On Wed, Jul 20, 2011 at 04:32:25PM -0700, Mike Turquette wrote: > A quick poll of the ARM platforms that implement CPU Hotplug support > shows that every platform treats CPU 0 as a special case that cannot be > hotplugged. In fact every platform has identical code for > platform_cpu_die which returns -EPERM in the case of CPU 0.
Are you sure that's just not because everyone copied what Realview has been doing (highly likely)? I suspect that there's no reason that CPU0 can't be taken down, especially on those platforms which don't take the CPU fully offline but just put it into a WFI loop. Those which restart the CPUs through the boot loader probably detect CPU0 as the boot CPU, so they probably can't take CPU0 down. _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
