hv_pci_onchannelcallback(9)

💅 hv_pci_onchannelcallback(9) 💅

okay so bestie, welcome to the Kernel API Manual page for hv_pci_onchannelcallback ✨ like yes that's the manual name, we're being official today 🎀

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🌸 NAME 🌸

hv_pci_onchannelcallback — the function that handles incoming packets 💌 (yes that's literally the whole personality)

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🦋 SYNOPSIS 🦋

void hv_pci_onchannelcallback (void *context );

that's it. that's the whole signature. no cap. returns nothing, takes one pointer, slays 💅

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✨ ARGUMENTS ✨

• context — the internal bus tracking struct 🫶 like it's the little notebook where the bus keeps its notes about itself, and this function gets handed it so it knows who's talking.

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💖 DESCRIPTION 💖

so basically: this function gets invoked whenever the host sends a packet to this channel 🔥 and lowkey that channel is private to this root PCI bus — like it's not a group chat, it's a two-person DM, iykyk 🙈

that's the vibe. host sends a packet → this function wakes up → does its thing. main character energy fr fr 👑

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🌈 SEE ALSO 🌈

this list is long bestie, grab a snack 🍓 everything below lives with the kernel file ./drivers/pci/controller/pci-hyperv.c — iconic source, no notes 💜

🧚 the struct girlies

• struct hv_msi_desc(9)
• struct hv_msi_desc2(9)
• struct tran_int_desc(9)

💫 the irq / msi squad

• hv_irq_retarget_interrupt(9)
• hv_msi_free(9)
• hv_compose_msi_msg(9)
• hv_pcie_init_irq_domain(9)

🎀 devfn ↔ wslot conversions (the translators)

• devfn_to_wslot(9)
• wslot_to_devfn(9)

⭐ config space reading & writing (the whole config saga)

• _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_pci_generic_compl(9)

🦋 bars, resources & root bus setup (the whole construction era)

• 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)

👑 device present / eject (the drama arc)

• 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)

🔥 protocol negotiation & windows (the negotiations)

• hv_pci_protocol_negotiation(9)
• hv_pci_free_bridge_windows(9)
• hv_pci_allocate_bridge_windows(9)
• hv_allocate_config_window(9)

🧚 entering d0 & querying relations (the getting-to-know-you era)

• hv_pci_enter_d0(9)
• hv_pci_query_relations(9)

💜 resources allocated / released

• hv_send_resources_allocated(9)
• hv_send_resources_released(9)

🌸 probe & remove (the beginning and the end, periodt)

• hv_pci_probe(9)
• hv_pci_remove(9)

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okay that's the whole page bestie, you ate that 💅 literal perfection, no crumbs 🫶

oh and for the credits moment: this lil masterpiece comes to you from ./drivers/pci/controller, dated October 2026, and it's filed under hv_pci_onchannelcallback(9) — screenshot it, frame it, put it on the fridge 💖✨🎀