VFIO updates for 2.4-rc0

- "real" host page size API (Peter Crosthwaite)
 - platform device irqfd support (Eric Auger)
 - spapr container disconnect fix (Alexey Kardashevskiy)
 - quirk for broken Chelsio hardware (Gabriel Laupre)
 - coverity fix (Paolo Bonzini)
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Merge remote-tracking branch 'remotes/awilliam/tags/vfio-update-20150706.0' into staging

VFIO updates for 2.4-rc0
- "real" host page size API (Peter Crosthwaite)
- platform device irqfd support (Eric Auger)
- spapr container disconnect fix (Alexey Kardashevskiy)
- quirk for broken Chelsio hardware (Gabriel Laupre)
- coverity fix (Paolo Bonzini)

# gpg: Signature made Mon Jul  6 19:23:49 2015 BST using RSA key ID 3BB08B22
# gpg: Good signature from "Alex Williamson <alex.williamson@redhat.com>"
# gpg:                 aka "Alex Williamson <alex@shazbot.org>"
# gpg:                 aka "Alex Williamson <alwillia@redhat.com>"
# gpg:                 aka "Alex Williamson <alex.l.williamson@gmail.com>"

* remotes/awilliam/tags/vfio-update-20150706.0:
  vfio/pci : Add pba_offset PCI quirk for Chelsio T5 devices
  vfio: Unregister IOMMU notifiers when container is destroyed
  hw/vfio/platform: add irqfd support
  kvm: some fixes to kvm_resamplefds_allowed
  sysbus: add irq_routing_notifier
  intc: arm_gic_kvm: set the qemu_irq/gsi mapping
  kvm-all.c: add qemu_irq/gsi hash table and utility routines
  kvm: rename kvm_irqchip_[add,remove]_irqfd_notifier with gsi suffix
  vfio: cpu: Use "real" page size API
  cpu-all: complete "real" host page size API
  vfio: fix return type of pread

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

Conflicts:
	kvm-all.c

kvm-all.c

@@ -35,6 +35,7 @@
 #include "exec/address-spaces.h"
 #include "qemu/event_notifier.h"
 #include "trace.h"
+#include "hw/irq.h"
 
 #include "hw/boards.h"
 
@@ -84,6 +85,7 @@ struct KVMState
      * unsigned, and treating them as signed here can break things */
     unsigned irq_set_ioctl;
     unsigned int sigmask_len;
+    GHashTable *gsimap;
 #ifdef KVM_CAP_IRQ_ROUTING
     struct kvm_irq_routing *irq_routes;
     int nr_allocated_irq_routes;
@@ -1332,19 +1334,49 @@ int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg)
 }
 #endif /* !KVM_CAP_IRQ_ROUTING */
 
-int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n,
-                                   EventNotifier *rn, int virq)
+int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
+                                       EventNotifier *rn, int virq)
 {
     return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n),
            rn ? event_notifier_get_fd(rn) : -1, virq, true);
 }
 
-int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, int virq)
+int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
+                                          int virq)
 {
     return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), -1, virq,
            false);
 }
 
+int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n,
+                                   EventNotifier *rn, qemu_irq irq)
+{
+    gpointer key, gsi;
+    gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi);
+
+    if (!found) {
+        return -ENXIO;
+    }
+    return kvm_irqchip_add_irqfd_notifier_gsi(s, n, rn, GPOINTER_TO_INT(gsi));
+}
+
+int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n,
+                                      qemu_irq irq)
+{
+    gpointer key, gsi;
+    gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi);
+
+    if (!found) {
+        return -ENXIO;
+    }
+    return kvm_irqchip_remove_irqfd_notifier_gsi(s, n, GPOINTER_TO_INT(gsi));
+}
+
+void kvm_irqchip_set_qemuirq_gsi(KVMState *s, qemu_irq irq, int gsi)
+{
+    g_hash_table_insert(s->gsimap, irq, GINT_TO_POINTER(gsi));
+}
+
 static void kvm_irqchip_create(MachineState *machine, KVMState *s)
 {
     int ret;
@@ -1380,6 +1412,8 @@ static void kvm_irqchip_create(MachineState *machine, KVMState *s)
     kvm_halt_in_kernel_allowed = true;
 
     kvm_init_irq_routing(s);
+
+    s->gsimap = g_hash_table_new(g_direct_hash, g_direct_equal);
 }
 
 /* Find number of supported CPUs using the recommended