On 18/05/26 10:11 am, Gautam Menghani wrote:
Enable CONFIG_VPA_PMU with KVM to enable its usage. Currently, the
vpa-pmu driver cannot be used since it is not enabled in distro configs.
I think the commit log needs a rephrase as irrespective of current state
of distro configs, it makes sense to enable CONFIG_VPA_PMU for KVM
guests on Power by default since this is the only use-case for VPA
counters (i.e. in a KVM guest).
On fedora kernel 6.13.7, the config option is disabled:
$ cat /boot/config-6.19.12-200.fc43.ppc64le | grep VPA_PMU
# CONFIG_VPA_PMU is not set
Fixes: 176cda0619b6c ("powerpc/perf: Add perf interface to expose vpa counters")
Cc: [email protected] # v6.13+
Signed-off-by: Gautam Menghani <[email protected]>
---
v1 -> v2:
1. Rebased on latest master
arch/powerpc/kvm/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/kvm/Kconfig b/arch/powerpc/kvm/Kconfig
index 9a0d1c1aca6c..56e86b46ff13 100644
--- a/arch/powerpc/kvm/Kconfig
+++ b/arch/powerpc/kvm/Kconfig
@@ -82,6 +82,7 @@ config KVM_BOOK3S_64_HV
select KVM_BOOK3S_HV_POSSIBLE
select KVM_BOOK3S_HV_PMU
select CMA
+ select VPA_PMU if HV_PERF_CTRS
Also, since we already select KVM_BOOK3S_HV_PMU, VPA_PMU is a natural
extension, provided we enable only if the required dependecy is enabled.
With an update to the changelog with suggested rationale:
Reviewed-by: Harsh Prateek Bora <[email protected]>
help
Support running unmodified book3s_64 guest kernels in
virtual machines on POWER7 and newer processors that have
