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hw: replace most qemu_bh_new calls with qemu_bh_new_guarded

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This protects devices from bh->mmio reentrancy issues.

Thanks: Thomas Huth <thuth@redhat.com> for diagnosing OS X test failure.
Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Paul Durrant <paul@xen.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20230427211013.2994127-5-alxndr@bu.edu>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Alexander Bulekov 2023-04-27 17:10:09 -04:00 • committed by Thomas Huth
parent ef56ffbdd6
commit f63192b054
25 changed files with 66 additions and 33 deletions
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3
hw/char/virtio-serial-bus.c
View file

@ -985,7 +985,8 @@ static void virtser_port_device_realize(DeviceState *dev, Error **errp)
return;
}
port->bh = qemu_bh_new(flush_queued_data_bh, port);
port->bh = qemu_bh_new_guarded(flush_queued_data_bh, port,
&dev->mem_reentrancy_guard);
port->elem = NULL;
}