From: "Michael S. Tsirkin" <mst@redhat.com>
To: qemu-devel@nongnu.org
Cc: "Peter Maydell" <peter.maydell@linaro.org>,
"Zhang Yu" <zhangyu31@baidu.com>,
"Sebastien Boeuf" <sebastien.boeuf@intel.com>,
"Gerd Hoffmann" <kraxel@redhat.com>,
"Stefan Hajnoczi" <stefanha@redhat.com>,
"Marc-André Lureau" <marcandre.lureau@redhat.com>
Subject: [Qemu-devel] [PULL 21/22] libvhost-user: implement VHOST_USER_PROTOCOL_F_MQ
Date: Tue, 2 Jul 2019 11:08:42 -0400 [thread overview]
Message-ID: <20190626074815.19994-4-stefanha@redhat.com> (raw)
Message-ID: <20190702150842.Am-LurmjA_1r66XZOiz3NXGSwMBY7U7rhHQPV44n0Qo@z> (raw)
In-Reply-To: <20190702150606.24851-1-mst@redhat.com>
From: Stefan Hajnoczi <stefanha@redhat.com>
Existing vhost-user device backends, including vhost-user-scsi and
vhost-user-blk, support multiqueue but libvhost-user currently does not
advertise this.
VHOST_USER_PROTOCOL_F_MQ enables the VHOST_USER_GET_QUEUE_NUM request
needed for a vhost-user master to query the number of queues. For
example, QEMU's vhost-user-net master depends on
VHOST_USER_PROTOCOL_F_MQ for multiqueue.
If you're wondering how any device backend with more than one virtqueue
functions today, it's because device types with a fixed number of
virtqueues do not require querying the number of queues. Therefore the
vhost-user master for vhost-user-input with 2 virtqueues, for example,
doesn't actually depend on VHOST_USER_PROTOCOL_F_MQ. It just enables
virtqueues 0 and 1 without asking.
Let there be multiqueue!
Suggested-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20190626074815.19994-4-stefanha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
contrib/libvhost-user/libvhost-user.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/contrib/libvhost-user/libvhost-user.c b/contrib/libvhost-user/libvhost-user.c
index 90bea856dd..4b36e35a82 100644
--- a/contrib/libvhost-user/libvhost-user.c
+++ b/contrib/libvhost-user/libvhost-user.c
@@ -1160,7 +1160,8 @@ vu_set_vring_err_exec(VuDev *dev, VhostUserMsg *vmsg)
static bool
vu_get_protocol_features_exec(VuDev *dev, VhostUserMsg *vmsg)
{
- uint64_t features = 1ULL << VHOST_USER_PROTOCOL_F_LOG_SHMFD |
+ uint64_t features = 1ULL << VHOST_USER_PROTOCOL_F_MQ |
+ 1ULL << VHOST_USER_PROTOCOL_F_LOG_SHMFD |
1ULL << VHOST_USER_PROTOCOL_F_SLAVE_REQ |
1ULL << VHOST_USER_PROTOCOL_F_HOST_NOTIFIER |
1ULL << VHOST_USER_PROTOCOL_F_SLAVE_SEND_FD;
@@ -1200,8 +1201,8 @@ vu_set_protocol_features_exec(VuDev *dev, VhostUserMsg *vmsg)
static bool
vu_get_queue_num_exec(VuDev *dev, VhostUserMsg *vmsg)
{
- DPRINT("Function %s() not implemented yet.\n", __func__);
- return false;
+ vmsg_set_reply_u64(vmsg, dev->max_queues);
+ return true;
}
static bool
--
MST
next prev parent reply other threads:[~2019-07-02 15:57 UTC|newest]
Thread overview: 95+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-26 7:48 [Qemu-devel] [PATCH v2 0/4] libvhost-user: VHOST_USER_PROTOCOL_F_MQ support Stefan Hajnoczi
2019-06-26 7:48 ` [Qemu-devel] [PATCH v2 1/4] libvhost-user: add vmsg_set_reply_u64() helper Stefan Hajnoczi
2019-07-02 15:08 ` [Qemu-devel] [PULL 19/22] " Michael S. Tsirkin
2019-06-26 7:48 ` [Qemu-devel] [PATCH v2 2/4] libvhost-user: support many virtqueues Stefan Hajnoczi
2019-07-02 15:08 ` [Qemu-devel] [PULL 20/22] " Michael S. Tsirkin
2019-06-26 7:48 ` Stefan Hajnoczi [this message]
2019-07-02 15:08 ` [Qemu-devel] [PULL 21/22] libvhost-user: implement VHOST_USER_PROTOCOL_F_MQ Michael S. Tsirkin
2019-06-26 7:48 ` [Qemu-devel] [PATCH v2 4/4] docs: avoid vhost-user-net specifics in multiqueue section Stefan Hajnoczi
2019-07-02 15:08 ` [Qemu-devel] [PULL 22/22] " Michael S. Tsirkin
-- strict thread matches above, loose matches on Subject: below --
2019-07-02 15:06 [Qemu-devel] [PULL 00/22] virtio, pc, pci: features, fixes, cleanups Michael S. Tsirkin
2019-06-25 23:23 ` [Qemu-devel] [PATCH] virtio-pci: fix missing device properties Marc-André Lureau
2019-06-26 1:55 ` Eduardo Habkost
2019-06-26 9:48 ` Marc-André Lureau
2019-06-26 12:39 ` Eduardo Habkost
2019-07-02 15:07 ` [Qemu-devel] [PULL 12/22] " Michael S. Tsirkin
2019-06-28 20:02 ` [Qemu-devel] [PATCH] pc: Move compat_apic_id_mode variable to PCMachineClass Eduardo Habkost
2019-06-29 10:46 ` Philippe Mathieu-Daudé
2019-06-30 21:30 ` Michael S. Tsirkin
2019-07-02 15:08 ` [Qemu-devel] [PULL 18/22] " Michael S. Tsirkin
2019-07-02 15:06 ` [Qemu-devel] [PULL 01/22] pcie: don't skip multi-mask events Michael S. Tsirkin
2019-07-02 15:06 ` [Qemu-devel] [PULL 02/22] pcie: check that slt ctrl changed before deleting Michael S. Tsirkin
2019-07-11 12:31 ` Peter Maydell
2019-07-02 15:06 ` [Qemu-devel] [PULL 03/22] pcie: work around for racy guest init Michael S. Tsirkin
2019-07-02 15:06 ` [Qemu-devel] [PULL 04/22] pcie: minor cleanups for slot control/status Michael S. Tsirkin
2019-07-02 15:56 ` [Qemu-devel] [PULL 00/22] virtio, pc, pci: features, fixes, cleanups Peter Maydell
2019-07-02 17:00 ` Michael S. Tsirkin
2019-07-02 17:20 ` Peter Maydell
2019-07-02 18:22 ` Michael S. Tsirkin
2019-07-02 18:27 ` Peter Maydell
2019-07-02 19:00 ` Michael S. Tsirkin
2019-07-26 12:39 ` Peter Maydell
2019-07-26 13:43 ` Michael S. Tsirkin
2019-07-04 9:25 ` Peter Maydell
2019-07-04 11:03 ` Pankaj Gupta
2019-07-04 21:24 ` Michael S. Tsirkin
2019-07-05 9:37 ` Pankaj Gupta
2019-07-04 21:29 ` Michael S. Tsirkin
2019-07-05 9:47 ` Peter Maydell
2019-06-26 2:31 [Qemu-devel] [PATCH v4 0/5] virtio: fix some issues of "started" and "start_on_kick" flag elohimes
2019-06-26 2:31 ` [Qemu-devel] [PATCH v4 1/5] virtio: add "use-started" property elohimes
2019-06-26 10:17 ` Greg Kurz
2019-06-27 2:20 ` Yongji Xie
2019-07-02 15:07 ` [Qemu-devel] [PULL 13/22] " Michael S. Tsirkin
2019-06-26 2:31 ` [Qemu-devel] [PATCH v4 2/5] virtio: Set "start_on_kick" for legacy devices elohimes
2019-07-02 15:07 ` [Qemu-devel] [PULL 14/22] " Michael S. Tsirkin
2019-06-26 2:31 ` [Qemu-devel] [PATCH v4 3/5] virtio: Set "start_on_kick" on virtio_set_features() elohimes
2019-07-02 15:08 ` [Qemu-devel] [PULL 15/22] " Michael S. Tsirkin
2019-06-26 2:31 ` [Qemu-devel] [PATCH v4 4/5] virtio: Make sure we get correct state of device on handle_aio_output() elohimes
2019-07-02 15:08 ` [Qemu-devel] [PULL 16/22] " Michael S. Tsirkin
2019-06-26 2:31 ` [Qemu-devel] [PATCH v4 5/5] virtio: Don't change "started" flag on virtio_vmstate_change() elohimes
2019-07-02 15:08 ` [Qemu-devel] [PULL 17/22] " Michael S. Tsirkin
2019-06-26 10:43 ` [Qemu-devel] [PATCH v4 0/5] virtio: fix some issues of "started" and "start_on_kick" flag Laurent Vivier
2019-06-27 2:19 ` Yongji Xie
2019-06-19 9:49 [Qemu-devel] [PATCH v2 0/7] Qemu virtio pmem device Pankaj Gupta
2019-06-19 9:49 ` [Qemu-devel] [PATCH v2 1/7] virtio-pmem: add virtio device Pankaj Gupta
2019-07-02 11:46 ` Cornelia Huck
2019-07-02 15:07 ` [Qemu-devel] [PULL 05/22] " Michael S. Tsirkin
2019-07-11 12:57 ` Peter Maydell
2019-07-11 14:05 ` Pankaj Gupta
2019-06-19 9:49 ` [Qemu-devel] [PATCH v2 2/7] virtio-pci: Allow to specify additional interfaces for the base type Pankaj Gupta
2019-07-02 15:07 ` [Qemu-devel] [PULL 06/22] " Michael S. Tsirkin
2019-06-19 9:49 ` [Qemu-devel] [PATCH v2 3/7] virtio-pmem: sync linux headers Pankaj Gupta
2019-07-02 11:50 ` Cornelia Huck
2019-07-02 11:59 ` Pankaj Gupta
2019-07-02 16:58 ` Michael S. Tsirkin
2019-07-02 17:09 ` Pankaj Gupta
2019-07-02 17:11 ` Michael S. Tsirkin
2019-07-02 17:21 ` Pankaj Gupta
2019-07-02 15:10 ` Michael S. Tsirkin
2019-07-02 15:07 ` [Qemu-devel] [PULL 07/22] " Michael S. Tsirkin
2019-06-19 9:49 ` [Qemu-devel] [PATCH v2 4/7] virtio-pci: Proxy for virtio-pmem Pankaj Gupta
2019-07-02 11:55 ` Cornelia Huck
2019-07-02 12:00 ` Pankaj Gupta
2019-07-02 17:09 ` Michael S. Tsirkin
2019-07-02 17:14 ` Pankaj Gupta
2019-07-02 15:07 ` [Qemu-devel] [PULL 08/22] " Michael S. Tsirkin
2019-07-11 12:59 ` Peter Maydell
2019-07-11 13:27 ` Pankaj Gupta
2019-06-19 9:49 ` [Qemu-devel] [PATCH v2 5/7] hmp: Handle virtio-pmem when printing memory device infos Pankaj Gupta
2019-07-02 8:50 ` Wei Yang
2019-07-02 10:17 ` Pankaj Gupta
2019-07-02 15:07 ` [Qemu-devel] [PULL 09/22] " Michael S. Tsirkin
2019-06-19 9:49 ` [Qemu-devel] [PATCH v2 6/7] numa: Handle virtio-pmem in NUMA stats Pankaj Gupta
2019-07-02 15:07 ` [Qemu-devel] [PULL 10/22] " Michael S. Tsirkin
2019-06-19 9:49 ` [Qemu-devel] [PATCH v2 7/7] pc: Support for virtio-pmem-pci Pankaj Gupta
2019-07-02 15:07 ` [Qemu-devel] [PULL 11/22] " Michael S. Tsirkin
2019-07-01 3:53 ` [Qemu-devel] [PATCH v2 0/7] Qemu virtio pmem device Pankaj Gupta
2019-07-02 8:49 ` Wei Yang
2019-07-02 10:07 ` Pankaj Gupta
2019-07-03 0:58 ` Wei Yang
2019-07-03 1:31 ` Pankaj Gupta
2019-07-03 1:57 ` Wei Yang
2019-07-03 2:31 ` Pankaj Gupta
2019-07-03 2:42 ` Wei Yang
2019-07-03 3:21 ` Pankaj Gupta
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