X86_FEATURE_REP_GOOD is a linux defined feature flag to track whether
fast string operations should be used for copy_page(). It is also used
as a backup alternative for clear_page() if enhanced fast string
operations (ERMS) are not available.
Currently, the flag is only set for Family 6 processors. Extend the
check to include upcoming processors in Family 18 and 19.
It is uncertain whether X86_FEATURE_REP_GOOD should be set for Family 15
(Pentium 4) as well. Commit 185f3b9da24c ("x86: make intel.c have 64-bit
support code") that originally set the flag also set the
x86_cache_alignment preference for Family 15 processors in the same
commit. The omission of the Family 15 may have been intentional.
Also, move the check before a related check in early_init_intel() to
avoid resetting the flag.
Signed-off-by: Sohil Mehta <sohil.mehta@xxxxxxxxx>
---
v2: Separate out the REP_GOOD (copy page) specific change into a
separate commit.
