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=-5.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 455D2C43331 for ; Thu, 2 Apr 2020 10:06:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 199872074D for ; Thu, 2 Apr 2020 10:06:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=ellerman.id.au header.i=@ellerman.id.au header.b="BIAYcmrK" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387841AbgDBKGA (ORCPT ); Thu, 2 Apr 2020 06:06:00 -0400 Received: from ozlabs.org ([203.11.71.1]:52063 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728135AbgDBKGA (ORCPT ); Thu, 2 Apr 2020 06:06:00 -0400 Received: from authenticated.ozlabs.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by mail.ozlabs.org (Postfix) with ESMTPSA id 48tJc24ckyz9sR4; Thu, 2 Apr 2020 21:05:54 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ellerman.id.au; s=201909; t=1585821957; bh=VWV5VVYaAJNLZ0qhNZ2vXZ3ZVuH1QjojCUmH4J7cvRM=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=BIAYcmrKq1LF5D5nT2gJkPD5FXCcgc658kciTx3sX+axQbjk3V2h07eqg6P3sQFtw WZH2du4hEAjbq6MucoA118QF1GDycOJONVlClQKdeEOwTgpwMgzHQgHoLHHY/99h8q NZF0h2aW+zXmsTl1aZpEs8j7uHhm8YSAZfyiNiNehPYenQ7tc3BaEQkDi/60Fu+agl yFbkROHRPHEafu2+ycumDNj9Sn85R4SRDp0JrhXlvEzFZRjbsIjGWgCOkWGnS8Dgxv KCEXJZ95U3du4XOtVJMWjWbxkddWIX/CG9xoI/0/E4gWVMxEhV/VNg7slBH7PHXuHY fzkz6rZ7j6Jgw== From: Michael Ellerman To: Oliver O'Halloran 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 Subject: Re: [PATCH v4 00/25] Add support for OpenCAPI Persistent Memory devices In-Reply-To: References: <20200327071202.2159885-1-alastair@d-silva.org> <2d6901d60877$16aa7a90$43ff6fb0$@d-silva.org> <87imiituxm.fsf@mpe.ellerman.id.au> Date: Thu, 02 Apr 2020 21:06:01 +1100 Message-ID: <87bloatd6e.fsf@mpe.ellerman.id.au> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org "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 ;) > There's an OPAL call API reference here: > http://open-power.github.io/skiboot/doc/opal-api/index.html Even better. cheers