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arm64: Tell irq work about self IPI support

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ARM64 irq work self-IPI support depends on __smp_cross_call to point to
some relevant IRQ controller operations. This information should be
available after the call to init_IRQ().

Lets implement arch_irq_work_has_interrupt() accordingly.

Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
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>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
This commit is contained in:
Frederic Weisbecker 2014-08-16 18:48:05 +02:00
parent 09f6edd424
commit 3631073659
4 changed files with 14 additions and 2 deletions
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1
arch/arm64/include/asm/Kbuild
View File

@ -19,7 +19,6 @@ generic-y += ioctl.h
generic-y += ioctls.h
generic-y += ipcbuf.h
generic-y += irq_regs.h
generic-y += irq_work.h
generic-y += kdebug.h
generic-y += kmap_types.h
generic-y += kvm_para.h

11
arch/arm64/include/asm/irq_work.h Normal file
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@ -0,0 +1,11 @@
#ifndef __ASM_IRQ_WORK_H
#define __ASM_IRQ_WORK_H
#include <asm/smp.h>
static inline bool arch_irq_work_has_interrupt(void)
{
return !!__smp_cross_call;
}
#endif /* __ASM_IRQ_WORK_H */

2
arch/arm64/include/asm/smp.h
View File

@ -48,6 +48,8 @@ extern void smp_init_cpus(void);
*/
extern void set_smp_cross_call(void (*)(const struct cpumask *, unsigned int));
extern void (*__smp_cross_call)(const struct cpumask *, unsigned int);
/*
* Called from the secondary holding pen, this is the secondary CPU entry point.
*/

2
arch/arm64/kernel/smp.c
View File

@ -470,7 +470,7 @@ void __init smp_prepare_cpus(unsigned int max_cpus)
}
}
static void (*__smp_cross_call)(const struct cpumask *, unsigned int);
void (*__smp_cross_call)(const struct cpumask *, unsigned int);
void __init set_smp_cross_call(void (*fn)(const struct cpumask *, unsigned int))
{