From: Xiangyou Xie <xiexiangyou@huawei.com>
To: <marc.zyngier@arm.com>
Cc: kvmarm@lists.cs.columbia.edu,
linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org
Subject: [PATCH 2/3] KVM: arm/arm64: vgic-its: Do not execute invalidate MSI-LPI translation cache on movi command
Date: Wed, 24 Jul 2019 17:04:36 +0800 [thread overview]
Message-ID: <20190724090437.49952-3-xiexiangyou@huawei.com> (raw)
In-Reply-To: <20190724090437.49952-1-xiexiangyou@huawei.com>
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>
---
virt/kvm/arm/vgic/vgic-its.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/virt/kvm/arm/vgic/vgic-its.c b/virt/kvm/arm/vgic/vgic-its.c
index 792d90b..66e93ab 100644
--- a/virt/kvm/arm/vgic/vgic-its.c
+++ b/virt/kvm/arm/vgic/vgic-its.c
@@ -907,8 +907,6 @@ 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);
-
return update_affinity(ite->irq, vcpu);
}
--
1.8.3.1
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next prev parent reply other threads:[~2019-07-24 9:04 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-24 9:04 [PATCH 0/3] KVM: arm/arm64: Optimize lpi translation cache performance Xiangyou Xie
2019-07-24 9:04 ` [PATCH 1/3] KVM: arm/arm64: vgic-its: Introduce multiple LPI translation caches Xiangyou Xie
2019-07-24 11:09 ` Marc Zyngier
2019-07-26 12:35 ` Xiangyou Xie
2019-07-26 13:02 ` Marc Zyngier
2019-07-27 6:13 ` Xiangyou Xie
2019-07-24 9:04 ` Xiangyou Xie [this message]
2019-07-24 11:20 ` [PATCH 2/3] KVM: arm/arm64: vgic-its: Do not execute invalidate MSI-LPI translation cache on movi command Marc Zyngier
2019-07-24 9:04 ` [PATCH 3/3] KVM: arm/arm64: vgic: introduce vgic_cpu pending status and lowest_priority Xiangyou Xie
2019-07-24 11:39 ` Marc Zyngier
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