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* [PATCH] crypto: arm/aes-neonbs - fix issue with v2.22 and older assembler
@ 2017-01-19 12:23 Ard Biesheuvel
  2017-01-23 14:59 ` Herbert Xu
  0 siblings, 1 reply; 2+ messages in thread
From: Ard Biesheuvel @ 2017-01-19 12:23 UTC (permalink / raw)
  To: linux-crypto, herbert; +Cc: arnd, paul.gortmaker, Ard Biesheuvel

The GNU assembler for ARM version 2.22 or older fails to infer the
element size from the vmov instructions, and aborts the build in
the following way;

.../aes-neonbs-core.S: Assembler messages:
.../aes-neonbs-core.S:817: Error: bad type for scalar -- `vmov q1h[1],r10'
.../aes-neonbs-core.S:817: Error: bad type for scalar -- `vmov q1h[0],r9'
.../aes-neonbs-core.S:817: Error: bad type for scalar -- `vmov q1l[1],r8'
.../aes-neonbs-core.S:817: Error: bad type for scalar -- `vmov q1l[0],r7'
.../aes-neonbs-core.S:818: Error: bad type for scalar -- `vmov q2h[1],r10'
.../aes-neonbs-core.S:818: Error: bad type for scalar -- `vmov q2h[0],r9'
.../aes-neonbs-core.S:818: Error: bad type for scalar -- `vmov q2l[1],r8'
.../aes-neonbs-core.S:818: Error: bad type for scalar -- `vmov q2l[0],r7'

Fix this by setting the element size explicitly, by replacing vmov with
vmov.32.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
---
Please add to the cryptodev-2.6 queue for v4.11

 arch/arm/crypto/aes-neonbs-core.S | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/arm/crypto/aes-neonbs-core.S b/arch/arm/crypto/aes-neonbs-core.S
index c9477044fbba..12da247164d1 100644
--- a/arch/arm/crypto/aes-neonbs-core.S
+++ b/arch/arm/crypto/aes-neonbs-core.S
@@ -766,13 +766,13 @@ ENTRY(aesbs_cbc_decrypt)
 ENDPROC(aesbs_cbc_decrypt)
 
 	.macro		next_ctr, q
-	vmov		\q\()h[1], r10
+	vmov.32		\q\()h[1], r10
 	adds		r10, r10, #1
-	vmov		\q\()h[0], r9
+	vmov.32		\q\()h[0], r9
 	adcs		r9, r9, #0
-	vmov		\q\()l[1], r8
+	vmov.32		\q\()l[1], r8
 	adcs		r8, r8, #0
-	vmov		\q\()l[0], r7
+	vmov.32		\q\()l[0], r7
 	adc		r7, r7, #0
 	vrev32.8	\q, \q
 	.endm
-- 
2.7.4

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2017-01-19 12:23 [PATCH] crypto: arm/aes-neonbs - fix issue with v2.22 and older assembler Ard Biesheuvel
2017-01-23 14:59 ` Herbert Xu

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