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virtio, vhost, pc: fixes

Browse source 
Most notably this fixes a regression with vhost introduced by the pull before
 last.
 
 Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge remote-tracking branch 'mst/tags/for_upstream' into staging

virtio, vhost, pc: fixes

Most notably this fixes a regression with vhost introduced by the pull before
last.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

# gpg: Signature made Fri 18 Nov 2016 03:51:55 PM GMT
# gpg:                using RSA key 0x281F0DB8D28D5469
# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>"
# gpg:                 aka "Michael S. Tsirkin <mst@redhat.com>"
# Primary key fingerprint: 0270 606B 6F3C DF3D 0B17  0970 C350 3912 AFBE 8E67
#      Subkey fingerprint: 5D09 FD08 71C8 F85B 94CA  8A0D 281F 0DB8 D28D 5469

* mst/tags/for_upstream:
  acpi: Use apic_id_limit when calculating legacy ACPI table size
  ipmi: fix qemu crash while migrating with ipmi
  ivshmem: Fix 64 bit memory bar configuration
  virtio: set ISR on dataplane notifications
  virtio: access ISR atomically
  virtio: introduce grab/release_ioeventfd to fix vhost
  virtio-crypto: fix virtio_queue_set_notification() race

Message-id: 1479484366-7977-1-git-send-email-mst@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2016-11-21 11:09:58 +00:00
commit c36ed06e91
15 changed files with 151 additions and 57 deletions
Download patch file Download diff file Expand all files Collapse all files

14
include/hw/virtio/virtio-bus.h
View file

@ -97,6 +97,16 @@ struct VirtioBusState {
* Set if ioeventfd has been started.
*/
bool ioeventfd_started;
/*
* Set if ioeventfd has been grabbed by vhost. When ioeventfd
* is grabbed by vhost, we track its started/stopped state (which
* depends in turn on the virtio status register), but do not
* register a handler for the ioeventfd. When ioeventfd is
* released, if ioeventfd_started is true we finally register
* the handler so that QEMU's device model can use ioeventfd.
*/
int ioeventfd_grabbed;
};
void virtio_bus_device_plugged(VirtIODevice *vdev, Error **errp);
@ -131,6 +141,10 @@ bool virtio_bus_ioeventfd_enabled(VirtioBusState *bus);
int virtio_bus_start_ioeventfd(VirtioBusState *bus);
/* Stop the ioeventfd. */
void virtio_bus_stop_ioeventfd(VirtioBusState *bus);
/* Tell the bus that vhost is grabbing the ioeventfd. */
int virtio_bus_grab_ioeventfd(VirtioBusState *bus);
/* bus that vhost is not using the ioeventfd anymore. */
void virtio_bus_release_ioeventfd(VirtioBusState *bus);
/* Switch from/to the generic ioeventfd handler */
int virtio_bus_set_host_notifier(VirtioBusState *bus, int n, bool assign);

1
include/hw/virtio/virtio-scsi.h
View file

@ -137,6 +137,5 @@ void virtio_scsi_push_event(VirtIOSCSI *s, SCSIDevice *dev,
void virtio_scsi_dataplane_setup(VirtIOSCSI *s, Error **errp);
int virtio_scsi_dataplane_start(VirtIODevice *s);
void virtio_scsi_dataplane_stop(VirtIODevice *s);
void virtio_scsi_dataplane_notify(VirtIODevice *vdev, VirtIOSCSIReq *req);
#endif /* QEMU_VIRTIO_SCSI_H */

4
include/hw/virtio/virtio.h
View file

@ -181,6 +181,7 @@ void virtqueue_get_avail_bytes(VirtQueue *vq, unsigned int *in_bytes,
unsigned max_in_bytes, unsigned max_out_bytes);
bool virtio_should_notify(VirtIODevice *vdev, VirtQueue *vq);
void virtio_notify_irqfd(VirtIODevice *vdev, VirtQueue *vq);
void virtio_notify(VirtIODevice *vdev, VirtQueue *vq);
void virtio_save(VirtIODevice *vdev, QEMUFile *f);
@ -272,13 +273,14 @@ void virtio_queue_set_guest_notifier_fd_handler(VirtQueue *vq, bool assign,
bool with_irqfd);
int virtio_device_start_ioeventfd(VirtIODevice *vdev);
void virtio_device_stop_ioeventfd(VirtIODevice *vdev);
int virtio_device_grab_ioeventfd(VirtIODevice *vdev);
void virtio_device_release_ioeventfd(VirtIODevice *vdev);
bool virtio_device_ioeventfd_enabled(VirtIODevice *vdev);
EventNotifier *virtio_queue_get_host_notifier(VirtQueue *vq);
void virtio_queue_host_notifier_read(EventNotifier *n);
void virtio_queue_aio_set_host_notifier_handler(VirtQueue *vq, AioContext *ctx,
void (*fn)(VirtIODevice *,
VirtQueue *));
void virtio_irq(VirtQueue *vq);
VirtQueue *virtio_vector_first_queue(VirtIODevice *vdev, uint16_t vector);
VirtQueue *virtio_vector_next_queue(VirtQueue *vq);