msi_msg_set_addr(9)

hii bestie!! welcome to msi_msg_set_addr(9), straight out of the Kernel API Manual 🫶 this one is short and sweet, ngl — it's literally about setting the MSI address in an MSI message. Let's get into it 💅

💖 NAME 💖

msi_msg_set_addr — Set MSI address in an MSI message ✨

✨ SYNOPSIS ✨

       void msi_msg_set_addr (struct msi_desc *desc , struct msi_msg *msg ,
       phys_addr_t msi_addr );

🎀 ARGUMENTS 🎀

• desc — the MSI descriptor that may carry an IOVA base address for MSI via iommu_msi_iova/shift 🧚
• msg — the target MSI message; set its address_hi and address_lo 💅
• msi_addr — the physical address to set the MSI message 🌸

💅 NOTES 💅

• Override msi_addr using the IOVA base address in the desc if iommu_msi_shift is set 👑
• Otherwise, simply set msi_addr to msg 🫶

🌈 SEE ALSO 🌈

Kernel file ./include/linux/msi.h — and the whole reference crew is here, no cap:

• struct msi_msg(9)
• struct pci_msi_desc(9)
• union msi_domain_cookie(9)
• struct msi_desc_data(9)
• struct msi_desc(9)
• struct msi_dev_domain(9)
• msi_first_desc(9)
• msi_domain_for_each_desc(9)
• msi_for_each_desc(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 whole page, bestie!! source/version vibes: ./include/linux; date on the page: October 2026; and the page itself is msi_msg_set_addr(9) 🎀✨ slay, you got this 💖