ARM: KVM: VGIC initialisation code
Add the init code for the hypervisor, the virtual machine, and
the virtual CPUs.
An interrupt handler is also wired to allow the VGIC maintenance
interrupts, used to deal with level triggered interrupts and LR
underflows.
A CPU hotplug notifier is registered to disable/enable the interrupt
as requested.
Reviewed-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c
index 3c8d6a9..ea73832 100644
--- a/arch/arm/kvm/arm.c
+++ b/arch/arm/kvm/arm.c
@@ -642,6 +642,17 @@
vcpu->arch.has_run_once = true;
/*
+ * Initialize the VGIC before running a vcpu the first time on
+ * this VM.
+ */
+ if (irqchip_in_kernel(vcpu->kvm) &&
+ unlikely(!vgic_initialized(vcpu->kvm))) {
+ int ret = kvm_vgic_init(vcpu->kvm);
+ if (ret)
+ return ret;
+ }
+
+ /*
* Handle the "start in power-off" case by calling into the
* PSCI code.
*/
@@ -1085,6 +1096,10 @@
if (err)
goto out_free_vfp;
+#ifdef CONFIG_KVM_ARM_VGIC
+ vgic_present = true;
+#endif
+
kvm_info("Hyp mode initialized successfully\n");
return 0;
out_free_vfp: