Kernel/CommandLine: Add option to disable physical networking hardware

This is useful for debugging sessions mostly.
fleximus · Jun 9, 2021 · 2e2201e · 2e2201e
1 parent 1c94b5e
commit 2e2201e
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Showing 3 changed files with 15 additions and 7 deletions.
diff --git a/Kernel/CommandLine.cpp b/Kernel/CommandLine.cpp
@@ -154,6 +154,11 @@ UNMAP_AFTER_INIT HPETMode CommandLine::hpet_mode() const
  PANIC("Unknown HPETMode: {}", hpet_mode);
 }
 
+UNMAP_AFTER_INIT bool CommandLine::is_physical_networking_disabled() const
+{
+ return contains("disable_physical_networking"sv);
+}
+
 UNMAP_AFTER_INIT bool CommandLine::disable_ps2_controller() const
 {
  return contains("disable_ps2_controller"sv);

diff --git a/Kernel/CommandLine.h b/Kernel/CommandLine.h
@@ -55,6 +55,7 @@ class CommandLine {
  [[nodiscard]] bool is_boot_profiling_enabled() const;
  [[nodiscard]] bool is_ide_enabled() const;
  [[nodiscard]] bool is_smp_enabled() const;
+ [[nodiscard]] bool is_physical_networking_disabled() const;
  [[nodiscard]] bool is_vmmouse_enabled() const;
  [[nodiscard]] PCIAccessLevel pci_access_level() const;
  [[nodiscard]] bool is_legacy_time_enabled() const;

diff --git a/Kernel/Net/NetworkingManagement.cpp b/Kernel/Net/NetworkingManagement.cpp
@@ -85,13 +85,15 @@ UNMAP_AFTER_INIT RefPtr<NetworkAdapter> NetworkingManagement::determine_network_
 
 bool NetworkingManagement::initialize()
 {
- PCI::enumerate([&](const PCI::Address& address, PCI::ID) {
- // Note: PCI class 2 is the class of Network devices
- if (PCI::get_class(address) != 0x02)
- return;
- if (auto adapter = determine_network_device(address); !adapter.is_null())
- m_adapters.append(adapter.release_nonnull());
- });
+ if (!kernel_command_line().is_physical_networking_disabled()) {
+ PCI::enumerate([&](const PCI::Address& address, PCI::ID) {
+ // Note: PCI class 2 is the class of Network devices
+ if (PCI::get_class(address) != 0x02)
+ return;
+ if (auto adapter = determine_network_device(address); !adapter.is_null())
+ m_adapters.append(adapter.release_nonnull());
+ });
+ }
  auto loopback = LoopbackAdapter::create();
  m_adapters.append(loopback);
  m_loopback_adapter = loopback;