linux-kernel - Re: [PATCH] um: virt-pci: set device ready in probe()

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Message-ID: <20220613065004.GA21804@axis.com>
Date:   Mon, 13 Jun 2022 08:50:05 +0200
From:   Vincent Whitchurch <vincent.whitchurch@...s.com>
To:     "Michael S. Tsirkin" <mst@...hat.com>
CC:     Richard Weinberger <richard@....at>,
        Anton Ivanov <anton.ivanov@...bridgegreys.com>,
        Johannes Berg <johannes@...solutions.net>,
        kernel <kernel@...s.com>, Xuan Zhuo <xuanzhuo@...ux.alibaba.com>,
        Jason Wang <jasowang@...hat.com>,
        "linux-um@...ts.infradead.org" <linux-um@...ts.infradead.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] um: virt-pci: set device ready in probe()

On Sat, Jun 11, 2022 at 02:34:04AM +0200, Michael S. Tsirkin wrote:
> BTW Johannes I think you need to spec this device and get
> an ID - what's the plan for that? Current hack of punting
> this to userspace isn't really any good long term.

There is work ongoing in QEMU to add a new vfio-user protocol to support
out-of-process PCI device emulation.  Perhaps an option would be to use
that protocol instead in UML too in the future?