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authorDavid Daney <david.daney@cavium.com>2014-12-03 20:12:23 +0100
committerRalf Baechle <ralf@linux-mips.org>2015-04-01 17:21:57 +0200
commit2707cd293cc2386f8eea6fee1ba72e8b190f25cc (patch)
treeeaf18d32c09f61a82a2bf33746a8d93c7567753a /arch/mips/math-emu
parentMIPS: Update arch/mips/include/asm/sgi/sgi.h (diff)
downloadlinux-2707cd293cc2386f8eea6fee1ba72e8b190f25cc.tar.xz
linux-2707cd293cc2386f8eea6fee1ba72e8b190f25cc.zip
MIPS: Add FPU emulator counter for emulated delay slots.
Delay slot emulation in the FPU emulator is the only kernel user of an executable stack, it is also very slow. Add a counter so we can see how many of these emulations are done. Signed-off-by: David Daney <david.daney@cavium.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/8634/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/math-emu')
-rw-r--r--arch/mips/math-emu/dsemul.c2
-rw-r--r--arch/mips/math-emu/me-debugfs.c1
2 files changed, 2 insertions, 1 deletions
diff --git a/arch/mips/math-emu/dsemul.c b/arch/mips/math-emu/dsemul.c
index 4f514f3724cb..58f58185f1c4 100644
--- a/arch/mips/math-emu/dsemul.c
+++ b/arch/mips/math-emu/dsemul.c
@@ -158,6 +158,6 @@ int do_dsemulret(struct pt_regs *xcp)
/* Set EPC to return to post-branch instruction */
xcp->cp0_epc = epc;
-
+ MIPS_FPU_EMU_INC_STATS(ds_emul);
return 1;
}
diff --git a/arch/mips/math-emu/me-debugfs.c b/arch/mips/math-emu/me-debugfs.c
index becdd63e14a9..f308e0f05fc5 100644
--- a/arch/mips/math-emu/me-debugfs.c
+++ b/arch/mips/math-emu/me-debugfs.c
@@ -61,6 +61,7 @@ do { \
FPU_STAT_CREATE(ieee754_overflow);
FPU_STAT_CREATE(ieee754_zerodiv);
FPU_STAT_CREATE(ieee754_invalidop);
+ FPU_STAT_CREATE(ds_emul);
return 0;
}