linux-kernel - Re: [PATCH 1/2] firmware: qcom: scm: add modparam to control QSEECOM enablement

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Message-ID: <f6205012-5f5b-4613-bcb5-dea3f904b5a0@oss.qualcomm.com>
Date: Mon, 4 Nov 2024 10:38:51 +0100
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konradybcio@...nel.org>
Cc: linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/2] firmware: qcom: scm: add modparam to control QSEECOM
 enablement

On 3.11.2024 4:37 PM, Dmitry Baryshkov wrote:
> In preparation to enabling QSEECOM for the platforms rather than
> individual machines provide a mechanism for the user to override default
> selection. Allow users to use qcom_scm.qseecom modparam. Setting it to
> 'force' will enable QSEECOM even if it disabled or not handled by the
> allowlist. Setting it to 'off' will forcebly disable the QSEECOM
> interface, allowing incompatible machines to function. All other values
> mean 'auto', trusting the allowlist in the module.
> 
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
> ---

[...]

>  
> -static bool qcom_scm_qseecom_machine_is_allowed(void)
> +static bool qcom_scm_qseecom_machine_is_allowed(struct device *scm_dev)
>  {
>  	struct device_node *np;
>  	bool match;
>  
> +	if (!strcmp(qseecom, "off")) {
> +		dev_info(scm_dev, "qseecom: disabled by modparam\n");
> +		return false;
> +	} else if (!strcmp(qseecom, "force")) {
> +		dev_info(scm_dev, "qseecom: forcebly enabled\n");

forcibly

may also be useful to say "by modparam" here as well

Konrad