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(parent: 3166851) | patch
x86/xen: do not use _PAGE_IOMAP PTE flag for I/O mappings
authorDavid Vrabel <david.vrabel@citrix.com>
Wed, 8 Jan 2014 14:01:01 +0000 (14:01 +0000)
committerStefano Stabellini <stefano.stabellini@eu.citrix.com>
Tue, 23 Sep 2014 13:36:20 +0000 (13:36 +0000)
commit7f2f88224517cdaad68b772b2a2095b87dc72886
tree9bcedd214955d7f9712e5ae4498b5983857a5dcftree | snapshot (tar.gz zip)
parent31668511424110ad470315c6a63dec9a10f1a7bacommit | diff
x86/xen: do not use _PAGE_IOMAP PTE flag for I/O mappings

Since mfn_to_pfn() returns the correct PFN for identity mappings (as
used for MMIO regions), the use of _PAGE_IOMAP is not required in
pte_mfn_to_pfn().

Do not set the _PAGE_IOMAP flag in pte_pfn_to_mfn() and do not use it
in pte_mfn_to_pfn().

This will allow _PAGE_IOMAP to be removed, making it available for
future use.

Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
arch/x86/xen/mmu.c diff | blob | blame | history