linux-kernel - Re: [PATCH] arm64: dts: ti: k3*: Fixup PMU compatibility to be CPU specific

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Message-ID: <dbd31e85-fc72-1a94-f143-6ed0777ffa9a@ti.com>
Date:   Wed, 20 Jan 2021 14:49:58 -0600
From:   Suman Anna <s-anna@...com>
To:     Nishanth Menon <nm@...com>, Sudeep Holla <sudeep.holla@....com>,
        Dave Gerlach <d-gerlach@...com>
CC:     Tero Kristo <kristo@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] arm64: dts: ti: k3*: Fixup PMU compatibility to be CPU
 specific

On 1/20/21 1:51 PM, Nishanth Menon wrote:
> We can use CPU specific pmu configuration to expose the appropriate
> CPU specific events rather than just the basic generic pmuv3 perf
> events.
> 
> Reported-by: Sudeep Holla <sudeep.holla@....com>
> Signed-off-by: Nishanth Menon <nm@...com>

Tested-by: Suman Anna <s-anna@...com>

regards
Suman

> ---
> 
> AM65: https://pastebin.ubuntu.com/p/TF2cCMySkt/
> J721E: https://pastebin.ubuntu.com/p/jgGPNmNgG3/
> J7200: https://pastebin.ubuntu.com/p/Kfc3VHHXNB/
> 
> Original report: https://lore.kernel.org/linux-arm-kernel/20210119172412.smsjdo2sjzqi5vcn@bogus/
> 
> I have'nt split this patch up for fixes tag primarily because the
> basic functionality works and this is an improvement than a critical
> fixup to backport for older kernels.
> 
>  arch/arm64/boot/dts/ti/k3-am65.dtsi  | 2 +-
>  arch/arm64/boot/dts/ti/k3-j7200.dtsi | 2 +-
>  arch/arm64/boot/dts/ti/k3-j721e.dtsi | 2 +-
>  3 files changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/ti/k3-am65.dtsi b/arch/arm64/boot/dts/ti/k3-am65.dtsi
> index d84c0bc05023..a9fc1af03f27 100644
> --- a/arch/arm64/boot/dts/ti/k3-am65.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-am65.dtsi
> @@ -56,7 +56,7 @@ a53_timer0: timer-cl0-cpu0 {
>  	};
>  
>  	pmu: pmu {
> -		compatible = "arm,armv8-pmuv3";
> +		compatible = "arm,cortex-a53-pmu";
>  		/* Recommendation from GIC500 TRM Table A.3 */
>  		interrupts = <GIC_PPI 7 IRQ_TYPE_LEVEL_HIGH>;
>  	};
> diff --git a/arch/arm64/boot/dts/ti/k3-j7200.dtsi b/arch/arm64/boot/dts/ti/k3-j7200.dtsi
> index 66169bcf7c9a..b7005b803149 100644
> --- a/arch/arm64/boot/dts/ti/k3-j7200.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-j7200.dtsi
> @@ -114,7 +114,7 @@ a72_timer0: timer-cl0-cpu0 {
>  	};
>  
>  	pmu: pmu {
> -		compatible = "arm,armv8-pmuv3";
> +		compatible = "arm,cortex-a72-pmu";
>  		interrupts = <GIC_PPI 7 IRQ_TYPE_LEVEL_HIGH>;
>  	};
>  
> diff --git a/arch/arm64/boot/dts/ti/k3-j721e.dtsi b/arch/arm64/boot/dts/ti/k3-j721e.dtsi
> index cc483f7344af..f0587fde147e 100644
> --- a/arch/arm64/boot/dts/ti/k3-j721e.dtsi
> +++ b/arch/arm64/boot/dts/ti/k3-j721e.dtsi
> @@ -115,7 +115,7 @@ a72_timer0: timer-cl0-cpu0 {
>  	};
>  
>  	pmu: pmu {
> -		compatible = "arm,armv8-pmuv3";
> +		compatible = "arm,cortex-a72-pmu";
>  		/* Recommendation from GIC500 TRM Table A.3 */
>  		interrupts = <GIC_PPI 7 IRQ_TYPE_LEVEL_HIGH>;
>  	};
>