Commit 27a83f8e authored by David Gibson's avatar David Gibson
Browse files

monitor: fix crash for platforms without a CPU 0 



Now that we allow CPU hot unplug on a few platforms, we can end up in a
situation where we don't have a CPU with index 0.  Or at least we could,
if we didn't have code to explicitly prohibit unplug of CPU 0.

Longer term we want to allow CPU 0 unplug, this patch is an early step in
allowing this, by removing an assumption in the monitor code that CPU 0
always exists.

Signed-off-by: default avatarCédric Le Goater <clg@kaod.org>
[dwg: Rewrote commit message to better explain background]
Reviewed-by: default avatarIgor Mammedov <imammedo@redhat.com>
Reviewed-by: default avatarEduardo Habkost <ehabkost@redhat.com>
Reviewed-by: default avatarLuiz Capitulino <lcapitulino@redhat.com>
Signed-off-by: default avatarDavid Gibson <david@gibson.dropbear.id.au>
parent 58eb5308

monitor.c

+1 −1
Original line number Diff line number Diff line
@@ -1025,7 +1025,7 @@ int monitor_set_cpu(int cpu_index) 
CPUState *mon_get_cpu(void)

{

    if (!cur_mon->mon_cpu) {

        monitor_set_cpu(0);

        monitor_set_cpu(first_cpu->cpu_index);

    }

    cpu_synchronize_state(cur_mon->mon_cpu);

    return cur_mon->mon_cpu;