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[PATCH v3 5/6] vdpa: Add vhost_vdpa_net_load_offloads()
From: |
Hawkins Jiawei |
Subject: |
[PATCH v3 5/6] vdpa: Add vhost_vdpa_net_load_offloads() |
Date: |
Thu, 1 Jun 2023 21:48:24 +0800 |
This patch introduces vhost_vdpa_net_load_offloads() to
restore offloads state at device's startup.
Signed-off-by: Hawkins Jiawei <yin31149@gmail.com>
---
net/vhost-vdpa.c | 38 ++++++++++++++++++++++++++++++++++++++
1 file changed, 38 insertions(+)
diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
index e907a3c792..0e647886d1 100644
--- a/net/vhost-vdpa.c
+++ b/net/vhost-vdpa.c
@@ -678,6 +678,40 @@ 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 offloads;
+ ssize_t dev_written;
+
+ if (!virtio_vdev_has_feature(&n->parent_obj,
+ VIRTIO_NET_F_CTRL_GUEST_OFFLOADS)) {
+ return 0;
+ }
+
+ offloads = cpu_to_le64(n->curr_guest_offloads);
+
+ if (offloads == virtio_net_supported_guest_offloads(n)) {
+ /*
+ * According to VirtIO standard, "Upon feature negotiation
+ * corresponding offload gets enabled to preserve
+ * backward compatibility."
+ * So we do not need to send this CVQ command if the guest
+ * also enables all supported offloads.
+ */
+ return 0;
+ }
+
+ dev_written = vhost_vdpa_net_load_cmd(s, VIRTIO_NET_CTRL_GUEST_OFFLOADS,
+ VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET,
+ &offloads, sizeof(offloads));
+ 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);
@@ -700,6 +734,10 @@ static int vhost_vdpa_net_load(NetClientState *nc)
if (unlikely(r)) {
return r;
}
+ r = vhost_vdpa_net_load_offloads(s, n);
+ if (unlikely(r)) {
+ return r;
+ }
return 0;
}
--
2.25.1
- [PATCH v3 0/6] Vhost-vdpa Shadow Virtqueue Offloads support, Hawkins Jiawei, 2023/06/01
- [PATCH v3 1/6] include/hw/virtio: make some VirtIODevice const, Hawkins Jiawei, 2023/06/01
- [PATCH v3 2/6] vdpa: reuse virtio_vdev_has_feature(), Hawkins Jiawei, 2023/06/01
- [PATCH v3 3/6] hw/net/virtio-net: make some VirtIONet const, Hawkins Jiawei, 2023/06/01
- [PATCH v3 4/6] virtio-net: expose virtio_net_supported_guest_offloads(), Hawkins Jiawei, 2023/06/01
- [PATCH v3 5/6] vdpa: Add vhost_vdpa_net_load_offloads(),
Hawkins Jiawei <=
- [PATCH v3 6/6] vdpa: Allow VIRTIO_NET_F_CTRL_GUEST_OFFLOADS in SVQ, Hawkins Jiawei, 2023/06/01
- Re: [PATCH v3 0/6] Vhost-vdpa Shadow Virtqueue Offloads support, Lei Yang, 2023/06/02