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IBS on pre-Zen6 platforms lacked a hardware privilege filter, so the kernel enabled swfilt=1. Zen6 and newer platforms provides privilege filtering via the RIP[63] bit, making swfilt redundant. Skip the perf unit test that assumes IBS has no hardware-assisted privilege filter on Zen6 and newer platforms. swfilt is ignored by kernel on platforms that support RIP[63] bit filter i.e. all amd-ibs-swfilt.sh tests will test hardware assisted privilege filter. Without the patch on Zen6: # sudo ./perf test -vv 77 77: AMD IBS software filtering: --- start --- test child forked, pid 30813 check availability of IBS swfilt run perf record with modifier and swfilt [FAIL] IBS PMU should not accept exclude_kernel ---- end(-1) ---- 77: AMD IBS software filtering : FAILED! With the patch: # ./perf test -vv 77 77: AMD IBS software filtering: --- start --- test child forked, pid 30903 check availability of IBS swfilt run perf record with modifier and swfilt [ perf record: Woken up 2 times to write data ] [ perf record: Captured and wrote 0.000 MB /dev/null ] [ perf record: Woken up 3 times to write data ] [ perf record: Captured and wrote 0.000 MB /dev/null ] [ perf record: Woken up 3 times to write data ] [ perf record: Captured and wrote 0.000 MB /dev/null ] [ perf record: Woken up 1 times to write data ] [ perf record: Captured and wrote 0.000 MB /dev/null ] check number of samples with swfilt [ perf record: Woken up 4 times to write data ] [ perf record: Captured and wrote 0.051 MB - ] [ perf record: Woken up 4 times to write data ] [ perf record: Captured and wrote 0.063 MB - ] ---- end(0) ---- 77: AMD IBS software filtering : Ok Signed-off-by: Ravi Bangoria <ravi.bangoria@amd.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: Ananth Narayan <ananth.narayan@amd.com> Cc: Dapeng Mi <dapeng1.mi@linux.intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@linaro.org> Cc: Manali Shukla <manali.shukla@amd.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sandipan Das <sandipan.das@amd.com> Cc: Santosh Shukla <santosh.shukla@amd.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>