From: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx> Sent: Tuesday, July 31, 2018 4:20 AM
>
> Reviewed-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>
Thanks for the review
>
> Alternatively, we can get rid of synic_initialized flag altogether:
> hv_synic_init() never fails in the first place but we can always
> implement something like:
>
> int hv_synic_is_initialized(void) {
> union hv_synic_scontrol sctrl;
>
> hv_get_synic_state(sctrl.as_uint64);
>
> return sctrl.enable;
> }
>
> as it doesn't seem that we need to check synic state on _other_ CPUs.
>
> --
> Vitaly
I was trying to decide if there are any arguments in favor of one
approach vs. the other: a per-cpu flag in memory or checking
the synic_control "enable" bit. Seems like a wash to me, in which
case I have a slight preference for the per-cpu flag in memory vs.
creating another function to return sctrl.enable. But I'm completely
open to reasons why checking sctrl.enable is better.
Michael
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