From: Aleksandar Markovic <aleksandar.markovic@imgtec.com>
Date: Mon, 21 Aug 2017 12:24:50 +0000 (+0200)
Subject: MIPS: math-emu: Add FP emu debugfs statistics for branches
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=ae5f3f5b81dd2c776f0ad49d6d121ce1255b35eb;p=openwrt%2Fstaging%2Fblogic.git

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>
---

diff --git a/arch/mips/include/asm/fpu_emulator.h b/arch/mips/include/asm/fpu_emulator.h
index 8e50fa3623e3..4c8ab2739aae 100644
--- a/arch/mips/include/asm/fpu_emulator.h
+++ b/arch/mips/include/asm/fpu_emulator.h
@@ -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;
diff --git a/arch/mips/math-emu/cp1emu.c b/arch/mips/math-emu/cp1emu.c
index a4df2200c725..a1f06ad01759 100644
--- a/arch/mips/math-emu/cp1emu.c
+++ b/arch/mips/math-emu/cp1emu.c
@@ -1230,6 +1230,7 @@ emul:
 				break;
 			}
 branch_common:
+			MIPS_FPU_EMU_INC_STATS(branches);
 			set_delay_slot(xcp);
 			if (cond) {
 				/*
diff --git a/arch/mips/math-emu/me-debugfs.c b/arch/mips/math-emu/me-debugfs.c
index be650ed7db59..78b26c8dc697 100644
--- a/arch/mips/math-emu/me-debugfs.c
+++ b/arch/mips/math-emu/me-debugfs.c
@@ -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);