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| author | David Hildenbrand <dahi@linux.vnet.ibm.com> | 2014-06-06 10:25:09 +0200 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2014-10-28 13:09:14 +0100 |
| commit | a6cc3108567e0adc06c4a8031186f84ad1e1e194 (patch) | |
| tree | ec8594d77600ecb84dec4ed06e6c835702470f48 /arch/s390/kvm | |
| parent | KVM: s390: sigp: inject emergency calls in a separate function (diff) | |
| download | linux-a6cc3108567e0adc06c4a8031186f84ad1e1e194.tar.xz linux-a6cc3108567e0adc06c4a8031186f84ad1e1e194.zip | |
KVM: s390: sigp: split handling of SIGP STOP (AND STORE STATUS)
In preparation for further code changes (e.g. getting rid of action_flags),
this patch splits the handling of the two sigp orders SIGP STOP and SIGP STOP
AND STORE STATUS by introducing a separate handler function for SIGP STOP AND
STORE STATUS.
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'arch/s390/kvm')
| -rw-r--r-- | arch/s390/kvm/sigp.c | 25 |
1 files changed, 18 insertions, 7 deletions
diff --git a/arch/s390/kvm/sigp.c b/arch/s390/kvm/sigp.c index 1b330d4eb20b..f7cd3f774f25 100644 --- a/arch/s390/kvm/sigp.c +++ b/arch/s390/kvm/sigp.c @@ -147,15 +147,27 @@ out: return rc; } -static int __sigp_stop(struct kvm_vcpu *vcpu, struct kvm_vcpu *dst_vcpu, - int action) +static int __sigp_stop(struct kvm_vcpu *vcpu, struct kvm_vcpu *dst_vcpu) { int rc; - rc = __inject_sigp_stop(dst_vcpu, action); + rc = __inject_sigp_stop(dst_vcpu, ACTION_STOP_ON_STOP); VCPU_EVENT(vcpu, 4, "sent sigp stop to cpu %x", dst_vcpu->vcpu_id); - if ((action & ACTION_STORE_ON_STOP) != 0 && rc == -ESHUTDOWN) { + return rc; +} + +static int __sigp_stop_and_store_status(struct kvm_vcpu *vcpu, + struct kvm_vcpu *dst_vcpu, u64 *reg) +{ + int rc; + + rc = __inject_sigp_stop(dst_vcpu, ACTION_STOP_ON_STOP | + ACTION_STORE_ON_STOP); + VCPU_EVENT(vcpu, 4, "sent sigp stop and store status to cpu %x", + dst_vcpu->vcpu_id); + + if (rc == -ESHUTDOWN) { /* If the CPU has already been stopped, we still have * to save the status when doing stop-and-store. This * has to be done after unlocking all spinlocks. */ @@ -347,12 +359,11 @@ static int handle_sigp_dst(struct kvm_vcpu *vcpu, u8 order_code, break; case SIGP_STOP: vcpu->stat.instruction_sigp_stop++; - rc = __sigp_stop(vcpu, dst_vcpu, ACTION_STOP_ON_STOP); + rc = __sigp_stop(vcpu, dst_vcpu); break; case SIGP_STOP_AND_STORE_STATUS: vcpu->stat.instruction_sigp_stop_store_status++; - rc = __sigp_stop(vcpu, dst_vcpu, ACTION_STORE_ON_STOP | - ACTION_STOP_ON_STOP); + rc = __sigp_stop_and_store_status(vcpu, dst_vcpu, status_reg); break; case SIGP_STORE_STATUS_AT_ADDRESS: vcpu->stat.instruction_sigp_store_status++; |