diff --git a/arch/loongarch/kvm/main.c b/arch/loongarch/kvm/main.c
index 80ea63d465b8..f3211fc447fd 100644
--- a/arch/loongarch/kvm/main.c
+++ b/arch/loongarch/kvm/main.c
@@ -192,6 +192,13 @@ static void kvm_init_gcsr_flag(void)
 	set_gcsr_sw_flag(LOONGARCH_CSR_PERFCNTR2);
 	set_gcsr_sw_flag(LOONGARCH_CSR_PERFCTRL3);
 	set_gcsr_sw_flag(LOONGARCH_CSR_PERFCNTR3);
+
+	if (cpu_has_msgint) {
+		set_gcsr_hw_flag(LOONGARCH_CSR_ISR0);
+		set_gcsr_hw_flag(LOONGARCH_CSR_ISR1);
+		set_gcsr_hw_flag(LOONGARCH_CSR_ISR2);
+		set_gcsr_hw_flag(LOONGARCH_CSR_ISR3);
+	}
 }
 
 static void kvm_update_vpid(struct kvm_vcpu *vcpu, int cpu)