memory: pass EventNotifier, not eventfd

Under Win32, EventNotifiers will not have event_notifier_get_fd, so we
cannot call it in common code such as hw/virtio-pci.c.  Pass a pointer to
the notifier, and only retrieve the file descriptor in kvm-specific code.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

9 files changed, 42 insertions, 32 deletions

diff --git a/exec.c b/exec.c
index 8244d54a85..29b5078bbd 100644
--- a/exec.c
+++ b/exec.c
@@ -3212,13 +3212,13 @@ static void core_log_global_stop(MemoryListener *listener)
 
 static void core_eventfd_add(MemoryListener *listener,
                              MemoryRegionSection *section,
-                             bool match_data, uint64_t data, int fd)
+                             bool match_data, uint64_t data, EventNotifier *e)
 {
 }
 
 static void core_eventfd_del(MemoryListener *listener,
                              MemoryRegionSection *section,
-                             bool match_data, uint64_t data, int fd)
+                             bool match_data, uint64_t data, EventNotifier *e)
 {
 }
 
@@ -3278,13 +3278,13 @@ static void io_log_global_stop(MemoryListener *listener)
 
 static void io_eventfd_add(MemoryListener *listener,
                            MemoryRegionSection *section,
-                           bool match_data, uint64_t data, int fd)
+                           bool match_data, uint64_t data, EventNotifier *e)
 {
 }
 
 static void io_eventfd_del(MemoryListener *listener,
                            MemoryRegionSection *section,
-                           bool match_data, uint64_t data, int fd)
+                           bool match_data, uint64_t data, EventNotifier *e)
 {
 }
 
diff --git a/hw/ivshmem.c b/hw/ivshmem.c
index 19e164a353..bba21c55e2 100644
--- a/hw/ivshmem.c
+++ b/hw/ivshmem.c
@@ -350,7 +350,7 @@ static void ivshmem_add_eventfd(IVShmemState *s, int posn, int i)
                               4,
                               true,
                               (posn << 16) | i,
-                              event_notifier_get_fd(&s->peers[posn].eventfds[i]));
+                              &s->peers[posn].eventfds[i]);
 }
 
 static void ivshmem_del_eventfd(IVShmemState *s, int posn, int i)
@@ -360,7 +360,7 @@ static void ivshmem_del_eventfd(IVShmemState *s, int posn, int i)
                               4,
                               true,
                               (posn << 16) | i,
-                              event_notifier_get_fd(&s->peers[posn].eventfds[i]));
+                              &s->peers[posn].eventfds[i]);
 }
 
 static void close_guest_eventfds(IVShmemState *s, int posn)
diff --git a/hw/vhost.c b/hw/vhost.c
index 43664e7f4d..0fd8da84e2 100644
--- a/hw/vhost.c
+++ b/hw/vhost.c
@@ -737,13 +737,13 @@ static void vhost_virtqueue_cleanup(struct vhost_dev *dev,
 
 static void vhost_eventfd_add(MemoryListener *listener,
                               MemoryRegionSection *section,
-                              bool match_data, uint64_t data, int fd)
+                              bool match_data, uint64_t data, EventNotifier *e)
 {
 }
 
 static void vhost_eventfd_del(MemoryListener *listener,
                               MemoryRegionSection *section,
-                              bool match_data, uint64_t data, int fd)
+                              bool match_data, uint64_t data, EventNotifier *e)
 {
 }
 
diff --git a/hw/virtio-pci.c b/hw/virtio-pci.c
index 9342eed070..a555728b25 100644
--- a/hw/virtio-pci.c
+++ b/hw/virtio-pci.c
@@ -174,10 +174,10 @@ static int virtio_pci_set_host_notifier_internal(VirtIOPCIProxy *proxy,
             return r;
         }
         memory_region_add_eventfd(&proxy->bar, VIRTIO_PCI_QUEUE_NOTIFY, 2,
-                                  true, n, event_notifier_get_fd(notifier));
+                                  true, n, notifier);
     } else {
         memory_region_del_eventfd(&proxy->bar, VIRTIO_PCI_QUEUE_NOTIFY, 2,
-                                  true, n, event_notifier_get_fd(notifier));
+                                  true, n, notifier);
         /* Handle the race condition where the guest kicked and we deassigned
          * before we got around to handling the kick.
          */
diff --git a/hw/xen_pt.c b/hw/xen_pt.c
index 3b6d1867ab..fdf68aa564 100644
--- a/hw/xen_pt.c
+++ b/hw/xen_pt.c
@@ -634,7 +634,7 @@ static void xen_pt_log_global_fns(MemoryListener *l)
 }
 
 static void xen_pt_eventfd_fns(MemoryListener *l, MemoryRegionSection *s,
-                               bool match_data, uint64_t data, int fd)
+                               bool match_data, uint64_t data, EventNotifier *n)
 {
 }
 
diff --git a/kvm-all.c b/kvm-all.c
index a0c33b38de..5a386b45f9 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -32,6 +32,7 @@
 #include "bswap.h"
 #include "memory.h"
 #include "exec-memory.h"
+#include "event_notifier.h"
 
 /* This check must be after config-host.h is included */
 #ifdef CONFIG_EVENTFD
@@ -800,23 +801,29 @@ static void kvm_io_ioeventfd_del(MemoryRegionSection *section,
 
 static void kvm_eventfd_add(MemoryListener *listener,
                             MemoryRegionSection *section,
-                            bool match_data, uint64_t data, int fd)
+                            bool match_data, uint64_t data,
+                            EventNotifier *e)
 {
     if (section->address_space == get_system_memory()) {
-        kvm_mem_ioeventfd_add(section, match_data, data, fd);
+        kvm_mem_ioeventfd_add(section, match_data, data,
+			      event_notifier_get_fd(e));
     } else {
-        kvm_io_ioeventfd_add(section, match_data, data, fd);
+        kvm_io_ioeventfd_add(section, match_data, data,
+			     event_notifier_get_fd(e));
     }
 }
 
 static void kvm_eventfd_del(MemoryListener *listener,
                             MemoryRegionSection *section,
-                            bool match_data, uint64_t data, int fd)
+                            bool match_data, uint64_t data,
+                            EventNotifier *e)
 {
     if (section->address_space == get_system_memory()) {
-        kvm_mem_ioeventfd_del(section, match_data, data, fd);
+        kvm_mem_ioeventfd_del(section, match_data, data,
+			      event_notifier_get_fd(e));
     } else {
-        kvm_io_ioeventfd_del(section, match_data, data, fd);
+        kvm_io_ioeventfd_del(section, match_data, data,
+			     event_notifier_get_fd(e));
     }
 }
 
diff --git a/memory.c b/memory.c
index aab4a31323..643871bafa 100644
--- a/memory.c
+++ b/memory.c
@@ -156,7 +156,7 @@ struct MemoryRegionIoeventfd {
     AddrRange addr;
     bool match_data;
     uint64_t data;
-    int fd;
+    EventNotifier *e;
 };
 
 static bool memory_region_ioeventfd_before(MemoryRegionIoeventfd a,
@@ -181,9 +181,9 @@ static bool memory_region_ioeventfd_before(MemoryRegionIoeventfd a,
             return false;
         }
     }
-    if (a.fd < b.fd) {
+    if (a.e < b.e) {
         return true;
-    } else if (a.fd > b.fd) {
+    } else if (a.e > b.e) {
         return false;
     }
     return false;
@@ -597,7 +597,7 @@ static void address_space_add_del_ioeventfds(AddressSpace *as,
                 .size = int128_get64(fd->addr.size),
             };
             MEMORY_LISTENER_CALL(eventfd_del, Forward, &section,
-                                 fd->match_data, fd->data, fd->fd);
+                                 fd->match_data, fd->data, fd->e);
             ++iold;
         } else if (inew < fds_new_nb
                    && (iold == fds_old_nb
@@ -610,7 +610,7 @@ static void address_space_add_del_ioeventfds(AddressSpace *as,
                 .size = int128_get64(fd->addr.size),
             };
             MEMORY_LISTENER_CALL(eventfd_add, Reverse, &section,
-                                 fd->match_data, fd->data, fd->fd);
+                                 fd->match_data, fd->data, fd->e);
             ++inew;
         } else {
             ++iold;
@@ -1195,14 +1195,14 @@ void memory_region_add_eventfd(MemoryRegion *mr,
                                unsigned size,
                                bool match_data,
                                uint64_t data,
-                               int fd)
+                               EventNotifier *e)
 {
     MemoryRegionIoeventfd mrfd = {
         .addr.start = int128_make64(addr),
         .addr.size = int128_make64(size),
         .match_data = match_data,
         .data = data,
-        .fd = fd,
+        .e = e,
     };
     unsigned i;
 
@@ -1225,14 +1225,14 @@ void memory_region_del_eventfd(MemoryRegion *mr,
                                unsigned size,
                                bool match_data,
                                uint64_t data,
-                               int fd)
+                               EventNotifier *e)
 {
     MemoryRegionIoeventfd mrfd = {
         .addr.start = int128_make64(addr),
         .addr.size = int128_make64(size),
         .match_data = match_data,
         .data = data,
-        .fd = fd,
+        .e = e,
     };
     unsigned i;
 
diff --git a/memory.h b/memory.h
index 740c48e8e5..bd1bbaeabe 100644
--- a/memory.h
+++ b/memory.h
@@ -198,9 +198,9 @@ struct MemoryListener {
     void (*log_global_start)(MemoryListener *listener);
     void (*log_global_stop)(MemoryListener *listener);
     void (*eventfd_add)(MemoryListener *listener, MemoryRegionSection *section,
-                        bool match_data, uint64_t data, int fd);
+                        bool match_data, uint64_t data, EventNotifier *e);
     void (*eventfd_del)(MemoryListener *listener, MemoryRegionSection *section,
-                        bool match_data, uint64_t data, int fd);
+                        bool match_data, uint64_t data, EventNotifier *e);
     /* Lower = earlier (during add), later (during del) */
     unsigned priority;
     MemoryRegion *address_space_filter;
@@ -541,7 +541,7 @@ void memory_region_add_eventfd(MemoryRegion *mr,
                                unsigned size,
                                bool match_data,
                                uint64_t data,
-                               int fd);
+                               EventNotifier *e);
 
 /**
  * memory_region_del_eventfd: Cancel an eventfd.
@@ -561,7 +561,8 @@ void memory_region_del_eventfd(MemoryRegion *mr,
                                unsigned size,
                                bool match_data,
                                uint64_t data,
-                               int fd);
+                               EventNotifier *e);
+
 /**
  * memory_region_add_subregion: Add a subregion to a container.
  *
diff --git a/xen-all.c b/xen-all.c
index 59f232395e..61def2ec8f 100644
--- a/xen-all.c
+++ b/xen-all.c
@@ -560,13 +560,15 @@ static void xen_log_global_stop(MemoryListener *listener)
 
 static void xen_eventfd_add(MemoryListener *listener,
                             MemoryRegionSection *section,
-                            bool match_data, uint64_t data, int fd)
+                            bool match_data, uint64_t data,
+                            EventNotifier *e)
 {
 }
 
 static void xen_eventfd_del(MemoryListener *listener,
                             MemoryRegionSection *section,
-                            bool match_data, uint64_t data, int fd)
+                            bool match_data, uint64_t data,
+                            EventNotifier *e)
 {
 }