tpm2_sessions_init(9)

✨ tpm2_sessions_init ✨

Hey bestie, welcome to the kernel API manual for tpm2_sessions_init — like, the actual start of day initialization for the sessions code 💅. Yes, this is a section 9 (kernel API) page, and yes, it's about TPM chips. Slay.

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🌸 SYNOPSIS 🌸

int tpm2_sessions_init(struct tpm_chip *chip);

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🎀 ARGUMENTS 🎀

• chip — the TPM chip, obviously 🫶. That's the whole argument, bestie, it just wants the chip.

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🦋 DESCRIPTION 🦋

Okay so what this actually does: it derives and context saves the null primary, and allocates memory in the struct tpm_chip for the authorizations. Literally that's it, but it's giving main character energy in the session setup world 👑.

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⭐ RETURN ⭐

Here's the vibe check on what you get back:

• 0 — OK ✨ everything's good, no cap.
• -errno — a system error 😭 it's giving bad news.
• TPM_RC — a TPM error 💀 the TPM itself said nope.

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🌈 SEE ALSO 🌈

Lowkey you should also peek at the kernel file ./drivers/char/tpm/tpm2-sessions.c — that's where the magic lives, iykyk. And these besties right here:

• tpm_buf_append_name(9)
• tpm_buf_append_hmac_session(9)
• tpm_buf_fill_hmac_session(9)
• tpm_buf_check_hmac_response(9)
• tpm2_end_auth_session(9)
• tpm2_start_auth_session(9)
• tpm2_parse_create_primary(9)
• tpm2_create_primary(9)

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Also the ./drivers/char/tpm directory is where this all hangs out, so that's your little home base for the TPM stuff, bestie 🏠💜

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That's the whole page, bestie, you ate that 💅✨. This one's from the Kernel API Manual, dated October 2026, living under ./drivers/char/tpm — go forth and init those sessions fr fr 🎀🦋🌸