linux-kernel - Re: [PATCH v2 10/11] powerpc/perf: add kconfig option for hypervisor provided counters

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Date:	Tue, 25 Feb 2014 13:31:13 -0800
From:	Cody P Schafer <cody@...ux.vnet.ibm.com>
To:	Michael Ellerman <mpe@...erman.id.au>,
	Linux PPC <linuxppc-dev@...ts.ozlabs.org>,
	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>,
	Anshuman Khandual <khandual@...ux.vnet.ibm.com>,
	Anton Blanchard <anton@...ba.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Kumar Gala <galak@...nel.crashing.org>,
	Lijun Pan <Lijun.Pan@...escale.com>,
	Li Yang <leoli@...escale.com>, Paul Bolle <pebolle@...cali.nl>,
	Priyanka Jain <Priyanka.Jain@...escale.com>,
	Scott Wood <scottwood@...escale.com>,
	Tang Yuantian <yuantian.tang@...escale.com>
CC:	LKML <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Paul Mackerras <paulus@...ba.org>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Ingo Molnar <mingo@...hat.com>
Subject: Re: [PATCH v2 10/11] powerpc/perf: add kconfig option for hypervisor
 provided counters

On 02/24/2014 07:33 PM, Michael Ellerman wrote:
> On Fri, 2014-14-02 at 22:02:14 UTC, Cody P Schafer wrote:
>> Signed-off-by: Cody P Schafer <cody@...ux.vnet.ibm.com>
>> ---
>>   arch/powerpc/perf/Makefile             | 2 ++
>>   arch/powerpc/platforms/Kconfig.cputype | 6 ++++++
>>   2 files changed, 8 insertions(+)
>>
>> diff --git a/arch/powerpc/perf/Makefile b/arch/powerpc/perf/Makefile
>> index 60d71ee..f9c083a 100644
>> --- a/arch/powerpc/perf/Makefile
>> +++ b/arch/powerpc/perf/Makefile
>> @@ -11,5 +11,7 @@ obj32-$(CONFIG_PPC_PERF_CTRS)	+= mpc7450-pmu.o
>>   obj-$(CONFIG_FSL_EMB_PERF_EVENT) += core-fsl-emb.o
>>   obj-$(CONFIG_FSL_EMB_PERF_EVENT_E500) += e500-pmu.o e6500-pmu.o
>>
>> +obj-$(CONFIG_HV_PERF_CTRS) += hv-24x7.o hv-gpci.o hv-common.o
>> +
>>   obj-$(CONFIG_PPC64)		+= $(obj64-y)
>>   obj-$(CONFIG_PPC32)		+= $(obj32-y)
>> diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
>> index 434fda3..dcc67cd 100644
>> --- a/arch/powerpc/platforms/Kconfig.cputype
>> +++ b/arch/powerpc/platforms/Kconfig.cputype
>> @@ -364,6 +364,12 @@ config PPC_PERF_CTRS
>>          help
>>            This enables the powerpc-specific perf_event back-end.
>>
>> +config HV_PERF_CTRS
>> +       def_bool y
>
> This was bool, why did you change it?

No, it wasn't. v1 also had def_bool. https://lkml.org/lkml/2014/1/16/518
Maybe you're confusing v2.1 and v2 of this patch?

>
>> +       depends on PERF_EVENTS && PPC_HAVE_PMU_SUPPORT
>
> Should be:
>
> 	depends on PERF_EVENTS && PPC_PSERIES
>
>> +       help
>> +         Enable access to perf counters provided by the hypervisor
>> +

Yep, the v2.1 patch (which I bungled and labeled as 9/11) already 
changes both of these.
It'll end up rolled into v3.

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