pci_sriov_configure_simple(9)

✨ pci_sriov_configure_simple ✨

okay bestie, so this is a little helper function from the Kernel API Manual and it's literally the chillest way to turn SR-IOV on and off. let me tell you everything about it 💅

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🌸 SYNOPSIS 🌸

int pci_sriov_configure_simple (struct pci_dev *dev , int nr_virtfn );

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🎀 ARGUMENTS 🎀

• dev — the PCI device, bestie. the main character of this whole operation.
• nr_virtfn — number of virtual functions to enable. and like, pass 0 to disable because sometimes we're in our off-girl era 💀

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🦋 DESCRIPTION 🦋

so basically this function enables or disables SR-IOV for devices that don't require any PF setup before enabling SR-IOV. like, they're low-maintenance. no pre-game ritual needed, they just go ✨

the return value? iconic. it's negative on error (boo 😭), or the number of VFs allocated on success (slay 👑). that's literally the whole vibe check — negative = not it, positive = we ate. periodt.

ngl bestie this is the simple path — if your device needs PF setup first, this is not the function for you, iykyk 🙈

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💖 SEE ALSO 💖

like, go check out the whole crew fr fr — they all live in the kernel file ./drivers/pci/iov.c:

• 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_vfs_assigned(9)
• pci_sriov_set_totalvfs(9)
• pci_sriov_get_totalvfs(9)
• pci_iov_vf_bar_set_size(9)
• pci_iov_vf_bar_get_sizes(9)

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and that's the whole thing bestie, no cap 🫶 this little icon lives over in ./drivers/pci, and the manual's dated October 2026 — so mark your calendar or whatever ⭐ bye bestie, go configure some SR-IOV 💜