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hw/intc/arm_gic(v3)_kvm: Initialize gsi routing 

Advertise gsi routing and set up irqchip routing entries for
GIC SPIs.

This is not mandated as long as MSI routing is not used
(because the kernel sets a default irqchip routing table).
However once MSI routing gets used (for VIRTIO-PCI vhost for
example), the first call to KVM_SET_GSI_ROUTING overrides the
kernel default irqchip table.

If no routing entry exists for the GSI, any IRQFD signaling for
this GSI will fail.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1474616617-366-2-git-send-email-eric.auger@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Eric Auger 2016-10-04 13:28:08 +01:00 committed by Peter Maydell
parent 96b0439bbe
commit d19a4d4ef4
2 changed files with 25 additions and 0 deletions
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12
hw/intc/arm_gic_kvm.c
View File

@ -577,6 +577,18 @@ static void kvm_arm_gic_realize(DeviceState *dev, Error **errp)
"not support vGICv2 migration");
migrate_add_blocker(s->migration_blocker);
}
if (kvm_has_gsi_routing()) {
/* set up irq routing */
kvm_init_irq_routing(kvm_state);
for (i = 0; i < s->num_irq - GIC_INTERNAL; ++i) {
kvm_irqchip_add_irq_route(kvm_state, i, 0, i);
}
kvm_gsi_routing_allowed = true;
kvm_irqchip_commit_routes(kvm_state);
}
}
static void kvm_arm_gic_class_init(ObjectClass *klass, void *data)

13
hw/intc/arm_gicv3_kvm.c
View File

@ -85,6 +85,7 @@ static void kvm_arm_gicv3_realize(DeviceState *dev, Error **errp)
GICv3State *s = KVM_ARM_GICV3(dev);
KVMARMGICv3Class *kgc = KVM_ARM_GICV3_GET_CLASS(s);
Error *local_err = NULL;
int i;
DPRINTF("kvm_arm_gicv3_realize\n");
@ -127,6 +128,18 @@ static void kvm_arm_gicv3_realize(DeviceState *dev, Error **errp)
*/
error_setg(&s->migration_blocker, "vGICv3 migration is not implemented");
migrate_add_blocker(s->migration_blocker);
if (kvm_has_gsi_routing()) {
/* set up irq routing */
kvm_init_irq_routing(kvm_state);
for (i = 0; i < s->num_irq - GIC_INTERNAL; ++i) {
kvm_irqchip_add_irq_route(kvm_state, i, 0, i);
}
kvm_gsi_routing_allowed = true;
kvm_irqchip_commit_routes(kvm_state);
}
}
static void kvm_arm_gicv3_class_init(ObjectClass *klass, void *data)