STRUCT SEV_DATA_RECEIVE_UPDATE_DATA(9)

💖 NAME 💖

struct sev_data_receive_update_data — bestie, this is the parameters struct for the RECEIVE_UPDATE_DATA command. That's the name reveal: struct sev_data_receive_update_data, and its whole summary is literally “RECEIVE_UPDATE_DATA command parameters.” We're hanging out in the Kernel API Manual, and yes, this is the SEV data struct you were looking for ✨.

✨ SYNOPSIS ✨

okay so the struct is exactly this, no cap:

struct sev_data_receive_update_data {
    u32 handle;
    u32 reserved1;
    u64 hdr_address;
    u32 hdr_len;
    u32 reserved2;
    u64 guest_address;
    u32 guest_len;
    u32 reserved3;
    u64 trans_address;
    u32 trans_len;
};

🎀 Members 🎀

Here's the member-by-member vibe check. The struct also carries reserved1, reserved2, and reserved3, but the Members list doesn't give them their own little blurbs. That's just how the page is set up 💅.

• handle — the handle of the VM you're updating.
• hdr_address — the physical address containing the packet header blob.
• hdr_len — the len of the packet header.
• guest_address — the system physical address of the guest memory region.
• guest_len — the len of the guest memory region.
• trans_address — the system physical address of the transport buffer.
• trans_len — the len of the transport buffer.

🌈 SEE ALSO 🌈

Kernel file ./include/linux/psp-sev.h is the home base, and the whole SEV friend group is here:

• Kernel file ./include/linux/psp-sev.h
• struct sev_data_init(9)
• struct sev_data_init_ex(9)
• struct sev_data_pek_csr(9)
• struct sev_data_download_firmware(9)
• struct sev_data_get_id(9)
• struct sev_data_pdh_cert_export(9)
• struct sev_data_decommission(9)
• struct sev_data_activate(9)
• struct sev_data_deactivate(9)
• struct sev_data_guest_status(9)
• struct sev_data_launch_start(9)
• struct sev_data_launch_update_data(9)
• struct sev_data_launch_update_vmsa(9)
• struct sev_data_launch_measure(9)
• struct sev_data_launch_secret(9)
• struct sev_data_launch_finish(9)
• struct sev_data_send_start(9)
• struct sev_data_send_finish(9)
• struct sev_data_send_cancel(9)
• struct sev_data_receive_start(9)
• struct sev_data_receive_update_vmsa(9)
• struct sev_data_receive_finish(9)
• struct sev_data_dbg(9)
• struct sev_data_attestation_report(9)
• struct sev_data_snp_download_firmware(9)
• struct sev_data_snp_activate(9)
• struct sev_data_snp_addr(9)
• struct sev_data_snp_launch_start(9)
• struct sev_data_snp_launch_update(9)
• struct sev_data_snp_launch_finish(9)
• struct sev_data_snp_guest_status(9)
• struct sev_data_snp_page_reclaim(9)
• struct sev_data_snp_page_unsmash(9)
• struct sev_data_snp_dbg(9)
• struct sev_data_snp_guest_request(9)
• struct sev_data_snp_init_ex(9)
• struct sev_data_range(9)
• struct sev_data_range_list(9)
• struct sev_data_snp_shutdown_ex(9)
• struct sev_platform_init_args(9)
• struct sev_data_snp_commit(9)
• struct sev_data_snp_feature_info(9)
• struct sev_data_snp_verify_mitigation(9)
• struct sev_data_snp_verify_mitigation_dst(9)
• struct sev_snp_tcb_version_genoa_milan(9)
• struct sev_snp_tcb_version_turin(9)
• sev_module_init(9)
• sev_platform_init(9)
• sev_platform_status(9)
• sev_issue_cmd_external_user(9)
• sev_guest_deactivate(9)
• sev_guest_activate(9)
• sev_guest_df_flush(9)
• sev_guest_decommission(9)
• sev_do_cmd(9)

that's the whole page, bestie 🫶. footer deets for the record: source/version is ./include/linux, dated October 2026, and the footer tag is struct sev_..._update_data(9). mwah 💋