On Wed, Oct 02, 2019 at 02:22:49PM -0700, Brian Woods wrote:
> On Wed, Oct 02, 2019 at 08:59:28PM +0100, Julien Grall wrote:
> > Hi,
> >
> > On 10/2/19 7:56 PM, Brian Woods wrote:
> >
> > Hmmm, the first e-mail didn't land in my inbox directly (I have a filter
> > send to a separate directory any e-mail I not CCed on). Did you BCC me by
> > any change?
> That's odd. I know I copied your and Stefano's email addresses from the
> MAINTAINERS file but under my sent emails it shows it has having no
> CCs... PEBCAK I guess. My apologies.
> >
> > Let see try to troubleshoot it first :).
> >
> > Well, any attachment you send on the ML will store to each subscribers
> > mailbox. I let you do the math here ;)
> >
> > So yeah, pastebin is always the preferred way when you have to send the full
> > log.
> >
> > Thank you for the log. So that's probably not a double-init then.
> >
> > Looking back at the log, the values look quite sane. So I am not entirely
> > sure what is happening.
> >
> > I would check that the frametable is correctly zeroed. You could add a print
> > at the end of setup_frametable_mappings(...) to dump the count_info for the
> > page. Something like:
> > mfn_to_page(_mfn(0x01533))->count_info;
> >
> > If it is correctly initialized, it should be zero.
> >
> > The next step would be to add a similar print in start_xen()
> > (xen/arch/arm/setup.c) and see where the value is not 0 anymore.
> >
> > Cheers,
> >
> > --
> > Julien Grall
>
> I'll go ahead add those and see if that leads to anything.
>
> --
> Brian Woods
Ok, I added:
printk("BW_DEBUG: 01 count_info=0x%016lx\n",
mfn_to_page(_mfn(0x01533))->count_info);
In some places. I'm not sure about some of the earlier ones (the ones
before the UART is set up), but all of the ones afterwards that
actually get output are:
BW_DEBUG: 11 count_info=0x0180000000000000
Is it worth trying to figure out where the printk buffer is and reading
it really early on?
--
Brian Woods
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel
