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 998E1C4708D for ; Wed, 4 Jan 2023 14:51:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S239252AbjADOul (ORCPT ); Wed, 4 Jan 2023 09:50:41 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40408 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234523AbjADOuf (ORCPT ); Wed, 4 Jan 2023 09:50:35 -0500 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C408D15FF3; Wed, 4 Jan 2023 06:50:34 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 5F0D66176C; Wed, 4 Jan 2023 14:50:34 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 94910C43392; Wed, 4 Jan 2023 14:50:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1672843833; bh=KJAN/cjZa/oRtHLG1wkUIzfNI68wvr0PbA81SJphtC8=; h=Date:From:To:Cc:Subject:In-Reply-To:From; b=R0XDFYZB+t6W09IrepVidTRhlkuHdUtjWg7agpX2Dut/oJ9AEOeUXjDJX5HfAxbSi H9q+Hyk5M+iBLxEXRaapGqJ0lGZFT4I9O1bORlshpdtvQ9qaXCpDYIfB6CXt0Oqq62 aovde42u9PwZmjFht7TXFzFyzGk34YyGlBlI0snhXr8p+WReEbIu2yjhTfqSisQERJ 8wcjw1O7PhN2aG6bTMJo16SDwFWunbnekYeOH2G/Kt9R74O8oYtjxFOE6ZCF5e/Wtz j1x0jHpAlq/qXDlANv6JPaxXq1EpXzCKdf6VpPQEAPNBBN4uFdQ5M84x3Ra8QILWHm AorgDpXnfJqFg== Date: Wed, 4 Jan 2023 08:50:32 -0600 From: Bjorn Helgaas To: "Liang, Kan" Cc: bhelgaas@google.com, hdegoede@redhat.com, kernelorg@undead.fr, kjhambrick@gmail.com, 2lprbe78@duck.com, nicholas.johnson-opensource@outlook.com.au, benoitg@coeus.ca, mika.westerberg@linux.intel.com, wse@tuxedocomputers.com, mumblingdrunkard@protonmail.com, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, david.e.box@intel.com, yunying.sun@intel.com Subject: Re: Bug report: the extended PCI config space is missed with 6.2-rc2 Message-ID: <20230104145032.GA1069244@bhelgaas> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jan 04, 2023 at 09:39:56AM -0500, Liang, Kan wrote: > Hi Bjorn, > > Happy new year! > > We found some PCI issues with the latest 6.2-rc2. > > - Using the lspci -xxxx, the extended PCI config space of all PCI > devices are missed with the latest 6.2-rc2. The system we used had 932 > PCI devices, at least 800 which have extended space as seen when booted > into a 5.15 kernel. But none of them appeared in 6.2-rc2. > - The drivers which rely on the information in the extended PCI config > space don't work anymore. We have confirmed that the perf uncore driver > (uncore performance monitoring) and Intel VSEC driver (telemetry) don't > work in 6.2-rc2. There could be more drivers which are impacted. > > After a bisect, we found the regression is caused by the below commit > 07eab0901ede ("efi/x86: Remove EfiMemoryMappedIO from E820 map"). > After reverting the commit, the issues are gone. > > Could you please take a look at the issues? Certainly. Can you capture the complete dmesg log, please? Bjorn