Re: Booting UEFI ZFS is broken on arm64

On Wed, Nov 29, 2017 at 5:43 PM, Shawn Webb <shawn.webb_at_hardenedbsd.org>
wrote:

> On Wed, Nov 29, 2017 at 05:42:52PM -0700, Warner Losh wrote:
> > On Wed, Nov 29, 2017 at 5:34 PM, Shawn Webb <shawn.webb_at_hardenedbsd.org>
> > wrote:
> >
> > > On Wed, Nov 29, 2017 at 05:33:46PM -0700, Warner Losh wrote:
> > > > On Wed, Nov 29, 2017 at 5:21 PM, Shawn Webb <
> shawn.webb_at_hardenedbsd.org>
> > > > wrote:
> > > >
> > > > > It appears that in the latest FreeBSD 12-CURRENT/arm64 snapshot,
> > > > > booting UEFI GPT ZFS on my OverDrive 1000 is broken. It boots up to
> > > > > this line:
> > > > >
> > > > > Using DTB provided by EFI at 0x801fe00000.
> > > >
> > > >
> > > > Which snapshot is that? Boot1 was broken until recently.
> > >
> > > FreeBSD-12.0-CURRENT-arm64-aarch64-20171121-r326056-memstick.img
> > >
> > > It also happens on latest HEAD, so it would appear to still be broken.
> >
> >
> > Is this boot1.efi producing the output, or loader.efi? I'm guessing the
> > latter, but wanted to make sure. If so, then we're past the point where
> > boot1.efi would have failed (besides, it was fixed before that snapshot).
>
> With DEBUG turned on for stand/fdt:
>
> Booting [/boot/kernel/kernel]...
> fdt_copy(): fdt_copy va 0x01208000
> fdt_setup_fdtp(): fdt_setup_fdtp()
> fdt_load_dtb_addr(): fdt_load_dtb_addr(0x801fe00000)
> Using DTB provided by EFI at 0x801fe00000.
> Loaded the platform dtb: 0x81f56f1630.
> fdt_fixup(): fdt_fixup()
>
> ^ hangs after that message


That doesn't sound like anything I've changed, but it could well be... I
think to find this breakage, you may need to bisect backwards along stand /
sys/boot until we find the spot where it broke.

Warner