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MIPS: math-emu: Add FP emu debugfs statistics for branches 

Add FP emu debugfs counter for branches.

The new counter is displayed the same way as existing counter, and
its default path is /sys/kernel/debug/mips/fpuemustats/.

The limitation of this counter is that it counts only R6 branch
instructions BC1NEZ and BC1EQZ.

Signed-off-by: Miodrag Dinic <miodrag.dinic@imgtec.com>
Signed-off-by: Goran Ferenc <goran.ferenc@imgtec.com>
Signed-off-by: Aleksandar Markovic <aleksandar.markovic@imgtec.com>
Cc: Douglas Leung <douglas.leung@imgtec.com>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Maciej W. Rozycki <macro@imgtec.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Petar Jovanovic <petar.jovanovic@imgtec.com>
Cc: Raghu Gandham <raghu.gandham@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/17143/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
hifive-unleashed-5.1
Aleksandar Markovic 2017-08-21 14:24:50 +02:00 committed by Ralf Baechle
parent e1231dd6b1
commit ae5f3f5b81
3 changed files with 3 additions and 0 deletions
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1
arch/mips/include/asm/fpu_emulator.h
View File

@ -36,6 +36,7 @@ struct mips_fpu_emulator_stats {
unsigned long emulated;
unsigned long loads;
unsigned long stores;
unsigned long branches;
unsigned long cp1ops;
unsigned long cp1xops;
unsigned long errors;

1
arch/mips/math-emu/cp1emu.c
View File

@ -1230,6 +1230,7 @@ emul:
break;
}
branch_common:
MIPS_FPU_EMU_INC_STATS(branches);
set_delay_slot(xcp);
if (cond) {
/*

1
arch/mips/math-emu/me-debugfs.c
View File

@ -53,6 +53,7 @@ do { \
FPU_STAT_CREATE(emulated);
FPU_STAT_CREATE(loads);
FPU_STAT_CREATE(stores);
FPU_STAT_CREATE(branches);
FPU_STAT_CREATE(cp1ops);
FPU_STAT_CREATE(cp1xops);
FPU_STAT_CREATE(errors);