diff options
Diffstat (limited to 'arch/mips/kernel/traps.c')
| -rw-r--r-- | arch/mips/kernel/traps.c | 59 |
1 files changed, 29 insertions, 30 deletions
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c index 7e9cb5b1b4a7..c598e890a880 100644 --- a/arch/mips/kernel/traps.c +++ b/arch/mips/kernel/traps.c @@ -752,6 +752,33 @@ asmlinkage void do_ri(struct pt_regs *regs) force_sig(SIGILL, current); } +/* + * MIPS MT processors may have fewer FPU contexts than CPU threads. If we've + * emulated more than some threshold number of instructions, force migration to + * a "CPU" that has FP support. + */ +static void mt_ase_fp_affinity(void) +{ +#ifdef CONFIG_MIPS_MT_FPAFF + if (mt_fpemul_threshold > 0 && + ((current->thread.emulated_fp++ > mt_fpemul_threshold))) { + /* + * If there's no FPU present, or if the application has already + * restricted the allowed set to exclude any CPUs with FPUs, + * we'll skip the procedure. + */ + if (cpus_intersects(current->cpus_allowed, mt_fpu_cpumask)) { + cpumask_t tmask; + + cpus_and(tmask, current->thread.user_cpus_allowed, + mt_fpu_cpumask); + set_cpus_allowed(current, tmask); + current->thread.mflags |= MF_FPUBOUND; + } + } +#endif /* CONFIG_MIPS_MT_FPAFF */ +} + asmlinkage void do_cpu(struct pt_regs *regs) { unsigned int cpid; @@ -785,36 +812,8 @@ asmlinkage void do_cpu(struct pt_regs *regs) ¤t->thread.fpu, 0); if (sig) force_sig(sig, current); -#ifdef CONFIG_MIPS_MT_FPAFF - else { - /* - * MIPS MT processors may have fewer FPU contexts - * than CPU threads. If we've emulated more than - * some threshold number of instructions, force - * migration to a "CPU" that has FP support. - */ - if(mt_fpemul_threshold > 0 - && ((current->thread.emulated_fp++ - > mt_fpemul_threshold))) { - /* - * If there's no FPU present, or if the - * application has already restricted - * the allowed set to exclude any CPUs - * with FPUs, we'll skip the procedure. - */ - if (cpus_intersects(current->cpus_allowed, - mt_fpu_cpumask)) { - cpumask_t tmask; - - cpus_and(tmask, - current->thread.user_cpus_allowed, - mt_fpu_cpumask); - set_cpus_allowed(current, tmask); - current->thread.mflags |= MF_FPUBOUND; - } - } - } -#endif /* CONFIG_MIPS_MT_FPAFF */ + else + mt_ase_fp_affinity(); } return; |