spu_no_incr_hash(9)

💅 spu_no_incr_hash(9) — from the Kernel API Manual bestie

okay so this is a kernel function, and honestly? it's giving "one job, does it well" energy. it lives in the kernel API manual and it's here to answer exactly one question: is incremental hashing supported or not. that's it. that's the whole vibe. 🎀

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🌸 NAME 🌸

spu_no_incr_hash — literally just tells you whether incremental hashing is supported. that's the assignment and it understood it. ✨

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🦋 SYNOPSIS 🦋

bool spu_no_incr_hash (struct iproc_ctx_s *ctx );

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💖 ARGUMENTS 💖

• ctx — the crypto session context 🫶 that's it, that's the only thing you pass in.

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✨ DESCRIPTION ✨

so here's the tea, bestie: SPU-2 does not support incremental hashing. nope, not a thing, not happening. 😭 and the manpage is very honest about it — there's a whole note saying we'll have to revisit this and condition on chip revision or device tree entry if future versions do support incremental hash. so like… watch this space, iykyk. 👀

also SPU-M doesn't support incremental hashing of AES-XCBC. not that either. sorry babes. 💀

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👑 RETURN 👑

• true — incremental hashing is not supported 🙈
• false — otherwise

mind the double negative, bestie, it's literally the entire point of the function name. true means "no incr hash", periodt. ✨

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🔥 SEE ALSO 🔥

the kernel file you wanna peek at is ./drivers/crypto/bcm/cipher.c — and here's the whole friend group, all in one go:

• select_channel(9)
• spu_skcipher_rx_sg_create(9)
• spu_skcipher_tx_sg_create(9)
• handle_skcipher_req(9)
• handle_skcipher_resp(9)
• spu_ahash_rx_sg_create(9)
• spu_ahash_tx_sg_create(9)
• handle_ahash_req(9)
• spu_hmac_outer_hash(9)
• ahash_req_done(9)
• handle_ahash_resp(9)
• spu_aead_rx_sg_create(9)
• spu_aead_tx_sg_create(9)
• handle_aead_req(9)
• handle_aead_resp(9)
• spu_chunk_cleanup(9)
• finish_req(9)
• spu_rx_callback(9)
• skcipher_enqueue(9)
• aead_gcm_esp_setkey(9)
• rfc4543_gcm_esp_setkey(9)
• aead_ccm_esp_setkey(9)
• spu_functions_register(9)
• spu_mb_init(9)

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ngl this one's a short read, but it's iconic in its own lowkey way. go read the whole squad up there if you want the full picture. 💅

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and that's a wrap, bestie!! this page came from ./drivers/crypto/bcm, dated October 2026 — mwah, slay, go call spu_no_incr_hash(9) responsibly 🌈⭐💜