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[209.132.183.28]) by mx.google.com with ESMTPS id n7si375801qkc.20.2019.01.29.12.00.36 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 29 Jan 2019 12:00:36 -0800 (PST) Received-SPF: pass (google.com: domain of jglisse@redhat.com designates 209.132.183.28 as permitted sender) client-ip=209.132.183.28; Authentication-Results: mx.google.com; spf=pass (google.com: domain of jglisse@redhat.com designates 209.132.183.28 as permitted sender) smtp.mailfrom=jglisse@redhat.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 9EFEB811D8; Tue, 29 Jan 2019 20:00:35 +0000 (UTC) Received: from redhat.com (ovpn-122-2.rdu2.redhat.com [10.10.122.2]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 618B45C239; Tue, 29 Jan 2019 20:00:33 +0000 (UTC) Date: Tue, 29 Jan 2019 15:00:31 -0500 From: Jerome Glisse To: Alex Deucher Cc: linux-mm , Joerg Roedel , "Rafael J . Wysocki" , Greg Kroah-Hartman , Felix Kuehling , LKML , Maling list - DRI developers , Christoph Hellwig , iommu@lists.linux-foundation.org, Jason Gunthorpe , Linux PCI , Bjorn Helgaas , Robin Murphy , Logan Gunthorpe , Christian Koenig , Marek Szyprowski Subject: Re: [RFC PATCH 1/5] pci/p2p: add a function to test peer to peer capability Message-ID: <20190129200031.GL3176@redhat.com> References: <20190129174728.6430-1-jglisse@redhat.com> <20190129174728.6430-2-jglisse@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.27]); Tue, 29 Jan 2019 20:00:36 +0000 (UTC) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Tue, Jan 29, 2019 at 02:56:38PM -0500, Alex Deucher wrote: > On Tue, Jan 29, 2019 at 12:47 PM wrote: > > > > From: Jérôme Glisse > > > > device_test_p2p() return true if two devices can peer to peer to > > each other. We add a generic function as different inter-connect > > can support peer to peer and we want to genericaly test this no > > matter what the inter-connect might be. However this version only > > support PCIE for now. > > > > What about something like these patches: > https://cgit.freedesktop.org/~deathsimple/linux/commit/?h=p2p&id=4fab9ff69cb968183f717551441b475fabce6c1c > https://cgit.freedesktop.org/~deathsimple/linux/commit/?h=p2p&id=f90b12d41c277335d08c9dab62433f27c0fadbe5 > They are a bit more thorough. Yes it would be better, i forgot about those. I can include them next time i post. Thank you for reminding me about those :) Cheers, Jérôme