diff options
Diffstat (limited to 'arch/x86/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 43 |
1 files changed, 38 insertions, 5 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 063c07296764..ac4c368afd40 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -6248,20 +6248,53 @@ static void kvm_del_async_pf_gfn(struct kvm_vcpu *vcpu, gfn_t gfn) } } +static int apf_put_user(struct kvm_vcpu *vcpu, u32 val) +{ + + return kvm_write_guest_cached(vcpu->kvm, &vcpu->arch.apf.data, &val, + sizeof(val)); +} + void kvm_arch_async_page_not_present(struct kvm_vcpu *vcpu, struct kvm_async_pf *work) { - trace_kvm_async_pf_not_present(work->gva); - - kvm_make_request(KVM_REQ_APF_HALT, vcpu); + trace_kvm_async_pf_not_present(work->arch.token, work->gva); kvm_add_async_pf_gfn(vcpu, work->arch.gfn); + + if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) || + kvm_x86_ops->get_cpl(vcpu) == 0) + kvm_make_request(KVM_REQ_APF_HALT, vcpu); + else if (!apf_put_user(vcpu, KVM_PV_REASON_PAGE_NOT_PRESENT)) { + vcpu->arch.fault.error_code = 0; + vcpu->arch.fault.address = work->arch.token; + kvm_inject_page_fault(vcpu); + } } void kvm_arch_async_page_present(struct kvm_vcpu *vcpu, struct kvm_async_pf *work) { - trace_kvm_async_pf_ready(work->gva); - kvm_del_async_pf_gfn(vcpu, work->arch.gfn); + trace_kvm_async_pf_ready(work->arch.token, work->gva); + if (is_error_page(work->page)) + work->arch.token = ~0; /* broadcast wakeup */ + else + kvm_del_async_pf_gfn(vcpu, work->arch.gfn); + + if ((vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED) && + !apf_put_user(vcpu, KVM_PV_REASON_PAGE_READY)) { + vcpu->arch.fault.error_code = 0; + vcpu->arch.fault.address = work->arch.token; + kvm_inject_page_fault(vcpu); + } +} + +bool kvm_arch_can_inject_async_page_present(struct kvm_vcpu *vcpu) +{ + if (!(vcpu->arch.apf.msr_val & KVM_ASYNC_PF_ENABLED)) + return true; + else + return !kvm_event_needs_reinjection(vcpu) && + kvm_x86_ops->interrupt_allowed(vcpu); } EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit); |