X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?p=kvmfornfv.git;a=blobdiff_plain;f=kernel%2Fdrivers%2Fcrypto%2Fvmx%2Faes_cbc.c;h=0b8fe2ec5315fc8253431ca533d953b9c72d7243;hp=c8e7f653e5d363952463c29e6bc1e98816d38dcc;hb=e09b41010ba33a20a87472ee821fa407a5b8da36;hpb=f93b97fd65072de626c074dbe099a1fff05ce060

diff --git a/kernel/drivers/crypto/vmx/aes_cbc.c b/kernel/drivers/crypto/vmx/aes_cbc.c
index c8e7f653e..0b8fe2ec5 100644
--- a/kernel/drivers/crypto/vmx/aes_cbc.c
+++ b/kernel/drivers/crypto/vmx/aes_cbc.c
@@ -31,157 +31,171 @@
 #include "aesp8-ppc.h"
 
 struct p8_aes_cbc_ctx {
-    struct crypto_blkcipher *fallback;
-    struct aes_key enc_key;
-    struct aes_key dec_key;
+	struct crypto_blkcipher *fallback;
+	struct aes_key enc_key;
+	struct aes_key dec_key;
 };
 
 static int p8_aes_cbc_init(struct crypto_tfm *tfm)
 {
-    const char *alg;
-    struct crypto_blkcipher *fallback;
-    struct p8_aes_cbc_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_blkcipher(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_blkcipher_set_flags(fallback,
-            crypto_blkcipher_get_flags((struct crypto_blkcipher *) tfm));
-    ctx->fallback = fallback;
-
-    return 0;
+	const char *alg;
+	struct crypto_blkcipher *fallback;
+	struct p8_aes_cbc_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_blkcipher(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_blkcipher_set_flags(
+		fallback,
+		crypto_blkcipher_get_flags((struct crypto_blkcipher *)tfm));
+	ctx->fallback = fallback;
+
+	return 0;
 }
 
 static void p8_aes_cbc_exit(struct crypto_tfm *tfm)
 {
-    struct p8_aes_cbc_ctx *ctx = crypto_tfm_ctx(tfm);
+	struct p8_aes_cbc_ctx *ctx = crypto_tfm_ctx(tfm);
 
-    if (ctx->fallback) {
-        crypto_free_blkcipher(ctx->fallback);
-        ctx->fallback = NULL;
-    }
+	if (ctx->fallback) {
+		crypto_free_blkcipher(ctx->fallback);
+		ctx->fallback = NULL;
+	}
 }
 
 static int p8_aes_cbc_setkey(struct crypto_tfm *tfm, const u8 *key,
-    unsigned int keylen)
+			     unsigned int keylen)
 {
-    int ret;
-    struct p8_aes_cbc_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_blkcipher_setkey(ctx->fallback, key, keylen);
-    return ret;
+	int ret;
+	struct p8_aes_cbc_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_blkcipher_setkey(ctx->fallback, key, keylen);
+	return ret;
 }
 
 static int p8_aes_cbc_encrypt(struct blkcipher_desc *desc,
-    struct scatterlist *dst, struct scatterlist *src,
-    unsigned int nbytes)
+			      struct scatterlist *dst,
+			      struct scatterlist *src, unsigned int nbytes)
 {
-    int ret;
-    struct blkcipher_walk walk;
-    struct p8_aes_cbc_ctx *ctx = crypto_tfm_ctx(
-            crypto_blkcipher_tfm(desc->tfm));
-    struct blkcipher_desc fallback_desc = {
-        .tfm = ctx->fallback,
-        .info = desc->info,
-        .flags = desc->flags
-    };
-
-    if (in_interrupt()) {
-        ret = crypto_blkcipher_encrypt(&fallback_desc, dst, src, nbytes);
-    } else {
-        pagefault_disable();
-        enable_kernel_altivec();
-        enable_kernel_vsx();
-
-	blkcipher_walk_init(&walk, dst, src, nbytes);
-        ret = blkcipher_walk_virt(desc, &walk);
-        while ((nbytes = walk.nbytes)) {
-			aes_p8_cbc_encrypt(walk.src.virt.addr, walk.dst.virt.addr,
-				nbytes & AES_BLOCK_MASK, &ctx->enc_key, walk.iv, 1);
+	int ret;
+	struct blkcipher_walk walk;
+	struct p8_aes_cbc_ctx *ctx =
+		crypto_tfm_ctx(crypto_blkcipher_tfm(desc->tfm));
+	struct blkcipher_desc fallback_desc = {
+		.tfm = ctx->fallback,
+		.info = desc->info,
+		.flags = desc->flags
+	};
+
+	if (in_interrupt()) {
+		ret = crypto_blkcipher_encrypt(&fallback_desc, dst, src,
+					       nbytes);
+	} else {
+		preempt_disable();
+		pagefault_disable();
+		enable_kernel_altivec();
+		enable_kernel_vsx();
+
+		blkcipher_walk_init(&walk, dst, src, nbytes);
+		ret = blkcipher_walk_virt(desc, &walk);
+		while ((nbytes = walk.nbytes)) {
+			aes_p8_cbc_encrypt(walk.src.virt.addr,
+					   walk.dst.virt.addr,
+					   nbytes & AES_BLOCK_MASK,
+					   &ctx->enc_key, walk.iv, 1);
 			nbytes &= AES_BLOCK_SIZE - 1;
 			ret = blkcipher_walk_done(desc, &walk, nbytes);
-	}
+		}
 
-        pagefault_enable();
-    }
+		pagefault_enable();
+		preempt_enable();
+	}
 
-    return ret;
+	return ret;
 }
 
 static int p8_aes_cbc_decrypt(struct blkcipher_desc *desc,
-    struct scatterlist *dst, struct scatterlist *src,
-    unsigned int nbytes)
+			      struct scatterlist *dst,
+			      struct scatterlist *src, unsigned int nbytes)
 {
-    int ret;
-    struct blkcipher_walk walk;
-    struct p8_aes_cbc_ctx *ctx = crypto_tfm_ctx(
-            crypto_blkcipher_tfm(desc->tfm));
-    struct blkcipher_desc fallback_desc = {
-        .tfm = ctx->fallback,
-        .info = desc->info,
-        .flags = desc->flags
-    };
-
-    if (in_interrupt()) {
-        ret = crypto_blkcipher_decrypt(&fallback_desc, dst, src, nbytes);
-    } else {
-        pagefault_disable();
-        enable_kernel_altivec();
-        enable_kernel_vsx();
-
-	blkcipher_walk_init(&walk, dst, src, nbytes);
-        ret = blkcipher_walk_virt(desc, &walk);
-        while ((nbytes = walk.nbytes)) {
-			aes_p8_cbc_encrypt(walk.src.virt.addr, walk.dst.virt.addr,
-				nbytes & AES_BLOCK_MASK, &ctx->dec_key, walk.iv, 0);
+	int ret;
+	struct blkcipher_walk walk;
+	struct p8_aes_cbc_ctx *ctx =
+		crypto_tfm_ctx(crypto_blkcipher_tfm(desc->tfm));
+	struct blkcipher_desc fallback_desc = {
+		.tfm = ctx->fallback,
+		.info = desc->info,
+		.flags = desc->flags
+	};
+
+	if (in_interrupt()) {
+		ret = crypto_blkcipher_decrypt(&fallback_desc, dst, src,
+					       nbytes);
+	} else {
+		preempt_disable();
+		pagefault_disable();
+		enable_kernel_altivec();
+		enable_kernel_vsx();
+
+		blkcipher_walk_init(&walk, dst, src, nbytes);
+		ret = blkcipher_walk_virt(desc, &walk);
+		while ((nbytes = walk.nbytes)) {
+			aes_p8_cbc_encrypt(walk.src.virt.addr,
+					   walk.dst.virt.addr,
+					   nbytes & AES_BLOCK_MASK,
+					   &ctx->dec_key, walk.iv, 0);
 			nbytes &= AES_BLOCK_SIZE - 1;
 			ret = blkcipher_walk_done(desc, &walk, nbytes);
 		}
 
-        pagefault_enable();
-    }
+		pagefault_enable();
+		preempt_enable();
+	}
 
-    return ret;
+	return ret;
 }
 
 
 struct crypto_alg p8_aes_cbc_alg = {
-    .cra_name = "cbc(aes)",
-    .cra_driver_name = "p8_aes_cbc",
-    .cra_module = THIS_MODULE,
-    .cra_priority = 1000,
-    .cra_type = &crypto_blkcipher_type,
-    .cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | CRYPTO_ALG_NEED_FALLBACK,
-    .cra_alignmask = 0,
-    .cra_blocksize = AES_BLOCK_SIZE,
-    .cra_ctxsize = sizeof(struct p8_aes_cbc_ctx),
-    .cra_init = p8_aes_cbc_init,
-    .cra_exit = p8_aes_cbc_exit,
-    .cra_blkcipher = {
-        .ivsize = 0,
-        .min_keysize = AES_MIN_KEY_SIZE,
-        .max_keysize = AES_MAX_KEY_SIZE,
-        .setkey = p8_aes_cbc_setkey,
-        .encrypt = p8_aes_cbc_encrypt,
-        .decrypt = p8_aes_cbc_decrypt,
-    },
+	.cra_name = "cbc(aes)",
+	.cra_driver_name = "p8_aes_cbc",
+	.cra_module = THIS_MODULE,
+	.cra_priority = 1000,
+	.cra_type = &crypto_blkcipher_type,
+	.cra_flags = CRYPTO_ALG_TYPE_BLKCIPHER | CRYPTO_ALG_NEED_FALLBACK,
+	.cra_alignmask = 0,
+	.cra_blocksize = AES_BLOCK_SIZE,
+	.cra_ctxsize = sizeof(struct p8_aes_cbc_ctx),
+	.cra_init = p8_aes_cbc_init,
+	.cra_exit = p8_aes_cbc_exit,
+	.cra_blkcipher = {
+			  .ivsize = 0,
+			  .min_keysize = AES_MIN_KEY_SIZE,
+			  .max_keysize = AES_MAX_KEY_SIZE,
+			  .setkey = p8_aes_cbc_setkey,
+			  .encrypt = p8_aes_cbc_encrypt,
+			  .decrypt = p8_aes_cbc_decrypt,
+	},
 };
-