diff options
| author | David Hildenbrand <david@redhat.com> | 2017-11-16 18:05:26 +0100 |
|---|---|---|
| committer | Cornelia Huck <cohuck@redhat.com> | 2017-11-20 09:31:46 +0100 |
| commit | 7337c6eb98786372cdbfe7ebe7affbd166fdc7ca (patch) | |
| tree | 92a93bff6e05ba66bd574d7744ed938fdc740feb /target/s390x | |
| parent | dc0bbef5e6049920873204d35cd27172b65d204f (diff) | |
s390x/tcg: fix DIAG 308 with > 1 VCPU (MTTCG)
Currently, multi threaded TCG with > 1 VCPU gets stuck during IPL, when
the bios tries to switch to the loaded kernel via DIAG 308.
As run_on_cpu() is used, we run into a deadlock after handling the reset.
We need the iolock (just like KVM).
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20171116170526.12643-4-david@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Diffstat (limited to 'target/s390x')
| -rw-r--r-- | target/s390x/misc_helper.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/target/s390x/misc_helper.c b/target/s390x/misc_helper.c index 4afd90b969..d272851e1c 100644 --- a/target/s390x/misc_helper.c +++ b/target/s390x/misc_helper.c @@ -103,7 +103,9 @@ void HELPER(diag)(CPUS390XState *env, uint32_t r1, uint32_t r3, uint32_t num) break; case 0x308: /* ipl */ + qemu_mutex_lock_iothread(); handle_diag_308(env, r1, r3); + qemu_mutex_unlock_iothread(); r = 0; break; case 0x288: |