4.20-stable review patch. If anyone has any objections, please let me know.
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From: Eugeniy Paltsev Eugeniy.Paltsev@synopsys.com
commit 3affbf0e154ee351add6fcc254c59c3f3947fa8f upstream.
So far we've mapped branches to "ijmp" which also counts conditional branches NOT taken. This makes us different from other architectures such as ARM which seem to be counting only taken branches.
So use "ijmptak" hardware condition which only counts (all jump instructions that are taken)
'ijmptak' event is available on both ARCompact and ARCv2 ISA based cores.
Signed-off-by: Eugeniy Paltsev Eugeniy.Paltsev@synopsys.com Cc: stable@vger.kernel.org Signed-off-by: Vineet Gupta vgupta@synopsys.com [vgupta: reworked changelog] Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- arch/arc/include/asm/perf_event.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/arch/arc/include/asm/perf_event.h +++ b/arch/arc/include/asm/perf_event.h @@ -103,7 +103,8 @@ static const char * const arc_pmu_ev_hw_
/* counts condition */ [PERF_COUNT_HW_INSTRUCTIONS] = "iall", - [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = "ijmp", /* Excludes ZOL jumps */ + /* All jump instructions that are taken */ + [PERF_COUNT_HW_BRANCH_INSTRUCTIONS] = "ijmptak", [PERF_COUNT_ARC_BPOK] = "bpok", /* NP-NT, PT-T, PNT-NT */ #ifdef CONFIG_ISA_ARCV2 [PERF_COUNT_HW_BRANCH_MISSES] = "bpmp",