From a6cc3108567e0adc06c4a8031186f84ad1e1e194 Mon Sep 17 00:00:00 2001 From: David Hildenbrand Date: Fri, 6 Jun 2014 10:25:09 +0200 Subject: [PATCH] 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 Acked-by: Cornelia Huck Signed-off-by: Christian Borntraeger --- arch/s390/kvm/sigp.c | 25 ++++++++++++++++++------- 1 file 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++;