linux-kernel - Re: [PATCH 7/9] powerpc/powernv: Add platform support for stop instruction

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Message-ID: <57284536.8040202@linux.vnet.ibm.com>
Date:	Tue, 03 May 2016 11:59:10 +0530
From:	Shreyas B Prabhu <shreyas@...ux.vnet.ibm.com>
To:	Michael Neuling <mikey@...ling.org>, mpe@...erman.id.au
CC:	linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 7/9] powerpc/powernv: Add platform support for stop instruction



On 05/03/2016 10:55 AM, Michael Neuling wrote:
> 
>> diff --git a/arch/powerpc/include/asm/cputable.h b/arch/powerpc/include/asm/cputable.h
>> index df4fb5f..a4739a1 100644
>> --- a/arch/powerpc/include/asm/cputable.h
>> +++ b/arch/powerpc/include/asm/cputable.h
>> @@ -205,6 +205,7 @@ enum {
>>  #define CPU_FTR_DABRX			LONG_ASM_CONST(0x0800000000000000)
>>  #define CPU_FTR_PMAO_BUG		LONG_ASM_CONST(0x1000000000000000)
>>  #define CPU_FTR_SUBCORE			LONG_ASM_CONST(0x2000000000000000)
>> +#define CPU_FTR_STOP_INST		LONG_ASM_CONST(0x4000000000000000)
> 
> In general, we are putting all the POWER9 features under CPU_FTR_ARCH_300.
> Is there a reason you need this separate bit?
> 

No I don't need a separate bit, I'll use CPU_FTR_ARCH_300.

Thanks,
Shreyas

> CPU_FTR bits are fairly scarce these days.
> 
> Mikey
>