On Thu, Jun 20, 2024 at 11:16:14PM -0700, Dexuan Cui wrote: > In a TDX VM without paravisor, currently the default timer is the Hyper-V > timer, which depends on the slow VM Reference Counter MSR: the Hyper-V TSC > page is not enabled in such a VM because the VM uses Invariant TSC as a > better clocksource and it's challenging to mark the Hyper-V TSC page shared > in very early boot. > > Lower the rating of the Hyper-V timer so the local APIC timer becomes the > the default timer in such a VM, and print a warning in case Invariant TSC > is unavailable in such a VM. This change should cause no perceivable > performance difference. > > Cc: stable@xxxxxxxxxxxxxxx # 6.6+ > Reviewed-by: Roman Kisel <romank@xxxxxxxxxxxxxxxxxxx> > Signed-off-by: Dexuan Cui <decui@xxxxxxxxxxxxx> Applied to hyperv-fixes. Thanks.
