Re: [PATCH 4/8] i386: hvf: Implement CPU kick

[Paolo Bonzini]

On 29/06/20 16:04, Roman Bolshakov wrote:
> My approach is based
> hv_vcpu_run() and should hopefully work almost anywhere where
> Hypervisor.framework is available because Hypervisor framework exposes
> timer value
> (https://developer.apple.com/documentation/hypervisor/vmcs_guest_vmx_timer_value)
> since macOS 10.10.3+.

There are a few other constants for which it would be unwise to write
from userspace, so that's not a big consolation. :)

> I can also test how hv_vcpu_run_until() performs with HV_DEADLINE_FOREVER
> on the Beta. And if the performance issues with VMX-preemption timer and
> hv_vcpu_run_until() are fixed there.

Thanks!  The main thing to test on Big Sur would be: 1) whether the
preemption timer bit in the pin controls "sticks" to 0 after setting it
2) whether the bit reads back as zero after
hv_vcpu_run_until(HV_DEADLINE_FOREVER).

Thanks,

Paolo