linux-kernel - Re: [PATCH V2 2/5] powerpc, perf: Add basic assembly code to read BHRB entries on POWER8

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Message-ID: <516E1E6C.2040106@linux.vnet.ibm.com>
Date:	Wed, 17 Apr 2013 09:30:44 +0530
From:	Anshuman Khandual <khandual@...ux.vnet.ibm.com>
To:	Segher Boessenkool <segher@...nel.crashing.org>
CC:	linuxppc-dev@...abs.org, linux-kernel@...r.kernel.org,
	mikey@...ling.org
Subject: Re: [PATCH V2 2/5] powerpc, perf: Add basic assembly code to read
 BHRB entries on POWER8

On 04/16/2013 10:53 PM, Segher Boessenkool wrote:
>> +/* r3 = n  (where n = [0-1023])
>> + * The maximum number of BHRB entries supported with PPC_MFBHRBE
>> instruction
>> + * is 1024. We have limited number of table entries here as POWER8
>> implements
>> + * 32 BHRB entries.
>> + */
>> +
>> +/* .global read_bhrb */
>> +_GLOBAL(read_bhrb)
>> +    cmpldi    r3,1023
> 
> This should be 31, since that is the last entry in the table below.

Hey Segher,

Would fix this in the next version. Thanks for pointing it out.

Regards
Anshuman

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