linux-kernel - RE: [PATCH 1/1] X86: Mark the Hyper-V clocksource as being continuous

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Message-ID: <A70AC0C1B7E7FD478A6BF19705461AA01109C0@IMBER.smb.curriegrad2004.ca>
Date:	Tue, 2 Dec 2014 15:57:50 -0800
From:	"Jeff Leung" <jleung@...networks.ca>
To:	"K. Y. Srinivasan" <kys@...rosoft.com>, <x86@...nel.org>,
	<gregkh@...uxfoundation.org>, <linux-kernel@...r.kernel.org>,
	<devel@...uxdriverproject.org>, <olaf@...fle.de>,
	<apw@...onical.com>, <jasowang@...hat.com>, <tglx@...utronix.de>,
	<hpa@...or.com>
Cc:	<stable@...r.kernel.org>
Subject: RE: [PATCH 1/1] X86: Mark the Hyper-V clocksource as being continuous

Does this mean that host-to guest timesync now works properly with Linux
guests?

-- Jeff

> -----Original Message-----
> From: linux-kernel-owner@...r.kernel.org
[mailto:linux-kernel-owner@...r.kernel.org]
> On Behalf Of K. Y. Srinivasan
> Sent: Tuesday, December 2, 2014 17:04
> To: x86@...nel.org; gregkh@...uxfoundation.org;
linux-kernel@...r.kernel.org;
> devel@...uxdriverproject.org; olaf@...fle.de; apw@...onical.com;
> jasowang@...hat.com; tglx@...utronix.de; hpa@...or.com
> Cc: K. Y. Srinivasan; stable@...r.kernel.org
> Subject: [PATCH 1/1] X86: Mark the Hyper-V clocksource as being
continuous
> 
> The clocksource based on Hyper-V per-partition reference count MSR is
continuous. Mark
> it accordingly.
> 
> Signed-off-by: K. Y. Srinivasan <kys@...rosoft.com>
> cc: stable@...r.kernel.org
> ---
>  arch/x86/kernel/cpu/mshyperv.c |    1 +
>  1 files changed, 1 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/x86/kernel/cpu/mshyperv.c
b/arch/x86/kernel/cpu/mshyperv.c index
> a450373..939155f 100644
> --- a/arch/x86/kernel/cpu/mshyperv.c
> +++ b/arch/x86/kernel/cpu/mshyperv.c
> @@ -107,6 +107,7 @@ static struct clocksource hyperv_cs = {
>  	.rating		= 400, /* use this when running on Hyperv*/
>  	.read		= read_hv_clock,
>  	.mask		= CLOCKSOURCE_MASK(64),
> +	.flags		= CLOCK_SOURCE_IS_CONTINUOUS,
>  };
> 
>  static void __init ms_hyperv_init_platform(void)
> --
> 1.7.4.1
> 
> --
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