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crypto: arm/aes-scalar - switch to common rev_l/mov_l macros

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The scalar AES implementation has some locally defined macros which
reimplement things that are now available in macros defined in
assembler.h. So let's switch to those.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Nicolas Pitre <nico@fluxnic.net>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Ard Biesheuvel 2021-03-10 11:14:20 +01:00 committed by Herbert Xu
parent d2f2516a38
commit d5adb9d1f7
1 changed files with 10 additions and 32 deletions
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42
arch/arm/crypto/aes-cipher-core.S
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@ -99,28 +99,6 @@
__hround \out2, \out3, \in2, \in1, \in0, \in3, \in1, \in0, 0, \sz, \op, \oldcpsr
.endm
.macro __rev, out, in
.if __LINUX_ARM_ARCH__ < 6
lsl t0, \in, #24
and t1, \in, #0xff00
and t2, \in, #0xff0000
orr \out, t0, \in, lsr #24
orr \out, \out, t1, lsl #8
orr \out, \out, t2, lsr #8
.else
rev \out, \in
.endif
.endm
.macro __adrl, out, sym, c
.if __LINUX_ARM_ARCH__ < 7
ldr\c \out, =\sym
.else
movw\c \out, #:lower16:\sym
movt\c \out, #:upper16:\sym
.endif
.endm
.macro do_crypt, round, ttab, ltab, bsz
push {r3-r11, lr}
@ -133,10 +111,10 @@
ldr r7, [in, #12]
#ifdef CONFIG_CPU_BIG_ENDIAN
__rev r4, r4
__rev r5, r5
__rev r6, r6
__rev r7, r7
rev_l r4, t0
rev_l r5, t0
rev_l r6, t0
rev_l r7, t0
#endif
eor r4, r4, r8
@ -144,7 +122,7 @@
eor r6, r6, r10
eor r7, r7, r11
__adrl ttab, \ttab
mov_l ttab, \ttab
/*
* Disable interrupts and prefetch the 1024-byte 'ft' or 'it' table into
* L1 cache, assuming cacheline size >= 32. This is a hardening measure
@ -180,7 +158,7 @@
2: .ifb \ltab
add ttab, ttab, #1
.else
__adrl ttab, \ltab
mov_l ttab, \ltab
// Prefetch inverse S-box for final round; see explanation above
.set i, 0
.rept 256 / 64
@ -194,10 +172,10 @@
\round r4, r5, r6, r7, r8, r9, r10, r11, \bsz, b, rounds
#ifdef CONFIG_CPU_BIG_ENDIAN
__rev r4, r4
__rev r5, r5
__rev r6, r6
__rev r7, r7
rev_l r4, t0
rev_l r5, t0
rev_l r6, t0
rev_l r7, t0
#endif
ldr out, [sp]