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=-5.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS 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 76245C2D0F4 for ; Thu, 2 Apr 2020 03:50:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4DD1F20784 for ; Thu, 2 Apr 2020 03:50:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="j1BLyfPi" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387443AbgDBDuQ (ORCPT ); Wed, 1 Apr 2020 23:50:16 -0400 Received: from mail-il1-f194.google.com ([209.85.166.194]:34641 "EHLO mail-il1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732498AbgDBDuP (ORCPT ); Wed, 1 Apr 2020 23:50:15 -0400 Received: by mail-il1-f194.google.com with SMTP id t11so2283818ils.1 for ; Wed, 01 Apr 2020 20:50:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=un3fCtdFL30YthKT96CUaub/mKOgXUtAMj2aFT/0PG4=; b=j1BLyfPilq3TJB3KimcIBBGzUr9NSBHL9CZX0ZLvnEhr10RUE+BzgwAVbkboZvzJbw p3BYhlMqx54KQgTKkG5lwMplSjQXdoNkXd6tEJKK3Ow86YPUz9oF50vYJT+DfEqEOxYC 9orFV88QTGN5X23IO494ia9LQ6tqUZLtLTwAChrveledyaZs21kUVGzJaxM2U41am4FJ Yzm4Yffn1e/pPB99dk1RtDx+wheEOC6UxXljP5f2wz0KZBjj7tsaeqI0Zzkl2tGQPABp D6g9lryQGxQKow4hC6WDUEqU58ef+Z9XAu/Dw2FHqwgyQtnWJzmpiAtoYyW7fB3tXiP9 JaJg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=un3fCtdFL30YthKT96CUaub/mKOgXUtAMj2aFT/0PG4=; b=IxEeqz/ob6CtiffJMn1CYX79bmL491+cMVthUHcYYQo3VeSluriowBg6fWaosJbiRW I7aRe1TVd5UUTBY568ZKcMVgLe7rZcA+S2XDXl+INb38gg1tZ+WIKNDETE3gHyKO62A5 LRsGFZ97tTm9rwTwftgA4nFA5NSFAQEeGNplJ/rUvtI7N7RsHs005BVY1YdtrCbd3/Hz eM7xkt6+btAS/TjEW3X2eo/36VKssLgorwYcKLssqLYWYN99r54Lj6IpfGFc35CqT9mE DX58MGqWf/vuFSJ7crAnZjT5t6OJwJrW1VSK6g14Lai4kHF4m+RRpA2n1ZaIx8eejxaH 0R+Q== X-Gm-Message-State: AGi0PubGAxsDmHpvPMmxDJf37CnFqpEpPvayT10OuRhdSu2+qmWpe79i 3309ygUKWuTXdmvNRLAGZ54wZN22uilv+cI+L+Y= X-Google-Smtp-Source: APiQypJyEN+5v6EGwS7GGD77C8TR5iHpI3+yZLJ2qJhUBFcMxf+gIEB07Pj3Y1zyNjFY+2mASs/kfz/PFBneqBUdOvU= X-Received: by 2002:a92:39cc:: with SMTP id h73mr1225341ilf.298.1585799414632; Wed, 01 Apr 2020 20:50:14 -0700 (PDT) MIME-Version: 1.0 References: <20200327071202.2159885-1-alastair@d-silva.org> <2d6901d60877$16aa7a90$43ff6fb0$@d-silva.org> <87imiituxm.fsf@mpe.ellerman.id.au> In-Reply-To: <87imiituxm.fsf@mpe.ellerman.id.au> From: "Oliver O'Halloran" Date: Thu, 2 Apr 2020 14:50:03 +1100 Message-ID: Subject: Re: [PATCH v4 00/25] Add support for OpenCAPI Persistent Memory devices To: Michael Ellerman Cc: "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?Q?C=C3=A9dric_Le_Goater?= , Anju T Sudhakar , Hari Bathini , Thomas Gleixner , Greg Kurz , Nicholas Piggin , Masahiro Yamada , Alexey Kardashevskiy , Linux Kernel Mailing List , linuxppc-dev , linux-nvdimm , Linux MM Content-Type: text/plain; charset="UTF-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. There's an OPAL call API reference here: http://open-power.github.io/skiboot/doc/opal-api/index.html Oliver