Controlling access to pages in a memory in a computing device
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United States of America Patent
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Mar 26, 2019
Grant Date -
Feb 1, 2018
app pub date -
Jan 27, 2017
filing date -
Jul 29, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
A table walker receives, from a requesting entity, a request to translate a first address into a second address associated with a page of memory. During a corresponding table walk, when a lock indicator in an entry in a reverse map table (RMT) for the page is set to mark the entry in the RMT as locked, the table walker halts processing the request and performs a remedial action. In addition, when the request is associated with a write access of the page and an immutable indicator in the entry in the RMT is set to mark the page as immutable, the table walker halts processing the request and performs the remedial action. Otherwise, when the entry in the RMT is not locked and the page is not marked as immutable for a write access, the table walker continues processing the request.
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