xnu-7195.50.7.100.1.tar.gz

[apple/xnu.git] / iokit / Kernel / IOStartIOKit.cpp

diff --git a/iokit/Kernel/IOStartIOKit.cpp b/iokit/Kernel/IOStartIOKit.cpp
index 196e91086139d4da7b43ccfb05fa2376db96ff4c..c022807f2129a647e46335704fa90bfc60e52975 100644 (file)
--- a/iokit/Kernel/IOStartIOKit.cpp
+++ b/iokit/Kernel/IOStartIOKit.cpp
@@ -28,6 +28,7 @@
 
 #include <libkern/c++/OSUnserialize.h>
 #include <libkern/c++/OSKext.h>
+#include <libkern/section_keywords.h>
 #include <libkern/version.h>
 #include <IOKit/IORegistryEntry.h>
 #include <IOKit/IODeviceTreeSupport.h>
@@ -35,6 +36,7 @@
 #include <IOKit/IOUserClient.h>
 #include <IOKit/IOMemoryDescriptor.h>
 #include <IOKit/IOPlatformExpert.h>
+#include <IOKit/IOKernelReporters.h>
 #include <IOKit/IOLib.h>
 #include <IOKit/IOKitKeys.h>
 #include <IOKit/IOKitDebug.h>
@@ -52,7 +54,9 @@ const OSSymbol * gIOProgressBackbufferKey;
 OSSet *          gIORemoveOnReadProperties;
 
 extern "C" {
-void StartIOKit( void * p1, void * p2, void * p3, void * p4 );
+void InitIOKit(void *dtTop);
+void ConfigureIOKit(void);
+void StartIOKitMatching(void);
 void IORegistrySetOSBuildVersion(char * build_version);
 void IORecordProgressBackbuffer(void * buffer, size_t size, uint32_t theme);
 
@@ -60,6 +64,8 @@ extern void OSlibkernInit(void);
 
 void iokit_post_constructor_init(void);
 
+SECURITY_READ_ONLY_LATE(static IOPlatformExpertDevice*) gRootNub;
+
 #include <kern/clock.h>
 #include <sys/time.h>
 
@@ -70,8 +76,12 @@ IOKitInitializeTime( void )
 
        t.tv_sec = 30;
        t.tv_nsec = 0;
+
+// RTC is not present on this target
+#ifndef BCM2837
        IOService::waitForService(
                IOService::resourceMatching("IORTC"), &t );
+#endif
 #if defined(__i386__) || defined(__x86_64__)
        IOService::waitForService(
                IOService::resourceMatching("IONVRAM"), &t );
@@ -87,6 +97,7 @@ iokit_post_constructor_init(void)
        OSObject *                  obj;
 
        IOCPUInitialize();
+       IOPlatformActionsInitialize();
        root = IORegistryEntry::initialize();
        assert( root );
        IOService::initialize();
@@ -96,6 +107,7 @@ iokit_post_constructor_init(void)
        IOUserClient::initialize();
        IOMemoryDescriptor::initialize();
        IORootParent::initialize();
+       IOReporter::initialize();
 
        // Initializes IOPMinformeeList class-wide shared lock
        IOPMinformeeList::getSharedRecursiveLock();
@@ -116,22 +128,24 @@ iokit_post_constructor_init(void)
 /*****
  * Pointer into bootstrap KLD segment for functions never used past startup.
  */
-void (*record_startup_extensions_function)(void) = 0;
+void (*record_startup_extensions_function)(void) = NULL;
 
 void
-StartIOKit( void * p1, void * p2, void * p3, void * p4 )
+InitIOKit(void *dtTop)
 {
-       IOPlatformExpertDevice *    rootNub;
-       int                         debugFlags;
+       int                         debugFlags = 0;
 
        if (PE_parse_boot_argn( "io", &debugFlags, sizeof(debugFlags))) {
                gIOKitDebug = debugFlags;
        }
-#if DEVELOPMENT || DEBUG
+       // Enable IOWaitQuiet panics on arm64 macOS except on KASAN.
+       // existing 3rd party KEXTs may hold the registry busy on x86 RELEASE kernels.
+       // Enabling this on other platforms is tracked in rdar://66364108
+#if XNU_TARGET_OS_OSX && defined(__arm64__) && !KASAN
        else {
                gIOKitDebug |= kIOWaitQuietPanics;
        }
-#endif /* DEVELOPMENT || DEBUG */
+#endif
 
        if (PE_parse_boot_argn( "iotrace", &debugFlags, sizeof(debugFlags))) {
                gIOKitTrace = debugFlags;
@@ -143,6 +157,12 @@ StartIOKit( void * p1, void * p2, void * p3, void * p4 )
        if (PE_parse_boot_argn( "pmtimeout", &debugFlags, sizeof(debugFlags))) {
                gCanSleepTimeout = debugFlags;
        }
+
+       if (PE_parse_boot_argn( "dk", &debugFlags, sizeof(debugFlags))) {
+               gIODKDebug = debugFlags;
+       }
+
+
        //
        // Have to start IOKit environment before we attempt to start
        // the C++ runtime environment.  At some stage we have to clean up
@@ -152,6 +172,7 @@ StartIOKit( void * p1, void * p2, void * p3, void * p4 )
        //
        IOLibInit();
        OSlibkernInit();
+       IOMachPortInitialize();
        devsw_init();
 
        gIOProgressBackbufferKey  = OSSymbol::withCStringNoCopy(kIOProgressBackbufferKey);
@@ -159,29 +180,48 @@ StartIOKit( void * p1, void * p2, void * p3, void * p4 )
 
        interruptAccountingInit();
 
-       rootNub = new IOPlatformExpertDevice;
+       gRootNub = new IOPlatformExpertDevice;
+       if (__improbable(gRootNub == NULL)) {
+               panic("Failed to allocate IOKit root nub");
+       }
+       bool ok = gRootNub->init(dtTop);
+       if (__improbable(!ok)) {
+               panic("Failed to initialize IOKit root nub");
+       }
+       gRootNub->attach(NULL);
 
-       if (rootNub && rootNub->initWithArgs( p1, p2, p3, p4)) {
-               rootNub->attach( 0 );
+       /* If the bootstrap segment set up a function to record startup
+        * extensions, call it now.
+        */
+       if (record_startup_extensions_function) {
+               record_startup_extensions_function();
+       }
+}
 
-               /* If the bootstrap segment set up a function to record startup
-                * extensions, call it now.
-                */
-               if (record_startup_extensions_function) {
-                       record_startup_extensions_function();
-               }
+void
+ConfigureIOKit(void)
+{
+       assert(gRootNub != NULL);
+       gRootNub->configureDefaults();
+}
 
-               rootNub->registerService();
+void
+StartIOKitMatching(void)
+{
+       assert(gRootNub != NULL);
+       bool ok = gRootNub->startIOServiceMatching();
+       if (__improbable(!ok)) {
+               panic("Failed to start IOService matching");
+       }
 
 #if !NO_KEXTD
-               /* Add a busy count to keep the registry busy until kextd has
-                * completely finished launching. This is decremented when kextd
-                * messages the kernel after the in-kernel linker has been
-                * removed and personalities have been sent.
-                */
-               IOService::getServiceRoot()->adjustBusy(1);
+       /* Add a busy count to keep the registry busy until kextd has
+        * completely finished launching. This is decremented when kextd
+        * messages the kernel after the in-kernel linker has been
+        * removed and personalities have been sent.
+        */
+       IOService::getServiceRoot()->adjustBusy(1);
 #endif
-       }
 }
 
 void
@@ -204,8 +244,12 @@ void
 IORecordProgressBackbuffer(void * buffer, size_t size, uint32_t theme)
 {
        IORegistryEntry * chosen;
+
+       if (((unsigned int) size) != size) {
+               return;
+       }
        if ((chosen = IORegistryEntry::fromPath(kIODeviceTreePlane ":/chosen"))) {
-               chosen->setProperty(kIOProgressBackbufferKey, buffer, size);
+               chosen->setProperty(kIOProgressBackbufferKey, buffer, (unsigned int) size);
                chosen->setProperty(kIOProgressColorThemeKey, theme, 32);
 
                chosen->release();