]> git.saurik.com Git - apple/xnu.git/blobdiff - osfmk/kern/startup.c
xnu-4570.71.2.tar.gz
[apple/xnu.git] / osfmk / kern / startup.c
index 8c3b99f0943997b7f864b1a8712a7561c116340a..c9cfd5167356d5a3f007e7b60ce31dbcf598c865 100644 (file)
 #include <kern/waitq.h>
 #include <ipc/ipc_voucher.h>
 #include <voucher/ipc_pthread_priority_internal.h>
+#include <mach/host_info.h>
 
 
 #if CONFIG_ATM
 #include <sys/csr.h>
 #endif
 
-#if CONFIG_BANK
 #include <bank/bank_internal.h>
-#endif
 
 #if ALTERNATE_DEBUGGER
 #include <arm64/alternate_debugger.h>
 
 #if CONFIG_MACF
 #include <security/mac_mach_internal.h>
+#if CONFIG_VNGUARD
+extern void vnguard_policy_init(void);
+#endif
 #endif
 
 #if KPC
 #include <kern/hv_support.h>
 #endif
 
+#include <san/kasan.h>
+
+#if defined(__arm__) || defined(__arm64__)
+#include <arm/misc_protos.h> // for arm_vm_prot_finalize
+#endif
 
 #include <i386/pmCPU.h>
 static void            kernel_bootstrap_thread(void);
@@ -196,8 +203,9 @@ unsigned int new_nkdbufs = 0;
 unsigned int wake_nkdbufs = 0;
 unsigned int write_trace_on_panic = 0;
 static char trace_typefilter[64] = { 0 };
+unsigned int trace_wrap = 0;
 boolean_t trace_serial = FALSE;
-boolean_t oslog_early_boot_complete = FALSE;
+boolean_t early_boot_complete = FALSE;
 
 /* mach leak logging */
 int log_leaks = 0;
@@ -258,6 +266,7 @@ kernel_bootstrap(void)
        PE_parse_boot_argn("trace_wake", &wake_nkdbufs, sizeof (wake_nkdbufs));
        PE_parse_boot_argn("trace_panic", &write_trace_on_panic, sizeof(write_trace_on_panic));
        PE_parse_boot_arg_str("trace_typefilter", trace_typefilter, sizeof(trace_typefilter));
+       PE_parse_boot_argn("trace_wrap", &trace_wrap, sizeof(trace_wrap));
 
        scale_setup();
 
@@ -277,6 +286,11 @@ kernel_bootstrap(void)
 
        oslog_init();
 
+#if KASAN
+       kernel_bootstrap_log("kasan_late_init");
+       kasan_late_init();
+#endif
+
 #if CONFIG_TELEMETRY
        kernel_bootstrap_log("telemetry_init");
        telemetry_init();
@@ -339,6 +353,7 @@ kernel_bootstrap(void)
        /*
         *      Initialize the IPC, task, and thread subsystems.
         */
+
 #if CONFIG_COALITIONS
        kernel_bootstrap_log("coalitions_init");
        coalitions_init();
@@ -358,11 +373,9 @@ kernel_bootstrap(void)
        kernel_bootstrap_log("mach_init_activity_id");
        mach_init_activity_id();
 
-#if CONFIG_BANK
        /* Initialize the BANK Manager. */
        kernel_bootstrap_log("bank_init");
        bank_init();
-#endif
 
        kernel_bootstrap_log("ipc_pthread_priority_init");
        ipc_pthread_priority_init();
@@ -370,6 +383,9 @@ kernel_bootstrap(void)
        /* initialize the corpse config based on boot-args */
        corpses_init();
 
+       /* initialize host_statistics */
+       host_statistics_init();
+
        /*
         *      Create a kernel thread to execute the kernel bootstrap.
         */
@@ -392,6 +408,8 @@ int kth_started = 0;
 vm_offset_t vm_kernel_addrperm;
 vm_offset_t buf_kernel_addrperm;
 vm_offset_t vm_kernel_addrperm_ext;
+uint64_t vm_kernel_addrhash_salt;
+uint64_t vm_kernel_addrhash_salt_ext;
 
 /*
  * Now running in a thread.  Kick off other services,
@@ -440,6 +458,11 @@ kernel_bootstrap_thread(void)
        kernel_bootstrap_thread_log("thread_bind");
        thread_bind(processor);
 
+#if __arm64__
+       if (IORamDiskBSDRoot()) {
+               cpm_preallocate_early();
+       }
+#endif /* __arm64__ */
 
        /*
         * Initialize ipc thread call support.
@@ -509,9 +532,7 @@ kernel_bootstrap_thread(void)
        kernel_bootstrap_thread_log("ktrace_init");
        ktrace_init();
 
-       if (new_nkdbufs > 0 || kdebug_serial || log_leaks) {
-               kdebug_boot_trace(new_nkdbufs, trace_typefilter);
-       }
+       kdebug_init(new_nkdbufs, trace_typefilter, trace_wrap);
 
        kernel_bootstrap_log("prng_init");
        prng_cpu_init(master_cpu);
@@ -521,6 +542,10 @@ kernel_bootstrap_thread(void)
        bsd_early_init();
 #endif
 
+#if defined(__arm64__)
+    ml_lockdown_init();
+#endif
+
 #ifdef IOKIT
        kernel_bootstrap_log("PE_init_iokit");
        PE_init_iokit();
@@ -528,10 +553,16 @@ kernel_bootstrap_thread(void)
 
        assert(ml_get_interrupts_enabled() == FALSE);
 
-       // Set this flag to indicate that it is now okay to start testing
-       // for interrupts / preemeption disabled while logging
-       oslog_early_boot_complete = TRUE;
+       /*
+        * Past this point, kernel subsystems that expect to operate with
+        * interrupts or preemption enabled may begin enforcement.
+        */
+       early_boot_complete = TRUE;
 
+#if INTERRUPT_MASKED_DEBUG
+       // Reset interrupts masked timeout before we enable interrupts
+       ml_spin_debug_clear_self();
+#endif
        (void) spllo();         /* Allow interruptions */
 
 #if (defined(__i386__) || defined(__x86_64__)) && NCOPY_WINDOWS > 0
@@ -555,8 +586,20 @@ kernel_bootstrap_thread(void)
 #if CONFIG_MACF
        kernel_bootstrap_log("mac_policy_initmach");
        mac_policy_initmach();
+#if CONFIG_VNGUARD
+       vnguard_policy_init();
+#endif
 #endif
 
+#if defined(__arm__) || defined(__arm64__)
+#if CONFIG_KERNEL_INTEGRITY
+        machine_lockdown_preflight();
+#endif
+       /*
+        *  Finalize protections on statically mapped pages now that comm page mapping is established.
+        */
+       arm_vm_prot_finalize(PE_state.bootArgs); 
+#endif
 
 #if CONFIG_SCHED_SFI
        kernel_bootstrap_log("sfi_init");
@@ -578,11 +621,14 @@ kernel_bootstrap_thread(void)
        buf_kernel_addrperm |= 1;
        read_random(&vm_kernel_addrperm_ext, sizeof(vm_kernel_addrperm_ext));
        vm_kernel_addrperm_ext |= 1;
+       read_random(&vm_kernel_addrhash_salt, sizeof(vm_kernel_addrhash_salt));
+       read_random(&vm_kernel_addrhash_salt_ext, sizeof(vm_kernel_addrhash_salt_ext));
 
        vm_set_restrictions();
 
 
 
+
        /*
         *      Start the user bootstrap.
         */
@@ -596,6 +642,11 @@ kernel_bootstrap_thread(void)
      */
        OSKextRemoveKextBootstrap();
 
+       /*
+        * Get rid of pages used for early boot tracing.
+        */
+       kdebug_free_early_buf();
+
        serial_keyboard_init();         /* Start serial keyboard if wanted */
 
        vm_page_init_local_q();
@@ -669,7 +720,7 @@ processor_start_thread(void *machine_param)
  *
  *     Start the first thread on a processor.
  */
-static void
+static void __attribute__((noreturn))
 load_context(
        thread_t                thread)
 {
@@ -707,11 +758,9 @@ load_context(
                sched_run_incr(thread);
 
        processor->active_thread = thread;
-       processor->current_pri = thread->sched_pri;
-       processor->current_thmode = thread->sched_mode;
-       processor->current_sfi_class = SFI_CLASS_KERNEL;
+       processor_state_update_explicit(processor, thread->sched_pri, 
+               SFI_CLASS_KERNEL, PSET_SMP, thread_get_perfcontrol_class(thread));
        processor->starting_pri = thread->sched_pri;
-
        processor->deadline = UINT64_MAX;
        thread->last_processor = processor;
 
@@ -722,6 +771,7 @@ load_context(
        timer_start(&PROCESSOR_DATA(processor, system_state), processor->last_dispatch);
        PROCESSOR_DATA(processor, current_state) = &PROCESSOR_DATA(processor, system_state);
 
+
        PMAP_ACTIVATE_USER(thread, processor->cpu_id);
 
        load_context_kprintf("machine_load_context\n");
@@ -743,8 +793,15 @@ scale_setup()
                if (scale > 16)
                        scale = 16;
                task_max_base = 2500;
-       } else if ((uint64_t)sane_size >= (uint64_t)(3 * 1024 * 1024 *1024ULL))
-               scale = 2;
+       /* Raise limits for machines with >= 3GB */
+       } else if ((uint64_t)sane_size >= (uint64_t)(3 * 1024 * 1024 *1024ULL)) {
+               if ((uint64_t)sane_size < (uint64_t)(8 * 1024 * 1024 *1024ULL)) {
+                       scale = 2;
+               } else {
+                       /* limit to 64GB */
+                       scale = MIN(16, (int)((uint64_t)sane_size / (uint64_t)(4 * 1024 * 1024 *1024ULL)));
+               }
+       }
 
        task_max = MAX(task_max, task_max_base * scale);