On 2014-1-17 22:34, Sudeep Holla wrote:

On 17/01/14 12:25, Hanjun Guo wrote:

quoted

Add Kconfigs to build ACPI on ARM64, and make ACPI runable on ARM64.

acpi_idle driver is x86/IA64 dependent now, so make CONFIG_ACPI_PROCESSOR
depends on X86 || IA64, and implement it on ARM/ARM64 in the furture.

In order to make arm-core.c can both run on ARM and ARM64, introduce
CONFIG_ACPI_ARM to support it.

Signed-off-by: Graeme Gregory <redacted>
Signed-off-by: Al Stone <redacted>
Signed-off-by: Hanjun Guo <redacted>
---
 arch/arm64/Kconfig         |    2 ++
 drivers/acpi/Kconfig       |   11 ++++++++---
 drivers/acpi/plat/Makefile |    2 +-
 3 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 6d4dd22..2b1fb1d 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig

@@ -279,6 +279,8 @@ source "net/Kconfig"
 
 source "drivers/Kconfig"
 
+source "drivers/acpi/Kconfig"
+
 source "fs/Kconfig"
 
 source "arch/arm64/kvm/Kconfig"

diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index 4770de5..cae5dc9 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig

@@ -2,13 +2,16 @@
 # ACPI Configuration
 #
 
+config ACPI_ARM
+	bool
+
 menuconfig ACPI
 	bool "ACPI (Advanced Configuration and Power Interface) Support"
 	depends on !IA64_HP_SIM
-	depends on IA64 || X86
-	depends on PCI
+	depends on ((IA64 || X86) && PCI) || ARM64
 	select PNP
-	default y
+	select ACPI_ARM if ARM64
+	default y if !ARM64
 	help
 	  Advanced Configuration and Power Interface (ACPI) support for 
 	  Linux requires an ACPI-compliant platform (hardware/firmware),

@@ -149,6 +152,7 @@ config ACPI_PROCESSOR
 	tristate "Processor"
 	select THERMAL
 	select CPU_IDLE
+	depends on X86 || IA64

This doesn't look correct to me. You are disabling Perf/Idle/Thermal/Throttling
support for ARM64. Any particular reason ?

As I said in the change log, acpi_idle driver is x86/IA64 dependent now,
we should revisit it later for these drivers on ARM64.

Since this is the ARM ACPI core patches, I think we can implement it later.

Also this is conflicting with other change where you are adding/exporting
boot_option_idle_override which is mainly used in processor_idle and that's
disabled for ARM64 here.

boot_option_idle_override is used in processor_core.c and it is the common
file used by every processor drivers including the processor_idle driver,
if I didn't introduce boot_option_idle_override there will be compile errors.

Thanks
Hanjun