Re: [RFC PATCH v2 2/3] perf/x86/intel/pt: Introduce and export pt_get_curr_event()

[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.