From: Feng Tang <feng.tang@intel.com>
To: Thomas Gleixner <tglx@linutronix.de>,
John Stultz <john.stultz@linaro.org>, Ingo Molnar <mingo@elte.hu>,
"H. Peter Anvin" <hpa@linux.intel.com>,
x86@kernel.org, Len Brown <lenb@kernel.org>,
"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>,
linux-kernel@vger.kernel.org
Cc: gong.chen@linux.intel.com, Feng Tang <feng.tang@intel.com>
Subject: [RFC PATCH v2 2/4] clocksource: Add new feature flag CLOCK_SOURCE_SUSPEND_NOTSTOP
Date: Tue, 5 Mar 2013 10:27:04 +0800 [thread overview]
Message-ID: <1362450426-4232-3-git-send-email-feng.tang@intel.com> (raw)
In-Reply-To: <1362450426-4232-1-git-send-email-feng.tang@intel.com>
Some x86 processors have a TSC clocksource, which continue to work when
system is suspend. Add a feature flag so that it could be utilized.
Signed-off-by: Feng Tang <feng.tang@intel.com>
---
include/linux/clocksource.h | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)
diff --git a/include/linux/clocksource.h b/include/linux/clocksource.h
index 27cfda4..5dee330 100644
--- a/include/linux/clocksource.h
+++ b/include/linux/clocksource.h
@@ -206,6 +206,7 @@ struct clocksource {
#define CLOCK_SOURCE_WATCHDOG 0x10
#define CLOCK_SOURCE_VALID_FOR_HRES 0x20
#define CLOCK_SOURCE_UNSTABLE 0x40
+#define CLOCK_SOURCE_SUSPEND_NOTSTOP 0x80
/* simplify initialization of mask field */
#define CLOCKSOURCE_MASK(bits) (cycle_t)((bits) < 64 ? ((1ULL<<(bits))-1) : -1)
--
1.7.0.4
next prev parent reply other threads:[~2013-03-05 2:28 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-05 2:27 [RFC PATCH v2 0/4] Add support for S3 non-stop TSC support Feng Tang
2013-03-05 2:27 ` [RFC PATCH v2 1/4] x86: Add cpu capability flag X86_FEATURE_NONSTOP_TSC_S3 Feng Tang
2013-03-05 2:27 ` Feng Tang [this message]
2013-03-05 2:27 ` [RFC PATCH v2 3/4] x86: tsc: Add support for new S3_NOTSTOP feature Feng Tang
2013-03-05 2:27 ` [RFC PATCH v2 4/4] timekeeping: utilize the suspend-nonstop clocksource to count suspended time Feng Tang
2013-03-05 6:27 ` John Stultz
2013-03-05 6:38 ` Feng Tang
2013-03-05 6:47 ` John Stultz
2013-03-05 6:59 ` Feng Tang
2013-03-05 3:53 ` [RFC PATCH v2 0/4] Add support for S3 non-stop TSC support Feng Tang
2013-03-05 4:32 ` Jason Gunthorpe
2013-03-05 6:17 ` John Stultz
2013-03-06 3:31 ` Feng Tang
2013-03-05 6:27 ` Feng Tang
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