linux-kernel - Re: [PATCH v4 0/9] iommu: Bounce page for untrusted devices

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Date:   Wed, 12 Jun 2019 09:22:25 +0300
From:   Mika Westerberg <mika.westerberg@...ux.intel.com>
To:     Lu Baolu <baolu.lu@...ux.intel.com>
Cc:     Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        David Woodhouse <dwmw2@...radead.org>,
        Joerg Roedel <joro@...tes.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Christoph Hellwig <hch@....de>, ashok.raj@...el.com,
        jacob.jun.pan@...el.com, alan.cox@...el.com, kevin.tian@...el.com,
        Ingo Molnar <mingo@...hat.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        pengfei.xu@...el.com, Marek Szyprowski <m.szyprowski@...sung.com>,
        Robin Murphy <robin.murphy@....com>,
        Jonathan Corbet <corbet@....net>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>,
        Juergen Gross <jgross@...e.com>,
        Stefano Stabellini <sstabellini@...nel.org>,
        Steven Rostedt <rostedt@...dmis.org>,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 0/9] iommu: Bounce page for untrusted devices

On Wed, Jun 12, 2019 at 11:00:06AM +0800, Lu Baolu wrote:
> > What kind of devices did you test it with?
> 
> Most test work was done by Xu Pengfei (cc'ed). He has run the code
> on real platforms with various thunderbolt peripherals (usb, disk,
> network, etc.).

In addtition to that we are also in works to build a real thunderclap
platform to verify it can only access the bounce buffer if the DMA
transfer was to a memory not filling the whole page.