hv: Add is_xapic_enabled API to check vLAPIC moe

is_xapic_enabled API returns true if vLAPIC is in xAPIC mode. In
all other cases, it returns false.

Tracked-On: #3253
Signed-off-by: Sainath Grandhi <sainath.grandhi@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>

Author: Sainath Grandhi

hypervisor/arch/x86/guest/vlapic.c

@@ -1998,6 +1998,16 @@ bool is_x2apic_enabled(const struct acrn_vlapic *vlapic)
 	return ret;
 }
 
+bool is_xapic_enabled(const struct acrn_vlapic *vlapic)
+{
+	bool ret = false;
+	if ((vlapic_get_apicbase(vlapic) & APICBASE_LAPIC_MODE) == APICBASE_XAPIC) {
+	        ret = true;
+	}
+
+	return ret;
+}
+
 static inline  uint32_t x2apic_msr_to_regoff(uint32_t msr)
 {
 

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

@@ -212,6 +212,7 @@ void vlapic_calc_dest_lapic_pt(struct acrn_vm *vm, uint64_t *dmask, bool is_broa
 		uint32_t dest, bool phys);
 bool is_lapic_pt_enabled(struct acrn_vm *vm);
 bool is_x2apic_enabled(const struct acrn_vlapic *vlapic);
+bool is_xapic_enabled(const struct acrn_vlapic *vlapic);
 /**
  * @}
  */