pci_msi_domain_write_msg(9)

💅 pci_msi_domain_write_msg — the Kernel API Manual page your group chat has been waiting for

okay so picture this: it's Kernel API Manual o'clock, the function is called pci_msi_domain_write_msg, and it's literally just a lil helper bestie whose whole job is writing the MSI message into PCI config space. that's it. that's the gig. main character energy but make it a helper function 🎀

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✨ NAME ✨

pci_msi_domain_write_msg — the helper that writes the MSI message into PCI config space. no cap, that's the whole vibe 🦋

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🌸 SYNOPSIS 🌸

void pci_msi_domain_write_msg (struct irq_data *irq_data , struct
       msi_msg *msg );

like, look at her. two args, returns nothing (void, she gives nothing back and honestly? iconic). 💅

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🫶 ARGUMENTS 🫶

• irq_data — pointer to the interrupt data of the MSI interrupt 🧚 so like, the interrupt data, for the MSI interrupt. she knows who she is.
• msg — pointer to the message 📨 that's the message. the one getting written. periodt.

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🔥 SEE ALSO 🔥

• Kernel file ./drivers/pci/msi/irqdomain.c — go read the source bestie, it's all there 👀
• pci_setup_msi_device_domain(9)
• pci_setup_msix_device_domain(9)
• pci_msi_domain_supports(9)
• pci_msi_domain_get_msi_rid(9)
• pci_msi_map_rid_ctlr_node(9)
• pci_msi_get_device_domain(9)

like, the whole friend group fr fr 🌈 pull up on any of these and you'll be fine.

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no warnings on this one bestie, she's a helper, she's chill, she's just doing her little write 🍓

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and that's the whole page! sourced straight from ./drivers/pci/msi, dated October 2026, and yes the header on top and the footer on the bottom both said pci_msi_domain_write_msg(9) — we been knew 💖 mwah, go write some MSI messages, ily, bye! 👑