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Date: Thu, 11 Sep 2014 10:57:25 +0100
From: Will Deacon <will.deacon@arm.com>
To: Doug Anderson <dianders@chromium.org>
Cc: Catalin Marinas <Catalin.Marinas@arm.com>,
        Mark Rutland <Mark.Rutland@arm.com>, Olof Johansson <olof@lixom.net>,
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        Thomas Gleixner <tglx@linutronix.de>,
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	<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH] clocksource: arch_timer: Fix code to use physical timers
 when requested
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On Wed, Sep 10, 2014 at 08:50:16PM +0100, Doug Anderson wrote:
> On Wed, Sep 10, 2014 at 11:46 AM, Will Deacon <will.deacon@arm.com> wrote:
> > If `where we're at' is trying to boot an ARMv7 product, then you can boot in
> > secure svc and lose virtualisation support. Looking forward to ARMv8, this
> > isn't going to work, so I'd encourage you to start thinking about getting
> > a working bootloader as a requirement.
> 
> Yup, definitely on the same page now.  With everyone working on this
> I'd imagine that there will be some nice standards worked out by the
> time real ARMv8 is ready to ship?
> 
> ...so would you say that you're in support of landing the patch to
> allow physical counters?  I know Olof has Acked the patch above, but
> it's nice if there's general agreement that it's OK.

I'm in favour of fixing the regression, yes. What I didn't understand from
the patch is where arch_timer_use_virtual is set to false for your machine,
as we need to be careful not to regress arm64 (the vdso uses the virtual
counter there).

Will