Displaying 4 results from an estimated 4 matches for "retry_instruction".
2019 Sep 10
1
[RFC PATCH v6 69/92] kvm: x86: keep the page protected if tracked by the introspection tool
...*/
> - 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));
>
> r...
2019 Aug 09
0
[RFC PATCH v6 69/92] kvm: x86: keep the page protected if tracked by the introspection tool
...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;
2019 Aug 09
117
[RFC PATCH v6 00/92] VM introspection
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
2019 Aug 09
117
[RFC PATCH v6 00/92] VM introspection
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