#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);
map->shdw_regions.rb_node = NULL;
- map->hook_hvas = V3_VAddr(V3_AllocPages(vm->num_cores));
-
-
// There is an underlying region that contains all of the guest memory
// PrintDebug("Mapping %d pages of memory (%u bytes)\n", (int)mem_pages, (uint_t)info->mem_size);
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_addr = host_addr;
- entry->write_hook = NULL;
- entry->read_hook = NULL;
- entry->priv_data = NULL;
entry->core_id = core_id;
+ entry->unhandled = unhandled_err;
- entry->flags.read = 1;
- entry->flags.write = 1;
- entry->flags.exec = 1;
- entry->flags.alloced = 1;
-
- 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));
- memset(entry, 0, 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_addr = host_addr;
- entry->write_hook = write;
- entry->read_hook = NULL;
- entry->priv_data = priv_data;
- entry->core_id = core_id;
- entry->flags.hook = 1;
+
entry->flags.read = 1;
+ entry->flags.write = 1;
entry->flags.exec = 1;
entry->flags.alloced = 1;
-
- 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));
- memset(entry, 0, sizeof(struct v3_shadow_region));
-
- entry->guest_start = guest_addr_start;
- entry->guest_end = guest_addr_end;
- 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.hook = 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->flags.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 v3_handle_mem_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 = 0;
-
- if (reg->flags.alloced == 0) {
- op_addr = get_hook_hva(info);
- } else {
- op_addr = (addr_t)V3_VAddr((void *)v3_get_shadow_addr(reg, info->cpu_id, guest_pa));
- }
-
-
- if (access_info.write == 1) {
- // Write Operation
-
- 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 {
- // Read Operation
-
- if (reg->flags.read == 1) {
- PrintError("Tried to emulate read for a guest Readable page\n");
- return -1;
- }
-
- 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 *)(reg->guest_end - 1),
(void *)(reg->host_addr));
- V3_Print("\t(flags=%x) (WriteHook = 0x%p) (ReadHook = 0x%p)\n",
+ V3_Print("\t(flags=%x) (unhandled = 0x%p)\n",
reg->flags.value,
- (void *)(reg->write_hook),
- (void *)(reg->read_hook));
+ reg->unhandled);
i++;
} while ((node = v3_rb_next(node)));
