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charset="us-ascii" On Thu, Oct 29, 2026, Mahmoud Abumandour wrote: > When L2's LMSW exits to L0 but not to L1, KVM emulates it with > kvm_lmsw(), which ignores vmcs12's CR0 guest/host mask, so L2 can change > CR0 bits that L1 owns. > > v2: > - Patch 2: order the CR0 store before FNOP and check L2's whole CR0. I'll send a v3, I already spent an absurd amount of time figuring all of this out. I really hate x86 sometimes.