linux-kernel - Re: [PATCH v9 20/21] Documentation: ACPI for ARM64

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Message-ID: <54F05162.7010609@huawei.com>
Date:	Fri, 27 Feb 2015 19:13:38 +0800
From:	Shannon Zhao <zhaoshenglong@...wei.com>
To:	Hanjun Guo <hanjun.guo@...aro.org>,
	Catalin Marinas <catalin.marinas@....com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	"Will Deacon" <will.deacon@....com>,
	Olof Johansson <olof@...om.net>,
	Grant Likely <grant.likely@...aro.org>
CC:	Mark Rutland <mark.rutland@....com>,
	Ashwin Chaugule <ashwinc@...eaurora.org>,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@....com>,
	Robert Richter <rric@...nel.org>,
	Arnd Bergmann <arnd@...db.de>,
	"Graeme Gregory" <graeme.gregory@...aro.org>,
	<linaro-acpi@...ts.linaro.org>,
	"Marc Zyngier" <marc.zyngier@....com>,
	Jon Masters <jcm@...hat.com>,
	Timur Tabi <timur@...eaurora.org>,
	<linux-kernel@...r.kernel.org>, Al Stone <al.stone@...aro.org>,
	<linux-acpi@...r.kernel.org>, Mark Brown <broonie@...nel.org>,
	<suravee.suthikulpanit@....com>,
	Sudeep Holla <Sudeep.Holla@....com>,
	"Huangpeng (Peter)" <peter.huangpeng@...wei.com>,
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v9 20/21] Documentation: ACPI for ARM64

On 2015/2/27 18:53, Shannon Zhao wrote:
> On 2015/2/25 16:40, Hanjun Guo wrote:
>> From: Graeme Gregory <graeme.gregory@...aro.org>
>>
>> Add documentation for the guidelines of how to use ACPI
>> on ARM64.
>>
>> Reviewed-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>
>> Reviewed-by: Yi Li <phoenix.liyi@...wei.com>
>> Reviewed-by: Mark Langsdorf <mlangsdo@...hat.com>
>> Reviewed-by: Ashwin Chaugule <ashwinc@...eaurora.org>
>> Acked-by: Robert Richter <rrichter@...ium.com>
>> Signed-off-by: Graeme Gregory <graeme.gregory@...aro.org>
>> Signed-off-by: Al Stone <al.stone@...aro.org>
>> Signed-off-by: Hanjun Guo <hanjun.guo@...aro.org>
>> ---
>>  Documentation/arm64/arm-acpi.txt | 506 +++++++++++++++++++++++++++++++++++++++
>>  1 file changed, 506 insertions(+)
>>  create mode 100644 Documentation/arm64/arm-acpi.txt
>>
>> diff --git a/Documentation/arm64/arm-acpi.txt b/Documentation/arm64/arm-acpi.txt
>> new file mode 100644
>> index 0000000..24cf832
>> --- /dev/null
>> +++ b/Documentation/arm64/arm-acpi.txt
>> @@ -0,0 +1,506 @@
>> +ACPI on ARMv8 Servers
>> +---------------------
>> +ACPI can be used for ARMv8 general purpose servers designed to follow
>> +the ARM SBSA (Server Base System Architecture) [0] and SBBR (Server
>> +Base Boot Requirements) [1] specifications.  Please note that the SBBR
>> +can be retrieved simply by visiting [1], but the SBSA is currently only
>> +available to those with an ARM login due to ARM IP licensing concerns.
>> +
>> +The ARMv8 kernel implements the reduced hardware model of ACPI version
>> +5.1 or later.  Links to the specification and all external documents
>> +it refers to are managed by the UEFI Forum.  The specification is
>> +available at http://www.uefi.org/specifications and documents referenced
>> +by the specification can be found via http://www.uefi.org/acpi.
>> +
>> +If an ARMv8 system does not meet the requirements of the SBSA and SBBR,
>> +or cannot be described using the mechanisms defined in the required ACPI
>> +specifications, then ACPI may not be a good fit for the hardware.
>> +
>> +While the documents mentioned above set out the requirements for building
>> +industry-standard ARMv8 servers, they also apply to more than one operating
>> +system.  The purpose of this document is to describe the interaction between
>> +ACPI and Linux only, on an ARMv8 system -- that is, what Linux expects of
>> +ACPI and what ACPI can expect of Linux.
>> +
>> +
> 
> Here. Two blank lines.
> 
>> +Why ACPI on ARM?
> 
> 
not here. ignore this :-)

-- 
Thanks,
Shannon

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