There is no need for elaborate yield handling in the bit-sliced NEON
implementation of AES, given that skciphers are naturally bounded by the
size of the chunks returned by the skcipher_walk API. So remove the
yield calls from the asm code.
Signed-off-by: Ard Biesheuvel <ardb@xxxxxxxxxx>
---
arch/arm64/crypto/aes-neonbs-core.S | 8 ++------
1 file changed, 2 insertions(+), 6 deletions(-)
diff --git a/arch/arm64/crypto/aes-neonbs-core.S b/arch/arm64/crypto/aes-neonbs-core.S
index 63a52ad9a75c..a3405b8c344b 100644
--- a/arch/arm64/crypto/aes-neonbs-core.S
+++ b/arch/arm64/crypto/aes-neonbs-core.S
@@ -613,7 +613,6 @@ SYM_FUNC_END(aesbs_decrypt8)
st1 {\o7\().16b}, [x19], #16
cbz x23, 1f
- cond_yield_neon
b 99b
1: frame_pop
@@ -715,7 +714,6 @@ SYM_FUNC_START(aesbs_cbc_decrypt)
1: st1 {v24.16b}, [x24] // store IV
cbz x23, 2f
- cond_yield_neon
b 99b
2: frame_pop
@@ -801,7 +799,7 @@ SYM_FUNC_END(__xts_crypt8)
mov x23, x4
mov x24, x5
-0: movi v30.2s, #0x1
+ movi v30.2s, #0x1
movi v25.2s, #0x87
uzp1 v30.4s, v30.4s, v25.4s
ld1 {v25.16b}, [x24]
@@ -846,7 +844,6 @@ SYM_FUNC_END(__xts_crypt8)
cbz x23, 1f
st1 {v25.16b}, [x24]
- cond_yield_neon 0b
b 99b
1: st1 {v25.16b}, [x24]
@@ -889,7 +886,7 @@ SYM_FUNC_START(aesbs_ctr_encrypt)
cset x26, ne
add x23, x23, x26 // do one extra block if final
-98: ldp x7, x8, [x24]
+ ldp x7, x8, [x24]
ld1 {v0.16b}, [x24]
CPU_LE( rev x7, x7 )
CPU_LE( rev x8, x8 )
@@ -967,7 +964,6 @@ CPU_LE( rev x8, x8 )
st1 {v0.16b}, [x24]
cbz x23, .Lctr_done
- cond_yield_neon 98b
b 99b
.Lctr_done:
--
2.30.0
