[Xen-changelog] [xen master] xen/arm: Document the behavior of XENMAPSPACE_dev_mmio

[patchbot@xxxxxxx]

commit 8b3d6858ecbe5f958f45ac5d8e5da6fa5a18266d
Author:     Julien Grall <julien.grall@xxxxxxx>
AuthorDate: Fri May 27 17:06:21 2016 +0100
Commit:     Stefano Stabellini <sstabellini@xxxxxxxxxx>
CommitDate: Mon May 30 13:03:00 2016 +0100

    xen/arm: Document the behavior of XENMAPSPACE_dev_mmio
    
    Currently, XENMAPSPACE_dev_mmio maps MMIO regions using one of the most
    restrictive memory attribute (Device-nGnRE).
    
    Signed-off-by: Julien Grall <julien.grall@xxxxxxx>
    Acked-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 xen/include/public/memory.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/xen/include/public/memory.h b/xen/include/public/memory.h
index 5f7e0d2..29ec571 100644
--- a/xen/include/public/memory.h
+++ b/xen/include/public/memory.h
@@ -220,7 +220,11 @@ DEFINE_XEN_GUEST_HANDLE(xen_machphys_mapping_t);
 #define XENMAPSPACE_gmfn_range   3 /* GMFN range, XENMEM_add_to_physmap only. 
*/
 #define XENMAPSPACE_gmfn_foreign 4 /* GMFN from another dom,
                                     * XENMEM_add_to_physmap_batch only. */
-#define XENMAPSPACE_dev_mmio     5 /* device mmio region */
+#define XENMAPSPACE_dev_mmio     5 /* device mmio region
+                                      ARM only; the region is mapped in
+                                      Stage-2 using the memory attribute
+                                      "Device-nGnRE" (previously named
+                                      "Device" on ARMv7) */
 /* ` } */
 
 /*
--
generated by git-patchbot for /home/xen/git/xen.git#master

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