From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.linuxfoundation.org ([140.211.169.12]:42187 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932886AbbGHHXA (ORCPT ); Wed, 8 Jul 2015 03:23:00 -0400 Subject: Patch "x86/PCI: Use host bridge _CRS info on systems with >32 bit addressing" has been added to the 3.14-stable tree To: bhelgaas@google.com, alan@hazelgarth.co.uk, gregkh@linuxfoundation.org, jdayer@outlook.com Cc: , From: Date: Wed, 08 Jul 2015 00:22:58 -0700 Message-ID: <143634017824261@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: Use host bridge _CRS info on systems with >32 bit addressing to the 3.14-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-use-host-bridge-_crs-info-on-systems-with-32-bit-addressing.patch and it can be found in the queue-3.14 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let know about it. >>From 3d9fecf6bfb8b12bc2f9a4c7109895a2a2bb9436 Mon Sep 17 00:00:00 2001 From: Bjorn Helgaas Date: Tue, 9 Jun 2015 17:31:38 -0500 Subject: x86/PCI: Use host bridge _CRS info on systems with >32 bit addressing From: Bjorn Helgaas commit 3d9fecf6bfb8b12bc2f9a4c7109895a2a2bb9436 upstream. We enable _CRS on all systems from 2008 and later. On older systems, we ignore _CRS and assume the whole physical address space (excluding RAM and other devices) is available for PCI devices, but on systems that support physical address spaces larger than 4GB, it's doubtful that the area above 4GB is really available for PCI. After d56dbf5bab8c ("PCI: Allocate 64-bit BARs above 4G when possible"), we try to use that space above 4GB *first*, so we're more likely to put a device there. On Juan's Toshiba Satellite Pro U200, BIOS left the graphics, sound, 1394, and card reader devices unassigned (but only after Windows had been booted). Only the sound device had a 64-bit BAR, so it was the only device placed above 4GB, and hence the only device that didn't work. Keep _CRS enabled even on pre-2008 systems if they support physical address space larger than 4GB. Fixes: d56dbf5bab8c ("PCI: Allocate 64-bit BARs above 4G when possible") Reported-and-tested-by: Juan Dayer Reported-and-tested-by: Alan Horsfield Link: https://bugzilla.kernel.org/show_bug.cgi?id=99221 Link: https://bugzilla.opensuse.org/show_bug.cgi?id=907092 Signed-off-by: Bjorn Helgaas Signed-off-by: Greg Kroah-Hartman --- arch/x86/pci/acpi.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) --- a/arch/x86/pci/acpi.c +++ b/arch/x86/pci/acpi.c @@ -124,8 +124,10 @@ void __init pci_acpi_crs_quirks(void) { int year; - if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year < 2008) - pci_use_crs = false; + if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year < 2008) { + if (iomem_resource.end <= 0xffffffff) + pci_use_crs = false; + } dmi_check_system(pci_crs_quirks); Patches currently in stable-queue which might be from bhelgaas@google.com are queue-3.14/x86-pci-use-host-bridge-_crs-info-on-systems-with-32-bit-addressing.patch queue-3.14/x86-pci-use-host-bridge-_crs-info-on-foxconn-k8m890-8237a.patch