[PATCH 07/10] spapr: create helper to set ibm,associativity

[Daniel Henrique Barboza <danielhb413@gmail.com>]

We have several places around hw/ppc files where we use the
same code to set the ibm,associativity array. This patch
creates a helper called spapr_set_associativity() to do
that in a single place. It'll also make it saner to change
the value of ibm,associativity in the next patches.

After this patch, only 2 places are left with open code
ibm,associativity assignment:

- spapr_dt_dynamic_reconfiguration_memory()
- h_home_node_associativity() in spapr_hcall.c

The update of associativity values will be made in these places
manually later on.

Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
---
 hw/ppc/spapr.c         | 32 +++++++++++++++++++++-----------
 hw/ppc/spapr_nvdimm.c  |  8 +++-----
 hw/ppc/spapr_pci.c     |  8 +++-----
 include/hw/ppc/spapr.h |  1 +
 4 files changed, 28 insertions(+), 21 deletions(-)

diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index bc51d2db90..b80a6f6936 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -201,15 +201,27 @@ static int spapr_fixup_cpu_smt_dt(void *fdt, int offset, PowerPCCPU *cpu,
     return ret;
 }
 
+void spapr_set_associativity(uint32_t *assoc, int node_id, int cpu_index)
+{
+    uint8_t assoc_size = 0x4;
+
+    if (cpu_index >= 0) {
+        assoc_size = 0x5;
+        assoc[5] = cpu_to_be32(cpu_index);
+    }
+
+    assoc[0] = cpu_to_be32(assoc_size);
+    assoc[1] = cpu_to_be32(0x0);
+    assoc[2] = cpu_to_be32(0x0);
+    assoc[3] = cpu_to_be32(0x0);
+    assoc[4] = cpu_to_be32(node_id);
+}
+
 static int spapr_fixup_cpu_numa_dt(void *fdt, int offset, PowerPCCPU *cpu)
 {
     int index = spapr_get_vcpu_id(cpu);
-    uint32_t associativity[] = {cpu_to_be32(0x5),
-                                cpu_to_be32(0x0),
-                                cpu_to_be32(0x0),
-                                cpu_to_be32(0x0),
-                                cpu_to_be32(cpu->node_id),
-                                cpu_to_be32(index)};
+    uint32_t associativity[6];
+    spapr_set_associativity(associativity, cpu->node_id, index);
 
     /* Advertise NUMA via ibm,associativity */
     return fdt_setprop(fdt, offset, "ibm,associativity", associativity,
@@ -325,15 +337,13 @@ static void add_str(GString *s, const gchar *s1)
 static int spapr_dt_memory_node(void *fdt, int nodeid, hwaddr start,
                                 hwaddr size)
 {
-    uint32_t associativity[] = {
-        cpu_to_be32(0x4), /* length */
-        cpu_to_be32(0x0), cpu_to_be32(0x0),
-        cpu_to_be32(0x0), cpu_to_be32(nodeid)
-    };
+    uint32_t associativity[5];
     char mem_name[32];
     uint64_t mem_reg_property[2];
     int off;
 
+    spapr_set_associativity(associativity, nodeid, -1);
+
     mem_reg_property[0] = cpu_to_be64(start);
     mem_reg_property[1] = cpu_to_be64(size);
 
diff --git a/hw/ppc/spapr_nvdimm.c b/hw/ppc/spapr_nvdimm.c
index 81410aa63f..bd109bfc00 100644
--- a/hw/ppc/spapr_nvdimm.c
+++ b/hw/ppc/spapr_nvdimm.c
@@ -115,15 +115,13 @@ int spapr_dt_nvdimm(void *fdt, int parent_offset,
                                              &error_abort);
     uint64_t slot = object_property_get_uint(OBJECT(nvdimm), PC_DIMM_SLOT_PROP,
                                              &error_abort);
-    uint32_t associativity[] = {
-        cpu_to_be32(0x4), /* length */
-        cpu_to_be32(0x0), cpu_to_be32(0x0),
-        cpu_to_be32(0x0), cpu_to_be32(node)
-    };
+    uint32_t associativity[5];
     uint64_t lsize = nvdimm->label_size;
     uint64_t size = object_property_get_int(OBJECT(nvdimm), PC_DIMM_SIZE_PROP,
                                             NULL);
 
+    spapr_set_associativity(associativity, node, -1);
+
     drc = spapr_drc_by_id(TYPE_SPAPR_DRC_PMEM, slot);
     g_assert(drc);
 
diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
index 09ac58fd7f..c02ace226c 100644
--- a/hw/ppc/spapr_pci.c
+++ b/hw/ppc/spapr_pci.c
@@ -2321,11 +2321,8 @@ int spapr_dt_phb(SpaprMachineState *spapr, SpaprPhbState *phb,
         cpu_to_be32(1),
         cpu_to_be32(RTAS_IBM_RESET_PE_DMA_WINDOW)
     };
-    uint32_t associativity[] = {cpu_to_be32(0x4),
-                                cpu_to_be32(0x0),
-                                cpu_to_be32(0x0),
-                                cpu_to_be32(0x0),
-                                cpu_to_be32(phb->numa_node)};
+    uint32_t associativity[5];
+
     SpaprTceTable *tcet;
     SpaprDrc *drc;
     Error *err = NULL;
@@ -2358,6 +2355,7 @@ int spapr_dt_phb(SpaprMachineState *spapr, SpaprPhbState *phb,
 
     /* Advertise NUMA via ibm,associativity */
     if (phb->numa_node != -1) {
+        spapr_set_associativity(associativity, phb->numa_node, -1);
         _FDT(fdt_setprop(fdt, bus_off, "ibm,associativity", associativity,
                          sizeof(associativity)));
     }
diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h
index d9f1afa8b2..cd158bf95a 100644
--- a/include/hw/ppc/spapr.h
+++ b/include/hw/ppc/spapr.h
@@ -863,6 +863,7 @@ int spapr_phb_dt_populate(SpaprDrc *drc, SpaprMachineState *spapr,
 
 void spapr_rtc_read(SpaprRtcState *rtc, struct tm *tm, uint32_t *ns);
 int spapr_rtc_import_offset(SpaprRtcState *rtc, int64_t legacy_offset);
+void spapr_set_associativity(uint32_t *assoc, int node_id, int cpu_index);
 
 #define TYPE_SPAPR_RNG "spapr-rng"
 
-- 
2.26.2