KVM: async_pf: Force a nested vmexit if the injected #PF is async_pf

[mirror_ubuntu-artful-kernel.git] / arch / x86 / kvm / x86.c

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index e149c92476f14807049bf07db2ba027e444b4718..f3f10154c1339723cea0ce29bde25fa90550c4f9 100644 (file)
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -450,7 +450,12 @@ EXPORT_SYMBOL_GPL(kvm_complete_insn_gp);
 void kvm_inject_page_fault(struct kvm_vcpu *vcpu, struct x86_exception *fault)
 {
        ++vcpu->stat.pf_guest;
-       vcpu->arch.cr2 = fault->address;
+       vcpu->arch.exception.nested_apf =
+               is_guest_mode(vcpu) && fault->async_page_fault;
+       if (vcpu->arch.exception.nested_apf)
+               vcpu->arch.apf.nested_apf_token = fault->address;
+       else
+               vcpu->arch.cr2 = fault->address;
        kvm_queue_exception_e(vcpu, PF_VECTOR, fault->error_code);
 }
 EXPORT_SYMBOL_GPL(kvm_inject_page_fault);
@@ -8582,6 +8587,7 @@ void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu,
                fault.error_code = 0;
                fault.nested_page_fault = false;
                fault.address = work->arch.token;
+               fault.async_page_fault = true;
                kvm_inject_page_fault(vcpu, &fault);
        }
 }
@@ -8604,6 +8610,7 @@ void kvm_arch_async_page_present(struct kvm_vcpu *vcpu,
                fault.error_code = 0;
                fault.nested_page_fault = false;
                fault.address = work->arch.token;
+               fault.async_page_fault = true;
                kvm_inject_page_fault(vcpu, &fault);
        }
        vcpu->arch.apf.halted = false;