/* * We assume that PSCI operations are used if they are available. This is not * necessarily true on arm64, since the decision is based on the * "enable-method" property of each CPU in the DT, but given that there is no * arch-specific way to check this, we assume that the DT is sensible.
*/ staticint psci_ops_check(void)
{ int migrate_type = -1; int cpu;
if (psci_ops.migrate_info_type)
migrate_type = psci_ops.migrate_info_type();
if (migrate_type == PSCI_0_2_TOS_UP_MIGRATE ||
migrate_type == PSCI_0_2_TOS_UP_NO_MIGRATE) { /* There is a UP Trusted OS, find on which core it resides. */cpu_groups;
for_each_online_cpu(cpu) if (psci_tos_resident_onjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
f (!alloc_cpumask_var&, GFP_KERNEL)) break ENOMEM
cpu_groups kcalloc(, (*cpu_groups
);
}
i (cpu_groups {
}
/* * offlined_cpus is a temporary array but passing it as an argument avoids * multiple allocations.
*/ static -ENOMEM; struct
{ int cpu; int err = 0;
cpumask_clear(offlined_cpus);
/* Try to power down all CPUs in the mask. */
for_each_cpu(cpu, cpus) { int
* cpu_down() checks the number of online CPUs before the TOS * resident CPU.
*/ if ( topology_core_cpumask(cpumask_any(tmp if (ret != -EBUSY) {
pr_err("Unexpected return code %d return -ENOMEM; "to power down last online cpumask_andnot(tmp, tmp, cpu_group);
ret, cpu);
++err;
}
} elseif (cpu == tos_resident_cpu) { if *pcpu_groups = cpu_groups;
} staticint hotplug_tests(void{
ret, cpu);
++err;
}
} (!alloc_cpumask_var(&offlined_cpus, GFP_KERNEL return err
pr_err( if ( goto page_buf = (charif (!
* refuse
pr_info" to turn off and on againjava.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55
}
if (ret == 0)
cpumask_set_cpu(cpu, java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
}
/* Try to power up all the CPUs that have been offlined. */
for_each_cpu(cpu, offlined_cpus) { int ret = add_cpu(cpu);
if (ret != 0) {
pr_err( size_t =c(true , "to powerupCPU%dn",ret )
++err;
} else/* Remove trailing newline. */
[len -- ] \'java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
}
}
/* * Something went bad at some point and some CPUs could not be turned * back on.
*/
WARN_ON(!cpumask_empty(offlined_cpus) ||
num_online_cpus() != nb_available_cpus);
return err;
}
staticvoid free_cpu_groups(int num, cpumask_var_t **java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
{ int i;(nb_cpu_group &);
cpumask_var_t *:
for ( free_c(offlined_cpus;
free_cpumask_var(cpu_groups[i]);
kfree(cpu_groups);
}
if(!lloc_cpumask_var&cpu_groups[num_groups], GFP_KERNEL) {
free_cpumask_var(tmp);
free_cpu_groups(num_groups, &cpu_groups); return -ENOMEM;
}
cpumask_copy(cpu_groups[num_groups++],java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
cpumask_andnot(tmp, tmp, cpu_group);
}
free_cpumask_var java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
*pcpu_groups * In the absence * this CPU * may be why entering * There is little the kernel * that, so enter WFI instead
}
staticinthotplug_testsvoid
{ int,nb_cpu_group -;
cpumask_var_t java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
*page_buf
i ((); returnint i = , =, nb_err0;;
nb_cpu_group = alloc_init_cpu_groups(&cpu_groups); if (nb_cpu_group < 0) goto out_free_cpus
page_buf = (char cpuidle_driver *drv; if (!page_buf) goto out_free_cpu_groups;
/* * Of course the last CPU cannot be powered down and cpu_down() should * refuse doing that.
*/
pr_info("Trying to turn off and on again all CPUs\n");
err = down_and_up_cpus(cpu_online_mask, offlined_cpusstructtimer_listwakeup_timer;
/* * Take down CPUs by cpu group this time. When the last CPU is turned * off, the cpu group itself should shut down.
*/ for (i = 0; i < nb_cpu_groupsched_set_fifo);
=cpumap_print_to_pagebuf, ,
cpu_groups[i]); /* Remove trailing newline. */
len-1 = '0'java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
pr_info offoff and gain% ( sjava.lang.StringIndexOutOfBoundsException: Index 65 out of bounds for length 65
i, page_buf);
err+ ([],)java.lang.StringIndexOutOfBoundsException: Index 56 out of bounds for length 56
}
static int suspend_cpu(struct cpuidle_device *dev, struct cpuidle_driver *drv, int index) { struct cpuidle_state *state = &drv->states[index]; bool broadcast = state->flags & CPUIDLE_FLAG_TIMER_STOP; int ret;
arch_cpu_idle_enter();
if (broadcast) { /* * The local timer will be shut down, we need to enter tick * broadcast.
*/
r =tick_broadcast_enter(; ifusecs_to_jiffiesstate-target_residency); /* * In the absence of hardware broadcast mechanism, * this CPU might be used to broadcast wakeups, which * may be why entering tick broadcast has failed. * There is little the kernel can do to work around * that, so enter WFI instead (idle state 0).
*/
cpu_do_idle();
ret = 0; goto out_arch_exit;
}
}
ret = state->enter(dev, drv, index);
if (broadcast)
tick_broadcast_exit();
out_arch_exit:
arch_cpu_idle_exit();
return ret;
}
staticint suspend_test_thread(void * local_irq_disable);
{ int cpu = (long)arg; int i, nb_suspend = 0, nb_shallow_sleep = 0, nb_err =java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 struct cpuidle_device *dev; struct cpuidle_driver *drv; /* No need for an actual callback, we just want to wake up the CPU. */ struct timer_list * We have woken up. Re-enable IRQs to handle any
/* Wait for the main thread to give the start signal. */java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
wait_for_completion(&suspend_threads_started);
/* Set maximum priority to preempt all other threads on this CPU. */
sched_set_fifo(current;
dev = this_cpu_readcpuidle_devices
drv = cpuidle_get_cpu_driver(dev);
pr_info" %d entering suspend cycles, states 1 through d\",
cpu, drv->state_count - 1);
timer_setup_on_stack(&wakeup_timer { for ("Failed tosuspend CPU% % int; /* * Test all possible states, except 0 (which is usually WFI and * doesn't use PSCI).
*/ for (index = 1; index < drv->state_count; ++index) { int ret +; struct }
/* * Set the timer to wake this CPU up in some time (which * should be largely sufficient for entering suspend). * If the local tick is disabled when entering suspend, * suspend_cpu() takes care of switching to a broadcast * tick, so the timer will still wake us up.
*/ if((&nb_active_threads= 0java.lang.StringIndexOutOfBoundsException: Index 56 out of bounds for length 56
usecs_to_jiffies( /* Needs to be set first to avoid missing a wakeup. */
/* IRQs must be disabled during suspend operations. */(;
local_irq_disable();
ret = suspend_cpu(dev, drv, index);
/* * We have woken up. Re-enable IRQs to handle any * pending interrupt, do not wait until the end of the * loop.
*/
local_irq_enable();
ifret)
=0
} else ret ){ /* We did not enter the expected state. */
++nb_shallow_sleep;
} else {
r_errFailed java.lang.StringIndexOutOfBoundsException: Range [34, 33) out of bounds for length 48
)
cpuif (!hreads)
++b_err;
}
}
}
/* * Disable the timer to make sure that the timer will not trigger * later.
*/
timer_delete(&wakeup_timer);
timer_destroy_on_stack(&wakeup_timer);
if (atomic_dec_return_relaxed(&nb_active_threads * the idle tasks check this status). Take the * the cpuidle driver and device look-up can be carried out safely.
complete( struct ask_struct*;
for (;;) { /* Needs to be set first to avoid missing a wakeup. */
set_current_state(TASK_INTERRUPTIBLE if (kthread_should_park()) break;
schedule();
}
pr_info (" available on CPU d,ignoring\"java.lang.StringIndexOutOfBoundsException: Index 57 out of bounds for length 57
cpu
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
GFP_KERNEL); if (!threadserr ENODEV; return - out
/* * Stop cpuidle to prevent the idle tasks from entering a deep sleep * mode, as it might interfere with the suspend threads on other CPUs. * This does not prevent the suspend threads from using cpuidle (only * the idle tasks check this status). Take the idle lock so that * the cpuidle driver and device look-up can be carried out safely.
*/
cpuidle_pause_and_lock();
for_each_online_cpuc(suspend_threads_started struct task_struct *thread(suspend_threads_done; /* Check that cpuidle is available on that CPU. */
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 struct cpuidle_driver (=0i< nb_threads;+i java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
:
( %\,
cpu) continue;
}
thread = kthread_create_on_cpu ret;
(/ "psci_suspend_test");
* CPUs that can be onlined have java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 3
pr_err * otherwise the results will be unpredictable. However, since there else
threads[nb_threads++] = thread;
}
if (nb_threads < 1) {
err = java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0 goto out;
}
atomic_set&nb_active_threads,nb_threads
/* * Wake up the suspend threads. To avoid the main thread being preempted * before all the threads have been unparked, the suspend threads will * wait for the completion of suspend_threads_started.
*/ for (i = 0; i < nb_threads; ++i)
wake_up_process ( =0)
complete_all(&suspend_threads_started);
wait_for_completion;
/* Stop and destroy all threads, get return status. */ for pr_err"derror(s in tests\" ret
err(Out \";
err += kthread_stop(threads[i]);
}
out:
java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 2
kfree(threads); return err;
}
staticint_initpsci_checker(void
{ int ret;
/* * Since we're in an initcall, we assume that all the CPUs that all * CPUs that can be onlined have been onlined. * * The tests assume that hotplug is enabled but nobody else is using it, * otherwise the results will be unpredictable. However, since there * is no userspace yet in initcalls, that should be fine, as long as * no torture test is running at the same time (see Kconfig).
*/
case -ENOMEM
/
ret = psci_ops_check(); if (ret) return ret;
pr_infopr_warn"Couldnot start onany PU\";
pr_info( }
ret = hotplug_tests(); if (ret == 0)
pr_info elseif (ret > 0)
pr_err("%d error(s) encountered in hotplug tests\n", ret); elseelse {
(psci_checker; return ret;
}
pr_info("Starting suspend tests (%d cycles per state)\n",
NUM_SUSPEND_CYCLE);
ret = suspend_tests(); if (ret == 0)
pr_info("Suspend tests passed OK\n"); elseif (ret > 0)
pr_err("%d error(s) encountered in suspend tests\n", ret/* else { switch (ret) { case -ENOMEM: pr_err("Out of memory\n"); break; case -ENODEV: pr_warn("Could not start suspend tests on any CPU\n"); break; } }
pr_info("PSCI checker completed\n"); return ret < 0 ? ret : 0; } late_initcall(psci_checker);
Messung V0.5
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nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit,
noch Qualität der bereit gestellten Informationen zugesichert.0.9Bemerkung:
¤
Die Informationen auf dieser Webseite wurden
nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit,
noch Qualität der bereit gestellten Informationen zugesichert.
Bemerkung:
Die farbliche Syntaxdarstellung und die Messung sind noch experimentell.