[Qemu-devel] [PATCH v3 5/6] spapr: Add a helper for node0_size calculation

[Alexey Kardashevskiy <aik@ozlabs.ru>]

In multiple places there is a node0_size variable calculation
which assumes that NUMA node #0 and memory node #0 are the same
things which they are not. Since we are going to change it and
do not want to change it in multiple places, let's make a helper.

This adds a spapr_node0_size() helper and makes use of it.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
---
Changes:
v3:
* fixed bug when QEMU is started with RAM size
bigger that the only NUMA node like this:
 -m 8192 -smp 4 -numa node,nodeid=0,cpus=0-3,mem=4096

v2:
* removed duplicated "return ram_size" from spapr_node0_size()
---
 hw/ppc/spapr.c | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 680d7f9..c71ce1f 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -282,6 +282,19 @@ static size_t create_page_sizes_prop(CPUPPCState *env, uint32_t *prop,
     return (p - prop) * sizeof(uint32_t);
 }
 
+static hwaddr spapr_node0_size(void)
+{
+    if (nb_numa_nodes) {
+        int i;
+        for (i = 0; i < nb_numa_nodes; ++i) {
+            if (numa_info[i].node_mem) {
+                return MIN(pow2floor(numa_info[i].node_mem), ram_size);
+            }
+        }
+    }
+    return ram_size;
+}
+
 #define _FDT(exp) \
     do { \
         int ret = (exp);                                           \
@@ -803,9 +816,8 @@ static void spapr_reset_htab(sPAPREnvironment *spapr)
 
     /* Update the RMA size if necessary */
     if (spapr->vrma_adjust) {
-        hwaddr node0_size = (nb_numa_nodes > 1) ?
-            numa_info[0].node_mem : ram_size;
-        spapr->rma_size = kvmppc_rma_size(node0_size, spapr->htab_shift);
+        spapr->rma_size = kvmppc_rma_size(spapr_node0_size(),
+                                          spapr->htab_shift);
     }
 }
 
@@ -1236,7 +1248,7 @@ static void ppc_spapr_init(MachineState *machine)
     MemoryRegion *sysmem = get_system_memory();
     MemoryRegion *ram = g_new(MemoryRegion, 1);
     hwaddr rma_alloc_size;
-    hwaddr node0_size = (nb_numa_nodes > 1) ? numa_info[0].node_mem : ram_size;
+    hwaddr node0_size = spapr_node0_size();
     uint32_t initrd_base = 0;
     long kernel_size = 0, initrd_size = 0;
     long load_limit, rtas_limit, fw_size;
-- 
2.0.0