Speicherschutzschaltung und Speicherschutzverfahren

Details

Veröffentlichungs-Nr.

EP3572967

Aktenzeichen

EP19175067

Anmeldetag

17. Mai 2019

Veröffentlichung

25. August 2021

Erteilung

25. August 2021

Rechtsraum

EP

IPC

G06F21/79G06F9/455G06F9/54G06F12/14// G06F9/50

Abstract

To provide a memory protection circuit and a memory protection method suitable for quick data transfer between a plurality of virtual machines via a common memory, according to an embodiment, a memory protection circuit includes a first ID storing register that stores therein an ID of any of a plurality of virtual machines managed by a hypervisor, an access determination circuit that permits the virtual machine having the ID stored in the first ID storing register to access a memory, a second ID storing register that stores therein an ID of any of the virtual machines, and an ID update control circuit that permits the virtual machine having the ID stored in the second ID storing register to rewrite the ID stored in the first ID storing register.

Anmelder

Firma

Renesas Electronics Corporation

Land

🇯🇵 Japan

Fachgebiete