From cf94b62f7005805be0a3ba02c624cb8cd3595bac Mon Sep 17 00:00:00 2001
From: "Siddha, Suresh B" <suresh.b.siddha@intel.com>
Date: Sat, 16 Apr 2005 15:25:11 -0700
Subject: [PATCH] x86_64-always-use-cpuid-80000008-to-figure-out-mtrr fix
We need to use the size_and_mask in set_mtrr_var_ranges(which is called
while programming MTRR's for AP's
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
arch/i386/kernel/cpu/mtrr/generic.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
(limited to 'arch')
diff --git a/arch/i386/kernel/cpu/mtrr/generic.c b/arch/i386/kernel/cpu/mtrr/generic.c
index a4cce454d09b..9f7a7ea6388d 100644
--- a/arch/i386/kernel/cpu/mtrr/generic.c
+++ b/arch/i386/kernel/cpu/mtrr/generic.c
@@ -193,7 +193,8 @@ static int set_mtrr_var_ranges(unsigned int index, struct mtrr_var_range *vr)
rdmsr(MTRRphysBase_MSR(index), lo, hi);
if ((vr->base_lo & 0xfffff0ffUL) != (lo & 0xfffff0ffUL)
- || (vr->base_hi & 0xfUL) != (hi & 0xfUL)) {
+ || (vr->base_hi & (size_and_mask >> (32 - PAGE_SHIFT))) !=
+ (hi & (size_and_mask >> (32 - PAGE_SHIFT)))) {
mtrr_wrmsr(MTRRphysBase_MSR(index), vr->base_lo, vr->base_hi);
changed = TRUE;
}
@@ -201,7 +202,8 @@ static int set_mtrr_var_ranges(unsigned int index, struct mtrr_var_range *vr)
rdmsr(MTRRphysMask_MSR(index), lo, hi);
if ((vr->mask_lo & 0xfffff800UL) != (lo & 0xfffff800UL)
- || (vr->mask_hi & 0xfUL) != (hi & 0xfUL)) {
+ || (vr->mask_hi & (size_and_mask >> (32 - PAGE_SHIFT))) !=
+ (hi & (size_and_mask >> (32 - PAGE_SHIFT)))) {
mtrr_wrmsr(MTRRphysMask_MSR(index), vr->mask_lo, vr->mask_hi);
changed = TRUE;
}
--
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