linux-kernel - RE: [PATCH 2/5] iommu: Call helper function to get assigned pasid value

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Message-ID: <BN9PR11MB52767F29A6C11157659D375B8C12A@BN9PR11MB5276.namprd11.prod.outlook.com>
Date:   Wed, 9 Aug 2023 09:49:16 +0000
From:   "Tian, Kevin" <kevin.tian@...el.com>
To:     Baolu Lu <baolu.lu@...ux.intel.com>,
        "Zhang, Tina" <tina.zhang@...el.com>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Michael Shavit <mshavit@...gle.com>
CC:     "iommu@...ts.linux.dev" <iommu@...ts.linux.dev>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 2/5] iommu: Call helper function to get assigned pasid
 value

> From: Baolu Lu <baolu.lu@...ux.intel.com>
> Sent: Wednesday, August 9, 2023 8:22 AM
> 
> On 2023/8/8 15:49, Tina Zhang wrote:
> > Use the helper function mm_get_pasid() to get the mm assigned pasid
> > value.
> 
> For internal iommu drivers, perhaps we should use another helper.
> Something like sva_domain_get_pasid()?
> 
> Suppose that the iommu drivers should have no idea about the "mm".
> 

Aren't all touched functions accept a struct mm_struct pointer?