src/mainboard/supermicro/x10slm-f/mainboard.c

   1 /* SPDX-License-Identifier: GPL-2.0-or-later */
   2
   3 #include <console/console.h>
   4 #include <device/device.h>
   5 #include <option.h>
   6 #include <types.h>
   7
   8 /*
   9  * Hiding the AST2400 might be desirable to reduce attack surface.
  10  *
  11  * The PCIe root port that the AST2400 is on is disabled, but the
  12  * AST2400 itself likely remains in an enabled state.
  13  *
  14  * The AST2400 is also attached to the LPC. That interface does not get
  15  * disabled.
  16  */
  17 static void hide_ast2400(void)
  18 {
  19         struct device *dev = pcidev_on_root(0x1c, 0);
  20         if (!dev)
  21                 return;
  22
  23         /*
  24          * Marking this device as disabled means that the southbridge code
  25          * will properly disable the root port when it configures it later.
  26          */
  27         dev->enabled = 0;
  28         printk(BIOS_INFO, "The AST2400 is now set to be hidden.\n");
  29 }
  30
  31 static void mainboard_enable(struct device *dev)
  32 {
  33         if (get_uint_option("hide_ast2400", false))
  34                 hide_ast2400();
  35 }
  36
  37 struct chip_operations mainboard_ops = {
  38         CHIP_NAME("X10SLM+-F")
  39         .enable_dev = mainboard_enable,
  40 };