Data memory-dependent prefetcher

A data memory-dependent prefetcher (DMP) is a memory prefetcher that looks at cache memory content for possible pointer values, and prefetches the data at those locations into cache if it sees memory access patterns that suggest following those pointers would be useful.^[1]^[2]

The DMP in Apple's M1 computer architecture was demonstrated to be capable of being used as a memory side-channel in work first reported in 2024.^[3]

References

^ "Augury". www.prefetchers.info. 2022-05-02. Retrieved 2024-03-21.
^ Vicarte, Jose Rodrigo Sanchez; Flanders, Michael; Paccagnella, Riccardo; Garrett-Grossman, Grant; Morrison, Adam; Fletcher, Christopher W.; Kohlbrenner, David (2022-05). "Augury: Using Data Memory-Dependent Prefetchers to Leak Data at Rest". IEEE: 1491–1505. doi:10.1109/SP46214.2022.9833570. ISBN 978-1-6654-1316-9. {{cite journal}}: Check date values in: |date= (help); Cite journal requires |journal= (help)
^ Goodin, Dan (2024-03-21). "Unpatchable vulnerability in Apple chip leaks secret encryption keys". Ars Technica. Retrieved 2024-03-21.

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[1] "Augury". www.prefetchers.info. 2022-05-02. Retrieved 2024-03-21.

[2] Vicarte, Jose Rodrigo Sanchez; Flanders, Michael; Paccagnella, Riccardo; Garrett-Grossman, Grant; Morrison, Adam; Fletcher, Christopher W.; Kohlbrenner, David (2022-05). "Augury: Using Data Memory-Dependent Prefetchers to Leak Data at Rest". IEEE: 1491–1505. doi:10.1109/SP46214.2022.9833570. ISBN 978-1-6654-1316-9. {{cite journal}}: Check date values in: |date= (help); Cite journal requires |journal= (help)

[3] Goodin, Dan (2024-03-21). "Unpatchable vulnerability in Apple chip leaks secret encryption keys". Ars Technica. Retrieved 2024-03-21.

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