Re: [RFC PATCH v3 4/6] psci: Add hvc call service for ptp_kvm.

[Paolo Bonzini]

On 09/10/19 07:21, Jianyong Wu (Arm Technology China) wrote:
> As ptp_kvm clock has fixed to arm arch system counter in patch set
> v4, we need check if the current clocksource is system counter when
> return clock cycle in host, so a helper needed to return the current
> clocksource. Could I add this helper in next patch set?

You don't need a helper.  You need to return the ARM arch counter
clocksource in the struct system_counterval_t that you return.
get_device_system_crosststamp will then check that the clocksource
matches the active one.

Paolo