hv_allocate_config_window(9)

🦋 hv_allocate_config_window(9) 🦋

hiii bestie 💖 welcome to the Kernel API Manual page for hv_allocate_config_window(9). It's giving official kernel-doc energy, but make it group chat. We're gonna keep every literal detail, bestie — no cap, no skipping 🫶

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✨ NAME ✨

hv_allocate_config_window — Find MMIO space for PCI Config 💅

🎀 SYNOPSIS 🎀

int hv_allocate_config_window (struct hv_pcibus_device *hbus );

🌸 ARGUMENTS 🌸

• hbus — the root PCI bus, as understood by this driver. That's the whole argument, bestie; she's simple and iconic.

💜 DESCRIPTION 💜

okay so this function claims memory-mapped I/O space for accessing configuration space for the functions on this bus. Literally claiming the MMIO spot so config-space access can do its thing. It's giving “reserve the vibe, access the config” 🔥

🌈 RETURN 🌈

• 0 on success 🎉
• -errno on failure 😭

👑 SEE ALSO 👑

Kernel file: ./drivers/pci/controller/pci-hyperv.c

The whole bestie friend group, in original order:

• struct hv_msi_desc(9)
• struct hv_msi_desc2(9)
• struct tran_int_desc(9)
• hv_irq_retarget_interrupt(9)
• hv_pci_generic_compl(9)
• devfn_to_wslot(9)
• wslot_to_devfn(9)
• _hv_pcifront_read_config(9)
• _hv_pcifront_write_config(9)
• hv_pcifront_read_config(9)
• hv_pcifront_write_config(9)
• hv_pci_read_config_compl(9)
• hv_read_config_block(9)
• hv_pci_write_config_compl(9)
• hv_write_config_block(9)
• hv_register_block_invalidate(9)
• hv_msi_free(9)
• hv_compose_msi_msg(9)
• hv_pcie_init_irq_domain(9)
• get_bar_size(9)
• survey_child_resources(9)
• prepopulate_bars(9)
• create_root_hv_pci_bus(9)
• q_resource_requirements(9)
• new_pcichild_device(9)
• get_pcichild_wslot(9)
• pci_devices_present_work(9)
• hv_pci_start_relations_work(9)
• hv_pci_devices_present(9)
• hv_pci_devices_present2(9)
• hv_eject_device_work(9)
• hv_pci_eject_device(9)
• hv_pci_onchannelcallback(9)
• hv_pci_protocol_negotiation(9)
• hv_pci_free_bridge_windows(9)
• hv_pci_allocate_bridge_windows(9)
• hv_pci_enter_d0(9)
• hv_pci_query_relations(9)
• hv_send_resources_allocated(9)
• hv_send_resources_released(9)
• hv_pci_probe(9)
• hv_pci_remove(9)

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mwah 💋 source/version: ./drivers/pci/controller · date: October 2026 · hv_allocate_config_window(9) from the Kernel API Manual — periodt, that's the sign-off 🌈✨