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 for Android: free password hash cracker in your pocket

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

Message-ID: <94f6754f-cc56-09c5-3730-3f36c22e4786@oss.qualcomm.com>
Date: Fri, 26 Sep 2025 00:57:00 +0530
From: Vikash Garodia <vikash.garodia@....qualcomm.com>
To: Konrad Dybcio <konrad.dybcio@....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 9/25/2025 2:31 PM, Konrad Dybcio wrote:
> 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?

Not needed for unwinding part.

Regards,
Vikash