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| author | Paul Durrant | 2019-04-08 17:16:17 +0200 |
|---|---|---|
| committer | Anthony PERARD | 2019-06-24 11:42:29 +0200 |
| commit | 345f42b4be9f9975ff3f7f3e95acae4f67c74f89 (patch) | |
| tree | e9c8d791310f56d9e36be4851d9b84a870d62375 /include/hw/xen | |
| parent | xen-bus: allow AioContext to be specified for each event channel (diff) | |
| download | qemu-345f42b4be9f9975ff3f7f3e95acae4f67c74f89.tar.gz qemu-345f42b4be9f9975ff3f7f3e95acae4f67c74f89.tar.xz qemu-345f42b4be9f9975ff3f7f3e95acae4f67c74f89.zip | |
xen-bus / xen-block: add support for event channel polling
This patch introduces a poll callback for event channel fd-s and uses
this to invoke the channel callback function.
To properly support polling, it is necessary for the event channel callback
function to return a boolean saying whether it has done any useful work or
not. Thus xen_block_dataplane_event() is modified to directly invoke
xen_block_handle_requests() and the latter only returns true if it actually
processes any requests. This also means that the call to qemu_bh_schedule()
is moved into xen_block_complete_aio(), which is more intuitive since the
only reason for doing a deferred poll of the shared ring should be because
there were previously insufficient resources to fully complete a previous
poll.
Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Reviewed-by: Anthony PERARD <anthony.perard@citrix.com>
Message-Id: <20190408151617.13025-4-paul.durrant@citrix.com>
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Diffstat (limited to 'include/hw/xen')
| -rw-r--r-- | include/hw/xen/xen-bus.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/hw/xen/xen-bus.h b/include/hw/xen/xen-bus.h index 8183b98c7d..1c2d9dfdb8 100644 --- a/include/hw/xen/xen-bus.h +++ b/include/hw/xen/xen-bus.h @@ -119,7 +119,7 @@ void xen_device_copy_grant_refs(XenDevice *xendev, bool to_domain, XenDeviceGrantCopySegment segs[], unsigned int nr_segs, Error **errp); -typedef void (*XenEventHandler)(void *opaque); +typedef bool (*XenEventHandler)(void *opaque); XenEventChannel *xen_device_bind_event_channel(XenDevice *xendev, AioContext *ctx, |