pci_msi_domain_supports(9)

💖 pci_msi_domain_supports(9) 💖

okay bestie, this is straight from the Kernel API Manual, and it's literally the page for pci_msi_domain_supports(9) — the vibe check for whether a particular feature flag is supported. no cap, let's get into it. 🫶

✨ NAME ✨

pci_msi_domain_supports — Check for support of a particular feature flag. that's the whole assignment, and it ate. 💅

🌸 SYNOPSIS 🌸

bool pci_msi_domain_supports (struct pci_dev *pdev , unsigned int
       feature_mask , enum support_mode mode );

yes, copy it exactly — the signature is iconic, space before the comma and all. 🎀

💅 ARGUMENTS 💅

• pdev — The PCI device to operate on. main character device energy, obviously. 👑
• feature_mask — The feature mask to check for (full match). not a partial-match situation, bestie — full match only. 🔥
• mode — If ALLOW_LEGACY this grants the feature when there is no irq domain associated to the device. If DENY_LEGACY the lack of an irq domain makes the feature unsupported. that's the whole mood. 💀

🦋 SEE ALSO 🦋

• Kernel file ./drivers/pci/msi/irqdomain.c — yes, that one. 📁
• pci_msi_domain_write_msg(9)
• pci_setup_msi_device_domain(9)
• pci_setup_msix_device_domain(9)
• pci_msi_domain_get_msi_rid(9)
• pci_msi_map_rid_ctlr_node(9)
• pci_msi_get_device_domain(9)

all the linked besties, no gatekeeping. 🌈

🫶 okay that's the page, bestie — footer energy is source/version ./drivers/pci/msi, dated October 2026, and it's giving Kernel API Manual the whole time. periodt. 💖