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[10/11] crypto: arm/nhpoly1305 - eliminate unnecessary CFI wrapper

Message ID 20221118090220.398819-11-ebiggers@kernel.org
State New
Headers show
Series [01/11] crypto: x86/aegis128 - fix crash with CFI enabled | expand

Commit Message

Eric Biggers Nov. 18, 2022, 9:02 a.m. UTC 
From: Eric Biggers <ebiggers@google.com>

The arm architecture doesn't support CFI yet, and even if it did, the
new CFI implementation supports indirect calls to assembly functions.
Therefore, there's no need to use a wrapper function for nh_neon().

Signed-off-by: Eric Biggers <ebiggers@google.com>
---
 arch/arm/crypto/nh-neon-core.S         |  2 +-
 arch/arm/crypto/nhpoly1305-neon-glue.c | 11 ++---------
 2 files changed, 3 insertions(+), 10 deletions(-)
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Patch

diff --git a/arch/arm/crypto/nh-neon-core.S b/arch/arm/crypto/nh-neon-core.S
index 434d80ab531c2..01620a0782ca9 100644
--- a/arch/arm/crypto/nh-neon-core.S
+++ b/arch/arm/crypto/nh-neon-core.S
@@ -69,7 +69,7 @@ 
 
 /*
  * void nh_neon(const u32 *key, const u8 *message, size_t message_len,
- *		u8 hash[NH_HASH_BYTES])
+ *		__le64 hash[NH_NUM_PASSES])
  *
  * It's guaranteed that message_len % 16 == 0.
  */
diff --git a/arch/arm/crypto/nhpoly1305-neon-glue.c b/arch/arm/crypto/nhpoly1305-neon-glue.c
index ffa8d73fe722c..e93e41ff26566 100644
--- a/arch/arm/crypto/nhpoly1305-neon-glue.c
+++ b/arch/arm/crypto/nhpoly1305-neon-glue.c
@@ -14,14 +14,7 @@ 
 #include <linux/module.h>
 
 asmlinkage void nh_neon(const u32 *key, const u8 *message, size_t message_len,
-			u8 hash[NH_HASH_BYTES]);
-
-/* wrapper to avoid indirect call to assembly, which doesn't work with CFI */
-static void _nh_neon(const u32 *key, const u8 *message, size_t message_len,
-		     __le64 hash[NH_NUM_PASSES])
-{
-	nh_neon(key, message, message_len, (u8 *)hash);
-}
+			__le64 hash[NH_NUM_PASSES]);
 
 static int nhpoly1305_neon_update(struct shash_desc *desc,
 				  const u8 *src, unsigned int srclen)
@@ -33,7 +26,7 @@  static int nhpoly1305_neon_update(struct shash_desc *desc,
 		unsigned int n = min_t(unsigned int, srclen, SZ_4K);
 
 		kernel_neon_begin();
-		crypto_nhpoly1305_update_helper(desc, src, n, _nh_neon);
+		crypto_nhpoly1305_update_helper(desc, src, n, nh_neon);
 		kernel_neon_end();
 		src += n;
 		srclen -= n;