linux-kernel - Re: [PATCH v2 00/10] iommu/vt-d: Bounce buffer for untrusted devices

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Message-ID: <20190327064823.GA13309@infradead.org>
Date:   Tue, 26 Mar 2019 23:48:23 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Lu Baolu <baolu.lu@...ux.intel.com>
Cc:     David Woodhouse <dwmw2@...radead.org>,
        Joerg Roedel <joro@...tes.org>, ashok.raj@...el.com,
        jacob.jun.pan@...el.com, alan.cox@...el.com, kevin.tian@...el.com,
        mika.westerberg@...ux.intel.com, pengfei.xu@...el.com,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 00/10] iommu/vt-d: Bounce buffer for untrusted devices

On Wed, Mar 27, 2019 at 02:34:56PM +0800, Lu Baolu wrote:
>   - During the v1 review cycle, we discussed the possibility
>     of reusing swiotlb code to avoid code dumplication, but
>     we found the swiotlb implementations are not ready for the
>     use of bounce page pool.
>     https://lkml.org/lkml/2019/3/19/259

So make it ready.  You too can contribute to common code.  Robin
also explicitly asked to make the bounce policy iommu-subsystem wide.