From 50c1e1491e1981ecba14a477897681d8d0602500 Mon Sep 17 00:00:00 2001 From: Avi Kivity Date: Wed, 8 Feb 2012 21:36:02 +0200 Subject: memory: support stateless memory listeners Current memory listeners are incremental; that is, they are expected to maintain their own state, and receive callbacks for changes to that state. This patch adds support for stateless listeners; these work by receiving a ->begin() callback (which tells them that new state is coming), a sequence of ->region_add() and ->region_nop() callbacks, and then a ->commit() callback which signifies the end of the new state. They should ignore ->region_del() callbacks. Signed-off-by: Avi Kivity --- hw/vhost.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'hw') diff --git a/hw/vhost.c b/hw/vhost.c index 01f676a959..8d3ba5b608 100644 --- a/hw/vhost.c +++ b/hw/vhost.c @@ -436,6 +436,14 @@ static bool vhost_section(MemoryRegionSection *section) && memory_region_is_ram(section->mr); } +static void vhost_begin(MemoryListener *listener) +{ +} + +static void vhost_commit(MemoryListener *listener) +{ +} + static void vhost_region_add(MemoryListener *listener, MemoryRegionSection *section) { @@ -476,6 +484,11 @@ static void vhost_region_del(MemoryListener *listener, } } +static void vhost_region_nop(MemoryListener *listener, + MemoryRegionSection *section) +{ +} + static int vhost_virtqueue_set_addr(struct vhost_dev *dev, struct vhost_virtqueue *vq, unsigned idx, bool enable_log) @@ -756,8 +769,11 @@ int vhost_dev_init(struct vhost_dev *hdev, int devfd, bool force) hdev->features = features; hdev->memory_listener = (MemoryListener) { + .begin = vhost_begin, + .commit = vhost_commit, .region_add = vhost_region_add, .region_del = vhost_region_del, + .region_nop = vhost_region_nop, .log_start = vhost_log_start, .log_stop = vhost_log_stop, .log_sync = vhost_log_sync, -- cgit v1.2.3