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lguest: per-vcpu lguest timers

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Here, I introduce per-vcpu timers. With this, we can have
local expiries, needed for accounting time in smp guests

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Glauber de Oliveira Costa
2008-01-07 11:05:28 -02:00
committed by Rusty Russell
parent 73044f05a4
commit ad8d8f3bc6
4 changed files with 21 additions and 21 deletions
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20
drivers/lguest/interrupts_and_traps.c
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@@ -470,13 +470,13 @@ void copy_traps(const struct lguest *lg, struct desc_struct *idt,
* infrastructure to set a callback at that time.
*
* 0 means "turn off the clock". */
void guest_set_clockevent(struct lguest *lg, unsigned long delta)
void guest_set_clockevent(struct lg_cpu *cpu, unsigned long delta)
{
ktime_t expires;
if (unlikely(delta == 0)) {
/* Clock event device is shutting down. */
hrtimer_cancel(&lg->hrt);
hrtimer_cancel(&cpu->hrt);
return;
}
@@ -484,25 +484,25 @@ void guest_set_clockevent(struct lguest *lg, unsigned long delta)
* all the time between now and the timer interrupt it asked for. This
* is almost always the right thing to do. */
expires = ktime_add_ns(ktime_get_real(), delta);
hrtimer_start(&lg->hrt, expires, HRTIMER_MODE_ABS);
hrtimer_start(&cpu->hrt, expires, HRTIMER_MODE_ABS);
}
/* This is the function called when the Guest's timer expires. */
static enum hrtimer_restart clockdev_fn(struct hrtimer *timer)
{
struct lguest *lg = container_of(timer, struct lguest, hrt);
struct lg_cpu *cpu = container_of(timer, struct lg_cpu, hrt);
/* Remember the first interrupt is the timer interrupt. */
set_bit(0, lg->irqs_pending);
set_bit(0, cpu->lg->irqs_pending);
/* If the Guest is actually stopped, we need to wake it up. */
if (lg->halted)
wake_up_process(lg->tsk);
if (cpu->lg->halted)
wake_up_process(cpu->lg->tsk);
return HRTIMER_NORESTART;
}
/* This sets up the timer for this Guest. */
void init_clockdev(struct lguest *lg)
void init_clockdev(struct lg_cpu *cpu)
{
hrtimer_init(&lg->hrt, CLOCK_REALTIME, HRTIMER_MODE_ABS);
lg->hrt.function = clockdev_fn;
hrtimer_init(&cpu->hrt, CLOCK_REALTIME, HRTIMER_MODE_ABS);
cpu->hrt.function = clockdev_fn;
}