Messages in this thread | | | Subject | Re: [PATCH 0/4] powerpc: Fix minor build issues on 2.6.32-rc7 without CONFIG_XICS set | From | Michael Ellerman <> | Date | Tue, 17 Nov 2009 23:39:04 +1100 |
| |
On Tue, 2009-11-17 at 12:07 +0000, Mel Gorman wrote: > KConfig doesn't require CONFIG_XICS to be set with CONFIG_PSERIES but if > it's not set, there are numerous small build errors. This is a small series > of patches to allow CONFIG_XICS to be unset in the config. > > XICS appears to be some sort of interrupt controller but I'm not sure how > common it is on systems that require CONFIG_PSERIES. If CONFIG_PSERIES > universally requires CONFIG_XICS, the better path might be to force it to > be set.
It is indeed 'some sort of interrupt controller' :)
All the virtualised PSERIES systems have, or appear to have, a XICS. So it's pretty common.
I think the only time you see an MPIC is on older machines, and even then maybe only if you're running bare metal.
So it is pretty much required for a PSERIES kernel, but perhaps there are cases where the BML guys want to be able to turn it off.
cheers [unhandled content-type:application/pgp-signature] | |