1 files changed, 1 insertions, 104 deletions

diff --git a/arch/arm64/crypto/sm4-neon-glue.c b/arch/arm64/crypto/sm4-neon-glue.c
index 7b19accf5c03..e3500aca2d18 100644
--- a/arch/arm64/crypto/sm4-neon-glue.c
+++ b/arch/arm64/crypto/sm4-neon-glue.c
@@ -22,8 +22,6 @@ asmlinkage void sm4_neon_crypt(const u32 *rkey, u8 *dst, const u8 *src,
 			       unsigned int nblocks);
 asmlinkage void sm4_neon_cbc_dec(const u32 *rkey_dec, u8 *dst, const u8 *src,
 				 u8 *iv, unsigned int nblocks);
-asmlinkage void sm4_neon_cfb_dec(const u32 *rkey_enc, u8 *dst, const u8 *src,
-				 u8 *iv, unsigned int nblocks);
 asmlinkage void sm4_neon_ctr_crypt(const u32 *rkey_enc, u8 *dst, const u8 *src,
 				   u8 *iv, unsigned int nblocks);
 
@@ -142,90 +140,6 @@ static int sm4_cbc_decrypt(struct skcipher_request *req)
 	return err;
 }
 
-static int sm4_cfb_encrypt(struct skcipher_request *req)
-{
-	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
-	struct sm4_ctx *ctx = crypto_skcipher_ctx(tfm);
-	struct skcipher_walk walk;
-	unsigned int nbytes;
-	int err;
-
-	err = skcipher_walk_virt(&walk, req, false);
-
-	while ((nbytes = walk.nbytes) > 0) {
-		u8 keystream[SM4_BLOCK_SIZE];
-		const u8 *iv = walk.iv;
-		const u8 *src = walk.src.virt.addr;
-		u8 *dst = walk.dst.virt.addr;
-
-		while (nbytes >= SM4_BLOCK_SIZE) {
-			sm4_crypt_block(ctx->rkey_enc, keystream, iv);
-			crypto_xor_cpy(dst, src, keystream, SM4_BLOCK_SIZE);
-			iv = dst;
-			src += SM4_BLOCK_SIZE;
-			dst += SM4_BLOCK_SIZE;
-			nbytes -= SM4_BLOCK_SIZE;
-		}
-		if (iv != walk.iv)
-			memcpy(walk.iv, iv, SM4_BLOCK_SIZE);
-
-		/* tail */
-		if (walk.nbytes == walk.total && nbytes > 0) {
-			sm4_crypt_block(ctx->rkey_enc, keystream, walk.iv);
-			crypto_xor_cpy(dst, src, keystream, nbytes);
-			nbytes = 0;
-		}
-
-		err = skcipher_walk_done(&walk, nbytes);
-	}
-
-	return err;
-}
-
-static int sm4_cfb_decrypt(struct skcipher_request *req)
-{
-	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
-	struct sm4_ctx *ctx = crypto_skcipher_ctx(tfm);
-	struct skcipher_walk walk;
-	unsigned int nbytes;
-	int err;
-
-	err = skcipher_walk_virt(&walk, req, false);
-
-	while ((nbytes = walk.nbytes) > 0) {
-		const u8 *src = walk.src.virt.addr;
-		u8 *dst = walk.dst.virt.addr;
-		unsigned int nblocks;
-
-		nblocks = nbytes / SM4_BLOCK_SIZE;
-		if (nblocks) {
-			kernel_neon_begin();
-
-			sm4_neon_cfb_dec(ctx->rkey_enc, dst, src,
-					 walk.iv, nblocks);
-
-			kernel_neon_end();
-
-			dst += nblocks * SM4_BLOCK_SIZE;
-			src += nblocks * SM4_BLOCK_SIZE;
-			nbytes -= nblocks * SM4_BLOCK_SIZE;
-		}
-
-		/* tail */
-		if (walk.nbytes == walk.total && nbytes > 0) {
-			u8 keystream[SM4_BLOCK_SIZE];
-
-			sm4_crypt_block(ctx->rkey_enc, keystream, walk.iv);
-			crypto_xor_cpy(dst, src, keystream, nbytes);
-			nbytes = 0;
-		}
-
-		err = skcipher_walk_done(&walk, nbytes);
-	}
-
-	return err;
-}
-
 static int sm4_ctr_crypt(struct skcipher_request *req)
 {
 	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
@@ -303,22 +217,6 @@ static struct skcipher_alg sm4_algs[] = {
 		.decrypt	= sm4_cbc_decrypt,
 	}, {
 		.base = {
-			.cra_name		= "cfb(sm4)",
-			.cra_driver_name	= "cfb-sm4-neon",
-			.cra_priority		= 200,
-			.cra_blocksize		= 1,
-			.cra_ctxsize		= sizeof(struct sm4_ctx),
-			.cra_module		= THIS_MODULE,
-		},
-		.min_keysize	= SM4_KEY_SIZE,
-		.max_keysize	= SM4_KEY_SIZE,
-		.ivsize		= SM4_BLOCK_SIZE,
-		.chunksize	= SM4_BLOCK_SIZE,
-		.setkey		= sm4_setkey,
-		.encrypt	= sm4_cfb_encrypt,
-		.decrypt	= sm4_cfb_decrypt,
-	}, {
-		.base = {
 			.cra_name		= "ctr(sm4)",
 			.cra_driver_name	= "ctr-sm4-neon",
 			.cra_priority		= 200,
@@ -349,12 +247,11 @@ static void __exit sm4_exit(void)
 module_init(sm4_init);
 module_exit(sm4_exit);
 
-MODULE_DESCRIPTION("SM4 ECB/CBC/CFB/CTR using ARMv8 NEON");
+MODULE_DESCRIPTION("SM4 ECB/CBC/CTR using ARMv8 NEON");
 MODULE_ALIAS_CRYPTO("sm4-neon");
 MODULE_ALIAS_CRYPTO("sm4");
 MODULE_ALIAS_CRYPTO("ecb(sm4)");
 MODULE_ALIAS_CRYPTO("cbc(sm4)");
-MODULE_ALIAS_CRYPTO("cfb(sm4)");
 MODULE_ALIAS_CRYPTO("ctr(sm4)");
 MODULE_AUTHOR("Tianjia Zhang <tianjia.zhang@linux.alibaba.com>");
 MODULE_LICENSE("GPL v2");