diff options
| author | Mike Larkin <mlarkin@cvs.openbsd.org> | 2016-04-11 06:58:35 +0000 |
|---|---|---|
| committer | Mike Larkin <mlarkin@cvs.openbsd.org> | 2016-04-11 06:58:35 +0000 |
| commit | 44878712f9c04ed115482e94d50c92e2d990dc2a (patch) | |
| tree | 8a2385931e32d2a7ecb8236b6b0bac1ece56a16f /sys/arch/amd64 | |
| parent | 5ee3bdf49fa96f6b4b213b219640241dbe04a9f7 (diff) | |
Clarify some comments
Diffstat (limited to 'sys/arch/amd64')
| -rw-r--r-- | sys/arch/amd64/amd64/vmm.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/sys/arch/amd64/amd64/vmm.c b/sys/arch/amd64/amd64/vmm.c index 6c1c39486c0..464edadb9b1 100644 --- a/sys/arch/amd64/amd64/vmm.c +++ b/sys/arch/amd64/amd64/vmm.c @@ -1,4 +1,4 @@ -/* $OpenBSD: vmm.c,v 1.48 2016/04/06 06:15:06 mlarkin Exp $ */ +/* $OpenBSD: vmm.c,v 1.49 2016/04/11 06:58:34 mlarkin Exp $ */ /* * Copyright (c) 2014 Mike Larkin <mlarkin@openbsd.org> * @@ -2700,6 +2700,11 @@ vm_run(struct vm_run_params *vrp) break; } + /* + * Attempt to locate the requested VCPU. If found, attempt to + * to transition from VCPU_STATE_STOPPED -> VCPU_STATE_RUNNING. + * Failure to make the transition indicates the VCPU is busy. + */ if (vm != NULL) { rw_enter_read(&vm->vm_vcpu_lock); SLIST_FOREACH(vcpu, &vm->vm_vcpu_list, vc_vcpu_link) { @@ -2731,7 +2736,9 @@ vm_run(struct vm_run_params *vrp) /* * We may be returning from userland helping us from the last exit. - * If so (vrp_continue == 1), copy in the exit data from vmd. + * If so (vrp_continue == 1), copy in the exit data from vmd. The + * exit data will be consumed before the next entry (this typically + * comprises VCPU register changes as the result of vmd(8)'s actions). */ if (vrp->vrp_continue) { if (copyin(vrp->vrp_exit, &vcpu->vc_exit, |