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[Qemu-devel] [PATCH 5/5] hpet: run on dedicate thread
From: |
Liu Ping Fan |
Subject: |
[Qemu-devel] [PATCH 5/5] hpet: run on dedicate thread |
Date: |
Thu, 12 Sep 2013 13:24:53 +0800 |
migration is not supported yet.
Signed-off-by: Liu Ping Fan <address@hidden>
---
hw/timer/hpet.c | 31 ++++++++++++++++++++++++++++++-
1 file changed, 30 insertions(+), 1 deletion(-)
diff --git a/hw/timer/hpet.c b/hw/timer/hpet.c
index ae54b87..8e32e36 100644
--- a/hw/timer/hpet.c
+++ b/hw/timer/hpet.c
@@ -91,6 +91,10 @@ typedef struct HPETState {
uint32_t intcap;
HPETTimer timer[HPET_MAX_TIMERS];
bool dedicate_mode;
+ AioContext *ctx;
+ bool created;
+ bool stop;
+ QemuThread t;
/* Memory-mapped, software visible registers */
uint64_t capability; /* capabilities */
@@ -702,6 +706,16 @@ static const MemoryRegionOps hpet_ram_ops = {
.endianness = DEVICE_NATIVE_ENDIAN,
};
+static void *hpet_work_thread(void *opaque)
+{
+ HPETState *hpet = opaque;
+
+ while (!hpet->stop) {
+ aio_poll(hpet->ctx, true);
+ }
+ return NULL;
+}
+
static void hpet_reset(DeviceState *d)
{
HPETState *s = HPET(d);
@@ -732,6 +746,11 @@ static void hpet_reset(DeviceState *d)
/* to document that the RTC lowers its output on reset as well */
s->rtc_irq_level = 0;
+ if (!s->created) {
+ s->created = true;
+ qemu_thread_create(&s->t, hpet_work_thread, s, QEMU_THREAD_JOINABLE);
+ }
+
}
static void hpet_handle_legacy_irq(void *opaque, int n, int level)
@@ -788,10 +807,20 @@ static void hpet_realize(DeviceState *dev, Error **errp)
} else if (s->num_timers > HPET_MAX_TIMERS) {
s->num_timers = HPET_MAX_TIMERS;
}
+ s->dedicate_mode = kvm_irqfds_enabled() ? true : false;
+ if (s->dedicate_mode) {
+ s->ctx = aio_context_new();
+ }
for (i = 0; i < HPET_MAX_TIMERS; i++) {
timer = &s->timer[i];
- timer->qemu_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, hpet_timer,
timer);
timer->tn = i;
+ if (s->dedicate_mode) {
+ timer->qemu_timer = aio_timer_new(s->ctx, QEMU_CLOCK_VIRTUAL,
+ SCALE_NS, hpet_timer, timer);
+ } else {
+ timer->qemu_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL,
+ hpet_timer, timer);
+ }
timer->state = s;
}
--
1.8.1.4