s390x/virtio-ccw: wire up irq routing and irqfds

Make use of the new s390 adapter irq routing support to enable real
in-kernel irqfds for virtio-ccw with adapter interrupts.

Note that s390 doesn't provide the common KVM_CAP_IRQCHIP capability, but
rather needs KVM_CAP_S390_IRQCHIP to be enabled. This is to ensure backward
compatibility.

Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>

4 files changed, 38 insertions, 0 deletions

diff --git a/include/hw/s390x/adapter.h b/include/hw/s390x/adapter.h
new file mode 100644
index 0000000000..7f1703508c
--- /dev/null
+++ b/include/hw/s390x/adapter.h
@@ -0,0 +1,23 @@
+/*
+ * s390 adapter definitions
+ *
+ * Copyright 2013,2014 IBM Corp.
+ * Author(s): Cornelia Huck <cornelia.huck@de.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or (at
+ * your option) any later version. See the COPYING file in the top-level
+ * directory.
+ */
+
+#ifndef S390X_ADAPTER_H
+#define S390X_ADAPTER_H
+
+struct AdapterInfo {
+    uint64_t ind_addr;
+    uint64_t summary_addr;
+    uint64_t ind_offset;
+    uint32_t summary_offset;
+    uint32_t adapter_id;
+};
+
+#endif
diff --git a/include/hw/s390x/s390_flic.h b/include/hw/s390x/s390_flic.h
index 83913ec097..489d73b9b3 100644
--- a/include/hw/s390x/s390_flic.h
+++ b/include/hw/s390x/s390_flic.h
@@ -14,6 +14,14 @@
 #define __HW_S390_FLIC_H
 
 #include "hw/sysbus.h"
+#include "hw/s390x/adapter.h"
+#include "hw/virtio/virtio.h"
+
+typedef struct AdapterRoutes {
+    AdapterInfo adapter;
+    int num_routes;
+    int gsi[VIRTIO_PCI_QUEUE_MAX];
+} AdapterRoutes;
 
 #define TYPE_S390_FLIC_COMMON "s390-flic"
 #define S390_FLIC_COMMON(obj) \
@@ -34,6 +42,10 @@ typedef struct S390FLICStateClass {
 
     int (*register_io_adapter)(S390FLICState *fs, uint32_t id, uint8_t isc,
                                bool swap, bool maskable);
+    int (*io_adapter_map)(S390FLICState *fs, uint32_t id, uint64_t map_addr,
+                          bool do_map);
+    int (*add_adapter_routes)(S390FLICState *fs, AdapterRoutes *routes);
+    void (*release_adapter_routes)(S390FLICState *fs, AdapterRoutes *routes);
 } S390FLICStateClass;
 
 #define TYPE_KVM_S390_FLIC "s390-flic-kvm"
diff --git a/include/qemu/typedefs.h b/include/qemu/typedefs.h
index 86bab123a4..5f20b0e263 100644
--- a/include/qemu/typedefs.h
+++ b/include/qemu/typedefs.h
@@ -74,5 +74,6 @@ typedef struct SHPCDevice SHPCDevice;
 typedef struct FWCfgState FWCfgState;
 typedef struct PcGuestInfo PcGuestInfo;
 typedef struct Range Range;
+typedef struct AdapterInfo AdapterInfo;
 
 #endif /* QEMU_TYPEDEFS_H */
diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
index 25c8a2bdfd..e79e92c50e 100644
--- a/include/sysemu/kvm.h
+++ b/include/sysemu/kvm.h
@@ -363,6 +363,8 @@ int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg);
 int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg);
 void kvm_irqchip_release_virq(KVMState *s, int virq);
 
+int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo *adapter);
+
 int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n,
                                    EventNotifier *rn, int virq);
 int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, int virq);