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?