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Date:   Thu, 19 May 2022 11:37:23 +0100
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>,
        Dave Jiang <dave.jiang@intel.com>,
        Vinod Koul <vkoul@kernel.org>,
        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 v7 01/10] iommu: Add pasids field in struct iommu_device
Message-ID: <YoYd43JFXJcqngby@myrica>
References: <20220519072047.2996983-1-baolu.lu@linux.intel.com>
 <20220519072047.2996983-2-baolu.lu@linux.intel.com>
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In-Reply-To: <20220519072047.2996983-2-baolu.lu@linux.intel.com>
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Hi Baolu,

On Thu, May 19, 2022 at 03:20:38PM +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 88817a3376ef..6e2cd082c670 100644
> --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
> +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
> @@ -3546,6 +3546,7 @@ static int arm_smmu_device_hw_probe(struct arm_smmu_device *smmu)
>  	/* SID/SSID sizes */
>  	smmu->ssid_bits = FIELD_GET(IDR1_SSIDSIZE, reg);
>  	smmu->sid_bits = FIELD_GET(IDR1_SIDSIZE, reg);
> +	smmu->iommu.pasids = smmu->ssid_bits;

This should be 1UL << smmu->ssid_bits

Thanks,
Jean