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virtio-net: make VirtIOFeature usable for other virtio devices

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In order to use VirtIOFeature also in other virtio devices, we move
its declaration and the endof() macro (renamed in virtio_endof())
in virtio.h.
We add virtio_feature_get_config_size() function to iterate the array
of VirtIOFeature and to return the config size depending on the
features enabled. (as virtio_net_set_config_size() did)

Suggested-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Message-id: 20190221103314.58500-5-sgarzare@redhat.com
Message-Id: <20190221103314.58500-5-sgarzare@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Stefano Garzarella 2019-02-21 11:33:08 +01:00 • committed by Stefan Hajnoczi
parent 5c81161f80
commit ba550851f5
3 changed files with 37 additions and 24 deletions
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15
include/hw/virtio/virtio.h
View file

@ -37,6 +37,21 @@ static inline hwaddr vring_align(hwaddr addr,
return QEMU_ALIGN_UP(addr, align);
}
/*
* Calculate the number of bytes up to and including the given 'field' of
* 'container'.
*/
#define virtio_endof(container, field) \
(offsetof(container, field) + sizeof_field(container, field))
typedef struct VirtIOFeature {
uint64_t flags;
size_t end;
} VirtIOFeature;
size_t virtio_feature_get_config_size(VirtIOFeature *features,
uint64_t host_features);
typedef struct VirtQueue VirtQueue;
#define VIRTQUEUE_MAX_SIZE 1024