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Memory swapping performance #17

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mmisono opened this issue Jul 27, 2023 · 2 comments
Open
2 tasks

Memory swapping performance #17

mmisono opened this issue Jul 27, 2023 · 2 comments
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@mmisono
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mmisono commented Jul 27, 2023

For swapping:

  • swap out: encrypt data
  • swap in: decrypt data, check integrity, protect from reply attacks

TODO

  • Is swapping supported by SEV-SNP / TDX?
  • How to measure swapping performance?
@rcastellotti
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SEV-SNP supports it, c.f page 12 https://www.amd.com/system/files/TechDocs/SEV-SNP-strengthening-vm-isolation-with-integrity-protection-and-more.pdf

@mmisono
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mmisono commented Jul 28, 2023

So there seems to be the necessary hw feature for swapping but apparently not implemented in the kernel (but this info might be outdated as it was two years ago): AMDESE/AMDSEV#117

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