135 lines
4.2 KiB
Diff
135 lines
4.2 KiB
Diff
From 09bf0febef2512f00e71edca0fcbaf452652c2c7 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Eugenio=20P=C3=A9rez?= <eperezma@redhat.com>
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Date: Thu, 10 Aug 2023 11:27:28 +0200
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Subject: [PATCH 6/7] vdpa: move vhost_vdpa_set_vring_ready to the caller
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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RH-Author: Eugenio Pérez <eperezma@redhat.com>
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RH-MergeRequest: 199: CVQ migration support
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RH-Jira: RHEL-923
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RH-Acked-by: Jason Wang <jasowang@redhat.com>
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RH-Acked-by: Cindy Lu <lulu@redhat.com>
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RH-Commit: [6/7] cf4fd1071ca127914c8e8d6aefec451cad97ecc1 (eperezmartin/qemu-kvm)
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Doing that way allows CVQ to be enabled before the dataplane vqs,
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restoring the state as MQ or MAC addresses properly in the case of a
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migration.
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The patch does it by defining a ->load NetClientInfo callback also for
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dataplane. Ideally, this should be done by an independent patch, but
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the function is already static so it would only add an empty
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vhost_vdpa_net_data_load stub.
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Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
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---
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v3:
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* Fix subject typo
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* Expand patch message so it explains why
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---
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hw/virtio/vdpa-dev.c | 3 +++
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hw/virtio/vhost-vdpa.c | 3 ---
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net/vhost-vdpa.c | 41 +++++++++++++++++++++++++++++++----------
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3 files changed, 34 insertions(+), 13 deletions(-)
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diff --git a/hw/virtio/vdpa-dev.c b/hw/virtio/vdpa-dev.c
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index 01b41eb0f1..8c47d643bf 100644
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--- a/hw/virtio/vdpa-dev.c
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+++ b/hw/virtio/vdpa-dev.c
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@@ -256,6 +256,9 @@ static int vhost_vdpa_device_start(VirtIODevice *vdev, Error **errp)
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error_setg_errno(errp, -ret, "Error starting vhost");
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goto err_guest_notifiers;
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}
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+ for (i = 0; i < s->dev.nvqs; ++i) {
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+ vhost_vdpa_set_vring_ready(&s->vdpa, i);
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+ }
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s->started = true;
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/*
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diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c
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index e4d0101327..0d9d311abd 100644
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--- a/hw/virtio/vhost-vdpa.c
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+++ b/hw/virtio/vhost-vdpa.c
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@@ -1154,9 +1154,6 @@ static int vhost_vdpa_dev_start(struct vhost_dev *dev, bool started)
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if (unlikely(!ok)) {
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return -1;
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}
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- for (int i = 0; i < dev->nvqs; ++i) {
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- vhost_vdpa_set_vring_ready(v, dev->vq_index + i);
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- }
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} else {
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vhost_vdpa_suspend(dev);
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vhost_vdpa_svqs_stop(dev);
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diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
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index a1b16bbc52..47b87bf80d 100644
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--- a/net/vhost-vdpa.c
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+++ b/net/vhost-vdpa.c
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@@ -344,6 +344,22 @@ static int vhost_vdpa_net_data_start(NetClientState *nc)
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return 0;
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}
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+static int vhost_vdpa_net_data_load(NetClientState *nc)
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+{
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+ VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc);
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+ struct vhost_vdpa *v = &s->vhost_vdpa;
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+ bool has_cvq = v->dev->vq_index_end % 2;
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+
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+ if (has_cvq) {
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+ return 0;
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+ }
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+
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+ for (int i = 0; i < v->dev->nvqs; ++i) {
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+ vhost_vdpa_set_vring_ready(v, i + v->dev->vq_index);
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+ }
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+ return 0;
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+}
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+
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static void vhost_vdpa_net_client_stop(NetClientState *nc)
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{
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VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc);
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@@ -366,6 +382,7 @@ static NetClientInfo net_vhost_vdpa_info = {
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.size = sizeof(VhostVDPAState),
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.receive = vhost_vdpa_receive,
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.start = vhost_vdpa_net_data_start,
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+ .load = vhost_vdpa_net_data_load,
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.stop = vhost_vdpa_net_client_stop,
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.cleanup = vhost_vdpa_cleanup,
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.has_vnet_hdr = vhost_vdpa_has_vnet_hdr,
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@@ -682,18 +699,22 @@ static int vhost_vdpa_net_cvq_load(NetClientState *nc)
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assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA);
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- if (!v->shadow_vqs_enabled) {
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- return 0;
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- }
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+ vhost_vdpa_set_vring_ready(v, v->dev->vq_index);
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- n = VIRTIO_NET(v->dev->vdev);
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- r = vhost_vdpa_net_load_mac(s, n);
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- if (unlikely(r < 0)) {
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- return r;
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+ if (v->shadow_vqs_enabled) {
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+ n = VIRTIO_NET(v->dev->vdev);
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+ r = vhost_vdpa_net_load_mac(s, n);
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+ if (unlikely(r < 0)) {
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+ return r;
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+ }
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+ r = vhost_vdpa_net_load_mq(s, n);
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+ if (unlikely(r)) {
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+ return r;
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+ }
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}
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- r = vhost_vdpa_net_load_mq(s, n);
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- if (unlikely(r)) {
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- return r;
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+
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+ for (int i = 0; i < v->dev->vq_index; ++i) {
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+ vhost_vdpa_set_vring_ready(v, i);
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}
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return 0;
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--
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2.39.3
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