linux-kernel - Re: [PATCH v5 13/23] iommu: introduce device fault report API

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Message-ID: <20180521160328.02bc9414@jacob-builder>
Date:   Mon, 21 May 2018 16:03:28 -0700
From:   Jacob Pan <jacob.jun.pan@...ux.intel.com>
To:     "Liu, Yi L" <yi.l.liu@...el.com>
Cc:     "iommu@...ts.linux-foundation.org" <iommu@...ts.linux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Joerg Roedel <joro@...tes.org>,
        "David Woodhouse" <dwmw2@...radead.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Alex Williamson <alex.williamson@...hat.com>,
        Jean-Philippe Brucker <jean-philippe.brucker@....com>,
        "Wysocki, Rafael J" <rafael.j.wysocki@...el.com>,
        "Tian, Kevin" <kevin.tian@...el.com>,
        "Raj, Ashok" <ashok.raj@...el.com>,
        Jean Delvare <khali@...ux-fr.org>,
        "Christoph Hellwig" <hch@...radead.org>,
        Lu Baolu <baolu.lu@...ux.intel.com>,
        jacob.jun.pan@...ux.intel.com
Subject: Re: [PATCH v5 13/23] iommu: introduce device fault report API

On Thu, 17 May 2018 23:22:43 +0000
"Liu, Yi L" <yi.l.liu@...el.com> wrote:

> > So as long as in-kernel PRQ handling can do queuing, there is no
> > need for queuing in the host reporting path.  
> 
> Will it affect current interface? Here the handler only get an "evt"
> per a PRQ IRQ. And I suppose vfio needs not rely on host iommu
> queuing?

I don't think it needs iommu driver queuing.