On Wed, Feb 17, 2016 at 03:18:26PM -0600, Steven Royer wrote: > On 2016-02-16 16:18, Greg Kroah-Hartman wrote: > >On Tue, Feb 16, 2016 at 02:43:13PM -0600, Steven Royer wrote: > >>From: Steven Royer <seroyer@xxxxxxxxxx> > >> > >>The ibmvmc driver is a device driver for the POWER Virtual Management > >>Channel virtual adapter on the PowerVM platform. It is used to > >>communicate with the hypervisor for virtualization management. It > >>provides both request/response and asynchronous message support through > >>the /dev/ibmvmc node. > > > >What is the protocol for that device node? > The protocol is not currently published. I am pushing on getting it > published, but that process will take time. If you have a PowerVM system > with NovaLink, it would not be hard to reverse engineer it... If you don't > have a PowerVM system, then this driver isn't interesting anyway... You can't just expect us to review this code without at least having a clue as to how it is supposed to work? > >Where is the documentation here? Why does this have to be a character > >device? Why can't it fit in with other drivers of this type? > This is a character device for historical reasons. The short version is > that this driver is a clean-room rewrite of an AIX driver which made it a > character device. The user space application was ported from AIX to Linux > and it is convenient to have the AIX and Linux drivers match behavior where > possible. Note that we don't let random userspace applications dictate kernel api decisions, please make the best choice for this interface without being influenced by AIX. > >>+/* > >>+ * IBM Power Systems Virtual Management Channel Support. > >>+ * > >>+ * Copyright (c) 2004, 2016 IBM Corp. > >>+ * Dave Engebretsen engebret@xxxxxxxxxx > >>+ * Steven Royer seroyer@xxxxxxxxxxxxxxxxxx > >>+ * Adam Reznechek adreznec@xxxxxxxxxxxxxxxxxx > >>+ * > >>+ * This program is free software; you can redistribute it and/or > >>+ * modify it under the terms of the GNU General Public License > >>+ * as published by the Free Software Foundation; either version 2 > >>+ * of the License, or (at your option) any later version. > > > >I have to ask, but do you really mean "or any later version"? > This actually matches closely to other similar PowerVM virtual device > drivers, like ibmvscsi or ibmveth. That did not answer the question, picking a license in a cargo-cult manner is not a wise decision :( -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
