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From: Richard Cochran <richardcochran@gmail.com>
To: Jianyong Wu <jianyong.wu@arm.com>
Cc: Mark.Rutland@arm.com, justin.he@arm.com, suzuki.poulose@arm.com,
	netdev@vger.kernel.org, Steve.Capper@arm.com,
	Will.Deacon@arm.com, linux-kernel@vger.kernel.org,
	sean.j.christopherson@intel.com, Kaly.Xin@arm.com,
	maz@kernel.org, pbonzini@redhat.com, nd@arm.com,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 3/6] Timer: expose monotonic clock and counter value
Date: Tue, 17 Sep 2019 20:42:35 -0700	[thread overview]
Message-ID: <20190918034235.GA1469@localhost> (raw)
In-Reply-To: <20190917112430.45680-4-jianyong.wu@arm.com>

On Tue, Sep 17, 2019 at 07:24:27AM -0400, Jianyong Wu wrote:
> A number of PTP drivers (such as ptp-kvm) are assuming what the
> current clock source is, which could lead to interesting effects on
> systems where the clocksource can change depending on external events.
> 
> For this purpose, add a new API that retrives both the current
> monotonic clock as well as its counter value.
> 
> Signed-off-by: Marc Zyngier <maz@kernel.org>
> Signed-off-by: Jianyong Wu <jianyong.wu@arm.com>
> ---
>  include/linux/timekeeping.h |  3 +++
>  kernel/time/timekeeping.c   | 13 +++++++++++++
>  2 files changed, 16 insertions(+)

For core time keeping changes, you must CC lkml, tglx, and John Stultz.

Thanks,
Richard

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WARNING: multiple messages have this Message-ID (diff)
From: Richard Cochran <richardcochran@gmail.com>
To: Jianyong Wu <jianyong.wu@arm.com>
Cc: netdev@vger.kernel.org, pbonzini@redhat.com,
	sean.j.christopherson@intel.com, maz@kernel.org,
	Mark.Rutland@arm.com, Will.Deacon@arm.com,
	suzuki.poulose@arm.com, linux-kernel@vger.kernel.org,
	Steve.Capper@arm.com, Kaly.Xin@arm.com, justin.he@arm.com,
	nd@arm.com, linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 3/6] Timer: expose monotonic clock and counter value
Date: Tue, 17 Sep 2019 20:42:35 -0700	[thread overview]
Message-ID: <20190918034235.GA1469@localhost> (raw)
In-Reply-To: <20190917112430.45680-4-jianyong.wu@arm.com>

On Tue, Sep 17, 2019 at 07:24:27AM -0400, Jianyong Wu wrote:
> A number of PTP drivers (such as ptp-kvm) are assuming what the
> current clock source is, which could lead to interesting effects on
> systems where the clocksource can change depending on external events.
> 
> For this purpose, add a new API that retrives both the current
> monotonic clock as well as its counter value.
> 
> Signed-off-by: Marc Zyngier <maz@kernel.org>
> Signed-off-by: Jianyong Wu <jianyong.wu@arm.com>
> ---
>  include/linux/timekeeping.h |  3 +++
>  kernel/time/timekeeping.c   | 13 +++++++++++++
>  2 files changed, 16 insertions(+)

For core time keeping changes, you must CC lkml, tglx, and John Stultz.

Thanks,
Richard

  parent reply	other threads:[~2019-09-18  3:43 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-17 11:24 [RFC PATCH v2 0/6] Enable ptp_kvm for arm64 Jianyong Wu
2019-09-17 11:24 ` Jianyong Wu
2019-09-17 11:24 ` [RFC PATCH v2 1/6] Export psci_ops.conduit symbol as modules will use it Jianyong Wu
2019-09-17 11:24   ` Jianyong Wu
2019-09-17 11:24 ` [RFC PATCH v2 2/6] reorganize ptp_kvm modules to make it arch-independent Jianyong Wu
2019-09-17 11:24   ` Jianyong Wu
2019-09-17 11:24 ` [PATCH 3/6] Timer: expose monotonic clock and counter value Jianyong Wu
2019-09-17 11:24   ` Jianyong Wu
2019-09-17 17:10   ` Marc Zyngier
2019-09-17 17:10     ` Marc Zyngier
2019-09-18  2:50     ` Jianyong Wu (Arm Technology China)
2019-09-18  2:50       ` Jianyong Wu (Arm Technology China)
2019-09-18  3:42   ` Richard Cochran [this message]
2019-09-18  3:42     ` Richard Cochran
2019-09-18  6:01     ` Jianyong Wu (Arm Technology China)
2019-09-18  6:01       ` Jianyong Wu (Arm Technology China)
2019-09-17 11:24 ` [RFC PATCH v2 4/6] arm64: Add hvc call service for ptp_kvm Jianyong Wu
2019-09-17 11:24   ` Jianyong Wu
2019-09-17 11:24 ` [RFC PATCH V2 5/6] Enable ptp_kvm for arm64 Jianyong Wu
2019-09-17 11:24   ` Jianyong Wu
2019-09-17 11:24 ` [PATCH 6/6] kvm: add kvm ptp capability extension " Jianyong Wu
2019-09-17 11:24   ` Jianyong Wu

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