Messages in this thread | | | Subject | Re: [PATCH v2] clocksource/arm_arch_timer: extract elf_hwcap use to arch-helper | From | Daniel Lezcano <> | Date | Thu, 13 Jun 2019 15:08:51 +0200 |
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On 13/06/2019 15:03, Marc Zyngier wrote: > + Daniel > > On Thu, 13 Jun 2019 13:51:02 +0100, > Andrew Murray <andrew.murray@arm.com> wrote: >> >> Different mechanisms are used to test and set elf_hwcaps between ARM >> and ARM64, this results in the use of ifdeferry in this file when >> setting/testing for the EVTSTRM hwcap. >> >> Let's improve readability by extracting this to an arch helper. >> >> Signed-off-by: Andrew Murray <andrew.murray@arm.com> >> Acked-by: Mark Rutland <mark.rutland@arm.com> >> Acked-by: Will Deacon <will.deacon@arm.com> > > Acked-by: Marc Zyngier <marc.zyngier@arm.com> > > Daniel, can you please take this though the clocksource tree?
Applied, thanks
-- Daniel
>> --- >> arch/arm/include/asm/arch_timer.h | 10 ++++++++++ >> arch/arm64/include/asm/arch_timer.h | 13 +++++++++++++ >> drivers/clocksource/arm_arch_timer.c | 15 ++------------- >> 3 files changed, 25 insertions(+), 13 deletions(-) >> >> diff --git a/arch/arm/include/asm/arch_timer.h b/arch/arm/include/asm/arch_timer.h >> index 4b66ecd6be99..ae533caec1e9 100644 >> --- a/arch/arm/include/asm/arch_timer.h >> +++ b/arch/arm/include/asm/arch_timer.h >> @@ -4,6 +4,7 @@ >> >> #include <asm/barrier.h> >> #include <asm/errno.h> >> +#include <asm/hwcap.h> >> #include <linux/clocksource.h> >> #include <linux/init.h> >> #include <linux/types.h> >> @@ -124,6 +125,15 @@ static inline void arch_timer_set_cntkctl(u32 cntkctl) >> isb(); >> } >> >> +static inline bool arch_timer_set_evtstrm_feature(void) >> +{ >> + elf_hwcap |= HWCAP_EVTSTRM; >> +} >> + >> +static inline bool arch_timer_have_evtstrm_feature(void) >> +{ >> + return elf_hwcap & HWCAP_EVTSTRM; >> +} >> #endif >> >> #endif >> diff --git a/arch/arm64/include/asm/arch_timer.h b/arch/arm64/include/asm/arch_timer.h >> index 50b3ab7ded4f..a847a3ee6cab 100644 >> --- a/arch/arm64/include/asm/arch_timer.h >> +++ b/arch/arm64/include/asm/arch_timer.h >> @@ -20,6 +20,7 @@ >> #define __ASM_ARCH_TIMER_H >> >> #include <asm/barrier.h> >> +#include <asm/hwcap.h> >> #include <asm/sysreg.h> >> >> #include <linux/bug.h> >> @@ -240,4 +241,16 @@ static inline int arch_timer_arch_init(void) >> return 0; >> } >> >> +static inline void arch_timer_set_evtstrm_feature(void) >> +{ >> + cpu_set_named_feature(EVTSTRM); >> +#ifdef CONFIG_COMPAT >> + compat_elf_hwcap |= COMPAT_HWCAP_EVTSTRM; >> +#endif >> +} >> + >> +static inline bool arch_timer_have_evtstrm_feature(void) >> +{ >> + return cpu_have_named_feature(EVTSTRM); >> +} >> #endif >> diff --git a/drivers/clocksource/arm_arch_timer.c b/drivers/clocksource/arm_arch_timer.c >> index b2a951a798e2..3583a92ad960 100644 >> --- a/drivers/clocksource/arm_arch_timer.c >> +++ b/drivers/clocksource/arm_arch_timer.c >> @@ -804,14 +804,7 @@ static void arch_timer_evtstrm_enable(int divider) >> cntkctl |= (divider << ARCH_TIMER_EVT_TRIGGER_SHIFT) >> | ARCH_TIMER_VIRT_EVT_EN; >> arch_timer_set_cntkctl(cntkctl); >> -#ifdef CONFIG_ARM64 >> - cpu_set_named_feature(EVTSTRM); >> -#else >> - elf_hwcap |= HWCAP_EVTSTRM; >> -#endif >> -#ifdef CONFIG_COMPAT >> - compat_elf_hwcap |= COMPAT_HWCAP_EVTSTRM; >> -#endif >> + arch_timer_set_evtstrm_feature(); >> cpumask_set_cpu(smp_processor_id(), &evtstrm_available); >> } >> >> @@ -1040,11 +1033,7 @@ static int arch_timer_cpu_pm_notify(struct notifier_block *self, >> } else if (action == CPU_PM_ENTER_FAILED || action == CPU_PM_EXIT) { >> arch_timer_set_cntkctl(__this_cpu_read(saved_cntkctl)); >> >> -#ifdef CONFIG_ARM64 >> - if (cpu_have_named_feature(EVTSTRM)) >> -#else >> - if (elf_hwcap & HWCAP_EVTSTRM) >> -#endif >> + if (arch_timer_have_evtstrm_feature()) >> cpumask_set_cpu(smp_processor_id(), &evtstrm_available); >> } >> return NOTIFY_OK; >> -- >> 2.21.0 >> >
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