linux-kernel - Re: [PATCH v2 13/14] PCI/P2PDMA: No longer require no-mmu for host bridge whitelist

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Date:   Wed, 7 Aug 2019 07:43:01 -0500
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Christoph Hellwig <hch@....de>
Cc:     Logan Gunthorpe <logang@...tatee.com>,
        Sagi Grimberg <sagi@...mberg.me>, linux-rdma@...r.kernel.org,
        linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-nvme@...ts.infradead.org,
        Christian Koenig <Christian.Koenig@....com>,
        Jens Axboe <axboe@...com>, Keith Busch <kbusch@...nel.org>,
        Jason Gunthorpe <jgg@...lanox.com>,
        Stephen Bates <sbates@...thlin.com>,
        Dan Williams <dan.j.williams@...el.com>,
        Eric Pilmore <epilmore@...aio.com>
Subject: Re: [PATCH v2 13/14] PCI/P2PDMA: No longer require no-mmu for host
 bridge whitelist

On Wed, Aug 07, 2019 at 07:59:58AM +0200, Christoph Hellwig wrote:
> no-mmu sounds stange, as we use that for linux ports without paging
> hardware.  I think an "io" got lost somewhere..

I had already changed the subject to

  PCI/P2PDMA: Allow IOMMU for host bridge whitelist

but certainly open to better suggestions.