linux-kernel - Re: use generic dma-direct and swiotlb code for x86 V3

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Date:   Tue, 20 Mar 2018 16:16:00 +0100
From:   Christoph Hellwig <hch@....de>
To:     Konrad Rzeszutek Wilk <konrad@...nok.org>
Cc:     Ingo Molnar <mingo@...nel.org>, Christoph Hellwig <hch@....de>,
        Tom Lendacky <thomas.lendacky@....com>,
        Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>,
        x86@...nel.org, linux-kernel@...r.kernel.org,
        Muli Ben-Yehuda <mulix@...ix.org>,
        iommu@...ts.linux-foundation.org,
        David Woodhouse <dwmw2@...radead.org>
Subject: Re: use generic dma-direct and swiotlb code for x86 V3

On Tue, Mar 20, 2018 at 11:25:21AM +0000, Konrad Rzeszutek Wilk wrote:
> Are you testing with swiotlb=force?

I've done swiotlb=force testing with earlier versions, and otherwise
relied on a VM with more the 4gb of memory and emulated devices
without 64-bit capability.