From: Jason Gunthorpe <jgg@nvidia.com> To: "Raj, Ashok" <ashok.raj@intel.com> Cc: "Tian, Kevin" <kevin.tian@intel.com>, Jean-Philippe Brucker <jean-philippe@linaro.org>, Jacob Pan <jacob.jun.pan@linux.intel.com>, Alex Williamson <alex.williamson@redhat.com>, "Liu, Yi L" <yi.l.liu@intel.com>, Auger Eric <eric.auger@redhat.com>, LKML <linux-kernel@vger.kernel.org>, Joerg Roedel <joro@8bytes.org>, Lu Baolu <baolu.lu@linux.intel.com>, David Woodhouse <dwmw2@infradead.org>, "iommu@lists.linux-foundation.org" <iommu@lists.linux-foundation.org>, "cgroups@vger.kernel.org" <cgroups@vger.kernel.org>, Tejun Heo <tj@kernel.org>, Li Zefan <lizefan@huawei.com>, Johannes Weiner <hannes@cmpxchg.org>, Jean-Philippe Brucker <jean-philippe@linaro.com>, Jonathan Corbet <corbet@lwn.net>, "Wu, Hao" <hao.wu@intel.com>, "Jiang, Dave" <dave.jiang@intel.com> Subject: Re: [PATCH V4 05/18] iommu/ioasid: Redefine IOASID set and allocation APIs Date: Mon, 10 May 2021 12:31:11 -0300 [thread overview] Message-ID: <20210510153111.GB1002214@nvidia.com> (raw) In-Reply-To: <20210510152502.GA90095@otc-nc-03> On Mon, May 10, 2021 at 08:25:02AM -0700, Raj, Ashok wrote: > Global PASID doesn't break anything, but giving that control to vIOMMU > doesn't seem right. When we have mixed uses cases like hardware that > supports shared wq and SRIOV devices that need PASIDs we need to > comprehend how they will work without having a backend to migrate PASIDs > to new destination. Why wouldn't there be a backend? SRIOV live migration is a real thing now (see Max's VFIO patches). The PASID space of the entire dedicated RID needs to be migratable, which means the destination vIOMMU must be able to program its local hardware with the same PASID numbers and any kind of global PASID scheme at all will interfere with it. > When we have both SRIOV and shared WQ exposed to the same guest, we > do have an issue. The simplest way that I thought was to have a guest > and host PASID separation. Where the guest has its own PASID space > and host has its own carved out. Guest can do what ever it wants within > that allocated space without fear of any collition with any other device. And how do you reliably migrate if the target kernel has a PASID already allocated in that range? ENQCMD must not assume it is the only thing in the platform. It needs to be compartmentalized to specific participating RIDs and made explicit because it has a bad special requirement for cross-device PASIDs Jason
next prev parent reply other threads:[~2021-05-10 15:31 UTC|newest]
Thread overview: 269+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-27 22:01 [PATCH V4 00/18] IOASID extensions for guest SVA Jacob Pan
2021-02-27 22:01 ` [PATCH V4 01/18] docs: Document IO Address Space ID (IOASID) APIs Jacob Pan
2021-02-27 22:01 ` [PATCH V4 02/18] iommu/ioasid: Rename ioasid_set_data() Jacob Pan
2021-02-27 22:01 ` [PATCH V4 03/18] iommu/ioasid: Add a separate function for detach data Jacob Pan
2021-02-27 22:01 ` [PATCH V4 04/18] iommu/ioasid: Support setting system-wide capacity Jacob Pan
2021-02-27 22:01 ` [PATCH V4 05/18] iommu/ioasid: Redefine IOASID set and allocation APIs Jacob Pan
2021-03-19 0:22 ` Jacob Pan
2021-03-19 9:58 ` Jean-Philippe Brucker
2021-03-19 12:46 ` Jason Gunthorpe
2021-03-19 13:41 ` Jean-Philippe Brucker
2021-03-19 13:54 ` Jason Gunthorpe
2021-03-19 18:22 ` Jacob Pan
2021-03-22 9:24 ` Jean-Philippe Brucker
2021-03-24 17:02 ` Jacob Pan
2021-03-24 17:03 ` Jason Gunthorpe
2021-03-24 22:12 ` Jacob Pan
2021-03-25 10:21 ` Jean-Philippe Brucker
2021-03-25 17:02 ` Jacob Pan
2021-03-25 17:16 ` Jason Gunthorpe
2021-03-25 18:23 ` Jacob Pan
2021-03-26 8:06 ` Jean-Philippe Brucker
2021-03-30 13:07 ` Jason Gunthorpe
2021-03-30 13:42 ` Jean-Philippe Brucker
2021-03-30 13:46 ` Jason Gunthorpe
2021-03-25 10:26 ` Jean-Philippe Brucker
2021-03-22 12:03 ` Jason Gunthorpe
2021-03-24 19:05 ` Jacob Pan
2021-03-29 16:31 ` Jason Gunthorpe
2021-03-29 22:55 ` Jacob Pan
2021-03-30 13:43 ` Jason Gunthorpe
2021-03-31 0:10 ` Jacob Pan
2021-03-31 12:28 ` Jason Gunthorpe
2021-03-31 16:34 ` Jacob Pan
2021-03-31 17:31 ` Jason Gunthorpe
2021-03-31 18:20 ` Jacob Pan
2021-03-31 18:33 ` Jason Gunthorpe
2021-03-31 21:50 ` Jacob Pan
2021-03-31 8:38 ` Liu, Yi L
2021-03-30 1:37 ` Tian, Kevin
2021-03-30 13:28 ` Jason Gunthorpe
2021-03-31 7:38 ` Liu, Yi L
2021-03-31 12:40 ` Jason Gunthorpe
2021-04-01 4:38 ` Liu, Yi L
2021-04-01 7:04 ` Liu, Yi L
2021-04-01 11:54 ` Jason Gunthorpe
2021-04-02 12:46 ` Liu, Yi L
2021-04-01 12:05 ` Jean-Philippe Brucker
2021-04-01 12:12 ` Jason Gunthorpe
2021-04-01 13:38 ` Liu, Yi L
2021-04-01 13:42 ` Jason Gunthorpe
2021-04-01 14:08 ` Liu, Yi L
2021-04-01 16:03 ` Jason Gunthorpe
2021-04-02 7:30 ` Tian, Kevin
2021-04-05 23:35 ` Jason Gunthorpe
2021-04-06 0:37 ` Tian, Kevin
2021-04-06 12:15 ` Jason Gunthorpe
2021-04-15 13:11 ` Auger Eric
2021-04-15 23:07 ` Jason Gunthorpe
2021-04-16 13:12 ` Jacob Pan
2021-04-16 15:45 ` Alex Williamson
2021-04-16 17:23 ` Jacob Pan
2021-04-16 17:54 ` Jason Gunthorpe
2021-04-21 13:18 ` Liu, Yi L
2021-04-21 16:23 ` Jason Gunthorpe
2021-04-21 16:54 ` Alex Williamson
2021-04-21 17:52 ` Jason Gunthorpe
2021-04-21 19:33 ` Alex Williamson
2021-04-21 23:03 ` Jason Gunthorpe
2021-04-22 8:34 ` Tian, Kevin
2021-04-22 12:10 ` Jason Gunthorpe
2021-04-23 9:06 ` Tian, Kevin
2021-04-23 11:49 ` Jason Gunthorpe
2021-04-25 9:24 ` Tian, Kevin
2021-04-26 12:38 ` Jason Gunthorpe
2021-04-28 6:34 ` Tian, Kevin
2021-04-28 15:06 ` Alex Williamson
2021-05-07 7:36 ` Tian, Kevin
2021-05-07 11:56 ` Jason Gunthorpe
2021-05-07 17:06 ` Alex Williamson
2021-05-07 17:10 ` Jason Gunthorpe
2021-05-08 6:08 ` Tian, Kevin
2021-05-08 7:31 ` Tian, Kevin
2021-05-10 2:56 ` Lu Baolu
2021-04-28 20:46 ` Jason Gunthorpe
2021-05-04 16:22 ` Jacob Pan
2021-05-04 16:31 ` Jason Gunthorpe
2021-05-08 5:46 ` Tian, Kevin
2021-05-04 15:41 ` Jacob Pan
2021-05-04 18:00 ` Jason Gunthorpe
2021-05-04 22:11 ` Jacob Pan
2021-05-04 23:15 ` Jason Gunthorpe
2021-05-05 17:22 ` Jacob Pan
2021-05-05 18:00 ` Jason Gunthorpe
2021-05-05 20:04 ` Jacob Pan
2021-05-05 22:21 ` Jason Gunthorpe
2021-05-05 23:23 ` Raj, Ashok
2021-05-06 12:22 ` Jason Gunthorpe
2021-05-08 7:06 ` Liu Yi L
2021-05-06 7:23 ` Jean-Philippe Brucker
2021-05-06 12:27 ` Jason Gunthorpe
2021-05-06 16:32 ` Raj, Ashok
2021-05-07 17:20 ` Jason Gunthorpe
2021-05-07 18:14 ` Raj, Ashok
2021-05-07 18:20 ` Jason Gunthorpe
2021-05-07 19:23 ` Raj, Ashok
2021-05-07 19:28 ` Jason Gunthorpe
2021-05-07 22:15 ` Jacob Pan
2021-05-08 9:56 ` Tian, Kevin
2021-05-10 12:37 ` Jason Gunthorpe
2021-05-10 15:25 ` Raj, Ashok
2021-05-10 15:31 ` Jason Gunthorpe [this message]
2021-05-10 16:22 ` Raj, Ashok
2021-05-10 16:39 ` Jason Gunthorpe
2021-05-10 22:28 ` Jacob Pan
2021-05-10 23:45 ` Jason Gunthorpe
2021-05-11 3:56 ` Jacob Pan
2021-05-11 9:10 ` Tian, Kevin
2021-05-11 13:24 ` Liu Yi L
2021-05-11 22:52 ` Tian, Kevin
2021-05-11 14:38 ` Jason Gunthorpe
2021-05-11 22:51 ` Tian, Kevin
2021-05-11 23:39 ` Jason Gunthorpe
2021-05-12 0:21 ` Tian, Kevin
2021-05-12 0:25 ` Jason Gunthorpe
2021-05-12 0:40 ` Tian, Kevin
2021-04-29 8:54 ` Auger Eric
2021-04-29 8:55 ` Auger Eric
2021-04-29 13:26 ` Auger Eric
2021-04-29 20:04 ` Jason Gunthorpe
2021-05-05 9:10 ` Auger Eric
2021-04-22 17:13 ` Alex Williamson
2021-04-22 17:57 ` Jason Gunthorpe
2021-04-22 19:37 ` Alex Williamson
2021-04-22 20:00 ` Jason Gunthorpe
2021-04-22 22:38 ` Alex Williamson
2021-04-22 23:39 ` Jason Gunthorpe
2021-04-23 10:31 ` Tian, Kevin
2021-04-23 11:57 ` Jason Gunthorpe
2021-04-27 5:11 ` David Gibson
2021-04-27 16:39 ` Jason Gunthorpe
2021-04-28 0:49 ` David Gibson
2021-04-23 16:38 ` Alex Williamson
2021-04-23 22:28 ` Jason Gunthorpe
2021-04-27 5:15 ` David Gibson
2021-04-27 5:08 ` David Gibson
2021-04-27 17:12 ` Jason Gunthorpe
2021-04-28 0:58 ` David Gibson
2021-04-28 14:56 ` Jason Gunthorpe
2021-04-29 3:04 ` David Gibson
2021-05-03 16:15 ` Jason Gunthorpe
2021-05-13 5:48 ` David Gibson
2021-05-13 13:59 ` Jason Gunthorpe
2021-05-24 7:52 ` David Gibson
2021-05-24 23:37 ` Jason Gunthorpe
2021-05-25 19:26 ` Kirti Wankhede
2021-05-25 19:52 ` Jason Gunthorpe
2021-05-25 21:18 ` Kirti Wankhede
2021-05-27 5:00 ` David Gibson
2021-05-27 18:25 ` Kirti Wankhede
2021-06-01 3:45 ` David Gibson
2021-05-27 4:58 ` David Gibson
2021-05-27 18:48 ` Jason Gunthorpe
2021-06-01 4:03 ` David Gibson
2021-06-01 12:57 ` Jason Gunthorpe
2021-06-08 0:44 ` David Gibson
2021-06-08 18:34 ` Jason Gunthorpe
2021-05-25 22:52 ` Alex Williamson
2021-05-26 18:10 ` Kirti Wankhede
2021-05-26 18:59 ` Alex Williamson
2021-05-26 19:13 ` Jason Gunthorpe
2021-05-27 4:53 ` David Gibson
2021-05-27 19:06 ` Jason Gunthorpe
2021-06-01 4:27 ` David Gibson
2021-04-28 6:58 ` Tian, Kevin
2021-05-04 17:12 ` Jason Gunthorpe
2021-05-07 8:09 ` Tian, Kevin
2021-04-28 7:47 ` Tian, Kevin
2021-04-28 18:41 ` Jason Gunthorpe
2021-04-27 4:50 ` David Gibson
2021-04-27 17:24 ` Jason Gunthorpe
2021-04-28 1:23 ` David Gibson
2021-04-29 0:21 ` Jason Gunthorpe
2021-04-29 3:20 ` David Gibson
2021-05-03 16:05 ` Jason Gunthorpe
2021-05-04 3:54 ` David Gibson
2021-05-04 18:15 ` Jason Gunthorpe
2021-05-05 4:28 ` Alexey Kardashevskiy
2021-05-05 16:39 ` Jason Gunthorpe
2021-05-13 6:07 ` David Gibson
2021-05-13 13:50 ` Jason Gunthorpe
2021-05-24 7:56 ` David Gibson
2021-05-13 6:01 ` David Gibson
2021-05-13 6:52 ` Tian, Kevin
2021-05-13 13:47 ` Jason Gunthorpe
2021-04-22 12:55 ` Liu Yi L
2021-04-16 13:38 ` Auger Eric
2021-04-16 14:05 ` Jason Gunthorpe
2021-04-16 14:26 ` Auger Eric
2021-04-16 14:34 ` Jason Gunthorpe
2021-04-16 15:00 ` Auger Eric
2021-04-01 11:46 ` Jason Gunthorpe
2021-04-01 13:10 ` Liu, Yi L
2021-04-01 13:15 ` Jason Gunthorpe
2021-04-01 13:43 ` Liu, Yi L
2021-04-01 13:46 ` Jason Gunthorpe
2021-04-02 7:58 ` Tian, Kevin
2021-04-05 23:39 ` Jason Gunthorpe
2021-04-06 1:02 ` Tian, Kevin
2021-04-06 12:21 ` Jason Gunthorpe
2021-04-07 2:23 ` Tian, Kevin
[not found] ` <MWHPR11MB188628BDB37A4EE36F3D99338C769@MWHPR11MB1886.namprd11.prod.outlook.com>
2021-04-06 2:08 ` Tian, Kevin
2021-04-02 10:01 ` Tian, Kevin
2021-04-02 8:22 ` Tian, Kevin
2021-04-05 23:42 ` Jason Gunthorpe
2021-04-06 1:27 ` Tian, Kevin
2021-04-06 12:34 ` Jason Gunthorpe
2021-04-07 2:08 ` Tian, Kevin
2021-04-07 12:20 ` Jason Gunthorpe
2021-04-07 23:50 ` Tian, Kevin
2021-04-08 11:41 ` Jason Gunthorpe
2021-04-06 1:35 ` Jason Wang
2021-04-06 12:42 ` Jason Gunthorpe
2021-04-07 2:06 ` Jason Wang
2021-04-07 8:17 ` Tian, Kevin
2021-04-07 11:58 ` Jason Gunthorpe
2021-04-07 18:43 ` Jean-Philippe Brucker
2021-04-07 19:36 ` Jason Gunthorpe
2021-04-08 9:37 ` Jean-Philippe Brucker
2021-03-30 2:24 ` Tian, Kevin
2021-03-30 13:24 ` Jason Gunthorpe
2021-03-30 4:14 ` Tian, Kevin
2021-03-30 13:27 ` Jason Gunthorpe
2021-03-31 7:41 ` Liu, Yi L
2021-03-31 12:38 ` Jason Gunthorpe
2021-03-31 23:46 ` Jacob Pan
2021-04-01 0:37 ` Jason Gunthorpe
2021-04-01 17:23 ` Jacob Pan
2021-04-01 17:26 ` Jason Gunthorpe
2021-03-19 17:14 ` Jacob Pan
2021-02-27 22:01 ` [PATCH V4 06/18] iommu/ioasid: Add free function and states Jacob Pan
2021-02-27 22:01 ` [PATCH V4 07/18] iommu/ioasid: Add ioasid_set iterator helper functions Jacob Pan
2021-02-27 22:01 ` [PATCH V4 08/18] iommu/ioasid: Introduce ioasid_set private ID Jacob Pan
2021-02-27 22:01 ` [PATCH V4 09/18] iommu/ioasid: Introduce notification APIs Jacob Pan
2021-02-27 22:01 ` [PATCH V4 10/18] iommu/ioasid: Support mm token type ioasid_set notifications Jacob Pan
2021-02-27 22:01 ` [PATCH V4 11/18] iommu/ioasid: Add ownership check in guest bind Jacob Pan
2021-02-27 22:01 ` [PATCH V4 12/18] iommu/vt-d: Remove mm reference for guest SVA Jacob Pan
2021-02-27 22:01 ` [PATCH V4 13/18] iommu/ioasid: Add a workqueue for cleanup work Jacob Pan
2021-02-27 22:01 ` [PATCH V4 14/18] iommu/vt-d: Listen to IOASID notifications Jacob Pan
2021-02-27 22:01 ` [RFC PATCH 15/18] cgroup: Introduce ioasids controller Jacob Pan
2021-03-03 15:44 ` Tejun Heo
2021-03-03 21:17 ` Jacob Pan
2021-03-04 0:02 ` Jacob Pan
2021-03-04 0:23 ` Jason Gunthorpe
2021-03-04 9:49 ` Jean-Philippe Brucker
2021-03-04 17:46 ` Jacob Pan
2021-03-04 17:54 ` Jason Gunthorpe
2021-03-04 19:01 ` Jacob Pan
2021-03-04 19:02 ` Jason Gunthorpe
2021-03-04 21:28 ` Jacob Pan
2021-03-05 8:30 ` Jean-Philippe Brucker
2021-03-05 17:16 ` Jean-Philippe Brucker
2021-03-05 18:20 ` Jacob Pan
2021-02-27 22:01 ` [RFC PATCH 16/18] iommu/ioasid: Consult IOASIDs cgroup for allocation Jacob Pan
2021-02-27 22:01 ` [RFC PATCH 17/18] docs: cgroup-v1: Add IOASIDs controller Jacob Pan
2021-02-27 22:01 ` [RFC PATCH 18/18] ioasid: Add /dev/ioasid for userspace Jacob Pan
2021-03-10 19:23 ` Jason Gunthorpe
2021-03-11 22:55 ` Jacob Pan
2021-03-12 14:54 ` Jason Gunthorpe
2021-03-02 12:58 ` [PATCH V4 00/18] IOASID extensions for guest SVA Liu, Yi L
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