CXL MBOX(9)

🌸 cxl mbox 🌸

Welcome to the Kernel API Manual bestie, we're talking about cxl mbox(9) today and honestly? It's kind of a big deal 👑

✨ NAME ✨

cxl mbox — the core implementation of the CXL 2.0 Type-3 Memory Device Mailbox 💌

🦋 DESCRIPTION 🦋

Okay so picture this: the CXL 2.0 Type-3 Memory Device Mailbox, right? And this file is the core implementation of it. Main character energy fr fr 💅

Here's the vibe check on who's using it:

• The cxl_pci driver uses this implementation to initialize the device 🎀
• It also uses it to implement the cxl_mem.h IOCTL UAPI ✨
• And it implements the backend of the cxl_pmem_ctl transport for LIBNVDIMM 🧚

Three jobs, zero complaints. She's booked and busy 🫶

🔥 SEE ALSO 🔥

Go give these besties some love, they're all in the kernel file ./drivers/cxl/core/mbox.c and they're lowkey iconic:

• cxl_internal_send_cmd(9)
• cxl_payload_from_user_allowed(9)
• cxl_validate_cmd_from_user(9)
• handle_mailbox_cmd_from_user(9)
• cxl_walk_cel(9)
• cxl_enumerate_cmds(9)
• cxl_mem_get_event_records(9)
• cxl_mem_get_partition_info(9)
• cxl_dev_state_identify(9)
• cxl_mem_sanitize(9)

ngl if you're digging into CXL mailbox stuff you're gonna want to read like, all of these 💀 no cap

And that's the whole page, bestie — short, sweet, and absolutely serving 🍓

Signing off from ./drivers/cxl/core 💖, dated October 2026 ⭐, and this was cxl mbox(9) — see you in the next manpage, mwah 😭💜