diff options
| author | David Daney <david.daney@cavium.com> | 2014-12-03 19:12:23 (GMT) |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2015-04-01 15:21:57 (GMT) |
| commit | 2707cd293cc2386f8eea6fee1ba72e8b190f25cc (patch) | |
| tree | eaf18d32c09f61a82a2bf33746a8d93c7567753a /arch | |
| parent | 7d168923a35551ed6572d02a0f159e7d61f62cfc (diff) | |
| download | linux-2707cd293cc2386f8eea6fee1ba72e8b190f25cc.tar.xz | |
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')
| -rw-r--r-- | arch/mips/include/asm/fpu_emulator.h | 1 | ||||
| -rw-r--r-- | arch/mips/math-emu/dsemul.c | 2 | ||||
| -rw-r--r-- | arch/mips/math-emu/me-debugfs.c | 1 |
3 files changed, 3 insertions, 1 deletions
diff --git a/arch/mips/include/asm/fpu_emulator.h b/arch/mips/include/asm/fpu_emulator.h index 3ee3477..6370c82 100644 --- a/arch/mips/include/asm/fpu_emulator.h +++ b/arch/mips/include/asm/fpu_emulator.h @@ -44,6 +44,7 @@ struct mips_fpu_emulator_stats { unsigned long ieee754_overflow; unsigned long ieee754_zerodiv; unsigned long ieee754_invalidop; + unsigned long ds_emul; }; DECLARE_PER_CPU(struct mips_fpu_emulator_stats, fpuemustats); diff --git a/arch/mips/math-emu/dsemul.c b/arch/mips/math-emu/dsemul.c index 4f514f3..58f5818 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 becdd63..f308e0f 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; } |