From: Hanjun Guo <hanjun.guo@linaro.org>
To: Sudeep Holla <Sudeep.Holla@arm.com>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Catalin Marinas <Catalin.Marinas@arm.com>,
Will Deacon <Will.Deacon@arm.com>,
Russell King - ARM Linux <linux@arm.linux.org.uk>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
"linux-acpi@vger.kernel.org" <linux-acpi@vger.kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"grant.likely@linaro.org" <grant.likely@linaro.org>,
Matthew Garrett <mjg59@srcf.ucam.org>,
Olof Johansson <olof@lixom.net>,
Linus Walleij <linus.walleij@linaro.org>,
Bjorn Helgaas <bhelgaas@google.com>,
"rob.herring@calxeda.com" <rob.herring@calxeda.com>,
Mark Rutland <Mark.Rutland@arm.com>,
Jon Masters <jonathan@jonmasters.org>,
"patches@linaro.org" <patches@linaro.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linaro-kernel@lists.linaro.org" <linaro-kernel@lists.linaro.org>,
"linaro-acpi@lists.linaro.org" <linaro-acpi@lists.linaro.org>
Subject: Re: [PATCH 1/3] ACPI / idle: Move idle_boot_override out of the arch directory
Date: Sat, 18 Jan 2014 11:52:18 +0800 [thread overview]
Message-ID: <52D9FA72.5020505@linaro.org> (raw)
In-Reply-To: <52D9F8E8.8030602@linaro.org>
On 2014-1-18 11:45, Hanjun Guo wrote:
> On 2014-1-17 20:06, Sudeep Holla wrote:
>> On 17/01/14 02:03, Hanjun Guo wrote:
>>> Move idle_boot_override out of the arch directory to be a single enum
>>> including both platforms values, this will make it rather easier to
>>> avoid ifdefs around which definitions are for which processor in
>>> generally used ACPI code.
>>>
>>> IDLE_FORCE_MWAIT for IA64 is not used anywhere, so romove it.
>>>
>>> No functional change in this patch.
>>>
>>> Suggested-by: Alan <gnomes@lxorguk.ukuu.org.uk>
>>> Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
>>> ---
[...]
>>> diff --git a/include/linux/cpu.h b/include/linux/cpu.h
>>> index 03e235ad..e324561 100644
>>> --- a/include/linux/cpu.h
>>> +++ b/include/linux/cpu.h
>>> @@ -220,6 +220,14 @@ void cpu_idle(void);
>>>
>>> void cpu_idle_poll_ctrl(bool enable);
>>>
>>> +enum idle_boot_override {
>>> + IDLE_NO_OVERRIDE = 0,
>>> + IDLE_HALT,
>>> + IDLE_NOMWAIT,
>>> + IDLE_POLL,
>>> + IDLE_POWERSAVE_OFF
>>> +};
>>> +
>>
>> I do understand the idea behind this change, but IMO HALT and MWAIT are x86
>> specific and may not make sense for other architectures.
>
> yes, this is the strange part, the value is arch-dependent.
>
>>
>> It will also require every architecture using ACPI to export
>> boot_option_idle_override which may not be really required.
>
> so, how about forget this patch and move boot_option_idle_override
> related code into arch directory such as arch/x86/acpi/boot.c for
> x86?
The general idea is that we can move all the arch-dependent codes
in ACPI driver to arch directory, then make codes in drivers/acpi/
arch independent.
Thanks
Hanjun
next prev parent reply other threads:[~2014-01-18 3:52 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-01-17 2:03 [PATCH 0/3] ACPI: Some patches to prepare for running ACPI on !x86 and !ia64 Hanjun Guo
2014-01-17 2:03 ` [PATCH 1/3] ACPI / idle: Move idle_boot_override out of the arch directory Hanjun Guo
2014-01-17 12:06 ` Sudeep Holla
2014-01-18 3:45 ` Hanjun Guo
2014-01-18 3:52 ` Hanjun Guo [this message]
2014-01-18 13:47 ` Rafael J. Wysocki
2014-01-20 14:08 ` Hanjun Guo
2014-01-20 23:34 ` Rafael J. Wysocki
2014-01-21 3:38 ` Hanjun Guo
2014-01-17 2:03 ` [PATCH 2/3] ACPI / processor_core: Rework _PDC related stuff to make it more arch-independent Hanjun Guo
2014-01-17 2:03 ` [PATCH 3/3] ACPI: Introduce map_gic_id() to get apic id from MADT or _MAT method Hanjun Guo
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