[PATCH] x86_64: Force correct address space size for MTRR on some 64bit Intel Xeons
authorShaohua Li <shaohua.li@intel.com>
Sat, 5 Nov 2005 16:25:54 +0000 (17:25 +0100)
committerLinus Torvalds <torvalds@g5.osdl.org>
Tue, 15 Nov 2005 03:55:16 +0000 (19:55 -0800)
commitaf9c142de94ecf724a18700273bbba390873e072
tree12ecf9850dc75c19cca7a14233d5ba3efe7dbb9d
parent1d2e6bd86152ab86fb866555281869df340e6c6a
[PATCH] x86_64: Force correct address space size for MTRR on some 64bit Intel Xeons

They report 40bit, but only have 36bits of physical address space.
This caused problems with setting up the correct masks for MTRR.

CPUID workaround for steppings 0F33h(supporting x86) and 0F34h(supporting x86
and EM64T). Detail info can be found at:
http://download.intel.com/design/Xeon/specupdt/30240216.pdf
http://download.intel.com/design/Pentium4/specupdt/30235221.pdf

Signed-off-by: Shaohua Li<shaohua.li@intel.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
arch/i386/kernel/cpu/mtrr/main.c
arch/x86_64/kernel/setup.c