STRUCT MSI_DEV_DOMAIN(9)

🌸 NAME 🌸

Okay bestie, welcome to struct msi_dev_domain(9) from the Kernel API Manual — and this page is literally about The internals of MSI domain info per device. That's the whole assignment: the inside scoop on MSI domain info for a device. 💅✨

🦋 SYNOPSIS 🦋

       struct msi_dev_domain {
           struct xarray           store;
           struct irq_domain       *domain;
        };

🧚 Members 🧚

• store — Xarray for storing MSI descriptor pointers. 🗂️ It's giving organized-storage energy, no cap.
• domain — Pointer to a per device interrupt domain. 💥 Yes, a pointer, and yes, it's per device.

👀 SEE ALSO 👀

Kernel file ./include/linux/msi.h is right there in the mix, and the whole friend group is:

• struct msi_msg(9)
• struct pci_msi_desc(9)
• union msi_domain_cookie(9)
• struct msi_desc_data(9)
• struct msi_desc(9)
• msi_first_desc(9)
• msi_domain_for_each_desc(9)
• msi_for_each_desc(9)
• msi_msg_set_addr(9)
• msi_insert_msi_desc(9)
• msi_free_msi_descs_range(9)
• msi_free_msi_descs(9)
• struct msi_domain_ops(9)
• struct msi_domain_info(9)
• struct msi_domain_template(9)
• struct msi_parent_ops(9)

That's the page, bestie — source/version: ./include/linux · date: October 2026. Byeee, go slay some kernel reading 🫶💖🎀