linux-kernel - Re: [PATCH v1] arm64: dts: actions: Fix smp Bringing up secondary CPUs

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Message-ID: <6e42b5fe-8e30-42e9-3cf9-160eb5e0af6f@collabora.com>
Date:   Sun, 5 Jul 2020 18:11:36 -0300
From:   Helen Koike <helen.koike@...labora.com>
To:     Matheus Castello <matheus@...tello.eng.br>, afaerber@...e.de,
        manivannan.sadhasivam@...aro.org
Cc:     devicetree@...r.kernel.org, linux-actions@...ts.infradead.org,
        linux-kernel@...r.kernel.org, robh+dt@...nel.org,
        linux-arm-kernel@...ts.infradead.org,
        "kernel@...labora.com" <kernel@...labora.com>,
        lkcamp@...ts.libreplanetbr.org
Subject: Re: [PATCH v1] arm64: dts: actions: Fix smp Bringing up secondary
 CPUs

Hi Matheus,

On 7/5/20 4:19 PM, Matheus Castello wrote:
> Change the enable-method to fix the failed to boot errors:
> 
> [    0.040330] smp: Bringing up secondary CPUs ...
> [    0.040683] psci: failed to boot CPU1 (-22)
> [    0.040691] CPU1: failed to boot: -22
> [    0.041062] psci: failed to boot CPU2 (-22)
> [    0.041071] CPU2: failed to boot: -22
> [    0.041408] psci: failed to boot CPU3 (-22)
> [    0.041417] CPU3: failed to boot: -22
> [    0.041443] smp: Brought up 1 node, 1 CPU
> [    0.041451] SMP: Total of 1 processors activated.
> 
> Tested on Caninos Labrador v3 based on Actions Semi S700.
> 
> Signed-off-by: Matheus Castello <matheus@...tello.eng.br>

I tested on the Caninos Labrador v3, and I don't get this errors anymore with this patch,
and I have all 4 CPUs:

[    0.076961] smp: Brought up 1 node, 4 CPUs
[    0.574290] SMP: Total of 4 processors activated.

Full boot log without your patch: http://ix.io/2qYU
Full boot log with your patch: http://ix.io/2qYV

Tested-by: Helen Koike <helen.koike@...labora.com>

Thanks
Helen

> ---
>  arch/arm64/boot/dts/actions/s700.dtsi | 33 +++++++++++++++++++--------
>  1 file changed, 23 insertions(+), 10 deletions(-)
> 
> --
> 2.27.0
> 
> diff --git a/arch/arm64/boot/dts/actions/s700.dtsi b/arch/arm64/boot/dts/actions/s700.dtsi
> index 2006ad5424fa..b28dbbcad27b 100644
> --- a/arch/arm64/boot/dts/actions/s700.dtsi
> +++ b/arch/arm64/boot/dts/actions/s700.dtsi
> @@ -14,37 +14,50 @@ / {
>  	#size-cells = <2>;
> 
>  	cpus {
> -		#address-cells = <2>;
> +		#address-cells = <1>;
>  		#size-cells = <0>;
> -
> +
>  		cpu0: cpu@0 {
>  			device_type = "cpu";
>  			compatible = "arm,cortex-a53";
> -			reg = <0x0 0x0>;
> -			enable-method = "psci";
> +			reg = <0x0>;
> +			enable-method = "spin-table";
> +			cpu-release-addr = <0 0x1f000020>;
> +			next-level-cache = <&L2>;
>  		};
> 
>  		cpu1: cpu@1 {
>  			device_type = "cpu";
>  			compatible = "arm,cortex-a53";
> -			reg = <0x0 0x1>;
> -			enable-method = "psci";
> +			reg = <0x1>;
> +			enable-method = "spin-table";
> +			cpu-release-addr = <0 0x1f000020>;
> +			next-level-cache = <&L2>;
>  		};
> 
>  		cpu2: cpu@2 {
>  			device_type = "cpu";
>  			compatible = "arm,cortex-a53";
> -			reg = <0x0 0x2>;
> -			enable-method = "psci";
> +			reg = <0x2>;
> +			enable-method = "spin-table";
> +			cpu-release-addr = <0 0x1f000020>;
> +			next-level-cache = <&L2>;
>  		};
> 
>  		cpu3: cpu@3 {
>  			device_type = "cpu";
>  			compatible = "arm,cortex-a53";
> -			reg = <0x0 0x3>;
> -			enable-method = "psci";
> +			reg = <0x3>;
> +			enable-method = "spin-table";
> +			cpu-release-addr = <0 0x1f000020>;
> +			next-level-cache = <&L2>;
>  		};
>  	};
> +
> +	L2: l2-cache {
> +		compatible = "cache";
> +		cache-level = <2>;
> +	};
> 
>  	reserved-memory {
>  		#address-cells = <2>;
>