On Thu, Sep 22, 2022 at 01:59:53PM +0000, Wang, Wei W wrote: > On Thursday, September 22, 2022 9:35 PM, Peter Zijlstra > > On Thu, Sep 22, 2022 at 12:58:49PM +0000, Wang, Wei W wrote: > > > > > Add a function to expose the current running PT event to users. One > > > usage is in KVM, it needs to get and disable the running host PT event > > > before VMEnter to the guest and resumes the event after VMexit to host. > > > > You cannot just kill a host event like that. If there is a host event, the guest > > looses out. > > OK. The intention was to pause the event (that only profiles host info) when switching to guest, > and resume when switching back to host. If the even doesn't profile guest context, then yes. If it does profile guest context, you can't.
