KVM: VMX: vmx_set_cr0 expects kvm->srcu locked

vmx_set_cr0 is called from vcpu run context, therefore it expects kvm->srcu to be held (for setting up the real-mode TSS). Signed-off-by: Marcelo Tosatti <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
Findingmyway · Apr 5, 2012 · 7a4f5ad · 7a4f5ad
1 parent fea5295
commit 7a4f5ad
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
@@ -3906,7 +3906,9 @@ static int vmx_vcpu_reset(struct kvm_vcpu *vcpu)
 		vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->vpid);
 
 	vmx->vcpu.arch.cr0 = X86_CR0_NW | X86_CR0_CD | X86_CR0_ET;
+	vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
 	vmx_set_cr0(&vmx->vcpu, kvm_read_cr0(vcpu)); /* enter rmode */
+	srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
 	vmx_set_cr4(&vmx->vcpu, 0);
 	vmx_set_efer(&vmx->vcpu, 0);
 	vmx_fpu_activate(&vmx->vcpu);