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MIPS: Add FPU emulator counter for emulated delay slots.

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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>
This commit is contained in:
David Daney 2014-12-03 11:12:23 -08:00 • committed by Ralf Baechle
parent 7d168923a3
commit 2707cd293c
3 changed files with 3 additions and 1 deletions
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1
arch/mips/include/asm/fpu_emulator.h
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@ -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);