vfio_ap_wait_for_irqclear(9)

💅 vfio_ap_wait_for_irqclear(9) — Kernel API Manual 💅

okay so bestie, this is the Kernel API Manual page for vfio_ap_wait_for_irqclear, and it's lowkey a whole little vibe. let's get into it 🫶✨

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✨ NAME ✨

• vfio_ap_wait_for_irqclear — clears the IR bit or gives up after 5 tries 💅

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🌸 SYNOPSIS 🌸

void vfio_ap_wait_for_irqclear (int apqn );

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🎀 ARGUMENTS 🎀

• apqn — The AP Queue number. that's the APQN you're checking on, periodt 💖

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🦋 DESCRIPTION 🦋

okay so here's the tea: it checks the IRQ bit for the status of this APQN using ap_tapq. if the ap_tapq function succeeded and the bit is clear, it returns. if the ap_tapq function failed with invalid, deconfigured or checkstopped AP, it also returns. otherwise? it retries up to 5 times after waiting 20ms. no cap, that's the whole loop 🌈

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💜 SEE ALSO 💜

• Kernel file ./drivers/s390/crypto/vfio_ap_ops.c
• get_update_locks_for_kvm(9)
• release_update_locks_for_kvm(9)
• get_update_locks_for_mdev(9)
• release_update_locks_for_mdev(9)
• get_update_locks_by_apqn(9)
• get_update_locks_for_queue(9)
• vfio_ap_mdev_get_queue(9)
• vfio_ap_free_aqic_resources(9)
• vfio_ap_irq_disable(9)
• vfio_ap_validate_nib(9)
• ensure_nib_shared(9)
• vfio_ap_irq_enable(9)
• vfio_ap_le_guid_to_be_uuid(9)
• handle_pqap(9)
• vfio_ap_mdev_verify_no_sharing(9)
• vfio_ap_mdev_validate_masks(9)
• assign_adapter_store(9)
• vfio_ap_mdev_unlink_adapter(9)
• unassign_adapter_store(9)
• assign_domain_store(9)
• unassign_domain_store(9)
• assign_control_domain_store(9)
• unassign_control_domain_store(9)
• vfio_ap_mdev_set_kvm(9)
• vfio_ap_mdev_unset_kvm(9)
• vfio_ap_mdev_resource_in_use(9)
• vfio_ap_mdev_hot_unplug_cfg(9)
• vfio_ap_mdev_cfg_remove(9)
• vfio_ap_mdev_on_cfg_remove(9)
• vfio_ap_filter_apid_by_qtype(9)
• vfio_ap_mdev_cfg_add(9)
• vfio_ap_mdev_on_cfg_add(9)
• vfio_ap_on_cfg_changed(9)

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okay bye bestie 🫶 this page lives in ./drivers/s390/crypto, it's dated October 2026, and it's serving vfio_ap_wait_for_irqclear(9) from the Kernel API Manual 💅✨💖