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crypto: arm64/aes-neon - move literal data to .rodata section 

Move the S-boxes and some other literals to the .rodata section where
it is safe from being exploited by speculative execution.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Ard Biesheuvel 2018-01-10 12:11:38 +00:00 committed by Herbert Xu
parent 96a74f7bdc
commit 62c2470876
1 changed files with 4 additions and 4 deletions
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8
arch/arm64/crypto/aes-neon.S
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@ -32,10 +32,10 @@
/* preload the entire Sbox */
.macro prepare, sbox, shiftrows, temp
adr \temp, \sbox
movi v12.16b, #0x1b
ldr q13, \shiftrows
ldr q14, .Lror32by8
ldr_l q13, \shiftrows, \temp
ldr_l q14, .Lror32by8, \temp
adr_l \temp, \sbox
ld1 {v16.16b-v19.16b}, [\temp], #64
ld1 {v20.16b-v23.16b}, [\temp], #64
ld1 {v24.16b-v27.16b}, [\temp], #64
@ -272,7 +272,7 @@
#include "aes-modes.S"
.text
.section ".rodata", "a"
.align 6
.LForward_Sbox:
.byte 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5