[PATCH v1 3/3] hw/riscv/microchip_pfsoc: Use the PLIC config helper function

[Alistair Francis]

From: Alistair Francis <alistair.francis@wdc.com>

Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 include/hw/riscv/microchip_pfsoc.h |  1 -
 hw/riscv/microchip_pfsoc.c         | 36 +++++++++++++++++++-----------
 2 files changed, 23 insertions(+), 14 deletions(-)

diff --git a/include/hw/riscv/microchip_pfsoc.h 
b/include/hw/riscv/microchip_pfsoc.h
index d30916f45d..a0673f5f59 100644
--- a/include/hw/riscv/microchip_pfsoc.h
+++ b/include/hw/riscv/microchip_pfsoc.h
@@ -138,7 +138,6 @@ enum {
 #define MICROCHIP_PFSOC_MANAGEMENT_CPU_COUNT    1
 #define MICROCHIP_PFSOC_COMPUTE_CPU_COUNT       4
 
-#define MICROCHIP_PFSOC_PLIC_HART_CONFIG        "MS"
 #define MICROCHIP_PFSOC_PLIC_NUM_SOURCES        185
 #define MICROCHIP_PFSOC_PLIC_NUM_PRIORITIES     7
 #define MICROCHIP_PFSOC_PLIC_PRIORITY_BASE      0x04
diff --git a/hw/riscv/microchip_pfsoc.c b/hw/riscv/microchip_pfsoc.c
index eb8e79e0a1..ec237761e7 100644
--- a/hw/riscv/microchip_pfsoc.c
+++ b/hw/riscv/microchip_pfsoc.c
@@ -128,6 +128,28 @@ static const MemMapEntry microchip_pfsoc_memmap[] = {
     [MICROCHIP_PFSOC_DRAM_HI_ALIAS] = { 0x1400000000,        0x0 },
 };
 
+/*
+ * Return the per-socket PLIC hart topology configuration string
+ * (caller must free with g_free())
+ */
+static char *riscv_plic_hart_config_string(int hart_count)
+{
+    g_autofree const char **vals = g_new(const char *, hart_count + 1);
+    int i;
+
+    for (i = 0; i < hart_count; i++) {
+        if (i == 0) {
+            vals[i] = "M";
+        } else {
+            vals[i] = "MS";
+        }
+    }
+    vals[i] = NULL;
+
+    /* g_strjoinv() obliges us to cast away const here */
+    return g_strjoinv(",", (char **)vals);
+}
+
 static void microchip_pfsoc_soc_instance_init(Object *obj)
 {
     MachineState *ms = MACHINE(qdev_get_machine());
@@ -187,7 +209,6 @@ static void microchip_pfsoc_soc_realize(DeviceState *dev, 
Error **errp)
     MemoryRegion *envm_data = g_new(MemoryRegion, 1);
     MemoryRegion *qspi_xip_mem = g_new(MemoryRegion, 1);
     char *plic_hart_config;
-    size_t plic_hart_config_len;
     NICInfo *nd;
     int i;
 
@@ -259,18 +280,7 @@ static void microchip_pfsoc_soc_realize(DeviceState *dev, 
Error **errp)
                                 l2lim_mem);
 
     /* create PLIC hart topology configuration string */
-    plic_hart_config_len = (strlen(MICROCHIP_PFSOC_PLIC_HART_CONFIG) + 1) *
-                           ms->smp.cpus;
-    plic_hart_config = g_malloc0(plic_hart_config_len);
-    for (i = 0; i < ms->smp.cpus; i++) {
-        if (i != 0) {
-            strncat(plic_hart_config, "," MICROCHIP_PFSOC_PLIC_HART_CONFIG,
-                    plic_hart_config_len);
-        } else {
-            strncat(plic_hart_config, "M", plic_hart_config_len);
-        }
-        plic_hart_config_len -= (strlen(MICROCHIP_PFSOC_PLIC_HART_CONFIG) + 1);
-    }
+    plic_hart_config = riscv_plic_hart_config_string(ms->smp.cpus);
 
     /* PLIC */
     s->plic = sifive_plic_create(memmap[MICROCHIP_PFSOC_PLIC].base,
-- 
2.31.1