From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.3 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_2 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 03661C43331 for ; Thu, 2 Apr 2020 11:48:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D071C206D3 for ; Thu, 2 Apr 2020 11:48:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388109AbgDBLsp (ORCPT ); Thu, 2 Apr 2020 07:48:45 -0400 Received: from 20.mo1.mail-out.ovh.net ([188.165.45.168]:60602 "EHLO 20.mo1.mail-out.ovh.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2387477AbgDBLsp (ORCPT ); Thu, 2 Apr 2020 07:48:45 -0400 X-Greylist: delayed 2268 seconds by postgrey-1.27 at vger.kernel.org; Thu, 02 Apr 2020 07:48:44 EDT Received: from player697.ha.ovh.net (unknown [10.110.208.99]) by mo1.mail-out.ovh.net (Postfix) with ESMTP id 256871B9F36 for ; Thu, 2 Apr 2020 13:10:55 +0200 (CEST) Received: from kaod.org (lns-bzn-46-82-253-208-248.adsl.proxad.net [82.253.208.248]) (Authenticated sender: groug@kaod.org) by player697.ha.ovh.net (Postfix) with ESMTPSA id AEBE3110DE660; Thu, 2 Apr 2020 11:10:14 +0000 (UTC) Date: Thu, 2 Apr 2020 13:10:12 +0200 From: Greg Kurz To: Michael Ellerman Cc: Oliver O'Halloran , Alastair D'Silva , Dan Williams , "Aneesh Kumar K . V" , Benjamin Herrenschmidt , Paul Mackerras , Frederic Barrat , Andrew Donnellan , Arnd Bergmann , Greg Kroah-Hartman , Vishal Verma , Dave Jiang , Ira Weiny , Andrew Morton , Mauro Carvalho Chehab , "David S. Miller" , Rob Herring , Anton Blanchard , Krzysztof Kozlowski , Mahesh Salgaonkar , Madhavan Srinivasan , =?UTF-8?B?Q8OpZHJpYw==?= Le Goater , Anju T Sudhakar , Hari Bathini , Thomas Gleixner , Nicholas Piggin , Masahiro Yamada , Alexey Kardashevskiy , Linux Kernel Mailing List , linuxppc-dev , linux-nvdimm , Linux MM Subject: Re: [PATCH v4 00/25] Add support for OpenCAPI Persistent Memory devices Message-ID: <20200402131012.579c7bf7@bahia.lan> In-Reply-To: <87bloatd6e.fsf@mpe.ellerman.id.au> References: <20200327071202.2159885-1-alastair@d-silva.org> <2d6901d60877$16aa7a90$43ff6fb0$@d-silva.org> <87imiituxm.fsf@mpe.ellerman.id.au> <87bloatd6e.fsf@mpe.ellerman.id.au> X-Mailer: Claws Mail 3.17.4 (GTK+ 2.24.32; x86_64-redhat-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Ovh-Tracer-Id: 14428970257110833585 X-VR-SPAMSTATE: OK X-VR-SPAMSCORE: -51 X-VR-SPAMCAUSE: gggruggvucftvghtrhhoucdtuddrgeduhedrtdeggdefvdcutefuodetggdotefrodftvfcurfhrohhfihhlvgemucfqggfjpdevjffgvefmvefgnecuuegrihhlohhuthemucehtddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenogfuuhhsphgvtghtffhomhgrihhnucdlgeelmdenucfjughrpeffhffvuffkjghfofggtgfgsehtjeertdertddvnecuhfhrohhmpefirhgvghcumfhurhiiuceoghhrohhugheskhgrohgurdhorhhgqeenucffohhmrghinhepghhithhhuhgsrdgtohhmpdhgihhthhhusgdrihhonecukfhppedtrddtrddtrddtpdekvddrvdehfedrvddtkedrvdegkeenucevlhhushhtvghrufhiiigvpedtnecurfgrrhgrmhepmhhouggvpehsmhhtphdqohhuthdphhgvlhhopehplhgrhigvrheileejrdhhrgdrohhvhhdrnhgvthdpihhnvghtpedtrddtrddtrddtpdhmrghilhhfrhhomhepghhrohhugheskhgrohgurdhorhhgpdhrtghpthhtoheplhhinhhugidqkhgvrhhnvghlsehvghgvrhdrkhgvrhhnvghlrdhorhhg Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, 02 Apr 2020 21:06:01 +1100 Michael Ellerman wrote: > "Oliver O'Halloran" writes: > > On Thu, Apr 2, 2020 at 2:42 PM Michael Ellerman wrote: > >> "Alastair D'Silva" writes: > >> >> -----Original Message----- > >> >> From: Dan Williams > >> >> > >> >> On Sun, Mar 29, 2020 at 10:23 PM Alastair D'Silva > >> >> wrote: > >> >> > > >> >> > *snip* > >> >> Are OPAL calls similar to ACPI DSMs? I.e. methods for the OS to invoke > >> >> platform firmware services? What's Skiboot? > >> > > >> > Yes, OPAL is the interface to firmware for POWER. Skiboot is the open-source (and only) implementation of OPAL. > >> > >> https://github.com/open-power/skiboot > >> > >> In particular the tokens for calls are defined here: > >> > >> https://github.com/open-power/skiboot/blob/master/include/opal-api.h#L220 > >> > >> And you can grep for the token to find the implementation: > >> > >> https://github.com/open-power/skiboot/blob/master/hw/npu2-opencapi.c#L2328 > > > > I'm not sure I'd encourage anyone to read npu2-opencapi.c. I find it > > hard enough to follow even with access to the workbooks. > > Compared to certain firmwares that run on certain other platforms it's > actually pretty readable code ;) > Forth rocks ! ;-) > > There's an OPAL call API reference here: > > http://open-power.github.io/skiboot/doc/opal-api/index.html > > Even better. > > cheers