Silently ignore userspace attempts to change the x2APIC ID via KVM_SET_LAPIC. I've been hunting for this series since January[*], and *finally* stumbled across it while tidying up my (too) many git trees. [*] https://lore.kernel.org/all/ZbPkHvuJv0EdJhVN@xxxxxxxxxx Michal Luczaj (1): KVM: selftests: Add a testcase to verify x2APIC is fully readonly Sean Christopherson (1): KVM: x86: Make x2APIC ID 100% readonly arch/x86/kvm/lapic.c | 18 +++++++++--- .../selftests/kvm/x86_64/xapic_state_test.c | 28 +++++++++++++++++++ 2 files changed, 42 insertions(+), 4 deletions(-) base-commit: 332d2c1d713e232e163386c35a3ba0c1b90df83f -- 2.46.0.rc2.264.g509ed76dc8-goog