On 2015/2/27 18:53, Shannon Zhao wrote: > On 2015/2/25 16:40, Hanjun Guo wrote: >> From: Graeme Gregory <graeme.gregory@xxxxxxxxxx> >> >> Add documentation for the guidelines of how to use ACPI >> on ARM64. >> >> Reviewed-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@xxxxxxx> >> Reviewed-by: Yi Li <phoenix.liyi@xxxxxxxxxx> >> Reviewed-by: Mark Langsdorf <mlangsdo@xxxxxxxxxx> >> Reviewed-by: Ashwin Chaugule <ashwinc@xxxxxxxxxxxxxx> >> Acked-by: Robert Richter <rrichter@xxxxxxxxxx> >> Signed-off-by: Graeme Gregory <graeme.gregory@xxxxxxxxxx> >> Signed-off-by: Al Stone <al.stone@xxxxxxxxxx> >> Signed-off-by: Hanjun Guo <hanjun.guo@xxxxxxxxxx> >> --- >> 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 -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
