From b15a61fdae976eb1ca8f2deee6a63dc3407d7ec6 Mon Sep 17 00:00:00 2001 From: Paolo Abeni Date: Mon, 22 Sep 2025 16:18:18 +0200 Subject: virtio: introduce extended features type The virtio specifications allows for up to 128 bits for the device features. Soon we are going to use some of the 'extended' bits features (bit 64 and above) for the virtio net driver. Represent the virtio features bitmask with a fixed size array, and introduce a few helpers to help manipulate them. Most drivers will keep using only 64 bits features space: use union to allow them access the lower part of the extended space without any per driver change. Reviewed-by: Akihiko Odaki Acked-by: Jason Wang Acked-by: Stefano Garzarella Signed-off-by: Paolo Abeni Tested-by: Lei Yang Reviewed-by: Michael S. Tsirkin Message-ID: <6a9bbb5eb33830f20afbcb7e64d300af4126dd98.1758549625.git.pabeni@redhat.com> Signed-off-by: Michael S. Tsirkin --- include/hw/virtio/virtio.h | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'include/hw/virtio/virtio.h') diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h index c594764f23..39e4059a66 100644 --- a/include/hw/virtio/virtio.h +++ b/include/hw/virtio/virtio.h @@ -16,6 +16,7 @@ #include "system/memory.h" #include "hw/qdev-core.h" +#include "hw/virtio/virtio-features.h" #include "net/net.h" #include "migration/vmstate.h" #include "qemu/event_notifier.h" @@ -121,9 +122,9 @@ struct VirtIODevice * backend (e.g. vhost) and could potentially be a subset of the * total feature set offered by QEMU. */ - uint64_t host_features; - uint64_t guest_features; - uint64_t backend_features; + VIRTIO_DECLARE_FEATURES(host_features); + VIRTIO_DECLARE_FEATURES(guest_features); + VIRTIO_DECLARE_FEATURES(backend_features); size_t config_len; void *config; -- cgit 1.4.1