From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:51588 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751649AbeCNQf1 (ORCPT ); Wed, 14 Mar 2018 12:35:27 -0400 Received: from pps.filterd (m0098417.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.22/8.16.0.22) with SMTP id w2EGXjrU007829 for ; Wed, 14 Mar 2018 12:35:27 -0400 Received: from e34.co.us.ibm.com (e34.co.us.ibm.com [32.97.110.152]) by mx0a-001b2d01.pphosted.com with ESMTP id 2gq446293e-1 (version=TLSv1.2 cipher=AES256-SHA256 bits=256 verify=NOT) for ; Wed, 14 Mar 2018 12:35:27 -0400 Received: from localhost by e34.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Wed, 14 Mar 2018 10:35:26 -0600 From: "Desnes A. Nunes do Rosario" To: linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Cc: bhelgaas@google.com, benh@kernel.crashing.org, paulus@samba.org, mpe@ellerman.id.au, ruscur@russell.cc, aik@ozlabs.ru, david@gibson.dropbear.id.au, fbarrat@linux.vnet.ibm.com, brking@linux.vnet.ibm.com Subject: [PATCH 0/2] Silent PCI realignment messages during boot Date: Wed, 14 Mar 2018 13:34:53 -0300 Message-Id: <20180314163455.15854-1-desnesn@linux.vnet.ibm.com> Sender: linux-pci-owner@vger.kernel.org List-ID: This patchset introduces PCI_DEV_FLAGS_QUIET_PCI_REALIGN attribute in pci_dev_flags which informs the pci subsystem to suppress all realignment messages. Powerpc has aligned all of its PCI resources to its PAGE_SIZE, and this feature can be easily used on any other arch through the __weak pcibios_default_alignment() interface. However, since all PCI resources will be now realigned during boot, the following messages will not only flood the system logs, but can be inter- preted as a false positive for total PCI failure on the system. [root@system user]# dmesg | grep -i disabling [ 0.692270] pci 0000:00:00.0: Disabling memory decoding and releasing memory resources [ 0.692324] pci 0000:00:00.0: disabling bridge mem windows [ 0.729134] pci 0001:00:00.0: Disabling memory decoding and releasing memory resources [ 0.737352] pci 0001:00:00.0: disabling bridge mem windows [ 0.776295] pci 0002:00:00.0: Disabling memory decoding and releasing memory resources [ 0.784509] pci 0002:00:00.0: disabling bridge mem windows ... and goes on for all PCI devices ... Thus, this patchset provides a way for drivers to silent these messages if the PCI_DEV_FLAGS_QUIET_PCI_REALIGN is turned on. Moreover, it also tweaks this flag during boot on powerpc. Fixes: 38274637699 ("powerpc/powernv: Override pcibios_default_alignment() to force PCI devices to be page aligned") Signed-off-by: Desnes A. Nunes do Rosario Desnes A. Nunes do Rosario (2): pci: Addition of PCI_DEV_FLAGS_QUIET_PCI_REALIGN attribute to the PCI subsystem powerpc/powernv: Tweak PCI_DEV_FLAGS_QUIET_PCI_REALIGN on/off during boot arch/powerpc/platforms/powernv/pci.c | 14 ++++++++++++++ drivers/pci/pci.c | 3 ++- drivers/pci/setup-res.c | 3 ++- include/linux/pci.h | 2 ++ 4 files changed, 20 insertions(+), 2 deletions(-) -- 2.14.3