Re: [Xen-devel] Arm boot regression with Xen 4.12

[Julien Grall <julien.grall@xxxxxxx>]

On 17/04/2019 09:02, Amit Tomer wrote:
> Hello,
Hi,

> On Fri, Mar 22, 2019 at 5:05 PM Amit Tomer <amittomer25@xxxxxxxxx> wrote:
> > Hi,
> >
> >
> > > I am wondering if you had time to bisect the issue?
> > >
> > > We are releasing Xen 4.12 soon so we need to make the decision whether this
> > > should be fixed after (and backport it) or before.
> Don't see this crash if I chose to have different load addresses(Load
> kernel at 2 MB aligned address).
> For instance, using
>
> "setenv xen_addr_r 0x40480000 ;setenv fdt_addr_r 0x43000000;setenv
> kernel_addr_r 0x41000000"
>   instead of
> "setenv xen_addr_r 0x42000000 ;setenv fdt_addr_r 0x43000000;setenv
> kernel_addr_r 0x40480000"
Glad to hear that you manage to boot Xen with a different load address. I would 
still like to understand what is the exact issue as this may be a bug in Xen.
On IRC, you mention the offending commit is f60658c6ae "xen/arm: Stop relocating 
Xen". You also pointed out that init_heap_pages was call with a NULL page.
Did you find out why it is NULL? What was the MFN looked up?

Cheers,

--
Julien Grall

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