Upstream: no
If user want to reuse one ASID for many CSV guests, he should provide a
label (i.e. userid) and the length of the label when launch CSV guest.
The reference count of the ASID will be increased if user launch a CSV
guest with the label correspond to the ASID. When a CSV guest which
launch with a label is destroyed, the reference count of the ASID
correspond to the label will be decreased, and the ASID is freed only if
the reference count becomes zero.
The codes for reuse ASID is not compatible with CONFIG_CGROUP_MISC, we
introduce CONFIG_KVM_SUPPORTS_CSV_REUSE_ASID that depends on
!CGROUP_MISC, the code take effect only when
CONFIG_KVM_SUPPORTS_CSV_REUSE_ASID=y.
Signed-off-by: hanliyang <hanliyang@hygon.cn>
079cc16170