diff options
Diffstat (limited to 'kernel/drivers/crypto/vmx/aes.c')
| -rw-r--r-- | kernel/drivers/crypto/vmx/aes.c | 178 |
1 files changed, 93 insertions, 85 deletions
diff --git a/kernel/drivers/crypto/vmx/aes.c b/kernel/drivers/crypto/vmx/aes.c index 41f93334c..263af709e 100644 --- a/kernel/drivers/crypto/vmx/aes.c +++ b/kernel/drivers/crypto/vmx/aes.c @@ -30,113 +30,121 @@ #include "aesp8-ppc.h" struct p8_aes_ctx { - struct crypto_cipher *fallback; - struct aes_key enc_key; - struct aes_key dec_key; + struct crypto_cipher *fallback; + struct aes_key enc_key; + struct aes_key dec_key; }; static int p8_aes_init(struct crypto_tfm *tfm) { - const char *alg; - struct crypto_cipher *fallback; - struct p8_aes_ctx *ctx = crypto_tfm_ctx(tfm); - - if (!(alg = crypto_tfm_alg_name(tfm))) { - printk(KERN_ERR "Failed to get algorithm name.\n"); - return -ENOENT; - } - - fallback = crypto_alloc_cipher(alg, 0 ,CRYPTO_ALG_NEED_FALLBACK); - if (IS_ERR(fallback)) { - printk(KERN_ERR "Failed to allocate transformation for '%s': %ld\n", - alg, PTR_ERR(fallback)); - return PTR_ERR(fallback); - } - printk(KERN_INFO "Using '%s' as fallback implementation.\n", - crypto_tfm_alg_driver_name((struct crypto_tfm *) fallback)); - - crypto_cipher_set_flags(fallback, - crypto_cipher_get_flags((struct crypto_cipher *) tfm)); - ctx->fallback = fallback; - - return 0; + const char *alg; + struct crypto_cipher *fallback; + struct p8_aes_ctx *ctx = crypto_tfm_ctx(tfm); + + if (!(alg = crypto_tfm_alg_name(tfm))) { + printk(KERN_ERR "Failed to get algorithm name.\n"); + return -ENOENT; + } + + fallback = crypto_alloc_cipher(alg, 0, CRYPTO_ALG_NEED_FALLBACK); + if (IS_ERR(fallback)) { + printk(KERN_ERR + "Failed to allocate transformation for '%s': %ld\n", + alg, PTR_ERR(fallback)); + return PTR_ERR(fallback); + } + printk(KERN_INFO "Using '%s' as fallback implementation.\n", + crypto_tfm_alg_driver_name((struct crypto_tfm *) fallback)); + + crypto_cipher_set_flags(fallback, + crypto_cipher_get_flags((struct + crypto_cipher *) + tfm)); + ctx->fallback = fallback; + + return 0; } static void p8_aes_exit(struct crypto_tfm *tfm) { - struct p8_aes_ctx *ctx = crypto_tfm_ctx(tfm); + struct p8_aes_ctx *ctx = crypto_tfm_ctx(tfm); - if (ctx->fallback) { - crypto_free_cipher(ctx->fallback); - ctx->fallback = NULL; - } + if (ctx->fallback) { + crypto_free_cipher(ctx->fallback); + ctx->fallback = NULL; + } } static int p8_aes_setkey(struct crypto_tfm *tfm, const u8 *key, - unsigned int keylen) + unsigned int keylen) { - int ret; - struct p8_aes_ctx *ctx = crypto_tfm_ctx(tfm); - - pagefault_disable(); - enable_kernel_altivec(); - 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); - pagefault_enable(); - - ret += crypto_cipher_setkey(ctx->fallback, key, keylen); - return ret; + int ret; + struct p8_aes_ctx *ctx = crypto_tfm_ctx(tfm); + + preempt_disable(); + pagefault_disable(); + enable_kernel_altivec(); + 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); + pagefault_enable(); + preempt_enable(); + + ret += crypto_cipher_setkey(ctx->fallback, key, keylen); + return ret; } static void p8_aes_encrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) { - struct p8_aes_ctx *ctx = crypto_tfm_ctx(tfm); - - if (in_interrupt()) { - crypto_cipher_encrypt_one(ctx->fallback, dst, src); - } else { - pagefault_disable(); - enable_kernel_altivec(); - enable_kernel_vsx(); - aes_p8_encrypt(src, dst, &ctx->enc_key); - pagefault_enable(); - } + struct p8_aes_ctx *ctx = crypto_tfm_ctx(tfm); + + if (in_interrupt()) { + crypto_cipher_encrypt_one(ctx->fallback, dst, src); + } else { + preempt_disable(); + pagefault_disable(); + enable_kernel_altivec(); + enable_kernel_vsx(); + aes_p8_encrypt(src, dst, &ctx->enc_key); + pagefault_enable(); + preempt_enable(); + } } static void p8_aes_decrypt(struct crypto_tfm *tfm, u8 *dst, const u8 *src) { - struct p8_aes_ctx *ctx = crypto_tfm_ctx(tfm); - - if (in_interrupt()) { - crypto_cipher_decrypt_one(ctx->fallback, dst, src); - } else { - pagefault_disable(); - enable_kernel_altivec(); - enable_kernel_vsx(); - aes_p8_decrypt(src, dst, &ctx->dec_key); - pagefault_enable(); - } + struct p8_aes_ctx *ctx = crypto_tfm_ctx(tfm); + + if (in_interrupt()) { + crypto_cipher_decrypt_one(ctx->fallback, dst, src); + } else { + preempt_disable(); + pagefault_disable(); + enable_kernel_altivec(); + enable_kernel_vsx(); + aes_p8_decrypt(src, dst, &ctx->dec_key); + pagefault_enable(); + preempt_enable(); + } } struct crypto_alg p8_aes_alg = { - .cra_name = "aes", - .cra_driver_name = "p8_aes", - .cra_module = THIS_MODULE, - .cra_priority = 1000, - .cra_type = NULL, - .cra_flags = CRYPTO_ALG_TYPE_CIPHER | CRYPTO_ALG_NEED_FALLBACK, - .cra_alignmask = 0, - .cra_blocksize = AES_BLOCK_SIZE, - .cra_ctxsize = sizeof(struct p8_aes_ctx), - .cra_init = p8_aes_init, - .cra_exit = p8_aes_exit, - .cra_cipher = { - .cia_min_keysize = AES_MIN_KEY_SIZE, - .cia_max_keysize = AES_MAX_KEY_SIZE, - .cia_setkey = p8_aes_setkey, - .cia_encrypt = p8_aes_encrypt, - .cia_decrypt = p8_aes_decrypt, - }, + .cra_name = "aes", + .cra_driver_name = "p8_aes", + .cra_module = THIS_MODULE, + .cra_priority = 1000, + .cra_type = NULL, + .cra_flags = CRYPTO_ALG_TYPE_CIPHER | CRYPTO_ALG_NEED_FALLBACK, + .cra_alignmask = 0, + .cra_blocksize = AES_BLOCK_SIZE, + .cra_ctxsize = sizeof(struct p8_aes_ctx), + .cra_init = p8_aes_init, + .cra_exit = p8_aes_exit, + .cra_cipher = { + .cia_min_keysize = AES_MIN_KEY_SIZE, + .cia_max_keysize = AES_MAX_KEY_SIZE, + .cia_setkey = p8_aes_setkey, + .cia_encrypt = p8_aes_encrypt, + .cia_decrypt = p8_aes_decrypt, + }, }; 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