On 9/21/21 8:05 PM, Sean Christopherson wrote: > From: Like Xu <like.xu@xxxxxxxxxxxxxxx> > > To prepare for using static_calls to optimize perf's guest callbacks, > replace ->is_in_guest and ->is_user_mode with a new multiplexed hook > ->state, tweak ->handle_intel_pt_intr to play nice with being called when > there is no active guest, and drop "guest" from ->is_in_guest. > > Return '0' from ->state and ->handle_intel_pt_intr to indicate "not in > guest" so that DEFINE_STATIC_CALL_RET0 can be used to define the static > calls, i.e. no callback == !guest. > > Suggested-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> > Originally-by: Peter Zijlstra (Intel) <peterz@xxxxxxxxxxxxx> > Signed-off-by: Like Xu <like.xu@xxxxxxxxxxxxxxx> > Signed-off-by: Zhu Lingshan <lingshan.zhu@xxxxxxxxx> > [sean: extracted from static_call patch, fixed get_ip() bug, wrote changelog] > Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx> For Xen bits Reviewed-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
