microsoft / microsoft/openvmm

Document the DMA Manager and OpenHCL memory model

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#2,940 0 comments 0 reactions 1 assignee View on GitHub

@chris-oo is already working on this.

Since Mar 11, 2026.

documentation storage
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Description

Memory model:

  • VTL2 Memory allocation modes
  • VTL2 MMIO space, and gap(s)
  • Memory types (private pool, shared pool, etc.) + sizing heuristics (@mattkur to fill in docs on heuristics)
  • How VTL2 accesses the VTL0 memory

DMA manager:

  • Client (e.g. nvme, mana drivers) expectiations
  • What it is, and general purpose

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