msi_device_populate_sysfs(9)

💖 msi_device_populate_sysfs — Kernel API Manual ✨

okay so bestie, welcome to the glow-up of msi_device_populate_sysfs, straight out of the Kernel API Manual. this one's a little cutie: it makes sysfs entries, and we're gonna walk through it together 🎀

---

🌸 NAME 🌸

msi_device_populate_sysfs — populate msi_irqs sysfs entries for a device 💅

like, it literally builds the msi_irqs sysfs entries for your device. that's the vibe.

---

✨ SYNOPSIS ✨

int msi_device_populate_sysfs (struct device *dev );

returns an int, takes one struct device *, slay 🫶

---

🦋 ARGUMENTS 🦋

• dev — the device (PCI, platform etc) which will get sysfs entries 💖

so yeah, bestie, hand it your device — doesn't matter if it's PCI, platform, etc — and it's the one getting the sysfs entries. no cap.

---

👑 SEE ALSO 👑

okay this is the part where the whole friend group gets tagged in the groupchat 😭 it's all in the kernel file ./kernel/irq/msi.c, and honestly the roster is iconic:

• struct msi_device_data(9)
• struct msi_ctrl(9)
• msi_alloc_desc(9)
• msi_domain_insert_msi_desc(9)
• msi_domain_free_msi_descs_range(9)
• msi_domain_add_simple_msi_descs(9)
• msi_setup_device_data(9)
• __msi_lock_descs(9)
• __msi_unlock_descs(9)
• msi_domain_first_desc(9)
• msi_next_desc(9)
• msi_domain_get_virq(9)
• msi_device_destroy_sysfs(9)
• msi_domain_set_affinity(9)
• msi_create_irq_domain(9)
• msi_create_parent_irq_domain(9)
• msi_parent_init_dev_msi_info(9)
• msi_create_device_irq_domain(9)
• msi_remove_device_irq_domain(9)
• msi_match_device_irq_domain(9)
• msi_domain_alloc_irqs_range_locked(9)
• msi_domain_alloc_irqs_range(9)
• msi_domain_alloc_irqs_all_locked(9)
• msi_domain_alloc_irq_at(9)
• msi_device_domain_alloc_wired(9)
• msi_domain_free_irqs_range_locked(9)
• msi_domain_free_irqs_range(9)
• msi_domain_free_irqs_all_locked(9)
• msi_domain_free_irqs_all(9)
• msi_device_domain_free_wired(9)
• msi_get_domain_info(9)
• msi_device_has_isolated_msi(9)

iykyk 🔥 that's the whole squad, not a single one left out 💜

---

ngl, that SEE ALSO list is giving main character energy — go read a few of those if you wanna actually understand the MSI ecosystem 🌈

---

mwah 💋 that's the page! this whole thing lives in ./kernel/irq, it's dated October 2026, and it's filed under msi_device_populate_sysfs(9) — periodt. 🎀🦋💖