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powerpc/smp: More generic support for "soft hotplug"

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This adds more generic support for doing CPU hotplug with a simple
idle loop and no actual reset of the processors. The generic
smp_generic_kick_cpu() does the hotplug bringup trick if the PACA
shows that the CPU has already been started at boot and we provide
an accessor for the CPU state.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Benjamin Herrenschmidt
2011-09-19 17:44:49 +00:00
parent b8bb922c68
commit fb82b83970
2 changed files with 26 additions and 5 deletions
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arch/powerpc/include/asm/smp.h
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@@ -65,6 +65,7 @@ int generic_cpu_disable(void);
void generic_cpu_die(unsigned int cpu);
void generic_mach_cpu_die(void);
void generic_set_cpu_dead(unsigned int cpu);
int generic_check_cpu_restart(unsigned int cpu);
#endif
#ifdef CONFIG_PPC64