search for: retry_instruct

...*/ > - kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); > + if (!kvmi_tracked_gfn(vcpu, gpa_to_gfn(gpa))) > + kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); > > /* > * If the access faults on its page table, it can not > @@ -6374,6 +6376,9 @@ static bool retry_instruction(struct x86_emulate_ctxt *ctxt, > if (!vcpu->arch.mmu->direct_map) > gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2, NULL); > > + if (kvmi_tracked_gfn(vcpu, gpa_to_gfn(gpa))) > + return false; > + > kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); > >...

...let CPU execute the instruction. */ - kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); + if (!kvmi_tracked_gfn(vcpu, gpa_to_gfn(gpa))) + kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); /* * If the access faults on its page table, it can not @@ -6374,6 +6376,9 @@ static bool retry_instruction(struct x86_emulate_ctxt *ctxt, if (!vcpu->arch.mmu->direct_map) gpa = kvm_mmu_gva_to_gpa_write(vcpu, cr2, NULL); + if (kvmi_tracked_gfn(vcpu, gpa_to_gfn(gpa))) + return false; + kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); return true;

The KVM introspection subsystem provides a facility for applications running on the host or in a separate VM, to control the execution of other VM-s (pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.), alter the page access bits in the shadow page tables (only for the hardware backed ones, eg. Intel's EPT) and receive notifications when events of interest have taken place

The KVM introspection subsystem provides a facility for applications running on the host or in a separate VM, to control the execution of other VM-s (pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.), alter the page access bits in the shadow page tables (only for the hardware backed ones, eg. Intel's EPT) and receive notifications when events of interest have taken place