linux-kernel - Re: [PATCH RFC 01/11] iommu: Add pasid_bits field in struct dev

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Message-ID: <a0be971d-2cbc-8d62-4a05-9f8542fefe94@linux.intel.com>
Date:   Tue, 22 Mar 2022 08:45:05 +0800
From:   Lu Baolu <baolu.lu@...ux.intel.com>
To:     Jean-Philippe Brucker <jean-philippe@...aro.org>
Cc:     baolu.lu@...ux.intel.com, Joerg Roedel <joro@...tes.org>,
        Jason Gunthorpe <jgg@...dia.com>,
        Christoph Hellwig <hch@...radead.org>,
        Kevin Tian <kevin.tian@...el.com>,
        Ashok Raj <ashok.raj@...el.com>, Will Deacon <will@...nel.org>,
        Robin Murphy <robin.murphy@....com>,
        Jean-Philippe Brucker <jean-philippe@...aro.com>,
        Eric Auger <eric.auger@...hat.com>,
        Liu Yi L <yi.l.liu@...el.com>,
        Jacob jun Pan <jacob.jun.pan@...el.com>,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH RFC 01/11] iommu: Add pasid_bits field in struct dev_iommu

On 2022/3/21 19:22, Jean-Philippe Brucker wrote:
> Hi Baolu,
> 
> On Sun, Mar 20, 2022 at 02:40:20PM +0800, Lu Baolu wrote:
>> diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
>> index 627a3ed5ee8f..8e262210b5ad 100644
>> --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
>> +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
>> @@ -2812,6 +2812,7 @@ static int arm_smmu_dev_enable_feature(struct device *dev,
>>   		master->iopf_enabled = true;
>>   		return 0;
>>   	case IOMMU_DEV_FEAT_SVA:
>> +		dev->iommu->pasid_bits = master->ssid_bits;
> This would be better in arm_smmu_probe_device()

Sure.

Best regards,
baolu