diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index 3b3098ee76..1828366d93 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -1327,6 +1327,7 @@ static void riscv_cpu_init(Object *obj)
     cpu->cfg.vlen = 128;
     cpu->cfg.elen = 64;
     cpu->cfg.cbom_blocksize = 64;
+    cpu->cfg.cbop_blocksize = 64;
     cpu->env.vext_ver = VEXT_VERSION_1_00_0;
 }
 
@@ -1913,8 +1914,42 @@ static const PropertyInfo prop_cbom_blksize = {
     .set = prop_cbom_blksize_set,
 };
 
+static void prop_cbop_blksize_set(Object *obj, Visitor *v, const char *name,
+                                  void *opaque, Error **errp)
+{
+    RISCVCPU *cpu = RISCV_CPU(obj);
+    uint16_t value;
+
+    if (!visit_type_uint16(v, name, &value, errp)) {
+        return;
+    }
+
+    if (value != cpu->cfg.cbop_blocksize && riscv_cpu_is_vendor(obj)) {
+        cpu_set_prop_err(cpu, name, errp);
+        error_append_hint(errp, "Current '%s' val: %u\n",
+                          name, cpu->cfg.cbop_blocksize);
+        return;
+    }
+
+    cpu_option_add_user_setting(name, value);
+    cpu->cfg.cbop_blocksize = value;
+}
+
+static void prop_cbop_blksize_get(Object *obj, Visitor *v, const char *name,
+                         void *opaque, Error **errp)
+{
+    uint16_t value = RISCV_CPU(obj)->cfg.cbop_blocksize;
+
+    visit_type_uint16(v, name, &value, errp);
+}
+
+static const PropertyInfo prop_cbop_blksize = {
+    .name = "cbop_blocksize",
+    .get = prop_cbop_blksize_get,
+    .set = prop_cbop_blksize_set,
+};
+
 Property riscv_cpu_options[] = {
-    DEFINE_PROP_UINT16("cbop_blocksize", RISCVCPU, cfg.cbop_blocksize, 64),
     DEFINE_PROP_UINT16("cboz_blocksize", RISCVCPU, cfg.cboz_blocksize, 64),
 
     DEFINE_PROP_END_OF_LIST(),
@@ -2003,6 +2038,7 @@ static Property riscv_cpu_properties[] = {
     {.name = "elen", .info = &prop_elen},
 
     {.name = "cbom_blocksize", .info = &prop_cbom_blksize},
+    {.name = "cbop_blocksize", .info = &prop_cbop_blksize},
 
 #ifndef CONFIG_USER_ONLY
     DEFINE_PROP_UINT64("resetvec", RISCVCPU, env.resetvec, DEFAULT_RSTVEC),