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Message-ID: <09CB0B4607EB8F4DB7E0BE3B06BFBD0501004D78@SHSMSX101.ccr.corp.intel.com> Date: Wed, 26 Mar 2014 08:06:07 +0000 From: "Wang, Biao" <biao.wang@...el.com> To: "hpa@...or.com" <hpa@...or.com>, "mingo@...hat.com" <mingo@...hat.com>, "tglx@...utronix.de" <tglx@...utronix.de>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> CC: "Zhang, Di" <di.zhang@...el.com> Subject: [PATCH] x86: apic: disarm apic timer in deadline mode when shut down clockevent For tsc deadline mode, when we shut down clockevent we should disarm local-APIC timer like count-down mode. Signed-off-by: wang, biao <biao.wang@...el.com> Signed-off-by: Zhang Di <di.zhang@...el.com> --- arch/x86/kernel/apic/apic.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c index 7f26c9a..85889ba 100644 --- a/arch/x86/kernel/apic/apic.c +++ b/arch/x86/kernel/apic/apic.c @@ -512,6 +512,10 @@ static void lapic_timer_setup(enum clock_event_mode mode, v |= (APIC_LVT_MASKED | LOCAL_TIMER_VECTOR); apic_write(APIC_LVTT, v); apic_write(APIC_TMICT, 0); + + /*disarm timer in deadline mode*/ + if (boot_cpu_has(X86_FEATURE_TSC_DEADLINE_TIMER)) + wrmsrl(MSR_IA32_TSC_DEADLINE, 0); break; case CLOCK_EVT_MODE_RESUME: /* Nothing to do here */ -- 1.7.6 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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