From mboxrd@z Thu Jan 1 00:00:00 1970 From: Scott Wood Subject: Re: [PATCH 7/7] [v2] drivers/misc: introduce Freescale hypervisor management driver Date: Fri, 3 Jun 2011 11:22:13 -0500 Message-ID: <20110603112213.4f4d1b4e@schlenkerla.am.freescale.net> References: <1306953337-15698-1-git-send-email-timur@freescale.com> <201106012340.14237.arnd@arndb.de> <20110601172412.761ff799@schlenkerla.am.freescale.net> <201106031728.43707.arnd@arndb.de> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <201106031728.43707.arnd@arndb.de> Sender: linux-console-owner@vger.kernel.org List-ID: Content-Type: text/plain; charset="us-ascii" To: Arnd Bergmann Cc: Timur Tabi , kumar.gala@freescale.com, linux-kernel@vger.kernel.org, akpm@kernel.org, linux-console@vger.kernel.org, greg@kroah.com, linuxppc-dev@lists.ozlabs.org On Fri, 3 Jun 2011 17:28:43 +0200 Arnd Bergmann wrote: > On Thursday 02 June 2011, Scott Wood wrote: > > I wanted to have the hypervisor take an update dtb (we already have special > > meta-properties for things like deletion as part of the hv config > > mechanism). But others on the project wanted to keep it simple, and so > > get/set property it was. :-/ > > > > It's unlikely to change at this point without a real need. > > > > As for a filesystem interface, it's not a good match either. > > You can't iterate over anything to read out the full tree from the hv. > > kexec iterates over /proc/device-tree to create a dts blob. That's irrelevant, because we're not talking about that device tree. We're talking about the device tree of another hypervisor guest. > > You can't delete anything. > > rm, rmdir > > > You can't create empty nodes. > > mkdir I know how to operate a filesystem. You can't do these operations *on another guest's device tree through the hv interface*. > > There would still be other ioctls needed for starting/stopping the > > partition, etc. > > Right, although you could model them as a file interface as well. > KVMfs is one example doing that. And what would be the benefit of this major restructuring and added complexity? -Scott