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Date:   Mon, 21 Mar 2022 11:22:09 +0000
From:   Jean-Philippe Brucker <jean-philippe@linaro.org>
To:     Lu Baolu <baolu.lu@linux.intel.com>
Cc:     Joerg Roedel <joro@8bytes.org>, Jason Gunthorpe <jgg@nvidia.com>,
        Christoph Hellwig <hch@infradead.org>,
        Kevin Tian <kevin.tian@intel.com>,
        Ashok Raj <ashok.raj@intel.com>, Will Deacon <will@kernel.org>,
        Robin Murphy <robin.murphy@arm.com>,
        Jean-Philippe Brucker <jean-philippe@linaro.com>,
        Eric Auger <eric.auger@redhat.com>,
        Liu Yi L <yi.l.liu@intel.com>,
        Jacob jun Pan <jacob.jun.pan@intel.com>,
        iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH RFC 01/11] iommu: Add pasid_bits field in struct dev_iommu
Message-ID: <Yjhf4dlthDkHBICr@myrica>
References: <20220320064030.2936936-1-baolu.lu@linux.intel.com>
 <20220320064030.2936936-2-baolu.lu@linux.intel.com>
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In-Reply-To: <20220320064030.2936936-2-baolu.lu@linux.intel.com>
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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()

Thanks,
Jean

>  		return arm_smmu_master_enable_sva(master);
>  	default:
>  		return -EINVAL;