[PATCH 3/8] target/riscv/kvm/kvm-cpu.c: add missing property getters()

[Daniel Henrique Barboza]

We got along without property getters in the KVM driver because we never
needed them. But the incoming query-cpu-model-expansion API will use
property getters and setters to retrieve the CPU characteristics.

Add the missing getters for the KVM driver for both MISA and
multi-letter extension properties. We're also adding an special getter
for absent multi-letter properties that KVM doesn't implement that
always return false.

Signed-off-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
---
 target/riscv/kvm/kvm-cpu.c | 40 +++++++++++++++++++++++++++++++++++---
 1 file changed, 37 insertions(+), 3 deletions(-)

diff --git a/target/riscv/kvm/kvm-cpu.c b/target/riscv/kvm/kvm-cpu.c
index c6615cb807..b4c231f231 100644
--- a/target/riscv/kvm/kvm-cpu.c
+++ b/target/riscv/kvm/kvm-cpu.c
@@ -140,6 +140,19 @@ static KVMCPUConfig kvm_misa_ext_cfgs[] = {
     KVM_MISA_CFG(RVM, KVM_RISCV_ISA_EXT_M),
 };
 
+static void kvm_cpu_get_misa_ext_cfg(Object *obj, Visitor *v,
+                                     const char *name,
+                                     void *opaque, Error **errp)
+{
+    KVMCPUConfig *misa_ext_cfg = opaque;
+    target_ulong misa_bit = misa_ext_cfg->offset;
+    RISCVCPU *cpu = RISCV_CPU(obj);
+    CPURISCVState *env = &cpu->env;
+    bool value = env->misa_ext_mask & misa_bit;
+
+    visit_type_bool(v, name, &value, errp);
+}
+
 static void kvm_cpu_set_misa_ext_cfg(Object *obj, Visitor *v,
                                      const char *name,
                                      void *opaque, Error **errp)
@@ -244,6 +257,17 @@ static uint32_t kvm_cpu_cfg_get(RISCVCPU *cpu,
     return *ext_enabled;
 }
 
+static void kvm_cpu_get_multi_ext_cfg(Object *obj, Visitor *v,
+                                      const char *name,
+                                      void *opaque, Error **errp)
+{
+    KVMCPUConfig *multi_ext_cfg = opaque;
+    RISCVCPU *cpu = RISCV_CPU(obj);
+    bool value = kvm_cpu_cfg_get(cpu, multi_ext_cfg);
+
+    visit_type_bool(v, name, &value, errp);
+}
+
 static void kvm_cpu_set_multi_ext_cfg(Object *obj, Visitor *v,
                                       const char *name,
                                       void *opaque, Error **errp)
@@ -346,6 +370,15 @@ static void kvm_riscv_update_cpu_cfg_isa_ext(RISCVCPU 
*cpu, CPUState *cs)
     }
 }
 
+static void cpu_get_cfg_unavailable(Object *obj, Visitor *v,
+                                    const char *name,
+                                    void *opaque, Error **errp)
+{
+    bool value = false;
+
+    visit_type_bool(v, name, &value, errp);
+}
+
 static void cpu_set_cfg_unavailable(Object *obj, Visitor *v,
                                     const char *name,
                                     void *opaque, Error **errp)
@@ -376,7 +409,8 @@ static void riscv_cpu_add_kvm_unavail_prop(Object *obj, 
const char *prop_name)
      * to enable any of them.
      */
     object_property_add(obj, prop_name, "bool",
-                        NULL, cpu_set_cfg_unavailable,
+                        cpu_get_cfg_unavailable,
+                        cpu_set_cfg_unavailable,
                         NULL, (void *)prop_name);
 }
 
@@ -406,7 +440,7 @@ static void kvm_riscv_add_cpu_user_properties(Object 
*cpu_obj)
         misa_cfg->description = riscv_get_misa_ext_description(bit);
 
         object_property_add(cpu_obj, misa_cfg->name, "bool",
-                            NULL,
+                            kvm_cpu_get_misa_ext_cfg,
                             kvm_cpu_set_misa_ext_cfg,
                             NULL, misa_cfg);
         object_property_set_description(cpu_obj, misa_cfg->name,
@@ -422,7 +456,7 @@ static void kvm_riscv_add_cpu_user_properties(Object 
*cpu_obj)
         KVMCPUConfig *multi_cfg = &kvm_multi_ext_cfgs[i];
 
         object_property_add(cpu_obj, multi_cfg->name, "bool",
-                            NULL,
+                            kvm_cpu_get_multi_ext_cfg,
                             kvm_cpu_set_multi_ext_cfg,
                             NULL, multi_cfg);
     }
-- 
2.41.0