[PATCH v4 5/7] KVM: arm/arm64: build a default routing table

Eric Auger
2016-04-04T08:47:58Z

Implement a default routing table made of flat irqchip routing
entries (gsi = irqchip.pin) covering the VGIC SPI indexes.
This routing table is overwritten by the first user-space call
to KVM_SET_GSI_ROUTING ioctl.

Signed-off-by: Eric Auger <eric.auger@linaro.org>

---
---
virt/kvm/arm/vgic/vgic_init.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)

diff --git a/virt/kvm/arm/vgic/vgic_init.c b/virt/kvm/arm/vgic/vgic_init.c
index e4459e3..041443b 100644
--- a/virt/kvm/arm/vgic/vgic_init.c
+++ b/virt/kvm/arm/vgic/vgic_init.c
@@ -261,6 +261,10 @@ int vgic_init(struct kvm *kvm)
kvm_for_each_vcpu(i, vcpu, kvm)
kvm_vgic_vcpu_init(vcpu);

+ ret = kvm_setup_default_irq_routing(kvm);
+ if (ret)
+ goto out;
+
dist->initialized = true;
out:
return ret;
@@ -454,3 +458,23 @@ out_free_irq:
kvm_get_running_vcpus());
return ret;
}
+
+int kvm_setup_default_irq_routing(struct kvm *kvm)
+{
+ struct kvm_irq_routing_entry *entries;
+ struct vgic_dist *dist = &kvm->arch.vgic;
+ u32 nr = dist->nr_spis;
+ int i, ret;
+
+ entries = kcalloc(nr, sizeof(struct kvm_kernel_irq_routing_entry),
+ GFP_KERNEL);
+ for (i = 0; i < nr; i++) {
+ entries[i].gsi = i;
+ entries[i].type = KVM_IRQ_ROUTING_IRQCHIP;
+ entries[i].u.irqchip.irqchip = 0;
+ entries[i].u.irqchip.pin = i;
+ }
+ ret = kvm_set_irq_routing(kvm, entries, nr, 0);
+ kfree(entries);
+ return ret;
+}
--
1.9.1