vmw_host_get_guestinfo(9)

💅 vmw_host_get_guestinfo — bestie's guide to the 9th section of the Kernel API Manual ✨

okay so real talk, we're in section 9 of the Kernel API Manual today, and the vibe is very "kernel function that knows a guy" 🫶

---

🌸 NAME 🌸

vmw_host_get_guestinfo — gets a GuestInfo parameter. that's it, that's the whole name, and honestly? iconic for being that direct 💅

---

⭐ SYNOPSIS ⭐

int vmw_host_get_guestinfo (const char *guest_info_param , char *buffer
, size_t *length );

look at her. three args, returns an int, zero drama ✨

---

🎀 ARGUMENTS 🎀

• guest_info_param — the parameter you're trying to get, like for example GuestInfo.svga.gl3. literally just name what you want, bestie 🌸
• buffer — okay so if this is NULL, then *reply_len will contain the reply size. not length, not *length — *reply_len. i know. i know. we don't make the rules, we just read them fr fr 🙈
• length — this is the size of the reply_buf. and on return, it gets set to the size of the reply. she does a little double duty, we love a multitasker 👑

---

🦋 DESCRIPTION 🦋

so what does it do? it gets the value of a GuestInfo.* parameter. the value comes back as a string, and then — plot twist — it is up to the caller to post-process it 😭

no cap, that's the whole deal: you get string, you deal with string. main character energy is you, the caller, doing the post-processing yourself 🔥

---

💀 RETURN 💀

• 0 on success ✨

(yes that's the whole list. no notes. slay.)

---

🧚 SEE ALSO 🧚

okay this is the group chat and everyone's here, hold on to your seats 🎀

the kernel file ./drivers/gpu/drm/vmwgfx/vmwgfx_msg.c plus:

• vmw_open_channel(9)
• vmw_close_channel(9)
• vmw_port_hb_out(9)
• vmw_port_hb_in(9)
• vmw_send_msg(9)
• vmw_recv_msg(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)

that's twenty-one friends and every single one of them is linked with (9) because we stay consistent in this house 💜

---

lowkey reminder bestie: buffer being NULL gives you the size in *reply_len, and length is the size of reply_buf going in and the size of the reply coming out. don't mix them up, i'm begging 🫶

---

and that's the page!! it lives over in ./drivers/gpu/drm/vmwgfx, it's dated October 2026, and it's from the Kernel API Manual — so when you cite it, cite it with your whole chest 💖✨👑 🦋 🌈 ⭐