STRUCT RPMSG_HDR(9)

Hey bestie! 💖 Welcome to the struct rpmsg_hdr(9) page from the Kernel API Manual. It’s giving “common header for all rpmsg messages,” and honestly? Iconic. 🎀

💖 NAME 💖

struct rpmsg_hdr — the common header for all rpmsg messages. That’s the name, and it ate. 👑

✨ SYNOPSIS ✨

       struct rpmsg_hdr {
           __rpmsg32 src;
           __rpmsg32 dst;
           __rpmsg32 reserved;
           __rpmsg16 len;
           __rpmsg16 flags;
           u8 data[];
        };

🎀 Members 🎀

• src — source address, aka where the message is coming from 👀
• dst — destination address, aka where it’s headed 🎯
• reserved — reserved for future use, so hands off for now 🙈
• len — length of payload (in bytes), the size tea ☕
• flags — message flags, little status markers 🚩
• data — len bytes of message payload data, the actual content bestie 💌

🦋 Description 🦋

Every message sent(/received) on the rpmsg bus begins with this header. Periodt. It’s the common starting point, no cap. 🦋✨

🌈 SEE ALSO 🌈

Go check these besties for the full lore 👑

• Kernel file ./drivers/rpmsg/virtio_rpmsg_bus.c
• struct virtproc_info(9)
• struct virtio_rpmsg_channel(9)
• rpmsg_sg_init(9)
• __ept_release(9)
• __rpmsg_destroy_ept(9)
• rpmsg_send_offchannel_raw(9)

Okay that’s the tea ☕ — source/version is ./drivers/rpmsg, date is October 2026, and the manual name is Kernel API Manual. Byeee bestie, go slay those rpmsg messages 💖✨