STRUCT SEV_USER_DATA_SNP_CONFIG(9)

💖 NAME 💖

struct sev_user_data_snp_config — okay bestie, this is the system wide configuration value for SNP. Yes, the whole system. Main character struct energy, no cap 👑

This page lives in the Kernel API Manual, and honestly? It's giving "small struct, big responsibilities" ✨

🦋 SYNOPSIS 🦋

struct sev_user_data_snp_config {
    __u64 reported_tcb  ;
    __u32 mask_chip_id:1;
    __u32 mask_chip_key:1;
    __u32 rsvd:30;
    __u8 rsvd1[52];
 };

Look at her. Not a single wasted byte, literally. The bitfields are chef's kiss 💅

🌸 Members 🌸

Okay so let's meet the cast, one member at a time 🫶

• reported_tcb — this is the TCB version that gets reported in the guest attestation report. It's a __u64, so it's got room, and it's out here representing your whole trustworthiness. Iconic of her, honestly 💜
• mask_chip_id — a 1-bit field answering the question: is the chip id present in attestation reports, or not? Two moods only, bestie — it's a yes/no icon 🎀
• mask_chip_key — another 1-bit cutie, and it tells you whether attestation reports are signed or not. Also just two options. Lowkey minimal, highkey important 🔥
• rsvd — reserved. That's it. That's the whole lore. Don't touch it, it's not for you 🙈 (it's :30 bits wide, if you were curious — the three bitfields above add up to 32 total, math ate 💀)
• rsvd1 — also reserved. This one's a __u8[52], so it's the big roomy reserved array. Still reserved. Still not yours. Respect the padding bestie ⭐

Fr fr — reserved means reserved. Do not go inventing your own meaning for these bytes. Future-you (and future-kernel) will not thank you 😭

🌈 SEE ALSO 🌈

Kernel file ./include/uapi/linux/psp-sev.h struct — that's the home base, go say hi 🏠

The whole squad, in the exact order the page lists them:

• struct sev_user_data_status(9)
• struct sev_user_data_pek_csr(9)
• struct sev_user_data_pdh_cert_export(9)
• struct sev_user_data_get_id(9)
• struct sev_user_data_get_id2(9)
• struct sev_user_data_snp_status(9)
• struct sev_issue_cmd(9)

💫 And that's the whole page, bestie — struct read, vibes immaculate, zero bytes harmed. This one came from ./include/uapi/linux, dated October 2026, so mark your calendar and hydrate before you touch any firmware 🍓🧚✨