ACPI(Advanced Configuration and Power Interface), is a Power Management and configuration standard allowing the operating system to control the amount of power each device is given (allowing it to put certain devices on standby or power-off for example). It is also used to control and/or check thermal zones (temperature sensors, fan speeds, etc), battery levels, PCI IRQ routing, CPUs, NUMA domains and many other things.
Changes in v4: - Incoporated Bin's review comments.
Saket Sinha (3): x86: Generate a valid ACPI table x86: Add ACPI table support to QEMU x86: Add DSDT table for supporting ACPI on QEMU
arch/x86/Kconfig | 9 + arch/x86/cpu/qemu/Makefile | 1 + arch/x86/cpu/qemu/acpi.c | 161 ++++++++++++ arch/x86/cpu/qemu/acpi/cpu-hotplug.asl | 78 ++++++ arch/x86/cpu/qemu/acpi/dbug.asl | 26 ++ arch/x86/cpu/qemu/acpi/hpet.asl | 33 +++ arch/x86/cpu/qemu/acpi/isa.asl | 102 ++++++++ arch/x86/cpu/qemu/acpi/pci-crs.asl | 61 +++++ arch/x86/cpu/qemu/dsdt.asl | 414 +++++++++++++++++++++++++++++++ arch/x86/include/asm/acpi_table.h | 398 ++++++++++++++++++++++++++++++ arch/x86/lib/Makefile | 1 + arch/x86/lib/acpi_table.c | 438 +++++++++++++++++++++++++++++++++ arch/x86/lib/tables.c | 5 + scripts/Makefile.lib | 11 + 14 files changed, 1738 insertions(+) create mode 100644 arch/x86/cpu/qemu/acpi.c create mode 100644 arch/x86/cpu/qemu/acpi/cpu-hotplug.asl create mode 100644 arch/x86/cpu/qemu/acpi/dbug.asl create mode 100644 arch/x86/cpu/qemu/acpi/hpet.asl create mode 100644 arch/x86/cpu/qemu/acpi/isa.asl create mode 100644 arch/x86/cpu/qemu/acpi/pci-crs.asl create mode 100644 arch/x86/cpu/qemu/dsdt.asl create mode 100644 arch/x86/include/asm/acpi_table.h create mode 100644 arch/x86/lib/acpi_table.c