@@ -138,6 +138,22 @@ bool __read_mostly vmtrace_available;
bool __read_mostly vpmu_is_available;
+static DECLARE_BITMAP(dom_state_changed, DOMID_MASK + 1);
+
+void domain_reset_states(void)
+{
+ struct domain *d;
+
+ bitmap_zero(dom_state_changed, DOMID_MASK + 1);
+
+ rcu_read_lock(&domlist_read_lock);
+
+ for_each_domain ( d )
+ set_bit(d->domain_id, dom_state_changed);
+
+ rcu_read_unlock(&domlist_read_lock);
+}
+
static void __domain_finalise_shutdown(struct domain *d)
{
struct vcpu *v;
@@ -152,6 +168,7 @@ static void __domain_finalise_shutdown(struct domain *d)
return;
d->is_shut_down = 1;
+ set_bit(d->domain_id, dom_state_changed);
if ( (d->shutdown_code == SHUTDOWN_suspend) && d->suspend_evtchn )
evtchn_send(d, d->suspend_evtchn);
else
@@ -832,6 +849,7 @@ struct domain *domain_create(domid_t domid,
*/
domlist_insert(d);
+ set_bit(d->domain_id, dom_state_changed);
memcpy(d->handle, config->handle, sizeof(d->handle));
return d;
@@ -1097,6 +1115,7 @@ int domain_kill(struct domain *d)
/* Mem event cleanup has to go here because the rings
* have to be put before we call put_domain. */
vm_event_cleanup(d);
+ set_bit(d->domain_id, dom_state_changed);
put_domain(d);
send_global_virq(VIRQ_DOM_EXC);
/* fallthrough */
@@ -1286,6 +1305,8 @@ static void cf_check complete_domain_destroy(struct rcu_head *head)
xfree(d->vcpu);
+ set_bit(d->domain_id, dom_state_changed);
+
_domain_destroy(d);
send_global_virq(VIRQ_DOM_EXC);
@@ -1296,6 +1296,8 @@ long do_event_channel_op(int cmd, XEN_GUEST_HANDLE_PARAM(void) arg)
rc = evtchn_bind_virq(&bind_virq, 0);
if ( !rc && __copy_to_guest(arg, &bind_virq, 1) )
rc = -EFAULT; /* Cleaning up here would be a mess! */
+ if ( !rc && bind_virq.virq == VIRQ_DOM_EXC )
+ domain_reset_states();
break;
}
@@ -800,6 +800,8 @@ void domain_resume(struct domain *d);
int domain_soft_reset(struct domain *d, bool resuming);
+void domain_reset_states(void);
+
int vcpu_start_shutdown_deferral(struct vcpu *v);
void vcpu_end_shutdown_deferral(struct vcpu *v);
Add a bitmap with one bit per possible domid indicating the respective domain has changed its state (created, deleted, dying, crashed, shutdown). Registering the VIRQ_DOM_EXC event will result in setting the bits for all existing domains and resetting all other bits. Resetting a bit will be done in a future patch. This information is needed for Xenstore to keep track of all domains. Signed-off-by: Juergen Gross <jgross@suse.com> --- xen/common/domain.c | 21 +++++++++++++++++++++ xen/common/event_channel.c | 2 ++ xen/include/xen/sched.h | 2 ++ 3 files changed, 25 insertions(+)