[PATCH v2 6/9] crypto: arm64/aes-neonbs - remove NEON yield calls
From: Ard Biesheuvel <ardb@kernel.org>
Date: 2021-02-03 11:38:54
Also in:
linux-crypto
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
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@kernel.org> --- 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
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