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powerpc/powernv: Use deepest stop state when cpu is offlined

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If hardware supports stop state, use the deepest stop state when
the cpu is offlined.

Reviewed-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Signed-off-by: Shreyas B. Prabhu <shreyas@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Shreyas B. Prabhu
2016-07-08 11:50:53 +05:30
committed by Michael Ellerman
parent 3005c597ba
commit c0691f9dd2
3 changed files with 17 additions and 3 deletions
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4
arch/powerpc/platforms/powernv/smp.c
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@@ -182,7 +182,9 @@ static void pnv_smp_cpu_kill_self(void)
ppc64_runlatch_off();
if (idle_states & OPAL_PM_WINKLE_ENABLED)
if (cpu_has_feature(CPU_FTR_ARCH_300))
srr1 = power9_idle_stop(pnv_deepest_stop_state);
else if (idle_states & OPAL_PM_WINKLE_ENABLED)
srr1 = power7_winkle();
else if ((idle_states & OPAL_PM_SLEEP_ENABLED) ||
(idle_states & OPAL_PM_SLEEP_ENABLED_ER1))