linux-kernel - Re: [PATCH v5 2/2] x86, mwaitt: introduce mwaix delay with a configurable timer

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Message-ID: <20150615141458.GC28310@hr-slim.amd.com>
Date:	Mon, 15 Jun 2015 22:14:59 +0800
From:	Huang Rui <ray.huang@....com>
To:	Peter Zijlstra <peterz@...radead.org>
CC:	Borislav Petkov <bp@...e.de>,
	Andy Lutomirski <luto@...capital.net>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...nel.org>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>,
	Len Brown <lenb@...nel.org>,
	John Stultz <john.stultz@...aro.org>,
	Frédéric Weisbecker <fweisbec@...il.com>,
	<linux-kernel@...r.kernel.org>, <x86@...nel.org>,
	Fengguang Wu <fengguang.wu@...el.com>,
	Aaron Lu <aaron.lu@...el.com>,
	Suravee Suthikulanit <suravee.suthikulpanit@....com>,
	Tony Li <tony.li@....com>, Ken Xue <ken.xue@....com>
Subject: Re: [PATCH v5 2/2] x86, mwaitt: introduce mwaix delay with a
 configurable timer

On Mon, Jun 15, 2015 at 12:57:18PM +0200, Peter Zijlstra wrote:
> On Mon, Jun 15, 2015 at 06:48:04PM +0800, Huang Rui wrote:
> > diff --git a/arch/x86/include/asm/mwait.h b/arch/x86/include/asm/mwait.h
> > index 1fbc89d..47f3540 100644
> > --- a/arch/x86/include/asm/mwait.h
> > +++ b/arch/x86/include/asm/mwait.h
> > @@ -14,6 +14,9 @@
> >  #define CPUID5_ECX_INTERRUPT_BREAK	0x2
> >  
> >  #define MWAIT_ECX_INTERRUPT_BREAK	0x1
> > +#define MWAITX_ECX_TIMER_ENABLE		BIT(1)
> > +#define MWAITX_MAX_LOOPS		((u32)-1)
> > +#define MWAITX_DISABLE_CSTATES		0xf
> >  
> >  static inline void __monitor(const void *eax, unsigned long ecx,
> >  			     unsigned long edx)
> 
> Should this hunk not be part of the previous patch?
> 

This definitions are used to implement delay function, so I put it at
this patch. :)

Thanks,
Rui
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