[Qemu-ppc] [PATCH for 2.13] spapr: Correct max associativity domains value for non-NUMA configs

[Serhii Popovych]

In non-NUMA configurations nb_numa_nodes is zero and we set 5th cell
in ibm,max-associativity-domains to -1. That causes to stall Linux
guests during boot after following line:

[    0.000000] NUMA associativity depth for CPU/Memory: 4

Make last possible NUMA in property zero to correct support for
non-NUMA guests.

Fixes: c1df49a670ef ("spapr: Add ibm,max-associativity-domains property")
Signed-off-by: Serhii Popovych <address@hidden>
---
 hw/ppc/spapr.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 7b2bc4e..bff2125 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -914,7 +914,7 @@ static void spapr_dt_rtas(sPAPRMachineState *spapr, void 
*fdt)
         cpu_to_be32(0),
         cpu_to_be32(0),
         cpu_to_be32(0),
-        cpu_to_be32(nb_numa_nodes - 1),
+        cpu_to_be32(nb_numa_nodes ? nb_numa_nodes - 1 : 0),
     };
 
     _FDT(rtas = fdt_add_subnode(fdt, 0, "rtas"));
-- 
1.8.3.1