STRUCT VIRTCHNL2_RSS_HASH(9)

🌸 NAME 🌸

okay so this page is from the Kernel API Manual, and it's all about struct virtchnl2_rss_hash — RSS hash info. literally that's it. that's the name. 💅

🦋 SYNOPSIS 🦋

struct virtchnl2_rss_hash {
    __le64 ptype_groups;
    __le32 vport_id;
    u8 pad[4];
 };

wait bestie, look at that closing brace, it's got a little space before it. iconic. anyway, that's the struct in all its glory. ✨

🎀 Members 🎀

• ptype_groups — the packet type groups bitmap. think of it as the full menu of traffic types, and each bit says "yep, hash this one" or "nah". 🍓
• vport_id — the vport id. which virtual port we're talking about. main character energy. 👑
• pad — padding for future extensions. it's just there to keep things aligned and give future features some room to slay. no cap. 💅

💖 Description 💖

okay so picture this: the PF (physical function) sends these messages to get and set the hash filter enable bits for RSS. by default, the CP (control plane) sets these to every single traffic type that the hardware supports. the PF can query this value if it wants to change which traffic types get hashed by the hardware. but here's the catch: it's only supported if both the PF and CP drivers set the VIRTCHNL2_CAP_RSS bit during configuration negotiation. no bit, no dice. periodt. 💀

this struct is associated with VIRTCHNL2_OP_GET_RSS_HASH and VIRTCHNL2_OP_SET_RSS_HASH. so if you see those ops, you know this struct is in the group chat. 🫶

🌈 SEE ALSO 🌈

• Kernel file ./include/linux/net/intel/virtchnl2.h
• enum virtchnl2_vport_type(9)
• enum virtchnl2_queue_model(9)
• enum virtchnl2_action_types(9)
• enum virtchnl2_txq_sched_mode(9)
• enum virtchnl2_rxq_flags(9)
• enum virtchnl2_mac_addr_type(9)
• struct virtchnl2_edt_caps(9)
• struct virtchnl2_version_info(9)
• struct virtchnl2_get_capabilities(9)
• struct virtchnl2_queue_reg_chunk(9)
• struct virtchnl2_queue_reg_chunks(9)
• enum virtchnl2_vport_flags(9)
• struct virtchnl2_create_vport(9)
• struct virtchnl2_vport(9)
• struct virtchnl2_txq_info(9)
• struct virtchnl2_config_tx_queues(9)
• struct virtchnl2_rxq_info(9)
• struct virtchnl2_config_rx_queues(9)
• struct virtchnl2_add_queues(9)
• struct virtchnl2_vector_chunk(9)
• struct virtchnl2_vector_chunks(9)
• struct virtchnl2_alloc_vectors(9)
• struct virtchnl2_rss_lut(9)
• struct virtchnl2_sriov_vfs_info(9)
• struct virtchnl2_ptype(9)
• struct virtchnl2_get_ptype_info(9)
• struct virtchnl2_vport_stats(9)
• struct virtchnl2_event(9)
• struct virtchnl2_rss_key(9)
• struct virtchnl2_queue_chunk(9)
• struct virtchnl2_del_ena_dis_queues(9)
• struct virtchnl2_queue_vector(9)
• struct virtchnl2_queue_vector_maps(9)
• struct virtchnl2_loopback(9)
• struct virtchnl2_mac_addr_list(9)
• struct virtchnl2_promisc_info(9)
• enum virtchnl2_ptp_caps(9)
• struct virtchnl2_ptp_clk_reg_offsets(9)
• struct virtchnl2_ptp_cross_time_reg_offsets(9)
• struct virtchnl2_ptp_clk_adj_reg_offsets(9)
• struct virtchnl2_ptp_tx_tstamp_latch_caps(9)
• struct virtchnl2_ptp_get_vport_tx_tstamp_caps(9)
• struct virtchnl2_ptp_get_caps(9)
• struct virtchnl2_ptp_tx_tstamp_latch(9)
• struct virtchnl2_ptp_get_vport_tx_tstamp_latches(9)
• struct virtchnl2_ptp_get_dev_clk_time(9)
• struct virtchnl2_ptp_get_cross_time(9)
• struct virtchnl2_ptp_set_dev_clk_time(9)
• struct virtchnl2_ptp_adj_dev_clk_fine(9)
• struct virtchnl2_ptp_adj_dev_clk_time(9)
• struct virtchnl2_mem_region(9)
• struct virtchnl2_get_lan_memory_regions(9)
• struct virtchnl2_proto_hdr(9)
• struct virtchnl2_proto_hdrs(9)
• struct virtchnl2_rule_action(9)
• struct virtchnl2_rule_action_set(9)
• struct virtchnl2_flow_rule(9)
• struct virtchnl2_flow_rule_info(9)
• struct virtchnl2_flow_rule_add_del(9)

big shoutout to the source at ./include/linux/net/intel, and this page is dated October 2026. bestie, you're all caught up! 💖✨