From: Rusty Russell <rusty@rustcorp.com.au>
To: Paul Brook <paul@codesourcery.com>, Pawel Moll <pawel.moll@arm.com>
Cc: Peter Maydell <peter.maydell@linaro.org>,
virtualization@lists.linux-foundation.org,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
Paolo Bonzini <pbonzini@redhat.com>
Subject: Re: [Qemu-devel] [RFC 0/4] virtio-mmio transport
Date: Fri, 16 Dec 2011 16:06:53 +1030 [thread overview]
Message-ID: <87iplhoz62.fsf@rustcorp.com.au> (raw)
In-Reply-To: <201112121445.27873.paul@codesourcery.com>
On Mon, 12 Dec 2011 14:45:26 +0000, Paul Brook <paul@codesourcery.com> wrote:
> > I can do that, but not this year (on holiday from Friday 16th, without
> > any access to Internet whatsoever :-) One think to be decided is in what
> > order the halfs should be filled? Low first, then high? High then low?
> > Does it matter at all? :-)
>
> My inital though was that you shouldn't be changing this value when the ring
> is enabled. Unfortunately you disable the ring by setting the address to zero
> so that argument doesn't work :-/
It only does that after a reset, and since reset should set the values
to 0 (I don't think the spec says that, but it will for the new config)
we needn't do it at all.
It's just a convenient value for the driver to read and know the ring
has been cleaned up.
I think initialize by QueueNum makes sense.
Thanks,
Rusty.
next prev parent reply other threads:[~2011-12-18 20:56 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-14 14:55 [Qemu-devel] [RFC 0/4] virtio-mmio transport Peter Maydell
2011-11-14 14:55 ` [Qemu-devel] [RFC 1/4] virtio: Add support for guest setting of queue size Peter Maydell
2011-11-14 14:55 ` [Qemu-devel] [RFC 2/4] virtio: Support transports which can specify the vring alignment Peter Maydell
2011-11-14 14:55 ` [Qemu-devel] [RFC 3/4] Add MMIO based virtio transport Peter Maydell
2011-11-14 14:55 ` [Qemu-devel] [RFC 4/4] hw/vexpress.c: Add MMIO " Peter Maydell
2011-11-14 15:41 ` [Qemu-devel] [RFC 0/4] virtio-mmio transport Stefan Hajnoczi
2011-11-16 14:33 ` Paolo Bonzini
2011-11-16 18:41 ` Peter Maydell
2011-11-16 19:56 ` Anthony Liguori
2011-11-17 11:20 ` Pawel Moll
2011-11-17 11:44 ` Paolo Bonzini
2011-12-09 15:16 ` Paul Brook
2011-12-09 15:57 ` Anthony Liguori
2011-12-12 2:52 ` Paul Brook
2011-12-12 11:16 ` Pawel Moll
2011-12-12 11:16 ` Pawel Moll
2011-12-12 14:45 ` Paul Brook
2011-12-12 14:45 ` Paul Brook
2011-12-12 14:51 ` Pawel Moll
2011-12-12 14:51 ` Pawel Moll
2011-12-16 5:36 ` Rusty Russell
2011-12-16 5:36 ` Rusty Russell [this message]
2011-12-12 12:14 ` Stefan Hajnoczi
2011-12-12 12:28 ` Pawel Moll
2011-12-12 13:12 ` Michael S. Tsirkin
2011-12-12 13:19 ` Pawel Moll
2011-12-12 15:11 ` Stefan Hajnoczi
2011-12-12 15:18 ` Peter Maydell
2011-12-12 15:21 ` Pawel Moll
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