linux-kernel - [PATCH v2.1 9/11] powerpc/perf: add kconfig option for hypervisor provided counters

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Message-Id: <1392941697-21799-1-git-send-email-cody@linux.vnet.ibm.com>
Date:	Thu, 20 Feb 2014 16:14:51 -0800
From:	Cody P Schafer <cody@...ux.vnet.ibm.com>
To:	Linux PPC <linuxppc-dev@...ts.ozlabs.org>,
	Anshuman Khandual <khandual@...ux.vnet.ibm.com>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Cody P Schafer <cody@...ux.vnet.ibm.com>,
	Deepthi Dharwar <deepthi@...ux.vnet.ibm.com>,
	Gavin Shan <shangw@...ux.vnet.ibm.com>,
	Lijun Pan <Lijun.Pan@...escale.com>,
	Li Zhong <zhong@...ux.vnet.ibm.com>,
	Michael Ellerman <michael@...erman.id.au>,
	Paul Bolle <pebolle@...cali.nl>,
	Priyanka Jain <Priyanka.Jain@...escale.com>,
	"Srivatsa S. Bhat" <srivatsa.bhat@...ux.vnet.ibm.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>, scottwood@...escale.com
Subject: [PATCH v2.1 9/11] powerpc/perf: add kconfig option for hypervisor provided counters

Signed-off-by: Cody P Schafer <cody@...ux.vnet.ibm.com>
---
 arch/powerpc/perf/Makefile             |  2 ++
 arch/powerpc/platforms/pseries/Kconfig | 12 ++++++++++++
 2 files changed, 14 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/pseries/Kconfig b/arch/powerpc/platforms/pseries/Kconfig
index 80b1d57..2cb8b77 100644
--- a/arch/powerpc/platforms/pseries/Kconfig
+++ b/arch/powerpc/platforms/pseries/Kconfig
@@ -111,6 +111,18 @@ config CMM
 	  will be reused for other LPARs. The interface allows firmware to
 	  balance memory across many LPARs.
 
+config HV_PERF_CTRS
+       bool "Hypervisor supplied PMU events (24x7 & GPCI)"
+       default y
+       depends on PERF_EVENTS && PPC_PSERIES
+       help
+	  Enable access to hypervisor supplied counters in perf. Currently,
+	  this enables code that uses the hcall GetPerfCounterInfo and 24x7
+	  interfaces to retrieve counters. GPCI exists on Power 6 and later
+	  systems. 24x7 is available on Power 8 systems.
+
+          If unsure, select Y.
+
 config DTL
 	bool "Dispatch Trace Log"
 	depends on PPC_SPLPAR && DEBUG_FS
-- 
1.9.0

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