This patch adds a new per-vCPU tasklet to wakeup the blocked
vCPU. It can be used in the case vcpu_unblock cannot be called
directly. This tasklet will be used in later patch in this
series.
Signed-off-by: Feng Wu <feng...@intel.com>
---
xen/common/domain.c | 11 +++++++++++
xen/include/xen/sched.h | 3 +++
2 files changed, 14 insertions(+)
diff --git a/xen/common/domain.c b/xen/common/domain.c
index 6803c4d..95e2a10 100644
--- a/xen/common/domain.c
+++ b/xen/common/domain.c
@@ -109,6 +109,13 @@ static void vcpu_check_shutdown(struct vcpu *v)
spin_unlock(&d->shutdown_lock);
}
+static void vcpu_wakeup_tasklet_handler(unsigned long arg)
+{
+ struct vcpu *v = (void *)arg;
+
+ vcpu_unblock(v);
+}
+
struct vcpu *alloc_vcpu(
struct domain *d, unsigned int vcpu_id, unsigned int cpu_id)
{
@@ -126,6 +133,9 @@ struct vcpu *alloc_vcpu(
tasklet_init(&v->continue_hypercall_tasklet, NULL, 0);
+ tasklet_init(&v->vcpu_wakeup_tasklet, vcpu_wakeup_tasklet_handler,
+ (unsigned long)v);
+
if ( !zalloc_cpumask_var(&v->cpu_hard_affinity) ||
!zalloc_cpumask_var(&v->cpu_hard_affinity_tmp) ||
!zalloc_cpumask_var(&v->cpu_hard_affinity_saved) ||
@@ -785,6 +795,7 @@ static void complete_domain_destroy(struct rcu_head *head)
if ( (v = d->vcpu[i]) == NULL )
continue;
tasklet_kill(&v->continue_hypercall_tasklet);
+ tasklet_kill(&v->vcpu_wakeup_tasklet);
vcpu_destroy(v);
sched_destroy_vcpu(v);
destroy_waitqueue_vcpu(v);
diff --git a/xen/include/xen/sched.h b/xen/include/xen/sched.h
index 80c6f62..fd9e01e 100644
--- a/xen/include/xen/sched.h
+++ b/xen/include/xen/sched.h
@@ -239,6 +239,9 @@ struct vcpu
/* Tasklet for continue_hypercall_on_cpu(). */
struct tasklet continue_hypercall_tasklet;
+ /* Tasklet for wakeup_blocked_vcpu(). */
+ struct tasklet vcpu_wakeup_tasklet;
+
/* Multicall information. */
struct mc_state mc_state;
--
2.1.0
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