On Sat, Aug 28, 2021, Peter Zijlstra wrote:

On Fri, Aug 27, 2021 at 05:35:50PM -0700, Sean Christopherson wrote:

quoted

diff --git a/init/Kconfig b/init/Kconfig
index 55f9f7738ebb..9ef51ae53977 100644
--- a/init/Kconfig
+++ b/init/Kconfig

@@ -1776,6 +1776,9 @@ config HAVE_PERF_EVENTS
 	help
 	  See tools/perf/design.txt for details.
 
+config HAVE_GUEST_PERF_EVENTS
+	bool

	depends on HAVE_KVM

?

Ah, nice!  We can go even further to:

	depends on HAVE_PERF_EVENTS && HAVE_KVM

though I'm pretty sure all architectures that select HAVE_KVM also select
HAVE_PERF_EVENTS.

Huh.  arm64 doesn't select HAVE_KVM even though it selects almost literally every
other HAVE_KVM_* config.  arm64 has some other weirdness with CONFIG_KVM, I'll add
a patch or two to fix that stuff and amend this patch as above.

Thanks again!