From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752489AbeCNQfa (ORCPT ); Wed, 14 Mar 2018 12:35:30 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:44546 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751289AbeCNQf1 (ORCPT ); Wed, 14 Mar 2018 12:35:27 -0400 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 X-Mailer: git-send-email 2.14.3 X-TM-AS-GCONF: 00 x-cbid: 18031416-0016-0000-0000-000008642E50 X-IBM-SpamModules-Scores: X-IBM-SpamModules-Versions: BY=3.00008673; HX=3.00000241; KW=3.00000007; PH=3.00000004; SC=3.00000254; SDB=6.01002988; UDB=6.00510401; IPR=6.00782318; MB=3.00020033; MTD=3.00000008; XFM=3.00000015; UTC=2018-03-14 16:35:25 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 18031416-0017-0000-0000-00003DD75132 Message-Id: <20180314163455.15854-1-desnesn@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2018-03-14_08:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 impostorscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1709140000 definitions=main-1803140187 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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