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Editorial Team
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Asked: 2026-05-26T14:02:14+00:00

In x86-64, long mode, do the recent Intel/AMD microprocessors allow TLB to convert virtual

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In x86-64, long mode, do the recent Intel/AMD microprocessors allow TLB to convert virtual to physical addresses of pages 4K, 2MB and 1GB (huge page) at the same time?

As I understand after reading the manuals, it is possible if you set:

bit PDPE.PS=1 in a few records in Page Directory Pointer Table to mark 1GB pages
bit PDPE.PS=0 and PDE.PS=1 in a few records in Page Directory Table to mark 2MB pages
bit PDPE.PS=0 and PDE.PS=0 in a few records in Page Directory Table to mark 4K pages

But I have never tried it, so before I start coding, could you tell me if it will work?

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1 Answer

  1. Editorial Team

    Yes, you can use different sizes at the same time. I think this is just a typo, but your question indicates PDPE.PS=0 and PDE.PS=1 for both the 2MB and 4kB pages. For the 4kB pages, both page size bits should be 0.

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