https://github.com/torvalds/linux
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Tip revision: 49a57857aeea06ca831043acbb0fa5e0f50602fd authored by Linus Torvalds on 21 January 2019, 00:14:44 UTC
Linux 5.0-rc3
Tip revision: 49a5785
platform-quirks.c
// SPDX-License-Identifier: GPL-2.0
#include <linux/kernel.h>
#include <linux/init.h>

#include <asm/setup.h>
#include <asm/bios_ebda.h>

void __init x86_early_init_platform_quirks(void)
{
	x86_platform.legacy.i8042 = X86_LEGACY_I8042_EXPECTED_PRESENT;
	x86_platform.legacy.rtc = 1;
	x86_platform.legacy.warm_reset = 1;
	x86_platform.legacy.reserve_bios_regions = 0;
	x86_platform.legacy.devices.pnpbios = 1;

	switch (boot_params.hdr.hardware_subarch) {
	case X86_SUBARCH_PC:
		x86_platform.legacy.reserve_bios_regions = 1;
		break;
	case X86_SUBARCH_XEN:
		x86_platform.legacy.devices.pnpbios = 0;
		x86_platform.legacy.rtc = 0;
		break;
	case X86_SUBARCH_INTEL_MID:
	case X86_SUBARCH_CE4100:
		x86_platform.legacy.devices.pnpbios = 0;
		x86_platform.legacy.rtc = 0;
		x86_platform.legacy.i8042 = X86_LEGACY_I8042_PLATFORM_ABSENT;
		break;
	}

	if (x86_platform.set_legacy_features)
		x86_platform.set_legacy_features();
}

bool __init x86_pnpbios_disabled(void)
{
	return x86_platform.legacy.devices.pnpbios == 0;
}

#if defined(CONFIG_PNPBIOS)
bool __init arch_pnpbios_disabled(void)
{
	return x86_pnpbios_disabled();
}
#endif
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