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

Christoffer Dall
2012-09-15T15:39:49Z

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

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com>
---
arch/arm/kvm/Kconfig | 7 +++++++
arch/arm/kvm/Makefile | 1 +
arch/arm/kvm/arm.c | 11 +++++++++++
arch/arm/kvm/vgic.c | 4 ++++
4 files changed, 23 insertions(+)

diff --git a/arch/arm/kvm/Kconfig b/arch/arm/kvm/Kconfig
index 867551e..ade2673 100644
--- a/arch/arm/kvm/Kconfig
+++ b/arch/arm/kvm/Kconfig
@@ -47,6 +47,13 @@ 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 0917695..916c1eb 100644
--- a/arch/arm/kvm/Makefile
+++ b/arch/arm/kvm/Makefile
@@ -20,3 +20,4 @@ obj-$(CONFIG_KVM_ARM_HOST) += $(addprefix ../../../virt/kvm/, kvm_main.o coalesc

obj-$(CONFIG_KVM_ARM_HOST) += arm.o guest.o mmu.o emulate.o reset.o coproc.o
obj-$(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 af71560..45b4dc3 100644
--- a/arch/arm/kvm/arm.c
+++ b/arch/arm/kvm/arm.c
@@ -285,6 +285,7 @@ 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);
}

@@ -316,6 +317,9 @@ 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;
}

@@ -1016,6 +1020,13 @@ 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 63fe0dd..494d94d 100644
--- a/arch/arm/kvm/vgic.c
+++ b/arch/arm/kvm/vgic.c
@@ -1111,5 +1111,9 @@ int kvm_vgic_init(struct kvm *kvm)

out:
mutex_unlock(&kvm->lock);
+
+ if (!ret)
+ kvm_timer_init(kvm);
+
return ret;
}