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init: Support for initializing virtio-console devices

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This change allows init to ensure that a specified virtio-console
device file (`/dev/hvc*`) is available before `ueventd` coldboot.
Times out if device path is not encountered within 10 seconds.

Bug: 325538592
Test: build bertha_x86_64 and bertha_arm64
Change-Id: Ia1512e69ea607bf4d235595caa53668e2dac500c
This commit is contained in:
Tiffany Yang 2024-05-21 16:43:35 -07:00
parent 60d8d17fbc
commit 0fb39f6e69
2 changed files with 5 additions and 0 deletions
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4
init/block_dev_initializer.cpp
View file

@ -139,6 +139,10 @@ bool BlockDevInitializer::InitPlatformDevice(const std::string& dev_name) {
return InitDevice("/sys/devices/platform", dev_name);
}
bool BlockDevInitializer::InitHvcDevice(const std::string& dev_name) {
return InitDevice("/sys/devices/virtual/tty", dev_name);
}
bool BlockDevInitializer::InitDevice(const std::string& syspath, const std::string& device_name) {
bool found = false;

1
init/block_dev_initializer.h
View file

@ -34,6 +34,7 @@ class BlockDevInitializer final {
bool InitDevices(std::set<std::string> devices);
bool InitDmDevice(const std::string& device);
bool InitPlatformDevice(const std::string& device);
bool InitHvcDevice(const std::string& device);
private:
ListenerAction HandleUevent(const Uevent& uevent, std::set<std::string>* devices);