linux-kernel - [LKP] [x86, pci] 123873321c4:

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Date:	Mon, 16 Mar 2015 09:47:57 +0800
From:	Huang Ying <ying.huang@...el.com>
To:	Tomasz Nowicki <tomasz.nowicki@...aro.org>
Cc:	Bjorn Helgaas <bhelgaas@...gle.com>,
	LKML <linux-kernel@...r.kernel.org>, LKP ML <lkp@...org>
Subject: [LKP] [x86, pci] 123873321c4:

FYI, we noticed the below changes on

git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci.git pci/ecam-tn4
commit 123873321c4c730f905c1c91de131772024f58ee ("x86, pci: Reorder logic of pci_mmconfig_insert() function")

We found new dmesg as below:

[    1.551098] ACPI: Using IOAPIC for interrupt routing
[    1.556290] HEST: Table parsing has been initialized.
[    1.561516] PCI: Using host bridge windows from ACPI; if necessary, use "pci=nocrs" and report a bug
[    1.571452] [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored
[    1.584690] ACPI: PCI Root Bridge [PCI0] (domain 0000 [bus 00-ff])
[    1.591050] acpi PNP0A08:00: _OSC: OS supports [ExtendedConfig ASPM ClockPM Segments MSI]
[    1.599823] acpi PNP0A08:00: _OSC: OS now controls [PCIeHotplug PME AER PCIeCapability]
[    1.608188] acpi PNP0A08:00: fail to add MMCONFIG information, can't access extended PCI configuration space under this bridge.
[    1.620188] PCI host bridge to bus 0000:00
[    1.624464] pci_bus 0000:00: root bus resource [bus 00-ff]
[    1.630124] pci_bus 0000:00: root bus resource [io  0x0000-0x0cf7 window]
[    1.637091] pci_bus 0000:00: root bus resource [io  0x0d00-0xffff window]
[    1.644060] pci_bus 0000:00: root bus resource [mem 0x000a0000-0x000bffff window]
[    1.651849] pci_bus 0000:00: root bus resource [mem 0xc0000000-0xffffffff window]
[    1.659652] pci 0000:00:00.0: [8086:3400] type 00 class 0x060000
[    1.665893] pci 0000:00:00.0: PME# supported from D0 D3hot D3cold
[    1.672252] pci 0000:00:01.0: [8086:3408] type 01 class 0x060400
[    1.678493] pci 0000:00:01.0: PME# supported from D0 D3hot D3cold
[    1.684857] pci 0000:00:02.0: [8086:3409] type 01 class 0x060400
[    1.691091] pci 0000:00:02.0: PME# supported from D0 D3hot D3cold
[    1.697446] pci 0000:00:03.0: [8086:340a] type 01 class 0x060400
[    1.703681] pci 0000:00:03.0: PME# supported from D0 D3hot D3cold
[    1.710039] pci 0000:00:04.0: [8086:340b] type 01 class 0x060400
[    1.716269] pci 0000:00:04.0: PME# supported from D0 D3hot D3cold

Something looks suspicious:

[    1.608188] acpi PNP0A08:00: fail to add MMCONFIG information, can't access extended PCI configuration space under this bridge.

Thanks,
Ying Huang


View attachment "config-4.0.0-rc1-00003-g1238733" of type "text/plain" (128991 bytes)

View attachment "dmesg" of type "text/plain" (59648 bytes)

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