linux-kernel - Re: [PATCH v5 14/15] arm64: dts: qcom: sm8650: add hwkm support to ufs ice

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Message-ID: <109b1e46-f46f-4636-87d5-66266e04ccff@linaro.org>
Date: Mon, 17 Jun 2024 10:28:15 +0200
From: neil.armstrong@...aro.org
To: Gaurav Kashyap <quic_gaurkash@...cinc.com>,
 linux-arm-msm@...r.kernel.org, linux-scsi@...r.kernel.org,
 andersson@...nel.org, ebiggers@...gle.com, srinivas.kandagatla@...aro.org,
 krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org, robh+dt@...nel.org
Cc: linux-kernel@...r.kernel.org, linux-mmc@...r.kernel.org,
 kernel@...cinc.com, linux-crypto@...r.kernel.org,
 devicetree@...r.kernel.org, quic_omprsing@...cinc.com,
 quic_nguyenb@...cinc.com, bartosz.golaszewski@...aro.org,
 konrad.dybcio@...aro.org, ulf.hansson@...aro.org, jejb@...ux.ibm.com,
 martin.petersen@...cle.com, mani@...nel.org, davem@...emloft.net,
 herbert@...dor.apana.org.au, psodagud@...cinc.com, quic_apurupa@...cinc.com,
 sonalg@...cinc.com
Subject: Re: [PATCH v5 14/15] arm64: dts: qcom: sm8650: add hwkm support to
 ufs ice

Hi,

On 17/06/2024 02:51, Gaurav Kashyap wrote:
> The Inline Crypto Engine (ICE) for UFS/EMMC supports the
> Hardware Key Manager (HWKM) to securely manage storage
> keys. Enable using this hardware on sm8650.
> 
> This requires two changes:
> 1. Register size increase: HWKM is an additional piece of hardware
>     sitting alongside ICE, and extends the old ICE's register space.
> 2. Explicitly tell the ICE driver to use HWKM with ICE so that
>     wrapped keys are used in sm8650.
> 
> Reviewed-by: Om Prakash Singh <quic_omprsing@...cinc.com>
> Tested-by: Neil Armstrong <neil.armstrong@...aro.org>
> Signed-off-by: Gaurav Kashyap <quic_gaurkash@...cinc.com>
> ---
>   arch/arm64/boot/dts/qcom/sm8650.dtsi | 4 +++-
>   1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sm8650.dtsi b/arch/arm64/boot/dts/qcom/sm8650.dtsi
> index bb0b3c48ee4b..a34c4b7ccbac 100644
> --- a/arch/arm64/boot/dts/qcom/sm8650.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sm8650.dtsi
> @@ -2593,9 +2593,11 @@ &mc_virt SLAVE_EBI1 QCOM_ICC_TAG_ALWAYS>,
>   		ice: crypto@...8000 {
>   			compatible = "qcom,sm8650-inline-crypto-engine",
>   				     "qcom,inline-crypto-engine";
> -			reg = <0 0x01d88000 0 0x8000>;
> +			reg = <0 0x01d88000 0 0x10000>;
>   
>   			clocks = <&gcc GCC_UFS_PHY_ICE_CORE_CLK>;
> +
> +			qcom,ice-use-hwkm;
>   		};
>   
>   		tcsr_mutex: hwlock@...0000 {

Please split this (and next) in two patches:
- one extending the register size + Fixes tag so it can backported to stable kernels
- one adding qcom,ice-use-hwkm (if bindings maintainers agrees with this property)

And please send sm8550 before sm8650...

Thanks,
Neil