STRUCT TEE_IOCTL_SHM_REGISTER_DATA(9)

💖 NAME 💖

okay so bestie, this page is from the Kernel API Manual, and today we're decoding struct tee_ioctl_shm_register_data (section 9) — literally the Shared memory register argument 💅✨.

✨ SYNOPSIS ✨

       struct tee_ioctl_shm_register_data {
           __u64 addr;
           __u64 length;
           __u32 flags;
           __s32 id;
        };

🎀 Members 🎀

• addr — [in] Start address of shared memory to register. that's the starting-address vibe 🫶
• length — [in/out] Length of shared memory to register. in and out, she contains multitudes.
• flags — [in/out] Flags to/from registration. yes, to AND from, iconic.
• id — [out] Identifier of the shared memory. your little shm ID, slay 💅

🦋 Description 🦋

So here's the tea: the flags field should currently be zero as input. Updated by the call with actual flags as defined by TEE_IOCTL_SHM_* above. This structure is used as argument for TEE_IOC_SHM_REGISTER below.

bestie, fr fr: flags should currently be zero as input — that's the vibe check. It gets updated by the call with the actual flags as defined by TEE_IOCTL_SHM_* above. No cap. 🫶

🌈 SEE ALSO 🌈

Kernel file ./include/uapi/linux — and the whole linked bestie crew:

• struct tee_ioctl_version_data(9)
• TEE_IOC_VERSION(9)
• struct tee_ioctl_shm_alloc_data(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_fd_data(9)
• TEE_IOC_SHM_REGISTER_FD(9)
• TEE_IOC_SHM_REGISTER(9)
• struct tee_ioctl_object_invoke_arg(9)

that's the whole page, bestie! source/version: ./include/uapi/linux · date: October 2026 🫶💖✨