On Thu, 2012-01-26 at 14:33 -0700, Grant Likely wrote: > I've got the x86 fix in my tree now. It will be part of the next > merge. MIPS, Microblaze and OpenRISC cannot turn on CONFIG_IRQ_DOMAIN > without rework. I just hacked together the microblaze version, but > Michal will have to verify that it is correct. I just posted it. It > will be similar for the other two. > > The real problem is sparc which does something entirely different for > irqs. Rather than resolving irqs on-demand, it calculates the Linux > irq numbers at boot time for every node in the tree. The irq_domains > will need to be set up for all interrupt controllers before sparc > begins it's big walk of the tree to resolve interrupts. I haven't dug > into everything that needs to be done to support this. > > I don't think you can count on turning on IRQ_DOMAIN on all > architectures just yet. Adding irq_domain support directly to > irq_generic_chip is going to be difficult for that reason. However, > it would be useful to have an irq_domain+irq_generic_chip wrapper that > can be enabled only when IRQ_DOMAIN is enabled.
Beware also that there are plenty of cases where 1 irq domain != 1 irq chip, for example on cell or xics where a single domain can encompass multiple chips. I don't know whether x86 APICs are the same, they could be tho :-) Cheers, Ben. _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
