endmenu
source "arch/um/drivers/Kconfig"
+
+config ARCH_SUSPEND_POSSIBLE
+ def_bool y
+
+source "kernel/power/Kconfig"
extern void timer_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs);
+extern void uml_pm_wake(void);
+
extern int start_uml(void);
extern void paging_init(void);
extern int set_signals_trace(int enable);
extern int os_is_signal_stack(void);
extern void deliver_alarm(void);
+extern void register_pm_wake_signal(void);
/* util.c */
extern void stack_protections(unsigned long address);
#include <linux/sched.h>
#include <linux/sched/task.h>
#include <linux/kmsg_dump.h>
+#include <linux/suspend.h>
#include <asm/processor.h>
#include <asm/sections.h>
void text_poke_sync(void)
{
}
+
+#ifdef CONFIG_PM_SLEEP
+void uml_pm_wake(void)
+{
+ pm_system_wakeup();
+}
+
+static int init_pm_wake_signal(void)
+{
+ /*
+ * In external time-travel mode we can't use signals to wake up
+ * since that would mess with the scheduling. We'll have to do
+ * some additional work to support wakeup on virtio devices or
+ * similar, perhaps implementing a fake RTC controller that can
+ * trigger wakeup (and request the appropriate scheduling from
+ * the external scheduler when going to suspend.)
+ */
+ if (time_travel_mode != TT_MODE_EXTERNAL)
+ register_pm_wake_signal();
+ return 0;
+}
+
+late_initcall(init_pm_wake_signal);
+#endif
panic("enabling signal stack failed, errno = %d\n", errno);
}
+static void sigusr1_handler(int sig, struct siginfo *unused_si, mcontext_t *mc)
+{
+ uml_pm_wake();
+}
+
+void register_pm_wake_signal(void)
+{
+ set_handler(SIGUSR1);
+}
+
static void (*handlers[_NSIG])(int sig, struct siginfo *si, mcontext_t *mc) = {
[SIGSEGV] = sig_handler,
[SIGBUS] = sig_handler,
[SIGIO] = sig_handler,
[SIGWINCH] = sig_handler,
- [SIGALRM] = timer_alarm_handler
+ [SIGALRM] = timer_alarm_handler,
+
+ [SIGUSR1] = sigusr1_handler,
};
static void hard_handler(int sig, siginfo_t *si, void *p)