spum_hash_type(9)

hey bestie 💖 you're reading spum_hash_type(9) from the Kernel API Manual, and it's giving "tiny helper, big main character energy" ✨.

✨ NAME ✨

spum_hash_type — Determine the type of hash operation. periodt 💅

🌸 SYNOPSIS 🌸

enum hash_type spum_hash_type (u32 src_sent );

💖 ARGUMENTS 💖

• src_sent — the number of bytes in the current request that have already been sent to the SPU to be hashed 🫶.

🦋 DESCRIPTION 🦋

okay so here's the tea ☕: we do not use HASH_TYPE_FULL for requests that fit in a single SPU message. Using FULL causes failures (such as when the string to be hashed is empty) 😭. For similar reasons, we never use HASH_TYPE_FIN. Instead, submit messages as INIT or UPDT and do the hash padding in sw ✨.

👑 SEE ALSO 👑

Kernel file ./drivers/crypto/bcm/spu.c — plus these iconic refs, iykyk:

• spum_ns2_ctx_max_payload(9)
• spum_nsp_ctx_max_payload(9)
• spum_response_hdr_len(9)
• spum_hash_pad_len(9)
• spum_gcm_ccm_pad_len(9)
• spum_assoc_resp_len(9)
• spum_aead_ivlen(9)
• spum_digest_size(9)
• spum_create_request(9)
• spum_cipher_req_init(9)
• spum_cipher_req_finish(9)
• spum_request_pad(9)
• spum_xts_tweak_in_payload(9)
• spum_tx_status_len(9)
• spum_rx_status_len(9)
• spum_status_process(9)
• spum_ccm_update_iv(9)
• spum_wordalign_padlen(9)

okay bye bestie 🫶 — this page is from source/version ./drivers/crypto/bcm, dated October 2026 💅.