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88 lines
2.9 KiB
88 lines
2.9 KiB
2 years ago
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From e1f9986cf77e4b2f16aca7b2523bc75bae0c4d3c 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: Tue, 23 Aug 2022 20:30:36 +0200
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Subject: [PATCH 21/23] vdpa: Add virtio-net mac address via CVQ at start
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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: 116: vdpa: Restore device state on destination
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RH-Bugzilla: 2114060
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RH-Acked-by: Cindy Lu <lulu@redhat.com>
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RH-Acked-by: Miroslav Rezanina <mrezanin@redhat.com>
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RH-Commit: [20/21] a7920816d5faf7a0cfbb7c2731a48ddfc456b8d4 (eperezmartin/qemu-kvm)
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Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2114060
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Upstream status: git@github.com:jasowang/qemu.git net-next
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This is needed so the destination vdpa device see the same state a the
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guest set in the source.
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Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
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Acked-by: Jason Wang <jasowang@redhat.com>
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Signed-off-by: Jason Wang <jasowang@redhat.com>
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(cherry picked from commit f34cd09b13855657a0d49c5ea6a1e37ba9dc2334)
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---
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net/vhost-vdpa.c | 40 ++++++++++++++++++++++++++++++++++++++++
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1 file changed, 40 insertions(+)
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diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
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index f09f044ec1..79ebda7de1 100644
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--- a/net/vhost-vdpa.c
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+++ b/net/vhost-vdpa.c
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@@ -363,11 +363,51 @@ static ssize_t vhost_vdpa_net_cvq_add(VhostVDPAState *s, size_t out_len,
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return vhost_svq_poll(svq);
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}
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+static int vhost_vdpa_net_load(NetClientState *nc)
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+{
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+ VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc);
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+ const struct vhost_vdpa *v = &s->vhost_vdpa;
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+ const VirtIONet *n;
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+ uint64_t features;
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+
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+ assert(nc->info->type == NET_CLIENT_DRIVER_VHOST_VDPA);
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+
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+ if (!v->shadow_vqs_enabled) {
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+ return 0;
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+ }
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+
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+ n = VIRTIO_NET(v->dev->vdev);
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+ features = n->parent_obj.guest_features;
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+ if (features & BIT_ULL(VIRTIO_NET_F_CTRL_MAC_ADDR)) {
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+ const struct virtio_net_ctrl_hdr ctrl = {
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+ .class = VIRTIO_NET_CTRL_MAC,
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+ .cmd = VIRTIO_NET_CTRL_MAC_ADDR_SET,
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+ };
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+ char *cursor = s->cvq_cmd_out_buffer;
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+ ssize_t dev_written;
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+
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+ memcpy(cursor, &ctrl, sizeof(ctrl));
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+ cursor += sizeof(ctrl);
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+ memcpy(cursor, n->mac, sizeof(n->mac));
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+
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+ dev_written = vhost_vdpa_net_cvq_add(s, sizeof(ctrl) + sizeof(n->mac),
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+ sizeof(virtio_net_ctrl_ack));
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+ if (unlikely(dev_written < 0)) {
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+ return dev_written;
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+ }
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+
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+ return *((virtio_net_ctrl_ack *)s->cvq_cmd_in_buffer) != VIRTIO_NET_OK;
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+ }
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+
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+ return 0;
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+}
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+
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static NetClientInfo net_vhost_vdpa_cvq_info = {
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.type = NET_CLIENT_DRIVER_VHOST_VDPA,
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.size = sizeof(VhostVDPAState),
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.receive = vhost_vdpa_receive,
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.start = vhost_vdpa_net_cvq_start,
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+ .load = vhost_vdpa_net_load,
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.stop = vhost_vdpa_net_cvq_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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--
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2.31.1
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