From: Peter Chubb <peter@chubb.wattle.id.au>
To: Or Sagi <ors@tutis.com>
Cc: linux-kernel@vger.kernel.org, calebm@gelato.unsw.edu.au
Subject: Re: [RFC] Deferred interrupt handling.
Date: Thu, 19 Jul 2007 10:15:17 +1000 [thread overview]
Message-ID: <87sl7lgsfe.wl%peter@chubb.wattle.id.au> (raw)
The problem you're having is essentially the same as the user-level
interrupt handler problem I've been dealing with for ages.
The basic rule is: don't share interrupts between devices on the host
and devices in the guest. But you *can* share interrupts between
devices in a single guest.
If you want the code, see
http://www.gelato.unsw.edu.au/cgi-bin/viewvc.cgi/cvs/kernel/usrdrivers/latest/
and look at generic-irq.patch and fasync (which adds asynchronous notifications)
For the KVM work it'll need modifying a little, but the basic
infrastructure is there.
We've currently got this working to pass interrupts to a type-II (hosted)
virtual machine monitor running a guest kernel with native drivers.
--
Dr Peter Chubb http://www.gelato.unsw.edu.au peterc AT gelato.unsw.edu.au
http://www.ertos.nicta.com.au ERTOS within National ICT Australia
next reply other threads:[~2007-07-19 0:58 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-19 0:15 Peter Chubb [this message]
-- strict thread matches above, loose matches on Subject: below --
2007-07-18 9:53 Or Sagi
2007-07-18 11:30 ` Alan Cox
2007-07-18 15:57 ` Lennart Sorensen
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