x86: When cleaning MTRRs, do not fold WP into UC

Browse source

The current MTRR code treats WP as a form of UC.  This really isn't
desirable behaviour, except possibly in the case of severe MTRR
shortage.  Disable this, to allow legitimate uses of WP to remain
unmolested.

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>

...

This commit is contained in:

Yinghai Lu 2009-11-16 23:04:56 -08:00 • committed by H. Peter Anvin

parent 5bd085b5fb

commit 508d85c2c6

1 changed files with 0 additions and 2 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

2

arch/x86/kernel/cpu/mtrr/cleanup.c

View file