x86, pat: Sanity check remap_pfn_range for RAM region

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Add sanity check for remap_pfn_range of RAM regions using
lookup_memtype(). Previously, we did not have anyway to get the type of
RAM memory regions as they were tracked using a single bit in
page_struct (WB, nonWB). Now we can get the actual type from page struct
(WB, WC, UC_MINUS) and make sure the requester gets that type.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

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Venkatesh Pallipadi 2009-07-10 09:57:41 -07:00 • committed by H. Peter Anvin

parent 1087637616

commit d886c73cd4

1 changed files with 21 additions and 3 deletions

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arch/x86/mm/pat.c

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