x86_init_dev_msi_info(9)

💅 x86_init_dev_msi_info(9) 💅

okay bestie, welcome to the Kernel API Manual ✨ — this is the page for x86_init_dev_msi_info, and honestly? it's giving "small function, big responsibility." let's get into it 🫶

🌸 NAME 🌸

x86_init_dev_msi_info — domain info setup for MSI domains 👑

✨ SYNOPSIS ✨

bool x86_init_dev_msi_info (struct device *dev , struct irq_domain
*domain , struct irq_domain *real_parent , struct msi_domain_info *info
);

🎀 ARGUMENTS 🎀

• dev — the device that the domain should be created for, like, the whole reason we're here 🥰
• domain — the (root) domain that's providing this callback. she's the one making the call 💅
• real_parent — the real parent domain of the domain we're about to initialize. the actual mom, not the stepmom, iykyk 👀
• info — the domain info for the domain we're about to initialize. the paperwork 📄

🦋 DESCRIPTION 🦋

so here's the vibe: this function is to be used for all types of MSI domains above the x86 vector domain and any intermediates. yes, all of them, no exceptions, periodt ✨

and the domain-specific functionality? that gets determined via real_parent. so like, the parent decides the personality, and this function just goes with it 💁‍♀️

🔥 SEE ALSO 🔥

• Kernel file ./arch/x86/kernel/apic/msi.c — go read it, bestie 📖
• pci_dev_has_default_msi_parent_domain(9)
• x86_msi_prepare(9)

and that's the whole page, no cap 🌈 huge shoutout to the source ./arch/x86/kernel/apic and the October 2026 era for making this one happen — mwah, love u, bye 💖🎀🦋