KVM: VMX: Only tell perf to enable PEBS counters for fully enabled PMCs

When passing the guest's requested PEBS_ENABLE (or rather, KVM's version
of PEBS_ENABLE on behalf of the guest), omit counters that are locally
disable and/or don't have a perf event (due to contention), in addition to
omitting counters that are cross-mapped in the host.

In practice, this should be a nop as perf will already have disabled the
associated counter, i.e. cpuc->pebs_enabled should have been cleared, but
paranoia is cheap, and the existing code _looks_ wrong.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Dapeng Mi <dapeng1.mi@linux.intel.com>
Link: https://patch.msgid.link/20260921191418.950933-10-seanjc@google.com

0 files changed, 0 insertions, 0 deletions