s390x/kvm: deliver SIGP RESTART directly if stopped
According to the PoP, a restart irq has to be delivered "without first honoring any other pending interruptions", if a cpu is in the STOPPED state. While it is hard to implement this case in kvm, it can easily be handled in qemu. Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com> Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com> Message-Id: <1424783731-43426-10-git-send-email-jfrei@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
parent
3f10341ffb
commit
e3b7b57807
@ -1254,8 +1254,17 @@ static void sigp_restart(void *arg)
|
||||
.type = KVM_S390_RESTART,
|
||||
};
|
||||
|
||||
kvm_s390_vcpu_interrupt(si->cpu, &irq);
|
||||
s390_cpu_set_state(CPU_STATE_OPERATING, si->cpu);
|
||||
switch (s390_cpu_get_state(si->cpu)) {
|
||||
case CPU_STATE_STOPPED:
|
||||
/* the restart irq has to be delivered prior to any other pending irq */
|
||||
cpu_synchronize_state(CPU(si->cpu));
|
||||
do_restart_interrupt(&si->cpu->env);
|
||||
s390_cpu_set_state(CPU_STATE_OPERATING, si->cpu);
|
||||
break;
|
||||
case CPU_STATE_OPERATING:
|
||||
kvm_s390_vcpu_interrupt(si->cpu, &irq);
|
||||
break;
|
||||
}
|
||||
si->cc = SIGP_CC_ORDER_CODE_ACCEPTED;
|
||||
}
|
||||
|
||||
|
Loading…
Reference in New Issue
Block a user