diff options
Diffstat (limited to 'arch/um/kernel/irq.c')
| -rw-r--r-- | arch/um/kernel/irq.c | 35 |
1 files changed, 29 insertions, 6 deletions
diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c index 82af5191e73d..1c448ea4729e 100644 --- a/arch/um/kernel/irq.c +++ b/arch/um/kernel/irq.c @@ -123,7 +123,8 @@ static bool irq_do_timetravel_handler(struct irq_entry *entry, #endif static void sigio_reg_handler(int idx, struct irq_entry *entry, enum um_irq_type t, - struct uml_pt_regs *regs) + struct uml_pt_regs *regs, + bool timetravel_handlers_only) { struct irq_reg *reg = &entry->reg[t]; @@ -136,18 +137,29 @@ static void sigio_reg_handler(int idx, struct irq_entry *entry, enum um_irq_type if (irq_do_timetravel_handler(entry, t)) return; - if (irqs_suspended) + /* + * If we're called to only run time-travel handlers then don't + * actually proceed but mark sigio as pending (if applicable). + * For suspend/resume, timetravel_handlers_only may be true + * despite time-travel not being configured and used. + */ + if (timetravel_handlers_only) { +#ifdef CONFIG_UML_TIME_TRAVEL_SUPPORT + mark_sigio_pending(); +#endif return; + } irq_io_loop(reg, regs); } -void sigio_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs) +static void _sigio_handler(struct uml_pt_regs *regs, + bool timetravel_handlers_only) { struct irq_entry *irq_entry; int n, i; - if (irqs_suspended && !um_irq_timetravel_handler_used()) + if (timetravel_handlers_only && !um_irq_timetravel_handler_used()) return; while (1) { @@ -172,14 +184,20 @@ void sigio_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs) irq_entry = os_epoll_get_data_pointer(i); for (t = 0; t < NUM_IRQ_TYPES; t++) - sigio_reg_handler(i, irq_entry, t, regs); + sigio_reg_handler(i, irq_entry, t, regs, + timetravel_handlers_only); } } - if (!irqs_suspended) + if (!timetravel_handlers_only) free_irqs(); } +void sigio_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs) +{ + _sigio_handler(regs, irqs_suspended); +} + static struct irq_entry *get_irq_entry_by_fd(int fd) { struct irq_entry *walk; @@ -467,6 +485,11 @@ int um_request_irq_tt(int irq, int fd, enum um_irq_type type, devname, dev_id, timetravel_handler); } EXPORT_SYMBOL(um_request_irq_tt); + +void sigio_run_timetravel_handlers(void) +{ + _sigio_handler(NULL, true); +} #endif #ifdef CONFIG_PM_SLEEP |