From: Simon Martin <furryfuttock@gmail.com>
To: xen-devel@lists.xen.org
Subject: Grant access to more than one dom
Date: Thu, 17 Apr 2014 11:58:49 -0300 [thread overview]
Message-ID: <1005757746.20140417115849@gmail.com> (raw)
Hi all,
The system I am implementing has 2 domU: Windows, and realtime,
and I need to share memory between them. Originally I had the
realtime domU produce a page and which was then consumed by the
Windows domU, however given the way that the realtime domU works,
this can terminate and restart, which will destroy and invalidate
the shared memory page.
To simplify things I have written a simple little app that runs in
dom0, creates the shared memory page(s) and then starts both the
domUs. If either domU stops, it is automatically restarted, but as
the shared memory belongs to dom0 it stays stable across restarts.
However I now need to share this grant between multiple domUs. As
far as I can see the grant ref only allows access from a single dom.
How do I work around this? It must be possible, otherwise all driver
implementations would require a memcpy by dom0.
--
Best regards,
Simon mailto:furryfuttock@gmail.com
next reply other threads:[~2014-04-17 14:58 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-17 14:58 Simon Martin [this message]
2014-04-17 15:03 ` Grant access to more than one dom Ian Campbell
2014-04-17 15:07 ` Simon Martin
2014-04-17 15:38 ` Simon Martin
2014-04-17 16:14 ` Ian Campbell
2014-04-17 16:57 ` Simon Martin
2014-04-17 17:16 ` Daniel De Graaf
2014-04-17 18:06 ` Simon Martin
2014-04-25 12:12 ` Simon Martin
2014-04-25 12:16 ` Ian Campbell
2014-04-25 12:18 ` Simon Martin
2014-04-25 12:28 ` Ian Campbell
2014-05-08 15:47 ` Simon Martin
2014-05-08 19:01 ` Daniel De Graaf
2014-05-08 20:03 ` Simon Martin
2014-05-08 20:23 ` Daniel De Graaf
2014-05-09 14:00 ` Simon Martin
2014-06-05 16:10 ` Simon Martin
2014-06-06 9:51 ` Ian Campbell
2014-06-06 21:02 ` Daniel De Graaf
2014-06-09 15:53 ` Simon Martin
2014-06-09 17:15 ` Daniel De Graaf
2014-06-10 18:48 ` Simon Martin
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