[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH 1/2] qem-xen: add later wakeup logic when qemu wakeup
From 86ad3bb83a984ad7bbc00b81d6a0bfc1abc543ca Mon Sep 17 00:00:00 2001 From: Liu Jinsong <jinsong.liu@xxxxxxxxx> Date: Sun, 1 Sep 2013 23:39:14 +0800 Subject: [PATCH 1/2] qemu-xen: add later wakeup logic when qemu wakeup Currently HVM S3 has a bug coming from the difference between qemu-traditioanl and qemu-xen. For qemu-traditional, the way to resume from hvm s3 is via 'xl trigger' command. However, for qemu-xen, the way to resume from hvm s3 inherited from standard qemu, i.e. via QMP, and it doesn't work under Xen. The root cause is, for qemu-xen, 'xl trigger' command didn't reset devices, while QMP didn't unpause hvm domain though they did qemu system reset. We have two qemu-xen patches and one xl patch to fix the HVM S3 bug. This patch is the qemu-xen patch 1. It provides a later wakeup notifier and a register function, and notifies the later wakeup list when qemu wakup by 'xl trigger' command. Signed-off-by: Liu Jinsong <jinsong.liu@xxxxxxxxx> --- sysemu.h | 1 + vl.c | 8 ++++++++ 2 files changed, 9 insertions(+), 0 deletions(-) diff --git a/sysemu.h b/sysemu.h index b71f244..4dbcab7 100644 --- a/sysemu.h +++ b/sysemu.h @@ -49,6 +49,7 @@ void qemu_register_suspend_notifier(Notifier *notifier); void qemu_system_wakeup_request(WakeupReason reason); void qemu_system_wakeup_enable(WakeupReason reason, bool enabled); void qemu_register_wakeup_notifier(Notifier *notifier); +void qemu_register_later_wakeup_notifier(Notifier *notifier); void qemu_system_shutdown_request(void); void qemu_system_powerdown_request(void); void qemu_register_powerdown_notifier(Notifier *notifier); diff --git a/vl.c b/vl.c index 5314f55..1c4842d 100644 --- a/vl.c +++ b/vl.c @@ -1478,6 +1478,8 @@ static NotifierList suspend_notifiers = NOTIFIER_LIST_INITIALIZER(suspend_notifiers); static NotifierList wakeup_notifiers = NOTIFIER_LIST_INITIALIZER(wakeup_notifiers); +static NotifierList later_wakeup_notifiers = + NOTIFIER_LIST_INITIALIZER(later_wakeup_notifiers); static uint32_t wakeup_reason_mask = ~0; static RunState vmstop_requested = RUN_STATE_MAX; @@ -1668,6 +1670,11 @@ void qemu_register_wakeup_notifier(Notifier *notifier) notifier_list_add(&wakeup_notifiers, notifier); } +void qemu_register_later_wakeup_notifier(Notifier *notifier) +{ + notifier_list_add(&later_wakeup_notifiers, notifier); +} + void qemu_system_killed(int signal, pid_t pid) { shutdown_signal = signal; @@ -1744,6 +1751,7 @@ static bool main_loop_should_exit(void) cpu_synchronize_all_states(); qemu_system_reset(VMRESET_SILENT); resume_all_vcpus(); + notifier_list_notify(&later_wakeup_notifiers, NULL); monitor_protocol_event(QEVENT_WAKEUP, NULL); } if (qemu_powerdown_requested()) { -- 1.7.1 Attachment:
0001-Add-later-wakeup-logic-when-qemu-wakeup.patch _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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