On Fri, Aug 14, 2015 at 09:26:21PM +0100, Bjorn Helgaas wrote: > On Fri, Aug 14, 2015 at 11:43 AM, Will Deacon <will.deacon@xxxxxxx> wrote: > > On Fri, Aug 14, 2015 at 05:40:51PM +0100, Bjorn Helgaas wrote: > >> Do we need support for pci-probe-only in pci-host-generic at all? > >> You're removing the use in amd-overdrive.dts, and there are no other > >> DTs in the kernel tree that mention it. > >> > >> If we can live without it, that would be nice. It seems like a relic from > >> days when we couldn't reliably assign resources. (I'm not saying we can do > >> that reliably even today, but I'd rather make it reliable than turn it > >> off.) > > > > Kvmtool certainly uses it (and generates its own DT, hence why you don't > > see it in mainline). Not sure about qemu, though. > > Do you know why kvmtool wants probe-only? Would something break if we > didn't support probe-only? I guess we'd be looking for a case where > Linux assigns resources and that assignment doesn't work with kvmtool? It's basically because the BARs aren't writable other than to find the region size. It could fixed with a bit of pain, but it doesn't help older kvmtools that do work with mainline today. Will -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
