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x86: Enable fast strings on Intel if BIOS hasn't already
Intel SDM volume 3A, 8.4.2 says: Software can disable fast-string operation by clearing the fast-string-enable bit (bit 0) of IA32_MISC_ENABLE MSR. However, Intel recomments that system software always enable fast-string operation. The Intel DQ67SW board (with latest BIOS) disables fast string operations if TXT is enabled. A Lenovo X220 disables it regardless of TXT setting. I doubt I'm the only person with a dumb BIOS like this. Signed-off-by: Andy Lutomirski <email@example.com>
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