Re: [PATCH] x86: convert x86_platform_ops to timespec64

[Arnd Bergmann]

On Mon, Oct 16, 2017 at 2:08 PM, Paolo Bonzini <pbonzini@xxxxxxxxxx> wrote:
> 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.

Right, makes sense. I see that this interface is currently implemented
only for 64-bit x86 in kvm_emulate_hypercall(). Could this be extended
to x86-32 and the non-x86 architectures as well?

       Arnd