linux-kernel - Re: [PATCH 3/6] iommu/vt-d: Don't force 32bit devices to uses DMA domain

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Message-ID: <20200310105813.GE3794@8bytes.org>
Date:   Tue, 10 Mar 2020 11:58:14 +0100
From:   Joerg Roedel <joro@...tes.org>
To:     Christoph Hellwig <hch@....de>
Cc:     Lu Baolu <baolu.lu@...ux.intel.com>, ashok.raj@...el.com,
        jacob.jun.pan@...ux.intel.com, kevin.tian@...el.com,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
        Daniel Drake <drake@...lessm.com>,
        Derrick Jonathan <jonathan.derrick@...el.com>,
        Jerry Snitselaar <jsnitsel@...hat.com>,
        Robin Murphy <robin.murphy@....com>
Subject: Re: [PATCH 3/6] iommu/vt-d: Don't force 32bit devices to uses DMA
 domain

On Sat, Mar 07, 2020 at 03:21:44PM +0100, Christoph Hellwig wrote:
> Can we add a new AUTO domain which will allow using the identity
> mapping when available?  That somewhat matches the existing x86
> default, and also what powerpc does.  I have a series to lift
> that bypass mode into the core dma-mapping code that I need
> to repost, which I think would be suitable for intel-iommu as well.

Please Cc me on that series when you re-post it.


Thanks,

	Joerg