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

From: Shannon Zhao <zhaoshenglong@huawei.com>
To: Hanjun Guo <hanjun.guo@linaro.org>,
	Catalin Marinas <catalin.marinas@arm.com>,
	"Rafael J. Wysocki" <rjw@rjwysocki.net>,
	"Will Deacon" <will.deacon@arm.com>,
	Olof Johansson <olof@lixom.net>,
	Grant Likely <grant.likely@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>,
	Ashwin Chaugule <ashwinc@codeaurora.org>,
	Lorenzo Pieralisi <Lorenzo.Pieralisi@arm.com>,
	Robert Richter <rric@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
	"Graeme Gregory" <graeme.gregory@linaro.org>,
	<linaro-acpi@lists.linaro.org>,
	"Marc Zyngier" <marc.zyngier@arm.com>,
	Jon Masters <jcm@redhat.com>, Timur Tabi <timur@codeaurora.org>,
	<linux-kernel@vger.kernel.org>, Al Stone <al.stone@linaro.org>,
	<linux-acpi@vger.kernel.org>, Mark Brown <broonie@kernel.org>,
	<suravee.suthikulpanit@amd.com>,
	Sudeep Holla <Sudeep.Holla@arm.com>,
	"Huangpeng (Peter)" <peter.huangpeng@huawei.com>,
	<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH v9 20/21] Documentation: ACPI for ARM64
Date: Fri, 27 Feb 2015 19:13:38 +0800	[thread overview]
Message-ID: <54F05162.7010609@huawei.com> (raw)
In-Reply-To: <54F04C92.6010206@huawei.com>

On 2015/2/27 18:53, Shannon Zhao wrote:
> On 2015/2/25 16:40, Hanjun Guo wrote:
>> From: Graeme Gregory <graeme.gregory@linaro.org>
>>
>> Add documentation for the guidelines of how to use ACPI
>> on ARM64.
>>
>> Reviewed-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
>> Reviewed-by: Yi Li <phoenix.liyi@huawei.com>
>> Reviewed-by: Mark Langsdorf <mlangsdo@redhat.com>
>> Reviewed-by: Ashwin Chaugule <ashwinc@codeaurora.org>
>> Acked-by: Robert Richter <rrichter@cavium.com>
>> Signed-off-by: Graeme Gregory <graeme.gregory@linaro.org>
>> Signed-off-by: Al Stone <al.stone@linaro.org>
>> Signed-off-by: Hanjun Guo <hanjun.guo@linaro.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