powerpc/perf: Add kconfig option for hypervisor provided counters

The commit adds a Kconfig option which allows the hv_gpci and hv_24x7
PMUs, added in the preceeding commits, to be built.

Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 12 insertions, 0 deletions

diff --git a/arch/powerpc/platforms/pseries/Kconfig b/arch/powerpc/platforms/pseries/Kconfig
index 80b1d57c306a..2cb8b776c84a 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