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[RFC v3 04/29] vhost: Add x-vhost-enable-shadow-vq qmp
From: |
Eugenio Pérez |
Subject: |
[RFC v3 04/29] vhost: Add x-vhost-enable-shadow-vq qmp |
Date: |
Wed, 19 May 2021 18:28:38 +0200 |
Command to enable shadow virtqueue looks like:
{ "execute": "x-vhost-enable-shadow-vq",
"arguments": { "name": "dev0", "enable": true } }
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
---
qapi/net.json | 22 ++++++++++++++++++++++
hw/virtio/vhost.c | 6 ++++++
2 files changed, 28 insertions(+)
diff --git a/qapi/net.json b/qapi/net.json
index c31748c87f..660feafdd2 100644
--- a/qapi/net.json
+++ b/qapi/net.json
@@ -77,6 +77,28 @@
##
{ 'command': 'netdev_del', 'data': {'id': 'str'} }
+##
+# @x-vhost-enable-shadow-vq:
+#
+# Use vhost shadow virtqueue.
+#
+# @name: the device name of the VirtIO device
+#
+# @enable: true to use he alternate shadow VQ notification path
+#
+# Returns: Error if failure, or 'no error' for success. Not found if vhost is
not enabled.
+#
+# Since: 6.1
+#
+# Example:
+#
+# -> { "execute": "x-vhost-enable-shadow-vq", "arguments": { "name":
"virtio-net", "enable": false } }
+#
+##
+{ 'command': 'x-vhost-enable-shadow-vq',
+ 'data': {'name': 'str', 'enable': 'bool'},
+ 'if': 'defined(CONFIG_VHOST_KERNEL)' }
+
##
# @NetLegacyNicOptions:
#
diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c
index 40f9f64ebd..c4c1f80661 100644
--- a/hw/virtio/vhost.c
+++ b/hw/virtio/vhost.c
@@ -15,6 +15,7 @@
#include "qemu/osdep.h"
#include "qapi/error.h"
+#include "qapi/qapi-commands-net.h"
#include "hw/virtio/vhost.h"
#include "qemu/atomic.h"
#include "qemu/range.h"
@@ -1831,3 +1832,8 @@ int vhost_net_set_backend(struct vhost_dev *hdev,
return -1;
}
+
+void qmp_x_vhost_enable_shadow_vq(const char *name, bool enable, Error **errp)
+{
+ error_setg(errp, "Shadow virtqueue still not implemented");
+}
--
2.27.0
- [RFC v3 00/29] vDPA software assisted live migration, Eugenio Pérez, 2021/05/19
- [RFC v3 01/29] virtio: Add virtio_queue_is_host_notifier_enabled, Eugenio Pérez, 2021/05/19
- [RFC v3 02/29] vhost: Save masked_notifier state, Eugenio Pérez, 2021/05/19
- [RFC v3 03/29] vhost: Add VhostShadowVirtqueue, Eugenio Pérez, 2021/05/19
- [RFC v3 05/29] virtio: Add VIRTIO_F_QUEUE_STATE, Eugenio Pérez, 2021/05/19
- [RFC v3 04/29] vhost: Add x-vhost-enable-shadow-vq qmp,
Eugenio Pérez <=
- [RFC v3 06/29] virtio-net: Honor VIRTIO_CONFIG_S_DEVICE_STOPPED, Eugenio Pérez, 2021/05/19
- [RFC v3 07/29] vhost: Route guest->host notification through shadow virtqueue, Eugenio Pérez, 2021/05/19
- [RFC v3 08/29] vhost: Route host->guest notification through shadow virtqueue, Eugenio Pérez, 2021/05/19
- [RFC v3 09/29] vhost: Avoid re-set masked notifier in shadow vq, Eugenio Pérez, 2021/05/19
- [RFC v3 10/29] virtio: Add vhost_shadow_vq_get_vring_addr, Eugenio Pérez, 2021/05/19
- [RFC v3 11/29] vhost: Add vhost_vring_pause operation, Eugenio Pérez, 2021/05/19