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authorIgor Druzhinin <igor.druzhinin@citrix.com>2017-07-10 23:40:02 +0100
committerStefano Stabellini <sstabellini@kernel.org>2017-07-18 14:16:09 -0700
commit5ba3d7564593c55292056ef5af84d50b55ebcf0e (patch)
treed5ff65b3661561716f52d189f6945d1e2dac1e5c /include/sysemu/xen-mapcache.h
parent759235653de427e4e7b62d8e6fb1ef9cb68bac7d (diff)
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>
Diffstat (limited to 'include/sysemu/xen-mapcache.h')
-rw-r--r--include/sysemu/xen-mapcache.h11
1 files changed, 10 insertions, 1 deletions
diff --git a/include/sysemu/xen-mapcache.h b/include/sysemu/xen-mapcache.h
index 01daaad00c..bd4d49e0a4 100644
--- a/include/sysemu/xen-mapcache.h
+++ b/include/sysemu/xen-mapcache.h
@@ -21,7 +21,9 @@ uint8_t *xen_map_cache(hwaddr phys_addr, hwaddr size,
ram_addr_t xen_ram_addr_from_mapcache(void *ptr);
void xen_invalidate_map_cache_entry(uint8_t *buffer);
void xen_invalidate_map_cache(void);
-
+uint8_t *xen_replace_cache_entry(hwaddr old_phys_addr,
+ hwaddr new_phys_addr,
+ hwaddr size);
#else
static inline void xen_map_cache_init(phys_offset_to_gaddr_t f,
@@ -50,6 +52,13 @@ static inline void xen_invalidate_map_cache(void)
{
}
+static inline uint8_t *xen_replace_cache_entry(hwaddr old_phys_addr,
+ hwaddr new_phys_addr,
+ hwaddr size)
+{
+ abort();
+}
+
#endif
#endif /* XEN_MAPCACHE_H */