linux/arch/arm/include
Julien Grall 5192b35de4 arm/xen: implement correctly pfn_to_mfn
After the commit introducing convertion between DMA and guest addresses,
all the callers of pfn_to_mfn are expecting to get a GFN (Guest Frame
Number). On ARM, all the guests are auto-translated so the GFN is equal
to the Linux PFN (Pseudo-physical Frame Number).

The current implementation may return an MFN if the caller is passing a
PFN associated to a mapped foreign grant. In pratice, I haven't seen
the problem on running guest but we should fix it for the sake of
correctness.

Correct the implementation by always returning the pfn passed in parameter.

A follow-up patch will take care to rename pfn_to_mfn to a suitable
name.

Signed-off-by: Julien Grall <julien.grall@citrix.com>
Reviewed-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
2015-09-08 17:10:52 +01:00
..
asm arm/xen: implement correctly pfn_to_mfn 2015-09-08 17:10:52 +01:00
debug The i.MX SoC updates for 4.2: 2015-06-10 16:58:05 -07:00
uapi/asm This mostly includes the PPC changes for 4.1, which this time cover 2015-04-26 13:06:22 -07:00