arch/x86/kernel/platform-quirks.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/kernel.h>
   3 #include <linux/init.h>
   4
   5 #include <asm/setup.h>
   6 #include <asm/bios_ebda.h>
   7
   8 void __init x86_early_init_platform_quirks(void)
   9 {
  10         x86_platform.legacy.i8042 = X86_LEGACY_I8042_EXPECTED_PRESENT;
  11         x86_platform.legacy.rtc = 1;
  12         x86_platform.legacy.warm_reset = 1;
  13         x86_platform.legacy.reserve_bios_regions = 0;
  14         x86_platform.legacy.devices.pnpbios = 1;
  15
  16         switch (boot_params.hdr.hardware_subarch) {
  17         case X86_SUBARCH_PC:
  18                 x86_platform.legacy.reserve_bios_regions = 1;
  19                 break;
  20         case X86_SUBARCH_XEN:
  21                 x86_platform.legacy.devices.pnpbios = 0;
  22                 x86_platform.legacy.rtc = 0;
  23                 break;
  24         case X86_SUBARCH_INTEL_MID:
  25         case X86_SUBARCH_CE4100:
  26                 x86_platform.legacy.devices.pnpbios = 0;
  27                 x86_platform.legacy.rtc = 0;
  28                 x86_platform.legacy.i8042 = X86_LEGACY_I8042_PLATFORM_ABSENT;
  29                 break;
  30         }
  31
  32         if (x86_platform.set_legacy_features)
  33                 x86_platform.set_legacy_features();
  34 }
  35
  36 #if defined(CONFIG_PNPBIOS)
  37 bool __init arch_pnpbios_disabled(void)
  38 {
  39         return x86_platform.legacy.devices.pnpbios == 0;
  40 }
  41 #endif