tree c33836b693ca066c19dc8986165aee5849fbcdd9
parent e045fb2a988a9a1964059b0d33dbaf18d12f925f
author venkatesh.pallipadi@intel.com <venkatesh.pallipadi@intel.com> 1205884820 -0700
committer Ingo Molnar <mingo@elte.hu> 1209073247 +0200

x86: PAT phys_mem_access_prot_allowed for dev/mem mmap

Introduce phys_mem_access_prot_allowed(), which checks whether the mapping
is possible, without any conflicts and returns success or failure based on that.
phys_mem_access_prot() by itself does not allow failure case. This ability
to return error is needed for PAT where we may have aliasing conflicts.

x86 setup __HAVE_PHYS_MEM_ACCESS_PROT and move x86 specific code out of
/dev/mem into arch specific area.

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>