* [PATCH 0/2] docs/microvm.rst: fix alignment and explain shut down @ 2019-11-15 16:13 Sergio Lopez 2019-11-15 16:13 ` [PATCH 1/2] docs/microvm.rst: fix alignment in "Limitations" Sergio Lopez 2019-11-15 16:13 ` [PATCH 2/2] docs/microvm.rst: add instructions for shutting down the guest Sergio Lopez 0 siblings, 2 replies; 4+ messages in thread From: Sergio Lopez @ 2019-11-15 16:13 UTC (permalink / raw) To: qemu-devel; +Cc: Paolo Bonzini, Sergio Lopez Fix the alignment in the "Limitations" section and include an explanation about the particularities of the microvm machine type when it comes to triggering a guest initiated shut down. Sergio Lopez (2): docs/microvm.rst: fix alignment in "Limitations" docs/microvm.rst: add instructions for shutting down the guest docs/microvm.rst | 27 ++++++++++++++++++++++++--- 1 file changed, 24 insertions(+), 3 deletions(-) -- 2.23.0 ^ permalink raw reply [flat|nested] 4+ messages in thread
* [PATCH 1/2] docs/microvm.rst: fix alignment in "Limitations" 2019-11-15 16:13 [PATCH 0/2] docs/microvm.rst: fix alignment and explain shut down Sergio Lopez @ 2019-11-15 16:13 ` Sergio Lopez 2019-11-15 16:13 ` [PATCH 2/2] docs/microvm.rst: add instructions for shutting down the guest Sergio Lopez 1 sibling, 0 replies; 4+ messages in thread From: Sergio Lopez @ 2019-11-15 16:13 UTC (permalink / raw) To: qemu-devel; +Cc: Paolo Bonzini, Sergio Lopez Fix the alignment of the items in the "Limitations" section. Signed-off-by: Sergio Lopez <slp@redhat.com> --- docs/microvm.rst | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/docs/microvm.rst b/docs/microvm.rst index aae811a922..4cf84746b9 100644 --- a/docs/microvm.rst +++ b/docs/microvm.rst @@ -33,9 +33,9 @@ Limitations Currently, microvm does *not* support the following features: - - PCI-only devices. - - Hotplug of any kind. - - Live migration across QEMU versions. +- PCI-only devices. +- Hotplug of any kind. +- Live migration across QEMU versions. Using the microvm machine type -- 2.23.0 ^ permalink raw reply related [flat|nested] 4+ messages in thread
* [PATCH 2/2] docs/microvm.rst: add instructions for shutting down the guest 2019-11-15 16:13 [PATCH 0/2] docs/microvm.rst: fix alignment and explain shut down Sergio Lopez 2019-11-15 16:13 ` [PATCH 1/2] docs/microvm.rst: fix alignment in "Limitations" Sergio Lopez @ 2019-11-15 16:13 ` Sergio Lopez 2019-11-15 16:26 ` Paolo Bonzini 1 sibling, 1 reply; 4+ messages in thread From: Sergio Lopez @ 2019-11-15 16:13 UTC (permalink / raw) To: qemu-devel; +Cc: Paolo Bonzini, Sergio Lopez Add a new section explaining the particularities of the microvm machine type for triggering a guest-initiated shut down. Signed-off-by: Sergio Lopez <slp@redhat.com> --- docs/microvm.rst | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/docs/microvm.rst b/docs/microvm.rst index 4cf84746b9..fcf41fc1f6 100644 --- a/docs/microvm.rst +++ b/docs/microvm.rst @@ -106,3 +106,24 @@ disabled:: -device virtio-blk-device,drive=test \ -netdev tap,id=tap0,script=no,downscript=no \ -device virtio-net-device,netdev=tap0 + + +Triggering a guest-initiated shut down +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +As the microvm machine type includes just a small set of system +devices, some x86 mechanisms for rebooting or shutting down the +system, like sending a key sequence to the keyboard or writing to an +ACPI register, doesn't have any effect in the VM. + +The recommended way to trigger a guest-initiated shut down is by +generating a ``triple-fault``, which will cause the VM to initiate a +reboot. Additionally, if the ``-no-reboot`` argument is present in the +command line, QEMU will detect this event and terminate its own +execution gracefully. + +Linux does support this mechanism, but by default will only be used +after other options have been tried and failed, causing the reboot to +be delayed by a small number of seconds. It's possible to instruct it +to try the triple-fault mechanism first, by adding ``reboot=t`` to the +kernel's command line. -- 2.23.0 ^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH 2/2] docs/microvm.rst: add instructions for shutting down the guest 2019-11-15 16:13 ` [PATCH 2/2] docs/microvm.rst: add instructions for shutting down the guest Sergio Lopez @ 2019-11-15 16:26 ` Paolo Bonzini 0 siblings, 0 replies; 4+ messages in thread From: Paolo Bonzini @ 2019-11-15 16:26 UTC (permalink / raw) To: Sergio Lopez, qemu-devel On 15/11/19 17:13, Sergio Lopez wrote: > Add a new section explaining the particularities of the microvm > machine type for triggering a guest-initiated shut down. > > Signed-off-by: Sergio Lopez <slp@redhat.com> > --- > docs/microvm.rst | 21 +++++++++++++++++++++ > 1 file changed, 21 insertions(+) > > diff --git a/docs/microvm.rst b/docs/microvm.rst > index 4cf84746b9..fcf41fc1f6 100644 > --- a/docs/microvm.rst > +++ b/docs/microvm.rst > @@ -106,3 +106,24 @@ disabled:: > -device virtio-blk-device,drive=test \ > -netdev tap,id=tap0,script=no,downscript=no \ > -device virtio-net-device,netdev=tap0 > + > + > +Triggering a guest-initiated shut down > +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > + > +As the microvm machine type includes just a small set of system > +devices, some x86 mechanisms for rebooting or shutting down the > +system, like sending a key sequence to the keyboard or writing to an > +ACPI register, doesn't have any effect in the VM. > + > +The recommended way to trigger a guest-initiated shut down is by > +generating a ``triple-fault``, which will cause the VM to initiate a > +reboot. Additionally, if the ``-no-reboot`` argument is present in the > +command line, QEMU will detect this event and terminate its own > +execution gracefully. > + > +Linux does support this mechanism, but by default will only be used > +after other options have been tried and failed, causing the reboot to > +be delayed by a small number of seconds. It's possible to instruct it > +to try the triple-fault mechanism first, by adding ``reboot=t`` to the > +kernel's command line. > Queued, thanks. Paolo ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2019-11-15 16:53 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2019-11-15 16:13 [PATCH 0/2] docs/microvm.rst: fix alignment and explain shut down Sergio Lopez 2019-11-15 16:13 ` [PATCH 1/2] docs/microvm.rst: fix alignment in "Limitations" Sergio Lopez 2019-11-15 16:13 ` [PATCH 2/2] docs/microvm.rst: add instructions for shutting down the guest Sergio Lopez 2019-11-15 16:26 ` Paolo Bonzini
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