r276200: EFI boot failure: kernel stops booting at pci0: <ACPI PCI bus> on pcib0

[Marius Strobl]

On Mon, Dec 29, 2014 at 08:12:42PM +0100, Marius Strobl wrote:
> On Mon, Dec 29, 2014 at 05:55:28PM +0100, Roger Pau Monné wrote:
> > El 29/12/14 a les 12.41, Roger Pau Monné ha escrit:
> > > Hello,
> > > 
> > > Sorry for not noticing this earlier, I've been without a computer for
> > > some days. Do you get a panic message, or the system just freezes?
> > > 
> > > Can you please post the full boot output with boot_verbose enabled?
> > 
> > I'm not able to reproduce the problem with Qemu and OVMF, and I don't
> > have any box right now that uses UEFI.
> > 
> > I'm guessing that this is due to some memory reservation conflict, so
> > I'm attaching a patch that should help diagnose it.
> 
> You'll probably want to nuke RF_ACTIVE so the resources are marked
> as taken but in case of vt_efifb(4), the memory isn't mapped twice.
> I don't not know whether the latter actually is a problem for x86,
> though, it'll likely at least replace the VM_MEMATTR_WRITE_COMBINING
> mapping done in vt_efifb_remap(). Removing RF_ACTIVE in turn might
> not be sufficient for the Xen bits to mark the resource as reserved,
> this should be fixed in the FreeBSD/Xen code then, however.
> Also end = size - 1, see the attached patch.

Err, end = start + size - 1 that is.

Marius