linux-kernel - Re: [PATCH v3 3/4] iommu/arm-smmu: add ACTLR data and support for SC7280

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Date:   Mon, 27 Nov 2023 16:35:12 +0100
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Bibek Kumar Patro <quic_bibekkum@...cinc.com>, will@...nel.org,
        robin.murphy@....com, joro@...tes.org, dmitry.baryshkov@...aro.org,
        a39.skl@...il.com, quic_bjorande@...cinc.com, mani@...nel.org,
        quic_eberman@...cinc.com, robdclark@...omium.org,
        u.kleine-koenig@...gutronix.de, robh@...nel.org,
        vladimir.oltean@....com, quic_pkondeti@...cinc.com,
        quic_molvera@...cinc.com
Cc:     linux-arm-msm@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, iommu@...ts.linux.dev,
        linux-kernel@...r.kernel.org, qipl.kernel.upstream@...cinc.com
Subject: Re: [PATCH v3 3/4] iommu/arm-smmu: add ACTLR data and support for
 SC7280

On 27.11.2023 15:54, Bibek Kumar Patro wrote:
> Add ACTLR data table for SC7280 along with support for
> same including SC7280 specific implementation operations.
> 
> Signed-off-by: Bibek Kumar Patro <quic_bibekkum@...cinc.com>
> ---
>  drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c | 25 +++++++++++++++++++++-
>  1 file changed, 24 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
> index 247eaa194129..f0ad09f9a974 100644
> --- a/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
> +++ b/drivers/iommu/arm/arm-smmu/arm-smmu-qcom.c
> @@ -27,6 +27,20 @@ struct actlr_config {
>  #define CPRE			BIT(1)		/* Enable context caching in the prefetch buffer */
>  #define CMTLB			BIT(0)		/* Enable context caching in the macro TLB */
> 
> +static const struct actlr_config sc7280_apps_actlr_cfg[] = {
> +	{ 0x0800, 0x24E1, PREFETCH_DISABLE | CMTLB },
hex should be lowercase

> +	{ 0x2000, 0x0163, PREFETCH_DISABLE | CMTLB },
> +	{ 0x2080, 0x0461, PREFETCH_DISABLE | CMTLB },
> +	{ 0x2100, 0x0161, PREFETCH_DISABLE | CMTLB },
> +	{ 0x0900, 0x0407, PREFETCH_SHALLOW | CPRE | CMTLB },
> +	{ 0x2180, 0x0027, PREFETCH_SHALLOW | CPRE | CMTLB },
> +	{ 0x1000, 0x07ff, PREFETCH_DEEP | CPRE | CMTLB },
> +};
Any reason this list is so much smaller than 8550's? Is it complete?

Konrad