This answer record provides the Production IP requirements when targeting Spartan-6 devices.
In order for LogiCORE IP Soft Error Mitigation Controller v3.5 to be used as Production IP, application of the patch file supplied in (Xilinx Answer 55277) is mandatory.
The LogiCORE IP Soft Error Mitigation Controller v3.5 product targeting Spartan-6 devices, in conjunction with the v3.5 Rev 1 patch provided in (Xilinx Answer 55277), is completely verified and validated.
This combined solution, Soft Error Mitigation Controller v3.5 Rev 1, is available for use in production Spartan-6 FPGA devices.
6/20/2013: Updated for 2013.2