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Diffstat (limited to 'arch/x86/kvm/x86.c')
-rw-r--r--arch/x86/kvm/x86.c43
1 files changed, 38 insertions, 5 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 063c072..ac4c368 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);