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 18:35:43 +0530
From:   Ganapatrao Kulkarni <gpkulkarni@...il.com>
To:     Hanjun Guo <guohanjun@...wei.com>
Cc:     Ganapatrao Kulkarni <ganapatrao.kulkarni@...ium.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>, linux-acpi@...r.kernel.org,
        iommu@...ts.linux-foundation.org,
        Will Deacon <Will.Deacon@....com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Hanjun Guo <hanjun.guo@...aro.org>, sudeep.holla@....com,
        Robin Murphy <robin.murphy@....com>,
        Lv Zheng <lv.zheng@...el.com>, joro@...tes.org,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        Len Brown <lenb@...nel.org>,
        Jayachandran C <jnair@...iumnetworks.com>
Subject: Re: [PATCH v3 2/2] acpi/iort: numa: Add numa node mapping for smmuv3 devices

On Sat, Jul 22, 2017 at 8:53 AM, Hanjun Guo <guohanjun@...wei.com> wrote:
> 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, i thought it is already there in header file, however,
there is stub for acpi_map_pxm_to_online_node and not for this
function.
it is better to have ifdef. will do it in next version.

>
> Thanks
> Hanjun
>

thanks
Ganapat