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sparc64: Use CPU_POKE to resume idle cpu

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Use CPU_POKE hypervisor call to resume idle cpu if supported.

Signed-off-by: Vijay Kumar <vijay.ac.kumar@oracle.com>
Reviewed-by: Anthony Yznaga <anthony.yznaga@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vijay Kumar
2017-07-21 10:23:57 -06:00
committed by David S. Miller
parent 28d43de741
commit 8536e02e91
5 changed files with 90 additions and 5 deletions
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7
arch/sparc/kernel/process_64.c
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@@ -77,8 +77,13 @@ void arch_cpu_idle(void)
: "=&r" (pstate)
: "i" (PSTATE_IE));
if (!need_resched() && !cpu_is_offline(smp_processor_id()))
if (!need_resched() && !cpu_is_offline(smp_processor_id())) {
sun4v_cpu_yield();
/* If resumed by cpu_poke then we need to explicitly
* call scheduler_ipi().
*/
scheduler_poke();
}
/* Re-enable interrupts. */
__asm__ __volatile__(