From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoffer Dall Subject: Re: [PATCH] arm: document "mach-virt" platform. Date: Sun, 2 Feb 2014 20:56:38 -0800 Message-ID: <20140203045638.GB4167@cbox> References: <1391098262-15944-1-git-send-email-ian.campbell@citrix.com> <52EA83D6.9050506@codeaurora.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <52EA83D6.9050506-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Christopher Covington Cc: Ian Campbell , Mark Rutland , devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Arnd Bergmann , Pawel Moll , Stefano Stabellini , Marc Zyngier , Will Deacon , linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Rob Herring , Kumar Gala , Olof Johansson , linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org List-Id: devicetree@vger.kernel.org On Thu, Jan 30, 2014 at 11:54:46AM -0500, Christopher Covington wrote: > Hi Ian, > > On 01/30/2014 11:11 AM, Ian Campbell wrote: > > mach-virt has existed for a while but it is not written down what it actually > > consists of. Although it seems a bit unusual to document a binding for an > > entire platform since mach-virt is entirely virtual it is helpful to have > > something to refer to in the absence of a single concrete implementation. > > > > I've done my best to capture the requirements based on the git log and my > > memory/understanding. > > > > While here remove the xenvm dts example, the Xen tools will now build a > > suitable mach-virt compatible dts when launching the guest. > [...] > > +The platform may also provide hypervisor specific functionality > > +(e.g. PV I/O), if it does so then this functionality must be > > +discoverable (directly or indirectly) via device tree. > > I think it would be informative to provide pointers here to commonly used > paravirtualized devices, especially VirtIO PCI/MMIO. > I disagree: that would only encourage limited testing or assumptions about these specific devices when really this platform is just a bare-bones platform driven by device tree which should make no preference, whatsoever, about which devices are used with the platform. -Christoffer -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html