On Mon, 2025-05-19 at 16:28 -0700, Sean Christopherson wrote: > Add a Kconfig to allowing building KVM without support for emulating an ^ allow > I/O APIC, PIC, and PIT, which is desirable for deployments that effectively > don't support a fully in-kernel IRQ chip, i.e. never expect any VMM to > create an in-kernel I/O APIC. > Do you happen to know what developments don't support a full in-kernel IRQ chip? Do they only support userspace IRQ chip, or not support any IRQ chip at all?