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author | Danny Tsen <dtsen@linux.ibm.com> | 2024-01-02 23:58:56 +0300 |
---|---|---|
committer | Herbert Xu <herbert@gondor.apana.org.au> | 2024-01-26 11:36:57 +0300 |
commit | 109303336a0cc8ed903d8b1b83114d79b841d8de (patch) | |
tree | bdaa76d29b27b4e4b70f8d3b255eaab8a0c8525c /arch/powerpc/crypto/aes_cbc.c | |
parent | e01966e643c97eb8916bbbbbeceb687afb11f345 (diff) | |
download | linux-109303336a0cc8ed903d8b1b83114d79b841d8de.tar.xz |
crypto: vmx - Move to arch/powerpc/crypto
Relocate all crypto files in vmx driver to arch/powerpc/crypto directory
and remove vmx directory.
drivers/crypto/vmx/aes.c rename to arch/powerpc/crypto/aes.c
drivers/crypto/vmx/aes_cbc.c rename to arch/powerpc/crypto/aes_cbc.c
drivers/crypto/vmx/aes_ctr.c rename to arch/powerpc/crypto/aes_ctr.c
drivers/crypto/vmx/aes_xts.c rename to arch/powerpc/crypto/aes_xts.c
drivers/crypto/vmx/aesp8-ppc.h rename to arch/powerpc/crypto/aesp8-ppc.h
drivers/crypto/vmx/aesp8-ppc.pl rename to arch/powerpc/crypto/aesp8-ppc.pl
drivers/crypto/vmx/ghash.c rename to arch/powerpc/crypto/ghash.c
drivers/crypto/vmx/ghashp8-ppc.pl rename to arch/powerpc/crypto/ghashp8-ppc.pl
drivers/crypto/vmx/vmx.c rename to arch/powerpc/crypto/vmx.c
deleted files:
drivers/crypto/vmx/Makefile
drivers/crypto/vmx/Kconfig
drivers/crypto/vmx/ppc-xlate.pl
This patch has been tested has passed the selftest. The patch is also tested with
CONFIG_CRYPTO_MANAGER_EXTRA_TESTS enabled.
Signed-off-by: Danny Tsen <dtsen@linux.ibm.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'arch/powerpc/crypto/aes_cbc.c')
-rw-r--r-- | arch/powerpc/crypto/aes_cbc.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/arch/powerpc/crypto/aes_cbc.c b/arch/powerpc/crypto/aes_cbc.c new file mode 100644 index 000000000000..ed0debc7acb5 --- /dev/null +++ b/arch/powerpc/crypto/aes_cbc.c @@ -0,0 +1,133 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * AES CBC routines supporting VMX instructions on the Power 8 + * + * Copyright (C) 2015 International Business Machines Inc. + * + * Author: Marcelo Henrique Cerri <mhcerri@br.ibm.com> + */ + +#include <asm/simd.h> +#include <asm/switch_to.h> +#include <crypto/aes.h> +#include <crypto/internal/simd.h> +#include <crypto/internal/skcipher.h> + +#include "aesp8-ppc.h" + +struct p8_aes_cbc_ctx { + struct crypto_skcipher *fallback; + struct aes_key enc_key; + struct aes_key dec_key; +}; + +static int p8_aes_cbc_init(struct crypto_skcipher *tfm) +{ + struct p8_aes_cbc_ctx *ctx = crypto_skcipher_ctx(tfm); + struct crypto_skcipher *fallback; + + fallback = crypto_alloc_skcipher("cbc(aes)", 0, + CRYPTO_ALG_NEED_FALLBACK | + CRYPTO_ALG_ASYNC); + if (IS_ERR(fallback)) { + pr_err("Failed to allocate cbc(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_cbc_exit(struct crypto_skcipher *tfm) +{ + struct p8_aes_cbc_ctx *ctx = crypto_skcipher_ctx(tfm); + + crypto_free_skcipher(ctx->fallback); +} + +static int p8_aes_cbc_setkey(struct crypto_skcipher *tfm, const u8 *key, + unsigned int keylen) +{ + struct p8_aes_cbc_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); + ret |= aes_p8_set_decrypt_key(key, keylen * 8, &ctx->dec_key); + disable_kernel_vsx(); + pagefault_enable(); + preempt_enable(); + + ret |= crypto_skcipher_setkey(ctx->fallback, key, keylen); + + return ret ? -EINVAL : 0; +} + +static int p8_aes_cbc_crypt(struct skcipher_request *req, int enc) +{ + struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req); + const struct p8_aes_cbc_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 enc ? crypto_skcipher_encrypt(subreq) : + crypto_skcipher_decrypt(subreq); + } + + ret = skcipher_walk_virt(&walk, req, false); + while ((nbytes = walk.nbytes) != 0) { + preempt_disable(); + pagefault_disable(); + enable_kernel_vsx(); + aes_p8_cbc_encrypt(walk.src.virt.addr, + walk.dst.virt.addr, + round_down(nbytes, AES_BLOCK_SIZE), + enc ? &ctx->enc_key : &ctx->dec_key, + walk.iv, enc); + disable_kernel_vsx(); + pagefault_enable(); + preempt_enable(); + + ret = skcipher_walk_done(&walk, nbytes % AES_BLOCK_SIZE); + } + return ret; +} + +static int p8_aes_cbc_encrypt(struct skcipher_request *req) +{ + return p8_aes_cbc_crypt(req, 1); +} + +static int p8_aes_cbc_decrypt(struct skcipher_request *req) +{ + return p8_aes_cbc_crypt(req, 0); +} + +struct skcipher_alg p8_aes_cbc_alg = { + .base.cra_name = "cbc(aes)", + .base.cra_driver_name = "p8_aes_cbc", + .base.cra_module = THIS_MODULE, + .base.cra_priority = 2000, + .base.cra_flags = CRYPTO_ALG_NEED_FALLBACK, + .base.cra_blocksize = AES_BLOCK_SIZE, + .base.cra_ctxsize = sizeof(struct p8_aes_cbc_ctx), + .setkey = p8_aes_cbc_setkey, + .encrypt = p8_aes_cbc_encrypt, + .decrypt = p8_aes_cbc_decrypt, + .init = p8_aes_cbc_init, + .exit = p8_aes_cbc_exit, + .min_keysize = AES_MIN_KEY_SIZE, + .max_keysize = AES_MAX_KEY_SIZE, + .ivsize = AES_BLOCK_SIZE, +}; |