cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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apple-gmux.h (918B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 * apple-gmux.h - microcontroller built into dual GPU MacBook Pro & Mac Pro
      4 * Copyright (C) 2015 Lukas Wunner <lukas@wunner.de>
      5 */
      6
      7#ifndef LINUX_APPLE_GMUX_H
      8#define LINUX_APPLE_GMUX_H
      9
     10#include <linux/acpi.h>
     11
     12#define GMUX_ACPI_HID "APP000B"
     13
     14#if IS_ENABLED(CONFIG_APPLE_GMUX)
     15
     16/**
     17 * apple_gmux_present() - detect if gmux is built into the machine
     18 *
     19 * Drivers may use this to activate quirks specific to dual GPU MacBook Pros
     20 * and Mac Pros, e.g. for deferred probing, runtime pm and backlight.
     21 *
     22 * Return: %true if gmux is present and the kernel was configured
     23 * with CONFIG_APPLE_GMUX, %false otherwise.
     24 */
     25static inline bool apple_gmux_present(void)
     26{
     27	return acpi_dev_found(GMUX_ACPI_HID);
     28}
     29
     30#else  /* !CONFIG_APPLE_GMUX */
     31
     32static inline bool apple_gmux_present(void)
     33{
     34	return false;
     35}
     36
     37#endif /* !CONFIG_APPLE_GMUX */
     38
     39#endif /* LINUX_APPLE_GMUX_H */