Keir,
smp save/restore has been reverted in the changeset 13499:
*****************************************
--- a/xen/common/domain.c Fri Jan 19 11:58:52 2007 +0000
+++ b/xen/common/domain.c Fri Jan 19 12:03:51 2007 +0000
@@ -506,14 +506,6 @@ int set_info_guest(struct domain *d,
 if ( rc == 0 )
 rc = arch_set_info_guest(v, c);
- /*XXX: hvm smp guest restore support */
- if ( rc == 0 &&
- v->vcpu_id != 0 &&
- is_hvm_vcpu(v) &&
- test_and_clear_bit(_VCPUF_down, &v->vcpu_flags) ) {
- vcpu_wake(v);
- }
-
 domain_unpause(d);
 xfree(c.nat);
******************************************
this code wake up all the aps like hvm_bringup_ap, since no IPI for ap when 
restore.
if it's slightly ugly, how about add a similar hypercall like xc_domain_resume?
thanks,
-- 
best rgds,
edwin
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