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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2F84CC2BB3F for ; Sat, 18 Nov 2023 14:21:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229515AbjKROVx (ORCPT ); Sat, 18 Nov 2023 09:21:53 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36198 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229489AbjKROVw (ORCPT ); Sat, 18 Nov 2023 09:21:52 -0500 Received: from pepin.polanet.pl (pepin.polanet.pl [193.34.52.2]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DAB488F; Sat, 18 Nov 2023 06:21:47 -0800 (PST) Date: Sat, 18 Nov 2023 15:21:43 +0100 From: Tomasz Pala To: Bjorn Helgaas Cc: linux-pci@vger.kernel.org, Dan J Williams , Kan Liang , Tony Luck , David E Box , Yunying Sun , Dave Jiang , Mika Westerberg , Giovanni Cabiddu , Herbert Xu , Hans de Goede , Florent DELAHAYE , Konrad J Hambrick , Matt Hansen <2lprbe78@duck.com>, Nicholas Johnson , Benoit =?iso-8859-2?Q?Gr=E9goire?= , Werner Sembach , mumblingdrunkard@protonmail.com, linux-kernel@vger.kernel.org, Bjorn Helgaas , Sebastian Manciulea Subject: Re: [PATCH 2/2] x86/pci: Treat EfiMemoryMappedIO as reservation of ECAM space Message-ID: <20231118142143.GA14101@polanet.pl> References: <20231103191858.GA163196@bhelgaas> <20231109184405.GA488882@bhelgaas> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-2 Content-Disposition: inline In-Reply-To: <20231109184405.GA488882@bhelgaas> User-Agent: Mutt/1.5.20 (2009-06-14) Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org On Thu, Nov 09, 2023 at 12:44:05 -0600, Bjorn Helgaas wrote: >> https://bugzilla.kernel.org/show_bug.cgi?id=218050 >> >> I think the problem is that the MMCONFIG region is at >> [mem 0x80000000-0x8fffffff], and that is *also* included in one of the >> host bridge windows reported via _CRS: >> >> PCI: MMCONFIG for domain 0000 [bus 00-ff] at [mem 0x80000000-0x8fffffff] (base 0x80000000) >> pci_bus 0000:00: root bus resource [mem 0x80000000-0xfbffffff window] >> >> I'll try to figure out how to deal with that. In the meantime, would >> you mind attaching the contents of /proc/iomem to the bugzilla? I > > I attached a debug patch to both bugzilla entries. If you could > attach the "acpidump" output and (if practical) boot a kernel with the > debug patch and attach the dmesg logs, that would be great. I've posted the files. There are signs of buggy BIOS, but I don't expect any firmware update to be released for this hw anymore. DMI: Supermicro X9DRi-LN4+/X9DR3-LN4+/X9DRi-LN4+/X9DR3-LN4+, BIOS 3.4 11/20/2019 .text .data .bss are not marked as E820_TYPE_RAM! tboot: non-0 tboot_addr but it is not of type E820_TYPE_RESERVED DMAR: [Firmware Bug]: No firmware reserved region can cover this RMRR [0x00000000df243000-0x00000000df251fff], contact BIOS vendor for fixes DMAR: [Firmware Bug]: Your BIOS is broken; bad RMRR [0x00000000df243000-0x00000000df251fff] BTW is there a reason for this logging discrepancy? efi: Remove mem173: MMIO range=[0xe0000000-0xefffffff] (256MB) from e820 map efi: Not removing mem71: MMIO range=[0xe0000000-0xefffffff] (262144KB) from e820 map efi: Not removing mem74: MMIO range=[0xff000000-0xffffffff] (16384KB) from e820 map efi: Remove mem176: MMIO range=[0xff000000-0xffffffff] (16MB) from e820 map This is arch/x86/platform/efi/efi.c: static void __init efi_remove_e820_mmio(void) Remove mem%02u: MMIO range=[0x%08llx-0x%08llx] (%lluMB) ... size >> 20 Not removing mem%02u: MMIO range=[0x%08llx-0x%08llx] (%lluKB) ... size >> 10 -- Tomasz Pala