In this patch series, we introduce AES CBC encryption that is parallelized on x86_64 cpu with AVX2. The multi-buffer technique takes advantage of wide AVX2 register and encrypt 8 data streams in parallel with SIMD instructions. Decryption is handled as in the existing AESNI Intel CBC implementation which can already parallelize decryption even for a single data stream. Please see the multi-buffer whitepaper for details of the technique: http://www.intel.com/content/www/us/en/communications/communications-ia-multi-buffer-paper.html It is important that any driver uses this algorithm properly for scenarios where we have many data streams that can fill up the data lanes most of the time. It shouldn't be used when only a single data stream is expected mostly. Otherwise we may incurr extra delays when we have frequent gaps in data lanes, causing us to wait till data come in to fill the data lanes before initiating encryption. We may have to wait for flush operations to commence when no new data come in after some wait time. However we keep this extra delay to a minimum by opportunistically flushing the unfinished jobs if crypto daemon is the only active task running on a cpu. By using this technique, we saw a throughput increase of up to 5.8x under optimal conditions when we have fully loaded encryption jobs filling up all the data lanes. Tim Chen (5): crypto: Multi-buffer encryptioin infrastructure support crypto: AES CBC multi-buffer data structures crypto: AES CBC multi-buffer scheduler crypto: AES CBC by8 encryption crypto: AES CBC multi-buffer glue code arch/x86/crypto/Makefile | 1 + arch/x86/crypto/aes-cbc-mb/Makefile | 22 + arch/x86/crypto/aes-cbc-mb/aes_cbc_enc_x8.S | 774 +++++++++++++++++++ arch/x86/crypto/aes-cbc-mb/aes_cbc_mb.c | 815 +++++++++++++++++++++ arch/x86/crypto/aes-cbc-mb/aes_cbc_mb_ctx.h | 96 +++ arch/x86/crypto/aes-cbc-mb/aes_cbc_mb_mgr.h | 131 ++++ arch/x86/crypto/aes-cbc-mb/aes_mb_mgr_init.c | 145 ++++ arch/x86/crypto/aes-cbc-mb/mb_mgr_datastruct.S | 270 +++++++ arch/x86/crypto/aes-cbc-mb/mb_mgr_inorder_x8_asm.S | 222 ++++++ arch/x86/crypto/aes-cbc-mb/mb_mgr_ooo_x8_asm.S | 416 +++++++++++ arch/x86/crypto/aes-cbc-mb/reg_sizes.S | 125 ++++ crypto/Kconfig | 16 + crypto/blkcipher.c | 29 +- crypto/mcryptd.c | 256 ++++++- crypto/scatterwalk.c | 7 + include/crypto/algapi.h | 1 + include/crypto/mcryptd.h | 36 + include/crypto/scatterwalk.h | 6 + include/linux/crypto.h | 1 + 19 files changed, 3364 insertions(+), 5 deletions(-) create mode 100644 arch/x86/crypto/aes-cbc-mb/Makefile create mode 100644 arch/x86/crypto/aes-cbc-mb/aes_cbc_enc_x8.S create mode 100644 arch/x86/crypto/aes-cbc-mb/aes_cbc_mb.c create mode 100644 arch/x86/crypto/aes-cbc-mb/aes_cbc_mb_ctx.h create mode 100644 arch/x86/crypto/aes-cbc-mb/aes_cbc_mb_mgr.h create mode 100644 arch/x86/crypto/aes-cbc-mb/aes_mb_mgr_init.c create mode 100644 arch/x86/crypto/aes-cbc-mb/mb_mgr_datastruct.S create mode 100644 arch/x86/crypto/aes-cbc-mb/mb_mgr_inorder_x8_asm.S create mode 100644 arch/x86/crypto/aes-cbc-mb/mb_mgr_ooo_x8_asm.S create mode 100644 arch/x86/crypto/aes-cbc-mb/reg_sizes.S -- 1.7.11.7 -- To unsubscribe from this list: send the line "unsubscribe linux-crypto" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
