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crypto: aesni - Macro-ify func save/restore 

Macro-ify function save and restore.  These will be used in new functions
added for scatter/gather update operations.

Signed-off-by: Dave Watson <davejwatson@fb.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
This commit is contained in:
Dave Watson 2018-02-14 09:38:35 -08:00 committed by Herbert Xu
parent e1fd316fba
commit 6c2c86b3e0
1 changed files with 24 additions and 29 deletions
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53
arch/x86/crypto/aesni-intel_asm.S
View File

@ -171,6 +171,26 @@ ALL_F: .octa 0xffffffffffffffffffffffffffffffff
#define TKEYP T1
#endif
.macro FUNC_SAVE
push %r12
push %r13
push %r14
mov %rsp, %r14
#
# states of %xmm registers %xmm6:%xmm15 not saved
# all %xmm registers are clobbered
#
sub $VARIABLE_OFFSET, %rsp
and $~63, %rsp
.endm
.macro FUNC_RESTORE
mov %r14, %rsp
pop %r14
pop %r13
pop %r12
.endm
#ifdef __x86_64__
/* GHASH_MUL MACRO to implement: Data*HashKey mod (128,127,126,121,0)
@ -1131,16 +1151,7 @@ _esb_loop_\@:
*
*****************************************************************************/
ENTRY(aesni_gcm_dec)
push %r12
push %r13
push %r14
mov %rsp, %r14
/*
* states of %xmm registers %xmm6:%xmm15 not saved
* all %xmm registers are clobbered
*/
sub $VARIABLE_OFFSET, %rsp
and $~63, %rsp # align rsp to 64 bytes
FUNC_SAVE
mov %arg6, %r12
movdqu (%r12), %xmm13 # %xmm13 = HashKey
movdqa SHUF_MASK(%rip), %xmm2
@ -1310,10 +1321,7 @@ _T_1_decrypt:
_T_16_decrypt:
movdqu %xmm0, (%r10)
_return_T_done_decrypt:
mov %r14, %rsp
pop %r14
pop %r13
pop %r12
FUNC_RESTORE
ret
ENDPROC(aesni_gcm_dec)
@ -1394,22 +1402,12 @@ ENDPROC(aesni_gcm_dec)
* poly = x^128 + x^127 + x^126 + x^121 + 1
***************************************************************************/
ENTRY(aesni_gcm_enc)
push %r12
push %r13
push %r14
mov %rsp, %r14
#
# states of %xmm registers %xmm6:%xmm15 not saved
# all %xmm registers are clobbered
#
sub $VARIABLE_OFFSET, %rsp
and $~63, %rsp
FUNC_SAVE
mov %arg6, %r12
movdqu (%r12), %xmm13
movdqa SHUF_MASK(%rip), %xmm2
PSHUFB_XMM %xmm2, %xmm13
# precompute HashKey<<1 mod poly from the HashKey (required for GHASH)
movdqa %xmm13, %xmm2
@ -1577,10 +1575,7 @@ _T_1_encrypt:
_T_16_encrypt:
movdqu %xmm0, (%r10)
_return_T_done_encrypt:
mov %r14, %rsp
pop %r14
pop %r13
pop %r12
FUNC_RESTORE
ret
ENDPROC(aesni_gcm_enc)