Commit 2707cd29 authored by David Daney's avatar David Daney Committed by Ralf Baechle

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: default avatarDavid Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8634/Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 7d168923
......@@ -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);
......
......@@ -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;
}
......@@ -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;
}
......
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