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include: Move endof() up from hw/virtio/virtio.h

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endof() is a useful macro, we can make use of it outside of virtio.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 20191011152814.14791-2-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Max Reitz 2019-10-11 17:27:59 +02:00
parent f93c3add3a
commit 5d5b33c080
4 changed files with 14 additions and 14 deletions
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4
hw/block/virtio-blk.c
View file

@ -42,9 +42,9 @@
*/
static VirtIOFeature feature_sizes[] = {
{.flags = 1ULL << VIRTIO_BLK_F_DISCARD,
.end = virtio_endof(struct virtio_blk_config, discard_sector_alignment)},
.end = endof(struct virtio_blk_config, discard_sector_alignment)},
{.flags = 1ULL << VIRTIO_BLK_F_WRITE_ZEROES,
.end = virtio_endof(struct virtio_blk_config, write_zeroes_may_unmap)},
.end = endof(struct virtio_blk_config, write_zeroes_may_unmap)},
{}
};

10
hw/net/virtio-net.c
View file

@ -90,15 +90,15 @@ static inline __virtio16 *virtio_net_rsc_ext_num_dupacks(
static VirtIOFeature feature_sizes[] = {
{.flags = 1ULL << VIRTIO_NET_F_MAC,
.end = virtio_endof(struct virtio_net_config, mac)},
.end = endof(struct virtio_net_config, mac)},
{.flags = 1ULL << VIRTIO_NET_F_STATUS,
.end = virtio_endof(struct virtio_net_config, status)},
.end = endof(struct virtio_net_config, status)},
{.flags = 1ULL << VIRTIO_NET_F_MQ,
.end = virtio_endof(struct virtio_net_config, max_virtqueue_pairs)},
.end = endof(struct virtio_net_config, max_virtqueue_pairs)},
{.flags = 1ULL << VIRTIO_NET_F_MTU,
.end = virtio_endof(struct virtio_net_config, mtu)},
.end = endof(struct virtio_net_config, mtu)},
{.flags = 1ULL << VIRTIO_NET_F_SPEED_DUPLEX,
.end = virtio_endof(struct virtio_net_config, duplex)},
.end = endof(struct virtio_net_config, duplex)},
{}
};

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

@ -37,13 +37,6 @@ 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;

7
include/qemu/compiler.h
View file

@ -60,6 +60,13 @@
#define sizeof_field(type, field) sizeof(((type *)0)->field)
/*
* Calculate the number of bytes up to and including the given 'field' of
* 'container'.
*/
#define endof(container, field) \
(offsetof(container, field) + sizeof_field(container, field))
/* Convert from a base type to a parent type, with compile time checking. */
#ifdef __GNUC__
#define DO_UPCAST(type, field, dev) ( __extension__ ( { \