[PATCH v2 1/2] spapr: Add associativity reference point count to machine info

[Reza Arbab <arbab@linux.ibm.com>]

Make the number of NUMA associativity reference points a
machine-specific value, using the currently assumed default (two
reference points). This preps the next patch to conditionally change it.

Signed-off-by: Reza Arbab <arbab@linux.ibm.com>
---
 hw/ppc/spapr.c         | 6 +++++-
 include/hw/ppc/spapr.h | 1 +
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index c18eab0a2305..88b4a1f17716 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -889,10 +889,12 @@ static int spapr_dt_rng(void *fdt)
 static void spapr_dt_rtas(SpaprMachineState *spapr, void *fdt)
 {
     MachineState *ms = MACHINE(spapr);
+    SpaprMachineClass *smc = SPAPR_MACHINE_GET_CLASS(ms);
     int rtas;
     GString *hypertas = g_string_sized_new(256);
     GString *qemu_hypertas = g_string_sized_new(256);
     uint32_t refpoints[] = { cpu_to_be32(0x4), cpu_to_be32(0x4) };
+    uint32_t nr_refpoints;
     uint64_t max_device_addr = MACHINE(spapr)->device_memory->base +
         memory_region_size(&MACHINE(spapr)->device_memory->mr);
     uint32_t lrdr_capacity[] = {
@@ -944,8 +946,9 @@ static void spapr_dt_rtas(SpaprMachineState *spapr, void *fdt)
                      qemu_hypertas->str, qemu_hypertas->len));
     g_string_free(qemu_hypertas, TRUE);
 
+    nr_refpoints = MIN(smc->nr_assoc_refpoints, ARRAY_SIZE(refpoints));
     _FDT(fdt_setprop(fdt, rtas, "ibm,associativity-reference-points",
-                     refpoints, sizeof(refpoints)));
+                     refpoints, nr_refpoints * sizeof(uint32_t)));
 
     _FDT(fdt_setprop(fdt, rtas, "ibm,max-associativity-domains",
                      maxdomains, sizeof(maxdomains)));
@@ -4541,6 +4544,7 @@ static void spapr_machine_class_init(ObjectClass *oc, void *data)
     smc->linux_pci_probe = true;
     smc->smp_threads_vsmt = true;
     smc->nr_xirqs = SPAPR_NR_XIRQS;
+    smc->nr_assoc_refpoints = 2;
     xfc->match_nvt = spapr_match_nvt;
 }
 
diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h
index e579eaf28c05..abaf9a92adc0 100644
--- a/include/hw/ppc/spapr.h
+++ b/include/hw/ppc/spapr.h
@@ -129,6 +129,7 @@ struct SpaprMachineClass {
     bool linux_pci_probe;
     bool smp_threads_vsmt; /* set VSMT to smp_threads by default */
     hwaddr rma_limit;          /* clamp the RMA to this size */
+    uint32_t nr_assoc_refpoints;
 
     void (*phb_placement)(SpaprMachineState *spapr, uint32_t index,
                           uint64_t *buid, hwaddr *pio, 
-- 
2.18.2