qcom_pas_pr...d_auth_reset(9)

📦 version 7.3.1, in nixpkgs unstable

💅 qcom_pas_prepare_and_auth_reset(9) — a Kernel API Manual moment ✨

okay so bestie, welcome to the Kernel API Manual entry for qcom_pas_pr...d_auth_reset(9) — yes the title is spelled exactly like that, with the little ... in the middle, no I'm not fixing it, that's just her name 💅

🌸 NAME 🌸

qcom_pas_prepare_and_auth_reset — the girlie who prepares, authenticates, and resets the remote processor 🫶

✨ SYNOPSIS ✨

int qcom_pas_prepare_and_auth_reset (struct qcom_pas_context *ctx );

literally that's the whole vibe check: one function, one argument, returns an int 🎀

🦋 ARGUMENTS 🦋

  • ctx — the context, bestie. and not just any context — the one you saved during the call to devm_qcom_pas_context_alloc. don't show up with some random struct, she will know 🙈

👑 DESCRIPTION 👑

so what does she actually do, you ask? she performs the necessary steps to prepare a PAS subsystem, authenticate it using the provided metadata, and initiate a reset sequence. three steps, one function, main character energy fr fr 🔥

you should be using her when Linux is in control setting up the IOMMU hardware for the remote subsystem during secure firmware loading processes. iykyk 💜

let's break the three steps down, because the way that this function is structured?? iconic:

  1. the preparation step — sets up a shmbridge over the firmware memory before TrustZone accesses the firmware memory region for authentication. order matters bestie, we do not skip ahead 🌟
  2. the authentication step — verifies the integrity and authenticity of the firmware or configuration using secure metadata. she's checking receipts, basically 🧚
  3. the reset step — ensures the subsystem starts in a clean and sane state. fresh start, clean slate, new semester energy 🌈
ngl this is a whole little ritual and she's doing it all in one call. obsessed 😭

⭐ RETURN ⭐

  • 0 on success 🎉
  • negative errno on failure 💀

that's it. that's the return. no cap.

🔥 SEE ALSO 🔥

the kernel file, in all her glory:

./drivers/firmware/qcom/qcom_pas.c

and the whole friend group, because she does not function alone:

🫶 tiny sign-off bestie: this page lives in ./drivers/firmware/qcom, she's dated October 2026, and she's filed under qcom_pas_pr...d_auth_reset(9) — same as the title, the ... stays, periodt 💅✨
📦 where this page comes from