X-Git-Url: http://v3vee.org/palacios/gitweb/gitweb.cgi?a=blobdiff_plain;f=linux_usr%2Fv3_guest_mem.h;h=cacddd15818529e1e5b942bfd125c82f621a17af;hb=da0b4bb80de755529f47b9ca57ccb0c2cefae15b;hp=907502c7c0622db43d9f3de8df4afda572941f9e;hpb=ab570b923abf061acf9f495e5f4178e8c2af0fcc;p=palacios.git

diff --git a/linux_usr/v3_guest_mem.h b/linux_usr/v3_guest_mem.h
index 907502c..cacddd1 100644
--- a/linux_usr/v3_guest_mem.h
+++ b/linux_usr/v3_guest_mem.h
@@ -4,8 +4,16 @@
 #include <stdint.h>
 #include "v3_ctrl.h"
 
+
+#include "memtrack.h"
+
+/**************************/
+/* Access to guest memory */
+/**************************/
+
 struct v3_guest_mem_block {
-  void     *gpa;      // guest physical address is
+  void     *gpa;      // guest physical address this region starts at
+  void     *cumgpa;   // cumulative GPA in the VM including this block
   void     *hpa;      // mapped to this host physical address
   void     *uva;      // which is mapped here in this process
   uint64_t numpages;  // this many 4K pages
@@ -27,6 +35,79 @@ struct v3_guest_mem_map * v3_guest_mem_get_map(char *vmdev);
 int v3_map_guest_mem(struct v3_guest_mem_map *map);
 // This function unmaps it - it assumes myaddrs are valid
 int v3_unmap_guest_mem(struct v3_guest_mem_map *map);
+// What is the first GPA of this guest that contains memory ?
+void *v3_gpa_start(struct v3_guest_mem_map *map);
+// What is the last GPA of this guest that contains memory ?
+void *v3_gpa_end(struct v3_guest_mem_map *map);
+// map from a gpa to a uva, optionally giving the number of 
+// subsequent bytes for which the mapping is continguous
+static inline void *v3_gpa_to_uva(struct v3_guest_mem_map *map, void *gpa, uint64_t *num_bytes)
+{
+    uint64_t left, right, middle;
+
+    if (!map->fd) { 
+	// not mapped
+	if (num_bytes) { *num_bytes=0;}
+	return 0;
+    }
+    
+    left = 0; right=map->numblocks-1;
+    
+    while (right>=left) { 
+	middle = (right+left)/2;
+	if (gpa > map->block[middle].cumgpa) { 
+	    left=middle+1;
+	} else if (gpa < map->block[middle].gpa) { 
+	    right=middle-1;
+	} else {
+	    break;
+	}
+    }
+
+    if (right>=left) { 
+	if (num_bytes) { 
+	    *num_bytes = map->block[middle].cumgpa - gpa + 1;
+	}
+	return map->block[middle].uva + (gpa - map->block[middle].gpa);
+    } else {
+	if (num_bytes) { 
+	    *num_bytes=0;
+	} 
+	return 0;
+    }
+}
+
+// efficiently map function over the specified guest memory
+int v3_guest_mem_apply(void (*func)(void *data, uint64_t num_bytes, void *priv),
+		       struct v3_guest_mem_map *map, void *gpa, uint64_t num_bytes, void *priv);
+
+// read data out of guest
+int v3_guest_mem_read(struct v3_guest_mem_map *map, void *gpa, uint64_t num_bytes, char *data);
+
+// write data into  guest
+int v3_guest_mem_write(struct v3_guest_mem_map *map, void *gpa, uint64_t num_bytes, char *data);
+
+// hash the guest's data
+int v3_guest_mem_hash(struct v3_guest_mem_map *map, void *gpa, uint64_t num_bytes, uint64_t *hash);
+
+
+/********************************/
+/* Guest memory access tracking */
+/********************************/
+
+#include "../linux_module/memtrack.h"
+
+int v3_guest_mem_track_start(char *vmdev, 
+			     v3_mem_track_access_t access, 
+			     v3_mem_track_reset_t reset, 
+			     uint64_t period);
+
+int v3_guest_mem_track_stop(char *vmdev);
+
+v3_mem_track_snapshot *v3_guest_mem_track_snapshot(char *vmdev);
+
+void v3_guest_mem_track_free_snapshot(v3_mem_track_snapshot *snap);
+
 
 
 #endif