System requirements

BIOS configuration

AMD platforms

• SPM(Special Purpose Memory) configuration

  AMD CBS → CXL Common Options → CXL Memory Attribute : Enabled
  Warning
  If disabled, the CXL memory lacks EFI_MEMORY_SP attribute, causing the OS to boot it as standard system-ram(CPU-less NUMA node via SRAT).
  Once it is integrated into system memory, it cannot be reconfigured to DAX.

• Use CPU address space

  AMD CBS → CXL Common Options → CXL Physical Addressing : System address
  Warning
  If not set to System address, a mismatch between SPA(System Physical Address) and HPA(Host Physical Address) occurs.
  It prevents the HDM(Host-managed Device Memory) Decoder from validating the memory range, making it impossible to create CXL Region.
  Without a valid region, the memory cannot be assigned to DAX.

• Enable MSI multi vector

  AMD CBS → NBIO Common Options → IOMMU/Security → IOMMU : Enabled
  Warning
  If disabled, Interrupt Remapping is unavailable, limiting the CXL device to a single MSI vector.
  But our device is using multi vector MSI, so it should be enabled.

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OS

• Ubuntu 24.04.3 LTS

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Required APT packages

build-essential cmake ninja-build wget
python3-dev python3-pip python3-venv libncurses6
libglib2.0-0 libslirp0 liburing2 libcurl3-gnutls

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Required Python packages

numpy tomli capstone cxxfilt pyelftools

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Docker

• Optional, recommended for consistent build environments

  Note
  For non-Ubuntu systems, it is recommended to use the official Docker image to ensure full compatibility.