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x86/apic: Add NMI_VECTOR wait to IPI shorthand 

To support NMI shorthand broadcasts add the safe wait for ICR idle for NMI
vector delivery.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20190722105220.185838026@linutronix.de
This commit is contained in:
Thomas Gleixner 2019-07-22 20:47:20 +02:00
parent 3994ff90ac
commit bd82dba2fa
1 changed files with 4 additions and 1 deletions
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5
arch/x86/kernel/apic/ipi.c
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@ -30,7 +30,10 @@ void __default_send_IPI_shortcut(unsigned int shortcut, int vector)
/*
* Wait for idle.
*/
__xapic_wait_icr_idle();
if (unlikely(vector == NMI_VECTOR))
safe_apic_wait_icr_idle();
else
__xapic_wait_icr_idle();
/*
* No need to touch the target chip field. Also the destination