[patch V3 15/25] x86/apic: Add NMI_VECTOR wait to IPI shorthand

Thomas Gleixner
2019-07-22T18:58:07Z

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

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
arch/x86/kernel/apic/ipi.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)

--- a/arch/x86/kernel/apic/ipi.c
+++ b/arch/x86/kernel/apic/ipi.c
@@ -30,7 +30,10 @@ void __default_send_IPI_shortcut(unsigne
/*
* 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