xen mapcache: check if memory region has moved.

This patch changes the xen_map_cache behavior. Before trying to map a guest
addr, mapcache will look into the list of range of address that have been moved
(physmap/set_memory). There is currently one memory space like this, the vram,
"moved" from were it's allocated to were the guest will look into.

This help to have a succefull migration.

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>

1 files changed, 7 insertions, 2 deletions

diff --git a/xen-mapcache.h b/xen-mapcache.h
index da874ca23d..70301a57e4 100644
--- a/xen-mapcache.h
+++ b/xen-mapcache.h
@@ -11,9 +11,13 @@
 
 #include <stdlib.h>
 
+typedef target_phys_addr_t (*phys_offset_to_gaddr_t)(target_phys_addr_t start_addr,
+                                                     ram_addr_t size,
+                                                     void *opaque);
 #ifdef CONFIG_XEN
 
-void xen_map_cache_init(void);
+void xen_map_cache_init(phys_offset_to_gaddr_t f,
+                        void *opaque);
 uint8_t *xen_map_cache(target_phys_addr_t phys_addr, target_phys_addr_t size,
                        uint8_t lock);
 ram_addr_t xen_ram_addr_from_mapcache(void *ptr);
@@ -22,7 +26,8 @@ void xen_invalidate_map_cache(void);
 
 #else
 
-static inline void xen_map_cache_init(void)
+static inline void xen_map_cache_init(phys_offset_to_gaddr_t f,
+                                      void *opaque)
 {
 }