Re: [Xen-devel] [PATCH] x86: convert x86_platform_ops to timespec64

[Paolo Bonzini <pbonzini@xxxxxxxxxx>]

On 16/10/2017 10:11, Arnd Bergmann wrote:
> Thanks!
> 
> Since you've looked at it overall, do you have an opinion on the question
> how to fix the PV interface to deal with the pvclock_wall_clock overflow?

It has to be done separately for each hypervisor.

In KVM, for example, it is probably best to abandon
pvclock_read_wallclock altogether, and instead use the recently
introduced KVM_HC_CLOCK_PAIRING hypercall.  drivers/ptp/ptp_kvm.c is
already using it and it's y2106 safe.

Paolo

> Should we add a new version now and deprecate the existing one, or
> do you think that y2106 is far enough out that we should just ignore the
> problem?


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