On 20/10, Bjorn Helgaas wrote:
> On Tue, Oct 05, 2021 at 10:48:08PM +0530, Naveen Naidu wrote:
> > Currently, we do not print the "id" field in the AER error logs. Yet the
> > aer_agent_string[] has the word "id" in it. The AER error log looks
> > like:
> >
> > pcieport 0000:00:03.0: PCIe Bus Error: severity=Corrected, type=Data Link Layer, (Receiver ID)
> >
> > Without the "id" field in the error log, The aer_agent_string[]
> > (eg: "Receiver ID") does not make sense. A user reading the
> > aer_agent_string[] in the log, might inadvertently look for an "id"
> > field and not finding it might lead to confusion.
> >
> > Remove the "ID" from the aer_agent_string[].
> >
> > The following are sample dummy errors inject via aer-inject.
>
> I like this, and the problem it fixes was my fault because
> these "ID" strings should have been removed by 010caed4ccb6.
>
> If it's straightforward enough, it would be nice to have the
> aer-inject command line here in the commit log to make it easier
> for people to play with this.
>
Thank you for the review. Do you mean something like:
The following sample dummy errors are injected via aer-inject via the
following steps:
1. The steps to compile the aer-inject tool is mentioned in (Section
4. Software error inject) of the document [1]
[1]: https://www.kernel.org/doc/Documentation/PCI/pcieaer-howto.txt
Make sure to place the aer-inject executable at the home directory
of the qemu system or at any other place.
2. Emulate a PCIE architecture using qemu, A sample looks like
following:
qemu-system-x86_64 -kernel ../linux/arch/x86_64/boot/bzImage \
-initrd buildroot-build/images/rootfs.cpio.gz \
-append "console=ttyS0" \
-enable-kvm -nographic \
-M q35 \
-device pcie-root-port,bus=pcie.0,id=rp1,slot=1 \
-device pcie-pci-bridge,id=br1,bus=rp1 \
-device e1000,bus=br1,addr=8
Note that the PCIe features are available only when using the
'q35' Machine [2]
[2]: https://github.com/qemu/qemu/blob/master/docs/pcie.txt
3. Once the qemu system starts up, create a sample aer-file or use any
example aer file from [3]
[3]:
https://git.kernel.org/pub/scm/linux/kernel/git/gong.chen/aer-inject.git/tree/examples
4. Inject any aer-error using
./aer-inject aer-file
This does look a tad bit longer for a commit log so I am unsure if you
would like to have it there. If you are okay with it, I would be happy
to add it to that :)
> > Before
> > =======
> >
> > In 010caed4ccb6 ("PCI/AER: Decode Error Source Requester ID"),
> > the "id" field was removed from the AER error logs, so currently AER
> > logs look like:
> >
> > pcieport 0000:00:03.0: AER: Corrected error received: 0000:00:03:0
> > pcieport 0000:00:03.0: PCIe Bus Error: severity=Corrected, type=Data Link Layer, (Receiver ID) <--- no id field
> > pcieport 0000:00:03.0: device [1b36:000c] error status/mask=00000040/0000e000
> > pcieport 0000:00:03.0: [ 6] BadTLP
> >
> > After
> > ======
> >
> > pcieport 0000:00:03.0: AER: Corrected error received: 0000:00:03.0
> > pcieport 0000:00:03.0: PCIe Bus Error: severity=Corrected, type=Data Link Layer, (Receiver)
> > pcieport 0000:00:03.0: device [1b36:000c] error status/mask=00000040/0000e000
> > pcieport 0000:00:03.0: [ 6] BadTLP
> >
> > Signed-off-by: Naveen Naidu <naveennaidu479@xxxxxxxxx>
> > ---
> > drivers/pci/pcie/aer.c | 10 +++++-----
> > 1 file changed, 5 insertions(+), 5 deletions(-)
> >
> > diff --git a/drivers/pci/pcie/aer.c b/drivers/pci/pcie/aer.c
> > index 9784fdcf3006..241ff361b43c 100644
> > --- a/drivers/pci/pcie/aer.c
> > +++ b/drivers/pci/pcie/aer.c
> > @@ -516,10 +516,10 @@ static const char *aer_uncorrectable_error_string[] = {
> > };
> >
> > static const char *aer_agent_string[] = {
> > - "Receiver ID",
> > - "Requester ID",
> > - "Completer ID",
> > - "Transmitter ID"
> > + "Receiver",
> > + "Requester",
> > + "Completer",
> > + "Transmitter"
> > };
> >
> > #define aer_stats_dev_attr(name, stats_array, strings_array, \
> > @@ -703,7 +703,7 @@ void aer_print_error(struct pci_dev *dev, struct aer_err_info *info)
> > const char *level;
> >
> > if (!info->status) {
> > - pci_err(dev, "PCIe Bus Error: severity=%s, type=Inaccessible, (Unregistered Agent ID)\n",
> > + pci_err(dev, "PCIe Bus Error: severity=%s, type=Inaccessible, (Unregistered Agent)\n",
> > aer_error_severity_string[info->severity]);
> > goto out;
> > }
> > --
> > 2.25.1
> >
> > _______________________________________________
> > Linux-kernel-mentees mailing list
> > Linux-kernel-mentees@xxxxxxxxxxxxxxxxxxxxxxxxx
> > https://lists.linuxfoundation.org/mailman/listinfo/linux-kernel-mentees
