linux-kernel - Re: [PATCH 0/8] Virtio-over-PCIe on non-MIC

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Message-ID: <20190117151920.GA20359@infradead.org>
Date:   Thu, 17 Jan 2019 07:19:20 -0800
From:   Christoph Hellwig <hch@...radead.org>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Vincent Whitchurch <vincent.whitchurch@...s.com>,
        sudeep.dutt@...el.com, ashutosh.dixit@...el.com,
        gregkh <gregkh@...uxfoundation.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Kishon Vijay Abraham I <kishon@...com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        linux-pci <linux-pci@...r.kernel.org>,
        linux-ntb@...glegroups.com, Jon Mason <jdmason@...zu.us>,
        Dave Jiang <dave.jiang@...el.com>,
        Allen Hubbe <allenbh@...il.com>
Subject: Re: [PATCH 0/8] Virtio-over-PCIe on non-MIC

On Thu, Jan 17, 2019 at 07:15:29AM -0800, Christoph Hellwig wrote:
> On Thu, Jan 17, 2019 at 01:39:27PM +0100, Arnd Bergmann wrote:
> > Can you describe how you expect a VOP device over NTB or
> > PCIe-endpoint would get created, configured and used?
> > Is there always one master side that is responsible for creating
> > virtio devices on it, with the slave side automatically attaching to
> > them, or can either side create virtio devices? Is there any limit on
> > the number of virtio devices or queues within a VOP device?
> 
> For VOP device over NTB your configure your device using configfs
> on one side, and for the other side it will just show up like any
> other PCIe device, because it is.

Sorry, I mean over the PCI-EP infratructure of course.  NTB actually
is rather hairy and complicated.