Managing translations across multiple contexts using a TLB with entries directed to multiple privilege levels and to multiple types of address spaces

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United States of America Patent

PATENT NO 9330023
SERIAL NO

14297326

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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For a current context in control of a processor requesting access to a particular address, a translation lookaside buffer (TLB) controller specifies a virtual address with a logical partition identifier value indicating a privilege setting of the current context, a process identifier value indicating whether the address is within shared address space, and an effective address comprising at least a portion of the particular address. In response to the virtual address not matching at least one entry within a TLB comprising at least one entry stored for at least one previous translation of at least one previous address, the TLB controller translates the virtual address into a real page number using at least one page table and adding a new entry to the TLB with the virtual address and the real page number, wherein each at least one entry within the TLB identifies a separate privilege setting from among a plurality of privilege settings and a separate indicator of whether the address is within the shared address space.

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Patent Owner(s)

  • INTERNATIONAL BUSINESS MACHINES CORPORATION

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Bybell, Anthony J Cedar Park, US 41 405
Frey, Bradly G Austin, US 47 921
Gschwind, Michael K Chappaqua, US 523 8569
Herrenschmidt, Benjamin Narrabundah, AU 22 726
Mackerras, Paul Weston, AU 16 376

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