From patchwork Fri Mar 25 15:04:38 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 554631 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 DCE96C433EF for ; Fri, 25 Mar 2022 15:05:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1359478AbiCYPGc (ORCPT ); Fri, 25 Mar 2022 11:06:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33560 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1356712AbiCYPGb (ORCPT ); Fri, 25 Mar 2022 11:06:31 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7FF0CA774A; Fri, 25 Mar 2022 08:04:56 -0700 (PDT) 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 ams.source.kernel.org (Postfix) with ESMTPS id 2B085B828FA; Fri, 25 Mar 2022 15:04:55 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 74438C340E9; Fri, 25 Mar 2022 15:04:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1648220693; bh=3nLeSuO3ONv5EuSYqta8DDm/dhrSPSeF/wXpTNSHMZY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IGlag67vFxlbdGn68m5QcHJMKeuiAtoC7oBOtjgmeuCcfO/NBnVNBXbu/FQpevFo6 uXC7Htqu/UiYee72/RLugJr20VKk7TgPh96qchrhsVbDl83KLRxepUtnUIO7e0Plhy bX1OsGIkTxTWFizOPaS3+zTpJz9amdlt8n5v5N7Q= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Mark Cilissen , Hans de Goede , "Rafael J. Wysocki" Subject: [PATCH 4.9 10/14] ACPI / x86: Work around broken XSDT on Advantech DAC-BJ01 board Date: Fri, 25 Mar 2022 16:04:38 +0100 Message-Id: <20220325150415.999784254@linuxfoundation.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220325150415.694544076@linuxfoundation.org> References: <20220325150415.694544076@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Mark Cilissen commit e702196bf85778f2c5527ca47f33ef2e2fca8297 upstream. On this board the ACPI RSDP structure points to both a RSDT and an XSDT, but the XSDT points to a truncated FADT. This causes all sorts of trouble and usually a complete failure to boot after the following error occurs: ACPI Error: Unsupported address space: 0x20 (*/hwregs-*) ACPI Error: AE_SUPPORT, Unable to initialize fixed events (*/evevent-*) ACPI: Unable to start ACPI Interpreter This leaves the ACPI implementation in such a broken state that subsequent kernel subsystem initialisations go wrong, resulting in among others mismapped PCI memory, SATA and USB enumeration failures, and freezes. As this is an older embedded platform that will likely never see any BIOS updates to address this issue and its default shipping OS only complies to ACPI 1.0, work around this by forcing `acpi=rsdt`. This patch, applied on top of Linux 5.10.102, was confirmed on real hardware to fix the issue. Signed-off-by: Mark Cilissen Cc: All applicable Reviewed-by: Hans de Goede Signed-off-by: Rafael J. Wysocki Signed-off-by: Greg Kroah-Hartman --- arch/x86/kernel/acpi/boot.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) --- a/arch/x86/kernel/acpi/boot.c +++ b/arch/x86/kernel/acpi/boot.c @@ -1324,6 +1324,17 @@ static int __init disable_acpi_pci(const return 0; } +static int __init disable_acpi_xsdt(const struct dmi_system_id *d) +{ + if (!acpi_force) { + pr_notice("%s detected: force use of acpi=rsdt\n", d->ident); + acpi_gbl_do_not_use_xsdt = TRUE; + } else { + pr_notice("Warning: DMI blacklist says broken, but acpi XSDT forced\n"); + } + return 0; +} + static int __init dmi_disable_acpi(const struct dmi_system_id *d) { if (!acpi_force) { @@ -1444,6 +1455,19 @@ static struct dmi_system_id __initdata a DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 360"), }, }, + /* + * Boxes that need ACPI XSDT use disabled due to corrupted tables + */ + { + .callback = disable_acpi_xsdt, + .ident = "Advantech DAC-BJ01", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "NEC"), + DMI_MATCH(DMI_PRODUCT_NAME, "Bearlake CRB Board"), + DMI_MATCH(DMI_BIOS_VERSION, "V1.12"), + DMI_MATCH(DMI_BIOS_DATE, "02/01/2011"), + }, + }, {} };