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authorChristoffer Dall <christoffer.dall@linaro.org>2014-12-09 16:30:36 +0300
committerChristoffer Dall <christoffer.dall@linaro.org>2014-12-13 16:17:10 +0300
commit1f57be289571d514b9412da2af25a64a81b8dd89 (patch)
treeb851906151ac595f69d762d87b116a7bba781a23
parentc52edf5f8caff878afc93c1b1e9a3d9490a9932f (diff)
downloadlinux-1f57be289571d514b9412da2af25a64a81b8dd89.tar.xz
arm/arm64: KVM: Add (new) vgic_initialized macro
Some code paths will need to check to see if the internal state of the vgic has been initialized (such as when creating new VCPUs), so introduce such a macro that checks the nr_cpus field which is set when the vgic has been initialized. Also set nr_cpus = 0 in kvm_vgic_destroy, because the error path in vgic_init() will call this function, and code should never errornously assume the vgic to be properly initialized after an error. Acked-by: Marc Zyngier <marc.zyngier@arm.com> Reviewed-by: Eric Auger <eric.auger@linaro.org> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
-rw-r--r--include/kvm/arm_vgic.h6
-rw-r--r--virt/kvm/arm/vgic.c3
2 files changed, 8 insertions, 1 deletions
diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h
index 3e262b9bbddf..ac4888dc86bc 100644
--- a/include/kvm/arm_vgic.h
+++ b/include/kvm/arm_vgic.h
@@ -287,6 +287,7 @@ bool vgic_handle_mmio(struct kvm_vcpu *vcpu, struct kvm_run *run,
struct kvm_exit_mmio *mmio);
#define irqchip_in_kernel(k) (!!((k)->arch.vgic.in_kernel))
+#define vgic_initialized(k) (!!((k)->arch.vgic.nr_cpus))
#define vgic_ready(k) ((k)->arch.vgic.ready)
int vgic_v2_probe(struct device_node *vgic_node,
@@ -369,6 +370,11 @@ static inline int irqchip_in_kernel(struct kvm *kvm)
return 0;
}
+static inline bool vgic_initialized(struct kvm *kvm)
+{
+ return true;
+}
+
static inline bool vgic_ready(struct kvm *kvm)
{
return true;
diff --git a/virt/kvm/arm/vgic.c b/virt/kvm/arm/vgic.c
index 4edb2572ea9a..d862ea502167 100644
--- a/virt/kvm/arm/vgic.c
+++ b/virt/kvm/arm/vgic.c
@@ -1780,6 +1780,7 @@ void kvm_vgic_destroy(struct kvm *kvm)
dist->irq_spi_cpu = NULL;
dist->irq_spi_target = NULL;
dist->irq_pending_on_cpu = NULL;
+ dist->nr_cpus = 0;
}
/*
@@ -1793,7 +1794,7 @@ static int vgic_init(struct kvm *kvm)
int nr_cpus, nr_irqs;
int ret, i, vcpu_id;
- if (dist->nr_cpus) /* Already allocated */
+ if (vgic_initialized(kvm))
return 0;
nr_cpus = dist->nr_cpus = atomic_read(&kvm->online_vcpus);