From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:35822 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758690AbcDISak (ORCPT ); Sat, 9 Apr 2016 14:30:40 -0400 Subject: Patch "x86/PCI: Mark Broadwell-EP Home Agent & PCU as having non-compliant BARs" has been added to the 4.4-stable tree To: bhelgaas@google.com, ak@linux.intel.com, gregkh@linuxfoundation.org Cc: , From: Date: Sat, 09 Apr 2016 11:30:35 -0700 Message-ID: <146022663536100@kroah.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org List-ID: This is a note to let you know that I've just added the patch titled x86/PCI: Mark Broadwell-EP Home Agent & PCU as having non-compliant BARs to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: x86-pci-mark-broadwell-ep-home-agent-pcu-as-having-non-compliant-bars.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From b894157145e4ac7598d7062bc93320898a5e059e Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Fri, 26 Feb 2016 09:15:11 -0600 Subject: x86/PCI: Mark Broadwell-EP Home Agent & PCU as having non-compliant BARs From: Bjorn Helgaas commit b894157145e4ac7598d7062bc93320898a5e059e upstream. The Home Agent and PCU PCI devices in Broadwell-EP have a non-BAR register where a BAR should be. We don't know what the side effects of sizing the "BAR" would be, and we don't know what address space the "BAR" might appear to describe. Mark these devices as having non-compliant BARs so the PCI core doesn't touch them. Signed-off-by: Bjorn Helgaas Tested-by: Andi Kleen Signed-off-by: Greg Kroah-Hartman --- arch/x86/pci/fixup.c | 7 +++++++ 1 file changed, 7 insertions(+) --- a/arch/x86/pci/fixup.c +++ b/arch/x86/pci/fixup.c @@ -540,3 +540,10 @@ static void twinhead_reserve_killing_zon } } DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x27B9, twinhead_reserve_killing_zone); + +static void pci_bdwep_bar(struct pci_dev *dev) +{ + dev->non_compliant_bars = 1; +} +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x6fa0, pci_bdwep_bar); +DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_INTEL, 0x6fc0, pci_bdwep_bar); Patches currently in stable-queue which might be from bhelgaas@google.com are queue-4.4/x86-pci-mark-broadwell-ep-home-agent-pcu-as-having-non-compliant-bars.patch queue-4.4/pci-disable-io-mem-decoding-for-devices-with-non-compliant-bars.patch