pci_vfs_assigned(9)

hey bestie, welcome to pci_vfs_assigned(9) from the Kernel API Manual — we're doing VF math and it's giving kernel-core cute. 🫶

🎀 NAME 🎀

pci_vfs_assigned — returns the number of VFs that are assigned to a guest. That's it. That's the function. iconic. ✨

✨ SYNOPSIS ✨

int pci_vfs_assigned (struct pci_dev *dev );

🌸 ARGUMENTS 🌸

• dev — the PCI device. Literally the PCI device, bestie; that's the whole input. 💅

🦋 DESCRIPTION 🦋

So it returns the number of VFs belonging to this device that are assigned to a guest. Easy. Slay.

If the device is not a physical function, it returns 0. No cap.

Heads up: not a physical function = 0. That's the rule, and the function is sticking to it. 💀

🌈 SEE ALSO 🌈

Kernel file ./drivers/pci/iov.c is the home base, and the whole linked-page squad is:

• pci_iov_get_pf_drvdata(9)
• pci_iov_init(9)
• pci_iov_release(9)
• pci_iov_remove(9)
• pci_iov_update_resource(9)
• pci_sriov_resource_alignment(9)
• pci_restore_iov_state(9)
• pci_vf_drivers_autoprobe(9)
• pci_iov_bus_range(9)
• pci_enable_sriov(9)
• pci_disable_sriov(9)
• pci_num_vf(9)
• pci_sriov_set_totalvfs(9)
• pci_sriov_get_totalvfs(9)
• pci_sriov_configure_simple(9)
• pci_iov_vf_bar_set_size(9)
• pci_iov_vf_bar_get_sizes(9)

Cute sign-off: source ./drivers/pci, version/date October 2026, page pci_vfs_assigned(9) — mwah, bye bestie 💋🎀