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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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5
hw/block/dataplane/xen-block.c
View file

@ -633,8 +633,9 @@ XenBlockDataPlane *xen_block_dataplane_create(XenDevice *xendev,
} else {
dataplane->ctx = qemu_get_aio_context();
}
dataplane->bh = aio_bh_new(dataplane->ctx, xen_block_dataplane_bh,
dataplane);
dataplane->bh = aio_bh_new_guarded(dataplane->ctx, xen_block_dataplane_bh,
dataplane,
&DEVICE(xendev)->mem_reentrancy_guard);
return dataplane;
}