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pmCPU.c
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pmCPU.c
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/*
* Copyright (c) 2004-2011 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* CPU-specific power management support.
*
* Implements the "wrappers" to the KEXT.
*/
#include <i386/asm.h>
#include <i386/machine_cpu.h>
#include <i386/mp.h>
#include <i386/machine_routines.h>
#include <i386/proc_reg.h>
#include <i386/pmap.h>
#include <i386/misc_protos.h>
#include <kern/machine.h>
#include <kern/pms.h>
#include <kern/processor.h>
#include <kern/timer_queue.h>
#include <i386/cpu_threads.h>
#include <i386/pmCPU.h>
#include <i386/cpuid.h>
#include <i386/rtclock_protos.h>
#include <kern/sched_prim.h>
#include <i386/lapic.h>
#include <i386/pal_routines.h>
#include <sys/kdebug.h>
#include <i386/tsc.h>
#include <kern/sched_urgency.h>
extern int disableConsoleOutput;
#define DELAY_UNSET 0xFFFFFFFFFFFFFFFFULL
uint64_t cpu_itime_bins[CPU_ITIME_BINS] = {16 * NSEC_PER_USEC, 32 * NSEC_PER_USEC, 64 * NSEC_PER_USEC, 128 * NSEC_PER_USEC, 256 * NSEC_PER_USEC, 512 * NSEC_PER_USEC, 1024 * NSEC_PER_USEC, 2048 * NSEC_PER_USEC, 4096 * NSEC_PER_USEC, 8192 * NSEC_PER_USEC, 16384 * NSEC_PER_USEC, 32768 * NSEC_PER_USEC};
uint64_t *cpu_rtime_bins = &cpu_itime_bins[0];
/*
* The following is set when the KEXT loads and initializes.
*/
pmDispatch_t *pmDispatch = NULL;
uint32_t pmInitDone = 0;
static boolean_t earlyTopology = FALSE;
static uint64_t earlyMaxBusDelay = DELAY_UNSET;
static uint64_t earlyMaxIntDelay = DELAY_UNSET;
/*
* Initialize the Cstate change code.
*/
void
power_management_init(void)
{
if (pmDispatch != NULL && pmDispatch->cstateInit != NULL) {
(*pmDispatch->cstateInit)();
}
}
static inline void
machine_classify_interval(uint64_t interval, uint64_t *bins, uint64_t *binvals, uint32_t nbins)
{
uint32_t i;
for (i = 0; i < nbins; i++) {
if (interval < binvals[i]) {
bins[i]++;
break;
}
}
}
uint64_t idle_pending_timers_processed;
uint32_t idle_entry_timer_processing_hdeadline_threshold = 5000000;
/*
* Called when the CPU is idle. It calls into the power management kext
* to determine the best way to idle the CPU.
*/
void
machine_idle(void)
{
cpu_data_t *my_cpu = current_cpu_datap();
__unused uint32_t cnum = my_cpu->cpu_number;
uint64_t ctime, rtime, itime;
#if CST_DEMOTION_DEBUG
processor_t cproc = my_cpu->cpu_processor;
uint64_t cwakeups = my_cpu->cpu_wakeups_issued_total;
#endif /* CST_DEMOTION_DEBUG */
uint64_t esdeadline, ehdeadline;
boolean_t do_process_pending_timers = FALSE;
ctime = mach_absolute_time();
esdeadline = my_cpu->rtclock_timer.queue.earliest_soft_deadline;
ehdeadline = my_cpu->rtclock_timer.deadline;
/* Determine if pending timers exist */
if ((ctime >= esdeadline) && (ctime < ehdeadline) &&
((ehdeadline - ctime) < idle_entry_timer_processing_hdeadline_threshold)) {
idle_pending_timers_processed++;
do_process_pending_timers = TRUE;
goto machine_idle_exit;
} else {
TCOAL_DEBUG(0xCCCC0000, ctime, my_cpu->rtclock_timer.queue.earliest_soft_deadline, my_cpu->rtclock_timer.deadline, idle_pending_timers_processed, 0);
}
my_cpu->lcpu.state = LCPU_IDLE;
DBGLOG(cpu_handle, cpu_number(), MP_IDLE);
MARK_CPU_IDLE(cnum);
rtime = ctime - my_cpu->cpu_ixtime;
my_cpu->cpu_rtime_total += rtime;
machine_classify_interval(rtime, &my_cpu->cpu_rtimes[0], &cpu_rtime_bins[0], CPU_RTIME_BINS);
#if CST_DEMOTION_DEBUG
uint32_t cl = 0, ch = 0;
uint64_t c3res, c6res, c7res;
rdmsr_carefully(MSR_IA32_CORE_C3_RESIDENCY, &cl, &ch);
c3res = ((uint64_t)ch << 32) | cl;
rdmsr_carefully(MSR_IA32_CORE_C6_RESIDENCY, &cl, &ch);
c6res = ((uint64_t)ch << 32) | cl;
rdmsr_carefully(MSR_IA32_CORE_C7_RESIDENCY, &cl, &ch);
c7res = ((uint64_t)ch << 32) | cl;
#endif
if (pmInitDone) {
/*
* Handle case where ml_set_maxbusdelay() or ml_set_maxintdelay()
* were called prior to the CPU PM kext being registered. We do
* this here since we know at this point the values will be first
* used since idle is where the decisions using these values is made.
*/
if (earlyMaxBusDelay != DELAY_UNSET) {
ml_set_maxbusdelay((uint32_t)(earlyMaxBusDelay & 0xFFFFFFFF));
}
if (earlyMaxIntDelay != DELAY_UNSET) {
ml_set_maxintdelay(earlyMaxIntDelay);
}
}
if (pmInitDone
&& pmDispatch != NULL
&& pmDispatch->MachineIdle != NULL) {
(*pmDispatch->MachineIdle)(0x7FFFFFFFFFFFFFFFULL);
} else {
/*
* If no power management, re-enable interrupts and halt.
* This will keep the CPU from spinning through the scheduler
* and will allow at least some minimal power savings (but it
* cause problems in some MP configurations w.r.t. the APIC
* stopping during a GV3 transition).
*/
pal_hlt();
/* Once woken, re-disable interrupts. */
pal_cli();
}
/*
* Mark the CPU as running again.
*/
MARK_CPU_ACTIVE(cnum);
DBGLOG(cpu_handle, cnum, MP_UNIDLE);
my_cpu->lcpu.state = LCPU_RUN;
uint64_t ixtime = my_cpu->cpu_ixtime = mach_absolute_time();
itime = ixtime - ctime;
my_cpu->cpu_idle_exits++;
my_cpu->cpu_itime_total += itime;
machine_classify_interval(itime, &my_cpu->cpu_itimes[0], &cpu_itime_bins[0], CPU_ITIME_BINS);
#if CST_DEMOTION_DEBUG
cl = ch = 0;
rdmsr_carefully(MSR_IA32_CORE_C3_RESIDENCY, &cl, &ch);
c3res = (((uint64_t)ch << 32) | cl) - c3res;
rdmsr_carefully(MSR_IA32_CORE_C6_RESIDENCY, &cl, &ch);
c6res = (((uint64_t)ch << 32) | cl) - c6res;
rdmsr_carefully(MSR_IA32_CORE_C7_RESIDENCY, &cl, &ch);
c7res = (((uint64_t)ch << 32) | cl) - c7res;
uint64_t ndelta = itime - tmrCvt(c3res + c6res + c7res, tscFCvtt2n);
KERNEL_DEBUG_CONSTANT(0xcead0000, ndelta, itime, c7res, c6res, c3res);
if ((itime > 1000000) && (ndelta > 250000)) {
KERNEL_DEBUG_CONSTANT(0xceae0000, ndelta, itime, c7res, c6res, c3res);
}
#endif
machine_idle_exit:
/*
* Re-enable interrupts.
*/
pal_sti();
if (do_process_pending_timers) {
TCOAL_DEBUG(0xBBBB0000 | DBG_FUNC_START, ctime, esdeadline, ehdeadline, idle_pending_timers_processed, 0);
/* Adjust to reflect that this isn't truly a package idle exit */
__sync_fetch_and_sub(&my_cpu->lcpu.package->num_idle, 1);
lapic_timer_swi(); /* Trigger software timer interrupt */
__sync_fetch_and_add(&my_cpu->lcpu.package->num_idle, 1);
TCOAL_DEBUG(0xBBBB0000 | DBG_FUNC_END, ctime, esdeadline, idle_pending_timers_processed, 0, 0);
}
#if CST_DEMOTION_DEBUG
uint64_t nwakeups = my_cpu->cpu_wakeups_issued_total;
if ((nwakeups == cwakeups) && (topoParms.nLThreadsPerPackage == my_cpu->lcpu.package->num_idle)) {
KERNEL_DEBUG_CONSTANT(0xceaa0000, cwakeups, 0, 0, 0, 0);
}
#endif
}
/*
* Called when the CPU is to be halted. It will choose the best C-State
* to be in.
*/
void
pmCPUHalt(uint32_t reason)
{
cpu_data_t *cpup = current_cpu_datap();
switch (reason) {
case PM_HALT_DEBUG:
cpup->lcpu.state = LCPU_PAUSE;
pal_stop_cpu(FALSE);
break;
case PM_HALT_PANIC:
cpup->lcpu.state = LCPU_PAUSE;
pal_stop_cpu(TRUE);
break;
case PM_HALT_NORMAL:
case PM_HALT_SLEEP:
default:
pal_cli();
if (pmInitDone
&& pmDispatch != NULL
&& pmDispatch->pmCPUHalt != NULL) {
/*
* Halt the CPU (and put it in a low power state.
*/
(*pmDispatch->pmCPUHalt)();
/*
* We've exited halt, so get the CPU schedulable again.
* - by calling the fast init routine for a slave, or
* - by returning if we're the master processor.
*/
if (cpup->cpu_number != master_cpu) {
i386_init_slave_fast();
panic("init_slave_fast returned");
}
} else {
/*
* If no power managment and a processor is taken off-line,
* then invalidate the cache and halt it (it will not be able
* to be brought back on-line without resetting the CPU).
*/
__asm__ volatile ("wbinvd");
cpup->lcpu.state = LCPU_HALT;
pal_stop_cpu(FALSE);
panic("back from Halt");
}
break;
}
}
void
pmMarkAllCPUsOff(void)
{
if (pmInitDone
&& pmDispatch != NULL
&& pmDispatch->markAllCPUsOff != NULL) {
(*pmDispatch->markAllCPUsOff)();
}
}
static void
pmInitComplete(void)
{
if (earlyTopology
&& pmDispatch != NULL
&& pmDispatch->pmCPUStateInit != NULL) {
(*pmDispatch->pmCPUStateInit)();
earlyTopology = FALSE;
}
pmInitDone = 1;
}
x86_lcpu_t *
pmGetLogicalCPU(int cpu)
{
return cpu_to_lcpu(cpu);
}
x86_lcpu_t *
pmGetMyLogicalCPU(void)
{
cpu_data_t *cpup = current_cpu_datap();
return &cpup->lcpu;
}
static x86_core_t *
pmGetCore(int cpu)
{
return cpu_to_core(cpu);
}
static x86_core_t *
pmGetMyCore(void)
{
cpu_data_t *cpup = current_cpu_datap();
return cpup->lcpu.core;
}
static x86_die_t *
pmGetDie(int cpu)
{
return cpu_to_die(cpu);
}
static x86_die_t *
pmGetMyDie(void)
{
cpu_data_t *cpup = current_cpu_datap();
return cpup->lcpu.die;
}
static x86_pkg_t *
pmGetPackage(int cpu)
{
return cpu_to_package(cpu);
}
static x86_pkg_t *
pmGetMyPackage(void)
{
cpu_data_t *cpup = current_cpu_datap();
return cpup->lcpu.package;
}
static void
pmLockCPUTopology(int lock)
{
if (lock) {
mp_safe_spin_lock(&x86_topo_lock);
} else {
simple_unlock(&x86_topo_lock);
}
}
/*
* Called to get the next deadline that has been set by the
* power management code.
* Note: a return of 0 from AICPM and this routine signifies
* that no deadline is set.
*/
uint64_t
pmCPUGetDeadline(cpu_data_t *cpu)
{
uint64_t deadline = 0;
if (pmInitDone
&& pmDispatch != NULL
&& pmDispatch->GetDeadline != NULL) {
deadline = (*pmDispatch->GetDeadline)(&cpu->lcpu);
}
return deadline;
}
/*
* Called to determine if the supplied deadline or the power management
* deadline is sooner. Returns which ever one is first.
*/
uint64_t
pmCPUSetDeadline(cpu_data_t *cpu, uint64_t deadline)
{
if (pmInitDone
&& pmDispatch != NULL
&& pmDispatch->SetDeadline != NULL) {
deadline = (*pmDispatch->SetDeadline)(&cpu->lcpu, deadline);
}
return deadline;
}
/*
* Called when a power management deadline expires.
*/
void
pmCPUDeadline(cpu_data_t *cpu)
{
if (pmInitDone
&& pmDispatch != NULL
&& pmDispatch->Deadline != NULL) {
(*pmDispatch->Deadline)(&cpu->lcpu);
}
}
/*
* Called to get a CPU out of idle.
*/
boolean_t
pmCPUExitIdle(cpu_data_t *cpu)
{
boolean_t do_ipi;
if (pmInitDone
&& pmDispatch != NULL
&& pmDispatch->exitIdle != NULL) {
do_ipi = (*pmDispatch->exitIdle)(&cpu->lcpu);
} else {
do_ipi = TRUE;
}
return do_ipi;
}
kern_return_t
pmCPUExitHalt(int cpu)
{
kern_return_t rc = KERN_INVALID_ARGUMENT;
if (pmInitDone
&& pmDispatch != NULL
&& pmDispatch->exitHalt != NULL) {
rc = pmDispatch->exitHalt(cpu_to_lcpu(cpu));
}
return rc;
}
kern_return_t
pmCPUExitHaltToOff(int cpu)
{
kern_return_t rc = KERN_SUCCESS;
if (pmInitDone
&& pmDispatch != NULL
&& pmDispatch->exitHaltToOff != NULL) {
rc = pmDispatch->exitHaltToOff(cpu_to_lcpu(cpu));
}
return rc;
}
/*
* Called to initialize the power management structures for the CPUs.
*/
void
pmCPUStateInit(void)
{
if (pmDispatch != NULL && pmDispatch->pmCPUStateInit != NULL) {
(*pmDispatch->pmCPUStateInit)();
} else {
earlyTopology = TRUE;
}
}
/*
* Called when a CPU is being restarted after being powered off (as in S3).
*/
void
pmCPUMarkRunning(cpu_data_t *cpu)
{
cpu_data_t *cpup = current_cpu_datap();
if (pmInitDone
&& pmDispatch != NULL
&& pmDispatch->markCPURunning != NULL) {
(*pmDispatch->markCPURunning)(&cpu->lcpu);
} else {
cpup->lcpu.state = LCPU_RUN;
}
}
/*
* Called to get/set CPU power management state.
*/
int
pmCPUControl(uint32_t cmd, void *datap)
{
int rc = -1;
if (pmDispatch != NULL
&& pmDispatch->pmCPUControl != NULL) {
rc = (*pmDispatch->pmCPUControl)(cmd, datap);
}
return rc;
}
/*
* Called to save the timer state used by power management prior
* to "sleeping".
*/
void
pmTimerSave(void)
{
if (pmDispatch != NULL
&& pmDispatch->pmTimerStateSave != NULL) {
(*pmDispatch->pmTimerStateSave)();
}
}
/*
* Called to restore the timer state used by power management after
* waking from "sleep".
*/
void
pmTimerRestore(void)
{
if (pmDispatch != NULL
&& pmDispatch->pmTimerStateRestore != NULL) {
(*pmDispatch->pmTimerStateRestore)();
}
}
/*
* Set the worst-case time for the C4 to C2 transition.
* No longer does anything.
*/
void
ml_set_maxsnoop(__unused uint32_t maxdelay)
{
}
/*
* Get the worst-case time for the C4 to C2 transition. Returns nanoseconds.
*/
unsigned
ml_get_maxsnoop(void)
{
uint64_t max_snoop = 0;
if (pmInitDone
&& pmDispatch != NULL
&& pmDispatch->getMaxSnoop != NULL) {
max_snoop = pmDispatch->getMaxSnoop();
}
return (unsigned)(max_snoop & 0xffffffff);
}
uint32_t
ml_get_maxbusdelay(void)
{
uint64_t max_delay = 0;
if (pmInitDone
&& pmDispatch != NULL
&& pmDispatch->getMaxBusDelay != NULL) {
max_delay = pmDispatch->getMaxBusDelay();
}
return (uint32_t)(max_delay & 0xffffffff);
}
/*
* Advertise a memory access latency tolerance of "mdelay" ns
*/
void
ml_set_maxbusdelay(uint32_t mdelay)
{
uint64_t maxdelay = mdelay;
if (pmDispatch != NULL
&& pmDispatch->setMaxBusDelay != NULL) {
earlyMaxBusDelay = DELAY_UNSET;
pmDispatch->setMaxBusDelay(maxdelay);
} else {
earlyMaxBusDelay = maxdelay;
}
}
uint64_t
ml_get_maxintdelay(void)
{
uint64_t max_delay = 0;
if (pmDispatch != NULL
&& pmDispatch->getMaxIntDelay != NULL) {
max_delay = pmDispatch->getMaxIntDelay();
}
return max_delay;
}
/*
* Set the maximum delay allowed for an interrupt.
*/
void
ml_set_maxintdelay(uint64_t mdelay)
{
if (pmDispatch != NULL
&& pmDispatch->setMaxIntDelay != NULL) {
earlyMaxIntDelay = DELAY_UNSET;
pmDispatch->setMaxIntDelay(mdelay);
} else {
earlyMaxIntDelay = mdelay;
}
}
boolean_t
ml_get_interrupt_prewake_applicable()
{
boolean_t applicable = FALSE;
if (pmInitDone
&& pmDispatch != NULL
&& pmDispatch->pmInterruptPrewakeApplicable != NULL) {
applicable = pmDispatch->pmInterruptPrewakeApplicable();
}
return applicable;
}
/*
* Put a CPU into "safe" mode with respect to power.
*
* Some systems cannot operate at a continuous "normal" speed without
* exceeding the thermal design. This is called per-CPU to place the
* CPUs into a "safe" operating mode.
*/
void
pmSafeMode(x86_lcpu_t *lcpu, uint32_t flags)
{
if (pmDispatch != NULL
&& pmDispatch->pmCPUSafeMode != NULL) {
pmDispatch->pmCPUSafeMode(lcpu, flags);
} else {
/*
* Do something reasonable if the KEXT isn't present.
*
* We only look at the PAUSE and RESUME flags. The other flag(s)
* will not make any sense without the KEXT, so just ignore them.
*
* We set the CPU's state to indicate that it's halted. If this
* is the CPU we're currently running on, then spin until the
* state becomes non-halted.
*/
if (flags & PM_SAFE_FL_PAUSE) {
lcpu->state = LCPU_PAUSE;
if (lcpu == x86_lcpu()) {
while (lcpu->state == LCPU_PAUSE) {
cpu_pause();
}
}
}
/*
* Clear the halted flag for the specified CPU, that will
* get it out of it's spin loop.
*/
if (flags & PM_SAFE_FL_RESUME) {
lcpu->state = LCPU_RUN;
}
}
}
static uint32_t saved_run_count = 0;
void
machine_run_count(uint32_t count)
{
if (pmDispatch != NULL
&& pmDispatch->pmSetRunCount != NULL) {
pmDispatch->pmSetRunCount(count);
} else {
saved_run_count = count;
}
}
processor_t
machine_choose_processor(processor_set_t pset,
processor_t preferred)
{
int startCPU;
int endCPU;
int preferredCPU;
int chosenCPU;
if (!pmInitDone) {
return preferred;
}
if (pset == NULL) {
startCPU = -1;
endCPU = -1;
} else {
startCPU = pset->cpu_set_low;
endCPU = pset->cpu_set_hi;
}
if (preferred == NULL) {
preferredCPU = -1;
} else {
preferredCPU = preferred->cpu_id;
}
if (pmDispatch != NULL
&& pmDispatch->pmChooseCPU != NULL) {
chosenCPU = pmDispatch->pmChooseCPU(startCPU, endCPU, preferredCPU);
if (chosenCPU == -1) {
return NULL;
}
return cpu_datap(chosenCPU)->cpu_processor;
}
return preferred;
}
static int
pmThreadGetUrgency(uint64_t *rt_period, uint64_t *rt_deadline)
{
thread_urgency_t urgency;
uint64_t arg1, arg2;
urgency = thread_get_urgency(THREAD_NULL, &arg1, &arg2);
if (urgency == THREAD_URGENCY_REAL_TIME) {
if (rt_period != NULL) {
*rt_period = arg1;
}
if (rt_deadline != NULL) {
*rt_deadline = arg2;
}
}
return (int)urgency;
}
#if DEBUG
uint32_t urgency_stats[64][THREAD_URGENCY_MAX];
#endif
#define URGENCY_NOTIFICATION_ASSERT_NS (5 * 1000 * 1000)
uint64_t urgency_notification_assert_abstime_threshold, urgency_notification_max_recorded;
void
thread_tell_urgency(thread_urgency_t urgency,
uint64_t rt_period,
uint64_t rt_deadline,
uint64_t sched_latency,
thread_t nthread)
{
uint64_t urgency_notification_time_start = 0, delta;
boolean_t urgency_assert = (urgency_notification_assert_abstime_threshold != 0);
assert(get_preemption_level() > 0 || ml_get_interrupts_enabled() == FALSE);
#if DEBUG
urgency_stats[cpu_number() % 64][urgency]++;
#endif
if (!pmInitDone
|| pmDispatch == NULL
|| pmDispatch->pmThreadTellUrgency == NULL) {
return;
}
SCHED_DEBUG_PLATFORM_KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_SCHED, MACH_URGENCY) | DBG_FUNC_START, urgency, rt_period, rt_deadline, sched_latency, 0);
if (__improbable((urgency_assert == TRUE))) {
urgency_notification_time_start = mach_absolute_time();
}
current_cpu_datap()->cpu_nthread = nthread;
pmDispatch->pmThreadTellUrgency(urgency, rt_period, rt_deadline);
if (__improbable((urgency_assert == TRUE))) {
delta = mach_absolute_time() - urgency_notification_time_start;
if (__improbable(delta > urgency_notification_max_recorded)) {
/* This is not synchronized, but it doesn't matter
* if we (rarely) miss an event, as it is statistically
* unlikely that it will never recur.
*/
urgency_notification_max_recorded = delta;
if (__improbable((delta > urgency_notification_assert_abstime_threshold) && !machine_timeout_suspended())) {
panic("Urgency notification callout %p exceeded threshold, 0x%llx abstime units", pmDispatch->pmThreadTellUrgency, delta);
}
}
}
SCHED_DEBUG_PLATFORM_KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_SCHED, MACH_URGENCY) | DBG_FUNC_END, urgency, rt_period, rt_deadline, 0, 0);
}
void
machine_thread_going_on_core(__unused thread_t new_thread,
__unused thread_urgency_t urgency,
__unused uint64_t sched_latency,
__unused uint64_t same_pri_latency,
__unused uint64_t dispatch_time)
{
}
void
machine_thread_going_off_core(thread_t old_thread, boolean_t thread_terminating,
uint64_t last_dispatch, boolean_t thread_runnable)
{
if (!pmInitDone
|| pmDispatch == NULL
|| pmDispatch->pmThreadGoingOffCore == NULL) {
return;
}
pmDispatch->pmThreadGoingOffCore(old_thread, thread_terminating,
last_dispatch, thread_runnable);
}
void
machine_max_runnable_latency(__unused uint64_t bg_max_latency,
__unused uint64_t default_max_latency,
__unused uint64_t realtime_max_latency)
{
}
void
machine_work_interval_notify(__unused thread_t thread,
__unused struct kern_work_interval_args* kwi_args)
{
}
void
machine_switch_perfcontrol_context(__unused perfcontrol_event event,
__unused uint64_t timestamp,
__unused uint32_t flags,
__unused uint64_t new_thread_same_pri_latency,
__unused thread_t old,
__unused thread_t new)
{
}
void
machine_switch_perfcontrol_state_update(__unused perfcontrol_event event,
__unused uint64_t timestamp,
__unused uint32_t flags,
__unused thread_t thread)
{
}
void
active_rt_threads(boolean_t active)
{
if (!pmInitDone
|| pmDispatch == NULL
|| pmDispatch->pmActiveRTThreads == NULL) {
return;
}
pmDispatch->pmActiveRTThreads(active);
}
static uint32_t
pmGetSavedRunCount(void)
{
return saved_run_count;
}
/*
* Returns the root of the package tree.
*/
x86_pkg_t *
pmGetPkgRoot(void)
{
return x86_pkgs;
}
static boolean_t
pmCPUGetHibernate(int cpu)
{
return cpu_datap(cpu)->cpu_hibernate;
}
processor_t
pmLCPUtoProcessor(int lcpu)
{
return cpu_datap(lcpu)->cpu_processor;
}
static void
pmReSyncDeadlines(int cpu)
{
static boolean_t registered = FALSE;
if (!registered) {
PM_interrupt_register(&timer_resync_deadlines);
registered = TRUE;
}
if ((uint32_t)cpu == current_cpu_datap()->lcpu.cpu_num) {
timer_resync_deadlines();
} else {
cpu_PM_interrupt(cpu);
}
}
static void
pmSendIPI(int cpu)
{
lapic_send_ipi(cpu, LAPIC_PM_INTERRUPT);
}
static void
pmGetNanotimeInfo(pm_rtc_nanotime_t *rtc_nanotime)
{
/*
* Make sure that nanotime didn't change while we were reading it.
*/
do {
rtc_nanotime->generation = pal_rtc_nanotime_info.generation; /* must be first */
rtc_nanotime->tsc_base = pal_rtc_nanotime_info.tsc_base;
rtc_nanotime->ns_base = pal_rtc_nanotime_info.ns_base;
rtc_nanotime->scale = pal_rtc_nanotime_info.scale;
rtc_nanotime->shift = pal_rtc_nanotime_info.shift;
} while (pal_rtc_nanotime_info.generation != 0
&& rtc_nanotime->generation != pal_rtc_nanotime_info.generation);
}
uint32_t
pmTimerQueueMigrate(int target_cpu)
{
/* Call the etimer code to do this. */
return (target_cpu != cpu_number())
? timer_queue_migrate_cpu(target_cpu)
: 0;
}
/*
* Called by the power management kext to register itself and to get the
* callbacks it might need into other kernel functions. This interface
* is versioned to allow for slight mis-matches between the kext and the
* kernel.
*/
void
pmKextRegister(uint32_t version, pmDispatch_t *cpuFuncs,
pmCallBacks_t *callbacks)
{
if (callbacks != NULL && version == PM_DISPATCH_VERSION) {
callbacks->setRTCPop = setPop;
callbacks->resyncDeadlines = pmReSyncDeadlines;
callbacks->initComplete = pmInitComplete;
callbacks->GetLCPU = pmGetLogicalCPU;
callbacks->GetCore = pmGetCore;
callbacks->GetDie = pmGetDie;
callbacks->GetPackage = pmGetPackage;
callbacks->GetMyLCPU = pmGetMyLogicalCPU;
callbacks->GetMyCore = pmGetMyCore;
callbacks->GetMyDie = pmGetMyDie;
callbacks->GetMyPackage = pmGetMyPackage;
callbacks->GetPkgRoot = pmGetPkgRoot;
callbacks->LockCPUTopology = pmLockCPUTopology;
callbacks->GetHibernate = pmCPUGetHibernate;
callbacks->LCPUtoProcessor = pmLCPUtoProcessor;
callbacks->ThreadBind = thread_bind;
callbacks->GetSavedRunCount = pmGetSavedRunCount;
callbacks->GetNanotimeInfo = pmGetNanotimeInfo;
callbacks->ThreadGetUrgency = pmThreadGetUrgency;
callbacks->RTCClockAdjust = rtc_clock_adjust;
callbacks->timerQueueMigrate = pmTimerQueueMigrate;
callbacks->topoParms = &topoParms;
callbacks->pmSendIPI = pmSendIPI;
callbacks->InterruptPending = lapic_is_interrupt_pending;
callbacks->IsInterrupting = lapic_is_interrupting;