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crypto: aesni - Move ghash_mul to GCM_COMPLETE
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>
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1 changed files with 9 additions and 1 deletions
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@ -346,7 +346,6 @@ _zero_cipher_left_\@:
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pxor %xmm0, %xmm8
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.endif
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GHASH_MUL %xmm8, %xmm13, %xmm9, %xmm10, %xmm11, %xmm5, %xmm6
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movdqu %xmm8, AadHash(%arg2)
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.ifc \operation, enc
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# GHASH computation for the last <16 byte block
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@ -379,6 +378,15 @@ _multiple_of_16_bytes_\@:
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.macro GCM_COMPLETE
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movdqu AadHash(%arg2), %xmm8
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movdqu HashKey(%rsp), %xmm13
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mov PBlockLen(%arg2), %r12
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cmp $0, %r12
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je _partial_done\@
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GHASH_MUL %xmm8, %xmm13, %xmm9, %xmm10, %xmm11, %xmm5, %xmm6
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_partial_done\@:
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mov AadLen(%arg2), %r12 # %r13 = aadLen (number of bytes)
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shl $3, %r12 # convert into number of bits
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movd %r12d, %xmm15 # len(A) in %xmm15
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