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From: Daniel Lezcano <daniel.lezcano@linaro.org>
To: Robin Murphy <robin.murphy@arm.com>, Stephen Boyd <sboyd@codeaurora.org>
Cc: linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, tglx@linutronix.de,
	mark.rutland@arm.com
Subject: Re: [PATCH v2] clocksource/arm_arch_timer: Enable and verify MMIO access
Date: Fri, 5 Feb 2016 16:32:02 +0100	[thread overview]
Message-ID: <56B4C072.3040409@linaro.org> (raw)
In-Reply-To: <56B4BFC8.6050201@arm.com>

On 02/05/2016 04:29 PM, Robin Murphy wrote:
> On 01/02/16 19:58, Stephen Boyd wrote:
>> On 02/01, Robin Murphy wrote:
>>> So far, we have been blindly assuming that having access to a
>>> memory-mapped timer frame implies that the individual elements of that
>>> frame frame are already enabled. Whilst it's the firmware's job to give
>>> us non-secure access to frames in the first place, we should not rely
>>> on implementations always being generous enough to also configure CNTACR
>>> for those non-secure frames (e.g. [1]).
>>>
>>> Explicitly enable feature-level access per-frame, and verify that the
>>> access we want is really implemented before trying to make use of it.
>>>
>>> [1]:https://github.com/ARM-software/tf-issues/issues/170
>>>
>>> Signed-off-by: Robin Murphy <robin.murphy@arm.com>
>>> ---
>>
>> Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
>> Tested-by: Stephen Boyd <sboyd@codeaurora.org>
>
> Great, thanks!
>
> Daniel, am I right in hoping this is something you'll pick up, or should
> I be resending it to arm-soc?

I will be reviewing timers patches next week. I will take care of this one.

Thanks
   -- Daniel



-- 
  <http://www.linaro.org/> Linaro.org │ Open source software for ARM SoCs

Follow Linaro:  <http://www.facebook.com/pages/Linaro> Facebook |
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WARNING: multiple messages have this Message-ID (diff)
From: daniel.lezcano@linaro.org (Daniel Lezcano)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v2] clocksource/arm_arch_timer: Enable and verify MMIO access
Date: Fri, 5 Feb 2016 16:32:02 +0100	[thread overview]
Message-ID: <56B4C072.3040409@linaro.org> (raw)
In-Reply-To: <56B4BFC8.6050201@arm.com>

On 02/05/2016 04:29 PM, Robin Murphy wrote:
> On 01/02/16 19:58, Stephen Boyd wrote:
>> On 02/01, Robin Murphy wrote:
>>> So far, we have been blindly assuming that having access to a
>>> memory-mapped timer frame implies that the individual elements of that
>>> frame frame are already enabled. Whilst it's the firmware's job to give
>>> us non-secure access to frames in the first place, we should not rely
>>> on implementations always being generous enough to also configure CNTACR
>>> for those non-secure frames (e.g. [1]).
>>>
>>> Explicitly enable feature-level access per-frame, and verify that the
>>> access we want is really implemented before trying to make use of it.
>>>
>>> [1]:https://github.com/ARM-software/tf-issues/issues/170
>>>
>>> Signed-off-by: Robin Murphy <robin.murphy@arm.com>
>>> ---
>>
>> Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
>> Tested-by: Stephen Boyd <sboyd@codeaurora.org>
>
> Great, thanks!
>
> Daniel, am I right in hoping this is something you'll pick up, or should
> I be resending it to arm-soc?

I will be reviewing timers patches next week. I will take care of this one.

Thanks
   -- Daniel



-- 
  <http://www.linaro.org/> Linaro.org ? Open source software for ARM SoCs

Follow Linaro:  <http://www.facebook.com/pages/Linaro> Facebook |
<http://twitter.com/#!/linaroorg> Twitter |
<http://www.linaro.org/linaro-blog/> Blog

  reply	other threads:[~2016-02-05 15:32 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-02-01 12:00 [PATCH v2] clocksource/arm_arch_timer: Enable and verify MMIO access Robin Murphy
2016-02-01 12:00 ` Robin Murphy
2016-02-01 13:44 ` Mark Rutland
2016-02-01 13:44   ` Mark Rutland
2016-02-01 19:58 ` Stephen Boyd
2016-02-01 19:58   ` Stephen Boyd
2016-02-05 15:29   ` Robin Murphy
2016-02-05 15:29     ` Robin Murphy
2016-02-05 15:32     ` Daniel Lezcano [this message]
2016-02-05 15:32       ` Daniel Lezcano
2016-02-05 15:34       ` Robin Murphy
2016-02-05 15:34         ` Robin Murphy
2016-02-08 14:00 ` Daniel Lezcano
2016-02-08 14:00   ` Daniel Lezcano
2016-02-08 14:09   ` Marc Zyngier
2016-02-08 14:09     ` Marc Zyngier
2016-02-08 14:30 ` Daniel Lezcano
2016-02-08 14:30   ` Daniel Lezcano

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