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=-5.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no 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 3131CC49EA6 for ; Thu, 24 Jun 2021 18:25:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 0ED9D60FD9 for ; Thu, 24 Jun 2021 18:25:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232397AbhFXS2E (ORCPT ); Thu, 24 Jun 2021 14:28:04 -0400 Received: from angie.orcam.me.uk ([78.133.224.34]:59904 "EHLO angie.orcam.me.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229464AbhFXS2B (ORCPT ); Thu, 24 Jun 2021 14:28:01 -0400 Received: by angie.orcam.me.uk (Postfix, from userid 500) id B55C092009C; Thu, 24 Jun 2021 20:25:40 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by angie.orcam.me.uk (Postfix) with ESMTP id AE16B92009B; Thu, 24 Jun 2021 20:25:40 +0200 (CEST) Date: Thu, 24 Jun 2021 20:25:40 +0200 (CEST) From: "Maciej W. Rozycki" To: Nikolai Zhubr cc: Arnd Bergmann , Thomas Gleixner , Heiner Kallweit , netdev , the arch/x86 maintainers , Ingo Molnar , Borislav Petkov , "H. Peter Anvin" Subject: Re: Realtek 8139 problem on 486. In-Reply-To: <60D4C75C.30701@gmail.com> Message-ID: References: <60B24AC2.9050505@gmail.com> <60B560A8.8000800@gmail.com> <49f40dd8-da68-f579-b359-7a7e229565e1@gmail.com> <60B611C6.2000801@gmail.com> <60B65BBB.2040507@gmail.com> <877dipgyrb.ffs@nanos.tec.linutronix.de> <60D1DAC1.9060200@gmail.com> <60D22F1D.1000205@gmail.com> <60D4C75C.30701@gmail.com> User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Hi Nikolai, > Meanwhile I've captured a similar log from another (and actually this one is > my main concern because it can not be replaced easily): > > https://pastebin.com/NVfRcMww > > Something is clearly different here, 8259A.pl reports all irqs are edge no > matter what. BIOS setup only offers some strange "PCI IDE IRQ mode" > (Edge/Level) and apparently it has no effect anyway. Such an option was common in BIOS configuration of the time, due to odd arrangements with early PCI ATA interfaces, such as being equipped with an ISA stub board with a connecting cable to route IRQ14/15 from an ISA slot. Anyway, this the ALi M1489/M1487 chipset and no datasheet is easily available (perhaps Nvidia, which bought the chipset part of ALi back in 2006, has a copy, but I wouldn't bet on it). A product brief is available that says the chipset supports PCI steering, but we can only guess how it works. Please try the debug patch I sent with the previous message and maybe it'll dump the PIRQ router, which may or may not help. Choosing the CONFIG_PCI_GOBIOS option may also reveal something along with said patch. Maciej