starnix_kernel_runner/
features.rs

1// Copyright 2021 The Fuchsia Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5use crate::ContainerStartInfo;
6use anyhow::{Context, Error, anyhow};
7use fidl_fuchsia_ui_composition as fuicomposition;
8use fidl_fuchsia_ui_input3 as fuiinput;
9use fidl_fuchsia_ui_policy as fuipolicy;
10use fidl_fuchsia_ui_views as fuiviews;
11use starnix_consent_sync::init as consent_sync_init;
12use starnix_container_structured_config::Config as ContainerStructuredConfig;
13use starnix_core::device::block::add_mmc_block_device;
14use starnix_core::mm::MlockPinFlavor;
15use starnix_core::task::{CurrentTask, Kernel, KernelFeatures, SystemLimits, ThreadLockupDetector};
16use starnix_core::vfs::FsString;
17use starnix_features::Feature;
18use starnix_logging::log_error;
19use starnix_modules_android_usb::usb_device_init;
20use starnix_modules_ashmem::ashmem_device_init;
21use starnix_modules_boot::booted_device_init;
22use starnix_modules_fastrpc::fastrpc_device_init;
23use starnix_modules_framebuffer::{AspectRatio, Framebuffer};
24use starnix_modules_gpu::gpu_device_init;
25use starnix_modules_gralloc::gralloc_device_init;
26use starnix_modules_hvdcp_opti::hvdcp_opti_init;
27use starnix_modules_input::uinput::register_uinput_device;
28use starnix_modules_input::{
29    DEFAULT_KEYBOARD_DEVICE_ID, DEFAULT_MOUSE_DEVICE_ID, DEFAULT_TOUCH_DEVICE_ID, EventProxyMode,
30    InputDevice, new_input_relay,
31};
32use starnix_modules_kgsl::kgsl_device_init;
33use starnix_modules_magma::magma_device_init;
34use starnix_modules_nanohub::nanohub_device_init;
35use starnix_modules_nmfs::nmfs_init;
36use starnix_modules_perfetto_consumer::start_perfetto_consumer_thread;
37use starnix_modules_thermal::{cooling_device_init, thermal_device_init};
38use starnix_modules_touch_power_policy::TouchPowerPolicyDevice;
39use starnix_modules_wakeup_test::register_wakeup_test_device;
40use starnix_sync::{Locked, Unlocked};
41use starnix_uapi::error;
42use starnix_uapi::errors::Errno;
43
44/// A collection of parsed features, and their arguments.
45#[derive(Default, Debug)]
46pub struct Features {
47    /// Features that must be available to the kernel after initialization.
48    pub kernel: KernelFeatures,
49
50    /// SELinux configuration.
51    pub selinux: SELinuxFeature,
52
53    /// Limits value passed to the kernel during the initialization.
54    pub system_limits: SystemLimits,
55
56    /// Whether to enable ashmem.
57    pub ashmem: bool,
58
59    /// Whether to enable a boot notifier device.
60    pub boot_notifier: bool,
61
62    /// Whether to enable consent sync.
63    pub data_collection_consent_sync: bool,
64
65    /// Whether to boost CPU for a fixed duration.
66    pub boot_notifier_cpu_boost: Option<zx::MonotonicDuration>,
67
68    /// Whether to enable a framebuffer device.
69    pub framebuffer: bool,
70
71    /// Display aspect ratio.
72    pub aspect_ratio: Option<AspectRatio>,
73
74    /// This controls whether or not the default framebuffer background is black or colorful, to
75    /// aid debugging.
76    pub enable_visual_debugging: bool,
77
78    /// The value of the initial view ID annotation.
79    pub initial_view_id_annotation: String,
80
81    /// Whether to enable gralloc.
82    pub gralloc: bool,
83
84    /// Whether to enable the Kernel Graphics Support Layer (kgsl) device used by Adreno GPUs.
85    pub kgsl: bool,
86
87    /// Supported magma vendor IDs.
88    pub magma_supported_vendors: Option<Vec<u16>>,
89
90    /// Whether to enable gfxstream.
91    pub gfxstream: bool,
92
93    /// Include the /container directory in the root file system.
94    pub container: bool,
95
96    /// Include the /test_data directory in the root file system.
97    pub test_data: bool,
98
99    /// Include the /custom_artifacts directory in the root file system.
100    pub custom_artifacts: bool,
101
102    /// Whether to provide android with a serial number.
103    pub android_serialno: bool,
104
105    /// Optional perfetto configuration.
106    pub perfetto: Option<FsString>,
107
108    /// Whether to allow the root filesystem to be read/write.
109    pub rootfs_rw: bool,
110
111    /// Whether to enable network manager and its filesystem.
112    pub network_manager: bool,
113
114    /// Whether to enable the nanohub module.
115    pub nanohub: bool,
116
117    /// Whether to enable the fastrpc module.
118    pub fastrpc: bool,
119
120    pub enable_utc_time_adjustment: bool,
121
122    pub thermal: bool,
123
124    /// Optional cooling features to enable. See [`cooling_device_init`] for a list of possible
125    /// values and their parameters.
126    pub cooling: Option<Vec<String>>,
127
128    /// Whether to add android bootreason to kernel cmdline.
129    pub android_bootreason: bool,
130
131    pub hvdcp_opti: bool,
132
133    pub additional_mounts: Option<Vec<String>>,
134
135    /// Support kernel level suspend/resume tests.
136    pub wakeup_test: bool,
137
138    /// Add a stub block device entry for mmcblk0. This is required for certain containers that
139    /// query certain functionality based on block device naming.
140    pub mmcblk_stub: bool,
141
142    /// Whether to initialize Android-compatible USB monitoring sysfs logic.
143    pub android_usb: bool,
144}
145
146#[derive(Default, Debug, PartialEq)]
147pub struct SELinuxFeature {
148    /// True if SELinux should be enabled in the container.
149    pub enabled: bool,
150
151    /// Optional set of options to pass to the SELinux module.
152    pub options: String,
153
154    /// Optional set of access-check exceptions to pass to the SELinux module.
155    pub exceptions: Vec<String>,
156}
157
158impl Features {
159    pub fn record_inspect(&self, parent_node: &fuchsia_inspect::Node) {
160        parent_node.record_child("features", |inspect_node| match self {
161            Features {
162                kernel:
163                    KernelFeatures {
164                        bpf_v2,
165                        enable_suid,
166                        io_uring,
167                        error_on_failed_reboot,
168                        default_uid,
169                        default_seclabel,
170                        selinux_test_suite,
171                        default_ns_mount_options,
172                        mlock_always_onfault,
173                        mlock_pin_flavor,
174                        crash_report_throttling,
175                        wifi,
176                        cached_zx_map_info_bytes,
177                        dirent_cache_size,
178                        fake_ion,
179                    },
180                system_limits,
181                selinux,
182                ashmem,
183                boot_notifier,
184                boot_notifier_cpu_boost,
185                data_collection_consent_sync,
186                framebuffer,
187                aspect_ratio,
188                enable_visual_debugging,
189                gralloc,
190                kgsl,
191                magma_supported_vendors,
192                gfxstream,
193                container,
194                test_data,
195                custom_artifacts,
196                android_serialno,
197                perfetto,
198                rootfs_rw,
199                network_manager,
200                nanohub,
201                fastrpc,
202                enable_utc_time_adjustment,
203                thermal,
204                cooling,
205                android_bootreason,
206                hvdcp_opti,
207                additional_mounts,
208                wakeup_test,
209                mmcblk_stub,
210                android_usb,
211                initial_view_id_annotation,
212            } => {
213                inspect_node.record_bool("selinux", selinux.enabled);
214                inspect_node.record_bool("ashmem", *ashmem);
215                inspect_node.record_bool("boot_notifier", *boot_notifier);
216                inspect_node.record_string(
217                    "initial_view_id_annotation",
218                    initial_view_id_annotation.as_str(),
219                );
220                inspect_node
221                    .record_bool("data_collection_consent_sync", *data_collection_consent_sync);
222                inspect_node.record_string(
223                    "boot_notifier_cpu_boost",
224                    boot_notifier_cpu_boost
225                        .map(|d| format!("{}s", d.into_seconds()))
226                        .unwrap_or_else(|| "none".to_string()),
227                );
228                inspect_node.record_bool("framebuffer", *framebuffer);
229                inspect_node.record_bool("gralloc", *gralloc);
230                inspect_node.record_bool("kgsl", *kgsl);
231                inspect_node.record_string(
232                    "magma_supported_vendors",
233                    match magma_supported_vendors {
234                        Some(vendors) => vendors
235                            .iter()
236                            .map(|vendor| format!("0x{:x}", vendor))
237                            .collect::<Vec<String>>()
238                            .join(","),
239                        None => "".to_string(),
240                    },
241                );
242                inspect_node.record_bool("gfxstream", *gfxstream);
243                inspect_node.record_bool("container", *container);
244                inspect_node.record_bool("test_data", *test_data);
245                inspect_node.record_bool("custom_artifacts", *custom_artifacts);
246                inspect_node.record_bool("android_serialno", *android_serialno);
247                inspect_node.record_string(
248                    "aspect_ratio",
249                    aspect_ratio
250                        .as_ref()
251                        .map(|aspect_ratio| {
252                            format!("width: {} height: {}", aspect_ratio.width, aspect_ratio.height)
253                        })
254                        .unwrap_or_default(),
255                );
256                inspect_node.record_string(
257                    "perfetto",
258                    perfetto.as_ref().map(|p| p.to_string()).unwrap_or_default(),
259                );
260                inspect_node.record_bool("rootfs_rw", *rootfs_rw);
261                inspect_node.record_bool("network_manager", *network_manager);
262                inspect_node.record_bool("nanohub", *nanohub);
263                inspect_node.record_bool("fastrpc", *fastrpc);
264                inspect_node.record_bool("thermal", *thermal);
265                inspect_node.record_string(
266                    "cooling",
267                    match cooling {
268                        Some(devices) => devices.join(","),
269                        None => "".to_string(),
270                    },
271                );
272                inspect_node.record_bool("android_bootreason", *android_bootreason);
273                inspect_node.record_bool("hvdcp_opti", *hvdcp_opti);
274                inspect_node.record_string("ping_group_range", {
275                    let range = system_limits.socket.icmp_ping_gids.lock();
276                    std::format!("{},{}", range.start, range.end - 1)
277                });
278
279                inspect_node.record_child("kernel", |kernel_node| {
280                    kernel_node.record_bool("bpf_v2", *bpf_v2);
281                    kernel_node.record_bool("enable_suid", *enable_suid);
282                    kernel_node.record_bool("io_uring", *io_uring);
283                    kernel_node.record_bool("error_on_failed_reboot", *error_on_failed_reboot);
284                    kernel_node.record_bool("enable_visual_debugging", *enable_visual_debugging);
285                    kernel_node.record_int("default_uid", (*default_uid).into());
286                    kernel_node.record_string(
287                        "default_seclabel",
288                        default_seclabel.as_deref().unwrap_or_default(),
289                    );
290                    kernel_node.record_bool("selinux_test_suite", *selinux_test_suite);
291                    kernel_node.record_bool("crash_report_throttling", *crash_report_throttling);
292                    kernel_node
293                        .record_uint("cached_zx_map_info_bytes", *cached_zx_map_info_bytes as u64);
294                    inspect_node.record_string(
295                        "default_ns_mount_options",
296                        format!("{:?}", default_ns_mount_options),
297                    );
298                    inspect_node
299                        .record_bool("enable_utc_time_adjustment", *enable_utc_time_adjustment);
300                    inspect_node.record_bool("mlock_always_onfault", *mlock_always_onfault);
301                    inspect_node
302                        .record_string("mlock_pin_flavor", format!("{:?}", mlock_pin_flavor));
303                    inspect_node.record_bool("wifi", *wifi);
304                    inspect_node
305                        .record_string("additional_mounts", format!("{:?}", additional_mounts));
306                    inspect_node.record_uint("dirent_cache_size", *dirent_cache_size as u64);
307                    inspect_node.record_bool("wakeup_test", *wakeup_test);
308                    inspect_node.record_bool("mmcblk_stub", *mmcblk_stub);
309                    inspect_node.record_bool("android_usb", *android_usb);
310                    inspect_node.record_bool("fake_ion", *fake_ion);
311                });
312            }
313        });
314    }
315}
316
317/// Parses all the featurse in `entries`.
318///
319/// Returns an error if parsing fails, or if an unsupported feature is present in `features`.
320pub fn parse_features(
321    start_info: &ContainerStartInfo,
322    kernel_extra_features: &[String],
323) -> Result<Features, Error> {
324    let ContainerStructuredConfig {
325        crash_report_throttling,
326        enable_utc_time_adjustment,
327        extra_features,
328        cached_zx_map_info_bytes,
329        mlock_always_onfault,
330        mlock_pin_flavor,
331        selinux_exceptions,
332        ui_visual_debugging_level,
333        additional_mounts,
334        dirent_cache_size,
335        initial_view_id_annotation,
336    } = &start_info.config;
337
338    let mut features = Features::default();
339    for entry in start_info
340        .program
341        .features
342        .iter()
343        .chain(kernel_extra_features.iter())
344        .chain(extra_features.iter())
345    {
346        let (feature, raw_args) = Feature::try_parse_feature_and_args(entry)?;
347        match (feature, raw_args) {
348            (Feature::AndroidSerialno, _) => features.android_serialno = true,
349            (Feature::AndroidBootreason, _) => features.android_bootreason = true,
350            (Feature::AspectRatio, Some(args)) => {
351                let e = anyhow!("Invalid aspect_ratio: {:?}", args);
352                let components: Vec<_> = args.split(':').collect();
353                if components.len() != 2 {
354                    return Err(e);
355                }
356                let width: u32 =
357                    components[0].parse().map_err(|_| anyhow!("Invalid aspect ratio width"))?;
358                let height: u32 =
359                    components[1].parse().map_err(|_| anyhow!("Invalid aspect ratio height"))?;
360                features.aspect_ratio = Some(AspectRatio { width, height });
361            }
362            (Feature::AspectRatio, None) => {
363                return Err(anyhow!(
364                    "Aspect ratio feature must contain the aspect ratio in the format: aspect_ratio:w:h"
365                ));
366            }
367            (Feature::Container, _) => features.container = true,
368            (Feature::CustomArtifacts, _) => features.custom_artifacts = true,
369            (Feature::Ashmem, _) => features.ashmem = true,
370            (Feature::BootNotifier, _) => features.boot_notifier = true,
371            (Feature::DataCollectionConsentSync, _) => features.data_collection_consent_sync = true,
372            (Feature::BootNotifierCpuBoost, Some(arg)) => {
373                let duration = zx::MonotonicDuration::from_seconds(arg.parse::<i64>()?);
374                features.boot_notifier_cpu_boost = Some(duration);
375            }
376            (Feature::BootNotifierCpuBoost, None) => {
377                return Err(anyhow!(
378                    "boot_notifier_cpu_boost feature must have an argument (e.g. \"boot_notifier_cpu_boost:60\")"
379                ));
380            }
381            (Feature::Framebuffer, _) => features.framebuffer = true,
382            (Feature::Gralloc, _) => features.gralloc = true,
383            (Feature::Kgsl, _) => features.kgsl = true,
384            (Feature::Magma, _) => {
385                if features.magma_supported_vendors.is_none() {
386                    const VENDOR_ARM: u16 = 0x13B5;
387                    const VENDOR_INTEL: u16 = 0x8086;
388                    features.magma_supported_vendors = Some(vec![VENDOR_ARM, VENDOR_INTEL])
389                }
390            }
391            (Feature::MagmaSupportedVendors, Some(arg)) => {
392                features.magma_supported_vendors = Some(
393                    arg.split(',')
394                        .map(|s| {
395                            let err = anyhow!(
396                                "Feature format must be: magma_supported_vendors:0x1234[,0xabcd]"
397                            );
398                            let trimmed = s.trim_start_matches("0x");
399                            u16::from_str_radix(trimmed, 16).map_err(|_| err)
400                        })
401                        .collect::<Result<Vec<u16>, Error>>()?,
402                );
403            }
404            (Feature::MagmaSupportedVendors, None) => {
405                return Err(anyhow!(
406                    "Feature format must be: magma_supported_vendors:0x1234[,0xabcd]"
407                ));
408            }
409            (Feature::Nanohub, _) => features.nanohub = true,
410            (Feature::Fastrpc, _) => features.fastrpc = true,
411            (Feature::NetworkManager, _) => features.network_manager = true,
412            (Feature::Gfxstream, _) => features.gfxstream = true,
413            (Feature::Bpf, Some(version)) => features.kernel.bpf_v2 = version == "v2",
414            (Feature::Bpf, None) => {
415                return Err(anyhow!("bpf feature must have an argument (e.g. \"bpf:v2\")"));
416            }
417            (Feature::EnableSuid, _) => features.kernel.enable_suid = true,
418            (Feature::IoUring, _) => features.kernel.io_uring = true,
419            (Feature::ErrorOnFailedReboot, _) => features.kernel.error_on_failed_reboot = true,
420            (Feature::Perfetto, Some(socket_path)) => {
421                features.perfetto = Some(socket_path.into());
422            }
423            (Feature::Perfetto, None) => {
424                return Err(anyhow!("Perfetto feature must contain a socket path"));
425            }
426            (Feature::PingGroupRange, Some(arg)) => {
427                let mut args = arg.split(',');
428                let (min, max) = (|| {
429                    let min = args.next()?.trim_ascii().parse::<u32>().ok()?;
430                    let max = args.next()?.trim_ascii().parse::<u32>().ok()?.checked_add(1)?;
431                    if args.next().is_some() {
432                        return None;
433                    }
434                    Some((min, max))
435                })()
436                .ok_or_else(|| anyhow!("Feature format must be: ping_group_range:0,100"))?;
437                *features.system_limits.socket.icmp_ping_gids.lock() = min..max;
438            }
439            (Feature::PingGroupRange, None) => {
440                return Err(anyhow!("Feature format must be: ping_group_range:0,100"));
441            }
442            (Feature::RootfsRw, _) => features.rootfs_rw = true,
443            (Feature::Selinux, arg) => {
444                features.selinux = SELinuxFeature {
445                    enabled: true,
446                    options: arg.unwrap_or_default(),
447                    exceptions: selinux_exceptions.clone(),
448                };
449            }
450            (Feature::SelinuxTestSuite, _) => features.kernel.selinux_test_suite = true,
451            (Feature::TestData, _) => features.test_data = true,
452            (Feature::Thermal, _) => features.thermal = true,
453            (Feature::Cooling, Some(arg)) => {
454                features.cooling = Some(arg.split(',').map(String::from).collect::<Vec<String>>())
455            }
456            (Feature::Cooling, None) => {
457                return Err(anyhow!("cooling feature must have an argument"));
458            }
459            (Feature::HvdcpOpti, _) => features.hvdcp_opti = true,
460            (Feature::Wifi, _) => features.kernel.wifi = true,
461            (Feature::AdditionalMounts, _) => {
462                features.additional_mounts = Some(additional_mounts.clone())
463            }
464            (Feature::WakeupTest, _) => features.wakeup_test = true,
465            (Feature::MmcblkStub, _) => features.mmcblk_stub = true,
466            (Feature::FakeIon, _) => features.kernel.fake_ion = true,
467            (Feature::AndroidUsb, _) => features.android_usb = true,
468        };
469    }
470
471    if features.boot_notifier_cpu_boost.is_some() && !features.boot_notifier {
472        return Err(anyhow!("boot_notifier_cpu_boost feature requires boot_notifier"));
473    }
474
475    if *ui_visual_debugging_level > 0 {
476        features.enable_visual_debugging = true;
477    }
478    features.enable_utc_time_adjustment = *enable_utc_time_adjustment;
479
480    features.kernel.default_uid = start_info.program.default_uid.0;
481    features.kernel.default_seclabel = start_info.program.default_seclabel.clone();
482    features.kernel.default_ns_mount_options =
483        if let Some(mount_options) = &start_info.program.default_ns_mount_options {
484            let options = mount_options
485                .iter()
486                .map(|item| {
487                    let mut splitter = item.splitn(2, ":");
488                    let key = splitter.next().expect("Failed to parse mount options");
489                    let value = splitter.next().expect("Failed to parse mount options");
490                    (key.to_string(), value.to_string())
491                })
492                .collect();
493            Some(options)
494        } else {
495            None
496        };
497
498    features.kernel.mlock_always_onfault = *mlock_always_onfault;
499    features.kernel.mlock_pin_flavor = MlockPinFlavor::parse(mlock_pin_flavor.as_str())?;
500    features.kernel.crash_report_throttling = *crash_report_throttling;
501    features.kernel.cached_zx_map_info_bytes = *cached_zx_map_info_bytes;
502    features.kernel.dirent_cache_size = *dirent_cache_size;
503    features.initial_view_id_annotation = initial_view_id_annotation.clone();
504
505    Ok(features)
506}
507
508/// Runs all the features that are enabled in `system_task.kernel()`.
509
510pub fn run_container_features(
511    locked: &mut Locked<Unlocked>,
512    system_task: &CurrentTask,
513    features: &Features,
514) -> Result<(), Error> {
515    let kernel = system_task.kernel();
516
517    if features.framebuffer {
518        let framebuffer = Framebuffer::device_init(
519            locked,
520            system_task,
521            features.aspect_ratio,
522            features.enable_visual_debugging,
523            features.initial_view_id_annotation.clone(),
524        )
525        .context("initializing framebuffer")?;
526
527        let (touch_source_client, touch_source_server) = fidl::endpoints::create_endpoints();
528        let (mouse_source_client, mouse_source_server) = fidl::endpoints::create_endpoints();
529        let view_bound_protocols = fuicomposition::ViewBoundProtocols {
530            touch_source: Some(touch_source_server),
531            mouse_source: Some(mouse_source_server),
532            ..Default::default()
533        };
534        let view_identity = fuiviews::ViewIdentityOnCreation::from(
535            fuchsia_scenic::ViewRefPair::new().expect("Failed to create ViewRefPair"),
536        );
537        let view_ref = fuchsia_scenic::duplicate_view_ref(&view_identity.view_ref)
538            .expect("Failed to dup view ref.");
539        let keyboard =
540            fuchsia_component::client::connect_to_protocol_sync::<fuiinput::KeyboardMarker>()
541                .expect("Failed to connect to keyboard");
542        let registry_proxy = fuchsia_component::client::connect_to_protocol_sync::<
543            fuipolicy::DeviceListenerRegistryMarker,
544        >()
545        .expect("Failed to connect to device listener registry");
546
547        // These need to be set before `Framebuffer::start_server` is called.
548        // `Framebuffer::start_server` is only called when the `framebuffer` component feature is
549        // enabled. The container is the runner for said components, and `run_container_features`
550        // is performed before the Container is fully initialized. Therefore, it's safe to set
551        // these values at this point.
552        //
553        // In the future, we would like to avoid initializing a framebuffer unconditionally on the
554        // Kernel, at which point this logic will need to change.
555        *framebuffer.view_identity.lock() = Some(view_identity);
556        *framebuffer.view_bound_protocols.lock() = Some(view_bound_protocols);
557
558        let framebuffer_info = framebuffer.info.read();
559
560        let display_width = framebuffer_info.xres as i32;
561        let display_height = framebuffer_info.yres as i32;
562
563        let touch_device =
564            InputDevice::new_touch(display_width, display_height, &kernel.inspect_node);
565        let keyboard_device = InputDevice::new_keyboard(&kernel.inspect_node);
566        let mouse_device = InputDevice::new_mouse(&kernel.inspect_node);
567
568        touch_device.clone().register(
569            locked,
570            &kernel.kthreads.system_task(),
571            DEFAULT_TOUCH_DEVICE_ID,
572        )?;
573        keyboard_device.clone().register(
574            locked,
575            &kernel.kthreads.system_task(),
576            DEFAULT_KEYBOARD_DEVICE_ID,
577        )?;
578        mouse_device.clone().register(
579            locked,
580            &kernel.kthreads.system_task(),
581            DEFAULT_MOUSE_DEVICE_ID,
582        )?;
583
584        let (input_events_relay, input_events_relay_handle) = new_input_relay();
585        input_events_relay.start_relays(
586            &kernel,
587            EventProxyMode::WakeContainer,
588            touch_source_client,
589            keyboard,
590            mouse_source_client,
591            view_ref,
592            registry_proxy,
593            touch_device.open_files.clone(),
594            keyboard_device.open_files.clone(),
595            mouse_device.open_files.clone(),
596            Some(touch_device.inspect_status),
597            Some(keyboard_device.inspect_status),
598            Some(mouse_device.inspect_status),
599        );
600
601        register_uinput_device(locked, &kernel.kthreads.system_task(), input_events_relay_handle)?;
602
603        // Channel we use to inform the relay of changes to `touch_standby`
604        let (touch_standby_sender, touch_standby_receiver) =
605            ThreadLockupDetector::tracked_channel::<bool>();
606        let touch_policy_device = TouchPowerPolicyDevice::new(touch_standby_sender);
607        touch_policy_device.clone().register(locked, &kernel.kthreads.system_task());
608        touch_policy_device.start_relay(&kernel, touch_standby_receiver);
609
610        framebuffer.start_server(kernel, None);
611    }
612    if features.gralloc {
613        // The virtgralloc0 device allows vulkan_selector to indicate to gralloc
614        // whether swiftshader or magma will be used. This is separate from the
615        // magma feature because the policy choice whether to use magma or
616        // swiftshader is in vulkan_selector, and it can potentially choose
617        // switfshader for testing purposes even when magma0 is present. Also,
618        // it's nice to indicate swiftshader the same way regardless of whether
619        // the magma feature is enabled or disabled. If a call to gralloc AIDL
620        // IAllocator allocate2 occurs with this feature disabled, the call will
621        // fail.
622        gralloc_device_init(locked, system_task);
623    }
624    if features.kgsl {
625        kgsl_device_init(locked, system_task);
626    }
627    if let Some(supported_vendors) = &features.magma_supported_vendors {
628        magma_device_init(locked, system_task, supported_vendors.clone());
629    }
630    if features.gfxstream {
631        gpu_device_init(locked, system_task);
632    }
633    if let Some(socket_path) = features.perfetto.clone() {
634        start_perfetto_consumer_thread(kernel, socket_path)
635            .context("Failed to start perfetto consumer thread")?;
636    }
637    if features.ashmem {
638        ashmem_device_init(locked, system_task);
639    }
640    if features.boot_notifier {
641        booted_device_init(locked, system_task, features.boot_notifier_cpu_boost);
642    }
643    if features.data_collection_consent_sync {
644        consent_sync_init(locked, system_task);
645    }
646    if features.network_manager {
647        if let Err(e) = nmfs_init(system_task) {
648            log_error!("Network manager initialization failed: ({e:?})");
649        }
650    }
651    if features.nanohub {
652        nanohub_device_init(locked, system_task);
653    }
654    if features.thermal {
655        thermal_device_init(locked, kernel)?;
656    }
657    if let Some(devices) = &features.cooling {
658        cooling_device_init(locked, kernel, devices.clone())?;
659    }
660    if features.hvdcp_opti {
661        hvdcp_opti_init(locked, system_task)?;
662    }
663    if features.fastrpc {
664        fastrpc_device_init(locked, system_task);
665    }
666    if features.wakeup_test {
667        register_wakeup_test_device(locked, system_task)?;
668    }
669    if features.mmcblk_stub {
670        let _device = add_mmc_block_device(locked, system_task)
671            .context("Failed to add stub mmcblk0 device")?;
672    }
673    if features.android_usb {
674        usb_device_init(locked, system_task).context("Failed to add android usb device nodes")?;
675    }
676    Ok(())
677}
678
679/// Runs features requested by individual components inside the container.
680pub fn run_component_features(
681    kernel: &Kernel,
682    entries: &Vec<String>,
683    mut incoming_dir: Option<fidl_fuchsia_io::DirectoryProxy>,
684) -> Result<(), Errno> {
685    for entry in entries {
686        match entry.as_str() {
687            "framebuffer" => {
688                Framebuffer::get(kernel)?.start_server(kernel, incoming_dir.take());
689            }
690            feature => {
691                return error!(ENOSYS, format!("Unsupported feature: {}", feature));
692            }
693        }
694    }
695    Ok(())
696}
starnix_kernel_runner/features.rs

starnix_kernel_runner/
features.rs
