diff options
| author | Sean Christopherson <seanjc@google.com> | 2021-11-11 02:07:29 +0000 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2021-11-17 14:49:08 +0100 |
| commit | 2aef6f306b39bbe74e2287d6e2ee07c4867d87d0 (patch) | |
| tree | 53b56630ba56b3f246289fdcd12096f10b5bf921 /init | |
| parent | 1c3430516b0732d923de9fd3bfb3e2e537eeb235 (diff) | |
perf: Force architectures to opt-in to guest callbacks
Introduce GUEST_PERF_EVENTS and require architectures to select it to
allow registering and using guest callbacks in perf. This will hopefully
make it more difficult for new architectures to add useless "support" for
guest callbacks, e.g. via copy+paste.
Stubbing out the helpers has the happy bonus of avoiding a load of
perf_guest_cbs when GUEST_PERF_EVENTS=n on arm64/x86.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Link: https://lore.kernel.org/r/20211111020738.2512932-9-seanjc@google.com
Diffstat (limited to 'init')
| -rw-r--r-- | init/Kconfig | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/init/Kconfig b/init/Kconfig index 036b750e8d8a..72d40b3b5805 100644 --- a/init/Kconfig +++ b/init/Kconfig @@ -1804,6 +1804,10 @@ config HAVE_PERF_EVENTS help See tools/perf/design.txt for details. +config GUEST_PERF_EVENTS + bool + depends on HAVE_PERF_EVENTS + config PERF_USE_VMALLOC bool help |