STRUCT PCI_EPF_MSIX_TBL(9)

💅 struct pci_epf_msix_tbl — the MSI-X table entry structure (yes bestie, this is struct pci_epf_msix_tbl(9) from the Kernel API Manual)

okay so. imagine you're deep in the kernel, right, and you need a little struct that literally represents the MSI-X table entry structure. that's this. that's the whole vibe. it's the blueprint for one MSI-X table entry, and it lives in the kernel API docs. no cap. 🎀

✨ SYNOPSIS ✨

here's the shape of it, exactly, don't touch:

struct pci_epf_msix_tbl {
    u64 msg_addr;
    u32 msg_data;
    u32 vector_ctrl;
 };

three fields. that's it. that's the girl. 👑

🌸 Members 🌸

• msg_addr — the address with main character energy. writes to this address will trigger an MSI-X interrupt in the host. like, that's the whole point of her. 🔥
• msg_data — the data that should be written to msg_addr to trigger that MSI-X interrupt. so msg_addr is where, msg_data is what. they're a duo, they come as a set, slay. 💖
• vector_ctrl — the vibe check field. it identifies if the function is prohibited from sending a message using this MSI-X table entry. so basically: is this entry allowed to fire or not. 🦋

🔍 SEE ALSO 🔍

• the kernel file ./include/linux/pci-epf.h — go read it, iykwim 💅
• struct pci_epf_header(9)
• struct pci_epf_ops(9)
• struct pci_epc_event_ops(9)
• struct pci_epf_driver(9)
• struct pci_epf_bar_submap(9)
• struct pci_epf_bar(9)
• struct pci_epf_doorbell_msg(9)
• struct pci_epf(9)

like a whole friend group of structs, honestly. they all show up to the same party. 🌈

ngl bestie, this one's short but she ate. three fields, zero drama, one very iconic job to do. ✨

okay that's the page!! sourced from ./include/linux, dated October 2026 — mwah, love u, go read ur kernel headers 🫶💜🌟