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authorPeter Xu <peterx@redhat.com>2016-07-14 13:56:31 +0800
committerMichael S. Tsirkin <mst@redhat.com>2016-07-21 20:44:19 +0300
commit38d87493f37e5dc442c7419c5843fcf60bb39d63 (patch)
tree3df87c6be19b1e00d20752de43904388973f4d36 /kvm-all.c
parentd1f6af6a17a66f58c238e1c26b928cf71c0c11da (diff)
kvm-irqchip: i386: add hook for add/remove virq
Adding two hooks to be notified when adding/removing msi routes. There are two kinds of MSI routes: - in kvm_irqchip_add_irq_route(): before assigning IRQFD. Used by vhost, vfio, etc. - in kvm_irqchip_send_msi(): when sending direct MSI message, if direct MSI not allowed, we will first create one MSI route entry in the kernel, then trigger it. This patch only hooks the first one (irqfd case). We do not need to take care for the 2nd one, since it's only used by QEMU userspace (kvm-apic) and the messages will always do in-time translation when triggered. While we need to note them down for the 1st one, so that we can notify the kernel when cache invalidation happens. Also, we do not hook IOAPIC msi routes (we have explicit notifier for IOAPIC to keep its cache updated). We only need to care about irqfd users. Signed-off-by: Peter Xu <peterx@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'kvm-all.c')
-rw-r--r--kvm-all.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/kvm-all.c b/kvm-all.c
index d94c0e4855..69ff658f4d 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -1133,6 +1133,7 @@ void kvm_irqchip_release_virq(KVMState *s, int virq)
}
}
clear_gsi(s, virq);
+ kvm_arch_release_virq_post(virq);
}
static unsigned int kvm_hash_msi(uint32_t data)
@@ -1281,6 +1282,7 @@ int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev)
}
kvm_add_routing_entry(s, &kroute);
+ kvm_arch_add_msi_route_post(&kroute, vector, dev);
kvm_irqchip_commit_routes(s);
return virq;