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Re: [Qemu-ppc] [PATCH] ppc/pnv: Generate phandle for the "interrupt-pare
From: |
David Gibson |
Subject: |
Re: [Qemu-ppc] [PATCH] ppc/pnv: Generate phandle for the "interrupt-parent" property |
Date: |
Wed, 24 Jul 2019 18:57:30 +1000 |
User-agent: |
Mutt/1.12.0 (2019-05-25) |
On Wed, Jul 24, 2019 at 09:11:54AM +0200, Cédric Le Goater wrote:
> On 24/07/2019 05:23, David Gibson wrote:
> > On Tue, Jul 23, 2019 at 11:01:38AM +0200, Cédric Le Goater wrote:
> >> Devices such as the BT or serial devices require a valid
> >> "interrupt-parent" phandle in the device tree and it is currently
> >> empty (0x0). It was not a problem until now but since OpenFirmare
> >> started using a recent libdft (>= 1.4.7), petitboot fails to boot the
> >> system image with error :
> >>
> >> dtc_resize: fdt_open_into returned FDT_ERR_BADMAGIC
> >>
> >> Provide a phandle for the LPC bus.
> >>
> >> Suggested-by: Greg Kurz <address@hidden>
> >> Signed-off-by: Cédric Le Goater <address@hidden>
> >
> > I've applied this, since it looks to be correct.
> >
> > But.. can you connect the dots for me in how this being missing
> > results in a BADMAGIC error??
>
> Some binary called by petitboot segfaults when trying to kexec an image on
> a system with a bogus DT (generated by QEMU). I don't know exactly which one
> as I only see the error message above and the segv message in dmesg
Ok, I'm still not seeing how that gets you to a BADMAGIC error.
>
> I didn't notice before because I was using an old open-power-v2.1 image. I
> have
> switched to more recent ones now :
>
>
> https://openpower.xyz/job/openpower/job/openpower-op-build/label=slave,target=witherspoon/lastSuccessfulBuild/
>
> https://openpower.xyz/job/openpower/job/openpower-op-build/label=slave,target=palmetto/lastSuccessfulBuild/
>
> Btw, where could we keep some images of reference ? I have a couple of
> patches
> which enables the QEMU PowerNV machine to boot directly from the PNOR using :
>
> -drive file=./witherspoon.pnor,format=raw,if=mtd
>
> Thanks,
>
> C.
>
> >
> >> ---
> >> hw/ppc/pnv.c | 5 +++++
> >> 1 file changed, 5 insertions(+)
> >>
> >> diff --git a/hw/ppc/pnv.c b/hw/ppc/pnv.c
> >> index 36f57479a1f5..2deceecdccb5 100644
> >> --- a/hw/ppc/pnv.c
> >> +++ b/hw/ppc/pnv.c
> >> @@ -431,9 +431,14 @@ static void pnv_dt_isa(PnvMachineState *pnv, void
> >> *fdt)
> >> .fdt = fdt,
> >> .offset = isa_offset,
> >> };
> >> + uint32_t phandle;
> >>
> >> _FDT((fdt_setprop(fdt, isa_offset, "primary", NULL, 0)));
> >>
> >> + phandle = qemu_fdt_alloc_phandle(fdt);
> >> + assert(phandle > 0);
> >> + _FDT((fdt_setprop_cell(fdt, isa_offset, "phandle", phandle)));
> >> +
> >> /* ISA devices are not necessarily parented to the ISA bus so we
> >> * can not use object_child_foreach() */
> >> qbus_walk_children(BUS(pnv->isa_bus), pnv_dt_isa_device, NULL, NULL,
> >> NULL,
> >
>
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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