INIT_LIST_HEAD(&(msr_map->hook_list));
msr_map->num_hooks = 0;
+
+ msr_map->arch_data = NULL;
+ msr_map->update_map = NULL;
+}
+
+int v3_handle_msr_write(struct guest_info * info) {
+ uint_t msr_num = info->vm_regs.rcx;
+ struct v3_msr msr_val;
+ struct v3_msr_hook * hook = NULL;
+
+ hook = v3_get_msr_hook(info, msr_num);
+
+ if (!hook) {
+ PrintError("Hook for MSR write %d not found\n", msr_num);
+ return -1;
+ }
+
+ msr_val.value = 0;
+ msr_val.lo = info->vm_regs.rax;
+ msr_val.hi = info->vm_regs.rdx;
+
+ if (hook->write(msr_num, msr_val, hook->priv_data) == -1) {
+ PrintError("Error in MSR hook Write\n");
+ return -1;
+ }
+
+ info->rip += 2;
+
+ return 0;
}
+int v3_handle_msr_read(struct guest_info * info) {
+ uint_t msr_num = info->vm_regs.rcx;
+ struct v3_msr msr_val;
+ struct v3_msr_hook * hook = NULL;
+
+ hook = v3_get_msr_hook(info, msr_num);
+
+ if (!hook) {
+ PrintError("Hook for MSR read %d not found\n", msr_num);
+ return -1;
+ }
+
+ msr_val.value = 0;
+
+ if (hook->read(msr_num, &msr_val, hook->priv_data) == -1) {
+ PrintError("Error in MSR hook Read\n");
+ return -1;
+ }
+
+ info->vm_regs.rax = msr_val.lo;
+ info->vm_regs.rdx = msr_val.hi;
+
+ info->rip += 2;
+ return 0;
+}
+
int v3_hook_msr(struct guest_info * info, uint_t msr,
int (*read)(uint_t msr, struct v3_msr * dst, void * priv_data),
int (*write)(uint_t msr, struct v3_msr src, void * priv_data),
struct v3_msr_hook * hook = NULL;
hook = (struct v3_msr_hook *)V3_Malloc(sizeof(struct v3_msr_hook));
+
if (hook == NULL) {
PrintError("Could not allocate msr hook for MSR %d\n", msr);
return -1;
list_add(&(hook->link), &(msr_map->hook_list));
+ msr_map->update_map(info, msr,
+ (read == NULL) ? 0 : 1,
+ (write == NULL) ? 0 : 1);
return 0;
}