hwcap_AES     = 1 << 3
	hwcap_PMULL   = 1 << 4
	hwcap_SHA1    = 1 << 5
	hwcap_SHA2    = 1 << 6
	hwcap_CRC32   = 1 << 7
	hwcap_ATOMICS = 1 << 8
	hwcap_CPUID   = 1 << 11
	hwcap_SHA512  = 1 << 21
)

func hwcapInit(os string) {
	// HWCap was populated by the runtime from the auxiliary vector.
	// Use HWCap information since reading aarch64 system registers
	// is not supported in user space on older linux kernels.