KVM: arm/arm64: vgic-its: Do not execute invalidate MSI-LPI translation cache on movi command

euleros inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I4J0W7
CVE: NA

-------------------------------------------------

It is not necessary to invalidate the lpi translation cache when the
virtual machine executes the movi instruction to adjust the affinity of
the interrupt. Irqbalance will adjust the interrupt affinity in a short
period of time to achieve the purpose of interrupting load balancing,
but this does not affect the contents of the lpi translation cache.
Signed-off-by: NXiangyou Xie <xiexiangyou@huawei.com>
Reviewed-by: NHailiang Zhang <zhang.zhanghailiang@huawei.com>
Signed-off-by: NXiangyou Xie <xiexiangyou@huawei.com>
Signed-off-by: NYang Yingliang <yangyingliang@huawei.com>
Signed-off-by: NChaochao Xing <xingchaochao@huawei.com>
Reviewed-by: NXiangyou Xie <xiexiangyou@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

arch/arm64/kvm/vgic/vgic-its.c

@@ -921,7 +921,8 @@ static int vgic_its_cmd_handle_movi(struct kvm *kvm, struct vgic_its *its,
 	ite->collection = collection;
 	vcpu = kvm_get_vcpu(kvm, collection->target_addr);
 
-	vgic_its_invalidate_cache(kvm);
+	if (!vcpu->arch.vgic_cpu.lpis_enabled)
+		vgic_its_invalidate_cache(kvm);
 
 	return update_affinity(ite->irq, vcpu);
 }