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-rw-r--r--hw/net/igb_core.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/hw/net/igb_core.c b/hw/net/igb_core.c
index 43d23c7621..49d1917926 100644
--- a/hw/net/igb_core.c
+++ b/hw/net/igb_core.c
@@ -659,6 +659,13 @@ igb_process_tx_desc(IGBCore *core,
                 tx->ctx[idx].vlan_macip_lens >> IGB_TX_FLAGS_VLAN_SHIFT,
                 !!(tx->first_cmd_type_len & E1000_TXD_CMD_VLE));
 
+            if ((tx->first_cmd_type_len & E1000_ADVTXD_MAC_TSTAMP) &&
+                (core->mac[TSYNCTXCTL] & E1000_TSYNCTXCTL_ENABLED) &&
+                !(core->mac[TSYNCTXCTL] & E1000_TSYNCTXCTL_VALID)) {
+                core->mac[TSYNCTXCTL] |= E1000_TSYNCTXCTL_VALID;
+                e1000x_timestamp(core->mac, core->timadj, TXSTMPL, TXSTMPH);
+            }
+
             if (igb_tx_pkt_send(core, tx, queue_index)) {
                 igb_on_tx_done_update_stats(core, tx->tx_pkt, queue_index);
             }