Failure to boot G4: dt_headr_start=0x01501000

[Mathieu Malaterre]

On Thu, May 23, 2019 at 11:45 AM Christophe Leroy
<christophe.leroy at c-s.fr> wrote:
>
>
>
> Le 23/05/2019 à 10:53, Mathieu Malaterre a écrit :
> > On Thu, May 23, 2019 at 10:29 AM Mathieu Malaterre <malat at debian.org> wrote:
> >>
> >> On Thu, May 23, 2019 at 8:39 AM Christophe Leroy
> >> <christophe.leroy at c-s.fr> wrote:
> >>>
> >>> Salut Mathieu,
> >>>
> >>> Le 23/05/2019 à 08:24, Mathieu Malaterre a écrit :
> >>>> Salut Christophe,
> >>>>
> >>>> On Wed, May 22, 2019 at 2:20 PM Christophe Leroy
> >>>> <christophe.leroy at c-s.fr> wrote:
> >>>>>
> >>>>>
> >>>>>
> >>>>> Le 22/05/2019 à 14:15, Mathieu Malaterre a écrit :
> >>>>>> Hi all,
> >>>>>>
> >>>>>> I have not boot my G4 in a while, today using master here is what I see:
> >>>>>>
> >>>>>> done
> >>>>>> Setting btext !
> >>>>>> W=640 H=488 LB=768 addr=0x9c008000
> >>>>>> copying OF device tree...
> >>>>>> starting device tree allocs at 01401000
> >>>>>> otloc_up(00100000, 0013d948)
> >>>>>>      trying: 0x01401000
> >>>>>>      trying: 0x01501000
> >>>>>>     -› 01501000
> >>>>>>      alloc_bottom : 01601000
> >>>>>>      alloc_top    : 20000000
> >>>>>>      alloc_top_hi : 20000000
> >>>>>>      nmo_top      : 20000000
> >>>>>>      ram_top      : 20000000
> >>>>>> Building dt strings...
> >>>>>> Building dt structure...
> >>>>>> reserved memory map:
> >>>>>>      00d40000 - 006c1000
> >>>>>> Device tree strings 0x01502000 -> 0x00000007
> >>>>>> Device tree struct 0x01503000 -> 0x00000007
> >>>>>> Quiescing Open Firmware ...
> >>>>>> Booting Linux via __start() @ 0x001400000
> >>>>>> ->dt_headr_start=0x01501000
> >>>>>>
> >>>>>> Any suggestions before I start a bisect ?
> >>>>>>
> >>>>>
> >>>>> Have you tried without CONFIG_PPC_KUEP and CONFIG_PPC_KUAP ?
> >>>>
> >>>> Using locally:
> >>>>
> >>>> diff --git a/arch/powerpc/configs/g4_defconfig
> >>>> b/arch/powerpc/configs/g4_defconfig
> >>>> index 14d0376f637d..916bce8ce9c3 100644
> >>>> --- a/arch/powerpc/configs/g4_defconfig
> >>>> +++ b/arch/powerpc/configs/g4_defconfig
> >>>> @@ -32,6 +32,8 @@ CONFIG_USERFAULTFD=y
> >>>>    # CONFIG_COMPAT_BRK is not set
> >>>>    CONFIG_PROFILING=y
> >>>>    CONFIG_G4_CPU=y
> >>>> +# CONFIG_PPC_KUEP is not set
> >>>> +# CONFIG_PPC_KUAP is not set
> >>>>    CONFIG_PANIC_TIMEOUT=0
> >>>>    # CONFIG_PPC_CHRP is not set
> >>>>    CONFIG_CPU_FREQ=y
> >>>>
> >>>>
> >>>> Leads to almost the same error (some values have changed):
> >>>
> >>> Ok.
> >>>
> >>> When you say you are using 'master', what do you mean ? Can you give the
> >>> commit Id ?
> >>>
> >>> Does it boots with Kernel 5.1.4 ?
> >>
> >> I was able to boot v5.1:
> >>
> >> $ dmesg | head
> >> [    0.000000] printk: bootconsole [udbg0] enabled
> >> [    0.000000] Total memory = 512MB; using 1024kB for hash table (at (ptrval))
> >> [    0.000000] Linux version 5.1.0+ (malat at debian.org) (gcc version
> >> 8.3.0 (Debian 8.3.0-7)) #8 Thu May 23 06:26:38 UTC 2019
> >>
> >> Commit id is:
> >>
> >> e93c9c99a629 (tag: v5.1) Linux 5.1
> >>
> >>> Did you try latest powerpc/merge branch ?
> >>
> >> Will try that next.
> >
> > I confirm powerpc/merge does not boot for me (same config). Commit id:
> >
> > a27eaa62326d (powerpc/merge) Automatic merge of branches 'master',
> > 'next' and 'fixes' into merge
>
> I see in the config you sent me that you have selected CONFIG_KASAN,
> which is a big new stuff.
>
> Can you try without it ?

With same config but CONFIG_KASAN=n (on top of a27eaa62326d), I can
reproduce the boot failure (no change).

Time for bisect ?

> Christophe
>
> >
> >
> >>> Can you send your full .config ?
> >>
> >> Config is attached.
> >>
> >> Thanks,
> >>
> >>> Christophe
> >>>
> >>>>
> >>>> done
> >>>> Setting btext !
> >>>> W=640 H=488 LB=768 addr=0x9c008000
> >>>> copying OF device tree...
> >>>> starting device tree allocs at 01300000
> >>>> alloc_up(00100000, 0013d948)
> >>>>     trying: 0x01300000
> >>>>     trying: 0x01400000
> >>>>    -› 01400000
> >>>>     alloc_bottom : 01500000
> >>>>     alloc_top    : 20000000
> >>>>     alloc_top_hi : 20000000
> >>>>     nmo_top      : 20000000
> >>>>     ram_top      : 20000000
> >>>> Building dt strings...
> >>>> Building dt structure...
> >>>> reserved memory map:
> >>>>     00c40000 - 006c0000
> >>>> Device tree strings 0x01401000 -> 0x00000007
> >>>> Device tree struct 0x01402000 -> 0x00000007
> >>>> Quiescing Open Firmware ...
> >>>> Booting Linux via __start() @ 0x001400000
> >>>> ->dt_headr_start=0x01400000
> >>>>
> >>>> Thanks anyway,
> >>>>