Method and system to accelerate address translation

摘要

In a method to accelerate address translation into a physical address, a computer maps a virtual memory area with a large page, the virtual memory area including multiple virtual pages satisfying a predetermined condition and being handled in units of pages, the large page having a larger area than each of the virtual pages, and under a condition in which one of the virtual pages mapped with and included in the large page has a memory protection attribute different from a memory protection attribute of the other virtual page, sets physical memory protection information for protecting a physical page corresponding to the one virtual page having the different memory protection attribute.

主权项

1. A method to accelerate address translation from a virtual address into a physical address by use of a computer having a processing device, the method comprising the steps of:
mapping a virtual memory area with a large page, the virtual memory area including a plurality of virtual pages satisfying a predetermined condition and being handled in units of pages, the large page having a larger area than each of the virtual pages; and under a condition in which one of the virtual pages mapped with and included in the large page has a first memory protection attribute different from and more restrictive than a second memory protection attribute of another virtual page mapped with and included in the large page, setting physical memory protection information for a physical page corresponding to the one virtual page having the first and more restrictive memory protection attribute, wherein the physical memory protection information comprises at least one of an access control bit and a fetch protection bit in a storage key associated with the physical page, for protecting the physical page corresponding to the one virtual page having the first memory protection attribute.