From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Rafael J. Wysocki" Subject: Re: [PATCH v4 18/18] Documentation: ACPI for ARM64 Date: Fri, 19 Sep 2014 01:20:52 +0200 Message-ID: <6318202.hl003vettj@vostro.rjw.lan> References: <1410530416-30200-1-git-send-email-hanjun.guo@linaro.org> <201409180122.10631.arnd@arndb.de> <20140917234036.GC2464@xora-yoga-13> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7Bit Return-path: Received: from v094114.home.net.pl ([79.96.170.134]:57799 "HELO v094114.home.net.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1750705AbaIRXBS (ORCPT ); Thu, 18 Sep 2014 19:01:18 -0400 In-Reply-To: <20140917234036.GC2464@xora-yoga-13> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Graeme Gregory Cc: Arnd Bergmann , Graeme Gregory , Matthew Garrett , Hanjun Guo , Catalin Marinas , Mark Rutland , Olof Johansson , Grant Likely , Will Deacon , linaro-acpi@lists.linaro.org, Liviu Dudau , Lv Zheng , Rob Herring , Lorenzo Pieralisi , Daniel Lezcano , Robert Moore , linux-acpi@vger.kernel.org, Charles.Garcia-Tobin@arm.com, Robert Richter , Jason Cooper , Marc Zyngier , Jon Masters , Mark Brown , Bjorn Helgaas , linux-arm-kerne On Wednesday, September 17, 2014 04:40:36 PM Graeme Gregory wrote: > On Thu, Sep 18, 2014 at 01:22:10AM +0200, Arnd Bergmann wrote: > > On Wednesday 17 September 2014, Graeme Gregory wrote: > > > It sounds like from the discussions in other threads that ARM64 should > > > be following x86 and re-using DT bindings here. In which case there is > > > not need to submit things to UEFI organisation. > > > > > > What I got a little lost in has there been a formal decision about DT > > > bindings in _DSD? > > > > I think this is a discussion that still needs to happen: either we should > > recommend everyone to use _DSD in favor of the alternatives, or we > > should prohibit the use of _DSD. I have heard arguments both ways, but > > hopefully we can find an easy answer. > > > > This discussion is just not going to happen until people at @redhat.com > and people who have currently announced/released hardware are actually > willing to start talking about it. > > Id love to be able to put my foot down and ban the use of _DSD for > servers but I suspect that will not happen. I'll probably should stay away from this discussion, but I can't resist. :-) Please imagine the situation in which the same IP block is included in an ARM64 SoC and in an x86 SoC that ships with ACPI tables and a _DSD for that device in them. What benefit would be there from disallowing systems based on the ARM64 SoC in question to ship the same _DSD in their ACPI tables? -- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center.