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powerpc/64s/idle: POWER9 implement a separate idle stop function for hotplug

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Implement a new function to invoke stop, power9_offline_stop, which is
like power9_idle_stop but used by the cpu hotplug code.

Move KVM secondary state manipulation code to the offline case.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Nicholas Piggin
2017-11-18 00:08:05 +10:00
committed by Michael Ellerman
parent d40b6768e4
commit 3d4fbffdd7
3 changed files with 20 additions and 7 deletions
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arch/powerpc/include/asm/processor.h
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@@ -518,6 +518,7 @@ extern int powersave_nap; /* set if nap mode can be used in idle loop */
extern unsigned long power7_idle_insn(unsigned long type); /* PNV_THREAD_NAP/etc*/
extern void power7_idle_type(unsigned long type);
extern unsigned long power9_idle_stop(unsigned long psscr_val);
extern unsigned long power9_offline_stop(unsigned long psscr_val);
extern void power9_idle_type(unsigned long stop_psscr_val,
unsigned long stop_psscr_mask);