From: David Gibson <david@gibson.dropbear.id.au>
To: Jason Gunthorpe <jgg@nvidia.com>
Cc: Alexey Kardashevskiy <aik@ozlabs.ru>,
Alex Williamson <alex.williamson@redhat.com>,
Jean-Philippe Brucker <jean-philippe@linaro.org>,
Chaitanya Kulkarni <chaitanyak@nvidia.com>,
kvm@vger.kernel.org, "Michael S. Tsirkin" <mst@redhat.com>,
Jason Wang <jasowang@redhat.com>,
Cornelia Huck <cohuck@redhat.com>,
Niklas Schnelle <schnelle@linux.ibm.com>,
Kevin Tian <kevin.tian@intel.com>,
Daniel Jordan <daniel.m.jordan@oracle.com>,
iommu@lists.linux-foundation.org,
Joao Martins <joao.m.martins@oracle.com>
Subject: Re: [PATCH RFC 11/12] iommufd: vfio container FD ioctl compatibility
Date: Wed, 25 May 2022 11:39:39 +1000 [thread overview]
Message-ID: <Yo2I2zfDTEg8+PjE@yekko> (raw)
In-Reply-To: <20220524132553.GR1343366@nvidia.com>
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On Tue, May 24, 2022 at 10:25:53AM -0300, Jason Gunthorpe wrote:
> On Mon, May 23, 2022 at 04:02:22PM +1000, Alexey Kardashevskiy wrote:
>
> > Which means the guest RAM does not need to be all mapped in that base IOAS
> > suggested down this thread as that would mean all memory is pinned and
> > powervm won't be able to swap it out (yeah, it can do such thing now!). Not
> > sure if we really want to support this or stick to a simpler design.
>
> Huh? How can it swap? Calling GUP is not optional. Either you call GUP
> at the start and there is no swap, or you call GUP for each vIOMMU
> hypercall.
>
> Since everyone says PPC doesn't call GUP during the hypercall - how is
> it working?
The current implementation does GUP during the pre-reserve. I think
Alexey's talking about a new PowerVM (IBM hypervisor) feature; I don't
know how that works.
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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WARNING: multiple messages have this Message-ID (diff)
From: David Gibson <david@gibson.dropbear.id.au>
To: Jason Gunthorpe <jgg@nvidia.com>
Cc: Jean-Philippe Brucker <jean-philippe@linaro.org>,
Chaitanya Kulkarni <chaitanyak@nvidia.com>,
kvm@vger.kernel.org, "Michael S. Tsirkin" <mst@redhat.com>,
Jason Wang <jasowang@redhat.com>,
Cornelia Huck <cohuck@redhat.com>,
Niklas Schnelle <schnelle@linux.ibm.com>,
Kevin Tian <kevin.tian@intel.com>,
iommu@lists.linux-foundation.org,
Daniel Jordan <daniel.m.jordan@oracle.com>,
Alex Williamson <alex.williamson@redhat.com>,
Joao Martins <joao.m.martins@oracle.com>
Subject: Re: [PATCH RFC 11/12] iommufd: vfio container FD ioctl compatibility
Date: Wed, 25 May 2022 11:39:39 +1000 [thread overview]
Message-ID: <Yo2I2zfDTEg8+PjE@yekko> (raw)
In-Reply-To: <20220524132553.GR1343366@nvidia.com>
[-- Attachment #1.1: Type: text/plain, Size: 1071 bytes --]
On Tue, May 24, 2022 at 10:25:53AM -0300, Jason Gunthorpe wrote:
> On Mon, May 23, 2022 at 04:02:22PM +1000, Alexey Kardashevskiy wrote:
>
> > Which means the guest RAM does not need to be all mapped in that base IOAS
> > suggested down this thread as that would mean all memory is pinned and
> > powervm won't be able to swap it out (yeah, it can do such thing now!). Not
> > sure if we really want to support this or stick to a simpler design.
>
> Huh? How can it swap? Calling GUP is not optional. Either you call GUP
> at the start and there is no swap, or you call GUP for each vIOMMU
> hypercall.
>
> Since everyone says PPC doesn't call GUP during the hypercall - how is
> it working?
The current implementation does GUP during the pre-reserve. I think
Alexey's talking about a new PowerVM (IBM hypervisor) feature; I don't
know how that works.
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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next prev parent reply other threads:[~2022-05-25 1:47 UTC|newest]
Thread overview: 244+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-18 17:27 [PATCH RFC 00/12] IOMMUFD Generic interface Jason Gunthorpe
2022-03-18 17:27 ` Jason Gunthorpe via iommu
2022-03-18 17:27 ` [PATCH RFC 01/12] interval-tree: Add a utility to iterate over spans in an interval tree Jason Gunthorpe
2022-03-18 17:27 ` Jason Gunthorpe via iommu
2022-03-18 17:27 ` [PATCH RFC 02/12] iommufd: Overview documentation Jason Gunthorpe
2022-03-18 17:27 ` Jason Gunthorpe via iommu
2022-03-18 17:27 ` [PATCH RFC 03/12] iommufd: File descriptor, context, kconfig and makefiles Jason Gunthorpe
2022-03-18 17:27 ` Jason Gunthorpe via iommu
2022-03-22 14:18 ` Niklas Schnelle
2022-03-22 14:18 ` Niklas Schnelle
2022-03-22 14:50 ` Jason Gunthorpe
2022-03-22 14:50 ` Jason Gunthorpe via iommu
2022-03-18 17:27 ` [PATCH RFC 04/12] kernel/user: Allow user::locked_vm to be usable for iommufd Jason Gunthorpe
2022-03-18 17:27 ` Jason Gunthorpe via iommu
2022-03-22 14:28 ` Niklas Schnelle
2022-03-22 14:28 ` Niklas Schnelle
2022-03-22 14:57 ` Jason Gunthorpe
2022-03-22 14:57 ` Jason Gunthorpe via iommu
2022-03-22 15:29 ` Alex Williamson
2022-03-22 15:29 ` Alex Williamson
2022-03-22 16:15 ` Jason Gunthorpe
2022-03-22 16:15 ` Jason Gunthorpe via iommu
2022-03-24 2:11 ` Tian, Kevin
2022-03-24 2:11 ` Tian, Kevin
2022-03-24 2:27 ` Jason Wang
2022-03-24 2:27 ` Jason Wang
2022-03-24 2:42 ` Tian, Kevin
2022-03-24 2:42 ` Tian, Kevin
2022-03-24 2:57 ` Jason Wang
2022-03-24 2:57 ` Jason Wang
2022-03-24 3:15 ` Tian, Kevin
2022-03-24 3:15 ` Tian, Kevin
2022-03-24 3:50 ` Jason Wang
2022-03-24 3:50 ` Jason Wang
2022-03-24 4:29 ` Tian, Kevin
2022-03-24 4:29 ` Tian, Kevin
2022-03-24 11:46 ` Jason Gunthorpe
2022-03-24 11:46 ` Jason Gunthorpe via iommu
2022-03-28 1:53 ` Jason Wang
2022-03-28 1:53 ` Jason Wang
2022-03-28 12:22 ` Jason Gunthorpe
2022-03-28 12:22 ` Jason Gunthorpe via iommu
2022-03-29 4:59 ` Jason Wang
2022-03-29 4:59 ` Jason Wang
2022-03-29 11:46 ` Jason Gunthorpe
2022-03-29 11:46 ` Jason Gunthorpe via iommu
2022-03-28 13:14 ` Sean Mooney
2022-03-28 13:14 ` Sean Mooney
2022-03-28 14:27 ` Jason Gunthorpe via iommu
2022-03-28 14:27 ` Jason Gunthorpe
2022-03-24 20:40 ` Alex Williamson
2022-03-24 20:40 ` Alex Williamson
2022-03-24 22:27 ` Jason Gunthorpe
2022-03-24 22:27 ` Jason Gunthorpe via iommu
2022-03-24 22:41 ` Alex Williamson
2022-03-24 22:41 ` Alex Williamson
2022-03-22 16:31 ` Niklas Schnelle
2022-03-22 16:31 ` Niklas Schnelle
2022-03-22 16:41 ` Jason Gunthorpe via iommu
2022-03-22 16:41 ` Jason Gunthorpe
2022-03-18 17:27 ` [PATCH RFC 05/12] iommufd: PFN handling for iopt_pages Jason Gunthorpe
2022-03-18 17:27 ` Jason Gunthorpe via iommu
2022-03-23 15:37 ` Niklas Schnelle
2022-03-23 15:37 ` Niklas Schnelle
2022-03-23 16:09 ` Jason Gunthorpe
2022-03-23 16:09 ` Jason Gunthorpe via iommu
2022-03-18 17:27 ` [PATCH RFC 06/12] iommufd: Algorithms for PFN storage Jason Gunthorpe
2022-03-18 17:27 ` Jason Gunthorpe via iommu
2022-03-18 17:27 ` [PATCH RFC 07/12] iommufd: Data structure to provide IOVA to PFN mapping Jason Gunthorpe
2022-03-18 17:27 ` Jason Gunthorpe via iommu
2022-03-22 22:15 ` Alex Williamson
2022-03-22 22:15 ` Alex Williamson
2022-03-23 18:15 ` Jason Gunthorpe
2022-03-23 18:15 ` Jason Gunthorpe via iommu
2022-03-24 3:09 ` Tian, Kevin
2022-03-24 3:09 ` Tian, Kevin
2022-03-24 12:46 ` Jason Gunthorpe
2022-03-24 12:46 ` Jason Gunthorpe via iommu
2022-03-25 13:34 ` zhangfei.gao
2022-03-25 13:34 ` zhangfei.gao
2022-03-25 17:19 ` Jason Gunthorpe via iommu
2022-03-25 17:19 ` Jason Gunthorpe
2022-04-13 14:02 ` Yi Liu
2022-04-13 14:02 ` Yi Liu
2022-04-13 14:36 ` Jason Gunthorpe
2022-04-13 14:36 ` Jason Gunthorpe via iommu
2022-04-13 14:49 ` Yi Liu
2022-04-13 14:49 ` Yi Liu
2022-04-17 14:56 ` Yi Liu
2022-04-17 14:56 ` Yi Liu
2022-04-18 10:47 ` Yi Liu
2022-04-18 10:47 ` Yi Liu
2022-03-18 17:27 ` [PATCH RFC 08/12] iommufd: IOCTLs for the io_pagetable Jason Gunthorpe
2022-03-18 17:27 ` Jason Gunthorpe via iommu
2022-03-23 19:10 ` Alex Williamson
2022-03-23 19:10 ` Alex Williamson
2022-03-23 19:34 ` Jason Gunthorpe
2022-03-23 19:34 ` Jason Gunthorpe via iommu
2022-03-23 20:04 ` Alex Williamson
2022-03-23 20:04 ` Alex Williamson
2022-03-23 20:34 ` Jason Gunthorpe via iommu
2022-03-23 20:34 ` Jason Gunthorpe
2022-03-23 22:54 ` Jason Gunthorpe
2022-03-23 22:54 ` Jason Gunthorpe via iommu
2022-03-24 7:25 ` Tian, Kevin
2022-03-24 7:25 ` Tian, Kevin
2022-03-24 13:46 ` Jason Gunthorpe via iommu
2022-03-24 13:46 ` Jason Gunthorpe
2022-03-25 2:15 ` Tian, Kevin
2022-03-25 2:15 ` Tian, Kevin
2022-03-27 2:32 ` Tian, Kevin
2022-03-27 2:32 ` Tian, Kevin
2022-03-27 14:28 ` Jason Gunthorpe
2022-03-27 14:28 ` Jason Gunthorpe via iommu
2022-03-28 17:17 ` Alex Williamson
2022-03-28 17:17 ` Alex Williamson
2022-03-28 18:57 ` Jason Gunthorpe
2022-03-28 18:57 ` Jason Gunthorpe via iommu
2022-03-28 19:47 ` Jason Gunthorpe via iommu
2022-03-28 19:47 ` Jason Gunthorpe
2022-03-28 21:26 ` Alex Williamson
2022-03-28 21:26 ` Alex Williamson
2022-03-24 6:46 ` Tian, Kevin
2022-03-24 6:46 ` Tian, Kevin
2022-03-30 13:35 ` Yi Liu
2022-03-30 13:35 ` Yi Liu
2022-03-31 12:59 ` Jason Gunthorpe via iommu
2022-03-31 12:59 ` Jason Gunthorpe
2022-04-01 13:30 ` Yi Liu
2022-04-01 13:30 ` Yi Liu
2022-03-31 4:36 ` David Gibson
2022-03-31 4:36 ` David Gibson
2022-03-31 5:41 ` Tian, Kevin
2022-03-31 5:41 ` Tian, Kevin
2022-03-31 12:58 ` Jason Gunthorpe via iommu
2022-03-31 12:58 ` Jason Gunthorpe
2022-04-28 5:58 ` David Gibson
2022-04-28 5:58 ` David Gibson
2022-04-28 14:22 ` Jason Gunthorpe
2022-04-28 14:22 ` Jason Gunthorpe via iommu
2022-04-29 6:00 ` David Gibson
2022-04-29 6:00 ` David Gibson
2022-04-29 12:54 ` Jason Gunthorpe
2022-04-29 12:54 ` Jason Gunthorpe via iommu
2022-04-30 14:44 ` David Gibson
2022-04-30 14:44 ` David Gibson
2022-03-18 17:27 ` [PATCH RFC 09/12] iommufd: Add a HW pagetable object Jason Gunthorpe
2022-03-18 17:27 ` Jason Gunthorpe via iommu
2022-03-18 17:27 ` [PATCH RFC 10/12] iommufd: Add kAPI toward external drivers Jason Gunthorpe
2022-03-18 17:27 ` Jason Gunthorpe via iommu
2022-03-23 18:10 ` Alex Williamson
2022-03-23 18:10 ` Alex Williamson
2022-03-23 18:15 ` Jason Gunthorpe
2022-03-23 18:15 ` Jason Gunthorpe via iommu
2022-05-11 12:54 ` Yi Liu
2022-05-11 12:54 ` Yi Liu
2022-05-19 9:45 ` Yi Liu
2022-05-19 9:45 ` Yi Liu
2022-05-19 12:35 ` Jason Gunthorpe
2022-05-19 12:35 ` Jason Gunthorpe via iommu
2022-03-18 17:27 ` [PATCH RFC 11/12] iommufd: vfio container FD ioctl compatibility Jason Gunthorpe
2022-03-18 17:27 ` Jason Gunthorpe via iommu
2022-03-23 22:51 ` Alex Williamson
2022-03-23 22:51 ` Alex Williamson
2022-03-24 0:33 ` Jason Gunthorpe
2022-03-24 0:33 ` Jason Gunthorpe via iommu
2022-03-24 8:13 ` Eric Auger
2022-03-24 8:13 ` Eric Auger
2022-03-24 22:04 ` Alex Williamson
2022-03-24 22:04 ` Alex Williamson
2022-03-24 23:11 ` Jason Gunthorpe
2022-03-24 23:11 ` Jason Gunthorpe via iommu
2022-03-25 3:10 ` Tian, Kevin
2022-03-25 3:10 ` Tian, Kevin
2022-03-25 11:24 ` Joao Martins
2022-03-25 11:24 ` Joao Martins
2022-04-28 14:53 ` David Gibson
2022-04-28 14:53 ` David Gibson
2022-04-28 15:10 ` Jason Gunthorpe
2022-04-28 15:10 ` Jason Gunthorpe via iommu
2022-04-29 1:21 ` Tian, Kevin
2022-04-29 1:21 ` Tian, Kevin
2022-04-29 6:22 ` David Gibson
2022-04-29 6:22 ` David Gibson
2022-04-29 12:50 ` Jason Gunthorpe
2022-04-29 12:50 ` Jason Gunthorpe via iommu
2022-05-02 4:10 ` David Gibson
2022-05-02 4:10 ` David Gibson
2022-04-29 6:20 ` David Gibson
2022-04-29 6:20 ` David Gibson
2022-04-29 12:48 ` Jason Gunthorpe
2022-04-29 12:48 ` Jason Gunthorpe via iommu
2022-05-02 7:30 ` David Gibson
2022-05-02 7:30 ` David Gibson
2022-05-05 19:07 ` Jason Gunthorpe
2022-05-05 19:07 ` Jason Gunthorpe via iommu
2022-05-06 5:25 ` David Gibson
2022-05-06 5:25 ` David Gibson
2022-05-06 10:42 ` Tian, Kevin
2022-05-06 10:42 ` Tian, Kevin
2022-05-09 3:36 ` David Gibson
2022-05-09 3:36 ` David Gibson
2022-05-06 12:48 ` Jason Gunthorpe
2022-05-06 12:48 ` Jason Gunthorpe via iommu
2022-05-09 6:01 ` David Gibson
2022-05-09 6:01 ` David Gibson
2022-05-09 14:00 ` Jason Gunthorpe
2022-05-09 14:00 ` Jason Gunthorpe via iommu
2022-05-10 7:12 ` David Gibson
2022-05-10 7:12 ` David Gibson
2022-05-10 19:00 ` Jason Gunthorpe
2022-05-10 19:00 ` Jason Gunthorpe via iommu
2022-05-11 3:15 ` Tian, Kevin
2022-05-11 3:15 ` Tian, Kevin
2022-05-11 16:32 ` Jason Gunthorpe
2022-05-11 16:32 ` Jason Gunthorpe via iommu
2022-05-11 23:23 ` Tian, Kevin
2022-05-11 23:23 ` Tian, Kevin
2022-05-13 4:35 ` David Gibson
2022-05-13 4:35 ` David Gibson
2022-05-11 4:40 ` David Gibson
2022-05-11 4:40 ` David Gibson
2022-05-11 2:46 ` Tian, Kevin
2022-05-11 2:46 ` Tian, Kevin
2022-05-23 6:02 ` Alexey Kardashevskiy
2022-05-23 6:02 ` Alexey Kardashevskiy
2022-05-24 13:25 ` Jason Gunthorpe
2022-05-24 13:25 ` Jason Gunthorpe via iommu
2022-05-25 1:39 ` David Gibson [this message]
2022-05-25 1:39 ` David Gibson
2022-05-25 2:09 ` Alexey Kardashevskiy
2022-05-25 2:09 ` Alexey Kardashevskiy
2022-03-29 9:17 ` Yi Liu
2022-03-29 9:17 ` Yi Liu
2022-03-18 17:27 ` [PATCH RFC 12/12] iommufd: Add a selftest Jason Gunthorpe
2022-03-18 17:27 ` Jason Gunthorpe via iommu
2022-04-12 20:13 ` [PATCH RFC 00/12] IOMMUFD Generic interface Eric Auger
2022-04-12 20:13 ` Eric Auger
2022-04-12 20:22 ` Jason Gunthorpe via iommu
2022-04-12 20:22 ` Jason Gunthorpe
2022-04-12 20:50 ` Eric Auger
2022-04-12 20:50 ` Eric Auger
2022-04-14 10:56 ` Yi Liu
2022-04-14 10:56 ` Yi Liu
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