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 1DAF0C43331 for ; Thu, 2 Apr 2020 03:50:17 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id D3EBB20747 for ; Thu, 2 Apr 2020 03:50:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="j1BLyfPi" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D3EBB20747 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 66F238E0008; Wed, 1 Apr 2020 23:50:16 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 61FE58E0007; Wed, 1 Apr 2020 23:50:16 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 535358E0008; Wed, 1 Apr 2020 23:50:16 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0080.hostedemail.com [216.40.44.80]) by kanga.kvack.org (Postfix) with ESMTP id 3EE158E0007 for ; Wed, 1 Apr 2020 23:50:16 -0400 (EDT) Received: from smtpin20.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id EB1D0180AD80F for ; Thu, 2 Apr 2020 03:50:15 +0000 (UTC) X-FDA: 76661537190.20.veil68_3c77318f0ea32 X-HE-Tag: veil68_3c77318f0ea32 X-Filterd-Recvd-Size: 5200 Received: from mail-il1-f193.google.com (mail-il1-f193.google.com [209.85.166.193]) by imf25.hostedemail.com (Postfix) with ESMTP for ; Thu, 2 Apr 2020 03:50:15 +0000 (UTC) Received: by mail-il1-f193.google.com with SMTP id k29so2286981ilg.0 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=bOD1DVZpnsbpIBK47MgAX69WpFb4Q5z/Da4L9rQyKk4BoLk1tVEfy7wJb4V/C0y8Ak GkjaYz8JzqkcgU4QetaPJvPqw+p9jgK3ug1vzVw3yAHeROy6Nmsjlx/8FeZQtB61+bBX UhnJC2l+sUuHZ0GDFvZ9g60yRHRWvgRCufnDUc+thQsdP2n1yjhtjeBxJkCzmHaAFkbU 5oB3UNkYaO6OW7f3s1sSAdvQT+36MFBkNPZ+n+WhYpFBhPYaD/MwjksPjAL1YZCnscPS lTUIikGQBOVIpt1G+ov0cix+yCgVXMJ+46JAuymMVRRn55Xg40TKAPAl56ClL5iNUAI5 7k1A== X-Gm-Message-State: AGi0PuYgajSYXMhotJm067D4C/zyEzioqaAsHeeu5iFEt454KNT1NCvC Pqcw2DAszFG2orOVLiHjRBbOBr7IhzABS8rNpQ4= 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" X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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