Doorbell IRQ

[bogdantanasa]

Hi,

Is there any way to prevent a specific core (of T4240) to get interrupted by the doorbell IRQs? Has Linux yocto some API which can help?

Thanks,

Bogdan.

[yipingwang]

Please refer to the following in arch/powerpc/platforms/85xx/smp.c.

static void smp_85xx_basic_setup(int cpu_nr)
{
        if (cpu_has_feature(CPU_FTR_DBELL))
                doorbell_setup_this_cpu();
}

Have a great day,
Yiping

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[weissermagier]

Hello Bogdan,

i have no idea about an api but i reduce the amount of doorbell's a lot with following kernel option:

# CONFIG_IRQ_ALL_CPUS is not set

This option was set by Default.

Have a nice day