Christian Borntraeger wrote: >We do have both variants (crc32 and crc32c) as vector code in >the kernel
Yes, this support was introduced in Linux kernel 4.8 which was released in October, 2016. It requires a z13 processor or higher. It's perhaps possible a distributor backported this feature to a prior kernel release, although I don't know whether that happened. It's also possible to build a 4.8 or higher kernel without this support (if CONFIG_CRYPTO_CRC32_S390 is not selected as a kernel build option). The 2016 code commits are available here: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=19c93787f573c6cffe9c25d3be20e3b40112b7ea https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f848dbd3bc1a71274241c080b57eb912ff9f0098 -------------------------------------------------------------------------------------------------------- Timothy Sipples IT Architect Executive, Industry Solutions, IBM Z & LinuxONE E-Mail: sipp...@sg.ibm.com ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to lists...@vm.marist.edu with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390 ---------------------------------------------------------------------- For more information on Linux on System z, visit http://wiki.linuxvm.org/
