linux-kernel - pcieport bug?

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-Id: <TY1EHR.8720BA9PHAKY2@att.net>
Date:   Mon, 29 Aug 2022 13:59:17 -0400
From:   Steven J Abner <pheonix.sja@....net>
To:     linux-kernel@...r.kernel.org
Subject: pcieport bug?

Hi
Building a kernel tailored for AMD 2400g on ASRock B450 using 5.18.12 
as base, OS
is Elementary 6.1 on top of Ubuntu 20.04.5.
In a config I changed some which lead to this query,'cause not sure 
what it means.
So up to you see if it is of concern. Notation igpu# refers to build 
sequence tests.
Also note that pcieport may affect other drivers?

config differences
igpu33
# CONFIG_PCIEPORTBUS is not set
# CONFIG_PCI_IOV is not set
# CONFIG_VGA_ARB is not set
# CONFIG_HOTPLUG_PCI is not set
igpu32
CONFIG_PCIEPORTBUS=y
CONFIG_HOTPLUG_PCI_PCIE=y
CONFIG_PCIEAER=y
# CONFIG_PCIEAER_INJECT is not set
# CONFIG_PCIE_ECRC is not set
CONFIG_PCIE_PME=y
CONFIG_PCIE_DPC=y
# CONFIG_PCIE_EDR is not set
CONFIG_PCI_REALLOC_ENABLE_AUTO=y
# CONFIG_PCI_PF_STUB is not set
CONFIG_PCI_IOV=y
CONFIG_VGA_ARB=y
CONFIG_VGA_ARB_MAX_GPUS=16
CONFIG_HOTPLUG_PCI=y
CONFIG_HOTPLUG_PCI_ACPI=y
# CONFIG_HOTPLUG_PCI_ACPI_IBM is not set
CONFIG_HOTPLUG_PCI_CPCI=y
# CONFIG_HOTPLUG_PCI_CPCI_ZT5550 is not set
# CONFIG_HOTPLUG_PCI_CPCI_GENERIC is not set
CONFIG_HOTPLUG_PCI_SHPC=y
# CONFIG_RAPIDIO_TSI721 is not set
# CONFIG_EEEPC_LAPTOP is not set

lspci differences:
start with identical:
00:00.0 Host bridge
00:00.2 IOMMU
00:01.0 Host bridge

kernel builds after igpu33 stable flags, only irq differences
kernel builds upto igpu32 flags differ including non-pcieport drivers,
there was a few builds where flags matched out of 32 different builds
I thought was normal that flags changed prior to 33-37 being very 
stable.

under 00:01.1 PCI bridge:
igpu33
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B- DisINTx-
DevCtl: CorrErr- NonFatalErr- FatalErr- UnsupReq-
RootCtl: ErrCorrectable- ErrNon-Fatal- ErrFatal- PMEIntEna- CRSVisible+
Capabilities: [a0] MSI: Enable- Count=1/1 Maskable- 64bit+
  Address: 0000000000000000 Data: 0000
RootCmd: CERptEn- NFERptEn- FERptEn-

igpu32
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- 
Stepping- SERR- FastB2B- DisINTx+
Interrupt: pin ? routed to IRQ 26
DevCtl: CorrErr+ NonFatalErr+ FatalErr+ UnsupReq+
RootCtl: ErrCorrectable- ErrNon-Fatal- ErrFatal- PMEIntEna+ CRSVisible+
Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
  Address: 00000000fee00000 Data: 0000
RootCmd: CERptEn+ NFERptEn+ FERptEn+
Kernel driver in use: pcieport

under these, nearly same readout as above (32vs33 use of pcieport)
00:01.6 PCI bridge
00:08.1 PCI bridge
00:08.2 PCI bridge
11:01.0 PCI bridge
11:02.0 PCI bridge
15:00.2 PCI bridge
1d:00.0 PCI bridge
1d:01.0 PCI bridge
1d:04.0 PCI bridge
1d:05.0 PCI bridge
1d:06.0 PCI bridge
1d:07.0 PCI bridge

on non-pcieport drivers minor differences in +- states
on nvme added line:
Physical Slot: 0
but +- state can change like others

dmesg differences (alphabetical):
igu33
acpi PNP0A08:00: PCIe port services disabled; not requesting _OSC 
control
igpu32
acpiphp: ACPI Hot Plug PCI Controller Driver version: 0.5
acpi PNP0A08:00: _OSC: OS now controls [PCIeHotplug PME AER 
PCIeCapability]
acpi PNP0A08:00: _OSC: platform does not support [SHPCHotplug LTR]
amdgpu 0000:38:00.0: vgaarb: deactivate vga console
pci 0000:38:00.0: vgaarb: bridge control possible
pci 0000:38:00.0: vgaarb: setting as boot VGA device
pci 0000:38:00.0: vgaarb: VGA device added: 
decodes=io+mem,owns=none,locks=none
pcieport 0000:00:01.1: AER: enabled with IRQ 26
pcieport 0000:00:01.1: PME: Signaling with IRQ 26
pcieport 0000:00:01.2: AER: enabled with IRQ 27
pcieport 0000:00:01.2: PME: Signaling with IRQ 27
pcieport 0000:00:01.6: AER: enabled with IRQ 28
pcieport 0000:00:01.6: pciehp: Slot #0 AttnBtn- PwrCtrl- MRL- AttnInd- 
PwrInd- HotPlug+ Surprise- Interlock- NoCompl+ IbPresDis- LLActRep+
pcieport 0000:00:01.6: PME: Signaling with IRQ 28
pcieport 0000:00:08.1: PME: Signaling with IRQ 29
pcieport 0000:00:08.2: PME: Signaling with IRQ 30
shpchp: Standard Hot Plug PCI Controller Driver version: 0.4
vgaarb: loaded

Steve

I wish to be personally CC'ed the answers/comments posted to the list
in response to your posting, please.