On Tue, Sep 22, 2026 at 01:25:07PM +0900, Masami Hiramatsu (Google) wrote: > From: Masami Hiramatsu (Google) <[email protected]> > > When KVM enters a guest OS, host hardware breakpoints are disabled > before running the guest. However, an NMI can occur while executing > in guest mode or during guest transition, where > arch_install_hw_breakpoint() can be invoked from NMI context.
How? AFAICT perf doesn't do that. arch_install_hw_breakpoint() is called through pmu::add() which is strictly IPI context.
