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| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2008-07-03 22:10:18 -0700 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-04 11:31:20 +0200 |
| commit | d8355aca23863be659ec5b7e0393cfbfa91ec221 (patch) | |
| tree | cd6b96eef8ac85df2519dd0f64c5f2a458b22b3f | |
| parent | 27df66a406a171308b138bd84938cb735392e15c (diff) | |
| download | linux-d8355aca23863be659ec5b7e0393cfbfa91ec221.tar.gz linux-d8355aca23863be659ec5b7e0393cfbfa91ec221.tar.bz2 linux-d8355aca23863be659ec5b7e0393cfbfa91ec221.zip | |
xen: fix address truncation in pte mfn<->pfn conversion
When converting the page number in a pte/pmd/pud/pgd between
machine and pseudo-physical addresses, the converted result was
being truncated at 32-bits. This caused failures on machines
with more than 4G of physical memory.
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Cc: "Christopher S. Aker" <caker@theshore.net>
Cc: Ian Campbell <Ian.Campbell@eu.citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | arch/x86/xen/mmu.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c index df40bf74ea75..4e527e7893a8 100644 --- a/arch/x86/xen/mmu.c +++ b/arch/x86/xen/mmu.c @@ -185,7 +185,7 @@ static pteval_t pte_mfn_to_pfn(pteval_t val) if (val & _PAGE_PRESENT) { unsigned long mfn = (val & PTE_MASK) >> PAGE_SHIFT; pteval_t flags = val & ~PTE_MASK; - val = (mfn_to_pfn(mfn) << PAGE_SHIFT) | flags; + val = ((pteval_t)mfn_to_pfn(mfn) << PAGE_SHIFT) | flags; } return val; @@ -196,7 +196,7 @@ static pteval_t pte_pfn_to_mfn(pteval_t val) if (val & _PAGE_PRESENT) { unsigned long pfn = (val & PTE_MASK) >> PAGE_SHIFT; pteval_t flags = val & ~PTE_MASK; - val = (pfn_to_mfn(pfn) << PAGE_SHIFT) | flags; + val = ((pteval_t)pfn_to_mfn(pfn) << PAGE_SHIFT) | flags; } return val; |