From: Catalin Marinas <catalin.marinas@arm.com>
To: Mark Brown <broonie@kernel.org>
Cc: Will Deacon <Will.Deacon@arm.com>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
Viresh Kumar <viresh.kumar@linaro.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>,
"linaro-kernel@lists.linaro.org" <linaro-kernel@lists.linaro.org>,
Mark Brown <broonie@linaro.org>
Subject: Re: [PATCH 2/3] arm64: Add big.LITTLE switcher stub
Date: Fri, 9 May 2014 18:47:38 +0100 [thread overview]
Message-ID: <20140509174738.GP7950@arm.com> (raw)
In-Reply-To: <1399653631-4938-2-git-send-email-broonie@kernel.org>
On Fri, May 09, 2014 at 05:40:30PM +0100, Mark Brown wrote:
> From: Mark Brown <broonie@linaro.org>
>
> The big.LITTLE cpufreq driver is useful on arm64 big.LITTLE systems even
> without IKS support since it implements support for clusters with shared
> clocks (a common big.LITTLE configuration). In order to allow it to be
> built provide the non-IKS stubs for arm64, enabling cpufreq with all the
> cores available.
Have you thought of patching the actual cpufreq driver? Are you adding
this code just to avoid compiler errors on arm64 with this driver?
> It may make sense to make an asm-generic version of these stubs instead
asm-generic/bL_switcher.h? I take it as a good joke ;)
> but
> given that there's only likely to be these two architectures using the code
> and asm-generic stubs also need per architecture updates it's probably more
> trouble than it's worth.
Exactly.
--
Catalin
WARNING: multiple messages have this Message-ID (diff)
From: catalin.marinas@arm.com (Catalin Marinas)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/3] arm64: Add big.LITTLE switcher stub
Date: Fri, 9 May 2014 18:47:38 +0100 [thread overview]
Message-ID: <20140509174738.GP7950@arm.com> (raw)
In-Reply-To: <1399653631-4938-2-git-send-email-broonie@kernel.org>
On Fri, May 09, 2014 at 05:40:30PM +0100, Mark Brown wrote:
> From: Mark Brown <broonie@linaro.org>
>
> The big.LITTLE cpufreq driver is useful on arm64 big.LITTLE systems even
> without IKS support since it implements support for clusters with shared
> clocks (a common big.LITTLE configuration). In order to allow it to be
> built provide the non-IKS stubs for arm64, enabling cpufreq with all the
> cores available.
Have you thought of patching the actual cpufreq driver? Are you adding
this code just to avoid compiler errors on arm64 with this driver?
> It may make sense to make an asm-generic version of these stubs instead
asm-generic/bL_switcher.h? I take it as a good joke ;)
> but
> given that there's only likely to be these two architectures using the code
> and asm-generic stubs also need per architecture updates it's probably more
> trouble than it's worth.
Exactly.
--
Catalin
next prev parent reply other threads:[~2014-05-09 17:48 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-09 16:40 [PATCH 1/3] arm64: Enable OPP Mark Brown
2014-05-09 16:40 ` Mark Brown
2014-05-09 16:40 ` [PATCH 2/3] arm64: Add big.LITTLE switcher stub Mark Brown
2014-05-09 16:40 ` Mark Brown
2014-05-09 17:05 ` Sudeep Holla
2014-05-09 17:05 ` Sudeep Holla
2014-05-09 17:50 ` Mark Brown
2014-05-09 17:50 ` Mark Brown
2014-05-09 18:57 ` Sudeep Holla
2014-05-09 18:57 ` Sudeep Holla
2014-05-09 19:29 ` Mark Brown
2014-05-09 19:29 ` Mark Brown
2014-05-12 8:34 ` Sudeep Holla
2014-05-12 8:34 ` Sudeep Holla
2014-05-12 12:17 ` Mark Brown
2014-05-12 12:17 ` Mark Brown
2014-05-12 14:09 ` Mark Hambleton
2014-05-12 14:09 ` Mark Hambleton
2014-05-09 17:47 ` Catalin Marinas [this message]
2014-05-09 17:47 ` Catalin Marinas
2014-05-09 18:01 ` Mark Brown
2014-05-09 18:01 ` Mark Brown
2014-05-11 3:29 ` Nicolas Pitre
2014-05-11 3:29 ` Nicolas Pitre
2014-05-09 16:40 ` [PATCH 3/3] cpufreq: Enable big.LITTLE cpufreq driver on arm64 Mark Brown
2014-05-09 16:40 ` Mark Brown
2014-05-12 4:16 ` Viresh Kumar
2014-05-12 4:16 ` Viresh Kumar
2014-05-19 23:19 ` Rafael J. Wysocki
2014-05-19 23:19 ` Rafael J. Wysocki
2014-05-19 23:07 ` Mark Brown
2014-05-19 23:07 ` Mark Brown
2014-05-19 23:36 ` Rafael J. Wysocki
2014-05-19 23:36 ` Rafael J. Wysocki
2014-06-05 10:04 ` Catalin Marinas
2014-06-05 10:04 ` Catalin Marinas
2014-06-05 12:10 ` Rafael J. Wysocki
2014-06-05 12:10 ` Rafael J. Wysocki
2014-05-09 17:02 ` [PATCH 1/3] arm64: Enable OPP menon.nishanth
2014-05-09 17:02 ` menon.nishanth at gmail.com
2014-05-09 17:11 ` Mark Brown
2014-05-09 17:11 ` Mark Brown
2014-05-09 17:17 ` menon.nishanth
2014-05-09 17:17 ` menon.nishanth at gmail.com
2014-05-09 18:18 ` Mark Brown
2014-05-09 18:18 ` Mark Brown
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