linux-kernel - Re: [PATCH v4 4/5] arm64: add support for ACPI Low Power Idle(LPI)

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <3620725.8soc3SaFWB@vostro.rjw.lan>
Date:	Wed, 11 May 2016 02:07:38 +0200
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	Sudeep Holla <sudeep.holla@....com>
Cc:	linux-acpi@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
	Al Stone <al.stone@...aro.org>,
	Prashanth Prakash <pprakash@...eaurora.org>,
	Ashwin Chaugule <ashwin.chaugule@...aro.org>,
	Mark Rutland <mark.rutland@....com>
Subject: Re: [PATCH v4 4/5] arm64: add support for ACPI Low Power Idle(LPI)

On Tuesday, April 19, 2016 01:30:12 PM Sudeep Holla wrote:
> This patch adds appropriate callbacks to support ACPI Low Power Idle
> (LPI) on ARM64.
> 
> It also selects ARCH_SUPPORTS_ACPI_PROCESSOR_LPI if ACPI is enabled
> on ARM64.

Can you remind me why we need the ARCH_SUPPORTS_ACPI_PROCESSOR_LPI thing in
addition to the previously defined ARCH_SUPPORTS_ACPI_PROCESSOR_CSTATE?

I thought supporting LPI would not require an arch Kconfig option.

Thanks,
Rafael