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. Passes my TLS tests. IPSec or testing of other aesni users would be appreciated. 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 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 | 263 ++++++- 2 files changed, 932 insertions(+), 745 deletions(-) -- 2.9.5
