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[11/19] s390x: Dispatch interrupts to KVM or the real CPU

Message ID 1301405386-25738-12-git-send-email-agraf@suse.de
State New
Headers show

Commit Message

Alexander Graf March 29, 2011, 1:29 p.m. UTC 
The KVM interrupt injection path is non-generic for now. So we need to push
knowledge of how to inject a device interrupt using KVM into the actual device
code.

Signed-off-by: Alexander Graf <agraf@suse.de>
---
 hw/s390-virtio-bus.c |   10 ++++++++--
 1 files changed, 8 insertions(+), 2 deletions(-)
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Patch

diff --git a/hw/s390-virtio-bus.c b/hw/s390-virtio-bus.c
index 58af164..6a32939 100644
--- a/hw/s390-virtio-bus.c
+++ b/hw/s390-virtio-bus.c
@@ -43,6 +43,8 @@ 
     do { } while (0)
 #endif
 
+#define VIRTIO_EXT_CODE   0x2603
+
 struct BusInfo s390_virtio_bus_info = {
     .name       = "s390-virtio",
     .size       = sizeof(VirtIOS390Bus),
@@ -304,9 +306,13 @@  static void virtio_s390_notify(void *opaque, uint16_t vector)
 {
     VirtIOS390Device *dev = (VirtIOS390Device*)opaque;
     uint64_t token = s390_virtio_device_vq_token(dev, vector);
+    CPUState *env = s390_cpu_addr2state(0);
 
-    /* XXX kvm dependency! */
-    kvm_s390_virtio_irq(s390_cpu_addr2state(0), 0, token);
+    if (kvm_enabled()) {
+        kvm_s390_virtio_irq(env, 0, token);
+    } else {
+        cpu_inject_ext(env, VIRTIO_EXT_CODE, 0, token);
+    }
 }
 
 static unsigned virtio_s390_get_features(void *opaque)