Commit c89f1e49 authored Nov 26, 2021 by Xiangyou Xie Committed by Zheng Zengkai Nov 26, 2021

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: Xiangyou Xie <xiexiangyou@huawei.com>
Reviewed-by: Hailiang Zhang <zhang.zhanghailiang@huawei.com>
Signed-off-by: Xiangyou Xie <xiexiangyou@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Chaochao Xing <xingchaochao@huawei.com>
Reviewed-by: Xiangyou Xie <xiexiangyou@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>

parent def3bcbd

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

+2 −1

Original line number	Diff line number	Diff line
		@@ -921,6 +921,7 @@ 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);

		if (!vcpu->arch.vgic_cpu.lpis_enabled)
		vgic_its_invalidate_cache(kvm);

		return update_affinity(ite->irq, vcpu);