From: Xiangyou Xie xiexiangyou@huawei.com
euleros inclusion from OLK-5.10 commit c89f1e49300a category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I8UJ9Q Reference: https://lore.kernel.org/kvmarm/20190724090437.49952-3-xiexiangyou@huawei.com... CVE: NA
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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 Signed-off-by: jiaqingtong jiaqingtong@huawei.com --- arch/arm64/kvm/vgic/vgic-its.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/arm64/kvm/vgic/vgic-its.c b/arch/arm64/kvm/vgic/vgic-its.c index 24764ef12486..ff91e208c752 100644 --- a/arch/arm64/kvm/vgic/vgic-its.c +++ b/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 (!vgic_lpis_enabled(vcpu)) + vgic_its_invalidate_cache(kvm);
return update_affinity(ite->irq, vcpu); }