From: Jason Gunthorpe <jgg@nvidia.com>
To: "Tian, Kevin" <kevin.tian@intel.com>
Cc: Alex Williamson <alex.williamson@redhat.com>,
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: Mon, 25 Jul 2022 11:37:06 -0300 [thread overview]
Message-ID: <20220725143706.GD3747@nvidia.com> (raw)
In-Reply-To: <BN9PR11MB5276924990601C5770C633198C959@BN9PR11MB5276.namprd11.prod.outlook.com>
On Mon, Jul 25, 2022 at 07:38:52AM +0000, Tian, Kevin wrote:
> > Yes. qemu has to select a static aperture at start.
> >
> > The entire aperture is best, if that fails
> >
> > A smaller aperture and hope the guest doesn't use the whole space, if
> > that fails,
> >
> > The entire guest physical map and hope the guest is in PT mode
>
> That sounds a bit hacky... does it instead suggest that an interface
> for reporting the supported ranges on a tracker could be helpful once
> trying the entire aperture fails?
It is the "try and fail" approach. It gives the driver the most
flexability in processing the ranges to try and make them work. If we
attempt to describe all the device constraints that might exist we
will be here forever.
Eg the driver might be able to do the entire aperture, but it has to
use 2M pages or something.
Jason
next prev parent reply other threads:[~2022-07-25 14:37 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
2022-07-21 11:50 ` Jason Gunthorpe
2022-07-25 7:38 ` Tian, Kevin
2022-07-25 14:37 ` Jason Gunthorpe [this message]
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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