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Remove the IsBranch flag from ENTER and LEAVE in KVM's emulator, as ENTER and LEAVE are stack operations, not branches. Add forced emulation of said instructions to the PMU counters test to prove that KVM diverges from hardware, and to guard against regressions. Opportunistically add a missing "1 MOV" to the selftest comment regarding the number of instructions per loop, which commit7803339fa9("KVM: selftests: Use data load to trigger LLC references/misses in Intel PMU") forgot to add. Fixes:018d70ffcf("KVM: x86: Update vPMCs when retiring branch instructions") Cc: Jim Mattson <jmattson@google.com> Reviewed-by: Jim Mattson <jmattson@google.com> Reviewed-by: Chao Gao <chao.gao@intel.com> Link: https://lore.kernel.org/r/20250919004639.1360453-1-seanjc@google.com Signed-off-by: Sean Christopherson <seanjc@google.com>