[PATCH v4 5/5] ARM: KVM: arch_timers: Wire the init code and config option

[Christoffer Dall]

From: Marc Zyngier <marc.zyngier at arm.com>

It is now possible to select CONFIG_KVM_ARM_TIMER to enable the
KVM architected timer support.

Signed-off-by: Marc Zyngier <marc.zyngier at arm.com>
Signed-off-by: Christoffer Dall <c.dall at virtualopensystems.com>
---
 arch/arm/kvm/Kconfig  |    7 +++++++
 arch/arm/kvm/Makefile |    1 +
 arch/arm/kvm/arm.c    |   11 +++++++++++
 arch/arm/kvm/vgic.c   |    1 +
 4 files changed, 20 insertions(+)

diff --git a/arch/arm/kvm/Kconfig b/arch/arm/kvm/Kconfig
index 3c979ce..eaecb9f 100644
--- a/arch/arm/kvm/Kconfig
+++ b/arch/arm/kvm/Kconfig
@@ -58,6 +58,13 @@ config KVM_ARM_VGIC
 	---help---
 	  Adds support for a hardware assisted, in-kernel GIC emulation.
 
+config KVM_ARM_TIMER
+        bool "KVM support for Architected Timers"
+	depends on KVM_ARM_VGIC && ARM_ARCH_TIMER
+	select HAVE_KVM_IRQCHIP
+	---help---
+	  Adds support for the Architected Timers in virtual machines
+
 source drivers/virtio/Kconfig
 
 endif # VIRTUALIZATION
diff --git a/arch/arm/kvm/Makefile b/arch/arm/kvm/Makefile
index c019f02..7c5a635 100644
--- a/arch/arm/kvm/Makefile
+++ b/arch/arm/kvm/Makefile
@@ -21,3 +21,4 @@ obj-$(CONFIG_KVM_ARM_HOST) += $(addprefix ../../../virt/kvm/, kvm_main.o coalesc
 obj-$(CONFIG_KVM_ARM_HOST) += arm.o guest.o mmu.o emulate.o reset.o
 obj-$(CONFIG_KVM_ARM_HOST) += coproc.o coproc_a15.o mmio.o decode.o
 obj-$(CONFIG_KVM_ARM_VGIC) += vgic.o
+obj-$(CONFIG_KVM_ARM_TIMER) += timer.o
diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c
index 8cdef69..e62ba49 100644
--- a/arch/arm/kvm/arm.c
+++ b/arch/arm/kvm/arm.c
@@ -286,6 +286,7 @@ out:
 void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
 {
 	kvm_mmu_free_memory_caches(vcpu);
+	kvm_timer_vcpu_terminate(vcpu);
 	kmem_cache_free(kvm_vcpu_cache, vcpu);
 }
 
@@ -323,6 +324,9 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
 	/* Set up VGIC */
 	kvm_vgic_vcpu_init(vcpu);
 
+	/* Set up the timer */
+	kvm_timer_vcpu_init(vcpu);
+
 	return 0;
 }
 
@@ -1048,6 +1052,13 @@ static int init_hyp_mode(void)
 	if (!err)
 		vgic_present = true;
 
+	/*
+	 * Init HYP architected timer support
+	 */
+	err = kvm_timer_hyp_init();
+	if (err)
+		goto out_free_mappings;
+
 	return 0;
 out_free_vfp:
 	free_percpu(kvm_host_vfp_state);
diff --git a/arch/arm/kvm/vgic.c b/arch/arm/kvm/vgic.c
index 146de1d..090ea79 100644
--- a/arch/arm/kvm/vgic.c
+++ b/arch/arm/kvm/vgic.c
@@ -1168,6 +1168,7 @@ int kvm_vgic_init(struct kvm *kvm)
 	for (i = 32; i < VGIC_NR_IRQS; i += 4)
 		vgic_set_target_reg(kvm, 0, i);
 
+	kvm_timer_init(kvm);
 	kvm->arch.vgic.ready = true;
 out:
 	mutex_unlock(&kvm->lock);