe via iommu 2021-09-22 13:44 ` Tian, Kevin 2021-09-22 13:44 ` Tian, Kevin 2021-09-22 20:10 ` Alex Williamson 2021-09-22 20:10 ` Alex Williamson 2021-09-22 22:34 ` Tian, Kevin 2021-09-22 22:34 ` Tian, Kevin 2021-09-22 22:45 ` Alex Williamson 2021-09-22 22:45 ` Alex Williamson 2021-09-22 23:45 ` Tian, Kevin 2021-09-22 23:45 ` Tian, Kevin 2021-09-22 23:52 ` Jason Gunthorpe 2021-09-22 23:52 ` Jason Gunthorpe via iommu 2021-09-23 0:38 ` Tian, Kevin 2021-09-23 0:38 ` Tian, Kevin 2021-09-22 23:56 ` Jason Gunthorpe 2021-09-22 23:56 ` Jason Gunthorpe via iommu 2021-09-22 0:54 ` Tian, Kevin 2021-09-22 0:54 ` Tian, Kevin 2021-09-22 1:00 ` Jason Gunthorpe 2021-09-22 1:00 ` Jason Gunthorpe via iommu 2021-09-22 1:02 ` Tian, Kevin 2021-09-22 1:02 ` Tian, Kevin 2021-09-23 7:25 ` Eric Auger 2021-09-23 7:25 ` Eric Auger 2021-09-23 11:44 ` Jason Gunthorpe 2021-09-23 11:44 ` Jason Gunthorpe via iommu 2021-09-29 2:46 ` david 2021-09-29 2:46 ` david 2021-09-29 12:22 ` Jason Gunthorpe 2021-09-29 12:22 ` Jason Gunthorpe via iommu 2021-09-30 2:48 ` david 2021-09-30 2:48 ` david 2021-09-29 2:43 ` David Gibson 2021-09-29 2:43 ` David Gibson 2021-09-29 3:40 ` Tian, Kevin [this message] 2021-09-29 3:40 ` Tian, Kevin 2021-09-29 5:30 ` Tian, Kevin 2021-09-29 5:30 ` Tian, Kevin 2021-09-29 7:08 ` Cornelia Huck 2021-09-29 7:08 ` Cornelia Huck 2021-09-29 12:15 ` Jason Gunthorpe via iommu 2021-09-29 12:15 ` Jason Gunthorpe 2021-09-19 6:38 ` [RFC 04/20] iommu: Add iommu_device_get_info interface Liu Yi L 2021-09-19 6:38 ` Liu Yi L 2021-09-21 16:19 ` Jason Gunthorpe 2021-09-21 16:19 ` Jason Gunthorpe via iommu 2021-09-22 2:31 ` Lu Baolu 2021-09-22 2:31 ` Lu Baolu 2021-09-22 5:07 ` Christoph Hellwig 2021-09-22 5:07 ` Christoph Hellwig 2021-09-29 2:52 ` David Gibson 2021-09-29 2:52 ` David Gibson 2021-09-29 9:25 ` Lu Baolu 2021-09-29 9:25 ` Lu Baolu 2021-09-29 9:29 ` Lu Baolu 2021-09-29 9:29 ` Lu Baolu 2021-09-19 6:38 ` [RFC 05/20] vfio/pci: Register device to /dev/vfio/devices Liu Yi L 2021-09-19 6:38 ` Liu Yi L 2021-09-21 16:40 ` Jason Gunthorpe 2021-09-21 16:40 ` Jason Gunthorpe via iommu 2021-09-21 21:09 ` Alex Williamson 2021-09-21 21:09 ` Alex Williamson 2021-09-21 21:58 ` Jason Gunthorpe 2021-09-21 21:58 ` Jason Gunthorpe via iommu 2021-09-22 1:24 ` Tian, Kevin 2021-09-22 1:24 ` Tian, Kevin 2021-09-22 1:19 ` Tian, Kevin 2021-09-22 1:19 ` Tian, Kevin 2021-09-22 21:17 ` Alex Williamson 2021-09-22 21:17 ` Alex Williamson 2021-09-22 23:49 ` Tian, Kevin 2021-09-22 23:49 ` Tian, Kevin 2021-09-19 6:38 ` [RFC 06/20] iommu: Add iommu_device_init[exit]_user_dma interfaces Liu Yi L 2021-09-19 6:38 ` Liu Yi L 2021-09-21 17:09 ` Jason Gunthorpe 2021-09-21 17:09 ` Jason Gunthorpe via iommu 2021-09-22 1:47 ` Tian, Kevin 2021-09-22 1:47 ` Tian, Kevin 2021-09-22 12:39 ` Jason Gunthorpe 2021-09-22 12:39 ` Jason Gunthorpe via iommu 2021-09-22 13:56 ` Tian, Kevin 2021-09-22 13:56 ` Tian, Kevin 2021-09-27 9:42 ` Tian, Kevin 2021-09-27 9:42 ` Tian, Kevin 2021-09-27 11:34 ` Lu Baolu 2021-09-27 11:34 ` Lu Baolu 2021-09-27 13:08 ` Tian, Kevin 2021-09-27 13:08 ` Tian, Kevin 2021-09-27 11:53 ` Jason Gunthorpe 2021-09-27 11:53 ` Jason Gunthorpe via iommu 2021-09-27 13:00 ` Tian, Kevin 2021-09-27 13:00 ` Tian, Kevin 2021-09-27 13:09 ` Jason Gunthorpe 2021-09-27 13:09 ` Jason Gunthorpe via iommu 2021-09-27 13:32 ` Tian, Kevin 2021-09-27 14:39 ` Jason Gunthorpe 2021-09-28 7:13 ` Tian, Kevin 2021-09-28 11:54 ` Jason Gunthorpe 2021-09-28 23:59 ` Tian, Kevin 2021-09-27 19:19 ` Alex Williamson 2021-09-28 7:43 ` Tian, Kevin 2021-09-28 16:26 ` Alex Williamson 2021-09-27 15:09 ` Jason Gunthorpe 2021-09-27 15:09 ` Jason Gunthorpe via iommu 2021-09-28 7:30 ` Tian, Kevin 2021-09-28 7:30 ` Tian, Kevin 2021-09-28 11:57 ` Jason Gunthorpe 2021-09-28 11:57 ` Jason Gunthorpe via iommu 2021-09-28 13:35 ` Lu Baolu 2021-09-28 13:35 ` Lu Baolu 2021-09-28 14:07 ` Jason Gunthorpe 2021-09-28 14:07 ` Jason Gunthorpe via iommu 2021-09-29 0:38 ` Tian, Kevin 2021-09-29 0:38 ` Tian, Kevin 2021-09-29 12:59 ` Jason Gunthorpe 2021-09-29 12:59 ` Jason Gunthorpe via iommu 2021-10-15 1:29 ` Tian, Kevin 2021-10-15 1:29 ` Tian, Kevin 2021-10-15 11:09 ` Jason Gunthorpe 2021-10-15 11:09 ` Jason Gunthorpe via iommu 2021-10-18 1:52 ` Tian, Kevin 2021-10-18 1:52 ` Tian, Kevin 2021-09-29 2:22 ` Lu Baolu 2021-09-29 2:22 ` Lu Baolu 2021-09-29 2:29 ` Tian, Kevin 2021-09-29 2:29 ` Tian, Kevin 2021-09-29 2:38 ` Lu Baolu 2021-09-29 2:38 ` Lu Baolu 2021-09-29 4:55 ` David Gibson 2021-09-29 4:55 ` David Gibson 2021-09-29 5:38 ` Tian, Kevin 2021-09-29 5:38 ` Tian, Kevin 2021-09-29 6:35 ` David Gibson 2021-09-29 6:35 ` David Gibson 2021-09-29 7:31 ` Tian, Kevin 2021-09-29 7:31 ` Tian, Kevin 2021-09-30 3:05 ` David Gibson 2021-09-30 3:05 ` David Gibson 2021-09-29 12:57 ` Jason Gunthorpe 2021-09-29 12:57 ` Jason Gunthorpe via iommu 2021-09-30 3:09 ` David Gibson 2021-09-30 3:09 ` David Gibson 2021-09-30 22:28 ` Jason Gunthorpe 2021-09-30 22:28 ` Jason Gunthorpe via iommu 2021-10-01 3:54 ` David Gibson 2021-10-01 3:54 ` David Gibson 2021-09-19 6:38 ` [RFC 07/20] iommu/iommufd: Add iommufd_[un]bind_device() Liu Yi L 2021-09-19 6:38 ` Liu Yi L 2021-09-21 17:14 ` Jason Gunthorpe 2021-09-21 17:14 ` Jason Gunthorpe via iommu 2021-10-15 9:21 ` Liu, Yi L 2021-10-15 9:21 ` Liu, Yi L 2021-09-29 5:25 ` David Gibson 2021-09-29 5:25 ` David Gibson 2021-09-29 12:24 ` Jason Gunthorpe 2021-09-29 12:24 ` Jason Gunthorpe via iommu 2021-09-30 3:10 ` David Gibson 2021-09-30 3:10 ` David Gibson 2021-10-01 12:43 ` Jason Gunthorpe 2021-10-01 12:43 ` Jason Gunthorpe via iommu 2021-10-07 1:23 ` David Gibson 2021-10-07 1:23 ` David Gibson 2021-10-07 11:35 ` Jason Gunthorpe 2021-10-07 11:35 ` Jason Gunthorpe via iommu 2021-10-11 3:24 ` David Gibson 2021-10-11 3:24 ` David Gibson 2021-09-19 6:38 ` [RFC 08/20] vfio/pci: Add VFIO_DEVICE_BIND_IOMMUFD Liu Yi L 2021-09-19 6:38 ` Liu Yi L 2021-09-19 10:08 ` kernel test robot 2021-09-19 10:08 ` kernel test robot 2021-09-21 17:29 ` Jason Gunthorpe 2021-09-21 17:29 ` Jason Gunthorpe via iommu 2021-09-22 21:01 ` Alex Williamson 2021-09-22 21:01 ` Alex Williamson 2021-09-22 23:01 ` Jason Gunthorpe 2021-09-22 23:01 ` Jason Gunthorpe via iommu 2021-09-29 6:00 ` David Gibson 2021-09-29 6:00 ` David Gibson 2021-09-29 6:41 ` Tian, Kevin 2021-09-29 6:41 ` Tian, Kevin 2021-09-29 12:28 ` Jason Gunthorpe 2021-09-29 12:28 ` Jason Gunthorpe via iommu 2021-09-29 22:34 ` Tian, Kevin 2021-09-29 22:34 ` Tian, Kevin 2021-09-30 3:12 ` David Gibson 2021-09-30 3:12 ` David Gibson 2021-09-19 6:38 ` [RFC 09/20] iommu: Add page size and address width attributes Liu Yi L 2021-09-19 6:38 ` Liu Yi L 2021-09-22 13:42 ` Eric Auger 2021-09-22 13:42 ` Eric Auger 2021-09-22 14:19 ` Tian, Kevin 2021-09-22 14:19 ` Tian, Kevin 2021-09-19 6:38 ` [RFC 10/20] iommu/iommufd: Add IOMMU_DEVICE_GET_INFO Liu Yi L 2021-09-19 6:38 ` Liu Yi L 2021-09-21 17:40 ` Jason Gunthorpe 2021-09-21 17:40 ` Jason Gunthorpe via iommu 2021-09-22 3:30 ` Tian, Kevin 2021-09-22 3:30 ` Tian, Kevin 2021-09-22 12:41 ` Jason Gunthorpe 2021-09-22 12:41 ` Jason Gunthorpe via iommu 2021-09-29 6:18 ` david 2021-09-29 6:18 ` david 2021-09-22 21:24 ` Alex Williamson 2021-09-22 21:24 ` Alex Williamson 2021-09-22 23:49 ` Jason Gunthorpe 2021-09-22 23:49 ` Jason Gunthorpe via iommu 2021-09-23 3:10 ` Tian, Kevin 2021-09-23 3:10 ` Tian, Kevin 2021-09-23 10:15 ` Jean-Philippe Brucker 2021-09-23 10:15 ` Jean-Philippe Brucker 2021-09-23 11:27 ` Jason Gunthorpe 2021-09-23 11:27 ` Jason Gunthorpe via iommu 2021-09-23 12:05 ` Tian, Kevin 2021-09-23 12:05 ` Tian, Kevin 2021-09-23 12:22 ` Jason Gunthorpe 2021-09-23 12:22 ` Jason Gunthorpe via iommu 2021-09-29 8:48 ` Tian, Kevin 2021-09-29 8:48 ` Tian, Kevin 2021-09-29 12:36 ` Jason Gunthorpe 2021-09-29 12:36 ` Jason Gunthorpe via iommu 2021-09-30 8:30 ` Tian, Kevin 2021-09-30 10:33 ` Jean-Philippe Brucker 2021-09-30 22:04 ` Jason Gunthorpe 2021-10-01 3:28 ` hch 2021-10-14 8:13 ` Tian, Kevin 2021-10-14 8:22 ` hch 2021-10-14 8:29 ` Tian, Kevin 2021-10-14 8:01 ` Tian, Kevin 2021-10-14 9:16 ` Jean-Philippe Brucker 2021-09-30 8:49 ` Tian, Kevin 2021-09-30 8:49 ` Tian, Kevin 2021-09-30 13:43 ` Lu Baolu 2021-09-30 13:43 ` Lu Baolu 2021-10-01 3:24 ` hch 2021-10-01 3:24 ` hch 2021-09-30 22:08 ` Jason Gunthorpe 2021-09-30 22:08 ` Jason Gunthorpe via iommu 2021-09-23 11:36 ` Jason Gunthorpe 2021-09-23 11:36 ` Jason Gunthorpe via iommu [not found] ` <BN9PR11MB5433409DF766AAEF1BB2CF258CA39@BN9PR11MB5433.namprd11.prod.outlook.com> 2021-09-23 3:38 ` Tian, Kevin 2021-09-23 3:38 ` Tian, Kevin 2021-09-23 11:42 ` Jason Gunthorpe 2021-09-23 11:42 ` Jason Gunthorpe via iommu 2021-09-30 9:35 ` Tian, Kevin 2021-09-30 9:35 ` Tian, Kevin 2021-09-30 22:23 ` Jason Gunthorpe 2021-09-30 22:23 ` Jason Gunthorpe via iommu 2021-10-01 3:30 ` hch 2021-10-01 3:30 ` hch 2021-10-14 9:11 ` Tian, Kevin 2021-10-14 9:11 ` Tian, Kevin 2021-10-14 15:42 ` Jason Gunthorpe 2021-10-14 15:42 ` Jason Gunthorpe via iommu 2021-10-15 1:01 ` Tian, Kevin 2021-10-15 1:01 ` Tian, Kevin [not found] ` <BN9PR11MB543327BB6D58AEF91AD2C9D18CB99@BN9PR11MB5433.namprd11.prod.outlook.com> 2021-10-21 2:26 ` Tian, Kevin 2021-10-21 2:26 ` Tian, Kevin 2021-10-21 14:58 ` Jean-Philippe Brucker 2021-10-21 14:58 ` Jean-Philippe Brucker 2021-10-21 23:22 ` Jason Gunthorpe 2021-10-21 23:22 ` Jason Gunthorpe via iommu 2021-10-22 7:49 ` Jean-Philippe Brucker 2021-10-22 7:49 ` Jean-Philippe Brucker 2021-10-25 16:51 ` Jason Gunthorpe 2021-10-25 16:51 ` Jason Gunthorpe via iommu 2021-10-21 23:30 ` Jason Gunthorpe 2021-10-21 23:30 ` Jason Gunthorpe via iommu 2021-10-22 3:08 ` Tian, Kevin 2021-10-22 3:08 ` Tian, Kevin 2021-10-25 23:34 ` Jason Gunthorpe 2021-10-25 23:34 ` Jason Gunthorpe via iommu 2021-10-27 1:42 ` Tian, Kevin 2021-10-27 1:42 ` Tian, Kevin 2021-10-28 2:07 ` Tian, Kevin 2021-10-28 2:07 ` Tian, Kevin 2021-10-29 13:55 ` Jason Gunthorpe 2021-10-29 13:55 ` Jason Gunthorpe via iommu 2021-09-29 6:23 ` David Gibson 2021-09-29 6:23 ` David Gibson 2021-09-19 6:38 ` [RFC 11/20] iommu/iommufd: Add IOMMU_IOASID_ALLOC/FREE Liu Yi L 2021-09-19 6:38 ` Liu Yi L 2021-09-19 11:03 ` kernel test robot 2021-09-19 11:03 ` kernel test robot 2021-09-21 17:44 ` Jason Gunthorpe 2021-09-21 17:44 ` Jason Gunthorpe via iommu 2021-09-22 3:40 ` Tian, Kevin 2021-09-22 3:40 ` Tian, Kevin 2021-09-22 14:09 ` Jason Gunthorpe 2021-09-22 14:09 ` Jason Gunthorpe via iommu 2021-09-23 9:14 ` Tian, Kevin 2021-09-23 9:14 ` Tian, Kevin 2021-09-23 12:06 ` Jason Gunthorpe 2021-09-23 12:06 ` Jason Gunthorpe via iommu 2021-09-23 12:22 ` Tian, Kevin 2021-09-23 12:22 ` Tian, Kevin 2021-09-23 12:31 ` Jason Gunthorpe 2021-09-23 12:31 ` Jason Gunthorpe via iommu 2021-09-23 12:45 ` Tian, Kevin 2021-09-23 12:45 ` Tian, Kevin 2021-09-23 13:01 ` Jason Gunthorpe 2021-09-23 13:01 ` Jason Gunthorpe via iommu 2021-09-23 13:20 ` Tian, Kevin 2021-09-23 13:20 ` Tian, Kevin 2021-09-23 13:30 ` Jason Gunthorpe 2021-09-23 13:30 ` Jason Gunthorpe via iommu 2021-09-23 13:41 ` Tian, Kevin 2021-09-23 13:41 ` Tian, Kevin 2021-10-01 6:30 ` david 2021-10-01 6:30 ` david 2021-10-01 6:26 ` david 2021-10-01 6:26 ` david 2021-10-01 6:19 ` david 2021-10-01 6:19 ` david 2021-10-01 12:25 ` Jason Gunthorpe 2021-10-01 12:25 ` Jason Gunthorpe via iommu 2021-10-02 4:21 ` david 2021-10-02 4:21 ` david 2021-10-02 12:25 ` Jason Gunthorpe 2021-10-02 12:25 ` Jason Gunthorpe via iommu 2021-10-11 5:37 ` david 2021-10-11 5:37 ` david 2021-10-11 17:17 ` Jason Gunthorpe 2021-10-11 17:17 ` Jason Gunthorpe via iommu 2021-10-14 4:33 ` david 2021-10-14 4:33 ` david 2021-10-14 15:06 ` Jason Gunthorpe via iommu 2021-10-14 15:06 ` Jason Gunthorpe 2021-10-18 3:40 ` david 2021-10-18 3:40 ` david 2021-10-01 6:15 ` david 2021-10-01 6:15 ` david 2021-09-22 12:51 ` Liu, Yi L 2021-09-22 12:51 ` Liu, Yi L 2021-09-22 13:32 ` Jason Gunthorpe 2021-09-22 13:32 ` Jason Gunthorpe via iommu 2021-09-23 6:26 ` Liu, Yi L 2021-09-23 6:26 ` Liu, Yi L 2021-10-01 6:13 ` David Gibson 2021-10-01 6:13 ` David Gibson 2021-10-01 12:22 ` Jason Gunthorpe 2021-10-01 12:22 ` Jason Gunthorpe via iommu 2021-10-11 6:02 ` David Gibson 2021-10-11 6:02 ` David Gibson 2021-10-11 8:49 ` Jean-Philippe Brucker 2021-10-11 8:49 ` Jean-Philippe Brucker 2021-10-11 23:38 ` Jason Gunthorpe 2021-10-11 23:38 ` Jason Gunthorpe via iommu 2021-10-12 8:33 ` Jean-Philippe Brucker 2021-10-12 8:33 ` Jean-Philippe Brucker 2021-10-13 7:14 ` Tian, Kevin 2021-10-13 7:14 ` Tian, Kevin 2021-10-13 7:07 ` Tian, Kevin 2021-10-13 7:07 ` Tian, Kevin 2021-10-14 4:38 ` David Gibson 2021-10-14 4:38 ` David Gibson 2021-10-11 18:49 ` Jason Gunthorpe 2021-10-11 18:49 ` Jason Gunthorpe via iommu 2021-10-14 4:53 ` David Gibson 2021-10-14 4:53 ` David Gibson 2021-10-14 14:52 ` Jason Gunthorpe 2021-10-14 14:52 ` Jason Gunthorpe via iommu 2021-10-18 3:50 ` David Gibson 2021-10-18 3:50 ` David Gibson 2021-10-18 17:42 ` Jason Gunthorpe 2021-10-18 17:42 ` Jason Gunthorpe via iommu 2021-09-22 13:45 ` Jean-Philippe Brucker 2021-09-22 13:45 ` Jean-Philippe Brucker 2021-09-29 10:47 ` Liu, Yi L 2021-09-29 10:47 ` Liu, Yi L 2021-10-01 6:11 ` David Gibson 2021-10-01 6:11 ` David Gibson 2021-10-13 7:00 ` Tian, Kevin 2021-10-13 7:00 ` Tian, Kevin 2021-10-14 5:00 ` David Gibson 2021-10-14 5:00 ` David Gibson 2021-10-14 6:53 ` Tian, Kevin 2021-10-14 6:53 ` Tian, Kevin 2021-10-25 5:05 ` David Gibson 2021-10-25 5:05 ` David Gibson 2021-10-27 2:32 ` Tian, Kevin 2021-10-27 2:32 ` Tian, Kevin 2021-09-19 6:38 ` [RFC 12/20] iommu/iommufd: Add IOMMU_CHECK_EXTENSION Liu Yi L 2021-09-19 6:38 ` Liu Yi L 2021-09-21 17:47 ` Jason Gunthorpe 2021-09-21 17:47 ` Jason Gunthorpe via iommu 2021-09-22 3:41 ` Tian, Kevin 2021-09-22 3:41 ` Tian, Kevin 2021-09-22 12:55 ` Jason Gunthorpe 2021-09-22 12:55 ` Jason Gunthorpe via iommu 2021-09-22 14:13 ` Tian, Kevin 2021-09-19 6:38 ` [RFC 13/20] iommu: Extend iommu_at[de]tach_device() for multiple devices group Liu Yi L 2021-09-19 6:38 ` Liu Yi L 2021-10-14 5:24 ` David Gibson 2021-10-14 5:24 ` David Gibson 2021-10-14 7:06 ` Tian, Kevin 2021-10-14 7:06 ` Tian, Kevin 2021-10-18 3:57 ` David Gibson 2021-10-18 3:57 ` David Gibson 2021-10-18 16:32 ` Jason Gunthorpe 2021-10-18 16:32 ` Jason Gunthorpe via iommu 2021-10-25 5:14 ` David Gibson 2021-10-25 5:14 ` David Gibson 2021-10-25 12:14 ` Jason Gunthorpe 2021-10-25 12:14 ` Jason Gunthorpe via iommu 2021-10-25 13:16 ` David Gibson 2021-10-25 13:16 ` David Gibson 2021-10-25 23:36 ` Jason Gunthorpe 2021-10-25 23:36 ` Jason Gunthorpe via iommu 2021-10-26 9:23 ` David Gibson 2021-10-26 9:23 ` David Gibson 2021-09-19 6:38 ` [RFC 14/20] iommu/iommufd: Add iommufd_device_[de]attach_ioasid() Liu Yi L 2021-09-19 6:38 ` Liu Yi L 2021-09-21 18:02 ` Jason Gunthorpe 2021-09-21 18:02 ` Jason Gunthorpe via iommu 2021-09-22 3:53 ` Tian, Kevin 2021-09-22 3:53 ` Tian, Kevin 2021-09-22 12:57 ` Jason Gunthorpe 2021-09-22 12:57 ` Jason Gunthorpe via iommu 2021-09-22 14:16 ` Tian, Kevin 2021-09-22 14:16 ` Tian, Kevin 2021-09-19 6:38 ` [RFC 15/20] vfio/pci: Add VFIO_DEVICE_[DE]ATTACH_IOASID Liu Yi L 2021-09-19 6:38 ` Liu Yi L 2021-09-21 18:04 ` Jason Gunthorpe 2021-09-21 18:04 ` Jason Gunthorpe via iommu 2021-09-22 3:56 ` Tian, Kevin 2021-09-22 3:56 ` Tian, Kevin 2021-09-22 12:58 ` Jason Gunthorpe 2021-09-22 12:58 ` Jason Gunthorpe via iommu 2021-09-22 14:17 ` Tian, Kevin 2021-09-22 14:17 ` Tian, Kevin 2021-09-19 6:38 ` [RFC 16/20] vfio/type1: Export symbols for dma [un]map code sharing Liu Yi L 2021-09-19 6:38 ` Liu Yi L 2021-09-21 18:14 ` Jason Gunthorpe 2021-09-21 18:14 ` Jason Gunthorpe via iommu 2021-09-22 3:57 ` Tian, Kevin 2021-09-22 3:57 ` Tian, Kevin 2021-09-19 6:38 ` [RFC 17/20] iommu/iommufd: Report iova range to userspace Liu Yi L 2021-09-19 6:38 ` Liu Yi L 2021-09-19 9:38 ` kernel test robot 2021-09-19 16:41 ` kernel test robot 2021-09-22 14:49 ` Jean-Philippe Brucker 2021-09-22 14:49 ` Jean-Philippe Brucker 2021-09-29 10:44 ` Liu, Yi L 2021-09-29 10:44 ` Liu, Yi L 2021-09-29 12:07 ` Jean-Philippe Brucker 2021-09-29 12:07 ` Jean-Philippe Brucker 2021-09-29 12:31 ` Jason Gunthorpe 2021-09-29 12:31 ` Jason Gunthorpe via iommu 2021-09-19 6:38 ` [RFC 18/20] iommu/iommufd: Add IOMMU_[UN]MAP_DMA on IOASID Liu Yi L 2021-09-19 6:38 ` Liu Yi L 2021-09-19 11:53 ` kernel test robot 2021-09-19 6:38 ` [RFC 19/20] iommu/vt-d: Implement device_info iommu_ops callback Liu Yi L 2021-09-19 6:38 ` Liu Yi L 2021-09-19 6:38 ` [RFC 20/20] Doc: Add documentation for /dev/iommu Liu Yi L 2021-09-19 6:38 ` Liu Yi L 2021-10-29 0:15 ` David Gibson 2021-10-29 0:15 ` David Gibson 2021-10-29 12:44 ` Jason Gunthorpe 2021-10-29 12:44 ` Jason Gunthorpe via iommu 2021-09-19 6:45 ` [RFC 00/20] Introduce /dev/iommu for userspace I/O address space management Liu, Yi L 2021-09-19 6:45 ` Liu, Yi L 2021-09-21 13:45 ` Jason Gunthorpe 2021-09-21 13:45 ` Jason Gunthorpe via iommu 2021-09-22 3:25 ` Liu, Yi L 2021-09-22 3:25 ` Liu, Yi L
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