[Arm-dev] Kernel problems on APM X-Gene

Fri Jan 26 15:07:03 UTC 2018

Jeremy,

Edit the grub command line and remove both or one of console= or earlycon=
below

console=ttyS0,115200 earlycon=uart8250,mmio32,0x1c020000

to see if proceeds any further.

-Phong

-----Original Message-----
From: Arm-dev [mailto:arm-dev-bounces at centos.org] On Behalf Of Jeremiah
Rothschild
Sent: Friday, January 26, 2018 5:04 PM
To: Conversations around CentOS on ARM hardware
Subject: Re: [Arm-dev] Kernel problems on APM X-Gene

On Fri, Jan 26, 2018 at 04:48:24PM +0700, Phong Vo wrote:
> Jeremy,

Hi Phong. Thanks for the reply! Also, thank you for the tools &
instructions to flash the Tianocore. That process worked great. :)

> Is this on which board?

Gigabyte MP30-AR0 (uart0).

> Unless you provide a log file, it is difficult to tell,

Understood. I have attached boot.log to this message. After this point, it
freezes/hangs.

> but latest CentOS 7.4 (kernel 4.11) boots fine on X-Gene platforms.
>
> I am not sure how you built kernel, but this is what you can check. To
> boot X-Gene using acpi, you need to enable
> CONFIG_ARM64_ACPI_PARKING_PROTOCOL=y. CentOS (RPM) default
> configuration should already have this enabled.

Interesting. It is enabled in the failing kernel:

[root at hammer ~]# grep CONFIG_ARM64_ACPI_PARKING_PROTOCOL
/boot/config-4.11.0-45.el7.aarch64
CONFIG_ARM64_ACPI_PARKING_PROTOCOL=y

but it is not enabled in the working kernel that Gordan built for me:

[root at hammer ~]# grep CONFIG_ARM64_ACPI_PARKING_PROTOCOL
/boot/config-4.9.60-1.el7.centos.aarch64
[root at hammer ]#

> -Phong
>
> +-----Original Message-----
> +From: Arm-dev [mailto:arm-dev-bounces at centos.org] On Behalf Of
> +Jeremiah Rothschild
> +Sent: Friday, January 26, 2018 4:35 PM
> +To: Conversations around CentOS on ARM hardware
> +Subject: Re: [Arm-dev] Kernel problems on APM X-Gene
> +
> +On Sat, Nov 04, 2017 at 05:37:54PM +0000, Gordan Bobic wrote:
> +> Apologies for taking so long to return to this thread, it took way
> +> longer than expected to get to the machine and get it up and
> +> running
> +again.
> +
> +Thanks for the update & apologies as well on my delayed follow-up.
> +
> +Last time I wrote the mailing list about my kernel problems, I was
> +told (by jperrin at centos.org) that my system was not in a supported
> +state because I was daisy-chaining Tianocore EFI via U-Boot. I was
> +directed to flash the Tianocore firmware and remove U-Boot from the
equation.
> +Although I was skeptical of this answer, I finally was able to do this.
> +
> +Unfortunately, however, this does not change behavior. I still cannot
> +successfully boot into any kernels beyond 4.5 unless I use 'acpi=off'.
> +
> +I am, interestingly enough, able to run the 4.9.60 kernel that you
> +supplied.
> +
> +So:
> +
> +(1) My experience leads me to believe that it is still a possibility
> +that a kernel related bug exists.
> +
> +(2) I am confused as to why your kernel worked. I built kernel-alt-
> +4.11.0-22.el7a from source and it fails like the others. Were there
> +any special steps you took in building the rpm's you supplied me?
> +
> +(3) Is it true that you are able to boot into the (> 4.5) distro-
> +supplied kernels? Or have you only tried/succeeded with your custom
> +builds?
> +
> +Thanks again!
> +
> +j
> +
> +> I also just updated the build to the latest 4.9.60.
> +>
> +> Here is a download link to both binaries and src.rpm (download the
> +> kernel tarball from kernel.org manually to build from src.rpm):
> +> http://ftp.redsleeve.org/pub/misc/kernel/aarch64/RPMS/
> +> http://ftp.redsleeve.org/pub/misc/kernel/aarch64/SRPMS/
> +>
> +> To recap - I am also running with Tianocore EFI chain-loaded from
> +> u-boot, and mainling 4.9.x boots just fine on it.
> +>
> +> No need for disabling ACPI on the kernel command line, no need to
> +> run EFI firmware as a 1st stage boot loader, it just works.
> +> Do feel free to try it - if that works for you but the distro
> +> supplied 4.5.x kernel doesn't, it seems reasonably conclusive that
> +> it is the CentOS kernel that is broken for this board.
> +>
> +> I'd also be interested in learning whether you have any luck
> +> getting PCIe cards to work with it without problems - I haven't
> +> tried it since upgrading to 4.9.x, but certainly on 4.4.x mainline
> +> the machine used to reliably lock up as soon as the driver for the
PCIe card loads.
> +>
> +> Gordan
> +>
> +>
> +> On Fri, Sep 22, 2017 at 12:06 PM, Jeremiah Rothschild
> +> <jeremiah at franz.com>
> +> wrote:
> +>
> +> > On Fri, Sep 22, 2017 at 11:59:00AM +0100, Gordan Bobic wrote:
> +> > > On Fri, Sep 22, 2017 at 11:54 AM, Jeremiah Rothschild <
> +> > jeremiah at franz.com>
> +> > > wrote:
> +> > >
> +> > > > On Fri, Sep 22, 2017 at 11:39:19AM +0100, Gordan Bobic wrote:
> +> > > > > If you are interested, I'm more than happy to share my
> +> > > > > src.rpm for
> +> > 4.9.x,
> +> > > > > but won't be able to get to it before tomorrow morning as
> +> > > > > the
> +> > machine was
> +> > > > > recently mothballed.
> +> > > >
> +> > > > Thanks. I actually need to test with as new of a version as I
> +> > > > can
> +> > because I
> +> > > > have been experiencing an occasional "page allocation failure"
> +> > > > kernel panic.
> +> > > > No idea if/when that was fixed but I figure the newest
> +> > > > version is my
> +> > best
> +> > > > hope.
> +> > > >
> +> > >
> +> > > I've been on my own 4.9.x more or less since I got the machine,
> +> > > it was in
> +> > > 24/7 use, and I never experienced that issue. So it may be
> +> > > worth a cross-check with the kernel that I'm running to see
> +> > > whether the fault follows your machine or whether it is kernel
dependent.
> +> >
> +> > You're right. It would be a good extra data point. Feel free to
> +> > mail me directly once you're sorted and I'll gladly check out
> +> > your 4.9
> +build.
> +> > Thanks
> +> > again!
> +> >
> +> >
> +> >
> +> > > _______________________________________________
> +> > > Arm-dev mailing list
> +> > > Arm-dev at centos.org
> +> > > https://lists.centos.org/mailman/listinfo/arm-dev
> +> >
> +> > _______________________________________________
> +> > Arm-dev mailing list
> +> > Arm-dev at centos.org
> +> > https://lists.centos.org/mailman/listinfo/arm-dev
> +> >
> +
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