From: Frederic Weisbecker <fweisbec@gmail.com>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>,
Peter Zijlstra <peterz@infradead.org>,
Dave Jones <davej@redhat.com>,
Thomas Gleixner <tglx@linutronix.de>,
Russell King <linux@arm.linux.org.uk>,
Catalin Iacob <iacobcatalin@gmail.com>,
"Paul E . McKenney" <paulmck@linux.vnet.ibm.com>,
Will Deacon <will.deacon@arm.com>, Ingo Molnar <mingo@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>
Subject: [PATCH 6/8] arm64: Tell irq work about self IPI support
Date: Wed, 10 Sep 2014 23:33:26 +0200 [thread overview]
Message-ID: <1410384808-14760-7-git-send-email-fweisbec@gmail.com> (raw)
In-Reply-To: <1410384808-14760-1-git-send-email-fweisbec@gmail.com>
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.
Cc: 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>
---
arch/arm64/include/asm/Kbuild | 1 -
arch/arm64/include/asm/irq_work.h | 11 +++++++++++
arch/arm64/include/asm/smp.h | 2 ++
arch/arm64/kernel/smp.c | 2 +-
4 files changed, 14 insertions(+), 2 deletions(-)
create mode 100644 arch/arm64/include/asm/irq_work.h
diff --git a/arch/arm64/include/asm/Kbuild b/arch/arm64/include/asm/Kbuild
index d617789..c196847 100644
--- a/arch/arm64/include/asm/Kbuild
+++ b/arch/arm64/include/asm/Kbuild
@@ -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
diff --git a/arch/arm64/include/asm/irq_work.h b/arch/arm64/include/asm/irq_work.h
new file mode 100644
index 0000000..8e24ef3
--- /dev/null
+++ b/arch/arm64/include/asm/irq_work.h
@@ -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 */
diff --git a/arch/arm64/include/asm/smp.h b/arch/arm64/include/asm/smp.h
index a498f2c..780f82c 100644
--- a/arch/arm64/include/asm/smp.h
+++ b/arch/arm64/include/asm/smp.h
@@ -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.
*/
diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
index 4743397..b06d1d9 100644
--- a/arch/arm64/kernel/smp.c
+++ b/arch/arm64/kernel/smp.c
@@ -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))
{
--
2.1.0
next prev parent reply other threads:[~2014-09-10 21:33 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-10 21:33 [PATCH 0/8] nohz: Fix nohz kick irq work on tick v2 Frederic Weisbecker
2014-09-10 21:33 ` [PATCH 1/8] nohz: Move nohz full init call to tick init Frederic Weisbecker
2014-09-10 21:33 ` [PATCH 2/8] irq_work: Introduce arch_irq_work_has_interrupt() Frederic Weisbecker
2014-09-10 21:33 ` [PATCH 3/8] irq_work: Force raised irq work to run on irq work interrupt Frederic Weisbecker
2014-09-10 21:33 ` [PATCH 4/8] x86: Tell irq work about self IPI support Frederic Weisbecker
2014-09-10 21:33 ` [PATCH 5/8] arm: " Frederic Weisbecker
2014-09-10 21:33 ` Frederic Weisbecker [this message]
2014-09-11 9:00 ` [PATCH 6/8] arm64: " Catalin Marinas
2014-09-13 16:47 ` Frederic Weisbecker
2014-09-10 21:33 ` [PATCH 7/8] nohz: Consolidate nohz full init code Frederic Weisbecker
2014-09-10 21:33 ` [PATCH 8/8] nohz: nohz full depends on irq work self IPI support Frederic Weisbecker
2014-09-11 8:28 ` [PATCH 0/8] nohz: Fix nohz kick irq work on tick v2 Peter Zijlstra
2014-09-12 18:05 ` Frederic Weisbecker
2014-09-12 19:00 ` Peter Zijlstra
-- strict thread matches above, loose matches on Subject: below --
2014-09-20 20:30 [PATCH 0/8] nohz: Fix nohz kick irq work on tick v3 Frederic Weisbecker
2014-09-20 20:30 ` [PATCH 6/8] arm64: Tell irq work about self IPI support Frederic Weisbecker
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