This patch splits the device status field of virtio-net into ro and rw byte. This would simplify the implementation of both host and guest and make the layout more clean. As VIRTIO_NET_S_ANNOUNCE is a rw bit, it was moved to bit 8 (0x100). btw. looks like there's no implementation that depends on VIRTIO_NET_S_ANNOUNCE, so the move is safe. Signed-off-by: Jason Wang <jasowang@xxxxxxxxxx> --- virtio-0.9.4.lyx | 20 +++++++++++++++++++- 1 files changed, 19 insertions(+), 1 deletions(-) diff --git a/virtio-0.9.4.lyx b/virtio-0.9.4.lyx index 6c7bab1..ef3951c 100644 --- a/virtio-0.9.4.lyx +++ b/virtio-0.9.4.lyx @@ -58,6 +58,7 @@ \html_be_strict false \author -608949062 "Rusty Russell,,," \author 1531152142 "pbonzini" +\author 2090695081 "Jason" \end_header \begin_body @@ -4012,8 +4013,19 @@ configuration layout Two configuration fields are currently defined. The mac address field always exists (though is only valid if VIRTIO_NET_F_MAC is set), and the status field only exists if VIRTIO_NET_F_STATUS is set. + +\change_inserted 2090695081 1331907586 + The low byte of status field is read-only, guest write to this byte would + be ignored. + Currently only one bit is defined for this byte: VIRTIO_NET_S_LINK_UP. + The high byte of status field is read-writable. + Currently only one bit is defined for this byte: VIRTIO_NET_S_ANNOUNCE. + +\change_deleted 2090695081 1331907489 Two bits are currently defined for the status field: VIRTIO_NET_S_LINK_UP and VIRTIO_NET_S_ANNOUNCE. + +\change_unchanged \begin_inset listings inline false @@ -4026,7 +4038,13 @@ status open \begin_layout Plain Layout -#define VIRTIO_NET_S_ANNOUNCE 2 +#define VIRTIO_NET_S_ANNOUNCE +\change_inserted 2090695081 1331907493 +0x100 +\change_deleted 2090695081 1331907491 +2 +\change_unchanged + \end_layout \begin_layout Plain Layout _______________________________________________ Virtualization mailing list Virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/virtualization
