...ned long * , for the "get" operations. Subfunctions for both x86 and x86-64 are: ARCH_SET_CPUID (since Linux 4.12) Enable ( addr != 0 ) or disable ( addr == 0 ) the cpuid instru…...X configuration option. You can check whether the CPU supports MPX by looking for the mpx CPUID bit, like with the following command: cat /proc/cpuinfo | grep ' mpx ' A thread m…