Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 3010279f authored by Frederic Weisbecker's avatar Frederic Weisbecker
Browse files

x86: Tell irq work about self IPI support 



x86 supports irq work self-IPIs when local apic is available. This is
partly known on runtime so lets implement arch_irq_work_has_interrupt()
accordingly.

This should be safely called after setup_arch().

Acked-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
parent 76a33061

arch/x86/include/asm/Kbuild

+0 −1
Original line number Diff line number Diff line
@@ -7,6 +7,5 @@ genhdr-y += unistd_x32.h 
generic-y += clkdev.h

generic-y += cputime.h

generic-y += early_ioremap.h

generic-y += irq_work.h

generic-y += mcs_spinlock.h

generic-y += scatterlist.h

arch/x86/include/asm/irq_work.h

0 → 100644
+11 −0
Original line number Diff line number Diff line 
#ifndef _ASM_IRQ_WORK_H

#define _ASM_IRQ_WORK_H



#include <asm/processor.h>



static inline bool arch_irq_work_has_interrupt(void)

{

	return cpu_has_apic;

}



#endif /* _ASM_IRQ_WORK_H */

arch/x86/kernel/irq_work.c

+1 −1
Original line number Diff line number Diff line
@@ -41,7 +41,7 @@ __visible void smp_trace_irq_work_interrupt(struct pt_regs *regs) 
void arch_irq_work_raise(void)

{

#ifdef CONFIG_X86_LOCAL_APIC

	if (!cpu_has_apic)

	if (!arch_irq_work_has_interrupt())

		return;



	apic->send_IPI_self(IRQ_WORK_VECTOR);