mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-23 09:48:39 +07:00
81b142245b
The debug messages about what syscore suspend/resume hooks are called are only present if you have initcall debugging enabled. Let's move these messages to pm_pr_dbg() so that the syscore PM messages are included along with all the other PM debugging info that can be seen during suspend/resume debugging. Cc: "Rafael J. Wysocki" <rafael@kernel.org> Signed-off-by: Stephen Boyd <swboyd@chromium.org> Link: https://lore.kernel.org/r/20200806214633.204472-1-swboyd@chromium.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
129 lines
3.2 KiB
C
129 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* syscore.c - Execution of system core operations.
|
|
*
|
|
* Copyright (C) 2011 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc.
|
|
*/
|
|
|
|
#include <linux/syscore_ops.h>
|
|
#include <linux/mutex.h>
|
|
#include <linux/module.h>
|
|
#include <linux/suspend.h>
|
|
#include <trace/events/power.h>
|
|
|
|
static LIST_HEAD(syscore_ops_list);
|
|
static DEFINE_MUTEX(syscore_ops_lock);
|
|
|
|
/**
|
|
* register_syscore_ops - Register a set of system core operations.
|
|
* @ops: System core operations to register.
|
|
*/
|
|
void register_syscore_ops(struct syscore_ops *ops)
|
|
{
|
|
mutex_lock(&syscore_ops_lock);
|
|
list_add_tail(&ops->node, &syscore_ops_list);
|
|
mutex_unlock(&syscore_ops_lock);
|
|
}
|
|
EXPORT_SYMBOL_GPL(register_syscore_ops);
|
|
|
|
/**
|
|
* unregister_syscore_ops - Unregister a set of system core operations.
|
|
* @ops: System core operations to unregister.
|
|
*/
|
|
void unregister_syscore_ops(struct syscore_ops *ops)
|
|
{
|
|
mutex_lock(&syscore_ops_lock);
|
|
list_del(&ops->node);
|
|
mutex_unlock(&syscore_ops_lock);
|
|
}
|
|
EXPORT_SYMBOL_GPL(unregister_syscore_ops);
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
/**
|
|
* syscore_suspend - Execute all the registered system core suspend callbacks.
|
|
*
|
|
* This function is executed with one CPU on-line and disabled interrupts.
|
|
*/
|
|
int syscore_suspend(void)
|
|
{
|
|
struct syscore_ops *ops;
|
|
int ret = 0;
|
|
|
|
trace_suspend_resume(TPS("syscore_suspend"), 0, true);
|
|
pm_pr_dbg("Checking wakeup interrupts\n");
|
|
|
|
/* Return error code if there are any wakeup interrupts pending. */
|
|
if (pm_wakeup_pending())
|
|
return -EBUSY;
|
|
|
|
WARN_ONCE(!irqs_disabled(),
|
|
"Interrupts enabled before system core suspend.\n");
|
|
|
|
list_for_each_entry_reverse(ops, &syscore_ops_list, node)
|
|
if (ops->suspend) {
|
|
pm_pr_dbg("Calling %pS\n", ops->suspend);
|
|
ret = ops->suspend();
|
|
if (ret)
|
|
goto err_out;
|
|
WARN_ONCE(!irqs_disabled(),
|
|
"Interrupts enabled after %pS\n", ops->suspend);
|
|
}
|
|
|
|
trace_suspend_resume(TPS("syscore_suspend"), 0, false);
|
|
return 0;
|
|
|
|
err_out:
|
|
pr_err("PM: System core suspend callback %pS failed.\n", ops->suspend);
|
|
|
|
list_for_each_entry_continue(ops, &syscore_ops_list, node)
|
|
if (ops->resume)
|
|
ops->resume();
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(syscore_suspend);
|
|
|
|
/**
|
|
* syscore_resume - Execute all the registered system core resume callbacks.
|
|
*
|
|
* This function is executed with one CPU on-line and disabled interrupts.
|
|
*/
|
|
void syscore_resume(void)
|
|
{
|
|
struct syscore_ops *ops;
|
|
|
|
trace_suspend_resume(TPS("syscore_resume"), 0, true);
|
|
WARN_ONCE(!irqs_disabled(),
|
|
"Interrupts enabled before system core resume.\n");
|
|
|
|
list_for_each_entry(ops, &syscore_ops_list, node)
|
|
if (ops->resume) {
|
|
pm_pr_dbg("Calling %pS\n", ops->resume);
|
|
ops->resume();
|
|
WARN_ONCE(!irqs_disabled(),
|
|
"Interrupts enabled after %pS\n", ops->resume);
|
|
}
|
|
trace_suspend_resume(TPS("syscore_resume"), 0, false);
|
|
}
|
|
EXPORT_SYMBOL_GPL(syscore_resume);
|
|
#endif /* CONFIG_PM_SLEEP */
|
|
|
|
/**
|
|
* syscore_shutdown - Execute all the registered system core shutdown callbacks.
|
|
*/
|
|
void syscore_shutdown(void)
|
|
{
|
|
struct syscore_ops *ops;
|
|
|
|
mutex_lock(&syscore_ops_lock);
|
|
|
|
list_for_each_entry_reverse(ops, &syscore_ops_list, node)
|
|
if (ops->shutdown) {
|
|
if (initcall_debug)
|
|
pr_info("PM: Calling %pS\n", ops->shutdown);
|
|
ops->shutdown();
|
|
}
|
|
|
|
mutex_unlock(&syscore_ops_lock);
|
|
}
|