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[RFC PATCH 2/3] vdpa: load guest offloads at device start
From: |
Eugenio Pérez |
Subject: |
[RFC PATCH 2/3] vdpa: load guest offloads at device start |
Date: |
Fri, 25 Nov 2022 15:38:58 +0100 |
This allows to migrate them. Save some device's startup time if they are
the default.
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
---
net/vhost-vdpa.c | 31 +++++++++++++++++++++++++++++--
1 file changed, 29 insertions(+), 2 deletions(-)
diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
index 2b4b85d8f8..7ce094bd67 100644
--- a/net/vhost-vdpa.c
+++ b/net/vhost-vdpa.c
@@ -423,6 +423,34 @@ static int vhost_vdpa_net_load_mq(VhostVDPAState *s,
return *s->status != VIRTIO_NET_OK;
}
+static int vhost_vdpa_net_load_offloads(VhostVDPAState *s,
+ const VirtIONet *n)
+{
+ uint64_t features = n->parent_obj.guest_features;
+ uint64_t guest_offloads_mask;
+ ssize_t dev_written;
+
+ if (!n->has_vnet_hdr || !(features & VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) {
+ return 0;
+ }
+
+ if (n->curr_guest_offloads ==
+ virtio_net_guest_offloads_by_features(features)) {
+ return 0;
+ }
+
+ guest_offloads_mask = cpu_to_le64(n->curr_guest_offloads);
+ dev_written = vhost_vdpa_net_load_cmd(s, VIRTIO_NET_CTRL_GUEST_OFFLOADS,
+ VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET,
+ &guest_offloads_mask,
+ sizeof(uint64_t));
+ if (unlikely(dev_written < 0)) {
+ return dev_written;
+ }
+
+ return *s->status != VIRTIO_NET_OK;
+}
+
static int vhost_vdpa_net_load(NetClientState *nc)
{
VhostVDPAState *s = DO_UPCAST(VhostVDPAState, nc, nc);
@@ -445,8 +473,7 @@ static int vhost_vdpa_net_load(NetClientState *nc)
if (unlikely(r)) {
return r;
}
-
- return 0;
+ return vhost_vdpa_net_load_offloads(s, n);
}
static NetClientInfo net_vhost_vdpa_cvq_info = {
--
2.31.1