From: Anthony Liguori <anthony@codemonkey.ws>
To: Amit Shah <amit.shah@redhat.com>
Cc: qemu list <qemu-devel@nongnu.org>, Juan Quintela <quintela@redhat.com>
Subject: [Qemu-devel] Re: [PATCH v6 05/18] virtio-serial: Use control messages to notify guest of new ports
Date: Wed, 28 Apr 2010 08:26:25 -0500 [thread overview]
Message-ID: <4BD83781.80907@codemonkey.ws> (raw)
In-Reply-To: <20100428042749.GA27314@amit-x200.redhat.com>
On 04/27/2010 11:27 PM, Amit Shah wrote:
> On (Tue) Apr 27 2010 [12:37:00], Anthony Liguori wrote:
>
>> On 04/27/2010 07:33 AM, Amit Shah wrote:
>>
>>> Allow the port 'id's to be set by a user on the command line. This is
>>> needed by management apps that will want a stable port numbering scheme
>>> for hot-plug/unplug and migration.
>>>
>>> Since the port numbers are shared with the guest (to identify ports in
>>> control messages), we just send a control message to the guest
>>> indicating addition of new ports (hot-plug) or notifying the guest of
>>> the available ports when the guest sends us a DEVICE_READY control
>>> message.
>>>
>>> Signed-off-by: Amit Shah<amit.shah@redhat.com>
>>>
>>>
>> If you're introducing a new message type, don't you need to negotiate
>> that feature with the guest?
>>
> Since we didn't have any kernel or qemu released with the older ABI,
> changing the numbers isn't a bad thing (we disabled multiport support
> for 2.6.34 because of this).
>
Ok.
Regards,
Anthony Liguori
> Amit
>
next prev parent reply other threads:[~2010-04-28 13:26 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-27 12:33 [Qemu-devel] [PATCH v6 00/18] PULL: virtio-serial fixes Amit Shah
2010-04-27 12:33 ` [Qemu-devel] [PATCH v6 01/18] virtio-serial: save/load: Ensure target has enough ports Amit Shah
2010-04-27 12:33 ` [Qemu-devel] [PATCH v6 02/18] virtio-serial: save/load: Ensure nr_ports on src and dest are same Amit Shah
2010-04-27 12:33 ` [Qemu-devel] [PATCH v6 03/18] virtio-serial: save/load: Ensure we have hot-plugged ports instantiated Amit Shah
2010-04-27 12:33 ` [Qemu-devel] [PATCH v6 04/18] virtio-serial: save/load: Send target host connection status if different Amit Shah
2010-04-27 12:33 ` [Qemu-devel] [PATCH v6 05/18] virtio-serial: Use control messages to notify guest of new ports Amit Shah
2010-04-27 12:34 ` [Qemu-devel] [PATCH v6 06/18] virtio-serial: whitespace: match surrounding code Amit Shah
2010-04-27 12:34 ` [Qemu-devel] [PATCH v6 07/18] virtio-serial: Remove redundant check for 0-sized write request Amit Shah
2010-04-27 12:34 ` [Qemu-devel] [PATCH v6 08/18] virtio-serial: Update copyright year to 2010 Amit Shah
2010-04-27 12:34 ` [Qemu-devel] [PATCH v6 09/18] virtio-serial: Propagate errors in initialising ports / devices in guest Amit Shah
2010-04-27 12:34 ` [Qemu-devel] [PATCH v6 10/18] virtio-serial: Send out guest data to ports only if port is opened Amit Shah
2010-04-27 12:34 ` [Qemu-devel] [PATCH v6 11/18] iov: Introduce a new file for helpers around iovs, add iov_from_buf() Amit Shah
2010-04-27 12:34 ` [Qemu-devel] [PATCH v6 12/18] iov: Add iov_to_buf and iov_size helpers Amit Shah
2010-04-27 12:34 ` [Qemu-devel] [PATCH v6 13/18] virtio-serial: Handle scatter-gather buffers for control messages Amit Shah
2010-04-27 12:34 ` [Qemu-devel] [PATCH v6 14/18] virtio-serial: Handle scatter/gather input from the guest Amit Shah
2010-04-27 12:34 ` [Qemu-devel] [PATCH v6 15/18] virtio-serial: Apps should consume all data that guest sends out / Fix virtio api abuse Amit Shah
2010-04-27 12:34 ` [Qemu-devel] [PATCH v6 16/18] virtio-serial: Discard data that guest sends us when ports aren't connected Amit Shah
2010-04-27 12:34 ` [Qemu-devel] [PATCH v6 17/18] virtio-serial: Implement flow control for individual ports Amit Shah
2010-04-27 12:34 ` [Qemu-devel] [PATCH v6 18/18] virtio-serial-bus: wake up iothread upon guest read notification Amit Shah
2010-04-27 17:41 ` [Qemu-devel] " Anthony Liguori
2010-04-27 17:58 ` Marcelo Tosatti
2010-04-27 18:13 ` Anthony Liguori
2010-04-28 7:29 ` Amit Shah
2010-04-28 13:25 ` Anthony Liguori
2010-04-28 16:34 ` Amit Shah
2010-04-27 17:37 ` [Qemu-devel] Re: [PATCH v6 05/18] virtio-serial: Use control messages to notify guest of new ports Anthony Liguori
2010-04-28 4:27 ` Amit Shah
2010-04-28 13:26 ` Anthony Liguori [this message]
2010-04-28 17:54 ` [Qemu-devel] Re: [PATCH v6 01/18] virtio-serial: save/load: Ensure target has enough ports Anthony Liguori
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