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authorMarc Zyngier <maz@kernel.org>2019-11-07 19:04:11 +0300
committerMarc Zyngier <maz@kernel.org>2019-11-08 14:13:24 +0300
commit5bd90b0989731520f2cdcfbbe467f1271f3cc803 (patch)
treef54a4b2b5212fa7916d6ecdf90c8eabf9ae9bff8 /virt/kvm/arm/vgic/vgic-init.c
parent9090825fa99740f0c794f94b9cbd57ad79101228 (diff)
downloadlinux-5bd90b0989731520f2cdcfbbe467f1271f3cc803.tar.xz
KVM: vgic-v4: Track the number of VLPIs per vcpu
In order to find out whether a vcpu is likely to be the target of VLPIs (and to further optimize the way we deal with those), let's track the number of VLPIs a vcpu can receive. This gets implemented with an atomic variable that gets incremented or decremented on map, unmap and move of a VLPI. Signed-off-by: Marc Zyngier <maz@kernel.org> Reviewed-by: Zenghui Yu <yuzenghui@huawei.com> Reviewed-by: Christoffer Dall <christoffer.dall@arm.com> Link: https://lore.kernel.org/r/20191107160412.30301-2-maz@kernel.org
Diffstat (limited to 'virt/kvm/arm/vgic/vgic-init.c')
-rw-r--r--virt/kvm/arm/vgic/vgic-init.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/virt/kvm/arm/vgic/vgic-init.c b/virt/kvm/arm/vgic/vgic-init.c
index 6f50c429196d..b3c5de48064c 100644
--- a/virt/kvm/arm/vgic/vgic-init.c
+++ b/virt/kvm/arm/vgic/vgic-init.c
@@ -203,6 +203,7 @@ int kvm_vgic_vcpu_init(struct kvm_vcpu *vcpu)
INIT_LIST_HEAD(&vgic_cpu->ap_list_head);
raw_spin_lock_init(&vgic_cpu->ap_list_lock);
+ atomic_set(&vgic_cpu->vgic_v3.its_vpe.vlpi_count, 0);
/*
* Enable and configure all SGIs to be edge-triggered and