crypto: arm64/chacha - fix hchacha_block_neon() for big endian

ebiggers · herbertx · commit f86d17e9efe0 · 2019-02-28T14:37:48.000+08:00
On big endian arm64 kernels, the xchacha20-neon and xchacha12-neon self-tests fail because hchacha_block_neon() outputs little endian words but the C code expects native endianness. Fix it to output the words in native endianness (which also makes it match the arm32 version). Fixes: cc7cf99 ("crypto: arm64/chacha20 - add XChaCha20 support") Signed-off-by: Eric Biggers <ebiggers@google.com> Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/arch/arm64/crypto/chacha-neon-core.S b/arch/arm64/crypto/chacha-neon-core.S
@@ -158,8 +158,8 @@ ENTRY(hchacha_block_neon)
 	mov		w3, w2
 	bl		chacha_permute
 
-	st1		{v0.16b}, [x1], #16
-	st1		{v3.16b}, [x1]
+	st1		{v0.4s}, [x1], #16
+	st1		{v3.4s}, [x1]
 
 	ldp		x29, x30, [sp], #16
 	ret
