linux-kernel - Re: [PATCH v3 2/2] acpi/iort: numa: Add numa node mapping for smmuv3 devices

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Date:   Sat, 22 Jul 2017 11:23:59 +0800
From:   Hanjun Guo <guohanjun@...wei.com>
To:     Ganapatrao Kulkarni <ganapatrao.kulkarni@...ium.com>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-acpi@...r.kernel.org>, <iommu@...ts.linux-foundation.org>
CC:     <Will.Deacon@....com>, <lorenzo.pieralisi@....com>,
        <hanjun.guo@...aro.org>, <sudeep.holla@....com>,
        <robin.murphy@....com>, <lv.zheng@...el.com>, <joro@...tes.org>,
        <rjw@...ysocki.net>, <lenb@...nel.org>, <jnair@...iumnetworks.com>,
        <gpkulkarni@...il.com>
Subject: Re: [PATCH v3 2/2] acpi/iort: numa: Add numa node mapping for smmuv3
 devices

Hi Ganapat,

On 2017/6/8 12:44, Ganapatrao Kulkarni wrote:
> Add code to parse proximity domain in SMMUv3 IORT table to
> set numa node mapping for smmuv3 devices.
>
> Signed-off-by: Ganapatrao Kulkarni <ganapatrao.kulkarni@...ium.com>
> ---
>  drivers/acpi/arm64/iort.c | 28 ++++++++++++++++++++++++++--
>  1 file changed, 26 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/acpi/arm64/iort.c b/drivers/acpi/arm64/iort.c
> index bba2b59..e804386 100644
> --- a/drivers/acpi/arm64/iort.c
> +++ b/drivers/acpi/arm64/iort.c
> @@ -882,6 +882,23 @@ static bool __init arm_smmu_v3_is_coherent(struct acpi_iort_node *node)
>  	return smmu->flags & ACPI_IORT_SMMU_V3_COHACC_OVERRIDE;
>  }
>  
> +/*
> + * set numa proximity domain for smmuv3 device
> + */
> +static void  __init arm_smmu_v3_set_proximity(struct acpi_iort_node *node,
> +		struct device *dev)
> +{
> +	struct acpi_iort_smmu_v3 *smmu;
> +
> +	smmu = (struct acpi_iort_smmu_v3 *)node->node_data;
> +	if (smmu->flags & ACPI_IORT_SMMU_V3_PXM_VALID) {
> +		set_dev_node(dev, acpi_map_pxm_to_node(smmu->pxm));
                                                          ^^
Will have compile error in !CONFIG_NUMA, I think we need to introduce
a stub function in acpi_numa.h.

Thanks
Hanjun