vmw_recv_msg(9)

💌 vmw_recv_msg — from the Kernel API Manual, with love

Okay so bestie, picture this: you're deep in the kernel, hanging out in ./drivers/gpu/drm/vmwgfx, and the host has something to tell you. That's literally what this function is for. It's the "hey, I got a message for you" function. Iconic behavior, honestly. 🎀

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✨ NAME ✨

vmw_recv_msg — receives a message from the host 🦋

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🌸 SYNOPSIS 🌸

int vmw_recv_msg (struct rpc_channel *channel , void **msg , size_t
*msg_len );

Yeah, that's the whole vibe. Returns an int, takes three things. Slay. 💅

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💖 ARGUMENTS 💖

• channel — the channel, opened by vmw_open_channel. Like, you gotta have the channel first, no cap. 🔑
• msg — [OUT] — the message received from the host. It's an output param, so this is where the tea gets delivered. 🍓
• msg_len — the message length. Gotta know how long the message is, obviously. size_t *, because we're not animals. ✨

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⚠️ NOTE ⚠️

Bestie, listen. It is the caller's responsibility to call kfree on msg. Not the function's. Yours. So don't just walk away and let it leak — that's not main character energy, that's a memory leak. 😭 kfree it. Periodt. 💀

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👑 SEE ALSO 👑

Kernel file: ./drivers/gpu/drm/vmwgfx/vmwgfx_msg.c — go read it, it's giving lore. 🌈

And the whole friend group:

• vmw_open_channel(9)
• vmw_close_channel(9)
• vmw_port_hb_out(9)
• vmw_port_hb_in(9)
• vmw_send_msg(9)
• vmw_host_get_guestinfo(9)
• vmw_host_printf(9)
• vmw_msg_ioctl(9)
• reset_ppn_array(9)
• hypervisor_ppn_reset_all(9)
• hypervisor_ppn_add(9)
• hypervisor_ppn_remove(9)
• mksstat_init_record_time(9)
• mksstat_init_kern_id(9)
• vmw_mksstat_get_kern_slot(9)
• vmw_mksstat_cleanup_descriptor(9)
• vmw_mksstat_remove_all(9)
• vmw_mksstat_reset_ioctl(9)
• vmw_mksstat_add_ioctl(9)
• vmw_mksstat_remove_ioctl(9)
• vmw_disable_backdoor(9)

Like, that's the whole squad. Go say hi. 🫶🔥

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Anyway, that's the page! Huge thanks to the source at ./drivers/gpu/drm/vmwgfx, and this lil gem is dated October 2026. Catch you in the next manpage, bestie — mwah! 💜🧚⭐