[Qemu-devel] [PATCH 2/3] apic: add get/put methods

[Paolo Bonzini <pbonzini@redhat.com>]

Change the hard-coded references to kvm_get_apic_state and
kvm_put_apic_state to methods in APICCommonClass.  This makes it possible
to reuse the methods in common code that cannot assume the presence
of KVM.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 hw/apic.h          |    2 ++
 hw/apic_common.c   |   32 ++++++++++++++++++++++++++++++++
 hw/apic_internal.h |    2 ++
 hw/kvm/apic.c      |    8 ++++----
 kvm.h              |    3 ---
 target-i386/kvm.c  |   24 ++----------------------
 6 files changed, 42 insertions(+), 29 deletions(-)

diff --git a/hw/apic.h b/hw/apic.h
index 1d48e02..f15d100 100644
--- a/hw/apic.h
+++ b/hw/apic.h
@@ -12,6 +12,8 @@ void apic_deliver_nmi(DeviceState *d);
 int apic_get_interrupt(DeviceState *s);
 void apic_reset_irq_delivered(void);
 int apic_get_irq_delivered(void);
+int cpu_get_apic_state(DeviceState *d);
+int cpu_put_apic_state(DeviceState *d);
 void cpu_set_apic_base(DeviceState *s, uint64_t val);
 uint64_t cpu_get_apic_base(DeviceState *s);
 void cpu_set_apic_tpr(DeviceState *s, uint8_t val);
diff --git a/hw/apic_common.c b/hw/apic_common.c
index d68116d..f373ba8 100644
--- a/hw/apic_common.c
+++ b/hw/apic_common.c
@@ -312,6 +312,38 @@ static int apic_init_common(SysBusDevice *dev)
     return 0;
 }
 
+int cpu_get_apic_state(DeviceState *apic)
+{
+    APICCommonState *s;
+    APICCommonClass *info;
+    if (!apic) {
+        return 0;
+    }
+
+    s = APIC_COMMON(apic);
+    info = APIC_COMMON_GET_CLASS(s);
+    if (info->get) {
+        return info->get(s);
+    }
+    return 0;
+}
+
+int cpu_put_apic_state(DeviceState *apic)
+{
+    APICCommonState *s;
+    APICCommonClass *info;
+    if (!apic) {
+        return 0;
+    }
+
+    s = APIC_COMMON(apic);
+    info = APIC_COMMON_GET_CLASS(s);
+    if (info->put) {
+        return info->put(s);
+    }
+    return 0;
+}
+
 static void apic_dispatch_pre_save(void *opaque)
 {
     APICCommonState *s = APIC_COMMON(opaque);
diff --git a/hw/apic_internal.h b/hw/apic_internal.h
index 30932a3..256fb1a 100644
--- a/hw/apic_internal.h
+++ b/hw/apic_internal.h
@@ -89,6 +89,8 @@ typedef struct APICCommonClass
     void (*enable_tpr_reporting)(APICCommonState *s, bool enable);
     void (*vapic_base_update)(APICCommonState *s);
     void (*external_nmi)(APICCommonState *s);
+    int (*get)(APICCommonState *s);
+    int (*put)(APICCommonState *s);
     void (*pre_save)(APICCommonState *s);
     void (*post_load)(APICCommonState *s);
 } APICCommonClass;
diff --git a/hw/kvm/apic.c b/hw/kvm/apic.c
index ddf6b7d..35afe0c 100644
--- a/hw/kvm/apic.c
+++ b/hw/kvm/apic.c
@@ -25,9 +25,8 @@ static inline uint32_t kvm_apic_get_reg(struct kvm_lapic_state *kapic,
     return *((uint32_t *)(kapic->regs + (reg_id << 4)));
 }
 
-int kvm_put_apic_state(DeviceState *d)
+static int kvm_put_apic_state(APICCommonState *s)
 {
-    APICCommonState *s = DO_UPCAST(APICCommonState, busdev.qdev, d);
     struct kvm_lapic_state kapic;
     int i;
 
@@ -54,9 +53,8 @@ int kvm_put_apic_state(DeviceState *d)
     return kvm_vcpu_ioctl(s->cpu_env, KVM_SET_LAPIC, &kapic);
 }
 
-int kvm_get_apic_state(DeviceState *d)
+static int kvm_get_apic_state(APICCommonState *s)
 {
-    APICCommonState *s = DO_UPCAST(APICCommonState, busdev.qdev, d);
     struct kvm_lapic_state kapic;
     int i, v, ret;
 
@@ -202,6 +200,8 @@ static void kvm_apic_class_init(ObjectClass *klass, void *data)
     k->enable_tpr_reporting = kvm_apic_enable_tpr_reporting;
     k->vapic_base_update = kvm_apic_vapic_base_update;
     k->external_nmi = kvm_apic_external_nmi;
+    k->get = kvm_get_apic_state;
+    k->put = kvm_put_apic_state;
 }
 
 static TypeInfo kvm_apic_info = {
diff --git a/kvm.h b/kvm.h
index 0056f92..83f7b05 100644
--- a/kvm.h
+++ b/kvm.h
@@ -191,9 +191,6 @@ int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg);
 
 void kvm_irqchip_add_irq_route(KVMState *s, int gsi, int irqchip, int pin);
 
-int kvm_put_apic_state(DeviceState *d);
-int kvm_get_apic_state(DeviceState *d);
-
 struct kvm_guest_debug;
 struct kvm_debug_exit_arch;
 
diff --git a/target-i386/kvm.c b/target-i386/kvm.c
index 092d4f1..0912e15 100644
--- a/target-i386/kvm.c
+++ b/target-i386/kvm.c
@@ -1381,26 +1381,6 @@ static int kvm_get_mp_state(CPUX86State *env)
     return 0;
 }
 
-static int kvm_get_apic(CPUX86State *env)
-{
-    DeviceState *apic = env->apic_state;
-
-    if (apic && kvm_irqchip_in_kernel()) {
-        return kvm_get_apic_state(apic);
-    }
-    return 0;
-}
-
-static int kvm_put_apic(CPUX86State *env)
-{
-    DeviceState *apic = env->apic_state;
-
-    if (apic && kvm_irqchip_in_kernel()) {
-        return kvm_put_apic_state(apic);
-    }
-    return 0;
-}
-
 static int kvm_put_vcpu_events(CPUX86State *env, int level)
 {
     struct kvm_vcpu_events events;
@@ -1576,7 +1556,7 @@ int kvm_arch_put_registers(CPUX86State *env, int level)
         if (ret < 0) {
             return ret;
         }
-        ret = kvm_put_apic(env);
+        ret = cpu_put_apic_state(env->apic_state);
         if (ret < 0) {
             return ret;
         }
@@ -1627,7 +1607,7 @@ int kvm_arch_get_registers(CPUX86State *env)
     if (ret < 0) {
         return ret;
     }
-    ret = kvm_get_apic(env);
+    ret = cpu_get_apic_state(env->apic_state);
     if (ret < 0) {
         return ret;
     }
-- 
1.7.1