Re: [Qemu-devel] [PATCH] spapr_events: drop bogus cell from "interrupt-ranges" property

[David Gibson]

On Wed, Dec 06, 2017 at 09:16:52AM +0100, Greg Kurz wrote:
1;5002;0c> According to LoPAPR 1.1 B.6.12, the "/event-sources" node has an 
"interrupt-
> ranges" property, the format of which is described in B.6.9.1.2 as follows:
> 
> “interrupt-ranges”
>  Standard property name that defines the interrupt number(s) and range(s)
>  handled by this unit.
> 
>  prop-encoded-array: List of (int-number, range) specifications.
> 
>  Int-number is encoded as with encode-int.
>  Range is encoded as with encode-int.
> 
>  The first entry in this list shall contain the int-number associated with
>  the first “reg” property entry. The int-num-ber is the value representing
>  the interrupt source as would appear in the PowerPC External Interrupt
>  Architecture XISR. The range shall be the number of sequential interrupt
>  numbers which this unit can generate.
> 
> There's no such thing as a cell count at the end of the array, like the
> one introduced by commit ffbb1705a33d in QEMU 2.8. It doesn't seem it had
> any impact on existing guests and I couldn't find any related workaround
> in linux. So, let's just drop the bogus lines.
> 
> Signed-off-by: Greg Kurz <address@hidden>

That does indeed seem bogus.  Applied to ppc-for-2.12.

> ---
>  hw/ppc/spapr_events.c |    3 ---
>  1 file changed, 3 deletions(-)
> 
> diff --git a/hw/ppc/spapr_events.c b/hw/ppc/spapr_events.c
> index c7a64e6b8dd3..86836f0626dc 100644
> --- a/hw/ppc/spapr_events.c
> +++ b/hw/ppc/spapr_events.c
> @@ -292,9 +292,6 @@ void spapr_dt_events(sPAPRMachineState *spapr, void *fdt)
>          irq_ranges[count++] = cpu_to_be32(1);
>      }
>  
> -    irq_ranges[count] = cpu_to_be32(count);
> -    count++;
> -
>      _FDT((fdt_setprop(fdt, event_sources, "interrupt-controller", NULL, 0)));
>      _FDT((fdt_setprop_cell(fdt, event_sources, "#interrupt-cells", 2)));
>      _FDT((fdt_setprop(fdt, event_sources, "interrupt-ranges",
> 

-- 
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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