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

[Marius Strobl]

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.

Marius

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