STRUCT DBC_USER_PARAM(9)

💖 struct dbc_user_param(9) 💖

okay bestie, welcome to the Kernel API Manual page for struct dbc_user_param(9) — the little struct handling parameter exchange, and yes it’s both input and output. it’s giving “middle of the convo” energy, and honestly? iconic. 🫶

🌸 NAME 🌸

struct dbc_user_param — parameter exchange structure (input/output). no cap, that’s the whole vibe: it’s the structure used for exchanging parameters, with input and output roles in the mix. ✨

✨ SYNOPSIS ✨

struct dbc_user_param {
    __u32 msg_index;
    __u32 param;
    __u8 signature[DBC_SIG_SIZE];
 };

🎀 Members 🎀

• msg_index — the message that says which parameter to set or get (input). it’s the “what are we even doing here” field, lowkey.
• param — a 4 byte parameter; the units are message specific. (input/output) so yeah, it can go both ways, main character energy.
• signature — a 32 byte signature. 💅
  • When sending a message this is to be created by software using a previous nonce (input). iykyk.
  • For interpreting results, this signature is updated by the PSP to allow software to validate the authenticity of the results. slay — that’s the authenticity check doing its thing. 🔥

🦋 SEE ALSO 🦋

• Kernel file ./include/uapi/linux/psp-dbc.h
• AMD Dynamic Boost Control (DBC) interface(9)
• struct dbc_user_nonce(9)
• struct dbc_user_setuid(9)
• DBCIOCNONCE(9)
• DBCIOCUID(9)
• DBCIOCPARAM(9)
• enum dbc_cmd_msg(9)

mwah 💋 this page came from ./include/uapi/linux, dated October 2026, and it’s the struct dbc_user_param(9) moment — bye bestie, go read the SEE ALSOs 🧚‍♀️🌈