From: Frederic Weisbecker <frederic@kernel.org>
To: Peter Zijlstra <peterz@infradead.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
Frederic Weisbecker <frederic@kernel.org>,
Ard Biesheuvel <ardb@kernel.org>,
James Morse <james.morse@arm.com>,
Quentin Perret <qperret@google.com>,
Mark Rutland <mark.rutland@arm.com>
Subject: [PATCH 4/4] arm64: Implement HAVE_PREEMPT_DYNAMIC
Date: Tue, 21 Sep 2021 01:32:37 +0200 [thread overview]
Message-ID: <20210920233237.90463-5-frederic@kernel.org> (raw)
In-Reply-To: <20210920233237.90463-1-frederic@kernel.org>
Provide the static calls for the common preemption points and report
arm64 ability to support dynamic preemption.
Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Quentin Perret <qperret@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: James Morse <james.morse@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Ard Biesheuvel <ardb@kernel.org>
---
arch/arm64/Kconfig | 1 +
arch/arm64/include/asm/preempt.h | 20 +++++++++++++++++---
2 files changed, 18 insertions(+), 3 deletions(-)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 5b51b359ccda..e28bcca8954c 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -191,6 +191,7 @@ config ARM64
select HAVE_PERF_EVENTS
select HAVE_PERF_REGS
select HAVE_PERF_USER_STACK_DUMP
+ select HAVE_PREEMPT_DYNAMIC
select HAVE_REGS_AND_STACK_ACCESS_API
select HAVE_STATIC_CALL
select HAVE_FUNCTION_ARG_ACCESS_API
diff --git a/arch/arm64/include/asm/preempt.h b/arch/arm64/include/asm/preempt.h
index 4fbbe644532f..69d1cc491d3b 100644
--- a/arch/arm64/include/asm/preempt.h
+++ b/arch/arm64/include/asm/preempt.h
@@ -82,15 +82,29 @@ static inline bool should_resched(int preempt_offset)
#ifdef CONFIG_PREEMPTION
void preempt_schedule(void);
-#define __preempt_schedule() preempt_schedule()
void preempt_schedule_notrace(void);
-#define __preempt_schedule_notrace() preempt_schedule_notrace()
-#endif /* CONFIG_PREEMPTION */
#ifdef CONFIG_PREEMPT_DYNAMIC
+
+#define __preempt_schedule_func preempt_schedule
+DECLARE_STATIC_CALL(preempt_schedule, __preempt_schedule_func);
+#define __preempt_schedule() static_call(preempt_schedule)()
+
+#define __preempt_schedule_notrace_func preempt_schedule_notrace
+DECLARE_STATIC_CALL(preempt_schedule_notrace, __preempt_schedule_notrace_func);
+#define __preempt_schedule_notrace() static_call(preempt_schedule_notrace)()
+
void arm64_preempt_schedule_irq(void);
#define __irqentry_exit_cond_resched_func arm64_preempt_schedule_irq
DECLARE_STATIC_CALL(irqentry_exit_cond_resched, __irqentry_exit_cond_resched_func);
+
+#else /* !CONFIG_PREEMPT_DYNAMIC */
+
+#define __preempt_schedule() preempt_schedule()
+#define __preempt_schedule_notrace() preempt_schedule_notrace()
+
#endif /* CONFIG_PREEMPT_DYNAMIC */
+#endif /* CONFIG_PREEMPTION */
+
#endif /* __ASM_PREEMPT_H */
--
2.25.1
next prev parent reply other threads:[~2021-09-20 23:38 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-20 23:32 [PATCH 0/4] arm64: Support dynamic preemption Frederic Weisbecker
2021-09-20 23:32 ` [PATCH 1/4] sched/preempt: Prepare for supporting !CONFIG_GENERIC_ENTRY " Frederic Weisbecker
2021-09-21 7:10 ` Peter Zijlstra
2021-09-21 13:50 ` Mark Rutland
2021-09-20 23:32 ` [PATCH 2/4] arm64: implement support for static call trampolines Frederic Weisbecker
2021-09-21 7:09 ` Peter Zijlstra
2021-09-21 14:44 ` Ard Biesheuvel
2021-09-21 15:08 ` Peter Zijlstra
2021-09-21 15:33 ` Mark Rutland
2021-09-21 15:55 ` Ard Biesheuvel
2021-09-21 16:28 ` Mark Rutland
2021-09-25 17:46 ` David Laight
2021-09-27 8:58 ` Mark Rutland
2021-09-21 16:10 ` Ard Biesheuvel
2021-09-20 23:32 ` [PATCH 3/4] arm64: Implement IRQ exit preemption static call for dynamic preemption Frederic Weisbecker
2021-09-20 23:32 ` Frederic Weisbecker [this message]
2021-10-25 12:20 [PATCH 0/4] arm64: Support dynamic preemption v2 Frederic Weisbecker
2021-10-25 12:21 ` [PATCH 4/4] arm64: Implement HAVE_PREEMPT_DYNAMIC Frederic Weisbecker
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