xen/gntdev: mark userspace PTEs as special on x86 PV guests

[firefly-linux-kernel-4.4.55.git] / include / xen / interface / grant_table.h

diff --git a/include/xen/interface/grant_table.h b/include/xen/interface/grant_table.h
index bcce56439d644559c5a46569ef83d4c5160f12b4..56806bc90c2fbe0227a87b8c3bec2c38256d95a5 100644 (file)
--- a/include/xen/interface/grant_table.h
+++ b/include/xen/interface/grant_table.h
@@ -525,6 +525,13 @@ DEFINE_GUEST_HANDLE_STRUCT(gnttab_cache_flush);
 #define _GNTMAP_contains_pte    (4)
 #define GNTMAP_contains_pte     (1<<_GNTMAP_contains_pte)
 
+/*
+ * Bits to be placed in guest kernel available PTE bits (architecture
+ * dependent; only supported when XENFEAT_gnttab_map_avail_bits is set).
+ */
+#define _GNTMAP_guest_avail0    (16)
+#define GNTMAP_guest_avail_mask ((uint32_t)~0 << _GNTMAP_guest_avail0)
+
 /*
  * Values for error status returns. All errors are -ve.
  */