From: Tianjia Zhang > Sent: 18 August 2021 04:31 > > This patchsets exported some of the common functions implemented by > the SM4 AESNI/AVX algorithm, and reused these functions to achieve > the acceleration of AESNI/AVX2 implementation. These functions need bracketing by kernel_fpu_enable() (or whatever it is called.) That will significantly affect the performance. Also the functions look pretty big (I don't know how big the generic ones are) and will take time to load into the I$ and will displace other code. So while a hot-cache benchmark might show improvements for repeated calls is isn't obvious that any significant gain will be made for real-life calls which could easily be of single buffers. David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales)
