[PATCH v2 3/4] KVM: arm/arm64: check vgic_initialized before VCPU creation

Eric Auger
2014-12-04T09:50:52Z

Now that user-space can initiate VGIC initialization independently
on the first vcpu run, let's check the user-space does not attempt
to create a VCPU after this initialization.

Signed-off-by: Eric Auger <eric.auger@linaro.org>
---
arch/arm/kvm/arm.c | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c
index b5401f7..edcc66b 100644
--- a/arch/arm/kvm/arm.c
+++ b/arch/arm/kvm/arm.c
@@ -216,6 +216,11 @@ struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
int err;
struct kvm_vcpu *vcpu;

+ if (unlikely(vgic_initialized(kvm))) {
+ err = -EBUSY;
+ goto out;
+ }
+
vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
if (!vcpu) {
err = -ENOMEM;
--
1.9.1