x86, AMD: Enable WC+ memory type on family 10 processors

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In some cases BIOS may not enable WC+ memory type on family 10
processors, instead converting what would be WC+ memory to CD type.
On guests using nested pages this could result in performance
degradation. This patch enables WC+.

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@amd.com>
Link: http://lkml.kernel.org/r/1359495169-23278-1-git-send-email-ostr@amd64.org
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

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Boris Ostrovsky 2013-01-29 16:32:49 -05:00 • committed by H. Peter Anvin

parent 6bf08a8dcd

commit f0322bd341

2 changed files with 17 additions and 5 deletions

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arch/x86/include/uapi/asm/msr-index.h

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21

arch/x86/kernel/cpu/amd.c

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