Port yuzu-emu/yuzu#11946: "Enable (Feral Interactive) Gamemode on Linux" (#7245)

externals/CMakeLists.txt

@@ -319,6 +319,10 @@ if(ANDROID)
     target_link_libraries(httplib INTERFACE ifaddrs)
 endif()
 
+if (UNIX AND NOT APPLE)
+    add_subdirectory(gamemode)
+endif()
+
 # cpp-jwt
 if (ENABLE_WEB_SERVICE)
     if (USE_SYSTEM_CPP_JWT)

externals/gamemode/CMakeLists.txt

@@ -0,0 +1,11 @@
+# SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+project(gamemode LANGUAGES CXX C)
+
+add_library(gamemode include/gamemode_client.h)
+
+target_link_libraries(gamemode PRIVATE common)
+
+target_include_directories(gamemode PUBLIC include)
+set_target_properties(gamemode PROPERTIES LINKER_LANGUAGE C)

externals/gamemode/include/gamemode_client.h

@@ -0,0 +1,379 @@
+// SPDX-FileCopyrightText: Copyright 2017-2019 Feral Interactive
+// SPDX-License-Identifier: BSD-3-Clause
+
+/*
+
+Copyright (c) 2017-2019, Feral Interactive
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+ * Redistributions of source code must retain the above copyright notice,
+   this list of conditions and the following disclaimer.
+ * Redistributions in binary form must reproduce the above copyright
+   notice, this list of conditions and the following disclaimer in the
+   documentation and/or other materials provided with the distribution.
+ * Neither the name of Feral Interactive nor the names of its contributors
+   may be used to endorse or promote products derived from this software
+   without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.
+
+ */
+#ifndef CLIENT_GAMEMODE_H
+#define CLIENT_GAMEMODE_H
+/*
+ * GameMode supports the following client functions
+ * Requests are refcounted in the daemon
+ *
+ * int gamemode_request_start() - Request gamemode starts
+ *   0 if the request was sent successfully
+ *   -1 if the request failed
+ *
+ * int gamemode_request_end() - Request gamemode ends
+ *   0 if the request was sent successfully
+ *   -1 if the request failed
+ *
+ * GAMEMODE_AUTO can be defined to make the above two functions apply during static init and
+ * destruction, as appropriate. In this configuration, errors will be printed to stderr
+ *
+ * int gamemode_query_status() - Query the current status of gamemode
+ *   0 if gamemode is inactive
+ *   1 if gamemode is active
+ *   2 if gamemode is active and this client is registered
+ *   -1 if the query failed
+ *
+ * int gamemode_request_start_for(pid_t pid) - Request gamemode starts for another process
+ *   0 if the request was sent successfully
+ *   -1 if the request failed
+ *   -2 if the request was rejected
+ *
+ * int gamemode_request_end_for(pid_t pid) - Request gamemode ends for another process
+ *   0 if the request was sent successfully
+ *   -1 if the request failed
+ *   -2 if the request was rejected
+ *
+ * int gamemode_query_status_for(pid_t pid) - Query status of gamemode for another process
+ *   0 if gamemode is inactive
+ *   1 if gamemode is active
+ *   2 if gamemode is active and this client is registered
+ *   -1 if the query failed
+ *
+ * const char* gamemode_error_string() - Get an error string
+ *   returns a string describing any of the above errors
+ *
+ * Note: All the above requests can be blocking - dbus requests can and will block while the daemon
+ * handles the request. It is not recommended to make these calls in performance critical code
+ */
+
+#include <stdbool.h>
+#include <stdio.h>
+
+#include <dlfcn.h>
+#include <string.h>
+
+#include <assert.h>
+
+#include <sys/types.h>
+
+static char internal_gamemode_client_error_string[512] = { 0 };
+
+/**
+ * Load libgamemode dynamically to dislodge us from most dependencies.
+ * This allows clients to link and/or use this regardless of runtime.
+ * See SDL2 for an example of the reasoning behind this in terms of
+ * dynamic versioning as well.
+ */
+static volatile int internal_libgamemode_loaded = 1;
+
+/* Typedefs for the functions to load */
+typedef int (*api_call_return_int)(void);
+typedef const char *(*api_call_return_cstring)(void);
+typedef int (*api_call_pid_return_int)(pid_t);
+
+/* Storage for functors */
+static api_call_return_int REAL_internal_gamemode_request_start = NULL;
+static api_call_return_int REAL_internal_gamemode_request_end = NULL;
+static api_call_return_int REAL_internal_gamemode_query_status = NULL;
+static api_call_return_cstring REAL_internal_gamemode_error_string = NULL;
+static api_call_pid_return_int REAL_internal_gamemode_request_start_for = NULL;
+static api_call_pid_return_int REAL_internal_gamemode_request_end_for = NULL;
+static api_call_pid_return_int REAL_internal_gamemode_query_status_for = NULL;
+
+/**
+ * Internal helper to perform the symbol binding safely.
+ *
+ * Returns 0 on success and -1 on failure
+ */
+__attribute__((always_inline)) static inline int internal_bind_libgamemode_symbol(
+    void *handle, const char *name, void **out_func, size_t func_size, bool required)
+{
+	void *symbol_lookup = NULL;
+	char *dl_error = NULL;
+
+	/* Safely look up the symbol */
+	symbol_lookup = dlsym(handle, name);
+	dl_error = dlerror();
+	if (required && (dl_error || !symbol_lookup)) {
+		snprintf(internal_gamemode_client_error_string,
+		         sizeof(internal_gamemode_client_error_string),
+		         "dlsym failed - %s",
+		         dl_error);
+		return -1;
+	}
+
+	/* Have the symbol correctly, copy it to make it usable */
+	memcpy(out_func, &symbol_lookup, func_size);
+	return 0;
+}
+
+/**
+ * Loads libgamemode and needed functions
+ *
+ * Returns 0 on success and -1 on failure
+ */
+__attribute__((always_inline)) static inline int internal_load_libgamemode(void)
+{
+	/* We start at 1, 0 is a success and -1 is a fail */
+	if (internal_libgamemode_loaded != 1) {
+		return internal_libgamemode_loaded;
+	}
+
+	/* Anonymous struct type to define our bindings */
+	struct binding {
+		const char *name;
+		void **functor;
+		size_t func_size;
+		bool required;
+	} bindings[] = {
+		{ "real_gamemode_request_start",
+		  (void **)&REAL_internal_gamemode_request_start,
+		  sizeof(REAL_internal_gamemode_request_start),
+		  true },
+		{ "real_gamemode_request_end",
+		  (void **)&REAL_internal_gamemode_request_end,
+		  sizeof(REAL_internal_gamemode_request_end),
+		  true },
+		{ "real_gamemode_query_status",
+		  (void **)&REAL_internal_gamemode_query_status,
+		  sizeof(REAL_internal_gamemode_query_status),
+		  false },
+		{ "real_gamemode_error_string",
+		  (void **)&REAL_internal_gamemode_error_string,
+		  sizeof(REAL_internal_gamemode_error_string),
+		  true },
+		{ "real_gamemode_request_start_for",
+		  (void **)&REAL_internal_gamemode_request_start_for,
+		  sizeof(REAL_internal_gamemode_request_start_for),
+		  false },
+		{ "real_gamemode_request_end_for",
+		  (void **)&REAL_internal_gamemode_request_end_for,
+		  sizeof(REAL_internal_gamemode_request_end_for),
+		  false },
+		{ "real_gamemode_query_status_for",
+		  (void **)&REAL_internal_gamemode_query_status_for,
+		  sizeof(REAL_internal_gamemode_query_status_for),
+		  false },
+	};
+
+	void *libgamemode = NULL;
+
+	/* Try and load libgamemode */
+	libgamemode = dlopen("libgamemode.so.0", RTLD_NOW);
+	if (!libgamemode) {
+		/* Attempt to load unversioned library for compatibility with older
+		 * versions (as of writing, there are no ABI changes between the two -
+		 * this may need to change if ever ABI-breaking changes are made) */
+		libgamemode = dlopen("libgamemode.so", RTLD_NOW);
+		if (!libgamemode) {
+			snprintf(internal_gamemode_client_error_string,
+			         sizeof(internal_gamemode_client_error_string),
+			         "dlopen failed - %s",
+			         dlerror());
+			internal_libgamemode_loaded = -1;
+			return -1;
+		}
+	}
+
+	/* Attempt to bind all symbols */
+	for (size_t i = 0; i < sizeof(bindings) / sizeof(bindings[0]); i++) {
+		struct binding *binder = &bindings[i];
+
+		if (internal_bind_libgamemode_symbol(libgamemode,
+		                                     binder->name,
+		                                     binder->functor,
+		                                     binder->func_size,
+		                                     binder->required)) {
+			internal_libgamemode_loaded = -1;
+			return -1;
+		};
+	}
+
+	/* Success */
+	internal_libgamemode_loaded = 0;
+	return 0;
+}
+
+/**
+ * Redirect to the real libgamemode
+ */
+__attribute__((always_inline)) static inline const char *gamemode_error_string(void)
+{
+	/* If we fail to load the system gamemode, or we have an error string already, return our error
+	 * string instead of diverting to the system version */
+	if (internal_load_libgamemode() < 0 || internal_gamemode_client_error_string[0] != '\0') {
+		return internal_gamemode_client_error_string;
+	}
+
+	/* Assert for static analyser that the function is not NULL */
+	assert(REAL_internal_gamemode_error_string != NULL);
+
+	return REAL_internal_gamemode_error_string();
+}
+
+/**
+ * Redirect to the real libgamemode
+ * Allow automatically requesting game mode
+ * Also prints errors as they happen.
+ */
+#ifdef GAMEMODE_AUTO
+__attribute__((constructor))
+#else
+__attribute__((always_inline)) static inline
+#endif
+int gamemode_request_start(void)
+{
+	/* Need to load gamemode */
+	if (internal_load_libgamemode() < 0) {
+#ifdef GAMEMODE_AUTO
+		fprintf(stderr, "gamemodeauto: %s\n", gamemode_error_string());
+#endif
+		return -1;
+	}
+
+	/* Assert for static analyser that the function is not NULL */
+	assert(REAL_internal_gamemode_request_start != NULL);
+
+	if (REAL_internal_gamemode_request_start() < 0) {
+#ifdef GAMEMODE_AUTO
+		fprintf(stderr, "gamemodeauto: %s\n", gamemode_error_string());
+#endif
+		return -1;
+	}
+
+	return 0;
+}
+
+/* Redirect to the real libgamemode */
+#ifdef GAMEMODE_AUTO
+__attribute__((destructor))
+#else
+__attribute__((always_inline)) static inline
+#endif
+int gamemode_request_end(void)
+{
+	/* Need to load gamemode */
+	if (internal_load_libgamemode() < 0) {
+#ifdef GAMEMODE_AUTO
+		fprintf(stderr, "gamemodeauto: %s\n", gamemode_error_string());
+#endif
+		return -1;
+	}
+
+	/* Assert for static analyser that the function is not NULL */
+	assert(REAL_internal_gamemode_request_end != NULL);
+
+	if (REAL_internal_gamemode_request_end() < 0) {
+#ifdef GAMEMODE_AUTO
+		fprintf(stderr, "gamemodeauto: %s\n", gamemode_error_string());
+#endif
+		return -1;
+	}
+
+	return 0;
+}
+
+/* Redirect to the real libgamemode */
+__attribute__((always_inline)) static inline int gamemode_query_status(void)
+{
+	/* Need to load gamemode */
+	if (internal_load_libgamemode() < 0) {
+		return -1;
+	}
+
+	if (REAL_internal_gamemode_query_status == NULL) {
+		snprintf(internal_gamemode_client_error_string,
+		         sizeof(internal_gamemode_client_error_string),
+		         "gamemode_query_status missing (older host?)");
+		return -1;
+	}
+
+	return REAL_internal_gamemode_query_status();
+}
+
+/* Redirect to the real libgamemode */
+__attribute__((always_inline)) static inline int gamemode_request_start_for(pid_t pid)
+{
+	/* Need to load gamemode */
+	if (internal_load_libgamemode() < 0) {
+		return -1;
+	}
+
+	if (REAL_internal_gamemode_request_start_for == NULL) {
+		snprintf(internal_gamemode_client_error_string,
+		         sizeof(internal_gamemode_client_error_string),
+		         "gamemode_request_start_for missing (older host?)");
+		return -1;
+	}
+
+	return REAL_internal_gamemode_request_start_for(pid);
+}
+
+/* Redirect to the real libgamemode */
+__attribute__((always_inline)) static inline int gamemode_request_end_for(pid_t pid)
+{
+	/* Need to load gamemode */
+	if (internal_load_libgamemode() < 0) {
+		return -1;
+	}
+
+	if (REAL_internal_gamemode_request_end_for == NULL) {
+		snprintf(internal_gamemode_client_error_string,
+		         sizeof(internal_gamemode_client_error_string),
+		         "gamemode_request_end_for missing (older host?)");
+		return -1;
+	}
+
+	return REAL_internal_gamemode_request_end_for(pid);
+}
+
+/* Redirect to the real libgamemode */
+__attribute__((always_inline)) static inline int gamemode_query_status_for(pid_t pid)
+{
+	/* Need to load gamemode */
+	if (internal_load_libgamemode() < 0) {
+		return -1;
+	}
+
+	if (REAL_internal_gamemode_query_status_for == NULL) {
+		snprintf(internal_gamemode_client_error_string,
+		         sizeof(internal_gamemode_client_error_string),
+		         "gamemode_query_status_for missing (older host?)");
+		return -1;
+	}
+
+	return REAL_internal_gamemode_query_status_for(pid);
+}
+
+#endif // CLIENT_GAMEMODE_H

src/citra/citra.cpp

@@ -38,6 +38,10 @@
 #include "network/network.h"
 #include "video_core/renderer_base.h"
 
+#ifdef __unix__
+#include "common/linux/gamemode.h"
+#endif
+
 #undef _UNICODE
 #include <getopt.h>
 #ifndef _MSC_VER
@@ -442,6 +446,10 @@ int main(int argc, char** argv) {
         }
     }
 
+#ifdef __unix__
+    Common::Linux::StartGamemode();
+#endif
+
     std::thread main_render_thread([&emu_window] { emu_window->Present(); });
     std::thread secondary_render_thread([&secondary_window] {
         if (secondary_window) {
@@ -493,6 +501,10 @@ int main(int argc, char** argv) {
 
     system.Shutdown();
 
+#ifdef __unix__
+    Common::Linux::StopGamemode();
+#endif
+
     detached_tasks.WaitForAllTasks();
     return 0;
 }

src/citra_qt/CMakeLists.txt

@@ -308,7 +308,7 @@ if (NOT WIN32)
 endif()
 
 if (UNIX AND NOT APPLE)
-    target_link_libraries(citra-qt PRIVATE Qt6::DBus)
+    target_link_libraries(citra-qt PRIVATE Qt6::DBus gamemode)
 endif()
 
 target_compile_definitions(citra-qt PRIVATE

src/citra_qt/configuration/config.cpp

@@ -528,6 +528,7 @@ void Config::ReadMiscellaneousValues() {
     qt_config->beginGroup(QStringLiteral("Miscellaneous"));
 
     ReadBasicSetting(Settings::values.log_filter);
+    ReadBasicSetting(Settings::values.enable_gamemode);
 
     qt_config->endGroup();
 }
@@ -1044,6 +1045,7 @@ void Config::SaveMiscellaneousValues() {
     qt_config->beginGroup(QStringLiteral("Miscellaneous"));
 
     WriteBasicSetting(Settings::values.log_filter);
+    WriteBasicSetting(Settings::values.enable_gamemode);
 
     qt_config->endGroup();
 }

src/citra_qt/configuration/configure_general.cpp

@@ -36,6 +36,9 @@ ConfigureGeneral::ConfigureGeneral(QWidget* parent)
     ui->emulation_speed_combo->setVisible(!Settings::IsConfiguringGlobal());
     ui->screenshot_combo->setVisible(!Settings::IsConfiguringGlobal());
     ui->updateBox->setVisible(UISettings::values.updater_found);
+#ifndef __unix__
+    ui->toggle_gamemode->setVisible(false);
+#endif
 
     SetupPerGameUI();
     SetConfiguration();
@@ -76,6 +79,9 @@ void ConfigureGeneral::SetConfiguration() {
         ui->toggle_update_check->setChecked(
             UISettings::values.check_for_update_on_start.GetValue());
         ui->toggle_auto_update->setChecked(UISettings::values.update_on_close.GetValue());
+#ifdef __unix__
+        ui->toggle_gamemode->setChecked(Settings::values.enable_gamemode.GetValue());
+#endif
     }
 
     if (Settings::values.frame_limit.GetValue() == 0) {
@@ -172,6 +178,9 @@ void ConfigureGeneral::ApplyConfiguration() {
 
         UISettings::values.check_for_update_on_start = ui->toggle_update_check->isChecked();
         UISettings::values.update_on_close = ui->toggle_auto_update->isChecked();
+#ifdef __unix__
+        Settings::values.enable_gamemode = ui->toggle_gamemode->isChecked();
+#endif
     }
 }
 
@@ -201,6 +210,7 @@ void ConfigureGeneral::SetupPerGameUI() {
     ui->general_group->setVisible(false);
     ui->updateBox->setVisible(false);
     ui->button_reset_defaults->setVisible(false);
+    ui->toggle_gamemode->setVisible(false);
 
     ConfigurationShared::SetColoredComboBox(
         ui->region_combobox, ui->widget_region,

src/citra_qt/configuration/configure_general.ui

@@ -43,6 +43,13 @@
           </property>
          </widget>
         </item>
+        <item>
+         <widget class="QCheckBox" name="toggle_gamemode">
+          <property name="text">
+           <string>Enable Gamemode</string>
+          </property>
+         </widget>
+        </item>
        </layout>
       </widget>
      </item>

src/citra_qt/main.cpp

@@ -26,6 +26,7 @@
 #include <QVariant>
 #include <QtDBus/QDBusInterface>
 #include <QtDBus/QtDBus>
+#include "common/linux/gamemode.h"
 #endif
 #include "citra_qt/aboutdialog.h"
 #include "citra_qt/applets/mii_selector.h"
@@ -182,6 +183,10 @@ GMainWindow::GMainWindow(Core::System& system_)
 
     Debugger::ToggleConsole();
 
+#ifdef __unix__
+    SetGamemodeEnabled(Settings::values.enable_gamemode.GetValue());
+#endif
+
     // register types to use in slots and signals
     qRegisterMetaType<std::size_t>("std::size_t");
     qRegisterMetaType<Service::AM::InstallStatus>("Service::AM::InstallStatus");
@@ -1323,6 +1328,10 @@ void GMainWindow::ShutdownGame() {
 
     discord_rpc->Update();
 
+#ifdef __unix__
+    Common::Linux::StopGamemode();
+#endif
+
     // The emulation is stopped, so closing the window or not does not matter anymore
     disconnect(render_window, &GRenderWindow::Closed, this, &GMainWindow::OnStopGame);
     disconnect(secondary_window, &GRenderWindow::Closed, this, &GMainWindow::OnStopGame);
@@ -1834,6 +1843,10 @@ void GMainWindow::OnStartGame() {
 
     discord_rpc->Update();
 
+#ifdef __unix__
+    Common::Linux::StartGamemode();
+#endif
+
     UpdateSaveStates();
     UpdateAPIIndicator();
 }
@@ -1852,6 +1865,10 @@ void GMainWindow::OnPauseGame() {
 
     UpdateMenuState();
     AllowOSSleep();
+
+#ifdef __unix__
+    Common::Linux::StopGamemode();
+#endif
 }
 
 void GMainWindow::OnPauseContinueGame() {
@@ -2076,15 +2093,25 @@ void GMainWindow::OnConfigure() {
     const auto old_input_profiles = Settings::values.input_profiles;
     const auto old_touch_from_button_maps = Settings::values.touch_from_button_maps;
     const bool old_discord_presence = UISettings::values.enable_discord_presence.GetValue();
+#ifdef __unix__
+    const bool old_gamemode = Settings::values.enable_gamemode.GetValue();
+#endif
     auto result = configureDialog.exec();
     game_list->SetDirectoryWatcherEnabled(true);
     if (result == QDialog::Accepted) {
         configureDialog.ApplyConfiguration();
         InitializeHotkeys();
-        if (UISettings::values.theme != old_theme)
+        if (UISettings::values.theme != old_theme) {
             UpdateUITheme();
-        if (UISettings::values.enable_discord_presence.GetValue() != old_discord_presence)
+        }
+        if (UISettings::values.enable_discord_presence.GetValue() != old_discord_presence) {
             SetDiscordEnabled(UISettings::values.enable_discord_presence.GetValue());
+        }
+#ifdef __unix__
+        if (Settings::values.enable_gamemode.GetValue() != old_gamemode) {
+            SetGamemodeEnabled(Settings::values.enable_gamemode.GetValue());
+        }
+#endif
         if (!multiplayer_state->IsHostingPublicRoom())
             multiplayer_state->UpdateCredentials();
         emit UpdateThemedIcons();
@@ -2931,6 +2958,14 @@ void GMainWindow::SetDiscordEnabled([[maybe_unused]] bool state) {
     discord_rpc->Update();
 }
 
+#ifdef __unix__
+void GMainWindow::SetGamemodeEnabled(bool state) {
+    if (emulation_running) {
+        Common::Linux::SetGamemodeState(state);
+    }
+}
+#endif
+
 #ifdef main
 #undef main
 #endif

src/citra_qt/main.h

@@ -276,6 +276,9 @@ private:
     void ShowMouseCursor();
     void OpenPerGameConfiguration(u64 title_id, const QString& file_name);
     void UpdateAPIIndicator(bool update = false);
+#ifdef __unix__
+    void SetGamemodeEnabled(bool state);
+#endif
 
     std::unique_ptr<Ui::MainWindow> ui;
     Core::System& system;

src/common/CMakeLists.txt

@@ -154,6 +154,15 @@ add_library(citra_common STATIC
     zstd_compression.h
 )
 
+if (UNIX AND NOT APPLE)
+  target_sources(citra_common PRIVATE
+    linux/gamemode.cpp
+    linux/gamemode.h
+  )
+
+  target_link_libraries(citra_common PRIVATE gamemode)
+endif()
+
 if (APPLE)
     target_sources(citra_common PUBLIC
         apple_authorization.h

src/common/linux/gamemode.cpp

@@ -0,0 +1,39 @@
+// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <gamemode_client.h>
+
+#include "common/linux/gamemode.h"
+#include "common/settings.h"
+
+namespace Common::Linux {
+
+void StartGamemode() {
+    if (Settings::values.enable_gamemode) {
+        if (gamemode_request_start() < 0) {
+            LOG_WARNING(Frontend, "Failed to start gamemode: {}", gamemode_error_string());
+        } else {
+            LOG_INFO(Frontend, "Started gamemode");
+        }
+    }
+}
+
+void StopGamemode() {
+    if (Settings::values.enable_gamemode) {
+        if (gamemode_request_end() < 0) {
+            LOG_WARNING(Frontend, "Failed to stop gamemode: {}", gamemode_error_string());
+        } else {
+            LOG_INFO(Frontend, "Stopped gamemode");
+        }
+    }
+}
+
+void SetGamemodeState(bool state) {
+    if (state) {
+        StartGamemode();
+    } else {
+        StopGamemode();
+    }
+}
+
+} // namespace Common::Linux

src/common/linux/gamemode.h

@@ -0,0 +1,24 @@
+// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#pragma once
+
+namespace Common::Linux {
+
+/**
+ * Start the (Feral Interactive) Linux gamemode if it is installed and it is activated
+ */
+void StartGamemode();
+
+/**
+ * Stop the (Feral Interactive) Linux gamemode if it is installed and it is activated
+ */
+void StopGamemode();
+
+/**
+ * Start or stop the (Feral Interactive) Linux gamemode if it is installed and it is activated
+ * @param state The new state the gamemode should have
+ */
+void SetGamemodeState(bool state);
+
+} // namespace Common::Linux

src/common/settings.h

@@ -421,6 +421,8 @@ struct Values {
     std::vector<InputProfile> input_profiles; ///< The list of input profiles
     std::vector<TouchFromButtonMap> touch_from_button_maps;
 
+    SwitchableSetting<bool> enable_gamemode{true, "enable_gamemode"};
+
     // Core
     Setting<bool> use_cpu_jit{true, "use_cpu_jit"};
     SwitchableSetting<s32, true> cpu_clock_percentage{100, 5, 400, "cpu_clock_percentage"};