linux-kernel - perf record doesn't work on rtd129x SoC

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Date:   Wed, 4 Dec 2019 12:55:59 +0800
From:   Wang YanQing <udknight@...il.com>
To:     afaerber@...e.de
Cc:     linux-kernel@...r.kernel.org, linux-soc@...r.kernel.org,
        linux-realtek-soc@...ts.infradead.org
Subject: perf record doesn't work on rtd129x SoC

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.

Thanks!