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-rw-r--r--arch/um/kernel/process.c8
-rw-r--r--arch/um/kernel/skas/clone.c6
-rw-r--r--arch/um/kernel/skas/mmu.c3
-rw-r--r--arch/um/kernel/time.c73
4 files changed, 56 insertions, 34 deletions
diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c
index a6d9226..48af59a 100644
--- a/arch/um/kernel/process.c
+++ b/arch/um/kernel/process.c
@@ -1,4 +1,6 @@
/*
+ * Copyright (C) 2015 Anton Ivanov (aivanov@{brocade.com,kot-begemot.co.uk})
+ * Copyright (C) 2015 Thomas Meyer (thomas@m3y3r.de)
* Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Copyright 2003 PathScale, Inc.
* Licensed under the GPL
@@ -27,6 +29,7 @@
#include <kern_util.h>
#include <os.h>
#include <skas.h>
+#include <timer-internal.h>
/*
* This is a per-cpu array. A processor only modifies its entry and it only
@@ -203,11 +206,8 @@ void initial_thread_cb(void (*proc)(void *), void *arg)
void arch_cpu_idle(void)
{
- unsigned long long nsecs;
-
cpu_tasks[current_thread_info()->cpu].pid = os_getpid();
- nsecs = disable_timer();
- idle_sleep(nsecs);
+ os_idle_sleep(UM_NSEC_PER_SEC);
local_irq_enable();
}
diff --git a/arch/um/kernel/skas/clone.c b/arch/um/kernel/skas/clone.c
index 289771d..0f25d41 100644
--- a/arch/um/kernel/skas/clone.c
+++ b/arch/um/kernel/skas/clone.c
@@ -1,4 +1,5 @@
/*
+ * Copyright (C) 2015 Thomas Meyer (thomas@m3y3r.de)
* Copyright (C) 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
@@ -35,11 +36,6 @@ stub_clone_handler(void)
if (err)
goto out;
- err = stub_syscall3(__NR_setitimer, ITIMER_VIRTUAL,
- (long) &data->timer, 0);
- if (err)
- goto out;
-
remap_stack(data->fd, data->offset);
goto done;
diff --git a/arch/um/kernel/skas/mmu.c b/arch/um/kernel/skas/mmu.c
index fda1deb..9591a66 100644
--- a/arch/um/kernel/skas/mmu.c
+++ b/arch/um/kernel/skas/mmu.c
@@ -1,4 +1,5 @@
/*
+ * Copyright (C) 2015 Thomas Meyer (thomas@m3y3r.de)
* Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
@@ -61,10 +62,12 @@ int init_new_context(struct task_struct *task, struct mm_struct *mm)
if (current->mm != NULL && current->mm != &init_mm)
from_mm = &current->mm->context;
+ block_signals();
if (from_mm)
to_mm->id.u.pid = copy_context_skas0(stack,
from_mm->id.u.pid);
else to_mm->id.u.pid = start_userspace(stack);
+ unblock_signals();
if (to_mm->id.u.pid < 0) {
ret = to_mm->id.u.pid;
diff --git a/arch/um/kernel/time.c b/arch/um/kernel/time.c
index 5af441e..25c2366 100644
--- a/arch/um/kernel/time.c
+++ b/arch/um/kernel/time.c
@@ -1,4 +1,7 @@
/*
+ * Copyright (C) 2015 Anton Ivanov (aivanov@{brocade.com,kot-begemot.co.uk})
+ * Copyright (C) 2015 Thomas Meyer (thomas@m3y3r.de)
+ * Copyright (C) 2012-2014 Cisco Systems
* Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
* Licensed under the GPL
*/
@@ -7,11 +10,15 @@
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/jiffies.h>
+#include <linux/mm.h>
+#include <linux/sched.h>
+#include <linux/spinlock.h>
#include <linux/threads.h>
#include <asm/irq.h>
#include <asm/param.h>
#include <kern_util.h>
#include <os.h>
+#include <timer-internal.h>
void timer_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs)
{
@@ -24,81 +31,97 @@ void timer_handler(int sig, struct siginfo *unused_si, struct uml_pt_regs *regs)
static int itimer_shutdown(struct clock_event_device *evt)
{
- disable_timer();
+ os_timer_disable();
return 0;
}
static int itimer_set_periodic(struct clock_event_device *evt)
{
- set_interval();
+ os_timer_set_interval(NULL, NULL);
return 0;
}
static int itimer_next_event(unsigned long delta,
struct clock_event_device *evt)
{
- return timer_one_shot(delta + 1);
+ return os_timer_one_shot(delta);
}
-static struct clock_event_device itimer_clockevent = {
- .name = "itimer",
+static int itimer_one_shot(struct clock_event_device *evt)
+{
+ os_timer_one_shot(1);
+ return 0;
+}
+
+static struct clock_event_device timer_clockevent = {
+ .name = "posix-timer",
.rating = 250,
.cpumask = cpu_all_mask,
.features = CLOCK_EVT_FEAT_PERIODIC |
CLOCK_EVT_FEAT_ONESHOT,
.set_state_shutdown = itimer_shutdown,
.set_state_periodic = itimer_set_periodic,
- .set_state_oneshot = itimer_shutdown,
+ .set_state_oneshot = itimer_one_shot,
.set_next_event = itimer_next_event,
- .shift = 32,
+ .shift = 0,
+ .max_delta_ns = 0xffffffff,
+ .min_delta_ns = TIMER_MIN_DELTA, //microsecond resolution should be enough for anyone, same as 640K RAM
.irq = 0,
+ .mult = 1,
};
static irqreturn_t um_timer(int irq, void *dev)
{
- (*itimer_clockevent.event_handler)(&itimer_clockevent);
+ if (get_current()->mm != NULL)
+ {
+ /* userspace - relay signal, results in correct userspace timers */
+ os_alarm_process(get_current()->mm->context.id.u.pid);
+ }
+
+ (*timer_clockevent.event_handler)(&timer_clockevent);
return IRQ_HANDLED;
}
-static cycle_t itimer_read(struct clocksource *cs)
+static cycle_t timer_read(struct clocksource *cs)
{
- return os_nsecs() / 1000;
+ return os_nsecs() / TIMER_MULTIPLIER;
}
-static struct clocksource itimer_clocksource = {
- .name = "itimer",
+static struct clocksource timer_clocksource = {
+ .name = "timer",
.rating = 300,
- .read = itimer_read,
+ .read = timer_read,
.mask = CLOCKSOURCE_MASK(64),
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
-static void __init setup_itimer(void)
+static void __init timer_setup(void)
{
int err;
- err = request_irq(TIMER_IRQ, um_timer, 0, "timer", NULL);
+ err = request_irq(TIMER_IRQ, um_timer, IRQF_TIMER, "hr timer", NULL);
if (err != 0)
printk(KERN_ERR "register_timer : request_irq failed - "
"errno = %d\n", -err);
- itimer_clockevent.mult = div_sc(HZ, NSEC_PER_SEC, 32);
- itimer_clockevent.max_delta_ns =
- clockevent_delta2ns(60 * HZ, &itimer_clockevent);
- itimer_clockevent.min_delta_ns =
- clockevent_delta2ns(1, &itimer_clockevent);
- err = clocksource_register_hz(&itimer_clocksource, USEC_PER_SEC);
+ err = os_timer_create(NULL);
+ if (err != 0) {
+ printk(KERN_ERR "creation of timer failed - errno = %d\n", -err);
+ return;
+ }
+
+ err = clocksource_register_hz(&timer_clocksource, NSEC_PER_SEC/TIMER_MULTIPLIER);
if (err) {
printk(KERN_ERR "clocksource_register_hz returned %d\n", err);
return;
}
- clockevents_register_device(&itimer_clockevent);
+ clockevents_register_device(&timer_clockevent);
}
void read_persistent_clock(struct timespec *ts)
{
- long long nsecs = os_nsecs();
+ long long nsecs = os_persistent_clock_emulation();
set_normalized_timespec(ts, nsecs / NSEC_PER_SEC,
nsecs % NSEC_PER_SEC);
@@ -106,6 +129,6 @@ void read_persistent_clock(struct timespec *ts)
void __init time_init(void)
{
- timer_init();
- late_time_init = setup_itimer;
+ timer_set_signal_handler();
+ late_time_init = timer_setup;
}
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