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hw/virtio: Introduce virtio_bh_new_guarded() helper

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Introduce virtio_bh_new_guarded(), similar to qemu_bh_new_guarded()
but using the transport memory guard, instead of the device one
(there can only be one virtio device per virtio bus).

Inspired-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20240409105537.18308-2-philmd@linaro.org>
(cherry picked from commit ec0504b989)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
(Mjt: trivial #include context fixup in include/hw/virtio/virtio.h)
This commit is contained in:
Philippe Mathieu-Daudé 2024-04-04 20:56:11 +02:00 committed by Michael Tokarev
parent d6e7ec1f8e
commit e070e5e674
2 changed files with 17 additions and 0 deletions
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10
hw/virtio/virtio.c
View File

@ -5029,3 +5029,13 @@ static void virtio_register_types(void)
}
type_init(virtio_register_types)
QEMUBH *virtio_bh_new_guarded_full(DeviceState *dev,
QEMUBHFunc *cb, void *opaque,
const char *name)
{
DeviceState *transport = qdev_get_parent_bus(dev)->parent;
return qemu_bh_new_full(cb, opaque, name,
&transport->mem_reentrancy_guard);
}

7
include/hw/virtio/virtio.h
View File

@ -23,6 +23,7 @@
#include "standard-headers/linux/virtio_ring.h"
#include "qom/object.h"
#include "hw/virtio/vhost.h"
#include "block/aio.h"
/*
* A guest should never accept this. It implies negotiation is broken
@ -463,4 +464,10 @@ static inline bool virtio_device_disabled(VirtIODevice *vdev)
bool virtio_legacy_allowed(VirtIODevice *vdev);
bool virtio_legacy_check_disabled(VirtIODevice *vdev);
QEMUBH *virtio_bh_new_guarded_full(DeviceState *dev,
QEMUBHFunc *cb, void *opaque,
const char *name);
#define virtio_bh_new_guarded(dev, cb, opaque) \
virtio_bh_new_guarded_full((dev), (cb), (opaque), (stringify(cb)))
#endif