From mboxrd@z Thu Jan 1 00:00:00 1970 From: eric.auger@linaro.org (Eric Auger) Date: Thu, 4 Dec 2014 10:48:03 +0100 Subject: [PATCH v2 3/4] KVM: arm/arm64: check vgic_initialized before VCPU creation In-Reply-To: <1417686484-20828-1-git-send-email-eric.auger@linaro.org> References: <1417686484-20828-1-git-send-email-eric.auger@linaro.org> Message-ID: <1417686484-20828-4-git-send-email-eric.auger@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 --- 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