pci_epf_add_vepf(9)

💅 pci_epf_add_vepf — the Kernel API Manual page, bestie edition 👑

okay so this is pci_epf_add_vepf(9) from the Kernel API Manual and it's literally the glow-up moment where a virtual endpoint function gets introduced to its physical bestie 🫶

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✨ NAME ✨

pci_epf_add_vepf — associate a virtual EP function to a physical EP function 🎀

like… matchmaker energy, but for endpoint functions 💖

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🌸 SYNOPSIS 🌸

int pci_epf_add_vepf(struct pci_epf *epf_pf, struct pci_epf *epf_vf);

returns an int, takes two struct pci_epf * pointers, no cap 🧚

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🦋 ARGUMENTS 🦋

• epf_pf — the physical EP function — i.e. the one the virtual EP function should be associated with 👑 (this is the main character that's hosting)
• epf_vf — the virtual EP function that's being added 💫 (this is the one sliding into the group chat)

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💜 DESCRIPTION 💜

so here's the vibe check: a physical endpoint function can be associated with multiple virtual endpoint functions. not just one. multiple. it's giving popular girl with a whole squad 🌈

invoke pci_epf_add_vepf to add a virtual PCI endpoint function to a physical PCI endpoint function. that's it, that's the task, and it absolutely ate 💅

lowkey important: the physical function is the one doing the collecting here, and the virtual one is the one being added. don't mix them up bestie 😭

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🔥 SEE ALSO 🔥

kernel file ./drivers/pci/endpoint/pci-epf-core.c is where the magic lives ✨ and here's the whole friend group, fr fr:

• pci_epf_unbind(9)
• pci_epf_bind(9)
• pci_epf_remove_vepf(9)
• pci_epf_free_space(9)
• pci_epf_alloc_space(9)
• pci_epf_assign_bar_space(9)
• pci_epf_unregister_driver(9)
• __pci_epf_register_driver(9)
• pci_epf_destroy(9)
• pci_epf_create(9)
• pci_epf_align_inbound_addr(9)

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and that's the whole page bestie!! 🌟 this one came from ./drivers/pci/endpoint and it's dated October 2026 — go forth and associate those endpoint functions, ily, mwah 💖🎀🦋