Multi-engine address translation facility

US10380032B2 · kind B2 · utility

Assignee

• International Business Machines Corporation · US

Inventors

• Uwe Brandt · Eppelheim, DE
• Markus Helms · Eppelheim, DE
• Christian Jacobi · West Park, US
• Markus Kaltenbach · Holzgerlingen, DE
• Thomas Koehler · Holzgerlingen, DE
• Frank Lehnert · Weil im Schönbuch, DE

Key dates

• Filing date: Mar 9, 2017
• Grant date: Aug 13, 2019
• Expiry date: Oct 13, 2037

Classification

• Technology area (CPC G): Physics
• CPC primary: G06F2212/684
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

An address translation facility is provided for multiple virtualization levels, where a guest virtual address may be translated to a guest non-virtual address, the guest non-virtual address corresponding without translation to a host virtual address, and the host virtual address may be translated to a host non-virtual address, where translation within a virtualization level may be specified as a sequence of accesses to address translation tables. The address translation facility may include a first translation engine and a second translation engine, where the first and second translation engines each have capacity to perform address translation within a single virtualization level of the multiple virtualization levels. In operation, based on the first translation engine performing a guest level translation, the second translation engine may perform a host level translation of a resulting guest non-virtual address to a host non-virtual address based on the guest level translation by the first translation engine.