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...entation/virt/kvm/kvmi.rst @@ -534,6 +534,7 @@ the following events:: KVMI_EVENT_CR KVMI_EVENT_HYPERCALL KVMI_EVENT_TRAP + KVMI_EVENT_XSETBV When an event is enabled, the introspection tool is notified and it must reply with: continue, retry, crash, etc. (see **Events** below). @@ -999,3 +1000,28 @@ took place and the introspection has been enabled for this event ``kvmi_event``, exception/interrupt number (vector), exception code (``error_code``) and CR2 are sent to the introspection tool, which should check if its exception has been injected or overridden. + +7. KVMI_EVENT_XSETBV +--...

The KVM introspection subsystem provides a facility for applications running on the host or in a separate VM, to control the execution of other VMs (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