Commit 785dbef4 authored by Christian Borntraeger's avatar Christian Borntraeger

KVM: s390: optimize round trip time in request handling

The fast path for a sie exit is that no kvm reqest is pending.
Make an early check to skip all single bit checks.
Reviewed-by: default avatarDavid Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
parent b938eace
...@@ -1720,6 +1720,8 @@ static bool ibs_enabled(struct kvm_vcpu *vcpu) ...@@ -1720,6 +1720,8 @@ static bool ibs_enabled(struct kvm_vcpu *vcpu)
static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu) static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu)
{ {
if (!vcpu->requests)
return 0;
retry: retry:
s390_vcpu_unblock(vcpu); s390_vcpu_unblock(vcpu);
/* /*
......
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