xnu-2782.20.48.tar.gz

[apple/xnu.git] / osfmk / i386 / machine_routines.c

diff --git a/osfmk/i386/machine_routines.c b/osfmk/i386/machine_routines.c
index d958d8c2e0016ae3cd62151d09be389474fdcd7e..85999aef6c4ff0378961dc2bedc7af6897095fd7 100644 (file)
--- a/osfmk/i386/machine_routines.c
+++ b/osfmk/i386/machine_routines.c
@@ -37,9 +37,10 @@
 #include <kern/cpu_number.h>
 #include <kern/thread.h>
 #include <kern/thread_call.h>
+#include <prng/random.h>
 #include <i386/machine_cpu.h>
 #include <i386/lapic.h>
-#include <i386/lock.h>
+#include <i386/bit_routines.h>
 #include <i386/mp_events.h>
 #include <i386/pmCPU.h>
 #include <i386/trap.h>
@@ -54,6 +55,7 @@
 #if KPC
 #include <kern/kpc.h>
 #endif
+#include <architecture/i386/pio.h>
 
 #if DEBUG
 #define DBG(x...)      kprintf("DBG: " x)
@@ -66,6 +68,7 @@ extern void   wakeup(void *);
 static int max_cpus_initialized = 0;
 
 unsigned int   LockTimeOut;
+unsigned int   TLBTimeOut;
 unsigned int   LockTimeOutTSC;
 unsigned int   MutexSpin;
 uint64_t       LastDebuggerEntryAllowance;
@@ -277,7 +280,7 @@ boolean_t ml_set_interrupts_enabled(boolean_t enable)
                __asm__ volatile("sti;nop");
 
                if ((get_preemption_level() == 0) && (*ast_pending() & AST_URGENT))
-                       __asm__ volatile ("int $0xff");
+                       __asm__ volatile ("int %0" :: "N" (T_PREEMPT));
        }
        else {
                if (istate)
@@ -308,20 +311,25 @@ void ml_cause_interrupt(void)
        panic("ml_cause_interrupt not defined yet on Intel");
 }
 
+/*
+ * TODO: transition users of this to kernel_thread_start_priority
+ * ml_thread_policy is an unsupported KPI
+ */
 void ml_thread_policy(
        thread_t thread,
 __unused       unsigned policy_id,
        unsigned policy_info)
 {
        if (policy_info & MACHINE_NETWORK_WORKLOOP) {
-               spl_t           s = splsched();
+               thread_precedence_policy_data_t info;
+               __assert_only kern_return_t kret;
 
-               thread_lock(thread);
+               info.importance = 1;
 
-               set_priority(thread, thread->priority + 1);
-
-               thread_unlock(thread);
-               splx(s);
+               kret = thread_policy_set_internal(thread, THREAD_PRECEDENCE_POLICY,
+                                                               (thread_policy_t)&info,
+                                                               THREAD_PRECEDENCE_POLICY_COUNT);
+               assert(kret == KERN_SUCCESS);
        }
 }
 
@@ -490,6 +498,12 @@ ml_processor_register(
     /* fix the CPU id */
     this_cpu_datap->cpu_id = cpu_id;
 
+    /* allocate and initialize other per-cpu structures */
+    if (!boot_cpu) {
+       mp_cpus_call_cpu_init(cpunum);
+       prng_cpu_init(cpunum);
+    }
+
     /* output arg */
     *processor_out = this_cpu_datap->cpu_processor;
 
@@ -619,6 +633,20 @@ ml_init_lock_timeout(void)
        LockTimeOut = (uint32_t) abstime;
        LockTimeOutTSC = (uint32_t) tmrCvt(abstime, tscFCvtn2t);
 
+       /*
+        * TLBTimeOut dictates the TLB flush timeout period. It defaults to
+        * LockTimeOut but can be overriden separately. In particular, a
+        * zero value inhibits the timeout-panic and cuts a trace evnt instead
+        * - see pmap_flush_tlbs().
+        */
+       if (PE_parse_boot_argn("tlbto_us", &slto, sizeof (slto))) {
+               default_timeout_ns = slto * NSEC_PER_USEC;
+               nanoseconds_to_absolutetime(default_timeout_ns, &abstime);
+               TLBTimeOut = (uint32_t) abstime;
+       } else {
+               TLBTimeOut = LockTimeOut;
+       }
+
        if (PE_parse_boot_argn("mtxspin", &mtxspin, sizeof (mtxspin))) {
                if (mtxspin > USEC_PER_SEC>>4)
                        mtxspin =  USEC_PER_SEC>>4;
@@ -799,3 +827,38 @@ boolean_t
 ml_timer_forced_evaluation(void) {
        return ml_timer_evaluation_in_progress;
 }
+
+/* 32-bit right-rotate n bits */
+static inline uint32_t ror32(uint32_t val, const unsigned int n)
+{      
+       __asm__ volatile("rorl %%cl,%0" : "=r" (val) : "0" (val), "c" (n));
+       return val;
+}
+
+void
+ml_entropy_collect(void)
+{
+       uint32_t        tsc_lo, tsc_hi;
+       uint32_t        *ep;
+
+       assert(cpu_number() == master_cpu);
+
+       /* update buffer pointer cyclically */
+       if (EntropyData.index_ptr - EntropyData.buffer == ENTROPY_BUFFER_SIZE)
+               ep = EntropyData.index_ptr = EntropyData.buffer;
+       else
+               ep = EntropyData.index_ptr++;
+
+       rdtsc_nofence(tsc_lo, tsc_hi);
+       *ep = ror32(*ep, 9) ^ tsc_lo;
+}
+
+void
+ml_gpu_stat_update(uint64_t gpu_ns_delta) {
+       current_thread()->machine.thread_gpu_ns += gpu_ns_delta;
+}
+
+uint64_t
+ml_gpu_stat(thread_t t) {
+       return t->machine.thread_gpu_ns;
+}