On Tue, Apr 13, 2021 at 12:05 PM <kan.li...@linux.intel.com> wrote: > > From: Kan Liang <kan.li...@linux.intel.com> > > The counter value of a perf task may leak to another RDPMC task. > For example, a perf stat task as below is running on CPU 0. > > perf stat -e 'branches,cycles' -- taskset -c 0 ./workload
I assume this doesn't fix the leak if the sensitive counter is systemwide? Could Intel please add proper security and ideally virtualization for this? Ideally RDPMC permission would be a bitmask for all RDPMC-able counters, not just a single on/off switch. -Andy
