linux-kernel - Re: [PATCH v2 3/8] iommu/sva: Support reservation of global SVA PASIDs

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Date:   Tue, 28 Mar 2023 09:32:16 -0700
From:   Jacob Pan <jacob.jun.pan@...ux.intel.com>
To:     Jason Gunthorpe <jgg@...dia.com>
Cc:     "Tian, Kevin" <kevin.tian@...el.com>,
        LKML <linux-kernel@...r.kernel.org>,
        "iommu@...ts.linux.dev" <iommu@...ts.linux.dev>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        Joerg Roedel <joro@...tes.org>,
        "dmaengine@...r.kernel.org" <dmaengine@...r.kernel.org>,
        "vkoul@...nel.org" <vkoul@...nel.org>,
        Robin Murphy <robin.murphy@....com>,
        Will Deacon <will@...nel.org>,
        David Woodhouse <dwmw2@...radead.org>,
        "Raj, Ashok" <ashok.raj@...el.com>,
        "Liu, Yi L" <yi.l.liu@...el.com>,
        "Yu, Fenghua" <fenghua.yu@...el.com>,
        "Jiang, Dave" <dave.jiang@...el.com>,
        "Luck, Tony" <tony.luck@...el.com>,
        "Zanussi, Tom" <tom.zanussi@...el.com>,
        jacob.jun.pan@...ux.intel.com
Subject: Re: [PATCH v2 3/8] iommu/sva: Support reservation of global SVA
 PASIDs

Hi Jason,

On Tue, 28 Mar 2023 12:55:40 -0300, Jason Gunthorpe <jgg@...dia.com> wrote:

> On Tue, Mar 28, 2023 at 08:31:10AM -0700, Jacob Pan wrote:
> 
> > > this would be future proof when the same driver starts to allocate
> > > more pasids for other usages e..g siov.  
> > I don't have strong preference here. Jason and others?  
> 
> Oh I'm all for getting the word SVA out of the PASID infrastructure.
> 
> SVA has nothing to do with PASID other than it requires it to work.
> 
I will move pasid allocation code to iommu.c then.

Thanks,

Jacob