s390x: fix smp support for kvm

Submitted by Christian Borntraeger on May 5, 2011, 7:29 a.m.


Message ID 4DC251F5.1000204@de.ibm.com
State New
Headers show

Commit Message

Christian Borntraeger May 5, 2011, 7:29 a.m.
Currently smp support for kvm does not work. Qemu does a kvm run even on
secondary CPUs which dont have a sane state (initial psw == 0)
triggering some program faults. Architecturally these cpus are in the stopped
state, so we should not do the kvm run ioctl. (these CPUs will be started
by a SIGP restart later during the boot process)

We need to tell the loop that this cpu should not run. Jan Kiszka pointed
out that kvm_arch_process_async_events is the right place to do.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>

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--- a/target-s390x/kvm.c
+++ b/target-s390x/kvm.c
@@ -172,7 +172,7 @@  void kvm_arch_post_run(CPUState *env, struct kvm_run *run)
 int kvm_arch_process_async_events(CPUState *env)
-    return 0;
+    return env->halted;
 void kvm_s390_interrupt_internal(CPUState *env, int type, uint32_t parm,