perf record doesn't work on rtd129x SoC

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Hi Andreas Färber!

I use "perf record" to debug performance issue on RTD1296 SOC, it does't work, but
the "perf stat" is ok!

After some dig in the kernel, I find the reason is no pmu overflow interrupt, I think
below pmu configuration isn't right for RTD1296:
        arm_pmu: arm-pmu {
                compatible = "arm,cortex-a53-pmu";
                interrupts = <GIC_SPI 48 IRQ_TYPE_LEVEL_HIGH>;

We need 4 PMU SPI for RTD1296 (4 cores), and I guess the 48 isn't right too.

Any suggestion is welcome.


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