公开(公告)号：US12086072B1

公开(公告)日：2024-09-10

申请号：US16816044

申请日：2020-03-11

Applicant: Amazon Technologies, Inc.

Inventor： Daniel John Farrell

IPC: G06F12/00 ,  G06F11/10 ,  G06F12/02 ,  G06F12/1009

CPC classification number: G06F12/1009 ,  G06F11/1044 ,  G06F12/023

Abstract: Vulnerabilities to physical memory, such as server dynamic random access memory (DRAM) with error correction code (ECC) capability, can be mitigated though the use of guard pages allocated in that physical memory. Physical memory pages can be mapped to virtual memory pages of a contiguous virtual address space. When an error such as a bit flip is detected in a physical memory page, the data from that physical memory page can be copied to a protected page, such as a guard page or page isolated from other sensitive data. Information such as an error correction code (ECC) can be used to determine and correct the erroneous bit. The mappings in a related page table can be updated such that the same virtual pages or addresses are then mapped to the guard page that now includes the relevant data.