commit bbd8bb8e3245cf6fc6d12b10b3320ab183adb866
author Cornelia Huck <cornelia.huck@de.ibm.com> Wed Mar 12 12:40:31 2014 +0100
committer Cornelia Huck <cornelia.huck@de.ibm.com> Tue Jun 10 09:50:27 2014 +0200
tree 22a30379a02d6d83be2f11bc432f81e82d4953eb
parent de13d2161473d02ae97ec0f8e4503147554892dd

s390x/kvm: inject via flic

Try to inject floating interrupts via the flic if it is available.
This allows us to inject the full range of floating interrupts.

Reviewed-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>

hw/intc/s390_flic_kvm.c

diff --git a/hw/intc/s390_flic_kvm.c b/hw/intc/s390_flic_kvm.c
index a734094..b471e7a 100644
--- a/hw/intc/s390_flic_kvm.c
+++ b/hw/intc/s390_flic_kvm.c
@@ -117,6 +117,16 @@
     return rc ? -errno : 0;
 }
 
+int kvm_s390_inject_flic(struct kvm_s390_irq *irq)
+{
+    static KVMS390FLICState *flic;
+
+    if (unlikely(!flic)) {
+        flic = KVM_S390_FLIC(s390_get_flic());
+    }
+    return flic_enqueue_irqs(irq, sizeof(*irq), flic);
+}
+
 /**
  * __get_all_irqs - store all pending irqs in buffer
  * @flic: pointer to flic device state

target-s390x/cpu.h

diff --git a/target-s390x/cpu.h b/target-s390x/cpu.h
index 9982c35..b13761d 100644
--- a/target-s390x/cpu.h
+++ b/target-s390x/cpu.h
@@ -365,6 +365,7 @@
 void kvm_s390_service_interrupt(uint32_t parm);
 void kvm_s390_vcpu_interrupt(S390CPU *cpu, struct kvm_s390_irq *irq);
 void kvm_s390_floating_interrupt(struct kvm_s390_irq *irq);
+int kvm_s390_inject_flic(struct kvm_s390_irq *irq);
 #else
 static inline void kvm_s390_reset_vcpu(S390CPU *cpu)
 {

target-s390x/kvm.c

diff --git a/target-s390x/kvm.c b/target-s390x/kvm.c
index a2133ff..a1a4cc2 100644
--- a/target-s390x/kvm.c
+++ b/target-s390x/kvm.c
@@ -623,7 +623,7 @@
     }
 }
 
-void kvm_s390_floating_interrupt(struct kvm_s390_irq *irq)
+static void __kvm_s390_floating_interrupt(struct kvm_s390_irq *irq)
 {
     struct kvm_s390_interrupt kvmint = {};
     int r;
@@ -641,6 +641,23 @@
     }
 }
 
+void kvm_s390_floating_interrupt(struct kvm_s390_irq *irq)
+{
+    static bool use_flic = true;
+    int r;
+
+    if (use_flic) {
+        r = kvm_s390_inject_flic(irq);
+        if (r == -ENOSYS) {
+            use_flic = false;
+        }
+        if (!r) {
+            return;
+        }
+    }
+    __kvm_s390_floating_interrupt(irq);
+}
+
 void kvm_s390_virtio_irq(int config_change, uint64_t token)
 {
     struct kvm_s390_irq irq = {