From: Daniel Vetter <daniel.vetter@ffwll.ch>
To: Sakari Ailus <sakari.ailus@iki.fi>
Cc: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
Dan Williams <dan.j.williams@intel.com>,
James Bottomley <James.Bottomley@hansenpartnership.com>,
ksummit@lists.linux.dev, linux-cxl@vger.kernel.org,
linux-rdma@vger.kernel.org, netdev@vger.kernel.org,
jgg@nvidia.com
Subject: Re: [MAINTAINERS SUMMIT] Device Passthrough Considered Harmful?
Date: Wed, 31 Jul 2024 15:15:39 +0200 [thread overview]
Message-ID: <CAKMK7uGx=VjHCo90htuTE6Oi0b8rt_0NrPsfbZwFKA304m7BdA@mail.gmail.com> (raw)
In-Reply-To: <Zqol_N8qkMI--n-S@valkosipuli.retiisi.eu>
On Wed, 31 Jul 2024 at 13:55, Sakari Ailus <sakari.ailus@iki.fi> wrote:
> This is also very different from GPUs or accel devices that are built to be
> user-programmable. If I'd compare ISPs to different devices, then the
> closest match would probably be video codecs -- which also use V4L2.
Really just aside, but I figured I should correct this. DRM supports
plenty of video codecs. They're all tied to gpus, but the real reason
really is that the hw has decent command submission support so that
running the entire codec in userspace except the basic memory and
batch execution and synchronization handling in the kernel is a
feasible design. And actually good, because your kernel wont ever blow
up trying to parse complex media formats because it just doesn't.
-Sima
--
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch
next prev parent reply other threads:[~2024-07-31 13:15 UTC|newest]
Thread overview: 126+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-07-08 22:26 Dan Williams
2024-07-09 6:09 ` Christoph Hellwig
2024-07-09 19:43 ` Dan Williams
2024-07-10 13:05 ` Jason Gunthorpe
2024-07-21 18:51 ` Laurent Pinchart
2024-07-22 13:27 ` Jason Gunthorpe
2024-07-09 10:01 ` Greg KH
2024-07-09 12:25 ` Leon Romanovsky
2024-07-09 12:33 ` Greg KH
2024-07-09 12:47 ` Leon Romanovsky
2024-07-11 14:07 ` Jason Gunthorpe
2024-07-09 20:09 ` Dan Williams
2024-07-09 16:02 ` James Bottomley
2024-07-09 22:15 ` Dan Williams
2024-07-10 13:22 ` Jonathan Cameron
2024-07-11 11:00 ` Jonathan Cameron
2024-07-11 15:05 ` Jason Gunthorpe
2024-07-11 17:01 ` Jonathan Cameron
2024-07-11 17:45 ` Jason Gunthorpe
2024-07-11 16:36 ` Dan Williams
2024-07-12 10:37 ` Jonathan Cameron
2024-07-21 19:25 ` Laurent Pinchart
2024-07-22 7:31 ` Leon Romanovsky
2024-07-22 8:53 ` Laurent Pinchart
2024-07-22 10:44 ` Leon Romanovsky
2024-07-22 11:10 ` Laurent Pinchart
2024-07-22 13:28 ` Leon Romanovsky
2024-07-22 14:13 ` Laurent Pinchart
2024-07-22 14:43 ` Jason Gunthorpe
2024-07-22 10:42 ` Ricardo Ribalda Delgado
2024-07-22 11:18 ` Laurent Pinchart
2024-07-22 11:56 ` Ricardo Ribalda Delgado
2024-07-25 20:01 ` Laurent Pinchart
2024-07-26 8:04 ` Ricardo Ribalda Delgado
2024-07-26 10:59 ` Laurent Pinchart
2024-07-26 15:40 ` Ricardo Ribalda Delgado
2024-07-28 17:18 ` Laurent Pinchart
2024-07-29 9:58 ` Ricardo Ribalda Delgado
2024-07-29 10:31 ` Laurent Pinchart
2024-07-31 11:54 ` Sakari Ailus
2024-07-31 13:15 ` Daniel Vetter [this message]
2024-08-02 15:07 ` Laurent Pinchart
2024-08-13 10:17 ` Tomasz Figa
2024-08-13 10:26 ` Laurent Pinchart
2024-08-13 10:33 ` Tomasz Figa
2024-08-13 10:58 ` Laurent Pinchart
2024-07-11 13:50 ` Jason Gunthorpe
2024-07-11 15:16 ` James Bottomley
2024-07-11 16:29 ` Jason Gunthorpe
2024-07-23 11:20 ` Jiri Kosina
2024-07-23 11:36 ` James Bottomley
2024-07-23 23:22 ` Jiri Kosina
2024-07-24 20:12 ` James Bottomley
2024-07-24 20:00 ` Laurent Pinchart
2024-07-24 20:37 ` James Bottomley
2024-07-24 21:10 ` Steven Rostedt
2024-07-25 19:31 ` Laurent Pinchart
2024-07-25 19:43 ` Jason Gunthorpe
2024-07-25 20:07 ` Laurent Pinchart
2024-07-25 23:39 ` Jason Gunthorpe
2024-07-26 8:04 ` Ricardo Ribalda Delgado
2024-07-26 12:49 ` Laurent Pinchart
2024-07-26 13:11 ` Jason Gunthorpe
2024-07-26 14:22 ` Laurent Pinchart
2024-07-26 15:43 ` Ricardo Ribalda Delgado
2024-07-28 15:25 ` Laurent Pinchart
2024-07-29 9:57 ` Ricardo Ribalda Delgado
2024-07-29 14:20 ` Jason Gunthorpe
2024-07-26 8:03 ` Ricardo Ribalda Delgado
2024-07-26 13:22 ` Laurent Pinchart
2024-07-26 15:44 ` Ricardo Ribalda Delgado
2024-07-28 17:02 ` Laurent Pinchart
2024-07-26 16:49 ` James Bottomley
2024-07-28 16:44 ` Laurent Pinchart
2024-07-26 17:33 ` Daniel Vetter
2024-07-29 14:10 ` Jason Gunthorpe
2024-07-25 9:26 ` Ricardo Ribalda Delgado
2024-07-25 10:51 ` Wolfram Sang
2024-07-25 12:23 ` Leon Romanovsky
2024-07-25 13:02 ` Ricardo Ribalda Delgado
2024-07-25 13:20 ` Leon Romanovsky
2024-07-25 13:29 ` Mark Brown
2024-07-25 14:18 ` Leon Romanovsky
2024-07-25 14:22 ` James Bottomley
2024-07-25 17:37 ` Leon Romanovsky
2024-07-26 13:58 ` James Bottomley
2024-07-25 19:42 ` Laurent Pinchart
2024-07-26 8:02 ` Ricardo Ribalda Delgado
2024-07-26 13:11 ` Laurent Pinchart
2024-07-26 15:40 ` Ricardo Ribalda Delgado
2024-07-28 11:23 ` Laurent Pinchart
2024-07-29 9:56 ` Ricardo Ribalda Delgado
2024-07-29 10:38 ` Laurent Pinchart
2024-07-26 16:01 ` James Bottomley
2024-07-26 17:56 ` Laurent Pinchart
2024-07-25 13:44 ` Steven Rostedt
2024-07-26 14:27 ` Laurent Pinchart
2024-07-26 15:34 ` Steven Rostedt
2024-07-28 16:03 ` Laurent Pinchart
2024-07-27 0:16 ` Dan Williams
2024-07-28 11:18 ` Laurent Pinchart
2024-07-28 15:16 ` Greg KH
2024-07-28 15:34 ` Laurent Pinchart
2024-07-28 15:49 ` James Bottomley
2024-07-29 6:10 ` Greg KH
2024-07-31 12:33 ` James Bottomley
2024-07-31 12:45 ` Laurent Pinchart
2024-08-01 14:41 ` Jason Gunthorpe
2024-08-07 0:06 ` Dan Williams
2024-08-07 0:13 ` James Bottomley
2024-08-16 11:12 ` Hannes Reinecke
2024-07-29 14:56 ` Jakub Kicinski
2024-07-29 15:16 ` Greg KH
2024-07-29 15:29 ` Jason Gunthorpe
2024-07-29 12:45 ` Jonathan Cameron
2024-07-29 13:38 ` Borislav Petkov
2024-07-29 14:29 ` Jonathan Cameron
2024-07-29 14:58 ` Jason Gunthorpe
2024-07-30 13:19 ` Borislav Petkov
2024-08-01 14:23 ` Jason Gunthorpe
2024-07-29 15:42 ` Jason Gunthorpe
2024-07-29 22:37 ` Dan Williams
2024-07-30 7:13 ` Daniel Vetter
2024-08-01 14:22 ` Jason Gunthorpe
2024-08-06 7:14 ` Daniel Vetter
2024-08-06 13:04 ` Jason Gunthorpe
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