ibmvmc_send_open(9)

✨ ibmvmc_send_open — Interface Open ✨

okay bestie, so this one is a kernel API page from the Kernel API Manual — yes, the (9) section, we're in the big leagues now 💅 — and it's all about ibmvmc_send_open. Let's get into it, iykyk.

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🌸 SYNOPSIS 🌸

int ibmvmc_send_open (struct ibmvmc_buffer *buffer , struct ibmvmc_hmc
*hmc );

literally the whole signature, no cap. it returns an int and takes two pointers 🫶

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🎀 ARGUMENTS 🎀

• buffer — Pointer to ibmvmc_buffer struct. yes, that struct. she's a pointer, she's out here being passed around 💖
• hmc — Pointer to ibmvmc_hmc struct. also a pointer. iconic behavior from both of them honestly.

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🦋 DESCRIPTION 🦋

okay so picture this: the management partition sends this command as the result of a management partition device request. that's the whole origin story. 🌟

it causes the hypervisor to prepare a set of data buffers for the management application connection indicated by HMC idx. and listen — a unique HMC Idx would be used if multiple management applications running concurrently were desired. so like, one idx per app, slay. 🔥

before responding to this command, the hypervisor must provide the management partition with at least one of these new buffers via the Add Buffer. no skipping this step bestie, it's giving mandatory.

and that's how you know whether the messages are inbound or outbound from the hypervisor. direction check, periodt. 🧚

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⭐ RETURN ⭐

• 0 — Success 🎉
• Non-zero — Failure 😭

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🌈 SEE ALSO 🌈

okay this list is LONG and honestly kind of a flex, so buckle up 🎀

• Kernel file ./drivers/misc/ibmvmc.c
• h_request_vmc(9)
• ibmvmc_handle_event(9)
• ibmvmc_release_crq_queue(9)
• ibmvmc_reset_crq_queue(9)
• crq_queue_next_crq(9)
• ibmvmc_send_crq(9)
• alloc_dma_buffer(9)
• free_dma_buffer(9)
• ibmvmc_get_valid_hmc_buffer(9)
• ibmvmc_get_free_hmc_buffer(9)
• ibmvmc_free_hmc_buffer(9)
• ibmvmc_count_hmc_buffers(9)
• ibmvmc_get_free_hmc(9)
• ibmvmc_return_hmc(9)
• ibmvmc_send_close(9)
• ibmvmc_send_capabilities(9)
• ibmvmc_send_add_buffer_resp(9)
• ibmvmc_send_rem_buffer_resp(9)
• ibmvmc_send_msg(9)
• ibmvmc_open(9)
• ibmvmc_close(9)
• ibmvmc_read(9)
• ibmvmc_poll(9)
• ibmvmc_write(9)
• ibmvmc_setup_hmc(9)
• ibmvmc_ioctl_sethmcid(9)
• ibmvmc_ioctl_query(9)
• ibmvmc_ioctl_requestvmc(9)
• ibmvmc_ioctl(9)
• ibmvmc_add_buffer(9)
• ibmvmc_rem_buffer(9)
• ibmvmc_process_capabilities(9)
• ibmvmc_validate_hmc_session(9)
• ibmvmc_reset(9)
• ibmvmc_reset_task(9)
• ibmvmc_process_open_resp(9)
• ibmvmc_process_close_resp(9)
• ibmvmc_crq_process(9)
• ibmvmc_handle_crq_init(9)
• ibmvmc_handle_crq(9)
• ibmvmc_init_crq_queue(9)

like I said. a whole friend group. 💜

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okay that's the page!! and before you go — this little beauty lives in ./drivers/misc, and she's dated October 2026 📅✨. mwah, go write some kernel code bestie 💖🫶🎀