Facilitating execution of MMIO based instructions

Facilitating execution of MMIO based instructions

A hypervisor of a host receives an indication of an exit from a guest to the hypervisor and a memory-mapped input output (MMIO) address that caused the exit to hypervisor. The hypervisor walks a page table of the guest to identify a guest address associated with the MMIO address that caused the exit...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: Natapov Gleb, Tsirkin Michael
Format: Patent
Sprache:eng
Schlagworte:
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Beschreibung
Zusammenfassung:A hypervisor of a host receives an indication of an exit from a guest to the hypervisor and a memory-mapped input output (MMIO) address that caused the exit to hypervisor. The hypervisor walks a page table of the guest to identify a guest address associated with the MMIO address that caused the exit to the hypervisor. The hypervisor decodes an instruction of the guest referenced by the guest address to determine a type of operation that the guest intended to execute and a location of MMIO information. The hypervisor records, in a page table entry for the MMIO address of a host page table, an association with the type of operation and the location of the MMIO information. The hypervisor executes the operation on behalf of the guest based on the type of the operation and the MMIO information.