On Sun, Aug 02, 2020 at 12:06:16PM +0300, Ard Biesheuvel wrote: > Ben reports that CCM using AES-NI instructions performs pathologically > poorly, which is due to the overhead of preserving/restoring the SIMD > state, which is repeated after every 16 bytes of input when executing > the CBCMAC portion of the algorithm. > > So let's clone the arm64 implementation of cbcmac(aes), which takes > care to only preserve/restore the SIMD state after processing the > whole input. Since cmac(aes) and xcbc(aes) can reuse most of the code, > let's expose those as well. > > Cc: Ben Greear <gree...@candelatech.com> > Signed-off-by: Ard Biesheuvel <a...@kernel.org> > --- > arch/x86/crypto/Makefile | 2 +- > arch/x86/crypto/aesni-intel.h | 39 +++ > arch/x86/crypto/aesni-intel_glue.c | 42 +--- > arch/x86/crypto/aesni-intel_mac.c | 257 ++++++++++++++++++++ > 4 files changed, 306 insertions(+), 34 deletions(-)
We should just use the accelerated cbc skcipher. Cheers, -- Email: Herbert Xu <herb...@gondor.apana.org.au> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
