From 7ec13c798a5792c70edbc088ac6aae07c85ee230 Mon Sep 17 00:00:00 2001 From: "Denis V. Lunev" Date: Sat, 13 Feb 2016 16:26:26 +0300 Subject: [PATCH] vl: change QEMU state machine for system reset This patch implements proposal from Paolo to handle system reset when the guest is not running. "After a reset, main_loop_should_exit should actually transition to VM_STATE_PRELAUNCH (*not* RUN_STATE_PAUSED) for *all* states except RUN_STATE_INMIGRATE, RUN_STATE_SAVE_VM (which I think cannot happen there) and (of course) RUN_STATE_RUNNING." Signed-off-by: Denis V. Lunev CC: Paolo Bonzini Message-Id: <1455369986-20353-1-git-send-email-den@openvz.org> Signed-off-by: Paolo Bonzini --- vl.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/vl.c b/vl.c index 175ebccb81..76dfb54bcf 100644 --- a/vl.c +++ b/vl.c @@ -579,6 +579,7 @@ static const RunStateTransition runstate_transitions_def[] = { /* from -> to */ { RUN_STATE_DEBUG, RUN_STATE_RUNNING }, { RUN_STATE_DEBUG, RUN_STATE_FINISH_MIGRATE }, + { RUN_STATE_DEBUG, RUN_STATE_PRELAUNCH }, { RUN_STATE_INMIGRATE, RUN_STATE_INTERNAL_ERROR }, { RUN_STATE_INMIGRATE, RUN_STATE_IO_ERROR }, @@ -592,15 +593,19 @@ static const RunStateTransition runstate_transitions_def[] = { { RUN_STATE_INTERNAL_ERROR, RUN_STATE_PAUSED }, { RUN_STATE_INTERNAL_ERROR, RUN_STATE_FINISH_MIGRATE }, + { RUN_STATE_INTERNAL_ERROR, RUN_STATE_PRELAUNCH }, { RUN_STATE_IO_ERROR, RUN_STATE_RUNNING }, { RUN_STATE_IO_ERROR, RUN_STATE_FINISH_MIGRATE }, + { RUN_STATE_IO_ERROR, RUN_STATE_PRELAUNCH }, { RUN_STATE_PAUSED, RUN_STATE_RUNNING }, { RUN_STATE_PAUSED, RUN_STATE_FINISH_MIGRATE }, + { RUN_STATE_PAUSED, RUN_STATE_PRELAUNCH }, { RUN_STATE_POSTMIGRATE, RUN_STATE_RUNNING }, { RUN_STATE_POSTMIGRATE, RUN_STATE_FINISH_MIGRATE }, + { RUN_STATE_POSTMIGRATE, RUN_STATE_PRELAUNCH }, { RUN_STATE_PRELAUNCH, RUN_STATE_RUNNING }, { RUN_STATE_PRELAUNCH, RUN_STATE_FINISH_MIGRATE }, @@ -608,8 +613,10 @@ static const RunStateTransition runstate_transitions_def[] = { { RUN_STATE_FINISH_MIGRATE, RUN_STATE_RUNNING }, { RUN_STATE_FINISH_MIGRATE, RUN_STATE_POSTMIGRATE }, + { RUN_STATE_FINISH_MIGRATE, RUN_STATE_PRELAUNCH }, { RUN_STATE_RESTORE_VM, RUN_STATE_RUNNING }, + { RUN_STATE_RESTORE_VM, RUN_STATE_PRELAUNCH }, { RUN_STATE_RUNNING, RUN_STATE_DEBUG }, { RUN_STATE_RUNNING, RUN_STATE_INTERNAL_ERROR }, @@ -626,17 +633,21 @@ static const RunStateTransition runstate_transitions_def[] = { { RUN_STATE_SHUTDOWN, RUN_STATE_PAUSED }, { RUN_STATE_SHUTDOWN, RUN_STATE_FINISH_MIGRATE }, + { RUN_STATE_SHUTDOWN, RUN_STATE_PRELAUNCH }, { RUN_STATE_DEBUG, RUN_STATE_SUSPENDED }, { RUN_STATE_RUNNING, RUN_STATE_SUSPENDED }, { RUN_STATE_SUSPENDED, RUN_STATE_RUNNING }, { RUN_STATE_SUSPENDED, RUN_STATE_FINISH_MIGRATE }, + { RUN_STATE_SUSPENDED, RUN_STATE_PRELAUNCH }, { RUN_STATE_WATCHDOG, RUN_STATE_RUNNING }, { RUN_STATE_WATCHDOG, RUN_STATE_FINISH_MIGRATE }, + { RUN_STATE_WATCHDOG, RUN_STATE_PRELAUNCH }, { RUN_STATE_GUEST_PANICKED, RUN_STATE_RUNNING }, { RUN_STATE_GUEST_PANICKED, RUN_STATE_FINISH_MIGRATE }, + { RUN_STATE_GUEST_PANICKED, RUN_STATE_PRELAUNCH }, { RUN_STATE__MAX, RUN_STATE__MAX }, }; @@ -1881,8 +1892,9 @@ static bool main_loop_should_exit(void) cpu_synchronize_all_states(); qemu_system_reset(VMRESET_REPORT); resume_all_vcpus(); - if (runstate_needs_reset()) { - runstate_set(RUN_STATE_PAUSED); + if (!runstate_check(RUN_STATE_RUNNING) && + !runstate_check(RUN_STATE_INMIGRATE)) { + runstate_set(RUN_STATE_PRELAUNCH); } } if (qemu_wakeup_requested()) { -- 2.11.0