linux-kernel - Re: [PATCH v13 2/8] iommu/vt-d: Use a helper function to skip agaw for SL

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Message-ID: <20200514082033.54d2f621@jacob-builder>
Date:   Thu, 14 May 2020 08:20:33 -0700
From:   Jacob Pan <jacob.jun.pan@...ux.intel.com>
To:     Christoph Hellwig <hch@...radead.org>
Cc:     Lu Baolu <baolu.lu@...ux.intel.com>,
        iommu@...ts.linux-foundation.org,
        LKML <linux-kernel@...r.kernel.org>,
        Joerg Roedel <joro@...tes.org>,
        David Woodhouse <dwmw2@...radead.org>,
        Jean-Philippe Brucker <jean-philippe@...aro.com>,
        Eric Auger <eric.auger@...hat.com>,
        Yi Liu <yi.l.liu@...el.com>,
        "Tian, Kevin" <kevin.tian@...el.com>,
        Raj Ashok <ashok.raj@...el.com>,
        Alex Williamson <alex.williamson@...hat.com>,
        Jonathan Cameron <jic23@...nel.org>,
        jacob.jun.pan@...ux.intel.com
Subject: Re: [PATCH v13 2/8] iommu/vt-d: Use a helper function to skip agaw
 for SL

On Wed, 13 May 2020 22:51:32 -0700
Christoph Hellwig <hch@...radead.org> wrote:

> On Wed, May 13, 2020 at 04:01:43PM -0700, Jacob Pan wrote:
> > An Intel iommu domain uses 5-level page table by default. If the
> > iommu that the domain tries to attach supports less page levels,
> > the top level page tables should be skipped. Add a helper to do
> > this so that it could be used in other places.  
> 
> Please use up all 73 chars for the commit log.

Will do. thanks.