CXL CORE HDM(9)

💖 cxl core hdm(9) 💖

(okay bestie, this one's from the Kernel API Manual — yes, we're in kernel-internals territory 🫶)

🌸 NAME 🌸

cxl core hdm

✨ DESCRIPTION ✨

okay so Compute Express Link Host Managed Device Memory — starting with the CXL 2.0 specification, no cap — is managed by an array of HDM Decoder register instances per CXL port and per CXL endpoint. This page is literally here to define common helpers for enumerating these registers and capabilities. That's the whole vibe: registers, capabilities, enumeration helpers. 💅

🦋 SEE ALSO 🦋

• Kernel file ./drivers/cxl/core/hdm.c
• devm_cxl_setup_hdm(9)
• request_skip(9)
• devm_cxl_enumerate_decoders(9)
• devm_cxl_switch_port_decoders_setup(9)
• devm_cxl_endpoint_decoders_setup(9)

that's the tea, bestie 🍓 source/version: ./drivers/cxl/core, dated October 2026. mwah 💋