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| author | Dave Watson <davejwatson@fb.com> | 2018-12-10 22:59:11 +0300 |
|---|---|---|
| committer | Herbert Xu <herbert@gondor.apana.org.au> | 2018-12-23 06:52:42 +0300 |
| commit | 517a448e09846732d46e983a2195002d05857919 (patch) | |
| tree | d149770889be74d510302d0dfe75390caba16aac /arch/x86/crypto | |
| parent | a44b419fe5aee3bfe12c88698a023cb5c6067985 (diff) | |
| download | linux-517a448e09846732d46e983a2195002d05857919.tar.xz | |
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>
Diffstat (limited to 'arch/x86/crypto')
| -rw-r--r-- | arch/x86/crypto/aesni-intel_avx-x86_64.S | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/arch/x86/crypto/aesni-intel_avx-x86_64.S b/arch/x86/crypto/aesni-intel_avx-x86_64.S index 0a9cdcfdd987..44a4a8b43ca4 100644 --- a/arch/x86/crypto/aesni-intel_avx-x86_64.S +++ b/arch/x86/crypto/aesni-intel_avx-x86_64.S @@ -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 |