STRUCT TEE_IOCTL_SHM_ALLOC_DATA(9)

🌸 NAME 🌸

struct tee_ioctl_shm_alloc_data — the Shared memory allocate argument, bestie 💖

(also hi, welcome to the Kernel API Manual, that's the vibe we're in today ✨)

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✨ SYNOPSIS ✨

struct tee_ioctl_shm_alloc_data {
    __u64 size;
    __u32 flags;
    __s32 id;
 };

Look at her. Three fields. Absolutely iconic, no notes. 🎀

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🫶 Members 🫶

Okay so let's meet the cast 😭

• size — [in/out] Size of shared memory to allocate. She goes in, she comes out, she's booked and busy 💅
• flags — [in/out] Flags to/from allocation. In AND out, main character energy fr fr ✨
• id — [out] Identifier of the shared memory. Purely output-only, she's giving, not taking 👑

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💖 Description 💖

Okay so real talk 🫶 — the flags field should currently be zero as input. Like, zero-zero. Nothing else. Ngl that part matters. Then the call updates it with the actual flags as defined by TEE_IOCTL_SHM_* above (yes, above, go look, iykyk 👀).

And this whole structure? She's used as the argument for TEE_IOC_SHM_ALLOC below. That's literally her job. Periodt. 💅

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🦋 SEE ALSO 🦋

The whole group chat, no cap — Kernel file ./include/uapi/linux/tee.h plus, in order:

• struct tee_ioctl_version_data(9)
• TEE_IOC_VERSION(9)
• TEE_IOC_SHM_ALLOC(9)
• struct tee_ioctl_buf_data(9)
• struct tee_ioctl_param(9)
• struct tee_ioctl_open_session_arg(9)
• TEE_IOC_OPEN_SESSION(9)
• struct tee_ioctl_invoke_arg(9)
• TEE_IOC_INVOKE(9)
• struct tee_ioctl_cancel_arg(9)
• TEE_IOC_CANCEL(9)
• struct tee_ioctl_close_session_arg(9)
• TEE_IOC_CLOSE_SESSION(9)
• struct tee_iocl_supp_recv_arg(9)
• TEE_IOC_SUPPL_RECV(9)
• struct tee_iocl_supp_send_arg(9)
• TEE_IOC_SUPPL_SEND(9)
• struct tee_ioctl_shm_register_data(9)
• struct tee_ioctl_shm_register_fd_data(9)
• TEE_IOC_SHM_REGISTER_FD(9)
• TEE_IOC_SHM_REGISTER(9)
• struct tee_ioctl_object_invoke_arg(9)

Like, that's the entire friend group and they all ate 🔥👑

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bestie this one lives in ./include/uapi/linux and it's dated October 2026 — so like, she's from the future and still slaying 💀💜

okay bye ily, go read the other pages 🧚‍♀️🍓⭐🌈