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| author | Jacob Shin <jacob.shin@amd.com> | 2012-11-16 19:38:48 -0800 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2012-11-17 11:59:09 -0800 |
| commit | dda56e134059b840631fdfd034784056b627c2a6 (patch) | |
| tree | f7369202429bc6204b0e5062426982265be0fb46 /arch/x86/kernel/cpu/amd.c | |
| parent | 4eea6aa581abfeb2695ebe9f9d4672597e1bdd4b (diff) | |
| download | op-kernel-dev-dda56e134059b840631fdfd034784056b627c2a6.zip op-kernel-dev-dda56e134059b840631fdfd034784056b627c2a6.tar.gz | |
x86, mm: Fixup code testing if a pfn is direct mapped
Update code that previously assumed pfns [ 0 - max_low_pfn_mapped ) and
[ 4GB - max_pfn_mapped ) were always direct mapped, to now look up
pfn_mapped ranges instead.
-v2: change applying sequence to keep git bisecting working.
so add dummy pfn_range_is_mapped(). - Yinghai Lu
Signed-off-by: Jacob Shin <jacob.shin@amd.com>
Link: http://lkml.kernel.org/r/1353123563-3103-12-git-send-email-yinghai@kernel.org
Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/kernel/cpu/amd.c')
| -rw-r--r-- | arch/x86/kernel/cpu/amd.c | 8 |
1 files changed, 3 insertions, 5 deletions
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c index f7e98a2..9619ba6 100644 --- a/arch/x86/kernel/cpu/amd.c +++ b/arch/x86/kernel/cpu/amd.c @@ -676,12 +676,10 @@ static void __cpuinit init_amd(struct cpuinfo_x86 *c) * benefit in doing so. */ if (!rdmsrl_safe(MSR_K8_TSEG_ADDR, &tseg)) { + unsigned long pfn = tseg >> PAGE_SHIFT; + printk(KERN_DEBUG "tseg: %010llx\n", tseg); - if ((tseg>>PMD_SHIFT) < - (max_low_pfn_mapped>>(PMD_SHIFT-PAGE_SHIFT)) || - ((tseg>>PMD_SHIFT) < - (max_pfn_mapped>>(PMD_SHIFT-PAGE_SHIFT)) && - (tseg>>PMD_SHIFT) >= (1ULL<<(32 - PMD_SHIFT)))) + if (pfn_range_is_mapped(pfn, pfn + 1)) set_memory_4k((unsigned long)__va(tseg), 1); } } |
