[qemu-s390x] [PULL 08/46] s390x/tcg: STOPPED cpus can never wake up

[Cornelia Huck]

From: David Hildenbrand <address@hidden>

Interrupts can't wake such CPUs up. SIGP from other CPUs has to be used
to toggle the state.

Reviewed-by: Richard Henderson <address@hidden>
Signed-off-by: David Hildenbrand <address@hidden>
Message-Id: <address@hidden>
Signed-off-by: Cornelia Huck <address@hidden>
---
 target/s390x/cpu.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/target/s390x/cpu.c b/target/s390x/cpu.c
index b0517475fa..a21d5519c1 100644
--- a/target/s390x/cpu.c
+++ b/target/s390x/cpu.c
@@ -57,6 +57,12 @@ static bool s390_cpu_has_work(CPUState *cs)
 {
     S390CPU *cpu = S390_CPU(cs);
 
+    /* STOPPED cpus can never wake up */
+    if (s390_cpu_get_state(cpu) != CPU_STATE_LOAD &&
+        s390_cpu_get_state(cpu) != CPU_STATE_OPERATING) {
+        return false;
+    }
+
     if (!(cs->interrupt_request & CPU_INTERRUPT_HARD)) {
         return false;
     }
-- 
2.13.6