On Fri, Dec 27, 2019 at 02:34:32PM +0000, Kevin Brodsky wrote: > Not just related to this patch, but here goes. While trying to debug an > MTE-enabled process, I realised that there's no way to tell the tagged addr > / MTE thread configuration from outside of the thread. At this point I > thought it'd be really nice if this were to be exposed in /proc/pid, maybe > in /proc/pid/status. Unfortunately there seems to be no precedent for an > arch-specific feature to be exposed there. I guess a ptrace call would work > as well, although it wouldn't be as practical without using a debugger. There is proc_pid_arch_status(), currently only used by x86 to report the avx512 status. We could do the same on arm64 and provide information information on the MTE status, SVE configuration, ptrauth. I think this can be a separate patch covering all these. -- Catalin
