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xenbus: Support HVM backends

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Add HVM implementations of xenbus_(map,unmap)_ring_v(alloc,free) so
that ring mappings can be done without using GNTMAP_contains_pte which
is not supported on HVM.  This also removes the need to use vmlist_lock
on PV by tracking the allocated xenbus rings.

Signed-off-by: Daniel De Graaf <dgdegra@tycho.nsa.gov>
[v1: Fix compile error when XENBUS_FRONTEND is defined as module]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This commit is contained in:
Daniel De Graaf
2011-12-19 14:55:14 -05:00
committed by Konrad Rzeszutek Wilk
parent cb85f123cd
commit 2c5d37d30f
3 changed files with 160 additions and 22 deletions
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drivers/xen/xenbus/xenbus_probe.h
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@@ -76,4 +76,6 @@ extern void xenbus_otherend_changed(struct xenbus_watch *watch,
extern int xenbus_read_otherend_details(struct xenbus_device *xendev,
char *id_node, char *path_node);
void xenbus_ring_ops_init(void);
#endif