From: "Tian, Kevin" <kevin.tian@intel.com>
To: Jason Gunthorpe <jgg@nvidia.com>,
Alex Williamson <alex.williamson@redhat.com>
Cc: Yishai Hadas <yishaih@nvidia.com>,
"saeedm@nvidia.com" <saeedm@nvidia.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"kuba@kernel.org" <kuba@kernel.org>,
"Martins, Joao" <joao.m.martins@oracle.com>,
"leonro@nvidia.com" <leonro@nvidia.com>,
"maorg@nvidia.com" <maorg@nvidia.com>,
"cohuck@redhat.com" <cohuck@redhat.com>
Subject: RE: [PATCH V2 vfio 06/11] vfio: Introduce the DMA logging feature support
Date: Thu, 21 Jul 2022 08:54:39 +0000 [thread overview]
Message-ID: <BN9PR11MB527610E578F01DC631F626A88C919@BN9PR11MB5276.namprd11.prod.outlook.com> (raw)
In-Reply-To: <20220719200825.GK4609@nvidia.com>
> From: Jason Gunthorpe <jgg@nvidia.com>
> Sent: Wednesday, July 20, 2022 4:08 AM
>
> On Tue, Jul 19, 2022 at 01:25:14PM -0600, Alex Williamson wrote:
>
> > > We don't really expect user space to hit this limit, the RAM in QEMU is
> > > divided today to around ~12 ranges as we saw so far in our evaluation.
> >
> > There can be far more for vIOMMU use cases or non-QEMU drivers.
>
> Not really, it isn't dynamic so vIOMMU has to decide what it wants to
> track up front. It would never make sense to track based on what is
> currently mapped. So it will be some small list, probably a big linear
> chunk of the IOVA space.
How would vIOMMU make such decision when the address space
is managed by the guest? it is dynamic and could be sparse. I'm
curious about any example a vIOMMU can use to generate such small
list. Would it be a single range based on aperture reported from the
kernel?
next prev parent reply other threads:[~2022-07-21 8:54 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-14 8:12 [PATCH V2 vfio 00/11] Add device DMA logging support for mlx5 driver Yishai Hadas
2022-07-14 8:12 ` [PATCH V2 vfio 01/11] net/mlx5: Introduce ifc bits for page tracker Yishai Hadas
2022-07-21 8:28 ` Tian, Kevin
2022-07-21 8:43 ` Yishai Hadas
2022-07-14 8:12 ` [PATCH V2 vfio 02/11] net/mlx5: Query ADV_VIRTUALIZATION capabilities Yishai Hadas
2022-07-14 8:12 ` [PATCH V2 vfio 03/11] vfio: Introduce DMA logging uAPIs Yishai Hadas
2022-07-18 22:29 ` Alex Williamson
2022-07-19 1:39 ` Tian, Kevin
2022-07-19 5:40 ` Kirti Wankhede
2022-07-19 7:49 ` Yishai Hadas
2022-07-19 19:57 ` Alex Williamson
2022-07-19 20:18 ` Jason Gunthorpe
2022-07-21 8:45 ` Tian, Kevin
2022-07-21 12:05 ` Jason Gunthorpe
2022-07-25 7:20 ` Tian, Kevin
2022-07-25 14:33 ` Jason Gunthorpe
2022-07-26 7:07 ` Tian, Kevin
[not found] ` <56bd06d3-944c-18da-86ed-ae14ce5940b7@nvidia.com>
2022-07-25 7:30 ` Tian, Kevin
2022-07-26 8:37 ` Yishai Hadas
2022-07-26 14:03 ` Alex Williamson
2022-07-26 15:04 ` Jason Gunthorpe
2022-07-28 4:05 ` Tian, Kevin
2022-07-28 12:06 ` Jason Gunthorpe
2022-07-29 3:01 ` Tian, Kevin
2022-07-29 14:11 ` Jason Gunthorpe
2022-07-14 8:12 ` [PATCH V2 vfio 04/11] vfio: Move vfio.c to vfio_main.c Yishai Hadas
2022-07-14 8:12 ` [PATCH V2 vfio 05/11] vfio: Add an IOVA bitmap support Yishai Hadas
2022-07-18 22:30 ` Alex Williamson
2022-07-18 22:46 ` Jason Gunthorpe
2022-07-19 19:01 ` Alex Williamson
2022-07-20 1:57 ` Joao Martins
2022-07-20 16:47 ` Alex Williamson
2022-07-20 17:27 ` Jason Gunthorpe
2022-07-20 18:16 ` Joao Martins
2022-07-14 8:12 ` [PATCH V2 vfio 06/11] vfio: Introduce the DMA logging feature support Yishai Hadas
2022-07-18 22:30 ` Alex Williamson
2022-07-19 9:19 ` Yishai Hadas
2022-07-19 19:25 ` Alex Williamson
2022-07-19 20:08 ` Jason Gunthorpe
2022-07-21 8:54 ` Tian, Kevin [this message]
2022-07-21 11:50 ` Jason Gunthorpe
2022-07-25 7:38 ` Tian, Kevin
2022-07-25 14:37 ` Jason Gunthorpe
2022-07-26 7:34 ` Tian, Kevin
2022-07-26 15:12 ` Jason Gunthorpe
2022-07-14 8:12 ` [PATCH V2 vfio 07/11] vfio/mlx5: Init QP based resources for dirty tracking Yishai Hadas
2022-07-14 8:12 ` [PATCH V2 vfio 08/11] vfio/mlx5: Create and destroy page tracker object Yishai Hadas
2022-07-14 8:12 ` [PATCH V2 vfio 09/11] vfio/mlx5: Report dirty pages from tracker Yishai Hadas
2022-07-14 8:12 ` [PATCH V2 vfio 10/11] vfio/mlx5: Manage error scenarios on tracker Yishai Hadas
2022-07-14 8:12 ` [PATCH V2 vfio 11/11] vfio/mlx5: Set the driver DMA logging callbacks Yishai Hadas
2022-07-21 8:26 ` [PATCH V2 vfio 00/11] Add device DMA logging support for mlx5 driver Tian, Kevin
2022-07-21 8:55 ` Yishai Hadas
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