  memset(vgpu_cfg_space(vgpu) + PCI_BASE_ADDRESS_0, 0, 0);  memset(vgpu_cfg_space(vgpu) + PCI_BASE_ADDRESS_0, 0, 0);  memset(vgpu_cfg_space(vgpu) + PCI_BASE_ADDRESS_0, 0, 0);  memset(vgpu_cfg_space(vgpu) + 