linux-kernel - Re: [PATCH V3] iommu/arm-smmu: add actlr settings for mdss on Qualcomm platforms

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] [day] [month] [year] [list]

Message-ID: <81cdefa8-9bc9-4fb3-ac7f-afb34f70e8de@oss.qualcomm.com>
Date: Wed, 26 Nov 2025 17:06:54 +0530
From: Charan Teja Kalla <charan.kalla@....qualcomm.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
Cc: konrad.dybcio@....qualcomm.com, robin.clark@....qualcomm.com,
        will@...nel.org, robin.murphy@....com, joro@...tes.org,
        iommu@...ts.linux.dev, linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V3] iommu/arm-smmu: add actlr settings for mdss on
 Qualcomm platforms



On 11/26/2025 7:21 AM, Dmitry Baryshkov wrote:
>> diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
>> index c21a401c71eb..ead1a59d40ae 100644
>> --- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
>> +++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
>> @@ -41,12 +41,34 @@ static const struct of_device_id qcom_smmu_actlr_client_of_match[] = {
>>  			.data = (const void *) (PREFETCH_DEEP | CPRE | CMTLB) },
>>  	{ .compatible = "qcom,fastrpc",
>>  			.data = (const void *) (PREFETCH_DEEP | CPRE | CMTLB) },
>> +	{ .compatible = "qcom,qcm2290-mdss",
>> +			.data = (const void *) (PREFETCH_SHALLOW | CPRE | CMTLB) },
>>  	{ .compatible = "qcom,sc7280-mdss",
>>  			.data = (const void *) (PREFETCH_SHALLOW | CPRE | CMTLB) },
>>  	{ .compatible = "qcom,sc7280-venus",
>>  			.data = (const void *) (PREFETCH_SHALLOW | CPRE | CMTLB) },
>> +	{ .compatible = "qcom,sc8180x-mdss",
>> +			.data = (const void *) (PREFETCH_SHALLOW | CPRE | CMTLB) },
> sc8280xp? sm6115?  sdm845? sdm660, msm8998?
8280 and 6115 is slipped....will update in next revision.

This Prefetch feature is not implemented for all the platforms, I
captured only to those that are implemented(to the best of my knowledge)
-- I will put this in commit message.

Thanks,
Charan