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| author | Jens Freimann <jfrei@linux.vnet.ibm.com> | 2012-02-06 10:59:03 +0100 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2012-03-08 13:10:14 +0100 |
| commit | 9e0d5473e2f0ba2d2fe9dab9408edef3060b710e (patch) | |
| tree | 3ca883cc0c44a68480f691e1c62e3a51f7732ce2 | |
| parent | KVM: s390: Sanitize fpc registers for KVM_SET_FPU (diff) | |
| download | linux-9e0d5473e2f0ba2d2fe9dab9408edef3060b710e.tar.xz linux-9e0d5473e2f0ba2d2fe9dab9408edef3060b710e.zip | |
KVM: s390: do store status after handling STOP_ON_STOP bit
In handle_stop() handle the stop bit before doing the store status as
described for "Stop and Store Status" in the Principles of Operation.
We have to give up the local_int.lock before calling kvm store status
since it calls gmap_fault() which might sleep. Since local_int.lock
only protects local_int.* and not guest memory we can give up the lock.
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
| -rw-r--r-- | arch/s390/kvm/intercept.c | 20 |
1 files changed, 12 insertions, 8 deletions
diff --git a/arch/s390/kvm/intercept.c b/arch/s390/kvm/intercept.c index 776ef83c2771..361456577c6f 100644 --- a/arch/s390/kvm/intercept.c +++ b/arch/s390/kvm/intercept.c @@ -133,13 +133,6 @@ static int handle_stop(struct kvm_vcpu *vcpu) vcpu->stat.exit_stop_request++; spin_lock_bh(&vcpu->arch.local_int.lock); - if (vcpu->arch.local_int.action_bits & ACTION_STORE_ON_STOP) { - vcpu->arch.local_int.action_bits &= ~ACTION_STORE_ON_STOP; - rc = kvm_s390_vcpu_store_status(vcpu, - KVM_S390_STORE_STATUS_NOADDR); - if (rc >= 0) - rc = -EOPNOTSUPP; - } if (vcpu->arch.local_int.action_bits & ACTION_RELOADVCPU_ON_STOP) { vcpu->arch.local_int.action_bits &= ~ACTION_RELOADVCPU_ON_STOP; @@ -155,7 +148,18 @@ static int handle_stop(struct kvm_vcpu *vcpu) rc = -EOPNOTSUPP; } - spin_unlock_bh(&vcpu->arch.local_int.lock); + if (vcpu->arch.local_int.action_bits & ACTION_STORE_ON_STOP) { + vcpu->arch.local_int.action_bits &= ~ACTION_STORE_ON_STOP; + /* store status must be called unlocked. Since local_int.lock + * only protects local_int.* and not guest memory we can give + * up the lock here */ + spin_unlock_bh(&vcpu->arch.local_int.lock); + rc = kvm_s390_vcpu_store_status(vcpu, + KVM_S390_STORE_STATUS_NOADDR); + if (rc >= 0) + rc = -EOPNOTSUPP; + } else + spin_unlock_bh(&vcpu->arch.local_int.lock); return rc; } |