On Sat, Feb 05, 2022, Paolo Bonzini wrote: > On 2/4/22 18:59, David Matlack wrote: > > > + reset_shadow_zero_bits_mask(vcpu, context, is_efer_nx(context)); > > > > Out of curiousity, how does KVM mitigate iTLB multi-hit when shadowing > > NPT and the guest has not enabled EFER.NX? > > You got me worried for a second but iTLB multihit is Intel-only, isn't it? AFAIK, yes, big Core only. arch/x86/kernel/cpu/common.c sets NO_ITLB_MULTIHIT for all AMD, Hygon, and Atom CPUs.
