1 files changed, 23 insertions, 24 deletions

diff --git a/arch/arm64/crypto/aes-ce-ccm-glue.c b/arch/arm64/crypto/aes-ce-ccm-glue.c
index a1254036f2b1..68b11aa690e4 100644
--- a/arch/arm64/crypto/aes-ce-ccm-glue.c
+++ b/arch/arm64/crypto/aes-ce-ccm-glue.c
@@ -107,11 +107,13 @@ static int ccm_init_mac(struct aead_request *req, u8 maciv[], u32 msglen)
 }
 
 static void ccm_update_mac(struct crypto_aes_ctx *key, u8 mac[], u8 const in[],
-			   u32 abytes, u32 *macp, bool use_neon)
+			   u32 abytes, u32 *macp)
 {
-	if (likely(use_neon)) {
+	if (may_use_simd()) {
+		kernel_neon_begin();
 		ce_aes_ccm_auth_data(mac, in, abytes, macp, key->key_enc,
 				     num_rounds(key));
+		kernel_neon_end();
 	} else {
 		if (*macp > 0 && *macp < AES_BLOCK_SIZE) {
 			int added = min(abytes, AES_BLOCK_SIZE - *macp);
@@ -143,8 +145,7 @@ static void ccm_update_mac(struct crypto_aes_ctx *key, u8 mac[], u8 const in[],
 	}
 }
 
-static void ccm_calculate_auth_mac(struct aead_request *req, u8 mac[],
-				   bool use_neon)
+static void ccm_calculate_auth_mac(struct aead_request *req, u8 mac[])
 {
 	struct crypto_aead *aead = crypto_aead_reqtfm(req);
 	struct crypto_aes_ctx *ctx = crypto_aead_ctx(aead);
@@ -163,7 +164,7 @@ static void ccm_calculate_auth_mac(struct aead_request *req, u8 mac[],
 		ltag.len = 6;
 	}
 
-	ccm_update_mac(ctx, mac, (u8 *)&ltag, ltag.len, &macp, use_neon);
+	ccm_update_mac(ctx, mac, (u8 *)&ltag, ltag.len, &macp);
 	scatterwalk_start(&walk, req->src);
 
 	do {
@@ -175,7 +176,7 @@ static void ccm_calculate_auth_mac(struct aead_request *req, u8 mac[],
 			n = scatterwalk_clamp(&walk, len);
 		}
 		p = scatterwalk_map(&walk);
-		ccm_update_mac(ctx, mac, p, n, &macp, use_neon);
+		ccm_update_mac(ctx, mac, p, n, &macp);
 		len -= n;
 
 		scatterwalk_unmap(p);
@@ -242,43 +243,42 @@ static int ccm_encrypt(struct aead_request *req)
 	u8 __aligned(8) mac[AES_BLOCK_SIZE];
 	u8 buf[AES_BLOCK_SIZE];
 	u32 len = req->cryptlen;
-	bool use_neon = may_use_simd();
 	int err;
 
 	err = ccm_init_mac(req, mac, len);
 	if (err)
 		return err;
 
-	if (likely(use_neon))
-		kernel_neon_begin();
-
 	if (req->assoclen)
-		ccm_calculate_auth_mac(req, mac, use_neon);
+		ccm_calculate_auth_mac(req, mac);
 
 	/* preserve the original iv for the final round */
 	memcpy(buf, req->iv, AES_BLOCK_SIZE);
 
 	err = skcipher_walk_aead_encrypt(&walk, req, true);
 
-	if (likely(use_neon)) {
+	if (may_use_simd()) {
 		while (walk.nbytes) {
 			u32 tail = walk.nbytes % AES_BLOCK_SIZE;
 
 			if (walk.nbytes == walk.total)
 				tail = 0;
 
+			kernel_neon_begin();
 			ce_aes_ccm_encrypt(walk.dst.virt.addr,
 					   walk.src.virt.addr,
 					   walk.nbytes - tail, ctx->key_enc,
 					   num_rounds(ctx), mac, walk.iv);
+			kernel_neon_end();
 
 			err = skcipher_walk_done(&walk, tail);
 		}
-		if (!err)
+		if (!err) {
+			kernel_neon_begin();
 			ce_aes_ccm_final(mac, buf, ctx->key_enc,
 					 num_rounds(ctx));
-
-		kernel_neon_end();
+			kernel_neon_end();
+		}
 	} else {
 		err = ccm_crypt_fallback(&walk, mac, buf, ctx, true);
 	}
@@ -301,43 +301,42 @@ static int ccm_decrypt(struct aead_request *req)
 	u8 __aligned(8) mac[AES_BLOCK_SIZE];
 	u8 buf[AES_BLOCK_SIZE];
 	u32 len = req->cryptlen - authsize;
-	bool use_neon = may_use_simd();
 	int err;
 
 	err = ccm_init_mac(req, mac, len);
 	if (err)
 		return err;
 
-	if (likely(use_neon))
-		kernel_neon_begin();
-
 	if (req->assoclen)
-		ccm_calculate_auth_mac(req, mac, use_neon);
+		ccm_calculate_auth_mac(req, mac);
 
 	/* preserve the original iv for the final round */
 	memcpy(buf, req->iv, AES_BLOCK_SIZE);
 
 	err = skcipher_walk_aead_decrypt(&walk, req, true);
 
-	if (likely(use_neon)) {
+	if (may_use_simd()) {
 		while (walk.nbytes) {
 			u32 tail = walk.nbytes % AES_BLOCK_SIZE;
 
 			if (walk.nbytes == walk.total)
 				tail = 0;
 
+			kernel_neon_begin();
 			ce_aes_ccm_decrypt(walk.dst.virt.addr,
 					   walk.src.virt.addr,
 					   walk.nbytes - tail, ctx->key_enc,
 					   num_rounds(ctx), mac, walk.iv);
+			kernel_neon_end();
 
 			err = skcipher_walk_done(&walk, tail);
 		}
-		if (!err)
+		if (!err) {
+			kernel_neon_begin();
 			ce_aes_ccm_final(mac, buf, ctx->key_enc,
 					 num_rounds(ctx));
-
-		kernel_neon_end();
+			kernel_neon_end();
+		}
 	} else {
 		err = ccm_crypt_fallback(&walk, mac, buf, ctx, false);
 	}