[PATCH v5] powerpc/pseries/Kconfig: Enable CONFIG_VPA_PMU to be used with KVM

[PATCH v5] powerpc/pseries/Kconfig: Enable CONFIG_VPA_PMU to be used with KVM

[Gautam Menghani]

Currently, CONFIG_VPA_PMU is not enabled by default, and consequently
cannot be used for KVM guests at all, unless explicitly enabled on
host kernel.

Mark CONFIG_VPA_PMU as "default m" to ensure it is available when KVM is
being used.

Cc: stable@vger.kernel.org # v6.13+
Suggested-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Amit Machhiwal <amachhiw@linux.ibm.com>
Reviewed-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
Signed-off-by: Gautam Menghani <gautam@linux.ibm.com>
---
v4 -> v5:
1. Drop the fixes tag (Ritesh)

v3 -> v4:
1. Reword the patch description (Harsh)

v2 -> v3:
1. Make CONFIG_VPA_PMU as default m so that it can separately disabled
(Sean)

v1 -> v2:
1. Rebased on latest master

 arch/powerpc/platforms/pseries/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/powerpc/platforms/pseries/Kconfig b/arch/powerpc/platforms/pseries/Kconfig
index f7052b131a4c..74910ce3a541 100644
--- a/arch/powerpc/platforms/pseries/Kconfig
+++ b/arch/powerpc/platforms/pseries/Kconfig
@@ -154,6 +154,7 @@ config HV_PERF_CTRS
 config VPA_PMU
 	tristate "VPA PMU events"
 	depends on KVM_BOOK3S_64_HV && HV_PERF_CTRS
+	default m
 	help
 	  Enable access to the VPA PMU counters via perf. This enables
 	  code that support measurement for KVM on PowerVM(KoP) feature.
-- 
2.54.0

Re: [PATCH v5] powerpc/pseries/Kconfig: Enable CONFIG_VPA_PMU to be used with KVM

[Ritesh Harjani]

Gautam Menghani <gautam@linux.ibm.com> writes:

> Currently, CONFIG_VPA_PMU is not enabled by default, and consequently
> cannot be used for KVM guests at all, unless explicitly enabled on
> host kernel.
>
> Mark CONFIG_VPA_PMU as "default m" to ensure it is available when KVM is
> being used.
>
> Cc: stable@vger.kernel.org # v6.13+
> Suggested-by: Sean Christopherson <seanjc@google.com>
> Reviewed-by: Amit Machhiwal <amachhiw@linux.ibm.com>
> Reviewed-by: Harsh Prateek Bora <harshpb@linux.ibm.com>
> Signed-off-by: Gautam Menghani <gautam@linux.ibm.com>
> ---
> v4 -> v5:
> 1. Drop the fixes tag (Ritesh)

Thanks. LGTM, feel free to add:
Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>