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=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,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 52ED6C28CC0 for ; Wed, 29 May 2019 14:15:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 2663A2397F for ; Wed, 29 May 2019 14:15:46 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=gmx.net header.i=@gmx.net header.b="cjiDkunA" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726843AbfE2OPp (ORCPT ); Wed, 29 May 2019 10:15:45 -0400 Received: from mout.gmx.net ([212.227.17.22]:34147 "EHLO mout.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726139AbfE2OPp (ORCPT ); Wed, 29 May 2019 10:15:45 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gmx.net; s=badeba3b8450; t=1559139306; bh=Rq7oObVF7PbBU8BCo/pmurx3OjQKoIDTsbGxtlW2Dy8=; h=X-UI-Sender-Class:Subject:To:Cc:References:From:Date:In-Reply-To; b=cjiDkunAUr6yN5sZFn+h6RqPz0oraBvTeDB9fwihj0PwLpbNGGY7rZ3UkWGCV28BY bPSZmQ3HLKjpJte3SKfH845+Cinv8QlHFIRZsHa0DzIPaqBz8mn9hWPU69xsUMb/zo aQicZ4Af5c4atCPiOqOlUFU2fNR67QR4BACIAp4U= X-UI-Sender-Class: 01bb95c1-4bf8-414a-932a-4f6e2808ef9c Received: from [192.168.20.60] ([92.116.134.91]) by mail.gmx.com (mrgmx105 [212.227.17.168]) with ESMTPSA (Nemesis) id 1MJmGP-1hCXaq3m6j-00K5Pe; Wed, 29 May 2019 16:15:06 +0200 Subject: Re: [PATCH v3] parisc: Fix crash due alternative coding for NP iopdir_fdc bit To: John David Anglin , Sven Schnelle , Rolf Eike Beer Cc: Carlo Pisani , linux-parisc@vger.kernel.org, James Bottomley References: <20190527192000.GA17551@ls3530.dellerweb.de> <20190528153815.GB16860@t470p.stackframe.org> <674f8b61-e897-f657-68a2-648babca00be@bell.net> <1943613.tnj53yOHQY@daneel.sf-tec.de> <20190528173922.GA32192@t470p.stackframe.org> From: Helge Deller Openpgp: preference=signencrypt Autocrypt: addr=deller@gmx.de; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:c8XS9a7ceqywHz9QKIn7wPf4gmuED6SqPnJz9Y/n9dTJiFKWn0J gzAJd/Wqv3rYTygXkbWUMTYEKJWsl0gWXf5drMaPfmTVD75J2E8kbiTrAiS3XfPQ6514vBC 0/DJtkGAOFCCPqiPwFHzhh7xN8JzlLvujW1pQPDV3zxJQxWxiewOjff7yH9ajJG3QKzRBk9 1vHt49BgzPO5iTtij+yUg== X-UI-Out-Filterresults: notjunk:1;V03:K0:+HjgOU7T0Hg=:jwFhSUPWtc52do9LYRoUET aRYN6i6kIaOxKK6HndR8cNbDCSgzP+jKoABjXbFhe6mLF0lLBQn1NBmN65lsVpsdWAJ9xkhhZ 7N7UMi6dEhq9ucs+B2Z8LUAlc+0pokOaRqmGYhgpKPWXkD4LWeJXUIyH4ga3EXmkRrucXJ+fQ lG0TvjDG4DKkExajW6peilfSEnyTFGsDfAyQKoA1xhQTosSBcUvdPllg9sgcVrc3yF4phnPZ1 hKV7lVMOX1PD9kKUrnbgUGLh0nUSVzB5xo8UPmAopkPAsuiEYP27W5KtQndxWkFkBVupk80cF 1LVPHwPpdbEp0qXkrKlntVS2ca65RKEfz/p0dQZFQEL34ig8cXkUIlrdPEJ5Q1zSSHAw/Mtwq se0hSiwigFuwd8wu4FIynv2tB+2wh/8de7IIsXKJinbX/cIaKcrHaftNO1A52kI9lEyKn3Jgy Mqvg8oE0O4rLAdmje4i9NtavR5Yh9rUlBj7Ifh3xdibFmcSNEKp1faxTbCa2Jv776/wwHFuH5 R2BkEjJQ/oinWXJu+57MOzmDiBqFjbHnPTo7rDTTj9LJXs3e7XM569tfdGgDoI659LhWyTsGz mB7NOasLzC/WNXiKfGMh+tdxjMZE85TghBf1dy60aIaWiBpJMTIew8qA/LV7+9olO+Pf8MDJU yN7LH7p/3ohqNUEDOZoMOWOtTyKiRD/PG2MPnGyD8tt+VkCxHYP9RQCFvs5hWRaY8asVcqbfj JVpNVZ3bk3EUZF73iqeQtcG0Wr4Kq5mffXfibOpv5WFfG6NDN7Uw2EaIrYQ0052SXaBC4J/Tl EJWNXgt6tbTHJ4I8eRPuKRxyd6OXxJ1/yo9pKoESvT7G0oCasnv62uQKCBR+Aq0nR8gafNbkB DTMHAkeO4GkoPmSwsGugtlh34ewfvnYrmbOzSWy86P9LmQmw2VNytRLTb1fpFATlVEfyMaTO1 1LBOjwnxoiBRo86JZ/kF270WXSpRwT6bwg2Vr+nACEVy/neRCip1Q Sender: linux-parisc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-parisc@vger.kernel.org On 28.05.19 20:40, John David Anglin wrote: > On 2019-05-28 1:39 p.m., Sven Schnelle wrote: >> Hi, >> >> On Tue, May 28, 2019 at 07:24:29PM +0200, Rolf Eike Beer wrote: >>> Am Dienstag, 28. Mai 2019, 19:06:48 CEST schrieb John David Anglin: >>>> On 2019-05-28 11:38 a.m., Sven Schnelle wrote: >>>>> Interesting. Now that you mention it i see that my C3750 reports the= same. >>>>> Google returned the following page >>>>> https://support.hpe.com/hpsc/swd/public/detail?swItemId=3DPF_CCJ7002= 0 >>>>> >>>>> Which is 2.0, and only mentions "C3650/C3700/C3750/J6700/J6750 firmw= are" >>>>> So maybe these machines have NP set, and machines "below" (like C360= 0) >>>>> don't have it set. >>>>> >>>>> I wonder what happens if you try to flash a 5.0 firmware to such a b= ox. >>>> >>>> From what I see, the "C3650/C3700/C3750/J6700/J6750" and "HP 9000 Mod= el >>>> B1000/C3000/J5000/J7000" use different firmware. >>> >>> Which makes sense as the former have use a 8600 CPU, while the latter = have >>> 8700 ones. >> >> Exactly. And as: >> >> a) All C3600 PDC versions clear the NP bit >> b) All C37XX/J5000 PDC version set the NP bit >> >> i don't think there's some bug in the PDC. I would guess that the patch= Carlo >> reported to fix issues is just hiding the real problem. Would be intere= sting >> to run Carlo's Test on a C37XX. > > Probably, hardware cache coherent I/O is not implemented correctly for E= lroy based systems. > https://www.hpl.hp.com/hpjournal/96feb/feb96a6.pdf > Does it work on C360? I slowly start to get confused... Just thinking about another possibility: Maybe we can rely on the value of= the NP iopdir_fdc bit only on machines with >=3D PA8700 CPUs? For older machines (which would need opdir_fdc) HP-UX or other operating systems decides on the found CPU. This would explain why it's not set on Carlo's C3600, and if Sven's C240 (with a PA8200 CPU) doesn't has the bit set too, then this could explain t= his theory. Helge