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From: Hollis Blanchard <hollisb@us.ibm.com>
To: kvm-ppc-devel@lists.sourceforge.net
Subject: Re: [kvm-ppc-devel] [PATCH] [v5] Add idle wait support for 44x
	platforms
Date: Tue, 8 Apr 2008 14:43:46 -0500
References: <df0f79b7b4ab628887c2.1207673354@thinkpadL>
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On Tuesday 08 April 2008 11:49:14 Jerone Young wrote:
> 2 files changed, 77 insertions(+), 1 deletion(-)
> arch/powerpc/platforms/44x/Makefile |    2
> arch/powerpc/platforms/44x/idle.c   |   76
> +++++++++++++++++++++++++++++++++++
>
>
> Updates: Now setting MSR_WE is now default
>          Tested on hardware platforms bamboo & sequioa and appears
>          things are working fine on actually hardware!
>
> This patch adds the ability for the CPU to go into wait state while in
> cpu_idle loop. This helps virtulization solutions know when the guest Linux
> kernel is in an idle state. There are two ways to do it.
>
> Command line
> 	idle=spin <-- CPU will spin
> 	idle=wait <-- set CPU into wait state when idle (default)
>
>
> Signed-off-by: Jerone Young <jyoung5@us.ibm.com>

Acked-by: Hollis Blanchard <hollisb@us.ibm.com>

-- 
Hollis Blanchard
IBM Linux Technology Center