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x86: PAT Update validate_pat_support for intel CPUs
authorvenkatesh.pallipadi@intel.com <venkatesh.pallipadi@intel.com>
Wed, 20 Aug 2008 23:45:53 +0000 (16:45 -0700)
committerIngo Molnar <mingo@elte.hu>
Thu, 21 Aug 2008 11:27:34 +0000 (13:27 +0200)
commit8323444b5dba3fe55e56a95d20d8f55c1d6745af
treee2d657ff43c768d3b9f47642fa522cba1c3ffcd8tree | snapshot (tar.gz zip)
parent28df82ebab79c6a2b4295dd94fd8de88196a49dfcommit | diff
x86: PAT Update validate_pat_support for intel CPUs

Pentium III and Core Solo/Duo CPUs have an erratum
" Page with PAT set to WC while associated MTRR is UC may consolidate to UC "
which can result in WC setting in PAT to be ineffective. We will disable
PAT on such CPUs, so that we can continue to use MTRR WC setting.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
arch/x86/kernel/cpu/addon_cpuid_features.c diff | blob | blame | history