linux-kernel - RE: [PATCH v2 08/12] iommu: Prepare for separating SVA and IOPF

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Date:   Wed, 9 Aug 2023 00:02:50 +0000
From:   "Tian, Kevin" <kevin.tian@...el.com>
To:     Jason Gunthorpe <jgg@...pe.ca>
CC:     Lu Baolu <baolu.lu@...ux.intel.com>,
        Joerg Roedel <joro@...tes.org>,
        "Will Deacon" <will@...nel.org>,
        Robin Murphy <robin.murphy@....com>,
        "Jean-Philippe Brucker" <jean-philippe@...aro.org>,
        Nicolin Chen <nicolinc@...dia.com>,
        "Liu, Yi L" <yi.l.liu@...el.com>,
        Jacob Pan <jacob.jun.pan@...ux.intel.com>,
        "iommu@...ts.linux.dev" <iommu@...ts.linux.dev>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v2 08/12] iommu: Prepare for separating SVA and IOPF

> From: Jason Gunthorpe <jgg@...pe.ca>
> Sent: Wednesday, August 9, 2023 2:43 AM
> 
> On Thu, Aug 03, 2023 at 08:16:47AM +0000, Tian, Kevin wrote:
> 
> > Is there plan to introduce further error in the future? otherwise this should
> > be void.
> >
> > btw the work queue is only for sva. If there is no other caller this can be
> > just kept in iommu-sva.c. No need to create a helper.
> 
> I think more than just SVA will need a work queue context to process
> their faults.
> 

then this series needs more work. Currently the abstraction doesn't
include workqueue in the common fault reporting layer.