From ab8085c130edd65be0d95cc95c28b51c4c6faf9d Mon Sep 17 00:00:00 2001 From: Ard Biesheuvel Date: Wed, 22 Aug 2018 10:51:44 +0200 Subject: crypto: x86 - remove SHA multibuffer routines and mcryptd As it turns out, the AVX2 multibuffer SHA routines are currently broken [0], in a way that would have likely been noticed if this code were in wide use. Since the code is too complicated to be maintained by anyone except the original authors, and since the performance benefits for real-world use cases are debatable to begin with, it is better to drop it entirely for the moment. [0] https://marc.info/?l=linux-crypto-vger&m=153476243825350&w=2 Suggested-by: Eric Biggers Cc: Megha Dey Cc: Tim Chen Cc: Geert Uytterhoeven Cc: Martin Schwidefsky Cc: Heiko Carstens Cc: Thomas Gleixner Cc: Ingo Molnar Signed-off-by: Ard Biesheuvel Signed-off-by: Herbert Xu --- include/crypto/mcryptd.h | 114 ----------------------------------------------- 1 file changed, 114 deletions(-) delete mode 100644 include/crypto/mcryptd.h (limited to 'include/crypto') diff --git a/include/crypto/mcryptd.h b/include/crypto/mcryptd.h deleted file mode 100644 index b67404fc4b34..000000000000 --- a/include/crypto/mcryptd.h +++ /dev/null @@ -1,114 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0 */ -/* - * Software async multibuffer crypto daemon headers - * - * Author: - * Tim Chen - * - * Copyright (c) 2014, Intel Corporation. - */ - -#ifndef _CRYPTO_MCRYPT_H -#define _CRYPTO_MCRYPT_H - -#include -#include -#include - -struct mcryptd_ahash { - struct crypto_ahash base; -}; - -static inline struct mcryptd_ahash *__mcryptd_ahash_cast( - struct crypto_ahash *tfm) -{ - return (struct mcryptd_ahash *)tfm; -} - -struct mcryptd_cpu_queue { - struct crypto_queue queue; - spinlock_t q_lock; - struct work_struct work; -}; - -struct mcryptd_queue { - struct mcryptd_cpu_queue __percpu *cpu_queue; -}; - -struct mcryptd_instance_ctx { - struct crypto_spawn spawn; - struct mcryptd_queue *queue; -}; - -struct mcryptd_hash_ctx { - struct crypto_ahash *child; - struct mcryptd_alg_state *alg_state; -}; - -struct mcryptd_tag { - /* seq number of request */ - unsigned seq_num; - /* arrival time of request */ - unsigned long arrival; - unsigned long expire; - int cpu; -}; - -struct mcryptd_hash_request_ctx { - struct list_head waiter; - crypto_completion_t complete; - struct mcryptd_tag tag; - struct crypto_hash_walk walk; - u8 *out; - int flag; - struct ahash_request areq; -}; - -struct mcryptd_ahash *mcryptd_alloc_ahash(const char *alg_name, - u32 type, u32 mask); -struct crypto_ahash *mcryptd_ahash_child(struct mcryptd_ahash *tfm); -struct ahash_request *mcryptd_ahash_desc(struct ahash_request *req); -void mcryptd_free_ahash(struct mcryptd_ahash *tfm); -void mcryptd_flusher(struct work_struct *work); - -enum mcryptd_req_type { - MCRYPTD_NONE, - MCRYPTD_UPDATE, - MCRYPTD_FINUP, - MCRYPTD_DIGEST, - MCRYPTD_FINAL -}; - -struct mcryptd_alg_cstate { - unsigned long next_flush; - unsigned next_seq_num; - bool flusher_engaged; - struct delayed_work flush; - int cpu; - struct mcryptd_alg_state *alg_state; - void *mgr; - spinlock_t work_lock; - struct list_head work_list; - struct list_head flush_list; -}; - -struct mcryptd_alg_state { - struct mcryptd_alg_cstate __percpu *alg_cstate; - unsigned long (*flusher)(struct mcryptd_alg_cstate *cstate); -}; - -/* return delay in jiffies from current time */ -static inline unsigned long get_delay(unsigned long t) -{ - long delay; - - delay = (long) t - (long) jiffies; - if (delay <= 0) - return 0; - else - return (unsigned long) delay; -} - -void mcryptd_arm_flusher(struct mcryptd_alg_cstate *cstate, unsigned long delay); - -#endif -- cgit v1.2.3-59-g8ed1b