--- /dev/null
+/*
+ * 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".
+ */
+
+#include <palacios/vmm_mem.h>
+#include <palacios/vmm.h>
+#include <palacios/vmm_util.h>
+#include <palacios/vmm_decoder.h>
+
+
+
+void init_shadow_region(struct shadow_region * 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)
+{
+ entry->guest_type = guest_region_type;
+ entry->guest_start = guest_addr_start;
+ entry->guest_end = guest_addr_end;
+ entry->host_type = host_region_type;
+ entry->host_addr = 0;
+ entry->next=entry->prev = NULL;
+}
+
+int add_shadow_region_passthrough( struct guest_info * guest_info,
+ addr_t guest_addr_start,
+ addr_t guest_addr_end,
+ addr_t host_addr)
+{
+ struct shadow_region * entry = (struct shadow_region *)V3_Malloc(sizeof(struct shadow_region));
+
+ init_shadow_region(entry, guest_addr_start, guest_addr_end,
+ GUEST_REGION_PHYSICAL_MEMORY, HOST_REGION_PHYSICAL_MEMORY);
+ entry->host_addr = host_addr;
+
+ return add_shadow_region(&(guest_info->mem_map), entry);
+}
+
+int hook_guest_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) {
+
+ struct shadow_region * entry = (struct shadow_region *)V3_Malloc(sizeof(struct shadow_region));
+ struct vmm_mem_hook * hook = (struct vmm_mem_hook *)V3_Malloc(sizeof(struct vmm_mem_hook));
+
+ memset(hook, 0, sizeof(struct vmm_mem_hook));
+
+ hook->read = read;
+ hook->write = write;
+ hook->region = entry;
+ hook->priv_data = priv_data;
+
+
+ init_shadow_region(entry, guest_addr_start, guest_addr_end,
+ GUEST_REGION_PHYSICAL_MEMORY, HOST_REGION_HOOK);
+
+ entry->host_addr = (addr_t)hook;
+
+ return add_shadow_region(&(info->mem_map), entry);
+}
+
+
+struct vmm_mem_hook * get_mem_hook(struct guest_info * info, addr_t guest_addr) {
+ struct shadow_region * region = get_shadow_region_by_addr(&(info->mem_map), guest_addr);
+
+ if (region == NULL) {
+ PrintDebug("Could not find shadow region for addr: %p\n", (void *)guest_addr);
+ return NULL;
+ }
+
+ return (struct vmm_mem_hook *)(region->host_addr);
+}
+
+
+/* mem_addr is the guest physical memory address */
+static int mem_hook_dispatch(struct guest_info * info,
+ addr_t fault_gva, addr_t fault_gpa,
+ pf_error_t access_info, struct vmm_mem_hook * hook)
+{
+
+ // emulate and then dispatch
+ // or dispatch and emulate
+
+
+ if (access_info.write == 1) {
+ if (v3_emulate_memory_write(info, fault_gva, hook->write, fault_gpa, hook->priv_data) == -1) {
+ PrintError("Memory write emulation failed\n");
+ return -1;
+ }
+
+ } else {
+ if (v3_emulate_memory_read(info, fault_gva, hook->read, fault_gpa, hook->priv_data) == -1) {
+ PrintError("Memory read emulation failed\n");
+ return -1;
+ }
+ }
+
+ return 0;
+}
+
+
+int handle_special_page_fault(struct guest_info * info,
+ addr_t fault_gva, addr_t fault_gpa,
+ pf_error_t access_info)
+{
+ struct shadow_region * reg = get_shadow_region_by_addr(&(info->mem_map), fault_gpa);
+
+ PrintDebug("Handling Special Page Fault\n");
+
+ switch (reg->host_type) {
+ case HOST_REGION_HOOK:
+ return mem_hook_dispatch(info, fault_gva, fault_gpa, access_info, (struct vmm_mem_hook *)(reg->host_addr));
+ default:
+ return -1;
+ }
+
+ return 0;
+
+}
+
+
+
+void init_shadow_map(struct guest_info * info) {
+ struct shadow_map * map = &(info->mem_map);
+
+ map->num_regions = 0;
+
+ map->head = NULL;
+}
+
+
+void free_shadow_map(struct shadow_map * map) {
+ struct shadow_region * cursor = map->head;
+ struct shadow_region * tmp = NULL;
+
+ while(cursor) {
+ tmp = cursor;
+ cursor = cursor->next;
+ V3_Free(tmp);
+ }
+
+ V3_Free(map);
+}
+
+
+
+
+int add_shadow_region(struct shadow_map * map,
+ struct shadow_region * region)
+{
+ struct shadow_region * cursor = map->head;
+
+ PrintDebug("Adding Shadow Region: (0x%p-0x%p)\n",
+ (void *)region->guest_start, (void *)region->guest_end);
+
+ if ((!cursor) || (cursor->guest_start >= region->guest_end)) {
+ region->prev = NULL;
+ region->next = cursor;
+ map->num_regions++;
+ map->head = region;
+ return 0;
+ }
+
+ while (cursor) {
+ // Check if it overlaps with the current cursor
+ if ((cursor->guest_end > region->guest_start) && (cursor->guest_start < region->guest_start)) {
+ // overlaps not allowed
+ return -1;
+ }
+
+ if (!(cursor->next)) {
+ // add to the end of the list
+ cursor->next = region;
+ region->prev = cursor;
+ region->next = NULL;
+ map->num_regions++;
+ return 0;
+ } else if (cursor->next->guest_start >= region->guest_end) {
+ // add here
+ region->next = cursor->next;
+ region->prev = cursor;
+
+ cursor->next->prev = region;
+ cursor->next = region;
+
+ map->num_regions++;
+
+ return 0;
+ } else if (cursor->next->guest_end <= region->guest_start) {
+ cursor = cursor->next;
+ } else {
+ // This cannot happen!
+ // we should panic here
+ return -1;
+ }
+ }
+
+ // This cannot happen
+ // We should panic here
+ return -1;
+}
+
+
+int delete_shadow_region(struct shadow_map * map,
+ addr_t guest_start,
+ addr_t guest_end) {
+ return -1;
+}
+
+
+
+struct shadow_region *get_shadow_region_by_index(struct shadow_map * map,
+ uint_t index) {
+ struct shadow_region * reg = map->head;
+ uint_t i = 0;
+
+ while (reg) {
+ if (i == index) {
+ return reg;
+ }
+ reg = reg->next;
+ i++;
+ }
+ return NULL;
+}
+
+
+struct shadow_region * get_shadow_region_by_addr(struct shadow_map * map,
+ addr_t addr) {
+ struct shadow_region * reg = map->head;
+
+ while (reg) {
+ if ((reg->guest_start <= addr) && (reg->guest_end > addr)) {
+ return reg;
+ } else if (reg->guest_start > addr) {
+ return NULL;
+ } else {
+ reg = reg->next;
+ }
+ }
+ return NULL;
+}
+
+
+host_region_type_t get_shadow_addr_type(struct guest_info * info, addr_t guest_addr) {
+ struct shadow_region * reg = get_shadow_region_by_addr(&(info->mem_map), guest_addr);
+
+ if (!reg) {
+ return HOST_REGION_INVALID;
+ } else {
+ return reg->host_type;
+ }
+}
+
+addr_t get_shadow_addr(struct guest_info * info, addr_t guest_addr) {
+ struct shadow_region * reg = get_shadow_region_by_addr(&(info->mem_map), guest_addr);
+
+ if (!reg) {
+ return 0;
+ } else {
+ return (guest_addr - reg->guest_start) + reg->host_addr;
+ }
+}
+
+
+host_region_type_t lookup_shadow_map_addr(struct shadow_map * map, addr_t guest_addr, addr_t * host_addr) {
+ struct shadow_region * reg = get_shadow_region_by_addr(map, guest_addr);
+
+ if (!reg) {
+ // No mapping exists
+ return HOST_REGION_INVALID;
+ } else {
+ switch (reg->host_type) {
+ case HOST_REGION_PHYSICAL_MEMORY:
+ *host_addr = (guest_addr - reg->guest_start) + reg->host_addr;
+ return reg->host_type;
+ case HOST_REGION_MEMORY_MAPPED_DEVICE:
+ case HOST_REGION_UNALLOCATED:
+ // ...
+ default:
+ *host_addr = 0;
+ return reg->host_type;
+ }
+ }
+}
+
+
+void print_shadow_map(struct shadow_map * map) {
+ struct shadow_region * cur = map->head;
+ int i = 0;
+
+ PrintDebug("Memory Layout (regions: %d) \n", map->num_regions);
+
+ while (cur) {
+ PrintDebug("%d: 0x%p - 0x%p (%s) -> ", i,
+ (void *)cur->guest_start, (void *)(cur->guest_end - 1),
+ cur->guest_type == GUEST_REGION_PHYSICAL_MEMORY ? "GUEST_REGION_PHYSICAL_MEMORY" :
+ cur->guest_type == GUEST_REGION_NOTHING ? "GUEST_REGION_NOTHING" :
+ cur->guest_type == GUEST_REGION_MEMORY_MAPPED_DEVICE ? "GUEST_REGION_MEMORY_MAPPED_DEVICE" :
+ "UNKNOWN");
+ if (cur->host_type == HOST_REGION_PHYSICAL_MEMORY ||
+ cur->host_type == HOST_REGION_UNALLOCATED ||
+ cur->host_type == HOST_REGION_MEMORY_MAPPED_DEVICE) {
+ PrintDebug("0x%p", (void *)(cur->host_addr));
+ }
+ PrintDebug("(%s)\n",
+ cur->host_type == HOST_REGION_PHYSICAL_MEMORY ? "HOST_REGION_PHYSICAL_MEMORY" :
+ cur->host_type == HOST_REGION_UNALLOCATED ? "HOST_REGION_UNALLOACTED" :
+ cur->host_type == HOST_REGION_HOOK ? "HOST_REGION_HOOK" :
+ cur->host_type == HOST_REGION_MEMORY_MAPPED_DEVICE ? "HOST_REGION_MEMORY_MAPPED_DEVICE" :
+ cur->host_type == HOST_REGION_REMOTE ? "HOST_REGION_REMOTE" :
+ cur->host_type == HOST_REGION_SWAPPED ? "HOST_REGION_SWAPPED" :
+ "UNKNOWN");
+ cur = cur->next;
+ i++;
+ }
+}
+
+
+
+
+
+
+
+
+
+
+#ifdef VMM_MEM_TEST
+
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdarg.h>
+
+
+
+
+
+struct vmm_os_hooks * os_hooks;
+
+void * TestMalloc(uint_t size) {
+ return malloc(size);
+}
+
+void * TestAllocatePages(int size) {
+ return malloc(4096 * size);
+}
+
+
+void TestPrint(const char * fmt, ...) {
+ va_list args;
+
+ va_start(args, fmt);
+ vprintf(fmt, args);
+ va_end(args);
+}
+
+int mem_list_add_test_1( vmm_mem_list_t * list) {
+
+ uint_t offset = 0;
+
+ PrintDebug("\n\nTesting Memory List\n");
+
+ init_mem_list(list);
+
+ offset = PAGE_SIZE * 6;
+ PrintDebug("Adding 0x%x - 0x%x\n", offset, offset + (PAGE_SIZE * 10));
+ add_mem_list_pages(list, offset, 10);
+ print_mem_list(list);
+
+
+ offset = 0;
+ PrintDebug("Adding 0x%x - 0x%x\n", offset, offset + PAGE_SIZE * 4);
+ add_mem_list_pages(list, offset, 4);
+ print_mem_list(list);
+
+ offset = PAGE_SIZE * 20;
+ PrintDebug("Adding 0x%x - 0x%x\n", offset, offset + (PAGE_SIZE * 1));
+ add_mem_list_pages(list, offset, 1);
+ print_mem_list(list);
+
+ offset = PAGE_SIZE * 21;
+ PrintDebug("Adding 0x%x - 0x%x\n", offset, offset + (PAGE_SIZE * 3));
+ add_mem_list_pages(list, offset, 3);
+ print_mem_list(list);
+
+
+ offset = PAGE_SIZE * 10;
+ PrintDebug("Adding 0x%x - 0x%x\n", offset, offset + (PAGE_SIZE * 30));
+ add_mem_list_pages(list, offset, 30);
+ print_mem_list(list);
+
+
+ offset = PAGE_SIZE * 5;
+ PrintDebug("Adding 0x%x - 0x%x\n", offset, offset + (PAGE_SIZE * 1));
+ add_mem_list_pages(list, offset, 1);
+ print_mem_list(list);
+
+
+
+ return 0;
+}
+
+
+int mem_layout_add_test_1(vmm_mem_layout_t * layout) {
+
+
+ uint_t start = 0;
+ uint_t end = 0;
+
+ PrintDebug("\n\nTesting Memory Layout\n");
+
+ init_mem_layout(layout);
+
+ start = 0x6000;
+ end = 0x10000;;
+ PrintDebug("Adding 0x%x - 0x%x\n", start, end);
+ add_guest_mem_range(layout, start, end);
+ print_mem_layout(layout);
+
+
+ start = 0x1000;
+ end = 0x3000;
+ PrintDebug("Adding 0x%x - 0x%x\n", start, end);
+ add_guest_mem_range(layout, start, end);
+ print_mem_layout(layout);
+
+ start = 0x2000;
+ end = 0x6000;
+ PrintDebug("Adding 0x%x - 0x%x\n", start, end);
+ add_guest_mem_range(layout, start, end);
+ print_mem_layout(layout);
+
+ start = 0x4000;
+ end = 0x5000;
+ PrintDebug("Adding 0x%x - 0x%x\n", start, end);
+ add_guest_mem_range(layout, start, end);
+ print_mem_layout(layout);
+
+
+ start = 0x5000;
+ end = 0x7000;
+ PrintDebug("Adding 0x%x - 0x%x\n", start, end);
+ add_guest_mem_range(layout, start, end);
+ print_mem_layout(layout);
+
+
+
+
+ return 0;
+}
+
+
+
+int main(int argc, char ** argv) {
+ struct vmm_os_hooks dummy_hooks;
+ os_hooks = &dummy_hooks;
+
+ vmm_mem_layout_t layout;
+ vmm_mem_list_t list;
+
+ os_hooks->malloc = &TestMalloc;
+ os_hooks->free = &free;
+ os_hooks->print_debug = &TestPrint;
+ os_hooks->allocate_pages = &TestAllocatePages;
+
+
+
+ printf("mem_list_add_test_1: %d\n", mem_list_add_test_1(&list));
+ printf("layout_add_test_1: %d\n", mem_layout_add_test_1(&layout));
+
+ return 0;
+}
+#endif
+
+
+
+
+
+
