linux-kernel - Re: [PATCH 3/8] media: iris: Add support for multiple TZ CP configs

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <050b2cc8-ddbd-4a79-879e-4a2c9e7d95f0@oss.qualcomm.com>
Date: Thu, 25 Sep 2025 11:01:15 +0200
From: Konrad Dybcio <konrad.dybcio@....qualcomm.com>
To: Vikash Garodia <vikash.garodia@....qualcomm.com>,
        Dikshita Agarwal <dikshita.agarwal@....qualcomm.com>,
        Abhinav Kumar <abhinav.kumar@...ux.dev>,
        Bryan O'Donoghue <bod@...nel.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
 <conor+dt@...nel.org>,
        Philipp Zabel <p.zabel@...gutronix.de>
Cc: linux-arm-msm@...r.kernel.org, linux-media@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Vishnu Reddy <quic_bvisredd@...cinc.com>
Subject: Re: [PATCH 3/8] media: iris: Add support for multiple TZ CP configs

On 9/25/25 1:14 AM, Vikash Garodia wrote:
> vpu4 needs an additional configuration w.r.t CP regions. Make the CP
> configuration as array such that the multiple configuration can be
> managed per platform.
> 
> Co-developed-by: Vishnu Reddy <quic_bvisredd@...cinc.com>
> Signed-off-by: Vishnu Reddy <quic_bvisredd@...cinc.com>
> Signed-off-by: Vikash Garodia <vikash.garodia@....qualcomm.com>
> ---

[...]

> -	ret = qcom_scm_mem_protect_video_var(cp_config->cp_start,
> -					     cp_config->cp_size,
> -					     cp_config->cp_nonpixel_start,
> -					     cp_config->cp_nonpixel_size);
> -	if (ret) {
> -		dev_err(core->dev, "protect memory failed\n");
> -		qcom_scm_pas_shutdown(core->iris_platform_data->pas_id);
> -		return ret;
> +	for (i = 0; i < core->iris_platform_data->tz_cp_config_data_size; i++) {
> +		cp_config = &core->iris_platform_data->tz_cp_config_data[i];
> +		ret = qcom_scm_mem_protect_video_var(cp_config->cp_start,
> +						     cp_config->cp_size,
> +						     cp_config->cp_nonpixel_start,
> +						     cp_config->cp_nonpixel_size);
> +		if (ret) {
> +			dev_err(core->dev, "protect memory failed\n");
> +			qcom_scm_pas_shutdown(core->iris_platform_data->pas_id);
> +			return ret;
> +		}
>  	}

Do we need to do any "un-protecting" when unrolling from an error?

Konrad