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Re: [Qemu-devel] [PATCH v5 2/4] shutdown: Prepare for use of an enum in
From: |
Eric Blake |
Subject: |
Re: [Qemu-devel] [PATCH v5 2/4] shutdown: Prepare for use of an enum in reset/shutdown_request |
Date: |
Fri, 28 Apr 2017 10:57:52 -0500 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.0 |
On 04/28/2017 10:27 AM, Dr. David Alan Gilbert wrote:
>>>> +# Enumeration of various causes for shutdown.
>>>> +#
>>>> +# @host-qmp: Reaction to a QMP command, such as 'quit'
>>>> +# @host-signal: Reaction to a signal, such as SIGINT
>>>> +# @host-ui: Reaction to a UI event, such as closing the window
>>>> +# @host-replay: The host is replaying an earlier shutdown event
>>>> +# @host-error: Qemu encountered an error that prevents further use of the
>>>> guest
>>>> +# @guest-shutdown: The guest requested a shutdown, such as via ACPI or
>>>> +# other hardware-specific action
>>>> +# @guest-reset: The guest requested a reset, and the command line
>>>> +# response to a reset is to instead trigger a shutdown
>>>> +# @guest-panic: The guest panicked, and the command line response to
>>>> +# a panic is to trigger a shutdown
>>>
> At a higher level, using your tags, I'm not sure where a reset triggered
> by a fault detected by the hypervisor lives - e.g. an x86 triple fault
> where the guest screws up so badly that it just gets reset. Is
> that a guest-reset or a guest-panic or what - neither case
> was actually asked for by the guest itself.
Wouldn't that be host-error (qemu detected an error that prevents
further execution of the guest without a reset - and a triple fault
seems to fall into the category of the guest getting itself wedged
rather than actually trying to reset)? Except patch 3 only used
SHUTDOWN_TYPE_HOST_ERROR in the xen portion of the patch.
So if any x86 expert has an opinion on where triple-fault handling is
emulated, and what category should be used there, I'm welcome to
tweaking this series.
--
Eric Blake, Principal Software Engineer
Red Hat, Inc. +1-919-301-3266
Virtualization: qemu.org | libvirt.org
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- [Qemu-devel] [PATCH v5 0/4] event: Add source information to SHUTDOWN, Eric Blake, 2017/04/27
- [Qemu-devel] [PATCH v5 1/4] shutdown: Simplify shutdown_signal, Eric Blake, 2017/04/27
- [Qemu-devel] [PATCH v5 2/4] shutdown: Prepare for use of an enum in reset/shutdown_request, Eric Blake, 2017/04/27
- Re: [Qemu-devel] [PATCH v5 2/4] shutdown: Prepare for use of an enum in reset/shutdown_request, Dr. David Alan Gilbert, 2017/04/28
- Re: [Qemu-devel] [PATCH v5 2/4] shutdown: Prepare for use of an enum in reset/shutdown_request, Eric Blake, 2017/04/28
- Re: [Qemu-devel] [PATCH v5 2/4] shutdown: Prepare for use of an enum in reset/shutdown_request, Dr. David Alan Gilbert, 2017/04/28
- Re: [Qemu-devel] [PATCH v5 2/4] shutdown: Prepare for use of an enum in reset/shutdown_request,
Eric Blake <=
- Re: [Qemu-devel] [PATCH v5 2/4] shutdown: Prepare for use of an enum in reset/shutdown_request, Dr. David Alan Gilbert, 2017/04/28
- Re: [Qemu-devel] [PATCH v5 2/4] shutdown: Prepare for use of an enum in reset/shutdown_request, Eric Blake, 2017/04/28
- Re: [Qemu-devel] [PATCH v5 2/4] shutdown: Prepare for use of an enum in reset/shutdown_request, Dr. David Alan Gilbert, 2017/04/28
- Re: [Qemu-devel] [PATCH v5 2/4] shutdown: Prepare for use of an enum in reset/shutdown_request, Markus Armbruster, 2017/04/28
Re: [Qemu-devel] [PATCH v5 2/4] shutdown: Prepare for use of an enum in reset/shutdown_request, Markus Armbruster, 2017/04/28
[Qemu-devel] [PATCH v5 4/4] RFC: shutdown: Expose full ShutdownCause across QMP, Eric Blake, 2017/04/27
[Qemu-devel] [PATCH v5 3/4] shutdown: Add source information to SHUTDOWN and RESET, Eric Blake, 2017/04/27