diff options
author | Sean Christopherson <seanjc@google.com> | 2021-11-11 05:07:28 +0300 |
---|---|---|
committer | Peter Zijlstra <peterz@infradead.org> | 2021-11-17 16:49:08 +0300 |
commit | 1c3430516b0732d923de9fd3bfb3e2e537eeb235 (patch) | |
tree | 5c0f082876f3d6915b25af636d43bd2df7e00f4c /kernel/events | |
parent | b9f5621c9547dd787900f005a9e1c3d5712de512 (diff) | |
download | linux-1c3430516b0732d923de9fd3bfb3e2e537eeb235.tar.xz |
perf: Add wrappers for invoking guest callbacks
Add helpers for the guest callbacks to prepare for burying the callbacks
behind a Kconfig (it's a lot easier to provide a few stubs than to #ifdef
piles of code), and also to prepare for converting the callbacks to
static_call(). perf_instruction_pointer() in particular will have subtle
semantics with static_call(), as the "no callbacks" case will return 0 if
the callbacks are unregistered between querying guest state and getting
the IP. Implement the change now to avoid a functional change when adding
static_call() support, and because the new helper needs to return
_something_ in this case.
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/20211111020738.2512932-8-seanjc@google.com
Diffstat (limited to 'kernel/events')
0 files changed, 0 insertions, 0 deletions