Author: neel
Date: Mon Mar 17 23:30:38 2014
New Revision: 263280
URL: http://svnweb.freebsd.org/changeset/base/263280
Log:
Notify vcpus participating in the rendezvous of the pending event to ensure
that they execute the rendezvous function as soon as possible.
Modified:
head/sys/amd64/vmm/vmm.c
Modified: head/sys/amd64/vmm/vmm.c
==============================================================================
--- head/sys/amd64/vmm/vmm.c Mon Mar 17 23:21:31 2014 (r263279)
+++ head/sys/amd64/vmm/vmm.c Mon Mar 17 23:30:38 2014 (r263280)
@@ -1657,6 +1657,8 @@ void
vm_smp_rendezvous(struct vm *vm, int vcpuid, cpuset_t dest,
vm_rendezvous_func_t func, void *arg)
{
+ int i;
+
/*
* Enforce that this function is called without any locks
*/
@@ -1687,6 +1689,15 @@ restart:
vm_set_rendezvous_func(vm, func);
mtx_unlock(&vm->rendezvous_mtx);
+ /*
+ * Wake up any sleeping vcpus and trigger a VM-exit in any running
+ * vcpus so they handle the rendezvous as soon as possible.
+ */
+ for (i = 0; i < VM_MAXCPU; i++) {
+ if (CPU_ISSET(i, &dest))
+ vcpu_notify_event(vm, i, false);
+ }
+
vm_handle_rendezvous(vm, vcpuid);
}
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