Some legacy devices will support two-stage queue indicators and therefore won't reject CCW_CMD_SET_IND_ADAPTER. Note this. VIRTIO-127 Signed-off-by: Cornelia Huck <
cornelia.huck@de.ibm.com> --- content.tex 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/content.tex b/content.tex index 391af97..15b9cba 100644 --- a/content.tex +++ b/content.tex @@ -2742,8 +2742,11 @@ command reject to any subsequent CCW_CMD_SET_IND_ADAPTER command. paragraph{Legacy Interfaces: A Note on Setting Up Indicators}label{sec:Virtio Transport Options / Virtio over channel I/O / Device Initialization / Setting Up Indicators / Legacy Interfaces: A Note on Setting Up Indicators} -Legacy devices will only support classic queue indicators; they will -reject CCW_CMD_SET_IND_ADAPTER as they don't know that command. +In some cases, legacy devices will only support classic queue indicators; +in that case, they will reject CCW_CMD_SET_IND_ADAPTER as they don't know that +command. Some legacy devices will support two-stage queue indicators, though, +and a driver will be able to successfully use CCW_CMD_SET_IND_ADAPTER to set +them up. subsection{Device Operation}label{sec:Virtio Transport Options / Virtio over channel I/O / Device Operation} -- 1.7.9.5