The VFIO platform needs to setup irqfd but it does not know the gsi associated to the sysbus device qemu_irq.
With PCI there is a PCIINTxRoute bus lookup mechanism that enables to retrieve the gsi from the PCI host controller/bridge pin. The conversion is implemented by the PCI host controller. With platform devices, this conversion function is implemented by the interrupt controller. This series implements a hash table in kvm-all that stores the mapping between qemu_irq and gsi. A setter is introduced for the interrupt controller to insert mappings. Also functions are added to setup/tear down irqfd directly from a qemu_irq. Those functions now can be used by the VFIO platform device to setup VFIO signaling. v1 -> v2: - series renamed from "irq: add get_gsi callback" - follow implementation suggested by Paolo (hope I fully understood it) Eric Auger (2): kvm-all.c: add qemu_irq/gsi hash table and utility routines intc: arm_gic_kvm: set the qemu_irq/gsi mapping hw/intc/arm_gic_kvm.c | 5 +++++ include/sysemu/kvm.h | 6 ++++++ kvm-all.c | 35 +++++++++++++++++++++++++++++++++++ 3 files changed, 46 insertions(+) -- 1.8.3.2 _______________________________________________ kvmarm mailing list [email protected] https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
