| /* SPDX-License-Identifier: GPL-2.0-or-later */ |
| |
| #include <console/console.h> |
| #include <device/device.h> |
| #include <option.h> |
| #include <types.h> |
| |
| /* |
| * Hiding the AST2400 might be desirable to reduce attack surface. |
| * |
| * The PCIe root port that the AST2400 is on is disabled, but the |
| * AST2400 itself likely remains in an enabled state. |
| * |
| * The AST2400 is also attached to the LPC. That interface does not get |
| * disabled. |
| */ |
| static void hide_ast2400(void) |
| { |
| struct device *dev = pcidev_on_root(0x1c, 0); |
| if (!dev) |
| return; |
| |
| /* |
| * Marking this device as disabled means that the southbridge code |
| * will properly disable the root port when it configures it later. |
| */ |
| dev->enabled = 0; |
| printk(BIOS_INFO, "The AST2400 is now set to be hidden.\n"); |
| } |
| |
| static void mainboard_enable(struct device *dev) |
| { |
| if (get_uint_option("hide_ast2400", false)) |
| hide_ast2400(); |
| } |
| |
| struct chip_operations mainboard_ops = { |
| CHIP_NAME("X10SLM+-F") |
| .enable_dev = mainboard_enable, |
| }; |