On Mon, May 05, 2025 at 03:40:20PM +0000, Kaplan, David wrote: > Almost. My thought was that kvm_run could do something like: > > If (!this_cpu_read(bp_spec_reduce_is_set)) { > wrmsrl to set BP_SEC_REDUCE > this_cpu_write(bp_spec_reduce_is_set, 1) > } That's what I meant too. :-) -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette