move global x2apic_enabled into arch dir

the x2apic_enabled should be x86 specific field.

Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>
Acked-by: Xu, Anthony <anthony.xu@intel.com>

hypervisor/arch/x86/cpu.c

@@ -27,6 +27,9 @@ volatile uint16_t up_count = 0U;
 /* physical cpu active bitmap, support up to 64 cpus */
 uint64_t pcpu_active_bitmap = 0UL;
 
+/* X2APIC mode is disabled by default. */
+bool x2apic_enabled = false;
+
 /* TODO: add more capability per requirement */
 /* APICv features */
 #define VAPIC_FEATURE_VIRT_ACCESS		(1U << 0)

hypervisor/arch/x86/cpuid.c

@@ -6,6 +6,8 @@
 
 #include <hypervisor.h>
 
+extern bool x2apic_enabled;
+
 static inline struct vcpuid_entry *find_vcpuid_entry(struct vcpu *vcpu,
 					uint32_t leaf_arg, uint32_t subleaf)
 {

hypervisor/common/hv_main.c

@@ -8,8 +8,6 @@
 #include <schedule.h>
 #include <softirq.h>
 
-bool x2apic_enabled;
-
 static void run_vcpu_pre_work(struct vcpu *vcpu)
 {
 	uint64_t *pending_pre_work = &vcpu->pending_pre_work;

hypervisor/include/arch/x86/guest/vm.h

@@ -190,6 +190,5 @@ struct vm *get_vm_from_vmid(uint16_t vm_id);
 
 extern struct list_head vm_list;
 extern spinlock_t vm_list_lock;
-extern bool x2apic_enabled;
 
 #endif /* VM_H_ */