On 1/14/19 4:10 PM, Greg Kurz wrote: > On Mon, 14 Jan 2019 09:19:50 +0100 > Cédric Le Goater <c...@kaod.org> wrote: > >> On 1/11/19 10:04 PM, Greg Kurz wrote: >>> When using the in-kernel interrupt controller, the state of all irqs is >>> synchronized to KVM at machine reset time. In the case of PHB hotplug, we >>> will need to synchronize LSIs manually. >> >> Yes. This is because the interrupt sources in the KVM XICS device have >> already been initialized as MSIs. >> >> Can not we reset the source when it is claimed ? >> >> An alternative solution would be to initialize the SPAPR_IRQ_PCI_LSI range >> as LSIs at a KVM level. >> > > I don't really want to add some dependency to sPAPR code in KVM XICS... what > about claiming LSIs for all possible PHBs at machine init time ?
you can not claim IRQ numbers twice. So if a new PHB is hot-plugged, it will fail the claim its LSIs. C.
