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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT 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 E4F7AC432C0 for ; Tue, 19 Nov 2019 05:55:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BAB8021850 for ; Tue, 19 Nov 2019 05:55:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1574142906; bh=XnRIcdZVlp6No/mC06k2e6r9GyXH2JlTE8agqW0ry2g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=wKe3CFFrxT+hPNaIdKqIPHfkAICTiJ8qd0UDtHmV4NyUPvVlZ10woIIABJPw1/I9B 3HY9YFoD5HuCep1H1DGsDRn8xwGmukNfIfm79apFL4HDalT94x0lp6zv33jQop2I3k 5c3ERVPUtimp2pw3irxeAuRi1+guLe8dNayGuoKs= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732233AbfKSFzF (ORCPT ); Tue, 19 Nov 2019 00:55:05 -0500 Received: from mail.kernel.org ([198.145.29.99]:53340 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731631AbfKSFzE (ORCPT ); Tue, 19 Nov 2019 00:55:04 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 815F7208C3; Tue, 19 Nov 2019 05:55:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1574142903; bh=XnRIcdZVlp6No/mC06k2e6r9GyXH2JlTE8agqW0ry2g=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=v+5LacgwIOsKzdi4lBiPfXvwoYMFddsgOMcfKAStDHtdhxIiX5ylhJymm88hKL/UG 6/bVhMcD6vCLDkx7+P0zJlohd6ljaOJFZzHSd4g1mWH3Veb1MLiaUN1QFcS+Tjrh4m 8YfHOb9OJw95vcAsQryFvJKLuEOni7SL+GvtpGQ8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dexuan Cui , Thomas Gleixner , Michael Kelley , "H. Peter Anvin" , KY Srinivasan , Haiyang Zhang , Stephen Hemminger , "devel@linuxdriverproject.org" , Olaf Aepfle , Andy Whitcroft , Jason Wang , Vitaly Kuznetsov , Marcelo Cerri , Josh Poulson , Sasha Levin Subject: [PATCH 4.14 214/239] x86/hyperv: Suppress "PCI: Fatal: No config space access function found" Date: Tue, 19 Nov 2019 06:20:14 +0100 Message-Id: <20191119051338.898151241@linuxfoundation.org> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20191119051255.850204959@linuxfoundation.org> References: <20191119051255.850204959@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Dexuan Cui [ Upstream commit 2f285f46240d67060061d153786740d4df53cd78 ] A Generation-2 Linux VM on Hyper-V doesn't have the legacy PCI bus, and users always see the scary warning, which is actually harmless. Suppress it. Signed-off-by: Dexuan Cui Signed-off-by: Thomas Gleixner Reviewed-by: Michael Kelley Cc: "H. Peter Anvin" Cc: KY Srinivasan Cc: Haiyang Zhang Cc: Stephen Hemminger Cc: "devel@linuxdriverproject.org" Cc: Olaf Aepfle Cc: Andy Whitcroft Cc: Jason Wang Cc: Vitaly Kuznetsov Cc: Marcelo Cerri Cc: Josh Poulson Link: https://lkml.kernel.org/r/ --- arch/x86/hyperv/hv_init.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c index 2e9d58cc371e6..2653b7b25d176 100644 --- a/arch/x86/hyperv/hv_init.c +++ b/arch/x86/hyperv/hv_init.c @@ -17,6 +17,7 @@ * */ +#include #include #include #include @@ -101,6 +102,22 @@ static int hv_cpu_init(unsigned int cpu) return 0; } +static int __init hv_pci_init(void) +{ + int gen2vm = efi_enabled(EFI_BOOT); + + /* + * For Generation-2 VM, we exit from pci_arch_init() by returning 0. + * The purpose is to suppress the harmless warning: + * "PCI: Fatal: No config space access function found" + */ + if (gen2vm) + return 0; + + /* For Generation-1 VM, we'll proceed in pci_arch_init(). */ + return 1; +} + /* * This function is to be invoked early in the boot sequence after the * hypervisor has been detected. @@ -154,6 +171,8 @@ void hyperv_init(void) hyper_alloc_mmu(); + x86_init.pci.arch_init = hv_pci_init; + /* * Register Hyper-V specific clocksource. */ -- 2.20.1