Re: [PATCH v6 5/5] ACPI : enable ACPI_PROCESSOR_IDLE on ARM64

From: Sudeep Holla
Date: Mon Jun 27 2016 - 11:06:53 EST




On 27/06/16 16:05, Daniel Lezcano wrote:
On 06/27/2016 05:03 PM, Sudeep Holla wrote:
Hi Daniel,

On 27/06/16 15:33, Daniel Lezcano wrote:
On 06/14/2016 04:48 PM, Sudeep Holla wrote:
Now that ACPI processor idle driver supports LPI(Low Power Idle), lets
enable ACPI_PROCESSOR_IDLE for ARM64 too.

This patch just removes the IA64 and X86 dependency on
ACPI_PROCESSOR_IDLE

Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: "Rafael J. Wysocki" <rjw@xxxxxxxxxxxxx>
Signed-off-by: Sudeep Holla <sudeep.holla@xxxxxxx>
---

Hi Sudeep,

now that ACPI processor supports ARM64 did you check the
CPUIDLE_DRIVER_STATE_START trick in the code and its derivative ?


No, that is used only for C-State and ARM64 doesn't support it.
Patch 1/5 puts all the C-State code under #ifdef so that it's not
compiled on ARM64.

I deleted the patch 2/5 but there is a place where:


Sorry, I don't follow what you mean by that.

I meant I just deleted from my mailbox the patch 2/5, so I can't do
inline comment.


Ah ok, anyways LPI always starts from index 0. IIUC that was your main
concern.

--
Regards,
Sudeep