NE_ERR_INVAL..._REGION_SIZE(9)

💜 NE_ERR_INVALID_MEM_REGION_SIZE 💜

okay bestie, so this is a page out of the Kernel API Manual — like, section 9, kernel developer stuff — and the star of the show is NE_ERR_INVALID_MEM_REGION_SIZE. no cap, that's the whole vibe of this page. 🫶

---

✨ NAME ✨

NE_ERR_INVALID_MEM_REGION_SIZE — literally the error that says your user space memory region size is not a multiple of 2 MiB. that's it, that's the whole thing. 💅

---

🌸 SYNOPSIS 🌸

it's giving "just the name, nothing else":

NE_ERR_INVALID_MEM_REGION_SIZE

like, no arguments, no flags, no parameters. she simply is. iconic. 🎀

---

🦋 SEE ALSO 🦋

okay this is the part where we list literally everyone in the group chat, and ngl it's a long one — but every single one of these is important, so let's go 🔥

the source file, front and center:

• Kernel file ./include/uapi/linux/nitro_enclaves.h — this is where it all lives, bestie 🗂️

the main character docs:

• Nitro Enclaves (NE) Kernel Driver Interface(9)
• NE_CREATE_VM(9)
• NE_ADD_VCPU(9)
• NE_GET_IMAGE_LOAD_INFO(9)
• NE_SET_USER_MEMORY_REGION(9)
• NE_START_ENCLAVE(9)
• NE specific error codes(9)

the error-code gang (we stan a whole squad): 💀

• NE_ERR_VCPU_ALREADY_USED(9)
• NE_ERR_VCPU_NOT_IN_CPU_POOL(9)
• NE_ERR_VCPU_INVALID_CPU_CORE(9)
• NE_ERR_INVALID_MEM_REGION_ADDR(9)
• NE_ERR_UNALIGNED_MEM_REGION_ADDR(9)
• NE_ERR_MEM_REGION_ALREADY_USED(9)
• NE_ERR_MEM_NOT_HUGE_PAGE(9)
• NE_ERR_MEM_DIFFERENT_NUMA_NODE(9)
• NE_ERR_MEM_MAX_REGIONS(9)
• NE_ERR_NO_MEM_REGIONS_ADDED(9)
• NE_ERR_NO_VCPUS_ADDED(9)
• NE_ERR_ENCLAVE_MEM_MIN_SIZE(9)
• NE_ERR_FULL_CORES_NOT_USED(9)
• NE_ERR_NOT_IN_INIT_STATE(9)
• NE_ERR_INVALID_VCPU(9)
• NE_ERR_NO_CPUS_AVAIL_IN_POOL(9)
• NE_ERR_INVALID_PAGE_SIZE(9)
• NE_ERR_INVALID_FLAG_VALUE(9)
• NE_ERR_INVALID_ENCLAVE_CID(9)

flags + structs, the supporting cast ✨:

• Image load info flags(9)
• NE_EIF_IMAGE(9)
• struct ne_image_load_info(9)
• User memory region flags(9)
• NE_DEFAULT_MEMORY_REGION(9)
• struct ne_user_memory_region(9)
• Enclave start info flags(9)
• NE_ENCLAVE_PRODUCTION_MODE(9)
• NE_ENCLAVE_DEBUG_MODE(9)
• struct ne_enclave_start_info(9)

---

lowkey a reminder: this page is short on purpose — the actual detail lives in the pages above, so go read them if you want the full tea. ☕

---

and that's the whole page, bestie!! 🌈✨ this lil drop comes to you from ./include/uapi/linux, dated October 2026, and it answers to the name NE_ERR_INVAL..._REGION_SIZE(9) — one more time for the people in the back 💅💖