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The PCOMMIT instruction was never included in any physical processor. TCG implements it as a no-op instruction, but its utility is debatable to say the least. Drop it from the decoder since it is only available with "-cpu max", which does not guarantee migration compatibility across versions, and deprecate the property just in case someone is using it as "pcommit=off". Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>