Re: [Xen-devel] Panic on Seattle (resend)

[Suravee Suthikulanit <suravee.suthikulpanit@xxxxxxx>]

On 9/30/2014 10:22 AM, Julien Grall wrote:
> Hi Suravee,
>
> On 30/09/2014 15:57, Suravee Suthikulpanit wrote:
> > > > I have not tracked down to a particular commit ID. But do you guys see
> > > > anything suspicious with the error message?
> > > The elf_init thing is suspicious, it suggests Xen hasn't properly
> > > figured out the type of your kernel image. Is it a regular bare arm64
> > > Image (from arch/arm64/boot/Image)? You can't boot the vmlinux from the
> > > top level directly (AFAIK).
> > Actually, I bisect it down to this commit ID causing it to break:
> >
> > commit 73b9bdfd2adab8ed0cea91d3e4470b0d1bf76591
> > Author: Vijaya Kumar K <Vijaya.Kumar@xxxxxxxxxxxxxxxxxx>
> > Date:   Fri Sep 12 16:39:46 2014 +0530
> >
> >      xen/arm: Add virtual GICv3 support
> >
> > I am not sure at this point why. Here is the full Xen log.
> >
> > Loading Xen image..
> > - UART enabled -
> > - CPU 00000000 booting -
> > - Current EL 00000008 -
> > - Xen starting at EL2 -
> > - Zero BSS -
> > - Setting up control registers -
> > - Turning on paging -
> > - Ready -
> > (XEN) Checking for initrd in /chosen
> > (XEN) RAM: 0000008000000000 - 00000083ffffffff
> > (XEN)
> > (XEN) MODULE[0]: 000000801fffe000 - 000000801ffffc7d Device Tree
> > (XEN) MODULE[1]: 0000008008800000 - 0000008009100890 Kernel
> [..]
>
> > (XEN) Placing Xen at 0x00000083ffe00000-0x0000008400000000
> > (XEN) Update BOOTMOD_XEN from 0000008008700000-0000008008802d81 =>
> > 00000083ffe00000-00000083fff02d81
> It looks like Xen is overlapping the beginning of the kernel in the memory.
>
> Xen: 0000008008700000-0000008008802d81
> Kernel: 0000008008800000 - 0000008009100890
>
> Can you try to load Xen in another place in the memory?
>
> Regards,
(XEN) Checking for initrd in /chosen
(XEN) RAM: 0000008000000000 - 00000083ffffffff
(XEN)
(XEN) MODULE[0]: 000000801fffe000 - 000000801ffffc7d Device Tree
(XEN) MODULE[1]: 0000008008800000 - 0000008009100890 Kernel
(XEN)
(XEN) Command line: console=dtuart dtuart=serial0 noreboot sync_console
(XEN) Placing Xen at 0x00000083ffe00000-0x0000008400000000
(XEN) Update BOOTMOD_XEN from 0000008008600000-0000008008702d81 => 
00000083ffe00000-00000083fff02d81
Yes, this now fixed once making sure Xen is loaded at least 2MB away 
from Image.
Thanks,

Suravee


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