Blame SOURCES/06-55-0x-ipu-2020.2_disclaimer

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Latest microcode updates for Intel Skylake/Cascade Lake Scalable Platform CPUs
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(family 6, model 85, steppings 4, 6, and 7; CPUID 0x50654/0x50656/0x50657)
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are disabled on some systems as these updates may cause system instability;
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microcode from the previous microcode-20200609 release is used instead.
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Please refer to /usr/share/doc/microcode_ctl/caveats/06-55-0x-ipu-2020.2_readme
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and /usr/share/doc/microcode_ctl/README.caveats for details.