HWCAP for SHA-1 and SHA-256

Hi Everyone, I'm having trouble finding the HWCAP_* or HWCAP2_* for SHA-1 and SHA-256 on x86 machines. Poking around Torvald's GitHub does not reveal them in either auxvec.h or hwcap2.h. Also see https://github.com/torvalds/linux/tree/master/arch/x86/include/uapi/asm. Grepping my local machine (x86_64) provides them for arm64, but not x86 (WTF?): $ grep -IR HWCAP2_ /usr/include /usr/include/x86_64-linux-gnu/asm/hwcap2.h:#ifndef _ASM_X86_HWCAP2_H /usr/include/x86_64-linux-gnu/asm/hwcap2.h:#define _ASM_X86_HWCAP2_H /usr/include/x86_64-linux-gnu/asm/hwcap2.h:#define HWCAP2_RING3MWAIT (1 << 0) What are the HWCAP_* or HWCAP2_* to use for SHA-1 and SHA-256 on x86 machines? Thanks in advance.