optee_smc_do_call_with_arg(9)

📦 version 7.3.1, in nixpkgs unstable

👑 optee_smc_do_call_with_arg — NAME energy ✨

Okay bestie, welcome to optee_smc_do_call_with_arg(9), straight out of the Kernel API Manual 💅 this one's the whole vibe: Do an SMC to OP-TEE in secure world. Like, it literally goes and knocks on secure world's door for you. Iconic behavior honestly 🫶

✨ SYNOPSIS ✨

int optee_smc_do_call_with_arg (struct tee_context *ctx , struct tee_shm
*shm , u_int offs , bool system_thread );

Yeah she takes four args. Don't panic, we're gonna go through every single one 🎀

🌸 ARGUMENTS 🌸

  • ctx — the calling context, aka who's calling, aka the main character of this call 🫶
  • shm — the shared memory holding the message you're passing to secure world. This is the little envelope 💌
  • offs — the offset of the message in shm. Not the whole thing, just where it starts. Precision queen ✨
  • system_thread — true if the caller requests TEE system thread support. So if you're like "yes bestie I want that", you set it to true 🔥

💖 DESCRIPTION 💖

So what actually happens? This function does an SMC to OP-TEE in secure world, and it also handles any eventual resulting Remote Procedure Calls (RPC) coming back from OP-TEE. Like, it makes the call AND deals with the callback chaos that follows. Multitasking icon 💅

It returns the return code from secure world, and heads up: 0 is OK ✅ ngl that's the number you wanna see. Anything else? Vibe check failed, bestie 😭

🦋 SEE ALSO 🦋

Kernel file ./drivers/tee/optee/smc_abi.c — go read her, she's the source of truth 📖 and also these absolute legends:

That's the whole squad, no cap 🌈💜

💀 tiny heads up: this page lives in ./drivers/tee/optee and it's dated October 2026 — yes, the future, we're ahead of schedule and thriving 🧚

Anyway, that's the page, bestie. Go forth and SMC responsibly. Slay 💅✨🍓

📦 where this page comes from