accel: Move KVM accel registration to kvm-all.c

Note that this has an user-visible side-effect: instead of reporting
"KVM is not supported for this target", QEMU binaries not supporting KVM
will report "kvm accelerator does not exist".

As kvm_availble() always return 1 when CONFIG_KVM is enabled, we don't
need to set AccelClass.available anymore. kvm_enabled() is not being
completely removed yet only because qmp_query_kvm() still uses it.

This also allows us to make kvm_init() static.
Reviewed-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NEduardo Habkost <ehabkost@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

accel.c

@@ -149,23 +149,6 @@ static const TypeInfo xen_accel_type = {
     .class_init = xen_accel_class_init,
 };
 
-static void kvm_accel_class_init(ObjectClass *oc, void *data)
-{
-    AccelClass *ac = ACCEL_CLASS(oc);
-    ac->name = "KVM";
-    ac->available = kvm_available;
-    ac->init = kvm_init;
-    ac->allowed = &kvm_allowed;
-}
-
-#define TYPE_KVM_ACCEL ACCEL_CLASS_NAME("kvm")
-
-static const TypeInfo kvm_accel_type = {
-    .name = TYPE_KVM_ACCEL,
-    .parent = TYPE_ACCEL,
-    .class_init = kvm_accel_class_init,
-};
-
 static void qtest_accel_class_init(ObjectClass *oc, void *data)
 {
     AccelClass *ac = ACCEL_CLASS(oc);
@@ -188,7 +171,6 @@ static void register_accel_types(void)
     type_register_static(&accel_type);
     type_register_static(&tcg_accel_type);
     type_register_static(&xen_accel_type);
-    type_register_static(&kvm_accel_type);
     type_register_static(&qtest_accel_type);
 }
 

include/sysemu/kvm.h

@@ -163,8 +163,6 @@ extern KVMState *kvm_state;
 
 /* external API */
 
-int kvm_init(MachineClass *mc);
-
 int kvm_has_sync_mmu(void);
 int kvm_has_vcpu_events(void);
 int kvm_has_robust_singlestep(void);

kvm-all.c

@@ -25,6 +25,7 @@
 #include "qemu/option.h"
 #include "qemu/config-file.h"
 #include "sysemu/sysemu.h"
+#include "sysemu/accel.h"
 #include "hw/hw.h"
 #include "hw/pci/msi.h"
 #include "hw/s390x/adapter.h"
@@ -106,6 +107,8 @@ struct KVMState
 #endif
 };
 
+#define TYPE_KVM_ACCEL ACCEL_CLASS_NAME("kvm")
+
 KVMState *kvm_state;
 bool kvm_kernel_irqchip;
 bool kvm_async_interrupts_allowed;
@@ -1377,7 +1380,7 @@ static int kvm_max_vcpus(KVMState *s)
     return (ret) ? ret : kvm_recommended_vcpus(s);
 }
 
-int kvm_init(MachineClass *mc)
+static int kvm_init(MachineClass *mc)
 {
     static const char upgrade_note[] =
         "Please upgrade to at least kernel 2.6.29 or recent kvm-kmod\n"
@@ -2225,3 +2228,24 @@ int kvm_get_one_reg(CPUState *cs, uint64_t id, void *target)
     }
     return r;
 }
+
+static void kvm_accel_class_init(ObjectClass *oc, void *data)
+{
+    AccelClass *ac = ACCEL_CLASS(oc);
+    ac->name = "KVM";
+    ac->init = kvm_init;
+    ac->allowed = &kvm_allowed;
+}
+
+static const TypeInfo kvm_accel_type = {
+    .name = TYPE_KVM_ACCEL,
+    .parent = TYPE_ACCEL,
+    .class_init = kvm_accel_class_init,
+};
+
+static void kvm_type_init(void)
+{
+    type_register_static(&kvm_accel_type);
+}
+
+type_init(kvm_type_init);

kvm-stub.c

@@ -35,11 +35,6 @@ int kvm_init_vcpu(CPUState *cpu)
     return -ENOSYS;
 }
 
-int kvm_init(MachineClass *mc)
-{
-    return -ENOSYS;
-}
-
 void kvm_flush_coalesced_mmio_buffer(void)
 {
 }