Re: [PATCH v6 3/7] iommu/sva: Remove PASID to mm lookup function

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To: Jacob Pan <jacob.jun.pan@xxxxxxxxxxxxxxx>, LKML <linux-kernel@xxxxxxxxxxxxxxx>, iommu@xxxxxxxxxxxxxxx, Jason Gunthorpe <jgg@xxxxxxxxxx>, Joerg Roedel <joro@xxxxxxxxxx>, Jean-Philippe Brucker <jean-philippe@xxxxxxxxxx>, Robin Murphy <robin.murphy@xxxxxxx>, Dave Hansen <dave.hansen@xxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, X86 Kernel <x86@xxxxxxxxxx>, bp@xxxxxxxxx, "H. Peter Anvin" <hpa@xxxxxxxxx>, Peter Zijlstra <peterz@xxxxxxxxxxxxx>, corbet@xxxxxxx, vkoul@xxxxxxxxxx, dmaengine@xxxxxxxxxxxxxxx, linux-doc@xxxxxxxxxxxxxxx
Subject: Re: [PATCH v6 3/7] iommu/sva: Remove PASID to mm lookup function
From: Baolu Lu <baolu.lu@xxxxxxxxxxxxxxx>
Date: Tue, 14 Mar 2023 10:08:00 +0800
Cc: baolu.lu@xxxxxxxxxxxxxxx, Will Deacon <will@xxxxxxxxxx>, David Woodhouse <dwmw2@xxxxxxxxxxxxx>, Raj Ashok <ashok.raj@xxxxxxxxx>, "Tian, Kevin" <kevin.tian@xxxxxxxxx>, Yi Liu <yi.l.liu@xxxxxxxxx>, "Yu, Fenghua" <fenghua.yu@xxxxxxxxx>, Dave Jiang <dave.jiang@xxxxxxxxx>, Kirill Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>, Tony Luck <tony.luck@xxxxxxxxx>
In-reply-to: <20230313204158.1495067-4-jacob.jun.pan@linux.intel.com>
References: <20230313204158.1495067-1-jacob.jun.pan@linux.intel.com> <20230313204158.1495067-4-jacob.jun.pan@linux.intel.com>
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.7.1

On 3/14/23 4:41 AM, Jacob Pan wrote:

There is no user of iommu_sva_find() function, remove it so that PASID
allocator can be a simple IDA. Device drivers are expected to store
and keep track of their own PASID metadata.

Signed-off-by: Jason Gunthorpe<jgg@xxxxxxxxxx>
Signed-off-by: Jacob Pan<jacob.jun.pan@xxxxxxxxxxxxxxx>


Reviewed-by: Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>

Best regards,
baolu

References:
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  - From: Jacob Pan
- [PATCH v6 3/7] iommu/sva: Remove PASID to mm lookup function
  - From: Jacob Pan

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