From: Arun R Bharadwaj <arun@linux.vnet.ibm.com>
To: Peter Zijlstra <a.p.zijlstra@chello.nl>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Ingo Molnar <mingo@elte.hu>,
Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>,
Dipankar Sarma <dipankar@in.ibm.com>,
Balbir Singh <balbir@in.ibm.com>,
Arjan van de Ven <arjan@infradead.org>,
Arun Bharadwaj <arun@linux.vnet.ibm.com>
Cc: linux-arch@vger.kernel.org, linux-acpi@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: [v8 PATCH 6/8]: POWER: add a default_idle idle loop for POWER.
Date: Thu, 8 Oct 2009 15:23:48 +0530 [thread overview]
Message-ID: <20091008095348.GG20595@linux.vnet.ibm.com> (raw)
In-Reply-To: <20091008094828.GA20595@linux.vnet.ibm.com>
* Arun R Bharadwaj <arun@linux.vnet.ibm.com> [2009-10-08 15:18:28]:
In arch/powerpc/kernel/idle.c create a default_idle() routine by moving
the failover condition of the cpu_idle() idle loop. This is needed by
cpuidle infrastructure to call default_idle when other idle routines
are not yet registered. Functionality remains the same, but the code is
slightly moved around.
Signed-off-by: Arun R Bharadwaj <arun@linux.vnet.ibm.com>
---
arch/powerpc/Kconfig | 3 +++
arch/powerpc/include/asm/system.h | 1 +
arch/powerpc/kernel/idle.c | 6 ++++++
3 files changed, 10 insertions(+)
Index: linux.trees.git/arch/powerpc/Kconfig
===================================================================
--- linux.trees.git.orig/arch/powerpc/Kconfig
+++ linux.trees.git/arch/powerpc/Kconfig
@@ -94,6 +94,9 @@ config ARCH_HAS_ILOG2_U64
config ARCH_HAS_CPU_IDLE_WAIT
def_bool y
+config ARCH_HAS_DEFAULT_IDLE
+ def_bool y
+
config GENERIC_HWEIGHT
bool
default y
Index: linux.trees.git/arch/powerpc/include/asm/system.h
===================================================================
--- linux.trees.git.orig/arch/powerpc/include/asm/system.h
+++ linux.trees.git/arch/powerpc/include/asm/system.h
@@ -218,6 +218,7 @@ extern unsigned long klimit;
extern void *alloc_maybe_bootmem(size_t size, gfp_t mask);
extern void *zalloc_maybe_bootmem(size_t size, gfp_t mask);
+extern void default_idle(void);
extern int powersave_nap; /* set if nap mode can be used in idle loop */
/*
Index: linux.trees.git/arch/powerpc/kernel/idle.c
===================================================================
--- linux.trees.git.orig/arch/powerpc/kernel/idle.c
+++ linux.trees.git/arch/powerpc/kernel/idle.c
@@ -113,6 +113,12 @@ void cpu_idle_wait(void)
}
EXPORT_SYMBOL_GPL(cpu_idle_wait);
+void default_idle(void)
+{
+ HMT_low();
+ HMT_very_low();
+}
+
int powersave_nap;
#ifdef CONFIG_SYSCTL
next prev parent reply other threads:[~2009-10-08 9:53 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-08 9:48 [v8 PATCH 0/8]: cpuidle: Cleanup cpuidle/ Introduce cpuidle to POWER Arun R Bharadwaj
2009-10-08 9:49 ` [v8 PATCH 1/8]: cpuidle: cleanup drivers/cpuidle/cpuidle.c Arun R Bharadwaj
2009-10-12 11:36 ` Balbir Singh
2009-10-14 6:24 ` Arun R Bharadwaj
2009-10-08 9:50 ` [v8 PATCH 2/8]: cpuidle: implement a list based approach to register a set of idle routines Arun R Bharadwaj
2009-10-08 10:36 ` Peter Zijlstra
2009-10-08 10:42 ` Arun R Bharadwaj
2009-10-08 10:50 ` Peter Zijlstra
2009-10-08 11:01 ` Arun R Bharadwaj
2009-10-08 11:25 ` Peter Zijlstra
2009-10-08 12:01 ` Arun R Bharadwaj
2009-10-08 12:25 ` Peter Zijlstra
2009-10-08 13:10 ` Vaidyanathan Srinivasan
2009-10-09 9:39 ` Arun R Bharadwaj
2009-10-12 18:00 ` Andi Kleen
2009-10-14 6:17 ` Arun R Bharadwaj
2009-10-14 7:18 ` Andi Kleen
2009-10-15 6:06 ` Arun R Bharadwaj
2009-10-08 9:51 ` [v8 PATCH 3/8]: x86: refactor x86 idle power management code and remove all instances of pm_idle Arun R Bharadwaj
2009-10-08 9:52 ` [v8 PATCH 4/8]: POWER: enable cpuidle for POWER Arun R Bharadwaj
2009-10-08 9:53 ` [v8 PATCH 5/8]: pSeries/cpuidle: remove dedicate/shared idle loops, which will be moved to arch/powerpc/platforms/pseries/processor_idle.c Arun R Bharadwaj
2009-10-08 9:53 ` Arun R Bharadwaj [this message]
2009-10-08 9:54 ` [v8 PATCH 7/8]: pSeries: implement pSeries processor idle module Arun R Bharadwaj
2009-10-08 9:56 ` [v8 PATCH 8/8]: POWER: Enable default_idle when power_save=off Arun R Bharadwaj
2009-10-12 10:01 ` [v8 PATCH 0/8]: cpuidle: Cleanup cpuidle/ Introduce cpuidle to POWER Balbir Singh
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20091008095348.GG20595@linux.vnet.ibm.com \
--to=arun@linux.vnet.ibm.com \
--cc=a.p.zijlstra@chello.nl \
--cc=arjan@infradead.org \
--cc=balbir@in.ibm.com \
--cc=benh@kernel.crashing.org \
--cc=dipankar@in.ibm.com \
--cc=linux-acpi@vger.kernel.org \
--cc=linux-arch@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=mingo@elte.hu \
--cc=svaidy@linux.vnet.ibm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).