#include <palacios/vmm_direct_paging.h>
-static inline
-struct v3_shadow_region * insert_shadow_region(struct v3_vm_info * vm,
- struct v3_shadow_region * region);
static int mem_offset_hypercall(struct guest_info * info, uint_t hcall_id, void * private_data) {
return 0;
}
+static int unhandled_err(struct guest_info * core, addr_t guest_va, addr_t guest_pa,
+ struct v3_shadow_region * reg, pf_error_t access_info) {
+
+ PrintError("Unhandled memory access error\n");
+
+ v3_print_mem_map(core->vm_info);
+
+ v3_print_guest_state(core);
+
+ return -1;
+}
+
+
int v3_init_mem_map(struct v3_vm_info * vm) {
struct v3_mem_map * map = &(vm->mem_map);
addr_t mem_pages = vm->mem_size >> 12;
- map->shdw_regions.rb_node = NULL;
-
+ memset(&(map->base_region), 0, sizeof(struct v3_shadow_region));
- map->hook_hvas = V3_VAddr(V3_AllocPages(vm->num_cores));
+ map->shdw_regions.rb_node = NULL;
// There is an underlying region that contains all of the guest memory
map->base_region.guest_start = 0;
map->base_region.guest_end = mem_pages * PAGE_SIZE_4KB;
- map->base_region.host_type = SHDW_REGION_ALLOCATED;
map->base_region.host_addr = (addr_t)V3_AllocPages(mem_pages);
+ map->base_region.flags.read = 1;
+ map->base_region.flags.write = 1;
+ map->base_region.flags.exec = 1;
+ map->base_region.flags.base = 1;
+ map->base_region.flags.alloced = 1;
+
+ map->base_region.unhandled = unhandled_err;
if ((void *)map->base_region.host_addr == NULL) {
PrintError("Could not allocate Guest memory\n");
}
-static inline addr_t get_hook_hva(struct guest_info * info) {
- return (addr_t)(info->vm_info->mem_map.hook_hvas + (PAGE_SIZE_4KB * info->cpu_id));
-}
-
-void v3_delete_shadow_map(struct v3_vm_info * vm) {
+void v3_delete_mem_map(struct v3_vm_info * vm) {
struct rb_node * node = v3_rb_first(&(vm->mem_map.shdw_regions));
struct v3_shadow_region * reg;
struct rb_node * tmp_node = NULL;
}
V3_FreePage((void *)(vm->mem_map.base_region.host_addr));
- V3_FreePage(V3_PAddr((void *)(vm->mem_map.hook_hvas)));
}
-
-
-int v3_add_shadow_mem( struct v3_vm_info * vm, uint16_t core_id,
- addr_t guest_addr_start,
- addr_t guest_addr_end,
- addr_t host_addr)
-{
+struct v3_shadow_region * v3_create_mem_region(struct v3_vm_info * vm, uint16_t core_id,
+ addr_t guest_addr_start, addr_t guest_addr_end) {
+
struct v3_shadow_region * entry = (struct v3_shadow_region *)V3_Malloc(sizeof(struct v3_shadow_region));
+ memset(entry, 0, sizeof(struct v3_shadow_region));
entry->guest_start = guest_addr_start;
entry->guest_end = guest_addr_end;
- entry->host_type = SHDW_REGION_ALLOCATED;
- entry->host_addr = host_addr;
- entry->write_hook = NULL;
- entry->read_hook = NULL;
- entry->priv_data = NULL;
entry->core_id = core_id;
+ entry->unhandled = unhandled_err;
- if (insert_shadow_region(vm, entry)) {
- V3_Free(entry);
- return -1;
- }
-
- return 0;
+ return entry;
}
-int v3_hook_write_mem(struct v3_vm_info * vm, uint16_t core_id,
- addr_t guest_addr_start, addr_t guest_addr_end, addr_t host_addr,
- int (*write)(struct guest_info * core, addr_t guest_addr, void * src, uint_t length, void * priv_data),
- void * priv_data) {
- struct v3_shadow_region * entry = (struct v3_shadow_region *)V3_Malloc(sizeof(struct v3_shadow_region));
+int v3_add_shadow_mem( struct v3_vm_info * vm, uint16_t core_id,
+ addr_t guest_addr_start,
+ addr_t guest_addr_end,
+ addr_t host_addr)
+{
+ struct v3_shadow_region * entry = NULL;
+ entry = v3_create_mem_region(vm, core_id,
+ guest_addr_start,
+ guest_addr_end);
- entry->guest_start = guest_addr_start;
- entry->guest_end = guest_addr_end;
- entry->host_type = SHDW_REGION_WRITE_HOOK;
entry->host_addr = host_addr;
- entry->write_hook = write;
- entry->read_hook = NULL;
- entry->priv_data = priv_data;
- entry->core_id = core_id;
- if (insert_shadow_region(vm, entry)) {
- V3_Free(entry);
- return -1;
- }
-
- return 0;
-}
-
-int v3_hook_full_mem(struct v3_vm_info * vm, uint16_t core_id,
- addr_t guest_addr_start, addr_t guest_addr_end,
- int (*read)(struct guest_info * core, addr_t guest_addr, void * dst, uint_t length, void * priv_data),
- int (*write)(struct guest_info * core, addr_t guest_addr, void * src, uint_t length, void * priv_data),
- void * priv_data) {
-
- struct v3_shadow_region * entry = (struct v3_shadow_region *)V3_Malloc(sizeof(struct v3_shadow_region));
- entry->guest_start = guest_addr_start;
- entry->guest_end = guest_addr_end;
- entry->host_type = SHDW_REGION_FULL_HOOK;
- entry->host_addr = (addr_t)NULL;
- entry->write_hook = write;
- entry->read_hook = read;
- entry->priv_data = priv_data;
- entry->core_id = core_id;
+ entry->flags.read = 1;
+ entry->flags.write = 1;
+ entry->flags.exec = 1;
+ entry->flags.alloced = 1;
- if (insert_shadow_region(vm, entry)) {
+ if (v3_insert_shadow_region(vm, entry) == -1) {
V3_Free(entry);
return -1;
}
}
-// This will unhook the memory hook registered at start address
-// We do not support unhooking subregions
-int v3_unhook_mem(struct v3_vm_info * vm, uint16_t core_id, addr_t guest_addr_start) {
- struct v3_shadow_region * reg = v3_get_shadow_region(vm, core_id, guest_addr_start);
-
- if ((reg->host_type != SHDW_REGION_FULL_HOOK) ||
- (reg->host_type != SHDW_REGION_WRITE_HOOK)) {
- PrintError("Trying to unhook a non hooked memory region (addr=%p)\n", (void *)guest_addr_start);
- return -1;
- }
-
- v3_delete_shadow_region(vm, reg);
-
- return 0;
-}
-
-
static inline
struct v3_shadow_region * __insert_shadow_region(struct v3_vm_info * vm,
}
-static inline
-struct v3_shadow_region * insert_shadow_region(struct v3_vm_info * vm,
- struct v3_shadow_region * region) {
+
+int v3_insert_shadow_region(struct v3_vm_info * vm,
+ struct v3_shadow_region * region) {
struct v3_shadow_region * ret;
int i = 0;
if ((ret = __insert_shadow_region(vm, region))) {
- return ret;
+ return -1;
}
v3_rb_insert_color(&(region->tree_node), &(vm->mem_map.shdw_regions));
}
}
- return NULL;
-}
-
-
-
-
-int handle_special_page_fault(struct guest_info * info,
- addr_t fault_gva, addr_t fault_gpa, pf_error_t access_info)
-{
- struct v3_shadow_region * reg = v3_get_shadow_region(info->vm_info, info->cpu_id, fault_gpa);
-
- PrintDebug("Handling Special Page Fault\n");
-
- switch (reg->host_type) {
- case SHDW_REGION_WRITE_HOOK:
- return v3_handle_mem_wr_hook(info, fault_gva, fault_gpa, reg, access_info);
- case SHDW_REGION_FULL_HOOK:
- return v3_handle_mem_full_hook(info, fault_gva, fault_gpa, reg, access_info);
- default:
- return -1;
- }
-
- return 0;
-
-}
-
-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) {
-
- addr_t dst_addr = (addr_t)V3_VAddr((void *)v3_get_shadow_addr(reg, info->cpu_id, guest_pa));
-
- if (v3_emulate_write_op(info, guest_va, guest_pa, dst_addr,
- reg->write_hook, reg->priv_data) == -1) {
- PrintError("Write hook emulation failed\n");
- return -1;
- }
-
- return 0;
-}
-
-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) {
-
- addr_t op_addr = get_hook_hva(info);
-
- if (access_info.write == 1) {
- if (v3_emulate_write_op(info, guest_va, guest_pa, op_addr,
- reg->write_hook, reg->priv_data) == -1) {
- PrintError("Write Full Hook emulation failed\n");
- return -1;
- }
- } else {
- if (v3_emulate_read_op(info, guest_va, guest_pa, op_addr,
- reg->read_hook, reg->write_hook,
- reg->priv_data) == -1) {
- PrintError("Read Full Hook emulation failed\n");
- return -1;
- }
- }
-
return 0;
}
+
}
+
+
void v3_delete_shadow_region(struct v3_vm_info * vm, struct v3_shadow_region * reg) {
int i = 0;
addr_t v3_get_shadow_addr(struct v3_shadow_region * reg, uint16_t core_id, addr_t guest_addr) {
- if ( (reg) &&
- (reg->host_type != SHDW_REGION_FULL_HOOK)) {
+ if (reg && (reg->flags.alloced == 1)) {
return (guest_addr - reg->guest_start) + reg->host_addr;
} else {
// PrintError("MEM Region Invalid\n");
(void *)(reg->guest_end - 1),
(void *)(reg->host_addr));
- V3_Print("\t(%s) (WriteHook = 0x%p) (ReadHook = 0x%p)\n",
- v3_shdw_region_type_to_str(reg->host_type),
- (void *)(reg->write_hook),
- (void *)(reg->read_hook));
+ V3_Print("\t(flags=%x) (unhandled = 0x%p)\n",
+ reg->flags.value,
+ reg->unhandled);
i++;
} while ((node = v3_rb_next(node)));
}
-
-static const uchar_t SHDW_REGION_WRITE_HOOK_STR[] = "SHDW_REGION_WRITE_HOOK";
-static const uchar_t SHDW_REGION_FULL_HOOK_STR[] = "SHDW_REGION_FULL_HOOK";
-static const uchar_t SHDW_REGION_ALLOCATED_STR[] = "SHDW_REGION_ALLOCATED";
-
-const uchar_t * v3_shdw_region_type_to_str(v3_shdw_region_type_t type) {
- switch (type) {
- case SHDW_REGION_WRITE_HOOK:
- return SHDW_REGION_WRITE_HOOK_STR;
- case SHDW_REGION_FULL_HOOK:
- return SHDW_REGION_FULL_HOOK_STR;
- case SHDW_REGION_ALLOCATED:
- return SHDW_REGION_ALLOCATED_STR;
- default:
- return (uchar_t *)"SHDW_REGION_INVALID";
- }
-}
-