qemu/hw/i386/xen
Eric Blake aedbe19297 shutdown: Prepare for use of an enum in reset/shutdown_request
We want to track why a guest was shutdown; in particular, being able
to tell the difference between a guest request (such as ACPI request)
and host request (such as SIGINT) will prove useful to libvirt.
Since all requests eventually end up changing shutdown_requested in
vl.c, the logical change is to make that value track the reason,
rather than its current 0/1 contents.

Since command-line options control whether a reset request is turned
into a shutdown request instead, the same treatment is given to
reset_requested.

This patch adds an internal enum ShutdownCause that describes reasons
that a shutdown can be requested, and changes qemu_system_reset() to
pass the reason through, although for now nothing is actually changed
with regards to what gets reported.  The enum could be exported via
QAPI at a later date, if deemed necessary, but for now, there has not
been a request to expose that much detail to end clients.

For the most part, we turn 0 into SHUTDOWN_CAUSE_NONE, and 1 into
SHUTDOWN_CAUSE_HOST_ERROR; the only specific case where we have enough
information right now to use a different value is when we are reacting
to a host signal.  It will take a further patch to edit all call-sites
that can trigger a reset or shutdown request to properly pass in any
other reasons; this patch includes TODOs to point such places out.

qemu_system_reset() trades its 'bool report' parameter for a
'ShutdownCause reason', with all non-zero values having the same
effect; this lets us get rid of the weird #defines for VMRESET_*
as synonyms for bools.

Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20170515214114.15442-3-eblake@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2017-05-23 13:28:17 +02:00
..
Makefile.objs move xen-mapcache.c to hw/i386/xen/ 2017-04-25 11:04:34 -07:00
trace-events move xen-mapcache.c to hw/i386/xen/ 2017-04-25 11:04:34 -07:00
xen_apic.c apic: add send_msi() to APICCommonClass 2016-10-17 15:44:49 -02:00
xen_platform.c xen: create wrappers for all other uses of xc_hvm_XXX() functions 2017-03-22 11:47:39 -07:00
xen_pvdevice.c include/qemu/osdep.h: Don't include qapi/error.h 2016-03-22 22:20:15 +01:00
xen-hvm.c shutdown: Prepare for use of an enum in reset/shutdown_request 2017-05-23 13:28:17 +02:00
xen-mapcache.c xen/mapcache: store dma information in revmapcache entries for debugging 2017-05-16 11:49:09 -07:00