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crypto: aesni - Add GCM_COMPLETE macro

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Merge encode and decode tag calculations in GCM_COMPLETE macro.
Scatter/gather routines will call this once at the end of encryption
or decryption.

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 19:57:49 +00:00 committed by Herbert Xu
parent 5350b0f563
commit e377bedb09
1 changed files with 8 additions and 0 deletions
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8
arch/x86/crypto/aesni-intel_avx-x86_64.S
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@ -510,6 +510,14 @@ _less_than_8_bytes_left\@:
#############################
_multiple_of_16_bytes\@:
GCM_COMPLETE \GHASH_MUL \REP
.endm
# GCM_COMPLETE Finishes update of tag of last partial block
# Output: Authorization Tag (AUTH_TAG)
# Clobbers rax, r10-r12, and xmm0, xmm1, xmm5-xmm15
.macro GCM_COMPLETE GHASH_MUL REP
mov arg8, %r12 # r12 = aadLen (number of bytes)
shl $3, %r12 # convert into number of bits
vmovd %r12d, %xmm15 # len(A) in xmm15