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powerpc/kvm/book3s_hv: Rework the secondary inhibit code

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As part of the support for split core on POWER8, we want to be able to
block splitting of the core while KVM VMs are active.

The logic to do that would be exactly the same as the code we currently
have for inhibiting onlining of secondaries.

Instead of adding an identical mechanism to block split core, rework the
secondary inhibit code to be a "HV KVM is active" check. We can then use
that in both the cpu hotplug code and the upcoming split core code.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Michael Neuling <mikey@neuling.org>
Acked-by: Alexander Graf <agraf@suse.de>
Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Michael Ellerman
2014-05-23 18:15:25 +10:00
committed by Benjamin Herrenschmidt
parent 64bb80d87f
commit 441c19c8a2
5 changed files with 45 additions and 43 deletions
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8
arch/powerpc/include/asm/smp.h
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@@ -68,14 +68,6 @@ void generic_mach_cpu_die(void);
void generic_set_cpu_dead(unsigned int cpu);
void generic_set_cpu_up(unsigned int cpu);
int generic_check_cpu_restart(unsigned int cpu);
extern void inhibit_secondary_onlining(void);
extern void uninhibit_secondary_onlining(void);
#else /* HOTPLUG_CPU */
static inline void inhibit_secondary_onlining(void) {}
static inline void uninhibit_secondary_onlining(void) {}
#endif
#ifdef CONFIG_PPC64