From e54def4ad8144ab15f826416e2e0f290ef1901b4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 19 Jun 2024 23:00:30 +0200 Subject: Adding upstream version 6.9.2. Signed-off-by: Daniel Baumann --- drivers/crypto/vmx/aes_ctr.c | 149 ------------------------------------------- 1 file changed, 149 deletions(-) delete mode 100644 drivers/crypto/vmx/aes_ctr.c (limited to 'drivers/crypto/vmx/aes_ctr.c') diff --git a/drivers/crypto/vmx/aes_ctr.c b/drivers/crypto/vmx/aes_ctr.c deleted file mode 100644 index 9a3da8cd62..0000000000 --- a/drivers/crypto/vmx/aes_ctr.c +++ /dev/null @@ -1,149 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * AES CTR routines supporting VMX instructions on the Power 8 - * - * Copyright (C) 2015 International Business Machines Inc. - * - * Author: Marcelo Henrique Cerri - */ - -#include -#include -#include -#include -#include - -#include "aesp8-ppc.h" - -struct p8_aes_ctr_ctx { - struct crypto_skcipher *fallback; - struct aes_key enc_key; -}; - -static int p8_aes_ctr_init(struct crypto_skcipher *tfm) -{ - struct p8_aes_ctr_ctx *ctx = crypto_skcipher_ctx(tfm); - struct crypto_skcipher *fallback; - - fallback = crypto_alloc_skcipher("ctr(aes)", 0, - CRYPTO_ALG_NEED_FALLBACK | - CRYPTO_ALG_ASYNC); - if (IS_ERR(fallback)) { - pr_err("Failed to allocate ctr(aes) fallback: %ld\n", - PTR_ERR(fallback)); - return PTR_ERR(fallback); - } - - crypto_skcipher_set_reqsize(tfm, sizeof(struct skcipher_request) + - crypto_skcipher_reqsize(fallback)); - ctx->fallback = fallback; - return 0; -} - -static void p8_aes_ctr_exit(struct crypto_skcipher *tfm) -{ - struct p8_aes_ctr_ctx *ctx = crypto_skcipher_ctx(tfm); - - crypto_free_skcipher(ctx->fallback); -} - -static int p8_aes_ctr_setkey(struct crypto_skcipher *tfm, const u8 *key, - unsigned int keylen) -{ - struct p8_aes_ctr_ctx *ctx = crypto_skcipher_ctx(tfm); - int ret; - - preempt_disable(); - pagefault_disable(); - enable_kernel_vsx(); - ret = aes_p8_set_encrypt_key(key, keylen * 8, &ctx->enc_key); - disable_kernel_vsx(); - pagefault_enable(); - preempt_enable(); - - ret |= crypto_skcipher_setkey(ctx->fallback, key, keylen); - - return ret ? -EINVAL : 0; -} - -static void p8_aes_ctr_final(const struct p8_aes_ctr_ctx *ctx, - struct skcipher_walk *walk) -{ - u8 *ctrblk = walk->iv; - u8 keystream[AES_BLOCK_SIZE]; - u8 *src = walk->src.virt.addr; - u8 *dst = walk->dst.virt.addr; - unsigned int nbytes = walk->nbytes; - - preempt_disable(); - pagefault_disable(); - enable_kernel_vsx(); - aes_p8_encrypt(ctrblk, keystream, &ctx->enc_key); - disable_kernel_vsx(); - pagefault_enable(); - preempt_enable(); - - crypto_xor_cpy(dst, keystream, src, nbytes); - crypto_inc(ctrblk, AES_BLOCK_SIZE); -} - -static int p8_aes_ctr_crypt(struct skcipher_request *req) -{ - struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); - const struct p8_aes_ctr_ctx *ctx = crypto_skcipher_ctx(tfm); - struct skcipher_walk walk; - unsigned int nbytes; - int ret; - - if (!crypto_simd_usable()) { - struct skcipher_request *subreq = skcipher_request_ctx(req); - - *subreq = *req; - skcipher_request_set_tfm(subreq, ctx->fallback); - return crypto_skcipher_encrypt(subreq); - } - - ret = skcipher_walk_virt(&walk, req, false); - while ((nbytes = walk.nbytes) >= AES_BLOCK_SIZE) { - preempt_disable(); - pagefault_disable(); - enable_kernel_vsx(); - aes_p8_ctr32_encrypt_blocks(walk.src.virt.addr, - walk.dst.virt.addr, - nbytes / AES_BLOCK_SIZE, - &ctx->enc_key, walk.iv); - disable_kernel_vsx(); - pagefault_enable(); - preempt_enable(); - - do { - crypto_inc(walk.iv, AES_BLOCK_SIZE); - } while ((nbytes -= AES_BLOCK_SIZE) >= AES_BLOCK_SIZE); - - ret = skcipher_walk_done(&walk, nbytes); - } - if (nbytes) { - p8_aes_ctr_final(ctx, &walk); - ret = skcipher_walk_done(&walk, 0); - } - return ret; -} - -struct skcipher_alg p8_aes_ctr_alg = { - .base.cra_name = "ctr(aes)", - .base.cra_driver_name = "p8_aes_ctr", - .base.cra_module = THIS_MODULE, - .base.cra_priority = 2000, - .base.cra_flags = CRYPTO_ALG_NEED_FALLBACK, - .base.cra_blocksize = 1, - .base.cra_ctxsize = sizeof(struct p8_aes_ctr_ctx), - .setkey = p8_aes_ctr_setkey, - .encrypt = p8_aes_ctr_crypt, - .decrypt = p8_aes_ctr_crypt, - .init = p8_aes_ctr_init, - .exit = p8_aes_ctr_exit, - .min_keysize = AES_MIN_KEY_SIZE, - .max_keysize = AES_MAX_KEY_SIZE, - .ivsize = AES_BLOCK_SIZE, - .chunksize = AES_BLOCK_SIZE, -}; -- cgit v1.2.3