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crypto: aesni - Move ghash_mul to GCM_COMPLETE

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Prepare to handle partial blocks between scatter/gather calls.
For the last partial block, we only want to calculate the aadhash
in GCM_COMPLETE, and a new partial block macro will handle both
aadhash update and encrypting partial blocks between calls.

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 2018-12-10 19:59:11 +00:00 committed by Herbert Xu
parent a44b419fe5
commit 517a448e09
1 changed files with 10 additions and 4 deletions
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14
arch/x86/crypto/aesni-intel_avx-x86_64.S
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@ -488,8 +488,7 @@ _final_ghash_mul\@:
vpand %xmm1, %xmm2, %xmm2
vpshufb SHUF_MASK(%rip), %xmm2, %xmm2
vpxor %xmm2, %xmm14, %xmm14
#GHASH computation for the last <16 Byte block
\GHASH_MUL %xmm14, %xmm13, %xmm0, %xmm10, %xmm11, %xmm5, %xmm6
vmovdqu %xmm14, AadHash(arg2)
sub %r13, %r11
add $16, %r11
@ -500,8 +499,7 @@ _final_ghash_mul\@:
vpand %xmm1, %xmm9, %xmm9 # mask out top 16-r13 bytes of xmm9
vpshufb SHUF_MASK(%rip), %xmm9, %xmm9
vpxor %xmm9, %xmm14, %xmm14
#GHASH computation for the last <16 Byte block
\GHASH_MUL %xmm14, %xmm13, %xmm0, %xmm10, %xmm11, %xmm5, %xmm6
vmovdqu %xmm14, AadHash(arg2)
sub %r13, %r11
add $16, %r11
@ -541,6 +539,14 @@ _multiple_of_16_bytes\@:
vmovdqu AadHash(arg2), %xmm14
vmovdqu HashKey(arg2), %xmm13
mov PBlockLen(arg2), %r12
cmp $0, %r12
je _partial_done\@
#GHASH computation for the last <16 Byte block
\GHASH_MUL %xmm14, %xmm13, %xmm0, %xmm10, %xmm11, %xmm5, %xmm6
_partial_done\@:
mov AadLen(arg2), %r12 # r12 = aadLen (number of bytes)
shl $3, %r12 # convert into number of bits
vmovd %r12d, %xmm15 # len(A) in xmm15