This patch set refactors the x86 aes/gcm SSE crypto routines to
support true scatter/gather by adding gcm_enc/dec_update methods.
The layout is:
* First 5 patches refactor the code to use macros, so changes only
need to be applied once for encode and decode. There should be no
functional changes.
* The next 6 patches introduce a gcm_context structure to be passed
between scatter/gather calls to maintain state. The struct is also
used as scratch space for the existing enc/dec routines.
* The last 2 set up the asm function entry points for scatter gather
support, and then call the new routines per buffer in the passed in
sglist in aesni-intel_glue.
Testing:
asm itself fuzz tested vs. existing code and isa-l asm.
Ran libkcapi test suite, passes.
perf of a large (16k messages) TLS sends sg vs. no sg:
no-sg
33287255597 cycles
53702871176 instructions
43.47% _crypt_by_4
17.83% memcpy
16.36% aes_loop_par_enc_done
sg
27568944591 cycles
54580446678 instructions
49.87% _crypt_by_4
17.40% aes_loop_par_enc_done
1.79% aes_loop_initial_5416
1.52% aes_loop_initial_4974
1.27% gcmaes_encrypt_sg.constprop.15
V1 -> V2:
patch 14: merge enc/dec
also use new routine if cryptlen < AVX_GEN2_OPTSIZE
optimize case if assoc is already linear
Dave Watson (14):
x86/crypto: aesni: Merge INITIAL_BLOCKS_ENC/DEC
x86/crypto: aesni: Macro-ify func save/restore
x86/crypto: aesni: Add GCM_INIT macro
x86/crypto: aesni: Add GCM_COMPLETE macro
x86/crypto: aesni: Merge encode and decode to GCM_ENC_DEC macro
x86/crypto: aesni: Introduce gcm_context_data
x86/crypto: aesni: Split AAD hash calculation to separate macro
x86/crypto: aesni: Fill in new context data structures
x86/crypto: aesni: Move ghash_mul to GCM_COMPLETE
x86/crypto: aesni: Move HashKey computation from stack to gcm_context
x86/crypto: aesni: Introduce partial block macro
x86/crypto: aesni: Add fast path for > 16 byte update
x86/crypto: aesni: Introduce scatter/gather asm function stubs
x86/crypto: aesni: Update aesni-intel_glue to use scatter/gather
arch/x86/crypto/aesni-intel_asm.S | 1414 ++++++++++++++++++------------------
arch/x86/crypto/aesni-intel_glue.c | 230 +++++-
2 files changed, 899 insertions(+), 745 deletions(-)
--
2.9.5
