+/*
+ * This file is part of the Palacios Virtual Machine Monitor developed
+ * by the V3VEE Project with funding from the United States National
+ * Science Foundation and the Department of Energy.
+ *
+ * The V3VEE Project is a joint project between Northwestern University
+ * and the University of New Mexico. You can find out more at
+ * http://www.v3vee.org
+ *
+ * Copyright (c) 2008, Jack Lange <jarusl@cs.northwestern.edu>
+ * Copyright (c) 2008, The V3VEE Project <http://www.v3vee.org>
+ * All rights reserved.
+ *
+ * Author: Jack Lange <jarusl@cs.northwestern.edu>
+ *
+ * This is free software. You are permitted to use,
+ * redistribute, and modify it as specified in the file "V3VEE_LICENSE".
+ */
+
+
#ifndef __VMM_MEM_H
#define __VMM_MEM_H
-#include <palacios/vmm_types.h>
+#ifdef __V3VEE__
-typedef ulong_t addr_t;
+#include <palacios/vmm_types.h>
-struct guest_info;
+#include <palacios/vmm_paging.h>
+#include <palacios/vmm_rbtree.h>
-/*
+struct guest_info;
- Guest Shadow Host
- Virtual Physical Virtual Physical Virtual Physical
- OK OK
- OK NOK
- NOK OK
- NOK NOK
-*/
-
-// These are the types of physical memory address regions
-// from the perspective of the guest
-typedef enum guest_region_type {
- GUEST_REGION_NOTHING,
- GUEST_REGION_PHYSICAL_MEMORY,
- GUEST_REGION_MEMORY_MAPPED_DEVICE} guest_region_type_t;
// These are the types of physical memory address regions
// from the perspective of the HOST
-typedef enum host_region_type {
- HOST_REGION_INVALID, // This region is INVALID (this is a return type, to denote errors)
- HOST_REGION_NOTHING, // This region is mapped as not present (always generate page faults)
- HOST_REGION_PHYSICAL_MEMORY, // Region is a section of host memory
- HOST_REGION_MEMORY_MAPPED_DEVICE, // Region is allocated for DMA
- HOST_REGION_UNALLOCATED, // Region is mapped on demand
- HOST_REGION_REMOTE, // Region is located on a remote machine
- HOST_REGION_SWAPPED, // Region is swapped
-} host_region_type_t;
+typedef enum shdw_region_type {
+ SHDW_REGION_WRITE_HOOK, // This region is mapped as read-only (page faults on write)
+ SHDW_REGION_FULL_HOOK, // This region is mapped as not present (always generate page faults)
+ SHDW_REGION_ALLOCATED, // Region is a section of host memory
+} v3_shdw_region_type_t;
+
-typedef struct shadow_region {
- guest_region_type_t guest_type;
- addr_t guest_start;
- addr_t guest_end;
+struct v3_shadow_region {
+ addr_t guest_start;
+ addr_t guest_end;
- host_region_type_t host_type;
- union host_addr_t {
- struct physical_addr {
- addr_t host_start;
- } phys_addr;
- // Other addresses, like on disk, etc, would go here
- } host_addr;
- struct shadow_region *next, *prev;
-} shadow_region_t;
+ v3_shdw_region_type_t host_type;
+
+ addr_t host_addr; // This either points to a host address mapping
+ // Called when data is read from a memory page
+ int (*read_hook)(addr_t guest_addr, void * dst, uint_t length, void * priv_data);
+ // Called when data is written to a memory page
+ int (*write_hook)(addr_t guest_addr, void * src, uint_t length, void * priv_data);
-struct shadow_map {
- uint_t num_regions;
+ void * priv_data;
- shadow_region_t * head;
+ struct rb_node tree_node;
};
-void init_shadow_region(shadow_region_t * entry,
- addr_t guest_addr_start,
- addr_t guest_addr_end,
- guest_region_type_t guest_region_type,
- host_region_type_t host_region_type);
+typedef struct v3_shdw_map {
+ struct v3_shadow_region base_region;
+
+
+ addr_t hook_hva;
+
+ struct rb_root shdw_regions;
+} v3_shdw_map_t;
+
+
+
+
+int v3_init_shadow_map(struct guest_info * info);
+void v3_delete_shadow_map(struct guest_info * info);
+
+
+int v3_add_shadow_mem(struct guest_info * guest_info,
+ addr_t guest_addr_start,
+ addr_t guest_addr_end,
+ addr_t host_addr);
+
+int v3_hook_full_mem(struct guest_info * info, addr_t guest_addr_start, addr_t guest_addr_end,
+ int (*read)(addr_t guest_addr, void * dst, uint_t length, void * priv_data),
+ int (*write)(addr_t guest_addr, void * src, uint_t length, void * priv_data),
+ void * priv_data);
+
+int v3_hook_write_mem(struct guest_info * info, addr_t guest_addr_start, addr_t guest_addr_end,
+ addr_t host_addr,
+ int (*write)(addr_t guest_addr, void * src, uint_t length, void * priv_data),
+ void * priv_data);
+
+
+
+int v3_unhook_mem(struct guest_info * info, addr_t guest_addr_start);
+
+
+void v3_delete_shadow_region(struct guest_info * info, struct v3_shadow_region * reg);
+
+
+
+
+struct v3_shadow_region * v3_get_shadow_region(struct guest_info * info, addr_t guest_addr);
+addr_t v3_get_shadow_addr(struct v3_shadow_region * reg, addr_t guest_addr);
+
+
-/*
-void init_shadow_region_physical(shadow_region_t * entry,
- addr_t guest_addr_start,
- addr_t guest_addr_end,
- guest_region_type_t guest_region_type,
- addr_t host_addr_start,
- host_region_type_t host_region_type);
-*/
-int add_shadow_region_passthrough(struct guest_info * guest_info,
- addr_t guest_addr_start,
- addr_t guest_addr_end,
- addr_t host_addr_start);
-void init_shadow_map(struct shadow_map * map);
-void free_shadow_map(struct shadow_map * map);
+void v3_print_mem_map(struct guest_info * info);
-shadow_region_t * get_shadow_region_by_addr(struct shadow_map * map, addr_t guest_addr);
-shadow_region_t * get_shadow_region_by_index(struct shadow_map * map, uint_t index);
-host_region_type_t lookup_shadow_map_addr(struct shadow_map * map, addr_t guest_addr, addr_t * host_addr);
-// Semantics:
-// Adding a region that overlaps with an existing region results is undefined
-// and will probably fail
-int add_shadow_region(struct shadow_map * map, shadow_region_t * entry);
+const uchar_t * v3_shdw_region_type_to_str(v3_shdw_region_type_t type);
-// Semantics:
-// Deletions result in splitting
-int delete_shadow_region(struct shadow_map * map,
- addr_t guest_start,
- addr_t guest_end);
-void print_shadow_map(struct shadow_map * map);
+int handle_special_page_fault(struct guest_info * info, addr_t fault_addr, addr_t gp_addr, pf_error_t access_info);
+int v3_handle_mem_wr_hook(struct guest_info * info, addr_t guest_va, addr_t guest_pa,
+ struct v3_shadow_region * reg, pf_error_t access_info);
+int v3_handle_mem_full_hook(struct guest_info * info, addr_t guest_va, addr_t guest_pa,
+ struct v3_shadow_region * reg, pf_error_t access_info);
+#endif // ! __V3VEE__
#endif
