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| author |   Yinghai Lu <yhlu.kernel@gmail.com> | 2008-07-10 20:38:26 -0700 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2008-07-11 10:24:04 +0200 |
| commit | f361a450bf1ad14e2b003217dbf3958638631265 (patch) | |
| tree | 10c1e4dcc0047f6c37387cada6a0bceba088d2d2 /arch/x86/pci/i386.c | |
| parent | x86: reserve SLIT (diff) | |
| download | linux-dev-f361a450bf1ad14e2b003217dbf3958638631265.tar.xz linux-dev-f361a450bf1ad14e2b003217dbf3958638631265.zip | |
x86: introduce max_low_pfn_mapped for 64-bit
when more than 4g memory is installed, don't map the big hole below 4g.
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/pci/i386.c')
| -rw-r--r-- | arch/x86/pci/i386.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c index 6ccd7a108cd4..5281e343dd9f 100644 --- a/arch/x86/pci/i386.c +++ b/arch/x86/pci/i386.c @@ -334,7 +334,9 @@ int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma, flags = new_flags; } - if (vma->vm_pgoff <= max_pfn_mapped && + if (((vma->vm_pgoff <= max_low_pfn_mapped) || + (vma->vm_pgoff >= (1UL<<(32 - PAGE_SHIFT)) && + vma->vm_pgoff <= max_pfn_mapped)) && ioremap_change_attr((unsigned long)__va(addr), len, flags)) { free_memtype(addr, addr + len); return -EINVAL; |