STRUCT HV_MSI_DESC2(9)

🎀 struct hv_msi_desc2(9) 🎀

welcome to the Kernel API Manual, bestie — this page is for struct hv_msi_desc2, and it's giving 1.2 version of hv_msi_desc energy. not me being obsessed with a kernel struct, but here we are. 💅

💖 NAME 💖

• struct hv_msi_desc2 — the 1.2 version of hv_msi_desc. periodt.

✨ SYNOPSIS ✨

here's the exact struct shape, no cap:

struct hv_msi_desc2 {
    u8 vector;
    u8 delivery_mode;
    u16 vector_count;
    u16 processor_count;
    u16 processor_array[32];
 };

slay. that's the whole synopsis vibe.

🫶 Members 🫶

• vector — IDT entry. literally that.
• delivery_mode — as defined in Intel's Programmer's Reference Manual, Volume 3, Chapter 8.
• vector_count — number of contiguous entries in the Interrupt Descriptor Table that are occupied by this Message-Signaled Interrupt. For MSI, as first defined in PCI 2.2, this can be between 1 and 32. For MSI-X, as first defined in PCI 3.0, this must be 1, as each MSI-X table entry would have its own descriptor. iykyk.
• processor_count — number of bits enabled in array. no extra lore, that's the line.
• processor_array — All the target virtual processors. 💖

🌈 SEE ALSO 🌈

Kernel file first, because context: ./drivers/pci/controller/pci-hyperv.c. then the whole squad, every ref present and accounted for:

• struct hv_msi_desc(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_allocate_config_window(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)

mwah 💋 — source bestie: ./drivers/pci/controller · date: October 2026 · manual/version tag: struct hv_msi_desc2(9). that's the footer vibe, and we're out. 🦋