tree d5ff65b3661561716f52d189f6945d1e2dac1e5c
parent 759235653de427e4e7b62d8e6fb1ef9cb68bac7d
author Igor Druzhinin <igor.druzhinin@citrix.com> 1499726402 +0100
committer Stefano Stabellini <sstabellini@kernel.org> 1500412569 -0700

xen/mapcache: introduce xen_replace_cache_entry()

This new call is trying to update a requested map cache entry
according to the changes in the physmap. The call is searching
for the entry, unmaps it and maps again at the same place using
a new guest address. If the mapping is dummy this call will
make it real.

This function makes use of a new xenforeignmemory_map2() call
with an extended interface that was recently introduced in
libxenforeignmemory [1].

[1] https://www.mail-archive.com/xen-devel@lists.xen.org/msg113007.html

Signed-off-by: Igor Druzhinin <igor.druzhinin@citrix.com>
Reviewed-by: Paul Durrant <paul.durrant@citrix.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>