Re: [PATCH 3.10 126/129] clocksource: arch_timer: use virtualcounters

From: Greg Kroah-Hartman
Date: Tue Jan 07 2014 - 13:50:19 EST

On Tue, Jan 07, 2014 at 10:09:50AM +0000, Mark Rutland wrote:
> Hi Greg,
> On Mon, Jan 06, 2014 at 10:39:15PM +0000, Greg Kroah-Hartman wrote:
> > 3.10-stable review patch. If anyone has any objections, please let me know.
> This patch alone may break ARM systems booted at hyp mode or when KVM is
> in use, causing CPUs to have different views of time or for a given
> CPU's view of time to jump backwards.
> The following two commits in mainline fix those two problems by ensuring
> all CPUs have the same virtual timer offset (zero), and maintaining it
> across KVM world switches. On arm64 the requisite CNTVOFF zeroing is
> already present in linux-3.10.y.
> 0af0b189abf7 (ARM: hyp: initialize CNTVOFF to zero)
> f793c23ebbe5 (ARM: KVM: arch_timers: zero CNTVOFF upon return to host)

Thanks, I've now queued up both of these patches as well. With that, we
should be ok, right?

greg k-h
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