[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index] | [List Home]
Subject: [PATCH 2/3] ccw: clarify passing of subchannel id
Make clear that the upper half of the register must be ignored, just like normal I/O instructions do. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> --- content.tex | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/content.tex b/content.tex index 81237a0..b1c4ed1 100644 --- a/content.tex +++ b/content.tex @@ -2243,6 +2243,10 @@ GPR & Input Value & Output Value \\ \hline \end{tabular} +The device MUST ignore bits 0-31 (counting from the left) of GPR2. +This aligns passing the subchannel ID with the way it is passed +for the existing I/O instructions. + Host cookie is an optional per-virtqueue 64 bit value that can be used by the hypervisor to speed up the notification execution. For each notification, the output value is returned in GPR2 and -- 1.7.9.5
[Date Prev] | [Thread Prev] | [Thread Next] | [Date Next] -- [Date Index] | [Thread Index] | [List Home]