On 13.10.2025 12:15, Penny Zheng wrote:
> Helper domctl_lock_{acquire,release} is domctl_lock, which HVM_PARAM_IDENT_PT
> uses to ensure synchronization and hence being a toolstack-only operation.
> So we shall make HVM_PARAM_IDENT_PT conditional upon CONFIG_MGMT_HYPERCALLS,
> returning -EOPNOTSUPP when MGMT_HYPERCALLS=n.
>
> Suggested-by: Jan Beulich <[email protected]>
I fear this isn't quite what I suggested. The param get/set are XSM_TARGET, i.e.
can be used by DM as well. The particular one here shouldn't be used by a DM,
but
that's a different question. Similarly in principle the PVH Dom0 building code
should be able to use this path; it doesn't right now in favor of some open-
coding.
What iirc I did suggest was that the serialization isn't needed when no domctl
can
be used to otherwise alter (relevant) guest state.
Jan
