Commit f5943ef4 authored by Ard Biesheuvel's avatar Ard Biesheuvel Committed by Herbert Xu
Browse files

crypto: arm64/aes-neonbs - remove NEON yield calls 



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: default avatarArd Biesheuvel <ardb@kernel.org>
Signed-off-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
parent 5f6cb2e6

arch/arm64/crypto/aes-neonbs-core.S

+2 −6
Original line number Diff line number Diff line
@@ -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: