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From: Thomas Gleixner <tglx@linutronix.de>
To: LKML <linux-kernel@vger.kernel.org>
Cc: x86@kernel.org, John Stultz <john.stultz@linaro.org>,
	Vincenzo Frascino <vincenzo.frascino@arm.com>,
	Andy Lutomirski <luto@kernel.org>,
	Christophe Leroy <christophe.leroy@c-s.fr>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Juergen Gross <jgross@suse.com>,
	Michael Kelley <mikelley@microsoft.com>,
	Sasha Levin <sashal@kernel.org>,
	Ralf Baechle <ralf@linux-mips.org>,
	Paul Burton <paulburton@kernel.org>,
	James Hogan <jhogan@kernel.org>,
	Russell King <linux@armlinux.org.uk>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>,
	Mark Rutland <mark.rutland@arm.com>,
	Marc Zyngier <maz@kernel.org>, Andrei Vagin <avagin@gmail.com>
Subject: [patch V2 04/17] ARM: vdso: Compile high resolution parts conditionally
Date: Fri, 07 Feb 2020 13:38:51 +0100
Message-ID: <20200207124402.622587341@linutronix.de> (raw)
In-Reply-To: <20200207123847.339896630@linutronix.de>

From: Thomas Gleixner <tglx@linutronix.de>

If the architected timer is disabled in the kernel configuration then let
the core VDSO code drop the high resolution parts at compile time.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

---
 arch/arm/include/asm/vdso/gettimeofday.h |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/arch/arm/include/asm/vdso/gettimeofday.h
+++ b/arch/arm/include/asm/vdso/gettimeofday.h
@@ -106,6 +106,12 @@ static __always_inline int clock_getres3
 	return ret;
 }
 
+static inline bool arm_vdso_hres_capable(void)
+{
+	return IS_ENABLED(CONFIG_ARM_ARCH_TIMER);
+}
+#define __arch_vdso_hres_capable arm_vdso_hres_capable
+
 static __always_inline u64 __arch_get_hw_counter(int clock_mode)
 {
 #ifdef CONFIG_ARM_ARCH_TIMER


  parent reply index

Thread overview: 60+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-07 12:38 [patch V2 00/17] VDSO consolidation Thomas Gleixner
2020-02-07 12:38 ` [patch V2 01/17] x86/vdso: Mark the TSC clocksource path likely Thomas Gleixner
2020-02-14 12:00   ` Vincenzo Frascino
2020-02-17 15:12   ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2020-02-07 12:38 ` [patch V2 02/17] ARM: vdso: Remove unused function Thomas Gleixner
2020-02-14 10:21   ` Vincenzo Frascino
2020-02-17 15:11   ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2020-02-07 12:38 ` [patch V2 03/17] lib/vdso: Allow the high resolution parts to be compiled out Thomas Gleixner
2020-02-14 11:54   ` Vincenzo Frascino
2020-02-17 15:11   ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2020-02-07 12:38 ` Thomas Gleixner [this message]
2020-02-14 11:55   ` [patch V2 04/17] ARM: vdso: Compile high resolution parts conditionally Vincenzo Frascino
2020-02-17 15:11   ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2020-02-07 12:38 ` [patch V2 05/17] MIPS: " Thomas Gleixner
2020-02-14 11:55   ` Vincenzo Frascino
2020-02-17 15:11   ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2020-02-07 12:38 ` [patch V2 06/17] clocksource: Cleanup struct clocksource and documentation Thomas Gleixner
2020-02-14 11:57   ` Vincenzo Frascino
2020-02-17 15:11   ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2020-02-07 12:38 ` [patch V2 07/17] x86/vdso: Move VDSO clocksource state tracking to callback Thomas Gleixner
2020-02-14 11:58   ` Vincenzo Frascino
2020-02-17 15:11   ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2020-02-07 12:38 ` [patch V2 08/17] clocksource: Add common vdso clock mode storage Thomas Gleixner
2020-02-17 10:36   ` Vincenzo Frascino
2020-02-17 15:11   ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2020-02-07 12:38 ` [patch V2 09/17] x86/vdso: Use generic VDSO " Thomas Gleixner
2020-02-14 10:32   ` Paolo Bonzini
2020-02-17 10:57   ` Vincenzo Frascino
2020-02-17 15:11   ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2020-02-07 12:38 ` [patch V2 10/17] mips: vdso: " Thomas Gleixner
2020-02-17 10:52   ` Vincenzo Frascino
2020-02-17 15:11   ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2020-02-17 19:18   ` tip-bot2 for Thomas Gleixner
2020-02-07 12:38 ` [patch V2 11/17] ARM/arm64: vdso: Use common vdso " Thomas Gleixner
2020-02-17 10:43   ` Vincenzo Frascino
2020-02-17 15:11   ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2020-02-17 19:18   ` tip-bot2 for Thomas Gleixner
     [not found]   ` <CGME20200221115643eucas1p12ecb95c6161853a0e7dfe9207db079be@eucas1p1.samsung.com>
2020-02-21 11:56     ` [patch V2 11/17] " Marek Szyprowski
2020-02-21 13:08       ` Vincenzo Frascino
2020-02-21 18:24       ` Vincenzo Frascino
2020-02-07 12:38 ` [patch V2 12/17] lib/vdso: Cleanup clock mode storage leftovers Thomas Gleixner
2020-02-17 11:04   ` Vincenzo Frascino
2020-02-17 15:11   ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2020-02-17 19:18   ` tip-bot2 for Thomas Gleixner
2020-02-07 12:39 ` [patch V2 13/17] lib/vdso: Avoid highres update if clocksource is not VDSO capable Thomas Gleixner
2020-02-17 11:07   ` Vincenzo Frascino
2020-02-17 15:11   ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2020-02-17 19:18   ` tip-bot2 for Thomas Gleixner
2020-02-07 12:39 ` [patch V2 14/17] lib/vdso: Move VCLOCK_TIMENS to vdso_clock_modes Thomas Gleixner
2020-02-17 11:12   ` Vincenzo Frascino
2020-02-17 15:11   ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2020-02-17 19:18   ` tip-bot2 for Thomas Gleixner
2020-02-07 12:39 ` [patch V2 15/17] lib/vdso: Allow fixed clock mode Thomas Gleixner
2020-02-17 11:14   ` Vincenzo Frascino
2020-02-17 15:11   ` [tip: timers/core] " tip-bot2 for Christophe Leroy
2020-02-17 19:18   ` tip-bot2 for Christophe Leroy
2020-02-07 12:39 ` [patch V2 16/17] lib/vdso: Allow architectures to override the ns shift operation Thomas Gleixner
2020-02-17 11:15   ` Vincenzo Frascino
2020-02-07 12:39 ` [patch V2 17/17] lib/vdso: Allow architectures to provide the vdso data pointer Thomas Gleixner
2020-02-17 12:09   ` Vincenzo Frascino

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