tpm2_do_selftest(9)

📦 version 7.3.1, in nixpkgs unstable

💖 tpm2_do_selftest(9) 💖

okay so this is a page from the Kernel API Manual (section 9, bestie, we're in kernel-land now) and it's all about tpm2_do_selftest — the little function that makes sure your TPM actually did its homework before anyone trusts it. let's get into it 🫶

✨ NAME ✨

tpm2_do_selftest — literally just making sure every self test has passed. that's it. that's the vibe check. 💅

🌸 SYNOPSIS 🌸

int tpm2_do_selftest (struct tpm_chip *chip );

like, one argument, returns an int. minimal. iconic. no notes. ✨

🎀 ARGUMENTS 🎀

  • chip — the TPM chip you're working with. that's the one, bestie. 💖

🦋 RETURN 🦋

Same as with tpm_transmit_cmd. (yep, that's the whole thing — it just passes the result along, no extra drama 🌈)

🔥 DESCRIPTION 🔥

so here's the situation. your TPM has two whole modes for running its self tests and honestly both are valid:

  • it can run all the self tests synchronously and then hand you back RC_SUCCESS once every last test came back successful 😌✨
  • or it can choose to run those tests asynchronously and immediately return RC_TESTING while the self tests are still executing in the background 👀

and this function? this function handles both cases, no cap. it waits until all the tests have completed, so you don't have to sit there refreshing like it's a group chat. main character energy honestly. 💜

👑 SEE ALSO 👑

kernel file ./drivers/char/tpm/tpm2-cmd.c, plus the whole friend group:

ngl, if you're reading a section 9 manpage you're already kind of a legend. drink some water. 🍓

and that's the whole page!! mwah 💋 — this one lives in ./drivers/char/tpm and it's stamped October 2026, so like, future-coded of it. see u in the next manpage bestie 🧚‍♀️💖🌸

📦 where this page comes from