On 17/01/2018 11:03, Florian Weimer wrote:
> On 01/17/2018 10:48 AM, Martin Schwidefsky wrote:
>> rc = syscall(__NR_s390_modify_bp);
>> if (rc) {
>> perror("s390_modify_bp");
>> exit(EXIT_FAILURE);
>> }
>
> Isn't this traditionally done through personality or prctl?
>
> This looks like something other architectures may want as well.
Yes, Intel would want to have a prctl or similar to enable STIBP
(single-thread indirect branch predictor).
Paolo
